Borrowings - Secured Financing (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Jul. 31, 2015	Jul. 30, 2015
Debt Instrument [Line Items]
Total Issued To Third-Parties	$ 630,800
Total loan amount securitized in secured financing in 2015	$ 745,580
Issuance 2015-B
Debt Instrument [Line Items]
Total Issued To Third-Parties		$ 630,800
Weighted Average Life	4 years 8 months 55 days
London Interbank Offered Rate (LIBOR) | Issuance 2015-B
Debt Instrument [Line Items]
Derivative basis spread on variable rate			1.53%