Variable Interest Entities (Information Related To The Assets And Liabilities Of The VIEs) (Details) - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017
Variable Interest Entity [Line Items]
Restricted cash	$ 53,726	$ 46,012
Securitized notes receivable, net	439,167	426,858
Receivable backed notes payable - non-recourse	382,257	336,421
Variable Interest Entity, Primary Beneficiary [Member]
Variable Interest Entity [Line Items]
Restricted cash	28,400	19,488
Securitized notes receivable, net	341,975	279,188
Receivable backed notes payable - non-recourse	$ 382,257	$ 336,421