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Business Segment and Geographical Information - Revenues and Assets (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended								12 Months Ended
	Jan. 03, 2015	Sep. 27, 2014	Jun. 28, 2014	Mar. 29, 2014	Dec. 28, 2013	Sep. 28, 2013	Jun. 29, 2013	Mar. 30, 2013	Jan. 03, 2015	Dec. 28, 2013	Dec. 29, 2012
Revenues by Product line [Abstract]
Revenues	$ 105,206us-gaap_SalesRevenueNet	$ 98,719us-gaap_SalesRevenueNet	$ 104,835us-gaap_SalesRevenueNet	$ 93,367us-gaap_SalesRevenueNet	$ 94,815us-gaap_SalesRevenueNet	$ 91,315us-gaap_SalesRevenueNet	$ 82,165us-gaap_SalesRevenueNet	$ 76,204us-gaap_SalesRevenueNet	$ 402,127us-gaap_SalesRevenueNet	$ 344,499us-gaap_SalesRevenueNet	$ 331,751us-gaap_SalesRevenueNet
Income from Continuing Operations Before Provision for Income Taxes [Abstract]
Income from Continuing Operations Before Provision for Income Taxes									41,518us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	33,026us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	35,930us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest
Total operating income									42,086us-gaap_OperatingIncomeLoss	33,303us-gaap_OperatingIncomeLoss	36,444us-gaap_OperatingIncomeLoss
Interest expense, net									(568)us-gaap_InterestIncomeExpenseNet	(277)us-gaap_InterestIncomeExpenseNet	(514)us-gaap_InterestIncomeExpenseNet
Total Assets:
Total Assets from Continuing Operations	413,631kai_TotalAssetsFromContinuingOperations				442,024kai_TotalAssetsFromContinuingOperations				413,631kai_TotalAssetsFromContinuingOperations	442,024kai_TotalAssetsFromContinuingOperations	358,435kai_TotalAssetsFromContinuingOperations
Total Assets from Discontinued Operations	116kai_TotalAssetsFromDiscontinuedOperations				144kai_TotalAssetsFromDiscontinuedOperations				116kai_TotalAssetsFromDiscontinuedOperations	144kai_TotalAssetsFromDiscontinuedOperations	513kai_TotalAssetsFromDiscontinuedOperations
Total Assets	413,747us-gaap_Assets				442,168us-gaap_Assets				413,747us-gaap_Assets	442,168us-gaap_Assets	358,948us-gaap_Assets
Depreciation and Amortization:
Depreciation and amortization									11,189us-gaap_DepreciationDepletionAndAmortization	9,775us-gaap_DepreciationDepletionAndAmortization	8,384us-gaap_DepreciationDepletionAndAmortization
Capital Expenditures:
Capital expenditures									6,755us-gaap_PaymentsToAcquirePropertyPlantAndEquipment	6,261us-gaap_PaymentsToAcquirePropertyPlantAndEquipment	4,250us-gaap_PaymentsToAcquirePropertyPlantAndEquipment
Long-lived assets	44,965us-gaap_NoncurrentAssets				44,885us-gaap_NoncurrentAssets				44,965us-gaap_NoncurrentAssets	44,885us-gaap_NoncurrentAssets	39,168us-gaap_NoncurrentAssets
Export Revenues Included in United States Revenues Above									6,508kai_ExportRevenuesIncludedInUnitedStatesRevenuesAbove	9,685kai_ExportRevenuesIncludedInUnitedStatesRevenuesAbove	20,871kai_ExportRevenuesIncludedInUnitedStatesRevenuesAbove
United States
Revenues by Product line [Abstract]
Revenues									174,003us-gaap_SalesRevenueNet / us-gaap_StatementGeographicalAxis = country_US	129,131us-gaap_SalesRevenueNet / us-gaap_StatementGeographicalAxis = country_US	128,663us-gaap_SalesRevenueNet / us-gaap_StatementGeographicalAxis = country_US
Capital Expenditures:
Long-lived assets	15,685us-gaap_NoncurrentAssets / us-gaap_StatementGeographicalAxis = country_US				14,118us-gaap_NoncurrentAssets / us-gaap_StatementGeographicalAxis = country_US				15,685us-gaap_NoncurrentAssets / us-gaap_StatementGeographicalAxis = country_US	14,118us-gaap_NoncurrentAssets / us-gaap_StatementGeographicalAxis = country_US	13,702us-gaap_NoncurrentAssets / us-gaap_StatementGeographicalAxis = country_US
