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BUSINESS COMBINATION: (Details 2) (USD $)
In Thousands, except Per Share data, unless otherwise specified
1 Months Ended 12 Months Ended 0 Months Ended
Aug. 15, 2013
Dec. 31, 2013
Dec. 31, 2012
Jul. 02, 2013
Aug. 15, 2013
Feb. 07, 2011
Identifiable intangible assets            
Purchased intangible assets   $ 44,746us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedIntangibles        
IPtronics and Kotura            
Identifiable intangible assets            
Purchased intangible assets   44,746us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedIntangibles
/ us-gaap_BusinessAcquisitionAxis
= mlnx_IPtronicsASAndKoturaMember
       
Valuations of IPR&D at acquisition            
Estimated cost to complete 26,759mlnx_BusinessCombinationAcquiredIntangibleAssetsValuationAssumptionsEstimatedCompletionCosts
/ us-gaap_BusinessAcquisitionAxis
= mlnx_IPtronicsASAndKoturaMember
         
Fair value 13,764mlnx_BusinessCombinationInProcessResearchAndDevelopmentValuationAssumptionsFairValue
/ us-gaap_BusinessAcquisitionAxis
= mlnx_IPtronicsASAndKoturaMember
      13,764mlnx_BusinessCombinationInProcessResearchAndDevelopmentValuationAssumptionsFairValue
/ us-gaap_BusinessAcquisitionAxis
= mlnx_IPtronicsASAndKoturaMember
 
Unaudited pro forma information            
Pro forma net revenue   402,107us-gaap_BusinessAcquisitionsProFormaRevenue
/ us-gaap_BusinessAcquisitionAxis
= mlnx_IPtronicsASAndKoturaMember
521,780us-gaap_BusinessAcquisitionsProFormaRevenue
/ us-gaap_BusinessAcquisitionAxis
= mlnx_IPtronicsASAndKoturaMember
     
Pro forma net income (loss)   (30,613)us-gaap_BusinessAcquisitionsProFormaNetIncomeLoss
/ us-gaap_BusinessAcquisitionAxis
= mlnx_IPtronicsASAndKoturaMember
100,748us-gaap_BusinessAcquisitionsProFormaNetIncomeLoss
/ us-gaap_BusinessAcquisitionAxis
= mlnx_IPtronicsASAndKoturaMember
     
Pro forma net income (loss) per share basic (in dollars per share)   $ (0.71)us-gaap_BusinessAcquisitionProFormaEarningsPerShareBasic
/ us-gaap_BusinessAcquisitionAxis
= mlnx_IPtronicsASAndKoturaMember
$ 2.44us-gaap_BusinessAcquisitionProFormaEarningsPerShareBasic
/ us-gaap_BusinessAcquisitionAxis
= mlnx_IPtronicsASAndKoturaMember
     
Pro forma net income (loss) per share diluted (in dollars per share)   $ (0.71)us-gaap_BusinessAcquisitionProFormaEarningsPerShareDiluted
/ us-gaap_BusinessAcquisitionAxis
= mlnx_IPtronicsASAndKoturaMember
$ 2.29us-gaap_BusinessAcquisitionProFormaEarningsPerShareDiluted
/ us-gaap_BusinessAcquisitionAxis
= mlnx_IPtronicsASAndKoturaMember
     
IPtronics            
Identifiable intangible assets            
Purchased intangible assets       17,229us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedIntangibles
/ us-gaap_BusinessAcquisitionAxis
= mlnx_IPtronicsASMember
   
Kotura            
Identifiable intangible assets            
Purchased intangible assets 27,517us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedIntangibles
/ us-gaap_BusinessAcquisitionAxis
= mlnx_KoturaMember
      27,517us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedIntangibles
/ us-gaap_BusinessAcquisitionAxis
= mlnx_KoturaMember
 
Voltaire Ltd            
Identifiable intangible assets            
Purchased intangible assets           36,052us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedIntangibles
/ us-gaap_BusinessAcquisitionAxis
= mlnx_VoltaireLtdMember
Licensed technology | IPtronics and Kotura            
Identifiable intangible assets            
Purchased intangible assets   135us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedIntangibles
/ us-gaap_BusinessAcquisitionAxis
= mlnx_IPtronicsASAndKoturaMember
/ us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis
= us-gaap_LicensingAgreementsMember
       
Weighted average useful life   6 years        
Developed technology | IPtronics and Kotura            
Identifiable intangible assets            
Purchased intangible assets   27,701us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedIntangibles
/ us-gaap_BusinessAcquisitionAxis
= mlnx_IPtronicsASAndKoturaMember
/ us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis
= us-gaap_DevelopedTechnologyRightsMember
       
