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Long-Term Obligations - Narrative (Details)
€ in Millions
6 Months Ended
Aug. 09, 2017
USD ($)
Mar. 02, 2017
USD ($)
Mar. 02, 2017
EUR (€)
Jul. 01, 2017
USD ($)
Jul. 02, 2016
USD ($)
May 24, 2017
USD ($)
Dec. 31, 2016
USD ($)
Debt Instrument [Line Items]              
Proceeds from issuance of debt       $ 8,000,000 $ 46,046,000    
Payment of debt issuance costs       1,147,000 $ 0    
Unamortized debt issuance costs       $ 1,325,000      
Weighted average interest rate for revolving credit facility (in hundredths)       1.78%      
Loan receivable       $ 357,000      
Capital lease obligations       4,557,000     $ 4,309,000
Revolving Credit Facility [Member]              
Debt Instrument [Line Items]              
Revolving Credit Facility, due 2022       60,673,000     $ 61,494,000
Remaining borrowing capacity       239,841,000      
Revolving Credit Facility [Member] | 2017 Credit Agreement [Member]              
Debt Instrument [Line Items]              
Payment of debt issuance costs       1,147,000      
Revolving Credit Facility [Member] | Euro-Denominated Borrowing [Member]              
Debt Instrument [Line Items]              
Revolving Credit Facility, due 2022       $ 25,673,000      
Capital Lease Obligations [Member] | Sale Leaseback Arrangement [Member]              
Debt Instrument [Line Items]              
Effective interest rate       1.70%      
Net purchase option       $ 1,518,000      
Capital lease obligations       4,444,000      
Capital Lease Obligations [Member] | PAAL Equipment Capital Lease [Member]              
Debt Instrument [Line Items]              
Capital lease obligations       $ 113,000      
Weighted average interest rate       3.43%      
Remaining term       2 years 8 months 12 days      
Revolving Credit Facility [Member] | 2017 Credit Agreement [Member]              
Debt Instrument [Line Items]              
Term of unsecured revolving credit facility   5 years 5 years        
Borrowing capacity available under committed portion   $ 200,000,000       $ 300,000,000  
Additional borrowing capacity   $ 100,000,000          
Basis spread on variable rate floor (as a percentage)   0.00% 0.00%        
Percentage of foreign unrestricted cash   65.00%          
Maximum unrestricted cash   $ 30,000,000          
Proceeds from issuance of debt   $ 42,000,000 € 26.3        
Maximum consolidated leverage ratio   3.5 3.5        
Minimum consolidated interest coverage ratio   3 3        
Revolving Credit Facility [Member] | 2017 Credit Agreement [Member] | Federal Funds Rate [Member]              
Debt Instrument [Line Items]              
Basis spread on variable rate (in hundredths)   0.50% 0.50%        
Revolving Credit Facility [Member] | 2017 Credit Agreement [Member] | Thirty-day LIBOR [Member]              
Debt Instrument [Line Items]              
Basis spread on variable rate (in hundredths)   0.50% 0.50%        
Revolving Credit Facility [Member] | 2017 Credit Agreement [Member] | LIBOR [Member] | Minimum [Member]              
Debt Instrument [Line Items]              
Basis spread on variable rate (in hundredths)   1.00% 1.00%        
Revolving Credit Facility [Member] | 2017 Credit Agreement [Member] | LIBOR [Member] | Maximum [Member]              
Debt Instrument [Line Items]              
Basis spread on variable rate (in hundredths)   2.00% 2.00%        
Subsequent Event [Member] | Revolving Credit Facility [Member]              
Debt Instrument [Line Items]              
Proceeds from borrowings $ 170,018,000            
Subsequent Event [Member] | Revolving Credit Facility [Member] | Euro-Denominated Borrowing [Member]              
Debt Instrument [Line Items]              
Proceeds from borrowings 61,769,000            
Subsequent Event [Member] | Revolving Credit Facility [Member] | Canadian-Denominated Borrowing [Member]              
Debt Instrument [Line Items]              
Proceeds from borrowings $ 62,690,000