Fair Value Of Financial Instruments (Details) - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019
Carrying Amount [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cash and cash equivalents	$ 203,668	$ 190,009
Restricted cash	35,728	49,637
Notes receivable, net	409,349	448,568
Lines-of-credit, notes payable, and receivable-backed notes payable	532,719	568,975
Junior subordinated debentures	72,932	72,081
Fair Value [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cash and cash equivalents	203,668	190,009
Restricted cash	35,728	49,637
Notes receivable, net	549,819	587,000
Lines-of-credit, notes payable, and receivable-backed notes payable	547,400	589,300
Junior subordinated debentures	$ 91,000	$ 98,500