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Selected Quarterly Financial Data (Details) (USD $) In Thousands, except Per Share data, unless otherwise specified | 3 Months Ended | 12 Months Ended
--- | --- | ---
Dec. 31, 2013 | Sep. 30, 2013 | Jun. 30, 2013 | Mar. 31, 2013 | Dec. 31, 2013 | Dec. 31, 2012 | Dec. 31, 2011
Selected Quarterly Financial Data [Abstract] |  |  |  |  |  |  |
Interest and dividend income | $ 13,076 | $ 12,834 | $ 12,474 | $ 12,365 | $ 50,749 | $ 50,838 | $ 50,907
Interest expense | 2,731 | 2,865 | 2,991 | 3,076 | 11,663 | 13,867 | 16,518
Net interest income | 10,345 | 9,969 | 9,483 | 9,289 | 39,086 | 36,971 | 34,389
Provision for loan losses | 490 | 170 | 405 | 353 | 1,418 | 1,652 | 2,395
Non-interest income | 1,817 | 1,925 | 1,874 | 1,950 | 7,566 | 7,709 | 6,792
Non-interest expense | 7,123 | 6,835 | 6,595 | 6,307 | 26,860 | 25,618 | 23,281
Income before income taxes | 4,549 | 4,889 | 4,357 | 4,579 | 18,374 | 17,410 | 15,505
Income taxes | 1,285 | 1,356 | 1,187 | 1,363 | 5,191 | 4,944 | 4,462
Net income | $ 3,264 | $ 3,533 | $ 3,170 | $ 3,216 | $ 13,183 | $ 12,466 | $ 11,043
Basic earnings per share | $ 0.83 | $ 0.90 | $ 0.81 | $ 0.82 | $ 3.35 | $ 3.20 | $ 2.86
Diluted earnings per share | $ 0.82 | $ 0.89 | $ 0.80 | $ 0.82 | $ 3.34 | $ 3.18 | $ 2.85

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