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MARKETABLE EQUITY SECURITIES (Details) (USD $)
 3 Months Ended 9 Months Ended 12 Months Ended
Sep. 30, 2012
Sep. 30, 2011
Sep. 30, 2012
Sep. 30, 2011
Dec. 31, 2011
MARKETABLE EQUITY SECURITIES [Abstract]          
Impairment charges on investments in marketable securities $ 20,000 $ 30,000 $ 63,000 $ 223,000  
Available-for-sale Securities          
Fair market value 18,361,000   18,361,000   20,123,000
Cost 10,984,000   10,984,000   12,539,000
Unrealized gain 7,377,000   7,377,000   7,584,000
Trading securities          
Fair market value 129,000   129,000   141,000
Cost 157,000   157,000   157,000
Unrealized loss     (28,000)   (16,000)
Total          
Fair market value 18,490,000   18,490,000   20,264,000
Cost 11,141,000   11,141,000   12,696,000
Unrealized gain     7,349,000   7,568,000
Available-for-sale securities:          
Gross unrealized gains 7,476,000   7,476,000   7,866,000
Gross unrealized losses (99,000)   (99,000)   (282,000)
Unrealized gain 7,377,000   7,377,000   7,584,000
Accumulated other comprehensive income 4,576,000   4,576,000   4,705,000
Net unrealized gains in market value on securities classified as available-for-sale     1,065,000   825,000
Trading securities, recognized gain     0 0  
Trading securities recognized loss     28,000 37,000  
Trading securities          
Recognized (loss) gain at beginning of period (13,000) (4,000) (16,000) 14,000 14,000
Recognized loss at end of period (28,000) (37,000) (28,000) (37,000) (16,000)
Net recognized (loss) gain for the period (15,000) (33,000) (12,000) (51,000)  
Net recognized (loss) gain for the period, net of taxes (9,000) (20,000) (7,000) (31,000)  
Marketable securities reclassifications     0 0  
Realized gains          
Sale proceeds 1,407,000 0 3,558,000 966,000  
Cost of securities sold 450,000 0 1,561,000 189,000  
Realized gains 957,000 0 1,997,000 777,000  
Realized gains, net of taxes 569,000 0 1,194,000 470,000  
Investments that had been in a continuous unrealized loss position for twelve months or longer 0   0   0
Minimum period for continuous unrealized loss position (in months)     12    
Summary of gross unrealized losses and fair value of securities [Abstract]          
Equity securities - Available-for-sale, Fair Value 18,361,000   18,361,000   20,123,000
Equity securities - Trading, Fair Value 129,000   129,000   141,000
Total, Fair Value 18,490,000   18,490,000   20,264,000
Equity securities - Available-for-sale, Unrealized Losses 99,000   99,000   282,000
Totals, Unrealized Losses     7,349,000   7,568,000
Outstanding borrowings 4,893,000   4,893,000   0
Equity Securities [Member]
          
Available-for-sale Securities          
Fair market value 1,710,000   1,710,000   2,914,000
Trading securities          
Fair market value 129,000   129,000   141,000
Total          
Fair market value 1,839,000   1,839,000   3,055,000
Unrealized gain     128,000   298,000
Available-for-sale securities:          
Gross unrealized losses (99,000)   (99,000)   (282,000)
Summary of gross unrealized losses and fair value of securities [Abstract]          
Equity securities - Available-for-sale, Fair Value 1,710,000   1,710,000   2,914,000
Equity securities - Trading, Fair Value 129,000   129,000   141,000
Total, Fair Value 1,839,000   1,839,000   3,055,000
Equity securities - Available-for-sale, Unrealized Losses 99,000   99,000   282,000
Equity securities - Trading, Unrealized Losses     29,000   16,000
Totals, Unrealized Losses     $ 128,000   $ 298,000