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STOCK-BASED COMPENSATION (Tables) | 12 Months Ended
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Dec. 31, 2022
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 in 2022, 2021 and 2020 was estimated using the following assumptions: ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ |  | 2022 | ​ | 2021 | ​ | 2020
Expected volatility |  | 32.36 | % | ​ | 33.01 | % | ​ | 33.72 | %
Risk-free interest rate |  | 3.75 | % | ​ | 1.26 | % | ​ | 0.43 | %
Expected life from vesting date |  | 5.4 yrs |  | ​ | 4.0 yrs |  | ​ | 4.0 yrs | ​
Dividend yield |  | 1.10 | % | ​ | 1.20 | % | ​ | 1.24 | %
​
Summary of Activity of Stock Plans | Following is a summary of the stock option activity during 2020, 2021 and 2022:
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | Weighted | ​ | ​ | ​
​ | ​ | ​ | ​ | Weighted | ​ | Average | ​ | ​ | ​
​ | ​ | ​ | ​ | Average | ​ | Remaining | ​ | Aggregate
​ | ​ | Number of | ​ | Exercise | ​ | Contractual | ​ | Intrinsic
​ |  | Shares |  | Price |  | Term |  | Value
Outstanding at December 28, 2019 |  | 488,560 | ​ | $ | 133.13 |  |  |  | ​ |
Granted |  | 66,231 | ​ |  | 168.80 |  |  |  | ​ |
Exercised |  | (147,014) | ​ |  | 125.43 |  |  |  | ​ |
Forfeited |  | (8,212) | ​ |  | 137.49 |  |  |  | ​ |
Outstanding at December 26, 2020 |  | 399,565 | ​ | $ | 141.79 |  | 4.88 | ​ | $ | 12,103
Options vested or expected to vest at December 26, 2020 |  | 389,633 | ​ | $ | 141.56 |  | 4.81 | ​ |  | 11,890
Options exercisable at December 26, 2020 |  | 254,498 | ​ | $ | 138.64 |  | 3.38 | ​ |  | 8,510
​ The weighted average per share fair value of options granted during 2020 was $45.49.
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | Weighted | ​ | ​ | ​
​ | ​ | ​ | ​ | Weighted | ​ | Average | ​ | ​ | ​
​ | ​ | ​ | ​ | Average | ​ | Remaining | ​ | Aggregate
​ | ​ | Number of | ​ | Exercise | ​ | Contractual | ​ | Intrinsic
​ |  | Shares |  | Price |  | Term |  | Value
Outstanding at December 26, 2020 |  | 399,565 | ​ | $ | 141.79 |  |  |  | ​ |
Granted |  | 47,223 | ​ |  | 252.89 |  |  |  | ​ |
Exercised |  | (169,908) | ​ |  | 135.76 |  |  |  | ​ |
Forfeited |  | (416) | ​ |  | 132.84 |  |  |  | ​ |
Outstanding at December 25, 2021 |  | 276,464 | ​ | $ | 164.48 |  | 5.88 | ​ | $ | 22,586
Options vested or expected to vest at December 25, 2021 |  | 268,338 | ​ | $ | 163.42 |  | 5.80 | ​ |  | 22,188
Options exercisable at December 25, 2021 |  | 154,860 | ​ | $ | 142.15 |  | 4.00 | ​ |  | 15,896
​ The weighted average per share fair value of options granted during 2021 was $67.81. ​ (12) STOCK-BASED COMPENSATION – CONTINUED
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | Weighted | ​ | ​ | ​
​ | ​ | ​ | ​ | Weighted | ​ | Average | ​ | ​ | ​
​ | ​ | ​ | ​ | Average | ​ | Remaining | ​ | Aggregate
​ | ​ | Number of | ​ | Exercise | ​ | Contractual | ​ | Intrinsic
​ |  | Shares |  | Price |  | Term |  | Value
Outstanding at December 25, 2021 |  | 276,464 | ​ | $ | 164.48 |  |  |  | ​ |
Granted |  | 40,564 | ​ |  | 332.63 |  |  |  | ​ |
Exercised |  | (121,163) | ​ |  | 139.89 |  |  |  | ​ |
Forfeited |  | (175) | ​ |  | 104.47 |  |  |  | ​ |
Outstanding at December 31, 2022 |  | 195,690 | ​ | $ | 214.62 |  | 7.53 | ​ | $ | 22,644
Options vested or expected to vest at December 31, 2022 |  | 189,267 | ​ | $ | 212.69 |  | 7.48 | ​ |  | 22,261
Options exercisable at December 31, 2022 |  | 90,556 | ​ | $ | 172.08 |  | 6.40 | ​ |  | 14,276
​ The weighted average per share fair value of options granted during 2022 was $104.01.
Schedule of Non-Vested Stock and Restricted Stock Units | During fiscal 2022, 2021 and 2020, 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): ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ |  | 2022 |  | 2021 |  | 2020
Restricted stock units granted |  | ​ | 60,901 |  | ​ | 216,971 |  | ​ | 85,251
Weighted‑average per share price on grant date | ​ | $ | 313.75 | ​ | $ | 236.28 | ​ | $ | 161.73
Recognized compensation expense | ​ | $ | 22,664 | ​ | $ | 16,147 | ​ | $ | 9,081
​
Share-based Payment Arrangement, Performance Shares, Outstanding Activity | During fiscal 2022, 2021 and 2020, the Company granted PSU awards as follows (which are not included in the above stock plan activity tables):
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ |  | 2022 |  | 2021 |  | 2020
Shares granted |  | ​ | 33,736 |  | ​ | 41,060 |  | ​ | 35,181
Weighted‑average per share price on grant date | ​ | $ | 215.15 | ​ | $ | 230.40 | ​ | $ | 125.41
Recognized compensation expense | ​ | $ | 16,066 | ​ | $ | 10,035 | ​ | $ | 3,165
​

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- Definition Tabular disclosure for stock option plans. Includes, but is not limited to, outstanding awards at beginning and end of year, grants, exercises, forfeitures, 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 (d) -URI http://asc.fasb.org/extlink&oid=120381028&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 (e) -URI http://asc.fasb.org/extlink&oid=120381028&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 (c)(1) -URI http://asc.fasb.org/extlink&oid=120381028&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 http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901 + Details
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- Definition Tabular disclosure of the number and weighted-average grant date fair value for outstanding performance shares. + 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 (c) -URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901 + Details
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