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SEGMENT REPORTING - Segment Information, Revenues, EBITA, and Reconciliation to the Consolidated Statement of Operations (Details) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2022 | Dec. 31, 2021 | Dec. 31, 2020
Segment Reporting Information [Line Items] |  |  |
Total revenues | $ 5,166,605 | $ 3,805,566 | $ 3,144,097
Adjusted EBITDA | 1,022,128 | 676,606 | 573,804
Reconciliation to Consolidated Statements of Operations: |  |  |
Accretion of environmental liabilities | 12,943 | 11,745 | 11,051
Stock-based compensation | 26,844 | 18,839 | 18,502
Depreciation and amortization | 347,594 | 298,135 | 292,915
Income from operations | 634,747 | 347,887 | 251,336
Other (income) expense, net | (2,472) | 515 | 290
Loss on early extinguishment of debt | 422 | 0 | 0
(Gain) loss on sale of businesses | (8,864) | 0 | 3,376
Interest expense, net of interest income | 107,663 | 77,657 | 73,120
Income from operations before provision for income taxes | 537,998 | 269,715 | 174,550
Property, plant and equipment, net | 1,980,302 | 1,863,175 |
Goodwill | 1,246,878 | 1,227,042 | 527,023
Permits and other intangibles, net | 620,782 | 644,912 |
Permits and other intangibles, net | 1,867,660 | 1,871,954 |
Environmental Services |  |  |
Segment Reporting Information [Line Items] |  |  |
Total revenues | 4,171,706 | 3,032,454 | 2,635,901
Reconciliation to Consolidated Statements of Operations: |  |  |
Goodwill | 1,071,846 | 1,085,534 | 401,918
Safety-Kleen Sustainability Solutions |  |  |
Segment Reporting Information [Line Items] |  |  |
Total revenues | 994,392 | 772,813 | 507,906
Reconciliation to Consolidated Statements of Operations: |  |  |
Goodwill | 175,032 | 141,508 | 125,105
Operating segments | Environmental Services |  |  |
Segment Reporting Information [Line Items] |  |  |
Total revenues | 4,144,973 | 3,025,907 | 2,637,641
Adjusted EBITDA | 953,053 | 659,718 | 665,918
Reconciliation to Consolidated Statements of Operations: |  |  |
Property, plant and equipment, net | 1,467,641 | 1,374,913 |
Goodwill | 1,071,846 | 1,085,534 |
Permits and other intangibles, net | 462,050 | 498,739 |
Permits and other intangibles, net | 1,533,896 | 1,584,273 |
Operating segments | Safety-Kleen Sustainability Solutions |  |  |
Segment Reporting Information [Line Items] |  |  |
Total revenues | 1,021,125 | 779,360 | 506,166
Adjusted EBITDA | 306,327 | 227,354 | 83,214
Reconciliation to Consolidated Statements of Operations: |  |  |
Property, plant and equipment, net | 398,660 | 373,721 |
Goodwill | 175,032 | 141,508 |
Permits and other intangibles, net | 158,732 | 146,173 |
Permits and other intangibles, net | 333,764 | 287,681 |
Intersegment revenues (expense), net | Environmental Services |  |  |
Segment Reporting Information [Line Items] |  |  |
Total revenues | 26,733 | 6,547 | (1,740)
Intersegment revenues (expense), net | Safety-Kleen Sustainability Solutions |  |  |
Segment Reporting Information [Line Items] |  |  |
Total revenues | (26,733) | (6,547) | 1,740
Corporate Items |  |  |
Segment Reporting Information [Line Items] |  |  |
Total revenues | 507 | 299 | 290
Adjusted EBITDA | (237,252) | (210,466) | (175,328)
Reconciliation to Consolidated Statements of Operations: |  |  |
Property, plant and equipment, net | 114,001 | 114,541 |
Operating segments and corporate non segment |  |  |
Segment Reporting Information [Line Items] |  |  |
Total revenues | $ 507 | $ 299 | $ 290

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