Goodwill, Other Intangible Assets, And Deferred Charges (Narrative) (Details) - USD ($) $ in Thousands	1 Months Ended	3 Months Ended	12 Months Ended
	Sep. 30, 2015	Dec. 31, 2015	Dec. 31, 2015		Dec. 31, 2014
Goodwill And Other Intangible Assets [Line Items]
Deferred debt issuance costs reclassified from deferred charges, net		$ 3,037	$ 3,037		$ 2,870
Amortization of Intangible Assets			2,502		3,714
Amortization expense for deferred charges			14,200		18,500
Gross deferred charges		48,500	48,500		55,600
Accumulated amortization of deferred charges		25,500	25,500		29,800
Goodwill impairment loss		800	(2,735)
Impairment charges of assets held for sale			(154,463)		(38,213)
Reclassified Deferred Charges [Member]
Goodwill And Other Intangible Assets [Line Items]
Amortization expense for deferred charges			2,200		$ 600
United Ocean Services, LLC [Member]
Goodwill And Other Intangible Assets [Line Items]
Goodwill impairment loss			1,900
Frascati Shops, Inc. and Tower, LLC [Member]
Goodwill And Other Intangible Assets [Line Items]
Goodwill impairment loss		$ 800	828	[1]
Impairment charges of assets held for sale			94,300
Jones Act [Member] | United Ocean Services, LLC [Member]
Goodwill And Other Intangible Assets [Line Items]
Goodwill impairment loss	$ 1,900		1,907	[2]
Rail-Ferry Service [Member] | Frascati Shops, Inc. and Tower, LLC [Member]
Goodwill And Other Intangible Assets [Line Items]
Goodwill impairment loss			800
Tradenames And Customer Relationships [Member] | Rail-Ferry Service [Member] | Frascati Shops, Inc. and Tower, LLC [Member]
Goodwill And Other Intangible Assets [Line Items]
Impairment charges of assets held for sale			400
Customer Relationships [Member] | United Ocean Services, LLC [Member]
Goodwill And Other Intangible Assets [Line Items]
Amortization of Intangible Assets			2,345
Customer Relationships [Member] | Frascati Shops, Inc. and Tower, LLC [Member]
Goodwill And Other Intangible Assets [Line Items]
Amortization of Intangible Assets			17
Impairment charges of assets held for sale			400
Trade Names [Member] | United Ocean Services, LLC [Member]
Goodwill And Other Intangible Assets [Line Items]
Amortization of Intangible Assets			136
Trade Names [Member] | Frascati Shops, Inc. and Tower, LLC [Member]
Goodwill And Other Intangible Assets [Line Items]
Amortization of Intangible Assets			4
Impairment charges of assets held for sale			400
Various Other Assets Drydocking Costs [Member]
Goodwill And Other Intangible Assets [Line Items]
Impairment charges of assets held for sale			$ 2,400

[1] Refers to the goodwill associated with our FSI acquisition, which is held for sale.

[2] Refers to the goodwill associated with our UOS acquisition included in the Jones Act segment.