Fair Value Of Financial Instruments (Details) - USD ($) $ in Thousands	Jun. 30, 2020	Dec. 31, 2019
Carrying Amount [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cash and cash equivalents	$ 209,427	$ 190,009
Restricted cash	24,829	49,637
Notes receivable, net	404,232	448,568
Lines-of-credit, notes payable, and receivable-backed notes payable	581,713	568,975
Junior subordinated debentures	72,494	72,081
Fair Value [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cash and cash equivalents	209,427	190,009
Restricted cash	24,829	49,637
Notes receivable, net	520,331	587,000
Lines-of-credit, notes payable, and receivable-backed notes payable	569,600	589,300
Junior subordinated debentures	$ 58,500	$ 98,500