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Debt (Details) - USD ($)
$ in Thousands
Jun. 30, 2017
Dec. 31, 2016
Debt Instrument [Line Items]    
Total current portion of long-term debt $ 7,371 $ 7,366
Total long-term debt 104,176 70,554
Second Amendment    
Debt Instrument [Line Items]    
Total current portion of long-term debt 7,371 7,366
Total long-term debt 104,176 70,554
Total Senior Credit Facilities 111,547 77,920
Second Amendment | Term Loans    
Debt Instrument [Line Items]    
Current portion of long-term debt, Gross 7,500 7,500
Long-term debt, Gross 60,000 63,750
Second Amendment | Term Loan And Revolving Credit Facility    
Debt Instrument [Line Items]    
Less: unamortized debt issuance costs (129) (134)
Less: unamortized debt issuance costs (2,824) (3,196)
Second Amendment | Revolving Credit Facility    
Debt Instrument [Line Items]    
Long-term debt, Gross $ 47,000 $ 10,000