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Debt (Details) - USD ($)
$ in Thousands
Mar. 29, 2019
Dec. 31, 2018
Debt Instrument [Line Items]    
Total current portion of long-term debt $ 2,240 $ 4,535
Total long-term debt 198,203 202,843
Total Senior Credit Facilities 200,443 207,378
Term Loan    
Debt Instrument [Line Items]    
Current portion of long-term debt, Gross 2,300 4,600
Long-term debt, Gross 67,625 69,925
Term Loan And Revolving Credit Facility    
Debt Instrument [Line Items]    
Less: unamortized debt issuance costs (60) (65)
Less: unamortized debt issuance costs (1,902) (2,140)
Revolving Credit Facility    
Debt Instrument [Line Items]    
Long-term debt, Gross $ 132,480 $ 135,058