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Consolidated Statements of Comprehensive Income (Parenthetical) (USD $)
9 Months Ended 12 Months Ended
Dec. 31, 2012
Mar. 31, 2012
Mar. 31, 2011
Statement of Other Comprehensive Income [Abstract]      
Taxes on Unrealized Holding Gains On Securities Available For Sale $ 909,507 $ 2,649,001 $ 16,937
Taxes on Reclassification Adjustment For Gains Included In Net Income $ 359,281 $ 874,097 $ 577,828