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Goodwill and Other Intangible Assets, Net - Components of Other Intangible Assets (Detail) - USD ($) $ in Thousands | 9 Months Ended | 12 Months Ended
--- | --- | ---
Sep. 30, 2021 | Dec. 31, 2020
Schedule Of Acquired Finite And Indefinite Lived Intangible Asset By Major Class [Line Items] |  |
Total gross definite life intangible assets | $ 254,080 | $ 347,163
Accumulated Amortization | 123,988 | 141,984
Net definite life intangible assets | $ 130,092 | $ 205,179
Weighted-Average Remaining Life | 10 years 1 month 6 days | 9 years 10 months 24 days
Total indefinite life intangible assets | $ 81,956 | $ 81,978
Total definite and indefinite life intangible assets, gross, excluding goodwill | 336,036 | 429,141
Total definite and indefinite life intangible assets, net, excluding goodwill | 212,048 | 287,157
Disposal Group, Held-for-sale, Not Discontinued Operations |  |
Schedule Of Acquired Finite And Indefinite Lived Intangible Asset By Major Class [Line Items] |  |
Total definite and indefinite life intangible assets, gross, excluding goodwill | 91,600 |
Total definite and indefinite life intangible assets, net, excluding goodwill | 55,600 |
Trade names |  |
Schedule Of Acquired Finite And Indefinite Lived Intangible Asset By Major Class [Line Items] |  |
Total indefinite life intangible assets | 79,570 | 79,570
Licenses |  |
Schedule Of Acquired Finite And Indefinite Lived Intangible Asset By Major Class [Line Items] |  |
Total indefinite life intangible assets | 2,386 | 2,408
Customer-related |  |
Schedule Of Acquired Finite And Indefinite Lived Intangible Asset By Major Class [Line Items] |  |
Total gross definite life intangible assets | 182,531 | 252,241
Accumulated Amortization | 67,057 | 77,106
Net definite life intangible assets | $ 115,474 | $ 175,135
Weighted-Average Remaining Life | 10 years 3 months 18 days | 10 years 4 months 24 days
Technology |  |
Schedule Of Acquired Finite And Indefinite Lived Intangible Asset By Major Class [Line Items] |  |
Total gross definite life intangible assets | $ 23,997 | $ 24,025
Accumulated Amortization | 22,571 | 20,031
Net definite life intangible assets | $ 1,426 | $ 3,994
Weighted-Average Remaining Life | 4 months 24 days | 1 year 2 months 12 days
Noncompete agreements |  |
Schedule Of Acquired Finite And Indefinite Lived Intangible Asset By Major Class [Line Items] |  |
Total gross definite life intangible assets | $ 19,821 | $ 30,715
Accumulated Amortization | 18,844 | 29,596
Net definite life intangible assets | $ 977 | $ 1,119
Weighted-Average Remaining Life | 5 years 2 months 12 days | 5 years 10 months 24 days
Patents |  |
Schedule Of Acquired Finite And Indefinite Lived Intangible Asset By Major Class [Line Items] |  |
Total gross definite life intangible assets | $ 10,616 | $ 10,616
Accumulated Amortization | 10,237 | 10,223
Net definite life intangible assets | $ 379 | $ 393
Weighted-Average Remaining Life | 1 year 6 months | 1 year 7 months 6 days
All other |  |
Schedule Of Acquired Finite And Indefinite Lived Intangible Asset By Major Class [Line Items] |  |
Total gross definite life intangible assets | $ 17,115 | $ 29,566
Accumulated Amortization | 5,279 | 5,028
Net definite life intangible assets | $ 11,836 | $ 24,538
Weighted-Average Remaining Life | 9 years 6 months | 8 years 3 months 18 days

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