Form 10-Q - Quarterly report [Sections 13 or 15(d)]

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM 10-Q

☒	QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934

	For the quarterly period March 31, 2024

☐	TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934

	For the transition period from ________ to ________

Commission file number 000-50368

Air Transport Services Group, Inc.

(Exact name of registrant as specified in its charter)

Delaware	26-1631624
(State or other jurisdiction of incorporation or organization)	(I.R.S. Employer Identification No.)

145 Hunter Drive, Wilmington, OH	45177
(Address of principal executive offices)	(Zip Code)

937-382-5591

(Registrant’s telephone number, including area code)

Securities registered pursuant to Section 12(b) of the Act:

Title of each class	Trading Symbol(s)	Name of each exchange on which registered
Common Stock, par value $0.01 per share	ATSG	The Nasdaq Stock Market LLC

Indicate by check mark whether the registrant (1) has filed all reports required to be filed by Section 13 or 15(d) of the Securities Exchange Act of 1934 during the preceding 12 months (or for such shorter period that the registrant was required to file such reports), and (2) has been subject to such filing requirements for the past 90 days. Yes ☒ No ☐

Indicate by check mark whether the registrant has submitted electronically every Interactive Data File required to be submitted pursuant to Rule 405 of Regulations S-T (§232.405 of this chapter) during the preceding 12 months (or for such shorter period that the registrant was required to submit such files). Yes ☒ No ☐

Indicate by check mark whether the registrant is a large accelerated filer, an accelerated filer, a non-accelerated filer, a smaller reporting company, or an emerging growth company. See the definitions of “large accelerated filer,” “accelerated filer,” “smaller reporting company” and "emerging growth company" in Rule 12b-2 of the Exchange Act.

Large accelerated filer	☒	Accelerated filer	☐	Smaller reporting company	☐
Non-accelerated filer	☐	Emerging growth company	☐

If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act. ☐

Indicate by check mark whether the registrant is a shell company (as defined in Rule 12b-2 of the Act). Yes ☐ No ☒

As of May 9, 2024, there were 65,723,557 shares of the registrant’s common stock outstanding.

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AIR TRANSPORT SERVICES GROUP, INC. AND SUBSIDIARIES

FORM 10-Q

TABLE OF CONTENTS

		Page
PART I. FINANCIAL INFORMATION
Item 1.	Financial Statements	2
	Unaudited Condensed Consolidated Balance Sheets	2
	Unaudited Condensed Consolidated Statements of Operations	3
	Unaudited Condensed Consolidated Statements of Comprehensive Income	4
	Unaudited Condensed Consolidated Statements of Stockholders' Equity	5
	Unaudited Condensed Consolidated Statements of Cash Flows	6
	Notes to Unaudited Condensed Consolidated Financial Statements	7
Item 2.	Management’s Discussion and Analysis of Financial Condition and Results of Operations	26
Item 3.	Quantitative and Qualitative Disclosures About Market Risk	36
Item 4.	Controls and Procedures	36

PART II. OTHER INFORMATION
Item 1.	Legal Proceedings	37
Item 1A.	Risk Factors	37
Item 2.	Unregistered Sales of Equity Securities, Use of Proceeds and Issuer Purchases of Equity Securities	37
Item 5.	Other Information	38
Item 6.	Exhibits	38
SIGNATURES		39

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FILINGS WITH THE SECURITIES AND EXCHANGE COMMISSION

The financial information, including the financial statements, included in this Quarterly Report on Form 10-Q for the quarter ended March 31, 2024 (the "Form 10-Q") should be read in conjunction with the audited consolidated financial statements and notes thereto of Air Transport Services Group, Inc. ("ATSG" or the "Company") included in ATSG's Annual Report on Form 10-K for the year ended December 31, 2023, filed with the Securities and Exchange Commission ("SEC") on February 29, 2024 ("2023 Form 10-K").

The SEC maintains an Internet site that contains reports, proxy and information statements and other information regarding ATSG at www.sec.gov. Additionally, ATSG's filings with the SEC, including annual reports on Form 10-K, quarterly reports on Form 10-Q, current reports on Form 8-K and amendments to these reports, are available free of charge from our website at www.atsginc.com as soon as reasonably practicable after filing with the SEC.

CAUTIONARY NOTE REGARDING FORWARD-LOOKING STATEMENTS

The Private Securities Litigation Reform Act of 1995 (the “Act”) provides a safe harbor for forward-looking statements to encourage companies to provide prospective information, so long as those statements are identified as forward-looking and are accompanied by meaningful cautionary statements identifying important factors that could cause actual results to differ materially from those discussed in the statements. The Company wishes to take advantage of the safe harbor provisions of the Act.

This Quarterly Report on Form 10-Q, including “Management’s Discussion and Analysis of Financial Condition and Results of Operations,” in Part I, Item 2, contains forward-looking statements, within the meaning of the Act. Except for historical information contained in this Form 10-Q, the matters discussed herein contain forward-looking statements that involve inherent risks and uncertainties. Such statements are provided under the “safe harbor” protection of the Act.

Forward-looking statements include, but are not limited to, statements regarding anticipated operating results, prospects and levels of assets under management, technological developments, economic trends, expected transactions and similar matters. The words “may,” “believe,” “expect,” “anticipate,” “target,” “goal,” “project,” “estimate,” “guidance,” “forecast,” “outlook,” “will,” “continue,” “likely,” “should,” “hope,” “seek,” “plan,” “intend” and variations of such words and similar expressions identify forward-looking statements. Similarly, descriptions of the Company’s objectives, strategies, plans, goals or targets are also forward-looking statements. Forward-looking statements are susceptible to a number of risks, uncertainties and other factors. While the Company believes that the assumptions underlying its forward-looking statements are reasonable, investors are cautioned that any of the assumptions could prove to be inaccurate and, accordingly, the Company’s actual results and experiences could differ materially from the anticipated results or other expectations expressed in its forward-looking statements.

A number of important factors may cause the Company’s actual results to differ materially from those indicated by such forward-looking statements. These factors include, but are not limited to: (i) unplanned changes in the market demand for the assets and services of the Company, including the loss of customers or a reduction in the level of services it performs for customers; (ii) its operating airlines’ ability to maintain on-time service and control costs; (iii) the cost and timing with respect to which it is able to purchase and modify aircraft to a cargo configuration; (iv) fluctuations in the Company’s traded share price and in interest rates, which may result in mark-to-market charges on certain financial instruments; (v) the number, timing, and scheduled routes of its aircraft deployments to customers; (vi) its ability to remain in compliance with key agreements with customers, lenders and government agencies; (vii) the impact of supply chain constraints both within and outside the United States, which may be more severe or persist longer than it currently expects; (viii) the impact of the current competitive labor market, which could restrict its ability to fill key positions; and (ix) changes in general economic and/or industry-specific conditions, including inflation and regulatory changes; and (x) other uncontrollable factors such as geopolitical tensions or conflicts and human health crises. Other factors that could cause the Company’s actual results to differ materially from those indicated by such forward-looking statements are discussed in “Risk Factors” in Item 1A to the 2023 Form 10-K and are contained from time to time in the Company's other filings with the SEC, including its annual reports on Form 10-K and quarterly reports on Form 10-Q.

Readers should carefully review this Form 10-Q and should not place undue reliance on the Company’s forward-looking statements. New risks and uncertainties arise from time to time, and factors that the Company currently deems immaterial may become material, and it is impossible for the Company to predict these events or how they may affect it. The forward-looking statements were based on information, plans and estimates as of the date of this Form 10-Q. Except as may be required by applicable law, the Company undertakes no obligation to update any forward-looking statements to reflect changes in underlying assumptions or factors, new information, future events or other changes. The Company does not endorse any projections regarding future performance that may be made by third parties.

CERTAIN DEFINED TERMS IN THIS FORM 10-Q

ATSG and its subsidiaries may sometimes be referred to in this Form 10-Q individually or collectively as the “Company,” “we,” “our,” or “us.” ATSG’s outstanding common stock, par value $0.01 per share, is referred to in this Form 10-Q as “common stock,” “common shares,” “stock” or “shares.”

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PART I. FINANCIAL INFORMATION

ITEM 1. FINANCIAL STATEMENTS.

AIR TRANSPORT SERVICES GROUP, INC. AND SUBSIDIARIES

UNAUDITED CONDENSED CONSOLIDATED BALANCE SHEETS

(In thousands, except share data)

	*March 31, 2024*			*December 31, 2023*
ASSETS
CURRENT ASSETS:
Cash, cash equivalents and restricted cash	$	23,181		$	53,555
Accounts receivable, net of allowance of $1,193 in 2024 and $1,065 in 2023		219,946			215,581
Inventory		49,847			49,939
Prepaid supplies and other		22,386			26,626
TOTAL CURRENT ASSETS		315,360			345,701
Property and equipment, net		2,866,335			2,820,769
Customer incentive		57,049			60,961
Goodwill and acquired intangibles		479,874			482,427
Operating lease assets		49,140			54,060
Other assets		123,979			118,172
TOTAL ASSETS	$	3,891,737		$	3,882,090
LIABILITIES AND STOCKHOLDERS’ EQUITY
CURRENT LIABILITIES:
Accounts payable	$	249,828		$	227,652
Accrued salaries, wages and benefits		55,271			56,650
Accrued expenses		9,786			10,784
Current portion of debt obligations		54,768			54,710
Current portion of lease obligations		18,947			20,167
Unearned revenue		31,075			30,226
TOTAL CURRENT LIABILITIES		419,675			400,189
Long term debt		1,663,006			1,707,572
Stock obligations		1,626			1,729
Post-retirement obligations		17,504			19,368
Long term lease obligations		31,250			34,990
Other liabilities		89,235			64,292
Deferred income taxes		288,016			285,248
TOTAL LIABILITIES		2,510,312			2,513,388
Commitments and contingencies (Note H)
STOCKHOLDERS’ EQUITY:
Preferred stock, 20,000,000 shares authorized, including 75,000 Series A Junior Participating Preferred Stock		—			—
Common stock, par value $0.01 per share; 150,000,000 shares authorized; 65,702,385 and 65,240,961 shares issued and outstanding in 2024 and 2023, respectively		657			652
Additional paid-in capital		838,402			836,270
Retained earnings		597,828			589,209
Accumulated other comprehensive loss		(55,462	)		(57,429	)
TOTAL STOCKHOLDERS’ EQUITY		1,381,425			1,368,702
TOTAL LIABILITIES AND STOCKHOLDERS’ EQUITY	$	3,891,737		$	3,882,090

See notes to the unaudited condensed consolidated financial statements.

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AIR TRANSPORT SERVICES GROUP, INC. AND SUBSIDIARIES

UNAUDITED CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS

(In thousands, except per share data)

	*Three Months Ended*
	*March 31,*
	*2024*			*2023*
REVENUES	$	485,517		$	501,095
OPERATING EXPENSES
Salaries, wages and benefits		171,482			176,715
Depreciation and amortization		90,380			84,728
Maintenance, materials and repairs		49,883			43,833
Fuel		63,545			66,755
Contracted ground and aviation services		15,706			17,788
Travel		30,446			29,553
Landing and ramp		4,030			4,124
Rent		7,532			8,112
Insurance		2,736			2,548
Other operating expenses		16,773			19,516
		452,513			453,672
OPERATING INCOME		33,004			47,423
OTHER INCOME (EXPENSE)
Interest income		239			215
Non-service component of retiree benefit costs		(1,085	)		(3,218	)
Net gain (loss) on financial instruments		2,355			(1,740	)
Loss from non-consolidated affiliate		(79	)		(406	)
Interest expense		(21,988	)		(15,705	)
		(20,558	)		(20,854	)

EARNINGS FROM CONTINUING OPERATIONS BEFORE INCOME TAXES		12,446			26,569
INCOME TAX EXPENSE		(3,827	)		(6,428	)
EARNINGS FROM CONTINUING OPERATIONS		8,619			20,141
EARNINGS FROM DISCONTINUED OPERATIONS, NET OF TAXES		—			—
NET EARNINGS	$	8,619		$	20,141

BASIC EARNINGS PER SHARE
Continuing operations	$	0.13		$	0.28
Discontinued operations		—			—
TOTAL BASIC EARNINGS PER SHARE	$	0.13		$	0.28

DILUTED EARNINGS PER SHARE
Continuing operations	$	0.13		$	0.25
Discontinued operations		—			—
TOTAL DILUTED EARNINGS PER SHARE	$	0.13		$	0.25

WEIGHTED AVERAGE SHARES
Basic		64,973			71,802
Diluted		67,235			83,057

See notes to unaudited condensed consolidated financial statements.

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AIR TRANSPORT SERVICES GROUP, INC. AND SUBSIDIARIES

UNAUDITED CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME

(In thousands)

	*Three Months Ended*
	*March 31,*
	*2024*			*2023*
NET EARNINGS	$	8,619		$	20,141
OTHER COMPREHENSIVE INCOME:
Defined Benefit Pension		1,984			3,705
Defined Benefit Post-Retirement		(17	)		—

TOTAL COMPREHENSIVE INCOME, net of tax	$	10,586		$	23,846

See notes to unaudited condensed consolidated financial statements.

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AIR TRANSPORT SERVICES GROUP, INC.

UNAUDITED CONDENSED CONSOLIDATED STATEMENTS OF STOCKHOLDERS’ EQUITY

(In thousands, except share data)

												*Accumulated*
							*Additional*					*Other*
	*Common Stock*						*Paid-in*			*Accumulated*		*Comprehensive*
	*Number*			*Amount*			*Capital*			*Earnings*		*Income (Loss)*			*Total*
BALANCE AT DECEMBER 31, 2022		72,327,758		$	723		$	986,303		$	528,882	$	(103,402	)	$	1,412,506
Stock-based compensation plans
Issuance of common shares, net of withholdings		124,152			2			(1,555	)							(1,553	)
Forfeited restricted stock		(300	)		—			—								—
Purchase of common stock		(1,000,000	)		(10	)		(22,127	)							(22,137	)
Amortization of stock awards and restricted stock								1,405								1,405
Total comprehensive income											20,141		3,705			23,846
BALANCE AT MARCH 31, 2023		71,451,610		$	715		$	964,026		$	549,023	$	(99,697	)	$	1,414,067

											*Accumulated*
						*Additional*					*Other*
	*Common Stock*					*Paid-in*			*Accumulated*		*Comprehensive*
	*Number*			*Amount*		*Capital*			*Earnings*		*Income (Loss)*			*Total*
BALANCE AT DECEMBER 31, 2023		65,240,961		$	652	$	836,270		$	589,209	$	(57,429	)	$	1,368,702
Stock-based compensation plans
Grant of restricted stock		427,400			4		(4	)							—
Issuance of common shares, net of withholdings		38,824			1		(464	)							(463	)
Forfeited restricted stock		(4,800	)		—		—								—
Amortization of stock awards and restricted stock							2,600								2,600
Total comprehensive income										8,619		1,967			10,586
BALANCE AT MARCH 31, 2024		65,702,385		$	657	$	838,402		$	597,828	$	(55,462	)	$	1,381,425

See notes to the unaudited condensed consolidated financial statements.

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AIR TRANSPORT SERVICES GROUP, INC. AND SUBSIDIARIES

UNAUDITED CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS

(In thousands)

	*Three Months Ended*
	*March 31,*
	*2024*			*2023*
OPERATING ACTIVITIES:
Net earnings from continuing operations	$	8,619		$	20,141
Adjustments to reconcile net earnings to net cash provided by operating activities:
Depreciation and amortization		94,965			90,936
Pension and post-retirement		2,571			4,745
Deferred income taxes		2,276			4,768
Amortization of stock-based compensation		2,600			1,405
Loss from non-consolidated affiliates		79			406
Net (gain) loss on financial instruments		(2,355	)		1,740
Changes in assets and liabilities:
Accounts receivable		(5,704	)		74,500
Inventory and prepaid supplies		924			(1,361	)
Accounts payable		1,226			13,321
Unearned revenue		518			13,361
Accrued expenses, salaries, wages, benefits and other liabilities		23,311			(4,643	)
Pension and post-retirement balances		(2,437	)		(2,452	)
Other		(173	)		(489	)
NET CASH PROVIDED BY OPERATING ACTIVITIES		126,420			216,378
INVESTING ACTIVITIES:
Expenditures for property and equipment		(102,321	)		(218,801	)
Proceeds from property and equipment		895			9,860
Acquisitions and investments in businesses		(9,800	)		(800	)
NET CASH (USED IN) INVESTING ACTIVITIES		(111,226	)		(209,741	)
FINANCING ACTIVITIES:
Principal payments on long term obligations		(140,105	)		(25,214	)
Proceeds from revolving credit facilities		95,000			105,000
Payments for financing costs		—			(484	)
Purchase of common stock		—			(21,918	)
Withholding taxes paid for conversion of employee stock awards		(463	)		(1,553	)
NET CASH (USED IN) PROVIDED BY FINANCING ACTIVITIES		(45,568	)		55,831

NET INCREASE (DECREASE) IN CASH AND CASH EQUIVALENTS		(30,374	)		62,468
CASH AND CASH EQUIVALENTS AT BEGINNING OF YEAR		53,555			27,134
CASH AND CASH EQUIVALENTS AT END OF YEAR	$	23,181		$	89,602

SUPPLEMENTAL CASH FLOW INFORMATION:
Interest paid, net of amount capitalized	$	31,622		$	11,652
Federal and state income taxes paid	$	28		$	60
Restricted balance of cash	$	11,459		$	1,997
SUPPLEMENTAL NON-CASH INFORMATION:
Accrued expenditures for property and equipment	$	62,653		$	68,338

See notes to unaudited condensed consolidated financial statements.

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AIR TRANSPORT SERVICES GROUP, INC. AND SUBSIDIARIES

NOTES TO UNAUDITED CONDENSED CONSOLIDATED FINANCIAL STATEMENTS

	Page
Note A - Summary of Financial Statement Preparation and Significant Accounting Policies	7
Note B - Goodwill, Intangibles and Equity Investments	9
Note C - Significant Customers	10
Note D - Fair Value Measurements	13
Note E - Property and Equipment	14
Note F - Debt Obligations	14
Note G - Derivative Instruments	17
Note H - Commitments and Contingencies	17
Note I - Pension and Other Post-Retirement Benefit Plans	19
Note J - Income Taxes	20
Note K - Accumulated Other Comprehensive Income (Loss)	21
Note L - Stock-Based Compensation	22
Note M - Common Stock and Earnings Per Share	23
Note N - Segment and Revenue Information	24

NOTE A—SUMMARY OF FINANCIAL STATEMENT PREPARATION AND SIGNIFICANT ACCOUNTING POLICIES

Nature of Operations

ATSG is a holding company whose subsidiaries lease aircraft and provide contracted airline operations as well as other support services mainly to the air transportation, e-commerce and package delivery industries.

The Company's leasing subsidiary, Cargo Aircraft Management, Inc. (“CAM”), leases aircraft to each of the Company's airlines as well as to non-affiliated airlines and other lessees. The Company's airlines, ABX Air, Inc. (“ABX”), Air Transport International, Inc. (“ATI”) and Omni Air International, LLC ("OAI") each have the authority, through their separate U.S. Department of Transportation ("DOT") and Federal Aviation Administration ("FAA") certificates, to transport cargo worldwide. The Company provides a combination of aircraft, crews, maintenance and insurance services for its customers' transportation network through crew, maintenance and insurance ("CMI") agreements and aircraft, crew, maintenance and insurance ("ACMI") agreements and through charter contracts in which aircraft fuel is also included. The Company's subsidiary, LGSTX Services, Inc. ("LGSTX") provides for the management of aircraft ground services.

In addition to its aircraft leasing and airline services, the Company offers a range of complementary services to delivery companies, freight forwarders, airlines and government customers. These include aircraft maintenance and modification services, aircraft parts supply, equipment maintenance services and load transfer and package sorting services.

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Basis of Presentation

The financial statements of the Company are prepared in accordance with accounting principles generally accepted in the United States of America ("GAAP"). The accompanying unaudited condensed interim consolidated financial statements are prepared in conformity with GAAP and such principles are applied on a basis consistent with the financial statements reflected in our 2023 Form 10-K. Certain information and footnote disclosures normally included in financial statements prepared in accordance with GAAP have been condensed or omitted pursuant to the rules and regulations promulgated by the SEC related to interim financial statements. In the opinion of management, the accompanying financial statements contain all adjustments, including normal recurring adjustments, necessary for the fair presentation of the Company's results of operations and financial position for the periods presented. Due to seasonal fluctuations, among other factors common to the air cargo industry, the results of operations for the periods presented are not necessarily indicative of the results of operations to be expected for the entire year or any interim period. The preparation of consolidated financial statements requires management to make estimates and assumptions that affect amounts reported in the consolidated financial statements. The accounting estimates reflect the best judgment of the management, but actual results could differ materially from those estimates.

The accompanying unaudited condensed consolidated financial statements include the accounts of ATSG and its wholly-owned subsidiaries. Inter-company balances and transactions are eliminated. Investments in affiliates in which the Company has significant influence but does not exercise control are accounted for using the equity method of accounting. Under the equity method, the Company's share of the non-consolidated affiliate's income or loss is recognized in the consolidated statement of earnings and cumulative post-acquisition changes in the investment are adjusted against the carrying amount of the investment.

Accounting Standards Updates

In November 2023, the FASB issued ASU No. 2023-07, "Segment Reporting (Topic 280): Improvements to Reportable Segment Disclosures." This standard requires disclosure of significant segment expenses and other segment items by reportable segment. This ASU becomes effective for annual periods beginning in 2024 and interim periods in 2025. The Company is assessing the impact of this ASU and upon adoption expects that any impact would be limited to additional segment expense disclosures in the footnotes to its consolidated financial statements.

In December 2023, the FASB issued ASU No. 2023-09, "Income Taxes (Topic 740): Improvements to Income Tax Disclosures." This standard enhances disclosures related to income taxes, including the rate reconciliation and information on income taxes paid. This ASU becomes effective January 1, 2025. The Company is assessing the impact of this ASU and upon adoption expects to include certain additional disclosures in the footnotes to its consolidated financial statements.

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NOTE B—GOODWILL, INTANGIBLES AND EQUITY INVESTMENTS

The carrying amounts of goodwill by reportable segment are as follows (in thousands):

	*CAM*		*ACMI Services*		*All Other*		*Total*
Carrying value as of December 31, 2023	$	153,290	$	234,571	$	8,113	$	395,974
Carrying value as of March 31, 2024	$	153,290	$	234,571	$	8,113	$	395,974

The Company's acquired intangible assets are as follows (in thousands):

	*Airline*		*Amortizing*
	*Certificates*		*Intangibles*			*Total*
Carrying value as of December 31, 2023	$	9,000	$	77,453		$	86,453
Amortization		—		(2,553	)		(2,553	)
Carrying value as of March 31, 2024	$	9,000	$	74,900		$	83,900

The airline certificates have an indefinite life and therefore are not amortized. The Company amortizes finite-lived intangible assets, including customer relationship and Supplemental Type Certificates ("STC") intangibles, over 2 to 15 remaining years.

