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Significant Accounting Policies (Tables) | 12 Months Ended
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Dec. 31, 2016
Accounting Policies [Abstract] |
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:
| 2016 |  | 2015 |  | 2014
| (In thousands)
Basic weighted average common shares outstanding | 75,803 |  |  | 77,126 |  |  | 79,715 |
Dilutive effect of stock options, restricted stock, performance share units and DCUs | 955 |  |  | 846 |  |  | 1,013 |
Diluted weighted average common shares outstanding | 76,758 |  |  | 77,972 |  |  | 80,728 |
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
Schedule of Identifiable Intangible Assets, Useful Lives | 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 | 6 to 20 years
Unpatented technology and other | 6 to 20 years

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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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