China
Revenues by Product line [Abstract]
Revenues									43,867us-gaap_SalesRevenueNet / us-gaap_StatementGeographicalAxis = country_CN	50,678us-gaap_SalesRevenueNet / us-gaap_StatementGeographicalAxis = country_CN	53,242us-gaap_SalesRevenueNet / us-gaap_StatementGeographicalAxis = country_CN
Capital Expenditures:
Long-lived assets	13,996us-gaap_NoncurrentAssets / us-gaap_StatementGeographicalAxis = country_CN				14,603us-gaap_NoncurrentAssets / us-gaap_StatementGeographicalAxis = country_CN				13,996us-gaap_NoncurrentAssets / us-gaap_StatementGeographicalAxis = country_CN	14,603us-gaap_NoncurrentAssets / us-gaap_StatementGeographicalAxis = country_CN	15,136us-gaap_NoncurrentAssets / us-gaap_StatementGeographicalAxis = country_CN
Other
Revenues by Product line [Abstract]
Revenues									184,257us-gaap_SalesRevenueNet / us-gaap_StatementGeographicalAxis = kai_SegmentGeographicalGroupsOfCountriesOtherCountriesMember	164,690us-gaap_SalesRevenueNet / us-gaap_StatementGeographicalAxis = kai_SegmentGeographicalGroupsOfCountriesOtherCountriesMember	149,846us-gaap_SalesRevenueNet / us-gaap_StatementGeographicalAxis = kai_SegmentGeographicalGroupsOfCountriesOtherCountriesMember
Capital Expenditures:
Long-lived assets	15,284us-gaap_NoncurrentAssets / us-gaap_StatementGeographicalAxis = kai_SegmentGeographicalGroupsOfCountriesOtherCountriesMember				16,164us-gaap_NoncurrentAssets / us-gaap_StatementGeographicalAxis = kai_SegmentGeographicalGroupsOfCountriesOtherCountriesMember				15,284us-gaap_NoncurrentAssets / us-gaap_StatementGeographicalAxis = kai_SegmentGeographicalGroupsOfCountriesOtherCountriesMember	16,164us-gaap_NoncurrentAssets / us-gaap_StatementGeographicalAxis = kai_SegmentGeographicalGroupsOfCountriesOtherCountriesMember	10,330us-gaap_NoncurrentAssets / us-gaap_StatementGeographicalAxis = kai_SegmentGeographicalGroupsOfCountriesOtherCountriesMember
Papermaking Systems Segment
Revenues by Product line [Abstract]
Revenues									348,199us-gaap_SalesRevenueNet / us-gaap_StatementBusinessSegmentsAxis = kai_PapermakingSystemsMember	328,708us-gaap_SalesRevenueNet / us-gaap_StatementBusinessSegmentsAxis = kai_PapermakingSystemsMember	321,026us-gaap_SalesRevenueNet / us-gaap_StatementBusinessSegmentsAxis = kai_PapermakingSystemsMember
Income from Continuing Operations Before Provision for Income Taxes [Abstract]
Income from Continuing Operations Before Provision for Income Taxes									50,485us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest / us-gaap_StatementBusinessSegmentsAxis = kai_PapermakingSystemsMember	47,144us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest / us-gaap_StatementBusinessSegmentsAxis = kai_PapermakingSystemsMember	48,618us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest / us-gaap_StatementBusinessSegmentsAxis = kai_PapermakingSystemsMember
Total Assets:
Total Assets from Continuing Operations	343,937kai_TotalAssetsFromContinuingOperations / us-gaap_StatementBusinessSegmentsAxis = kai_PapermakingSystemsMember				364,102kai_TotalAssetsFromContinuingOperations / us-gaap_StatementBusinessSegmentsAxis = kai_PapermakingSystemsMember				343,937kai_TotalAssetsFromContinuingOperations / us-gaap_StatementBusinessSegmentsAxis = kai_PapermakingSystemsMember	364,102kai_TotalAssetsFromContinuingOperations / us-gaap_StatementBusinessSegmentsAxis = kai_PapermakingSystemsMember	347,540kai_TotalAssetsFromContinuingOperations / us-gaap_StatementBusinessSegmentsAxis = kai_PapermakingSystemsMember
Depreciation and Amortization:
