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Pension Liabilities, Net (Summary Of Components Of Net Periodic Benefit Cost) (Details) (USD $)
In Thousands, unless otherwise specified
12 Months Ended
Dec. 31, 2014
Dec. 31, 2013
Defined Benefit Pension Plans and Defined Benefit Postretirement Plans Disclosure [Abstract]    
Service cost $ 37us-gaap_DefinedBenefitPlanServiceCost $ 36us-gaap_DefinedBenefitPlanServiceCost
Interest cost 271us-gaap_DefinedBenefitPlanInterestCost 349us-gaap_DefinedBenefitPlanInterestCost
Expected return on plan assets (146)us-gaap_DefinedBenefitPlanExpectedReturnOnPlanAssets (245)us-gaap_DefinedBenefitPlanExpectedReturnOnPlanAssets
Exchange rates differences 15crnt_DefinedBenefitPlanNetPeriodicBenefitCostExchangeRatesDifferences 60crnt_DefinedBenefitPlanNetPeriodicBenefitCostExchangeRatesDifferences
Settlement loss recognized (7,007)us-gaap_DefinedBenefitPlanRecognizedNetGainLossDueToSettlements1 1,167us-gaap_DefinedBenefitPlanRecognizedNetGainLossDueToSettlements1
Net periodic benefit cost $ 177us-gaap_DefinedBenefitPlanNetPeriodicBenefitCost $ 1,367us-gaap_DefinedBenefitPlanNetPeriodicBenefitCost