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Summary Of Significant Accounting Policies (Narrative) (Details) - USD ($) $ in Thousands | 3 Months Ended | 12 Months Ended |
--- | --- | --- | ---
Sep. 30, 2015 | Mar. 31, 2009 | Dec. 31, 2015 | Dec. 31, 2014 | Dec. 31, 2013 | Dec. 31, 2012
Summary Of Significant Accounting Policies [Line Items] |  |  |  |  |  |  |  |
Deferred Finance Costs, Net |  |  | $ 700 |  | $ 1,100 |  |  |
Interest Costs Capitalized |  |  | 400 |  | 1,100 |  | $ 900 |
Foreign Currency Transaction Gain (Loss), before Tax |  |  | (4,000) |  | (1,500) |  | (400) |
Cash and cash equivalents |  |  | $ 44,156 | [1] | 50,056 | [1] | 52,617 | $ 48,822
Investments, percentage of voting ownership interest |  |  | 50.00% |  |  |  |  |
Goodwill, Impairment Loss |  |  | $ 44,465 |  | $ 0 |  | $ 0 |
Incremental shares excluded from the calculation of incremental shares attributable to stock options and restricted stock |  |  | 881,513 |  | 320,849 |  | 31,167 |
Foreign Country |  |  |  |  |  |  |  |
Summary Of Significant Accounting Policies [Line Items] |  |  |  |  |  |  |  |
Cash and cash equivalents |  |  | $ 27,700 |  | $ 40,500 |  |  |
Minimum | Buildings And Land Improvements |  |  |  |  |  |  |  |
Summary Of Significant Accounting Policies [Line Items] |  |  |  |  |  |  |  |
Average useful life |  |  | 5 years |  |  |  |  |
Minimum | Automotive |  |  |  |  |  |  |  |
Summary Of Significant Accounting Policies [Line Items] |  |  |  |  |  |  |  |
Average useful life |  |  | 2 years |  |  |  |  |
Maximum | Buildings And Land Improvements |  |  |  |  |  |  |  |
Summary Of Significant Accounting Policies [Line Items] |  |  |  |  |  |  |  |
Average useful life |  |  | 40 years |  |  |  |  |
Maximum | Automotive |  |  |  |  |  |  |  |
Summary Of Significant Accounting Policies [Line Items] |  |  |  |  |  |  |  |
Average useful life |  |  | 20 years |  |  |  |  |
Flexible Packaging Films [Member] [Domain] |  |  |  |  |  |  |  |
Summary Of Significant Accounting Policies [Line Items] |  |  |  |  |  |  |  |
Goodwill, Impairment Loss | $ 44,465 |  | $ 44,465 |  | $ 0 |  | $ 0 |
Goodwill, Impairment Loss, Net of Tax | $ 44,500 |  |  |  |  |  |  |
Aluminum Extrusions |  |  |  |  |  |  |  |
Summary Of Significant Accounting Policies [Line Items] |  |  |  |  |  |  |  |
Goodwill, Impairment Loss |  | $ 30,600 | $ 0 |  |  |  |  |
[1] | Information on exports and foreign operations are provided on the previous page. Cash and cash equivalents includes funds held in locations outside the U.S. of $27.7 million and $40.5 million at December 31, 2015 and 2014, respectively. Export sales relate almost entirely to PE Films. Operations outside the U.S. in The Netherlands, Hungary, China and India also relate to PE Films. Operations in Brazil are primarily related to Flexible Packaging Films, but also include PE Films operations. Sales from locations in The Netherlands and Hungary are primarily to customers located in Europe. Sales from locations in China (Guangzhou and Shanghai) are primarily to customers located in China, but also include other customers in Asia.

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