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Allowance for Losses on Loans (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended			9 Months Ended			12 Months Ended
	Jun. 30, 2013		Jun. 30, 2012	Jun. 30, 2013		Jun. 30, 2012	Sep. 30, 2012
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Beginning Allowance	$ 122,884			$ 133,147		$ 157,160	$ 157,160
Charge-offs	(8,268)						(84,579)
Recoveries	3,488						14,857
Provisions & Transfers	0						45,709
Ending Allowance	118,104			118,104			133,147
Provision for loan losses	0		10,367	3,600		39,576
Loans receivable, gross	7,768,417			7,768,417			7,866,336
Nonaccrual loans by portfolio segment	148,655		171,033	148,655		171,033	173,427
Percentage increase (decrease) in nonperforming assets	(13.10%)			(13.10%)
Allowance for credit losses, charge-offs, net of recoveries	4,780		16,235
Single-Family Residential [Member]
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Beginning Allowance	77,422					83,307	83,307
Charge-offs	(5,969)						(53,789)
Recoveries	2,081						8,164
Provisions & Transfers	(6,148)						44,133
Ending Allowance	67,386			67,386			81,815
Loans receivable, gross	5,269,293			5,269,293			5,779,264
Nonaccrual loans by portfolio segment	104,252			104,252			131,193
Construction - Speculative [Member]
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Beginning Allowance	7,757					13,828	13,828
Charge-offs	(124)						(4,916)
Recoveries	109						711
Provisions & Transfers	(9)						2,437
Ending Allowance	7,733			7,733			12,060
Loans receivable, gross	116,363			116,363			131,526
Nonaccrual loans by portfolio segment	3,776			3,776			10,634
Construction - Custom [Member]
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Beginning Allowance	262					623	623
Charge-offs	(481)						0
Recoveries	0						0
Provisions & Transfers	498						(276)
Ending Allowance	279			279			347
Loans receivable, gross	237,952			237,952			211,690
Nonaccrual loans by portfolio segment	0			0			539
Land - Acquisition & Development [Member]
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Beginning Allowance	12,221					32,719	32,719
Charge-offs	(864)						(16,978)
Recoveries	489						1,341
Provisions & Transfers	(462)						(1,484)
Ending Allowance	11,384			11,384			15,598
Loans receivable, gross	91,452			91,452			128,379
Nonaccrual loans by portfolio segment	9,586			9,586			13,477
Land - Consumer Lot Loans [Member]
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Beginning Allowance	3,941					5,520	5,520
Charge-offs	(212)						(2,670)
Recoveries	1						0
Provisions & Transfers	245						2,087
Ending Allowance	3,975			3,975			4,937
Loans receivable, gross	132,360			132,360			141,844
Nonaccrual loans by portfolio segment	3,712			3,712			5,149
Multi-Family [Member]
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Beginning Allowance	4,272					7,623	7,623
Charge-offs	0						(1,393)
Recoveries	156						504
Provisions & Transfers	(1,070)						(1,454)
Ending Allowance	3,358			3,358			5,280
Loans receivable, gross	749,253			749,253			710,741
Nonaccrual loans by portfolio segment	6,653			6,653			4,185
Commercial Real Estate [Member]
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Beginning Allowance	4,156					4,331	4,331
Charge-offs	0						(814)
Recoveries	3						225
Provisions & Transfers	1,132						(1,786)
Ending Allowance	5,291			5,291			1,956
Loans receivable, gross	639,373			639,373			406,364
Nonaccrual loans by portfolio segment	14,348			14,348			7,653
Commercial & Industrial [Member]
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Beginning Allowance	8,628					5,099	5,099
Charge-offs	(23)						(249)
Recoveries	18						2,366
Provisions & Transfers	5,231						410
Ending Allowance	13,854			13,854			7,626
Loans receivable, gross	336,843			336,843			166,115
Nonaccrual loans by portfolio segment	5,072			5,072			16
HELOC [Member]
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Beginning Allowance	1,031					1,139	1,139
Charge-offs	(24)						(232)
Recoveries	0						66
Provisions & Transfers	(13)						(8)
Ending Allowance	994			994			965
Loans receivable, gross	134,899			134,899			126,942
Nonaccrual loans by portfolio segment	871			871			198
Consumer [Member]
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Beginning Allowance	3,194					2,971	2,971
Charge-offs	(571)						(3,538)
Recoveries	631						1,480
Provisions & Transfers	596						1,650
Ending Allowance	3,850			3,850			2,563
Loans receivable, gross	60,629			60,629			63,471
Nonaccrual loans by portfolio segment	385			385			383
Loans Collectively Evaluated for Impairment [Member]
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Ending Allowance	111,617		116,164	111,617		116,164	117,164
Loans receivable, gross	7,190,884	[1]		7,190,884	[1]		7,520,864	[1]
Allowance as a percentage of outstanding loans and leases	1.60%			1.60%			1.60%
Loans Collectively Evaluated for Impairment [Member] | Single-Family Residential [Member]
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Ending Allowance	67,386			67,386			81,737
Loans receivable, gross	5,159,449	[1]		5,159,449	[1]		5,694,337	[1]
Allowance as a percentage of outstanding loans and leases	1.30%			1.30%			1.40%
Loans Collectively Evaluated for Impairment [Member] | Construction - Speculative [Member]
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Ending Allowance	6,093			6,093			9,079
Loans receivable, gross	96,589	[1]		96,589	[1]		104,312	[1]
Allowance as a percentage of outstanding loans and leases	6.30%			6.30%			8.70%
Loans Collectively Evaluated for Impairment [Member] | Construction - Custom [Member]
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Ending Allowance	279			279			347
Loans receivable, gross	237,832	[1]		237,832	[1]		211,690	[1]
Allowance as a percentage of outstanding loans and leases	0.10%			0.10%			0.20%
Loans Collectively Evaluated for Impairment [Member] | Land - Acquisition & Development [Member]
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Ending Allowance	7,444			7,444			6,697
Loans receivable, gross	66,516	[1]		66,516	[1]		47,294	[1]
Allowance as a percentage of outstanding loans and leases	11.20%			11.20%			14.20%
Loans Collectively Evaluated for Impairment [Member] | Land - Consumer Lot Loans [Member]
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Ending Allowance	3,664			3,664			4,176
Loans receivable, gross	112,060	[1]		112,060	[1]		138,666	[1]
Allowance as a percentage of outstanding loans and leases	3.30%			3.30%			3.00%
Loans Collectively Evaluated for Impairment [Member] | Multi-Family [Member]
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Ending Allowance	3,018			3,018			2,818
Loans receivable, gross	733,836	[1]		733,836	[1]		694,140	[1]
Allowance as a percentage of outstanding loans and leases	0.40%			0.40%			0.40%
