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SHAREHOLDERS' EQUITY AND EMPLOYEE BENEFIT PLANS (Narrative) (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended
	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.

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The relative total shareholders' return average stock price calculation period

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- Definition

Share based compensation arrangement by share based payment award options vesting period.

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- Definition

The share based compensation arrangement by share based payment award vesting percentage reported.

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- Definition

Percentage of employees' gross pay for which the employer contributes a matching contribution to a defined contribution plan.

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No definition available.

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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

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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.

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Amount of stock repurchase plan authorized.

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Number of shares that have been repurchased during the period and are being held in treasury.

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-Publisher SEC

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-Number 210

-Section 04

-Article 3



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Equity impact of the cost of common and preferred stock that were repurchased during the period. Recorded using the par value method.

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-Publisher SEC

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