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Share-Based Compensation - Summary of Restricted Stock Award Activity and Performance Share Award Activity (Detail) - $ / shares
6 Months Ended
Jun. 27, 2020
Jun. 29, 2019
Restricted Stock Awards    
Restricted Stock Awards and Units    
Outstanding at beginning of period (in shares) 434,641  
Granted (in shares) 145,299  
Released (in shares) (268,063)  
Forfeited (in shares) (6,697)  
Outstanding at end of period (in shares) 305,180  
Weighted-Average Grant Date Fair Value    
Outstanding at beginning of year (USD per share) $ 151.52  
Released (USD per share) 244.01  
Vested (USD per share) 132.61  
Forfeited (USD per share) 159.57  
Outstanding at end of year (USD per share) $ 211.69  
Restricted Stock Awards | Nonemployee directors    
Restricted Stock Awards and Units    
Granted (in shares) 6,314 7,371
Restricted Stock Awards | Maximum    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Vesting period 3 years  
Performance Shares    
Restricted Stock Awards and Units    
Outstanding at beginning of period (in shares) 170,749  
Granted (in shares) 98,174  
Released (in shares) (129,344)  
Forfeited (in shares) (280)  
Outstanding at end of period (in shares) 139,299  
Weighted-Average Grant Date Fair Value    
Outstanding at beginning of year (USD per share) $ 144.47  
Released (USD per share) 239.44  
Vested (USD per share) 159.76  
Forfeited (USD per share) 204.76  
Outstanding at end of year (USD per share) $ 198.21