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RELATED PARTY TRANSACTIONS (Detail) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2017 USD ($) | Dec. 31, 2016 USD ($) | Dec. 31, 2015 USD ($) | Apr. 30, 1994 Lease
Related Party Transaction [Line Items] |  |  |  |
Total services purchased | $ 3,377 | $ 4,024 | $ 1,341 |
Outstanding accounts payable | 30 | 18 |  |
Number of leases | Lease |  |  |  | 2
Total expense charged to operations under lease agreement | 360 | 371 | 384 |
Accrued costs associated with post-closure obligations | 62,290 | 44,207 | 41,041 |
Restricted assets - landfill closure |  |  |  |
Related Party Transaction [Line Items] |  |  |  |
Landfill post-closure cost | 27 | 10 | 9 |
Accrued costs associated with post-closure obligations | $ 60 | 70 |  |
Capital Lease Obligations |  |  |  |
Related Party Transaction [Line Items] |  |  |  |
Lease extended period | 5 years |  |  |
CCI |  |  |  |
Related Party Transaction [Line Items] |  |  |  |
Revenue from related party | $ 237 | $ 307 | $ 415 |
Related Party |  |  |  |
Related Party Transaction [Line Items] |  |  |  |
Leases monthly payments | $ 28 |  |  |

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