Condensed Consolidated Balance Sheets (USD $) In Thousands, unless otherwise specified	Sep. 30, 2014	Dec. 31, 2013
ASSETS
Cash and Cash Equivalents	$ 21,024	$ 20,010
Restricted Cash	1,387	8,499
Accounts Receivable, Net of Allowance for Doubtful Accounts	39,751	30,417
Prepaid Expenses	10,518	8,493
Deferred Tax Asset	633	3,084
Other Current Assets	1,038	1,029
Notes Receivable	3,204	3,987
Material and Supplies Inventory	11,243	11,322
Total Current Assets	88,798	86,841
Investment in Unconsolidated Entities	22,472	14,818
Vessels, Property, and Other Equipment, at Cost:
Vessels	630,090	582,416
Building	1,354	1,211
Land	623	623
Leasehold Improvements	26,348	26,348
Construction in Progress	4,867	2,673
Furniture and Equipment	12,272	11,727
Property, Plant and Equipment Total, Gross	675,554	624,998
Less - Accumulated Depreciation	(196,302)	(175,106)
Net Vessels, Property, Plant and Equipment	479,252	449,892
Other Assets:
Deferred Charges, Net of Accumulated Amortization	25,984	29,309
Intangible Assets, Net of Accumulated Amortization	25,669	28,756
Due from Related Parties	2,083	1,974
Notes Receivable	25,256	27,659
Goodwill	2,735	2,735
Deferred Tax Asset	8,866	7,325
Other	4,940	7,383
Other Assets Total	95,533	105,141
TOTAL ASSETS	686,055	656,692
Current Liabilities:
Current Maturities of Long-Term Debt	23,347	19,213
Accounts Payable and Other Accrued Expenses	54,901	51,220
Total Current Liabilities	78,248	70,433
Long-Term Debt, Less Current Maturities	230,156	179,016
Other Long-Term Liabilities:
Incentive Obligation	8,872	5,397
Other	47,046	65,306
TOTAL LIABILITIES	364,322	320,152
Stockholders' Equity:
Common Stock, $1.00 Par Value, 20,000,000 Shares Authorized, 7,301,669 and 7,203,935 Shares Issued and Outstanding at June 30, 2014 and December 31, 2013, Respectively	8,727	8,692
Additional Paid-In Capital	140,624	140,115
Retained Earnings	210,549	226,480
Treasury Stock, 1,388,066 Shares at June 30, 2014 and December 31, 2013, Respectively	(25,403)	(25,403)
Accumulated Other Comprehensive Loss	(13,330)	(13,910)
TOTAL STOCKHOLDERS' EQUITY	321,733	336,540
TOTAL LIABILITIES AND STOCKHOLDERS' EQUITY	686,055	656,692
9.50% Series A Preferred Stock [Member]
Stockholders' Equity:
Preferred Stock, $1.00 Par Value	250	250
9.00% Series B Preferred Stock [Member]
Stockholders' Equity:
Preferred Stock, $1.00 Par Value	$ 316	$ 316