Summary Of Significant Accounting Policies (Narrative) (Details) (USD $)	12 Months Ended													0 Months Ended		1 Months Ended
	Dec. 31, 2013 item	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2013 Deferred Drydocking Cost [Member] Maximum [Member]	Dec. 31, 2013 Deferred Drydocking Cost [Member] Minimum [Member]	Dec. 31, 2013 Molten Sulphur Carrier Vessel [Member] item	Dec. 31, 2013 Multi-Purpose Vessels [Member] item	Dec. 31, 2013 Container Vessels [Member] item	Dec. 31, 2013 Tanker [Member] item	Dec. 31, 2013 PCTC [Member] item	Dec. 31, 2013 Bulk Carriers [Member] item	Dec. 31, 2013 Mini-Bulkers [Member] item	Dec. 31, 2013 Multi-Purpose Heavy Lift Vessel [Member] item	Aug. 06, 2012 Frascati Shops, Inc. And Tower, LLC [Member]		Nov. 30, 2012 United Ocean Services, LLC [Member]
Summary Of Significant Accounting Policies [Line Items]
Number of vessels	50					1	2	5	1	3	1	15	1
Minimum percentage of ownership considered for consolidation (in hundredths)	50.00%
Minimum percentage of ownership considered for equity method of accounting for investments (in hundredths)	20.00%
Maximum percentage of ownership considered for equity method of accounting for investments (in hundredths)	50.00%
Number of vehicle/ships owned							1	2		5
Annual payments for each vessel	$ 2,800,000	$ 3,100,000	$ 2,950,000
Inventory	11,286,000	11,847,000
Capitalized interest	52,000	120,045	339,000
Amortized period				5 years	2 years
Goodwill acquired														828,000		1,900,000
Goodwill	2,735,000	2,700,000												828,000	[1]	1,907,000	[2]
Gain on foreign currency transaction	412,000	10,000	460,000
Gain (loss) on Foreign Currency Exchange	5,914,000	5,506,000	(3,051,000)
Currency exchange rate, percentage	102.53
Change in liability from effect of the adjustment to the pension funded status	(9,400,000)	2,600,000
Change in OCI from effect of the adjustment to the pension funded status	(7,100,000)	2,200,000
Change in funding status of benefit plans, deferred taxes	2,300,000	452,000
Pension plan, overfunded amount	$ 1,500,000
Pension plan, underfunded percent	104.60%

[1] 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.

[2] 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.