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Organization And Summary Of Significant Accounting Policies (Details)
Mar. 31, 2022
major_product_categories
Dec. 31, 2021
Apr. 26, 2018
$ / shares
shares
Accounting Policies [Abstract]      
Shares, Issued | shares     38,097,525
Sale of Stock, Price Per Share | $ / shares     $ 15.00
Number of major product categories | major_product_categories 2    
GrafTech International Ltd | Brookfield      
New Accounting Pronouncements or Change in Accounting Principle [Line Items]      
Equity Method Investment, Ownership Percentage 24.60% 24.30%