Acquisitions (Assets Acquired And Liabilities Assumed) (Details) (USD $) In Thousands, unless otherwise specified	1 Months Ended		0 Months Ended
	Nov. 30, 2012		Aug. 06, 2012		Dec. 31, 2014	Dec. 31, 2013
Business Acquisition [Line Items]
Goodwill					$ 2,735	$ 2,735
United Ocean Services, LLC [Member]
Business Acquisition [Line Items]
Working Capital including Cash Acquired	8,511
Inventory	6,510
Property, Plant, and Equipment	60,037
Identifiable Intangible Assets	45,131
Total Assets Acquired	120,189
Misc. Payables and Accrued Expenses	(5,434)
Other Long-Term Liability	(1,945)
Total Liabilities Assumed	(7,379)
Net Assets Acquired and Liabilities Assumed	112,810
Total Consideration Transferred	(114,717)
Goodwill	1,907	[1]
Frascati Shops, Inc. And Tower, LLC [Member]
Business Acquisition [Line Items]
Working Capital including Cash Acquired			18
Inventory			231
Property, Plant, and Equipment			3,411
Identifiable Intangible Assets			490
Total Assets Acquired			4,150
Misc. Payables and Accrued Expenses			(412)
Other Long-Term Liability			(3,490)
Deferred Tax Liability			(453)
Total Liabilities Assumed			(4,355)
Net Assets Acquired and Liabilities Assumed			(205)
Total Consideration Transferred			(623)
Goodwill			$ 828	[2]

[1] Goodwill represents the fair value of the consideration transferred over the net assets acquired and represents the future economic benefits arising from other assets acquired that could not be individually identified and separately recognized.  Our above-described goodwill is not amortized nor do we expect it to be deductible for tax purposes.  Specifically, the goodwill recorded as part of the acquisition of UOS includes the following:the expected synergies and other benefits that we believe will result from combining the operations of UOS with our existing Jones Act operations,any intangible assets that do not qualify for separate recognition, including an assembled workforce of the acquired companies, andthe anticipated higher rate of return of UOS’s existing businesses as going concerns compared to the anticipated rate of return if we had acquired all of the net assets separately.

[2] Goodwill represents the sum of the consideration transferred and the net liabilities assumed and represents the future economic benefits arising from other assets acquired that could not be individually identified and separately recognized. Our above-described goodwill is not amortized nor do we expect it to be deductible for tax purposes. Specifically, the goodwill recorded as part of the acquisition of the Acquired Companies includes the following: the expected synergies and other benefits that we believe will result from combining the operations of the Acquired Companies with our existing Rail-Ferry operations,any intangible assets that do not qualify for separate recognition, including an assembled workforce of the acquired companies, andthe anticipated higher rate of return of the Acquired Companies existing businesses as going concerns compared to the anticipated rate of return if we had acquired all of the net assets separately.