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Segment Reporting (Schedule Of Identifiable Assets By Segment) (Details) - USD ($) $ in Thousands | Sep. 30, 2016 | Dec. 31, 2015 | Sep. 30, 2015 | Dec. 31, 2014
--- | --- | --- | --- | ---
Subtotal | $ 593,772 | $ 553,424 |  |
General corporate | 33,642 | 25,680 |  |
Cash and cash equivalents | 28,356 | 44,156 | $ 46,609 | $ 50,056
Total assets | 655,770 | 623,260 |  |
PE Films |  |  |  |
Total assets | 287,516 | 270,236 |  |
Flexible Packaging Films [Member] [Domain] |  |  |  |
Total assets | 157,069 | 146,253 |  |
Aluminum Extrusions |  |  |  |
Total assets | $ 149,187 | $ 136,935 |  |

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