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RESTRICTED ASSETS (Tables) | 12 Months Ended
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Dec. 31, 2018
Receivables [Abstract] |
Summary of Restricted Assets | A summary of restricted assets is as follows:
| December 31,
Non Current: | 2018 |  | 2017
Restricted investment securities - landfill closure | $ | 1,248 |  |  | $ | 1,220 |

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