Inventories (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016	Dec. 31, 2016
Inventories
Crude Oil	$ 543,139		$ 543,139		$ 549,886
Other raw materials and unfinished products	342,991		342,991		287,561
Finished products	606,371		606,371		465,432
Lower of cost or market reserve	(428,323)		(428,323)		(332,518)
Process chemicals	21,704		21,704		2,767
Repair and maintenance supplies and other	106,091		106,091		162,548
Inventories, total	1,191,973		1,191,973		$ 1,135,676
Lower of cost or market inventory valuation adjustment	$ 83,982	$ (138,473)	$ 95,805	$ (194,594)