Earnings Per Share (Details)	3 Months Ended	9 Months Ended
Sep. 30, 2012	Sep. 30, 2011	Sep. 30, 2012	Sep. 30, 2011
Schedule Of Weighted Average Number Of Shares Outstanding Basic To Diluted
Basic shares outstanding	97,876,000	96,083,000	97,460,000	95,792,000
Effect of potential common stock
Common stock awards	1,017,000	1,157,000	1,077,000	1,242,000
Senior subordinated convertible notes	864,000	1,068,000	1,006,000	1,251,000
Diluted shares outstanding	99,757,000	98,308,000	99,543,000	98,285,000
Antidilutive stock options			540,266	589,666

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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+ Details

- Definition

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.

+ References+ Details

- Definition

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.

+ References

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+ Details