Loans Collectively Evaluated for Impairment [Member] | Commercial Real Estate [Member]
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Ending Allowance	5,035			5,035			1,158
Loans receivable, gross	383,358	[1]		383,358	[1]		292,550	[1]
Allowance as a percentage of outstanding loans and leases	1.30%			1.30%			0.40%
Loans Collectively Evaluated for Impairment [Member] | Commercial & Industrial [Member]
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Ending Allowance	13,854			13,854			7,624
Loans receivable, gross	239,407	[1]		239,407	[1]		161,689	[1]
Allowance as a percentage of outstanding loans and leases	5.80%			5.80%			4.70%
Loans Collectively Evaluated for Impairment [Member] | HELOC [Member]
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Ending Allowance	994			994			965
Loans receivable, gross	110,322	[1]		110,322	[1]		112,812	[1]
Allowance as a percentage of outstanding loans and leases	0.90%			0.90%			0.90%
Loans Collectively Evaluated for Impairment [Member] | Consumer [Member]
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Ending Allowance	3,850			3,850			2,563
Loans receivable, gross	51,515	[1]		51,515	[1]		63,374	[1]
Allowance as a percentage of outstanding loans and leases	7.50%			7.50%			4.00%
Loans Individually Evaluated for Impairment [Member]
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Ending Allowance	6,487		21,787	6,487		21,787	15,983
Loans receivable, gross	173,430	[1]		173,430	[1]		234,354	[1]
Allowance as a percentage of outstanding loans and leases	3.70%			3.70%			6.80%
Loans Individually Evaluated for Impairment [Member] | Single-Family Residential [Member]
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Ending Allowance	0			0			78
Loans receivable, gross	94,155	[1]		94,155	[1]		84,584	[1]
Allowance as a percentage of outstanding loans and leases	0.00%			0.00%			0.10%
Loans Individually Evaluated for Impairment [Member] | Construction - Speculative [Member]
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Ending Allowance	1,640			1,640			2,981
Loans receivable, gross	19,774	[1]		19,774	[1]		25,325	[1]
Allowance as a percentage of outstanding loans and leases	8.30%			8.30%			11.80%
Loans Individually Evaluated for Impairment [Member] | Construction - Custom [Member]
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Ending Allowance	0			0			0
Loans receivable, gross	120	[1]		120	[1]		0	[1]
Allowance as a percentage of outstanding loans and leases	0.00%			0.00%			0.00%
Loans Individually Evaluated for Impairment [Member] | Land - Acquisition & Development [Member]
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Ending Allowance	3,940			3,940			8,901
Loans receivable, gross	18,732	[1]		18,732	[1]		77,383	[1]
Allowance as a percentage of outstanding loans and leases	21.00%			21.00%			11.50%
Loans Individually Evaluated for Impairment [Member] | Land - Consumer Lot Loans [Member]
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Ending Allowance	311			311			761
Loans receivable, gross	16,685	[1]		16,685	[1]		3,178	[1]
Allowance as a percentage of outstanding loans and leases	1.90%			1.90%			23.90%
Loans Individually Evaluated for Impairment [Member] | Multi-Family [Member]
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Ending Allowance	340			340			2,462
Loans receivable, gross	8,034	[1]		8,034	[1]		16,000	[1]
Allowance as a percentage of outstanding loans and leases	4.20%			4.20%			15.40%
Loans Individually Evaluated for Impairment [Member] | Commercial Real Estate [Member]
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Ending Allowance	256			256			798
Loans receivable, gross	14,772	[1]		14,772	[1]		26,660	[1]
Allowance as a percentage of outstanding loans and leases	1.70%			1.70%			3.00%
Loans Individually Evaluated for Impairment [Member] | Commercial & Industrial [Member]
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Ending Allowance	0			0			2
Loans receivable, gross	62	[1]		62	[1]		1,134	[1]
Allowance as a percentage of outstanding loans and leases	0.00%			0.00%			0.20%
Loans Individually Evaluated for Impairment [Member] | HELOC [Member]
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Ending Allowance	0			0			0
Loans receivable, gross	1,096	[1]		1,096	[1]		90	[1]
Allowance as a percentage of outstanding loans and leases	0.00%			0.00%			0.00%
Loans Individually Evaluated for Impairment [Member] | Consumer [Member]
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Ending Allowance	0			0			0
Loans receivable, gross	0	[1]		0	[1]		0	[1]
Allowance as a percentage of outstanding loans and leases	0.00%			0.00%			0.00%
Nonperforming Financing Receivable [Member]
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Loans receivable, gross	233,403		278,490	233,403		278,490
Grade as percentage of total gross loans	1.79%		2.07%	1.79%		2.07%
Nonaccrual loans by portfolio segment	148,655			148,655			173,427
Nonperforming Financing Receivable [Member] | Single-Family Residential [Member]
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Nonaccrual loans by portfolio segment	104,252			104,252			131,193
Nonperforming Financing Receivable [Member] | Construction - Speculative [Member]
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Nonaccrual loans by portfolio segment	3,776			3,776			10,634
Nonperforming Financing Receivable [Member] | Construction - Custom [Member]
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Nonaccrual loans by portfolio segment	0			0			539
Nonperforming Financing Receivable [Member] | Land - Acquisition & Development [Member]
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Nonaccrual loans by portfolio segment	9,586			9,586			13,477
Nonperforming Financing Receivable [Member] | Land - Consumer Lot Loans [Member]
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Nonaccrual loans by portfolio segment	3,712			3,712			5,149
Nonperforming Financing Receivable [Member] | Multi-Family [Member]
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Nonaccrual loans by portfolio segment	6,653			6,653			4,185
Nonperforming Financing Receivable [Member] | Commercial Real Estate [Member]
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Nonaccrual loans by portfolio segment	14,348			14,348			7,653
Nonperforming Financing Receivable [Member] | Commercial & Industrial [Member]
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Nonaccrual loans by portfolio segment	5,072			5,072			16
Nonperforming Financing Receivable [Member] | HELOC [Member]
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Nonaccrual loans by portfolio segment	871			871			198
Nonperforming Financing Receivable [Member] | Consumer [Member]
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Nonaccrual loans by portfolio segment	$ 385			$ 385			$ 383
[1] Excludes acquired and covered loans

