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Restructuring charges - Additional Information (Detail) - USD ($)
$ in Thousands
 3 Months Ended 6 Months Ended
Jun. 26, 2016
Jun. 28, 2015
Jun. 26, 2016
Jun. 28, 2015
Restructuring Cost and Reserve [Line Items]        
Restructuring charges $ (119) $ 580 $ 9,849 $ 5,028
2015 Restructuring programs        
Restructuring Cost and Reserve [Line Items]        
Restructuring charges (247) 142 (10) 4,380
Aggregate restructuring charges incurred 6,300   6,300  
Restructuring reserve 800   800  
2014 Manufacturing footprint realignment plan        
Restructuring Cost and Reserve [Line Items]        
Restructuring charges 121 $ 507 (415) $ 670
Aggregate restructuring charges incurred 10,500   10,500  
Restructuring reserve 6,300   6,300  
Restructuring expenses 2,400   4,000  
2014 Manufacturing footprint realignment plan | Accelerated Depreciation And Other Costs        
Restructuring Cost and Reserve [Line Items]        
Restructuring charges 100      
Restructuring expenses     18,800  
Restructuring cost reversal $ 2,300   4,400  
Restructuring charges reversal     $ 400