Shareholders’ Equity and Earnings Per Share - Earnings Per Share (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended
Mar. 31, 2017	Mar. 31, 2016
Reconciliation of factors used in computing basic and diluted earnings per common share
Net income available to common shareholders	$ 6,538	$ 5,602
Less: undistributed earnings allocated to Series C Preferred Stock		(403)
Distributed and undistributed earnings allocated to common shareholders	$ 6,538	$ 5,199
Weighted average common shares outstanding for basic earnings per common share (in shares)	37,957,999	32,125,716
Dilutive effect of stock options outstanding, using the treasury stock method (in shares)	536,108	251,777
Shares used in computing diluted earnings per common share (in shares)	38,494,107	32,377,493
Basic earnings per share (in dollars per share)	$ 0.17	$ 0.16
Diluted earnings per share (in dollars per share)	$ 0.17	$ 0.16

Net income or loss available to common stockholders less earnings allocated to participating securities.

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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 share based payment arrangements using the treasury stock method.

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Net income after adjustments for dividends on preferred stock (declared in the period) and/or cumulative preferred stock (accumulated for the period).

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Amount of undistributed earnings (loss) allocated to participating securities for the basic earnings (loss) per share or per unit calculation under the two-class method.

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The average number of shares or units issued and outstanding that are used in calculating diluted EPS or earnings per unit (EPU), determined based on the timing of issuance of shares or units in the period.

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Number of [basic] shares or units, after adjustment for contingently issuable shares or units and other shares or units not deemed outstanding, determined by relating the portion of time within a reporting period that common shares or units have been outstanding to the total time in that period.

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