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COVID-19 COVID-19 Segment (Details) $ in Thousands | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2021 USD ($) | Sep. 30, 2020 USD ($) | Sep. 30, 2021 USD ($) engine aircraft Aircraft | Sep. 30, 2020 USD ($) aircraft engine
Segment Reporting Information [Line Items] |  |  |  |
Operating Special Charge, Total | $ 332 | $ 33,585 | $ 2,924 | $ 280,852
Non-Operating Special Charge, Total | 0 | 0 | 0 | 26,632
Special Charges | $ 332 | 33,585 | 2,924 | 307,484
Asset Impairment Charges |  |  |  | 168,400
Other Aircraft Related Costs |  |  | $ 2,400 | $ 89,300
Number of Engines Retired | engine |  |  | 8 | 5
Other Expenses |  |  | $ 500 | $ 3,500
Number Of Aircraft In Sale-Leaseback Transactions | aircraft |  |  | 3 | 7
Postemployment Benefits, Period Expense |  |  |  | $ 21,500
Termination Loans |  | $ 19,800 |  | $ 19,800
Airbus A320 Aircraft Series |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Number of Aircraft Retired |  |  | 5 | 7
Sunseeker Resorts |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Construction Suspension Expense |  |  |  | $ 5,000

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