Condensed Consolidated Statements Of Operations - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Condensed Consolidated Statements Of Operations [Abstract]
Revenues	$ 66,509	$ 74,410	$ 201,843	$ 223,856
Operating Expenses
Voyage Expenses	52,569	55,450	158,589	170,685
Amortization Expense	3,657	6,142	13,192	16,791
Vessel Depreciation	5,740	6,291	16,773	19,528
Other Depreciation	185	181	556	545
Administrative and General Expenses	5,476	5,271	15,286	15,828
Impairment Loss	3,042		4,870
(Gain) Loss on Sale of Assets	106	1	(4,573)	1
Total Operating Expenses	70,775	73,336	204,693	223,378
Operating Income (Loss)	(4,266)	1,074	(2,850)	478
Interest and Other
Interest Expense	3,194	2,890	8,306	7,076
Derivative (Gain) Loss		(89)	2,991	(57)
Loss on Extinguishment of Debt		225	355	225
Other Income from Vessel Financing	(463)	(456)	(1,378)	(1,417)
Investment Income	(5)	(278)	(29)	(302)
Foreign Exchange Loss		30	91	123
Total Interest and Other Income	2,726	2,322	10,336	5,648
Loss Before Provision for Income Taxes and Equity in Net Income (Loss) of Unconsolidated Entities	(6,992)	(1,248)	(13,186)	(5,170)
Provision for Income Taxes	373	1,141	405	912
Equity in Net Income (Loss) of Unconsolidated Entities (Net of Applicable Taxes)	158	(176)	1,716	(364)
Net Loss	(7,207)	(2,565)	(11,875)	(6,446)
Preferred Stock Dividends	1,305	1,305	3,916	3,916
Net Loss Attributable to Common Stockholders	$ (8,512)	$ (3,870)	$ (15,791)	$ (10,362)
Loss Per Common Share:
Basic (in dollars per share)	$ (1.16)	$ (0.53)	$ (2.16)	$ (1.42)
Diluted (in dollars per share)	$ (1.16)	$ (0.53)	$ (2.16)	$ (1.42)
Weighted Average Shares of Common Stock Outstanding:
Basic (in shares)	7,333,406	7,301,657	7,322,071	7,278,695
Diluted (in shares)	7,333,406	7,301,657	7,322,071	7,278,695
Common Stock Dividends Per Share (in dollars per share)	$ 0.05	$ 0.25	$ 0.35	$ 0.75