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Earnings Per Share (Details)	3 Months Ended
	Mar. 31, 2013	Mar. 31, 2012
Schedule Of Weighted Average Number Of Shares Outstanding Basic To Diluted
Basic shares outstanding	98,876,000	97,039,000
Effect of potential common stock
Common stock awards	892,000	1,140,000
Senior subordinated convertible notes	218,000	1,128,000
Diluted shares outstanding	99,986,000	99,307,000
Antidilutive stock options	568,850	454,165

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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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Additional shares included in the calculation of diluted EPS as a result of the potentially dilutive effect of convertible debt securities using the if-converted method.

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