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SHARE-BASED COMPENSATION - Schedule of Estimated Fair Value of Option Using Black-Scholes Option Pricing Model, Weighted Average Assumptions (Details) - $ / shares | 3 Months Ended
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Mar. 31, 2022 | Mar. 31, 2021
Stock Options |  |
Stock Options |  |
Risk-free interest rate | 1.60% | 0.70%
Expected term (in years) | 3 years 6 months | 4 years 3 months 18 days
Expected volatility (percent) | 35.00% | 34.00%
Weighted average fair value at grant date (usd per share) | $ 80.80 | $ 70.33
Employee Stock Purchase Program [Abstract] |  |
Risk-free interest rate | 1.60% | 0.70%
Expected term (in years) | 3 years 6 months | 4 years 3 months 18 days
Expected volatility (percent) | 35.00% | 34.00%
Weighted average fair value at grant date (usd per share) | $ 80.80 | $ 70.33
ESPP |  |
Stock Options |  |
Risk-free interest rate | 0.80% | 0.10%
Expected term (in years) | 1 year 2 months 12 days | 1 year 2 months 12 days
Expected volatility (percent) | 37.00% | 35.00%
Weighted average fair value at grant date (usd per share) | $ 88.85 | $ 74.39
Employee Stock Purchase Program [Abstract] |  |
Risk-free interest rate | 0.80% | 0.10%
Expected term (in years) | 1 year 2 months 12 days | 1 year 2 months 12 days
Expected volatility (percent) | 37.00% | 35.00%
Weighted average fair value at grant date (usd per share) | $ 88.85 | $ 74.39

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- Definition Stock Options + References No definition available. + 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 Rate of weighted-average expected volatility for award under share-based payment arrangement. + 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 weighted average grant-date fair value of options granted during the reporting period as calculated by applying the disclosed option pricing methodology. + 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)(1) -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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