Segment, Geographic and Product Information - Geographic Information Regarding Revenues (Detail) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022
Revenues:
Total revenues	$ 493,080	$ 435,756	$ 1,025,947	$ 942,220
U.K.
Revenues:
Total revenues	174,334	158,578	365,518	339,458
U.S.
Revenues:
Total revenues	162,387	131,959	331,724	280,779
Asia
Revenues:
Total revenues	67,729	64,236	139,100	141,285
Other Europe/MEA
Revenues:
Total revenues	44,270	40,843	99,159	93,948
France
Revenues:
Total revenues	25,407	23,345	52,545	53,607
Other Americas
Revenues:
Total revenues	$ 18,953	$ 16,795	$ 37,901	$ 33,143