X

- Definition

A valuation allowance for financing receivables that are expected to be uncollectible.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 310

-SubTopic 10

-Section 50

-Paragraph 11B

-Subparagraph (c)(1)

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- Definition

Amount of recovery of financing receivables doubtful of collection that were previously charged off.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 310

-SubTopic 10

-Section 50

-Paragraph 11B

-Subparagraph (c)(4)

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- Definition

Amount of direct write-downs of financing receivables charged against the allowance.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 310

-SubTopic 10

-Section 50

-Paragraph 11B

-Subparagraph (c)(3)

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- Definition

Amount before allowance of loans and leases held in portfolio, including but not limited to, commercial and consumer loans. Includes deferred interest and fees, undisbursed portion of loan balance, unamortized costs and premiums and discounts from face amounts. Excludes loans and leases covered under loss sharing agreements.

+ References

Reference 1: 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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-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.

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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 FASB

-Name Accounting Standards Codification

-Topic 310

-SubTopic 10

-Section 50

-Paragraph 7

-Subparagraph (a)

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-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.

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- Definition

Provision charged for the period based on estimated losses to be realized from loan and lease transactions.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 230

-SubTopic 10

-Section 45

-Paragraph 28

-Subparagraph (a)

-URI http://asc.fasb.org/extlink&oid=6943989&loc=d3e3602-108585



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-Name Accounting Standards Codification

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-SubTopic 225

-Section S99

-Paragraph 1

-Subparagraph (SX 210.9-04.11)

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-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 04

-Paragraph 11

-Article 9



Reference 4: http://www.xbrl.org/2003/role/presentationRef

-Publisher AICPA

-Name Audit and Accounting Guide (AAG)

-Number AAG-DEP

-Paragraph 168, 169, 170

-IssueDate 2006-05-01

-Chapter 5

-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.

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Allowance as a Percentage of Outstanding Loans and Leases

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- Definition

Reduction to the allowance for credit losses related to financing receivables deemed uncollectible, net of recoveries

+ References

No definition available.

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Financing Receivable, Allowance for Credit Losses, Provision and Transfers

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- Definition

Grade as Percentage of Total Gross Loans

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Percentage Increase (Decrease) in Nonperforming Assets

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