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BASIS OF PRESENTATION (Inventories) (Narrative) (Details) | 3 Months Ended
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Dec. 31, 2016
Equipment [Member] |
Inventory [Line Items] |
Reserves For Inventory In Excess Of Demand Inventory Future Consumption Period | 18 months
Spare Parts [Member] |
Inventory [Line Items] |
Reserves For Inventory In Excess Of Demand Inventory Future Consumption Period | 24 months
Expendable Tools [Member] |
Inventory [Line Items] |
Reserves For Inventory In Excess Of Demand Inventory Future Consumption Period | 12 months

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- Definition Reserves for Inventory in Excess of Demand Inventory Future Consumption Period. + References No definition available. + Details
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Balance Type: | na
Period Type: | duration

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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
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Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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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: |

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- Details
Name: | us-gaap_PublicUtilitiesInventoryAxis=klic_ExpendableToolsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |