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Goodwill And Other Intangible Assets (Reconciliation Of The Beginning And Ending Balance Of Goodwill) (Details) - USD ($) $ in Thousands | 3 Months Ended | 12 Months Ended
--- | --- | ---
Sep. 30, 2015 | Mar. 31, 2009 | Dec. 31, 2016 | Dec. 31, 2015 | Dec. 31, 2014
Goodwill [Roll Forward] |  |  |  |  |
Goodwill, Impairment Loss |  |  | $ 0 | $ (44,465) | $ 0
Net carrying value of goodwill, beginning of period |  |  | 117,839 | 169,687 |
Increase (decrease) due to foreign currency translation |  |  | (17) | (7,383) |
Net carrying value of goodwill, end of period |  |  | 117,822 | 117,839 | 169,687
Aluminum Extrusions |  |  |  |  |
Goodwill [Roll Forward] |  |  |  |  |
Goodwill, Impairment Loss |  | $ (30,600) |  |  |
Net carrying value of goodwill, beginning of period |  |  | 13,696 | 13,696 |
Increase (decrease) due to foreign currency translation |  |  | 0 | 0 |
Net carrying value of goodwill, end of period |  |  | 13,696 | 13,696 | 13,696
PE Films [Member] |  |  |  |  |
Goodwill [Roll Forward] |  |  |  |  |
Net carrying value of goodwill, beginning of period |  |  | 104,143 | 104,160 |
Increase (decrease) due to foreign currency translation |  |  | (17) | (17) |
Net carrying value of goodwill, end of period |  |  | 104,126 | 104,143 | 104,160
Flexible Packaging Films [Member] [Domain] |  |  |  |  |
Goodwill [Roll Forward] |  |  |  |  |
Goodwill, Impairment Loss | $ (44,500) |  | 0 | (44,465) | 0
Net carrying value of goodwill, beginning of period |  |  | 0 | 51,831 |
Increase (decrease) due to foreign currency translation |  |  | 0 | (7,366) |
Net carrying value of goodwill, end of period |  |  | $ 0 | $ 0 | $ 51,831

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- Definition Amount after accumulated impairment loss of an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=35741047&loc=d3e13816-109267 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6388280&loc=d3e13770-109266 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 45 -Paragraph 5 -URI http://asc.fasb.org/extlink&oid=64834752&loc=SL49117168-202975 + Details
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- Definition Amount of foreign currency translation gain (loss) which increases (decreases) an asset representing future economic benefits from other assets acquired in a business combination that are not individually identified and separately recognized. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (f) -URI http://asc.fasb.org/extlink&oid=35741047&loc=d3e13816-109267 + Details
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- Definition Amount of loss from the write-down of an asset representing the future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 50 -Paragraph 2 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=35741047&loc=d3e13854-109267 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 45 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6388280&loc=d3e13777-109266 Reference 3: 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=66902209&loc=d3e3602-108585 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (e) -URI http://asc.fasb.org/extlink&oid=35741047&loc=d3e13816-109267 + Details
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