v3.20.4
INVENTORIES (Tables)
12 Months Ended
Dec. 31, 2020
Inventory Disclosure [Abstract]  
Schedule of Inventory Table [Text Block]
Inventories consisted of the following:
 December 31,
 20202019
 (Thousands of Dollars)
Petroleum products$7,394 $8,646 
Materials and supplies3,665 3,747 
Total$11,059 $12,393