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Supplementary Balance Sheet Detail (Schedule Of Amounts Recognized In Balance Sheet) (Details) - USD ($) $ in Thousands | Dec. 31, 2018 | Dec. 31, 2017
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Balance Sheet Related Disclosures [Abstract] |  |
Raw materials and supplies | $ 99,935 | $ 39,434
Work in process | 125,767 | 85,852
Finished goods | 68,015 | 48,865
Inventories | 293,717 | 174,151
Prepaid expenses | 10,720 | 9,505
Value added tax and other indirect taxes receivable | 19,242 | 18,627
Other Inventories, Spare Parts, Gross | 11,507 | 11,010
Other current assets | 4,699 | 5,730
Prepaid Expense and Other Assets, Current | 46,168 | 44,872
Land and improvements | 45,947 | 46,599
Buildings | 68,680 | 59,608
Machinery and equipment and other | 532,084 | 495,069
Construction in progress | 42,131 | 41,375
Property, plant and equipment | 688,842 | 642,651
Payrolls (including incentive programs) | 17,284 | 14,196
Employee benefits | 6,977 | 4,684
Deferred Revenue | 5,380 | 20,784
Other | 20,811 | 13,562
Accrued liabilities, net | 50,452 | 53,226
Postretirement benefits | 16,192 | 20,508
Pension and related benefits | 33,718 | 36,116
Other | 22,609 | 12,283
Other long - term obligations | $ 72,519 | $ 68,907

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