Intangible Assets, Goodwill And Other Assets (Narrative) (Details) - USD ($)	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Intangible Assets, Goodwill And Other Assets [Line Items]
Amortization of expense of intangible assets	$ 24,300,000	$ 20,000,000	$ 13,400,000
Goodwill	325,046,000	325,046,000
Impairment of goodwill	0	0	0
Amortization of CO2 assets	3,900,000	5,900,000	4,200,000
Refinery Services [Member]
Intangible Assets, Goodwill And Other Assets [Line Items]
Goodwill	301,900,000
Impairment of goodwill	0	0	0
Supply And Logistics [Member]
Intangible Assets, Goodwill And Other Assets [Line Items]
Goodwill	23,100,000
Impairment of goodwill	$ 0	$ 0	$ 0