Annual report pursuant to Section 13 and 15(d)

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

v3.24.0.1
Reportable Segments - Summary Financial Information by Reportable Segment (Details) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2023
Dec. 31, 2022
Dec. 31, 2021
Segment Reporting, Revenue Reconciling Item [Line Items]      
Sales $ 691,118 $ 820,159 $ 611,201
Adjusted EBITDA from reportable segments 281,858 305,738 265,700
Equity in net income from affiliated companies 30,624 27,725 27,737
Amortization of investment in affiliate step-up (6,403) (6,402)  
Ecoservices      
Segment Reporting, Revenue Reconciling Item [Line Items]      
Sales 584,845 702,472 500,513
Adjusted EBITDA from reportable segments 199,966 227,760 177,672
Advanced Materials & Catalysts      
Segment Reporting, Revenue Reconciling Item [Line Items]      
Sales 106,273 117,687 110,688
Adjusted EBITDA from reportable segments 81,892 77,978 88,028
Advanced Materials & Catalysts | Zeolyst Joint Venture      
Segment Reporting, Revenue Reconciling Item [Line Items]      
Sales 156,481 132,588 131,332
Adjusted EBITDA from reportable segments 50,490 50,331 49,872
Equity in net income from affiliated companies 30,695 27,931 27,827
Amortization of investment in affiliate step-up 6,403 6,403 6,480
Joint venture depreciation, amortization and interest $ 13,392 $ 15,997 $ 15,565