Fair Value (Details) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2012	Dec. 31, 2011	Feb. 10, 2012 ExcludingSecuritizationVehiclesMember	Dec. 31, 2012 Recurring Basis ExcludingSecuritizationVehiclesMember	Dec. 31, 2012 Recurring Basis ExcludingSecuritizationVehiclesMember Significant Unobservable Inputs (Level 3)	Dec. 31, 2012 Nonrecurring Basis Consolidated Securization Vehicles		Dec. 31, 2012 Nonrecurring Basis Consolidated Securization Vehicles Significant Unobservable Inputs (Level 3)
Measured on a recurring basis:
Investment in CT Legacy Asset, at fair value	$ 132,000		$ 89,700	$ 132,000	$ 132,000
Securization vehicles' impaired loans receivable:
Subordinate interests in mortgages						$ 2,000	[1]	$ 2,000	[1]

[1] Loans receivable against which we have recorded a provision for loan losses as of December 31, 2012.