Previously Consolidated Variable Interest Entities (Details 11) (USD $) In Thousands, unless otherwise specified			12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2011 Securitized Debt Obligations		Dec. 31, 2011 Previously Consolidated Variable Interest Entities		Dec. 31, 2011 Previously Consolidated Variable Interest Entities Repurchase Obligations (JP Morgan)		Dec. 31, 2011 Previously Consolidated Variable Interest Entities Mezzanine Loans		Dec. 31, 2011 Previously Consolidated Variable Interest Entities CT CDO II		Dec. 31, 2011 Previously Consolidated Variable Interest Entities CT CDO III		Dec. 31, 2011 Previously Consolidated Variable Interest Entities CT CDO IV		Dec. 31, 2011 Previously Consolidated Variable Interest Entities JPMCC 2004-FL1A		Dec. 31, 2011 Previously Consolidated Variable Interest Entities GMACC 1997-C1		Dec. 31, 2011 Previously Consolidated Variable Interest Entities GECMC 00-1 H		Dec. 31, 2011 Previously Consolidated Variable Interest Entities MSC 2007-XLCA		Dec. 31, 2011 CT Legacy REIT
Principal Balance			$ 1,039,031		$ 1,162,770		$ 58,464		$ 65,275	[1]	$ 199,751		$ 199,138		$ 221,540				$ 83,672		$ 24,847		$ 310,083		$ 123,739
Book Value, ending year	$ 139,184	$ 1,211,407	$ 1,039,446		$ 1,153,021		$ 58,464		$ 55,111	[1]	$ 199,751		$ 199,553		$ 221,540				$ 83,672		$ 24,847		$ 310,083		$ 113,575
Coupon			2.84%	[2]	3.52%	[2]	2.80%	[2]	15.00%	[1],[2]	0.91%	[2]	5.26%	[2]	1.07%	[2]	1.25%	[2],[3]	7.09%	[2]	5.50%	[2]	2.44%	[2]	9.24%	[2]
All-In Cost			2.92%	[2]	3.66%	[2],[4]	2.80%	[2]	18.61%	[1],[2]	1.22%	[2]	5.17%	[2]	1.21%	[2]	1.25%	[2],[3]	7.09%	[2]	5.50%	[2]	2.44%	[2]	10.47%	[2]
Maturity Date			Jan. 31, 2034	[5]	Jan. 31, 2032	[5]	Dec. 15, 2014	[5]	Mar. 31, 2016	[1],[5]	Mar. 31, 2050	[5]	Jun. 30, 2035	[5]	Oct. 31, 2043	[5]	Apr. 30, 2019	[3],[5]	Jul. 31, 2029	[5]	Aug. 31, 2027	[5]	Jul. 31, 2017	[5]	Aug. 31, 2015	[5]

[1] The mezzanine loan carries a 10.50% per annum interest rate, of which 7.0% per annum may be deferred. The all-in cost of the mezzanine loan includes the amortization of deferred fees and expenses.

[2] Represents a weighted average for each respective facility, assuming LIBOR of 0.21% at December 31, 2012 for floating rate debt obligations.

[3] As of December 31, 2011, all outstanding debt obligations of JPMCC 2004-FL1A were eliminated in consolidation.

[4] Including the impact of interest rate hedges with an aggregate notional balance of $357.4 million as of December 31, 2011, the effective all-in cost of our previously consolidated VIEs' debt obligations would be 5.30% per annum.

[5] Maturity dates represent the contractual maturity of each debt obligation. Repayment of securitized debt is a function of collateral cash flows which are disbursed in accordance with the contractual provisions of each trust, and is generally expected to occur prior to the maturity date above.