Debt (Details) - USD ($) $ in Thousands	Sep. 30, 2016	Dec. 31, 2015
Debt Instrument [Line Items]
Deferred Debt Issuance Cost		$ (4,200)
Partner Synthetic Participations
Debt Instrument [Line Items]
Outstanding debt, gross	$ 3,575	6,861
Funding debt
Debt Instrument [Line Items]
Outstanding debt, gross	656,922	380,112
Deferred Debt Issuance Cost	(5,169)	(4,222)
Outstanding debt, net	$ 651,753	375,890
ODAST II Agreement Due May 2020 | Secured Debt
Debt Instrument [Line Items]
Weighted average interest rate	4.70%
Outstanding debt, gross	$ 250,000	0
ODART Agreement Due September 2017 | Revolving Credit Facility
Debt Instrument [Line Items]
Weighted average interest rate	3.20%
Outstanding debt, gross	$ 106,182	42,090
RAOD Agreement Due May 2017 | Revolving Credit Facility
Debt Instrument [Line Items]
Weighted average interest rate	3.50%
Outstanding debt, gross	$ 99,985	47,465
PORT Agreement Due June 2017 | Revolving Credit Facility
Debt Instrument [Line Items]
Weighted average interest rate	2.80%
Outstanding debt, gross	$ 67,313	59,415
ODAF I Agreement Due August 2018 | Secured Debt
Debt Instrument [Line Items]
Weighted average interest rate	7.80%
Outstanding debt, gross	$ 64,521	0
ODAC Agreement Due May 2017 | Revolving Credit Facility
Debt Instrument [Line Items]
Weighted average interest rate	9.80%
Outstanding debt, gross	$ 59,888	27,699
SBAF Agreement Due April 2016 through August 2017 | Revolving Credit Facility
Debt Instrument [Line Items]
Weighted average interest rate	6.50%
Outstanding debt, gross	$ 5,458	12,783
ODAP Agreement Due August 2017 | Revolving Credit Facility
Debt Instrument [Line Items]
Weighted average interest rate	5.00%
Outstanding debt, gross	$ 0	8,819
ODAST Agreement Due May 2018 | Secured Debt
Debt Instrument [Line Items]
Weighted average interest rate	0.00%
Outstanding debt, gross	$ 0	174,980
Corporate Debt
Debt Instrument [Line Items]
Outstanding debt, net	$ 12,700	2,695
Corporate Debt | Revolving Credit Facility
Debt Instrument [Line Items]
Weighted average interest rate	4.50%
Outstanding debt, gross	$ 12,700	2,700
Deferred Debt Issuance Cost	$ 0	$ (5)