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Supplementary Balance Sheet Detail (Schedule Of Amounts Recognized In Balance Sheet) (Details) - USD ($) $ in Thousands | Dec. 31, 2015 | Dec. 31, 2014
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Balance Sheet Related Disclosures [Abstract] |  |
Raw materials and supplies | $ 80,408 | $ 122,218
Work in process | 136,858 | 176,141
Finished goods | 78,196 | 84,544
Inventories | 295,462 | 382,903
Prepaid expenses | 9,297 | 9,923
Current portion of deferred taxes | 0 | 28,426
Value added tax and other indirect taxes receivable | 10,087 | 39,837
Other current assets | 2,290 | 3,437
Prepaid Expense and Other Assets, Current | 21,674 | 81,623
Land and improvements | 54,064 | 36,375
Buildings | 76,331 | 193,427
Machinery and equipment and other | 486,194 | 1,212,120
Construction in progress | 44,291 | 58,899
Property, plant and equipment | 660,880 | 1,500,821
Payrolls (including incentive programs) | 4,588 | 6,151
Customer prepayments | 559 | 5,534
Employee compensation and benefits | 7,842 | 8,932
Other | 16,790 | 22,702
Accrued liabilities, net | 29,779 | 43,319
Postretirement benefits | 20,019 | 24,833
Pension and related benefits | 55,364 | 65,882
Other | 20,102 | 16,851
Other long - term obligations | $ 95,485 | $ 107,566

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