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FAIR VALUE MEASUREMENTS (Details) (Recurring, USD $)
Dec. 31, 2012
Dec. 31, 2011
Inputs, Level 1
   
Available-for Sale Securities -    
U.S. Treasury Bills Maturing in the following year      
Trading Securities:    
Domestic Equities 211,103 275,516
International Equities 115,106 95,223
Others 63,126 28,225
Inputs, Level 2
   
Available-for Sale Securities -    
U.S. Treasury Bills Maturing in the following year 6,652,590 6,654,838
Trading Securities:    
Domestic Equities      
International Equities      
Others      
Inputs, Level 3
   
Available-for Sale Securities -    
U.S. Treasury Bills Maturing in the following year      
Trading Securities:    
Domestic Equities      
International Equities      
Others