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: |