Other Assets (Details) - USD ($) $ in Thousands	Jun. 30, 2016	Dec. 31, 2015
Summary of prepaid expense and other assets
Commodity derivatives and related collateral, net	$ 17,273	$ 10,097
Prepaid expenses	13,323	8,504
Deposits	2,921	3,824
RIN inventory	34,323	5,656
Taxes receivable	2,338	1,814
Other	2,891	1,987
Total	$ 73,069	$ 31,882