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SEGMENT REPORTING (Tables) | 3 Months Ended
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Mar. 31, 2024
Segment Reporting [Abstract] |
Schedule of Reconciliation of Third Party Revenues to Direct Revenues | The following tables reconcile third-party revenues to direct revenues for the three months ended March 31, 2024 and 2023 (in thousands):
| Three Months Ended |  | Three Months Ended
| March 31, 2024 |  | March 31, 2023
| Third-Party Revenues |  | Intersegment Revenues (Expenses), net |  |  |  | Direct Revenues |  | Third-Party Revenues |  | Intersegment Revenues (Expenses), net |  | Direct Revenues
Environmental Services | $ | 1,161,279 |  |  | $ | 11,231 |  |  |  |  | $ | 1,172,510 |  |  | $ | 1,060,982 |  |  | $ | 9,759 |  |  | $ | 1,070,741 |
Safety-Kleen Sustainability Solutions | 215,314 |  |  | (11,231) |  |  |  |  | 204,083 |  |  | 246,298 |  |  | (9,759) |  |  | 236,539 |
Corporate Items | 102 |  |  | — |  |  |  |  | 102 |  |  | 107 |  |  | — |  |  | 107 |
Total | $ | 1,376,695 |  |  | $ | — |  |  |  |  | $ | 1,376,695 |  |  | $ | 1,307,387 |  |  | $ | — |  |  | $ | 1,307,387 |
Schedule of Reconciliation to Consolidated Statements of Income to Adjusted EBITDA | The following table presents Adjusted EBITDA information used by management by reported segment (in thousands):
|  |  | Three Months Ended
|  |  | March 31,
|  |  |  |  | 2024 |  | 2023
Adjusted EBITDA: |  |  |  |  |  |  |
Environmental Services |  |  |  |  | $ | 264,475 |  |  | $ | 228,345 |
Safety-Kleen Sustainability Solutions |  |  |  |  | 29,700 |  |  | 41,463 |
Corporate Items |  |  |  |  | (64,080) |  |  | (54,670) |
Total |  |  |  |  | 230,095 |  |  | 215,138 |
Reconciliation to Consolidated Statements of Operations: |  |  |  |  |  |  |
Accretion of environmental liabilities |  |  |  |  | 3,217 |  |  | 3,407 |
Stock-based compensation |  |  |  |  | 6,338 |  |  | 6,018 |
Depreciation and amortization |  |  |  |  | 95,065 |  |  | 84,758 |
Income from operations |  |  |  |  | 125,475 |  |  | 120,955 |
Other expense (income), net |  |  |  |  | 1,141 |  |  | (116) |
Loss on early extinguishment of debt |  |  |  |  | — |  |  | 2,362 |
Interest expense, net of interest income |  |  |  |  | 28,539 |  |  | 20,632 |
Income before provision for income taxes |  |  |  |  | $ | 95,795 |  |  | $ | 98,077 |

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- Definition Tabular disclosure of all significant reconciling items in the reconciliation of total revenues from reportable segments to the entity's consolidated revenues. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 31 -Publisher FASB -URI https://asc.fasb.org//1943274/2147482810/280-10-50-31 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 30 -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org//1943274/2147482810/280-10-50-30 + Details
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