CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (Unaudited) (USD $)	6 Months Ended
	Jun. 30, 2013	Jun. 30, 2012
Cash Flows from Operating Activities:
Net Income	$ 3,512,000	$ 8,640,000
Adjustments to Reconcile Net Income to Net Cash Provided by Operating Activities:
Depreciation	11,899,000	12,357,000
Amortization of Deferred Charges	4,239,000	3,926,000
Amortization of Intangible Assets	3,148,000	1,288,000
Non-Cash Share Based Compensation	721,000	544,000
Equity in Net Loss (Income) of Unconsolidated Entities	345,000	(581,000)
Gain on Sale of Assets	0	(4,466,000)
Gain on Sale of Investments	0	(66,000)
Gain on Foreign Currency Exchange	(5,017,000)	(1,914,000)
Changes in:
Deferred Drydocking Charges	(6,584,000)	(7,623,000)
Accounts Receivable	(1,774,000)	277,000
Inventories and Other Current Assets	3,852,000	(624,000)
Other Assets	301,000	1,950,000
Accounts Payable and Accrued Liabilities	641,000	(594,000)
Other Long-Term Liabilities	4,511,000	(3,204,000)
Net Cash Provided by Operating Activities	19,794,000	9,910,000
Cash Flows from Investing Activities:
Principal payments received under Direct Financing Leases	558,000	2,279,000
Capital Improvements to Vessels and Other Assets	(7,518,000)	(46,103,000)
Proceeds from Sale of Assets	0	130,315,000
Purchase of Marketable Securities	0	(5,000)
Proceeds from Sale of Marketable Securities	0	159,000
Investment in Unconsolidated Entities	(500,000)	(750,000)
Net Decrease/(Increase) in Restricted Cash Account	(9,825,000)	6,907,000
Acquisition of United Ocean Services, LLC	(2,475,000)	0
Proceeds from Note Receivables	3,657,000	2,507,000
Net Cash (Used In) Provided by Investing Activities	(16,103,000)	95,309,000
Cash Flows from Financing Activities:
Issuance of Preferred Stock	23,480,000	0
Proceeds from Issuance of Debt	22,000,000	41,175,000
Repayment of Debt	(41,840,000)	(141,559,000)
Additions to Deferred Financing Charges	(693,000)	(264,000)
Dividends Paid	(4,120,000)	(4,805,000)
Net Cash Used In Financing Activities	(1,173,000)	(105,453,000)
Net Increase (Decrease) in Cash and Cash Equivalents	2,518,000	(234,000)
Cash and Cash Equivalents at Beginning of Period	19,868,000	21,437,000
Cash and Cash Equivalents at End of Period	$ 22,386,000	$ 21,203,000