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Supplementary Balance Sheet Detail (Schedule Of Amounts Recognized In Balance Sheet) (Details) - USD ($)
$ in Thousands
Dec. 31, 2021
Dec. 31, 2020
Balance Sheet Related Disclosures [Abstract]    
Raw materials and supplies $ 132,113 $ 101,098
Work in process 127,127 110,331
Finished goods 30,192 54,535
Inventories 289,432 265,964
Prepaid expenses 8,193 9,242
Value-added tax and other indirect taxes receivable* 40,861 10,666
Spare parts inventory 12,408 11,825
Other current assets 11,902 3,381
Prepaid Expense and Other Assets, Current 73,364 35,114
Land and improvements 49,201 50,285
Buildings 79,660 80,041
Machinery and equipment and other 621,808 621,478
Construction in progress 64,629 33,098
Property, plant and equipment 815,298 784,902
Payrolls (including incentive programs) 16,904 13,159
Employee benefits 7,272 7,128
Deferred Revenue 9,840 13,056
Other 22,389 23,158
Accrued liabilities, net 56,405 56,501
Post-employment benefits 14,597 15,669
Pension and related benefits 31,139 37,847
Other 22,921 27,962
Other long - term obligations $ 68,657 $ 81,478