Earnings Per Share (EPS) (Details)	3 Months Ended	9 Months Ended
Sep. 30, 2011	Sep. 30, 2010	Sep. 30, 2011	Sep. 30, 2010
Weighted-average common shares outstanding
Weighted-average common shares outstanding	129,493,000	128,602,000	129,341,000	127,840,000
Dilutive effect of
Stock options/SOSARs	35,000	58,000	0	0
Other stock compensation plans	240,000	250,000	0	0
Weighted-average common shares outstanding, assuming dilution	129,768,000	128,910,000	129,341,000	127,840,000
Antidilutive common stock equivalents
Antidilutive common stock equivalents	5,871,000	6,225,000	5,871,000	4,905,000
Earnings Per Share (EPS) (Textuals)
Shares excluded from diluted weighted-average common shares outstanding computation due to operating losses			304,000	406,000

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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