Investments In Securities (Schedule Of Gross Realized Gains And Losses On Securities) (Details) (USD $)	3 Months Ended
	Mar. 31, 2014	Mar. 31, 2013
Schedule of Available-for-sale Securities [Line Items]
Total, Gross realized gains	$ 765,272	$ 67,876
Other than temporary impairment of securities	0	0
Total, Gross realized losses	0	(37,879)
Net realized gain from securities	765,272	29,997
Impairments of other investments	(10,062)	(18,485)
Gain on other investments	0	4,832
Loss On Other Investments	(263,073)	0
Total	(273,135)	(13,653)
Net Realized Gain	492,137	16,344
General Obligations Of U.S. States, Territories And Political Subdivisions
Schedule of Available-for-sale Securities [Line Items]
Total, Gross realized gains	0	0
Corporate Debt Securities
Schedule of Available-for-sale Securities [Line Items]
Total, Gross realized gains	0	0
Common Stocks And Nonredeemable Preferred Stocks
Schedule of Available-for-sale Securities [Line Items]
Total, Gross realized gains	765,272	67,876
Common stocks and nonredeemable preferred stocks	0	(37,879)
Auction Rate Securities
Schedule of Available-for-sale Securities [Line Items]
Total, Gross realized gains	$ 0	$ 0