Washington Federal (WAFD) 10-K 26 Nov 13 2013 FY Annual report Financial data

Document_and_Entity_Informatio

Document and Entity Information (USD $)	12 Months Ended
	Sep. 30, 2013	Nov. 26, 2013	Mar. 31, 2013
Document and Entity Information [Abstract]	'	'	'
Document Type	'10-K	'	'
Amendment Flag	'false	'	'
Document Period End Date	30-Sep-13	'	'
Document Fiscal Year Focus	'2013	'	'
Document Fiscal Period Focus	'FY	'	'
Trading Symbol	'WAFD	'	'
Entity Registrant Name	'WASHINGTON FEDERAL INC	'	'
Entity Central Index Key	'0000936528	'	'
Current Fiscal Year End Date	'--09-30	'	'
Entity Filer Category	'Large Accelerated Filer	'	'
Entity Common Stock, Shares Outstanding	'	101,784,671	'
Entity Well-known Seasoned Issuer	'Yes	'	'
Entity Voluntary Filers	'No	'	'
Entity Current Reporting Status	'Yes	'	'
Entity Public Float	'	'	$1,819,289,605

Consolidated_Statements_of_Fin

Consolidated Statements of Financial Condition (USD $)	Sep. 30, 2013	Sep. 30, 2012
In Thousands, unless otherwise specified
ASSETS	'	'
Cash and cash equivalents	$203,563	$751,430
Available-for-sale securities	2,360,948	1,781,705
Held-to-maturity securities	1,654,666	1,191,487
Loans receivable, net	7,528,030	7,451,998
Covered loans, net	295,947	288,376
Interest receivable	49,218	46,857
Premises and equipment, net	206,172	178,845
Real estate held for sale	72,925	80,800
Real estate held for investment	9,392	18,678
Covered real estate held for sale	30,980	29,549
FDIC indemnification asset	64,615	87,571
FHLB & FRB stock	173,009	149,840
Intangible assets, including goodwill of $260,277 and $251,653	264,318	256,076
Federal and state income taxes, net	44,000	22,513
Other assets	125,076	137,219
Total assets	13,082,859	12,472,944
Customer accounts	'	'
Time deposit accounts	3,540,842	2,946,453
Time deposit accounts	5,549,429	5,630,165
Customer accounts	9,090,271	8,576,618
FHLB advances	1,930,000	1,880,000
Advance payments by borrowers for taxes and insurance	42,443	40,041
Accrued expenses and other liabilities	82,510	76,533
Total liabilities	11,145,224	10,573,192
Stockholders’ equity	'	'
Common stock, $1.00 par value, 300,000,000 shares authorized; 132,572,475 and 129,950,223 shares issued; 102,484,671 and 106,177,615 shares outstanding	132,573	129,950
Paid-in capital	1,625,051	1,586,295
Accumulated other comprehensive income, net of taxes	6,378	13,306
Treasury stock, at cost; 30,087,804 and 23,772,608 shares	-420,817	-310,579
Retained earnings	594,450	480,780
Total stockholders’ equity	1,937,635	1,899,752
Total liabilities and stockholders’ equity	$13,082,859	$12,472,944

Consolidated_Statements_of_Fin1

Consolidated Statements of Financial Condition (Parentheticals) (USD $)	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2011
In Thousands, except Share data, unless otherwise specified
Statement of Financial Position [Abstract]	'	'	'
Intangible assets, goodwill	$260,277	$251,653	$251,653
Common stock, par value (in dollars per share)	$1	$1	'
Common stock, shares authorized (in shares)	300,000,000	300,000,000	'
Common stock, shares issued (in shares)	132,572,475	129,950,223	'
Common stock, shares outstanding (in shares)	102,484,671	106,177,615	'
Treasury stock, shares (in shares)	30,087,804	23,772,608	'

Consolidated_Statements_of_Ope

Consolidated Statements of Operations (USD $)	12 Months Ended
In Thousands, except Share data, unless otherwise specified	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2011
INTEREST INCOME	'	'	'
Loans	$454,915	$484,833	$522,230
Mortgage-backed securities	48,520	96,142	108,207
Investment securities and cash equivalents	12,856	9,296	14,198
Interest income	516,291	590,271	644,635
INTEREST EXPENSE	'	'	'
Customer accounts	67,903	86,939	115,835
FHLB advances and other borrowings	68,256	106,310	111,861
Interest expense	136,159	193,249	227,696
Net interest income	380,132	397,022	416,939
Provision for loan losses	1,350	44,955	93,104
Net interest income after provision for loan losses	378,782	352,067	323,835
OTHER INCOME	'	'	'
Prepayment penalty on long-term debt	0	-95,565	0
Gain on sale of investments	0	95,234	8,147
Other	21,933	16,848	17,786
Other income	21,933	16,517	25,933
OTHER EXPENSE	'	'	'
Compensation and benefits	90,815	77,628	72,034
Amortization of intangibles	1,786	1,509	1,447
Occupancy	18,232	15,971	14,480
FDIC insurance premiums	12,215	16,093	20,582
Other	45,037	34,631	29,496
Deferred loan origination costs	-3,845	-2,978	-1,980
Other expense	164,240	142,854	136,059
Loss on real estate acquired through foreclosure, net	-1,859	-9,819	-40,050
Income before income taxes	234,616	215,911	173,659
Income taxes	'	'	'
Current	71,969	61,138	88,373
Deferred	11,142	16,590	-25,855
Income taxes	83,111	77,728	62,518
NET INCOME	$151,505	$138,183	$111,141
PER SHARE DATA	'	'	'
Basic earnings (in dollars per share)	$1.45	$1.29	$1
Diluted earnings (in dollars per share)	$1.45	$1.29	$1
Cash dividends per share (in dollars per share)	$0.36	$0.32	$0.24
Basic weighted average number of shares outstanding (in shares)	104,684,812	107,108,703	111,383,877
Diluted weighted average number of shares outstanding, including dilutive stock options (in shares)	104,837,470	107,149,240	111,460,106

Consolidated_Statements_of_Com

Consolidated Statements of Comprehensive Income (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2011
Statement of Comprehensive Income [Abstract]	'	'	'
Net income	$151,505	$138,183	$111,141
Other comprehensive income (loss) net of tax:	'	'	'
Net unrealized gains (losses) on available-for-sale securities	-10,953	-209,832	48,939
Related tax benefit (expense)	4,025	77,113	-17,985
Reclassification adjustment of net gains from sale of available-for-sale securities included in net income	0	95,234	8,147
Related tax benefit (expense)	0	-34,998	-2,994
Other comprehensive income (loss)	-6,928	-72,483	36,107
Comprehensive income	$144,577	$65,700	$147,248

Consolidated_Statements_of_Sto

Consolidated Statements of Stockholders' Equity (USD $)	Total	Common Stock	Paid-in Capital	Retained Earnings	Accumulated Other Comprehensive Income (loss)	Treasury Stock
In Thousands, unless otherwise specified
Balance, Beginning of period at Sep. 30, 2010	$1,841,147	$129,556	$1,578,527	$292,367	$49,682	($208,985)
Increase (Decrease) in Stockholders' Equity [Roll Forward]	'	'	'	'	'	'
Net income	111,141	'	'	111,141	'	'
Other comprehensive income adjustment	36,107	'	'	'	36,107	'
Dividends paid on common stock	-26,796	'	'	-26,796	'	'
Compensation expense related to common stock options	1,087	'	1,087	'	'	'
Proceeds from exercise of common stock options	1,631	104	1,527	'	'	'
Tax benefit related to exercise of stock options	55	'	55	'	'	'
Restricted stock	1,841	194	1,647	'	'	'
Treasury stock	-59,680	'	'	'	'	-59,680
Balance, End of period at Sep. 30, 2011	1,906,533	129,854	1,582,843	376,712	85,789	-268,665
Increase (Decrease) in Stockholders' Equity [Roll Forward]	'	'	'	'	'	'
Net income	138,183	'	'	138,183	'	'
Other comprehensive income adjustment	-72,483	'	'	'	-72,483	'
Dividends paid on common stock	-34,115	'	'	-34,115	'	'
Compensation expense related to common stock options	848	'	848	'	'	'
Proceeds from exercise of common stock options	357	29	328	'	'	'
Tax benefit related to exercise of stock options	0	'	0	'	'	'
Restricted stock	2,343	67	2,276	'	'	'
Treasury stock	-41,914	'	'	'	'	-41,914
Balance, End of period at Sep. 30, 2012	1,899,752	129,950	1,586,295	480,780	13,306	-310,579
Increase (Decrease) in Stockholders' Equity [Roll Forward]	'	'	'	'	'	'
Net income	151,505	'	'	151,505	'	'
Other comprehensive income adjustment	-6,928	'	'	'	-6,928	'
Dividends paid on common stock	-37,835	'	'	-37,835	'	'
Compensation expense related to common stock options	473	'	473	'	'	'
Proceeds from exercise of common stock options	4,260	208	4,052	'	'	'
Proceeds from issuance of common stock	33,493	1,997	31,496	'	'	'
Tax benefit related to exercise of stock options	1	'	1	'	'	'
Restricted stock	3,152	418	2,734	'	'	'
Treasury stock	-110,238	'	'	'	'	-110,238
Balance, End of period at Sep. 30, 2013	$1,937,635	$132,573	$1,625,051	$594,450	$6,378	($420,817)

Consolidated_Statements_of_Cas

Consolidated Statements of Cash Flows (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2011
CASH FLOWS FROM OPERATING ACTIVITIES	'	'	'
Net income	$151,505	$138,183	$111,141
Adjustments to reconcile net income to net cash provided by operating activities:	'	'	'
Amortization (accretion) of fees, discounts, premiums and intangible assets, net	7,067	31,046	20,663
Depreciation	8,707	3,456	32,828
Cash received from FDIC under loss share	13,421	7,587	6,667
Stock option compensation expense	473	848	1,087
Provision for loan losses	1,350	44,955	93,104
(Gain) loss on investment securities and real estate held for sale, net	-8,011	-100,952	23,315
Loss on extinguishment of debt	0	95,565	0
Decrease (increase) in accrued interest receivable	-330	5,726	-3,312
Increase in FDIC loss share receivable	-1,482	-3,284	-10,470
(Increase) decrease in income taxes receivable	-17,462	18,066	-11,351
Decrease (increase) in other assets	36,350	-74,889	21,600
Increase (decrease) in accrued expenses and other liabilities	-10,166	8,649	-23,575
Net cash provided by operating activities	181,422	174,956	261,697
CASH FLOWS FROM INVESTING ACTIVITIES	'	'	'
Net principal collections (loan originations)	343,771	544,240	400,054
FRB stock purchase	-23,981	0	0
FHLB stock redeemed	5,894	1,830	0
Available-for-sale securities purchased	-889,595	-2,442,184	-1,585,945
Principal payments and maturities of available-for-sale securities	275,726	1,608,603	727,379
Available-for-sale securities sold	43,198	2,257,913	131,361
Held-to-maturity securities purchased	-787,449	-1,167,121	0
Principal payments and maturities of held-to-maturity securities	331,022	23,082	33,874
Net cash received from acquisition	202,308	50,576	0
Proceeds from sales of real estate held for sale	115,615	175,832	110,400
Covered REO acquired	20,843	33,579	29,383
Premises and equipment purchased and REO improvements	-29,246	-32,010	-10,539
Net cash (used in) provided by investing activities	-391,894	1,054,340	-164,033
CASH FLOWS FROM FINANCING ACTIVITIES	'	'	'
Net (decrease) in customer accounts	-223,515	-225,068	-186,637
Proceeds from long-term borrowings	50,000	0	200,000
Repayments of long-term borrowings	-22,470	-995,306	-100,000
Proceeds from exercise of common stock options and related tax benefit	4,261	357	1,686
Dividends paid on common stock	-37,835	-32,430	-25,697
Treasury stock purchased, net	-110,238	-41,914	-59,680
Decrease in advance payments by borrowers for taxes and insurance	2,402	493	44
Net cash used in financing activities	-337,395	-1,293,868	-170,284
(Decrease) in cash and cash equivalents	-547,867	-64,572	-72,620
Cash and cash equivalents at beginning of period	751,430	816,002	888,622
Cash and cash equivalents at end of period	203,563	751,430	816,002
Non-cash investing activities	'	'	'
Non-covered real estate acquired through foreclosure	91,352	160,971	112,693
Covered real estate acquired through foreclosure	11,196	15,905	54,638
Cash paid during the period for	'	'	'
Interest	140,409	199,735	228,444
Income taxes	80,417	59,596	73,798
The following summarizes the non-cash activities related to acquisitions	'	'	'
Fair value of assets and intangibles acquired, including goodwill	607,193	124,594	0
Fair value of liabilities assumed	-776,009	-154,493	0
Net fair value of acquired assets (liabilities)	($168,816)	($29,899)	$0

