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Acquisitions - Acquisition of the PAALGROUP (Details) $ in Thousands | 3 Months Ended
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Apr. 01, 2017 USD ($)
PAAL [Member] |
Business Acquisition [Line Items] |
Additional post-closing consideration | $ 165

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

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- Definition Cash outflow representing an adjustment to the purchase price of a previous acquisition. + References No definition available. + Details
Name: | us-gaap_PaymentsForPreviousAcquisition
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

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- Details
Name: | us-gaap_BusinessAcquisitionAxis=kai_PAALGROUPMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |