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Segment Reporting (Schedule Of Segment Reporting Information By Segment) (Details) (USD $) In Thousands, unless otherwise specified | 3 Months Ended
--- | ---
Mar. 31, 2013 | Mar. 31, 2012
Segment Reporting Information [Line Items] |  |
Total net sales | $ 234,324 | $ 211,307
Add back freight | 7,202 | 5,336
Sales as shown in the Consolidated Statements of Income | 241,526 | 216,643
Total | 21,266 | 15,824
Interest income | 78 | 170
Interest expense | 690 | 1,007
Gain on investment accounted for under fair value method | 1,100 | 3,600
Stock option-based compensation costs | 316 | 446
Corporate expenses, net | 8,157 | 6,272
Income from continuing operations before income taxes | 13,281 | 11,869
Income taxes | 3,764 | 4,132
Income from continuing operations | 9,517 | 7,737
Loss from discontinued operations | (5,240) | (4,739)
Net income (loss) | 4,277 | 2,998
Intelliject [Member] |  |
Segment Reporting Information [Line Items] |  |
Gain on investment accounted for under fair value method | 1,100 | 3,600
Income taxes | (1,087) | (950)
Net income (loss) | (915) | (1,539)
Film Products [Member] |  |
Segment Reporting Information [Line Items] |  |
Total net sales | 154,385 | 153,699
Ongoing operations | 17,007 | 15,466
Plant shutdowns, asset impairments, restructurings and other | (102) | (284)
Aluminum Extrusions [Member] |  |
Segment Reporting Information [Line Items] |  |
Total net sales | 79,939 | 57,608
Ongoing operations | 4,614 | 1,703
Plant shutdowns, asset impairments, restructurings and other | $ (253) | $ (1,061)

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