Earnings Per Share (Schedule of Earnings per Share) (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended
Mar. 31, 2018	Mar. 31, 2017
Basic Earnings Per Share
Net income	$ 4,007	$ 3,206
Weighted-Average Shares number of common shares, basic	7,810,916	7,332,455
Earnings per share, basic	$ 0.51	$ 0.44
Diluted Earnings Per Share
Net income available and assumed conversions	$ 4,007	$ 3,206
Weighted-Average Shares, effect of dilutive securities stock option	154,977	148,026
Weighted-Average Shares income available to common stockholders and assumed conversions, diluted	7,965,893	7,480,481
Earnings per share, diluted	$ 0.50	$ 0.43

The amount of net income (loss) for the period per each share of common stock or unit outstanding during the reporting period.

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The amount of net income (loss) for the period available to each share of common stock or common unit outstanding during the reporting period and to each share or unit that would have been outstanding assuming the issuance of common shares or units for all dilutive potential common shares or units outstanding during the reporting period.

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The portion of profit or loss for the period, net of income taxes, which is attributable to the parent.

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Amount, after deduction of tax, noncontrolling interests, dividends on preferred stock and participating securities, and addition from assumption of issuance of common shares for dilutive potential common shares; of income (loss) available to common shareholders.

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The sum of dilutive potential common shares or units used in the calculation of the diluted per-share or per-unit computation.

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The average number of shares or units issued and outstanding that are used in calculating diluted EPS or earnings per unit (EPU), determined based on the timing of issuance of shares or units in the period.

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