Summary_of_Significant_Account

Summary of Significant Accounting Policies	12 Months Ended
	Sep. 30, 2013
Accounting Policies [Abstract]	'
Summary of Significant Accounting Policies	'
	Summary of Significant Accounting Policies
	SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES
	Principles of consolidation. The consolidated financial statements include the accounts of Washington Federal, Inc. ("Company" or "Washington Federal") and its wholly owned subsidiaries. Intercompany transactions and balances have been eliminated.
	Description of business. Washington Federal is a bank holding company. The Company's principal operating subsidiary is Washington Federal, National Association ("Bank"). The Bank is principally engaged in the business of attracting deposits from the general public and investing these funds, together with borrowings and other funds, in one-to-four family residential real estate loans, multi-family real estate loans and commercial loans. The Bank conducts its activities through a network of 182 offices located in Washington, Oregon, Idaho, Utah, Arizona, Nevada, New Mexico, and Texas.
	The Company's fiscal year end is September 30th. All references to 2013, 2012 and 2011 represent balances as of September 30, 2013, September 30, 2012 and September 30, 2011, or activity for the fiscal years then ended. References to net income in this document refer to net income available to common shareholders.
	Acquisitions. South Valley Bancorp, Inc. Effective November 1, 2012, Washington Federal acquired South Valley Bancorp, Inc. (“South Valley”) and South Valley's wholly owned subsidiary, South Valley Bank & Trust, was merged into the Bank. The acquisition provided $361 million of net loans, $108 million of net covered loans, $736 million of deposit accounts, including $533 million in transaction deposit accounts and 24 branch locations in Central and Southern Oregon. Total consideration paid at closing was $44 million, including $34 million of Washington Federal, Inc. stock and $10 million of cash resulting from the collection of certain earn-out assets. The operating results of the Company include the operating results produced by the acquired assets and assumed liabilities for the period November 1, 2012 to September 30, 2013.
	Western National Bank. Effective December 16, 2011, Washington Federal acquired certain assets and liabilities, including most of the loans and deposits, of Western National Bank, headquartered in Phoenix, Arizona (“WNB”) from the Federal Deposit Insurance Corporation (“FDIC”) in an FDIC-assisted transaction. Under the terms of the Purchase and Assumption Agreement, the Company and the FDIC agreed to a discount of $53 million on net assets and no loss sharing provision or premium on deposits. WNB operated three full-service offices in Arizona. The Company acquired certain assets with a book value of $177 million, including $143 million in loans and $7 million in foreclosed real estate, and selected liabilities with a book value of $153 million, including $136 million in deposits. Pursuant to the purchase and assumption agreement with the FDIC, the Company received a cash payment from the FDIC for $30 million. The operating results of the Company include the operating results produced by the acquired assets and assumed liabilities for the period December 16, 2011 to September 30, 2012.
	Charter Bank. Effective October 14, 2011, the Company acquired six branch locations, four in Albuquerque, New Mexico, and two in Santa Fe, New Mexico, from Charter Bank. $254,821,000 of deposits were acquired for a premium of $1,061,000. The operating results of the Company include the operating results produced by the assumed liabilities for the period October 14, 2011 to September 30, 2013.
	Cash and cash equivalents. Cash and cash equivalents include cash on hand, amounts due from banks, overnight investments and repurchase agreements with an initial maturity of three months or less.
	Investments and mortgage-backed securities. The Company accounts for investments and mortgage-backed securities in two categories: held-to-maturity and available-for-sale.
	Held-to-maturity securities are accounted for at amortized cost, but the Company must have both the positive intent and the ability to hold those securities to maturity. There are very limited circumstances under which securities in the held-to-maturity category can be sold without jeopardizing the cost basis of accounting for the remainder of the securities in this category.
	Available-for-sale securities are not classified as held-to-maturity and are considered to be available-for-sale. Gains and losses realized on the sale of these securities are accounted for based on the specific identification method. Unrealized gains and losses for available-for-sale securities are excluded from earnings and reported as a net amount in the accumulated other comprehensive income component of stockholders' equity.
	Management evaluates debt and equity securities for other than temporary impairment on a quarterly basis based on the securities' current credit quality, interest rates, term to maturity and management's intent and ability to hold the securities until the net book value is recovered. Any other than temporary declines in fair value are recognized in the statements of operations.
	Realized gains and losses on securities sold as well as other than temporary impairment charges, are shown on the Consolidated Statements of Operations under the Other Income (Loss) heading.
	Premiums and discounts on investments are deferred and recognized over the life of the asset, using the effective interest method.
	Loans receivable. Loans that are performing in accordance with their contractual terms are held at their carrying amount and expected interest is accrued. The Company also receives fees for originating loans in addition to various fees and charges related to existing loans, which may include prepayment charges, late charges and assumption fees.
	When a borrower fails to make a required payment on a loan, the Company attempts to cure the deficiency by contacting the borrower. Contact is made after a payment is 30 days past its grace period. In most cases, deficiencies are cured promptly. If the delinquency is not cured within 90 days, the Company may institute appropriate action to foreclose on the property. If foreclosed, the property is sold at a public sale and may be purchased by the Company.
	The Company will consider modifying the interest rates and terms of a loan if it determines that a modification is a better alternative to foreclosure. Most troubled debt restructured ("TDR") loans are accruing and performing loans where the borrower has proactively approached the Company about modifications due to temporary financial difficulties. Each request is individually evaluated for merit and likelihood of success. The concession for these loans is typically a payment reduction through a rate reduction of from 100 to 200 bps for a specific term, usually six to twenty-four months. Interest-only payments may also be approved during the modification period. Principal forgiveness is generally not an available option for restructured loans. Before granting approval to modify a loan in a TDR, we consider a borrower’s ability to repay by evaluating: current income levels and debt to income ratio, borrower’s credit score, payment history of the loan, and updated valuation of the secondary repayment source. The Company also modifies some loans that are not classified as TDRs as the modification is due to a restructuring where the effective interest rate on the debt is reduced to reflect a decrease in market interest rates.
	Loans are placed on nonaccrual status when, in the judgment of management, the probability of collection of interest is deemed to be insufficient to warrant further accrual. When a loan is placed on nonaccrual status, previously accrued but unpaid interest is deducted from interest income. The Company does not accrue interest on loans 90 days or more past due. If payment is made on a loan so that the loan becomes less than 90 days past due, and the Company expects full collection of principal and interest, the loan is returned to full accrual status. Any interest ultimately collected is credited to income in the period of recovery. A loan is charged-off when the loss is estimable and it is confirmed that the borrower will not be able to meet contractual obligations.
	If a consumer loan is on non-accrual status before becoming a TDR it will stay on non-accrual status following restructuring until it has been performing for at least six months, at which point it may be moved to accrual status. If a loan is on accrual status before it becomes a TDR, and we conclude full repayment is highly probable based on our internal evaluation, it will remain on accrual status following restructuring. If the homogeneous restructured loan does not perform it is placed in non-accrual status when it is 90 days delinquent.
	For commercial loans, six consecutive payments on newly restructured loan terms are required prior to returning the loan to accrual status. In some instances after the required six consecutive payments are made a management assessment will conclude that collection of the entire principal balance is still in doubt. In those instances, the loan will remain on non-accrual.
	Impaired loans consist of loans receivable that are not expected to have their principal and interest repaid in accordance with their contractual terms. This includes TDRs that are on non-accrual status. Collateral dependent impaired loans are measured using the fair value of the collateral, less selling costs. Non-collateral dependent loans are measured at the present value of expected future cash flows.
	Deferred fees and discounts on loans. Loan discounts and loan fees are deferred and recognized over the life of the loans using the effective interest method.
	Allowance for Loan Losses. The Company maintains an allowance for loan losses to absorb losses inherent in the loan portfolio. The allowance is based on ongoing, quarterly assessments of the probable and estimable losses inherent in the loan portfolio. The Company's methodology for assessing the appropriateness of the allowance consists of two components, which include the general allowance and specific allowances. The general portion of the loan loss allowance is established by applying a loss percentage factor to the different loan types. The loss percentage factor is made up of two parts - the historical loss factor (“HLF”) and the qualitative loss factor (“QLF”).
	The HLF takes into account historical charge-offs by loan type. The Company uses an average of historical loss rates for each loan category multiplied by a loss emergence period. This is the likely period of time during which a residential or commercial loan borrower experiencing financial difficulties might burn through their cash prior to becoming delinquent on their loan, plus the period of time that it takes the bank to work out the loans.
	The QLF are based on management's continuing evaluation of the pertinent factors underlying the quality of the loan portfolio, including changes in the size and composition of the loan portfolio, actual loan loss experience, current economic conditions, collateral values, geographic concentrations, seasoning of the loan portfolio, specific industry conditions, and the duration of the current business cycle. These factors are considered by loan type.
	Specific allowances are established for loans which are individually evaluated, in cases where management has identified significant conditions or circumstances related to a loan that management believes indicate the probability that a loss has been incurred.
	The recovery of the carrying value of loans is susceptible to future market conditions beyond the Company's control, which may result in losses or recoveries differing from those provided. In those cases, a portion of the allowance is then allocated to reflect the estimated loss exposure.
	Covered assets. Covered loans are the loans acquired from Horizon in 2010 and and certain loans acquired from South Valley in 2013 that are recorded at their estimated fair market value. Loans that were classified as non-performing loans by Horizon and South Valley are no longer classified as non-performing because, at acquisition, the carrying value of these loans was adjusted to reflect fair value and are covered under the FDIC loss sharing agreements. Management believes that the new book value reflects an amount that will ultimately be collected.
	Acquired credit impaired loans are accounted for under Financial Accounting Standards Board ("FASB") Accounting Standards Codification ("ASC") 310-30 when there is evidence of credit deterioration since origination and for which it is probable, at acquisition, that the Company would be unable to collect all contractually required payments. Interest income, through accretion of the difference between the carrying amount of the loans and the expected cash flows, was recognized on all acquired loans.
	Covered real estate held for sale represents the foreclosed properties that were originally Horizon loans or certain South Valley Bank loans. Covered real estate held for sale is carried at the estimated fair market value of the repossessed real estate. The covered loans and covered real estate held for sale are collectively referred to as “covered assets”.
	FDIC indemnification asset. FDIC indemnification asset is the receivable recorded from due to guarantee provided by the FDIC on the covered assets.
	Client Derivatives. Interest rate swap agreements are provided to certain clients who desire to convert their obligations from variable to fixed interest rates. Under these agreements, the Company enters into a variable-rate loan agreement with a customer in addition to a swap agreement, and then enters into a corresponding swap agreement with a third party in order to offset its exposure on the customer swap agreement. As the interest rate swap agreements with the customers and third parties are not designated as hedges under ASC 815, the instruments are marked to market in earnings. The change in fair value of the offsetting swaps are included in interest income and interest expense and there is no impact on net income. There is a modest fee income earned on the swaps that is included in miscellaneous loan income.
	Premises and equipment. Premises and equipment are stated at cost, less accumulated depreciation. Depreciation is computed on the straight-line method over the estimated useful lives of the respective assets. Expenditures are capitalized for betterments and major renewals. Charges for ordinary maintenance and repairs are expensed to operations as incurred.
	Real estate held for sale. Properties acquired in settlement of loans or acquired for development are recorded at the lower of cost or fair value less selling costs. Subsequent declines in valuation are recorded as additional expense in gain (loss) on real estate acquired through foreclosure line item.
	Real estate held for investment. Properties acquired in settlement of loans or acquired for development are recorded at the lower of cost or fair value less selling costs where management has the intent to hold the properties until the housing market recovers. Subsequent declines in valuation are recorded as additional expense in gain (loss) on real estate acquired through foreclosure line item.
	Intangible assets. Goodwill represents the excess of the cost of businesses acquired over the fair value of the net assets acquired. The core deposit intangibles and non-compete agreement intangible are acquired assets that lack physical substance but can be distinguished from goodwill. Goodwill is evaluated for impairment on an annual basis. Other intangible assets are amortized over their estimated lives and are subject to impairment testing when events or circumstances change. If circumstances indicate that the carrying value of the assets may not be recoverable, an impairment charge could be recorded. No impairment of intangible assets has ever been identified. The Company amortizes the core deposit intangibles on a straight line basis over their estimated lives of between 5 and 8 years.
	The balance of the Company's intangible assets was as follows, which includes the additional goodwill discussed above:
		Goodwill			Servicing Rights Intangible			Core Deposit Intangible			Total
		(In thousands)
	Balance at September 30, 2011	$	251,653		$	1,246		$	3,372		$	256,271
	Additions	—			—			2,022			2,022
	Amortization	—			(960		)	(1,257		)	(2,217		)
	Balance at September 30, 2012	251,653			286			4,137			256,076
	Additions	8,624			—			1,433			10,057
	Amortization	—			(286		)	(1,529		)	(1,815		)
	Balance at September 30, 2013	$	260,277		$	—		$	4,041		$	264,318
	The table below presents the estimated core deposit intangible asset amortization expense for the next five years:
	Year End		Expense
			(In thousands)
	2014		$	1,600
	2015		1,301
	2016		682
	2017		386
	2018		72
	Accounting for stock-based compensation. The Company records an expense for the estimated fair value of equity awards over the vesting period. See Note L for additional information. Stock options that were not dilutive but were outstanding as of September 30, 2013, 2012 and 2011 were 435,825, 934,880 and 2,190,123, respectively.
	Use of estimates. The preparation of financial statements in conformity with accounting principles generally accepted in the United States of America requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosure of contingent assets and liabilities at the date of the financial statements and the reported amounts of revenues and expenses during the reporting period. Significant estimates reported in the financial statements include the allowance for loan losses, intangible assets, deferred taxes and contingent liabilities. Actual results could differ from these estimates.
	New accounting pronouncements. In December 2012, FASB issued Accounting Standards Update (“ASU”) 2012-06, Subsequent Accounting for an Indemnification Asset Recognized at the Acquisition Date as a Result of a Government-Assisted Acquisition of a Financial Institution. ASU 2012-06 clarifies that when a reporting entity recognizes an indemnification asset as a result of a government-assisted acquisition of a financial institution and there is a subsequent change in the amount of cash flows expected to be collected on the indemnified asset, the reporting entity should subsequently measure the indemnification asset on the same basis as the underlying loans by taking into account the contractual limitations of the Loss-Sharing Agreement ("LSA"). For amortization of changes in value, the reporting entity should use the term of the LSA if it is shorter than the term of the acquired loans. ASU 2012-06 is effective for interim and annual periods beginning after December 15, 2012. Early adoption is permitted. Based upon the most recent measurement of expected losses covered under loss-sharing agreements, adoption of the new guidance is not expected to have a material impact on the Company's consolidated financial results.
	In January 2013, the FASB issued ASU 2013-01, Balance Sheet (Topic 210): Clarifying the Scope of Disclosures about Offsetting Assets and Liabilities. The main objective of this Update is to address implementation issues about the scope of ASU No. 2011-11, Balance Sheet (Topic 210): Disclosures about Offsetting Assets and Liabilities. The guidance in this ASU is effective for the first interim or annual period beginning on or after January 1, 2013 and should be applied retrospectively. This new guidance did not have a material impact on the Company's consolidated financial statements.
	In February 2013, the FASB issued ASU 2013-02, Comprehensive Income (Topic 220): Reporting of Amounts Reclassified Out
	of Accumulated Other Comprehensive Income. The objective of this Update is to improve the reporting of reclassifications out
	of accumulated other comprehensive income. The amendments do not change the current requirements for reporting net income
	or other comprehensive income in financial statements; rather, they require the entity to provide information about the amounts
reclassified out of accumulated other comprehensive income by component. The guidance in this ASU is effective for fiscal years, and interim periods within those years, beginning after December 15, 2012, and should be applied prospectively. This new guidance did not have a material impact on the Company's consolidated financial statements.
In July 2013, the FASB issued ASU 2013-10, Derivatives and Hedging (Topic 815): Inclusion of the Fed Funds Effective Swap
Rate (or Overnight Index Swap Rate) as a Benchmark Interest Rate for Hedge Accounting Purposes. Topic 815, Derivatives and Hedging, provides guidance on the risks that are permitted to be hedged in a fair value or cash flow hedge. The objective of this Update is to provide for the inclusion of the Fed Funds Effective Swap Rate (OIS) as a U.S. benchmark interest rate for hedge accounting purposes, in addition to UST and LIBOR rates. The guidance in this ASU is effective prospectively for qualifying new or redesignated hedging relationships entered into on or after July 17, 2013. As the Company does not currently engage in derivatives transactions that are accounted for as cash flow or fair value hedges, the adoption of this ASU is not expected to have a material impact on the Company's consolidated financial statements.
In July 2013, the FASB issued ASU 2013-11, Income Taxes (Topic 740): Presentation of an Unrecognized Tax Benefit When a
Net Operating Loss Carryforward, A Similar Tax Loss, or a Tax Credit Carryforward Exists. Topic 740, Income Taxes, does not
include explicit guidance on the financial statement presentation of an unrecognized tax benefit when a net operating loss
carryforward, a similar tax loss, or a tax credit carryforward exists. There is diversity in practice in the presentation of unrecognized tax benefits in those instances. Some entities present unrecognized tax benefits as a liability unless the unrecognized tax benefit is directly associated with a tax position taken in a tax year that results in, or that resulted in, the recognition of a net operating loss or tax credit carryforward for that year and the net operating loss or tax credit carryforward has not been utilized. Other entities present unrecognized tax benefits as a reduction of a deferred tax asset for a net operating loss or tax credit carryforward in certain circumstances. The objective of the amendments in this Update is to eliminate that diversity in practice. The amendments in this Update do not require new recurring disclosures. The guidance in this ASU is effective for fiscal years, and interim periods within those years, beginning after December 15, 2013. The amendments should be applied prospectively to all unrecognized tax benefits that exist at the effective date. Retrospective application is permitted. This new guidance is not expected to have a material impact on the Company's consolidated financial statements.
Business segments. As the Company manages its business and operations on a consolidated basis, management has determined that there is one reportable business segment.
Reclassifications. Reclassification of Real Estate Held for Investment into its own line item and out of Real Estate Held for Sale have been made to the financial statements for years prior to September 30, 2013 to conform to current year classifications.

Investment_Securities

Investment Securities	12 Months Ended
	Sep. 30, 2013
Investments, Debt and Equity Securities [Abstract]	'
Investment Securities	'
	INVESTMENT SECURITIES
	September 30,	2013
		Amortized				Gross Unrealized							Fair				Yield
		Cost				Gains				Losses			Value
		(In thousands)
	Available-for-sale securities
	U.S. government and agency securities due
	1 to 5 years	61,002				3,393				(252		)	64,143				1.98	%
	5 to 10 years	129,219				—				(1,547		)	127,672				0.86	%
	Over 10 years	344,571				—				(2,411		)	342,160				0.93	%
	Equity Securities
	1 to 5 years	500				11				—			511				2.17	%
	5 to 10 years	100,000				726				—			100,726				1.8	%
	Corporate bonds due
	Within 1 year	19,500				3				—			19,503				0.49	%
	1 to 5 years	317,190				1,980				(130		)	319,040				0.75	%
	5 to 10 years	113,060				1,180				(768		)	113,472				1.53	%
	Municipal bonds due
	Over 10 years	20,422				2,123				—			22,545				6.45	%
	Mortgage-backed securities
	Agency pass-through certificates	1,245,400				10,270				(4,494		)	1,251,176				2.18	%
		2,350,864				19,686				(9,602		)	2,360,948				1.7	%
	Held-to-maturity securities
	Mortgage-backed securities
	Agency pass-through certificates	1,654,666				3,387				(75,204		)	1,582,849				3.14	%
		1,654,666				3,387				(75,204		)	1,582,849				3.14	%
		$	4,005,530			$	23,073			$	(84,806	)	$	3,943,797			2.3	%
	September 30,	2012
		Amortized				Gross Unrealized							Fair				Yield
		Cost				Gains				Losses			Value
		(In thousands)
	Available-for-sale securities
	U.S. government and agency securities due
	Within 1 year	$	19,999			$	42			$	(6	)	$	20,035			0.57	%
	1 to 5 years	—				—				—			—				—	%
	5 to 10 years	59,300				4,225				—			63,525				2.21	%
	Over 10 years	100,000				—				—			100,000				1.05	%
	Corporate bonds due
	1 to 5 years	336,340				2,810				(61		)	339,089				0.91	%
	5 to 10 years	62,919				1,324				(7		)	64,236				2.73	%
	Municipal bonds due
	Over 10 years	20,442				4,402				—			24,844				6.45	%
	Mortgage-backed securities
	Agency pass-through certificates	1,161,668				9,358				(1,050		)	1,169,976				2.28	%
		1,760,668				22,161				(1,124		)	1,781,705				1.99	%
	Held-to-maturity securities
	Tax-exempt municipal bonds due
	Within 1 year	795				7							802				5.8	%
	Mortgage-backed securities
	Agency pass-through certificates	1,190,692				25,729				—			1,216,421				3.1	%
		1,191,487				25,736				—			1,217,223				3.1	%
		$	2,952,155			$	47,897			$	(1,124	)	$	2,998,928			2.44	%
	There were $43,198,000 of available-for-sale securities that were sold in 2013, resulting in a gain of $0. These securities were acquired from South Valley and sold on the same day. There were $2,257,913,000 of available-for-sale securities that were sold in 2012, resulting in a net gain of $95,234,000. There were $131,361,000 of available-for-sale securities that were sold in 2011, resulting in a net gain of $8,147,000.
	Substantially all mortgage-backed securities have contractual due dates that exceed twenty-five years.
	The following table shows the unrealized gross losses and fair value of securities at September 30, 2013, by length of time that individual securities in each category have been in a continuous loss position. The Company had $190 million securities in a continuous loss position for 12 or more months at September 30, 2013, which consisted of corporate bonds, U.S. government and agency securities, and mortgage-backed securities. Management believes that the declines in fair value of these investments are not an other than temporary impairment.
	As of September 30,	2013
		Less than 12 months						12 months or more					Total
		Unrealized			Fair			Unrealized			Fair		Unrealized			Fair
		Gross Losses			Value			Gross Losses			Value		Gross Losses			Value
		(In thousands)
	Corporate Bonds	$	(660	)	$	52,434		$	(238	)	$	9,763	$	(898	)	$	62,197
	U.S. agency securities	(4,144		)	309,109			(66		)	14,091		(4,210		)	323,200
	Agency pass-through certificates	(78,291		)	1,703,948			(1,407		)	166,503		(79,698		)	1,870,451
	$	(83,095	)	$	2,065,491		$	(1,711	)	$	190,357	$	(84,806	)	$	2,255,848

