Intangible Assets, Goodwill And Other Assets (Schedule of Intangible Assets) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015
Finite-Lived Intangible Assets [Line Items]
Intangible assets, Gross Carrying Amount	$ 395,692	$ 389,942
Intangible assets, Accumulated Amortization	190,805	166,496
Intangible assets, Carrying Value	$ 204,887	223,446
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	89,756	86,285
Intangible assets, Carrying Value	$ 4,898	8,369
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	34,204	31,694
Intangible assets, Carrying Value	4,474	6,984
Refinery Services [Member]
Finite-Lived Intangible Assets [Line Items]
Intangible assets, Gross Carrying Amount	133,332	133,332
Intangible assets, Accumulated Amortization	123,960	117,979
Intangible assets, Carrying Value	$ 9,372	15,353
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	33,676	32,044
Intangible assets, Carrying Value	$ 1,754	3,386
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	4,459	3,986
Intangible assets, Carrying Value	8,801	9,274
Supply And Logistics [Member]
Finite-Lived Intangible Assets [Line Items]
Intangible assets, Gross Carrying Amount	48,690	48,690
Intangible assets, Accumulated Amortization	38,135	36,030
Intangible assets, Carrying Value	$ 10,555	12,660
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	27,000
Intangible assets, Accumulated Amortization	6,300	900
Intangible assets, Carrying Value	$ 20,700	26,100
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	158,101
Intangible assets, Accumulated Amortization	11,788	3,467
Intangible assets, Carrying Value	$ 146,313	154,634
Other [Member]
Finite-Lived Intangible Assets [Line Items]
Intangible assets, Weighted Amortization Period in Years	5 years
Intangible assets, Gross Carrying Amount	$ 28,569	22,819
Intangible assets, Accumulated Amortization	10,622	8,120
Intangible assets, Carrying Value	$ 17,947	$ 14,699