Segment, Geographic and Product Information - Geographic Information Regarding Revenues (Detail) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
Revenues:
Total revenues	$ 482,694	$ 416,567	$ 1,508,641	$ 1,358,787
U.K.
Revenues:
Total revenues	172,309	149,281	537,827	488,739
U.S.
Revenues:
Total revenues	152,918	126,917	484,642	407,696
Asia
Revenues:
Total revenues	69,635	65,761	208,735	207,046
Other Europe/MEA
Revenues:
Total revenues	47,893	36,695	147,052	130,643
France
Revenues:
Total revenues	20,809	20,218	73,354	73,825
Other Americas
Revenues:
Total revenues	$ 19,130	$ 17,695	$ 57,031	$ 50,838