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Summary of Significant Accounting Policies (Schedule of Basic and Diluted Earnings Per Common Share) (Details) - USD ($)
$ / shares in Units, $ in Thousands
12 Months Ended
Dec. 31, 2017
Dec. 31, 2016
Dec. 31, 2015
Basic EPS      
Net income available to common shareholders $ 45,972 $ 27,334 $ 26,431
Shares (denominator) 25,210,606 19,964,727 19,767,470
Basic EPS $ 1.82 $ 1.37 $ 1.34
Effect of Dilutive Securities Income (numerator) $ 175 $ 233
Effect of Dilutive Securities Shares (denominator) 80,776 768,190 732,257
Diluted EPS per common share      
Income (numerator) $ 45,972 $ 27,509 $ 26,664
Shares (denominator) 25,291,382 20,732,917 20,499,727
Diluted EPS per common share $ 1.82 $ 1.33 $ 1.30