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PROPERTY AND EQUIPMENT, NET (Details) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2015
Dec. 31, 2014
Dec. 31, 2013
Property, Plant and Equipment [Line Items]      
Cost $ 90,308 $ 85,780  
Accumulated depreciation 61,402 52,642  
Depreciated cost 28,906 33,138  
Depreciation expenses $ 10,338 11,377 $ 13,111
Impairment of long-lived assets related to restructuring plan 2,367 $ 2,559
Changes of property and equipment $ (1,013) (982)  
Computers, manufacturing, peripheral equipment [Member]      
Property, Plant and Equipment [Line Items]      
Cost 86,244 81,855  
Accumulated depreciation 58,469 50,271  
Office furniture and equipment [Member]      
Property, Plant and Equipment [Line Items]      
Cost 2,903 2,876  
Accumulated depreciation 2,084 1,616  
Leasehold improvements [Member]      
Property, Plant and Equipment [Line Items]      
Cost 1,161 1,049  
Accumulated depreciation $ 849 $ 755