Finance Assets and Lessor Operating Leases (Lease Income) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Receivables [Abstract]
Profit recognized at commencement	$ 142,353	$ 171,938	$ 157,375
Interest income	229,719	245,751	253,224
Total lease income from sales-type leases	$ 372,072	$ 417,689	$ 410,599