Information about Geographic Areas and Products - Geographic Disclosures (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017	Dec. 31, 2017
Revenues by geography
Revenues	$ 589,222	$ 428,771
Percentage of U.S. revenues in North America	95.00%	94.00%
Property and equipment by geography
Property and equipment, net	$ 267,454		$ 245,124	[1]
Percentage of U.S. net property and equipment in North America	88.00%		89.00%
North America
Revenues by geography
Revenues	$ 387,473	$ 293,855
Property and equipment by geography
Property and equipment, net	173,900		$ 164,040
EMEA
Revenues by geography
Revenues	152,426	101,685
Property and equipment by geography
Property and equipment, net	61,668		50,028
Asia Pacific and other
Revenues by geography
Revenues	49,323	$ 33,231
Property and equipment by geography
Property and equipment, net	$ 31,886		$ 31,056

[1] As adjusted to reflect the impact of the full retrospective adoption of Topic 606. See Note 2 for further details.