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4. SUPPLEMENTAL CASH FLOW INFORMATION (Detail) - Supplemental Cash Flow Information (USD $)
In Millions, unless otherwise specified
9 Months Ended
Sep. 30, 2012
Sep. 30, 2011
Interest $ 518,111 $ 742,106
Federal, state and local income taxes,    
net of refunds 340,764 2,107,815
Fixed asset purchases in accounts payable $ 235,902 $ 314,146