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Consolidated Statements of Income and Comprehensive Income (Unaudited) (Parenthetical) - USD ($)
$ in Thousands
9 Months Ended
Sep. 30, 2017
Sep. 30, 2016
Income Statement [Abstract]    
Interest and fees on loans (tax-exempt income) $ 589 $ 487
Interest and dividends on investments (tax-exempt income) $ 4,890 $ 3,761