TRADING INSTRUMENTS AND TRADING INSTRUMENTS SOLD BUT NOT YET PURCHASED (Details) (USD $) In Thousands	Jun. 30, 2011	Sep. 30, 2010
TRADING INSTRUMENTS AND TRADING INSTRUMENTS SOLD BUT NOT YET PURCHASED [Line Items]
Trading Instruments	$ 575,077	$ 591,447
Instruments Sold but Not Yet Purchased	195,793	131,038
Total Debt Securities [Member]
TRADING INSTRUMENTS AND TRADING INSTRUMENTS SOLD BUT NOT YET PURCHASED [Line Items]
Trading Instruments	507,637	530,593
Instruments Sold but Not Yet Purchased	175,706	100,725
Total Debt Securities [Member] \| Municipal and Provincial Obligations [Member]
TRADING INSTRUMENTS AND TRADING INSTRUMENTS SOLD BUT NOT YET PURCHASED [Line Items]
Trading Instruments	184,097	168,353
Instruments Sold but Not Yet Purchased	720	296
Total Debt Securities [Member] \| Corporate Obligations [Member]
TRADING INSTRUMENTS AND TRADING INSTRUMENTS SOLD BUT NOT YET PURCHASED [Line Items]
Trading Instruments	37,151	38,471
Instruments Sold but Not Yet Purchased	1,610	693
Total Debt Securities [Member] \| Government and Agency Obligations [Member]
TRADING INSTRUMENTS AND TRADING INSTRUMENTS SOLD BUT NOT YET PURCHASED [Line Items]
Trading Instruments	41,366	36,894
Instruments Sold but Not Yet Purchased	173,371	99,631
Total Debt Securities [Member] \| Agency MBS and CMOs [Member]
TRADING INSTRUMENTS AND TRADING INSTRUMENTS SOLD BUT NOT YET PURCHASED [Line Items]
Trading Instruments	232,217	278,578
Instruments Sold but Not Yet Purchased	5	105
Total Debt Securities [Member] \| Non Agency CMOs and ABS [Member]
TRADING INSTRUMENTS AND TRADING INSTRUMENTS SOLD BUT NOT YET PURCHASED [Line Items]
Trading Instruments	12,806	8,297
Instruments Sold but Not Yet Purchased	0	0
Total Debt Securities [Member] \| Auction Rate Securities [Member]
TRADING INSTRUMENTS AND TRADING INSTRUMENTS SOLD BUT NOT YET PURCHASED [Line Items]
Trading Instruments	7,400	9,100
Derivative Contracts [Member]
TRADING INSTRUMENTS AND TRADING INSTRUMENTS SOLD BUT NOT YET PURCHASED [Line Items]
Trading Instruments	21,870	26,367
Instruments Sold but Not Yet Purchased	262	1,649
Equity Securities [Member]
TRADING INSTRUMENTS AND TRADING INSTRUMENTS SOLD BUT NOT YET PURCHASED [Line Items]
Trading Instruments	34,131	31,644
Instruments Sold but Not Yet Purchased	19,675	28,664
Other Securities [Member]
TRADING INSTRUMENTS AND TRADING INSTRUMENTS SOLD BUT NOT YET PURCHASED [Line Items]
Trading Instruments	11,439	2,843
Instruments Sold but Not Yet Purchased	$ 150	$ 0

Carrying value as of the balance sheet date of obligations incurred from short sales.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher AICPA
-Name Audit and Accounting Guide (AAG)
-Number AAG-BRD
-Chapter 7
-Paragraph 40
-IssueDate 2006-05-01
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 940
-SubTopic 320
-Section 35
-Paragraph 1
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=6475908&loc=d3e42429-110968

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher AICPA
-Name Audit and Accounting Guide (AAG)
-Number AAG-BRD
-Chapter 4
-Paragraph 38
-IssueDate 2006-05-01
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 4: http://www.xbrl.org/2003/role/presentationRef
-Publisher AICPA
-Name Audit and Accounting Guide (AAG)
-Number AAG-BRD
-Chapter 7
-Paragraph 19
-IssueDate 2006-05-01
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 5: http://www.xbrl.org/2003/role/presentationRef
-Publisher AICPA
-Name Audit and Accounting Guide (AAG)
-Number AAG-BRD
-Chapter 7
-Paragraph 2
-IssueDate 2006-05-01
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

+ Details

- Definition

The total of financial instruments that are bought and held principally for the purpose of selling them in the near term (thus held for only a short period of time) or for debt and equity securities formerly categorized as available-for-sale or held-to-maturity which the entity held as of the date it opted to account for such securities at fair value. An enterprise may also categorize such a security as trading without the intent to sell it in the near term assuming the decision to categorize the security as trading occurred at acquisition.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Glossary Trading Securities
-URI http://asc.fasb.org/extlink&oid=6526789

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 115
-Paragraph 12
-Subparagraph a
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 159
-Paragraph 29
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 4: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 115
-Paragraph 13
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 5: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
-SubTopic 210
-Section S99
-Paragraph 1
-Subparagraph (SX 210.9-03.4)
-URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878

Reference 6: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 320
-SubTopic 10
-Section 45
-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=6871852&loc=d3e26626-111562

Reference 7: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Implementation Guide (Q and A)
-Number FAS115
-Paragraph 35
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 8: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 320
-SubTopic 10
-Section 45
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=6871852&loc=d3e26610-111562

+ Details