Real Estate Securities, Available for Sale (Details) (USD $)	3 Months Ended		6 Months Ended
	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013	Dec. 31, 2013
Real estate securities
Fair Value	$ 70,500,000		$ 70,500,000		$ 66,450,000
Unrealized gains (losses) recorded in OCI	1,725,000	1,042,000	3,446,000	1,987,000
CMBS
Real estate securities
Number (security)	8		8		8
Principal Amount	104,542,000		104,542,000		104,542,000
Amortized Cost	54,010,000		54,010,000		53,406,000
Cumulative Unrealized Gain on Investments	16,971,000		16,971,000		13,373,000
Cumulative Unrealized (Loss) on Investment	(481,000)		(481,000)		(329,000)
Fair Value	70,500,000		70,500,000		66,450,000
Weighted Average Coupon (as a percent)	4.53%		4.53%		4.53%
Weighted Average, Unleveraged Current Yield (as a percent)	9.07%		9.07%		9.07%
Carrying value of securities served as collateral for the company's financing transactions	17,700,000		17,700,000
Unrealized gains (losses) recorded in OCI	1,700,000	1,000,000	3,400,000	2,000,000
Number (security)	2		2
Unrealized loss			500,000
Weighted average contractual maturities of the CRE securities			33 years
Weighted average expected maturity of CRE securities			7 years 1 month 0 days
Loss Position
Real estate securities
Fair Value	$ 17,700,000		$ 17,700,000
Maximum
Real estate securities
Fair Value			12 months