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INCOME TAXES (Tables) | 12 Months Ended
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Dec. 31, 2024
Income Tax Disclosure [Abstract] |
Schedule of Income before Income Tax, Domestic and Foreign | The domestic and foreign components of income before provision for income taxes were as follows (in thousands):
| For the years ended December 31,
| 2024 |  | 2023 |  | 2022
Domestic | $ | 444,118 |  |  | $ | 401,912 |  |  | $ | 406,206 |
Foreign | 89,325 |  |  | 101,367 |  |  | 131,792 |
Total | $ | 533,443 |  |  | $ | 503,279 |  |  | $ | 537,998 |
Schedule of Components of Provision for Income Taxes | The provision for income taxes consisted of the following (in thousands, except percentages):
| For the years ended December 31,
| 2024 |  | 2023 |  | 2022
Current: |  |  |  |  |
Federal | $ | 68,321 |  |  | $ | 64,164 |  |  | $ | 52,237 |
State | 27,649 |  |  | 25,496 |  |  | 26,980 |
Foreign | 16,737 |  |  | 23,078 |  |  | 29,488 |
| 112,707 |  |  | 112,738 |  |  | 108,705 |
Deferred |  |  |  |  |
Federal | 20,669 |  |  | 18,251 |  |  | 32,199 |
State | (4,415) |  |  | (9,049) |  |  | (2,432) |
Foreign | 2,183 |  |  | 3,483 |  |  | (12,218) |
| 18,437 |  |  | 12,685 |  |  | 17,549 |
Provision for income taxes | $ | 131,144 |  |  | $ | 125,423 |  |  | $ | 126,254 |
Effective tax rate | 24.6% |  | 24.9% |  | 23.5%
Schedule of Effective Income Tax Rate Reconciliation | The Company's effective income tax rate varied from the amount computed using the statutory federal income tax rate of 21% as follows (in thousands):
| For the years ended December 31,
| 2024 |  | 2023 |  | 2022
Tax expense at U.S. statutory rate | $ | 112,023 |  |  | $ | 105,689 |  |  | $ | 112,980 |
State income taxes, net of federal benefit | 18,555 |  |  | 18,067 |  |  | 19,831 |
Foreign rate differential | 3,965 |  |  | 4,213 |  |  | 6,196 |
Valuation allowance | (6,485) |  |  | (7,699) |  |  | (18,769) |
Uncertain tax position interest and penalties | (1,773) |  |  | (7) |  |  | (2,454) |
Tax credits | 2,694 |  |  | 1,653 |  |  | 2,768 |
Non-deductible compensation | 2,211 |  |  | 2,898 |  |  | 2,754 |
Other | (46) |  |  | 609 |  |  | 2,948 |
Provision for income taxes | $ | 131,144 |  |  | $ | 125,423 |  |  | $ | 126,254 |
Schedule of Deferred Tax Assets and Liabilities | The components of the total net deferred tax assets and liabilities as of December 31, 2024 and 2023 were as follows (in thousands):
| 2024 |  | 2023
Deferred tax assets: |  |  |
Provision for doubtful accounts | $ | 14,808 |  |  | $ | 10,882 |
Closure, post-closure and remedial liabilities | 32,189 |  |  | 31,944 |
Operating lease liabilities | 60,929 |  |  | 46,784 |
Accrued expenses | 14,749 |  |  | 14,963 |
Accrued compensation and benefits | 16,876 |  |  | 15,058 |
Net operating loss carryforwards(1) | 48,331 |  |  | 39,042 |
Excess business interest(2) | 22,078 |  |  | — |
Tax credit carryforwards | 2,619 |  |  | 6,531 |
Stock-based compensation | 4,877 |  |  | 3,516 |
Other | 2,565 |  |  | 4,843 |
Total deferred tax assets | 220,021 |  |  | 173,563 |
Deferred tax liabilities: |  |  |
Property, plant and equipment | (311,546) |  |  | (284,997) |
Operating lease right-of-use assets | (59,999) |  |  | (46,584) |
Interest rate swap asset | (8,748) |  |  | (9,576) |
Permits and other intangible assets | (158,905) |  |  | (130,391) |
Prepaid expenses | (10,881) |  |  | (12,372) |
Total deferred tax liabilities | (550,079) |  |  | (483,920) |
Total net deferred tax liability before valuation allowance | (330,058) |  |  | (310,357) |
Less valuation allowance | (27,232) |  |  | (35,272) |
Net deferred tax liabilities | $ | (357,290) |  |  | $ | (345,629) |
___________________________________ (1)As of December 31, 2024, the net operating loss carryforwards included (i) gross state net operating loss carryforwards of $290.7 million which will begin to expire in 2025, (ii) gross federal net operating loss carryforwards of $79.3 million which will begin to expire in 2025 and (iii) gross foreign net operating loss carryforwards of $64.3 million which will begin to expire in 2025. The increase in the state and federal net operating loss carryforward from the prior year is predominately due to assets acquired in the HEPACO transaction. See Note 4, "Business Combinations" for more information on the related transaction. (2)Deferred tax asset acquired in the HEPACO transaction. See Note 4, "Business Combinations" for more information on the related transaction.
Schedule of Valuation Allowance | The components of the total valuation allowance as of December 31, 2024 and 2023 were as follows (in thousands):
| 2024 |  | 2023
Allowance related to: |  |  |
Foreign tax credits | $ | 346 |  |  | $ | 4,422 |
Federal net operating losses | 3,783 |  |  | 3,783 |
State net operating loss carryforwards | 4,734 |  |  | 4,809 |
Foreign net operating loss carryforwards | 14,543 |  |  | 17,464 |
Deferred tax assets of a Canadian subsidiary | 3,521 |  |  | 4,489 |
Realized and unrealized capital losses | 305 |  |  | 305 |
Total valuation allowance | $ | 27,232 |  |  | $ | 35,272 |

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