Stock warrants issued to Amazon.com, Inc. (“Amazon”) (see Note C) as an incentive for a subsidiary of Amazon to lease aircraft from the Company are recorded as a lease incentive asset using their fair value at the time that the lessee has met its performance obligations and amortized against revenues over the duration of related aircraft leases. The Company's lease incentive granted to the lessee was as follows (in thousands):

	*Lease*
	*Incentive*
Carrying value as of December 31, 2023	$	60,961
Amortization		(3,912	)
Carrying value as of March 31, 2024	$	57,049

The Company has a 49% ownership in a joint-venture agreement with Precision Aircraft Solutions, LLC, to develop a passenger-to-freighter conversion program for Airbus A321-200 aircraft. In April 2022, the Company acquired a 40% ownership interest in the joint-venture company GA Telesis Engine Services, LLC to provide engine tear-down services to harvest and sell engine parts. The Company accounts for its investment in these joint ventures under the equity method of accounting, in which the carrying value of each investment is reduced for the Company's share of the non-consolidated affiliates' operating results.

The carrying value of the joint ventures totaled $32.4 million and $22.7 million at March 31, 2024 and December 31, 2023, respectively, and are reflected in “Other Assets” in the Company’s consolidated balance sheets. The Company monitors its investments in affiliates for indicators of other-than-temporary declines in value on an ongoing basis in accordance with GAAP. If the Company determines that an other-than-temporary decline in value has occurred, it recognizes an impairment loss, which is measured as the difference between the recorded carrying value and the fair value of the investment. The fair value is generally determined using an income approach based on discounted cash flows or using negotiated transaction values.

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NOTE C—SIGNIFICANT CUSTOMERS

Three customers each account for a significant portion of the Company's consolidated revenues. The percentage of the Company's revenues for the Company's three largest customers, for the three month period ended March 31, 2024 and 2023 are as follows:

	*Three Months Ended*
	*March 31,*
	*2024*			*2023*
Customer	*Percentage of Revenue*
DoD		28	%		29	%
Amazon		34	%		35	%
DHL		13	%		14	%

The accounts receivable from the Company's three largest customers as of March 31, 2024 and December 31, 2023 are as follows (in thousands):

	*March 31, 2024*		*December 31, 2023*
Customer	*Accounts Receivable*
DoD	$	64,050	$	56,848
Amazon		83,209		74,509
DHL		9,777		8,040

DoD

The Company is a provider of cargo and passenger airlift services to the U.S. Department of Defense ("DoD"). The Company's airlines are eligible to bid for military charter operations for passenger and cargo transportation through contracts awarded by the DoD. The airlines draw from the Company's fleet of Boeing 757 combi, Boeing 777 passenger, Boeing 767 passenger and Boeing 767 freighter aircraft for the DoD operations. The DoD awards flights to U.S. certificated airlines through annual contracts and through temporary "expansion" routes.

DHL

The Company has had long-term contracts with DHL Network Operations (USA), Inc. and its affiliates ("DHL") since August 2003. The Company leases Boeing 767 aircraft to DHL under both long-term and short-term lease agreements. Under a separate CMI agreement, the Company operates Boeing 767 aircraft that DHL leases from the Company. Pricing for services provided through the CMI agreement is based on pre-defined fees, scaled for the number of aircraft operated and the number of flight crews provided to DHL for its U.S. network. The Company provides DHL with scheduled maintenance services for aircraft that DHL leases. The Company also provides additional air cargo transportation services for DHL through ACMI agreements in which the Company provides the aircraft, crews, maintenance and insurance under a single contract. As of March 31, 2024, the Company leased 14 Boeing 767 freighter aircraft to DHL comprised of one Boeing 767-200 aircraft and 13 Boeing 767-300 aircraft, with expirations between 2025 and 2031. Further, beginning in third quarter of 2022, the Company began to operate four Boeing 767 aircraft provided by DHL under an additional CMI agreement which currently runs through August 2027.

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Amazon

The Company has been providing freighter aircraft, airline operations and services for cargo handling and logistical support for Amazon.com Services, LLC, ("ASI") a subsidiary of Amazon, since September 2015. On March 8, 2016, the Company entered into an Air Transportation Services Agreement (the “ATSA”) with ASI, pursuant to which CAM leases Boeing 767 freighter aircraft to ASI. The ATSA also provides for the operation of aircraft by the Company’s airline subsidiaries, and the management of ground services by LGSTX. As of March 31, 2024, the Company leased 34 Boeing 767 freighter aircraft to ASI with lease expirations between 2024 and 2031.

Amazon Investment Agreement

On December 22, 2018, the Company entered into an Amended and Restated Air Transportation Services Agreement ("A&R ATSA") with ASI, pursuant to which the Company, through CAM and its airline subsidiaries, agreed to (1) lease and operate ten additional Boeing 767-300 aircraft for ASI under the A&R ATSA, (2) extend the term of the 12 Boeing 767-200 aircraft then leased to ASI by two years to 2023 with an option for three more years, (3) extend the term of the eight Boeing 767-300 aircraft currently leased to ASI by three years to 2026 and 2027 with an option for three more years, and (4) extend the ATSA by five years through March 2026, with an option to extend for an additional three years. The Company leased all ten of the 767-300 aircraft in 2020. In conjunction with the commitment to lease ten additional Boeing 767-300 aircraft, extend the duration of 20 existing Boeing 767 aircraft leases and the ATSA described above, Amazon and the Company entered into an Investment Agreement on December 20, 2018 (the "2018 Investment Agreement"). Pursuant to the 2018 Investment Agreement, the Company issued to Amazon warrants for 14.8 million common shares of ATSG, all of which have vested. The warrants have an exercise price of $21.53 per share. On May 6, 2024, this group of warrants was modified to extend their expiration date from December 2025 to December of 2029 in conjunction with the 3rd A&R ATSA described and defined below.

On May 29, 2020, the Company entered into a Second Amended and Restated Air Transportation Services Agreement (the "2nd A&R ATSA") with ASI, pursuant to which the Company agreed to lease 12 more Boeing 767-300 aircraft to ASI for operation by the Company's airline subsidiaries under the 2nd A&R ATSA. The first of these leases began in the second quarter of 2020 with the remaining eleven delivered in 2021. All 12 of these aircraft leases were for ten-year terms. Pursuant to the 2018 Investment Agreement, as a result of leasing 12 aircraft, Amazon was issued warrants for 7.0 million common shares, all of which have vested. The exercise price of these warrants is $20.40 per share. On May 6, 2024, this group of warrants was modified to extend their expiration date from December 2025 to December of 2029 in conjunction with the 3rd A&R ATSA described below under subsequent event.

Issued and outstanding warrants are summarized below as of March 31, 2024:

			*Common Shares in millions*
	*Exercise price*		*Vested*		*Non-Vested*		*Expiration*

2018 Investment Agreement	$	21.53		14.8		0.0	December 20, 2025
2018 Investment Agreement	$	20.40		7.0		0.0	December 20, 2025

Prior to May 6, 2024 Amazon could earn additional warrants for up to 2.9 million common shares under the 2018 Investment Agreement by leasing up to five more cargo aircraft from the Company before January 2026. Incremental warrants granted for ASI’s commitment to any such future aircraft leases would have had an exercise price based on the volume-weighted average price of the Company's shares during the 30 trading days immediately preceding the contractual commitment for each lease. This right to earn warrants was replaced on May 6, 2024 as noted below.

For all outstanding warrants vested, Amazon may select a cashless conversion option. Assuming ATSG's stock price at the time of conversion is above the warrant exercise price, Amazon would receive fewer shares in exchange for any warrants exercised under the cashless option by surrendering the number of shares with a market value equal to the exercise price.

The Company resumed repurchases of its own shares during October 2022 in conjunction with the expiration of certain government restrictions stemming from the Coronavirus Aid, Relief and Economic Security Act. As the Company repurchases its own shares, Amazon has the option to sell shares of ATSG's common stock to the Company to maintain its ownership percentage of less than 19.9% of the Company's outstanding shares pursuant to the terms of an Investment Agreement dated March 8, 2016, as amended. On August 14, 2023 Amazon sold 1,177,000 shares of ATSG common stock back to the Company for cash of $22.9 million. These transactions resulted in Amazon maintaining its ownership percentage of less than 19.9% of ATSG's outstanding common shares at the time.

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As of March 31, 2024 and December 31, 2023, the Company's liabilities reflected warrants and Amazon sale options from the 2018 Amazon agreements having a fair value of $1.6 million and $1.7 million, respectively. During the three month period ended March 31, 2024, the re-measurements of warrants and sale options to fair value resulted in net non-operating gains of $0.1 million compared to net non-operating losses of $0.8 million in the corresponding period in 2023.

Subsequent Event

On May 6, 2024, the Company entered into a Third Amended and Restated Air Transportation Services Agreement with ASI (the "3rd A&R ATSA") pursuant to which the Company, through its subsidiary air carriers, will sublease and operate ten additional Boeing 767-300 freighter aircraft to be provided by ASI, with the potential to add up to ten additional Boeing 767-300 freighter aircraft. The Company's subsidiary air carriers are scheduled to begin operating the first of those ten aircraft in June of this year with the remaining aircraft being delivered through November of this year. The initial term of the 3rd A&R ATSA runs through May 6, 2029, and may be extended by the parties for an additional five years subject to mutual agreement. In conjunction with the execution of the 3rd A&R ATSA, the Company issued warrants to Amazon for up to 2.9 million common shares of ATSG (the “2024 Subsequent Warrant”). The 2024 Subsequent Warrant vests in four equal tranches of 728,750 shares of ATSG common stock on its issue date and each of the first three anniversaries thereof; provided that, for each of the second, third and fourth tranches, Amazon has compensated ATSG for a certain number of flight hours in a specified period immediately preceding such anniversary. The 2024 Subsequent Warrant has a term of seven years, and the exercise price is $12.96 per share of ATSG common stock. As partial consideration for the 3rd A&R ATSA, the 2024 Subsequent Warrant was issued to replace Amazon’s prior warrant right under the 2018 Investment Agreement for 2.9 million common shares related to aircraft leases commitments.

Also on May 6, 2024, in conjunction with the execution of the 3rd A&R ATSA, the Company and Amazon agreed upon the form of the warrant to be issued to purchase up to 2.9 million additional common shares (the “Third Subsequent Warrant”). The Third Subsequent Warrant will be issued by the Company upon the earlier of the first anniversary of the 3^rd A&R ATSA and the date upon which the Company begins providing services to Amazon with the tenth aircraft to be placed into service by Amazon pursuant to the 3rd A&R ATSA. The Third Subsequent Warrant will vest in (i) one tranche of 291,500 shares of ATSG common stock upon Amazon’s entry into each aircraft lease extension with ATSG for at least three years, and (ii) four equal tranches of 72,875 shares of ATSG common stock upon each placement by Amazon of additional aircraft into service with ATSG (i.e., aircraft beyond the tenth aircraft, up to a maximum of ten additional aircraft), with the first tranche vesting with the placement of the aircraft into service and the remaining tranches vesting on each of the first three anniversaries thereof; provided that, for each of the second, third and fourth tranches, Amazon has compensated ATSG for a certain number of flight hours in a specified period immediately preceding such anniversary plus a certain number of flight hours per additional aircraft placed into service during such specified period. The Third Subsequent Warrant will have a term of seven years and the exercise price per share of ATSG common stock will be the volume weighted average price of ATSG's common stock for the 30 trading days preceding the warrant issue date.

Additionally, on May 6, 2024, the expiration dates for the two existing vested warrants totaling 21.8 million shares (the warrants issued on December 20, 2018 for 14.8 million shares and the warrants issued on May 29, 2020, for 7.0 million shares) issued pursuant to the 2018 Investment Agreement, were extended from December 2025 to December of 2029.

The Company's accounting for warrants issued to a customer is determined in accordance with the financial reporting guidance for equity-based payments to non-employees and for financial instruments. Generally, warrants issued to a customer are recorded as an incentive asset using their fair value at the time of issuance if it is probable of vesting at the time of grant. The incentive is amortized against revenues over the duration of related flight operations and leases. The Company's earnings in future periods will be impacted by the re-measurements of warrant fair value, amortizations of the incentive and the related income tax effects. For income tax calculations, the value and timing of related tax deductions may differ from that used for financial reporting.

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NOTE D—FAIR VALUE MEASUREMENTS

The Company’s money market funds and interest rate swaps are reported on the Company’s consolidated balance sheets at fair values based on market values from comparable transactions. The fair value of the Company’s money market funds, Convertible Notes (as defined in Note F), convertible note hedges and interest rate swaps are based on observable inputs (Level 2) from comparable market transactions.

The fair values of the stock warrant obligations to Amazon resulting from aircraft leased to ASI were determined using a Black-Scholes pricing model which considers various assumptions, including ATSG's common stock price, the volatility of ATSG's common stock, the expected dividend yield, exercise price and the risk-free interest rate (Level 2 inputs). The fair value of the stock warrant obligations for unvested stock warrants, conditionally granted to Amazon for the execution of incremental, future aircraft leases, include additional assumptions including the expected exercise prices and the probabilities that future leases will occur (Level 3 inputs). The fair value of the sale option for Amazon to sell back shares to the Company under certain conditions was determined based on future share repurchase scenarios. Judgement was applied to determine the number of shares that would be repurchased by the Company at a certain price and the probability of each scenario. There is uncertainty regarding the future stock price at the time of repurchase which affects the magnitude of the gain or loss recognized (Level 3 inputs).

The following table reflects assets and liabilities that are measured at fair value on a recurring basis (in thousands):

As of March 31, 2024	*Fair Value Measurement Using*
	*Level 1*		*Level 2*		*Level 3*			*Total*
Assets
Cash equivalents—money market	$	—	$	1,318	$	—		$	1,318
Interest rate swap		—		1,723		—			1,723
Total Assets	$	—	$	3,041	$	—		$	3,041
Liabilities
Sale option		—		—		(1,258	)		(1,258	)
Stock warrant obligations		—		—		(368	)		(368	)
Total Liabilities	$	—	$	—	$	(1,626	)	$	(1,626	)

As of December 31, 2023	*Fair Value Measurement Using*
	*Level 1*		*Level 2*			*Level 3*			*Total*
Assets
Cash equivalents—money market	$	—	$	1,248		$	—		$	1,248
Interest rate swap		—		—			—			—
Total Assets	$	—	$	1,248		$	—		$	1,248
Liabilities
Interest rate swap		—		(529	)		—			(529	)
Sale Option		—		—			(1,258	)		(1,258	)
Stock warrant obligations		—		—			(471	)		(471	)
Total Liabilities	$	—	$	(529	)	$	(1,729	)	$	(2,258	)

As a result of higher market interest rates compared to the stated interest rates of the Company’s fixed rate debt obligations, the fair value of the Company’s debt obligations, based on Level 2 observable inputs, was approximately $126.6 million less than the carrying value, which was $1,717.8 million at March 31, 2024. As of December 31, 2023, the fair value of the Company’s debt obligations was approximately $97.6 million less than the carrying value, which was $1,762.3 million. The non-financial assets, including goodwill, intangible assets and property and equipment are measured at fair value on a non-recurring basis.

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NOTE E—PROPERTY AND EQUIPMENT

The Company's property and equipment consists primarily of cargo aircraft, aircraft engines and other flight equipment. Property and equipment, to be held and used, is summarized as follows (in thousands):

	*March 31,*			*December 31,*
	*2024*			*2023*
Flight equipment	$	4,055,379		$	3,865,049
Ground equipment		72,653			72,463
Leasehold improvements, facilities and office equipment		43,659			42,120
Aircraft modifications and projects in progress		551,630			638,631
		4,723,321			4,618,263
Accumulated depreciation		(1,856,986	)		(1,797,494	)
Property and equipment, net	$	2,866,335		$	2,820,769

CAM owned aircraft with a carrying value of $1,715.4 million and $1,640.9 million that were under lease to external customers as of March 31, 2024 and December 31, 2023, respectively.

NOTE F—DEBT OBLIGATIONS

Debt obligations consisted of the following (in thousands):

	*March 31, 2024*			*December 31, 2023*
Revolving credit facility		685,000			730,000
Senior notes		578,694			578,574
Convertible notes		444,897			444,420
Other financing arrangements		9,183			9,288
Total debt obligations		1,717,774			1,762,282
Less: current portion		(54,768	)		(54,710	)
Total long term obligations, net	$	1,663,006		$	1,707,572

The Company is a party to a syndicated credit agreement (as amended, the "Senior Credit Agreement") which includes the ability to execute term loans and a revolving credit facility. The Senior Credit Agreement includes a revolving credit facility of up to $1 billion, has a maturity date of October 19, 2027, requires a collateral to outstanding loan ratio of 1.25:1:00 and permits cash dividends and share repurchases provided the secured leverage ratio is less than 3.00 to 1.00 and the total leverage ratio is less than 3.50 to 1.00. The interest rate under the Senior Credit Agreement is a pricing premium added to SOFR based upon the ratio of the Company's debt to its earnings before interest, taxes, depreciation and amortization expenses ("EBITDA") as defined under the Senior Credit Agreement. Under the terms of the Senior Credit Agreement, interest rates are adjusted at least quarterly based on the Company's EBITDA, its outstanding debt level and prevailing SOFR or prime rates. At the Company's debt-to-EBITDA ratio as of March 31, 2024, the SOFR-based financing for the revolving credit facility bears a variable interest rate of 6.68%. As of March 31, 2024, the unused revolving credit facility available to the Company at the trailing twelve-month EBITDA level was $403.7 million, and additional permitted indebtedness under the Senior Credit Agreement subject to compliance with other covenants.

The Senior Credit Agreement is collateralized by certain of the Company's Boeing 777, 767 and 757 aircraft. Under the terms of the Senior Credit Agreement, the Company is required to maintain certain collateral coverage ratios set forth in the Senior Credit Agreement. The Senior Credit Agreement contains covenants, including a maximum permitted total EBITDA to debt ratio, a fixed charge covenant ratio requirement, and limitations on certain additional indebtedness and on guarantees of indebtedness. The Senior Credit Agreement stipulates events of default, including unspecified events that may have material adverse effects on the Company. If an event of default occurs, the Company may be forced to repay, renegotiate or replace the Senior Credit Agreement. The Company has an additional revolving credit facility domiciled in Ireland (the "Irish Facility"). The terms and conditions of the Irish Facility are similar to the Senior Credit Agreement in the U.S. The Irish Facility has a maximum capacity of $100.0 million, including a $7.5 million letter of credit sub-facility, and has the ability to be upsized using the same accordion feature that is present in the Senior Credit Agreement. The maturity date of the Irish Facility is the same as the Senior Credit Agreement.

On August 14, 2023 the Company issued $400.0 million aggregate principal amount of Convertible Senior Notes due 2029 ("2023 Convertible Notes"). These notes were issued in a private offering to qualified institutional buyers pursuant to Rule 144A under the Securities Act of 1933, as amended (the "1933 Act"). The 2023 Convertible Notes bear interest at a rate of 3.875% per year payable semi-annually in arrears on February 15 and August 15 each year, beginning February 15, 2024. The 2023 Convertible Notes mature on August 15, 2029, unless repurchased or converted in accordance with their terms prior to such date. The 2023 Convertible Notes are unsecured indebtedness, subordinated to the Company's existing and future secured indebtedness and other liabilities, including trade payables.

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Conversion of the 2023 Convertible Notes can only occur upon satisfaction of certain conditions and during certain periods, beginning any calendar quarter commencing after December 31, 2023 and thereafter, until the close of business on the second scheduled trading day immediately preceding the maturity date. The Company will settle the principal value of the notes in cash. The initial conversion rate is $31.2864 common shares per $1,000 principal amount of 2023 Convertible Notes (equivalent to an initial conversion price of approximately $31.28 per common share). If a “make-whole fundamental change” (as defined in the offering circular with the 2023 Convertible Notes) occurs, ATSG will, in certain circumstances, increase the conversion rate for a specified period of time. Upon the occurrence of certain fundamental changes, holders of the Convertible Notes can require the Company to repurchase their notes for a cash repurchase price equal to the principal amount of the notes, plus any accrued and unpaid interest.

The Company used a portion of the proceeds from the 2023 Convertible Notes to repurchase 5,435,777 shares of its common stock concurrently with offering of the 2023 Convertible Notes. Additionally, the Company used a portion of the proceeds to repurchase $204.5 million principal amount of its outstanding 1.125% Convertible Senior Notes issued in 2017 (the “2017 Convertible Notes”). The Company used the remainder of the proceeds from the offering to satisfy fees and expenses associated with the offering, to repay a portion of the outstanding borrowings under its revolving credit facility and for general corporate purposes.

On January 28, 2020, CAM completed a debt offering of $500.0 million in senior unsecured notes (the “Senior Notes”) that were guaranteed by ATSG and certain of its other subsidiaries. The Senior Notes were sold only to qualified institutional buyers in the United States pursuant to Rule 144A under the the 1933 Act, and certain investors pursuant to Regulation S under the 1933 Act. The Senior Notes are senior unsecured obligations that bear interest at a fixed rate of 4.75% per year, payable semiannually in arrears on February 1 and August 1 of each year, beginning on August 1, 2020. The Senior Notes will mature on February 1, 2028. The Senior Notes contain customary events of default and certain covenants which are generally no more restrictive than those set forth in the Senior Credit Agreement. On April 13, 2021, the Company, through a subsidiary, completed its offering of $200.0 million of additional notes ("Additional Senior Notes") under the existing Senior Notes. The Additional Senior Notes are fully fungible with the Senior Notes, treated as a single class for all purposes under the indenture governing the existing notes with the same terms as those of the existing notes (other than issue date and issue price). The proceeds of $205.5 million, net of scheduled interest payable, were issued, in conjunction with draws from the revolving credit facility to repay the unsubordinated term loans. Upon retirement of the unsubordinated term loans, the Company expensed debt issuance costs of $6.5 million related to the unsubordinated term loans.

The balance of the Senior Notes is net of debt issuance costs of $4.0 million and $4.3 million as of March 31, 2024 and December 31, 2023, respectively. The Senior Notes do not require principal payments until maturity but prepayments are allowed without penalty beginning February 1, 2025.

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In September 2017, ATSG issued $258.8 million aggregate principal amount of 1.125% Convertible Senior Notes due 2024 (the 2017 Convertible Notes) in a private offering to qualified institutional buyers pursuant to Rule 144A under the 1933 Act. The 2017 Convertible Notes bear interest at a rate of 1.125% per year payable semi-annually in arrears on April 15 and October 15 each year, beginning April 15, 2018. The 2017 Convertible Notes mature on October 15, 2024, unless repurchased or converted in accordance with their terms prior to such date. The 2017 Convertible Notes are unsecured indebtedness, subordinated to the Company's existing and future secured indebtedness and other liabilities, including trade payables. Conversion of the 2017 Convertible Notes can only occur upon satisfaction of certain conditions and during certain periods, beginning any calendar quarter commencing after December 31, 2017 and thereafter, until the close of business on the second scheduled trading day immediately preceding the maturity date. Upon the occurrence of certain fundamental changes, holders of the 2017 Convertible Notes can require the Company to repurchase their notes for a cash repurchase price equal to the principal amount of the notes, plus any accrued and unpaid interest.

