Debt (Details) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2016	Dec. 31, 2015
Long-term Debt, by Current and Noncurrent [Abstract]
Total debt, net of debt issuance costs	$ 80,459	$ 81,286
Less: current portion	(1,869)	(1,829)
Total long-term debt, net of debt issuance costs	78,590	79,457
Long-term Debt, Other Disclosures [Abstract]
Fair value of long-term debt	79,800	81,000
Letters of credit outstanding, amount	2,900
Term Loan Credit Facility [Member]
Long-term Debt, by Current and Noncurrent [Abstract]
Long-term debt	78,200	78,600
Term Loan original issue discount	(427)	(507)
Term Loan unamortized debt issuance costs	(1,285)	(1,526)
Less: current portion	$ (318)	(318)
Long-term Debt, Other Disclosures [Abstract]
Covenant compliance, period for determination of excess cash flow	90 days
Covenant compliance, period for partial prepayment	105 days
Equipment Loan Facility [Member]
Long-term Debt, by Current and Noncurrent [Abstract]
Long-term debt	$ 3,971	4,719
Less: current portion	$ (1,551)	$ (1,511)