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SHAREHOLDERS' EQUITY AND EMPLOYEE BENEFIT PLANS (Accumulated other comprehensive income) (Details) (USD $)
In Thousands, unless otherwise specified
Mar. 28, 2015
Sep. 27, 2014
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]    
Gain from foreign currency translation adjustments $ 1,953us-gaap_AccumulatedOtherComprehensiveIncomeLossForeignCurrencyTranslationAdjustmentNetOfTax $ 3,199us-gaap_AccumulatedOtherComprehensiveIncomeLossForeignCurrencyTranslationAdjustmentNetOfTax
Unrecognized actuarial loss Switzerland pension plan, net of tax (609)us-gaap_AccumulatedOtherComprehensiveIncomeLossDefinedBenefitPensionAndOtherPostretirementPlansNetOfTax (609)us-gaap_AccumulatedOtherComprehensiveIncomeLossDefinedBenefitPensionAndOtherPostretirementPlansNetOfTax
Switzerland pension plan curtailment (346)klic_AccumulatedOtherComprehensiveIncomeLossCurtailmentOfPensionAndOtherPostretirementBenefitPlansNetOfTax (346)klic_AccumulatedOtherComprehensiveIncomeLossCurtailmentOfPensionAndOtherPostretirementBenefitPlansNetOfTax
Accumulated other comprehensive income $ 998us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax $ 2,244us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax