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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

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