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Stock-Based Compensation Expense (Detail) | 3 Months Ended | 9 Months Ended
--- | --- | ---
Oct. 04, 2015 USD ($) group $ / shares shares | Sep. 28, 2014 USD ($) $ / shares | Oct. 04, 2015 USD ($) group $ / shares shares | Sep. 28, 2014 USD ($) $ / shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |
Expected dividend yield | 1.25% | 0.00% | 1.25% | 0.00%
Groups within the employee population | group | 2 |  | 2 |
Percentage of stock options granted to senior management | 74.00% |  | 74.00% |
Percentage of stock options granted to all other employees | 73.00% |  | 73.00% |
Estimated annual forfeiture rate | 10.00% |  | 10.00% |
Estimated annual forfeiture rate for unvested options | 11.00% |  | 11.00% |
Increase (decrease) to compensation expense | $ 461,000 | $ 288,000 |  |
Weighted-average grant-date fair values, in dollars per share | $ / shares | $ 14.36 | $ 15.45 | $ 14.35 | $ 15.35
Total intrinsic value | $ 4,506,000 | $ 14,461,000 | $ 43,737,000 | $ 29,104,000
Total fair values of stock options vest | 565,000 | 268,000 | 14,984,000 | 11,251,000
Unrecognized compensation expense | 22,169,000 |  | $ 22,169,000 |
Weighted average period to be recognized |  |  | 1 year 8 months 16 days |
Stock-based compensation expense | 5,493,000 | 3,298,000 | $ 17,070,000 | 11,258,000
Tax benefit from compensation expense | 1,865,000 | $ 1,098,000 | 5,734,000 | $ 3,670,000
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 | 7,817,714 |  | 7,817,714 |
Expiration period from grant day |  |  | 10 years |
Discontinued Operations, Disposed of by Sale |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |
Accelerated vesting of stock options, shares | shares | 190,000 |  | 190,000 |
Stock-based compensation expense | $ 1,106,000 |  |  |

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