Significant Accounting Policies (Tables)

12 Months Ended

Dec. 31, 2012

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

Basic weighted average shares outstanding reconciles to diluted weighted average shares outstanding as follows:

	2012		2011		2010
	(In thousands)
Basic weighted average common shares outstanding		82,689		82,145		80,466
Dilutive effect of stock options, DCUs and unvested shares		952		1,398		1,517
Diluted weighted average common shares outstanding		83,641		83,543		81,983

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

Property and equipment are stated at cost, with depreciation and amortization provided using the straight-line method over the following 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

Certain identifiable intangible assets are amortized over their estimated useful lives using the straight-line method. The estimated useful lives used in the computation of amortization of identifiable intangible assets are as follows:

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