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SHAREHOLDERS' EQUITY AND EMPLOYEE BENEFIT PLANS (Narrative) (Details) (USD $) In Millions, unless otherwise specified | 3 Months Ended |
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Dec. 27, 2014 | Aug. 14, 2014
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |
Stock Repurchase Program, Authorized Amount |  | $ 100us-gaap_StockRepurchaseProgramAuthorizedAmount1
Description Of Maximum Percentage Of Employee Contributions and Matching Contributions Based Upon Years Of Service | employee contributions and matching Company contributions up to 4% or 6% |
Share-based Compensation Arrangement by Share-based Payment Award, Discount from Market Price, Offering Date | 100.00%us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardDiscountFromMarketPriceOfferingDate |
Relative Total Shareholder Return Average Stock Price Calculation Period | 90 days |
Total Shareholder Return Award Performance Measurement Period | 3 years |
Treasury Stock, Shares, Acquired | 0.6us-gaap_TreasuryStockSharesAcquired |
Treasury Stock, Value, Acquired, Par Value Method | $ 7.6us-gaap_TreasuryStockValueAcquiredParValueMethod |
Minimum [Member] |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |
Defined Contribution Plan, Employer Matching Contribution, Percent | 4.00%us-gaap_DefinedContributionPlanEmployerMatchingContributionPercent / us-gaap_RangeAxis = us-gaap_MinimumMember |
Share Based Compensation Arrangement By Share Based Payment Award Vesting Percentage | 0.00%klic_ShareBasedCompensationArrangementByShareBasedPaymentAwardVestingPercentage / us-gaap_RangeAxis = us-gaap_MinimumMember |
Maximum [Member] |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |
Defined Contribution Plan, Employer Matching Contribution, Percent | 6.00%us-gaap_DefinedContributionPlanEmployerMatchingContributionPercent / us-gaap_RangeAxis = us-gaap_MaximumMember |
Share Based Compensation Arrangement By Share Based Payment Award Vesting Percentage | 200.00%klic_ShareBasedCompensationArrangementByShareBasedPaymentAwardVestingPercentage / us-gaap_RangeAxis = us-gaap_MaximumMember |
Equity Incentive Plan 2009 [Member] |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Available for Grant | 3.1us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAvailableForGrant / us-gaap_PlanNameAxis = klic_EquityIncentivePlan2009Member |

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- Definition Defined benefit plan employer contribution percentage match of compensation. + References No definition available. + Details
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- Definition The relative total shareholders' return average stock price calculation period + References No definition available. + Details
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- Definition Share based compensation arrangement by share based payment award options vesting period. + References No definition available. + Details
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- Definition Percentage of employees' gross pay for which the employer contributes a matching contribution to a defined contribution plan. + References No definition available. + Details
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- Definition Discount rate from fair value on offering date that participants pay for shares. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition The difference between the maximum number of shares (or other type of equity) authorized for issuance under the plan (including the effects of amendments and adjustments), and the sum of: 1) the number of shares (or other type of equity) already issued upon exercise of options or other equity-based awards under the plan; and 2) shares (or other type of equity) reserved for issuance on granting of outstanding awards, net of cancellations and forfeitures, if applicable. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition Number of shares that have been repurchased during the period and are being held in treasury. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 04 -Article 3 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6928386&loc=d3e21463-112644 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 29, 30 -Article 5 + Details
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- Definition Equity impact of the cost of common and preferred stock that were repurchased during the period. Recorded using the par value method. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 04 -Article 3 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6928386&loc=d3e21463-112644 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.3-04) -URI http://asc.fasb.org/extlink&oid=27012166&loc=d3e187085-122770 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 30 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6405813&loc=d3e23239-112655 + Details
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