Information about Geographic Areas and Products- Revenues by Geographic Areas (Detail) - USD ($) $ in Thousands		12 Months Ended
		Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Segment Reporting Information [Line Items]
Revenues		$ 1,390,513	$ 1,005,480	$ 682,563
Revenues by geography
Percentage of North America revenues		95.00%	95.00%	94.00%
North America
Segment Reporting Information [Line Items]
Revenues	[1]	$ 946,956	$ 702,985	$ 465,332
EMEA [Member]
Segment Reporting Information [Line Items]
Revenues	[2]	339,341	233,378	173,635
Asia Pacific and other
Segment Reporting Information [Line Items]
Revenues		$ 104,216	$ 69,117	$ 43,596

[1] Revenues attributed to the United States were approximately 95% of North America revenues for the years ended December 31, 2016 and 2015, and 94% for the year ended December 31, 2014

[2] Europe, the Middle East and Africa (EMEA