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CLOSURE AND POST-CLOSURE LIABILITIES - Changes in Post-Closure Liabilities (Details) $ in Thousands | 12 Months Ended
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Dec. 31, 2021 USD ($) | Dec. 31, 2020 USD ($) landfill_site
Changes to post-closure liabilities |  |
Balance at the beginning of the period | $ 87,926 | $ 75,651
Liabilities assumed in acquisitions | 1,446 | 265
New asset retirement obligations | 2,443 | 2,101
Accretion | 7,357 | 6,653
Changes in estimates recorded to consolidated statement of operations | 2,683 | 6,568
Changes in estimates recorded to consolidated balance sheet | 3,712 | 682
Expenditures | (6,602) | (4,198)
Currency translation and other | 138 | 204
Balance at the end of the period | 99,103 | $ 87,926
Number of landfill sites closed during period | landfill_site |  | 2
Increase in facility closure costs | 2,300 | $ 6,800
Landfill Retirement Liability |  |
Changes to post-closure liabilities |  |
Balance at the beginning of the period | 48,412 | 39,401
Liabilities assumed in acquisitions | 0 | 0
New asset retirement obligations | 2,443 | 2,101
Accretion | 3,655 | 3,254
Changes in estimates recorded to consolidated statement of operations | 2,287 | 6,465
Changes in estimates recorded to consolidated balance sheet | 2,297 | 481
Expenditures | (5,818) | (3,445)
Currency translation and other | 149 | 155
Balance at the end of the period | 53,425 | 48,412
Non-Landfill Retirement Liability |  |
Changes to post-closure liabilities |  |
Balance at the beginning of the period | 39,514 | 36,250
Liabilities assumed in acquisitions | 1,446 | 265
New asset retirement obligations | 0 | 0
Accretion | 3,702 | 3,399
Changes in estimates recorded to consolidated statement of operations | 396 | 103
Changes in estimates recorded to consolidated balance sheet | 1,415 | 201
Expenditures | (784) | (753)
Currency translation and other | (11) | 49
Balance at the end of the period | $ 45,678 | $ 39,514

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- Definition Represents the amount of change in the asset retirement obligation, during the current period for other changes in estimates recorded in the balance sheet. + References No definition available. + Details
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- Definition The amount of change in the asset retirement obligation, during the current period, for changes in estimates recorded in the statement of income. + References No definition available. + Details
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- Definition Asset Retirement Obligation, Changes Recorded In Statement Of Income, Related To Increased Facility Closure Costs + References No definition available. + Details
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- Definition Amount of asset retirement obligations settled, or otherwise disposed of, during the period. This may include asset retirement obligations transferred to third parties associated with the sale of a long-lived asset. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 410 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (c)(2) -URI http://asc.fasb.org/extlink&oid=6392692&loc=d3e7535-110849 + Details
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