Unconsolidated Equity Method Investment (Details) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2020 USD ($) Aircraft	Jun. 30, 2019 USD ($)	Jun. 30, 2020 USD ($) Aircraft engines	Jun. 30, 2019 USD ($)	Dec. 31, 2019 USD ($)
Unconsolidated equity method investments	$ 34,450		$ 34,450		$ 32,974
Earnings of unconsolidated equity method investments, net of tax	762	$ 2,487	1,476	$ 2,131
Property Subject to or Available for Operating Lease, Net	$ 6,866,811		$ 6,866,811		$ 7,375,018
Equity Method Investee
Total number of aircraft owned by joint ventures | Aircraft	9		9
Property Subject to or Available for Operating Lease, Net	$ 321,067		$ 321,067
Magellan [Member]
Engines Sold | engines			2
Related Party Transaction, Amounts of Transaction	$ 5,355