Condensed Consolidated Statements Of Operations - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Condensed Consolidated Statements Of Operations [Abstract]
Revenues	$ 67,308	$ 76,752	$ 135,334	$ 149,446
Operating Expenses
Voyage Expenses	53,809	57,802	106,020	115,235
Amortization Expense	4,348	5,486	9,535	10,649
Vessel Depreciation	5,490	6,516	11,033	13,237
Other Depreciation	187	180	371	364
Administrative and General Expenses	4,788	5,108	9,810	10,557
Impairment Loss	1,828		1,828
Gain on Sale of Other Assets	(4,747)		(4,679)
Total Operating Expenses	65,703	75,092	133,918	150,042
Operating Income (Loss)	1,605	1,660	1,416	(596)
Interest and Other
Interest Expense	2,444	2,041	5,112	4,186
Derivative Loss	181	18	2,991	32
Loss on Extinguishment of Debt	260		355
Other Income from Vessel Financing	(470)	(472)	(915)	(961)
Investment Income	(17)	(5)	(24)	(24)
Foreign Exchange Loss	46	9	91	93
Total Interest and Other Income	2,444	1,591	7,610	3,326
Income (Loss) Before Provision (Benefit) for Income Taxes and Equity in Net Income (Loss) of Unconsolidated Entities	(839)	69	(6,194)	(3,922)
Provision (Benefit) for Income Taxes	(7)	653	32	(229)
Equity in Net Income (Loss) of Unconsolidated Entities (Net of Applicable Taxes)	665	(80)	1,558	(188)
Net Loss	(167)	(664)	(4,668)	(3,881)
Preferred Stock Dividends	1,306	1,305	2,611	2,611
Net Loss Attributable to Common Stockholders	$ (1,473)	$ (1,969)	$ (7,279)	$ (6,492)
Loss Per Common Share:
Basic (in dollars per share)	$ (0.20)	$ (0.27)	$ (0.99)	$ (0.89)
Diluted (in dollars per share)	$ (0.20)	$ (0.27)	$ (0.99)	$ (0.89)
Weighted Average Shares of Common Stock Outstanding:
Basic (in shares)	7,324,050	7,281,807	7,316,309	7,267,023
Diluted (in shares)	7,324,050	7,281,807	7,316,309	7,267,023
Common Stock Dividends Per Share (in dollars per share)	$ 0.05	$ 0.25	$ 0.30	$ 0.50