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Investments In Securities And Fair Value (Schedule Of Estimated Fair Value Hierarchy Of Investments And Related Impairments Recognized) (Details) (USD $)
 12 Months Ended
Dec. 31, 2012
Dec. 31, 2011
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Total cost method investments and other assets, Total at Estimated Fair Value $ 36,406 $ 75,281
Total cost method investments and other assets, Impairment Losses (6,504) (44,404)
Level 1 [Member]
    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Total cost method investments and other assets, Total at Estimated Fair Value 0 0
Level 2 [Member]
    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Total cost method investments and other assets, Total at Estimated Fair Value 0 0
Level 3 [Member]
    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Total cost method investments and other assets, Total at Estimated Fair Value 36,406 75,281
Cost Method Investment [Member]
    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Valuation Method Fair Value Fair Value
Impaired Yes Yes
Total cost method investments and other assets, Total at Estimated Fair Value 36,406 58,281
Total cost method investments and other assets, Impairment Losses (6,504) (28,904)
Cost Method Investment [Member] | Level 1 [Member]
    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Total cost method investments and other assets, Total at Estimated Fair Value 0 0
Cost Method Investment [Member] | Level 2 [Member]
    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Total cost method investments and other assets, Total at Estimated Fair Value 0 0
Cost Method Investment [Member] | Level 3 [Member]
    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Total cost method investments and other assets, Total at Estimated Fair Value 36,406 58,281
Other Assets [Member]
    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Valuation Method Fair Value Fair Value
Impaired Yes Yes
Total cost method investments and other assets, Total at Estimated Fair Value 0 17,000
Total cost method investments and other assets, Impairment Losses 0 (15,500)
Other Assets [Member] | Level 1 [Member]
    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Total cost method investments and other assets, Total at Estimated Fair Value 0 0
Other Assets [Member] | Level 2 [Member]
    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Total cost method investments and other assets, Total at Estimated Fair Value 0 0
Other Assets [Member] | Level 3 [Member]
    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Total cost method investments and other assets, Total at Estimated Fair Value $ 0 $ 17,000