Segment, Geographic and Product Information - Geographic Information Regarding Revenues (Detail) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
Revenues:
Total revenues	$ 416,567	$ 473,747	$ 1,358,787	$ 1,553,773
U.K.
Revenues:
Total revenues	149,281	193,704	488,739	646,496
U.S.
Revenues:
Total revenues	126,917	120,161	407,696	393,480
Asia
Revenues:
Total revenues	65,761	75,049	207,046	233,416
Other Europe/MEA
Revenues:
Total revenues	36,695	47,282	130,643	156,053
France
Revenues:
Total revenues	20,218	22,159	73,825	77,439
Other Americas
Revenues:
Total revenues	$ 17,695	$ 15,392	$ 50,838	$ 46,889