Loans Receivable - Activity Related to Loans Receivable (Detail) - USD ($) $ in Thousands	1 Months Ended	2 Months Ended	7 Months Ended	9 Months Ended
	Jul. 31, 2014	Sep. 30, 2014	Jul. 31, 2014	Sep. 30, 2015	Sep. 30, 2014
Receivables [Abstract]
Balance at beginning of period			$ 101,100	$ 24,005	$ 101,100
Purchase and advances					35,992
Interest received, net				(191)	(81)
Repayments/sale proceeds/forgiveness				(15,428)	(81,739)
Loan discount accretion	$ 495		2,086		2,086
Discount accretion received in cash			$ (5,865)		(5,865)
Adjustment for conversion to liquidation basis					6,071
Change in liquidation value		$ 4,750			4,750
Balance at end of period		$ 62,314		$ 8,386	$ 62,314