Fair Value of Financial Instruments (Tables)

9 Months Ended

Sep. 30, 2018

Fair Value of Financial Instruments [Abstract]

Carrying Amounts of Financial Instruments

	As of September 30, 2018				As of December 31, 2017
	Carrying Amount		Estimated Fair Value		Carrying Amount		Estimated Fair Value
Cash and cash equivalents	$	195,439	$	195,439	$	197,337	$	197,337
Restricted cash		54,892		54,892		46,012		46,012
Notes receivable, net		439,484		542,000		426,858		525,000
Lines-of-credit, notes payable, and receivable-
backed notes payable		571,284		572,964		521,312		529,400
Junior subordinated debentures		71,147		93,000		70,384		88,500