Segment, Geographic and Product Information - Information Regarding Long-Lived Assets in Geographic Areas (Detail) - USD ($) $ in Thousands	Sep. 30, 2019	Dec. 31, 2018
Long-lived assets:
Total long-lived assets	$ 1,518,466	$ 1,200,069
United States [Member]
Long-lived assets:
Total long-lived assets	770,047	719,914
United Kingdom [Member]
Long-lived assets:
Total long-lived assets	567,439	367,681
Asia [Member]
Long-lived assets:
Total long-lived assets	106,534	57,626
Other Europe/MEA [Member]
Long-lived assets:
Total long-lived assets	32,756	23,917
France [Member]
Long-lived assets:
Total long-lived assets	22,493	12,294
Other Americas [Member]
Long-lived assets:
Total long-lived assets	$ 19,197	$ 18,637