Segment Information - Long-Lived Assets (Detail) - USD ($) $ in Thousands	Jun. 30, 2017	Dec. 31, 2016
Revenues from External Customers and Long-Lived Assets [Line Items]
Company's long-lived assets	$ 8,746,595	$ 7,199,210
Americas [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Company's long-lived assets	4,345,418	3,339,518
EMEA [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Company's long-lived assets	2,773,988	2,355,943
Asia-Pacific [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Company's long-lived assets	$ 1,627,189	$ 1,503,749