INVENTORIES AND SUPPLIES (Details) - USD ($) $ in Thousands	Jun. 30, 2021	Dec. 31, 2020
Inventory [Line Items]
Inventories and supplies	$ 215,725	$ 220,498
Oil and oil related products
Inventory [Line Items]
Inventories and supplies	75,162	76,209
Supplies
Inventory [Line Items]
Inventories and supplies	119,388	120,007
Solvent and solutions
Inventory [Line Items]
Inventories and supplies	8,976	8,812
Other
Inventory [Line Items]
Inventories and supplies	$ 12,199	$ 15,470

Amount after valuation and LIFO reserves of inventory expected to be sold, or consumed within one year or operating cycle, if longer.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
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Reference 2: http://www.xbrl.org/2003/role/exampleRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 852
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Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
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