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OREO (Tables) | 12 Months Ended
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Dec. 31, 2021
OREO |
Changes in the balance for OREO | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | Year Ended December 31, |
(Dollars in thousands) |  | 2021 |  | 2020 |
Balance at the beginning of year, gross | ​ | $ | 1,114 | ​ | $ | 1,191 | ​
Additions | ​ |  | — | ​ |  | 344 | ​
Charge-offs | ​ |  | (54) | ​ |  | (57) | ​
Sales proceeds | ​ |  | (462) | ​ |  | (364) | ​
Gain on disposition | ​ |  | 237 | ​ |  | — | ​
Balance at the end of year, gross | ​ |  | 835 | ​ |  | 1,114 | ​
Less valuation allowance | ​ |  | — | ​ |  | (207) | ​
Balance at the end of year, net | ​ | $ | 835 | ​ | $ | 907 | ​
Changes in the allowance for OREO | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | Year Ended December 31, |
(Dollars in thousands) |  | 2021 |  | 2020 |  | 2019 |
Balance at the beginning of year | ​ | $ | 207 | ​ | $ | 88 | ​ | $ | 57 | ​
Provision for losses | ​ |  | (153) | ​ |  | 176 | ​ |  | 31 | ​
Charge-offs, net | ​ |  | (54) | ​ |  | (57) | ​ |  | — | ​
Balance at the end of year | ​ | $ | — | ​ | $ | 207 | ​ | $ | 88 | ​

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- Definition Tabular disclosure of changes in the allowance for other real estate owned (OREO) losses from the beginning of the period to the end of the period. + References No definition available. + Details
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Namespace Prefix: | cffi_
Data Type: | dtr-types:textBlockItemType
Balance Type: | na
Period Type: | duration

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- Definition Tabular disclosure of the change in other real estate on properties owned. Excludes real estate assets taken in settlement of troubled loans through surrender or foreclosure by banks. + References No definition available. + Details
Name: | us-gaap_OtherRealEstateRollForwardTableTextBlock
Namespace Prefix: | us-gaap_
Data Type: | dtr-types:textBlockItemType
Balance Type: | na
Period Type: | duration

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- References No definition available. + Details
Name: | us-gaap_RealEstateOwnedDisclosureOfDetailedComponentsAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration