Segment and Geographic Information - Information Regarding Long-Lived Assets in Geographic Areas (Detail) (USD $) In Thousands, unless otherwise specified	Sep. 30, 2014	Dec. 31, 2013
Long-lived assets:
Total long-lived assets	$ 542,051	$ 468,711
United States [Member]
Long-lived assets:
Total long-lived assets	356,744	278,593
United Kingdom [Member]
Long-lived assets:
Total long-lived assets	120,189	125,309
Asia [Member]
Long-lived assets:
Total long-lived assets	31,659	37,872
France [Member]
Long-lived assets:
Total long-lived assets	6,805	9,295
Other Americas [Member]
Long-lived assets:
Total long-lived assets	22,430	13,434
Other Europe/MEA [Member]
Long-lived assets:
Total long-lived assets	$ 4,224	$ 4,208