Intangible Assets, Goodwill And Other Assets (Schedule Of Intangible Assets) (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
Dec. 31, 2014	Dec. 31, 2013
Finite-Lived Intangible Assets [Line Items]
Intangible assets, Gross Carrying Amount	$ 236,819	$ 203,378
Intangible assets, Accumulated Amortization	153,888	140,450
Intangible assets, Carrying Value	82,931us-gaap_FiniteLivedIntangibleAssetsNet	62,928us-gaap_FiniteLivedIntangibleAssetsNet
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	81,880	76,283
Intangible assets, Carrying Value	12,774	18,371
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	28,983	26,055
Intangible assets, Carrying Value	9,695	12,623
Refinery Services [Member]
Finite-Lived Intangible Assets [Line Items]
Intangible assets, Gross Carrying Amount	133,332	133,332
Intangible assets, Accumulated Amortization	110,863	102,338
Intangible assets, Carrying Value	22,469	30,994
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	30,228	28,568
Intangible assets, Carrying Value	5,202	6,862
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	3,512	3,039
Intangible assets, Carrying Value	9,748	10,221
Supply And Logistics [Member]
Finite-Lived Intangible Assets [Line Items]
Intangible assets, Gross Carrying Amount	48,690	48,690
Intangible assets, Accumulated Amortization	33,740	31,607
Intangible assets, Carrying Value	14,950	17,083
Marine Transportation Contracts [Member]
Finite-Lived Intangible Assets [Line Items]
Intangible assets, Weighted Amortization Period in Years	5 years
Intangible assets, Gross Carrying Amount	32,000	0
Intangible assets, Accumulated Amortization	833	0
Intangible assets, Carrying Value	31,167	0
Other [Member]
Finite-Lived Intangible Assets [Line Items]
Intangible assets, Weighted Amortization Period in Years	5 years
Intangible assets, Gross Carrying Amount	22,797	21,356
Intangible assets, Accumulated Amortization	8,452	6,505
Intangible assets, Carrying Value	$ 14,345	$ 14,851

Accumulated amount of amortization of assets, excluding financial assets and goodwill, lacking physical substance with a finite life.

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 350

-SubTopic 30

-Section 50

-Paragraph 2

-Subparagraph (a)(1)

-URI http://asc.fasb.org/extlink&oid=26713463&loc=d3e16323-109275

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