Consolidated Securitization Vehicles (Narrative) (Details) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2012	Dec. 31, 2011
Total assets	$ 322,343	$ 1,366,316
Total liabilties	168,890	1,495,255
Consolidated Securization Vehicles
Total assets		1,000,000
Total liabilties		1,200,000
Number of consolidated securization vehicles	2
Maximum exposure to loss	6,200
Number of loans in maturity default	1
Book value of loans in maturity default	27,000
Consolidated Securization Vehicles | Subordinated interests in mortgages
Number of modifications, troubled debt restructuring	1
Troubled debt restructuring - loan principal balance	6,600
Trouble debt restructing - impairment	4,600
Consolidated Securization Vehicles | CT CDOs
Loans receivable, CT CDOs	$ 141,500	$ 145,500