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Summary of Significant Accounting Policies - Supplemental Cash Flow Information (Detail) - USD ($)
 6 Months Ended
Jul. 03, 2021
Jun. 27, 2020
Jan. 02, 2021
Dec. 28, 2019
Accounting Policies [Abstract]        
Interest expense $ 196,000 $ 130,000    
Income taxes 24,152,000 10,049,000    
Operating lease liabilities 3,676,000 3,038,000    
ROU assets obtained in exchange for lease liabilities 4,423,000 7,394,000    
Unpaid purchases of property and equipment 2,381,000 3,135,000    
Noncash or Part Noncash Acquisition, Intangible Assets Acquired 3,000,000      
Settlement of promissory note receivable in connection with business combination $ 0 5,100,000    
Transfer to Investments 6,000      
Deposit release to acquire noncontrolling interest(1) $ 3,374,000 0    
Unsettled common stock proceeds from option exercises 202,000 94,000    
Fair value of common stock received for payment of stock option exercise price 0 220,000    
Cash and cash equivalents 575,955,000 631,881,000 $ 641,447,000  
Restricted cash 1,388,000 3,376,000    
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents $ 577,343,000 $ 635,257,000 $ 645,004,000 $ 568,075,000