Fair Value Of Financial Instruments (Details) - USD ($) $ in Thousands	Sep. 30, 2020	Dec. 31, 2019
Carrying Amount [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cash and cash equivalents	$ 193,103	$ 190,009
Restricted cash	35,312	49,637
Notes receivable, net	410,113	448,568
Lines-of-credit, notes payable, and receivable-backed notes payable	541,389	568,975
Junior subordinated debentures	72,710	72,081
Fair Value [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cash and cash equivalents	193,103	190,009
Restricted cash	35,312	49,637
Notes receivable, net	542,309	587,000
Lines-of-credit, notes payable, and receivable-backed notes payable	543,500	589,300
Junior subordinated debentures	$ 74,500	$ 98,500