Depreciation and amortization									7,724us-gaap_DepreciationDepletionAndAmortization / us-gaap_StatementBusinessSegmentsAxis = kai_PapermakingSystemsMember	8,434us-gaap_DepreciationDepletionAndAmortization / us-gaap_StatementBusinessSegmentsAxis = kai_PapermakingSystemsMember	7,903us-gaap_DepreciationDepletionAndAmortization / us-gaap_StatementBusinessSegmentsAxis = kai_PapermakingSystemsMember
Capital Expenditures:
Capital expenditures									5,640us-gaap_PaymentsToAcquirePropertyPlantAndEquipment / us-gaap_StatementBusinessSegmentsAxis = kai_PapermakingSystemsMember	5,843us-gaap_PaymentsToAcquirePropertyPlantAndEquipment / us-gaap_StatementBusinessSegmentsAxis = kai_PapermakingSystemsMember	3,982us-gaap_PaymentsToAcquirePropertyPlantAndEquipment / us-gaap_StatementBusinessSegmentsAxis = kai_PapermakingSystemsMember
Wood Processing Systems
Revenues by Product line [Abstract]
Revenues									41,647us-gaap_SalesRevenueNet / us-gaap_StatementBusinessSegmentsAxis = kai_WoodProcessingSystemsSegmentMember	4,573us-gaap_SalesRevenueNet / us-gaap_StatementBusinessSegmentsAxis = kai_WoodProcessingSystemsSegmentMember	0us-gaap_SalesRevenueNet / us-gaap_StatementBusinessSegmentsAxis = kai_WoodProcessingSystemsSegmentMember
Income from Continuing Operations Before Provision for Income Taxes [Abstract]
Income from Continuing Operations Before Provision for Income Taxes									6,977us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest / us-gaap_StatementBusinessSegmentsAxis = kai_WoodProcessingSystemsSegmentMember	(382)us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest / us-gaap_StatementBusinessSegmentsAxis = kai_WoodProcessingSystemsSegmentMember	0us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest / us-gaap_StatementBusinessSegmentsAxis = kai_WoodProcessingSystemsSegmentMember
Total Assets:
Total Assets from Continuing Operations	55,634kai_TotalAssetsFromContinuingOperations / us-gaap_StatementBusinessSegmentsAxis = kai_WoodProcessingSystemsSegmentMember				63,493kai_TotalAssetsFromContinuingOperations / us-gaap_StatementBusinessSegmentsAxis = kai_WoodProcessingSystemsSegmentMember				55,634kai_TotalAssetsFromContinuingOperations / us-gaap_StatementBusinessSegmentsAxis = kai_WoodProcessingSystemsSegmentMember	63,493kai_TotalAssetsFromContinuingOperations / us-gaap_StatementBusinessSegmentsAxis = kai_WoodProcessingSystemsSegmentMember	0kai_TotalAssetsFromContinuingOperations / us-gaap_StatementBusinessSegmentsAxis = kai_WoodProcessingSystemsSegmentMember
Depreciation and Amortization:
Depreciation and amortization									2,977us-gaap_DepreciationDepletionAndAmortization / us-gaap_StatementBusinessSegmentsAxis = kai_WoodProcessingSystemsSegmentMember	850us-gaap_DepreciationDepletionAndAmortization / us-gaap_StatementBusinessSegmentsAxis = kai_WoodProcessingSystemsSegmentMember	0us-gaap_DepreciationDepletionAndAmortization / us-gaap_StatementBusinessSegmentsAxis = kai_WoodProcessingSystemsSegmentMember
Fiber-based Products
Revenues by Product line [Abstract]
Revenues									12,281us-gaap_SalesRevenueNet / us-gaap_StatementBusinessSegmentsAxis = kai_FiberBasedProductsMember	11,218us-gaap_SalesRevenueNet / us-gaap_StatementBusinessSegmentsAxis = kai_FiberBasedProductsMember	10,725us-gaap_SalesRevenueNet / us-gaap_StatementBusinessSegmentsAxis = kai_FiberBasedProductsMember
Corporate and Fiber-based Products
Income from Continuing Operations Before Provision for Income Taxes [Abstract]
Income from Continuing Operations Before Provision for Income Taxes									(15,376)us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest / us-gaap_StatementBusinessSegmentsAxis = kai_CorporateAndFiberBasedProductsMember	(13,459)us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest / us-gaap_StatementBusinessSegmentsAxis = kai_CorporateAndFiberBasedProductsMember	(12,174)us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest / us-gaap_StatementBusinessSegmentsAxis = kai_CorporateAndFiberBasedProductsMember
