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MARKETABLE EQUITY SECURITIES (Details) (USD $)
3 Months Ended 3 Months Ended 12 Months Ended
Mar. 31, 2013
Mar. 31, 2012
Dec. 31, 2012
Mar. 31, 2013
Equity Securities [Member]
Dec. 31, 2012
Equity Securities [Member]
MARKETABLE EQUITY SECURITIES [Abstract]          
Impairment charges on investments in marketable securities $ 24,000        
Available-for-sale securities [Abstract]          
Fair market value 18,855,000   17,188,000 1,392,000 1,567,000
Cost 10,334,000   10,361,000    
Unrealized gain 8,521,000   6,827,000    
Trading securities [Abstract]          
Fair market value 145,000   132,000 145,000 129,000
Cost 157,000   158,000    
Unrealized loss (12,000) (26,000)      
Total [Abstract]          
Fair market value 19,000,000   17,320,000 1,537,000 1,696,000
Cost 10,491,000   10,519,000    
Unrealized gain 8,509,000 6,801,000   69,000 159,000
Available-for-sale securities [Abstract]          
Gross unrealized gains 8,578,000   6,960,000    
Gross unrealized losses 57,000   133,000 57,000 133,000
Unrealized gain 8,521,000   6,827,000    
Accumulated other comprehensive income 5,286,000   4,235,000    
Net unrealized gains in market value on securities classified as available-for-sale 986,000 459,000      
Trading securities recognized loss 12,000 4,000      
Trading securities, recognized gain 0 2,000      
Trading securities [Abstract]          
Recognized loss at beginning of period (26,000) (16,000)      
Recognized (loss) gain at end of period (12,000) 2,000      
Net recognized gain 14,000 18,000      
Net recognized gain (loss), net of taxes 9,000 11,000      
Realized gains [Abstract]          
Sale proceeds 13,000 526,000      
Cost of securities sold 6,000 229,000      
Realized gains 7,000 297,000      
Realized gains, net of taxes 4,000 179,000      
Summary of gross unrealized losses and fair value of securities [Abstract]          
Equity securities - Available-for-sale, Fair Value 18,855,000   17,188,000 1,392,000 1,567,000
Equity securities - Trading, Fair Value 145,000   132,000 145,000 129,000
Fair market value 19,000,000   17,320,000 1,537,000 1,696,000
Equity securities - Available-for-sale, Unrealized Losses 57,000   133,000 57,000 133,000
Equity securities - Trading, Unrealized Losses       12,000 26,000
Totals, Unrealized Losses 8,509,000 6,801,000   69,000 159,000
Margin account borrowings $ 10,554,000   $ 10,711,000