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INVENTORIES AND SUPPLIES | 12 Months Ended
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Dec. 31, 2017
Inventory Disclosure [Abstract] |
INVENTORIES AND SUPPLIES | INVENTORIES AND SUPPLIES Inventories and supplies consisted of the following (in thousands):
| December 31, 2017 |  | December 31, 2016
Oil and oil related products | $ | 58,142 |  |  | $ | 52,158 |
Supplies and drums | 94,242 |  |  | 90,610 |
Solvent and solutions | 9,167 |  |  | 8,566 |
Modular camp accommodations | 1,826 |  |  | 15,255 |
Other | 12,635 |  |  | 11,839 |
Total inventories and supplies | $ | 176,012 |  |  | $ | 178,428 |
As of December 31, 2017 and 2016, other inventories consisted primarily of cleaning fluids, such as absorbents and wipers, and automotive fluids, such as windshield washer fluid and antifreeze. Supplies and drums consist primarily of drums and containers as well as critical spare parts to support the Company's incinerator and re-refinery operations. During the second quarter of 2017, $12.6 million of modular camp accommodations inventory was transferred to and included as camp equipment within the Company's property, plant and equipment amount as such assets will be utilized in the Company's ongoing camp and lodging operations.

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- Definition The entire disclosure for inventory. Includes, but is not limited to, the basis of stating inventory, the method of determining inventory cost, the classes of inventory, and the nature of the cost elements included in inventory. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 330 -URI http://asc.fasb.org/topic&trid=2126998 + Details
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