v3.25.2
SEGMENT REPORTING - Adjusted EBITDA and Significant Segment Expense Information (Details) - USD ($)
$ in Thousands
 3 Months Ended 6 Months Ended
Jun. 30, 2025
Jun. 30, 2024
Jun. 30, 2025
Jun. 30, 2024
Segment Reporting Information [Line Items]        
Direct Revenues $ 1,549,854 $ 1,552,719 $ 2,981,804 $ 2,929,414
Cost of Revenues 1,033,497 1,035,542 2,055,381 2,006,612
Selling, General and Administrative Expenses 186,183 197,876 369,030 379,744
Total Reportable Segments        
Segment Reporting Information [Line Items]        
Direct Revenues 1,549,765 1,552,620 2,981,618 2,929,213
Cost of Revenues 1,021,438 1,024,139 2,038,818 1,991,924
Selling, General and Administrative Expenses 113,820 117,090 225,450 231,723
Total Reportable Segment Adjusted EBITDA 414,507 411,391 717,350 705,566
Environmental Services        
Segment Reporting Information [Line Items]        
Direct Revenues 1,352,035 1,309,383 2,561,148 2,481,893
Cost of Revenues 880,871 853,705 1,720,813 1,666,603
Selling, General and Administrative Expenses 94,970 95,763 189,550 190,900
Total Reportable Segment Adjusted EBITDA 376,194 359,915 650,785 624,390
Safety-Kleen Sustainability Solutions        
Segment Reporting Information [Line Items]        
Direct Revenues 197,730 243,237 420,470 447,320
Cost of Revenues 140,567 170,434 318,005 325,321
Selling, General and Administrative Expenses 18,850 21,327 35,900 40,823
Total Reportable Segment Adjusted EBITDA $ 38,313 $ 51,476 $ 66,565 $ 81,176