Borrowings from Secured and Unsecured Debt Financings (Details 1) (Secured Debt, USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2013		Dec. 31, 2012
Securitization No. 1 | Credit Agricole Corporate And Investment Bank
Debt Instrument [Line Items]
Available Liquidity	$ 42,000	[1]	$ 42,000	[1]
Unused Fee	0.45%	[1]
Securitization No. 1 | London Interbank Offered Rate (LIBOR)
Debt Instrument [Line Items]
Interest Rate on any Advances	100.00%	[1]
Securitization No. 2 | HSH Nordbank AG
Debt Instrument [Line Items]
Available Liquidity	$ 65,000	[1]	$ 65,000	[1]
Unused Fee	0.50%	[1]
Securitization No. 2 | London Interbank Offered Rate (LIBOR)
Debt Instrument [Line Items]
Interest Rate on any Advances	75.00%	[1]

[1] Following a ratings downgrade by each of the facility providers, the liquidity facility was drawn, and the proceeds, or permitted investments thereof, remain available to provide liquidity if required. Amounts drawn following a ratings downgrade with respect to the liquidity facility provider do not bear interest; however, net investment earnings will be paid to the liquidity facility provider, and the unused fee continues to apply.