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Significant Accounting Policies (Tables) | 12 Months Ended
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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 |

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- Definition Schedule Of Property And Equipment At Cost, Depreciation And Amortization Estimated Useful Lives [Table Text Block] + References No definition available. + Details
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- Definition Tabular disclosure of the weighted average number of shares used in calculating basic net earnings per share (or unit) and diluted earnings per share (or unit). + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6371337&loc=d3e3550-109257 + Details
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