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Summary of Significant Accounting Policies - Supplemental Cash Flow Information (Detail) - USD ($)
$ in Thousands
 3 Months Ended
Mar. 31, 2018
Apr. 01, 2017
Dec. 30, 2017
Dec. 31, 2016
Accounting Policies [Abstract]        
Income taxes $ 1,023 $ 3,157    
Interest 169 213    
Unpaid purchases of property, plant and equipment 1,492 1,203    
Unsettled common stock proceeds from option exercises 794 2,560    
Cash and cash equivalents 369,498 343,825 $ 315,302  
Restricted cash 152 679    
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents $ 369,650 $ 344,504 $ 315,483 $ 308,198