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Loans Receivable (excluding Covered Loans) (Loans on Non-accrual Status) (Details) (USD $) In Thousands, unless otherwise specified	Mar. 31, 2012	Sep. 30, 2011	Mar. 31, 2011
Accounts, Notes, Loans and Financing Receivable [Line Items]
Nonaccrual loans by portfolio segment	$ 166,153	$ 210,465	$ 221,736
Ratio of nonaccrual loan by portfolio segment to total loans on nonaccrual status	100.00%	100.00%
Residential Portfolio Segment [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Nonaccrual loans by portfolio segment	116,284	126,624
Ratio of nonaccrual loan by portfolio segment to total loans on nonaccrual status	70.00%	60.30%
Construction, Speculative [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Nonaccrual loans by portfolio segment	8,190	15,383
Ratio of nonaccrual loan by portfolio segment to total loans on nonaccrual status	4.90%	7.30%
Construction, Custom [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Nonaccrual loans by portfolio segment	539	635
Ratio of nonaccrual loan by portfolio segment to total loans on nonaccrual status	0.30%	0.30%
Land, Acquisition and Development [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Nonaccrual loans by portfolio segment	25,036	37,339
Ratio of nonaccrual loan by portfolio segment to total loans on nonaccrual status	15.10%	17.70%
Land, Consumer Lot Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Nonaccrual loans by portfolio segment	5,641	8,843
Ratio of nonaccrual loan by portfolio segment to total loans on nonaccrual status	3.40%	4.20%
Multi Family Housing [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Nonaccrual loans by portfolio segment	4,530	7,664
Ratio of nonaccrual loan by portfolio segment to total loans on nonaccrual status	2.70%	3.60%
Commercial Real Estate Portfolio Segment [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Nonaccrual loans by portfolio segment	4,997	11,380
Ratio of nonaccrual loan by portfolio segment to total loans on nonaccrual status	3.00%	5.40%
Commercial and Industrial Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Nonaccrual loans by portfolio segment	1	1,679
Ratio of nonaccrual loan by portfolio segment to total loans on nonaccrual status	0.00%	0.80%
Home Equity Line of Credit [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Nonaccrual loans by portfolio segment	591	481
Ratio of nonaccrual loan by portfolio segment to total loans on nonaccrual status	0.40%	0.20%
Consumer Portfolio Segment [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Nonaccrual loans by portfolio segment	$ 344	$ 437
Ratio of nonaccrual loan by portfolio segment to total loans on nonaccrual status	0.20%	0.20%

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- 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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Loans and Leases Receivable, Ratio of Type of Nonperforming Loans to All Nonperforming Loans

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