Condensed Consolidated Statements Of Income (Loss) (USD $) In Thousands, except Share data, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
Condensed Consolidated Statements Of Income (Loss) [Abstract]
Revenues	$ 74,410	$ 77,938	$ 223,856	$ 233,959
Operating Expenses:
Voyage Expenses	60,600	63,311	184,499	191,262
Intangible Amortization	1,029	1,521	3,087	4,669
Vessel Depreciation	6,290	6,130	19,528	17,705
Other Depreciation	18	17	54	51
Administrative and General Expenses	5,398	4,994	16,209	16,597
Loss on Sale of Other Assets	1	6	1	6
Total Operating Expenses	73,336	75,979	223,378	230,290
Operating Income	1,074	1,959	478	3,669
Interest and Other:
Interest Expense	3,115	3,109	7,301	7,387
Derivative (Gain) Loss	(89)	768	(57)	486
Other Income from Vessel Financing	(456)	(522)	(1,417)	(1,616)
Investment Income	(278)	(9)	(302)	(91)
Foreign Exchange Loss (Gain)	30	457	123	(4,560)
Total Interest and Other Income	2,322	3,803	5,648	1,606
(Loss) Income Before Benefit for Income Taxes and Equity in Net Income of Unconsolidated Entities	(1,248)	(1,844)	(5,170)	2,063
Provision for Income Taxes	1,141	18	912	68
Equity in Net Loss of Unconsolidated Entities (Net of Applicable Taxes)	(176)	(360)	(364)	(705)
Net (Loss) Income	(2,565)	(2,222)	(6,446)	1,290
Preferred Stock Dividends	1,305	1,076	3,916	1,920
Net (Loss) Income Available to Common Stockholders	$ (3,870)	$ (3,298)	$ (10,362)	$ (630)
Basic and Diluted Earnings Per Common Share:
Basic Earnings Per Common Share: (in dollars per share)	$ (0.53)	$ (0.46)	$ (1.42)	$ (0.09)
Diluted Earnings Per Common Share: (in dollars per share)	$ (0.53)	$ (0.46)	$ (1.42)	$ (0.09)
Weighted Average Shares of Common Stock Outstanding:
Basic (in shares)	7,301,657	7,248,350	7,278,695	7,233,807
Diluted (in shares)	7,301,657	7,248,350	7,278,695	7,233,807
Common Stock Dividends Per Share (in dollars per share)	$ 0.25	$ 0.25	$ 0.75	$ 0.75