Supplemental Disclosure for Earnings Per Share (Detail) (USD $) In Thousands, except Share data, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2012	Sep. 30, 2011	Sep. 30, 2012	Sep. 30, 2011
Earnings:
Net income attributable to First Capital, Inc.	$ 719	$ 1,093	$ 2,673	$ 2,930
Shares:
Weighted average common shares outstanding	2,785,001	2,785,693	2,785,383	2,786,652
Net income attributable to First Capital, Inc. per common share, basic and diluted	$ 0.26	$ 0.39	$ 0.96	$ 1.05