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Supplemental Disclosure for Earnings Per Share (Detail) (USD $)
In Thousands, except Share data, unless otherwise specified
 3 Months Ended 6 Months Ended
Jun. 30, 2013
Jun. 30, 2012
Jun. 30, 2013
Jun. 30, 2012
Earnings:        
Net income attributable to First Capital, Inc. $ 1,210 $ 1,035 $ 2,404 $ 1,954
Shares:        
Weighted average common shares outstanding 2,784,997 2,785,458 2,784,997 2,785,574
Net income attributable to First Capital, Inc. per common share, basic and diluted $ 0.43 $ 0.37 $ 0.86 $ 0.70