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REMEDIAL LIABILITIES - Changes in Remedial Liabilities (Details) - USD ($) $ in Thousands | 12 Months Ended
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Dec. 31, 2021 | Dec. 31, 2020
Changes to remedial liabilities |  |
Balance at the beginning of the period | $ 114,813 | $ 114,173
Accretion | 4,388 | 4,398
Changes in estimates recorded to consolidated statement of operations | 296 | 4,130
Expenditures | (8,904) | (8,203)
Currency translation and other | 64 | 315
Liabilities assumed in acquisitions | 1,216 |
Balance at the end of the period | 111,873 | 114,813
Remedial Liabilities for Landfill Sites |  |
Changes to remedial liabilities |  |
Balance at the beginning of the period | 1,865 | 1,851
Accretion | 90 | 90
Changes in estimates recorded to consolidated statement of operations | (126) | (15)
Expenditures | (49) | (61)
Currency translation and other | 0 | 0
Liabilities assumed in acquisitions | 0 |
Balance at the end of the period | 1,780 | 1,865
Remedial Liabilities for Inactive Sites |  |
Changes to remedial liabilities |  |
Balance at the beginning of the period | 63,060 | 61,991
Accretion | 2,614 | 2,607
Changes in estimates recorded to consolidated statement of operations | (178) | 2,873
Expenditures | (4,889) | (4,332)
Currency translation and other | (820) | (79)
Liabilities assumed in acquisitions | 0 |
Balance at the end of the period | 59,787 | 63,060
Remedial Liabilities (Including Superfund) for Non-Landfill Operations |  |
Changes to remedial liabilities |  |
Balance at the beginning of the period | 49,888 | 50,331
Accretion | 1,684 | 1,701
Changes in estimates recorded to consolidated statement of operations | 600 | 1,272
Expenditures | (3,966) | (3,810)
Currency translation and other | 884 | 394
Liabilities assumed in acquisitions | 1,216 |
Balance at the end of the period | $ 50,306 | $ 49,888

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- Definition The increase or decrease in the accrual for environmental loss contingencies, during the reporting period that is related to currency translations and other adjustments. + References No definition available. + Details
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