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Basis of Presentation (Details) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2014	Mar. 31, 2013
Basis of Presentation
Number of weeks in each fiscal quarter for 52-week fiscal year	91 days
Income (loss) per common share:
Basic weighted average shares outstanding	39,177	38,716
Dilutive effect of stock options and restricted stock (in shares)	760
Diluted weighted average shares outstanding	39,937	38,716

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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 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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