Finance Assets and Lessor Operating Leases (Lease Income) (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Leases [Abstract]
Profit recognized at commencement	$ 21,271	$ 36,508	$ 51,166	$ 73,112
Interest income	34,055	58,045	68,315	117,523
Total lease income from sales-type leases	$ 55,326	$ 94,553	$ 119,481	$ 190,635