Fair Value Measurements (Details Textual) $ in Thousands		2 Months Ended		7 Months Ended
	Feb. 29, 2020 USD ($) aircraft	Feb. 29, 2020 USD ($)	Feb. 28, 2019 USD ($)	Sep. 30, 2020 aircraft	Oct. 30, 2020 USD ($)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Liability, Transfers, Net		$ 0
South African Airways [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Number of Aircraft Impaired | aircraft	4
Maintenance revenue
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax		$ 41,214	$ 1,877
Maintenance revenue | South African Airways [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	$ 38,305
security deposit [Member] | South African Airways [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	9,062
Transactional [Member] | South African Airways [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Tangible Asset Impairment Charges	$ 62,657
Subsequent Event
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Deferred Lease Income, Current					$ 101,000
Number of Aircraft Impaired | aircraft				18