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Debt - Schedule of Outstanding Debt (Details) - USD ($)
$ in Thousands
Mar. 31, 2018
Dec. 31, 2017
Mar. 31, 2017
Debt Instrument [Line Items]      
Total debt $ 154,776 $ 156,792 $ 178,376
Less: debt issuance costs (416) (444) (534)
Total debt, net of issuance costs 154,360 156,348 177,842
Less: current portion (8,652) (8,646) (23,656)
Long-term portion of debt 145,708 147,702 154,186
Capital Lease Obligations      
Debt Instrument [Line Items]      
Total debt 2,277 2,374 2,676
Revolving credit facility      
Debt Instrument [Line Items]      
Total debt 0 0 15,000
Term Loan      
Debt Instrument [Line Items]      
Total debt $ 152,499 $ 154,418 $ 160,700