Earnings Per Common Share (Computation of Basic and Diluted Earnings Per Share) (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended																12 Months Ended
	Dec. 31, 2017	[1]	Sep. 30, 2017	[1]	Jun. 30, 2017	[1]	Mar. 31, 2017	[1]	Dec. 31, 2016	[1]	Sep. 30, 2016	[1]	Jun. 30, 2016	[1]	Mar. 31, 2016	[1]	Dec. 31, 2017	Dec. 31, 2016
Earnings Per Common Share [Abstract]
Net income available to common stockholders, Income																	$ 7,946	$ 4,979
Income available to common stockholders after assumed conversions, Income																	$ 7,946	$ 4,979
Net income available to common stockholders, Shares																	4,260,137	3,186,079
Effect of potential dilutive common stock equivalents– stock options and restricted shares, Shares																	30,000	33,000
Income available to common stockholders after assumed conversions, Shares																	4,290,070	3,218,884
Net Income available to common stockholders, Amount	$ 0.19		$ 0.57		$ 0.54		$ 0.57		$ 0.62		$ 0.00		$ 0.39		$ 0.55		$ 1.87	$ 1.56
Effect of potential dilutive common stock equivalents– stock options and restricted shares, Amount																	(0.02)	(0.01)
Income available to common stockholders after assumed conversions, Amount	$ 0.19		$ 0.56		$ 0.53		$ 0.57		$ 0.62		$ 0.00		$ 0.39		$ 0.54		$ 1.85	$ 1.55

[1] Earnings per share is computed independently for each period shown. As a result, the sum of the quarters may not equal the total earnings per share for the year.