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Intangible Assets, Net
 3 Months Ended
Mar. 31, 2025
Goodwill and Intangible Assets Disclosure [Abstract]  
Intangible Assets, Net

8.INTANGIBLE ASSETS, NET

Intangible assets, exclusive of goodwill, consisted of the following at March 31, 2025:

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Gross

    

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Accumulated

    

Net

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​

Carrying

​

Accumulated

​

Impairment

​

Carrying

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Amount

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Amortization

​

Loss

​

Amount

Finite-lived intangible assets:

 

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Long-term franchise agreements and contracts

​

$

1,127,530

​

$

(414,406)

​

$

—

​

$

713,124

Customer lists

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1,024,163

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(716,336)

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—

​

 

307,827

Permits and other

​

 

1,077,247

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(171,763)

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(40,784)

​

 

864,700

​

​

 

3,228,940

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(1,302,505)

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(40,784)

​

 

1,885,651

Indefinite-lived intangible assets:

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​

 

  

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Solid waste collection and transportation permits

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181,613

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—

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—

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181,613

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Intangible assets, exclusive of goodwill

​

$

3,410,553

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$

(1,302,505)

​

$

(40,784)

​

$

2,067,264

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The weighted-average amortization period of long-term franchise agreements and contracts acquired during the three months ended March 31, 2025 was 8.5 years. The weighted-average amortization period of customer lists acquired during the three months ended March 31, 2025 was 10.2 years.  The weighted-average amortization period of finite-lived permits and other acquired during the three months ended March 31, 2025 was 37.2 years.

Intangible assets, exclusive of goodwill, consisted of the following at December 31, 2024:

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​

​

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​

​

    

Gross

    

​

​

    

Accumulated

    

Net

​

​

Carrying

​

Accumulated

​

Impairment

​

Carrying

​

​

Amount

​

Amortization

​

Loss

​

Amount

Finite-lived intangible assets:

 

​

  

 

​

  

 

​

  

 

​

  

Long-term franchise agreements and contracts

​

$

1,104,585

​

$

(400,674)

​

$

—

​

$

703,911

Customer lists

​

 

1,005,355

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(693,594)

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—

​

 

311,761

Permits and other

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999,357

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(164,239)

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(40,784)

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794,334

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​

 

3,109,297

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(1,258,507)

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(40,784)

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1,810,006

Indefinite-lived intangible assets:

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​

 

  

​

 

  

​

 

  

Solid waste collection and transportation permits

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181,613

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—

​

 

—

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181,613

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Intangible assets, exclusive of goodwill

​

$

3,290,910

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$

(1,258,507)

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$

(40,784)

​

$

1,991,619

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Estimated future amortization expense for the next five years relating to finite-lived intangible assets owned as of March 31, 2025 is as follows:

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For the year ending December 31, 2025

    

$

194,886

For the year ending December 31, 2026

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$

172,070

For the year ending December 31, 2027

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$

150,608

For the year ending December 31, 2028

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$

133,744

For the year ending December 31, 2029

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$

120,860

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​