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SEGMENT INFORMATION (Assets by segment) (Details) - USD ($) $ in Thousands | Jul. 01, 2017 | Oct. 01, 2016
--- | --- | ---
Segment assets: |  |
Total assets | $ 1,148,916 | $ 982,444
Equipment [Member] |  |
Segment assets: |  |
Total assets | 1,042,334 | 901,316
Expendable Tools [Member] |  |
Segment assets: |  |
Total assets | $ 106,582 | $ 81,128

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- Definition -- None. No documentation exists for this element. -- + References No definition available. + Details
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Namespace Prefix: | klic_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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- Definition Sum of the carrying amounts as of the balance sheet date of all assets that are recognized. Assets are probable future economic benefits obtained or controlled by an entity as a result of past transactions or events. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-03(a)(12)) -URI http://asc.fasb.org/extlink&oid=6879938&loc=d3e572229-122910 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03(11)) -URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878 + Details
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Namespace Prefix: | us-gaap_
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Balance Type: | debit
Period Type: | instant

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- Details
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Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
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Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |