Goodwill and Intangible Assets - Goodwill and Intangible Assets (Detail) - USD ($) $ in Thousands	Sep. 30, 2022	Dec. 31, 2021
Schedule Of Goodwill And Intangible Assets [Line Items]
Gross Carrying Amount	$ 654,208	$ 646,928
Accumulated Amortization	(560,953)	(549,238)
Intangible Assets, Net	93,255	97,690
Registered trademarks	52,000	52,000
Goodwill	523,927	506,607
Total	575,927	558,607
Proprietary Technology [Member]
Schedule Of Goodwill And Intangible Assets [Line Items]
Gross Carrying Amount	252,083	249,483
Accumulated Amortization	(232,475)	(227,408)
Intangible Assets, Net	19,608	22,075
Customer Contracts and Relationships [Member]
Schedule Of Goodwill And Intangible Assets [Line Items]
Gross Carrying Amount	402,125	397,445
Accumulated Amortization	(328,478)	(321,830)
Intangible Assets, Net	$ 73,647	$ 75,615