Intangible Assets (Tables)

6 Months Ended

Jun. 30, 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:

	June 30, 2014						December 31, 2013
	Gross Carrying Amount		Accumulated Amortization		Carrying Value		Gross Carrying Amount		Accumulated Amortization		Carrying Value
Refinery Services:
Customer relationships	$	94,654	$	79,082	$	15,572	$	94,654	$	76,283	$	18,371
Licensing agreements	38,678		27,519		11,159		38,678		26,055		12,623
Segment total	133,332		106,601		26,731		133,332		102,338		30,994
Supply & Logistics:
Customer relationships	35,430		29,398		6,032		35,430		28,568		6,862
Intangibles associated with lease	13,260		3,275		9,985		13,260		3,039		10,221
Segment total	48,690		32,673		16,017		48,690		31,607		17,083
Other	21,714		7,469		14,245		21,356		6,505		14,851
Total	$	203,736	$	146,743	$	56,993	$	203,378	$	140,450	$	62,928

Amortization Expense

Our amortization expense for the periods presented was as follows:

	Three Months Ended June 30,				Six Months Ended June 30,
	2014		2013		2014		2013
Amortization expense	$	3,147	$	3,609	$	6,292	$	7,236

Schedule of Expected Amortization Expense

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

Remainder of	2014	$	6,317
	2015	$	10,814
	2016	$	9,352
	2017	$	8,189
	2018	$	7,268