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Earnings Per Common Share (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Basic earnings per common share
Net income	$ 3,649	$ 3,397
Less: earnings allocated to participating securities	54	45
Basic earnings allocated to common stockholders	$ 3,595	$ 3,352
Weighted-average common shares outstanding, excluding participating securities	8,633,278	8,600,620
Basic earnings per common share	$ 0.42	$ 0.39
Diluted earnings per common share
Earnings allocated to common stockholders	$ 3,595	$ 3,352
Weighted-average common shares outstanding, excluding participating securities	8,633,278	8,600,620
Weighted-average diluted common shares outstanding, excluding participating securities	8,633,278	8,600,620
Diluted earnings per common share	$ 0.42	$ 0.39

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- Definition

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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