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Debt and Capital Lease Obligations - Schedule of Long-term Debt and Capital Lease Obligations (Details) - USD ($)
$ in Thousands
Dec. 31, 2018
Dec. 31, 2017
Debt Instrument [Line Items]    
Less unamortized debt issuance costs $ (2,310) $ (984)
Total debt 225,482 206,338
Capital lease obligations, 4.5% weighted-average interest rate at December 31, 2018 and 3.8% at December 31, 2017, due through 2021 4,639 2,854
Total debt and capital lease obligations 230,121 209,192
Current portion [1] (229,416) (152,599)
Long-term debt and capital lease obligations 705 56,593
2018 Credit Agreement | Revolving Credit Facility    
Debt Instrument [Line Items]    
Revolving credit facility and term loan gross [2] $ 227,792  
Amended and Restated Credit Agreement | Revolving Credit Facility    
Debt Instrument [Line Items]    
Revolving credit facility and term loan gross [2]   $ 207,322
[1] Borrowings under the revolving credit facilities are classified as current because all borrowed amounts are due within one year.
[2] Represents the weighted-average interest rate in effect at the respective periods for the revolving credit facilities and term loan borrowings, including any applicable margin. The interest rates do not include amortization of debt issuance costs or commitment fees.