Variable Interest Entities (Information Related To The Assets And Liabilities Of The VIEs) (Details) - USD ($) $ in Thousands	Mar. 31, 2021	Dec. 31, 2020
Variable Interest Entity [Line Items]
Restricted cash	$ 40,478	$ 35,728
Securitized notes receivable, net	401,564	409,349
Receivable backed notes payable - non-recourse	364,933	355,833
Variable Interest Entity, Primary Beneficiary [Member]
Variable Interest Entity [Line Items]
Restricted cash	18,297	20,469
Securitized notes receivable, net	269,082	292,021
Receivable backed notes payable - non-recourse	$ 325,317	$ 341,532