Weighted average useful life   5 years        
Developed technology | IPtronics            
Identifiable intangible assets            
Risk Adjusted Discount Rate (as a percent)       17.50%us-gaap_FairValueInputsDiscountRate
/ us-gaap_BusinessAcquisitionAxis
= mlnx_IPtronicsASMember
/ us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis
= us-gaap_DevelopedTechnologyRightsMember
   
Developed technology | Kotura            
Identifiable intangible assets            
Risk Adjusted Discount Rate (as a percent)         15.50%us-gaap_FairValueInputsDiscountRate
/ us-gaap_BusinessAcquisitionAxis
= mlnx_KoturaMember
/ us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis
= us-gaap_DevelopedTechnologyRightsMember
 
Developed technology | Voltaire Ltd            
Identifiable intangible assets            
Purchased intangible assets           20,378us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedIntangibles
/ us-gaap_BusinessAcquisitionAxis
= mlnx_VoltaireLtdMember
/ us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis
= us-gaap_DevelopedTechnologyRightsMember
Developed technology | Voltaire Ltd | Minimum            
Identifiable intangible assets            
Weighted average useful life           2 years
Developed technology | Voltaire Ltd | Maximum            
Identifiable intangible assets            
Weighted average useful life           3 years
In-process research and development | IPtronics and Kotura            
Identifiable intangible assets            
Purchased intangible assets   13,764us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedIntangibles
/ us-gaap_BusinessAcquisitionAxis
= mlnx_IPtronicsASAndKoturaMember
/ us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis
= us-gaap_InProcessResearchAndDevelopmentMember
       
Number of projects completed   0mlnx_BusinessCombinationNumberOfProjectsCompleted
/ us-gaap_BusinessAcquisitionAxis
= mlnx_IPtronicsASAndKoturaMember
/ us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis
= us-gaap_InProcessResearchAndDevelopmentMember
       
In-process research and development | IPtronics | Modulator drivers - 4x25Gb/s            
Identifiable intangible assets            
Risk Adjusted Discount Rate (as a percent)       19.50%us-gaap_FairValueInputsDiscountRate
/ us-gaap_BusinessAcquisitionAxis
= mlnx_IPtronicsASMember
/ us-gaap_CapitalizedCostsOfUnprovedPropertiesExcludedFromAmortizationByPropertyOrProjectAxis
= mlnx_ModulatorDriversMember
/ us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis
= us-gaap_InProcessResearchAndDevelopmentMember
   
Valuations of IPR&D at acquisition            
Average Estimated time to complete       18 months    
Estimated cost to complete       9,549mlnx_BusinessCombinationAcquiredIntangibleAssetsValuationAssumptionsEstimatedCompletionCosts
/ us-gaap_BusinessAcquisitionAxis
= mlnx_IPtronicsASMember
/ us-gaap_CapitalizedCostsOfUnprovedPropertiesExcludedFromAmortizationByPropertyOrProjectAxis
= mlnx_ModulatorDriversMember
/ us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis
= us-gaap_InProcessResearchAndDevelopmentMember
   
Fair value       4,121mlnx_BusinessCombinationInProcessResearchAndDevelopmentValuationAssumptionsFairValue
/ us-gaap_BusinessAcquisitionAxis
= mlnx_IPtronicsASMember
/ us-gaap_CapitalizedCostsOfUnprovedPropertiesExcludedFromAmortizationByPropertyOrProjectAxis
= mlnx_ModulatorDriversMember
/ us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis
= us-gaap_InProcessResearchAndDevelopmentMember
   
In-process research and development | Kotura | Silicon photonics modulator - 4x25Gb/s            
Identifiable intangible assets            
Risk Adjusted Discount Rate (as a percent)         16.50%us-gaap_FairValueInputsDiscountRate
/ us-gaap_BusinessAcquisitionAxis
= mlnx_KoturaMember
/ us-gaap_CapitalizedCostsOfUnprovedPropertiesExcludedFromAmortizationByPropertyOrProjectAxis
= mlnx_SiliconPhotonicsModulatorMember
/ us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis
= us-gaap_InProcessResearchAndDevelopmentMember
 
