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Debt (Details) - USD ($)
$ in Thousands
Sep. 27, 2019
Dec. 31, 2018
Debt Instrument [Line Items]    
Total current portion of long-term debt   $ 4,535
Total long-term debt $ 227,507 202,843
Total Senior Credit Facilities 227,507 207,378
Term Loan    
Debt Instrument [Line Items]    
Current portion of long-term debt, Gross   4,600
Long-term debt, Gross 56,125 69,925
Term Loan And Revolving Credit Facility    
Debt Instrument [Line Items]    
Less: unamortized debt issuance costs   (65)
Less: unamortized debt issuance costs (1,465) (2,140)
Revolving Credit Facility    
Debt Instrument [Line Items]    
Long-term debt, Gross $ 172,847 $ 135,058