Long-Term Debt - Schedule of Debt (Details) - USD ($) $ in Thousands	Dec. 31, 2017	Dec. 31, 2016
Debt Instrument [Line Items]
Debt obligations	$ 144,086	$ 155,736
Capital lease obligation	565	861
Less: debt issuance costs	(1,652)	(2,930)
Debt obligation, net	142,434	152,806
Less: current portion	(5,820)	(5,817)
Long-term debt	136,614	146,989
Line of credit
Debt Instrument [Line Items]
Debt obligation, net	144,086
Line of credit \| Term loan facility
Debt Instrument [Line Items]
Debt obligations	115,538	121,875
Line of credit \| Revolving credit facility
Debt Instrument [Line Items]
Debt obligations	$ 27,983	$ 33,000

Amount equal to the present value (the principal) at the beginning of the lease term of minimum lease payments during the lease term (excluding that portion of the payments representing executory costs such as insurance, maintenance, and taxes to be paid by the lessor, together with any profit thereon) net of payments or other amounts applied to the principal through the balance sheet date.

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Amount, before unamortized (discount) premium and debt issuance costs, of long-term debt. Includes, but is not limited to, notes payable, bonds payable, commercial loans, mortgage loans, convertible debt, subordinated debt and other types of debt.

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Amount, after accumulated amortization, of debt issuance costs. Includes, but is not limited to, legal, accounting, underwriting, printing, and registration costs.

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Amount, after unamortized (discount) premium and debt issuance costs, of long-term debt, classified as current. Includes, but not limited to, notes payable, bonds payable, debentures, mortgage loans and commercial paper. Excludes capital lease obligations.

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