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Earnings Per Share (Details) (USD $) In Thousands, except Share data, unless otherwise specified	3 Months Ended
	Mar. 31, 2014	Mar. 31, 2013
Basic
Net income	$ 5,811	$ 6,032
Weighted-average common shares outstanding	11,478,116	11,422,028
Basic earnings per share	$ 0.51	$ 0.53
Diluted
Net Income	$ 5,811	$ 6,032
Weighted-average common shares outstanding	11,478,116	11,422,028
Effect of dilutive restricted stock, stock options and stock appreciation rights	194,707	174,866
Weighted-average common shares outstanding assuming dilution	11,672,823	11,596,894
Diluted earnings per share	$ 0.50	$ 0.52

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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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