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Supplemental Disclosure for Earnings Per Share (Detail) (USD $)
In Thousands, except Share data, unless otherwise specified
 3 Months Ended 9 Months Ended
Sep. 30, 2013
Sep. 30, 2012
Sep. 30, 2013
Sep. 30, 2012
Earnings:        
Net income attributable to First Capital, Inc. $ 1,426 $ 719 $ 3,830 $ 2,673
Shares:        
Weighted average common shares outstanding 2,784,560 2,785,001 2,784,849 2,785,383
Net income attributable to First Capital, Inc. per common share, basic and diluted $ 0.51 $ 0.26 $ 1.38 $ 0.96