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Earnings Per Common Share (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Numerator:
Net income available to common shareholders	$ 4,250	$ 3,433	$ 10,965	$ 9,745
Denominator:
Weighted-average common shares outstanding - basic	7,281,594	6,322,073	6,905,017	6,299,009
Common stock equivalents	386,882	418,678	386,147	403,466
Weighted-average common shares outstanding - diluted	7,668,476	6,740,751	7,291,164	6,702,475
Earnings per common share:
Basic	$ 0.58	$ 0.54	$ 1.59	$ 1.55
Diluted	$ 0.55	$ 0.51	$ 1.50	$ 1.45

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Denominator of earnings per share.

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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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