Annual report pursuant to Section 13 and 15(d)

Trading Securities (Schedule Of Change In Investment In Securities) (Details)

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Trading Securities (Schedule Of Change In Investment In Securities) (Details) - Trading Securities [Member] - USD ($)
12 Months Ended
Dec. 31, 2015
Dec. 31, 2014
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]    
Fair Value at Beginning of Year $ 6,026,780 $ 6,609,561
Proceeds from Sale (3,060,675) (8,579,373)
Gain (Loss) on Sale (1,460,576) 5,989,218
Change In Unrealized Gain (Loss) (1,181,085) 2,007,374
Fair Value at End of Year $ 324,444 $ 6,026,780