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Employee Benefit Plans - Defined Benefit Plans - Projected Benefit Obligations, Plan Assets, Funded Status and Rate Assumptions (Details) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Change in benefit obligation      
Actuarial loss $ 3,000    
Amounts recognized in accumulated other comprehensive loss      
Total recognized in accumulated other comprehensive loss 4,985 $ 3,740  
Weighted-average assumptions for benefit obligation at valuation date      
Accumulated benefit obligation 24,640 20,790  
C&F Bank | Cash Balance Plan      
Change in benefit obligation      
Projected benefit obligation, beginning 20,794 17,205  
Service cost 1,603 1,218 $ 1,232
Interest cost 551 609 521
Actuarial loss (2,996) (2,834)  
Benefits paid (1,301) (1,072)  
Projected benefit obligation, ending 24,643 20,794 17,205
Change in plan assets      
Fair value of plan assets, beginning 22,806 20,156  
Actual return on plan assets 2,782 3,722  
Employer contributions 2,000    
Benefits paid (1,301) (1,072)  
Fair value of plan assets, ending 26,287 22,806 $ 20,156
Funded status 1,644 2,012  
Amounts recognized as an other asset 1,644 2,012  
Amounts recognized in accumulated other comprehensive loss      
Net loss 6,748 5,239  
Prior service credits (438) (504)  
Deferred taxes (1,325) (995)  
Total recognized in accumulated other comprehensive loss $ 4,985 $ 3,740  
Weighted-average assumptions for benefit obligation at valuation date      
Discount rate. 2.10% 2.90%  
Rate of compensation increase 3.00% 3.00%  
Interest crediting rate 5.00% 5.00%