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Subsequent Event - (Details) (USD $)
12 Months Ended
Jan. 03, 2015
Jan. 16, 2015
Revolving credit facility    
Subsequent Event [Line Items]    
Maximum consolidated leverage ratio 3.5kai_MaximumConsolidatedLeverageRatio
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_LineOfCreditMember
 
Minimum consolidated interest charge coverage ratio 3kai_MinimumConsolidatedInterestChargeCoverageRatio
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_LineOfCreditMember
 
Subsequent event | Interest rate swap agreements    
Subsequent Event [Line Items]    
Notional amount   $ 10,000,000invest_DerivativeNotionalAmount
/ us-gaap_DerivativeInstrumentRiskAxis
= us-gaap_InterestRateSwapMember
/ us-gaap_SubsequentEventTypeAxis
= us-gaap_SubsequentEventMember
Subsequent event | Interest rate swap agreements | Three month LIBOR    
Subsequent Event [Line Items]    
Basis spread on variable rate (as a percentage)   1.50%kai_DerivativeBasisSpreadonVariableRatePlusApplicableMargin
/ us-gaap_DerivativeInstrumentRiskAxis
= us-gaap_InterestRateSwapMember
/ us-gaap_SubsequentEventTypeAxis
= us-gaap_SubsequentEventMember
/ us-gaap_VariableRateAxis
= kai_ThreeMonthLiborMember