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PROPERTY, PLANT AND EQUIPMENT (Tables) | 12 Months Ended
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Dec. 31, 2017
Property, Plant and Equipment [Abstract] |
Components of Property, Plant and Equipment | We provide for depreciation and amortization using the straight-line method by charges to operations in amounts that allocate the cost of the assets over their estimated useful lives as follows:
Asset Classification |  | Estimated Useful Life
Buildings and improvements |  | 10-30 years
Machinery and equipment |  | 5-10 years
Rolling stock |  | 5-10 years
Containers |  | 5-12 years
Furniture and Fixtures |  | 3-8 years
A summary of property, plant and equipment is as follows:
| December 31,
| 2017 |  | 2016
Land | $ | 24,224 |  |  | $ | 24,517 |
Landfills | 513,548 |  |  | 570,464 |
Landfill operating lease contracts | 114,462 |  |  | 133,239 |
Buildings and improvements | 140,155 |  |  | 143,036 |
Machinery and equipment | 139,029 |  |  | 132,748 |
Rolling stock | 138,102 |  |  | 133,840 |
Containers | 103,501 |  |  | 97,744 |
| 1,173,021 |  |  | 1,235,588 |
Less: accumulated depreciation and amortization | (811,474 | ) |  | (837,122 | )
| $ | 361,547 |  |  | $ | 398,466 |

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- Definition Tabular disclosure of physical assets used in the normal conduct of business and not intended for resale. Includes, but is not limited to, balances by class of assets, depreciation and depletion expense and method used, including composite depreciation, and accumulated deprecation. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 360 -SubTopic 10 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6391035&loc=d3e2868-110229 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(13)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
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