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Acquisitions | 6 Months Ended
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Jun. 30, 2026
Business Combinations [Abstract] |
Acquisitions | 7.ACQUISITIONS The Company acquired six immaterial non-hazardous solid waste collection, transfer and recycling businesses and two immaterial E&P waste treatment and disposal businesses during the six months ended June 30, 2026. The total transaction-related expenses incurred during the six months ended June 30, 2026 for these acquisitions were $9,948. These expenses are included in Selling, general and administrative expenses in the Company’s Condensed Consolidated Statements of Net Income. The Company acquired 10 immaterial non-hazardous solid waste collection and recycling businesses and two immaterial E&P waste treatment and disposal businesses during the six months ended June 30, 2025. The total transaction-related expenses incurred during the six months ended June 30, 2025 for these acquisitions were $15,943. These expenses are included in Selling, general and administrative expenses in the Company’s Condensed Consolidated Statements of Net Income. The results of operations of the acquired businesses have been included in the Company’s Condensed Consolidated Financial Statements from their respective acquisition dates. The Company expects these acquired businesses to contribute towards the achievement of the Company’s strategy to expand through acquisitions. Goodwill acquired is attributable to the synergies and ancillary growth opportunities expected to arise after the Company’s acquisition of these businesses. The following table summarizes the consideration transferred to acquire these businesses and the preliminary amounts of identifiable assets acquired and liabilities assumed at the acquisition dates for the acquisitions consummated in the six months ended June 30, 2026 and 2025: ​
​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ ​ ​ | 2026 | ​ ​ ​ | 2025
​ | ​ | Acquisitions | ​ | Acquisitions
Fair value of consideration transferred: |  | ​ | ​ |  | ​ | ​
Cash | ​ | $ | 309,644 | ​ | $ | 510,738
Debt assumed | ​ |  | 1,878 | ​ |  | 71,557
Contingent consideration | ​ |  | 1,578 | ​ | ​ | 10,864
​ | ​ |  | 313,100 | ​ |  | 593,159
​ | ​ | ​ | ​ | ​ | ​ | ​
Recognized amounts of identifiable assets acquired and liabilities assumed associated with businesses acquired: | ​ |  | ​ | ​ |  | ​
Accounts receivable | ​ |  | 10,313 | ​ | ​ | 18,254
Prepaid expenses and other current assets | ​ |  | 351 | ​ | ​ | 2,435
Operating lease right-of-use assets | ​ | ​ | 612 | ​ | ​ | 10,381
Property and equipment | ​ |  | 189,080 | ​ | ​ | 273,661
Long-term franchise agreements and contracts | ​ |  | 24,424 | ​ | ​ | 28,604
Customer lists | ​ |  | 9,836 | ​ | ​ | 42,858
Permits and other intangibles | ​ | ​ | 37,331 | ​ | ​ | 86,314
Accounts payable and accrued liabilities | ​ |  | (13,840) | ​ | ​ | (10,071)
Current portion of operating lease liabilities | ​ | ​ | (128) | ​ | ​ | (221)
Deferred revenue | ​ |  | (3,288) | ​ | ​ | (3,251)
Long-term portion of operating lease liabilities | ​ | ​ | (484) | ​ | ​ | (1,012)
Other long-term liabilities | ​ |  | (8,744) | ​ | ​ | (2,250)
Deferred income taxes | ​ |  | — | ​ | ​ | (18,255)
Total identifiable net assets | ​ |  | 245,463 | ​ |  | 427,447
Goodwill | ​ | $ | 67,637 | ​ | $ | 165,712
​ Of the goodwill acquired during the six months ended June 30, 2026 and 2025, a total of $67,637 and $117,571, respectively, is expected to be deductible for tax purposes. The fair value of acquired working capital related to five immaterial acquisitions completed during the twelve months ended June 30, 2026, is provisional pending receipt of information from the acquirees to support the fair value of the assets acquired and liabilities assumed. Any adjustments recorded relating to finalizing the working capital for these five acquisitions are not expected to be material to the Company’s financial position. The adjustments recorded during the six months ended June 30, 2026 relating to finalizing the acquired working capital for the immaterial acquisitions completed during the twelve months ended December 31, 2025 were not material to the Company’s financial position. The gross amount of trade receivables due under contracts acquired during the six months ended June 30, 2026, was $10,915, of which $602 was expected to be uncollectible. The gross amount of trade receivables due under contracts acquired during the six months ended June 30, 2025, was $18,687, of which $433 was expected to be uncollectible. The Company did not acquire any other class of receivable as a result of the acquisition of these businesses.

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