Finance Assets and Lessor Operating Leases (Lease Income) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Leases [Abstract]
Profit recognized at commencement	$ 38,086	$ 38,204	$ 108,743	$ 125,133
Interest income	56,522	60,653	174,045	183,340
Total lease income from sales-type leases	$ 94,608	$ 98,857	$ 282,788	$ 308,473