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OTHER FINANCIAL DATA Other Financial Data (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Sep. 27, 2014	Sep. 28, 2013	Sep. 29, 2012
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Selling, General and Administrative Incentive Compensation Expense	$ 17,596	$ 17,194	$ 21,988

X

- Definition

Amount of selling general and administrative incentive compensation expenses during the reporting period.

+ References

No definition available.

+ Details

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Namespace Prefix:	klic_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

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- Details

Name:	us-gaap_OrganizationConsolidationAndPresentationOfFinancialStatementsAbstract
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration