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Document And Entity Information - USD ($)
 12 Months Ended
Dec. 31, 2020
Feb. 28, 2021
Jun. 30, 2020
Document and Entity Information      
Document Type 10-K    
Document Annual Report true    
Document Period End Date Dec. 31, 2020    
Document Transition Report false    
Entity File Number 000-23423    
Entity Registrant Name C & F FINANCIAL CORPORATION    
Entity Incorporation, State or Country Code VA    
Entity Tax Identification Number 54-1680165    
Entity Address, Address Line One 3600 La Grange Parkway    
Entity Address, City or Town Toano    
Entity Address, State or Province VA    
Entity Address, Postal Zip Code 23168    
City Area Code 804    
Local Phone Number 843-2360    
Title of 12(b) Security Common Stock, $1.00 par value per share    
Trading Symbol CFFI    
Security Exchange Name NASDAQ    
Entity Well-known Seasoned Issuer No    
Entity Voluntary Filers No    
Entity Current Reporting Status Yes    
Entity Interactive Data Current Yes    
Entity Filer Category Accelerated Filer    
Entity Small Business true    
Entity Emerging Growth Company false    
ICFR Auditor Attestation Flag true    
Entity Shell Company false    
Entity Public Float     $ 114,205,770
Entity Common Stock, Shares Outstanding   3,684,221  
Entity Central Index Key 0000913341    
Current Fiscal Year End Date --12-31    
Document Fiscal Year Focus 2020    
Document Fiscal Period Focus FY    
Amendment Flag false