Annual report pursuant to Section 13 and 15(d)

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

v3.22.4
Reportable Segments - Summary Financial Information by Reportable Segment (Details) - USD ($)
$ in Thousands
 3 Months Ended 12 Months Ended
Dec. 31, 2022
Sep. 30, 2022
Jun. 30, 2022
Mar. 31, 2022
Dec. 31, 2021
Sep. 30, 2021
Jun. 30, 2021
Mar. 31, 2021
Dec. 31, 2022
Dec. 31, 2021
Dec. 31, 2020
Segment Reporting, Revenue Reconciling Item [Line Items]                      
Sales $ 182,740 $ 232,533 $ 225,172 $ 179,714 $ 170,197 $ 167,428 $ 146,952 $ 126,624 $ 820,159 $ 611,201 $ 495,920
Adjusted EBITDA from reportable segments                 305,738 265,700 231,702
Equity in net income from affiliated companies                 27,725 27,737 21,065
Amortization of investment in affiliate step-up                 (6,402) (6,480)  
Ecoservices                      
Segment Reporting, Revenue Reconciling Item [Line Items]                      
Sales                 702,472 500,513 401,913
Adjusted EBITDA from reportable segments                 227,760 177,672 157,198
Catalyst Technologies                      
Segment Reporting, Revenue Reconciling Item [Line Items]                      
Sales                 117,687 110,688 94,007
Adjusted EBITDA from reportable segments                 77,978 88,028 74,504
Zeolyst Joint Venture | Catalyst Technologies                      
Segment Reporting, Revenue Reconciling Item [Line Items]                      
Sales                 132,588 131,332 128,623
Adjusted EBITDA from reportable segments                 50,331 49,872 42,515
Equity in net income from affiliated companies                 27,931 27,827 21,157
Amortization of investment in affiliate step-up                 6,403 6,480 6,634
Joint venture depreciation, amortization and interest                 $ 15,997 $ 15,565 $ 14,724