Subsequent Events (Details) (USD $)					0 Months Ended	3 Months Ended	12 Months Ended
	Dec. 31, 2013 Term ABS 2013-2 [Member]		Jan. 31, 2014 2021 Senior Notes [Member] Subsequent Event [Member]	Dec. 31, 2013 2017 Senior Notes [Member]	Feb. 21, 2014 2017 Senior Notes [Member] Scenario, Forecast [Member]	Mar. 31, 2014 2017 Senior Notes [Member] Scenario, Forecast [Member]	Dec. 31, 2013 2017 Senior Notes [Member] Subsequent Event [Member]	Jan. 31, 2014 2017 Senior Notes [Member] Subsequent Event [Member]
Subsequent Event [Line Items]
Debt financing amount	$ 197,800,000	[1]	$ 300,000,000	$ 350,000,000				$ 350,000,000
Senior notes stated interest rate			6.125%	9.125%
Redemption date							Feb. 21, 2014
Percentage of principal amount redeemed					104.563%
Gain (loss) on extinguishment of debt						$ (21,700,000)

[1] Financing made available only to a specified subsidiary of the Company.