Intangible Assets, Goodwill And Other Assets (Schedule Of Intangible Assets) (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2011 years	Dec. 31, 2010
Finite-Lived Intangible Assets [Line Items]
Intangible assets, Gross Carrying Amount	$ 254,671	$ 251,155
Intangible assets, Accumulated Amortization	161,315	130,980
Intangible assets, Carrying Value	93,356	120,175
Refinery Services Customer Relationships [Member]
Finite-Lived Intangible Assets [Line Items]
Intangible assets, Weighted Amortization Period in Years	5
Intangible assets, Gross Carrying Amount	94,654	94,654
Intangible assets, Accumulated Amortization	62,111	53,139
Intangible assets, Carrying Value	32,543	41,515
Supply And Logistics Customer Relationships [Member]
Finite-Lived Intangible Assets [Line Items]
Intangible assets, Weighted Amortization Period in Years	5
Intangible assets, Gross Carrying Amount	35,430	35,430
Intangible assets, Accumulated Amortization	23,584	19,981
Intangible assets, Carrying Value	11,846	15,449
Refinery Services Supplier Relationships [Member]
Finite-Lived Intangible Assets [Line Items]
Intangible assets, Weighted Amortization Period in Years	2
Intangible assets, Gross Carrying Amount	36,469	36,469
Intangible assets, Accumulated Amortization	34,105	31,476
Intangible assets, Carrying Value	2,364	4,993
Refinery Services Licensing Agreements [Member]
Finite-Lived Intangible Assets [Line Items]
Intangible assets, Weighted Amortization Period in Years	6
Intangible assets, Gross Carrying Amount	38,678	38,678
Intangible assets, Accumulated Amortization	19,476	15,786
Intangible assets, Carrying Value	19,202	22,892
Supply And Logistics Trade Names [Member]
Finite-Lived Intangible Assets [Line Items]
Intangible assets, Weighted Amortization Period in Years	4
Intangible assets, Gross Carrying Amount	18,888	18,888
Intangible assets, Accumulated Amortization	17,048	7,530
Intangible assets, Carrying Value	1,840	11,358
Supply And Logistics Lease [Member]
Finite-Lived Intangible Assets [Line Items]
Intangible assets, Weighted Amortization Period in Years	15
Intangible assets, Gross Carrying Amount	13,260	13,260
Intangible assets, Accumulated Amortization	2,092	1,618
Intangible assets, Carrying Value	11,168	11,642
Other [Member]
Finite-Lived Intangible Assets [Line Items]
Intangible assets, Weighted Amortization Period in Years	5
Intangible assets, Gross Carrying Amount	17,292	13,776
Intangible assets, Accumulated Amortization	2,899	1,450
Intangible assets, Carrying Value	$ 14,393	$ 12,326