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Investments In Securities (Schedule Of Gross Realized Gains And Losses On Securities) (Details) (USD $)
 3 Months Ended 9 Months Ended 12 Months Ended
Sep. 30, 2013
Sep. 30, 2012
Sep. 30, 2013
Sep. 30, 2012
Dec. 31, 2012
Schedule of Available-for-sale Securities [Line Items]          
Total, Gross realized gains     $ 365,922 $ 321,175  
Other than temporary impairment of securities     0 (76,539) (93,436)
Total, Gross realized losses     (21,106) (168,514)  
Net realized gain from securities     344,816 152,661  
Impairments of other investments     (34,070) 0  
Gain on other investments     25,308 205,158  
Loss On Other Investments     (2,500) 0  
Total     (11,262) 205,158  
Net Realized Gain 261,938 99,790 333,554 357,819  
General Obligations Of U.S. States, Territories And Political Subdivisions
          
Schedule of Available-for-sale Securities [Line Items]          
Total, Gross realized gains     0 250  
Corporate Debt Securities
          
Schedule of Available-for-sale Securities [Line Items]          
Total, Gross realized gains     0 2,612  
Common Stocks And Nonredeemable Preferred Stocks
          
Schedule of Available-for-sale Securities [Line Items]          
Total, Gross realized gains     365,922 199,977  
Common stocks and nonredeemable preferred stocks     (21,106) (91,975)  
Auction Rate Securities
          
Schedule of Available-for-sale Securities [Line Items]          
Total, Gross realized gains     $ 0 $ 118,336