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Capital Stock (Tables) | 12 Months Ended
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Dec. 26, 2020
Schedule of Weighted Average Valuation Assumptions Used to Calculate Fair Value Granted | The following table summarizes the weighted average valuation assumptions used to calculate the fair value of options granted and the associated weighted-average grant-date fair values:
|  | For the Years Ended |
|  | December 26, 2020 |  |  | December 28, 2019 |  |  | December 29, 2018 |
Expected dividend yield |  |  | 0 | % |  |  | 0 | % |  |  | 0 | %
Expected stock price volatility |  |  | 29 | % |  |  | 28 | % |  |  | 27 | %
Risk-free interest rate |  |  | 0.8 | % |  |  | 2.3 | % |  |  | 2.6 | %
Expected life of options |  |  | 5.3 |  |  | 5.4 years |  |  | 3.0 years |
Weighted-average grant-date fair value |  | $ | 17.84 |  |  | $ | 24.32 |  |  | $ | 15.88 |
Summary of Restricted Stock Awards and Restricted Stock Unit Activity | The following table summarizes our restricted stock awards and restricted stock unit activity for the three years ended December 26, 2020:
|  | Shares |  |  | Weighted Average Price |
Balance at December 30, 2017 |  |  | 153,727 |  |  | $ | 59.94 |
Granted |  |  | 89,798 |  |  | $ | 73.51 |
Vested |  |  | (45,707 | ) |  | $ | 62.56 |
Cancelled |  |  | (27,081 | ) |  | $ | 75.39 |
Balance at December 29, 2018 |  |  | 170,737 |  |  | $ | 63.94 |
Granted |  |  | 92,396 |  |  | $ | 81.92 |
Vested |  |  | (41,586 | ) |  | $ | 55.72 |
Cancelled |  |  | (44,056 | ) |  | $ | 58.03 |
Balance at December 28, 2019 |  |  | 177,491 |  |  | $ | 76.70 |
Granted |  |  | 83,875 |  |  | $ | 64.66 |
Vested |  |  | (27,477 | ) |  | $ | 71.25 |
Cancelled |  |  | (16,154 | ) |  | $ | 76.44 |
Balance at December 26, 2020 |  |  | 217,735 |  |  | $ | 72.77 |
Summary of Stock Option Activity | The following table summarizes our stock option activity for the three years ended December 26, 2020:
|  | Shares |  |  | Option Price per Share |  |  | Weighted Average Price |  |  | Weighted Average Remaining Terms (years) |  |  | Aggregate Intrinsic Value |
Balance at December 30, 2017 |  |  | 122,547 |  |  | $5.67 – $82.59 |  |  | $ | 57.74 |  |  |  |  |  |  |  |  |
Granted |  |  | 81,995 |  |  | $68.93 – $82.94 |  |  | $ | 73.84 |  |  |  |  |  |  |  |  |
Exercised |  |  | (15,113 | ) |  | $5.67 – $78.64 |  |  | $ | 39.38 |  |  |  |  |  |  |  |  |
Cancelled |  |  | (960 | ) |  |  | $72.55 |  |  | $ | 72.55 |  |  |  |  |  |  |  |  |
Balance at December 29, 2018 |  |  | 188,469 |  |  | $7.74 – $82.94 |  |  | $ | 66.14 |  |  |  |  |  |  |  |  |
Granted |  |  | 44,025 |  |  | $73.72 – $84.93 |  |  | $ | 81.84 |  |  |  |  |  |  |  |  |
Exercised |  |  | (38,009 | ) |  | $7.74 – $78.76 |  |  | $ | 58.96 |  |  |  |  |  |  |  |  |
Cancelled |  |  | (12,773 | ) |  | $41.59 – $82.94 |  |  | $ | 75.52 |  |  |  |  |  |  |  |  |
Balance at December 28, 2019 |  |  | 181,712 |  |  | $41.59 – $82.94 |  |  | $ | 70.78 |  |  |  |  |  |  |  |  |
Granted |  |  | 109,352 |  |  | $61.68 – $83.06 |  |  | $ | 63.25 |  |  |  |  |  |  |  |  |
Exercised |  |  | (31,521 | ) |  | $41.59 – $82.94 |  |  | $ | 50.77 |  |  |  |  |  |  |  |  |
Cancelled |  |  | (8,764 | ) |  | $61.68 – $74.21 |  |  | $ | 65.24 |  |  |  |  |  |  |  |  |
Balance at December 26, 2020 |  |  | 250,779 |  |  | $41.59 – $84.93 |  |  | $ | 70.21 |  |  |  | 4.9 |  |  | $ | 4,847,742 |
Options exercisable at December 26, 2020 |  |  | 78,066 |  |  | $41.59 – $84.93 |  |  | $ | 72.06 |  |  |  | 2.5 |  |  | $ | 1,366,281 |
Summary of Shares Repurchase and Cancellation | The following table summarizes the repurchase and cancellation of common stock:
|  | For the Years Ended |
|  | December 26, 2020 |  |  | December 28, 2019 |  |  | December 29, 2018 |
Shares repurchased and cancelled |  |  | 23,360 |  |  |  | 22,380 |  |  |  | 26,280 |
Total cost of shares repurchased and cancelled (in millions) |  | $ | 1.9 |  |  | $ | 1.9 |  |  | $ | 2.0 |
Average price per share |  | $ | 81.12 |  |  | $ | 87.26 |  |  | $ | 74.79 |
The following table summarizes the repurchase and cancellation of common stock:
|  | For the Years Ended |
|  | December 26, 2020 |  |  | December 28, 2019 |  |  | December 29, 2018 |
Shares repurchased and cancelled |  |  | 439,275 |  |  |  | 499,564 |  |  |  | 622,223 |
Total cost of shares repurchased and cancelled (in millions) |  | $ | 36.8 |  |  | $ | 39.4 |  |  | $ | 43.4 |
Average price per share |  | $ | 83.73 |  |  | $ | 78.84 |  |  | $ | 69.73 |
Performance Restricted Stock [Member] |
Schedule of Weighted Average Valuation Assumptions Used to Calculate Fair Value Granted | The following table summarizes the weighted average valuation assumptions used to calculate the fair value of total shareholder return performance-based restricted stock awards and performance-based restricted stock units granted:
|  | For the Years Ended |
|  | December 26, 2020 |  |  | December 28, 2019 |
Share price |  | $ | 61.68 |  |  | $ | 82.03 |
Expected dividend yield |  |  | 0.0 | % |  |  | 0.0 | %
Expected stock price volatility |  |  | 31.5 | % |  |  | 27.7 | %
Risk-free interest rate |  |  | 0.9 | % |  |  | 2.5 | %
Expected life |  | 2.8 years |  |  | 2.8 years |

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