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Document And Entity Information - shares
 6 Months Ended
Jun. 30, 2015
Jul. 29, 2015
Document and Entity Information [Abstract]    
Entity Registrant Name FIRST CAPITAL INC  
Trading Symbol FCAP  
Document Type S-4  
Current Fiscal Year End Date --12-31  
Entity Common Stock, Shares Outstanding   2,759,002
Amendment Flag true  
Amendment Description Amendment No. 1 to the Registration Statement on Form S-4.  
Entity Central Index Key 0001070296  
Entity Current Reporting Status Yes  
Entity Voluntary Filers No  
Entity Filer Category Smaller Reporting Company  
Entity Well-known Seasoned Issuer No  
Document Period End Date Jun. 30, 2015  
Document Fiscal Period Focus Q2