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, 2019
Dec. 31, 2018
Goodwill    
Beginning balance $ 1,254,929 $ 1,305,956
Goodwill recognized   649
Goodwill adjustments   (34,811)
Foreign exchange impact and other 4,876 (16,865)
Ending balance 1,259,805 1,254,929
Refining Services    
Goodwill    
Beginning balance 311,892 311,892
Goodwill recognized   0
Goodwill adjustments   0
Foreign exchange impact and other 0 0
Ending balance 311,892 311,892
Catalysts    
Goodwill    
Beginning balance 77,759 79,441
Goodwill recognized   0
Goodwill adjustments   0
Foreign exchange impact and other 852 (1,682)
Ending balance 78,611 77,759
Performance Materials    
Goodwill    
Beginning balance 274,947 313,131
Goodwill recognized   649
Goodwill adjustments   (34,811)
Foreign exchange impact and other 972 (4,022)
Ending balance 275,919 274,947
Performance Chemicals    
Goodwill    
Beginning balance 590,331 601,492
Goodwill recognized   0
Goodwill adjustments   0
Foreign exchange impact and other 3,052 (11,161)
Ending balance $ 593,383 $ 590,331