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Debt (Details) - USD ($)
$ in Thousands
Sep. 29, 2017
Aug. 31, 2017
Jul. 28, 2017
Dec. 31, 2016
Debt Instrument [Line Items]        
Total current portion of long-term debt $ 9,115     $ 7,366
Total long-term debt 234,188     70,554
Third Amendment        
Debt Instrument [Line Items]        
Total current portion of long-term debt 9,115      
Total long-term debt 234,188      
Total Senior Credit Facilities 243,303      
Second Amendment        
Debt Instrument [Line Items]        
Total current portion of long-term debt       7,366
Total long-term debt       70,554
Total Senior Credit Facilities       77,920
Term Loans | Third Amendment        
Debt Instrument [Line Items]        
Current portion of long-term debt, Gross 9,200      
Long-term debt, Gross 81,425      
Total Senior Credit Facilities   $ 90,600    
Term Loans | Second Amendment        
Debt Instrument [Line Items]        
Current portion of long-term debt, Gross       7,500
Long-term debt, Gross       63,750
Total Senior Credit Facilities     $ 65,600  
Term Loan And Revolving Credit Facility | Third Amendment        
Debt Instrument [Line Items]        
Less: unamortized debt issuance costs (85)      
Less: unamortized debt issuance costs (3,306)      
Term Loan And Revolving Credit Facility | Second Amendment        
Debt Instrument [Line Items]        
Less: unamortized debt issuance costs       (134)
Less: unamortized debt issuance costs       (3,196)
Revolving Credit Facility | Third Amendment        
Debt Instrument [Line Items]        
Long-term debt, Gross $ 156,069      
Revolving Credit Facility | Second Amendment        
Debt Instrument [Line Items]        
Long-term debt, Gross       $ 10,000