Segment and Revenue Information - Narrative (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2023 USD ($) segment aircraft	Dec. 31, 2022 USD ($) aircraft	Dec. 31, 2021 USD ($)
Segment Reporting Information [Line Items]
Number of reportable segments | segment	2
Deferred revenue recognized	$ 15,700	$ 4,700
Deferred revenue	$ 4,500	17,000
Deposit contract, assets		8,700	$ 0
Percentage of leases with purchase options	13.00%
Lessor, operating lease, payment to be received, year one	$ 271,200
Lessor, operating lease, payment to be received, year two	248,900
Lessor, operating lease, payment to be received, year three	226,600
Lessor, operating lease, payment to be received, year four	199,200
Lessor, operating lease, payment to be received, year five	164,100
Lessor, operating lease, payment to be received, after year five	237,500
Revenues	$ 2,070,611	$ 2,045,469	1,734,282
Number of aircraft | aircraft	27	25
Expenditures for property and equipment	$ 793,447	$ 599,431	504,748
Aircraft Leases
Segment Reporting Information [Line Items]
Revenues	725,600	839,000	701,900
ACMI Services
Segment Reporting Information [Line Items]
Revenues	1,399,764	1,404,348	1,185,128
Expenditures for property and equipment	86,200
ACMI Services | Non-Lease Activities
Segment Reporting Information [Line Items]
Revenues	5,600	10,100	13,200
CAM
Segment Reporting Information [Line Items]
Revenues	461,038	434,686	370,287
Expenditures for property and equipment	702,400
CAM | Non-Lease Activities
Segment Reporting Information [Line Items]
Revenues		34,300	35,100
Customer revenues
Segment Reporting Information [Line Items]
Revenues	2,070,611	2,045,469	1,734,282
Customer revenues | ACMI Services
Segment Reporting Information [Line Items]
Revenues	1,399,622	1,404,254	1,185,113
Customer revenues | CAM
Segment Reporting Information [Line Items]
Revenues	$ 353,998	$ 317,167	$ 273,288