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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, 2018 | Mar. 31, 2017 | Dec. 31, 2017 | Dec. 31, 2016
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items] |  |  |  |
Accumulated Other Comprehensive Income (Loss), Net of Tax | $ (172,436) | $ (176,278) | $ (176,669) | $ (183,234)
Cost of goods sold | (203,189) | (179,761) |  |
Selling, general and administrative | 21,829 | 19,949 |  |
Income before income taxes | (23,451) | (6,121) |  |
Income taxes from continuing operations | (5,287) | (2,418) |  |
Net income | 18,164 | 3,703 |  |
Foreign Currency Translation |  |  |  |
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items] |  |  |  |
Accumulated Other Comprehensive Income (Loss), Net of Tax | (84,272) | (89,338) | (86,178) | (93,970)
Gain (Loss) on Derivative Financial Instruments |  |  |  |
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items] |  |  |  |
Accumulated Other Comprehensive Income (Loss), Net of Tax | 174 | 1,237 | 459 | 863
Pension & Other Post-retirement Benefit Adjust. |  |  |  |
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items] |  |  |  |
Accumulated Other Comprehensive Income (Loss), Net of Tax | (88,338) | (88,177) | $ (90,950) | $ (90,127)
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 | (206) | (248) |  |
Income taxes from continuing operations | (53) | (94) |  |
Net income | 153 | 154 |  |
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] |  |  |  |
Cost of goods sold | 232 | 233 |  |
Reclassification Out Of Accumulated Other Comprehensive Income | Pension & Other Post-retirement Benefit Adjust. |  |  |  |
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items] |  |  |  |
Actuarial gain (loss) and prior service costs, before taxes | (3,374) | (3,061) |  |
Income taxes from continuing operations | 762 | 1,111 |  |
Net income | (2,612) | (1,950) |  |
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] |  |  |  |
Selling, general and administrative | (41) |  |  |
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] |  |  |  |
Cost of goods sold | $ (15) | $ (15) |  |

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