Annual report pursuant to Section 13 and 15(d)

Reportable Segments - Summary Financial Information by Reportable Segment (Details)

v3.20.4
Reportable Segments - Summary Financial Information by Reportable Segment (Details) - USD ($)
$ in Thousands
 3 Months Ended 12 Months Ended
Dec. 31, 2020
Sep. 30, 2020
Jun. 30, 2020
Mar. 31, 2020
Dec. 31, 2019
Sep. 30, 2019
Jun. 30, 2019
Mar. 31, 2019
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Segment Reporting, Revenue Reconciling Item [Line Items]                      
Sales $ 281,505 $ 275,149 $ 254,896 $ 295,813 $ 283,535 $ 307,271 $ 311,641 $ 297,468 $ 1,107,363 $ 1,199,914 $ 1,228,926
Equity in net income from affiliated companies                 21,237 46,022 37,569
Charges related to purchase accounting fair value adjustments                 (6,634) (7,534)  
Refining Services                      
Segment Reporting, Revenue Reconciling Item [Line Items]                      
Sales                 398,657 443,684 452,325
Catalysts                      
Segment Reporting, Revenue Reconciling Item [Line Items]                      
Sales                 94,002 85,667 72,099
Performance Chemicals                      
Segment Reporting, Revenue Reconciling Item [Line Items]                      
Sales                 614,704 670,563 704,502
Operating segments                      
Segment Reporting, Revenue Reconciling Item [Line Items]                      
Sales                 1,110,624 1,203,311 1,232,163
Segment Adjusted EBITDA                 374,074 434,995 425,762
Operating segments | Refining Services                      
Segment Reporting, Revenue Reconciling Item [Line Items]                      
Sales                 401,913 447,081 455,562
Segment Adjusted EBITDA                 157,198 175,640 176,499
Operating segments | Catalysts                      
Segment Reporting, Revenue Reconciling Item [Line Items]                      
Sales                 94,007 85,667 72,099
Segment Adjusted EBITDA                 74,504 107,808 81,067
Operating segments | Performance Chemicals                      
Segment Reporting, Revenue Reconciling Item [Line Items]                      
Sales                 614,704 670,563 704,502
Segment Adjusted EBITDA                 142,372 151,547 168,196
Eliminations                      
Segment Reporting, Revenue Reconciling Item [Line Items]                      
Sales                 (3,261) (3,397) (3,237)
Zeolyst Joint Venture | Catalysts                      
Segment Reporting, Revenue Reconciling Item [Line Items]                      
Sales                 128,623 170,338 156,687
Segment Adjusted EBITDA                 42,515 68,138 56,663
Equity in net income from affiliated companies                 21,157 45,899 37,437
Charges related to purchase accounting fair value adjustments                 6,634 7,534 6,634
Joint venture depreciation, amortization, and interest                 $ 14,724 $ 14,705 $ 12,592