Intangible Assets (Schedule Of Components Of Intangible Assets) (Details) (USD $) In Thousands, unless otherwise specified	Mar. 31, 2013	Dec. 31, 2012
Finite-Lived Intangible Assets [Line Items]
Intangible assets, Gross Carrying Amount	$ 201,738	$ 256,311
Intangible assets, Accumulated Amortization	129,516	181,246
Intangible assets, Carrying Value	72,222	75,065
Refinery Services Customer Relationships [Member]
Finite-Lived Intangible Assets [Line Items]
Intangible assets, Gross Carrying Amount	94,654	94,654
Intangible assets, Accumulated Amortization	70,946	69,167
Intangible assets, Carrying Value	23,708	25,487
Refinery Services Licensing Agreements [Member]
Finite-Lived Intangible Assets [Line Items]
Intangible assets, Gross Carrying Amount	38,678	38,678
Intangible assets, Accumulated Amortization	23,683	22,892
Intangible assets, Carrying Value	14,995	15,786
Refinery Services Supplier Relationships [Member]
Finite-Lived Intangible Assets [Line Items]
Intangible assets, Gross Carrying Amount	0	36,469
Intangible assets, Accumulated Amortization	0	36,469
Intangible assets, Carrying Value	0	0
Refinery Services Segment Total [Member]
Finite-Lived Intangible Assets [Line Items]
Intangible assets, Gross Carrying Amount	133,332	169,801
Intangible assets, Accumulated Amortization	94,629	128,528
Intangible assets, Carrying Value	38,703	41,273
Supply And Logistics Customer Relationships [Member]
Finite-Lived Intangible Assets [Line Items]
Intangible assets, Gross Carrying Amount	35,430	35,430
Intangible assets, Accumulated Amortization	26,944	26,403
Intangible assets, Carrying Value	8,486	9,027
Supply And Logistics Intangibles Associated With Lease [Member]
Finite-Lived Intangible Assets [Line Items]
Intangible assets, Gross Carrying Amount	13,260	13,260
Intangible assets, Accumulated Amortization	2,683	2,565
Intangible assets, Carrying Value	10,577	10,695
Supply And Logistics Trade Names [Member]
Finite-Lived Intangible Assets [Line Items]
Intangible assets, Gross Carrying Amount	0	18,888
Intangible assets, Accumulated Amortization	0	18,888
Intangible assets, Carrying Value	0	0
Supply And Logistics Segment Total [Member]
Finite-Lived Intangible Assets [Line Items]
Intangible assets, Gross Carrying Amount	48,690	67,578
Intangible assets, Accumulated Amortization	29,627	47,856
Intangible assets, Carrying Value	19,063	19,722
Other [Member]
Finite-Lived Intangible Assets [Line Items]
Intangible assets, Gross Carrying Amount	19,716	18,932
Intangible assets, Accumulated Amortization	5,260	4,862
Intangible assets, Carrying Value	$ 14,456	$ 14,070