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INVENTORIES AND SUPPLIES
 6 Months Ended
Jun. 30, 2023
Inventory Disclosure [Abstract]  
INVENTORIES AND SUPPLIES INVENTORIES AND SUPPLIES
Inventories and supplies consisted of the following (in thousands):
June 30, 2023December 31, 2022
Oil and oil related products$129,575 $151,519 
Supplies162,788 143,743 
Solvent and solutions13,004 11,994 
Other20,515 17,738 
Total inventories and supplies$325,882 $324,994 
Supplies inventories consist primarily of critical spare parts to support the Company's incinerator and re-refinery operations
and other general supplies used in our normal day-to-day operations. Other inventories consist primarily of parts washer components, cleaning fluids, absorbents and automotive fluids, such as windshield washer fluid and antifreeze.