Loans_Receivable_excluding_Cov

Loans Receivable (excluding Covered Loans)	12 Months Ended
	Sep. 30, 2013
Receivables [Abstract]	'
Loans Receivable (excluding Covered Loans)	'
	Loans Receivable (excluding Covered Loans)
		September 30, 2013							September 30, 2012
		(In thousands)							(In thousands)
	Non-acquired loans
	Single-family residential	$	5,359,149			67.1	%		$	5,778,922			73.5	%
	Construction - speculative	130,778				1.6			129,637				1.6
	Construction - custom	302,722				3.8			211,690				2.7
	Land - acquisition & development	77,775				1.1			124,677				1.6
	Land - consumer lot loans	121,671				1.5			141,844				1.8
	Multi-family	831,684				10.4			710,140				9
	Commercial real estate	414,961				5.1			319,210				4.1
	Commercial & industrial	243,199				3			162,823				2.1
	HELOC	112,186				1.4			112,902				1.4
	Consumer	47,141				0.6			63,374				0.8
	Total non-acquired loans	7,641,266				95.6			7,755,219				98.6
	Acquired loans
	Single-family residential	$	14,468			0.2	%		$	—			—	%
	Construction - speculative	—				—			—				—
	Construction - custom	—				—			—				—
	Land - acquisition & development	1,489				—			—				—
	Land - consumer lot loans	3,313				—			—				—
	Multi-family	3,914				0.1			—				—
	Commercial real estate	133,423				1.7			—				—
	Commercial & industrial	75,326				0.9			—				—
	HELOC	10,179				0.1			—				—
	Consumer	8,267				0.1			—				—
	Total acquired loans	250,379				3.1			—				—
	Credit-impaired acquired loans
	Single-family residential	333				—			342				—
	Construction - speculative	—				—			1,889				—
	Construction - custom	—				—			—				—
	Land - acquisition & development	2,396				—			3,702				0.1
	Land - consumer lot loans	—				—			—				—
	Multi-family	—				—			601				—
	Commercial real estate	76,909				1.1			87,154				1.1
	Commercial & industrial	7,925				0.1			3,292				—
	HELOC	11,266				0.1			14,040				0.2
	Consumer	71				—			97				—
	Total credit-impaired acquired loans	98,900				1.3			111,117				1.4
	Total loans
	Single-family residential	5,373,950				67.3			5,779,264				73.5
	Construction - speculative	130,778				1.6			131,526				1.6
	Construction - custom	302,722				3.8			211,690				2.7
	Land - acquisition & development	81,660				1.1			128,379				1.7
	Land - consumer lot loans	124,984				1.5			141,844				1.8
	Multi-family	835,598				10.5			710,741				9
	Commercial real estate	625,293				7.9			406,364				5.2
	Commercial & industrial	326,450				4			166,115				2.1
	HELOC	133,631				1.6			126,942				1.6
	Consumer	55,479				0.7			63,471				0.8
	Total loans	7,990,545				100	%		7,866,336				100	%
	Less:
	Allowance for probable losses	116,741							133,147
	Loans in process	275,577							213,286
	Discount on acquired loans	34,143							33,484
	Deferred net origination fees	36,054							34,421
		462,515							414,338
		$	7,528,030						$	7,451,998
	The Company originates fixed and adjustable interest rate loans, which at September 30, 2013 consisted of the following:
	Fixed-Rate					Adjustable-Rate
	Term To Maturity	Book Value				Term To Rate Adjustment	Book Value
		(In thousands)					(In thousands)
	Within 1 year	$	482,270			Less than 1 year	$	175,614
1 to 3 years	283,166				1 to 3 years	209,288
3 to 5 years	255,617				3 to 5 years	168,765
5 to 10 years	223,719				5 to 10 years	818,834
10 to 20 years	859,412				10 to 20 years	93,533
Over 20 years	3,977,904				Over 20 years	442,423
	$	6,082,088				$	1,908,457
Gross loans by geographic concentration were as follows:
September 30, 2013	Single -			Multi-			Land -			Land -			Construction - custom			Construction - speculative			Commercial			Commercial		Consumer		HELOC			Total
	family			family			A & D			lot loans									real estate			and industrial
	residential
	(In thousands)
Washington	$	2,576,400		$	285,314		$	39,355		$	65,131		$	177,062		$	66,543		$	286,676		$	210,665	$	45,313	$	71,382		$	3,823,841
Oregon	806,160			284,959			6,614			24,185			44,075			27,620			158,062			98,541		7,646		17,280			1,475,142
Arizona	579,291			123,181			12,801			11,991			30,536			11,098			95,834			2,736		180		19,731			887,379
Utah	435,250			55,930			9,491			6,489			26,433			5,955			—			636		45		6,676			546,905
Idaho	329,299			27,029			2,685			11,602			10,917			9,818			1,417			192		13		4,748			397,720
New Mexico	176,915			40,236			9,099			3,628			7,118			9,016			66,662			7,278		1,367		13,596			334,915
Other	233,725			2,110			—			—			—			—			4,516			5,118		848		41			246,358
Texas	137,628			13,809			1,615			948			3,411			728			10,131			1,253		42		—			169,565
Nevada	99,282			3,030			—			1,010			3,170			—			1,995			31		25		177			108,720
	$	5,373,950		$	835,598		$	81,660		$	124,984		$	302,722		$	130,778		$	625,293		$	326,450	$	55,479	$	133,631		$	7,990,545
Percentage by geographic area
September 30, 2013	Single -		Multi-		Land -		Land -		Construction - custom		Construction - speculative		Commercial		Commercial		Consumer		HELOC		Total
	family		family		A & D		lot loans						real estate		and industrial
	residential
	As % of total gross loans
Washington	32.9	%	3.6	%	0.5	%	0.8	%	2.2	%	0.8	%	3.6	%	2.6	%	0.6	%	0.9	%	48.5	%
Oregon	10.1		3.6		0.1		0.3		0.6		0.3		2		1.2		0.1		0.2		18.5
Arizona	7.2		1.5		0.2		0.2		0.4		0.1		1.2		—		—		0.2		11
Utah	5.4		0.7		0.1		0.1		0.3		0.1		—		—		—		0.1		6.8
Idaho	4.1		0.3		—		0.1		0.1		0.1		—		—		—		0.1		4.8
New Mexico	2.2		0.5		0.1		—		0.1		0.1		0.8		0.1		—		0.2		4.1
Other	2.9		—		—		—		—		—		0.1		0.1		—		—		3.1
Texas	1.7		0.2		—		—		—		—		0.1		—		—		—		2
Nevada	1.2		—		—		—		—		—		—		—		—		—		1.2
	67.7	%	10.4	%	1	%	1.5	%	3.7	%	1.5	%	7.8	%	4	%	0.7	%	1.7	%	100	%
Percentage by geographic area as a % of each loan type
September 30, 2013	Single -		Multi-		Land -		Land -		Construction - custom		Construction - speculative		Commercial		Commercial		Consumer		HELOC
	family		family		A & D		lot loans						real estate		and industrial
	residential
As % of total gross loans
Washington	48	%	34.1	%	48.2	%	52	%	58.5	%	50.8	%	45.9	%	64.5	%	81.7	%	53.4	%
Oregon	15		34.1		8.1		19.4		14.6		21.1		25.3		30.2		13.8		12.9
Arizona	10.8		14.7		15.7		9.6		10.1		8.5		15.3		0.8		0.3		14.8
Utah	8.1		6.7		11.6		5.2		8.7		4.6		—		0.2		0.1		5
Idaho	6.1		3.2		3.3		9.3		3.6		7.5		0.2		0.1		—		3.6
New Mexico	3.3		4.8		11.1		2.9		2.4		6.9		10.7		2.2		2.5		10.2
Other	4.3		0.3		—		—		—		—		0.7		1.6		1.5		—
Texas	2.6		1.7		2		0.8		1.1		0.6		1.6		0.4		0.1		—
Nevada	1.8		0.4		—		0.8		1		—		0.3		—		—		0.1
	100	%	100	%	100	%	100	%	100	%	100	%	100	%	100	%	100	%	100	%
The following table provides additional information on impaired loans, loan commitments and loans serviced for others:
	September 30, 2013				September 30, 2012
	(In thousands)
Recorded investment in impaired loans	$	454,557			$	565,553
Troubled Debt Restructuring included in impaired loans	415,696				433,278
Impaired loans with allocated reserves	6,035				44,167
Reserves on impaired loans	3,473				15,983
Average balance of impaired loans	495,472				523,363
Interest income from impaired loans	24,798				28,366
Outstanding fixed-rate origination commitments	190,363				151,990
Loans serviced for others	55,589				58,673
The following table sets forth information regarding non-accrual loans held by the Company:
	September 30, 2013							September 30, 2012
	(In thousands)							(In thousands)
Non-accrual loans:
Single-family residential	$	100,460			76.5	%		$	131,193			75.7	%
Construction - speculative	4,560				3.5			10,634				6.1
Construction - custom	—				—			539				0.3
Land - acquisition & development	2,903				2.2			13,477				7.8
Land - consumer lot loans	3,337				2.5			5,149				3
Multi-family	6,573				5			4,185				2.4
Commercial real estate	11,736				8.9			7,653				4.4
Commercial & industrial	477				0.4			16				—
HELOC	263				0.2			198				0.1
Consumer	990				0.8			383				0.2
Total non-accrual loans	$	131,299			100	%		$	173,427			100	%
The following tables provide an analysis of the age of loans in past due status:
September 30, 2013	Amount of Loans				Days Delinquent Based on $ Amount of Loans																			% based
Type of Loan	Net of LIP & Chg.-Offs				Current				30				60				90				Total			on $
	(In thousands)
Non-acquired loans
Single-Family Residential	$	5,356,200			$	5,237,413			$	26,888			$	12,373			$	79,526			$	118,787		2.22	%
Construction - Speculative	82,422				80,047				—				—				2,375				2,375			2.88
Construction - Custom	130,095				129,678				417				—				—				417			0.32
Land - Acquisition & Development	71,567				70,106				—				—				1,461				1,461			2.04
Land - Consumer Lot Loans	121,473				117,076				806				355				3,236				4,397			3.62
Multi-Family	790,564				785,793				—				—				4,771				4,771			0.6
Commercial Real Estate	404,680				398,114				2,942				351				3,273				6,566			1.62
Commercial & Industrial	249,405				249,363				42				—				—				42			0.02
HELOC	112,186				111,407				493				213				73				779			0.69
Consumer	47,142				45,620				849				283				390				1,522			3.23
Total non-acquired loans	7,365,734				7,224,617				32,437				13,575				95,105				141,117			1.92	%
Acquired loans
Single-Family Residential	$	14,468			$	14,343			$	82			$	—			$	43			$	125		0.86	%
Construction - Speculative	—				—				—				—				—				—			NM
Construction - Custom	—				—				—				—				—				—			NM
Land - Acquisition & Development	1,489				1,241				—				—				248				248			16.66
Land - Consumer Lot Loans	3,313				2,987				125				100				101				326			9.84
Multi-Family	3,914				3,914				—				—				—				—			—
Commercial Real Estate	133,398				128,610				134				617				4,037				4,788			3.59
Commercial & Industrial	75,323				74,992				10				153				168				331			0.44
HELOC	10,179				10,063				—				16				100				116			1.14
Consumer	8,266				7,568				90				8				600				698			8.44
Total acquired loans	250,350				243,718				441				894				5,297				6,632			2.65	%
Credit-impaired acquired loans
Single-Family Residential	333				333				—				—				—				—			—	%
Construction - Speculative	—				—				—				—				—				—			—
Construction - Custom	—				—				—				—				—				—			—
Land - Acquisition & Development	2,393				1,929				—				464				—				464			19.39
Land - Consumer Lot Loans	—				—				—				—				—				—			—
Multi-Family	—				—				—				—				—				—			—
Commercial Real Estate	83,116				80,095				2,301				—				720				3,021			3.63
Commercial & Industrial	1,705				1,396				—				—				309				309			18.12
HELOC	11,266				11,176				—				—				90				90			0.8
Consumer	71				71				—				—				—				—			—
Total credit-impaired acquired loans	98,884				95,000				2,301				464				1,119				3,884			3.93	%
Total loans	$	7,714,968			$	7,563,335			$	35,179			$	14,933			$	101,521			$	151,633		1.97	%
Most loans restructured in troubled debt restructurings ("TDRs") are accruing and performing loans where the borrower has proactively approached the Company about modifications due to temporary financial difficulties. Each request is individually evaluated for merit and likelihood of success. The concession for these loans is typically a payment reduction through a rate reduction of from 100 to 200 bps for a specific term, usually six to twelve months. Interest-only payments may also be approved during the modification period. Principal forgiveness is not an available option for restructured loans. As of September 30, 2013 single-family residential loans comprised 86% of restructured loans compared to 86% at the prior year end. The Bank reserves for restructured loans within its allowance for loan loss methodology by taking into account the following performance indicators: 1) time since modification, 2) current payment status and 3) geographic area.
The following tables provides information related to loans that were restructured during the period ending:
	September 30, 2013											September 30, 2012
				Pre-Modification				Post-Modification							Pre-Modification				Post-Modification
				Outstanding				Outstanding							Outstanding				Outstanding
	Number of			Recorded				Recorded				Number of			Recorded				Recorded
	Contracts			Investment				Investment				Contracts			Investment				Investment
				(In thousands)											(In thousands)
Troubled Debt Restructurings:
Single-Family Residential	406			$	105,551			$	105,551			787			$	183,548			$	183,548
Construction - Speculative	1			2,470				2,470				24			6,703				6,703
Construction - Custom	—			—				—				1			1,196				1,196
Land - Acquisition & Development	1			461				461				26			5,489				5,489
Land - Consumer Lot Loans	25			3,134				3,134				38			5,237				5,237
Multi-Family	1			36				36				4			3,104				3,104
Commercial Real Estate	15			11,523				11,523				4			6,224				6,224
Commercial & Industrial	1			56				56				—			—				—
HELOC	1			199				199				5			707				707
Consumer	2			33				33				—			—				—
	453			$	123,463			$	123,463			889			$	212,208			$	212,208
	September 30, 2013							September 30, 2012
	Number of			Recorded				Number of			Recorded
	Contracts			Investment				Contracts			Investment
				(In thousands)							(In thousands)
Troubled Debt Restructurings That Subsequently Defaulted:
Single-Family Residential	78			$	17,120			123			$	24,431
Construction - Speculative	—			—				—			—
Construction - Custom	—			—				—			—
Land - Acquisition & Development	—			—				—			—
Land - Consumer Lot Loans	2			237				12			1,402
Multi-Family	—			—				—			—
Commercial Real Estate	2			2,703				—			—
Commercial & Industrial	—			—				—			—
HELOC	1			79				—			—
Consumer	—			—				—			—
	83			$	20,139			135			$	25,833
The excess of cash flows expected to be collected over the initial fair value of acquired impaired loans is referred to as the accretable yield and is accreted into interest income over the estimated life of the acquired loans using the effective yield method. Other adjustments to the accretable yield include changes in the estimated remaining life of the acquired loans, changes in expected cash flows and changes of indices for acquired loans with variable interest rates.
The following table shows the changes in accretable yield for acquired impaired loans and acquired non-impaired loans for the years ended September 30, 2013 and 2012:
	30-Sep-13																30-Sep-12
	Acquired Impaired								Acquired Non-impaired								Acquired Impaired							Acquired Non-impaired
	Accretable				Carrying				Accretable				Carrying				Accretable				Carrying			Accretable			Carrying
	Yield				Amount of				Yield				Amount of				Yield				Amount of			Yield			Amount of
					Loans								Loans								Loans						Loans
	(In thousands)																(In thousands)
Balance at beginning of period	$	16,928			$	77,613			$	—			$	—			—				—			$	—		$	—
Additions	—				9,865				10,804				351,335				21,384				93,691			—			—
Reclassification from nonaccretable balance, net	30,026				—				—				—				—				—			—			—
Accretion	(9,718		)		9,718				(5,827		)		5,827				(4,456		)		4,456			—			—
Transfers to REO	—				(3,975		)		—				(7,755		)		—				(2,616		)	—			—
Payments received, net	—				(23,503		)		—				(104,034		)		—				(17,918		)	—			—
Balance at end of period	$	37,236			$	69,718			$	4,977			$	245,373			$	16,928			$	77,613		$	—		$	—
There were $9.9 million in loans acquired during Fiscal 2013 as part of the South Valley Bank acquisition for which it was probable at acquisition that all contractually required payments would not be collected. The timing and amount of future cash flows cannot be reasonable estimated; therefore, these loan are accounted for on a cash basis. The following table shows loans that were acquired during Fiscal 2012 as part of the Western National Bank acquisition and are accounted for under FASB ASC 310-30:
	Western National Bank
	16-Dec-11
Contractually required payments of interest and principal	$	171,515
Nonaccretable difference	(56,440		)
Cash flows expected to be collected (1)	115,075
Accretable yield	(21,384		)
Carrying value of acquired loans	$	93,691
(1) Represents undiscounted expected principal and interest cash flows

