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STOCK-BASED COMPENSATION - Summary of Restricted Stock Unit Activity and Performance Stock Units (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands | 9 Months Ended |
--- | --- | ---
Sep. 30, 2023 | Dec. 31, 2022
Aggregate Intrinsic Value |  |
Share price (in usd per share) | $ 120.15 |
Restricted stock units |  |
Number of Shares Outstanding |  |
Outstanding, beginning balance (in shares) | 2,253 |
Granted (in shares) | 619 |
Vested (in shares) | (869) |
Canceled (in shares) | (195) |
Outstanding, ending balance (in shares) | 1,808 |
Number of shares outstanding, expected to vest (in shares) | 1,808 |
Weighted Average Fair Value per Share at Grant Date |  |
Outstanding, beginning balance (in usd per share) | $ 181.01 |
Granted (in usd per share) | 199.18 |
Vested (in usd per share) | 146.23 |
Canceled (in usd per share) | 181.59 |
Outstanding, ending balance (in usd per share) | 203.87 |
Weighted-Average Fair Value per Share at Grant Date, Expected to vest (in usd per share) | $ 203.87 |
Weighted-Average Remaining Contractual Term |  |
Outstanding | 1 year 2 months 12 days |
Expected to vest | 1 year 2 months 12 days |
Aggregate Intrinsic Value |  |
Outstanding | $ 217,335 |
Vested | 166,063 |
Aggregate intrinsic value, expected to vest | $ 217,327 |
Performance shares |  |
Number of Shares Outstanding |  |
Outstanding, beginning balance (in shares) | 376 |
Granted (in shares) | 420 |
Vested (in shares) | (380) |
Canceled (in shares) | (19) |
Outstanding, ending balance (in shares) | 397 |
Number of shares outstanding, expected to vest (in shares) | 397 |
Weighted Average Fair Value per Share at Grant Date |  |
Outstanding, beginning balance (in usd per share) | $ 197.82 |
Granted (in usd per share) | 234.34 |
Vested (in usd per share) | 196.24 |
Canceled (in usd per share) | 227.29 |
Outstanding, ending balance (in usd per share) | 236.51 |
Weighted-Average Fair Value per Share at Grant Date, Expected to vest (in usd per share) | $ 236.51 |
Weighted-Average Remaining Contractual Term |  |
Outstanding | 1 year 4 months 24 days |
Expected to vest | 1 year 4 months 24 days |
Aggregate Intrinsic Value |  |
Outstanding | $ 47,716 |
Vested | 80,113 |
Aggregate intrinsic value, expected to vest | $ 47,716 |

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