XML 57 R47.htm IDEA: XBRL DOCUMENT v3.25.1

Loans - Loan Modifications (Details) - USD ($)	3 Months Ended
	Mar. 31, 2025	Mar. 31, 2024
Accounts, Notes, Loans and Financing Receivable [Line Items]
Weighted average interest rate of modified financing receivables		1.51%
Weighted average extension term of modified financing receivables		6 years 10 months 24 days
Payment defaults of modified loans were modified during the previous twelve months	0	0
Residential mortgage
Accounts, Notes, Loans and Financing Receivable [Line Items]
Weighted average interest rate of modified financing receivables		1.51%
Weighted average extension term of modified financing receivables		6 years 10 months 24 days

X

- Definition

Number of financing receivable contracts modified as troubled debt restructuring within previous 12 months, with subsequent payment default.

+ References

No definition available.

+ Details

Name:	cffi_FinancingReceivableTroubledDebtRestructuringSubsequentDefaultNumberOfContracts2
Namespace Prefix:	cffi_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Weighted average extension term of modified financing receivables.

+ References

No definition available.

+ Details

Name:	cffi_FinancingReceivablesModifiedLoansWeightedAverageExtensionTerm
Namespace Prefix:	cffi_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Weighted average interest rate of modified financing receivables.

+ References

No definition available.

+ Details

Name:	cffi_FinancingReceivablesModifiedLoansWeightedAverageInterestRate
Namespace Prefix:	cffi_
Data Type:	dtr-types:percentItemType
Balance Type:	na
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/2009/role/commonPracticeRef
-Topic 310
-SubTopic 20
-Name Accounting Standards Codification
-Section 40
-Paragraph 7
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481628/310-20-40-7

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Topic 310
-SubTopic 10
-Name Accounting Standards Codification
-Section 45
-Paragraph 2
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481990/310-10-45-2

+ Details

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

X

- Details

Name:	us-gaap_FinancingReceivablePortfolioSegmentAxis=us-gaap_ResidentialMortgageMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: