Derivative Financial Instruments - Additional Information (Details) (USD $)						1 Months Ended
	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2013	Jun. 30, 2014 Warrant	Dec. 31, 2013 Warrant	Mar. 31, 2014 Three-Month LIBOR
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Company pledged bonds retained in its own securitizations in exchange	$ 250,594,000	$ 250,594,000	$ 0
Variable rate of three-month LIBOR plus basis points						0.75%
Estimated fair value of warrant				$ 0	$ 0