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SEGMENT INFORMATION (Assets by segment) (Details) (USD $) In Thousands, unless otherwise specified | Mar. 28, 2015 | Sep. 27, 2014
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Segment assets: |  |
Total assets | $ 977,276 us-gaap_Assets | $ 944,448 us-gaap_Assets
Equipment [Member] |  |
Segment assets: |  |
Total assets | 880,876 us-gaap_Assets / us-gaap_StatementBusinessSegmentsAxis = klic_EquipmentSegmentMember | 839,847 us-gaap_Assets / us-gaap_StatementBusinessSegmentsAxis = klic_EquipmentSegmentMember
Expendable Tools [Member] |  |
Segment assets: |  |
Total assets | $ 96,400 us-gaap_Assets / us-gaap_StatementBusinessSegmentsAxis = klic_ExpendableToolsSegmentMember | $ 104,601 us-gaap_Assets / us-gaap_StatementBusinessSegmentsAxis = klic_ExpendableToolsSegmentMember

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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 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.18) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 03 -Paragraph 12 -Article 7 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 18 -Article 5 + Details
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