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Accounting Policies - Summary of Computation of Basic and Diluted Earnings Per Share (Detail) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Basic earnings per share
Net income	$ 6,602	$ 4,288	$ 18,309	$ 14,374
Less: Preferred stock dividends		31	42	94
Net income available to common shareholders	$ 6,602	$ 4,257	$ 18,267	$ 14,280
Weighted average common shares outstanding	21,538,752	17,408,964	19,252,295	15,044,129
Basic Earnings Per Share	$ 0.31	$ 0.24	$ 0.95	$ 0.95
Diluted earnings per share
Net income available to common shareholders	$ 6,602	$ 4,257	$ 18,267	$ 14,280
Effect of dilutive securities:
Warrants		321,888		436,044
Weighted average shares outstanding	21,651,953	17,839,882	19,346,376	15,580,711
Diluted Earnings Per Share	$ 0.30	$ 0.24	$ 0.94	$ 0.92
Restricted Stock [Member]
Effect of dilutive securities:
Effect of dilutive securities	33,650	50,207	27,590	46,092
Stock Options [Member]
Effect of dilutive securities:
Effect of dilutive securities	79,551	58,823	66,491	54,446

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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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