Consolidated Statements Of Income (USD $) In Thousands, except Share data, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Consolidated Statements Of Income [Abstract]
Revenues	$ 310,152	$ 243,496	$ 263,196
Operating Expenses:
Voyage Expenses	247,622	185,453	190,150
Amortization Expense	5,701	3,055	1,932
Vessel Depreciation	24,363	24,366	25,388
Other Depreciation	69	32
Administrative and General Expenses	22,734	23,244	20,961
Gain on Dry Bulk Transaction			(18,844)
Loss/(Gain) on Sale of Other Assets	16	(16,625)
Total Operating Expenses	300,505	219,525	219,587
Operating Income	9,647	23,971	43,609
Interest and Other:
Interest Expense	9,504	10,409	10,361
Derivative Loss	438	485	101
(Gain)/Loss on Sale of Investment		(580)	747
Other Income from Vessel Financing	(2,122)	(2,387)	(2,653)
Investment Income	(114)	(470)	(637)
Foreign Exchange (Gain)/Loss	(5,914)	(5,506)	3,051
Total Interest and Other Income	1,792	1,951	10,970
Income Before Provision (Benefit) for Income Taxes and Equity in Net Loss of Unconsolidated Entities	7,855	22,020	32,639
Provision/(Benefit) for Income Taxes	(11,963)	(157)	680
Equity in Net Loss of Unconsolidated Entities (Net of Applicable Taxes)	(1,661)	(215)	(410)
Net Income	18,157	21,962	31,549
Preferred Stock Dividends	3,226
Net Income Available to Common Stockholders	$ 14,931	$ 21,962	$ 31,549
Basic and Diluted Earnings per Common Share:
Basic Earnings Per Common Share: (in dollars per share)	$ 2.06	$ 3.05	$ 4.42
Diluted Earnings Per Common Share: (in dollars per share)	$ 2.05	$ 3.04	$ 4.40
Weighted Average Shares of Common Stock Outstanding:
Basic (in shares)	7,237,472	7,195,606	7,131,820
Diluted (in shares)	7,282,676	7,213,288	7,176,647
Common Stock Dividends Per Share (in dollars per share)	$ 1.00	$ 1.00	$ 1.50