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Derivatives and Hedging Activities (Details 2) (USD $)
In Thousands
3 Months Ended
Jun. 30, 2011
Jun. 30, 2010
Gains and losses recognized in income on non-designated hedging instruments    
Gains and losses recognized in income on non-designated hedging instruments $ 282 $ 754
Mortgage loan commitments [Member] | Other income [Member]
   
Gains and losses recognized in income on non-designated hedging instruments    
Gains and losses recognized in income on non-designated hedging instruments 107 2,818
Forward sales contracts [Member] | Other income [Member]
   
Gains and losses recognized in income on non-designated hedging instruments    
Gains and losses recognized in income on non-designated hedging instruments $ 175 $ (2,064)