Valuations of IPR&D at acquisition            
Average Estimated time to complete         18 months  
Estimated cost to complete         17,210mlnx_BusinessCombinationAcquiredIntangibleAssetsValuationAssumptionsEstimatedCompletionCosts
/ us-gaap_BusinessAcquisitionAxis
= mlnx_KoturaMember
/ us-gaap_CapitalizedCostsOfUnprovedPropertiesExcludedFromAmortizationByPropertyOrProjectAxis
= mlnx_SiliconPhotonicsModulatorMember
/ us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis
= us-gaap_InProcessResearchAndDevelopmentMember
 
Fair value 9,643mlnx_BusinessCombinationInProcessResearchAndDevelopmentValuationAssumptionsFairValue
/ us-gaap_BusinessAcquisitionAxis
= mlnx_KoturaMember
/ us-gaap_CapitalizedCostsOfUnprovedPropertiesExcludedFromAmortizationByPropertyOrProjectAxis
= mlnx_SiliconPhotonicsModulatorMember
/ us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis
= us-gaap_InProcessResearchAndDevelopmentMember
      9,643mlnx_BusinessCombinationInProcessResearchAndDevelopmentValuationAssumptionsFairValue
/ us-gaap_BusinessAcquisitionAxis
= mlnx_KoturaMember
/ us-gaap_CapitalizedCostsOfUnprovedPropertiesExcludedFromAmortizationByPropertyOrProjectAxis
= mlnx_SiliconPhotonicsModulatorMember
/ us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis
= us-gaap_InProcessResearchAndDevelopmentMember
 
In-process research and development | Voltaire Ltd            
Identifiable intangible assets            
Purchased intangible assets           2,754us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedIntangibles
/ us-gaap_BusinessAcquisitionAxis
= mlnx_VoltaireLtdMember
/ us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis
= us-gaap_InProcessResearchAndDevelopmentMember
Unaudited pro forma information            
Number of projects acquired           3mlnx_NumberOfProjectsAcquired
/ us-gaap_BusinessAcquisitionAxis
= mlnx_VoltaireLtdMember
/ us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis
= us-gaap_InProcessResearchAndDevelopmentMember
Customer relationship | IPtronics and Kotura            
Identifiable intangible assets            
Purchased intangible assets   2,420us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedIntangibles
/ us-gaap_BusinessAcquisitionAxis
= mlnx_IPtronicsASAndKoturaMember
/ us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis
= us-gaap_CustomerRelationshipsMember
       
Risk Adjusted Discount Rate (as a percent)   15.50%us-gaap_FairValueInputsDiscountRate
/ us-gaap_BusinessAcquisitionAxis
= mlnx_IPtronicsASAndKoturaMember
/ us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis
= us-gaap_CustomerRelationshipsMember
       
Customer relationship | IPtronics and Kotura | Minimum            
Identifiable intangible assets            
Weighted average useful life   1 year        
Customer relationship | IPtronics and Kotura | Maximum            
Identifiable intangible assets            
Weighted average useful life   2 years        
Customer relationship | Voltaire Ltd            
Identifiable intangible assets            
Purchased intangible assets           10,956us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedIntangibles
/ us-gaap_BusinessAcquisitionAxis
= mlnx_VoltaireLtdMember
/ us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis
= us-gaap_CustomerRelationshipsMember
Customer relationship | Voltaire Ltd | Minimum            
Identifiable intangible assets            
Weighted average useful life           4 years
Customer relationship | Voltaire Ltd | Maximum            
Identifiable intangible assets            
Weighted average useful life           5 years
Customer contract | Voltaire Ltd            
Identifiable intangible assets            
Purchased intangible assets           1,529us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedIntangibles
/ us-gaap_BusinessAcquisitionAxis
= mlnx_VoltaireLtdMember
/ us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis
= us-gaap_CustomerContractsMember
Weighted average useful life           2 years
Backlog | IPtronics and Kotura            
Identifiable intangible assets            
Purchased intangible assets   726us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedIntangibles
/ us-gaap_BusinessAcquisitionAxis
= mlnx_IPtronicsASAndKoturaMember
/ us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis
= us-gaap_OrderOrProductionBacklogMember
       
Backlog | IPtronics and Kotura | Maximum            
Identifiable intangible assets            
Weighted average useful life   1 year        
Backlog | Voltaire Ltd            
Identifiable intangible assets            
Purchased intangible assets           435us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedIntangibles
/ us-gaap_BusinessAcquisitionAxis
= mlnx_VoltaireLtdMember
/ us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis
= us-gaap_OrderOrProductionBacklogMember
Backlog | Voltaire Ltd | Maximum            
Identifiable intangible assets            
Weighted average useful life           1 year