Supplemental Disclosure for Earnings Per Share (Earnings Per Share Information) (Detail) (USD $) In Thousands, except Share data, unless otherwise specified	3 Months Ended		6 Months Ended
	Mar. 31, 2015	Mar. 31, 2014	Mar. 31, 2015	Mar. 31, 2014
Earnings:
Net income	$ 1,527	$ 1,536	$ 2,727	$ 2,564
Less: Preferred stock dividends declared	(43)	(43)	(86)	(86)
Net Income Available to Common Shareholders	1,484	1,493	2,641	2,478
Shares:
Weighted average common shares outstanding	2,138,931	2,140,414	2,125,369	2,149,426
Net income per common share, basic	$ 0.69	$ 0.70	$ 1.24	$ 1.15
Earnings:
Net income	1,527	1,536	2,727	2,564
Less: Preferred stock dividends declared	(43)	(43)	(86)	(86)
Net income available to common shareholders	$ 1,484	$ 1,493	$ 2,641	$ 2,478
Shares:
Weighted average common shares outstanding	2,138,931	2,140,414	2,125,369	2,149,426
Add: Dilutive effect of outstanding options	96,436	93,337	96,967	91,359
Add: Dilutive effect of nonvested restricted stock	10,004	15,210	9,238	14,214
Weighted average common shares outstanding as adjusted	2,245,371	2,248,961	2,231,574	2,254,999
Net income per common share, diluted	$ 0.66	$ 0.66	$ 1.18	$ 1.10