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Accumulated Other Comprehensive Income (Loss) (Schedule Of Reclassifications Of Balances Out Of Accumulated Other Comprehensive Income (Loss) Into Net Income) (Details) - USD ($) $ in Thousands | 3 Months Ended |  |
--- | --- | --- | ---
Mar. 31, 2019 | Mar. 31, 2018 | Dec. 31, 2018 | Dec. 31, 2017
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items] |  |  |  |
Accumulated Other Comprehensive Income (Loss), Net of Tax | $ (179,051) | $ (172,436) | $ (179,987) | $ (176,669)
Selling, general and administrative | 22,012 | 21,829 |  |
Income before income taxes | (23,811) | (23,451) |  |
Income taxes from continuing operations | (4,026) | (5,287) |  |
Net income | 19,785 | 18,164 |  |
Foreign Currency Translation |  |  |  |
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items] |  |  |  |
Accumulated Other Comprehensive Income (Loss), Net of Tax | (97,730) | (84,272) | (96,940) | (86,178)
Gain (Loss) on Derivative Financial Instruments |  |  |  |
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items] |  |  |  |
Accumulated Other Comprehensive Income (Loss), Net of Tax | (1,954) | 174 | (1,601) | 459
Pension & Other Post-retirement Benefit Adjustment |  |  |  |
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items] |  |  |  |
Accumulated Other Comprehensive Income (Loss), Net of Tax | (79,367) | (88,338) | $ (81,446) | $ (90,950)
Reclassification Out Of Accumulated Other Comprehensive Income | Gain (Loss) on Derivative Financial Instruments |  |  |  |
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items] |  |  |  |
Income before income taxes | 793 | (206) |  |
Income taxes from continuing operations | 135 | (53) |  |
Net income | (658) | 153 |  |
Reclassification Out Of Accumulated Other Comprehensive Income | Gain (Loss) on Derivative Financial Instruments | Aluminum Futures Contracts |  |  |  |
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items] |  |  |  |
Freight | (617) | 232 |  |
Reclassification Out Of Accumulated Other Comprehensive Income | Pension & Other Post-retirement Benefit Adjustment |  |  |  |
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items] |  |  |  |
Actuarial gain (loss) and prior service costs, before taxes | (2,671) | (3,374) |  |
Income taxes from continuing operations | 592 | 762 |  |
Net income | (2,079) | (2,612) |  |
Selling, General and Administrative Expenses [Member] | Reclassification Out Of Accumulated Other Comprehensive Income | Gain (Loss) on Derivative Financial Instruments | Foreign Currency Forward Contracts |  |  |  |
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items] |  |  |  |
Freight |  | (41) |  |
Selling, general and administrative | (191) |  |  |
Cost of Sales [Member] | Reclassification Out Of Accumulated Other Comprehensive Income | Gain (Loss) on Derivative Financial Instruments | Foreign Currency Forward Contracts |  |  |  |
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items] |  |  |  |
Freight | $ 15 | $ 15 |  |

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