Goodwill and Intangible Assets - Schedule of changes in goodwill (Detail) - USD ($) $ in Thousands	9 Months Ended	12 Months Ended
	Sep. 30, 2024	Dec. 31, 2023
Goodwill [Roll Forward]
Opening balance	$ 1,683,782	$ 1,684,196
Effect of exchange rate fluctuations	(729)	(414)
Closing balance	$ 1,683,053	$ 1,683,782