Allowance_for_Losses_on_Loans

Allowance for Losses on Loans	12 Months Ended
	Sep. 30, 2013
Receivables [Abstract]	'
Allowance for Losses on Loans	'
	Allowance for Losses on Loans
	The following table summarizes the activity in the allowance for loan losses for the twelve months ended September 30, 2013 and 2012:
	September 30, 2013	Beginning			Charge-offs				Recoveries				Provision &				Ending
		Allowance											Transfers				Allowance
		(In thousands)
	Single-family residential	$	81,815		$	(20,947	)		$	9,416			$	(6,100	)		$	64,184
	Construction - speculative	12,060			(1,446		)		501				(2,708		)		8,407
	Construction - custom	347			(481		)		—				1,016				882
	Land - acquisition & development	15,598			(3,983		)		4,105				(6,555		)		9,165
	Land - consumer lot loans	4,937			(1,363		)		40				(62		)		3,552
	Multi-family	5,280			(1,043		)		171				(592		)		3,816
	Commercial real estate	1,956			(747		)		17				4,369				5,595
	Commercial & industrial	7,626			(1,145		)		95				10,038				16,614
	HELOC	965			(163		)		—				200				1,002
	Consumer	2,563			(2,783		)		2,000				1,744				3,524
		$	133,147		$	(34,101	)		$	16,345			$	1,350			$	116,741
	September 30, 2012	Beginning			Charge-offs				Recoveries				Provision &				Ending
		Allowance											Transfers				Allowance
		(In thousands)
	Single-family residential	$	83,307		$	(53,789	)		$	8,164			$	44,133			$	81,815
	Construction - speculative	13,828			(4,916		)		711				2,437				12,060
	Construction - custom	623			—				—				(276		)		347
	Land - acquisition & development	32,719			(16,978		)		1,341				(1,484		)		15,598
	Land - consumer lot loans	5,520			(2,670		)		—				2,087				4,937
	Multi-family	7,623			(1,393		)		504				(1,454		)		5,280
	Commercial real estate	4,331			(814		)		225				(1,786		)		1,956
	Commercial & industrial	5,099			(249		)		2,366				410				7,626
	HELOC	1,139			(232		)		66				(8		)		965
	Consumer	2,971			(3,538		)		1,480				1,650				2,563
		$	157,160		$	(84,579	)		$	14,857			$	45,709			$	133,147
	The Company recorded a $1,350,000 provision for loan losses during the fiscal year ended September 30, 2013, while a $44,955,000 provision was recorded for the year ended September 30, 2012. The credit quality of the portfolio has been improving significantly and economic conditions are more stable.
	Non-performing assets (“NPAs”) amounted to $213,616,000, or 1.63%, of total assets at September 30, 2013, compared to $272,905,000, or 2.19%, of total assets one year ago. Acquired loans, including covered loans are not classified as non-performing loans because, at acquisition, the carrying value of these loans was adjusted to reflect fair value. For the year ended September 30, 2013, $13,800,000 in acquired loans were subject to the general allowance as the discount related to these balances is not sufficient to absorb potential losses. There was no additional provision for loan losses recorded on acquired or covered loans during the years ended September 30, 2013 and 2012. Non-accrual loans decreased from $173,427,000 at September 30, 2012, to $131,299,000 at September 30, 2013, a 24.3% decrease.
	The Company had net charge-offs of $17,756,000 for the twelve months ended September 30, 2013, compared with $69,721,000 of net charge-offs for the same period one year ago. A loan is charged-off when the loss is estimable and it is confirmed that the borrower will not be able to meet its contractual obligations.
	At September 30, 2013, $113,268,000 of the allowance was calculated under the formulas contained in our general allowance methodology and the remaining $3,473,000 was made up of specific reserves on loans that were deemed to be impaired. For the period ending September 30, 2012, $117,164,000 of the allowance was calculated under the formulas contained in our general allowance methodology and the remaining $15,983,000 was made up of specific reserves on loans that were deemed to be impaired. The primary reasons for the shift in total allowance allocation from specific reserves to general reserves is due to the Company having already addressed many of the problem loans focused in the speculative construction and land A&D portfolios, combined with an increase in delinquencies and elevated charge-offs in the single-family residential portfolio.
	The following tables show a summary of loans collectively and individually evaluated for impairment and the related allocation of general and specific reserves as of September 30, 2013 and 2012:
	September 30, 2013	Loans Collectively Evaluated for Impairment										Loans Individually Evaluated for Impairment
		General  Reserve			Gross Loans Subject  to				Ratio			Specific  Reserve				Gross Loans Subject  to				Ratio
		Allocation			General Reserve (1)							Allocation				Specific Reserve (1)
		(In thousands)										(In thousands)
	Single-family residential	$	64,184		$	5,262,159			1.2	%		$	—			$	96,989			—	%
	Construction - speculative	7,307			115,554				6.3			1,100				15,224				7.2
	Construction - custom	882			302,722				0.3			—				—				—
	Land - acquisition & development	6,943			67,521				10.3			2,222				10,254				21.7
	Land - consumer lot loans	3,506			107,216				3.3			46				14,455				0.3
	Multi-family	3,711			824,279				0.5			105				7,405				1.4
	Commercial real estate	5,595			400,789				1.4			—				14,172				—
	Commercial & industrial	16,614			256,954				6.5			—				48				—
	HELOC	1,002			111,169				0.9			—				1,017				—
	Consumer	3,524			47,141				7.5			—				—				—
		$	113,268		$	7,495,504			1.5	%		$	3,473			$	159,564			2.2	%
	___________________
	-1	Excludes acquired loans with discounts sufficient to absorb potential losses and covered loans
	September 30, 2012	Loans Collectively Evaluated for Impairment										Loans Individually Evaluated for Impairment
		General  Reserve			Gross Loans Subject  to				Ratio			Specific  Reserve				Gross Loans Subject  to				Ratio
		Allocation			General Reserve (1)							Allocation				Specific Reserve (1)
		(In thousands)										(In thousands)
	Single-family residential	$	81,737		$	5,694,337			1.4	%		$	78			$	84,584			0.1	%
	Construction - speculative	9,079			104,312				8.7			2,981				25,325				11.8
	Construction - custom	347			211,690				0.2			—				—				—
	Land - acquisition & development	6,697			47,294				14.2			8,901				77,383				11.5
	Land - consumer lot loans	4,176			138,666				3			761				3,178				23.9
	Multi-family	2,818			694,140				0.4			2,462				16,000				15.4
	Commercial real estate	1,158			292,550				0.4			798				26,660				3
Commercial & industrial	7,624			161,689				4.7			2				1,134				0.2
HELOC	965			112,812				0.9			—				90				—
Consumer	2,563			63,374				4			—				—				—
	$	117,164		$	7,520,864			1.6	%		$	15,983			$	234,354			6.8	%
___________________
-1	Excludes acquired loans and covered loans
The Company has an asset quality review function that analyzes its loan portfolios and reports the results of the review to the Board of Directors on a quarterly basis. The single-family residential, HELOC and consumer portfolios are evaluated based on their performance as a pool of loans, since no single loan is individually significant or judged by its risk rating, size or potential risk of loss. The construction, land, multi-family, commercial real estate and commercial and industrial loans are risk rated on a loan by loan basis to determine the relative risk inherent in specific borrowers or loans. Based on that risk rating, the loans are assigned a grade and classified as follows:
•	Pass – the credit does not meet one of the definitions defined below.
•	Special mention – A special mention credit is considered to be currently protected from loss but is potentially weak. No loss of principal or interest is foreseen; however, proper supervision and Management attention is required to deter further deterioration in the credit. Assets in this category constitute some undue and unwarranted credit risk but not to the point of justifying a risk rating of substandard. The credit risk may be relatively minor yet constitutes an unwarranted risk in light of the circumstances surrounding a specific asset.
•	Substandard – A substandard credit is an unacceptable credit. Additionally, repayment in the normal course is in jeopardy due to the existence of one or more well defined weaknesses. In these situations, loss of principal is likely if the weakness is not corrected. A substandard asset is inadequately protected by the current sound worth and paying capacity of the borrower or of the collateral pledged, if any. Assets so classified will have a well defined weakness or weaknesses that jeopardize the liquidation of the debt. Loss potential, while existing in the aggregate amount of substandard assets, does not have to exist in individual assets risk rated substandard.
•	Doubtful – A credit classified doubtful has all the weaknesses inherent in one classified substandard with the added characteristic that the weakness makes collection or liquidation in full, on the basis of currently existing facts, conditions and values, highly questionable and improbable. The probability of loss is high, but because of certain important and reasonably specific pending factors that may work to the advantage and strengthening of the asset, its classification as an estimated loss is deferred until its more exact status may be determined. Pending factors include proposed merger, acquisition, or liquidation procedures, capital injection, perfecting liens on additional collateral, and refinancing plans.
•	Loss – Credits classified loss are considered uncollectible and of such little value that their continuance as a bankable asset is not warranted. This classification does not mean that the asset has absolutely no recovery or salvage value, but rather it is not practical or desirable to defer writing off this asset even though partial recovery may be affected in the future. Losses should be taken in the period in which they are identified as uncollectible. Partial charge-off versus full charge-off may be taken if the collateral offers some identifiable protection.
The following tables provide information on loans based on credit quality indicators (defined above) as of September 30, 2013 and 2012:
September 30, 2013	Internally Assigned Grade																			Total
	Pass			Special mention				Substandard				Doubtful				Loss				Gross Loans
	(In thousands)
Non-acquired loans
Single-family residential	$	5,184,101		$	4,595			$	170,453			$	—			$	—			$	5,359,149
Construction - speculative	99,436			3,199				28,143				—				—				130,778
Construction - custom	302,722			—				—				—				—				302,722
Land - acquisition & development	64,355			775				12,645				—				—				77,775
Land - consumer lot loans	121,039			—				632				—				—				121,671
Multi-family	819,911			2,114				9,659				—				—				831,684
Commercial real estate	373,012			21,652				20,297				—				—				414,961
Commercial & industrial	240,441			1,049				1,709				—				—				243,199
HELOC	112,186			—				—				—				—				112,186
Consumer	46,720			—				421				—				—				47,141
	$	7,363,923		$	33,384			$	243,959			$	—			$	—			$	7,641,266
Acquired loans
Single-family residential	$	14,468		$	—			$	—			$	—			$	—			$	14,468
Construction - speculative	—			—				—				—				—				—
Construction - custom	—			—				—				—				—				—
Land - acquisition & development	312			—				1,177				—				—				1,489
Land - consumer lot loans	3,313			—				—				—				—				3,313
Multi-family	3,227			—				687				—				—				3,914
Commercial real estate	105,055			4,190				24,178				—				—				133,423
Commercial & industrial	64,933			1,309				9,084				—				—				75,326
HELOC	10,179			—				—				—				—				10,179
Consumer	8,267			—				—				—				—				8,267
	$	209,754		$	5,499			$	35,126			$	—			$	—			$	250,379
Credit impaired acquired loans
Pool 1 - Construction and land A&D	$	980		$	461			$	955			$	—			$	—			$	2,396
Pool 2 - Single-family residential	333			—				—				—				—				333
Pool 3 - Multi-family	—			—				—				—				—				—
Pool 4 - HELOC & other consumer	11,337			—				—				—				—				11,337
Pool 5 - Commercial real estate	52,509			3,155				21,245				—				—				76,909
Pool 6 - Commercial & industrial	881			—				7,044				—				—				7,925
Total credit impaired acquired loans	$	66,040		$	3,616			$	29,244			$	—			$	—			$	98,900
Total gross loans	$	7,639,717		$	42,499			$	308,329			$	—			$	—			$	7,990,545
Total grade as a % of total gross loans	95.6		%	0.5		%		3.9		%		—		%		—		%
September 30, 2012	Internally Assigned Grade																			Total
	Pass			Special mention				Substandard				Doubtful				Loss				Gross Loans
	(In thousands)
Non-acquired loans
Single-family residential	$	5,588,252		$	844			$	189,826			$	—			$	—			$	5,778,922
Construction - speculative	86,126			10,113				33,398				—				—				129,637
Construction - custom	211,690			—				—				—				—				211,690
Land - acquisition & development	73,661			4,637				46,379				—				—				124,677
Land - consumer lot loans	140,006			223				1,615				—				—				141,844
Multi-family	684,649			5,098				20,393				—				—				710,140
Commercial real estate	278,022			16,282				24,906				—				—				319,210
Commercial & industrial	158,421			1,071				3,331				—				—				162,823
HELOC	112,902			—				—				—				—				112,902
Consumer	62,611			354				409				—				—				63,374
	$	7,396,340		$	38,622			$	320,257			$	—			$	—			$	7,755,219
Acquired loans
Single-family residential	$	—		$	—			$	—			$	—			$	—			$	—
Construction - speculative	—			—				—				—				—				—
Construction - custom	—			—				—				—				—				—
Land - acquisition & development	—			—				—				—				—				—
Land - consumer lot loans	—			—				—				—				—				—
Multi-family	—			—				—				—				—				—
Commercial real estate	—			—				—				—				—				—
Commercial & industrial	—			—				—				—				—				—
HELOC	—			—				—				—				—				—
Consumer	—			—				—				—				—				—
	$	—		$	—			$	—			$	—			$	—			$	—
Credit impaired acquired loans
Pool 1 - Construction and land A&D	$	2,466		$	—			$	3,125			$	—			$	—			$	5,591
Pool 2 - Single-family residential	342			—				—				—				—				342
Pool 3 - Multi-family	—			—				601				—				—				601
Pool 4 - HELOC & other consumer	14,137			—				—				—				—				14,137
Pool 5 - Commercial real estate	53,683			4,308				28,200				963				—				87,154
Pool 6 - Commercial & industrial	1,566			58				733				935				—				3,292
Total credit impaired acquired loans	$	72,194		$	4,366			$	32,659			$	1,898			$	—			$	111,117
Total gross loans	$	7,468,534		$	42,988			$	352,916			$	1,898			$	—			$	7,866,336
Total grade as a % of total gross loans	94.9		%	0.6		%		4.5		%		—		%		—		%
The following tables provide information on non-acquired loans based on payment activity as of September 30, 2013 and 2012:
September 30, 2013	Performing Loans						Non-Performing Loans
	Amount			% of Total			Amount				% of Total
				Gross  Loans							Gross  Loans
	(In thousands)						(In thousands)
Single-family residential	$	5,258,688		98.1	%		$	100,460			1.9	%
Construction - speculative	126,218			96.5			4,560				3.5
Construction - custom	302,722			100			—				—
Land - acquisition & development	74,872			96.3			2,903				3.7
Land - consumer lot loans	118,334			97.3			3,337				2.7
Multi-family	825,111			99.2			6,573				0.8
Commercial real estate	389,423			97.1			11,736				2.9
Commercial & industrial	256,525			99.8			477				0.2
HELOC	111,923			99.8			263				0.2
Consumer	46,151			97.9			990				2.1
	$	7,509,967		98.3	%		$	131,299			1.7	%
September 30, 2012	Performing Loans						Non-Performing Loans
	Amount			% of Total			Amount				% of Total
				Gross  Loans							Gross  Loans
	(In thousands)						(In thousands)
Single-family residential	$	5,647,729		97.7	%		$	131,193			2.3	%
Construction - speculative	119,003			91.8			10,634				8.2
Construction - custom	211,151			99.7			539				0.3
Land - acquisition & development	111,200			89.2			13,477				10.8
Land - consumer lot loans	136,695			96.4			5,149				3.6
Multi-family	705,955			99.4			4,185				0.6
Commercial real estate	311,557			97.6			7,653				2.4
Commercial & industrial	162,807			100			16				—
HELOC	112,704			99.8			198				0.2
Consumer	62,991			99.4			383				0.6
	$	7,581,792		97.8	%		$	173,427			2.2	%
The following tables provide information on impaired loans based on loan types as of September 30, 2013 and 2012:
September 30, 2013	Recorded			Unpaid				Related				Average
	Investment			Principal				Allowance				Recorded
				Balance								Investment
	(In thousands)
With no related allowance recorded:
Single-family residential	$	33,883		$	38,928			$	—			$	21,458
Construction - speculative	3,891			4,099				—				3,339
Construction - custom	—			—				—				—
Land - acquisition & development	3,020			10,705				—				2,548
Land - consumer lot loans	3,186			3,376				—				1,839
Multi-family	4,929			4,929				—				1,734
Commercial real estate	23,537			31,876				—				9,651
Commercial & industrial	7,279			31,197				—				3,123
HELOC	446			946				—				133
Consumer	601			618				—				127
	80,772			126,674				—				43,952
With an allowance recorded:
Single-family residential	335,140			341,910				15,137				330,407
Construction - speculative	8,892			9,342				1,100				12,362
Construction - custom	—			—				—				—
Land - acquisition & development	2,598			4,002				—				8,315
Land - consumer lot loans	12,631			13,014				2,222				12,301
Multi-family	5,958			6,178				46				7,731
Commercial real estate	7,539			8,476				105				9,321
Commercial & industrial	56			56				—				11
HELOC	938			938				—				858
Consumer	33			33				—				9
	373,785			383,949				18,610			-1	381,315
Total:
Single-family residential	369,023			380,838				15,137				351,865
Construction - speculative	12,783			13,441				1,100				15,701
Construction - custom	—			—				—				—
Land - acquisition & development	5,618			14,707				—				10,863
Land - consumer lot loans	15,817			16,390				2,222				14,140
Multi-family	10,887			11,107				46				9,465
Commercial real estate	31,076			40,352				105				18,972
Commercial & industrial	7,335			31,253				—				3,134
HELOC	1,384			1,884				—				991
Consumer	634			651				—				136
	$	454,557		$	510,623			$	18,610		-1	$	425,267
____________________
-1	Includes $3,473,000 of specific reserves and $15,137,000 included in the general reserves.
September 30, 2012	Recorded			Unpaid				Related				Average
	Investment			Principal				Allowance				Recorded
				Balance								Investment
	(In thousands)
With no related allowance recorded:
Single-family residential	$	106,955		$	124,342			$	—			$	49,524
Construction - speculative	13,726			16,568				—				13,581
Construction - custom	—			—				—				—
Land - acquisition & development	18,000			30,209				—				16,417
Land - consumer lot loans	1,677			2,185				—				487
Multi-family	8,792			8,991				—				6,935
Commercial real estate	31,190			42,656				—				12,946
Commercial & industrial	1,146			7,363				—				581
HELOC	90			1,066				—				36
Consumer	—			4				—				—
	181,576			233,384				—				100,507
With an allowance recorded:
Single-family residential	317,901			317,901				25,723				305,350
Construction - speculative	12,836			12,836				2,981				12,822
Construction - custom	—			—				—				—
Land - acquisition & development	20,750			20,750				8,901				21,650
Land - consumer lot loans	13,881			13,881				761				13,126
Multi-family	14,153			14,555				2,462				14,279
Commercial real estate	3,722			3,722				798				2,897
Commercial & industrial	—			2				2				22
HELOC	734			734				—				743
Consumer	—			—				—				—
	383,977			384,381				41,628			-1	370,889
Total:
Single-family residential	424,856			442,243				25,723				354,874
Construction - speculative	26,562			29,404				2,981				26,403
Construction - custom	—			—				—				—
Land - acquisition & development	38,750			50,959				8,901				38,067
Land - consumer lot loans	15,558			16,066				761				13,613
Multi-family	22,945			23,546				2,462				21,214
Commercial real estate	34,912			46,378				798				15,843
Commercial & industrial	1,146			7,365				2				603
HELOC	824			1,800				—				779
Consumer	—			4				—				—
	$	565,553		$	617,765			$	41,628		-1	$	471,396
____________________
-1	Includes $15,983,000 of specific reserves and $25,645,000 included in the general reserves.

Interest_Receivable

Interest Receivable	12 Months Ended
	Sep. 30, 2013
Receivables [Abstract]	'
Interest Receivable	'
	INTEREST RECEIVABLE
	September 30,	2013		2012
		(In thousands)
	Loans receivable	$	41,043	$	40,600
	Mortgage-backed securities	6,428		5,187
	Investment securities	1,747		1,070
		$	49,218	$	46,857
	These amounts do not include interest income related to swaps of $182,000 for 2013. There were not any swaps for 2012.

