Debt Obligations Portfolio Warehouse Facilities (Details) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2012		Dec. 31, 2011
Line of Credit Facility [Line Items]
Portfolio Warehouse Facilities	$ 57,200		$ 141,392
Facility Amount	425,000		550,000
Deutsche Bank Warehouse Facility [Member]
Line of Credit Facility [Line Items]
Portfolio Warehouse Facilities	19,300		39,000
Facility Amount	150,000		150,000
Advance Rate	65.00%		58.00%
Collateral	38,881	[1]	110,000	[1]
Interest Rate	2.46%	[2]	2.54%	[2]
Wells Fargo Warehouse Facility [Member]
Line of Credit Facility [Line Items]
Portfolio Warehouse Facilities	23,000		40,000
Facility Amount	150,000		150,000
Advance Rate	58.00%		58.00%
Collateral	42,778	[1]	78,500	[1]
Interest Rate	2.46%	[2]	2.53%	[2]
RBS Warehouse Facility [Member]
Line of Credit Facility [Line Items]
Portfolio Warehouse Facilities	14,900	[3]	30,600
Facility Amount	125,000	[3]	125,000
Advance Rate	53.00%	[3]	53.00%
Collateral	26,707	[1],[3]	100,400	[1]
Interest Rate	1.65%	[2],[3]	1.88%	[2]
UBS Warehouse Facility [Member]
Line of Credit Facility [Line Items]
Portfolio Warehouse Facilities			31,792
Facility Amount			125,000
Advance Rate			60.00%
Collateral			$ 105,500	[1]
Interest Rate			2.18%	[2]

[1] Collateral represents underlying pools of finance receivables pledged to each facility.

[2] Interest rate at period end equal to contractual benchmark plus index.

[3] Facility was renewed in March 2013. See Note 16 - Subsequent Events for information on renewal of this facility.