Intangible Assets, Goodwill And Other Assets (Schedule of Estimated Amortization Expense) (Details) $ in Thousands	Dec. 31, 2016 USD ($)
Finite-Lived Intangible Assets [Line Items]
2017	$ 23,632
2018	21,490
2019	17,155
2020	16,241
2021	10,611
Refinery Services Customer Relationships [Member]
Finite-Lived Intangible Assets [Line Items]
2017	2,737
2018	2,161
2019	0
2020	0
2021	0
Refinery Services Licensing Agreements [Member]
Finite-Lived Intangible Assets [Line Items]
2017	2,324
2018	2,150
2019	0
2020	0
2021	0
Supply And Logistics Customer Relationships [Member]
Finite-Lived Intangible Assets [Line Items]
2017	1,407
2018	41
2019	39
2020	38
2021	37
Supply And Logistics Intangibles associated with lease [Member]
Finite-Lived Intangible Assets [Line Items]
2017	474
2018	474
2019	474
2020	474
2021	474
Marine Transportation Contracts [Member]
Finite-Lived Intangible Assets [Line Items]
2017	5,400
2018	5,400
2019	5,400
2020	4,500
2021	0
Offshore Pipeline Contracts [Member]
Finite-Lived Intangible Assets [Line Items]
2017	8,321
2018	8,321
2019	8,321
2020	8,321
2021	8,321
Other [Member]
Finite-Lived Intangible Assets [Line Items]
2017	2,969
2018	2,943
2019	2,921
2020	2,908
2021	$ 1,779

Amount of amortization expense for assets, excluding financial assets and goodwill, lacking physical substance with a finite life expected to be recognized during the next fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 350
-SubTopic 30
-Section 50
-Paragraph 2
-Subparagraph (a)(3)
-URI http://asc.fasb.org/extlink&oid=66006027&loc=d3e16323-109275

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