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SHARE INCENTIVE PLANS: (Details 4) (USD $)
12 Months Ended
Dec. 31, 2013
Dec. 31, 2012
Dec. 31, 2011
Aug. 31, 2012
Employee Share Purchase Plan        
Share-based compensation        
Maximum employee gross compensation percentage for ESPP participation 15.00%us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardMaximumEmployeeSubscriptionRate
/ us-gaap_PlanNameAxis
= us-gaap_EmployeeStockMember
     
ESPP purchase price percentage of market price 85.00%mlnx_ShareBasedCompensationArrangementByShareBasedPaymentAwardPurchasePricePercentOfMarketPrice
/ us-gaap_PlanNameAxis
= us-gaap_EmployeeStockMember
     
Maximum shares that can be issued and transferred 2,585,712mlnx_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAuthorizedMaximum
/ us-gaap_PlanNameAxis
= us-gaap_EmployeeStockMember
     
Shares reserved for issuance pursuant to purchase rights under the ESPP 1,085,712us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAuthorized
/ us-gaap_PlanNameAxis
= us-gaap_EmployeeStockMember
    1,500,000us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAuthorized
/ us-gaap_PlanNameAxis
= us-gaap_EmployeeStockMember
Maximum value of ordinary shares issued per employee pursuant to purchase rights under the ESPP per calendar year $ 25,000mlnx_ShareBasedCompensationArrangementByShareBasedPaymentAwardMaximumValueOfSharesPerEmployee
/ us-gaap_PlanNameAxis
= us-gaap_EmployeeStockMember
     
Shares issued under share-based compensation plan (in shares) 248,486us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardSharesIssuedInPeriod
/ us-gaap_PlanNameAxis
= us-gaap_EmployeeStockMember
219,442us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardSharesIssuedInPeriod
/ us-gaap_PlanNameAxis
= us-gaap_EmployeeStockMember
   
Weighted average price of shares issued (in dollars per share) $ 37.56us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardPerShareWeightedAveragePriceOfSharesPurchased
/ us-gaap_PlanNameAxis
= us-gaap_EmployeeStockMember
$ 28.57us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardPerShareWeightedAveragePriceOfSharesPurchased
/ us-gaap_PlanNameAxis
= us-gaap_EmployeeStockMember
   
Weighted average assumptions        
Expected volatility (as a percent) 56.18%us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsWeightedAverageVolatilityRate
/ us-gaap_PlanNameAxis
= us-gaap_EmployeeStockMember
68.05%us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsWeightedAverageVolatilityRate
/ us-gaap_PlanNameAxis
= us-gaap_EmployeeStockMember
41.80%us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsWeightedAverageVolatilityRate
/ us-gaap_PlanNameAxis
= us-gaap_EmployeeStockMember
 
Risk-free interest rate (as a percent) 0.07%us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsRiskFreeInterestRate
/ us-gaap_PlanNameAxis
= us-gaap_EmployeeStockMember
0.12%us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsRiskFreeInterestRate
/ us-gaap_PlanNameAxis
= us-gaap_EmployeeStockMember
0.10%us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsRiskFreeInterestRate
/ us-gaap_PlanNameAxis
= us-gaap_EmployeeStockMember
 
Expected life 6 months 11 days 6 months 11 days 6 months 11 days  
Share options        
Weighted average assumptions        
Expected volatility (as a percent) 57.50%us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsWeightedAverageVolatilityRate
/ us-gaap_AwardTypeAxis
= us-gaap_EmployeeStockOptionMember
56.60%us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsWeightedAverageVolatilityRate
/ us-gaap_AwardTypeAxis
= us-gaap_EmployeeStockOptionMember
55.90%us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsWeightedAverageVolatilityRate
/ us-gaap_AwardTypeAxis
= us-gaap_EmployeeStockOptionMember
 
Risk-free interest rate (as a percent) 1.54%us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsRiskFreeInterestRate
/ us-gaap_AwardTypeAxis
= us-gaap_EmployeeStockOptionMember
1.02%us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsRiskFreeInterestRate
/ us-gaap_AwardTypeAxis
= us-gaap_EmployeeStockOptionMember
1.72%us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsRiskFreeInterestRate
/ us-gaap_AwardTypeAxis
= us-gaap_EmployeeStockOptionMember
 
Expected life 4 years 8 months 19 days 6 years 3 months 6 years 3 months