Loans Receivable (Details 2) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Interest and dividends detail:
Interest on loan assets	$ 11,736	$ 11,073	$ 5,691
Accretion of loan discount	8,333	13,401	8,782
Interest and dividends on REIT securities	1,054	984	2,655
Total interest and dividends	$ 21,123	$ 25,458	$ 17,128