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SHARE-BASED COMPENSATION - Other Information Pertaining to Option Activity (Detail) - USD ($) $ / shares in Units, $ in Thousands | 12 Months Ended
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Dec. 31, 2020 | Dec. 31, 2019 | Dec. 31, 2018
Share-based Payment Arrangement [Abstract] |  |  |
Weighted average grant-date fair value of stock options granted (in dollars per share) | $ 98.69 | $ 74.54 | $ 66.52
Total intrinsic value of stock options exercised | $ 292,394 | $ 155,899 | $ 176,716

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