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Summary of Significant Accounting Policies - Nature of Operations and Business Combination (Details) $ in Thousands	Jan. 01, 2020 USD ($)	Sep. 30, 2021 subsidiary
Peoples Bankshares, Incorporated (Peoples)
Nature of Operations
Aggregate purchase price | $	$ 22,191
C&F Bank
Nature of Operations
Number of wholly owned subsidiaries | subsidiary		5
C&F Mortgage | C&F Select LLC
Nature of Operations
Interest owned (as a percent)		51.00%

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