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Other Assets
 9 Months Ended
Sep. 30, 2021
Deferred Costs, Capitalized, Prepaid, and Other Assets Disclosure [Abstract]  
Other Assets OTHER ASSETS
Prepaid expense and other assets consist of the following:
   September 30, 2021December 31, 2020
Commodity derivatives and related collateral, net$5,033 $5,433 
Prepaid expenses25,072 23,295 
Deposits1,915 2,047 
RIN inventory8,341 869 
Taxes receivable37,529 29,621 
Other11,161 6,392 
Total$89,051 $67,657 
RIN inventory is valued at the lower of cost or net realizable value. There were no lower of cost or market adjustments made to the inventory values reported as of September 30, 2021 and December 31, 2020.
Other noncurrent assets consist of the following:
September 30, 2021December 31, 2020
Investments$14,520 $13,005 
Spare parts inventory2,567 2,610 
Catalysts14,985 7,408 
Deposits357 451 
Other11,583 9,246 
Total$44,012 $32,720