Annual report pursuant to Section 13 and 15(d)

Revenue from Contracts with Customers Disaggregated Revenue (Details)

v3.20.4
Revenue from Contracts with Customers Disaggregated Revenue (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
Disaggregation of Revenue [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
Refining Services                      
Disaggregation of Revenue [Line Items]                      
Sales                 398,657 443,684 452,325
Catalysts                      
Disaggregation of Revenue [Line Items]                      
Sales                 94,002 85,667 72,099
Performance Chemicals                      
Disaggregation of Revenue [Line Items]                      
Sales                 614,704 670,563 704,502
Operating segments                      
Disaggregation of Revenue [Line Items]                      
Sales                 1,110,624 1,203,311 1,232,163
Operating segments | Industrial & chemical process                      
Disaggregation of Revenue [Line Items]                      
Sales                 350,069 380,408 393,779
Operating segments | Fuels & emission control                      
Disaggregation of Revenue [Line Items]                      
Sales                 225,042 252,294 246,452
Operating segments | Packaging & engineered plastics                      
Disaggregation of Revenue [Line Items]                      
Sales                 180,105 185,352 184,804
Operating segments | Consumer products                      
Disaggregation of Revenue [Line Items]                      
Sales                 235,792 260,495 272,187
Operating segments | Natural resources                      
Disaggregation of Revenue [Line Items]                      
Sales                 119,616 124,762 134,941
Operating segments | Refining Services                      
Disaggregation of Revenue [Line Items]                      
Sales                 401,913 447,081 455,562
Operating segments | Refining Services | Industrial & chemical process                      
Disaggregation of Revenue [Line Items]                      
Sales                 70,648 80,661 77,866
Operating segments | Refining Services | Fuels & emission control                      
Disaggregation of Revenue [Line Items]                      
Sales                 225,042 252,294 246,452
Operating segments | Refining Services | Packaging & engineered plastics                      
Disaggregation of Revenue [Line Items]                      
Sales                 38,772 48,056 59,168
Operating segments | Refining Services | Consumer products                      
Disaggregation of Revenue [Line Items]                      
Sales                 0 0 0
Operating segments | Refining Services | Natural resources                      
Disaggregation of Revenue [Line Items]                      
Sales                 67,451 66,070 72,076
Operating segments | Catalysts                      
Disaggregation of Revenue [Line Items]                      
Sales                 94,007 85,667 72,099
Operating segments | Catalysts | Industrial & chemical process                      
Disaggregation of Revenue [Line Items]                      
Sales                 125 96 86
Operating segments | Catalysts | Fuels & emission control                      
Disaggregation of Revenue [Line Items]                      
Sales                 0 0 0
Operating segments | Catalysts | Packaging & engineered plastics                      
Disaggregation of Revenue [Line Items]                      
Sales                 93,882 85,571 72,013
Operating segments | Catalysts | Consumer products                      
Disaggregation of Revenue [Line Items]                      
Sales                 0 0 0
Operating segments | Catalysts | Natural resources                      
Disaggregation of Revenue [Line Items]                      
Sales                 0 0 0
Operating segments | Performance Chemicals                      
Disaggregation of Revenue [Line Items]                      
Sales                 614,704 670,563 704,502
Operating segments | Performance Chemicals | Industrial & chemical process                      
Disaggregation of Revenue [Line Items]                      
Sales                 279,296 299,651 315,827
Operating segments | Performance Chemicals | Fuels & emission control                      
Disaggregation of Revenue [Line Items]                      
Sales                 0 0 0
Operating segments | Performance Chemicals | Packaging & engineered plastics                      
Disaggregation of Revenue [Line Items]                      
Sales                 47,451 51,725 53,623
Operating segments | Performance Chemicals | Consumer products                      
Disaggregation of Revenue [Line Items]                      
Sales                 235,792 260,495 272,187
Operating segments | Performance Chemicals | Natural resources                      
Disaggregation of Revenue [Line Items]                      
Sales                 52,165 58,692 62,865
Eliminations                      
Disaggregation of Revenue [Line Items]                      
Sales                 (3,261) (3,397) (3,237)
Eliminations | Refining Services                      
Disaggregation of Revenue [Line Items]                      
Sales                 (3,256) (3,397) (3,237)
Eliminations | Catalysts                      
Disaggregation of Revenue [Line Items]                      
Sales                 (5) 0 0
Eliminations | Performance Chemicals                      
Disaggregation of Revenue [Line Items]                      
Sales                 $ 0 $ 0 $ 0