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Income Taxes Deferred Income Taxes (Details) (USD $)
 12 Months Ended
Dec. 31, 2014
Dec. 31, 2013
Dec. 31, 2012
Tax effect of temporary differences [Line Items]      
Deferred Tax Assets, Tax Deferred Expense, Compensation and Benefits, Pensions $ 75,026,000us-gaap_DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsPensions $ 53,108,000us-gaap_DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsPensions  
Deferred Tax Assets, Inventory 10,332,000us-gaap_DeferredTaxAssetsInventory 13,797,000us-gaap_DeferredTaxAssetsInventory  
Deferred Tax Assets, Tax Credit Carryforwards 9,895,000us-gaap_DeferredTaxAssetsTaxCreditCarryforwards 7,540,000us-gaap_DeferredTaxAssetsTaxCreditCarryforwards  
Deferred Tax Assets, Long term contracts 3,477,000kamn_DeferredTaxAssetsLongtermcontracts 6,345,000kamn_DeferredTaxAssetsLongtermcontracts  
Deferred Tax Assets, Tax Deferred Expense, Reserves and Accruals, Accrued Liabilities 11,627,000us-gaap_DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsAccruedLiabilities 11,295,000us-gaap_DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsAccruedLiabilities  
Deferred Tax Assets, Gross 110,357,000us-gaap_DeferredTaxAssetsGross 92,085,000us-gaap_DeferredTaxAssetsGross  
Deferred Tax Liabilities, Property, Plant and Equipment (15,666,000)us-gaap_DeferredTaxLiabilitiesPropertyPlantAndEquipment (17,741,000)us-gaap_DeferredTaxLiabilitiesPropertyPlantAndEquipment  
Deferred Tax Liabilities, Other Finite-Lived Assets (29,693,000)us-gaap_DeferredTaxLiabilitiesOtherFiniteLivedAssets (28,798,000)us-gaap_DeferredTaxLiabilitiesOtherFiniteLivedAssets  
Deferred Tax Liabilities, Other (3,096,000)us-gaap_DeferredTaxLiabilitiesOther (4,382,000)us-gaap_DeferredTaxLiabilitiesOther  
Deferred Tax Liabilities, Net (48,455,000)us-gaap_DeferredTaxLiabilities (50,921,000)us-gaap_DeferredTaxLiabilities  
Net deferred tax assets before valuation allowance 61,902,000us-gaap_DeferredTaxAssetsLiabilitiesNet 41,164,000us-gaap_DeferredTaxAssetsLiabilitiesNet  
Deferred Tax Assets, Valuation allowance (4,694,000)us-gaap_DeferredTaxAssetsValuationAllowance (4,657,000)us-gaap_DeferredTaxAssetsValuationAllowance  
Net deferred tax assets after valuation allowance 57,208,000us-gaap_DeferredTaxAssetsNet 36,507,000us-gaap_DeferredTaxAssetsNet  
Pre-tax income (loss) from foreign operations (2,300,000)us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesForeign (3,000,000)us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesForeign 1,400,000us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesForeign
Undistributed earnings from foreign subsidiaries 26,600,000us-gaap_UndistributedEarningsOfForeignSubsidiaries    
Distribution Segment Mexico Operations [Member]      
Tax effect of temporary differences [Line Items]      
Deferred Tax Assets, Capital Loss Carryforwards $ 2,700,000us-gaap_DeferredTaxAssetsCapitalLossCarryforwards
/ us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsAxis
= kamn_DistributionSegmentMexicoOperationsMember