Earnings Per Share (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended
Mar. 31, 2016	Mar. 31, 2015
Basic
Net income	$ 5,833	$ 5,539
Weighted-average common shares outstanding	11,233,558	11,440,356
Basic earnings per share	$ .52	$ 0.48
Diluted
Net Income	$ 5,833	$ 5,539
Weighted-average common shares outstanding	11,233,558	11,440,356
Effect of dilutive restricted stock, stock options and stock appreciation rights	153,299	161,497
Weighted-average common shares outstanding assuming dilution	11,386,857	11,601,853
Diluted earnings per share	$ .51	$ 0.48

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

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The sum of dilutive potential common shares or units used in the calculation of the diluted per-share or per-unit computation.

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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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