Intangible Assets, Goodwill And Other Assets (Schedule Of Intangible Assets) (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011
Finite-Lived Intangible Assets [Line Items]
Intangible assets, Gross Carrying Amount	$ 256,311	$ 254,671
Intangible assets, Accumulated Amortization	181,246	161,315
Intangible assets, Carrying Value	75,065	93,356
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	69,167	62,111
Intangible assets, Carrying Value	25,487	32,543
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	22,892	19,476
Intangible assets, Carrying Value	15,786	19,202
Refinery Services Supplier Relationships [Member]
Finite-Lived Intangible Assets [Line Items]
Intangible assets, Weighted Amortization Period in Years	2 years
Intangible assets, Gross Carrying Amount	36,469	36,469
Intangible assets, Accumulated Amortization	36,469	34,105
Intangible assets, Carrying Value	0	2,364
Refinery Services [Member]
Finite-Lived Intangible Assets [Line Items]
Intangible assets, Gross Carrying Amount	169,801	169,801
Intangible assets, Accumulated Amortization	128,528	115,692
Intangible assets, Carrying Value	41,273	54,109
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	26,403	23,584
Intangible assets, Carrying Value	9,027	11,846
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	2,565	2,092
Intangible assets, Carrying Value	10,695	11,168
Supply And Logistics Trade Names [Member]
Finite-Lived Intangible Assets [Line Items]
Intangible assets, Weighted Amortization Period in Years	4 years
Intangible assets, Gross Carrying Amount	18,888	18,888
Intangible assets, Accumulated Amortization	18,888	17,048
Intangible assets, Carrying Value	0	1,840
Supply And Logistics [Member]
Finite-Lived Intangible Assets [Line Items]
Intangible assets, Gross Carrying Amount	67,578	67,578
Intangible assets, Accumulated Amortization	47,856	42,724
Intangible assets, Carrying Value	19,722	24,854
Other [Member]
Finite-Lived Intangible Assets [Line Items]
Intangible assets, Weighted Amortization Period in Years	5 years
Intangible assets, Gross Carrying Amount	18,932	17,292
Intangible assets, Accumulated Amortization	4,862	2,899
Intangible assets, Carrying Value	$ 14,070	$ 14,393