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Selected Quarterly Financial Data (unaudited): Selected financial data (Details) (USD $) In Thousands, except Per Share data, unless otherwise specified | 3 Months Ended | 12 Months Ended
--- | --- | ---
Sep. 30, 2013 | Jun. 30, 2013 | Mar. 31, 2013 | Dec. 31, 2012 | Sep. 30, 2012 | Jun. 30, 2012 | Mar. 31, 2012 | Dec. 31, 2011 | Sep. 30, 2013 | Sep. 30, 2012 | Sep. 30, 2011
Quarterly Financial Information Disclosure [Abstract] |  |  |  |  |  |  |  |  |  |  |
Interest and dividend income | $ 7,521 | $ 7,575 | $ 7,552 | $ 7,589 | $ 7,750 | $ 8,019 | $ 7,804 | $ 8,032 |  |  |
Interest expense | (1,052) | (1,076) | (1,111) | (1,200) | (1,294) | (1,391) | (1,531) | (1,731) | (4,439) | (5,947) | (8,533)
Net interest income | 6,469 | 6,499 | 6,441 | 6,389 | 6,456 | 6,628 | 6,273 | 6,301 | 25,798 | 25,658 | 25,433
Provision for loan losses | (165) | (1,385) | (1,175) | (200) | (900) | (900) | (1,050) | (650) | (2,925) | (3,500) | (6,758)
Non-interest income | 2,397 | 2,372 | 2,778 | 2,715 | 2,503 | 2,341 | 2,493 | 2,444 | 10,262 | 9,781 | 8,681
Non-interest expense | (7,066) | (6,237) | (6,184) | (6,377) | (6,678) | (6,097) | (6,572) | (6,221) | (25,864) | (25,568) | (25,963)
Income before income taxes | 1,635 | 1,249 | 1,860 | 2,527 | 1,381 | 1,972 | 1,144 | 1,874 |  |  |
Provision for federal income taxes | 740 | 373 | 582 | 819 | 230 | 624 | 336 | 591 | 2,514 | 1,781 | 304
Net income | 895 | 876 | 1,278 | 1,708 | 1,151 | 1,348 | 808 | 1,283 | 4,757 | 4,590 | 1,089
Preferred stock dividends | (151) | (151) | (207) | (201) | (208) | (208) | (208) | (208) | (710) | (832) | (832)
Preferred stock accretion | (47) | (47) | (126) | (63) | (61) | (61) | (59) | (59) | (283) | (240) | (225)
Repurchase of preferred stock at a discount | 0 | 0 | 255 | 0 |  |  |  |  | 255 | 0 | 0
Net income to common shareholders | $ 697 | $ 678 | $ 1,200 | $ 1,444 | $ 882 | $ 1,079 | $ 541 | $ 1,016 | $ 4,019 | $ 3,518 | $ 32
Net income per common share |  |  |  |  |  |  |  |  |  |  |
Basic (in dollars per share) | $ 0.10 | $ 0.10 | $ 0.18 | $ 0.21 | $ 0.13 | $ 0.16 | $ 0.08 | $ 0.15 | $ 0.59 | $ 0.52 | $ 0.00
Diluted (in dollars per share) | $ 0.10 | $ 0.10 | $ 0.17 | $ 0.21 | $ 0.13 | $ 0.16 | $ 0.08 | $ 0.15 | $ 0.58 | $ 0.52 | $ 0.00

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