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REMEDIAL LIABILITIES (Tables) | 12 Months Ended
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Dec. 31, 2017
Environmental Remediation Obligations [Abstract] |
Changes to Remedial Liabilities | The changes to remedial liabilities from January 1, 2016 through December 31, 2017 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, 2016 | $ | 2,327 |  |  | $ | 63,613 |  |  | $ | 66,052 |  |  | $ | 131,992 |
Liabilities assumed in acquisitions | — |  |  | — |  |  | 2,041 |  |  | 2,041 |
Accretion | 110 |  |  | 2,737 |  |  | 2,227 |  |  | 5,074 |
Changes in estimates recorded to statement of operations | (538 | ) |  | 1,520 |  |  | (2,617 | ) |  | (1,635 | )
Expenditures | (122 | ) |  | (3,893 | ) |  | (5,907 | ) |  | (9,922 | )
Currency translation and other | — |  |  | 174 |  |  | 283 |  |  | 457 |
Balance at December 31, 2016 | 1,777 |  |  | 64,151 |  |  | 62,079 |  |  | 128,007 |
Measurement period adjustments from prior period acquisitions | — |  |  | — |  |  | 504 |  |  | 504 |
Accretion | 86 |  |  | 2,648 |  |  | 1,978 |  |  | 4,712 |
Changes in estimates recorded to statement of operations | (21 | ) |  | (289 | ) |  | 355 |  |  | 45 |
Expenditures | (42 | ) |  | (3,906 | ) |  | (5,792 | ) |  | (9,740 | )
Currency translation and other | — |  |  | 2,738 |  |  | (1,798 | ) |  | 940 |
Balance at December 31, 2017 | $ | 1,800 |  |  | $ | 65,342 |  |  | $ | 57,326 |  |  | $ | 124,468 |
Remedial Liabilities Anticipated Payments for Each of the Next Five Years | Anticipated payments at December 31, 2017 (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, |
2018 | $ | 14,507 |
2019 | 16,934 |
2020 | 15,259 |
2021 | 10,212 |
2022 | 7,566 |
Thereafter | 83,767 |
Undiscounted remedial liabilities | 148,245 |
Less: Discount | (23,777 | )
Total remedial liabilities | $ | 124,468 |
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, 2017. (10) REMEDIAL LIABILITIES (Continued) Estimates Based on Type of Facility or Site (in thousands):
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 (44 facilities) | $ | 54,193 |  |  | 43.5 | % |  | $ | 11,747 |
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 (38 facilities) | 62,706 |  |  | 50.4 |  |  | 10,549 |
Superfund sites owned by third parties (16 sites) | 7,569 |  |  | 6.1 |  |  | 757 |
Total | $ | 124,468 |  |  | 100.0 | % |  | $ | 23,053 |
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(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):
Location | Type of Facility or Site |  | Remedial Liability |  | % of Total |  | Reasonably Possible Additional Liabilities(1)
Baton Rouge, LA(2) | Closed incinerator and landfill |  | $ | 23,357 |  |  | 18.8 | % |  | $ | 3,938 |
Bridgeport, NJ | Closed incinerator |  | 18,394 |  |  | 14.8 |  |  | 2,534 |
Mercier, Quebec(2) | Idled incinerator and legal proceedings |  | 10,414 |  |  | 8.4 |  |  | 1,105 |
Linden, NJ | Operating solvent recycling center |  | 7,678 |  |  | 6.2 |  |  | 825 |
Various(2) | All other incinerators, landfills, wastewater treatment facilities and service centers (78 facilities) |  | 57,056 |  |  | 45.7 |  |  | 13,894 |
Various(2) | Superfund sites (each representing less than 5% of total liabilities) owned by third parties (16 sites) |  | 7,569 |  |  | 6.1 |  |  | 757 |
Total |  |  | $ | 124,468 |  |  | 100.0 | % |  | $ | 23,053 |
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(1) | Amounts represent the high end of the range of management's best estimate of the reasonably possible additional liabilities.
(2) | $17.9 million of the $124.5 million remedial liabilities and $1.8 million of the $23.1 million reasonably possible additional liabilities include estimates of remediation liabilities related to the legal and administrative proceedings discussed in Note 17, "Commitments and Contingencies," as well as other such estimated remedial liabilities.

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