Inventories (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016	Dec. 31, 2016
Inventories
Crude Oil	$ 544,837		$ 544,837		$ 549,886
Other raw materials and unfinished products	363,483		363,483		287,561
Finished products	670,120		670,120		465,432
Lower of cost or market reserve	(317,195)		(317,195)		(332,518)
Process chemicals	26,173		26,173		2,767
Repair and maintenance supplies and other	132,424		132,424		162,548
Inventories, total	1,419,842		1,419,842		$ 1,135,676
Lower of cost or market inventory valuation adjustment	$ (111,128)	$ 312	$ (15,323)	$ (194,282)