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Common Stock and Share-Based Compensation (Tables) | 12 Months Ended
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Dec. 31, 2022
Share-Based Payment Arrangement [Abstract] |
Summary of Stock Options under Equity Plan and Non-Employee Director Plan | Information related to stock options under the Equity Plan and the Non-Employee Director Plan is summarized as follows:
|  | Shares |  |  | Weighted- Average Exercise Price |  |  | Weighted- Average Remaining Contractual Term in Years |  |  | Aggregate Intrinsic Value (in thousands) |
Outstanding at December 25, 2021 |  |  | 221,354 |  |  | $ | 310.38 |  |  |  |  |  |  |
Granted |  |  | 20,924 |  |  |  | 378.55 |  |  |  |  |  |  |
Exercised |  |  | (30,164 | ) |  |  | 188.46 |  |  |  |  |  |  |
Cancelled/Forfeited |  |  | (7,869 | ) |  |  | 339.25 |  |  |  |  |  |  |
Outstanding at December 31, 2022 |  |  | 204,245 |  |  | $ | 334.26 |  |  |  | 5.25 |  |  | $ | 15,378 |
Exercisable at December 31, 2022 |  |  | 118,829 |  |  | $ | 251.08 |  |  |  | 4.46 |  |  | $ | 11,561 |
Vested and expected to vest at December 31, 2022 |  |  | 174,154 |  |  | $ | 319.56 |  |  |  | 4.83 |  |  | $ | 14,653 |
Stock-Based Compensation Expense Included in Operating Expenses | The following table provides information regarding stock-based compensation expense included in operating expenses in the accompanying consolidated statements of comprehensive income:
|  | 2022 |  |  | 2021 |  |  | 2020 |
|  | (in thousands) |
Amounts included in advertising, promotional, and selling expenses |  | $ | 5,184 |  |  | $ | 5,612 |  |  | $ | 4,467 |
Amounts included in general and administrative expenses |  |  | 8,804 |  |  |  | 13,003 |  |  |  | 10,815 |
Total stock-based compensation expense |  | $ | 13,988 |  |  | $ | 18,615 |  |  | $ | 15,282 |
Amounts related to performance-based stock awards included in total stock-based compensation expense |  | $ | 1,524 |  |  | $ | 3,384 |  |  | $ | 2,771 |
Weighted Average Assumptions used to Estimate Fair Value of Stock Options | Weighted average assumptions used to estimate fair values of stock options on the date of grants are as follows:
|  | 2022 |  |  | 2021 |  |  | 2020 |
Expected volatility |  |  | 38.0 | % |  |  | 36.1 | % |  |  | 32.6 | %
Risk-free interest rate |  |  | 2.11 | % |  |  | 1.45 | % |  |  | 1.09 | %
Expected dividends |  |  | 0 | % |  |  | 0 | % |  |  | 0 | %
Exercise factor |  | 3.0 times |  |  | 2.6 times |  |  | 2.1 times |
Discount for post-vesting restrictions |  |  | 0.0 | % |  |  | 0.0 | % |  |  | 0.0 | %
Summary of Vesting Activities of Shares Issued Under Investment Share Program and Restricted Stock Awards | The following table summarizes vesting activities of shares issued under the investment share program and restricted stock awards:
|  | Number of Shares |  |  | Weighted Average Fair Value |
Non-vested at December 25, 2021 |  |  | 88,848 |  |  | $ | 401.70 |
Granted |  |  | 43,589 |  |  |  | 346.09 |
Vested |  |  | (32,476 | ) |  |  | 292.27 |
Forfeited |  |  | (8,750 | ) |  |  | 504.81 |
Non-vested at December 31, 2022 |  |  | 91,211 |  |  | $ | 423.60 |

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- Definition Tabular disclosure of activity for award under share-based payment arrangement. Includes, but is not limited to, outstanding award at beginning and end of year, granted, exercised, forfeited, and weighted-average grant date fair value. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (e) -URI https://asc.fasb.org/extlink&oid=128089324&loc=d3e5070-113901 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(2) -URI https://asc.fasb.org/extlink&oid=128089324&loc=d3e5070-113901 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (d) -URI https://asc.fasb.org/extlink&oid=128089324&loc=d3e5070-113901 + Details
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- Definition Tabular disclosure of the significant assumptions used during the year to estimate the fair value of stock options, including, but not limited to: (a) expected term of share options and similar instruments, (b) expected volatility of the entity's shares, (c) expected dividends, (d) risk-free rate(s), and (e) discount for post-vesting restrictions. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (f)(2) -URI https://asc.fasb.org/extlink&oid=128089324&loc=d3e5070-113901 + Details
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