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Assets Held For Sale and Other Income - Additional Information (Details)
$ in Thousands
3 Months Ended 6 Months Ended
Jun. 30, 2020
USD ($)
Engine
Jun. 30, 2019
USD ($)
Jun. 30, 2020
USD ($)
Engine
Jun. 30, 2019
USD ($)
Dec. 31, 2019
USD ($)
Engine
Impairment Of Aircraft Engines Held For Sale [Line Items]          
Net gain from sale of aircraft $ (2) $ 0 $ 6,715 $ 0  
Net proceeds from sale of aircraft     44,110 0  
Impairment loss on assets held for sale 15,934 $ 3,269 15,934 $ 3,269  
Prepaid Expenses and Other Current Assets [Member]          
Impairment Of Aircraft Engines Held For Sale [Line Items]          
Carrying value of asset held for sale $ 99,000   $ 99,000   $ 155,900
Certain Spare CF6-80 Engines [Member]          
Impairment Of Aircraft Engines Held For Sale [Line Items]          
Number of aircraft held for sale | Engine 2   2    
Aircraft Engines [Member] | Other (Income) Expense , Net [Member]          
Impairment Of Aircraft Engines Held For Sale [Line Items]          
Aircraft rent refunds $ 31,500   $ 32,900    
Dry Leasing Portfolio [Member]          
Impairment Of Aircraft Engines Held For Sale [Line Items]          
Number of aircraft held for sale | Engine 2   2   3