Related Party Transactions (Details) (USD $)					3 Months Ended					1 Months Ended				1 Months Ended		3 Months Ended	1 Months Ended	3 Months Ended		3 Months Ended
	Mar. 31, 2013	Dec. 31, 2012	Aug. 31, 2012 Swap AIGFP item	Jul. 31, 2012 Swap AIGFP item	Mar. 31, 2013 SLFI	Mar. 31, 2012 SLFI	Jan. 11, 2013 SLFI	Dec. 31, 2012 SLFI	Jan. 10, 2012 SLFI	Aug. 31, 2012 SLFI AIGFP	Mar. 31, 2013 SLFI AIGFP	Dec. 31, 2012 SLFI AIGFP	Jul. 31, 2012 SLFI AIGFP	Dec. 31, 2012 SLFI SLFSSC	Aug. 31, 2012 SLFI SLFSSC	Mar. 31, 2013 SLFI SLFSSC	Feb. 28, 2013 SLFI SLFSSC Services Agreement	Mar. 31, 2013 SGSC SFMC Services Agreement	Dec. 31, 2012 SGSC SFMC Services Agreement	Mar. 31, 2013 SGSC SFMC License Agreement	Mar. 31, 2013 SGSC SFMC Building lease item	Mar. 31, 2013 Second Street Funding Corporation	Dec. 31, 2012 Second Street Funding Corporation
Related party transactions
Note receivable from SLFI	$ 537,989,000	$ 537,989,000			$ 538,000,000			$ 538,000,000
Interest receivable on note	85,151,000	89,751,000			1,500,000			1,500,000
Interest rate for the unpaid principal balance					prime rate
Interest revenue on note receivable					4,300,000	4,300,000
Receivables from parent and affiliates																						16,600,000	16,200,000
Amount that will be received by counterparty														11,000,000	25,000,000
Annual fee rate on average monthly unreimbursed amount (as a percent)														8.00%	8.00%
Additional amount paid towards settlement														5,800,000			3,100,000
Resulting amount payable towards settlement														30,800,000
Interest payable														100,000
Fees paid					100,000											600,000
Capital contributions received to satisfy hybrid debt semi-annual interest payments							10,500,000		10,500,000
Amount of cash collateral posted by related party											40,000,000	40,000,000	60,000,000
Number of positions				2
Number of positions terminated			1
Reduction in cash collateral										20,000,000
Fees payable					300,000			300,000										7,800,000	1,900,000
Service fee expenses																		32,800,000
Percentage of allocated cost of service																		100.00%
Percentage of actual cost incurred																				100.00%
Margin on the systems and software (as a percent)																				7.00%
License fees																				1,500,000
Number of buildings leased																					6
Annual rental fees																					3,700,000
Rent charged																					$ 1,000,000