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Selected Quarterly Financial Data (Unaudited) (Schedule of Selected Quarterly Financial Information) (Details) - USD ($) $ / shares in Units, $ in Thousands | 3 Months Ended | 12 Months Ended
--- | --- | ---
Dec. 31, 2016 | Sep. 30, 2016 | Jun. 30, 2016 | Mar. 31, 2016 | Dec. 31, 2016 | Dec. 31, 2015 | Dec. 31, 2014
Selected Quarterly Financial Data [Abstract] |  |  |  |  |  |  |
Interest and dividend income | $ 14,846 | $ 14,123 | $ 14,354 | $ 14,164 | $ 57,487 | $ 55,224 | $ 53,718
Interest expense | 3,189 | 3,124 | 2,972 | 2,828 | 12,113 | 10,390 | 9,905
Net interest income | 11,657 | 10,999 | 11,382 | 11,336 | 45,374 | 44,834 | 43,813
Provision for loan losses | 225 | 139 | 150 | 465 | 979 | 1,785 | 1,833
Non-interest income | 2,035 | 3,372 | 3,614 | 3,328 | 12,349 | 8,979 | 7,758
Non-interest expense | 10,457 | 8,750 | 8,731 | 7,997 | 35,935 | 30,908 | 29,211
Income before income taxes | 3,010 | 5,482 | 6,115 | 6,202 | 20,809 | 21,120 | 20,527
Income taxes | 426 | 1,850 | 1,804 | 1,796 | 5,876 | 5,967 | 5,914
Net income | $ 2,584 | $ 3,632 | $ 4,311 | $ 4,406 | $ 14,933 | $ 15,153 | $ 14,613
Basic earnings per share | $ 0.43 | $ 0.60 | $ 0.72 | $ 0.73 | $ 2.47 | $ 2.53 | $ 2.47
Diluted earnings per share | $ 0.42 | $ 0.59 | $ 0.71 | $ 0.72 | $ 2.45 | $ 2.50 | $ 2.45

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