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MARKETABLE SECURITIES (Details) (USD $)
12 Months Ended
Dec. 31, 2013
Dec. 31, 2012
Dec. 31, 2011
Equity securities available-for-sale      
Cost $ 2,707,000 $ 1,378,000  
Accumulated net unrealized gain (loss) 772,000 (143,000)  
Fair value 3,479,000 1,235,000  
Unrealized gain (loss) 800,000 (100,000)  
Realized loss 0 0 3,355,000
Avance Gas [Member]
     
Equity securities available-for-sale      
Shares received 108,069    
Kightsbridge [Member]
     
Equity securities available-for-sale      
Shares received 8,766 2,825  
Payment for shares 0    
Income earned on shares 60,000 20,000  
Overseas Shipholding Group Inc [Member]
     
Equity securities available-for-sale      
Proceeds from sale of available-for-sale securities 0 0 46,547,000
Realized loss $ 0 $ 0 $ 3,355,000