Secured Borrowings (Details) (ClearPoint, USD $)						6 Months Ended								1 Months Ended
	Jun. 30, 2012	Dec. 31, 2011	Jul. 31, 2012 Credit facility	Jun. 30, 2012 Credit facility	Dec. 31, 2011 Credit facility	Jun. 30, 2012 Credit Facility No. 1	Dec. 31, 2011 Credit Facility No. 1	Jul. 31, 2012 Credit Facility No. 2	Jun. 30, 2012 Credit Facility No. 2	Dec. 31, 2011 Credit Facility No. 2	Jul. 31, 2012 Credit Facility No. 3	Jun. 30, 2012 Credit Facility No. 3	Dec. 31, 2011 Credit Facility No. 3	Mar. 31, 2012 Accelerated Purchase Facility	Dec. 31, 2011 Accelerated Purchase Facility
Secured Borrowings
Facility Limit	$ 150,000,000	$ 300,000,000	$ 90,000,000	$ 150,000,000	$ 300,000,000		$ 75,000,000	$ 45,000,000	$ 75,000,000	$ 75,000,000	$ 45,000,000	$ 75,000,000	$ 100,000,000		$ 50,000,000
Outstanding Balance	46,718,000	213,611,000		46,718,000	211,262,000		68,756,000		21,854,000	49,704,000		24,864,000	92,802,000		2,349,000
Committed capacity				$ 0	$ 100,000,000
Extension period after due date						120 days								120 days