v3.8.0.1
Property and Equipment - Schedule of Property and Equipment and Classification of Depreciation (Details) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2017
Dec. 31, 2016
Property, Plant and Equipment [Line Items]    
Cost $ 85,362 $ 64,375
Accumulated depreciation 35,002 18,656
Net book value 50,360 45,719
Depreciation 16,580 10,391
Cost of revenues    
Property, Plant and Equipment [Line Items]    
Depreciation 8,055 5,329
Sales and marketing    
Property, Plant and Equipment [Line Items]    
Depreciation 2,405 2,320
Research and development    
Property, Plant and Equipment [Line Items]    
Depreciation 4,654 1,920
General and administrative    
Property, Plant and Equipment [Line Items]    
Depreciation 1,466 822
Leasehold improvements    
Property, Plant and Equipment [Line Items]    
Cost 43,058 32,816
Accumulated depreciation 10,541 5,521
Net book value 32,517 27,295
Computer equipment    
Property, Plant and Equipment [Line Items]    
Cost 34,644 25,572
Accumulated depreciation 20,592 10,888
Net book value 14,052 14,684
Office furniture and equipment    
Property, Plant and Equipment [Line Items]    
Cost 7,660 5,987
Accumulated depreciation 3,869 2,247
Net book value $ 3,791 $ 3,740