Impact of the COVID-19 Pandemic (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2021 USD ($) item	Dec. 31, 2020 USD ($) item
Unusual or Infrequent Item, or Both [Line Items]
Liquid assets	$ 904,000
Cash and marketable securities	860,400
Line of credit facility, reduction of amount available	43,600
Unpledged aircraft engines and aircraft parts	1,500,000
Current portion of long-term debt, net of debt issue costs	391,798	$ 402,158
Proceeds received	$ 260,640
PSP agreement
Unusual or Infrequent Item, or Both [Line Items]
Number of payroll support program agreements | item	3	3
Unsecured term loan | PSP agreement
Unusual or Infrequent Item, or Both [Line Items]
Debt term	10 years
Secured loan
Unusual or Infrequent Item, or Both [Line Items]
Proceeds received	$ 60,000
Treasury Loan Agreement
Unusual or Infrequent Item, or Both [Line Items]
Proceeds received		$ 60,000