DERIVATIVE FINANCIAL INSTRUMENTS, Balance Sheet Location (Details) (Derivatives not designated as hedging instruments [Member], Interest rate contracts [Member], USD $) In Thousands	Sep. 30, 2011		Sep. 30, 2010
Trading instruments [Member]
Asset derivatives [Abstract]
Notional amount	$ 2,248,150		$ 1,130,767
Fair value	126,867	[1]	102,490	[1]
Trading instruments sold [Member]
Liabilities derivatives [Abstract]
Notional amount	1,722,820		1,172,927
Fair value	$ 112,457	[1]	$ 86,309	[1]

[1] The fair value in this table is presented on a gross basis before netting of cash collateral and by counterparty according to our legally enforceable master netting arrangements. The fair value in the Consolidated Statements of Financial Condition is presented net.