Segment and Geographic Information - Information Regarding Long-Lived Assets in Geographic Areas (Detail) - USD ($) $ in Thousands	Jun. 30, 2017	Dec. 31, 2016
Long-lived assets:
Total long-lived assets	$ 1,704,589	$ 1,560,929
United States [Member]
Long-lived assets:
Total long-lived assets	1,299,683	1,275,482
United Kingdom [Member]
Long-lived assets:
Total long-lived assets	340,250	229,555
Asia [Member]
Long-lived assets:
Total long-lived assets	26,138	23,154
Other Europe/MEA [Member]
Long-lived assets:
Total long-lived assets	6,577	4,952
France [Member]
Long-lived assets:
Total long-lived assets	6,284	5,540
Other Americas [Member]
Long-lived assets:
Total long-lived assets	$ 25,657	$ 22,246