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COVID-19 COVID-19 Segment (Details) $ in Thousands | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2021 USD ($) | Jun. 30, 2020 USD ($) | Jun. 30, 2021 USD ($) aircraft engine Aircraft | Jun. 30, 2020 USD ($) engine aircraft
Segment Reporting Information [Line Items] |  |  |  |
Operating Special Charge, Total | $ 854 | $ 81,169 | $ 2,592 | $ 247,267
Non-Operating Special Charge, Total | 0 | 19,830 | 0 | 26,632
Special Charges | $ 854 | 100,999 | 2,592 | 273,899
Asset Impairment Charges |  |  |  | 168,400
Other Aircraft Related Costs |  |  | $ 2,100 | $ 58,600
Number of Engines Retired | engine |  |  | 6 | 5
Other Expenses |  |  | $ 500 | $ 2,400
Number Of Aircraft In Sale-Leaseback Transactions | aircraft |  |  | 3 | 4
Postemployment Benefits, Period Expense |  |  |  | $ 19,700
Termination Loans |  | $ 19,800 |  | $ 19,800
Airbus A320 Aircraft Series |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Number of Aircraft Retired |  |  | 4 | 7
Sunseeker Resorts |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Construction Suspension Expense |  |  |  | $ 5,000

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