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Shareholders' Equity - Earnings Per Share (Details) - USD ($) $ / shares in Units, $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Equity [Abstract]
Net income	$ 14,026	$ 15,182	$ 10,964
Income available to common shareholders	$ 14,026	$ 15,182	$ 10,964
Weighted average shares outstanding	12,472,095	11,331,166	10,931,927
Net income per common share (in dollars per share)	$ 1.12	$ 1.34	$ 1.00
Effect of dilutive stock options and warrants	250,255	104,283	83,836
Weighted average shares of common stock and common stock equivalents	12,722,350	11,435,449	11,015,763
Net income per diluted common share (in dollars per share)	$ 1.10	$ 1.33	$ 1.00
Antidilutive options and warrants excluded from computation of earnings per share	0	0	26,704

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Securities (including those issuable pursuant to contingent stock agreements) that could potentially dilute basic earnings per share (EPS) or earnings per unit (EPU) in the future that were not included in the computation of diluted EPS or EPU because to do so would increase EPS or EPU amounts or decrease loss per share or unit amounts for the period presented.

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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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Additional shares included in the calculation of diluted EPS as a result of the potentially dilutive effect of call options and warrants using the treasury stock method.

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Amount, after deduction of tax, noncontrolling interests, dividends on preferred stock and participating securities; of income (loss) available to common shareholders.

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