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Segment Reporting (Schedule Of Segment Reporting Information By Segment) (Details) (USD $) In Thousands, unless otherwise specified | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2012 | Sep. 30, 2011 | Sep. 30, 2012 | Sep. 30, 2011
Segment Reporting Information [Line Items] |  |  |  |
Total net sales | $ 212,679 | $ 197,954 | $ 634,716 | $ 581,703
Add back freight | 6,130 | 4,636 | 17,404 | 13,377
Sales as shown in the Consolidated Statements of Income | 218,809 | 202,590 | 652,120 | 595,080
Total | 22,287 | 17,086 | 52,942 | 44,521
Interest income | 84 | 278 | 337 | 778
Interest expense | 708 | 367 | 2,732 | 1,083
Gain on investment accounted for under fair value method |  |  | 9,000 |
Stock option-based compensation costs | 386 | 474 | 1,147 | 1,481
Corporate expenses, net | 4,789 | 3,920 | 17,206 | 10,954
Income from continuing operations before income taxes | 19,188 | 12,603 | 41,194 | 31,781
Income taxes from continuing operations | 4,661 | (133) | 11,516 | 6,329
Income from continuing operations | 14,527 | 12,736 | 29,678 | 25,452
Loss from discontinued operations | (7,100) |  | (11,900) | (345)
Net income | 7,427 | 12,736 | 17,778 | 25,107
Specialty Pharmaceutical Company [Member] |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Gain on investment accounted for under fair value method | 2,700 |  | 9,000 |
Income taxes from continuing operations | (1,209) | (112) | (3,100) | 181
Net income | (1,880) | (202) | (4,926) | 423
Film Products [Member] |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Total net sales | 155,296 | 129,733 | 459,221 | 393,289
Ongoing operations | 21,092 | 15,485 | 49,999 | 43,872
Plant shutdowns, asset impairments, restructurings and other | (87) | (1,435) | (1,879) | (2,519)
Aluminum Extrusions [Member] |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Total net sales | 55,222 | 66,815 | 172,525 | 186,712
Ongoing operations | 1,846 | 2,301 | 7,349 | 2,539
Plant shutdowns, asset impairments, restructurings and other | (1,067) | (43) | (3,214) | 19
Other [Member] |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Total net sales | 2,161 | 1,406 | 2,970 | 1,702
Ongoing operations | $ 503 | $ 778 | $ 687 | $ 610

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