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STOCK-BASED COMPENSATION (Tables) | 12 Months Ended
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Dec. 30, 2023
Share-based Payment Arrangement [Abstract] |
Schedule of Assumptions Used in Estimating Fair Value of Each Option Grant | The fair value of each option grant made as of December 30, 2023, December 31, 2022, and December 25, 2021 was estimated using the following assumptions: ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ |  | December 30, | ​ | December 31, | ​ | December 25,
​ | ​ | 2023 | ​ | 2022 | ​ | 2021
Expected volatility |  | 31.97 | % | ​ | 32.36 | % | ​ | 33.01 | %
Risk-free interest rate |  | 4.21 | % | ​ | 3.75 | % | ​ | 1.26 | %
Expected life from vesting date |  | 5.4 yrs |  | ​ | 5.4 yrs |  | ​ | 4.0 yrs | ​
Dividend yield |  | 0.87 | % | ​ | 1.10 | % | ​ | 1.20 | %
Summary of Activity of Stock Plans | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ |  | December 30, | ​ | December 31, | ​ | December 25,
​ | ​ | 2023 | ​ | 2022 | ​ | 2021
Expected volatility |  | 31.97 | % | ​ | 32.36 | % | ​ | 33.01 | %
Risk-free interest rate |  | 4.21 | % | ​ | 3.75 | % | ​ | 1.26 | %
Expected life from vesting date |  | 5.4 yrs |  | ​ | 5.4 yrs |  | ​ | 4.0 yrs | ​
Dividend yield |  | 0.87 | % | ​ | 1.10 | % | ​ | 1.20 | %
​ The following is a summary of the stock option activity during the fiscal years ended December 30, 2023, December 31, 2022, and December 25, 2021:
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | Weighted | ​ | ​ | ​
​ | ​ | ​ | ​ | Weighted | ​ | Average | ​ | ​ | ​
​ | ​ | ​ | ​ | Average | ​ | Remaining | ​ | Aggregate
​ | ​ | Number of | ​ | Exercise | ​ | Contractual | ​ | Intrinsic
​ |  | Shares |  | Price |  | Term |  | Value
Outstanding as of December 31, 2022 |  | 195,690 | ​ | $ | 214.62 |  |  |  | ​ |
Granted |  | 43,340 | ​ |  | 226.55 |  |  |  | ​ |
Exercised |  | (39,055) | ​ |  | 155.24 |  |  |  | ​ |
Forfeited |  | (18,445) | ​ |  | 307.81 |  |  |  | ​ |
Outstanding as of December 30, 2023 |  | 181,530 | ​ | $ | 220.77 |  | 7.99 | ​ | $ | 5,992
Options vested or expected to vest as of December 30, 2023 |  | 178,820 | ​ | $ | 220.31 |  | 7.96 | ​ |  | 5,975
Options exercisable as of December 30, 2023 |  | 116,545 | ​ | $ | 203.78 |  | 7.13 | ​ |  | 5,576
The weighted average per share fair value of options granted during the fiscal year ended December 31, 2023 was $72.60.
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | Weighted | ​ | ​ | ​
​ | ​ | ​ | ​ | Weighted | ​ | Average | ​ | ​ | ​
​ | ​ | ​ | ​ | Average | ​ | Remaining | ​ | Aggregate
​ | ​ | Number of | ​ | Exercise | ​ | Contractual | ​ | Intrinsic
​ |  | Shares |  | Price |  | Term |  | Value
Outstanding as of December 25, 2021 |  | 276,464 | ​ | $ | 164.48 |  |  |  | ​ |
Granted |  | 40,564 | ​ |  | 332.63 |  |  |  | ​ |
Exercised |  | (121,163) | ​ |  | 139.89 |  |  |  | ​ |
Forfeited |  | (175) | ​ |  | 104.47 |  |  |  | ​ |
Outstanding as of December 31, 2022 |  | 195,690 | ​ | $ | 214.62 |  | 7.53 | ​ | $ | 22,644
Options vested or expected to vest as of December 31, 2022 |  | 189,267 | ​ | $ | 212.69 |  | 7.48 | ​ |  | 22,261
Options exercisable as of December 31, 2022 |  | 90,556 | ​ | $ | 172.08 |  | 6.40 | ​ |  | 14,276
The weighted average per share fair value of options granted during the fiscal year ended December 31, 2022 was $104.01.
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | Weighted | ​ | ​ | ​
​ | ​ | ​ | ​ | Weighted | ​ | Average | ​ | ​ | ​
​ | ​ | ​ | ​ | Average | ​ | Remaining | ​ | Aggregate
​ | ​ | Number of | ​ | Exercise | ​ | Contractual | ​ | Intrinsic
​ |  | Shares |  | Price |  | Term |  | Value
Outstanding as of December 26, 2020 |  | 399,565 | ​ | $ | 141.79 |  |  |  | ​ |
Granted |  | 47,223 | ​ |  | 252.89 |  |  |  | ​ |
Exercised |  | (169,908) | ​ |  | 135.76 |  |  |  | ​ |
Forfeited |  | (416) | ​ |  | 132.84 |  |  |  | ​ |
Outstanding as of December 25, 2021 |  | 276,464 | ​ | $ | 164.48 |  | 5.88 | ​ | $ | 22,586
Options vested or expected to vest as of December 25, 2021 |  | 268,338 | ​ | $ | 163.42 |  | 5.80 | ​ |  | 22,188
Options exercisable as of December 25, 2021 |  | 154,860 | ​ | $ | 142.15 |  | 4.00 | ​ |  | 15,896
The weighted average per share fair value of options granted during the fiscal year ended December 25, 2021 was $67.81.
Schedule of Non-Vested Stock and Restricted Stock Units | During the fiscal years ended December 30, 2023, December 31, 2022, and December 25, 2021, the Company granted restricted stock units to directors and certain management employees as follows (which are not included in the above stock plan activity tables): ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ |  | Fiscal Year Ended
​ | ​ | December 30, | ​ | December 31, | ​ | December 25,
​ | ​ | 2023 |  | 2022 |  | 2021
Restricted stock units granted |  | ​ | 67,723 |  | ​ | 60,901 |  | ​ | 216,971
Weighted‑average per share price on grant date | ​ | $ | 233.96 | ​ | $ | 313.75 | ​ | $ | 236.28
Recognized compensation expense | ​ | $ | 22,478 | ​ | $ | 22,664 | ​ | $ | 16,147
Share-based Payment Arrangement, Performance Shares, Outstanding Activity | During the fiscal years ended December 30, 2023, December 31, 2022, and December 25, 2021, the Company granted PSU awards as follows (which are not included in the above stock plan activity tables):
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ |  | Fiscal Year Ended
​ | ​ | December 30, | ​ | December 31, | ​ | December 25,
​ | ​ | 2023 |  | 2022 |  | 2021
Shares granted |  | ​ | 38,201 |  | ​ | 33,736 |  | ​ | 41,060
Weighted‑average per share price on grant date | ​ | $ | 299.20 | ​ | $ | 215.15 | ​ | $ | 230.40
Recognized compensation expense | ​ | $ | 13,054 | ​ | $ | 16,066 | ​ | $ | 10,035

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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 -Topic 718 -SubTopic 10 -Subparagraph (f)(2) -Name Accounting Standards Codification -Paragraph 2 -Section 50 -Publisher FASB -URI https://asc.fasb.org//1943274/2147480429/718-10-50-2 + Details
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