v3.25.4
Segment Reporting (Schedule Of Financial Information Concerning Reportable Segments) (Details) - Graphite Electrodes - Sales Revenue, Net
12 Months Ended
Dec. 31, 2025
Product Concentration Risk  
Segment Reporting Information [Line Items]  
Concentration Risk, Percentage 91.00%
Customer Concentration Risk  
Segment Reporting Information [Line Items]  
Concentration Risk, Percentage 11.00%