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GOODWILL AND INTANGIBLE ASSETS (Summary of Goodwill) (Details) $ in Thousands	Dec. 30, 2017 USD ($)
Goodwill [Roll Forward]
Goodwill beginning balance	$ 56,318
Goodwill ending balance	57,063
Capital Equipment [Member]
Goodwill [Roll Forward]
Goodwill beginning balance	29,975
Goodwill ending balance	30,565
Aftermarket Products and Services [Member]
Goodwill [Roll Forward]
Goodwill beginning balance	26,343
Goodwill ending balance	$ 26,498

X

- Definition

Amount after accumulated impairment loss of an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 350
-SubTopic 20
-Section 50
-Paragraph 1
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=35741047&loc=d3e13816-109267

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 350
-SubTopic 20
-Section 45
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=6388280&loc=d3e13770-109266

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 350
-SubTopic 20
-Section 45
-Paragraph 5
-URI http://asc.fasb.org/extlink&oid=64834752&loc=SL49117168-202975

+ Details

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Balance Type:	debit
Period Type:	instant

X

- Definition

A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period.

+ References

No definition available.

+ Details

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Period Type:	duration

X

- Details

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Namespace Prefix:
Data Type:	na
Balance Type:
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X

- Details

Name:	us-gaap_SubsegmentsAxis=klic_AftermarketProductsandServicesMember
Namespace Prefix:
Data Type:	na
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Period Type: