Annual report pursuant to Section 13 and 15(d)

Goodwill and Other Intangible Assets - Goodwill Rollforward (Details)

v3.20.4
Goodwill and Other Intangible Assets - Goodwill Rollforward (Details) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Goodwill      
Beginning balance $ 973,578 $ 969,674  
Goodwill impairment charge (260,000) 0 $ 0
Foreign exchange impact 4,160 3,904  
Ending balance 717,738 973,578 969,674
Goodwill, Impaired, Accumulated Impairment Loss, beginning 0 0  
Goodwill, Impaired, Accumulated Impairment Loss, ending 260,000 0 0
Refining Services      
Goodwill      
Beginning balance 311,892 311,892  
Goodwill impairment charge 0    
Foreign exchange impact 0 0  
Ending balance 311,892 311,892 311,892
Goodwill, Impaired, Accumulated Impairment Loss, beginning 0    
Goodwill, Impaired, Accumulated Impairment Loss, ending 0 0  
Catalysts      
Goodwill      
Beginning balance 78,611 77,759  
Goodwill impairment charge 0    
Foreign exchange impact 1,062 852  
Ending balance 79,673 78,611 77,759
Goodwill, Impaired, Accumulated Impairment Loss, beginning 0 0  
Goodwill, Impaired, Accumulated Impairment Loss, ending 0 0 0
Performance Chemicals      
Goodwill      
Beginning balance 583,075 580,023  
Goodwill impairment charge (260,000)    
Foreign exchange impact 3,098 3,052  
Ending balance 326,173 583,075 580,023
Goodwill, Impaired, Accumulated Impairment Loss, beginning 0 0  
Goodwill, Impaired, Accumulated Impairment Loss, ending $ 260,000 $ 0 $ 0