XML 73 R59.htm IDEA: XBRL DOCUMENT v3.8.0.1
PROPERTY AND EQUIPMENT, NET (Details) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2017
Dec. 31, 2016
Dec. 31, 2015
Property, Plant and Equipment [Line Items]      
Property and equipment gross $ 315,693 $ 254,175  
Accumulated depreciation 197,418 166,497  
Depreciated cost 118,275 87,678  
Depreciation expense 37,924 18,422 $ 15,575
Equipment and Leasehold Improvements [Member]      
Property, Plant and Equipment [Line Items]      
Reduction in costs 6,790 10,941  
Reduction in accumulated depreciation 6,790 10,941  
Computers and Peripheral Equipment [Member]      
Property, Plant and Equipment [Line Items]      
Property and equipment gross 212,449 181,738  
Accumulated depreciation 163,162 139,066  
Internal use software [Member]      
Property, Plant and Equipment [Line Items]      
Property and equipment gross 37,948 9,882  
Accumulated depreciation 2,924  
Office Furniture and Equipment [Member]      
Property, Plant and Equipment [Line Items]      
Property and equipment gross 12,030 13,982  
Accumulated depreciation 6,614 7,847  
Leasehold Improvements [Member]      
Property, Plant and Equipment [Line Items]      
Property and equipment gross 53,266 48,573  
Accumulated depreciation $ 24,718 $ 19,584