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Earnings Per Share (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015
Earnings Per Share [Abstract]
Net income	$ 10,806	$ 8,399
Basic weighted average shares (in shares)	53,061,058	54,083,897
Effect of dilutive stock options and restricted stock (in shares)	369,045	556,492
Diluted weighted average shares (in shares)	53,430,103	54,640,389
Basic (usd per share)	$ 0.20	$ 0.16
Diluted (usd per share)	$ 0.20	$ 0.15
Anti-dilutive shares (in shares)	481,572	124,114

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Securities (including those issuable pursuant to contingent stock agreements) that could potentially dilute basic earnings per share (EPS) or earnings per unit (EPU) in the future that were not included in the computation of diluted EPS or EPU because to do so would increase EPS or EPU amounts or decrease loss per share or unit amounts for the period presented.

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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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