ATSG has the right to settle the 2017 Convertible Notes in cash, ATSG common shares or a combination of cash and ATSG common shares. The initial conversion rate is 31.3475 common shares per $1,000 principal amount of 2017 Convertible Notes (equivalent to an initial conversion price of approximately $31.90 per common share). If a “make-whole fundamental change” (as defined in the offering circular with the Convertible Notes) occurs, ATSG will, in certain circumstances, increase the conversion rate for a specified period of time.

In conjunction with the 2017 Convertible Notes, the Company purchased convertible note hedges under privately negotiated transactions for $56.1 million, having the same number of ATSG common shares (8.1 million shares at that time) and same strike price ($31.90) that underlie the 2017 Convertible Notes. The convertible note hedges are expected to reduce the potential equity dilution with respect to ATSG's common shares, and/or offset any cash payments in excess of the principal amount due, as the case may be, upon conversion of the 2017 Convertible Notes. The Company's current intent and policy is to settle all Note conversions through a combination settlement which satisfies the principal amount of the 2017 Convertible Notes outstanding with cash.

The carrying value of the Company's convertible debt is shown below (in thousands):

	*2017 Convertible Notes*			*2023 Convertible Notes*			*Total Convertible Notes*
Principal Value December 31, 2023		54,225			400,000			454,225
Unamortized issuance cost		(110	)		(9,218	)		(9,328	)
Convertible Debt March 31, 2024		54,115			390,782			444,897

In conjunction with the offering of the 2017 Convertible Notes, the Company also sold warrants to the convertible note hedge counterparties in separate, privately negotiated warrant transactions at a higher strike price and for the same number of the Company’s common shares, subject to customary anti-dilution adjustments.

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On August 14, 2023, the Company repurchased outstanding 2017 Convertible Notes having a principal value of $204.5 million in the open market, reducing the 2017 Convertible Notes carrying value to $54.2 million. The Company recognized a net pre-tax gain of $1.3 million, net of fees, which was recorded under net gain of financial instruments on the income statement during the corresponding period. In conjunction with the repurchase of the 2017 Convertible Notes the Company settled a pro-rata portion of the related warrants and note hedges and received $1.3 million in net cash proceeds. The share quantity of the convertible note hedges and warrants were 1.7 million shares, respectively at March 31, 2024.

NOTE G—DERIVATIVE INSTRUMENTS

The Company maintains derivative instruments for protection from fluctuating interest rates. The table below provides information about the Company’s interest rate swaps (in thousands):

				*March 31, 2024*				*December 31, 2023*
	*Stated*					*Market*				*Market*
	*Interest*			*Notional*		*Value*		*Notional*		*Value*
Expiration Date	*Rate*			*Amount*		*(Liability)*		*Amount*		*(Liability)*
March 31, 2026		3.793	%		50,000		665		50,000		237
March 31, 2026		3.836	%		50,000		700		50,000		189
June 30, 2026		4.257	%		50,000		116		50,000		(525	)
June 30, 2026		4.185	%		50,000		242		50,000		(430	)

The outstanding interest rate swaps are not designated as hedges for accounting purposes. The effects of future fluctuations in SOFR interest rates on derivatives held by the Company will result in the recording of unrealized gains and losses into the statement of operations. The Company recorded pre-tax gains on derivatives of $2.3 million for the three month period ended March 31, 2024 compared to a pre-tax loss of $0.9 million for the corresponding period in 2023. The liability for outstanding derivatives is recorded in other liabilities and in accrued expenses.

NOTE H—COMMITMENTS AND CONTINGENCIES

Lease Commitments

The Company leases property, aircraft, aircraft engines and other types of equipment under operating leases. The Company's airlines operate 16 freighter aircraft provided by customers and five passenger aircraft leased from external companies. Property leases include hangars, warehouses, offices and other space at certain airports with fixed rent payments and lease terms ranging from one month to nine years. The Company is obligated to pay the lessor for maintenance, real estate taxes, insurance and other operating expenses on certain property leases. These expenses are variable and are not included in the measurement of the lease asset or lease liability. These expenses are recognized as variable lease expense when incurred and are not material. Equipment leases include ground support and industrial equipment as well as computer hardware with fixed rent payments and terms of one month to five years.

The Company records the initial right-to-use asset and lease liability at the present value of lease payments scheduled during the lease term. For the three months ended March 31, 2024 and 2023, non-cash transactions to recognize right-to-use assets and corresponding liabilities for new leases were $0.5 million and $0.4 million, respectively. Unless the rate implicit in the lease is readily determinable, the Company discounts the lease payments using an estimated incremental borrowing rate at the time of lease commencement. The Company estimates the incremental borrowing rate based on the information available at the lease commencement date, including the rate the Company could borrow for a similar amount, over a similar lease term with similar collateral. The Company's weighted-average discount rate for operating leases at March 31, 2024 and December 31, 2023 was 4.1% and 4.0%, respectively. Leases often include rental escalation clauses, renewal options and/or termination options that are factored into the determination of lease payments when appropriate. Although not material, the amount of such options is reflected below in the maturity of operating lease liabilities table. Lease expense is recognized on a straight-line basis over the lease term. Our weighted-average remaining lease term is 3.8 years and 3.9 years as of March 31, 2024 and December 31, 2023, respectively.

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For the three months ended March 31, 2024 and 2023, cash payments against operating lease liabilities were $5.9 million and $6.6 million, respectively. As of March 31, 2024, the maturities of operating lease liabilities are as follows (in thousands):

	*Operating Leases*
2024	$	16,115
2025		15,659
2026		8,962
2027		4,673
2028		3,526
2029 and beyond		5,730
Total undiscounted cash payments		54,665
Less: amount representing interest		(4,468	)
Present value of future minimum lease payments		50,197
Less: current obligations under leases		18,947
Long-term lease obligation	$	31,250

Purchase Commitments

The Company has agreements with vendors for the conversion of Boeing 767-300, Airbus A321 and Airbus A330 passenger aircraft into a standard configured freighter aircraft. The conversions primarily consist of the installation of a standard cargo door and loading system. As of March 31, 2024, the Company owned thirteen Boeing 767-300 aircraft, six Airbus A321-200 aircraft and five Airbus A330 aircraft that were in or awaiting the modification process. As of March 31, 2024, the Company has agreements to purchase three more Boeing 767-300 aircraft and five Airbus A330-300 passenger aircraft through 2025. As of March 31, 2024, the Company's commitments to acquire aircraft and convert these aircraft totaled $478.1 million, including estimated payments of $116.7 million through the remainder of 2024 and the remaining payments through 2026. Actual conversion payments will be based on the achievement of progress milestones. The Company also has access to 20 additional slots for aircraft modifications with inductions between 2025 and the end of 2027. The Company's costs related to such aircraft modifications could vary based on the Company's election to utilize the modification slot, the timing of such election, the aircraft type and the vendor.

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Guarantees and Indemnifications

Certain leases and agreements of the Company contain guarantees and indemnification obligations to the lessor, or one or more other parties that are considered reasonable and customary (e.g., use, tax and environmental indemnifications), the terms of which range in duration and are often limited. Such indemnification obligations may continue after expiration of the respective lease or agreement.

Other

In addition to the foregoing matters, the Company is also a party to legal proceedings in various federal and state jurisdictions from time to time arising out of the operation of the Company's business. The amount of alleged liability, if any, from these proceedings cannot be determined with certainty; however, the Company believes that its ultimate liability, if any, arising from pending legal proceedings, as well as from asserted legal claims and known potential legal claims which are probable of assertion, taking into account established accruals for estimated liabilities, should not be material to its financial condition or results of operations.

Employees Under Collective Bargaining Agreements

As of March 31, 2024, the flight crewmember employees of ABX, ATI and OAI and flight attendant employees of ATI and OAI were represented by the labor unions listed below:

		*Percentage of*
		*the Company’s*
Airline	*Labor Agreement Unit*	*Employees*
ABX	International Brotherhood of Teamsters	5.1	%
ATI	Air Line Pilots Association	11.7	%
OAI	International Brotherhood of Teamsters	6.4	%
ATI	Association of Flight Attendants	0.8	%
OAI	Association of Flight Attendants	6.6	%

In addition, OAI has less than 20 flight dispatchers that are represented by a recognized labor unit and are beginning to negotiate a collective bargaining agreement.

NOTE I—PENSION AND OTHER POST-RETIREMENT BENEFIT PLANS

Defined Benefit and Post-retirement Healthcare Plans

ABX sponsors a qualified defined benefit pension plan for ABX crewmembers and a qualified defined benefit pension plan for a major portion of its ABX employees that meet minimum eligibility requirements. ABX also sponsors non-qualified defined benefit pension plans for certain employees. These non-qualified plans are unfunded. Employees are no longer accruing benefits under any of the defined benefit pension plans. ABX also sponsors a post-retirement healthcare plan for its ABX crewmembers, which is unfunded. Benefits for covered individuals terminate upon reaching age 65 under the post-retirement healthcare plans.

The accounting and valuation for these post-retirement obligations are determined by prescribed accounting and actuarial methods that consider a number of assumptions and estimates. The selection of appropriate assumptions and estimates is significant due to the long time period over which benefits will be accrued and paid. The long term nature of these benefit payouts increases the sensitivity of certain estimates of our post-retirement obligations. The assumptions considered most sensitive in actuarially valuing ABX’s pension obligations and determining related expense amounts are discount rates and expected long term investment returns on plan assets. Additionally, other assumptions concerning retirement ages, mortality and employee turnover also affect the valuations. Actual results and future changes in these assumptions could result in future costs significantly higher than those recorded in our results of operations.

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ABX measures plan assets and benefit obligations as of December 31 of each year. Information regarding ABX's sponsored defined benefit pension plans and post-retirement healthcare plans follows below. The accumulated benefit obligation reflects pension benefit obligations based on the actual earnings and service to-date of current employees.

ABX’s net periodic benefit costs for its defined benefit pension plans and post-retirement healthcare plans for the three month periods ended March 31, 2024 and 2023 are as follows (in thousands):

	*Three Months Ended March 31,*
	*Pension Plans*						*Post-Retirement Healthcare Plan*
	*2024*			*2023*			*2024*			*2023*
Service cost	$	—		$	—		$	5		$	13
Interest cost		6,614			8,631			23			33
Expected return on plan assets		(8,122	)		(10,192	)		—			—
Amortization of net loss		2,594			4,745			(23	)		—
Net periodic benefit cost (income)	$	1,086		$	3,184		$	5		$	46

During the three month period ended March 31, 2024, the Company made contributions to the pension plans of $0.9 million. The Company expects to contribute an additional $0.5 million during the remainder of 2024.

NOTE J—INCOME TAXES

The provision for income taxes for interim periods is based on management's best estimate of the effective income tax rate expected to be applicable for the current year, plus any adjustments arising from changes in the estimated amount of taxable income related to prior periods. Income taxes recorded through March 31, 2024 have been estimated utilizing a rate of 29% based upon year-to-date income and projected results for the full year. The recognition of discrete tax items, such as the conversion of employee stock awards, the issuance of stock warrants and other items as well as our leasing efforts with our Irish subsidiary, have an impact on the effective rate during a period.

As a result of these differences in which expenses and benefits for tax purposes are different than required by GAAP, the Company's effective tax rate for the three months ended March 31, 2024 was 31%. The final effective tax rate for the year 2024 will depend on the actual amount of pre-tax book results by the Company for the full year, the additional conversions of employee stock awards, executive compensation and other items.

The Company has operating loss carryforwards for U.S. federal income tax purposes. Management expects to utilize the loss carryforwards to offset federal income tax liabilities in the future. Due to the Company's deferred tax assets, including its loss carryforwards, cash payments for income taxes will be limited through 2025. The Company is required to pay some federal tax due to loss carryforward usage limitations and certain state and local income taxes.

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NOTE K—ACCUMULATED OTHER COMPREHENSIVE INCOME (LOSS)

Accumulated other comprehensive income (loss) includes the following items by components for the three month periods ended March 31, 2024 and 2023 (in thousands):

	*Defined Benefit*			*Defined Benefit*			*Foreign Currency*
	*Pension*			*Post-Retirement*			*Translation*			*Total*
Balance as of January 1, 2023	$	(103,418	)	$	36		$	(20	)	$	(103,402	)
Amounts reclassified from accumulated other comprehensive income:
Actuarial costs (reclassified to salaries, wages and benefits)		4,745			—			—			4,745
Income Tax (Expense) or Benefit		(1,040	)		—			—			(1,040	)
Other comprehensive income (loss), net of tax		3,705			—			—			3,705
Balance as of March 31, 2023	$	(99,713	)	$	36		$	(20	)	$	(99,697	)
Balance as of January 1, 2024	$	(57,931	)	$	502		$	—		$	(57,429	)
Amounts reclassified from accumulated other comprehensive income:
Actuarial costs (reclassified to salaries, wages and benefits)		2,594			(23	)		—			2,571
Income Tax (Expense) or Benefit		(610	)		6			—			(604	)
Other comprehensive income (loss), net of tax		1,984			(17	)		—			1,967
Balance as of March 31, 2024	$	(55,947	)	$	485		$	—		$	(55,462	)

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NOTE L—STOCK-BASED COMPENSATION

The Company's Board of Directors has granted stock-based incentive awards to certain employees and directors pursuant to a long-term incentive plan which was approved by the Company's stockholders in May 2005 and in May 2015. Employees have been awarded non-vested restricted stock, non-vested stock units with performance conditions, and non-vested stock units with market conditions. The restrictions on the non-vested restricted stock awards lapse at the end of a specified service period, which is typically three years from the grant date. The non-vested stock units will be converted into a number of ATSG common shares depending on the satisfaction of the performance conditions or market conditions at the end of a specified service period, which is typically three years from the grant date. The performance condition awards will be converted into a number of ATSG common shares based on the Company's average return on invested capital during the service period. Similarly, the market condition awards will be converted into a number of common shares depending on the appreciation of ATSG common shares compared to the Nasdaq Transportation Index. Directors have been granted time-based awards that vest after a period of twelve months. Under each of the stock-based incentive awards, the restrictions may lapse sooner than the stated settlement period upon (1) the participant's death or disability, (2) an employee participant's qualification for retirement or (3) a change in control, in the case of an employee participant under the 2015 long-term incentive plan, or a business combination, in the case of a director participant under the 2005 or 2015 long-term incentive plan. The Company expects to settle all of the stock unit awards by issuing new ATSG common shares. The table below summarizes award activity for the three months ended March 31, 2024 and 2023:

	*March 31, 2024*					*March 31, 2023*
				*Weighted*					*Weighted*
				*average*					*average*
	*Number of*			*grant-date*		*Number of*			*grant-date*
	*Awards*			*fair value*		*Awards*			*fair value*
Outstanding at beginning of period		1,066,784		$	20.19		929,205		$	21.83
Granted		926,984			12.37		—			—
Converted		(71,359	)		25.71		(186,828	)		20.87
Expired		—			—		—			—
Forfeited		(9,600	)		26.90		(600	)		36.93
Outstanding at end of period		1,912,809		$	16.16		741,777		$	22.04
Vested		496,838		$	10.80		298,928		$	8.02

The average grant-date fair value of each performance condition award, non-vested restricted stock award and time-based award granted by the Company in 2024 was $12.19, the fair value of the Company’s stock on the date of grant. The average grant-date fair value of each market condition award granted in 2024 was $12.95. The market condition awards granted in 2024 were valued using a Monte Carlo simulation technique based on daily stock prices over three years and using the following variables:

	*2024*
Risk-free interest rate	4.4	%
Volatility	43.0	%

For the three months ended March 31, 2024 and 2023, the Company recorded expense of $2.6 million and $1.4 million respectively, for stock-based incentive awards. At March 31, 2024, there was $18.7 million of unrecognized expense related to the stock-based incentive awards that is expected to be recognized over a weighted-average period of 1.8 years. As of March 31, 2024, none of the awards were convertible, 496,838 units of the directors' time-based awards had vested and none of the outstanding shares of the restricted stock had vested. These awards could result in the issuance of a maximum number of 2,449,584 additional outstanding shares of ATSG's common stock depending on service, performance and market results through December 31, 2026.

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NOTE M—COMMON STOCK AND EARNINGS PER SHARE

Earnings per Share

The calculation of basic and diluted earnings per common share is as follows (in thousands, except per share amounts):

	*Three Months Ended*
	*March 31,*
	*2024*		*2023*
Numerator:
Earnings from continuing operations - basic	$	8,619	$	20,141
Gain from stock warrants revaluation, net of tax	$	—	$	(108	)
Convertible debt interest charge, net of tax	$	159	$	776
Earnings from continuing operations - diluted	$	8,778	$	20,809

Denominator:
Weighted-average shares outstanding for basic earnings per share		64,973		71,802
Common equivalent shares:
Effect of stock-based compensation awards and warrants		562		3,144
Effect of convertible debt		1,700		8,111
Weighted-average shares outstanding assuming dilution		67,235		83,057
Basic earnings per share from continuing operations	$	0.13	$	0.28
Diluted earnings per share from continuing operations	$	0.13	$	0.25

Basic weighted average shares outstanding for purposes of basic earnings per share are less than the shares outstanding due to 700,271 shares and 226,149 shares of restricted stock for 2024 and 2023, respectively, which are accounted for as part of diluted weighted average shares outstanding in diluted earnings per share.

The determination of diluted earnings per share requires the exclusion of the fair value re-measurement of the stock warrants recorded as a liability (see Note C), if such warrants have an anti-dilutive effect on earnings per share. The dilutive effect of the weighted-average diluted shares outstanding is calculated using the treasury method for periods in which equivalent shares have a dilutive effect on earnings per share. Under this method, the number of diluted shares is determined by dividing the assumed proceeds of the warrants recorded as a liability by the average stock price during the period and comparing that amount with the number of corresponding warrants outstanding.

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NOTE N—SEGMENT AND REVENUE INFORMATION

The Company operates in two reportable segments. The CAM segment consists of the Company's aircraft and engine leasing operations. The ACMI Services segment consists of the Company's airline operations, including CMI agreements as well as ACMI, charter service and passenger service agreements that the Company has with its customers. The Company's aircraft maintenance services, aircraft modification services, ground services and other support services, are not large enough to constitute reportable segments and are combined in All other. Intersegment revenues are valued at arms-length market rates.

The Company's segment information from continuing operations is presented below (in thousands):

	*Three Months Ended*
	*March 31,*
	*2024*			*2023*
Total revenues:
CAM	$	105,549		$	112,044
ACMI Services		323,824			334,127
All other		109,040			110,588
Eliminate inter-segment revenues		(52,896	)		(55,664	)
Total	$	485,517		$	501,095
Customer revenues:
CAM	$	79,591		$	83,158
ACMI Services		323,711			334,113
All other		82,215			83,824
Total	$	485,517		$	501,095

The Company's external customer revenues from other activities for the three month period ended March 31, 2024, and 2023 are presented below (in thousands):

	*Three Months Ended*
	*March 31,*
	*2024*		*2023*
Aircraft maintenance, modifications and part sales	$	40,348	$	42,073
Ground services		23,221		23,665
Other, including aviation fuel sales		18,646		18,086
Total customer revenues	$	82,215	$	83,824

During the three month period ended March 31, 2024, the Company recognized $3.9 million, respectively, of non-lease revenue that was reported as deferred revenue at the beginning of the applicable period, compared to $6.5 million for the comparable period in 2023. Current deferred revenue of $9.1 million and $4.5 million as of March 31, 2024 and December 31, 2023, respectively, for contracts with customers is derived from other activities as described above. Revenue related to deferred revenue will be recognized based on percentage of completion. Customers are required to pay deposits and may be required to make milestone payments for these services resulting in deferred revenue. Long-term contract assets were $8.2 million as of March 31, 2024 compared to $8.7 million as of December 31, 2023. Cash will be collected over the term of the multi-year agreement based on number cycles per period while revenue is recognized as parts are provided for engine maintenance services. This may result in a contract asset or liability based on the timing of engine maintenance services.

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CAM's leases do not contain residual guarantees. Approximately 16% of CAM's leases to external customers contain purchase options at projected market values. As of March 31, 2024, minimum future payments from external customers for leased aircraft and equipment were scheduled to be $217.4 million for the remainder of 2024, and $267.0 million, $235.1 million, $206.8 million and $171.9 million, respectively, for each of the next four years ending December 31, 2028 and $254.3 million thereafter. CAM's external customer revenues for non-lease activities were $4.8 million and $6.7 million for the three month period ended March 31, 2024 and 2023, respectively, for engine services and the sale of spare engine parts.

The Company's other segment information from continuing operations is presented below (in thousands):

	*Three Months Ended*
	*March 31,*
	*2024*			*2023*
Depreciation and amortization expense:
CAM	$	65,373		$	60,397
ACMI Services		24,249			23,621
All other		758			710
Total	$	90,380		$	84,728
Interest expense
CAM		15,280			10,022
ACMI Services		5,493			4,958
Segment earnings (loss):
CAM	$	13,409		$	34,200
ACMI Services		(3,485	)		(2,411	)
All other		2,307			654
Net unallocated interest expense		(976	)		(510	)
Net gain (loss) on financial instruments		2,355			(1,740	)
Other non-service components of retiree benefit costs, net		(1,085	)		(3,218	)
Loss from non-consolidated affiliate		(79	)		(406	)
Pre-tax earnings from continuing operations	$	12,446		$	26,569

The amortization of customer incentives included in revenue for CAM was $3.1 for the three month period ended March 31, 2024 compared to $5.0 million for the corresponding period in 2023. The amortization of customer incentives included in revenue for ACMI Services was $0.8 million for the three month period ended March 31, 2024 compared to $0.8 million in the corresponding period of 2023.

The Company's assets are presented below by segment (in thousands). Cash and cash equivalents are reflected in Assets - All other.

	*March 31,*		*December 31,*
	*2024*		*2023*
Assets:
CAM	$	2,929,853	$	2,885,508
ACMI Services		829,133		828,703
All other		132,751		167,879
Total	$	3,891,737	$	3,882,090

During the three months ended March 31, 2024, the Company had capital expenditures for property and equipment of $20.7 million and $82.1 million for the ACMI Services and CAM, respectively.

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ITEM 2. MANAGEMENT'S DISCUSSION AND ANALYSIS OF FINANCIAL CONDITION AND RESULTS OF OPERATIONS.

