Other Assets (Details) - USD ($) $ in Thousands	Sep. 30, 2019	Dec. 31, 2018
Summary of prepaid expense and other assets
Commodity derivatives and related collateral, net	$ 5,346	$ 13,799
Prepaid expenses	19,943	19,328
Deposits	3,463	2,123
RIN inventory	6,095	2,000
Taxes receivable	2,659	2,991
Other	3,125	928
Total	$ 40,631	$ 41,169

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