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Equity, Other Comprehensive Income and Earnings Per Share - Earnings Per Share (Details) - USD ($) $ in Thousands	3 Months Ended				12 Months Ended
	Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Components of earnings per share calculations
Net income attributable to C&F Financial Corporation	$ 4,365	$ 4,880	$ 5,843	$ 3,771	$ 18,859	$ 18,020	$ 6,572
Weighted average shares outstanding—basic					3,450,745	3,501,221	3,486,510
Effect of dilutive securities—stock option awards							79
Weighted average number of shares used in earnings per share—assuming dilution					3,450,745	3,501,221	3,486,589

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