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Information about Geographic Areas and Products - Property and Equipment, Net by Geographic Area (Detail) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2018
Dec. 31, 2017
Dec. 31, 2016
Segment Reporting Information [Line Items]      
Property and equipment, net $ 347,216 $ 245,124 [1]  
Percentage of U.S. Revenues in North America 94.00% 94.00% 95.00%
Percentage of U.S. net property and equipment in North America 76.00% 89.00%  
North America      
Segment Reporting Information [Line Items]      
Property and equipment, net $ 227,471 $ 164,040  
EMEA      
Segment Reporting Information [Line Items]      
Property and equipment, net 82,526 50,028  
Asia Pacific and other      
Segment Reporting Information [Line Items]      
Property and equipment, net $ 37,219 $ 31,056  
[1] As adjusted to reflect the impact of the full retrospective adoption of Topic 606.