Derivatives and Hedging Activities (Narrative) (Detail) (USD $)
3 Months Ended
Sep. 30, 2012
Jun. 30, 2012
Derivative [Line Items]    
Fixed rate loan hedged, original maturity term 20 years 20 years
Loans receivable, outstanding principal balance $ 11,451,000 $ 11,536,000
Notional value of interest rate swap $ 11,451,000 $ 11,536,000