XML 108 R93.htm IDEA: XBRL DOCUMENT v3.25.0.1

Commitments and Contingencies (Summary of Contractual and Notional Amounts of Financial Instruments) (Details) - USD ($) $ in Thousands	Dec. 31, 2024	Dec. 31, 2023
Financial Instruments [Line Items]
Contractual Amounts Of Financial Instrument	$ 779,212	$ 712,717
Commitments to Extend Credit [Member]
Financial Instruments [Line Items]
Contractual Amounts Of Financial Instrument	774,659	706,719
Standby Letters of Credit [Member]
Financial Instruments [Line Items]
Contractual Amounts Of Financial Instrument	$ 4,553	$ 5,998

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

Financial Instruments [Line Items]

+ References

No definition available.

+ Details

Name:	cac_FinancialInstrumentsLineItems
Namespace Prefix:	cac_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

X

- Details

Name:	us-gaap_FinancialInstrumentAxis=us-gaap_CommitmentsToExtendCreditMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_LongtermDebtTypeAxis=us-gaap_StandbyLettersOfCreditMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: