Intangible Assets (Tables)

6 Months Ended

Jun. 30, 2015

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, 2015						December 31, 2014
	Gross Carrying Amount		Accumulated Amortization		Carrying Value		Gross Carrying Amount		Accumulated Amortization		Carrying Value
Refinery Services:
Customer relationships	$	94,654	$	84,083	$	10,571	$	94,654	$	81,880	$	12,774
Licensing agreements	38,678		30,339		8,339		38,678		28,983		9,695
Segment total	133,332		114,422		18,910		133,332		110,863		22,469
Supply & Logistics:
Customer relationships	35,430		31,082		4,348		35,430		30,228		5,202
Intangibles associated with lease	13,260		3,749		9,511		13,260		3,512		9,748
Segment total	48,690		34,831		13,859		48,690		33,740		14,950
Marine contract intangibles	32,000		3,333		28,667		32,000		833		31,167
Other	21,533		7,055		14,478		22,797		8,452		14,345
Total	$	235,555	$	159,641	$	75,914	$	236,819	$	153,888	$	82,931

Amortization Expense

Our amortization of intangible assets for the periods presented was as follows:

	Three Months Ended June 30,				Six Months Ended June 30,
	2015		2014		2015		2014
Amortization of intangible assets	$	4,154	$	3,147	$	8,191	$	6,292

Schedule of Expected Amortization Expense

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

Remainder of	2015	$	9,761
	2016	$	15,628
	2017	$	14,465
	2018	$	12,349
	2019	$	8,036