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Inventories (Tables)
6 Months Ended
Jun. 30, 2020
Inventory Disclosure [Abstract]  
Components of Inventory
Components of inventories at June 30, 2020 and December 31, 2019 were as follows: 
 June 30,
2020
December 31,
2019
Natural gas liquids$26,783  $19,097  
Sulfur5,257  4,586  
Fertilizer11,478  15,852  
Lubricants18,209  18,925  
Other3,941  4,080  
 $65,668  $62,540