The following Management’s Discussion and Analysis of Financial Condition and Results of Operations ("MD&A") has been prepared with reference to the historical financial condition and results of operations of ATSG and its subsidiaries. The MD&A describes the principal factors affecting our results of operations, financial condition, cash flow, liquidity and capital resources. The MD&A should be read in conjunction with the accompanying unaudited condensed consolidated financial statements and related notes prepared in accordance with accounting principles generally accepted in the United States of America (GAAP) contained in this Form 10-Q and the audited consolidated financial statements and related notes prepared in accordance with GAAP contained in our 2023 Form 10-K.

OVERVIEW

We provide aircraft leasing and air cargo transportation and related services. To support the needs of our leasing customers in the aviation and logistics industries at large, we offer a range of complementary services to delivery companies, freight forwarders, e-commerce operators, airlines and government customers. Our principal subsidiaries include our aircraft leasing company (CAM) and three independently certificated airlines (ABX, ATI and OAI).

We primarily operate through two reportable segments, CAM and ACMI Services:

CAM offers aircraft leasing and related services to external customers and also leases aircraft internally to our airlines. CAM acquires passenger aircraft and manages the modification of the aircraft into freighters. The follow-on aircraft leases normally cover a term of five to ten years. CAM currently leases Boeing 767, 757 and 777 aircraft, Airbus A321 aircraft and aircraft engines, and is in the process of adding Airbus A330 freighter aircraft to its fleet.

ACMI Services consists of the cargo and passenger transportation operations of our three airline subsidiaries. Our airlines operate under contracts to provide a combination of aircraft, flight crews, aircraft maintenance, aircraft hull and liability insurance and aviation fuel. Our customers are typically responsible for supplying the necessary aviation fuel and cargo handling services and reimbursing our airline for other operating expenses such as landing fees, ramp expenses, certain aircraft maintenance expenses and fuel procured directly by the airline. Aircraft charter agreements, including those for the DoD, usually require the airline to provide full service, including fuel and other operating expenses for a fixed, all-inclusive price.

Our other business operations, which primarily provide support services to the transportation industry, include providing aircraft maintenance and modification services to customers, cargo load transfer and sorting services as well as related equipment maintenance services. These operations do not constitute reportable segments and are reported in "All other."

At March 31, 2024, we owned 109 Boeing aircraft and three Airbus aircraft that were in revenue service. We owned three Boeing 767-300 freighter aircraft and one Boeing 767-200 freighter aircraft not in revenue service having been returned from lease and that are expected to be re-leased in 2024 or 2025. We also owned thirteen Boeing 767-300 aircraft, six Airbus 321-200 aircraft and five Airbus A330 aircraft, either undergoing or awaiting induction into the freighter conversion process at March 31, 2024. In addition to these aircraft, we leased five passenger aircraft from third parties and operated 16 freighter aircraft provided by customers for whom we provide services under CMI agreements.

Customers

Our largest customers are ASI, which is a subsidiary of Amazon, the DoD and DHL. Revenues from our commercial arrangements with ASI comprised approximately 34% and 35% of our consolidated revenues during the three month periods ended March 31, 2024 and 2023, respectively. As of March 31, 2024, we leased 34 Boeing 767 freighter aircraft to ASI with lease expirations between 2024 and 2031. The aircraft lease terms typically range from 5 to 10 years. Under a separate air transportation services agreement, we operate those aircraft for ASI and we operate ten other Boeing 767 aircraft provided by ASI. We also provide ground services and aircraft maintenance services to ASI.

On May 6, 2024, we entered an agreement with ASI to operate ten additional Boeing 767-300 freighter aircraft to be provided by ASI, with the potential to add up to ten additional Boeing 767-300 freighter aircraft. The agreement extends the expiration date of the air transportation services agreement from March 2026 to May 2029 with renewal options. Also on May 6, 2024, in conjunction with the agreement, we agreed to issue additional warrants to Amazon and modify provisions of certain existing warrants. See Note C of the accompanying consolidated financial statements for additional information regarding the agreements with ASI.

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DHL comprised 13% and 14% of our consolidated revenues during the three month periods ended March 31, 2024 and 2023, respectively. As of March 31, 2024, we leased 14 Boeing 767 freighter aircraft to DHL comprising one Boeing 767-200 aircraft and 13 Boeing 767-300 aircraft, with expirations between 2025 and 2031. Ten of the 14 Boeing 767 aircraft were being operated by our airlines for DHL. Additionally, we operated six Boeing 767 aircraft that were provided by DHL.

The DoD comprised 28% and 29% of our consolidated revenues during the three month periods ended March 31, 2024 and 2023 respectively, derived primarily from operating passenger and combi charter flights. We utilize our fleet of 15 passenger aircraft to operate troop movement flights for the DoD. We also operate our four combi aircraft for the DoD, which are capable of simultaneously carrying cargo and passengers on the main deck. We have been providing services to the DoD since the 1990’s, typically under one-year agreements.

RESULTS OF OPERATIONS

Revenue and Earnings Summary

External customer revenues from continuing operations decreased by $15.6 million, or 3%, to $485.5 million during the three month period ended March 31, 2024 compared to the same period in 2023. Customer revenues decreased from Boeing 767-200 aircraft leases, engine power revenues and flying for customers' delivery networks during the first three months of 2024

The consolidated earnings from continuing operations were $8.6 million for the three month period ended March 31, 2024 compared to $20.1 million for the corresponding period in the prior year. The pre-tax earnings from continuing operations were $12.4 million for the three month period ended March 31, 2024 compared to $26.6 million for the corresponding period in the prior year. Earnings was affected by the following events and items that do not directly reflect our underlying operations among the periods presented. Pre-tax earnings from continuing operations:

•

included gains of $2.4 million for the three month period ended March 31, 2024 for financial instrument valuations, including interest rate swaps and instruments granted to Amazon compared to losses of $1.7 million for the same period in the prior year.

•

were also reduced to $3.9 million for the three month period ended March 31, 2024 for the amortization of customer lease incentives given to Amazon in the form of warrants compared to $5.8 million for the same period in the prior year.

•

included losses of $1.1 million for the three month period ended March 31, 2024 for non-service components of retiree benefit plans compared to $3.2 million for the same period in the prior year.

•

included losses of $0.1 million for the three month period ended March 31, 2024 for our share of joint venture results, including engineering costs for the development of an aircraft modification for the Airbus A321 aircraft type compared to losses of $0.4 million for the same period in the prior year.

•

included losses of less than $0.1 million for the three month period ended March 31, 2023, net related insurance recoveries for the costs which occurred as a direct result of a foam release after a hangar's fire suppression system malfunctioned during 2022.

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After removing the effects of these events and items, adjusted pre-tax earnings from continuing operations, a non-GAAP financial measure (see the reconciliation of adjusted pre-tax earnings from continuing operations to pre-tax earnings from continuing operations in the following table), were $15.2 million for three month period ended March 31, 2024 compared to $37.8 million for the corresponding period in 2023. Adjusted pre-tax earnings from continuing operations for the three month period ended March 31, 2024 decreased $22.6 million primarily due to lower earnings from Boeing 767-200 aircraft leases and related engine power programs, as well as higher interest expense and depreciation expense, most of which are reflected in our CAM segment. Additionally, lower revenues and block hours flown for customers' delivery networks resulted in lower earnings for ACMI Services compared to the same period of the previous year.

A summary of our revenues from continuing operations, pre-tax earnings from continuing operations and adjusted pre-tax earnings from continuing operations, as well as a reconciliation of adjusted pre-tax earnings from continuing operations to pre-tax earnings from continuing operations, is shown below:

	Three Months Ended
	March 31,
	2024			2023
Revenues from Continuing Operations:
CAM
Aircraft leasing and related services	$	108,645		$	117,074
Lease incentive amortization		(3,096	)		(5,030	)
Total CAM		105,549			112,044
ACMI Services		323,824			334,127
Other Activities		109,040			110,588
Total Revenues		538,413			556,759
Eliminate internal revenues		(52,896	)		(55,664	)
Customer Revenues	$	485,517		$	501,095

Pre-Tax Earnings from Continuing Operations:
CAM, inclusive of interest expense	$	13,409		$	34,200
ACMI Services, interest expense		(3,485	)		(2,411	)
Other Activities		2,307			654
Net unallocated interest expense		(976	)		(510	)
Net financial instrument re-measurement (loss) gain		2,355			(1,740	)
Other non-service components of retiree benefits costs, net		(1,085	)		(3,218	)
Loss from non-consolidated affiliate		(79	)		(406	)
Pre-Tax Earnings from Continuing Operations		12,446			26,569
Add other non-service components of retiree benefit costs, net		1,085			3,218
Add charges for non-consolidated affiliates		79			406
Add lease incentive amortization		3,912			5,822
Add net loss (gain) on financial instruments		(2,355	)		1,740
Add net charges for hangar foam incident		—			41
Adjusted Pre-Tax Earnings from Continuing Operations (non-GAAP)	$	15,167		$	37,796

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We define adjusted pre-tax earnings from continuing operations, a non-GAAP financial measure, as pre-tax earnings from continuing operations excluding the following: (i) non-service components of retiree benefit costs; (ii) gains and losses for the fair value re-measurement of financial instruments including warrants issued to Amazon; (iii) customer lease incentive amortization; (iv) gains and losses from non-consolidated joint ventures; and (v) charges related to the discharge of a fire suppression system in the Company's aircraft hangar, net of related insurance recoveries. We exclude these items from pre-tax earnings from continuing operations because they are distinctly different in their predictability or not closely related to our ongoing operating activities. Management uses adjusted pre-tax earnings from continuing operations to compare the performance of core operating results between periods. Presenting this non-GAAP financial measure provides management and investors with a comparative metric of fundamental operations while highlighting changes to certain items among periods. Adjusted results should not be considered in isolation or as a substitute for analysis of the Company's results as calculated and reported under GAAP.

Aircraft Fleet Summary

Our fleet of cargo and passenger aircraft is summarized in the following table as of March 31, 2024, and December 31, 2023. Our freighters, converted from passenger aircraft, utilize standard shipping containers and can be deployed into regional cargo markets more economically than larger capacity aircraft, newly built freighters or other competing alternatives. At March 31, 2024, we owned 13 Boeing 767-300 aircraft, six Airbus A321-200 aircraft and five Airbus A330 aircraft that were either already undergoing or awaiting induction into the freighter conversion process. As of March 31, 2024, we also owned three Boeing 767-300 freighter aircraft and one Boeing 767-200 freighter aircraft staging for future lease.

Aircraft fleet activity during the first three months of 2024 is listed below:

•

CAM completed the modification of four Boeing 767-300 freighter aircraft purchased in the previous year. The aircraft are leased to external customers under multi-year leases.

•

External customers returned three Boeing 767-200 freighter aircraft to CAM. One of these aircraft was leased to ABX. The remaining aircraft have currently been removed from service and their parts and engines will be used to support the fleet, re-leased to customers or possibly sold.

•

An external customer returned one Boeing 767-300 freighter aircraft to CAM. This aircraft has been leased to ABX.

•

OAI began a short term lease of one Boeing 767-300 passenger aircraft from an external lessor.

•

CAM purchased three Boeing 767-300 passenger aircraft. These aircraft are expected to be converted into standard freighter configuration and leased to external customers during 2025 or 2026.

•

CAM purchased two Airbus A330 passenger aircraft for the purpose of converting them into a standard freighter configuration. These aircraft are expected to be leased to an external customer during 2025.

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	March 31, 2024						December 31, 2023
	ACMI						ACMI
	Services		CAM		Total		Services		CAM		Total
In-service aircraft
Aircraft owned
Boeing 767-200 Freighter		5		13		18		4		16		20
Boeing 767-200 Passenger		2		—		2		2		—		2
Boeing 767-300 Freighter		3		74		77		2		71		73
Boeing 767-300 Passenger		5		—		5		5		—		5
Boeing 777-200 Passenger		3		—		3		3		—		3
Boeing 757-200 Combi		4		—		4		4		—		4
Airbus A321-200 Freighter		—		3		3		—		3		3
		22		90		112		20		90		110
Operating lease
Boeing 767-200 Passenger		1		—		1		1		—		1
Boeing 767-300 Passenger		4		—		4		3		—		3
Boeing 767-200 Freighter		2		—		2		2		—		2
Boeing 767-300 Freighter		14		—		14		14		—		14
Total		21		—		21		20		—		20
Other aircraft
Owned Boeing 767-300 under or awaiting modification		—		13		13		—		14		14
Owned Airbus A321-200 under or awaiting modification		—		6		6		—		6		6
Owned Airbus A330 under or awaiting modification		—		5		5		—		3		3
Boeing 767 available for lease		—		4		4		—		4		4

As of March 31, 2024, ABX, ATI and OAI were leasing 22 in-service aircraft internally from CAM for use in ACMI Services. Of CAM's 13 externally leased Boeing 767-200 freighter aircraft, four were leased to ASI and operated by ABX or ATI, one was leased to DHL and operated by ABX and eight were leased to other external customers. Of the 74 externally leased Boeing 767-300 freighter aircraft, 30 were leased to ASI and operated by ABX or ATI, nine were leased to DHL and operated by ABX, four were leased to DHL and were being operated by a DHL-affiliated airline and 31 were leased to other external customers. The carrying values of the total in-service fleet as of March 31, 2024 and December 31, 2023 were $1,994.1 million and $1,898.7 million, respectively. Additionally, we own several Boeing 767 airframes that are not in service condition. These aircraft are being used to support our in-service Boeing fleet with engines and aircraft parts or are being marketed.

CAM

CAM's revenues from external customers totaled $79.6 million for the three month period ended March 31, 2024 compared to $83.2 million for the same period in the prior year. CAM's revenues from our airlines totaled $26.0 million during the three month period ended March 31, 2024 compared to $28.9 million for the same period in the prior year. CAM's aircraft leasing and related services revenues, which exclude customer lease incentive amortization, decreased $8.4 for the three month period ended March 31, 2024, compared to the corresponding period in 2023. Revenues during 2024 were reduced by the scheduled returns of Boeing 767-200 freighter aircraft from lease and lower hours flown by engines in our Boeing 767-200 engine power program. Since April 1, 2023, CAM added 12 Boeing 767-300 freighter aircraft and three Airbus A321-200 freighters to its portfolio and placed all 15 of these aircraft with external customers under long-term leases. During that same time period, 12 767-200 freighters and four 767-300 freighters were returned from leases from external customers. CAM's revenues from its 767-200 engine power program have decreased $7.3 million for the three month period ended March 31, 2024 compared to the corresponding period of 2023, due primarily to the reduction in leased 767-200 aircraft.

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CAM's pre-tax earnings, inclusive of internally allocated interest expense, was $13.4 million for the three months ended March 31, 2024 compared to $34.2 million for the same period in the prior year. CAM's earnings was negatively impacted by the reduction in 767-200 freighter lease and engine power program revenues. Additionally, reduced earnings compared to the prior year period included $5.3 million more internally allocated interest expense due to higher company-wide interest expense and $5.0 million more depreciation expense primarily due to the new aircraft placed into service. Pre-tax earnings reflects the same amount of aircraft, netting additional 767-300 leases with 767-200 freighter returns since April 1, 2023. Additionally, depreciation expense increased $5.0 million for the three month period ended March 31, 2024

CAM's future operating results will depend on a number of factors including the continued demand from lessees for mid-sized widebody freighters, our ability to convert passenger aircraft into freighters within planned costs and within the time frames required by customers and the lease rates under which aircraft are redeployed or renewed. Our CAM fleet projections for 2024 are described below by aircraft type:

●

CAM plans to remove five more Boeing 767-200's from service during the remainder of 2024 and retire most of these aircraft for a combination of parts to support our fleet and part sales to third parties.

●

In addition to three Boeing 767-300 freighter aircraft available for lease and 13 Boeing 767-300 aircraft subject to freighter modification as of March 31, 2024, CAM has commitments to purchase one more Boeing 767-300 passenger aircraft during 2024 for freighter modification. CAM plans to complete the modification of five more Boeing 767-300 aircraft during 2024. CAM has leased four aircraft through March 31, 2024 and currently has inter-ATSG assignments for one more aircraft lease during the remainder of 2024. The other seven aircraft are being marketed for lease during 2024. During the remainder of 2024, CAM has three Boeing 767-300 aircraft leases scheduled to expire.

●

CAM expects to complete the freighter modification of the six Airbus A321 aircraft that were subject to freighter modification as of March 31, 2024. CAM is currently marketing these six for lease to external customers for leases to begin in 2024. CAM does not have commitments to acquire more Airbus A321 aircraft at this time. The U.S. FAA, the Civil Aviation Administration of China and aviation regulators in Europe have certified the design of the modified Airbus A321 that CAM utilizes to convert the passenger aircraft to a freighter via its joint venture.

●

In addition to the five Airbus A330 aircraft that CAM owned at March 31, 2024, CAM is scheduled to purchase three more Airbus A330 passenger aircraft during 2024. CAM expects to complete the freighter modification for two of these Airbus A330 aircraft during 2024 and they are being marketed for lease.

CAM's future operating results will also depend on depreciation expense for newly modified aircraft as an aircraft reaches service condition, the sale price of aircraft which could be sold, interest expense, revenues from the utilization of the engines that power our Boeing 767-200 aircraft and other factors. Further, certain airline customers serving international routes have in recent times experienced and could further experience a weakness in demand from the large integrators and markets they serve. This could lead to a disruption in our expected revenues and cash remittances from one or more customers. CAM's pre-tax earnings are subject to changes from market interest rates and our level of debt. Changes to market conditions could affect the demand for modified aircraft or the projected returns on our fleet expansion from the outcomes currently expected, and further, management may take additional actions such as the further deferral or cancellation of planned growth investments or the divestiture of certain aircraft.

ACMI Services

Total revenues from ACMI Services decreased $10.3 million compared to 2023 for the three month period ended March 31, 2024 to $323.8 million. During the three month period ended March 31, 2024, block hours flown for our customers' delivery networks decreased 3% compared to the corresponding period in 2023 reflecting to the removal of certain Boeing 767-200 aircraft and fewer international flights. Block hours for passenger services during the three month period ended March 31, 2024, including operation of Boeing 757 combi aircraft, were flat compared to the corresponding period of 2023.

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ACMI Services had pre-tax losses of $3.5 million during the three month period ended March 31, 2024 compared to pre-tax losses of $2.4 million for the corresponding period of 2023 inclusive of internally allocated interest expense. ACMI Services was impacted by additional internally allocated interest expense of $0.5 million for the three month period ended March 31, 2024, compared to the corresponding period in 2023 due to higher interest rates and debt balances in 2024. The decline in earnings during 2024 reflects the reduced operations for our customers delivery networks' during 2024 compared to the first three months of 2023. We operated three fewer freighter aircraft in ACMI Services since April 1, 2023.

Maintaining profitability in ACMI Services will depend on a number of factors, including the impact of inflation on operating expenses, customer billing rates, customer flight schedules, crewmember productivity and pay, employee attrition, employee benefits, aircraft maintenance schedules and the number of aircraft we operate. Our airlines are planning to add eleven customer provided aircraft into operations during the remainder of 2024. These additions will require start-up expenses and may impact our operational performance in the near term. The war in Israel and conflicts in other parts of the world may also impact our operations, reducing the number of flights that we operate for the DoD and other customers.

Other Activities

External customer revenues from all other activities decreased $1.6 million for the three month period ended March 31, 2024 compared to the corresponding period of 2023. External aircraft maintenance revenues declined during the first quarter of 2024 compared to 2023 while aircraft maintenance resources were applied to more internally billed projects. Pre-tax earnings from other activities were $2.3 million for the three month period ended March 31, 2024 compared to pre-tax earnings of $0.7 million for the same period in the prior year. The increase in earnings during 2024 reflects a revenue mix of higher margin airframe maintenance contracts instead of lower margin line maintenance revenues. Additionally, lower overhead expense during 2024 contributed to improved earnings compared to the previous year.

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Expenses from Continuing Operations

Salaries, wages and benefits expense decreased $5.2 million or 3% during the first quarter of 2024 compared to the first quarter of 2023. The decline in expense is due primarily to the decrease in total employees in the first quarter of 2024 compare to 2023. Inflationary pressures and employee attrition may continue to impact wages in the future.

Depreciation and amortization expense increased $5.7 million during the first quarter of 2024 compared to the first quarter of 2023. The increase reflects incremental depreciation for 15 newly converted aircraft added to its operating fleet since April 1, 2023. Increased depreciation from newly converted aircraft was partially offset by lower depreciation for our fleet of Boeing 767-200 aircraft. We expect depreciation expense to continue to increase during future periods in conjunction with our fleet expansion, engine programs and capital spending plans.

Maintenance, materials and repairs expense increased by $6.1 million or 14% during the first quarter of 2024 compared to the first quarter of 2023. This expense line includes the cost of materials and repairs to maintain aircraft and engines, as well as similar costs for providing maintenance services to customers. The increase reflects an increase in scheduled airframe maintenance, part repairs and engine repairs. The aircraft maintenance and material expenses can vary among periods due to the number of maintenance events and the scope of airframe checks that are performed.

Contracted ground and aviation services expense includes navigational services, aircraft and cargo handling services, baggage handling services and other airport services. Contracted ground and aviation services decreased $2.1 million during the first quarter of 2024 compared to the first quarter of 2023. Contracted ground and aviation services vary with the level of passenger airline operations. The decrease corresponded to decreased flying volumes.

Fuel expense decreased by $3.2 million during the first quarter of 2024 compared to the first quarter of 2023. Fuel expense includes the cost of fuel to operate DoD flights, fuel used to position aircraft for service and for maintenance purposes, as well as the cost of fuel we resell to customers at the airport in Wilmington, Ohio. For the three month period ended March 31, 2024, the decrease in fuel expense reflects a decrease in block hours flown and a decrease in the price of fuel.

Other operating expenses decreased by $2.7 million during the first quarter of 2024 compared to the first quarter of 2023. Other operating expenses for 2024 include decreases for professional fees and precautionary expense related to COVID prevention.

Non-Operating Income, Adjustments and Expenses

Interest expense increased by $6.3 million during the first quarter of 2024 compared to the first quarter of 2023. Interest rates under our Senior Credit Agreement increased year over year. Additionally, during August 2023 we issued $400.0 million of unsecured convertible notes bearing interest at 3.875%, proceeds from which were used in part to replace $204.5 million of convertible notes bearing 1.125% which were set to mature in 2024.

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We recorded unrealized pre-tax gains on financial instrument re-measurements of $2.4 million during the first quarter of 2024 compared to pre-tax losses of $1.7 million for the first quarter in 2023. The gains and losses include the re-valuing, as of March 31, 2024 and 2023, the stock warrants and ATSG stock sale option granted to Amazon and interest rate swaps that we hold. Generally, the warrant values increase or decrease with corresponding decreases or increases in the ATSG common stock price during the measurement period. Additionally, the value of warrants depends partially on the probability that warrants will vest upon the execution of aircraft leases. Increases in the probability of a warrants vesting and the sales option exercise price being above the traded ATSG price results in higher liabilities and losses.

