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Stock-Based Compensation Expense (Details) - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 26, 2020 | Sep. 28, 2019 | Sep. 26, 2020 | Sep. 28, 2019
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |
Total stock based compensation expense | $ 8,470 | $ 4,146 | $ 15,554 | $ 12,034
Income tax benefit | 2,081 | 984 | 3,795 | 2,948
Total stock-based compensation expense, net of tax | 6,389 | 3,162 | 11,759 | 9,086
Stock awards |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |
Total stock based compensation expense | 7,930 | 3,527 | 13,776 | 10,256
Stock options |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |
Total stock based compensation expense | $ 540 | $ 619 | $ 1,778 | $ 1,778

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