Derivatives and Hedging Activities (Schedule of Effect of Derivative Instruments on Statement of Income) (Detail) (Non Interest Income [Member], USD $)
In Thousands, unless otherwise specified
3 Months Ended
Sep. 30, 2012
Sep. 30, 2011
Non Interest Income [Member]
   
Derivative [Line Items]    
Interest rate contracts, amount of gain (loss) recognized in income $ 37 $ (330)