Earnings Per 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
Basic EPS
Net income	$ 5,983	$ 5,376	$ 17,476	$ 15,194
Weighted average shares outstanding	27,654,020	27,260,584	27,436,931	27,167,720
Basic earnings per share	$ 0.22	$ 0.20	$ 0.64	$ 0.56
Diluted EPS
Net income	$ 5,983	$ 5,376	$ 17,476	$ 15,194
Weighted average shares outstanding	27,654,020	27,260,584	27,436,931	27,167,720
Dilutive effect of restricted stock awards	43,890	24,692	55,454	18,583
Weighted average shares for diluted earnings per share	27,697,910	27,285,276	27,492,385	27,186,303
Diluted earnings per share	$ 0.22	$ 0.20	$ 0.64	$ 0.56

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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The portion of profit or loss for the period, net of income taxes, which is attributable to the parent.

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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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