Segment Reporting and Information about Geographic Areas - Schedule of Long-Lived Assets by Geographic Area (Detail) - USD ($) $ in Thousands	Mar. 31, 2017	Dec. 31, 2016
Revenues From External Customers And Long Lived Assets [Line Items]
Long-lived Assets	$ 13,102,541	$ 11,902,839
United States [Member]
Revenues From External Customers And Long Lived Assets [Line Items]
Long-lived Assets	12,505,153	11,399,545
International [Member]
Revenues From External Customers And Long Lived Assets [Line Items]
Long-lived Assets	$ 597,388	$ 503,294