DERIVATIVE FINANCIAL INSTRUMENTS Income statement location (Details) (Not Designated as Hedging Instrument [Member], USD $) In Thousands	3 Months Ended		9 Months Ended
	Jun. 30, 2011	Jun. 30, 2010	Jun. 30, 2011	Jun. 30, 2010
Interest Rate Contracts [Member] | Net Trading Profits [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Amount of gain (loss) on derivatives recognized in income	$ (339)	$ (3,419)	$ 3,836	$ (1,774)
Interest Rate Contracts [Member] | Other Revenues [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Amount of gain (loss) on derivatives recognized in income	0	1	0	(286)
Loan Commitments [Member] | Other Expenses [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Amount of gain (loss) on derivatives recognized in income	1	2	91	33
Forward Sale Contracts [Member] | Other Revenues [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Amount of gain (loss) on derivatives recognized in income	$ 0	$ 25	$ 0	$ (222)