XML 70 R58.htm IDEA: XBRL DOCUMENT v3.25.1

LOANS AND ALLOWANCE FOR CREDIT LOSSES ON LOANS (Activity in Allowance for Credit Losses on Loans by Portfolio Segment) (Details) - USD ($) $ in Thousands		3 Months Ended		12 Months Ended
	Jan. 02, 2025	Mar. 31, 2025	Mar. 31, 2024	Dec. 31, 2024	Dec. 31, 2023
Financing Receivable, Allowance for Credit Loss [Line Items]
Acquired PCD loans(1)		$ 3,071
Provision for acquired non-PCD loans	$ 6,300	6,293
General provision (credit) for loan losses		2,580
Financing Receivable, Allowance for Credit Loss, Excluding Accrued Interest		46,723	$ 35,613	$ 35,728	$ 36,935
Financing Receivable, Excluding Accrued Interest, Allowance for Credit Loss, Writeoff		(1,120)	(345)	(1,883)
Financing Receivable, Excluding Accrued Interest, Allowance for Credit Loss, Recovery		171	187	623
Financing Receivable, Excluding Accrued Interest, Credit Loss Expense (Reversal), Loans Only		8,873	(1,164)	53
Commercial real estate - non-owner-occupied
Financing Receivable, Allowance for Credit Loss [Line Items]
Acquired PCD loans(1)		1,659
Provision for acquired non-PCD loans		2,335
General provision (credit) for loan losses		60
Financing Receivable, Allowance for Credit Loss, Excluding Accrued Interest		18,952	15,294	14,897	16,581
Financing Receivable, Excluding Accrued Interest, Allowance for Credit Loss, Writeoff		0	0	0
Financing Receivable, Excluding Accrued Interest, Allowance for Credit Loss, Recovery		1	7	10
Financing Receivable, Excluding Accrued Interest, Credit Loss Expense (Reversal), Loans Only		2,395	(1,294)	(1,694)
Commercial real estate - owner-occupied
Financing Receivable, Allowance for Credit Loss [Line Items]
Acquired PCD loans(1)		340
Provision for acquired non-PCD loans		840
General provision (credit) for loan losses		671
Financing Receivable, Allowance for Credit Loss, Excluding Accrued Interest		4,192	2,230	2,481	2,290
Financing Receivable, Excluding Accrued Interest, Allowance for Credit Loss, Writeoff		(191)	0	0
Financing Receivable, Excluding Accrued Interest, Allowance for Credit Loss, Recovery		51	0	0
Financing Receivable, Excluding Accrued Interest, Credit Loss Expense (Reversal), Loans Only		1,511	(60)	191
Commercial
Financing Receivable, Allowance for Credit Loss [Line Items]
Acquired PCD loans(1)		575
Provision for acquired non-PCD loans		816
General provision (credit) for loan losses		(326)
Financing Receivable, Allowance for Credit Loss, Excluding Accrued Interest		6,135	4,460	5,856	4,869
Financing Receivable, Excluding Accrued Interest, Allowance for Credit Loss, Writeoff		(896)	(309)	(1,784)
Financing Receivable, Excluding Accrued Interest, Allowance for Credit Loss, Recovery		110	92	455
Financing Receivable, Excluding Accrued Interest, Credit Loss Expense (Reversal), Loans Only		490	(192)	2,316
Residential real estate
Financing Receivable, Allowance for Credit Loss [Line Items]
Acquired PCD loans(1)		305
Provision for acquired non-PCD loans		1,979
General provision (credit) for loan losses		1,607
Financing Receivable, Allowance for Credit Loss, Excluding Accrued Interest		13,872	10,565	9,979	10,254
Financing Receivable, Excluding Accrued Interest, Allowance for Credit Loss, Writeoff		(4)	0	0
Financing Receivable, Excluding Accrued Interest, Allowance for Credit Loss, Recovery		6	6	26
Financing Receivable, Excluding Accrued Interest, Credit Loss Expense (Reversal), Loans Only		3,586	305	(301)
Home equity
Financing Receivable, Allowance for Credit Loss [Line Items]
Acquired PCD loans(1)		165
Provision for acquired non-PCD loans		268
General provision (credit) for loan losses		589
Financing Receivable, Allowance for Credit Loss, Excluding Accrued Interest		3,416	2,360	2,397	2,217
Financing Receivable, Excluding Accrued Interest, Allowance for Credit Loss, Writeoff		(3)	0	(1)
Financing Receivable, Excluding Accrued Interest, Allowance for Credit Loss, Recovery		0	80	98
Financing Receivable, Excluding Accrued Interest, Credit Loss Expense (Reversal), Loans Only		857	63	83
Consumer
Financing Receivable, Allowance for Credit Loss [Line Items]
Acquired PCD loans(1)		27
Provision for acquired non-PCD loans		55
General provision (credit) for loan losses		(21)
Financing Receivable, Allowance for Credit Loss, Excluding Accrued Interest		156	704	118	$ 724
Financing Receivable, Excluding Accrued Interest, Allowance for Credit Loss, Writeoff		(26)	(36)	(98)
Financing Receivable, Excluding Accrued Interest, Allowance for Credit Loss, Recovery		3	2	34
Financing Receivable, Excluding Accrued Interest, Credit Loss Expense (Reversal), Loans Only		$ 34	$ 14	$ (542)

