Annual report pursuant to Section 13 and 15(d)

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

v3.8.0.1
Reportable Segments - Summary Financial Information by Reportable Segment (Details) - USD ($)
$ in Thousands
 3 Months Ended 12 Months Ended
Dec. 31, 2017
Sep. 30, 2017
Jun. 30, 2017
Mar. 31, 2017
Dec. 31, 2016
Sep. 30, 2016
Jun. 30, 2016
Mar. 31, 2016
Dec. 31, 2017
Dec. 31, 2016
Dec. 31, 2015
Segment Reporting, Revenue Reconciling Item [Line Items]                      
Sales $ 358,074 $ 391,829 $ 389,267 $ 332,931 $ 322,731 $ 369,979 $ 277,554 $ 93,913 $ 1,472,101 $ 1,064,177 $ 388,875
Segment Adjustment EBITDA                 294,590 198,898 94,774
Equity in net income (loss) from affiliated companies                 38,772 (2,612) 0
Environmental Catalysts & Services | Zeolyst Joint Venture                      
Segment Reporting, Revenue Reconciling Item [Line Items]                      
Segment Adjustment EBITDA                 58,156 40,687  
Equity in net income (loss) from affiliated companies                 46,985 33,716  
Investment in affiliate and inventory step-up amortization                 8,600 36,296  
Joint venture depreciation, amortization, and interest                 11,070 6,920  
Operating segments                      
Segment Reporting, Revenue Reconciling Item [Line Items]                      
Segment Adjustment EBITDA                 483,715 355,504 117,704
Operating segments | Performance Materials & Chemicals                      
Segment Reporting, Revenue Reconciling Item [Line Items]                      
Sales                 1,001,849 638,951 0
Segment Adjustment EBITDA                 240,128 158,679 0
Operating segments | Environmental Catalysts & Services                      
Segment Reporting, Revenue Reconciling Item [Line Items]                      
Sales                 473,675 426,747 388,875
Segment Adjustment EBITDA                 243,587 196,825 117,704
Operating segments | Environmental Catalysts & Services | Zeolyst Joint Venture                      
Segment Reporting, Revenue Reconciling Item [Line Items]                      
Sales                 143,774 94,516  
Operating segments | Reportable Subsegment | Performance Materials & Chemicals | Performance Chemicals                      
Segment Reporting, Revenue Reconciling Item [Line Items]                      
Sales                 687,645 437,523 0
Operating segments | Reportable Subsegment | Performance Materials & Chemicals | Performance Materials                      
Segment Reporting, Revenue Reconciling Item [Line Items]                      
Sales                 324,225 206,522 0
Operating segments | Reportable Subsegment | Environmental Catalysts & Services | Silica Catalysts                      
Segment Reporting, Revenue Reconciling Item [Line Items]                      
Sales                 75,333 53,029 0
Operating segments | Reportable Subsegment | Environmental Catalysts & Services | Refining Services                      
Segment Reporting, Revenue Reconciling Item [Line Items]                      
Sales                 398,342 373,718 388,875
Operating segments | Eliminations | Performance Materials & Chemicals                      
Segment Reporting, Revenue Reconciling Item [Line Items]                      
Sales                 (10,021) (5,094) 0
Inter-segment sales eliminations                      
Segment Reporting, Revenue Reconciling Item [Line Items]                      
Sales                 $ (3,423) $ (1,521) $ 0