CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (USD $)	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Cash Flows from Operating Activities:
Net Income	$ 21,962,000	$ 31,549,000	$ 15,302,000
Adjustments to Reconcile Net Income to Net Cash Provided by Operating Activities:
Depreciation expense	24,975,000	26,391,000	18,898,000
Amortization of Deferred Charges and Other Assets	11,034,000	8,954,000	6,569,000
Deferred Tax	(453,000)	0	(1,982,000)
Gain on Dry Bulk Transaction	0	(18,844,000)	0
Impairment Loss	0	0	25,430,000
Non-Cash Stock Based Compensation	1,216,000	1,801,000	2,341,000
Equity in Net Income of Unconsolidated Entities	215,000	410,000	(9,282,000)
Distributions from Unconsolidated Entities	0	750,000	3,000,000
Gain on Purchase / Sale of Assets	(16,625,000)	0	(42,000)
(Gain) Loss on Sale of Investments	(580,000)	747,000	(213,000)
(Gain) Loss on Foreign Currency Exchange	(5,506,000)	3,051,000	8,196,000
Changes in:
Deferred Drydocking Charges	(11,304,000)	(6,803,000)	(2,516,000)
Accounts Receivable	(3,533,000)	(1,290,000)	4,737,000
Inventories and Other Current Assets	(2,734,000)	(1,200,000)	(1,287,000)
Other Assets	2,121,000	669,000	1,337,000
Accounts Payable and Accrued Liabilities	(6,481,000)	3,133,000	(3,906,000)
Other Long-Term Liabilities	(4,473,000)	(3,045,000)	(2,195,000)
Net Cash Provided by Operating Activities	9,834,000	46,273,000	64,387,000
Cash Flows from Investing Activities:
Principal payments received under Direct Financing Leases	3,877,000	5,583,000	5,522,000
Acquisition of Frascati Shops Inc and Tower, LLC	(620,000)	0	0
Capital Improvements to Vessels and Other Assets	(50,729,000)	(109,631,000)	(123,146,000)
Proceeds from Sale of Assets	225,315,000	0	3,853,000
Purchase of Marketable Securities	0	(74,000)	(11,008,000)
Proceeds from Sale of Marketable Securities	12,433,000	2,413,000	9,615,000
Investment in Unconsolidated Entities	(1,000,000)	(2,545,000)	(4,949,000)
Acquisition of Unconsolidated Entity	0	7,092,000	0
Net Decrease (Increase) in Restricted Cash Account	(1,093,000)	(8,907,000)	0
Proceeds from Sale of Unconsolidated Entities	0	526,000	0
Acquisition of United Ocean Services, LLC	(112,242,000)	0	0
Changes in Other Notes Receivables	0	0	0
Proceeds from Note Receivables	4,754,000	4,735,000	5,167,000
Net Cash Provided by (Used In) Investing Activities	80,695,000	(100,808,000)	(114,946,000)
Cash Flows from Financing Activities:
Common Stock Repurchase	0	0	(5,231,000)
Proceeds from Issuance of Debt	137,930,000	135,330,000	153,476,000
Repayment of Debt	(220,337,000)	(66,498,000)	(108,029,000)
Additions to Deferred Financing Charges	(1,274,000)	(1,788,000)	(1,155,000)
Common Stock Dividends Paid	(8,417,000)	(10,981,000)	(11,882,000)
Net Cash (Used In) Provided by Financing Activities	(92,098,000)	56,063,000	27,179,000
Net (Decrease) Increase in Cash and Cash Equivalents	(1,569,000)	1,528,000	(23,380,000)
Cash and Cash Equivalents at Beginning of Period	21,437,000	19,909,000	43,289,000
Cash and Cash Equivalents at End of Period	19,868,000	21,437,000	19,909,000
Noncash investing activities:
Reclassification of direct financing lease to vessels	$ 0	$ 0	$ 48,093,000