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Landfill Accounting (Tables) | 9 Months Ended
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Sep. 30, 2020
Landfill Accounting [Abstract] |
Reconciliation of Final Capping, Closure and Post-Closure Liability Balance | The following is a reconciliation of the Company’s final capping, closure and post-closure liability balance from December 31, 2019 to September 30, 2020: ​
​ | ​ | ​ | ​
Final capping, closure and post-closure liability at December 31, 2019 |  | $ | 291,474
Liability adjustments | ​ |  | (1,861)
Accretion expense associated with landfill obligations | ​ |  | 11,174
Closure payments | ​ |  | (3,257)
Assumption of closure liabilities from acquisitions | ​ | ​ | 2,135
Foreign currency translation adjustment | ​ |  | (1,178)
Final capping, closure and post-closure liability at September 30, 2020 | ​ | $ | 298,487

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- Definition Tabular disclosure of the changes in carrying amount of a liability for asset retirement obligations, for changes such as new obligations, changes in estimates of existing obligations, spending on existing obligations, property dispositions, and foreign currency translation. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 410 -SubTopic 30 -Section 50 -Paragraph 5 -URI http://asc.fasb.org/extlink&oid=6393242&loc=d3e13201-110859 + Details
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