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SEGMENT REPORTING (Tables) | 6 Months Ended
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Jun. 30, 2019
Segment Reporting [Abstract] |
Reconciliation of third party revenues to direct revenues | The following table reconciles third-party revenues to direct revenues for the three and six months ended June 30, 2019 and June 30, 2018 (in thousands):
| For the Three Months Ended June 30, 2019 |  | For the Three Months Ended June 30, 2018
| Third-party revenues |  | Intersegment revenues, net |  | Corporate Items, net |  | Direct revenues |  | Third-party revenues |  | Intersegment revenues, net |  | Corporate Items, net |  | Direct revenues
Environmental Services | $ | 526,294 |  |  | $ | 36,206 |  |  | $ | 576 |  |  | $ | 563,076 |  |  | $ | 519,916 |  |  | $ | 34,291 |  |  | $ | 607 |  |  | $ | 554,814 |
Safety-Kleen | 342,182 |  |  | (36,206 | ) |  | 8 |  |  | 305,984 |  |  | 328,715 |  |  | (34,291 | ) |  | 11 |  |  | 294,435 |
Corporate Items | 202 |  |  | — |  |  | (584 | ) |  | (382 | ) |  | 509 |  |  | — |  |  | (618 | ) |  | (109 | )
Total | $ | 868,678 |  |  | $ | — |  |  | $ | — |  |  | $ | 868,678 |  |  | $ | 849,140 |  |  | $ | — |  |  | $ | — |  |  | $ | 849,140 |
| For the Six Months Ended June 30, 2019 |  | For the Six Months Ended June 30, 2018
| Third-party revenues |  | Intersegment revenues, net |  | Corporate Items, net |  | Direct revenues |  | Third-party revenues |  | Intersegment revenues, net |  | Corporate Items, net |  | Direct revenues
Environmental Services | $ | 999,992 |  |  | $ | 70,281 |  |  | $ | 1,825 |  |  | $ | 1,072,098 |  |  | $ | 959,604 |  |  | $ | 66,256 |  |  | $ | 1,401 |  |  | $ | 1,027,261 |
Safety-Kleen | 648,729 |  |  | (70,281 | ) |  | 13 |  |  | 578,461 |  |  | 638,633 |  |  | (66,256 | ) |  | 22 |  |  | 572,399 |
Corporate Items | 796 |  |  | — |  |  | (1,838 | ) |  | (1,042 | ) |  | 681 |  |  | — |  |  | (1,423 | ) |  | (742 | )
Total | $ | 1,649,517 |  |  | $ | — |  |  | $ | — |  |  | $ | 1,649,517 |  |  | $ | 1,598,918 |  |  | $ | — |  |  | $ | — |  |  | $ | 1,598,918 |
Reconciliation to consolidated statements of income from adjusted EBITDA | The following table presents Adjusted EBITDA information used by management by reported segment (in thousands):
| For the Three Months Ended |  | For the Six Months Ended
| June 30, |  | June 30,
| 2019 |  | 2018 |  | 2019 |  | 2018
Adjusted EBITDA: |  |  |  |  |  |  |  |  |
Environmental Services | $ | 117,868 |  |  | $ | 109,199 |  |  | $ | 207,378 |  |  | $ | 170,616 |
Safety-Kleen | 79,459 |  |  | 73,069 |  |  | 134,252 |  |  | 134,953 |
Corporate Items | (47,502 | ) |  | (42,707 | ) |  | (90,142 | ) |  | (77,743 | )
Total | 149,825 |  |  | 139,561 |  |  | 251,488 |  |  | 227,826 |
Reconciliation to Consolidated Statements of Operations: |  |  |  |  |  |  |  |  |
Accretion of environmental liabilities | 2,560 |  |  | 2,448 |  |  | 5,134 |  |  | 4,878 |
Depreciation and amortization | 74,217 |  |  | 72,760 |  |  | 149,572 |  |  | 147,604 |
Income from operations | 73,048 |  |  | 64,353 |  |  | 96,782 |  |  | 75,344 |
Other expense (income), net | 564 |  |  | (846 | ) |  | (2,419 | ) |  | (547 | )
Interest expense, net of interest income | 20,215 |  |  | 20,769 |  |  | 39,979 |  |  | 41,039 |
Income before provision for income taxes | $ | 52,269 |  |  | $ | 44,430 |  |  | $ | 59,222 |  |  | $ | 34,852 |
PP&E, intangible assets and total assets by segment | The following table presents certain assets by reportable segment and in the aggregate (in thousands):
| June 30, 2019 |  | December 31, 2018
Property, plant and equipment, net |  |  |
Environmental Services | $ | 956,381 |  |  | $ | 951,867 |
Safety-Kleen | 559,510 |  |  | 553,220 |
Corporate Items | 81,026 |  |  | 56,891 |
Total property, plant and equipment, net | $ | 1,596,917 |  |  | $ | 1,561,978 |
Goodwill and Permits and other intangibles, net |  |  |
Environmental Services |  |  |
Goodwill | $ | 212,808 |  |  | $ | 207,019 |
Permits and other intangibles, net | 93,303 |  |  | 93,313 |
Total Environmental Services | 306,111 |  |  | 300,332 |
Safety-Kleen |  |  |
Goodwill | $ | 312,236 |  |  | $ | 307,170 |
Permits and other intangibles, net | 340,550 |  |  | 348,562 |
Total Safety-Kleen | 652,786 |  |  | 655,732 |
Total | $ | 958,897 |  |  | $ | 956,064 |
Schedule of assets by reported segment | The following table presents the total assets by reportable segment (in thousands):
| June 30, 2019 |  | December 31, 2018
Environmental Services | $ | 1,756,818 |  |  | $ | 1,640,706 |
Safety-Kleen | 1,513,920 |  |  | 1,431,381 |
Corporate Items | 684,583 |  |  | 666,234 |
Total | $ | 3,955,321 |  |  | $ | 3,738,321 |
Total assets by geographical area | The following table presents the total assets by geographical area (in thousands):
| June 30, 2019 |  | December 31, 2018
United States | $ | 3,270,464 |  |  | $ | 3,090,311 |
Canada | 684,857 |  |  | 648,010 |
Total | $ | 3,955,321 |  |  | $ | 3,738,321 |

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