Variable Interest Entities (Information Related To The Assets And Liabilities Of The VIEs) (Details) - USD ($) $ in Thousands	Sep. 30, 2019	Dec. 31, 2018
Variable Interest Entity [Line Items]
Restricted cash	$ 47,969	$ 53,726
Securitized notes receivable, net	445,706	439,167
Receivable backed notes payable - non-recourse	341,856	382,257
Variable Interest Entity, Primary Beneficiary [Member]
Variable Interest Entity [Line Items]
Restricted cash	19,185	28,400
Securitized notes receivable, net	299,374	341,975
Receivable backed notes payable - non-recourse	$ 341,856	$ 382,257