Intangible Assets (Tables)

9 Months Ended

Sep. 30, 2013

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:

	September 30, 2013						December 31, 2012
	Gross Carrying Amount		Accumulated Amortization		Carrying Value		Gross Carrying Amount		Accumulated Amortization		Carrying Value
Refinery Services:
Customer relationships	$	94,654	$	74,504	$	20,150	$	94,654	$	69,167	$	25,487
Licensing agreements	38,678		25,264		13,414		38,678		22,892		15,786
Supplier relationships	—		—		—		36,469		36,469		—
Segment total	133,332		99,768		33,564		169,801		128,528		41,273
Supply & Logistics:
Customer relationships	35,430		28,027		7,403		35,430		26,403		9,027
Intangibles associated with lease	13,260		2,920		10,340		13,260		2,565		10,695
Trade names	—		—		—		18,888		18,888		—
Segment total	48,690		30,947		17,743		67,578		47,856		19,722
Other	20,512		6,066		14,446		18,932		4,862		14,070
Total	$	202,534	$	136,781	$	65,753	$	256,311	$	181,246	$	75,065

Amortization Expense

Our amortization expense for the periods presented was as follows:

	Three Months Ended September 30,				Nine Months Ended September 30,
	2013		2012		2013		2012
Amortization expense	$	3,656	$	4,520	$	10,892	$	15,390

Schedule of Expected Amortization Expense

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

Remainder of	2013	$	3,655
	2014	$	12,500
	2015	$	10,692
	2016	$	9,230
	2017	$	8,067