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Business Segments (Schedule Of Depreciation And Amortization, Capital Expenditures) (Details) - USD ($) $ in Thousands | 12 Months Ended
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Dec. 31, 2015 | Dec. 31, 2014 | Dec. 31, 2013
Segment Reporting Information [Line Items] |  |  |
Depreciation and Amortization | $ 34,982 | $ 40,818 | $ 44,655
Capital Expenditures | 32,831 | 44,898 | 79,661
PE Films [Member] |  |  |
Segment Reporting Information [Line Items] |  |  |
Depreciation and Amortization | 15,480 | 21,399 | 25,656
Capital Expenditures | 21,218 | 17,000 | 15,615
Flexible Packaging Films [Member] [Domain] |  |  |
Segment Reporting Information [Line Items] |  |  |
Depreciation and Amortization | 9,697 | 9,331 | 9,676
Capital Expenditures | 3,489 | 21,806 | 49,252
Aluminum Extrusions |  |  |
Segment Reporting Information [Line Items] |  |  |
Depreciation and Amortization | 9,698 | 9,974 | 9,202
Capital Expenditures | 8,124 | 6,092 | 14,742
Subtotal |  |  |
Segment Reporting Information [Line Items] |  |  |
Depreciation and Amortization | 34,875 | 40,704 | 44,534
Capital Expenditures | 32,831 | 44,898 | 79,609
General Corporate |  |  |
Segment Reporting Information [Line Items] |  |  |
Depreciation and Amortization | 107 | 114 | 121
Capital Expenditures | $ 0 | $ 0 | $ 52

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- Definition The aggregate expense recognized in the current period that allocates the cost of tangible assets, intangible assets, or depleting assets to periods that benefit from use of the assets. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=56944662&loc=d3e3602-108585 + Details
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- Definition The cash outflow associated with the acquisition of long-lived, physical assets that are used in the normal conduct of business to produce goods and services and not intended for resale; includes cash outflows to pay for construction of self-constructed assets. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Investing Activities -URI http://asc.fasb.org/extlink&oid=6516133 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 13 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=56944662&loc=d3e3213-108585 + Details
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