Quarterly report pursuant to Section 13 or 15(d)

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

v3.10.0.1
Reportable Segments - Summary Financial Information by Reportable Segment (Details) - USD ($)
$ in Thousands
3 Months Ended 9 Months Ended
Sep. 30, 2018
Sep. 30, 2017
Sep. 30, 2018
Sep. 30, 2017
Segment Reporting, Revenue Reconciling Item        
Net sales $ 427,203 $ 391,829 $ 1,228,113 $ 1,114,027
Equity in net income from affiliated companies 5,605 10,257 31,123 24,879
Environmental Catalysts & Services | Zeolyst Joint Venture        
Segment Reporting, Revenue Reconciling Item        
Segment Adjusted EBITDA 10,513 14,398 45,194 39,690
Equity in net income from affiliated companies 5,563 10,151 31,005 24,594
Investment in affiliate and inventory step-up amortization 1,658 1,658 4,975 6,941
Joint venture depreciation, amortization, and interest 3,292 2,563 9,214 8,073
Operating segments        
Segment Reporting, Revenue Reconciling Item        
Segment Adjusted EBITDA 128,397 127,785 382,223 367,319
Operating segments | Environmental Catalysts & Services        
Segment Reporting, Revenue Reconciling Item        
Net sales 139,716 115,541 386,321 350,814
Segment Adjusted EBITDA 65,309 61,900 188,594 182,578
Operating segments | Environmental Catalysts & Services | Zeolyst Joint Venture        
Segment Reporting, Revenue Reconciling Item        
Net sales 32,297 37,622 120,159 100,991
Operating segments | Environmental Catalysts & Services | Reportable Subsegments | Silica Catalysts        
Segment Reporting, Revenue Reconciling Item        
Net sales 16,347 15,117 50,167 52,302
Operating segments | Environmental Catalysts & Services | Reportable Subsegments | Refining Services        
Segment Reporting, Revenue Reconciling Item        
Net sales 123,369 100,424 336,154 298,512
Operating segments | Performance Materials & Chemicals        
Segment Reporting, Revenue Reconciling Item        
Net sales 288,319 277,072 844,302 765,781
Segment Adjusted EBITDA 63,088 65,885 193,629 184,741
Operating segments | Performance Materials & Chemicals | Reportable Subsegments | Performance Chemicals        
Segment Reporting, Revenue Reconciling Item        
Net sales 174,722 175,467 548,446 515,454
Operating segments | Performance Materials & Chemicals | Reportable Subsegments | Performance Materials        
Segment Reporting, Revenue Reconciling Item        
Net sales 115,380 104,433 304,660 257,676
Operating segments | Performance Materials & Chemicals | Intersubsegment Eliminations        
Segment Reporting, Revenue Reconciling Item        
Net sales (1,783) (2,828) (8,804) (7,349)
Eliminations        
Segment Reporting, Revenue Reconciling Item        
Net sales $ (832) $ (784) $ (2,510) $ (2,568)