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Stock-Based Compensation Expense (Detail) | 3 Months Ended | 9 Months Ended
--- | --- | ---
Oct. 01, 2017 USD ($) group $ / shares shares | Apr. 02, 2017 USD ($) | Oct. 02, 2016 USD ($) $ / shares | Apr. 03, 2016 USD ($) | Oct. 01, 2017 USD ($) group $ / shares shares | Oct. 02, 2016 USD ($) $ / shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |
Expected dividend yield | 0.39% |  | 0.84% |  | 0.39% | 0.84%
Groups within the employee population | group | 2 |  |  |  | 2 |
Percentage of stock options granted to senior management expected to vest | 75.00% |  |  |  | 75.00% |
Percentage of stock options granted to all other employees expected to vest | 72.00% |  |  |  | 72.00% |
Estimated annual forfeiture rate for unvested options for senior management | 10.00% |  |  |  | 10.00% |
Estimated annual forfeiture rate for unvested options for all other employees | 12.00% |  |  |  | 12.00% |
Increase (decrease) to compensation expense |  | $ 673,000 |  | $ 334,000 |  |
Weighted-average grant-date fair values, in dollars per share | $ / shares | $ 29.59 |  | $ 12.34 |  | $ 29.94 | $ 12.25
Total intrinsic value | $ 28,462,000 |  | $ 23,139,000 |  | $ 100,913,000 | $ 32,514,000
Total fair values of stock options vest | 844,000 |  | 679,000 |  | 19,557,000 | 16,724,000
Unrecognized compensation expense | 41,354,000 |  |  |  | $ 41,354,000 |
Weighted average period to be recognized |  |  |  |  | 1 year 8 months 1 day |
Stock-based compensation expense | 8,026,000 |  | 4,622,000 |  | $ 23,355,000 | 15,883,000
Tax benefit from compensation expense | 2,639,000 |  | $ 1,520,000 |  | 7,661,000 | $ 5,210,000
Recognized period costs capitalized | $ 0 |  |  |  | $ 0 |
Vesting period, performance-based restricted stock, years |  |  |  |  | 1 year |
Vesting period, time-based restricted stock, years |  |  |  |  | 3 years |
General Stock Option Plan |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |
Vesting period for stock option plans |  |  |  |  | 4 years |
Employee Stock Option |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |
Shares available for grant under stock option plans | shares | 6,183,376 |  |  |  | 6,183,376 |
Expiration period from grant day |  |  |  |  | 10 years |

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