Intangible Assets (Tables)

9 Months Ended

Sep. 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:

	September 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	$	85,184	$	9,470	$	94,654	$	81,880	$	12,774
Licensing agreements	38,678		31,016		7,662		38,678		28,983		9,695
Segment total	133,332		116,200		17,132		133,332		110,863		22,469
Supply & Logistics:
Customer relationships	35,430		31,563		3,867		35,430		30,228		5,202
Intangibles associated with lease	13,260		3,868		9,392		13,260		3,512		9,748
Segment total	48,690		35,431		13,259		48,690		33,740		14,950
Marine contract intangibles	32,000		4,583		27,417		32,000		833		31,167
Offshore pipeline contract intangibles	158,831		1,393		157,438		—		—		—
Other	21,798		7,587		14,211		22,797		8,452		14,345
Total	$	394,651	$	165,194	$	229,457	$	236,819	$	153,888	$	82,931

Amortization Expense

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

	Three Months Ended September 30,				Nine Months Ended September 30,
	2015		2014		2015		2014
Amortization of intangible assets	$	5,554	$	3,148	$	13,745	$	9,440

Schedule of Expected Amortization Expense

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

Remainder of	2015	$	6,785
	2016	$	24,014
	2017	$	22,850
	2018	$	20,735
	2019	$	16,422