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Employee Benefit Plans - Defined Benefit Plans - Components of Net Periodic Pension Costs (Details) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Components of net periodic benefit cost      
Net periodic benefit cost $ 793 $ 649 $ 403
C&F Bank | Cash Balance Plan      
Components of net periodic benefit cost      
Service cost, included in salaries and employee benefits 1,603 1,218 1,232
Interest cost 551 609 521
Expected return on plan assets (1,492) (1,297) (1,413)
Amortization of prior service credit (66) (68) (62)
Recognized net actuarial losses 197 187 125
Other components of net periodic benefit cost, included in other noninterest income (810) (569) (829)
Net periodic benefit cost $ 793 $ 649 $ 403