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ACCRUED FINAL CAPPING, CLOSURE AND POST-CLOSURE COSTS | 3 Months Ended
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Mar. 31, 2026
Asset Retirement Obligation Disclosure [Abstract] |
ACCRUED FINAL CAPPING, CLOSURE AND POST-CLOSURE COSTS | ACCRUED FINAL CAPPING, CLOSURE AND POST-CLOSURE COSTS Accrued final capping, closure and post-closure costs include the current and non-current portion of costs associated with obligations for final capping, closure and post-closure of our landfills. We estimate our future final capping, closure and post-closure costs of our landfills in order to determine the final capping, closure and post-closure expense per ton of waste placed into each landfill. The anticipated time frame for paying these costs varies based on the remaining useful life of each landfill as well as the duration of the post-closure monitoring period. The changes to accrued final capping, closure and post-closure liabilities are as follows:
| Three Months Ended March 31,
| 2026 |  | 2025
Beginning balance | $ | 192,722 |  |  | $ | 172,230 |
Obligations incurred | 2,938 |  |  | 1,698 |
Accretion expense | 3,951 |  |  | 3,654 |
Obligations settled (1) | (781) |  |  | (755) |
Ending balance | $ | 198,830 |  |  | $ | 176,827 |
(1)May include amounts paid and amounts that are being processed through accounts payable as a part of our disbursement cycle.

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- Definition The entire disclosure for an asset retirement obligation and the associated long-lived asset. An asset retirement obligation is a legal obligation associated with the disposal or retirement from service of a tangible long-lived asset that results from the acquisition, construction or development, or the normal operations of a long-lived asset, except for certain obligations of lessees. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 410 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org/1943274/2147481850/410-20-50-1 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 410 -SubTopic 20 -Name Accounting Standards Codification -Publisher FASB -URI https://asc.fasb.org/410-20/tableOfContent Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Name Accounting Standards Codification -Section 50 -Paragraph 2 -SubTopic 20 -Topic 410 -Publisher FASB -URI https://asc.fasb.org/1943274/2147481850/410-20-50-2 + Details
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