Quarterly report pursuant to Section 13 or 15(d)

Consolidated Statements of Comprehensive Income (Unaudited) (Parenthetical)

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Consolidated Statements of Comprehensive Income (Unaudited) (Parenthetical) (USD $)
3 Months Ended
Feb. 29, 2012
Feb. 28, 2011
Consolidated Statements of Comprehensive Income [Abstract]    
Unrealized holding gains ,net of deferred tax (expense) benefit $ (112,097) $ (38,957)