Segment and Revenue Information - Other Segment Information From Continuing Operations (Details) - USD ($) $ in Thousands	3 Months Ended	12 Months Ended
	Jun. 30, 2020	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Segment Reporting Information [Line Items]
Depreciation and amortization		$ 331,064	$ 308,448	$ 278,067
Interest expense		(46,861)	(58,790)	(62,893)
Impairment of aircraft and related assets	$ (39,100)	0	0	(39,075)
Net gain (loss) on financial instruments		9,022	29,979	(100,771)
Debt issuance costs		0	(6,505)	0
Non-service component of retiree benefit gains		20,046	17,827	12,032
Loss from non-consolidated affiliates		(7,607)	(2,577)	(13,587)
Pre-tax earnings from continuing operations		260,498	301,205	41,393
Significant Reconciling Items
Segment Reporting Information [Line Items]
Interest expense		(1,748)	(2,525)	(2,825)
CAM
Segment Reporting Information [Line Items]
Depreciation and amortization		231,663	203,675	172,003
Interest expense		(30,880)	(38,160)	(39,304)
Revenue		143,008	106,161	77,424
ACMI Services
Segment Reporting Information [Line Items]
Depreciation and amortization		96,996	101,541	101,748
Interest expense		(13,818)	(18,066)	(20,542)
Revenue		95,198	158,733	114,128
All Other
Segment Reporting Information [Line Items]
Depreciation and amortization		2,405	3,232	4,316
Revenue		$ 2,579	$ 112	$ (5,933)