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

X

- 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

X

- 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

X

- Details

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