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Stock-Based Compensation Expense (Detail)
3 Months Ended 6 Months Ended
Jun. 30, 2019
USD ($)
group
$ / shares
shares
Jul. 01, 2018
USD ($)
$ / shares
Apr. 01, 2018
USD ($)
Apr. 02, 2017
USD ($)
Jun. 30, 2019
USD ($)
group
$ / shares
shares
Jul. 01, 2018
USD ($)
$ / shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Groups within the employee population | group 2       2  
Estimated annual forfeiture rate for unvested options for senior management 9.00%       9.00%  
Estimated annual forfeiture rate for unvested options for all other employees 12.00%       12.00%  
Increase (decrease) to compensation expense     $ 499,000 $ 1,283,000    
Weighted-average grant-date fair values, in dollars per share | $ / shares $ 18.68 $ 21.63     $ 18.59 $ 21.62
Total intrinsic value $ 14,220,000 $ 4,902,000     $ 36,799,000 $ 32,991,000
Total fair values of stock options vest 887,000 887,000     30,859,000 26,560,000
Unrecognized compensation expense 66,645,000       $ 66,645,000  
Weighted average period to be recognized         1 year 10 months 17 days  
Stock-based compensation expense 10,967,000 9,002,000     $ 23,248,000 22,196,000
Tax benefit from compensation expense 1,813,000 $ 1,607,000     4,035,000 $ 3,954,000
Recognized period costs capitalized $ 0       $ 0  
Employee Stock Option            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Shares available for grant under stock option plans | shares 17,363,952       17,363,952  
Expiration period from grant day         10 years  
Minimum | General Stock Option Plan            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Vesting period for stock option plans         4 years  
Maximum | General Stock Option Plan            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Vesting period for stock option plans         5 years