Non-service components of retiree benefits resulted in net losses of $1.1 million during the first quarter of 2024 compared to losses of $3.2 million for the corresponding period in 2023. The non-service component gain and losses of retiree benefits are determined by actuaries and include the amortization of unrecognized gain and loss stemming from changes in assumptions regarding discount rates, expected investment returns and other retirement plan assumptions. Non-service components of retiree benefits can vary significantly from one year to the next based on investment results and changes in discount rates used to account for defined benefit retirement plans.

The provision for income taxes for interim periods is based on management's best estimates of the effective income tax rates expected to be applicable for the current year, plus any adjustments arising from changes in the estimated amount of taxable income related to prior periods. Income taxes recorded through March 31, 2024 have been estimated based on year-to-date income and projected results for the full year.

The effective rate from continuing operations for the three month period ended March 31, 2024 was 31%. The effective tax rate is affected by the discrete tax items in which expense and benefits for tax purposes are different than required by generally accepted accounting principles. The effective rate can be impacted by a number of factors, including the apportionment of income among taxing jurisdictions, deductibility limitations on employee compensation, deductibility limitations on meals and per diems and the results of our Ireland-based subsidiary. The Company's effective tax rate before including the effects of the re-measurement of financial instruments, incentive amortizations and other adjustments for adjusted pre-tax earnings from continuing operations (see items in the table above) was 29% for the three month period ended March 31, 2024 compared to 24% for 2023. The increase in the effective tax rate for 2024 is due to an increase in non-deductible items on lower pre-tax earnings and an increase in the portion of pre-tax earnings occurring in tax jurisdictions with higher rates.

LIQUIDITY AND CAPITAL RESOURCES

Cash Flows

Net cash generated from operating activities totaled $126.4 million and $216.4 million for the three month periods ended March 31, 2024 and 2023, respectively. Operating cash flows during the first three months of 2023 were higher due to the collection of large amounts of customer receivables from previous periods. Cash payments for interest expense increased $19.7 million to $32.9 million for the first three months of 2024 compared to the same period of 2023 due to increased interest rates. Cash outlays for pension contributions were $0.9 million and $0.8 million for the three month periods ended March 31, 2024 and 2023, respectively.

Capital spending levels were primarily the result of aircraft modification costs and the acquisition of aircraft for freighter modification. Cash payments for capital expenditures were $102.3 million and $218.8 million for the three month periods ended March 31, 2024 and 2023, respectively. Capital expenditures for the first three months of 2024 included $71.9 million for the acquisition of three Boeing 767-300 aircraft, two Airbus A330 aircraft and freighter modification costs; $28.1 million for required heavy maintenance; and $2.3 million for other equipment. Capital expenditures in the first three months of 2023 included $164.6 million for the acquisition of five Boeing 767-300 aircraft, two Airbus A321-200 aircraft and freighter modification costs; $51.8 million for required heavy maintenance; and $2.4 million for other equipment.

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Cash proceeds of $0.9 million and $9.9 million were received during the three month periods ended March 31, 2024 and 2023, respectively, primarily for the sale of aircraft engines.

During the three month period ended March 31, 2024 we spent $9.8 million to invest in joint ventures compared to $0.8 million during the corresponding period in 2023. Our joint venture with Precision Aircraft Solutions, LLC, developed a passenger-to-freighter conversion program for Airbus A321-200 aircraft and our joint venture with GA Telesis Engine Services, LLC provides engine tear-down services to harvest and sell engine parts.

Net cash used in financing activities was $45.6 million during the three month period ended March 31, 2024 compared to $55.8 million net cash provided by financing activities during the corresponding period in 2023.

During the first three months of 2024, we drew $95.0 million from the revolving credit facility under the Senior Credit Agreement and repaid $140.1 million on the revolving credit and other financing arrangements. During the corresponding period in the prior year, we made debt principal payments of $25.2 million and we drew $105.0 million from the revolving credit facility.

Commitments

As of March 31, 2024, we had 24 aircraft that were in or awaiting modification to a freighter configuration. Additionally, we placed non-refundable deposits and have agreements to purchase three more Boeing 767-300 aircraft and five Airbus A330 passenger aircraft through 2025. We outsource a significant portion of the aircraft freighter modification process to non-affiliated third parties. The modification process primarily consists of the installation of a standard cargo door and loading system. We estimate that total capital expenditures for 2024 will be approximately $410 million, of which the majority will be related to aircraft purchases and freighter modifications. Actual capital spending for any future period will be impacted by whether customer demand supports our return requirements as well as aircraft acquisitions, maintenance and modification processes.

Liquidity and Capital Resources

At March 31, 2024, we had $23.2 million of cash balances and $403.7 million available from the unused portion of the revolving credit facility under the Senior Credit Agreement as described in Note F of the accompanying consolidated financial statements. We expect our operations to continue to generate significant net cash in-flows after deducting required spending of approximately $165 million for heavy maintenance and other sustaining capital expenditures. To expand our fleet, we estimate that capital expenditures for aircraft purchases and freighter modifications will total $245 million for 2024. We believe that our current cash balance, forecasted cash flows provided from customer leases and operating agreements, combined with the Senior Credit Agreement, will be sufficient to fund the expansion and maintenance of our fleet while meeting our contractual obligations, other commitments and working capital requirements for at least the next twelve months. See Note F of the accompanying consolidated financial statements for additional information regarding our credit facilities and outstanding debt obligations.

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CRITICAL ACCOUNTING ESTIMATES

The MD&A and certain other disclosures included elsewhere in this Form 10-Q are based upon our consolidated financial statements, which have been prepared in accordance with GAAP. The preparation of the financial statements requires us to select appropriate accounting policies and make estimates and judgments that affect the reported amounts of assets, liabilities, revenues and expenses, and related disclosures of contingencies. In certain cases, there are alternative policies or estimation techniques which could be applied. On an ongoing basis, we evaluate our selection of policies and the estimation techniques we use, including those related to revenue recognition, post-retirement liabilities, bad debts, self-insurance reserves, valuation of spare parts inventory, useful lives, salvage values and impairment of property and equipment, income taxes, contingencies and litigation. We base our estimates on historical experience, current conditions and on various other assumptions that are believed by management to be reasonable under the circumstances. Those factors form the basis for making judgments about the carrying values of assets and liabilities that are not readily apparent from other sources, as well as for identifying and assessing our accounting treatment with respect to commitments and contingencies. By their nature, these judgments are subject to uncertainty. Actual results may differ from these estimates under different assumptions or conditions.

For information regarding recently issued accounting pronouncements and the expected impact on our annual statements, see Note A in the accompanying notes to the Condensed Consolidated Financial Statements included in Part I, Item 1 of this Form 10-Q. Except as provided in Note A, our critical accounting policies and estimates have not changed materially from those disclosed in our 2023 Form 10-K.

ITEM 3. QUANTITATIVE AND QUALITATIVE DISCLOSURES ABOUT MARKET RISK.

The Company is exposed to market risk for increasing interest rates and changes in the price of jet fuel. The risk associated with jet fuel, however, is largely mitigated by reimbursement through the agreements with its customers.

Market risks have not materially changed from those disclosed in Item 7A of the Company's 2023 Form 10-K.

ITEM 4. CONTROLS AND PROCEDURES.

Evaluation of Disclosure Controls and Procedures

As of March 31, 2024, the Company carried out an evaluation, under the supervision and with the participation of the Company's Chief Executive Officer and Chief Financial Officer of the effectiveness of the design and operation of the Company's disclosure controls and procedures (as defined in Rules 13a-15(e) and 15d-15(e) under the Securities Exchange Act of 1934, as amended (the "Exchange Act")) as of the end of the period covered by this Form 10-Q (the "Evaluation Date"). Based upon the evaluation, the Company's Chief Executive Officer and Chief Financial Officer concluded that, as of the Evaluation Date, the Company's disclosure controls and procedures were effective to ensure that information required to be disclosed by the Company in the reports filed or submitted by it under the Exchange Act is recorded, processed, summarized and reported within time periods specified in the Securities and Exchange Commission rules and forms and is accumulated and communicated to management, including the Chief Executive Officer and Chief Financial Officer, or persons performing similar functions, as appropriate to allow timely decisions regarding required disclosure. In designing and evaluating the disclosure controls and procedures, the Company’s management recognized that any controls and procedures, no matter how well designed and operated, can provide only reasonable assurance of achieving the desired control objectives, and in reaching a reasonable level of assurance, the Company’s management necessarily was required to apply its judgment in evaluating the cost-benefit relationship of possible controls and procedures.

Changes in Internal Control Over Financial Reporting

There were no changes in the Company's "internal control over financial reporting" (as defined in Rule 13a-15(f) under the Exchange Act) that occurred during its most recently completed fiscal quarter ended March 31, 2024 that have materially affected, or are reasonably likely to materially affect, its internal control over financial reporting.

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PART II. OTHER INFORMATION

ITEM 1. LEGAL PROCEEDINGS.

We are currently a party to legal proceedings in various federal and state jurisdictions arising out of the operation of the Company's business. The amount of alleged liability, if any, from these proceedings cannot be determined with certainty; however, we believe that the Company's ultimate liability, if any, arising from the pending legal proceedings, as well as from asserted legal claims and known potential legal claims which are probable of assertion, taking into account established accruals for estimated liabilities, should not be material to our financial condition or results of operations. In addition, we carry various forms of aviation, commercial, property and casualty, cybersecurity, product liability, and other forms of insurance; however, such insurance may not be applicable or adequate to cover the costs associated with a judgment against us.

For more information on various legal proceedings, see the discussion in Note H to our Consolidated Financial Statements included in Part I, Item 1, of this Form 10-Q. The information set forth therein related to legal proceedings is incorporated into this Item 3 by reference.

ITEM 1A. RISK FACTORS.

The Company faces risks that could adversely affect its condition or results of operations. There have been no material changes to the Company's risk factors from the information disclosed in Item 1A of the Company's 2023 Form 10-K. Other risks that are currently unknown to management or are currently considered immaterial or unlikely, could also adversely affect the Company.

ITEM 2. UNREGISTERED SALES OF EQUITY SECURITIES, USE OF PROCEEDS AND ISSUER PURCHASES OF EQUITY SECURITIES.

On July 27, 2023, the Board authorized the repurchase of up to $120.0 million of ATSG's outstanding common stock (the "2023 Repurchase Program") exclusively in conjunction with a convertible bond offering that the Company was marketing at that time. The 2023 Repurchase Program is separate from the 2022 Repurchase Program described below. The Company subsequently purchased shares in August 2023. The remaining available authorization under the 2023 Repurchase Program is $1.5 million which can only be used in conjunction with the repurchase of our 2017 Convertible Notes.

In addition, on November 29, 2022, the Board of Directors of ATSG (the "Board") authorized the repurchase of up to $150.0 million of ATSG's outstanding common stock (the "2022 Repurchase Program"). The 2022 Repurchase Program does not require the repurchase of a specific number of shares or establish a time frame for any repurchase and the Board may terminate the 2022 Repurchase Program at any time. Repurchases may be made under the 2022 Repurchase Program from time to time in the open market or in privately negotiated transactions. There is no expiration date for the 2022 Repurchase Program. The Company did not purchase any ATSG common stock under the 2022 Repurchase Program during the first quarter of 2024. As of March 31, 2024, the remaining available authorization under the 2022 Repurchase Program was $103.5 million.

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ITEM 5. OTHER INFORMATION

During the quarter ended March 31, 2024, no director or officer (as defined under Rule 16a-1 of the Exchange Act) of the Company adopted or terminated any Rule 10b5-1 trading arrangements or any non-Rule 10b5-1 trading arrangements (in each case, as defined in Item 408(a) of Regulation S-K).

ITEM 6. EXHIBITS.

The following exhibits are filed with or incorporated by reference into this report.

Exhibit No.	Description of Exhibit
	Material Contracts

10.1	Air Transport Services Group, Inc. Executive Incentive Compensation Plan. (1)

10.2	Form of Time-Based Restricted Stock Award Agreement under the Air Transport Services Group, Inc. Amended and Restated 2015 Long-Term Incentive Plan. (1)

	Certifications

31.1	Certification Pursuant to Section 302 of the Sarbanes-Oxley Act of 2002, filed herewith.

31.2	Certification Pursuant to Section 302 of the Sarbanes-Oxley Act of 2002, filed herewith.

32.1	Certification Pursuant to 18 U.S.C. Section 1350, as Adopted Pursuant to Section 906 of the Sarbanes-Oxley Act of 2002, filed herewith.

32.2	Certification Pursuant to 18 U.S.C. Section 1350, as Adopted Pursuant to Section 906 of the Sarbanes-Oxley Act of 2002, filed herewith.

101.INS	Inline XBRL Instance Document

101.SCH	Inline XBRL Taxonomy Extension Schema Document

101.CAL	Inline XBRL Taxonomy Extension Calculation Linkbase Document

101.DEF	Inline XBRL Taxonomy Extension Definition Linkbase Document

101.LAB	Inline XBRL Taxonomy Extension Labels Linkbase Document

101.PRE	Inline XBRL Taxonomy Extension Presentation Linkbase Document

104	Cover Page Interactive Date File (formatted as inline XBRL and contained in Exhibit 101).

(1)	Incorporated by reference to the Company's Form 8-K filed with the Securities and Exchange Commission on February 23, 2024.

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SIGNATURES

Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned thereunto duly authorized.

		AIR TRANSPORT SERVICES GROUP, INC.,
		a Delaware Corporation
		Registrant

		/S/ JOSEPH C. HETE
		Joseph C. Hete
		Chief Executive Officer (Principal Executive Officer)
Date:	May 9, 2024

		/S/ QUINT O. TURNER
		Quint O. Turner
		Chief Financial Officer (Principal Financial Officer
Date:	May 9, 2024	and Principal Accounting Officer)

Exhibit 31.1

CERTIFICATION PURSUANT TO

SECTION 302 OF THE SARBANES-OXLEY ACT OF 2002

I, Joseph C. Hete, certify that:

1.	I have reviewed this report on Form 10-Q of Air Transport Services Group, Inc.;

2.	Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances under which such statements were made, not misleading with respect to the period covered by this report;

3.	Based on my knowledge, the financial statements, and other financial information included in this report, fairly present in all material respects the financial condition, results of operations and cash flows of the registrant as of, and for, the periods presented in this report;

The registrant's other certifying officers and I are responsible for establishing and maintaining disclosure controls and procedures (as defined in Exchange Act Rules 13a-15(e) and 15d-15(e)) and internal control over financial reporting (as defined in Exchange Act Rules 13a-15(f) and 15d-15(f)) for the registrant and have:

Designed such disclosure controls and procedures, or caused such disclosure controls and procedures to be designed under our supervision, to ensure that material information relating to the registrant, including its consolidated subsidiaries, is made known to us by others within those entities, particularly during the period in which this report is being prepared;

Designed such internal control over financial reporting, or caused such internal control over financial reporting to be designed under our supervision, to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with generally accepted accounting principles;

Evaluated the effectiveness of the registrant's disclosure controls and procedures and presented in this report our conclusions about the effectiveness of the disclosure controls and procedures, as of the end of the period covered by this report based on such evaluation; and

Disclosed in this report any change in the registrant's internal control over financial reporting that occurred during the registrant's most recent fiscal quarter that has materially affected, or is reasonably likely to materially affect, the registrant's internal control over financial reporting; and

5.	The registrant's other certifying officer(s) and I have disclosed, based on our most recent evaluation of internal control over financial reporting, to the registrant's auditors and the audit committee of the registrant's board of directors (or persons performing the equivalent functions):

All significant deficiencies and material weaknesses in the design or operation of internal control over financial reporting which are reasonably likely to adversely affect the registrant's ability to record, process, summarize and report financial information; and

Any fraud, whether or not material, that involves management or other employees who have a significant role in the registrant's internal control over financial reporting.

Date: May 9, 2024

/s/ JOSEPH C. HETE
Joseph C. Hete
Chief Executive Officer

Exhibit 31.2

CERTIFICATION PURSUANT TO

SECTION 302 OF THE SARBANES-OXLEY ACT OF 2002

I, Quint O. Turner, certify that:

1.	I have reviewed this report on Form 10-Q of Air Transport Services Group, Inc.;

2.	Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances under which such statements were made, not misleading with respect to the period covered by this report;

3.	Based on my knowledge, the financial statements, and other financial information included in this report, fairly present in all material respects the financial condition, results of operations and cash flows of the registrant as of, and for, the periods presented in this report;

5.	The registrant's other certifying officer(s) and I have disclosed, based on our most recent evaluation of internal control over financial reporting, to the registrant's auditors and the audit committee of the registrant's board of directors (or persons performing the equivalent functions):

Any fraud, whether or not material, that involves management or other employees who have a significant role in the registrant's internal control over financial reporting.

Date: May 9, 2024

/s/ QUINT O. TURNER
Quint O. Turner
Chief Financial Officer (Principal Financial and Accounting Officer)

Exhibit 32.1

CERTIFICATION PURSUANT TO

18 U.S.C. SECTION 1350,

AS ADOPTED PURSUANT TO

SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002

In connection with the Quarterly Report of Air Transport Services Group, Inc. (the “Company”) on Form 10-Q for the period ending March 31, 2024 as filed with the Securities and Exchange Commission on the date hereof (the “Report”), I, Joseph C. Hete, Chief Executive Officer of the Company, certify, pursuant to 18 U.S.C. 1350, as enacted by § 906 of the Sarbanes-Oxley Act of 2002, that:

(1)

The Report fully complies with the requirements of section 13(a) or 15(d) of the Securities Exchange Act of 1934; and

(2)

The information contained in the Report fairly presents, in all material respects, the financial condition and results of operations of the Company.

A signed original of this written statement required by Section 906 has been provided to Air Transport Services Group, Inc. and will be retained by Air Transport Services Group, Inc. and furnished to the Securities and Exchange Commission or its staff upon request.

/S/ JOSEPH C. HETE
Joseph C. Hete Chief Executive Officer

Date: May 9, 2024

Exhibit 32.2

CERTIFICATION PURSUANT TO

18 U.S.C. SECTION 1350,

AS ADOPTED PURSUANT TO

SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002

In connection with the Quarterly Report of Air Transport Services Group, Inc. (the “Company”) on Form 10-Q for the period ending March 31, 2024 as filed with the Securities and Exchange Commission on the date hereof (the “Report”), I, Quint O. Turner, Chief Financial Officer of the Company, certify, pursuant to 18 U.S.C. 1350, as enacted by § 906 of the Sarbanes-Oxley Act of 2002, that:

(1)

The Report fully complies with the requirements of section 13(a) or 15(d) of the Securities Exchange Act of 1934; and

(2)

The information contained in the Report fairly presents, in all material respects, the financial condition and results of operations of the Company.

/s/ QUINT O. TURNER
Quint O. Turner Chief Financial Officer

Date: May 9, 2024

Document And Entity Information - shares	3 Months Ended
Document And Entity Information - shares	Mar. 31, 2024	May 09, 2024
Document Information [Line Items]
Entity Central Index Key	0000894081
Entity Registrant Name	Air Transport Services Group, Inc.
Amendment Flag	false
Current Fiscal Year End Date	--12-31
Document Fiscal Period Focus	FY
Document Fiscal Year Focus	2024
Document Type	10-Q
Document Quarterly Report	true
Document Period End Date	Mar. 31, 2024
Document Transition Report	false
Entity File Number	000-50368
Entity Incorporation, State or Country Code	DE
Entity Tax Identification Number	26-1631624
Entity Address, Address Line One	145 Hunter Drive
Entity Address, City or Town	Wilmington
Entity Address, State or Province	OH
Entity Address, Postal Zip Code	45177
City Area Code	937
Local Phone Number	382-5591
Title of 12(b) Security	Common Stock, par value $0.01 per share
Trading Symbol	ATSG
Security Exchange Name	NASDAQ
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Filer Category	Large Accelerated Filer
Entity Small Business	false
Entity Emerging Growth Company	false
Entity Shell Company	false
Entity Common Stock, Shares Outstanding		65,723,557

Unaudited Condensed Consolidated Balance Sheets - USD ($) $ in Thousands	Mar. 31, 2024	Dec. 31, 2023
CURRENT ASSETS:
Cash, cash equivalents and restricted cash	$ 23,181	$ 53,555
Accounts receivable, net of allowance of $1,193 in 2024 and $1,065 in 2023	219,946	215,581
Inventory	49,847	49,939
Prepaid supplies and other	22,386	26,626
TOTAL CURRENT ASSETS	315,360	345,701
Property and equipment, net	2,866,335	2,820,769
Customer incentive	57,049	60,961
Goodwill and acquired intangibles	479,874	482,427
Operating lease assets	49,140	54,060
Other assets	123,979	118,172
TOTAL ASSETS	3,891,737	3,882,090
CURRENT LIABILITIES:
Accounts payable	249,828	227,652
Accrued salaries, wages and benefits	55,271	56,650
Accrued expenses	9,786	10,784
Current portion of debt obligations	54,768	54,710
Current portion of lease obligations	18,947	20,167
Unearned revenue	31,075	30,226
TOTAL CURRENT LIABILITIES	419,675	400,189
Long term debt	1,663,006	1,707,572
Stock obligations	1,626	1,729
Post-retirement obligations	17,504	19,368
Long-term lease obligation	31,250	34,990
Other liabilities	89,235	64,292
Deferred income taxes	288,016	285,248
TOTAL LIABILITIES	2,510,312	2,513,388
Commitments and contingencies (Note H)
STOCKHOLDERS’ EQUITY:
Preferred stock, 20,000,000 shares authorized, including 75,000 Series A Junior Participating Preferred Stock	0	0
Common stock, par value $0.01 per share; 150,000,000 shares authorized; 65,702,385 and 65,240,961 shares issued and outstanding in 2024 and 2023, respectively	657	652
Additional paid-in capital	838,402	836,270
Retained earnings	597,828	589,209
Accumulated other comprehensive loss	(55,462)	(57,429)
TOTAL STOCKHOLDERS’ EQUITY	1,381,425	1,368,702
TOTAL LIABILITIES AND STOCKHOLDERS’ EQUITY	$ 3,891,737	$ 3,882,090

Unaudited Condensed Consolidated Balance Sheets (Parentheticals) - USD ($) $ in Thousands	Mar. 31, 2024	Dec. 31, 2023
Accounts Receivable, Allowance for Credit Loss,	$ 1,193	$ 1,065
Preferred Stock, Shares Authorized (in shares)	20,000,000	20,000,000
Common Stock, Par Value (in dollars per share)	$ 0.01	$ 0.01
Common Stock, Shares Authorized (in shares)	150,000,000	150,000,000
Common Stock, Shares, Issued (in shares)	65,702,385	65,240,961
Common Stock, Shares, Outstanding (in shares)	65,702,385	65,240,961
Series A Preferred Stock [Member]
Preferred Stock, Shares Authorized (in shares)	75,000	75,000

