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Summary of Significant Accounting Policies - Nature of Operations and Significant Group Concentration of Credit Risk (Details) | 12 Months Ended
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Dec. 31, 2019 subsidiary
Individual State Concentration Risk | Investment concentration risk | Obligations of states and political subdivisions |
Concentration risk |
Concentration risk, percentage | 12.80%
Individual State Concentration Risk | Investment concentration risk | Obligations of states and political subdivisions | Minimum |
Concentration risk |
Concentration risk, threshold percentage | 10.00%
Individual Issuer Concentration Risk | Loan Portfolio Concentration Risk | Obligations of states and political subdivisions |
Concentration risk |
Concentration risk, percentage | 4.60%
Category of loan concentration risk | Loan Portfolio Concentration Risk | Commercial, financial and agricultural |
Concentration risk |
Concentration risk, percentage | 44.90%
Category of loan concentration risk | Loan Portfolio Concentration Risk | Non-prime consumer finance loans |
Concentration risk |
Concentration risk, percentage | 25.90%
C&F Bank |
Concentration risk |
Number of wholly owned subsidiaries | 5
C&F Mortgage | C&F Select LLC |
Concentration risk |
Interest owned (as a percent) | 51.00%

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