Other Assets (Details) - USD ($) $ in Thousands	Jun. 30, 2020	Dec. 31, 2019
Principal components of other assets
Deferred income tax asset	$ 3,159	$ 1,007
Lease incentives and lease premiums, net of amortization of $67,500 and $71,851, respectively	95,976	112,923
Disposal Group, Including Discontinued Operation, Property, Plant and Equipment	326	333
Deposit Assets	43,286	33,754
Operating Lease, Right-of-Use Asset	8,783	9,329
Deferred Rent Receivables, Net	41,847	5,255
Other assets	63,670	38,608
Total other assets	257,047	201,209
Amortization of lease incentives and lease premiums	$ 67,500	$ 71,851