Unaudited Condensed Consolidated Statements of Operations - USD ($) shares in Thousands, $ in Thousands	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
REVENUES	$ 485,517	$ 501,095
OPERATING EXPENSES
Salaries, wages and benefits	171,482	176,715
Depreciation and amortization	90,380	84,728
Maintenance, materials and repairs	49,883	43,833
Fuel	63,545	66,755
Contracted ground and aviation services	15,706	17,788
Travel	30,446	29,553
Landing and ramp	4,030	4,124
Rent	7,532	8,112
Insurance	2,736	2,548
Other operating expenses	16,773	19,516
Costs and Expenses	452,513	453,672
OPERATING INCOME	33,004	47,423
OTHER INCOME (EXPENSE)
Interest income	239	215
Non-service component of retiree benefit costs	(1,085)	(3,218)
Net gain (loss) on financial instruments	2,355	(1,740)
Loss from non-consolidated affiliate	(79)	(406)
Interest expense	(21,988)	(15,705)
Nonoperating Income (Expense)	(20,558)	(20,854)
EARNINGS FROM CONTINUING OPERATIONS BEFORE INCOME TAXES	12,446	26,569
INCOME TAX EXPENSE	(3,827)	(6,428)
EARNINGS FROM CONTINUING OPERATIONS	8,619	20,141
EARNINGS FROM DISCONTINUED OPERATIONS, NET OF TAXES	0	0
NET EARNINGS	$ 8,619	$ 20,141
BASIC EARNINGS PER SHARE
Continuing operations (in dollars per share)	$ 0.13	$ 0.28
Discontinued operations (in dollars per share)	0	0
TOTAL BASIC EARNINGS PER SHARE (in dollars per share)	0.13	0.28
DILUTED EARNINGS PER SHARE
Continuing operations (in dollars per share)	0.13	0.25
Discontinued operations (in dollars per share)	0	0
TOTAL DILUTED EARNINGS PER SHARE (in dollars per share)	$ 0.13	$ 0.25
WEIGHTED AVERAGE SHARES
Basic (in shares)	64,973	71,802
Diluted (in shares)	67,235	83,057

Unaudited Condensed Consolidated Statements of Comprehensive Income - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
NET EARNINGS	$ 8,619	$ 20,141
OTHER COMPREHENSIVE INCOME:
TOTAL COMPREHENSIVE INCOME, net of tax	10,586	23,846
Pension Plan [Member]
OTHER COMPREHENSIVE INCOME:
Defined Benefit Plan	1,984	3,705
Other Postretirement Benefits Plan [Member]
OTHER COMPREHENSIVE INCOME:
Defined Benefit Plan	$ (17)	$ 0

Unaudited Condensed Consolidated Statements of Stockholders' Equity - USD ($) $ in Thousands	Common Stock [Member]	Additional Paid-in Capital [Member]	Retained Earnings [Member]	AOCI Attributable to Parent [Member]	Total
BALANCE (in shares) at Dec. 31, 2022	72,327,758,000
Balance as of January 1, 2023 at Dec. 31, 2022	$ 723	$ 986,303	$ 528,882	$ (103,402)	$ 1,412,506
Issuance of common shares, net of withholdings (in shares)	124,152,000
Issuance of common shares, net of withholdings	$ 2	(1,555)			(1,553)
Forfeited restricted stock (in shares)	(300,000)
Forfeited restricted stock	$ 0	0			0
Purchase of common stock (in shares)	(1,000,000,000)
Purchase of common stock	$ (10)	(22,127)			(22,137)
Amortization of stock awards and restricted stock		1,405			1,405
Total comprehensive income			20,141	3,705	23,846
BALANCE (in shares) at Mar. 31, 2023	71,451,610,000
Balance as of March 31, 2023 at Mar. 31, 2023	$ 715	964,026	549,023	(99,697)	1,414,067
BALANCE (in shares) at Dec. 31, 2023	65,240,961
Balance as of January 1, 2023 at Dec. 31, 2023	$ 652	836,270	589,209	(57,429)	1,368,702
Issuance of common shares, net of withholdings (in shares)	38,824
Issuance of common shares, net of withholdings	$ 1	(464)			(463)
Forfeited restricted stock (in shares)	(4,800)
Forfeited restricted stock	$ 0	0			0
Amortization of stock awards and restricted stock		2,600			2,600
Total comprehensive income			8,619	1,967	10,586
Grant of restricted stock (in shares)	427,400
Grant of restricted stock	$ 4	(4)			0
BALANCE (in shares) at Mar. 31, 2024	65,702,385
Balance as of March 31, 2023 at Mar. 31, 2024	$ 657	$ 838,402	$ 597,828	$ (55,462)	$ 1,381,425

Unaudited Condensed Consolidated Statements of Cash Flows - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
OPERATING ACTIVITIES:
Net earnings from continuing operations	$ 8,619	$ 20,141
Adjustments to reconcile net earnings to net cash provided by operating activities:
Depreciation and amortization	94,965	90,936
Pension and post-retirement	2,571	4,745
Deferred income taxes	2,276	4,768
Amortization of stock-based compensation	2,600	1,405
Loss from non-consolidated affiliates	79	406
Net (gain) loss on financial instruments	(2,355)	1,740
Changes in assets and liabilities:
Accounts receivable	(5,704)	74,500
Inventory and prepaid supplies	924	(1,361)
Accounts payable	1,226	13,321
Unearned revenue	518	13,361
Accrued expenses, salaries, wages, benefits and other liabilities	23,311	(4,643)
Pension and post-retirement balances	(2,437)	(2,452)
Other	(173)	(489)
NET CASH PROVIDED BY OPERATING ACTIVITIES	126,420	216,378
INVESTING ACTIVITIES:
Expenditures for property and equipment	(102,321)	(218,801)
Proceeds from property and equipment	895	9,860
Acquisitions and investments in businesses	(9,800)	(800)
NET CASH (USED IN) INVESTING ACTIVITIES	(111,226)	(209,741)
FINANCING ACTIVITIES:
Principal payments on long term obligations	(140,105)	(25,214)
Proceeds from revolving credit facilities	95,000	105,000
Payments for financing costs	0	(484)
Purchase of common stock	0	(21,918)
Withholding taxes paid for conversion of employee stock awards	(463)	(1,553)
NET CASH (USED IN) PROVIDED BY FINANCING ACTIVITIES	(45,568)	55,831
NET INCREASE (DECREASE) IN CASH AND CASH EQUIVALENTS	(30,374)	62,468
CASH AND CASH EQUIVALENTS AT BEGINNING OF YEAR	53,555	27,134
CASH AND CASH EQUIVALENTS AT END OF YEAR	23,181	89,602
SUPPLEMENTAL CASH FLOW INFORMATION:
Interest paid, net of amount capitalized	31,622	11,652
Federal and state income taxes paid	28	60
Restricted balance of cash	11,459	1,997
SUPPLEMENTAL NON-CASH INFORMATION:
Accrued expenditures for property and equipment	$ 62,653	$ 68,338

Note A - Summary of Financial Statement Preparation and Significant Accounting Policies

3 Months Ended

Mar. 31, 2024

Notes to Financial Statements

Organization, Consolidation and Presentation of Financial Statements Disclosure and Significant Accounting Policies [Text Block]

NOTE A—SUMMARY OF FINANCIAL STATEMENT PREPARATION AND SIGNIFICANT ACCOUNTING POLICIES

Nature of Operations

Basis of Presentation

Accounting Standards Updates

Note B - Goodwill, Intangibles and Equity Investments

3 Months Ended

Mar. 31, 2024

Notes to Financial Statements

Goodwill, Intangible Assets and Equity Investments [Text Block]

NOTE B—GOODWILL, INTANGIBLES AND EQUITY INVESTMENTS

The carrying amounts of goodwill by reportable segment are as follows (in thousands):

	*CAM*		*ACMI Services*		*All Other*		*Total*
Carrying value as of December 31, 2023	$	153,290	$	234,571	$	8,113	$	395,974
Carrying value as of March 31, 2024	$	153,290	$	234,571	$	8,113	$	395,974

The Company's acquired intangible assets are as follows (in thousands):

	*Airline*		*Amortizing*
	*Certificates*		*Intangibles*			*Total*
Carrying value as of December 31, 2023	$	9,000	$	77,453		$	86,453
Amortization		—		(2,553	)		(2,553	)
Carrying value as of March 31, 2024	$	9,000	$	74,900		$	83,900

	*Lease*
	*Incentive*
Carrying value as of December 31, 2023	$	60,961
Amortization		(3,912	)
Carrying value as of March 31, 2024	$	57,049

Note C - Significant Customers

3 Months Ended

Mar. 31, 2024

Notes to Financial Statements

Concentration Risk Disclosure [Text Block]

NOTE C—SIGNIFICANT CUSTOMERS

	*Three Months Ended*
	*March 31,*
	*2024*			*2023*
Customer	*Percentage of Revenue*
DoD		28	%		29	%
Amazon		34	%		35	%
DHL		13	%		14	%

The accounts receivable from the Company's three largest customers as of March 31, 2024 and December 31, 2023 are as follows (in thousands):

	*March 31, 2024*		*December 31, 2023*
Customer	*Accounts Receivable*
DoD	$	64,050	$	56,848
Amazon		83,209		74,509
DHL		9,777		8,040

DoD

DHL

Amazon

Amazon Investment Agreement

Issued and outstanding warrants are summarized below as of March 31, 2024:

			*Common Shares in millions*
	*Exercise price*		*Vested*		*Non-Vested*		*Expiration*

2018 Investment Agreement	$	21.53		14.8		0.0	December 20, 2025
2018 Investment Agreement	$	20.40		7.0		0.0	December 20, 2025

Subsequent Event

Note D - Fair Value Measurements

3 Months Ended

Mar. 31, 2024

Notes to Financial Statements

Fair Value Disclosures [Text Block]

NOTE D—FAIR VALUE MEASUREMENTS

The following table reflects assets and liabilities that are measured at fair value on a recurring basis (in thousands):

As of March 31, 2024	*Fair Value Measurement Using*
	*Level 1*		*Level 2*		*Level 3*			*Total*
Assets
Cash equivalents—money market	$	—	$	1,318	$	—		$	1,318
Interest rate swap		—		1,723		—			1,723
Total Assets	$	—	$	3,041	$	—		$	3,041
Liabilities
Sale option		—		—		(1,258	)		(1,258	)
Stock warrant obligations		—		—		(368	)		(368	)
Total Liabilities	$	—	$	—	$	(1,626	)	$	(1,626	)

As of December 31, 2023	*Fair Value Measurement Using*
	*Level 1*		*Level 2*			*Level 3*			*Total*
Assets
Cash equivalents—money market	$	—	$	1,248		$	—		$	1,248
Interest rate swap		—		—			—			—
Total Assets	$	—	$	1,248		$	—		$	1,248
Liabilities
Interest rate swap		—		(529	)		—			(529	)
Sale Option		—		—			(1,258	)		(1,258	)
Stock warrant obligations		—		—			(471	)		(471	)
Total Liabilities	$	—	$	(529	)	$	(1,729	)	$	(2,258	)

Note E - Property and Equipment

3 Months Ended

Mar. 31, 2024

Notes to Financial Statements

Property, Plant and Equipment Disclosure [Text Block]

NOTE E—PROPERTY AND EQUIPMENT

	*March 31,*			*December 31,*
	*2024*			*2023*
Flight equipment	$	4,055,379		$	3,865,049
Ground equipment		72,653			72,463
Leasehold improvements, facilities and office equipment		43,659			42,120
Aircraft modifications and projects in progress		551,630			638,631
		4,723,321			4,618,263
Accumulated depreciation		(1,856,986	)		(1,797,494	)
Property and equipment, net	$	2,866,335		$	2,820,769

CAM owned aircraft with a carrying value of $1,715.4 million and $1,640.9 million that were under lease to external customers as of March 31, 2024 and December 31, 2023, respectively.

Note F - Debt Obligations

3 Months Ended

Mar. 31, 2024

Notes to Financial Statements

Debt Disclosure [Text Block]

NOTE F—DEBT OBLIGATIONS

Debt obligations consisted of the following (in thousands):

	*March 31, 2024*			*December 31, 2023*
Revolving credit facility		685,000			730,000
Senior notes		578,694			578,574
Convertible notes		444,897			444,420
Other financing arrangements		9,183			9,288
Total debt obligations		1,717,774			1,762,282
Less: current portion		(54,768	)		(54,710	)
Total long term obligations, net	$	1,663,006		$	1,707,572

The carrying value of the Company's convertible debt is shown below (in thousands):

	*2017 Convertible Notes*			*2023 Convertible Notes*			*Total Convertible Notes*
Principal Value December 31, 2023		54,225			400,000			454,225
Unamortized issuance cost		(110	)		(9,218	)		(9,328	)
Convertible Debt March 31, 2024		54,115			390,782			444,897

Note G - Derivative Instruments

3 Months Ended

Mar. 31, 2024

Notes to Financial Statements

Derivative Instruments and Hedging Activities Disclosure [Text Block]

NOTE G—DERIVATIVE INSTRUMENTS

The Company maintains derivative instruments for protection from fluctuating interest rates. The table below provides information about the Company’s interest rate swaps (in thousands):

				*March 31, 2024*				*December 31, 2023*
	*Stated*					*Market*				*Market*
	*Interest*			*Notional*		*Value*		*Notional*		*Value*
Expiration Date	*Rate*			*Amount*		*(Liability)*		*Amount*		*(Liability)*
March 31, 2026		3.793	%		50,000		665		50,000		237
March 31, 2026		3.836	%		50,000		700		50,000		189
June 30, 2026		4.257	%		50,000		116		50,000		(525	)
June 30, 2026		4.185	%		50,000		242		50,000		(430	)

Note H - Commitments and Contingencies

3 Months Ended

Mar. 31, 2024

Notes to Financial Statements

Commitments Contingencies and Guarantees [Text Block]

NOTE H—COMMITMENTS AND CONTINGENCIES

Lease Commitments

	*Operating Leases*
2024	$	16,115
2025		15,659
2026		8,962
2027		4,673
2028		3,526
2029 and beyond		5,730
Total undiscounted cash payments		54,665
Less: amount representing interest		(4,468	)
Present value of future minimum lease payments		50,197
Less: current obligations under leases		18,947
Long-term lease obligation	$	31,250

Purchase Commitments

Guarantees and Indemnifications

Other

Employees Under Collective Bargaining Agreements

As of March 31, 2024, the flight crewmember employees of ABX, ATI and OAI and flight attendant employees of ATI and OAI were represented by the labor unions listed below:

		*Percentage of*
		*the Company’s*
Airline	*Labor Agreement Unit*	*Employees*
ABX	International Brotherhood of Teamsters	5.1	%
ATI	Air Line Pilots Association	11.7	%
OAI	International Brotherhood of Teamsters	6.4	%
ATI	Association of Flight Attendants	0.8	%
OAI	Association of Flight Attendants	6.6	%

In addition, OAI has less than 20 flight dispatchers that are represented by a recognized labor unit and are beginning to negotiate a collective bargaining agreement.

Note I - Pension and Other Post-retirement Benefit Plans

3 Months Ended

Mar. 31, 2024

Notes to Financial Statements

Retirement Benefits [Text Block]

NOTE I—PENSION AND OTHER POST-RETIREMENT BENEFIT PLANS

Defined Benefit and Post-retirement Healthcare Plans

	*Three Months Ended March 31,*
	*Pension Plans*						*Post-Retirement Healthcare Plan*
	*2024*			*2023*			*2024*			*2023*
Service cost	$	—		$	—		$	5		$	13
Interest cost		6,614			8,631			23			33
Expected return on plan assets		(8,122	)		(10,192	)		—			—
Amortization of net loss		2,594			4,745			(23	)		—
Net periodic benefit cost (income)	$	1,086		$	3,184		$	5		$	46

Note J - Income Taxes

3 Months Ended

Mar. 31, 2024

Notes to Financial Statements

Income Tax Disclosure [Text Block]

NOTE J—INCOME TAXES

Note K - Accumulated Other Comprehensive Income (Loss)

3 Months Ended

Mar. 31, 2024

Notes to Financial Statements

Comprehensive Income (Loss) Note [Text Block]

NOTE K—ACCUMULATED OTHER COMPREHENSIVE INCOME (LOSS)

Accumulated other comprehensive income (loss) includes the following items by components for the three month periods ended March 31, 2024 and 2023 (in thousands):

	*Defined Benefit*			*Defined Benefit*			*Foreign Currency*
	*Pension*			*Post-Retirement*			*Translation*			*Total*
Balance as of January 1, 2023	$	(103,418	)	$	36		$	(20	)	$	(103,402	)
Amounts reclassified from accumulated other comprehensive income:
Actuarial costs (reclassified to salaries, wages and benefits)		4,745			—			—			4,745
Income Tax (Expense) or Benefit		(1,040	)		—			—			(1,040	)
Other comprehensive income (loss), net of tax		3,705			—			—			3,705
Balance as of March 31, 2023	$	(99,713	)	$	36		$	(20	)	$	(99,697	)
Balance as of January 1, 2024	$	(57,931	)	$	502		$	—		$	(57,429	)
Amounts reclassified from accumulated other comprehensive income:
Actuarial costs (reclassified to salaries, wages and benefits)		2,594			(23	)		—			2,571
Income Tax (Expense) or Benefit		(610	)		6			—			(604	)
Other comprehensive income (loss), net of tax		1,984			(17	)		—			1,967
Balance as of March 31, 2024	$	(55,947	)	$	485		$	—		$	(55,462	)

Note L- Stock-based Compensation

3 Months Ended

Mar. 31, 2024

Notes to Financial Statements

Share-Based Payment Arrangement [Text Block]

NOTE L—STOCK-BASED COMPENSATION

	*March 31, 2024*					*March 31, 2023*
				*Weighted*					*Weighted*
				*average*					*average*
	*Number of*			*grant-date*		*Number of*			*grant-date*
	*Awards*			*fair value*		*Awards*			*fair value*
Outstanding at beginning of period		1,066,784		$	20.19		929,205		$	21.83
Granted		926,984			12.37		—			—
Converted		(71,359	)		25.71		(186,828	)		20.87
Expired		—			—		—			—
Forfeited		(9,600	)		26.90		(600	)		36.93
Outstanding at end of period		1,912,809		$	16.16		741,777		$	22.04
Vested		496,838		$	10.80		298,928		$	8.02

	*2024*
Risk-free interest rate	4.4	%
Volatility	43.0	%

Note M - Common Stock and Earnings Per Share

3 Months Ended

Mar. 31, 2024

Notes to Financial Statements

Earnings Per Share [Text Block]

NOTE M—COMMON STOCK AND EARNINGS PER SHARE

Earnings per Share

The calculation of basic and diluted earnings per common share is as follows (in thousands, except per share amounts):

	*Three Months Ended*
	*March 31,*
	*2024*		*2023*
Numerator:
Earnings from continuing operations - basic	$	8,619	$	20,141
Gain from stock warrants revaluation, net of tax	$	—	$	(108	)
Convertible debt interest charge, net of tax	$	159	$	776
Earnings from continuing operations - diluted	$	8,778	$	20,809

Denominator:
Weighted-average shares outstanding for basic earnings per share		64,973		71,802
Common equivalent shares:
Effect of stock-based compensation awards and warrants		562		3,144
Effect of convertible debt		1,700		8,111
Weighted-average shares outstanding assuming dilution		67,235		83,057
Basic earnings per share from continuing operations	$	0.13	$	0.28
Diluted earnings per share from continuing operations	$	0.13	$	0.25

Note N - Segment and Revenue Information

3 Months Ended

Mar. 31, 2024

Notes to Financial Statements

Segment Reporting and Revenue Disclosure [Text Block]

NOTE N—SEGMENT AND REVENUE INFORMATION

The Company's segment information from continuing operations is presented below (in thousands):

	*Three Months Ended*
	*March 31,*
	*2024*			*2023*
Total revenues:
CAM	$	105,549		$	112,044
ACMI Services		323,824			334,127
All other		109,040			110,588
Eliminate inter-segment revenues		(52,896	)		(55,664	)
Total	$	485,517		$	501,095
Customer revenues:
CAM	$	79,591		$	83,158
ACMI Services		323,711			334,113
All other		82,215			83,824
Total	$	485,517		$	501,095

The Company's external customer revenues from other activities for the three month period ended March 31, 2024, and 2023 are presented below (in thousands):

	*Three Months Ended*
	*March 31,*
	*2024*		*2023*
Aircraft maintenance, modifications and part sales	$	40,348	$	42,073
Ground services		23,221		23,665
Other, including aviation fuel sales		18,646		18,086
Total customer revenues	$	82,215	$	83,824

The Company's other segment information from continuing operations is presented below (in thousands):

	*Three Months Ended*
	*March 31,*
	*2024*			*2023*
Depreciation and amortization expense:
CAM	$	65,373		$	60,397
ACMI Services		24,249			23,621
All other		758			710
Total	$	90,380		$	84,728
Interest expense
CAM		15,280			10,022
ACMI Services		5,493			4,958
Segment earnings (loss):
CAM	$	13,409		$	34,200
ACMI Services		(3,485	)		(2,411	)
All other		2,307			654
Net unallocated interest expense		(976	)		(510	)
Net gain (loss) on financial instruments		2,355			(1,740	)
Other non-service components of retiree benefit costs, net		(1,085	)		(3,218	)
Loss from non-consolidated affiliate		(79	)		(406	)
Pre-tax earnings from continuing operations	$	12,446		$	26,569

The Company's assets are presented below by segment (in thousands). Cash and cash equivalents are reflected in Assets - All other.

	*March 31,*		*December 31,*
	*2024*		*2023*
Assets:
CAM	$	2,929,853	$	2,885,508
ACMI Services		829,133		828,703
All other		132,751		167,879
Total	$	3,891,737	$	3,882,090

During the three months ended March 31, 2024, the Company had capital expenditures for property and equipment of $20.7 million and $82.1 million for the ACMI Services and CAM, respectively.