Premises_and_Equipment

Premises and Equipment	12 Months Ended
	Sep. 30, 2013
Property, Plant and Equipment [Abstract]	'
Premises and Equipment	'
	PREMISES AND EQUIPMENT
	September 30,		2013			2012
			(In thousands)
		Estimated
		Useful Life
	Land	—	$	92,560		$	82,426
	Buildings	25 - 40	132,822			114,106
	Leasehold improvements	7 - 15	8,411			7,530
	Furniture, fixtures and equipment	2 - 10	36,798			33,522
			270,591			237,584
	Less accumulated depreciation and amortization		(64,419		)	(58,739		)
			$	206,172		$	178,845
	The Company has non-cancelable operating leases for branch offices. Future minimum net rental commitments for all non-cancelable leases, including maintenance and associated costs, were as follows: $4.2 million for 2014, $3.5 million for 2015, $2.5 million for 2016, $1.8 million for 2017 and $6.6 million thereafter. Rental expense, including amounts paid under month-to-month cancelable leases, amounted to $4,680,000, $3,825,000 and $3,083,000 in 2013, 2012 and 2011, respectively.

Customer_Accounts

Customer Accounts	12 Months Ended
	Sep. 30, 2013
Banking and Thrift [Abstract]	'
Customer Accounts	'
	CUSTOMER ACCOUNTS
	September 30,	2013			2012
		(In thousands)
	Checking accounts, .15% and under	$	1,247,885		$	894,639
	Passbook and statement accounts, .20% and under	404,937			314,634
	Insured money market accounts, .01% to .30%	1,888,020			1,737,180
	Certificate accounts
	Less than 2.00%	4,716,427			4,308,341
	2.00% to 2.99%	631,256			841,520
	3.00% to 3.99%	175,549			381,324
	4.00% to 4.99%	25,335			98,119
	5.00% to 5.99%	862			861
	Total certificates	5,549,429			5,630,165
		$	9,090,271		$	8,576,618
	Certificate maturities are as follows:
	September 30,	2013			2012
		(In thousands)
	Within 1 year	$	3,642,142		$	3,556,701
	1 to 2 years	789,037			1,013,450
	2 to 3 years	406,960			425,559
	Over 3 years	711,290			634,455
		$	5,549,429		$	5,630,165
	Customer accounts over $250,000 totaled $1,336,054,000 as of September 30, 2013 and $1,036,388,000 as of September 30, 2012.
	Interest expense on customer accounts consisted of the following:
	Year ended September 30,	2013			2012			2011
		(in thousands)
	Checking accounts	$	936		$	857		$	1,908
	Passbook and statement accounts	566			574			682
	Insured money market accounts	4,280			4,609			7,148
	Certificate accounts	62,669			81,506			106,878
		68,451			87,546			116,616
	Less early withdrawal penalties	(548		)	(607		)	(781		)
		$	67,903		$	86,939		$	115,835
	Weighted average interest rate at end of year	0.69		%	0.9		%	1.14		%
	Weighted daily average interest rate during the year	0.75		%	0.99		%	1.32		%

FHLB_Advances_and_Other_Borrow

FHLB Advances and Other Borrowings	12 Months Ended
	Sep. 30, 2013
Banking and Thrift [Abstract]	'
FHLB Advances and Other Borrowings	'
	FHLB ADVANCES AND OTHER BORROWINGS
	Maturity dates of FHLB advances were as follows:
	September 30,	2013			2012
		(In thousands)
	FHLB advances
	Within 1 year	—			—
	1 to 3 years	350,000			100,000
	4 to 5 years	850,000			500,000
	More than 5 years	730,000			1,280,000
		$	1,930,000		$	1,880,000
	$175,000,000 of the 2013 advances and $450,000,000 of the 2012 advances included in the above table are callable by the FHLB. If these callable advances were to be called at the earliest call dates, the maturities of all FHLB advances would be as follows:
	September 30,	2013			2012
		(In thousands)
	FHLB advances
	Within 1 year	$	175,000		$	275,000
	1 to 3 years	350,000			275,000
	4 to 5 years	775,000			500,000
	More than 5 years	630,000			830,000
		$	1,930,000		$	1,880,000
	Financial data pertaining to the weighted-average cost and the amount of FHLB advances were as follows:
	September 30,	2013			2012			2011
		(In thousands)
	Weighted average interest rate at end of year	3.52		%	3.6		%	4.1		%
	Weighted daily average interest rate during the year	3.57		%	4.14		%	4.35		%
	Daily average of FHLB advances	$	1,905,479		$	1,949,019		$	1,883,135
	Maximum amount of FHLB advances at any month end	1,930,000			1,961,895			1,962,616
	Interest expense during the year (excludes interest rate swap expense)	68,075			80,617			81,994
	FHLB advances are collateralized as provided for in the Advances, Pledge and Security Agreement by all FHLB stock owned by the Company, deposits with the FHLB and certain mortgages or deeds of trust securing such properties as provided in the agreements with the FHLB. As a member of the FHLB of Seattle, the Company currently has a credit line of 50% of the total assets of the Bank, subject to collateralization requirements.
	As of September 30, 2013 and 2012, respectively, there were no reverse repurchase agreements or other borrowings.
	The Bank has historically entered into sales of reverse repurchase agreements. Fixed-coupon reverse repurchase agreements have been treated as financings, and the obligations to repurchase securities sold have been reflected as a liability in the consolidated statements of financial condition.
	Financial data pertaining to the weighted-average cost and the amount of securities sold under agreements to repurchase in prior years were as follows:
	September 30,	2013			2012			2011
		(Dollars in thousands)
	Weighted average interest rate at end of year	—		%	—		%	3.9		%
	Weighted daily average interest rate during the year	—		%	3.71		%	3.73		%
	Daily average of securities sold under agreements to repurchase	$	—		$	692,896		$	800,000
	Maximum securities sold under agreements to repurchase at any month end	—			800,000			800,000
	Interest expense during the year	—			25,693			29,867

Derivatives_and_Hedging_Activi

Derivatives and Hedging Activities Derivatives and Hedging Activities	12 Months Ended
	Sep. 30, 2013
Derivative Instruments and Hedging Activities Disclosure [Abstract]	'
Derivatives and Hedging Activities	'
	DERIVATIVES AND HEDGING ACTIVITIES
	The Company periodically enters into certain interest rate swap agreements in order to provide commercial loan customers the ability to convert their obligations from variable to fixed interest rates. Under these agreements, the Company enters into a variable-rate loan agreement with a customer in addition to a swap agreement, and then enters into a corresponding swap agreement with a third party in order to offset its exposure on the customer swap agreement. As the interest rate swap agreements with the customers and third parties are not designated as hedges under "FASB ASC 815, Derivatives and Hedging", the instruments are marked to market in earnings.
	The notional amount of open interest rate swap agreements at September 30, 2013 was $83,593,679. There was no net impact on income due to changes in fair value for the 12 months ended September 30, 2013 as the changes in value for the asset swap and the liability swap offset each other. The fee income related to swaps was $552,609 for 2013, and this amount is included in miscellaneous loan fees.
	The Company periodically enters into forward contracts to purchase mortgage-backed securities as part of its interest rate risk management program. The Company has determined anticipated purchase dates for each forward commitment to be mid-October 2013. The notional amount of commitments to purchase mortgage-backed securities at September 30, 2013 was $200,000,000. The fair value of these contracts is included with the available-for-sale securities on the statement of financial condition.
	The following table presents the fair value and balance sheet classification of derivatives not designated as hedging instruments at September 30, 2013 and September 30, 2012:
		Asset Derivatives					Liability Derivatives
		30-Sep-13			30-Sep-12		30-Sep-13			30-Sep-12
		Balance Sheet			Balance Sheet		Balance Sheet			Balance Sheet
		Location	Fair Value		Location	Fair Value	Location	Fair Value		Location	Fair Value
		(In thousands)
	Interest rate contracts	Other assets	$	7	N/A	N/A	Other liabilities	$	7	N/A	N/A
	Commitments to purchase MBS	AFS securities	3,188		N/A	N/A	N/A	N/A		N/A	N/A

Income_Taxes

Income Taxes	12 Months Ended
	Sep. 30, 2013
Income Tax Disclosure [Abstract]	'
Income Taxes	'
	INCOME TAXES
	The Consolidated Statements of Financial Condition at September 30, 2013 and 2012 include net deferred tax assets (liabilities) of $22,554,000 and $8,449,000, respectively, that have been provided for the temporary differences between the tax basis and the financial statement carrying amounts of liabilities and assets. The major sources of these temporary differences and their deferred tax effects were as follows:
	September 30,	2013			2012
		(In thousands)
	Deferred tax assets
	Loan loss reserves	$	52,182		$	48,932
	REO reserves	18,018			24,003
	Asset Purchase Tax Basis Difference (net)	20,008			29,165
	Delinquent accrued interest	6,536			5,932
	Other, net	3,810			958
	Total deferred tax assets	100,554			108,990
	Deferred tax liabilities
	FDIC indemnification asset	8,033			21,050
	Federal Home Loan Bank stock dividends	34,367			35,557
	Valuation adjustment on available-for-sale securities	3,706			7,731
	Loan origination costs	11,980			12,670
	Depreciation	19,722			22,313
	Deferred gain on forward commitments	—			—
	Core deposit intangible	192			1,220
	Total deferred tax liabilities	78,000			100,541
	Net deferred tax asset	22,554			8,449
	Current tax asset	21,446			14,064
	Net tax asset	$	44,000		$	22,513
	A reconciliation of the statutory federal income tax rate to the effective income tax rate follows:
	Year ended September 30,	2013		2012		2011
	Statutory income tax rate	35	%	35	%	35	%
	State income tax	2		2		2
	Other differences	(2	)	(1	)	(1	)
	Effective income tax rate	35	%	36	%	36	%
	Income taxes (benefit) are summarized as follows:
		2013			2012
	Federal:
	Current	$	66,756		$	57,047
	Deferred	10,355			15,589
		77,111			72,636
	State:
	Current	$	5,213		$	4,091
	Deferred	787			1,001
		6,000			5,092
	Total
	Current	71,969			61,138
	Deferred	11,142			16,590
		$	83,111		$	77,728
	A reconciliation of the beginning and ending amount of unrecognized tax benefits is as follows:
		2013			2012
		(In thousands)
	Balance at October 1,	$	4,509		$	4,191
	Tax positions related to current year:
	Additions	—			—
	Reductions	—			—
	Tax positions related to prior years:
	Additions	234			506
	Reductions	(1,293		)	—
	Settlements with taxing authorities	(302		)	—
	Lapses in statues of limitations	(3,033		)	(188		)
	Balance at September 30,	$	115		$	4,509
	As of 2013 and 2012, the Company's liability for uncertain tax positions was $0.1 million and $3.2 million, respectively. Included in the balance of unrecognized tax benefits at 2013, are $0.1 million of tax benefits that, if recognized, would affect the effective tax rate. The Company records interest and penalties related to uncertain tax positions in income tax expense. As of 2013 and 2012, there were approximately $0.0 million and $2.0 million, respectively, of accrued interest and $0.0 million and $0.3 million, respectively, of accrued penalties.
	Based on current information the Company does not expect that changes in the amount of unrecognized tax benefits over the next twelve months will have a significant impact on the results of operations or the financial position of the Company.
	The Company's federal income tax returns are open for the tax years 2010 through 2013. State income tax returns are generally subject to examination for a period of three to five years after filing of the respective return. The state impact of any federal changes remains subject to examination by various states for a period of up to two years after formal notification to the states. The Company has various federal and state income tax returns in the process of examination. The Company's unrecognized tax benefits are related to state returns open from 2010 through 2013.
	The Company has been examined by the Internal Revenue Service through the year ended September 30, 1990. There were no material changes made to the Company's originally reported taxable income as a result of this examination.

401k_and_Employee_Stock_Owners

401(k) and Employee Stock Ownership Plan	12 Months Ended
	Sep. 30, 2013
Compensation and Retirement Disclosure [Abstract]	'
401(k) and Employee Stock Ownership Plan	'
	401(k) AND EMPLOYEE STOCK OWNERSHIP PLAN
	The Company maintains a 401(k) and Employee Stock Ownership Plan (the "Plan") for the benefit of its employees. Company contributions are made semi-annually as approved by the Board of Directors. Such amounts are not in excess of amounts permitted by the Employee Retirement Income Security Act of 1974.
	Plan participants may make voluntary after-tax contributions of their considered earnings as defined by the Plan. In addition, participants may make pre-tax contributions up to the statutory limits through the 401(k) provisions of the Plan. The annual addition from contributions to an individual participant's account in this Plan cannot exceed the lesser of 100% of base salary or $49 thousand. Under provisions of the Plan, employees are eligible to participate on the date of hire and become fully vested in the Company's contributions following six years of service.
	In August 1995 the Company received a favorable determination from the Internal Revenue Service to include an Employee Stock Ownership feature as part of the Plan. This feature allows employees to direct a portion of their vested account balance toward the purchase of Company stock. Company contributions to the Plan amounted to $5,870,000, $5,400,000 and $5,400,000 for the years ended 2013, 2012 and 2011, respectively.

Stock_Award_Plans

Stock Award Plans	12 Months Ended
	Sep. 30, 2013
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]	'
Stock Option Plans	'
	STOCK AWARD PLANS
	The Company has one equity-based compensation plan which was approved by stockholders and provides for a combination of stock options and stock grants. Stockholders authorized 5,000,000 shares of common stock to be reserved pursuant to the 2011 Incentive Plan. Under the Plan, 4,357,600 shares remain available for issuance.
	Stock option awards are granted with an exercise price equal to the market price of the Company's stock at the date of grant; those option awards generally vest based on 5 years of continuous service and have 10-year contractual terms. The Company's policy is to issue new shares upon option exercises. The fair value of options granted is estimated on the date of grant using the Black-Scholes option-pricing model. This model requires input of highly subjective assumptions, changes to which can materially affect the fair value estimate. Additionally, there may be other factors that would otherwise have a significant effect on the value of employee stock options granted but are not considered by the model. Expected volatility is based on the historical volatility of the Company's stock. The risk-free interest rate is based on the U.S. Treasury yield curve that is in effect at the time of grant with a remaining term equal to the options' expected life. The expected term represents the period of time that options granted are expected to be outstanding.
	The following weighted-average assumptions were used to estimate the fair value of stock options granted during the periods indicated:
	Year ended September 30,	2013		2012		2011
	Annual dividend yield	—	%	2.34	%	1.89	%
	Expected volatility	—	%	31	%	30	%
	Risk-free interest rate	—	%	0.77	%	2	%
	Expected life	0.0 years		4.5 years		4.5 years
	A summary of stock option activity under the Plan as of 2013 and changes during the year is as follows:
	Options	Shares		Weighted			Weighted	Aggregate
				Average			Average	Intrinsic
				Exercise			Remaining	Value
				Price			Contractual	(In thousands)
							Term
	Outstanding at September 30, 2012	2,300,106		$	20.6		4	$	1,269
	Granted	—		—
	Exercised	(236,691	)	18.12
	Forfeited	(159,837	)	20.31
	Outstanding at September 30, 2013	1,903,578		$	20.93		4	$	2,563
	Exercisable at September 30, 2013	1,615,828		$	21.82		3	$	1,196
	Miscellaneous information related to stock options is presented below:
		2013			2012			2011
		(Dollars in thousands)
	Compensation cost for stock options	$	473		$	848		$	1,087
	Weighted avg. grant date FV	3.24			3.53			3.89
	Total intrinsic value of options exercised	781			125			259
	Grant date FV of options exercised	791			54			312
	Cash received from option exercises	4,261			357			1,630
	Tax benefit realized for option exercises	1			—			37
	A summary of the Company's non-vested stock options as of 2013 and changes during the year is as follows:
	Non-vested Options	Shares		Weighted
				Average
				Grant Date
				Fair Value
	Outstanding at September 30, 2012	614,272		$	3.2
	Granted	—		—
	Vested	(283,407	)	2.95
	Forfeited	(43,115	)	3.25
	Outstanding at September 30, 2013	287,750		$	3.44
	As of September 30, 2013, unrecognized compensation cost for stock options, net of forfeitures, totaled $740,123, which is expected to be recognized over a weighted average remaining period of 2.1 years.
	The Company also grants shares of restricted stock awards pursuant to its 2011 Incentive Plan. These shares of restricted stock vest over a period of one to seven years. The Company had a total of 834,935 shares of restricted stock issued as of September 30, 2013, with a fair market value at the date of grant of $14.2 million. At the prior year end, the Company had a total of 630,735 shares issued with a fair market value at the date of grant of $10.7 million.
	A summary of the Company's non-vested share awards as of 2013 and changes during the year is as follows:
	Non-vested Share Awards	Shares		Weighted
				Average
				Grant Date
				Fair Value
	Outstanding at September 30, 2012	189,609
	Granted	268,750
	Vested	(225,542	)
	Forfeited	(23,150	)
	Outstanding at September 30, 2013	209,667		$	15.89
	The Company accounts for restricted stock grants by recording the fair value of the grant to compensation expense over the vesting period. Compensation expense related to restricted stock was $2,815,049, $1,992,000 and $1,537,000 for the years ended 2013, 2012 and 2011, respectively.

