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REMEDIAL LIABILITIES (Tables) | 12 Months Ended
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Dec. 31, 2020
Environmental Remediation Obligations [Abstract] |
Schedule of Changes to Remedial Liabilities | The changes to remedial liabilities from January 1, 2019 through December 31, 2020 were as follows (in thousands):
| Remedial Liabilities for Landfill Sites |  | Remedial Liabilities for Inactive Sites |  | Remedial Liabilities (Including Superfund) for Non-Landfill Operations |  | Total
Balance at January 1, 2019 | $ | 1,838 |  |  | $ | 65,315 |  |  | $ | 53,864 |  |  | $ | 121,017 |
Accretion | 88 |  |  | 2,639 |  |  | 1,808 |  |  | 4,535 |
Changes in estimates recorded to consolidated statement of operations | (17) |  |  | (913) |  |  | (2,087) |  |  | (3,017) |
Expenditures | (59) |  |  | (5,079) |  |  | (3,724) |  |  | (8,862) |
Currency translation and other | 1 |  |  | 29 |  |  | 470 |  |  | 500 |
Balance at December 31, 2019 | 1,851 |  |  | 61,991 |  |  | 50,331 |  |  | 114,173 |
Accretion | 90 |  |  | 2,607 |  |  | 1,701 |  |  | 4,398 |
Changes in estimates recorded to consolidated statement of operations | (15) |  |  | 2,873 |  |  | 1,272 |  |  | 4,130 |
Expenditures | (61) |  |  | (4,332) |  |  | (3,810) |  |  | (8,203) |
Currency translation and other | — |  |  | (79) |  |  | 394 |  |  | 315 |
Balance at December 31, 2020 | $ | 1,865 |  |  | $ | 63,060 |  |  | $ | 49,888 |  |  | $ | 114,813 |
Remedial Liabilities Anticipated Payments for Each of the Next Five Years | Anticipated payments at December 31, 2020 (based on current estimated costs and anticipated timing of necessary regulatory approvals to commence work on remedial activities) for each of the next five years and thereafter were as follows (in thousands):
Year ending December 31, |
2021 | $ | 12,718 |
2022 | 19,275 |
2023 | 11,420 |
2024 | 9,073 |
2025 | 6,526 |
Thereafter | 75,915 |
Undiscounted remedial liabilities | 134,927 |
Less: Discount | (20,114) |
Total remedial liabilities | $ | 114,813 |
Schedule of Environmental Exit Costs by Cost | The following tables show, respectively, (i) the amounts of such estimated liabilities associated with the types of facilities and sites involved and (ii) the amounts of such estimated liabilities associated with each facility or site which represents at least 5% of the total and with all other facilities and sites as a group and as of December 31, 2020. Estimates based on type of facility or site (in thousands, except percentages):
Type of Facility or Site | Remedial Liability |  | % of Total |  | Reasonably Possible Additional Liabilities (1)
Facilities now used in active conduct of the Company's business (37 facilities) | $ | 42,151 |  |  | 36.7 | % |  | $ | 10,565 |
Inactive facilities not now used in active conduct of the Company's business but most of which were acquired because the assumption of remedial liabilities for such facilities was part of the purchase price for the CSD assets (27 facilities) | 63,060 |  |  | 54.9 |  |  | 10,716 |
Superfund sites (16 sites) | 9,602 |  |  | 8.4 |  |  | 960 |
Total | $ | 114,813 |  |  | 100.0 | % |  | $ | 22,241 |
___________________________________ (1)Amounts represent the high end of the range of management's best estimate of the reasonably possible additional liabilities. Estimates based on amount of potential liability (in thousands, except percentages):
Location | Type of Facility or Site |  | Remedial Liability(1) |  | % of Total |  | Reasonably Possible Additional Liabilities(2)
Baton Rouge, LA | Closed incinerator and landfill |  | $ | 25,650 |  |  | 22.3 | % |  | $ | 4,208 |
Bridgeport, NJ | Closed incinerator |  | 17,832 |  |  | 15.5 |  |  | 2,510 |
Mercier, Quebec | Idled incinerator and legal proceedings |  | 11,158 |  |  | 9.7 |  |  | 1,157 |
Linden, NJ | Operating solvent recycling center |  | 7,220 |  |  | 6.3 |  |  | 758 |
Various | All other incinerators, landfills, wastewater treatment facilities and service centers (60 facilities) |  | 43,351 |  |  | 37.8 |  |  | 12,648 |
Various | Superfund sites (each representing less than 5% of total liabilities) (16 sites) |  | 9,602 |  |  | 8.4 |  |  | 960 |
Total |  |  | $ | 114,813 |  |  | 100.0 | % |  | $ | 22,241 |
_________________________________ (1)$24.0 million of the $114.8 million remedial liabilities include estimates related to the legal and administrative proceedings discussed in Note 17, "Commitments and Contingencies," as well as other such estimated remedial liabilities. (2)Amounts represent the high end of the range of management's best estimate of the reasonably possible additional liabilities.

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