Intangible Assets (Tables)

3 Months Ended

Mar. 31, 2014

Intangible Assets, Net (Excluding Goodwill) [Abstract]

Schedule Of Components Of Intangible Assets

The following table summarizes the components of our intangible assets at the dates indicated:

	March 31, 2014						December 31, 2013
	Gross Carrying Amount		Accumulated Amortization		Carrying Value		Gross Carrying Amount		Accumulated Amortization		Carrying Value
Refinery Services:
Customer relationships	$	94,654	$	77,682	$	16,972	$	94,654	$	76,283	$	18,371
Licensing agreements	38,678		26,787		11,891		38,678		26,055		12,623
Segment total	133,332		104,469		28,863		133,332		102,338		30,994
Supply & Logistics:
Customer relationships	35,430		28,983		6,447		35,430		28,568		6,862
Intangibles associated with lease	13,260		3,157		10,103		13,260		3,039		10,221
Segment total	48,690		32,140		16,550		48,690		31,607		17,083
Other	21,488		6,987		14,501		21,356		6,505		14,851
Total	$	203,510	$	143,596	$	59,914	$	203,378	$	140,450	$	62,928

Amortization Expense

Our amortization expense for the periods presented was as follows:

	Three Months Ended March 31,
	2014		2013
Amortization expense	$	3,145	$	3,627

Schedule of Expected Amortization Expense

We estimate that our amortization expense for the next five years will be as follows:

Remainder of	2014	$	9,459
	2015	$	10,791
	2016	$	9,330
	2017	$	8,166
	2018	$	7,245