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STOCK-BASED COMPENSATION (Details) - USD ($) $ / shares in Units, $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2022 | Dec. 25, 2021 | Dec. 26, 2020
Stock Based Compensation |  |  |
Shares of common stock available for issuance | 1,722,643 |  |
Number of Shares |  |  |
Exercised (in shares) | (121,163) | (169,908) | (147,014)
Share-based Payment Arrangement, Option |  |  |
Stock Based Compensation |  |  |
Compensation expense | $ 3,120 | $ 2,538 | $ 2,628
Tax benefits associated with compensation expense | $ 10,463 | $ 7,180 | $ 3,719
Weighted average period over which unrecognized stock option compensation cost would be recognized | 2 years 4 months 13 days |  |
Unrecognized stock option compensation expense | $ 6,814 |  |
Assumptions used in estimating fair value of each option grant |  |  |
Expected volatility | 32.36% | 33.01% | 33.72%
Risk-free interest rate | 3.75% | 1.26% | 0.43%
Expected life from vesting date | 5 years 4 months 24 days | 4 years | 4 years
Dividend yield | 1.10% | 1.20% | 1.24%
Number of Shares |  |  |
Balance at the beginning of the period (in shares) | 276,464 | 399,565 | 488,560
Granted (in shares) | 40,564 | 47,223 | 66,231
Exercised (in shares) | (121,163) | (169,908) | (147,014)
Forfeited (in shares) | (175) | (416) | (8,212)
Balance at the end of the period (in shares) | 195,690 | 276,464 | 399,565
Options vested or expected to vest (in shares) | 189,267 | 268,338 | 389,633
Options exercisable (in shares) | 90,556 | 154,860 | 254,498
Weighted Average Exercise Price |  |  |
Balance at the beginning of the period (in dollars per share) | $ 164.48 | $ 141.79 | $ 133.13
Granted (in dollars per share) | 332.63 | 252.89 | 168.80
Exercised (in dollars per share) | 139.89 | 135.76 | 125.43
Forfeited (in dollars per share) | 104.47 | 132.84 | 137.49
Balance at the end of the period (in dollars per share) | 214.62 | 164.48 | 141.79
Options vested or expected to vest (in dollars per share) | 212.69 | 163.42 | 141.56
Options exercisable (in dollars per share) | $ 172.08 | $ 142.15 | $ 138.64
Weighted Average Remaining Contractual Term |  |  |
Options outstanding | 7 years 6 months 10 days | 5 years 10 months 17 days | 4 years 10 months 17 days
Options vested or expected to vest | 7 years 5 months 23 days | 5 years 9 months 18 days | 4 years 9 months 21 days
Options exercisable | 6 years 4 months 24 days | 4 years | 3 years 4 months 17 days
Aggregate Intrinsic Value |  |  |
Options outstanding | $ 22,644 | $ 22,586 | $ 12,103
Options vested or expected to vest | 22,261 | 22,188 | 11,890
Options exercisable | $ 14,276 | $ 15,896 | $ 8,510
Other option disclosures |  |  |
Weighted average per share fair value of option granted | $ 104.01 | $ 67.81 | $ 45.49
Share-based Payment Arrangement, Option | Maximum |  |  |
Stock Based Compensation |  |  |
Expiration period of grant | 10 years |  |
Share-based Payment Arrangement, Option | Minimum |  |  |
Stock Based Compensation |  |  |
Vesting period of options | 3 years |  |
Expiration period of grant | 7 years |  |
Restricted Stock and Awards |  |  |
Stock Based Compensation |  |  |
Compensation expense | $ 41,850 | $ 28,720 | $ 14,874
Assumptions used in estimating fair value of each option grant |  |  |
Expected life from vesting date | 3 years |  |

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- Definition The estimated dividend rate (a percentage of the share price) to be paid (expected dividends) to holders of the underlying shares over the option's term. + 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)(iii) -URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901 + Details
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