Fair Value (Details 4) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2012	Dec. 31, 2011
Financial assets:
Investment in CT Legacy Asset	$ 132,000
Carrying Amount
Financial assets:
Cash and cash equivalents	15,423	34,818
Restricted cash	14,246	12,985
Investment in CT Legacy Asset	132,000
Securities held-to-maturity		361,574
Loans receivable, net	141,500	838,394
Financial liabilities:
Secured notes	8,497	7,847
Repurchase obligations		58,464
Mezzanine loan		55,111
Securitized debt obligations	139,184	1,211,407
Participations sold		116,747
Face Amount
Financial assets:
Cash and cash equivalents	15,423	34,818
Restricted cash	14,246	12,985
Securities held-to-maturity		520,191
Loans receivable, net	164,180	1,270,971
Financial liabilities:
Secured notes	8,497	7,847
Repurchase obligations		58,464
Mezzanine loan		55,111
Securitized debt obligations	139,184	1,210,992
Participations sold		116,747
Fair Value
Financial assets:
Cash and cash equivalents	15,423	34,818
Restricted cash	14,246	12,985
Investment in CT Legacy Asset	132,000
Securities held-to-maturity		351,818
Loans receivable, net	133,682	768,729
Financial liabilities:
Secured notes	7,374	6,436
Repurchase obligations		54,556
Mezzanine loan		71,475
Securitized debt obligations	89,880	767,619
Participations sold		$ 17,354