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EMPLOYEE BENEFIT AND DEFERRED COMPENSATION PLANS - ESPP - Option-pricing model key input assumptions (Details) - $ / shares |  |  |  |  |  |  | 3 Months Ended | 9 Months Ended
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May 31, 2023 | Nov. 30, 2022 | May 31, 2022 | Nov. 30, 2021 | May 31, 2021 | Jul. 28, 2020 | Dec. 31, 2021 | Sep. 30, 2021 | Jun. 30, 2021 | Mar. 31, 2021 | Sep. 30, 2022
Fair Value Assumptions and Methodology |  |  |  |  |  |  |  |  |  |  |
Fair market value of common stock |  |  |  |  |  |  | $ 18.47 | $ 19.00 | $ 17.66 | $ 32.16 | $ 18.96
Volatility |  |  |  |  |  | 36.70% | 37.40% | 37.10% | 36.80% | 36.80% | 37.10%
Expected term (in years) |  |  |  |  |  | 6 years 6 months | 5 years | 5 years | 6 years | 6 years | 5 years
Risk-free interest rate |  |  |  |  |  | 0.40% | 1.30% | 0.90% | 0.40% | 0.40% | 0.80%
Initial Public Offering | ESPP |  |  |  |  |  |  |  |  |  |  |
Fair Value Assumptions and Methodology |  |  |  |  |  |  |  |  |  |  |
Fair market value of common stock | $ 17.21 | $ 11.16 | $ 17.38 | $ 19.89 | $ 25.83 |  |  |  |  |  |
Volatility | 46.40% | 35.40% | 37.30% | 35.10% | 35.10% |  |  |  |  |  |
Expected term (in years) | 6 months | 6 months | 6 months | 6 months | 6 months |  |  |  |  |  |
Risk-free interest rate | 4.70% | 1.60% | 0.10% | 0.10% | 0.10% |  |  |  |  |  |

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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://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (f)(2)(ii) -URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901 + 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://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (f)(2)(iv) -URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901 + 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://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (f)(2)(i) -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 S99 -Paragraph 1 -Subparagraph (SAB Topic 14.D.2) -URI http://asc.fasb.org/extlink&oid=122041274&loc=d3e301413-122809 + Details
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