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Debt (Details) - USD ($)
$ in Thousands
Jun. 28, 2019
Dec. 31, 2018
Debt Instrument [Line Items]    
Total current portion of long-term debt   $ 4,535
Total long-term debt $ 214,562 202,843
Total Senior Credit Facilities 214,562 207,378
Term Loan    
Debt Instrument [Line Items]    
Current portion of long-term debt, Gross   4,600
Long-term debt, Gross 58,425 69,925
Term Loan And Revolving Credit Facility    
Debt Instrument [Line Items]    
Less: unamortized debt issuance costs   (65)
Less: unamortized debt issuance costs (1,683) (2,140)
Revolving Credit Facility    
Debt Instrument [Line Items]    
Long-term debt, Gross $ 157,820 $ 135,058