Stockholders_Equity

Stockholders' Equity	12 Months Ended
	Sep. 30, 2013
Equity [Abstract]	'
Stockholders' Equity	'
	STOCKHOLDERS' EQUITY
	The Company and the Bank are subject to various regulatory capital requirements. Quantitative measures established by regulation to ensure capital adequacy require the Company and the Bank to maintain minimum amounts and ratios (set forth in the following table) of total and Tier 1 capital to risk weighted assets (as defined in the regulations) and Tier 1 capital to average assets (as defined in the regulations). Failure to meet minimum capital requirements can initiate certain mandatory and possibly additional discretionary action by regulators that, if undertaken, could have a direct material effect on the Company's financial statements. The Company and the Bank are also subject to certain restrictions on the amount of dividends that they may declare without prior regulatory approval.
	As of September 30, 2013 and 2012, the Company and the Bank met all capital adequacy requirements to which they are subject, and the OCC categorized the Bank as well capitalized under the regulatory framework for prompt corrective action. To be categorized as well capitalized, the Bank must maintain minimum total risk-based, Tier 1 risk-based and Tier 1 leverage ratios as set forth in the following table. The Bank's actual capital amounts and ratios as of these dates are also presented. There are no conditions or events since that management believes have changed the Bank's categorization.
		Actual				Capital Adequacy			Categorized as Well Capitalized Under Prompt Corrective Action Provisions
						Guidelines
		Capital		Ratio		Capital	Ratio		Capital	Ratio
	As of September 30, 2013	(In thousands)
	Total Capital (to risk-weighted assets)
	The Company	$	1,749,383	26.49	%	$528,243	8	%	NA	NA
	The Bank	$	1,693,227	25.64	%	$528,380	8	%	$660,475	10	%
	Tier I Capital (to risk-weighted assets)
	The Company	$	1,666,091	25.23	%	$264,121	4	%	NA	NA
	The Bank	$	1,609,914	24.38	%	$264,190	4	%	$396,285	6	%
	Tier 1 Capital (to average assets)
	The Company	$	1,666,091	13.03	%	$511,334	4	%	NA	NA
	The Bank	$	1,609,914	12.59	%	$511,358	4	%	$639,197	5	%
	As of September 30, 2012
	Total Capital (to risk-weighted assets)
	The Company	$	1,707,211	28.14	%	$485,310	8	%	NA	NA
	The Bank	$	1,653,760	27.29	%	$484,822	8	%	$606,028	10	%
	Tier I Capital (to risk-weighted assets)
	The Company	$	1,630,656	26.88	%	$242,655	4	%	NA	NA
	The Bank	$	1,577,280	26.03	%	$242,411	4	%	$363,617	6	%
	Tier 1 Capital (to average assets)
	The Company	$	1,630,656	12.83	%	$508,534	4	%	NA	NA
	The Bank	$	1,577,280	12.92	%	$488,445	4	%	$610,556	5	%
	At periodic intervals, the Federal Reserve, the OCC and the Federal Deposit Insurance Corporation (FDIC) routinely examine the Company's and the Bank's financial statements as part of their oversight. Based on their examinations, these regulators can direct that the Company's or Bank's financial statements be adjusted in accordance with their findings. The extent to which forthcoming regulatory examinations may result in adjustments to the financial statements cannot be determined; however, no adjustments were proposed as a result of the most recent examination which concluded in July, 2013.
	The Federal Reserve and the OCC approved final capital rules in July 2013 that substantially amend the existing capital rules for bank holding companies and banks. These are further described in the 10-K report under "Washington Federal, National Association (Bank) - Regulatory Capital Requirements".
	The Company has an ongoing stock repurchase program. 6,315,196 shares were repurchased during 2013 at a weighted average cost of $17.46. In 2012, 2,895,484 shares were repurchased during the year at a weighted average price of $14.48. As of September 30, 2013, management had authorization from the Board of Directors to repurchase up to 9,872,834 additional shares.
	In connection with 2008 Troubled Asset Relief Program ("TARP") the Company issued 1,707,456 warrants to purchase common stock at an exercise price of $17.57. As of September 30, 2013, 1,700,856 warrants remained outstanding with an expiration date of November 14, 2018. The warrants have been included in the calculation of diluted shares outstanding using the treasury stock method.

Fair_Values_of_Financial_Instr

Fair Values of Financial Instruments	12 Months Ended
	Sep. 30, 2013
Fair Value Disclosures [Abstract]	'
Fair Value of Financial Instruments	'
	FAIR VALUES OF FINANCIAL INSTRUMENTS
	U.S. GAAP requires disclosure of fair value information about financial instruments, whether or not recognized on the statement of financial condition, for which it is practicable to estimate those values. Certain financial instruments and all non-financial instruments are excluded from the disclosure requirements. Accordingly, the aggregate fair value estimates presented do not reflect the underlying fair value of the Company. Although management is not aware of any factors that would materially affect the estimated fair value amounts presented, such amounts have not been comprehensively revalued for purposes of these financial statements since that date, and therefore, estimates of fair value subsequent to that date may differ significantly from the amounts presented below.
			2013				2012
		Level in Fair Value Hierarchy	Carrying		Estimated		Carrying			Estimated
			Amount		Fair Value		Amount			Fair Value
			(In thousands)
	Financial assets
	Cash and cash equivalents	1	$	203,563	$	203,563	$	751,430		$	751,430
	Available-for-sale securities:
	Equity securities	1	101,237		101,237					—
	Obligations of U.S. government	2	533,975		533,975		183,560			183,560
	Obligations of states and political subdivisions	2	22,545		22,545		24,844			24,844
	Obligations of foreign governments		—		—		—			—
	Corporate debt securities	2	452,015		452,015		403,325			403,325
	Mortgage-backed securities
	Agency pass-through certificates	2	1,251,176		1,251,176		1,169,976			1,169,976
	Other debt securities		—		—		—			—
	Total available-for-sale securities		2,360,948		2,360,948		1,781,705			1,781,705
	Held-to-maturity securities:	2
	Equity securities		—		—		—			—
	Obligations of U.S. government		—		—		—			—
	Obligations of states and political subdivisions		—		—		795			802
	Obligations of foreign governments		—		—		—			—
	Corporate debt securities		—		—		—			—
	Mortgage-backed securities
	Agency pass-through certificates		1,654,666		1,582,849		1,190,692			1,216,421
	Other debt securities		—		—		—			—
	Total held-to-maturity securities		1,654,666		1,582,849		1,191,487			1,217,223
	Loans receivable	3	7,528,030		8,070,279		7,451,998			7,949,892
	Covered loans	3	295,947		300,610		288,376			289,754
	FDIC indemnification asset	3	64,615		62,300		87,571			85,846
	FHLB stock	2	173,009		173,009		149,840			149,840
	Financial liabilities
	Customer accounts	2	9,090,271		8,585,068		8,576,618			8,406,432
	FHLB advances and other borrowings	2	1,930,000		2,064,248		1,880,000			2,110,223
	For a description of the level in fair value hierarchy under the provisions of the Fair Value Measurements and Disclosures topic of the FASB Accounting Standards Codification please see note Q.
	The following methods and assumptions were used to estimate the fair value of financial instruments:
	Cash and cash equivalents – The carrying amount of these items is a reasonable estimate of their fair value.
	Available-for-sale securities and held-to-maturity securities – Securities at fair value are priced using model pricing based on the securities' relationship to other benchmark quoted prices as provided by an independent third party and under the provisions of the Fair Value Measurements and Disclosures topic of the FASB Accounting Standards Codification are considered a Level 2 input method except for equity securities which are considered a Level 1 input method.
	Loans receivable and covered loans – For certain homogeneous categories of loans, such as fixed- and variable-rate residential mortgages, fair value is estimated for securities backed by similar loans, adjusted for differences in loan characteristics, using the same methodology described above for AFS and HTM securities. The fair value of other loan types is estimated by discounting the future cash flows and estimated prepayments using the current rates at which similar loans would be made to borrowers with similar credit ratings and for the same remaining term. Some loan types were valued at carrying value because of their floating rate or expected maturity characteristics. Net deferred loan fees are not included in the fair value calculation but are included in the carrying amount.
	FDIC indemnification asset – The fair value of the indemnification asset is estimated by discounting the expected future cash flows using the current rates .
	FHLB stock – The fair value is based upon the redemption value of the stock which equates to its carrying value.
	Customer accounts – The fair value of demand deposits, savings accounts, and money market accounts is the amount payable on demand at the reporting date. The fair value of fixed-maturity certificates of deposit is estimated by discounting the estimated future cash flows using the rates currently offered for deposits with similar remaining maturities.
	FHLB advances and other borrowings – The fair value of FHLB advances and other borrowings is estimated by discounting the estimated future cash flows using rates currently available to the Company for debt with similar remaining maturities.
	Fair Value Measurements
	U.S. GAAP defines fair value as the exchange price that would be received for an asset or paid to transfer a liability (an exit price) in the principal or most advantageous market for the asset or liability in an orderly transaction between market participants on the measurement date. U.S. GAAP also establishes a fair value hierarchy which requires an entity to maximize the use of observable inputs and minimize the use of unobservable inputs when measuring fair value. The standard describes three levels of inputs that may be used to measure fair value:
	Level 1: Quoted prices (unadjusted) for identical assets or liabilities in active exchange markets that the entity has the ability to access as of the measurement date.
	Level 2: Significant other observable inputs other than Level 1 prices, such as quoted prices for similar assets or liabilities, quoted prices in markets that are not active and other inputs that are observable or can be corroborated by observable market data.
	Level 3: Significant unobservable inputs that reflect a company’s own assumptions about the assumptions that market participants would use in pricing an asset or liability.
	We have established and documented the Company's process for determining the fair values of our assets and liabilities, where applicable. Fair value is based on quoted market prices, when available, for identical or similar assets or liabilities. In the absence of quoted market prices, fair value is determined using valuation models or third-party appraisals. The following is a description of the valuation methodologies used to measure and report the fair value of financial assets and liabilities on a recurring or nonrecurring basis:
	Measured on a Recurring Basis
	Securities
	Securities available for sale are recorded at fair value on a recurring basis. Securities at fair value are priced using model pricing based on the securities' relationship to other benchmark quoted prices as provided by an independent third party (primarily Bloomberg), and under the provisions of FASB ASC 820, Fair Value Measurement, are considered a Level 2 input method.
	The following table presents the balance of assets measured at fair value on a recurring basis at September 30, 2013:
		Fair Value at September 30, 2013
		Level 1			Level 2			Level 3				Total
		(In thousands)
	Available-for-sale securities
	Equity securities	$	101,237		$	—		$	—			$	101,237
	Obligations of U.S. government	—			533,975			—				533,975
	Obligations of states and political subdivisions	—			22,545			—				22,545
	Obligations of foreign governments	—			—			—				—
	Corporate debt securities	—			452,015			—				452,015
Agency pass through mortgage-backed securities	—			1,251,176			—				1,251,176
Other debt securities	—			—			—				—
Balance at end of period	$	101,237		$	2,259,711		$	—			$	2,360,948
There were no transfers between, into and/or out of Levels 1, 2 or 3 during the year ended September 30, 2013 other than a transfer from Level 2 to Level 1 of $511 in Equity Securities.
Measured on a Nonrecurring Basis
Impaired Loans & Real Estate Held for Sale
From time to time, and on a nonrecurring basis, fair value adjustments to collateral-dependent loans and real estate held for sale are recorded to reflect write-downs of principal balances based on the current appraised or estimated value of the collateral. When management determines that the fair value of the collateral or the real estate held for sale requires additional adjustments, either as a result of a non-current appraisal value or when there is no observable market price, the Company classifies the impaired loan or real estate held for sale as Level 3. Level 3 assets recorded at fair value on a nonrecurring basis at September 30, 2013, included loans for which a specific reserve allowance was established or a partial charge-off was recorded based on the fair value of collateral, as well as covered REO and real estate held for sale for which fair value of the properties was less than the cost basis. Real estate held for sale consists principally of properties acquired through foreclosure.
The following table presents the aggregated balance of assets measured at estimated fair value on a nonrecurring basis for the year ended September 30, 2013, and the total losses resulting from those fair value adjustments for the quarter and year ended September 30, 2013. These estimated fair values are shown gross of estimated selling costs:
	Through September 30, 2013												Quarter		Year Ended September 30, 2013
													Ended
													30-Sep-13
	Level 1			Level  2			Level  3				Total		Total Losses
	(In thousands)
Impaired loans (1)	$	—		$	—		$	87,170			$	87,170	$	366	$	13,371
Covered REO (2)	—			—			20,308				20,308		208		811
Real estate held for sale (2)	—			—			82,840				82,840		4,618		24,268
Balance at end of period	$	—		$	—		$	190,318			$	190,318	$	5,192	$	38,450
___________________
-1	The losses represents remeasurements of collateral-dependent loans.
-2	The losses represents aggregate writedowns and charge-offs on real estate held for sale.
There were no liabilities carried at fair value, measured on a recurring or nonrecurring basis, at September 30, 2013.
The following describes the process used to value Level 3 assets measured on a nonrecurring basis:
Impaired loans - The Company adjusts the carrying amount of impaired loans when there is evidence of probable loss and the expected fair value of the loan is less than its contractual amount. The amount of the impairment may be determined based on the estimated present value of future cash flows or the fair value of the underlying collateral. Impaired loans with a specific reserve allowance based on cash flow analysis or the value of the underlying collateral are classified as Level 3 assets.
The evaluations for impairment are prepared by the Problem Loan Review Committee, which is chaired by the Chief Credit Officer and includes the Loan Review manager and Special Credits manager, as well as senior credit officers, division managers and group executives, as applicable. These evaluations are performed in conjunction with the quarterly allowance for loan loss ("ALLL") process.
Applicable loans are evaluated for impairment on a quarterly basis. Loans included in the previous quarter's review are reevaluated and if their values are materially different from the prior quarter evaluation, the underlying information (loan balance and collateral value) are compared. Material differences are evaluated for reasonableness and discussions are held between the relationship manager and their division manager to understand the difference and determine if any adjustment is necessary. The inputs are developed and substantiated on a quarterly basis, based on current borrower developments, market conditions and collateral values. The following method is used to value impaired loans:
•	The fair value of the collateral, which may take the form of real estate or personal property, is based on internal estimates, field observations, assessments provided by third-party appraisers and other valuation models. The Company performs or reaffirms valuations of collateral-dependent impaired loans at least annually. Adjustments are made if management believes that more recent information is available and relevant with respect to the fair value of the collateral.
Real estate held for sale ("REO") - These assets are valued based on inputs such as appraisals and third-party price opinions, less estimated selling costs. Assets that are acquired through foreclosure are recorded initially at the lower of the loan balance or fair value at the date of foreclosure. After foreclosure, valuations are updated periodically, and current market conditions my require the assets to be written down further to a new cost basis.
The following method is used to value real estate held for sale:
•	When a loan is reclassified from loan status to real estate held for sale due to the Company taking possession of the collateral, a Special Credits officer, along with the Special Credits manager, obtains a valuation, which may include a third-party appraisal, which is used to establish the fair value of the underlying collateral. The determined fair value, to the extent it does not exceed the carrying value of the loan, becomes the carrying value of the REO asset. In addition to the valuations from independent third-party sources, the carrying balance of REO assets are written down once a bona fide offer is contractually accepted, through execution of a Purchase and Sale Agreement, where the accepted price is lower than the current balance of the particular REO asset. The fair value of REO assets is re-evaluated quarterly and the REO asset is adjusted to reflect the lower of cost or fair value as necessary.

Financial_Information_Washingt

Financial Information - Washington Federal, INC.	12 Months Ended
	Sep. 30, 2013
Condensed Financial Information of Parent Company Only Disclosure [Abstract]	'
Financial Information - Washington Federal, INC.	'
	FINANCIAL INFORMATION – WASHINGTON FEDERAL, INC.
	The following Washington Federal, Inc. (parent company only) financial information should be read in conjunction with the other notes to the Consolidated Financial Statements.
	Statements of Financial Condition
	September 30,	2013			2012
		(In thousands)
	Assets
	Cash	$	66,425		$	61,926
	Investment in subsidiary	1,881,458			1,846,375
	Other assets	—			1
	Total assets	$	1,947,883		$	1,908,302
	Liabilities
	Dividend payable and other liabilities	$	10,248		$	8,550
	Total liabilities	10,248			8,550
	Stockholders’ equity
	Common stock, $1.00 par value, 300,000,000 shares authorized;	$	132,573		$	129,950
	132,572,475 and 129,950,223 shares issued; 102,484,671 and 106,177,615 shares outstanding
	Paid-in capital	1,625,051			1,586,295
	Accumulated other comprehensive income, net of tax	6,378			13,306
	Treasury stock, at cost; 30,087,804 and 23,772,608 shares	(420,817		)	(310,579		)
	Retained earnings	594,450			480,780
	Total stockholders’ equity	1,937,635			1,899,752
	Total liabilities and stockholders’ equity	$	1,947,883		$	1,908,302
	Statements of Operations
	Year ended September 30,	2013			2012			2011
		(In thousands)
	Income
	Dividends from subsidiary	$	143,799		$	106,234		$	100,600
	Total Income	143,799			106,234			100,600
	Expense
	Miscellaneous	530			564			626
	Total expense	530			564			626
	Net income before equity in undistributed net income of subsidiary	143,269			105,670			99,974
	Equity in undistributed net income of subsidiary	8,045			32,513			11,167
	Income before income taxes	151,314			138,183			111,141
	Income tax benefit	191			—			—
	Net income	$	151,505		$	138,183		$	111,141
	Statements of Cash Flows	2013			2012			2011
		(In thousands)
	Cash Flows From Operating Activities
	Net income	$	151,505		$	138,183		$	111,141
	Adjustments to reconcile net income to net cash provided by operating activities
	Equity in undistributed net income of subsidiaries	(4,893		)	(32,513		)	(4,382		)
	Decrease (increase) in other assets	1			36			(37		)
	Increase in other liabilities	1,698			2,508			1,121
	Net cash provided by operating activities	148,311			108,214			107,843
	Cash Flows From Financing Activities
	Proceeds from exercise of common stock options and related tax benefit	4,261			357			1,686
	Treasury stock purchased	(110,238		)	(41,914		)	(59,680		)
	Dividends paid on common stock	(37,835		)	(32,430		)	(26,796		)
	Net cash used in financing activities	(143,812		)	(73,987		)	(84,790		)
	Increase (decrease) in cash	4,499			34,227			23,053
	Cash at beginning of year	61,926			27,699			4,646
	Cash at end of year	$	66,425		$	61,926		$	27,699

