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COVID-19 COVID-19 Segment (Details) $ in Thousands	3 Months Ended
	Mar. 31, 2021 USD ($) Aircraft engine	Mar. 31, 2020 USD ($)
Segment Reporting Information [Line Items]
Operating Special Charge, Total	$ 1,738	$ 166,098
Non-Operating Special Charge, Total	0	6,802
Special Charges	1,738	172,900
Asset Impairment Charges		163,400
Other Aircraft Related Costs	$ 1,200
Number of Engines Retired | engine	3
Other Expenses	$ 500
COVID 19
Segment Reporting Information [Line Items]
Operating Special Charge, Total		$ 9,500
Airbus A320 Aircraft Series
Segment Reporting Information [Line Items]
Number of Aircraft Retired | Aircraft	2

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