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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