XML 157 R105.htm IDEA: XBRL DOCUMENT v2.4.1.9
Fair Value (Summary of Assets Measured at Fair Value on Non Recurring Basis) (Details) (USD $)
 12 Months Ended
Dec. 31, 2014
Dec. 31, 2013
Dec. 31, 2012
Dec. 31, 2011
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]        
Financing Receivable, Individually Evaluated for Impairment $ 21,179,000us-gaap_FinancingReceivableIndividuallyEvaluatedForImpairment $ 27,947,000us-gaap_FinancingReceivableIndividuallyEvaluatedForImpairment $ 27,157,000us-gaap_FinancingReceivableIndividuallyEvaluatedForImpairment  
non-financial assets measured at fair value on recurring basis 0cac_Nonfinancialassetsmeasuredatfairvalueonrecurringbasis      
Goodwill impairment 0us-gaap_GoodwillImpairmentLoss 2,830,000us-gaap_GoodwillImpairmentLoss 0us-gaap_GoodwillImpairmentLoss  
Servicing Asset At Amortized Value Net Of Valuation Allowance 493,000cac_ServicingAssetAtAmortizedValueNetOfValuationAllowance 726,000cac_ServicingAssetAtAmortizedValueNetOfValuationAllowance    
Other Real Estate 1,587,000us-gaap_OtherRealEstate 2,195,000us-gaap_OtherRealEstate 1,313,000us-gaap_OtherRealEstate 1,682,000us-gaap_OtherRealEstate
Assets, Fair Value Disclosure 22,516,000us-gaap_ImpairedFinancingReceivableUnpaidPrincipalBalance 30,251,000us-gaap_ImpairedFinancingReceivableUnpaidPrincipalBalance 29,257,000us-gaap_ImpairedFinancingReceivableUnpaidPrincipalBalance  
Impaired Loans Collateral Dependent [Member] | Fair Value, Measurements, Nonrecurring [Member]        
Assets:        
Assets, Fair Value Disclosure 3,581,000us-gaap_AssetsFairValueDisclosure
/ us-gaap_FairValueByAssetClassAxis
= cac_ImpairedLoanscollateraldependentMember
/ us-gaap_FairValueByMeasurementFrequencyAxis
= us-gaap_FairValueMeasurementsNonrecurringMember		 8,557,000us-gaap_AssetsFairValueDisclosure
/ us-gaap_FairValueByAssetClassAxis
= cac_ImpairedLoanscollateraldependentMember
/ us-gaap_FairValueByMeasurementFrequencyAxis
= us-gaap_FairValueMeasurementsNonrecurringMember		    
Impaired Loans Collateral Dependent [Member] | Fair Value, Measurements, Nonrecurring [Member] | Company Determined Fair Value (Level 3) [Member]        
Assets:        
Assets, Fair Value Disclosure 3,581,000us-gaap_AssetsFairValueDisclosure
/ us-gaap_FairValueByAssetClassAxis
= cac_ImpairedLoanscollateraldependentMember
/ us-gaap_FairValueByFairValueHierarchyLevelAxis
= us-gaap_FairValueInputsLevel3Member
/ us-gaap_FairValueByMeasurementFrequencyAxis
= us-gaap_FairValueMeasurementsNonrecurringMember		 8,557,000us-gaap_AssetsFairValueDisclosure
/ us-gaap_FairValueByAssetClassAxis
= cac_ImpairedLoanscollateraldependentMember
/ us-gaap_FairValueByFairValueHierarchyLevelAxis
= us-gaap_FairValueInputsLevel3Member
/ us-gaap_FairValueByMeasurementFrequencyAxis
= us-gaap_FairValueMeasurementsNonrecurringMember		    
Servicing Contracts [Member]        
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]        
Servicing Asset At Amortized Value Net Of Valuation Allowance 319,000cac_ServicingAssetAtAmortizedValueNetOfValuationAllowance
/ us-gaap_FairValueByAssetClassAxis
= us-gaap_ServicingContractsMember		 322,000cac_ServicingAssetAtAmortizedValueNetOfValuationAllowance
/ us-gaap_FairValueByAssetClassAxis
= us-gaap_ServicingContractsMember		    
Servicing Contracts [Member] | Fair Value, Measurements, Nonrecurring [Member]        
Assets:        
Assets, Fair Value Disclosure 173,000us-gaap_AssetsFairValueDisclosure
/ us-gaap_FairValueByAssetClassAxis
= us-gaap_ServicingContractsMember
/ us-gaap_FairValueByMeasurementFrequencyAxis
= us-gaap_FairValueMeasurementsNonrecurringMember		 [1] 404,000us-gaap_AssetsFairValueDisclosure
/ us-gaap_FairValueByAssetClassAxis
= us-gaap_ServicingContractsMember
/ us-gaap_FairValueByMeasurementFrequencyAxis
= us-gaap_FairValueMeasurementsNonrecurringMember		 [1]    
Servicing Contracts [Member] | Fair Value, Measurements, Nonrecurring [Member] | Observable Market Data (Level 2) [Member]        
Assets:        
Assets, Fair Value Disclosure 173,000us-gaap_AssetsFairValueDisclosure
/ us-gaap_FairValueByAssetClassAxis
= us-gaap_ServicingContractsMember
/ us-gaap_FairValueByFairValueHierarchyLevelAxis
= us-gaap_FairValueInputsLevel2Member
/ us-gaap_FairValueByMeasurementFrequencyAxis
= us-gaap_FairValueMeasurementsNonrecurringMember		 [1] 404,000us-gaap_AssetsFairValueDisclosure
/ us-gaap_FairValueByAssetClassAxis
= us-gaap_ServicingContractsMember
/ us-gaap_FairValueByFairValueHierarchyLevelAxis
= us-gaap_FairValueInputsLevel2Member
/ us-gaap_FairValueByMeasurementFrequencyAxis
= us-gaap_FairValueMeasurementsNonrecurringMember		 [1]    
Impaired Loans Specifically Reserved [Member]        
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]        
Assets, Fair Value Disclosure 17,600,000us-gaap_ImpairedFinancingReceivableUnpaidPrincipalBalance
/ us-gaap_FairValueByAssetClassAxis
= cac_ImpairedLoansSpecificallyReservedMember		 19,400,000us-gaap_ImpairedFinancingReceivableUnpaidPrincipalBalance
/ us-gaap_FairValueByAssetClassAxis
= cac_ImpairedLoansSpecificallyReservedMember		    
Other Real Estate Owned [Member]        
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]        
Other Real Estate 305,000us-gaap_OtherRealEstate
/ us-gaap_FairValueByAssetClassAxis
= cac_OtherRealEstateOwnedMember		 612,000us-gaap_OtherRealEstate
/ us-gaap_FairValueByAssetClassAxis
= cac_OtherRealEstateOwnedMember		    
Other Real Estate Owned [Member] | Fair Value, Measurements, Nonrecurring [Member]        
Assets:        
Assets, Fair Value Disclosure 1,282,000us-gaap_AssetsFairValueDisclosure
/ us-gaap_FairValueByAssetClassAxis
= cac_OtherRealEstateOwnedMember
/ us-gaap_FairValueByMeasurementFrequencyAxis
= us-gaap_FairValueMeasurementsNonrecurringMember		 1,583,000us-gaap_AssetsFairValueDisclosure
/ us-gaap_FairValueByAssetClassAxis
= cac_OtherRealEstateOwnedMember
/ us-gaap_FairValueByMeasurementFrequencyAxis
= us-gaap_FairValueMeasurementsNonrecurringMember		    
Other Real Estate Owned [Member] | Fair Value, Measurements, Nonrecurring [Member] | Company Determined Fair Value (Level 3) [Member]        
Assets:        
Assets, Fair Value Disclosure 1,282,000us-gaap_AssetsFairValueDisclosure
/ us-gaap_FairValueByAssetClassAxis
= cac_OtherRealEstateOwnedMember
/ us-gaap_FairValueByFairValueHierarchyLevelAxis
= us-gaap_FairValueInputsLevel3Member
/ us-gaap_FairValueByMeasurementFrequencyAxis
= us-gaap_FairValueMeasurementsNonrecurringMember		 1,583,000us-gaap_AssetsFairValueDisclosure
/ us-gaap_FairValueByAssetClassAxis
= cac_OtherRealEstateOwnedMember
/ us-gaap_FairValueByFairValueHierarchyLevelAxis
= us-gaap_FairValueInputsLevel3Member
/ us-gaap_FairValueByMeasurementFrequencyAxis
= us-gaap_FairValueMeasurementsNonrecurringMember		    
Financial Services        
Assets:        
Goodwill 3,900,000us-gaap_GoodwillFairValueDisclosure
/ cac_SegmentReportingInformationGoodwillAxis
= cac_FinancialServicesMember		      
Minimum [Member]        
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]        
Financing Receivable, Individually Evaluated for Impairment 250,000us-gaap_FinancingReceivableIndividuallyEvaluatedForImpairment
/ us-gaap_RangeAxis
= us-gaap_MinimumMember		      
Consumer Portfolio Segment [Member]        
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]        
Financing Receivable, Individually Evaluated for Impairment 271,000us-gaap_FinancingReceivableIndividuallyEvaluatedForImpairment
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= us-gaap_ConsumerPortfolioSegmentMember		 442,000us-gaap_FinancingReceivableIndividuallyEvaluatedForImpairment
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= us-gaap_ConsumerPortfolioSegmentMember		 259,000us-gaap_FinancingReceivableIndividuallyEvaluatedForImpairment
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= us-gaap_ConsumerPortfolioSegmentMember		  
Consumer Portfolio Segment [Member] | Company Determined Fair Value (Level 3) [Member]        
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]        
Percentage Collateral To Loans 80.00%cac_PercentageCollateralToLoans
/ us-gaap_FairValueByFairValueHierarchyLevelAxis
= us-gaap_FairValueInputsLevel3Member
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= us-gaap_ConsumerPortfolioSegmentMember		      
Commercial Portfolio Segment [Member]        
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]        
Financing Receivable, Individually Evaluated for Impairment $ 1,853,000us-gaap_FinancingReceivableIndividuallyEvaluatedForImpairment
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= us-gaap_CommercialPortfolioSegmentMember		 $ 2,635,000us-gaap_FinancingReceivableIndividuallyEvaluatedForImpairment
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= us-gaap_CommercialPortfolioSegmentMember		 $ 3,610,000us-gaap_FinancingReceivableIndividuallyEvaluatedForImpairment
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= us-gaap_CommercialPortfolioSegmentMember		  
Commercial Portfolio Segment [Member] | Company Determined Fair Value (Level 3) [Member]        
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]        
Percentage Collateral To Loans 75.00%cac_PercentageCollateralToLoans
/ us-gaap_FairValueByFairValueHierarchyLevelAxis
= us-gaap_FairValueInputsLevel3Member
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= us-gaap_CommercialPortfolioSegmentMember		      
[1] Represents MSRs deemed to be impaired and a valuation allowance was established to carry at fair value at December 31, 2014 and 2013.