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Investments in Associated Companies - Schedule of Equity Method Investments (Details) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2025
Dec. 31, 2024
Dec. 31, 2023
Total equity in net income of associated companies $ 15,177 $ 10,971 $ 15,333
Houghton Korea      
Total equity in net income of associated companies 9,185 6,795 11,442
Nippon Japan      
Total equity in net income of associated companies 1,085 925 1,492
Kelko Panama      
Total equity in net income of associated companies 370 321 309
SKT      
Total equity in net income of associated companies 265 0 0
Primex      
Total equity in net income of associated companies $ 4,272 $ 2,930 $ 2,090