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Employee Benefit Plans - Defined Benefit Plans - Projected Benefit Obligations, Plan Assets, Funded Status and Rate Assumptions (Details) - C&F Bank - Cash Balance Plan - USD ($)
 12 Months Ended
Dec. 31, 2024
Dec. 31, 2023
Dec. 31, 2022
Change in benefit obligation      
Projected benefit obligation, beginning $ 16,812,000 $ 15,267,000  
Service cost 1,414,000 1,377,000 $ 1,837,000
Interest cost 757,000 728,000 492,000
Actuarial (gain) loss 802,000 (527,000)  
Benefits paid (1,128,000) (1,087,000)  
Projected benefit obligation, ending 17,053,000 16,812,000 15,267,000
Change in plan assets      
Fair value of plan assets, beginning 19,588,000 18,356,000  
Actual return on plan assets 1,697,000 2,319,000  
Employer contributions 1,000,000    
Benefits paid (1,128,000) (1,087,000)  
Fair value of plan assets, ending 21,157,000 19,588,000 $ 18,356,000
Funded status 4,104,000 2,776,000  
Amounts recognized as an other asset 4,104,000 2,776,000  
Amounts recognized in accumulated other comprehensive loss      
Net loss 2,443,000 3,718,000  
Prior service credits (168,000) (235,000)  
Deferred taxes (478,000) (731,000)  
Total recognized in accumulated other comprehensive loss $ 1,797,000 $ 2,752,000  
Weighted-average assumptions for benefit obligation at valuation date      
Discount rate 5.40% 4.70%  
Rate of compensation increase 3.00% 3.00%  
Interest crediting rate 5.00% 5.00%  
Accumulated benefit obligation $ 17,050,000.00 $ 16,810,000