Information about Geographic Areas and Products - Revenues by Geographic Area (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017		Dec. 31, 2016
Segment Reporting Information [Line Items]
Revenues	$ 2,608,816	$ 1,918,494	[1]	$ 1,390,985	[1]
North America
Segment Reporting Information [Line Items]
Revenues	1,725,255	1,290,043		948,079
EMEA
Segment Reporting Information [Line Items]
Revenues	654,677	475,411		339,317
Asia Pacific and other
Segment Reporting Information [Line Items]
Revenues	$ 228,884	$ 153,040		$ 103,589

[1] As adjusted to reflect the impact of the full retrospective adoption of Topic 606.