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Stock-Based Compensation Expense (Details) | 3 Months Ended | 9 Months Ended |
--- | --- | --- | ---
Sep. 27, 2020 USD ($) group $ / shares shares | Sep. 29, 2019 USD ($) $ / shares shares | Sep. 27, 2020 USD ($) group $ / shares shares | Sep. 29, 2019 USD ($) $ / shares shares | Dec. 31, 2019 USD ($)
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |
Weighted-average grant-date fair values, in dollars per share | $ / shares |  | $ 18.42 | $ 18.52 | $ 18.58 |
Total intrinsic value | $ 62,787,000 | $ 5,746,000 | $ 116,600,000 | $ 42,545,000 |
Total fair values of stock options vest | $ 1,331,000 | 1,213,000 | $ 39,282,000 | $ 32,072,000 |
Vested (in shares) | shares |  |  |  | 0 |
Groups within the employee population | group | 2 |  | 2 |  |
Estimated annual forfeiture rate for unvested options for senior management | 7.00% |  | 7.00% |  |
Estimated annual forfeiture rate for unvested options for all other employees | 12.00% |  | 12.00% |  |
Increase (decrease) to compensation expense |  |  | $ 1,787,000 | $ 499,000 |
Unrecognized compensation expense | $ 56,150,000 |  | $ 56,150,000 |  |
Weighted average period to be recognized |  |  | 1 year 9 months 18 days |  |
Stock-based compensation expense | 9,268,000 | 10,194,000 | $ 32,076,000 | 33,442,000 |
Tax benefit from compensation expense | 1,524,000 | $ 1,804,000 | 5,365,000 | $ 5,839,000 |
Recognized period costs capitalized | $ 0 |  | 0 |  | $ 0
Share-based Payment Arrangement, Noncash Expense |  |  | $ 1,401,000 |  |
Employee Stock Option |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |
Shares available for grant under stock option plans (in shares) | shares | 16,450,000 |  | 16,450,000 |  |
Expiration period from grant day |  |  | 10 years |  |
Performance Shares |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |
Vesting period for stock option plans |  |  | 3 years |  |
Restricted Stock Units (RSUs) |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |
Granted (in dollars per share) | $ / shares | $ 67.14 | $ 45.20 | $ 51.73 | $ 45.20 |
Vested (in shares) | shares | 0 | 0 | 0 | 0 |
Granted (in shares) | shares |  |  | 438,000 |  |
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 |  |

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