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FAIR VALUE MEASUREMENTS (Details) - USD ($)
$ in Thousands
Jun. 30, 2015
Dec. 31, 2014
Financial assets related to foreign currency derivative hedging contracts $ 2,002 $ 127
Marketable securities 56,207 59,227
Contingent consideration related to Mailvision (221) (443)
Total Financial assets (liability) 57,988 58,911
Fair Value, Inputs, Level 2 [Member] | Fair Value, Measurements, Recurring [Member]    
Financial assets related to foreign currency derivative hedging contracts 2,002 127
Marketable securities 56,207 59,227
Contingent consideration related to Mailvision 0 0
Total Financial assets (liability) 58,209 59,354
Fair Value, Inputs, Level 3 [Member] | Fair Value, Measurements, Recurring [Member]    
Financial assets related to foreign currency derivative hedging contracts 0 0
Marketable securities 0 0
Contingent consideration related to Mailvision (221) (443)
Total Financial assets (liability) $ (221) $ (443)