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GOODWILL AND OTHER INTANGIBLE ASSETS, NET - Components of Other Intangible Assets (Detail) - USD ($) $ in Thousands | Dec. 31, 2020 | Dec. 31, 2019
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Intangible Assets by Major Class [Line Items] |  |
Definite-lived intangibles, gross amount | $ 783,754 | $ 461,489
Intangibles, gross amount | 815,894 | 493,629
Definite-lived intangibles, accumulated amortization | (178,686) | (139,014)
Trade names |  |
Intangible Assets by Major Class [Line Items] |  |
Indefinite-lived intangibles, gross amount | 32,140 | 32,140
Customer relationships |  |
Intangible Assets by Major Class [Line Items] |  |
Definite-lived intangibles, gross amount | 711,065 | 422,042
Definite-lived intangibles, accumulated amortization | (147,014) | (116,575)
Other |  |
Intangible Assets by Major Class [Line Items] |  |
Definite-lived intangibles, gross amount | 72,689 | 39,447
Definite-lived intangibles, accumulated amortization | $ (31,672) | $ (22,439)

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