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STOCK-BASED COMPENSATION - Schedule of Option Activity (Details) - Options - USD ($) $ / shares in Units, $ in Thousands | 6 Months Ended
--- | ---
Jun. 30, 2024 | Jun. 30, 2023
Stock Awards Plans |  |
Assumptions used to estimate fair value of stock options granted |  |
Dividend yield assumption | 1.28% | 1.41%
Expected Stock Price Volatility | 17.03% | 16.55%
Risk-free interest rate | 4.51% | 3.57%
Expected Life of Option (years) | 7 years | 7 years
Stock options activity |  |
Outstanding at the beginning of the period (in shares) | 2,182,784 |
Granted (in shares) | 249,805 |
Exercised (in shares) | (377,602) |
Forfeited or expired (in shares) | (5,185) |
Outstanding at the end of the period (in shares) | 2,049,802 |
Stock option weighted average exercise price |  |
Outstanding at the beginning of the period (in dollars per share) | $ 80.63 |
Options granted, Weighted average exercise price (in dollars per share) | 141.00 |
Options exercised, Weighted average exercise price (in dollars per share) | 70.66 |
Options forfeited or expired, Weighted average exercise price (in dollars per share) | 93.42 |
Outstanding at the end of the period (in dollars per share) | $ 89.80 |
Share-based Compensation Arrangement by Share-based Payment Award, Options, Additional Disclosures [Abstract] |  |
Options exercisable, Number of options (in shares) | 1,593,918 |
Options exercisable, Weighted average exercise price (in dollars per share) | $ 78.35 |
Options outstanding, Weighted average remaining contractual term (in years) | 4 years 2 months 12 days |
Options exercisable, Weighted average remaining contractual term (in years) | 2 years 8 months 12 days |
Options outstanding, Aggregate intrinsic value | $ 110,862 |
Options exercisable, Aggregate intrinsic value | 104,452 |
Options exercised, Intrinsic value, at end of period | $ 25,454 | $ 16,886
Director Stock Option Plans |  |
Stock options activity |  |
Outstanding at the beginning of the period (in shares) | 19,000 |
Granted (in shares) | 0 |
Exercised (in shares) | (19,000) |
Forfeited or expired (in shares) | 0 |
Outstanding at the end of the period (in shares) | 0 |
Stock option weighted average exercise price |  |
Outstanding at the beginning of the period (in dollars per share) | $ 66.59 |
Options granted, Weighted average exercise price (in dollars per share) | 0 |
Options exercised, Weighted average exercise price (in dollars per share) | 66.59 |
Options forfeited or expired, Weighted average exercise price (in dollars per share) | 0 |
Outstanding at the end of the period (in dollars per share) | $ 0 |
Share-based Compensation Arrangement by Share-based Payment Award, Options, Additional Disclosures [Abstract] |  |
Options exercisable, Number of options (in shares) | 0 |
Options exercisable, Weighted average exercise price (in dollars per share) | $ 0 |
Options outstanding, Weighted average remaining contractual term (in years) | 0 years |
Options exercisable, Weighted average remaining contractual term (in years) | 0 years |
Options outstanding, Aggregate intrinsic value | $ 0 |
Options exercisable, Aggregate intrinsic value | 0 |
Options exercised, Intrinsic value, at end of period | $ 1,394 | $ 854

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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://www.xbrl.org/2003/role/disclosureRef -Topic 718 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (f)(2)(iii) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480429/718-10-50-2 + Details
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- Definition The estimated measure of the percentage by which a share price is expected to fluctuate during a period. Volatility also may be defined as a probability-weighted measure of the dispersion of returns about the mean. The volatility of a share price is the standard deviation of the continuously compounded rates of return on the share over a specified period. That is the same as the standard deviation of the differences in the natural logarithms of the stock prices plus dividends, if any, over the period. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 718 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (f)(2)(ii) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480429/718-10-50-2 + Details
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- Definition The risk-free interest rate assumption that is used in valuing an option on its own shares. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 718 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (f)(2)(iv) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480429/718-10-50-2 + Details
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- Definition The number of shares into which fully or partially vested stock options outstanding as of the balance sheet date can be currently converted under the option plan. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 718 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (c)(1)(iii) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480429/718-10-50-2 + Details
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- Definition For presentations that combine terminations, the number of shares under options that were cancelled during the reporting period as a result of occurrence of a terminating event specified in contractual agreements pertaining to the stock option plan or that expired. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 718 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (c)(1)(iv) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480429/718-10-50-2 + Details
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- Definition Expected term of award under share-based payment arrangement, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 718 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (f)(2)(i) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480429/718-10-50-2 + Details
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