Debt Obligations - Schedule of Debt Obligations (Details) - USD ($) $ in Thousands		12 Months Ended
		Dec. 31, 2016		Dec. 31, 2015
Debt Instrument [Line Items]
Principal Borrowings Outstanding		$ 771,852		$ 415,850
Unamortized Debt Issuance Costs, Current		(217)
Unamortized Debt Issuance Costs, Long-term		(14,655)
Current portion of long-term debt		6,252
Long-term debt, net of current portion		750,728		415,850
Unused Borrowing Capacity		238,000		105,900
Bank Of America Aggregation Credit Facility
Debt Instrument [Line Items]
Principal Borrowings Outstanding		187,000		269,100
Unamortized Debt Issuance Costs, Current		(4,000)
Unamortized Debt Issuance Costs, Long-term		(900)
Long-term debt, net of current portion		187,000		269,100
Unused Borrowing Capacity		$ 188,000		$ 105,900
Interest Rate		4.20%		3.80%
Maturity Date		Mar. 12, 2018		Mar. 12, 2018
Bank Of America Working Capital Credit Facility
Debt Instrument [Line Items]
Principal Borrowings Outstanding		$ 136,500	[1]	$ 146,750
Unamortized Debt Issuance Costs, Current		(500)
Unamortized Debt Issuance Costs, Long-term		(1,200)
Long-term debt, net of current portion		$ 136,500	[1]	$ 146,750
Interest Rate		3.90%	[1]	3.50%
Maturity Date		Mar. 31, 2020	[1]	Mar. 31, 2020
2016 Term Loan Facility
Debt Instrument [Line Items]
Principal Borrowings Outstanding		$ 297,506
Unamortized Debt Issuance Costs, Current		(169)
Unamortized Debt Issuance Costs, Long-term		(9,643)
Current portion of long-term debt		4,788
Long-term debt, net of current portion		$ 282,906
Interest Rate	[2]	3.60%
Maturity Date		Aug. 31, 2021
Subordinated HoldCo Credit Facility
Debt Instrument [Line Items]
Principal Borrowings Outstanding		$ 149,500
Unamortized Debt Issuance Costs, Current		(47)
Unamortized Debt Issuance Costs, Long-term		(4,851)
Current portion of long-term debt		1,453
Long-term debt, net of current portion		143,149
Unused Borrowing Capacity		$ 50,000
Interest Rate		8.60%
Maturity Date		Mar. 31, 2020
Credit Agreement
Debt Instrument [Line Items]
Principal Borrowings Outstanding		$ 1,346
Unamortized Debt Issuance Costs, Current		(1)
Unamortized Debt Issuance Costs, Long-term		(161)
Current portion of long-term debt		11
Long-term debt, net of current portion		$ 1,173
Interest Rate		6.50%

[1] Facility is recourse debt, which refers to debt that is collateralized by the Company’s general assets. All of the Company’s other debt obligations are non-recourse, which refers to debt that is only collateralized by specified assets or subsidiaries of the Company.

[2] The interest rate of this facility is partially hedged to an effective interest rate of 4.0% for $270.0 million of the principal borrowings outstanding. See Note 12—Derivative Financial Instruments.