Loans Receivable - Interest and Discount Accretion Income (Detail) - USD ($) $ in Thousands	7 Months Ended	12 Months Ended
	Jul. 31, 2014	Dec. 31, 2014	Dec. 31, 2013
Receivables [Abstract]
Interest on loan assets	$ 5,770		$ 14,334
Exit fee/prepayment penalty	1,787
Accretion of loan discount	2,086	$ 2,086	4,121
Total interest and discount accretion	$ 9,643		$ 18,455