Debt (Details) - USD ($) $ in Thousands	Mar. 31, 2016	Dec. 31, 2015
Debt Instrument [Line Items]
Deferred Debt Issuance Cost		$ (4,200)
Partner Synthetic Participations
Debt Instrument [Line Items]
Outstanding debt, gross	$ 6,707	6,861
Funding debt
Debt Instrument [Line Items]
Outstanding debt, gross	469,344	380,112
Deferred Debt Issuance Cost	(3,716)	(4,222)
Outstanding debt, net	$ 465,628	375,890
ODAST Agreement Due May 2018 | Secured Debt
Debt Instrument [Line Items]
Weighted Average Interest Rate	3.40%
Outstanding debt, gross	$ 174,982	174,980
PORT Agreement Due June 2017 | Revolving Credit Facility
Debt Instrument [Line Items]
Weighted Average Interest Rate	2.70%
Outstanding debt, gross	$ 78,289	59,415
RAOD Agreement Due May 2017 | Revolving Credit Facility
Debt Instrument [Line Items]
Weighted Average Interest Rate	3.40%
Outstanding debt, gross	$ 78,968	47,465
ODART Agreement Due September 2017 | Revolving Credit Facility
Debt Instrument [Line Items]
Weighted Average Interest Rate	2.70%
Outstanding debt, gross	$ 33,462	42,090
ODAC Agreement Due May 2017 | Revolving Credit Facility
Debt Instrument [Line Items]
Weighted Average Interest Rate	8.70%
Outstanding debt, gross	$ 35,133	27,699
SBAF Agreement Due April 2016 through August 2017 | Revolving Credit Facility
Debt Instrument [Line Items]
Weighted Average Interest Rate	6.70%
Outstanding debt, gross	$ 9,708	12,783
ODAP Agreement Due August 2017 | Revolving Credit Facility
Debt Instrument [Line Items]
Weighted Average Interest Rate	5.00%
Outstanding debt, gross	$ 52,095	8,819
Corporate Debt
Debt Instrument [Line Items]
Outstanding debt, net	$ 2,697	2,695
Corporate Debt | Revolving Credit Facility
Debt Instrument [Line Items]
Weighted Average Interest Rate	4.50%
Outstanding debt, gross	$ 2,700	2,700
Deferred Debt Issuance Cost	$ (3)	$ (5)