Selected_Quarterly_Financial_D

Selected Quarterly Financial Data (Unaudited)	12 Months Ended
	Sep. 30, 2013
Quarterly Financial Information Disclosure [Abstract]	'
Selected Quarterly Financial Data	'
	SELECTED QUARTERLY FINANCIAL DATA (UNAUDITED)
	The following is a summary of the unaudited interim results of operations by quarter for the years ended September 30, 2013 and 2012:
	Year Ended September 30, 2013	First			Second			Third			Fourth
		Quarter			Quarter			Quarter			Quarter
		(In thousands, except per share data)
	Interest income	$	131,309		$	126,505		$	128,176		$	130,302
	Interest expense	35,875			33,482			33,461			33,343
	Net interest income	95,434			93,023			94,715			96,959
	Provision for loan losses	3,600			—			—			(2,250		)
	Other operating income (REO expense)	1,638			2,043			5,236			11,157
	Other operating expense	38,298			41,164			41,610			43,167
	Income before income taxes	55,174			53,902			58,341			67,199
	Income taxes	19,891			17,924			21,003			24,293
	Net income	$	35,283		$	35,978		$	37,338		$	42,906
	Basic earnings per share	$	0.33		$	0.34		$	0.36		$	0.42
	Diluted earnings per share	0.33			0.34			0.36			0.41
	Cash dividends per share	0.08			0.09			0.09			0.1
	Return of average assets	1.11		%	1.1		%	1.15		%	1.32		%
	Year Ended September 30, 2012	First			Second			Third			Fourth
		Quarter			Quarter			Quarter			Quarter
		(In thousands, except per share data)
	Interest income	$	155,926		$	154,581		$	145,384		$	134,380
	Interest expense	52,212			49,979			48,849			42,209
	Net interest income	103,714			104,602			96,535			92,171
	Provision for loan losses	11,210			18,000			10,366			5,379
	Other operating income (REO expense)	(5,923		)	3,446			4,736			4,439
	Other operating expense	34,365			36,812			35,964			35,713
	Income before income taxes	52,216			53,236			54,941			55,518
	Income taxes	18,798			19,165			19,778			19,987
	Net income	$	33,418		$	34,071		$	35,163		$	35,531
	Basic earnings per share	$	0.31		$	0.32		$	0.33		$	0.33
	Diluted earnings per share	0.31			0.32			0.33			0.33
	Cash dividends per share	0.08			0.08			0.08			0.08
	Return of average assets	0.98		%	1		%	1.04		%	1.1		%

Fair_Value_Measurements

Fair Value Measurements	12 Months Ended
	Sep. 30, 2013
Fair Value Disclosures [Abstract]	'
Fair Value Measurements	'
	FAIR VALUES OF FINANCIAL INSTRUMENTS
	U.S. GAAP requires disclosure of fair value information about financial instruments, whether or not recognized on the statement of financial condition, for which it is practicable to estimate those values. Certain financial instruments and all non-financial instruments are excluded from the disclosure requirements. Accordingly, the aggregate fair value estimates presented do not reflect the underlying fair value of the Company. Although management is not aware of any factors that would materially affect the estimated fair value amounts presented, such amounts have not been comprehensively revalued for purposes of these financial statements since that date, and therefore, estimates of fair value subsequent to that date may differ significantly from the amounts presented below.
			2013				2012
		Level in Fair Value Hierarchy	Carrying		Estimated		Carrying			Estimated
			Amount		Fair Value		Amount			Fair Value
			(In thousands)
	Financial assets
	Cash and cash equivalents	1	$	203,563	$	203,563	$	751,430		$	751,430
	Available-for-sale securities:
	Equity securities	1	101,237		101,237					—
	Obligations of U.S. government	2	533,975		533,975		183,560			183,560
	Obligations of states and political subdivisions	2	22,545		22,545		24,844			24,844
	Obligations of foreign governments		—		—		—			—
	Corporate debt securities	2	452,015		452,015		403,325			403,325
	Mortgage-backed securities
	Agency pass-through certificates	2	1,251,176		1,251,176		1,169,976			1,169,976
	Other debt securities		—		—		—			—
	Total available-for-sale securities		2,360,948		2,360,948		1,781,705			1,781,705
	Held-to-maturity securities:	2
	Equity securities		—		—		—			—
	Obligations of U.S. government		—		—		—			—
	Obligations of states and political subdivisions		—		—		795			802
	Obligations of foreign governments		—		—		—			—
	Corporate debt securities		—		—		—			—
	Mortgage-backed securities
	Agency pass-through certificates		1,654,666		1,582,849		1,190,692			1,216,421
	Other debt securities		—		—		—			—
	Total held-to-maturity securities		1,654,666		1,582,849		1,191,487			1,217,223
	Loans receivable	3	7,528,030		8,070,279		7,451,998			7,949,892
	Covered loans	3	295,947		300,610		288,376			289,754
	FDIC indemnification asset	3	64,615		62,300		87,571			85,846
	FHLB stock	2	173,009		173,009		149,840			149,840
	Financial liabilities
	Customer accounts	2	9,090,271		8,585,068		8,576,618			8,406,432
	FHLB advances and other borrowings	2	1,930,000		2,064,248		1,880,000			2,110,223
	For a description of the level in fair value hierarchy under the provisions of the Fair Value Measurements and Disclosures topic of the FASB Accounting Standards Codification please see note Q.
	The following methods and assumptions were used to estimate the fair value of financial instruments:
	Cash and cash equivalents – The carrying amount of these items is a reasonable estimate of their fair value.
	Available-for-sale securities and held-to-maturity securities – Securities at fair value are priced using model pricing based on the securities' relationship to other benchmark quoted prices as provided by an independent third party and under the provisions of the Fair Value Measurements and Disclosures topic of the FASB Accounting Standards Codification are considered a Level 2 input method except for equity securities which are considered a Level 1 input method.
	Loans receivable and covered loans – For certain homogeneous categories of loans, such as fixed- and variable-rate residential mortgages, fair value is estimated for securities backed by similar loans, adjusted for differences in loan characteristics, using the same methodology described above for AFS and HTM securities. The fair value of other loan types is estimated by discounting the future cash flows and estimated prepayments using the current rates at which similar loans would be made to borrowers with similar credit ratings and for the same remaining term. Some loan types were valued at carrying value because of their floating rate or expected maturity characteristics. Net deferred loan fees are not included in the fair value calculation but are included in the carrying amount.
	FDIC indemnification asset – The fair value of the indemnification asset is estimated by discounting the expected future cash flows using the current rates .
	FHLB stock – The fair value is based upon the redemption value of the stock which equates to its carrying value.
	Customer accounts – The fair value of demand deposits, savings accounts, and money market accounts is the amount payable on demand at the reporting date. The fair value of fixed-maturity certificates of deposit is estimated by discounting the estimated future cash flows using the rates currently offered for deposits with similar remaining maturities.
	FHLB advances and other borrowings – The fair value of FHLB advances and other borrowings is estimated by discounting the estimated future cash flows using rates currently available to the Company for debt with similar remaining maturities.
	Fair Value Measurements
	U.S. GAAP defines fair value as the exchange price that would be received for an asset or paid to transfer a liability (an exit price) in the principal or most advantageous market for the asset or liability in an orderly transaction between market participants on the measurement date. U.S. GAAP also establishes a fair value hierarchy which requires an entity to maximize the use of observable inputs and minimize the use of unobservable inputs when measuring fair value. The standard describes three levels of inputs that may be used to measure fair value:
	Level 1: Quoted prices (unadjusted) for identical assets or liabilities in active exchange markets that the entity has the ability to access as of the measurement date.
	Level 2: Significant other observable inputs other than Level 1 prices, such as quoted prices for similar assets or liabilities, quoted prices in markets that are not active and other inputs that are observable or can be corroborated by observable market data.
	Level 3: Significant unobservable inputs that reflect a company’s own assumptions about the assumptions that market participants would use in pricing an asset or liability.
	We have established and documented the Company's process for determining the fair values of our assets and liabilities, where applicable. Fair value is based on quoted market prices, when available, for identical or similar assets or liabilities. In the absence of quoted market prices, fair value is determined using valuation models or third-party appraisals. The following is a description of the valuation methodologies used to measure and report the fair value of financial assets and liabilities on a recurring or nonrecurring basis:
	Measured on a Recurring Basis
	Securities
	Securities available for sale are recorded at fair value on a recurring basis. Securities at fair value are priced using model pricing based on the securities' relationship to other benchmark quoted prices as provided by an independent third party (primarily Bloomberg), and under the provisions of FASB ASC 820, Fair Value Measurement, are considered a Level 2 input method.
	The following table presents the balance of assets measured at fair value on a recurring basis at September 30, 2013:
		Fair Value at September 30, 2013
		Level 1			Level 2			Level 3				Total
		(In thousands)
	Available-for-sale securities
	Equity securities	$	101,237		$	—		$	—			$	101,237
	Obligations of U.S. government	—			533,975			—				533,975
	Obligations of states and political subdivisions	—			22,545			—				22,545
	Obligations of foreign governments	—			—			—				—
	Corporate debt securities	—			452,015			—				452,015
Agency pass through mortgage-backed securities	—			1,251,176			—				1,251,176
Other debt securities	—			—			—				—
Balance at end of period	$	101,237		$	2,259,711		$	—			$	2,360,948
There were no transfers between, into and/or out of Levels 1, 2 or 3 during the year ended September 30, 2013 other than a transfer from Level 2 to Level 1 of $511 in Equity Securities.
Measured on a Nonrecurring Basis
Impaired Loans & Real Estate Held for Sale
From time to time, and on a nonrecurring basis, fair value adjustments to collateral-dependent loans and real estate held for sale are recorded to reflect write-downs of principal balances based on the current appraised or estimated value of the collateral. When management determines that the fair value of the collateral or the real estate held for sale requires additional adjustments, either as a result of a non-current appraisal value or when there is no observable market price, the Company classifies the impaired loan or real estate held for sale as Level 3. Level 3 assets recorded at fair value on a nonrecurring basis at September 30, 2013, included loans for which a specific reserve allowance was established or a partial charge-off was recorded based on the fair value of collateral, as well as covered REO and real estate held for sale for which fair value of the properties was less than the cost basis. Real estate held for sale consists principally of properties acquired through foreclosure.
The following table presents the aggregated balance of assets measured at estimated fair value on a nonrecurring basis for the year ended September 30, 2013, and the total losses resulting from those fair value adjustments for the quarter and year ended September 30, 2013. These estimated fair values are shown gross of estimated selling costs:
	Through September 30, 2013												Quarter		Year Ended September 30, 2013
													Ended
													30-Sep-13
	Level 1			Level  2			Level  3				Total		Total Losses
	(In thousands)
Impaired loans (1)	$	—		$	—		$	87,170			$	87,170	$	366	$	13,371
Covered REO (2)	—			—			20,308				20,308		208		811
Real estate held for sale (2)	—			—			82,840				82,840		4,618		24,268
Balance at end of period	$	—		$	—		$	190,318			$	190,318	$	5,192	$	38,450
___________________
-1	The losses represents remeasurements of collateral-dependent loans.
-2	The losses represents aggregate writedowns and charge-offs on real estate held for sale.
There were no liabilities carried at fair value, measured on a recurring or nonrecurring basis, at September 30, 2013.
The following describes the process used to value Level 3 assets measured on a nonrecurring basis:
Impaired loans - The Company adjusts the carrying amount of impaired loans when there is evidence of probable loss and the expected fair value of the loan is less than its contractual amount. The amount of the impairment may be determined based on the estimated present value of future cash flows or the fair value of the underlying collateral. Impaired loans with a specific reserve allowance based on cash flow analysis or the value of the underlying collateral are classified as Level 3 assets.
The evaluations for impairment are prepared by the Problem Loan Review Committee, which is chaired by the Chief Credit Officer and includes the Loan Review manager and Special Credits manager, as well as senior credit officers, division managers and group executives, as applicable. These evaluations are performed in conjunction with the quarterly allowance for loan loss ("ALLL") process.
Applicable loans are evaluated for impairment on a quarterly basis. Loans included in the previous quarter's review are reevaluated and if their values are materially different from the prior quarter evaluation, the underlying information (loan balance and collateral value) are compared. Material differences are evaluated for reasonableness and discussions are held between the relationship manager and their division manager to understand the difference and determine if any adjustment is necessary. The inputs are developed and substantiated on a quarterly basis, based on current borrower developments, market conditions and collateral values. The following method is used to value impaired loans:
•	The fair value of the collateral, which may take the form of real estate or personal property, is based on internal estimates, field observations, assessments provided by third-party appraisers and other valuation models. The Company performs or reaffirms valuations of collateral-dependent impaired loans at least annually. Adjustments are made if management believes that more recent information is available and relevant with respect to the fair value of the collateral.
Real estate held for sale ("REO") - These assets are valued based on inputs such as appraisals and third-party price opinions, less estimated selling costs. Assets that are acquired through foreclosure are recorded initially at the lower of the loan balance or fair value at the date of foreclosure. After foreclosure, valuations are updated periodically, and current market conditions my require the assets to be written down further to a new cost basis.
The following method is used to value real estate held for sale:
•	When a loan is reclassified from loan status to real estate held for sale due to the Company taking possession of the collateral, a Special Credits officer, along with the Special Credits manager, obtains a valuation, which may include a third-party appraisal, which is used to establish the fair value of the underlying collateral. The determined fair value, to the extent it does not exceed the carrying value of the loan, becomes the carrying value of the REO asset. In addition to the valuations from independent third-party sources, the carrying balance of REO assets are written down once a bona fide offer is contractually accepted, through execution of a Purchase and Sale Agreement, where the accepted price is lower than the current balance of the particular REO asset. The fair value of REO assets is re-evaluated quarterly and the REO asset is adjusted to reflect the lower of cost or fair value as necessary.

Covered_Assets

Covered Assets	12 Months Ended
	Sep. 30, 2013
Covered Assets [Abstract]	'
Covered Assets	'
	Covered Assets
	Covered assets represent loans and real estate held for sale acquired from the FDIC that are subject to loss sharing agreements and were $326,927,000 as of September 30, 2013, versus $317,925,000 as of September 30, 2012.
	As of the close of business October 31, 2012, the Company acquired covered assets as part of the South Valley acquisition as described in Note A.
	The carrying balance of acquired covered loans have been included in the following tables. The Company evaluated the acquired loans for impairment. Loans are accounted for under FASB ASC 310-30 when there is evidence of credit deterioration since origination and for which it is probable, at acquisition, that the Company would be unable to collect all contractually required payments.
	The following table reflects the carrying value of all acquired impaired and non-impaired loans as of September 30, 2013 and 2012:
		September 30, 2013										September 30, 2012
		Acquired			Acquired			Total				Acquired			Acquired		Total
		Impaired			Non-impaired							Impaired			Non-impaired
		Loans			Loans							Loans			Loans
		(In thousands)
	Single-family residential	$	28,428		$	28,460		$	56,888			$	7,699		$	35,676	$	43,375
	Construction – speculative	440			—			440				4,519			90		4,609
	Construction – custom	1,197			—			1,197				1,196			—		1,196
	Land – acquisition & development	17,953			4,810			22,763				22,747			11,430		34,177
	Land – consumer lot loans	496			245			741				497			498		995
	Multi-family	6,933			18,852			25,785				4,698			27,645		32,343
	Commercial real estate	121,105			89,499			210,604				83,784			121,592		205,376
	Commercial & industrial	14,949			9,416			24,365				18,504			13,023		31,527
	HELOC	3,869			14,750			18,619				309			17,971		18,280
	Consumer	242			604			846				659			918		1,577
	Total covered loans	$	195,612		$	166,636		$	362,248			$	144,612		$	228,843	$	373,455
	Allowance for losses	—			—			—				—			—		—
		$	195,612		$	166,636		$	362,248			$	144,612		$	228,843	$	373,455
	Discount							(66,301		)							(85,079		)
	Covered loans, net							$	295,947								$	288,376
	Changes in the carrying amount and accretable yield for acquired impaired and non-impaired loans were as follows for the fiscal years ended September 30, 2013 and 2012:
		September 30, 2013															September 30, 2012
		Acquired Impaired								Acquired Non-impaired							Acquired Impaired						Acquired Non-impaired
		Accretable				Carrying				Accretable				Carrying			Accretable			Carrying			Accretable			Carrying
		Yield				Amount of				Yield				Amount of			Yield			Amount of			Yield			Amount of
						Loans								Loans						Loans						Loans
		(In thousands)															(In thousands)
	Balance at beginning of period	$	50,902			$	74,953			$	23,789			$	213,423		$	37,072		$	116,061		$	30,370		$	269,888
	Additions	43,299				107,946				—				—			—			—			—			—
	Reclassification from nonaccretable balance, net	17,850				—				—				—			34,690			—			—			—
	Accretion	(33,774		)		33,774				(6,526		)		6,526			(20,860		)	20,860			(6,581		)	6,581
	Transfers to REO	—				(11,196		)		—				—			—			(15,905		)	—			—
	Payments received, net	—				(67,386		)		—				(62,093		)	—			(46,063		)	—			(63,046		)
	Balance at end of period	$	78,277			$	138,091			$	17,263			$	157,856		$	50,902		$	74,953		$	23,789		$	213,423
	At September 30, 2013 and September 30, 2012, none of the acquired impaired or non-impaired loans were classified as non-performing assets. Therefore, interest income, through accretion of the difference between the carrying amount of the loans and the expected cash flows, was recognized on all acquired loans.
	The outstanding principal balance of acquired loans was $362,248,000 and $373,455,000 as of September 30, 2013 and September 30, 2012, respectively. The discount balance related to the acquired loans was $66,301,000 and $85,079,000 as of September 30, 2013 and September 30, 2012, respectively.
	The following table shows the year to date activity for the FDIC indemnification asset:
		September 30,				September 30,
		2013				2012
		(In thousands)
	Balance at beginning of period	$	87,571			$	101,634
	Additions	18,101				3,284
	Payments received	(13,421		)		(3,456		)
	Amortization	(28,722		)		(15,510		)
	Accretion	1,086				1,619
	Balance at end of period	$	64,615			$	87,571
	The following tables provide information on covered loans based on credit quality indicators (defined in Note A) as of September 30, 2013:
		Internally Assigned Grade																		Total
		Pass				Special mention				Substandard				Doubtful			Loss			Net  Loans
		(In thousands)
	Purchased non-credit impaired loans:
	Single-family residential	$	26,426			$	—			$	2,034			$	—		$	—		$	28,460
	Construction - speculative	—				—				—				—			—			—
	Construction - custom	—				—				—				—			—			—
	Land - acquisition & development	3,069				1,019				722				—			—			4,810
	Land - consumer lot loans	245				—				—				—			—			245
	Multi-family	17,217				—				1,635				—			—			18,852
	Commercial real estate	56,120				9,235				24,144				—			—			89,499
Commercial & industrial	5,175				500				3,741				—			—			9,416
HELOC	14,750				—				—				—			—			14,750
Consumer	604				—				—				—			—			604
	123,606				10,754				32,276				—			—			166,636
Total grade as a % of total net loans	74.2		%		6.4		%		19.4		%		—		%	—		%
Purchased credit impaired loans:
Pool 1 - Construction and land A&D	14,361				4,296				25,363				—			—			44,020
Pool 2 - Single-family residential	21,541				—				—				—			—			21,541
Pool 3 - Multi-family	4,131				—				1,100				—			—			5,231
Pool 4 - HELOC & other consumer	4,111				—				1,880				—			—			5,991
Pool 5 - Commercial real estate	36,494				15,113				53,946				—			—			105,553
Pool 6 - Commercial & industrial	4,265				204				8,807				—			—			13,276
	$	84,903			$	19,613			$	91,096			$	—		$	—		$	195,612
																Total covered loans			362,248
																Discount			(66,301		)
																Allowance			$	—
																Covered loans, net			$	295,947
The following table provides an analysis of the payment status of purchased non-credit impaired loans in past due status for the period ended September 30, 2013.
	Amount of  Loans				Days Delinquent Based on $ Amount of Loans																	% based
Type of Loans	Net of LIP & Chg.-Offs				Current				30				60			90			Total			on $
	(In thousands)
Single-family residential	$	28,460			$	27,411			$	78			$	—		$	971		$	1,049		3.69	%
Construction - speculative	—				—				—				—			—			—			NM
Construction - custom	—				—				—				—			—			—			NM
Land - acquisition & development	4,810				4,774				—				—			36			36			0.75	%
Land - consumer lot loans	245				199				—				—			46			46			18.78	%
Multi-family	18,852				17,511				—				—			1,341			1,341			7.11	%
Commercial real estate	89,499				84,949				2,779				455			1,316			4,550			5.08	%
Commercial & industrial	9,416				9,416				—				—			—			—			—	%
HELOC	14,750				14,334				103				74			239			416			2.82	%
Consumer	604				601				3				—			—			3			0.5	%
	$	166,636			$	159,195			$	2,963			$	529		$	3,949		$	7,441		4.47	%

