VIE Long-term Debt Issued by Securitization and Permanent Financing trusts, at Fair Market Value (Details) (USD $)				3 Months Ended			0 Months Ended
	Mar. 31, 2014	Dec. 31, 2013	Feb. 18, 2014 JGW-S LC II 2011-A	Mar. 31, 2014 VIE item	Mar. 31, 2013 VIE item	Dec. 31, 2013 VIE	Mar. 20, 2013 VIE 2013-1	Mar. 20, 2013 VIE 2013-1 Aaa	Mar. 20, 2013 VIE 2013-1 Baa2	Feb. 18, 2014 VIE 2014-1	Feb. 18, 2014 VIE 2014-1 Aaa	Feb. 18, 2014 VIE 2014-1 Baa2	Mar. 31, 2014 VIE Securitization trusts	Dec. 31, 2013 VIE Securitization trusts	Mar. 31, 2014 VIE Permanent financing VIEs	Dec. 31, 2013 VIE Permanent financing VIEs
VIE Long-term Debt Issued by Securitization and Permanent Financing trusts, at Fair Market Value
Number of asset securitization transactions completed				1	1
Bond proceeds							$ 216,500,000			$ 233,900,000
Receivables securitized							2,425,000			2,297,000
Deal discount rate (as a percent)							3.65%			4.24%
Retained interest %							6.75%			6.00%
Class allocation (as a percent)								85.25%	8.00%		85.25%	8.75%
Outstanding Principal				3,486,643,000		3,320,434,000							3,233,470,000	3,063,520,000	253,173,000	256,914,000
Fair Value	3,666,583,000	3,431,283,000		3,666,583,000		3,431,283,000							3,411,176,000	3,177,404,000	255,407,000	253,879,000
Maximum borrowing capacity			50,000,000
Increase in maximum borrowing capacity			$ 100,000,000