Insider Trading Arrangements	3 Months Ended
Insider Trading Arrangements	Mar. 31, 2024
Insider Trading Arr Line Items
Material Terms of Trading Arrangement [Text Block]	*ITEM 5. OTHER INFORMATION* During the quarter ended March 31, 2024, no director or officer (as defined under Rule 16a-1 of the Exchange Act) of the Company adopted or terminated any Rule 10b5-1 trading arrangements or any non-Rule 10b5-1 trading arrangements (in each case, as defined in Item 408(a) of Regulation S-K).
Rule 10b5-1 Arrangement Terminated [Flag]	false
Non-Rule 10b5-1 Arrangement Terminated [Flag]	false
Rule 10b5-1 Arrangement Adopted [Flag]	false
Non-Rule 10b5-1 Arrangement Adopted [Flag]	false

Significant Accounting Policies (Policies)	3 Months Ended
Significant Accounting Policies (Policies)	Mar. 31, 2024
Accounting Policies [Abstract]
Basis of Accounting, Policy [Policy Text Block]	Basis of Presentation The financial statements of the Company are prepared in accordance with accounting principles generally accepted in the United States of America ("GAAP"). The accompanying unaudited condensed interim consolidated financial statements are prepared in conformity with GAAP and such principles are applied on a basis consistent with the financial statements reflected in our 2023 Form 10-K. Certain information and footnote disclosures normally included in financial statements prepared in accordance with GAAP have been condensed or omitted pursuant to the rules and regulations promulgated by the SEC related to interim financial statements. In the opinion of management, the accompanying financial statements contain all adjustments, including normal recurring adjustments, necessary for the fair presentation of the Company's results of operations and financial position for the periods presented. Due to seasonal fluctuations, among other factors common to the air cargo industry, the results of operations for the periods presented are not necessarily indicative of the results of operations to be expected for the entire year or any interim period. The preparation of consolidated financial statements requires management to make estimates and assumptions that affect amounts reported in the consolidated financial statements. The accounting estimates reflect the best judgment of the management, but actual results could differ materially from those estimates. The accompanying unaudited condensed consolidated financial statements include the accounts of ATSG and its wholly-owned subsidiaries. Inter-company balances and transactions are eliminated. Investments in affiliates in which the Company has significant influence but does not exercise control are accounted for using the equity method of accounting. Under the equity method, the Company's share of the non-consolidated affiliate's income or loss is recognized in the consolidated statement of earnings and cumulative post-acquisition changes in the investment are adjusted against the carrying amount of the investment.
New Accounting Pronouncements, Policy [Policy Text Block]	Accounting Standards Updates In November 2023, the FASB issued ASU No. 2023-07, "Segment Reporting (Topic 280): Improvements to Reportable Segment Disclosures." This standard requires disclosure of significant segment expenses and other segment items by reportable segment. This ASU becomes effective for annual periods beginning in 2024 and interim periods in 2025. The Company is assessing the impact of this ASU and upon adoption expects that any impact would be limited to additional segment expense disclosures in the footnotes to its consolidated financial statements. In December 2023, the FASB issued ASU No. 2023-09, "Income Taxes (Topic 740): Improvements to Income Tax Disclosures." This standard enhances disclosures related to income taxes, including the rate reconciliation and information on income taxes paid. This ASU becomes effective January 1, 2025. The Company is assessing the impact of this ASU and upon adoption expects to include certain additional disclosures in the footnotes to its consolidated financial statements.

Note B - Goodwill, Intangibles and Equity Investments (Tables)

3 Months Ended

Mar. 31, 2024

Notes Tables

Schedule of Goodwill [Table Text Block]

	*CAM*		*ACMI Services*		*All Other*		*Total*
Carrying value as of December 31, 2023	$	153,290	$	234,571	$	8,113	$	395,974
Carrying value as of March 31, 2024	$	153,290	$	234,571	$	8,113	$	395,974

Schedule of Intangible Assets and Goodwill [Table Text Block]

	*Airline*		*Amortizing*
	*Certificates*		*Intangibles*			*Total*
Carrying value as of December 31, 2023	$	9,000	$	77,453		$	86,453
Amortization		—		(2,553	)		(2,553	)
Carrying value as of March 31, 2024	$	9,000	$	74,900		$	83,900

Lease Incentive [Table Text Block]

	*Lease*
	*Incentive*
Carrying value as of December 31, 2023	$	60,961
Amortization		(3,912	)
Carrying value as of March 31, 2024	$	57,049

Note C - Significant Customers (Tables)

3 Months Ended

Mar. 31, 2024

Notes Tables

Disaggregation of Revenue [Table Text Block]

	*Three Months Ended*
	*March 31,*
	*2024*			*2023*
Customer	*Percentage of Revenue*
DoD		28	%		29	%
Amazon		34	%		35	%
DHL		13	%		14	%

Schedules of Concentration of Risk, by Risk Factor [Table Text Block]

	*March 31, 2024*		*December 31, 2023*
Customer	*Accounts Receivable*
DoD	$	64,050	$	56,848
Amazon		83,209		74,509
DHL		9,777		8,040

Schedule of Stockholders' Equity Note, Warrants or Rights [Table Text Block]

			*Common Shares in millions*
	*Exercise price*		*Vested*		*Non-Vested*		*Expiration*

2018 Investment Agreement	$	21.53		14.8		0.0	December 20, 2025
2018 Investment Agreement	$	20.40		7.0		0.0	December 20, 2025

Note D - Fair Value Measurements (Tables)

3 Months Ended

Mar. 31, 2024

Notes Tables

Schedule of Fair Value, Assets and Liabilities Measured on Recurring Basis [Table Text Block]

As of March 31, 2024	*Fair Value Measurement Using*
	*Level 1*		*Level 2*		*Level 3*			*Total*
Assets
Cash equivalents—money market	$	—	$	1,318	$	—		$	1,318
Interest rate swap		—		1,723		—			1,723
Total Assets	$	—	$	3,041	$	—		$	3,041
Liabilities
Sale option		—		—		(1,258	)		(1,258	)
Stock warrant obligations		—		—		(368	)		(368	)
Total Liabilities	$	—	$	—	$	(1,626	)	$	(1,626	)

As of December 31, 2023	*Fair Value Measurement Using*
	*Level 1*		*Level 2*			*Level 3*			*Total*
Assets
Cash equivalents—money market	$	—	$	1,248		$	—		$	1,248
Interest rate swap		—		—			—			—
Total Assets	$	—	$	1,248		$	—		$	1,248
Liabilities
Interest rate swap		—		(529	)		—			(529	)
Sale Option		—		—			(1,258	)		(1,258	)
Stock warrant obligations		—		—			(471	)		(471	)
Total Liabilities	$	—	$	(529	)	$	(1,729	)	$	(2,258	)

Note E - Property and Equipment (Tables)

3 Months Ended

Mar. 31, 2024

Notes Tables

Property, Plant and Equipment [Table Text Block]

	*March 31,*			*December 31,*
	*2024*			*2023*
Flight equipment	$	4,055,379		$	3,865,049
Ground equipment		72,653			72,463
Leasehold improvements, facilities and office equipment		43,659			42,120
Aircraft modifications and projects in progress		551,630			638,631
		4,723,321			4,618,263
Accumulated depreciation		(1,856,986	)		(1,797,494	)
Property and equipment, net	$	2,866,335		$	2,820,769

Note F - Debt Obligations (Tables)

3 Months Ended

Mar. 31, 2024

Notes Tables

Schedule of Long-Term Debt Instruments [Table Text Block]

	*March 31, 2024*			*December 31, 2023*
Revolving credit facility		685,000			730,000
Senior notes		578,694			578,574
Convertible notes		444,897			444,420
Other financing arrangements		9,183			9,288
Total debt obligations		1,717,774			1,762,282
Less: current portion		(54,768	)		(54,710	)
Total long term obligations, net	$	1,663,006		$	1,707,572

Convertible Debt [Table Text Block]

	*2017 Convertible Notes*			*2023 Convertible Notes*			*Total Convertible Notes*
Principal Value December 31, 2023		54,225			400,000			454,225
Unamortized issuance cost		(110	)		(9,218	)		(9,328	)
Convertible Debt March 31, 2024		54,115			390,782			444,897

Note G - Derivative Instruments (Tables)

3 Months Ended

Mar. 31, 2024

Notes Tables

Schedule of Interest Rate Derivatives [Table Text Block]

				*March 31, 2024*				*December 31, 2023*
	*Stated*					*Market*				*Market*
	*Interest*			*Notional*		*Value*		*Notional*		*Value*
Expiration Date	*Rate*			*Amount*		*(Liability)*		*Amount*		*(Liability)*
March 31, 2026		3.793	%		50,000		665		50,000		237
March 31, 2026		3.836	%		50,000		700		50,000		189
June 30, 2026		4.257	%		50,000		116		50,000		(525	)
June 30, 2026		4.185	%		50,000		242		50,000		(430	)

Note H - Commitments and Contingencies (Tables)

3 Months Ended

Mar. 31, 2024

Notes Tables

Lessee, Operating Lease, Liability, to be Paid, Maturity [Table Text Block]

	*Operating Leases*
2024	$	16,115
2025		15,659
2026		8,962
2027		4,673
2028		3,526
2029 and beyond		5,730
Total undiscounted cash payments		54,665
Less: amount representing interest		(4,468	)
Present value of future minimum lease payments		50,197
Less: current obligations under leases		18,947
Long-term lease obligation	$	31,250

Summary of Employee Concentration [Table Text Block]

		*Percentage of*
		*the Company’s*
Airline	*Labor Agreement Unit*	*Employees*
ABX	International Brotherhood of Teamsters	5.1	%
ATI	Air Line Pilots Association	11.7	%
OAI	International Brotherhood of Teamsters	6.4	%
ATI	Association of Flight Attendants	0.8	%
OAI	Association of Flight Attendants	6.6	%

Note I - Pension and Other Post-retirement Benefit Plans (Tables)

3 Months Ended

Mar. 31, 2024

Notes Tables

Schedule of Net Benefit Costs [Table Text Block]

	*Three Months Ended March 31,*
	*Pension Plans*						*Post-Retirement Healthcare Plan*
	*2024*			*2023*			*2024*			*2023*
Service cost	$	—		$	—		$	5		$	13
Interest cost		6,614			8,631			23			33
Expected return on plan assets		(8,122	)		(10,192	)		—			—
Amortization of net loss		2,594			4,745			(23	)		—
Net periodic benefit cost (income)	$	1,086		$	3,184		$	5		$	46

Note K - Accumulated Other Comprehensive Income (Loss) (Tables)

3 Months Ended

Mar. 31, 2024

Notes Tables

Schedule of Accumulated Other Comprehensive Income (Loss) [Table Text Block]

	*Defined Benefit*			*Defined Benefit*			*Foreign Currency*
	*Pension*			*Post-Retirement*			*Translation*			*Total*
Balance as of January 1, 2023	$	(103,418	)	$	36		$	(20	)	$	(103,402	)
Amounts reclassified from accumulated other comprehensive income:
Actuarial costs (reclassified to salaries, wages and benefits)		4,745			—			—			4,745
Income Tax (Expense) or Benefit		(1,040	)		—			—			(1,040	)
Other comprehensive income (loss), net of tax		3,705			—			—			3,705
Balance as of March 31, 2023	$	(99,713	)	$	36		$	(20	)	$	(99,697	)
Balance as of January 1, 2024	$	(57,931	)	$	502		$	—		$	(57,429	)
Amounts reclassified from accumulated other comprehensive income:
Actuarial costs (reclassified to salaries, wages and benefits)		2,594			(23	)		—			2,571
Income Tax (Expense) or Benefit		(610	)		6			—			(604	)
Other comprehensive income (loss), net of tax		1,984			(17	)		—			1,967
Balance as of March 31, 2024	$	(55,947	)	$	485		$	—		$	(55,462	)

Note L- Stock-based Compensation (Tables)

3 Months Ended

Mar. 31, 2024

Notes Tables

Share-Based Payment Arrangement, Activity [Table Text Block]

	*March 31, 2024*					*March 31, 2023*
				*Weighted*					*Weighted*
				*average*					*average*
	*Number of*			*grant-date*		*Number of*			*grant-date*
	*Awards*			*fair value*		*Awards*			*fair value*
Outstanding at beginning of period		1,066,784		$	20.19		929,205		$	21.83
Granted		926,984			12.37		—			—
Converted		(71,359	)		25.71		(186,828	)		20.87
Expired		—			—		—			—
Forfeited		(9,600	)		26.90		(600	)		36.93
Outstanding at end of period		1,912,809		$	16.16		741,777		$	22.04
Vested		496,838		$	10.80		298,928		$	8.02

Schedule of Share-Based Payment Award, Stock Options, Valuation Assumptions [Table Text Block]

	*2024*
Risk-free interest rate	4.4	%
Volatility	43.0	%

Note M - Common Stock and Earnings Per Share (Tables)

3 Months Ended

Mar. 31, 2024

Notes Tables

Schedule of Earnings Per Share, Basic and Diluted [Table Text Block]

	*Three Months Ended*
	*March 31,*
	*2024*		*2023*
Numerator:
Earnings from continuing operations - basic	$	8,619	$	20,141
Gain from stock warrants revaluation, net of tax	$	—	$	(108	)
Convertible debt interest charge, net of tax	$	159	$	776
Earnings from continuing operations - diluted	$	8,778	$	20,809

Denominator:
Weighted-average shares outstanding for basic earnings per share		64,973		71,802
Common equivalent shares:
Effect of stock-based compensation awards and warrants		562		3,144
Effect of convertible debt		1,700		8,111
Weighted-average shares outstanding assuming dilution		67,235		83,057
Basic earnings per share from continuing operations	$	0.13	$	0.28
Diluted earnings per share from continuing operations	$	0.13	$	0.25

Note N - Segment and Revenue Information (Tables)

3 Months Ended

Mar. 31, 2024

Notes Tables

Schedule of Segment Reporting Information, by Segment [Table Text Block]

	*Three Months Ended*
	*March 31,*
	*2024*			*2023*
Total revenues:
CAM	$	105,549		$	112,044
ACMI Services		323,824			334,127
All other		109,040			110,588
Eliminate inter-segment revenues		(52,896	)		(55,664	)
Total	$	485,517		$	501,095
Customer revenues:
CAM	$	79,591		$	83,158
ACMI Services		323,711			334,113
All other		82,215			83,824
Total	$	485,517		$	501,095

	*Three Months Ended*
	*March 31,*
	*2024*			*2023*
Depreciation and amortization expense:
CAM	$	65,373		$	60,397
ACMI Services		24,249			23,621
All other		758			710
Total	$	90,380		$	84,728
Interest expense
CAM		15,280			10,022
ACMI Services		5,493			4,958
Segment earnings (loss):
CAM	$	13,409		$	34,200
ACMI Services		(3,485	)		(2,411	)
All other		2,307			654
Net unallocated interest expense		(976	)		(510	)
Net gain (loss) on financial instruments		2,355			(1,740	)
Other non-service components of retiree benefit costs, net		(1,085	)		(3,218	)
Loss from non-consolidated affiliate		(79	)		(406	)
Pre-tax earnings from continuing operations	$	12,446		$	26,569

Revenue from External Customers by Products and Services [Table Text Block]

	*Three Months Ended*
	*March 31,*
	*2024*		*2023*
Aircraft maintenance, modifications and part sales	$	40,348	$	42,073
Ground services		23,221		23,665
Other, including aviation fuel sales		18,646		18,086
Total customer revenues	$	82,215	$	83,824

Reconciliation of Assets from Segment to Consolidated [Table Text Block]

	*March 31,*		*December 31,*
	*2024*		*2023*
Assets:
CAM	$	2,929,853	$	2,885,508
ACMI Services		829,133		828,703
All other		132,751		167,879
Total	$	3,891,737	$	3,882,090

Note B - Goodwill, Intangibles and Equity Investments (Details Textual) - USD ($) $ in Millions	Mar. 31, 2024	Dec. 31, 2023	Apr. 30, 2022
Equity Method Investments	$ 32.4	$ 22.7
A321 Precision Conversions L L C [Member]
Equity Method Investment, Ownership Percentage	49.00%
G A Telesis Engine Services L L C [Member]
Equity Method Investment, Ownership Percentage			40.00%
Minimum [Member]
Finite-Lived Intangible Asset, Useful Life (Year)	2 years
Maximum [Member]
Finite-Lived Intangible Asset, Useful Life (Year)	15 years

Note B - Goodwill, Intangibles and Equity Investments - Schedule of Goodwill (Details) - USD ($) $ in Thousands	Mar. 31, 2024	Dec. 31, 2023
Goodwill	$ 395,974	$ 395,974
Cam [Member]
Goodwill	153,290	153,290
ACMI Services [Member]
Goodwill	234,571	234,571
Other Operating Segment [Member]
Goodwill	$ 8,113	$ 8,113

Note B - Goodwill, Intangibles and Equity Investments - Summary of Intangible Assets (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2024	Dec. 31, 2023
Indefinite-Lived Intangible Assets	$ 9,000	$ 9,000
Finite-Lived Intangible Assets	74,900	77,453
Intangible Assets	83,900	$ 86,453
Amortization	$ (2,553)

Note B - Goodwill, Intangibles and Equity Investments - Summary of Incentive to Lessee (Details) $ in Thousands	3 Months Ended
	Mar. 31, 2024 USD ($)
Carrying value, beginning balance	$ 60,961
Amortization	(3,912)
Carrying value, ending balance	$ 57,049

Note C - Significant Customers (Details Textual) $ / shares in Units, $ in Thousands					3 Months Ended
	May 06, 2024 $ / shares shares	Aug. 14, 2023 USD ($) shares	May 29, 2020 $ / shares shares	Dec. 22, 2018 $ / shares shares	Mar. 31, 2024 USD ($)	Mar. 31, 2023 USD ($)	Sep. 30, 2022	Dec. 31, 2023 USD ($)	Dec. 31, 2021	Dec. 31, 2020	Dec. 20, 2018 shares
Stock Repurchased During Period, Shares (in shares)		5,435,777
Payments for Repurchase of Common Stock \| $					$ (0)	$ 21,918
Warrants With Investment Agreement [Member]
Class of Warrant or Right, Number of Securities Called by Warrants or Rights (in shares)			7,000,000	14,800,000							14,800,000
Class of Warrant or Right, Exercise Price of Warrants or Rights (in dollars per share) \| $ / shares			$ 20.4	$ 21.53
Class of Warrant or Right, Additional Number of Securities Called by Warrants or Rights (in shares)			2,900,000
Lessee, Number of Leased Aircraft			5
Warrants and Rights Outstanding \| $					1,600			$ 1,700
Fair Value Adjustment of Warrants \| $					$ (100)	$ (800)
Warrants With Investment Agreement [Member] \| Subsequent Event [Member]
Class of Warrant or Right, Number of Securities Called by Warrants or Rights (in shares)	21,800,000
B-767-300 [Member]
Lessor, Number of Leased Aircraft			12						11	10
Lessor, Leased Aircraft, Lease Term (Year)			10 years
B-767 [Member]
Number of Additional Leased Aircraft										10
Lessor, Leased Aircraft, Number of Lease Extensions										20
DHL [Member] \| B-767-200 [Member]
Lessor, Number of Leased Aircraft					1
DHL [Member] \| B-767-300 [Member]
Lessor, Number of Leased Aircraft					13
DHL [Member] \| B-767 [Member]
Number of Aircraft Operated							4
ASI [Member] \| B-767-200 [Member]
Lessor, Number of Leased Aircraft				12
Lessor, Leased Aircraft, Lease Term (Year)				2 years
Lessor, Leased Aircraft, Option to Extend, Term (Year)				3 years
ASI [Member] \| B-767-300 [Member]
Lessor, Number of Leased Aircraft				8
Number of Aircraft Operated				10
Lessor, Leased Aircraft, Option to Extend, Term (Year)				3 years
ATSA [Member]
Warrants and Rights Outstanding, Term (Year)	5 years
ATSA [Member] \| The 2024 Subsequent Warrant [Member] \| Subsequent Event [Member]
Warrants and Rights Outstanding, Term (Year)	7 years
Class of Warrant or Right, Number of Securities Called by Warrants or Rights (in shares)	2,900,000
Class of Warrant or Right, Exercise Price of Warrants or Rights (in dollars per share) \| $ / shares	$ 12.96
ATSA [Member] \| The 2024 Subsequent Warrant [Member] \| Subsequent Event [Member] \| Share-Based Payment Arrangement, Tranche One [Member]
Class of Warrant or Right, Number of Securities Called by Warrants or Rights (in shares)	728,750
ATSA [Member] \| B-767-300 [Member] \| Subsequent Event [Member]
Lessor, Number of Leased Aircraft	10
Lessor, Leased Aircraft, Option to Extend, Term (Year)	5 years
Amazon [Member]
Stock Repurchased During Period, Shares (in shares)		1,177,000
Payments for Repurchase of Common Stock \| $		$ 22,900
Amazon [Member] \| Subsequent Event [Member]
Lessor, Leased Aircraft, Option to Extend, Term (Year)	3 years
Amazon [Member] \| Third Subsequent Warrant [Member] \| Subsequent Event [Member]
Warrants and Rights Outstanding, Term (Year)	7 years
Class of Warrant or Right, Number of Securities Called by Warrants or Rights (in shares)	2,900,000
Amazon [Member] \| Third Subsequent Warrant [Member] \| Subsequent Event [Member] \| Share-Based Payment Arrangement, Tranche One [Member]
Class of Warrant or Right, Number of Securities Called by Warrants or Rights (in shares)	291,500
Amazon [Member] \| Third Subsequent Warrant [Member] \| Subsequent Event [Member] \| Share-Based Payment Arrangement, Tranche Two [Member]
Class of Warrant or Right, Number of Securities Called by Warrants or Rights (in shares)	72,875

Note C - Significant Customers - Disaggregation of Revenue (Details) - Revenue Benchmark [Member] - Customer Concentration Risk [Member]	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Do D [Member]
Concentration Risk, Percentage	28.00%	29.00%
Amazon [Member]
Concentration Risk, Percentage	34.00%	35.00%
DHL [Member]
Concentration Risk, Percentage	13.00%	14.00%

Note C - Significant Customers - Schedules of Concentration of Risk, by Risk Factor (Details) - USD ($) $ in Thousands	Mar. 31, 2024	Dec. 31, 2023
Accounts receivable, net of allowance of $1,193 in 2024 and $1,065 in 2023	$ 219,946	$ 215,581
Accounts Receivable [Member] \| Customer Concentration Risk [Member] \| Do D [Member]
Accounts receivable, net of allowance of $1,193 in 2024 and $1,065 in 2023	64,050	56,848
Accounts Receivable [Member] \| Customer Concentration Risk [Member] \| Amazon [Member]
Accounts receivable, net of allowance of $1,193 in 2024 and $1,065 in 2023	83,209	74,509
Accounts Receivable [Member] \| Customer Concentration Risk [Member] \| DHL [Member]
Accounts receivable, net of allowance of $1,193 in 2024 and $1,065 in 2023	$ 9,777	$ 8,040

Note C - Significant Customers - Summary of Warrants (Details) shares in Thousands	Mar. 31, 2024 $ / shares shares
Warrant One [Member]
Exercise price (in dollars per share) \| $ / shares	$ 21.53
Vested (in shares)	14,800
Non-Vested (in shares)	0
Expiration	Dec. 20, 2025
Warrant Two [Member]
Exercise price (in dollars per share) \| $ / shares	$ 20.4
Vested (in shares)	7,000
Non-Vested (in shares)	0
Expiration	Dec. 20, 2025

Note D - Fair Value Measurements (Details Textual) - Fair Value, Recurring [Member] - Fair Value, Inputs, Level 2 [Member] - USD ($) $ in Millions	Mar. 31, 2024	Dec. 31, 2023
Debt Instrument, Fair Value Disclosure, Difference Between Fair Value and Carrying Value	$ 126.6	$ 97.6
Debt Instrument, Fair Value Disclosure	$ 1,717.8	$ 1,762.3