Total Assets:
Total Assets from Continuing Operations	14,060kai_TotalAssetsFromContinuingOperations / us-gaap_StatementBusinessSegmentsAxis = kai_CorporateAndFiberBasedProductsMember				14,429kai_TotalAssetsFromContinuingOperations / us-gaap_StatementBusinessSegmentsAxis = kai_CorporateAndFiberBasedProductsMember				14,060kai_TotalAssetsFromContinuingOperations / us-gaap_StatementBusinessSegmentsAxis = kai_CorporateAndFiberBasedProductsMember	14,429kai_TotalAssetsFromContinuingOperations / us-gaap_StatementBusinessSegmentsAxis = kai_CorporateAndFiberBasedProductsMember	10,895kai_TotalAssetsFromContinuingOperations / us-gaap_StatementBusinessSegmentsAxis = kai_CorporateAndFiberBasedProductsMember
Depreciation and Amortization:
Depreciation and amortization									488us-gaap_DepreciationDepletionAndAmortization / us-gaap_StatementBusinessSegmentsAxis = kai_CorporateAndFiberBasedProductsMember	491us-gaap_DepreciationDepletionAndAmortization / us-gaap_StatementBusinessSegmentsAxis = kai_CorporateAndFiberBasedProductsMember	481us-gaap_DepreciationDepletionAndAmortization / us-gaap_StatementBusinessSegmentsAxis = kai_CorporateAndFiberBasedProductsMember
Capital Expenditures:
Capital expenditures									1,115us-gaap_PaymentsToAcquirePropertyPlantAndEquipment / us-gaap_StatementBusinessSegmentsAxis = kai_CorporateAndFiberBasedProductsMember	418us-gaap_PaymentsToAcquirePropertyPlantAndEquipment / us-gaap_StatementBusinessSegmentsAxis = kai_CorporateAndFiberBasedProductsMember	268us-gaap_PaymentsToAcquirePropertyPlantAndEquipment / us-gaap_StatementBusinessSegmentsAxis = kai_CorporateAndFiberBasedProductsMember
Stock-Preparation | Papermaking Systems Segment
Revenues by Product line [Abstract]
Revenues									127,496us-gaap_SalesRevenueNet / us-gaap_ProductOrServiceAxis = kai_StockPreparationMember / us-gaap_StatementBusinessSegmentsAxis = kai_PapermakingSystemsMember	122,704us-gaap_SalesRevenueNet / us-gaap_ProductOrServiceAxis = kai_StockPreparationMember / us-gaap_StatementBusinessSegmentsAxis = kai_PapermakingSystemsMember	123,952us-gaap_SalesRevenueNet / us-gaap_ProductOrServiceAxis = kai_StockPreparationMember / us-gaap_StatementBusinessSegmentsAxis = kai_PapermakingSystemsMember
Doctoring, Cleaning, & Filtration | Papermaking Systems Segment
Revenues by Product line [Abstract]
Revenues									117,389us-gaap_SalesRevenueNet / us-gaap_ProductOrServiceAxis = kai_DoctoringCleaningAndFiltrationMember / us-gaap_StatementBusinessSegmentsAxis = kai_PapermakingSystemsMember	112,600us-gaap_SalesRevenueNet / us-gaap_ProductOrServiceAxis = kai_DoctoringCleaningAndFiltrationMember / us-gaap_StatementBusinessSegmentsAxis = kai_PapermakingSystemsMember	104,493us-gaap_SalesRevenueNet / us-gaap_ProductOrServiceAxis = kai_DoctoringCleaningAndFiltrationMember / us-gaap_StatementBusinessSegmentsAxis = kai_PapermakingSystemsMember
Fluid-Handling | Papermaking Systems Segment
Revenues by Product line [Abstract]
Revenues									$ 103,314us-gaap_SalesRevenueNet / us-gaap_ProductOrServiceAxis = kai_FluidHandlingMember / us-gaap_StatementBusinessSegmentsAxis = kai_PapermakingSystemsMember	$ 93,404us-gaap_SalesRevenueNet / us-gaap_ProductOrServiceAxis = kai_FluidHandlingMember / us-gaap_StatementBusinessSegmentsAxis = kai_PapermakingSystemsMember	$ 92,581us-gaap_SalesRevenueNet / us-gaap_ProductOrServiceAxis = kai_FluidHandlingMember / us-gaap_StatementBusinessSegmentsAxis = kai_PapermakingSystemsMember

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