X

- Definition

Financing Receivable, Excluding Accrued Interest, Credit Loss Expense (Reversal), Excluding Loans Acquired Through Business Combination

+ References

No definition available.

+ Details

Name:	cac_FinancingReceivableExcludingAccruedInterestCreditLossExpenseReversalExcludingLoansAcquiredThroughBusinessCombination
Namespace Prefix:	cac_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

X

- Definition

Financing Receivable, Excluding Accrued Interest, Credit Loss Expense (Reversal), General, Loans Only

+ References

No definition available.

+ Details

Name:	cac_FinancingReceivableExcludingAccruedInterestCreditLossExpenseReversalGeneralLoansOnly
Namespace Prefix:	cac_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

X

- Definition

Financing Receivable, Excluding Accrued Interest, Credit Loss Expense (Reversal), Loans Only

+ References

No definition available.

+ Details

Name:	cac_FinancingReceivableExcludingAccruedInterestCreditLossExpenseReversalLoansOnly
Namespace Prefix:	cac_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

X

- Definition

Amount excluding accrued interest, of allowance for credit loss on financing receivable. Excludes net investment in lease.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 326
-SubTopic 20
-Name Accounting Standards Codification
-Section 45
-Paragraph 1
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479344/326-20-45-1

+ Details

Name:	us-gaap_FinancingReceivableAllowanceForCreditLossExcludingAccruedInterest
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

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

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Name Regulation S-K (SK)
-Number 229
-Section 1405
-Paragraph c
-Publisher SEC

Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 326
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 13
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479319/326-20-50-13

+ Details

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

X

- Definition

Amount, excluding accrued interest, of increase in allowance for credit loss on financing receivable from recovery. Excludes net investment in lease.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 326
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 13
-Subparagraph (e)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479319/326-20-50-13

+ Details

Name:	us-gaap_FinancingReceivableExcludingAccruedInterestAllowanceForCreditLossRecovery
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

X

- Definition

Amount, excluding accrued interest, of decrease in allowance for credit loss on financing receivable from writeoff. Excludes net investment in lease.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 326
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 6
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479319/326-20-50-6

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Topic 326
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 13
-Subparagraph (d)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479319/326-20-50-13

+ Details

Name:	us-gaap_FinancingReceivableExcludingAccruedInterestAllowanceForCreditLossWriteoff
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

X

- Definition

Amount of allowance for credit loss at acquisition date of financing receivable purchased with credit deterioration.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 326
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 19
-Subparagraph (b)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479319/326-20-50-19

+ Details

Name:	us-gaap_FinancingReceivablePurchasedWithCreditDeteriorationAllowanceForCreditLossAtAcquisitionDate
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

X

- Details

Name:	us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis=cac_CommercialRealEstatePortfolioSegmentNonOwnerOccupiedMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis=cac_CommercialRealEstatePortfolioSegmentOwnerOccupiedMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis=us-gaap_CommercialPortfolioSegmentMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis=us-gaap_ResidentialPortfolioSegmentMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis=cac_HomeEquityPortfolioSegmentMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis=us-gaap_ConsumerPortfolioSegmentMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: