XML 68 R57.htm IDEA: XBRL DOCUMENT
v3.19.1

COMMITMENTS, CONTINGENCIES AND DERIVATIVES (Narrative) (Details) | 3 Months Ended | 12 Months Ended
--- | --- | ---
Mar. 31, 2019 USD ($) derivative swap | Mar. 31, 2018 USD ($) | Dec. 31, 2018 USD ($) derivative
Other Commitments [Line Items] |  |  |
Loss Contingency Accrual | $ 0 |  | $ 0
Loss on Cash Flow Hedge Ineffectiveness | 0 |  | 0
Unrealized Gain (Loss) on Derivatives | $ (181,000) | $ (12,000) |
Derivative, Number of Interest Rate Swap Agreements | swap | 2 |  |
Derivative Instruments, Gain (Loss) Reclassification from Accumulated OCI to Income, Estimated Net Amount to be Transferred | $ 715,000 |  |
Customer Loan Swaps |  |  |
Other Commitments [Line Items] |  |  |
Notional amount of derivative | 802,580,000 |  | 833,030,000
Cash held as collateral | 6,200,000 |  |
Interest rate swaps |  |  |
Other Commitments [Line Items] |  |  |
Notional amount of derivative | 43,000,000 |  | 43,000,000
Cash held as collateral | 7,100,000 |  |
Derivative Instrument Payment Of Interest Rate Swaps Designated As Cash Flow Hedges | 152,000 | 275,000 |
Forward-Starting Interest Rate Swap |  |  |
Other Commitments [Line Items] |  |  |
Notional amount of derivative | 0 |  | 25,000,000
Derivative Instrument Payment Of Interest Rate Swaps Designated As Cash Flow Hedges | 32,000 | (9,000) |
Forward Contracts [Member] |  |  |
Other Commitments [Line Items] |  |  |
Notional amount of derivative | 8,711,000 |  | 4,315,000
Unrealized Gain (Loss) on Derivatives | 83,000 | $ 19,000 |
Cancellable Commitment |  |  |
Other Commitments [Line Items] |  |  |
Contractual Amounts Of Financial Instrument | 274,500,000 |  | 270,800,000
Federal home loan bank 30-day | Interest rate swaps |  |  |
Other Commitments [Line Items] |  |  |
Notional amount of derivative | $ 251,477,000 |  | $ 118,891,000
Derivative, Number of Instruments Held | derivative | 46 |  | 25
Commercial and Industrial Sector [Member] | Interest rate swaps |  |  |
Other Commitments [Line Items] |  |  |
Notional amount of derivative | $ 401,290,000 |  | $ 416,515,000
Derivative, Number of Instruments Held | derivative | 82 |  | 82
Contract Two [Member] | Interest rate swaps |  |  |
Other Commitments [Line Items] |  |  |
Notional amount of derivative | $ 10,000,000 |  | $ 10,000,000
Contract Two [Member] | Forward-Starting Interest Rate Swap |  |  |
Other Commitments [Line Items] |  |  |
Notional amount of derivative | 0 |  | 25,000,000
Contract One [Member] | Interest rate swaps |  |  |
Other Commitments [Line Items] |  |  |
Notional amount of derivative | $ 10,000,000 |  | $ 10,000,000

X
- Definition Contractual Amounts of Financial Instrument + References No definition available. + Details
Name: | cac_ContractualAmountsOfFinancialInstrument
Namespace Prefix: | cac_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Derivative Instrument Payment Of Interest Rate Swaps Designated As Cash Flow Hedges + References No definition available. + Details
Name: | cac_DerivativeInstrumentPaymentOfInterestRateSwapsDesignatedAsCashFlowHedges
Namespace Prefix: | cac_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Derivative, Number of Interest Rate Swap Agreements + References No definition available. + Details
Name: | cac_DerivativeNumberofInterestRateSwapAgreements
Namespace Prefix: | cac_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | duration

X
- Definition Aggregate notional amount specified by the derivative(s). Expressed as an absolute value. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Article 12 -Section 13 -Sentence Column B + Details
Name: | invest_DerivativeNotionalAmount
Namespace Prefix: | invest_
Data Type: | xbrli:monetaryItemType
Balance Type: | na
Period Type: | instant

X
- Definition The estimated value of gains (losses), net anticipated to be transferred in the future from accumulated other comprehensive income into earnings. + References No definition available. + Details
Name: | us-gaap_DerivativeInstrumentsGainLossReclassificationFromAccumulatedOCIToIncomeEstimatedNetAmountToBeTransferred
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition The number of derivative instruments of a particular group held by the entity. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 1B -URI http://asc.fasb.org/extlink&oid=84234895&loc=SL5580258-113959 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 1A -Subparagraph (d) -URI http://asc.fasb.org/extlink&oid=84234895&loc=SL5579245-113959 + Details
Name: | us-gaap_DerivativeNumberOfInstrumentsHeld
Namespace Prefix: | us-gaap_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | instant

X
- Definition Amount of loss contingency liability. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 450 -SubTopic 20 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=82911808&loc=d3e14326-108349 + Details
Name: | us-gaap_LossContingencyAccrualAtCarryingValue
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition The loss recognized in earnings during the reporting period representing the amount of the cash flow hedges' ineffectiveness. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 4C -Subparagraph (d)(1) -URI http://asc.fasb.org/extlink&oid=84234895&loc=SL5624171-113959 + Details
Name: | us-gaap_LossOnCashFlowHedgeIneffectiveness
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
Name: | us-gaap_OtherCommitmentsLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Amount of cash and cash equivalents restricted as to withdrawal or usage. Cash includes, but is not limited to, currency on hand, demand deposits with banks or financial institutions, and other accounts with general characteristics of demand deposits. Cash equivalents include, but are not limited to, short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03(1)(a)) -URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-03(a)(2)) -URI http://asc.fasb.org/extlink&oid=6879938&loc=d3e572229-122910 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 50 -Paragraph 8 -URI http://asc.fasb.org/extlink&oid=98513485&loc=SL98516268-108586 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=98514028&loc=d3e3044-108585 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(1)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
Name: | us-gaap_RestrictedCashAndCashEquivalents
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition The net change in the difference between the fair value and the carrying value, or in the comparative fair values, of derivative instruments, including options, swaps, futures, and forward contracts, held at each balance sheet date, that was included in earnings for the period. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=98514028&loc=d3e3602-108585 + Details
Name: | us-gaap_UnrealizedGainLossOnDerivatives
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Details
Name: | us-gaap_DerivativeInstrumentRiskAxis=cac_CustomerLoanSwapsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DerivativeInstrumentRiskAxis=us-gaap_InterestRateSwapMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DerivativeInstrumentRiskAxis=cac_ForwardStartingInterestRateSwapMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DerivativeInstrumentRiskAxis=us-gaap_ForwardContractsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DerivativeInstrumentRiskAxis=cac_CancellableCommitmentMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_VariableRateAxis=cac_Federalhomeloanbank30dayMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_EquitySecuritiesByIndustryAxis=us-gaap_CommercialAndIndustrialSectorMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | cac_DerivativesByDerivativeInstrumentContractAxis=cac_ContractTwoMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | cac_DerivativesByDerivativeInstrumentContractAxis=cac_ContractOneMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |