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Note E - Allowance for Losses on Loans Credit Risk Profile Based on Payment Activity (Details) (USD $)	Jun. 30, 2011	Sep. 30, 2010	Jun. 30, 2010
Financing Receivable, Recorded Investment [Line Items]
Loans receivable, gross	$ 8,386,503,000	$ 8,777,106,000
Nonaccrual loans by portfolio segment	232,752,000	245,532,000	292,335,000
Residential Portfolio Segment [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans receivable, gross	6,281,072,000	6,551,837,000
Nonaccrual loans by portfolio segment	129,798,000	115,155,000
Residential Portfolio Segment [Member] | Nonperforming Financing Receivable [Member]
Financing Receivable, Recorded Investment [Line Items]
Nonaccrual loans by portfolio segment	129,798,000
Percentage of Total Gross Loans	2.10%
Residential Portfolio Segment [Member] | Pass [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans receivable, gross	6,149,861,000
Residential Portfolio Segment [Member] | Special Mention [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans receivable, gross	0
Residential Portfolio Segment [Member] | Substandard [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans receivable, gross	131,211,000
Residential Portfolio Segment [Member] | Doubtful [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans receivable, gross	0
Residential Portfolio Segment [Member] | Performing Financing Receivable [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans receivable, gross	6,151,274,000
Grade as Percentage of Total Gross Loans	97.90%
Construction, Speculative [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans receivable, gross	143,964,000	169,712,000
Nonaccrual loans by portfolio segment	24,539,000	39,915,000
Construction, Speculative [Member] | Nonperforming Financing Receivable [Member]
Financing Receivable, Recorded Investment [Line Items]
Nonaccrual loans by portfolio segment	24,539,000
Percentage of Total Gross Loans	17.00%
Construction, Speculative [Member] | Pass [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans receivable, gross	31,871,000
Construction, Speculative [Member] | Special Mention [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans receivable, gross	5,484,000
Construction, Speculative [Member] | Substandard [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans receivable, gross	106,609,000
Construction, Speculative [Member] | Doubtful [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans receivable, gross	0
Construction, Speculative [Member] | Performing Financing Receivable [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans receivable, gross	119,425,000
Grade as Percentage of Total Gross Loans	83.00%
Construction, Custom [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans receivable, gross	270,894,000	256,384,000
Nonaccrual loans by portfolio segment	0	0
Construction, Custom [Member] | Nonperforming Financing Receivable [Member]
Financing Receivable, Recorded Investment [Line Items]
Nonaccrual loans by portfolio segment	0
Percentage of Total Gross Loans	0.00%
Construction, Custom [Member] | Pass [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans receivable, gross	270,894,000
Construction, Custom [Member] | Special Mention [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans receivable, gross	0
Construction, Custom [Member] | Substandard [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans receivable, gross	0
Construction, Custom [Member] | Doubtful [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans receivable, gross	0
Construction, Custom [Member] | Performing Financing Receivable [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans receivable, gross	270,894,000
Grade as Percentage of Total Gross Loans	100.00%
Land, Acquisition and Development [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans receivable, gross	230,901,000	307,230,000
Nonaccrual loans by portfolio segment	51,100,000	64,883,000
Land, Acquisition and Development [Member] | Nonperforming Financing Receivable [Member]
Financing Receivable, Recorded Investment [Line Items]
Nonaccrual loans by portfolio segment	51,100,000
Percentage of Total Gross Loans	22.10%
Land, Acquisition and Development [Member] | Pass [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans receivable, gross	42,791,000
Land, Acquisition and Development [Member] | Special Mention [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans receivable, gross	2,470,000
Land, Acquisition and Development [Member] | Substandard [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans receivable, gross	185,640,000
Land, Acquisition and Development [Member] | Doubtful [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans receivable, gross	0
Land, Acquisition and Development [Member] | Performing Financing Receivable [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans receivable, gross	179,801,000
Grade as Percentage of Total Gross Loans	77.90%
Land, Consumer Lot Loans [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans receivable, gross	169,714,000	186,840,000
Nonaccrual loans by portfolio segment	6,148,000	7,540,000
Land, Consumer Lot Loans [Member] | Nonperforming Financing Receivable [Member]
Financing Receivable, Recorded Investment [Line Items]
Nonaccrual loans by portfolio segment	6,148,000
Percentage of Total Gross Loans	3.60%
Land, Consumer Lot Loans [Member] | Pass [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans receivable, gross	169,590,000
Land, Consumer Lot Loans [Member] | Special Mention [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans receivable, gross	0
Land, Consumer Lot Loans [Member] | Substandard [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans receivable, gross	124,000
Land, Consumer Lot Loans [Member] | Doubtful [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans receivable, gross	0
Land, Consumer Lot Loans [Member] | Performing Financing Receivable [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans receivable, gross	163,566,000
Grade as Percentage of Total Gross Loans	96.40%
Multi Family Housing [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans receivable, gross	717,107,000	697,351,000
Nonaccrual loans by portfolio segment	7,850,000	4,931,000
Multi Family Housing [Member] | Nonperforming Financing Receivable [Member]
Financing Receivable, Recorded Investment [Line Items]
Nonaccrual loans by portfolio segment	7,850,000
Percentage of Total Gross Loans	1.10%
Multi Family Housing [Member] | Pass [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans receivable, gross	680,729,000
Multi Family Housing [Member] | Special Mention [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans receivable, gross	3,756,000
Multi Family Housing [Member] | Substandard [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans receivable, gross	32,622,000
Multi Family Housing [Member] | Doubtful [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans receivable, gross	0
Multi Family Housing [Member] | Performing Financing Receivable [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans receivable, gross	709,257,000
Grade as Percentage of Total Gross Loans	98.90%
