Goodwill and Intangible Assets - Goodwill and Intangible Assets (Detail) - USD ($) $ in Thousands	Jun. 30, 2022	Dec. 31, 2021
Schedule Of Goodwill And Intangible Assets [Line Items]
Gross Carrying Amount	$ 654,208	$ 646,928
Accumulated Amortization	(556,998)	(549,238)
Intangible Assets, Net	97,210	97,690
Registered trademarks	52,000	52,000
Goodwill	524,149	506,607
Total	576,149	558,607
Proprietary Technology [Member]
Schedule Of Goodwill And Intangible Assets [Line Items]
Gross Carrying Amount	252,083	249,483
Accumulated Amortization	(230,757)	(227,408)
Intangible Assets, Net	21,326	22,075
Customer Contracts and Relationships [Member]
Schedule Of Goodwill And Intangible Assets [Line Items]
Gross Carrying Amount	402,125	397,445
Accumulated Amortization	(326,241)	(321,830)
Intangible Assets, Net	$ 75,884	$ 75,615