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Inventories (Tables)
9 Months Ended
Sep. 30, 2020
Inventory Disclosure [Abstract]  
Components of Inventory
Components of inventories at September 30, 2020 and December 31, 2019 were as follows: 
 September 30,
2020
December 31,
2019
Natural gas liquids$45,261 $19,097 
Sulfur2,835 4,586 
Fertilizer8,894 15,852 
Lubricants16,544 18,925 
Other4,190 4,080 
 $77,724 $62,540