Commercial Real Estate Portfolio Segment [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans receivable, gross	303,023,000	315,915,000
Nonaccrual loans by portfolio segment	12,186,000	10,831,000
Commercial Real Estate Portfolio Segment [Member] | Nonperforming Financing Receivable [Member]
Financing Receivable, Recorded Investment [Line Items]
Nonaccrual loans by portfolio segment	12,186,000
Percentage of Total Gross Loans	4.00%
Commercial Real Estate Portfolio Segment [Member] | Pass [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans receivable, gross	263,993,000
Commercial Real Estate Portfolio Segment [Member] | Special Mention [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans receivable, gross	4,345,000
Commercial Real Estate Portfolio Segment [Member] | Substandard [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans receivable, gross	34,685,000
Commercial Real Estate Portfolio Segment [Member] | Doubtful [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans receivable, gross	0
Commercial Real Estate Portfolio Segment [Member] | Performing Financing Receivable [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans receivable, gross	290,837,000
Grade as Percentage of Total Gross Loans	96.00%
Commercial and Industrial Loans [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans receivable, gross	82,091,000	83,070,000
Nonaccrual loans by portfolio segment	257,000	371,000
Commercial and Industrial Loans [Member] | Nonperforming Financing Receivable [Member]
Financing Receivable, Recorded Investment [Line Items]
Nonaccrual loans by portfolio segment	257,000
Percentage of Total Gross Loans	0.30%
Commercial and Industrial Loans [Member] | Pass [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans receivable, gross	75,834,000
Commercial and Industrial Loans [Member] | Special Mention [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans receivable, gross	1,316,000
Commercial and Industrial Loans [Member] | Substandard [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans receivable, gross	4,941,000
Commercial and Industrial Loans [Member] | Doubtful [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans receivable, gross	0
Commercial and Industrial Loans [Member] | Performing Financing Receivable [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans receivable, gross	81,834,000
Grade as Percentage of Total Gross Loans	99.70%
Home Equity Line of Credit [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans receivable, gross	114,676,000	116,143,000
Nonaccrual loans by portfolio segment	590,000	929,000
Home Equity Line of Credit [Member] | Nonperforming Financing Receivable [Member]
Financing Receivable, Recorded Investment [Line Items]
Nonaccrual loans by portfolio segment	590,000
Percentage of Total Gross Loans	0.50%
Home Equity Line of Credit [Member] | Pass [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans receivable, gross	114,676,000
Home Equity Line of Credit [Member] | Special Mention [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans receivable, gross	0
Home Equity Line of Credit [Member] | Substandard [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans receivable, gross	0
Home Equity Line of Credit [Member] | Doubtful [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans receivable, gross	0
Home Equity Line of Credit [Member] | Performing Financing Receivable [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans receivable, gross	114,086,000
Grade as Percentage of Total Gross Loans	99.50%
Consumer Portfolio Segment [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans receivable, gross	73,061,000	92,624,000
Nonaccrual loans by portfolio segment	284,000	977,000
Consumer Portfolio Segment [Member] | Nonperforming Financing Receivable [Member]
Financing Receivable, Recorded Investment [Line Items]
Nonaccrual loans by portfolio segment	284,000
Percentage of Total Gross Loans	0.40%
Consumer Portfolio Segment [Member] | Pass [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans receivable, gross	72,264,000
Consumer Portfolio Segment [Member] | Special Mention [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans receivable, gross	511,000
Consumer Portfolio Segment [Member] | Substandard [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans receivable, gross	286,000
Consumer Portfolio Segment [Member] | Doubtful [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans receivable, gross	0
Consumer Portfolio Segment [Member] | Performing Financing Receivable [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans receivable, gross	72,777,000
Grade as Percentage of Total Gross Loans	99.60%
Pass [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans receivable, gross	7,872,503,000
Grade as Percentage of Total Gross Loans	93.90%
Special Mention [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans receivable, gross	17,882,000
Grade as Percentage of Total Gross Loans	0.20%
Substandard [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans receivable, gross	496,118,000
Grade as Percentage of Total Gross Loans	5.90%
Doubtful [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans receivable, gross	0
Grade as Percentage of Total Gross Loans	0.00%
Performing Financing Receivable [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans receivable, gross	8,153,751,000
Grade as Percentage of Total Gross Loans	97.20%
Nonperforming Financing Receivable [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans receivable, gross	394,679,000		473,121,000
Grade as Percentage of Total Gross Loans	2.96%		3.45%
Nonaccrual loans by portfolio segment	$ 232,752,000
Percentage of Total Gross Loans	2.80%

X

- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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X

- Definition

Reflects the aggregate gross carrying amount of all categories of loans and leases held in portfolio, prior to deducting deferred income and the allowance for losses on loans and leases.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher AICPA
-Name Statement of Position (SOP)
-Number 01-6
-Paragraph 13
-Subparagraph e
-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 310
-SubTopic 10
-Section 45
-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=6375948&loc=d3e4428-111522

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X

- Definition

Reflects the carrying amount of loans deemed to be questionable as to collection on which no interest is continuing to be recognized.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher AICPA
-Name Statement of Position (SOP)
-Number 01-6
-Paragraph 13
-Subparagraph g
-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 310
-SubTopic 10
-Section 50
-Paragraph 7
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=6965416&loc=d3e5111-111524

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- Definition

Reflects the percentage derived from dividing impaired loans on which interest has ceased to be accrued by total loans.

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Grade as Percentage of Total Gross Loans

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