Loans Receivable - Interest, Dividend and Discount Accretion Income (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013
Receivables [Abstract]
Interest on loan assets	$ 2,366	$ 3,446	$ 4,871	$ 7,900
Exit fee/prepayment penalty	0	0	1,787	0
Accretion of loan discount	386	761	1,591	1,477
Interest and dividends on REIT securities	0	100	0	250
Total interest, dividends, and discount accretion	$ 2,752	$ 4,307	$ 8,249	$ 9,627