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Earnings per Common Share - Computation of Basic and Diluted Earnings per Common Share (Detail) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
Basic
Net Income	$ 4,635	$ 4,725
Preferred stock dividends	319	391
Net income available to common shareholders - basic	$ 4,316	$ 4,334
Weighted average common shares outstanding - basic	9,100,330	7,845,768
Basic earnings per common share	$ 0.47	$ 0.55
Diluted
Net income available to common shareholders - basic	$ 4,316	$ 4,334
Preferred stock dividends	319	391
Net income available to common shareholders - diluted	$ 4,635	$ 4,725
Weighted average common shares outstanding for basic earnings per common share basic	9,100,330	7,845,768
Add: Dilutive effects of convertible preferred shares	2,508,003	3,078,245
Average shares and dilutive potential common shares outstanding - diluted	11,608,333	10,924,013
Diluted earnings per common share	$ 0.40	$ 0.43

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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 convertible preferred stock using the if-converted method.

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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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