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Intangible Assets, Net | 6 Months Ended
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Jun. 30, 2026
Goodwill and Intangible Assets Disclosure [Abstract] |
Intangible Assets, Net | 8.INTANGIBLE ASSETS, NET Intangible assets, exclusive of goodwill, consisted of the following at June 30, 2026: ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ ​ ​ | Gross | ​ ​ ​ | ​ | ​ | ​ ​ ​ | Accumulated | ​ ​ ​ | Net
​ | ​ | Carrying | ​ | Accumulated | ​ | Impairment | ​ | Carrying
​ | ​ | Amount | ​ | Amortization | ​ | Loss | ​ | Amount
Finite-lived intangible assets: |  | ​ | ​ |  | ​ | ​ |  | ​ | ​ |  | ​ | ​
Long-term franchise agreements and contracts | ​ | $ | 1,149,323 | ​ | $ | (489,023) | ​ | $ | — | ​ | $ | 660,300
Customer lists | ​ |  | 1,099,148 | ​ |  | (836,379) | ​ |  | — | ​ |  | 262,769
Permits and other | ​ |  | 1,146,318 | ​ |  | (211,348) | ​ |  | (66,188) | ​ |  | 868,782
​ | ​ |  | 3,394,789 | ​ |  | (1,536,750) | ​ |  | (66,188) | ​ |  | 1,791,851
Indefinite-lived intangible assets: | ​ |  | ​ | ​ |  | ​ | ​ |  | ​ | ​ |  | ​
Solid waste collection and transportation permits | ​ |  | 181,613 | ​ |  | — | ​ |  | — | ​ |  | 181,613
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Intangible assets, exclusive of goodwill | ​ | $ | 3,576,402 | ​ | $ | (1,536,750) | ​ | $ | (66,188) | ​ | $ | 1,973,464
​ The weighted-average amortization period of long-term franchise agreements and contracts acquired during the six months ended June 30, 2026 was 9.5 years. The weighted-average amortization period of customer lists acquired during the six months ended June 30, 2026 was 10.9 years. The weighted-average amortization period of finite-lived permits and other acquired during the six months ended June 30, 2026 was 34.2 years. Intangible assets, exclusive of goodwill, consisted of the following at December 31, 2025: ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ ​ ​ | Gross | ​ ​ ​ | ​ | ​ | ​ ​ ​ | Accumulated | ​ ​ ​ | Net
​ | ​ | Carrying | ​ | Accumulated | ​ | Impairment | ​ | Carrying
​ | ​ | Amount | ​ | Amortization | ​ | Loss | ​ | Amount
Finite-lived intangible assets: |  | ​ | ​ |  | ​ | ​ |  | ​ | ​ |  | ​ | ​
Long-term franchise agreements and contracts | ​ | $ | 1,131,332 | ​ | $ | (457,664) | ​ | $ | — | ​ | $ | 673,668
Customer lists | ​ |  | 1,098,172 | ​ |  | (798,973) | ​ |  | — | ​ |  | 299,199
Permits and other | ​ |  | 1,114,690 | ​ |  | (196,782) | ​ |  | (66,188) | ​ |  | 851,720
​ | ​ |  | 3,344,194 | ​ |  | (1,453,419) | ​ |  | (66,188) | ​ |  | 1,824,587
Indefinite-lived intangible assets: | ​ |  | ​ | ​ |  | ​ | ​ |  | ​ | ​ |  | ​
Solid waste collection and transportation permits | ​ |  | 181,613 | ​ |  | — | ​ |  | — | ​ |  | 181,613
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Intangible assets, exclusive of goodwill | ​ | $ | 3,525,807 | ​ | $ | (1,453,419) | ​ | $ | (66,188) | ​ | $ | 2,006,200
​ Estimated future amortization expense for the next five years relating to finite-lived intangible assets owned as of June 30, 2026 is as follows: ​
​ | ​ | ​ | ​
For the year ending December 31, 2026 | ​ ​ ​ | $ | 190,506
For the year ending December 31, 2027 | ​ | $ | 168,812
For the year ending December 31, 2028 | ​ | $ | 149,310
For the year ending December 31, 2029 | ​ | $ | 134,163
For the year ending December 31, 2030 | ​ | $ | 120,028
​ ​ ​

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- Definition The entire disclosure for intangible asset. Includes, but is not limited to, finite- and indefinite-lived intangible assets, capitalized cost for internal-use software and software to be sold, leased, or marketed. Excludes goodwill. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 985 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Publisher FASB -URI https://asc.fasb.org/1943274/2147481283/985-20-50-2 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 210 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(15)) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480566/210-10-S99-1 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Topic 350 -SubTopic 30 -Name Accounting Standards Codification -Publisher FASB -URI https://asc.fasb.org/350-30/tableOfContent Reference 4: http://www.xbrl.org/2003/role/disclosureRef -Topic 350 -SubTopic 30 -Name Accounting Standards Codification -Section 50 -Paragraph 4 -Publisher FASB -URI https://asc.fasb.org/1943274/2147482665/350-30-50-4 Reference 5: http://www.xbrl.org/2003/role/disclosureRef -Topic 350 -SubTopic 30 -Name Accounting Standards Codification -Section 50 -Paragraph 3 -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482665/350-30-50-3 Reference 6: http://www.xbrl.org/2003/role/disclosureRef -Topic 985 -SubTopic 20 -Name Accounting Standards Codification -Publisher FASB -URI https://asc.fasb.org/985-20/tableOfContent + Details
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