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Business Segment Information (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Apr. 04, 2015 Segment	Mar. 29, 2014
Segment Reporting [Abstract]
Number of reportable segments	2us-gaap_NumberOfReportableSegments
Revenues:
Revenues	$ 92,251us-gaap_SalesRevenueNet	$ 93,367us-gaap_SalesRevenueNet
Income from Continuing Operations Before Provision for Income Taxes:
Total operating income	10,371us-gaap_OperatingIncomeLoss	7,621us-gaap_OperatingIncomeLoss
Interest expense, net	(178)us-gaap_InterestIncomeExpenseNet	(84)us-gaap_InterestIncomeExpenseNet
Income from Continuing Operations Before Provision for Income Taxes	10,193us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	7,537us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest
Capital Expenditures:
Capital expenditures	1,216us-gaap_PaymentsToAcquirePropertyPlantAndEquipment	539us-gaap_PaymentsToAcquirePropertyPlantAndEquipment
Corporate and Fiber-Based Products [Member]
Income from Continuing Operations Before Provision for Income Taxes:
Total operating income	(4,157)us-gaap_OperatingIncomeLoss / us-gaap_StatementBusinessSegmentsAxis = kai_CorporateAndFiberBasedProductsMember	(3,143)us-gaap_OperatingIncomeLoss / us-gaap_StatementBusinessSegmentsAxis = kai_CorporateAndFiberBasedProductsMember
Other [Member]
Capital Expenditures:
Capital expenditures	264us-gaap_PaymentsToAcquirePropertyPlantAndEquipment / us-gaap_StatementBusinessSegmentsAxis = kai_WoodProcessingFiberBasedProductsAndCorporateMember	22us-gaap_PaymentsToAcquirePropertyPlantAndEquipment / us-gaap_StatementBusinessSegmentsAxis = kai_WoodProcessingFiberBasedProductsAndCorporateMember
Operating Segment [Member] | Papermaking Systems [Member]
Revenues:
Revenues	80,655us-gaap_SalesRevenueNet / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = kai_PapermakingSystemsMember	78,184us-gaap_SalesRevenueNet / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = kai_PapermakingSystemsMember
Income from Continuing Operations Before Provision for Income Taxes:
Total operating income	12,283us-gaap_OperatingIncomeLoss / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = kai_PapermakingSystemsMember	9,410us-gaap_OperatingIncomeLoss / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = kai_PapermakingSystemsMember
Capital Expenditures:
Capital expenditures	952us-gaap_PaymentsToAcquirePropertyPlantAndEquipment / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = kai_PapermakingSystemsMember	517us-gaap_PaymentsToAcquirePropertyPlantAndEquipment / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = kai_PapermakingSystemsMember
Operating Segment [Member] | Wood Processing Systems [Member]
Revenues:
Revenues	7,772us-gaap_SalesRevenueNet / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = kai_WoodProcessingSystemsMember	11,273us-gaap_SalesRevenueNet / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = kai_WoodProcessingSystemsMember
Income from Continuing Operations Before Provision for Income Taxes:
Total operating income	2,245us-gaap_OperatingIncomeLoss / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = kai_WoodProcessingSystemsMember	1,354us-gaap_OperatingIncomeLoss / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = kai_WoodProcessingSystemsMember
Operating Segment [Member] | Fiber-Based Products [Member]
Revenues:
Revenues	$ 3,824us-gaap_SalesRevenueNet / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = kai_FiberBasedProductsMember	$ 3,910us-gaap_SalesRevenueNet / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = kai_FiberBasedProductsMember

X

- Definition

This element represents the income or loss from continuing operations attributable to the economic entity which may also be defined as revenue less expenses from ongoing operations, after income or loss from equity method investments, but before income taxes, extraordinary items, and noncontrolling interest.

+ References

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The net amount of operating interest income (expense).

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-Name Accounting Standards Codification

-Glossary Investing Activities

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Total revenue from sale of goods and services rendered during the reporting period, in the normal course of business, reduced by sales returns and allowances, and sales discounts.

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