Fair Value of Financial Instruments (Tables)

3 Months Ended

Mar. 31, 2018

Fair Value of Financial Instruments [Abstract]

Carrying Amounts of Financial Instruments

	As of March 31, 2018				As of December 31, 2017
	Carrying Amount		Estimated Fair Value		Carrying Amount		Estimated Fair Value
Cash and cash equivalents	$	167,845	$	167,845	$	197,337	$	197,337
Restricted cash		47,524		47,524		46,012		46,012
Notes receivable, net		424,117		510,000		426,858		525,000
Lines-of-credit, notes payable, and receivable-
backed notes payable		497,098		502,600		521,312		529,400
Junior subordinated debentures		70,677		87,000		70,384		88,500