Significant Accounting Policies (Tables)

12 Months Ended

Dec. 31, 2011

Significant Accounting Policies [Abstract]

Schedule Of Basic Weighted Average Shares Reconciles To Diluted Weighted Average Shares

	2011		2010		2009
	(In thousands)
Basic weighted average common shares outstanding		82,145		80,466		79,716
Dilutive effect of stock options, DCUs and unvested shares		1,398		1,517		1,011
Diluted weighted average common shares outstanding		83,543		81,983		80,727

Property And Equipment At Cost, Depreciation And Amortization Estimated Useful Lives

Land improvements	8 to 12 years
Buildings and improvements	8 to 30 years
Machinery, equipment and other	3 to 12 years
Office and transportation equipment	3 to 10 years

Patents	5 to 17 years
Trade names	10 to 20 years
Customer relationships	3 to 20 years
Non-compete agreements	2 to 5 years
Unpatented technology and other	4 to 20 years