Intangible Assets, Goodwill And Other Assets (Schedule Of Intangible Assets) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014
Finite-Lived Intangible Assets [Line Items]
Intangible assets, Gross Carrying Amount	$ 389,942	$ 236,819
Intangible assets, Accumulated Amortization	166,496	153,888
Intangible assets, Carrying Value	$ 223,446	82,931
Refinery Services Customer Relationships [Member]
Finite-Lived Intangible Assets [Line Items]
Intangible assets, Weighted Amortization Period in Years	5 years
Intangible assets, Gross Carrying Amount	$ 94,654	94,654
Intangible assets, Accumulated Amortization	86,285	81,880
Intangible assets, Carrying Value	$ 8,369	12,774
Refinery Services Licensing Agreements [Member]
Finite-Lived Intangible Assets [Line Items]
Intangible assets, Weighted Amortization Period in Years	6 years
Intangible assets, Gross Carrying Amount	$ 38,678	38,678
Intangible assets, Accumulated Amortization	31,694	28,983
Intangible assets, Carrying Value	6,984	9,695
Refinery Services [Member]
Finite-Lived Intangible Assets [Line Items]
Intangible assets, Gross Carrying Amount	133,332	133,332
Intangible assets, Accumulated Amortization	117,979	110,863
Intangible assets, Carrying Value	$ 15,353	22,469
Supply And Logistics Customer Relationships [Member]
Finite-Lived Intangible Assets [Line Items]
Intangible assets, Weighted Amortization Period in Years	5 years
Intangible assets, Gross Carrying Amount	$ 35,430	35,430
Intangible assets, Accumulated Amortization	32,044	30,228
Intangible assets, Carrying Value	$ 3,386	5,202
Supply And Logistics Intangibles associated with lease [Member]
Finite-Lived Intangible Assets [Line Items]
Intangible assets, Weighted Amortization Period in Years	15 years
Intangible assets, Gross Carrying Amount	$ 13,260	13,260
Intangible assets, Accumulated Amortization	3,986	3,512
Intangible assets, Carrying Value	9,274	9,748
Supply And Logistics [Member]
Finite-Lived Intangible Assets [Line Items]
Intangible assets, Gross Carrying Amount	48,690	48,690
Intangible assets, Accumulated Amortization	36,030	33,740
Intangible assets, Carrying Value	$ 12,660	14,950
Marine Transportation Contracts [Member]
Finite-Lived Intangible Assets [Line Items]
Intangible assets, Weighted Amortization Period in Years	5 years
Intangible assets, Gross Carrying Amount	$ 27,000	32,000
Intangible assets, Accumulated Amortization	900	833
Intangible assets, Carrying Value	$ 26,100	31,167
Offshore Pipeline Contracts [Member]
Finite-Lived Intangible Assets [Line Items]
Intangible assets, Weighted Amortization Period in Years	19 years
Intangible assets, Gross Carrying Amount	$ 158,101	0
Intangible assets, Accumulated Amortization	3,467	0
Intangible assets, Carrying Value	$ 154,634	0
Other [Member]
Finite-Lived Intangible Assets [Line Items]
Intangible assets, Weighted Amortization Period in Years	5 years
Intangible assets, Gross Carrying Amount	$ 22,819	22,797
Intangible assets, Accumulated Amortization	8,120	8,452
Intangible assets, Carrying Value	$ 14,699	$ 14,345