Number of bank term financings backed by European Export Credit Agency guarantee.

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Number of aircraft owned by consolidated variable interest entities.

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Number of Aircraft Impaired

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Variable interest entity consolidated debt outstanding, net of debt issuance costs.

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Variable interest entity consolidated flight equipment held for lease net.

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Number of variable interest entities consolidated.

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Period of time between issuance and maturity of debt instrument, in PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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No definition available.

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Difference between the fair value of payments made and the carrying amount of debt which is extinguished prior to maturity.

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The cash outflow during the period from the repayment of aggregate short-term and long-term debt. Excludes payment of capital lease obligations.

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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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No definition available.

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Variable Interest Entities (Details) $ in Thousands		3 Months Ended
Variable Interest Entities (Details) $ in Thousands	Feb. 29, 2020 USD ($) Aircraft	Mar. 31, 2020 USD ($) Aircraft Term_Loan Entity	Mar. 31, 2019 USD ($)
Variable Interest Entity [Line Items]
Gain (Loss) on Extinguishment of Debt		$ 3,955	$ 0
Variable Interest Entity, Primary Beneficiary [Member]
Variable Interest Entity [Line Items]
Number of Consolidated Variable Interest Entities \| Entity		4
Number of Aircrafts \| Aircraft		6
Variable Interest Entity, Primary Beneficiary [Member] \| Air Knight VIEs \| ECA Term Financings
Variable Interest Entity [Line Items]
Type of term loans \| Term_Loan		6
Debt instrument, term		12 years
Net book value of flight equipment held for lease		$ 309,763
Consolidated debt outstanding		$ 48,283
South African Airways [Member]
Variable Interest Entity [Line Items]
Number of Aircraft Impaired \| Aircraft	4
South African Airways [Member] \| Variable Interest Entity, Primary Beneficiary [Member] \| Air Knight VIEs \| ECA Term Financings
Variable Interest Entity [Line Items]
Repayments of Debt	$ 95,128
Number of Aircraft Impaired \| Aircraft	4