Annual report pursuant to Section 13 and 15(d)

Goodwill and Other Intangible Assets - Goodwill Rollforward (Details)

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Goodwill and Other Intangible Assets - Goodwill Rollforward (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2023
Dec. 31, 2022
Goodwill    
Beginning balance $ 403,163 $ 406,139
Goodwill adjustments   (81)
Foreign exchange impact 1,307 (2,895)
Ending balance 404,470 403,163
Ecoservices    
Goodwill    
Beginning balance 326,589 326,670
Goodwill adjustments   (81)
Foreign exchange impact 0 0
Ending balance 326,589 326,589
Advanced Materials & Catalysts    
Goodwill    
Beginning balance 76,574 79,469
Goodwill adjustments   0
Foreign exchange impact 1,307 (2,895)
Ending balance $ 77,881 $ 76,574