Annual report pursuant to Section 13 and 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 12 Months Ended
Dec. 31, 2018
Sep. 30, 2018
Jun. 30, 2018
Mar. 31, 2018
Dec. 31, 2017
Sep. 30, 2017
Jun. 30, 2017
Mar. 31, 2017
Dec. 31, 2018
Dec. 31, 2017
Dec. 31, 2016
Segment Reporting, Revenue Reconciling Item [Line Items]                      
Sales $ 380,041 $ 427,203 $ 434,713 $ 366,197 $ 358,074 $ 391,829 $ 389,267 $ 332,931 $ 1,608,154 $ 1,472,101 $ 1,064,177
Segment Adjustment EBITDA                 386,252 294,590 198,898
Equity in net income (loss) from affiliated companies                 37,611 38,772 (2,612)
Performance Materials & Chemicals                      
Segment Reporting, Revenue Reconciling Item [Line Items]                      
Sales                 1,083,816    
Environmental Catalysts & Services                      
Segment Reporting, Revenue Reconciling Item [Line Items]                      
Sales                 524,338    
Environmental Catalysts & Services | Zeolyst Joint Venture                      
Segment Reporting, Revenue Reconciling Item [Line Items]                      
Segment Adjustment EBITDA                 56,663 58,156 39,903
Equity in net income (loss) from affiliated companies                 42,854 46,252 (3,313)
Investment in affiliate and inventory step-up amortization                 6,634 8,600 36,296
Joint venture depreciation, amortization, and interest                 12,592 11,070 6,920
Operating segments                      
Segment Reporting, Revenue Reconciling Item [Line Items]                      
Sales                 1,611,477    
Segment Adjustment EBITDA                 500,923 483,715 355,504
Operating segments | Performance Materials & Chemicals                      
Segment Reporting, Revenue Reconciling Item [Line Items]                      
Sales                 1,083,816 1,001,849 638,951
Segment Adjustment EBITDA                 243,357 240,128 158,679
Operating segments | Environmental Catalysts & Services                      
Segment Reporting, Revenue Reconciling Item [Line Items]                      
Sales                 527,661 473,675 426,747
Segment Adjustment EBITDA                 257,566 243,587 196,825
Operating segments | Environmental Catalysts & Services | Zeolyst Joint Venture                      
Segment Reporting, Revenue Reconciling Item [Line Items]                      
Sales                 156,687 143,774 94,516
Operating segments | Reportable Subsegment | Performance Materials & Chemicals | Performance Chemicals                      
Segment Reporting, Revenue Reconciling Item [Line Items]                      
Sales                 717,335 687,645 437,523
Operating segments | Reportable Subsegment | Performance Materials & Chemicals | Performance Materials                      
Segment Reporting, Revenue Reconciling Item [Line Items]                      
Sales                 378,279 324,225 206,522
Operating segments | Reportable Subsegment | Environmental Catalysts & Services | Silica Catalysts                      
Segment Reporting, Revenue Reconciling Item [Line Items]                      
Sales                 72,099 75,333 53,029
Operating segments | Reportable Subsegment | Environmental Catalysts & Services | Refining Services                      
Segment Reporting, Revenue Reconciling Item [Line Items]                      
Sales                 455,562 398,342 373,718
Operating segments | Eliminations | Performance Materials & Chemicals                      
Segment Reporting, Revenue Reconciling Item [Line Items]                      
Sales                 (11,798) (10,021) (5,094)
Inter-segment sales eliminations                      
Segment Reporting, Revenue Reconciling Item [Line Items]                      
Sales                 (3,323) $ (3,423) $ (1,521)
Inter-segment sales eliminations | Performance Materials & Chemicals                      
Segment Reporting, Revenue Reconciling Item [Line Items]                      
Sales                 0    
Inter-segment sales eliminations | Environmental Catalysts & Services                      
Segment Reporting, Revenue Reconciling Item [Line Items]                      
Sales                 $ (3,323)