Intangible Assets

3 Months Ended

Mar. 31, 2012

Intangible Assets [Abstract]

Intangible Assets

7. Intangible Assets

The following table reflects the components of intangible assets being amortized as of:

	March 31, 2012						December 31, 2011
	Gross Carrying Amount		Accumulated Amortization		Carrying Value		Gross Carrying Amount		Accumulated Amortization		Carrying Value
Refinery services customer relationships	$	94,654	$	63,875	$	30,779	$	94,654	$	62,111	$	32,543
Supply and logistics customer relationships		35,430		24,289		11,141		35,430		23,584		11,846
Refinery services supplier relationships		36,469		34,696		1,773		36,469		34,105		2,364
Refinery services licensing agreements		38,678		20,330		18,348		38,678		19,476		19,202
Supply and logistics trade names		18,888		18,053		835		18,888		17,048		1,840
Intangibles associated with supply and logistics lease		13,260		2,210		11,050		13,260		2,092		11,168
Other		17,895		3,377		14,518		17,292		2,899		14,393
Total	$	255,274	$	166,830	$	88,444	$	254,671	$	161,315	$	93,356

Amortization expense on intangible assets was $5.5 million and $7.2 million for the three months ended March 31, 2012 and 2011, respectively. Estimated amortization for each of the next five years is as follows: remainder of 2012 – $14.6 million; 2013 – $14.5 million; 2014 –$12.2 million; 2015 – $10.4 million; and 2016 – $8.9 million.