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Business Segment Information - Summary of Net Sales by Customer Class (Detail) - USD ($)
$ in Thousands
 3 Months Ended
Mar. 31, 2018
Apr. 01, 2017
Revenue, Major Customer [Line Items]    
Total net sales $ 530,670 $ 497,969
Customer Concentration Risk [Member]    
Revenue, Major Customer [Line Items]    
Total net sales 530,670 497,969
Customer Concentration Risk [Member] | Pharmaceutical [Member]    
Revenue, Major Customer [Line Items]    
Total net sales 305,328 279,810
Customer Concentration Risk [Member] | Industrial [Member]    
Revenue, Major Customer [Line Items]    
Total net sales 162,330 161,303
Customer Concentration Risk [Member] | Governmental and Academic [Member]    
Revenue, Major Customer [Line Items]    
Total net sales $ 63,012 $ 56,856