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Lease Rental Revenues and Flight Equipment Held for Lease (Details 3) $ in Thousands	2 Months Ended		12 Months Ended
	Feb. 29, 2020 USD ($) aircraft	Feb. 28, 2019 USD ($)	Dec. 31, 2019 aircraft
Revenues from External Customers and Long-Lived Assets [Line Items]
Gain (Loss) on Disposition of Property Plant Equipment \| $	$ 15,354	$ 4,173
Revenue \| $	$ 131,119	121,919
Number of Aircraft	272		278
Number of Offlease Aircraft Marketed for Lease or Sale			3
Number of Offlease Aircraft Marketed for Lease	2
INDONESIA
Revenues from External Customers and Long-Lived Assets [Line Items]
Gain (Loss) on Disposition of Property Plant Equipment \| $	$ 14,987
SOUTH AFRICA
Revenues from External Customers and Long-Lived Assets [Line Items]
Security Deposits taken into income \| $	$ 9,062
Asia and Pacific
Revenues from External Customers and Long-Lived Assets [Line Items]
Number of Aircraft	90		94
Europe
Revenues from External Customers and Long-Lived Assets [Line Items]
Number of Aircraft	99		99
Middle East and Africa
Revenues from External Customers and Long-Lived Assets [Line Items]
Number of Aircraft	40		40
North America
Revenues from External Customers and Long-Lived Assets [Line Items]
Number of Aircraft	26		26
Middle East and Africa
Revenues from External Customers and Long-Lived Assets [Line Items]
Number of Aircraft	15		16
Geographic Concentration Risk \| Total Revenue \| INDONESIA
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenue \| $	$ 25,373	$ 0
Percentage of geographic concentration	13.00%	0.00%
Geographic Concentration Risk \| Total Revenue \| SOUTH AFRICA
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenue \| $	$ 50,781	$ 0
Percentage of geographic concentration	26.00%	0.00%
Geographic Concentration Risk \| Net Book Value
Revenues from External Customers and Long-Lived Assets [Line Items]
Percentage of geographic concentration	100.00%		100.00%
Geographic Concentration Risk \| Net Book Value \| Asia and Pacific
Revenues from External Customers and Long-Lived Assets [Line Items]
Percentage of geographic concentration	38.00%		38.00%
Geographic Concentration Risk \| Net Book Value \| Europe
Revenues from External Customers and Long-Lived Assets [Line Items]
Percentage of geographic concentration	27.00%		26.00%
Geographic Concentration Risk \| Net Book Value \| Middle East and Africa
Revenues from External Customers and Long-Lived Assets [Line Items]
Percentage of geographic concentration	13.00%		13.00%
Geographic Concentration Risk \| Net Book Value \| North America
Revenues from External Customers and Long-Lived Assets [Line Items]
Percentage of geographic concentration	15.00%		15.00%
Geographic Concentration Risk \| Net Book Value \| Middle East and Africa
Revenues from External Customers and Long-Lived Assets [Line Items]
Percentage of geographic concentration	6.00%		7.00%
Geographic Concentration Risk \| Net Book Value \| Off Lease
Revenues from External Customers and Long-Lived Assets [Line Items]
Percentage of geographic concentration	1.00%		1.00%
Maintenance revenue
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax \| $	$ 41,214	$ 1,877
Maintenance revenue \| SOUTH AFRICA
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax \| $	$ 38,305
A-320-200 [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Offlease Aircraft with Future Lease Commitments			1
A-330-200 [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Offlease Aircraft with Future Lease Commitments	1
Number of Offlease Aircraft Marketed for Lease			1
B-737-800 [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Number of Offlease Aircraft Marketed for Lease or Sale	1
Number of Offlease Aircraft Marketed for Lease			1