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CLOSURE AND POST-CLOSURE LIABILITIES | 6 Months Ended
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Jun. 30, 2019
Asset Retirement Obligation Disclosure [Abstract] |
CLOSURE AND POST-CLOSURE LIABILITIES | CLOSURE AND POST-CLOSURE LIABILITIES The changes to closure and post-closure liabilities (also referred to as “asset retirement obligations”) from January 1, 2019 through June 30, 2019 were as follows (in thousands):
| Landfill Retirement Liability |  | Non-Landfill Retirement Liability |  | Total
Balance at January 1, 2019 | $ | 37,809 |  |  | $ | 32,122 |  |  | $ | 69,931 |
Liabilities assumed in acquisitions | — |  |  | 220 |  |  | 220 |
New asset retirement obligations | 1,058 |  |  | — |  |  | 1,058 |
Accretion | 1,455 |  |  | 1,387 |  |  | 2,842 |
Changes in estimates recorded to statement of operations | — |  |  | 107 |  |  | 107 |
Changes in estimates recorded to balance sheet | 2,798 |  |  | — |  |  | 2,798 |
Expenditures | (319 | ) |  | (1,219 | ) |  | (1,538 | )
Currency translation and other | 222 |  |  | 190 |  |  | 412 |
Balance at June 30, 2019 | $ | 43,023 |  |  | $ | 32,807 |  |  | $ | 75,830 |
All the landfill facilities included in the above were active as of June 30, 2019. In the six months ended June 30, 2019, there were no significant charges (benefits) resulting from changes in estimates for closure and post-closure liabilities. New asset retirement obligations incurred during the first six months of 2019 were discounted at the credit-adjusted risk-free rate of 6.02%.

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- Definition The entire disclosure for an asset retirement obligation and the associated long-lived asset. An asset retirement obligation is a legal obligation associated with the disposal or retirement from service of a tangible long-lived asset that results from the acquisition, construction or development, or the normal operations of a long-lived asset, except for certain obligations of lessees. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 410 -SubTopic 20 -URI http://asc.fasb.org/subtopic&trid=2175671 + Details
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