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Leases Leases (Additional Information) (Details)	Dec. 31, 2024 employee
Leases [Abstract]
Lessor, Operating Lease, Number of Landlords	2

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- Definition

Lessor, Operating Lease, Number of Landlords

+ References

No definition available.

+ Details

Name:	cac_LessorOperatingLeaseNumberOfLandlords
Namespace Prefix:	cac_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	instant

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- References

No definition available.

+ Details

Name:	us-gaap_LeasesAbstract
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration