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Mortgage Banking Activities - Activity in Valuation Allowance for Mortgage Servicing Rights (Detail) (USD $)
12 Months Ended
Jun. 30, 2013
Jun. 30, 2012
Jun. 30, 2011
Mortgage Banking [Abstract]      
Balance, beginning of period $ (816,481) $ (304,001) $ 0
Impairment charges (765,858) (698,468) (1,183,799)
Impairment recoveries 587,771 185,988 879,798
Balance, end of period $ (994,568) $ (816,481) $ (304,001)