Finance Assets and Lessor Operating Leases (Lease Income) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Leases [Abstract]
Profit recognized at commencement	$ 29,169	$ 39,326	$ 80,349	$ 112,422
Interest income	33,654	56,522	101,969	174,045
Total lease income from sales-type leases	$ 62,823	$ 95,848	$ 182,318	$ 286,467