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INVENTORIES AND SUPPLIES
 12 Months Ended
Dec. 31, 2022
Inventory Disclosure [Abstract]  
INVENTORIES AND SUPPLIES INVENTORIES AND SUPPLIES
Inventories and supplies consisted of the following (in thousands):
December 31, 2022December 31, 2021
Oil and oil related products$151,519 $101,965 
Supplies143,743 126,602 
Solvent and solutions11,994 8,099 
Other17,738 14,026 
Total inventories and supplies$324,994 $250,692 
The balance of oil and oil related products has increased due to higher volumes of base oil on hand at December 31, 2022 when compared with December 31, 2021 and overall price increases for the oil inventory and additives. Supplies inventories consist primarily of critical spare parts to support the Company's incinerator and re-refinery operations and other general supplies used in 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.