Quarterly report pursuant to Section 13 or 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 9 Months Ended
Sep. 30, 2017
Sep. 30, 2016
Sep. 30, 2017
Sep. 30, 2016
Segment Reporting, Revenue Reconciling Item [Line Items]        
Net sales $ 391,829 $ 369,979 $ 1,114,027 $ 741,446
Segment Adjusted EBITDA 96,835 78,668 271,037 125,567
Equity in net income (loss) from affiliated companies 10,257 (4,616) 24,879 (9,309)
Zeolyst Joint Venture        
Segment Reporting, Revenue Reconciling Item [Line Items]        
Net sales 37,622 28,184 100,991 48,461
Segment Adjusted EBITDA 14,398 10,316 39,690 19,962
Equity in net income (loss) from affiliated companies 10,151 (4,683) 24,594 (9,213)
Investment in affiliate and inventory step-up amortization 1,658 12,291 6,941 24,606
Joint venture depreciation, amortization, and interest 2,563 2,690 8,073 4,534
Operating segments        
Segment Reporting, Revenue Reconciling Item [Line Items]        
Segment Adjusted EBITDA 127,785 120,945 367,319 246,222
Operating segments | Performance Materials & Chemicals        
Segment Reporting, Revenue Reconciling Item [Line Items]        
Net sales 277,072 256,219 765,781 429,867
Segment Adjusted EBITDA 65,885 64,604 184,741 111,178
Operating segments | Environmental Catalysts & Services        
Segment Reporting, Revenue Reconciling Item [Line Items]        
Net sales 115,541 114,271 350,814 312,490
Segment Adjusted EBITDA 61,900 56,341 182,578 135,044
Eliminations        
Segment Reporting, Revenue Reconciling Item [Line Items]        
Net sales $ (784) $ (511) $ (2,568) $ (911)