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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, 2014 | Sep. 30, 2013 | Sep. 30, 2012
Quarterly Financial Information Disclosure [Abstract] |  |  |  |  |  |  |  |  |  |  |
Interest and dividend income | $ 7,567 | $ 7,397 | $ 7,412 | $ 7,481 | $ 7,521 | $ 7,575 | $ 7,552 | $ 7,589 |  |  |
Interest expense | (978) | (964) | (975) | (1,022) | (1,052) | (1,076) | (1,111) | (1,200) | (3,939) | (4,439) | (5,947)
Net interest income | 6,589 | 6,433 | 6,437 | 6,459 | 6,469 | 6,499 | 6,441 | 6,389 | 25,918 | 25,798 | 25,658
Provision for loan losses |  |  |  |  | 165 | 1,385 | 1,175 | 200 | 0 | (2,925) | (3,500)
Non-interest income | 2,206 | 2,116 | 2,013 | 2,195 | 2,397 | 2,372 | 2,778 | 2,715 | 8,530 | 10,262 | 9,781
Non-interest expense | 6,373 | 6,430 | 6,754 | 6,241 | 7,066 | 6,237 | 6,184 | 6,377 | (25,798) | (25,864) | (25,568)
Income before income taxes | 2,422 | 2,119 | 1,696 | 2,413 | 1,635 | 1,249 | 1,860 | 2,527 |  |  |
Provision for federal income taxes | 776 | 685 | 537 | 802 | 740 | 373 | 582 | 819 | 2,800 | 2,514 | 1,781
Net income | 1,646 | 1,434 | 1,159 | 1,611 | 895 | 876 | 1,278 | 1,708 | 5,850 | 4,757 | 4,590
Preferred stock dividends | 0 | 0 | 0 | 136 | 151 | 151 | 207 | 201 | (136) | (710) | (832)
Preferred stock accretion | 0 | 0 | 0 | 70 | 47 | 47 | 126 | 63 | (70) | (283) | (240)
Repurchase of preferred stock at a discount |  |  |  |  |  |  |  |  | 0 | 255 | 0
Net income to common shareholders | $ 1,646 | $ 1,434 | $ 1,159 | $ 1,405 |  |  |  |  | $ 5,644 | $ 4,019 | $ 3,518
Net income per common share |  |  |  |  |  |  |  |  |  |  |
Basic (in dollars per share) | $ 0.24 | $ 0.21 | $ 0.17 | $ 0.20 |  |  |  |  | $ 0.82 | $ 0.59 | $ 0.52
Diluted (in dollars per share) | $ 0.23 | $ 0.20 | $ 0.16 | $ 0.20 | $ 0.10 | $ 0.10 | $ 0.18 | $ 0.21 | $ 0.80 | $ 0.58 | $ 0.52

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