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Business Segments (Schedule Of Segment Reporting Information By Segment) (Details) - USD ($) $ in Thousands | 3 Months Ended | 12 Months Ended
--- | --- | ---
Dec. 31, 2024 | Sep. 30, 2024 | Jun. 30, 2024 | Mar. 31, 2024 | Dec. 31, 2023 | Sep. 30, 2023 | Jun. 30, 2023 | Mar. 31, 2023 | Dec. 31, 2024 | Dec. 31, 2023 | Dec. 31, 2022
Revenue from External Customer [Line Items] |  |  |  |  |  |  |  |  |  |  |
Net Sales |  |  |  |  |  |  |  |  | $ 577,014 | $ 551,566 | $ 735,443
Sales | $ 154,049 | $ 146,064 | $ 153,940 | $ 143,972 | $ 136,167 | $ 134,569 | $ 143,350 | $ 159,237 | 598,025 | 573,323 | 761,985
Plant shutdowns, asset impairments, restructurings and other |  |  |  |  |  |  |  |  | 5,766 | 8,529 | 956
Investment Income, Interest |  |  |  |  |  |  |  |  | 36 | 514 | 16
Interest and Debt Expense |  |  |  |  |  |  |  |  | 4,664 | 6,316 | 4,141
Corporate expenses, net |  |  |  |  |  |  |  |  | 24,520 | 33,727 | 40,402
Income (loss) from continuing operations before income taxes |  |  |  |  |  |  |  |  | 880 | (150,465) | 9,564
Income tax expense (benefit) |  |  |  |  |  |  |  |  | (165) | (51,300) | (3,021)
Net income (loss) | (72,698) | (3,946) | 8,792 | 3,288 | (35,591) | (50,380) | (18,922) | (1,009) | (64,565) | (105,905) | 28,455
Income (Loss) from Continuing Operations, Net of Tax, Attributable to Parent | (7,339) | (3,389) | 9,170 | 2,604 | (34,057) | (49,172) | (15,918) | (17) | 1,045 | (99,165) | 12,585
Disposal Group, Including Discontinued Operation, Operating Income (Loss) | $ (65,359) | $ (557) | $ (378) | $ 684 | $ (1,534) | $ (1,208) | $ (3,004) | $ (992) | (65,610) | (6,740) | 15,870
Goodwill impairment |  |  |  |  |  |  |  |  | 13,271 | 34,891 | 0
kaleo |  |  |  |  |  |  |  |  |  |  |
Revenue from External Customer [Line Items] |  |  |  |  |  |  |  |  |  |  |
Gain (loss) on investment accounted for under the fair value method |  |  |  |  |  |  |  |  | 144 | 262 | 1,406
PE Films |  |  |  |  |  |  |  |  |  |  |
Revenue from External Customer [Line Items] |  |  |  |  |  |  |  |  |  |  |
Net Sales |  |  |  |  |  |  |  |  | 105,199 | 76,763 | 97,571
Variable costs |  |  |  |  |  |  |  |  | 50,289 | 40,824 | 56,085
LIFO inventory adjustment |  |  |  |  |  |  |  |  | (174) | (1,333) | 521
Manufacturing fixed costs (e) |  |  |  |  |  |  |  |  | 13,248 | 13,793 | 15,216
Selling, general and administrative costs (e) |  |  |  |  |  |  |  |  | 11,245 | 12,106 | 14,116
Segments Other costs |  |  |  |  |  |  |  |  | 105 | 156 | (316)
Earnings before interest, taxes, depreciation and amortization (EBITDA) |  |  |  |  |  |  |  |  | 30,486 | 11,217 | 11,949
Goodwill impairment |  |  |  |  |  |  |  |  | 0 | (34,891) |
Aluminum Extrusions |  |  |  |  |  |  |  |  |  |  |
Revenue from External Customer [Line Items] |  |  |  |  |  |  |  |  |  |  |
Net Sales |  |  |  |  |  |  |  |  | 471,815 | 474,803 | 637,872
Variable costs |  |  |  |  |  |  |  |  | 354,397 | 365,320 | 503,374
LIFO inventory adjustment |  |  |  |  |  |  |  |  | 1,234 | (944) | (5,402)
Manufacturing fixed costs (e) |  |  |  |  |  |  |  |  | 40,123 | 41,028 | 43,073
Selling, general and administrative costs (e) |  |  |  |  |  |  |  |  | 33,638 | 29,725 | 31,641
Segments Other costs |  |  |  |  |  |  |  |  | 1,066 | 1,698 | (1,614)
Earnings before interest, taxes, depreciation and amortization (EBITDA) |  |  |  |  |  |  |  |  | 41,357 | 37,976 | 66,800
Goodwill impairment |  |  |  |  |  |  |  |  | (13,271) | 0 |
Subtotal |  |  |  |  |  |  |  |  |  |  |
Revenue from External Customer [Line Items] |  |  |  |  |  |  |  |  |  |  |
Variable costs |  |  |  |  |  |  |  |  | 404,686 | 406,144 | 559,459
LIFO inventory adjustment |  |  |  |  |  |  |  |  | 1,060 | (2,277) | (4,881)
Manufacturing fixed costs (e) |  |  |  |  |  |  |  |  | 53,371 | 54,821 | 58,289
Selling, general and administrative costs (e) |  |  |  |  |  |  |  |  | 44,883 | 41,831 | 45,757
Segments Other costs |  |  |  |  |  |  |  |  | 1,171 | 1,854 | (1,930)
Earnings before interest, taxes, depreciation and amortization (EBITDA) |  |  |  |  |  |  |  |  | 71,843 | 49,193 | 78,749
Depreciation and Amortization |  |  |  |  |  |  |  |  | 22,922 | 24,449 | 23,694
Freight |  |  |  |  |  |  |  |  |  |  |
Revenue from External Customer [Line Items] |  |  |  |  |  |  |  |  |  |  |
Cost of Goods and Services Sold |  |  |  |  |  |  |  |  | $ 21,011 | $ 21,757 | $ 26,542

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