Note D - Fair Value Measurements - Schedule of Assets and Liabilities Measured on Recurring Basis (Details) - Fair Value, Recurring [Member] - USD ($) $ in Thousands	Mar. 31, 2024	Dec. 31, 2023
Total Assets	$ 3,041	$ 1,248
Total Liabilities	(1,626)	(2,258)
Interest Rate Swap [Member]
Interest rate swap	1,723	0
Derivative Liability		(529)
Sale Option [Member]
Derivative Liability	(1,258)	(1,258)
Stock Warrant Obligations [Member]
Derivative Liability	(368)	(471)
Fair Value, Inputs, Level 1 [Member]
Total Assets	0	0
Total Liabilities	0	0
Fair Value, Inputs, Level 1 [Member] \| Interest Rate Swap [Member]
Interest rate swap	0	0
Derivative Liability		0
Fair Value, Inputs, Level 1 [Member] \| Sale Option [Member]
Derivative Liability	0	0
Fair Value, Inputs, Level 1 [Member] \| Stock Warrant Obligations [Member]
Derivative Liability	0	0
Fair Value, Inputs, Level 2 [Member]
Total Assets	3,041	1,248
Total Liabilities	0	(529)
Fair Value, Inputs, Level 2 [Member] \| Interest Rate Swap [Member]
Interest rate swap	1,723	0
Derivative Liability		(529)
Fair Value, Inputs, Level 2 [Member] \| Sale Option [Member]
Derivative Liability	0	0
Fair Value, Inputs, Level 2 [Member] \| Stock Warrant Obligations [Member]
Derivative Liability	0	0
Fair Value, Inputs, Level 3 [Member]
Total Assets	0	0
Total Liabilities	(1,626)	(1,729)
Fair Value, Inputs, Level 3 [Member] \| Interest Rate Swap [Member]
Interest rate swap	0	0
Derivative Liability		0
Fair Value, Inputs, Level 3 [Member] \| Sale Option [Member]
Derivative Liability	(1,258)	(1,258)
Fair Value, Inputs, Level 3 [Member] \| Stock Warrant Obligations [Member]
Derivative Liability	(368)	(471)
Money Market Funds [Member]
Cash equivalents—money market	1,318	1,248
Money Market Funds [Member] \| Fair Value, Inputs, Level 1 [Member]
Cash equivalents—money market	0	0
Money Market Funds [Member] \| Fair Value, Inputs, Level 2 [Member]
Cash equivalents—money market	1,318	1,248
Money Market Funds [Member] \| Fair Value, Inputs, Level 3 [Member]
Cash equivalents—money market	$ 0	$ 0

Note E - Property and Equipment (Details Textual) - USD ($) $ in Millions	Mar. 31, 2024	Dec. 31, 2023
Cam [Member] \| Flight Equipment [Member]
Property, Plant, and Equipment, Lessor Asset under Operating Lease, after Accumulated Depreciation	$ 1,715.4	$ 1,640.9

Note E - Property and Equipment - Summary of Property, Plant and Equipment (Details) - USD ($) $ in Thousands	Mar. 31, 2024	Dec. 31, 2023
Property, Plant and Equipment, Gross	$ 4,723,321	$ 4,618,263
Accumulated depreciation	(1,856,986)	(1,797,494)
Property and equipment, net	2,866,335	2,820,769
Flight Equipment [Member]
Property, Plant and Equipment, Gross	4,055,379	3,865,049
Ground Equipment [Member]
Property, Plant and Equipment, Gross	72,653	72,463
Leasehold Improvements, Facilities and Office Equipment [Member]
Property, Plant and Equipment, Gross	43,659	42,120
Aircraft Modifications and Projects in Progress [Member]
Property, Plant and Equipment, Gross	$ 551,630	$ 638,631

Note F - Debt Obligations (Details Textual) $ / shares in Units, $ in Thousands		1 Months Ended	3 Months Ended
	Aug. 14, 2023 USD ($) $ / shares shares	Sep. 30, 2017 USD ($) $ / shares $ / item	Mar. 31, 2024 USD ($) shares	Jun. 30, 2021 USD ($)	Dec. 31, 2023 USD ($)	Apr. 13, 2021 USD ($)	Jan. 28, 2020 USD ($)
Stock Repurchased During Period, Shares (in shares) \| shares	5,435,777
Long-Term Debt			$ 1,717,774		$ 1,762,282
Debt Instrument, Variable Interest Rate, Type [Extensible Enumeration]			Secured Overnight Financing Rate (SOFR) [Member]
Warrants to the Convertible Note Hedge Counterparties [Member]
Class of Warrant or Right, Number of Securities Called by Warrants or Rights (in shares) \| shares			1,700,000
Convertible Debt [Member]
Debt Instrument, Face Amount			$ 444,897		454,225
Long-Term Debt			444,897		444,420
Senior Notes [Member]
Long-Term Debt			578,694		578,574
Convertible Senior Notes Due2029 [Member] \| Convertible Debt [Member]
Debt Instrument, Face Amount	$ 400,000		390,782		400,000
Debt Instrument, Interest Rate, Stated Percentage	3.875%
Debt Instrument, Convertible, Conversion Price (in dollars per share) \| $ / shares	$ 31.28
Convertible Senior Notes Due 2024 [Member] \| Convertible Debt [Member]
Debt Instrument, Face Amount	$ 204,500	$ 258,800	54,115		54,225
Debt Instrument, Interest Rate, Stated Percentage	1.125%	1.125%
Debt Instrument, Convertible, Conversion Price (in dollars per share) \| $ / shares		$ 31.9
Debt Instrument, Repurchased Face Amount	$ 204,500
Long-Term Debt	54,200
Payments for Hedge, Financing Activities		$ 56,100
Debt Instrument, Convertible, Number of Equity Instruments		8,100,000
Derivative, Price Risk Option Strike Price (in USD per Per Share) \| $ / item		31.9
Gain (Loss) on Repurchase of Debt Instrument	$ 1,300
Senior Unsecured Notes [Member] \| Senior Notes [Member]
Debt Instrument, Face Amount						$ 200,000	$ 500,000
Debt Instrument, Interest Rate, Stated Percentage							4.75%
Debt Instrument, Repurchase Amount						$ 205,500
Deferred Debt Issuance Cost, Writeoff				$ 6,500
Long-Term Debt			4,000		$ 4,300
Revolving Credit Facility [Member] \| Senior Credit Agreement [Member]
Line of Credit Facility, Maximum Borrowing Capacity			$ 1,000,000
Debt Instrument, Covenant, Collateral to Outstanding Loan Ratio			1.25
Debt Instrument, Covenant, Secured Leverage Ratio, Maximum			3
Debt Instrument, Covenant, Total Leverage Ratio, Maximum			3.5
Debt Instrument, Basis Spread on Variable Rate			6.68%
Line of Credit Facility, Remaining Borrowing Capacity			$ 403,700
Revolving Credit Facility [Member] \| Irish Facility [Member]
Line of Credit Facility, Maximum Borrowing Capacity			100,000
Letter of Credit [Member] \| Irish Facility [Member]
Line of Credit Facility, Maximum Borrowing Capacity			$ 7,500

Note F - Debt Obligations - Summary of Debt (Details) - USD ($) $ in Thousands	Mar. 31, 2024	Dec. 31, 2023
Long-Term Debt	$ 1,717,774	$ 1,762,282
Less: current portion	(54,768)	(54,710)
Total long term obligations, net	1,663,006	1,707,572
Revolving Credit Facility [Member]
Long-Term Debt	685,000	730,000
Senior Notes [Member]
Long-Term Debt	578,694	578,574
Convertible Debt [Member]
Long-Term Debt	444,897	444,420
Notes Payable, Other Payables [Member]
Long-Term Debt	$ 9,183	$ 9,288

Note F - Debt Obligations - Summary of Convertible Debt (Details) - Convertible Debt [Member] - USD ($) $ in Thousands	Mar. 31, 2024	Dec. 31, 2023	Aug. 14, 2023	Sep. 30, 2017
Principal Value December 31, 2023	$ 444,897	$ 454,225
Unamortized issuance cost	(9,328)
Convertible Senior Notes Due 2024 [Member]
Principal Value December 31, 2023	54,115	54,225	$ 204,500	$ 258,800
Unamortized issuance cost	(110)
Convertible Senior Notes Due2029 [Member]
Principal Value December 31, 2023	390,782	$ 400,000	$ 400,000
Unamortized issuance cost	$ (9,218)

Note G - Derivative Instruments (Details Textual) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Unrealized Gain (Loss) on Derivatives	$ 2.3	$ 0.9

Note G - Derivative Instruments - Schedule of Interest Rate Derivatives (Details) - USD ($) $ in Thousands	Mar. 31, 2024	Dec. 31, 2023
Interest Rate Swap 3793 [Member]
Derivative, Fixed Interest Rate	3.793%
Derivative Liability, Notional Amount	$ 50,000	$ 50,000
Interest Rate Derivative Assets, at Fair Value	$ 665	237
Interest Rate Swap 3836 [Member]
Derivative, Fixed Interest Rate	3.836%
Derivative Liability, Notional Amount	$ 50,000	50,000
Interest Rate Derivative Assets, at Fair Value	$ 700	189
Interest Rate Swap 4257 [Member]
Derivative, Fixed Interest Rate	4.257%
Derivative Liability, Notional Amount	$ 50,000	50,000
Interest Rate Derivative Assets, at Fair Value	$ 116
Interest Rate Derivative Liabilities, at Fair Value		(525)
Interest Rate Swap 4185 [Member]
Derivative, Fixed Interest Rate	4.185%
Derivative Liability, Notional Amount	$ 50,000	50,000
Interest Rate Derivative Assets, at Fair Value	$ 242
Interest Rate Derivative Liabilities, at Fair Value		$ (430)

Note H - Commitments and Contingencies (Details Textual) $ in Millions	3 Months Ended		12 Months Ended
	Mar. 31, 2024 USD ($)	Mar. 31, 2023 USD ($)	Dec. 31, 2023 USD ($)
Right-of-Use Asset Obtained in Exchange for Operating Lease Liability	$ 0.5	$ 0.4
Operating Lease, Weighted Average Discount Rate, Percent	4.10%		4.00%
Operating Lease, Weighted Average Remaining Lease Term (Year)	3 years 9 months 18 days		3 years 10 months 24 days
Operating Lease, Payments	$ 5.9		$ 6.6
Contractual Obligation	478.1
Contractual Obligation, to be Paid, Remainder of Fiscal Year	$ 116.7
Number of Slots for Aircraft Modifications	20
B-767-300 [Member]
Number of Owned Aircrafts	13
Number Of Aircraft to Be Purchased	3
A321-200 [Member]
Number of Owned Aircrafts	6
A-330 [Member]
Number of Owned Aircrafts	5
A330-300 [Member]
Number Of Aircraft to Be Purchased	5
Minimum [Member] \| Property Leases [Member]
Lessee, Operating Lease, Term of Contract (Month)	1 month
Minimum [Member] \| Equipment Leases [Member]
Lessee, Operating Lease, Term of Contract (Month)	1 year
Maximum [Member] \| Property Leases [Member]
Lessee, Operating Lease, Term of Contract (Month)	9 years
Maximum [Member] \| Equipment Leases [Member]
Lessee, Operating Lease, Term of Contract (Month)	5 years
Aircraft Provided by Customers [Member]
Lessee, Number of Leased Aircraft	16
Aircraft Leased From External Customers [Member]
Lessee, Number of Leased Aircraft	5

Note H - Commitments and Contingencies - Maturities of Operating Lease Liabilities (Details) - USD ($) $ in Thousands	Mar. 31, 2024	Dec. 31, 2023
2024	$ 16,115
2025	15,659
2026	8,962
2027	4,673
2028	3,526
2029 and beyond	5,730
Total undiscounted cash payments	54,665
Less: amount representing interest	(4,468)
Present value of future minimum lease payments	50,197
Less: current obligations under leases	18,947	$ 20,167
Long-term lease obligation	$ 31,250	$ 34,990

Note H - Commitments and Contingencies - Employee Concentration Table (Details)	Mar. 31, 2024
A B X Airline [Member] \| International Brotherhood of Teamsters [Member]
Percentage	5.10%
A T I Airline [Member] \| Air Line Pilots Association [Member]
Percentage	11.70%
A T I Airline [Member] \| Association of Flight Attendants [Member]
Percentage	0.80%
O A I Airline [Member] \| International Brotherhood of Teamsters [Member]
Percentage	6.40%
O A I Airline [Member] \| Association of Flight Attendants [Member]
Percentage	6.60%

Note I - Pension and Other Post-retirement Benefit Plans (Details Textual) - Pension Plan [Member] $ in Millions	3 Months Ended
	Mar. 31, 2024 USD ($)
Defined Benefit Plan, Plan Assets, Contributions by Employer	$ 0.9
Defined Benefit Plan, Expected Future Employer Contributions, Remainder of Fiscal Year	$ 0.5

Note I - Pension and Other Post-retirement Benefit Plans - Schedule of Net Benefit Costs (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Pension Plan [Member]
Service cost	$ 0	$ 0
Interest cost	6,614	8,631
Expected return on plan assets	(8,122)	(10,192)
Amortization of net loss	2,594	4,745
Net periodic benefit cost (income)	1,086	3,184
Postretirement Health Coverage [Member]
Service cost	5	13
Interest cost	23	33
Expected return on plan assets	0	0
Amortization of net loss	(23)	0
Net periodic benefit cost (income)	$ 5	$ 46

Note J - Income Taxes (Details Textual)	3 Months Ended
Note J - Income Taxes (Details Textual)	Mar. 31, 2024
Effective Income Tax Rate Reconciliation, Percent	31.00%
Scenario, Plan [Member]
Effective Income Tax Rate Reconciliation, Percent	29.00%

Note K - Accumulated Other Comprehensive Income (Loss) - Schedule of Accumulated Other Comprehensive Income (Loss) (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Balance as of January 1, 2023	$ 1,368,702	$ 1,412,506
Balance as of March 31, 2023	1,381,425	1,414,067
Accumulated Defined Benefit Plans Adjustment Attributable to Parent [Member]
Balance as of January 1, 2023	(57,931)	(103,418)
Actuarial costs (reclassified to salaries, wages and benefits)	2,594	4,745
Income Tax (Expense) or Benefit	(610)	(1,040)
Other comprehensive income (loss), net of tax	1,984	3,705
Balance as of March 31, 2023	(55,947)	(99,713)
Accumulated Defined Benefit Post Retirement Plans Adjustment Attributable to Parent [Member]
Balance as of January 1, 2023	502	36
Actuarial costs (reclassified to salaries, wages and benefits)	(23)	0
Income Tax (Expense) or Benefit	6	0
Other comprehensive income (loss), net of tax	(17)	0
Balance as of March 31, 2023	485	36
Accumulated Foreign Currency Adjustment Attributable to Parent [Member]
Balance as of January 1, 2023	0	(20)
Actuarial costs (reclassified to salaries, wages and benefits)	0	0
Income Tax (Expense) or Benefit	0	0
Other comprehensive income (loss), net of tax	0	0
Balance as of March 31, 2023	0	(20)
AOCI Attributable to Parent [Member]
Balance as of January 1, 2023	(57,429)	(103,402)
Actuarial costs (reclassified to salaries, wages and benefits)	2,571	4,745
Income Tax (Expense) or Benefit	(604)	(1,040)
Other comprehensive income (loss), net of tax	1,967	3,705
Balance as of March 31, 2023	$ (55,462)	$ (99,697)

Note L- Stock-based Compensation (Details Textual) - USD ($) $ / shares in Units, $ in Millions	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Grants in Period, Weighted Average Grant Date Fair Value (in dollars per share)	$ 12.37	$ 0
Share-Based Payment Arrangement, Expense	$ 2.6	$ 1.4
Share-Based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Amount	$ 18.7
Share-Based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Period for Recognition (Year)	1 year 9 months 18 days
Share-Based Compensation Arrangement by Share-Based Payment Award, Number of Shares Available for Grant (in shares)	2,449,584
Restricted Stock [Member]
Share-Based Compensation Arrangement by Share-Based Payment Award, Award Requisite Service Period (Year)	3 years
Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Vested in Period (in shares)	0
Stock Units [Member]
Share-Based Compensation Arrangement by Share-Based Payment Award, Award Requisite Service Period (Year)	3 years
Time Based Awards [Member] \| Director [Member]
Share-Based Compensation Arrangement by Share-Based Payment Award, Award Requisite Service Period (Year)	12 months
Restricted Stock and Time-based Award [Member]
Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Grants in Period, Weighted Average Grant Date Fair Value (in dollars per share)	$ 12.19
Market Condition Award [Member]
Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Grants in Period, Weighted Average Grant Date Fair Value (in dollars per share)	$ 12.95
Market Condition Award [Member] \| Director [Member]
Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Vested in Period (in shares)	496,838

Note L- Stock-based Compensation - Summary of Share-based Compensation Activity (Details) - $ / shares	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Outstanding at beginning of period (in shares)	1,066,784	929,205
Outstanding at beginning of period (in dollars per share)	$ 20.19	$ 21.83
Granted (in shares)	926,984	0
Granted (in dollars per share)	$ 12.37	$ 0
Converted (in shares)	(71,359)	(186,828)
Converted (in dollars per share)	$ 25.71	$ 20.87
Expired (in shares)	0	0
Expired (in dollars per share)	$ 0	$ 0
Forfeited (in shares)	(9,600)	(600)
Forfeited (in dollars per share)	$ 26.9	$ 36.93
Outstanding at end of period (in shares)	1,912,809	741,777
Outstanding at end of period (in dollars per share)	$ 16.16	$ 22.04
Vested (in shares)	496,838	298,928
Vested (in dollars per share)	$ 10.8	$ 8.02

Note L- Stock-based Compensation - Schedule of Valuation Assumptions (Details) - Market Condition Award [Member]	3 Months Ended
	Mar. 31, 2024
Risk-free interest rate	4.40%
Volatility	43.00%

Note M - Common Stock and Earnings Per Share (Details Textual) - shares	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Incremental Common Shares Attributable to Dilutive Effect of Share-Based Payment Arrangements (in shares)	562,000	3,144,000
Restricted Stock [Member]
Incremental Common Shares Attributable to Dilutive Effect of Share-Based Payment Arrangements (in shares)	700,271	226,149

Note M - Common Stock and Earnings Per Share - Schedule of Earnings Per Share (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Earnings from continuing operations - basic	$ 8,619	$ 20,141
Gain from stock warrants revaluation, net of tax	0	(108)
Convertible debt interest charge, net of tax	159	776
Earnings from continuing operations - diluted	$ 8,778	$ 20,809
Basic (in shares)	64,973	71,802
Effect of stock-based compensation awards and warrants (in shares)	562	3,144
Effect of convertible debt (in shares)	1,700	8,111
Weighted-average shares outstanding assuming dilution (in shares)	67,235	83,057
Continuing operations (in dollars per share)	$ 0.13	$ 0.28
Diluted earnings per share from continuing operations (in dollars per share)	$ 0.13	$ 0.25

Note N - Segment and Revenue Information (Details Textual) $ in Thousands	3 Months Ended
	Mar. 31, 2024 USD ($)	Mar. 31, 2023 USD ($)	Dec. 31, 2023 USD ($)
Number of Reportable Segments	2
Contract with Customer, Liability, Revenue Recognized	$ 3,900	$ 6,500
Contract with Customer, Liability	9,100		$ 4,500
Contract with Customer, Asset, after Allowance for Credit Loss, Noncurrent	8,200		$ 8,700
Revenues	485,517	501,095
Incentive to Lessee, Amortization	$ 3,912
Cam [Member]
Percentage of Leases With Purchase Options	16.00%
Lessor, Operating Lease, Payment to be Received, Remainder of Fiscal Year	$ 217,400
Lessor, Operating Lease, Payment to be Received, Year One	267,000
Lessor, Operating Lease, Payment to be Received, Year Two	235,100
Lessor, Operating Lease, Payment to be Received, Year Three	206,800
Lessor, Operating Lease, Payment to be Received, Year Four	171,900
Lessor, Operating Lease, Payment to be Received, after Year Four	254,300
Incentive to Lessee, Amortization	3,100	5,000
Cam [Member] \| Non Lease Activities [Member]
Revenues	4,800	6,700
ACMI Services [Member]
Incentive to Lessee, Amortization	800	800
Segment, Expenditure, Addition to Long-Lived Assets	$ 20,700	$ 82,100

Note N - Segment and Revenue Information - Schedule of Segment Reporting Information, by Segment (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Revenues	$ 485,517	$ 501,095
REVENUES	485,517	501,095
Depreciation and amortization	90,380	84,728
Net gain (loss) on financial instruments	2,355	(1,740)
Non-service component of retiree benefit costs	(1,085)	(3,218)
Loss from non-consolidated affiliate	(79)	(406)
Pre-tax earnings from continuing operations	12,446	26,569
Intersegment Eliminations [Member]
Revenues	(52,896)	(55,664)
Segment Reporting, Reconciling Item, Excluding Corporate Nonsegment [Member]
Interest expense	(976)	(510)
Cam [Member] \| Operating Segments [Member]
Revenues	105,549	112,044
REVENUES	79,591	83,158
Depreciation and amortization	65,373	60,397
Interest expense	15,280	10,022
Segment earnings (loss)	13,409	34,200
ACMI Services [Member] \| Operating Segments [Member]
Revenues	323,824	334,127
REVENUES	323,711	334,113
Depreciation and amortization	24,249	23,621
Interest expense	5,493	4,958
Segment earnings (loss)	(3,485)	(2,411)
Other Operating Segment [Member] \| Operating Segments [Member]
Revenues	109,040	110,588
REVENUES	82,215	83,824
Depreciation and amortization	758	710
Segment earnings (loss)	$ 2,307	$ 654

Note N - Segment and Revenue Information - Summary of Revenue by Products and Services (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
REVENUES	$ 485,517	$ 501,095
Operating Segments [Member] \| Other Operating Segment [Member]
REVENUES	82,215	83,824
Operating Segments [Member] \| Other Operating Segment [Member] \| Aircraft Maintenance Modifications and Part Sales [Member]
REVENUES	40,348	42,073
Operating Segments [Member] \| Other Operating Segment [Member] \| Ground Services [Member]
REVENUES	23,221	23,665
Operating Segments [Member] \| Other Operating Segment [Member] \| Other Including Aviation Fuel Sales [Member]
REVENUES	$ 18,646	$ 18,086

Note N - Segment and Revenue Information - Reconciliation of Assets (Details) - USD ($) $ in Thousands	Mar. 31, 2024	Dec. 31, 2023
Assets	$ 3,891,737	$ 3,882,090
Cam [Member]
Assets	2,929,853	2,885,508
ACMI Services [Member]
Assets	829,133	828,703
Other Operating Segment [Member]
Assets	$ 132,751	$ 167,879

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