Derivatives and Hedging Activities (Details) (USD $)	9 Months Ended
	Jun. 30, 2014	Sep. 30, 2013
Interest rate swap agreements
Derivative [Line Items]
Notional amount	$ 256,007,000	$ 83,594,000
Gain (loss) on derivative instruments	0
Fee income included in miscellaneous loan fees	838,000
Commitments to purchase MBS
Derivative [Line Items]
Notional amount	50,000,000	200,000,000
Other assets | Interest rate contracts
Derivative [Line Items]
Asset Derivatives, Fair Value	2,731,000	7,000
Other liabilities | Interest rate contracts
Derivative [Line Items]
Liability Derivatives, Fair Value	2,731,000	7,000
AFS securities | Commitments to purchase MBS
Derivative [Line Items]
Asset Derivatives, Fair Value	$ 0	$ 3,188,000