Segment Reporting and Information about Geographic Areas - Schedule of Revenues by Geographic Area (Detail) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016
Revenues From External Customers And Long Lived Assets [Line Items]
Revenues	$ 2,789,557	$ 1,270,017	$ 5,485,827	$ 2,417,065
United States [Member]
Revenues From External Customers And Long Lived Assets [Line Items]
Revenues	1,523,042	830,675	2,798,250	1,458,963
China [Member]
Revenues From External Customers And Long Lived Assets [Line Items]
Revenues	463,587	132,938	967,521	252,416
Norway [Member]
Revenues From External Customers And Long Lived Assets [Line Items]
Revenues	122,102	42,372	257,504	100,809
Other [Member]
Revenues From External Customers And Long Lived Assets [Line Items]
Revenues	$ 680,826	$ 264,032	$ 1,462,552	$ 604,877