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Summary of Significant Accounting Policies - Schedule of Earnings Per Share, Basic and Diluted (Details) - USD ($)
$ / shares in Units, $ in Thousands
 12 Months Ended
Dec. 31, 2018
Dec. 31, 2017
Dec. 31, 2016
Accounting Policies [Abstract]      
Net earnings available to common shareholders $ 10,426 $ 4,369 $ 8,961
Weighted average common shares outstanding - basic 4,350,671 4,268,556 4,196,949
Assumed exercise of stock options 15,151 74,172 71,996
Weighted average common shares outstanding - diluted 4,365,822 4,342,728 4,268,945
Basic [1] $ 2.40 $ 1.02 $ 2.13
Diluted [1] $ 2.39 $ 1.01 $ 2.10
[1] All per share amounts have been adjusted to give effect to the 5% stock dividends paid during December 2018, 2017 and 2016.