Fair Value Of Financial Instruments (Details) - USD ($) $ in Thousands	Mar. 31, 2021	Dec. 31, 2020
Carrying Amount [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cash and cash equivalents	$ 172,552	$ 203,668
Restricted cash	40,478	35,728
Notes receivable, net	401,564	409,349
Lines-of-credit, notes payable, and receivable-backed notes payable	512,358	532,719
Junior subordinated debentures	69,128	72,932
Fair Value [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cash and cash equivalents	172,552	203,668
Restricted cash	40,478	35,728
Notes receivable, net	545,870	549,819
Lines-of-credit, notes payable, and receivable-backed notes payable	518,300	547,400
Junior subordinated debentures	$ 79,500	$ 91,000