Subsequent_Event

Subsequent Event	12 Months Ended
	Sep. 30, 2013
Subsequent Events [Abstract]	'
Subsequent Event	'
	Subsequent Event
	Effective July 18, 2013, the Bank entered into a series of related Purchase and Assumption Agreements for the acquisition of branches from Bank of America, National Association. These acquisitions represent a total of 51 branches located in eastern Washington, Idaho, Oregon and New Mexico with approximately $1.5 billion of deposits and $11 million of loans. A premium of 2.60% of deposits will be paid in addition to the net book value of the 51 branch properties. The purchase price remains subject to the completion of the transactions and related valuations that are expected to be completed by March 31, 2014. The New Mexico branches were converted on November 2, 2013 and the remaining branches will be converted on December 6, 2013. The combined company will have 232 offices in eight western states with total assets of approximately $15 billion and total deposits of approximately $11 billion.

Summary_of_Significant_Account1

Summary of Significant Accounting Policies (Policies)	12 Months Ended
	Sep. 30, 2013
Accounting Policies [Abstract]	'
Principles of consolidation	'
	Principles of consolidation. The consolidated financial statements include the accounts of Washington Federal, Inc. ("Company" or "Washington Federal") and its wholly owned subsidiaries. Intercompany transactions and balances have been eliminated.
Fiscal period	'
	The Company's fiscal year end is September 30th. All references to 2013, 2012 and 2011 represent balances as of September 30, 2013, September 30, 2012 and September 30, 2011, or activity for the fiscal years then ended. References to net income in this document refer to net income available to common shareholders.
Cash and cash equivalents	'
	Cash and cash equivalents. Cash and cash equivalents include cash on hand, amounts due from banks, overnight investments and repurchase agreements with an initial maturity of three months or less.
Investments and mortgage-backed securities	'
	Investments and mortgage-backed securities. The Company accounts for investments and mortgage-backed securities in two categories: held-to-maturity and available-for-sale.
	Held-to-maturity securities are accounted for at amortized cost, but the Company must have both the positive intent and the ability to hold those securities to maturity. There are very limited circumstances under which securities in the held-to-maturity category can be sold without jeopardizing the cost basis of accounting for the remainder of the securities in this category.
	Available-for-sale securities are not classified as held-to-maturity and are considered to be available-for-sale. Gains and losses realized on the sale of these securities are accounted for based on the specific identification method. Unrealized gains and losses for available-for-sale securities are excluded from earnings and reported as a net amount in the accumulated other comprehensive income component of stockholders' equity.
	Management evaluates debt and equity securities for other than temporary impairment on a quarterly basis based on the securities' current credit quality, interest rates, term to maturity and management's intent and ability to hold the securities until the net book value is recovered. Any other than temporary declines in fair value are recognized in the statements of operations.
	Realized gains and losses on securities sold as well as other than temporary impairment charges, are shown on the Consolidated Statements of Operations under the Other Income (Loss) heading.
	Premiums and discounts on investments are deferred and recognized over the life of the asset, using the effective interest method.
Loans receivable	'
	Loans receivable. Loans that are performing in accordance with their contractual terms are held at their carrying amount and expected interest is accrued. The Company also receives fees for originating loans in addition to various fees and charges related to existing loans, which may include prepayment charges, late charges and assumption fees.
	When a borrower fails to make a required payment on a loan, the Company attempts to cure the deficiency by contacting the borrower. Contact is made after a payment is 30 days past its grace period. In most cases, deficiencies are cured promptly. If the delinquency is not cured within 90 days, the Company may institute appropriate action to foreclose on the property. If foreclosed, the property is sold at a public sale and may be purchased by the Company.
	The Company will consider modifying the interest rates and terms of a loan if it determines that a modification is a better alternative to foreclosure. Most troubled debt restructured ("TDR") loans are accruing and performing loans where the borrower has proactively approached the Company about modifications due to temporary financial difficulties. Each request is individually evaluated for merit and likelihood of success. The concession for these loans is typically a payment reduction through a rate reduction of from 100 to 200 bps for a specific term, usually six to twenty-four months. Interest-only payments may also be approved during the modification period. Principal forgiveness is generally not an available option for restructured loans. Before granting approval to modify a loan in a TDR, we consider a borrower’s ability to repay by evaluating: current income levels and debt to income ratio, borrower’s credit score, payment history of the loan, and updated valuation of the secondary repayment source. The Company also modifies some loans that are not classified as TDRs as the modification is due to a restructuring where the effective interest rate on the debt is reduced to reflect a decrease in market interest rates.
	Loans are placed on nonaccrual status when, in the judgment of management, the probability of collection of interest is deemed to be insufficient to warrant further accrual. When a loan is placed on nonaccrual status, previously accrued but unpaid interest is deducted from interest income. The Company does not accrue interest on loans 90 days or more past due. If payment is made on a loan so that the loan becomes less than 90 days past due, and the Company expects full collection of principal and interest, the loan is returned to full accrual status. Any interest ultimately collected is credited to income in the period of recovery. A loan is charged-off when the loss is estimable and it is confirmed that the borrower will not be able to meet contractual obligations.
	If a consumer loan is on non-accrual status before becoming a TDR it will stay on non-accrual status following restructuring until it has been performing for at least six months, at which point it may be moved to accrual status. If a loan is on accrual status before it becomes a TDR, and we conclude full repayment is highly probable based on our internal evaluation, it will remain on accrual status following restructuring. If the homogeneous restructured loan does not perform it is placed in non-accrual status when it is 90 days delinquent.
	For commercial loans, six consecutive payments on newly restructured loan terms are required prior to returning the loan to accrual status. In some instances after the required six consecutive payments are made a management assessment will conclude that collection of the entire principal balance is still in doubt. In those instances, the loan will remain on non-accrual.
	Impaired loans consist of loans receivable that are not expected to have their principal and interest repaid in accordance with their contractual terms. This includes TDRs that are on non-accrual status. Collateral dependent impaired loans are measured using the fair value of the collateral, less selling costs. Non-collateral dependent loans are measured at the present value of expected future cash flows.
	Deferred fees and discounts on loans. Loan discounts and loan fees are deferred and recognized over the life of the loans using the effective interest method.
	Allowance for Loan Losses. The Company maintains an allowance for loan losses to absorb losses inherent in the loan portfolio. The allowance is based on ongoing, quarterly assessments of the probable and estimable losses inherent in the loan portfolio. The Company's methodology for assessing the appropriateness of the allowance consists of two components, which include the general allowance and specific allowances. The general portion of the loan loss allowance is established by applying a loss percentage factor to the different loan types. The loss percentage factor is made up of two parts - the historical loss factor (“HLF”) and the qualitative loss factor (“QLF”).
	The HLF takes into account historical charge-offs by loan type. The Company uses an average of historical loss rates for each loan category multiplied by a loss emergence period. This is the likely period of time during which a residential or commercial loan borrower experiencing financial difficulties might burn through their cash prior to becoming delinquent on their loan, plus the period of time that it takes the bank to work out the loans.
	The QLF are based on management's continuing evaluation of the pertinent factors underlying the quality of the loan portfolio, including changes in the size and composition of the loan portfolio, actual loan loss experience, current economic conditions, collateral values, geographic concentrations, seasoning of the loan portfolio, specific industry conditions, and the duration of the current business cycle. These factors are considered by loan type.
	Specific allowances are established for loans which are individually evaluated, in cases where management has identified significant conditions or circumstances related to a loan that management believes indicate the probability that a loss has been incurred.
	The recovery of the carrying value of loans is susceptible to future market conditions beyond the Company's control, which may result in losses or recoveries differing from those provided. In those cases, a portion of the allowance is then allocated to reflect the estimated loss exposure.
	Covered assets. Covered loans are the loans acquired from Horizon in 2010 and and certain loans acquired from South Valley in 2013 that are recorded at their estimated fair market value. Loans that were classified as non-performing loans by Horizon and South Valley are no longer classified as non-performing because, at acquisition, the carrying value of these loans was adjusted to reflect fair value and are covered under the FDIC loss sharing agreements. Management believes that the new book value reflects an amount that will ultimately be collected.
	Acquired credit impaired loans are accounted for under Financial Accounting Standards Board ("FASB") Accounting Standards Codification ("ASC") 310-30 when there is evidence of credit deterioration since origination and for which it is probable, at acquisition, that the Company would be unable to collect all contractually required payments. Interest income, through accretion of the difference between the carrying amount of the loans and the expected cash flows, was recognized on all acquired loans.
	Covered real estate held for sale represents the foreclosed properties that were originally Horizon loans or certain South Valley Bank loans. Covered real estate held for sale is carried at the estimated fair market value of the repossessed real estate. The covered loans and covered real estate held for sale are collectively referred to as “covered assets”.
	FDIC indemnification asset. FDIC indemnification asset is the receivable recorded from due to guarantee provided by the FDIC on the covered assets.
Client Derivatives	'
	Client Derivatives. Interest rate swap agreements are provided to certain clients who desire to convert their obligations from variable to fixed interest rates. Under these agreements, the Company enters into a variable-rate loan agreement with a customer in addition to a swap agreement, and then enters into a corresponding swap agreement with a third party in order to offset its exposure on the customer swap agreement. As the interest rate swap agreements with the customers and third parties are not designated as hedges under ASC 815, the instruments are marked to market in earnings. The change in fair value of the offsetting swaps are included in interest income and interest expense and there is no impact on net income. There is a modest fee income earned on the swaps that is included in miscellaneous loan income.
Premises and equipment	'
	Premises and equipment. Premises and equipment are stated at cost, less accumulated depreciation. Depreciation is computed on the straight-line method over the estimated useful lives of the respective assets. Expenditures are capitalized for betterments and major renewals. Charges for ordinary maintenance and repairs are expensed to operations as incurred.
Real estate held for sale	'
	Real estate held for sale. Properties acquired in settlement of loans or acquired for development are recorded at the lower of cost or fair value less selling costs. Subsequent declines in valuation are recorded as additional expense in gain (loss) on real estate acquired through foreclosure line item.
Intangible assets	'
	Intangible assets. Goodwill represents the excess of the cost of businesses acquired over the fair value of the net assets acquired. The core deposit intangibles and non-compete agreement intangible are acquired assets that lack physical substance but can be distinguished from goodwill. Goodwill is evaluated for impairment on an annual basis. Other intangible assets are amortized over their estimated lives and are subject to impairment testing when events or circumstances change. If circumstances indicate that the carrying value of the assets may not be recoverable, an impairment charge could be recorded. No impairment of intangible assets has ever been identified. The Company amortizes the core deposit intangibles on a straight line basis over their estimated lives of between 5 and 8 years.
Accounting for stock-based compensation	'
	Accounting for stock-based compensation. The Company records an expense for the estimated fair value of equity awards over the vesting period. See Note L for additional information. Stock options that were not dilutive but were outstanding as of September 30, 2013, 2012 and 2011 were 435,825, 934,880 and 2,190,123, respectively.
Use of estimates	'
	Use of estimates. The preparation of financial statements in conformity with accounting principles generally accepted in the United States of America requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosure of contingent assets and liabilities at the date of the financial statements and the reported amounts of revenues and expenses during the reporting period. Significant estimates reported in the financial statements include the allowance for loan losses, intangible assets, deferred taxes and contingent liabilities. Actual results could differ from these estimates.
New accounting pronouncements	'
	New accounting pronouncements. In December 2012, FASB issued Accounting Standards Update (“ASU”) 2012-06, Subsequent Accounting for an Indemnification Asset Recognized at the Acquisition Date as a Result of a Government-Assisted Acquisition of a Financial Institution. ASU 2012-06 clarifies that when a reporting entity recognizes an indemnification asset as a result of a government-assisted acquisition of a financial institution and there is a subsequent change in the amount of cash flows expected to be collected on the indemnified asset, the reporting entity should subsequently measure the indemnification asset on the same basis as the underlying loans by taking into account the contractual limitations of the Loss-Sharing Agreement ("LSA"). For amortization of changes in value, the reporting entity should use the term of the LSA if it is shorter than the term of the acquired loans. ASU 2012-06 is effective for interim and annual periods beginning after December 15, 2012. Early adoption is permitted. Based upon the most recent measurement of expected losses covered under loss-sharing agreements, adoption of the new guidance is not expected to have a material impact on the Company's consolidated financial results.
	In January 2013, the FASB issued ASU 2013-01, Balance Sheet (Topic 210): Clarifying the Scope of Disclosures about Offsetting Assets and Liabilities. The main objective of this Update is to address implementation issues about the scope of ASU No. 2011-11, Balance Sheet (Topic 210): Disclosures about Offsetting Assets and Liabilities. The guidance in this ASU is effective for the first interim or annual period beginning on or after January 1, 2013 and should be applied retrospectively. This new guidance did not have a material impact on the Company's consolidated financial statements.
	In February 2013, the FASB issued ASU 2013-02, Comprehensive Income (Topic 220): Reporting of Amounts Reclassified Out
	of Accumulated Other Comprehensive Income. The objective of this Update is to improve the reporting of reclassifications out
	of accumulated other comprehensive income. The amendments do not change the current requirements for reporting net income
	or other comprehensive income in financial statements; rather, they require the entity to provide information about the amounts
	reclassified out of accumulated other comprehensive income by component. The guidance in this ASU is effective for fiscal years, and interim periods within those years, beginning after December 15, 2012, and should be applied prospectively. This new guidance did not have a material impact on the Company's consolidated financial statements.
	In July 2013, the FASB issued ASU 2013-10, Derivatives and Hedging (Topic 815): Inclusion of the Fed Funds Effective Swap
	Rate (or Overnight Index Swap Rate) as a Benchmark Interest Rate for Hedge Accounting Purposes. Topic 815, Derivatives and Hedging, provides guidance on the risks that are permitted to be hedged in a fair value or cash flow hedge. The objective of this Update is to provide for the inclusion of the Fed Funds Effective Swap Rate (OIS) as a U.S. benchmark interest rate for hedge accounting purposes, in addition to UST and LIBOR rates. The guidance in this ASU is effective prospectively for qualifying new or redesignated hedging relationships entered into on or after July 17, 2013. As the Company does not currently engage in derivatives transactions that are accounted for as cash flow or fair value hedges, the adoption of this ASU is not expected to have a material impact on the Company's consolidated financial statements.
	In July 2013, the FASB issued ASU 2013-11, Income Taxes (Topic 740): Presentation of an Unrecognized Tax Benefit When a
	Net Operating Loss Carryforward, A Similar Tax Loss, or a Tax Credit Carryforward Exists. Topic 740, Income Taxes, does not
	include explicit guidance on the financial statement presentation of an unrecognized tax benefit when a net operating loss
	carryforward, a similar tax loss, or a tax credit carryforward exists. There is diversity in practice in the presentation of unrecognized tax benefits in those instances. Some entities present unrecognized tax benefits as a liability unless the unrecognized tax benefit is directly associated with a tax position taken in a tax year that results in, or that resulted in, the recognition of a net operating loss or tax credit carryforward for that year and the net operating loss or tax credit carryforward has not been utilized. Other entities present unrecognized tax benefits as a reduction of a deferred tax asset for a net operating loss or tax credit carryforward in certain circumstances. The objective of the amendments in this Update is to eliminate that diversity in practice. The amendments in this Update do not require new recurring disclosures. The guidance in this ASU is effective for fiscal years, and interim periods within those years, beginning after December 15, 2013. The amendments should be applied prospectively to all unrecognized tax benefits that exist at the effective date. Retrospective application is permitted. This new guidance is not expected to have a material impact on the Company's consolidated financial statements.
Business segments	'
	Business segments. As the Company manages its business and operations on a consolidated basis, management has determined that there is one reportable business segment.
Reclassifications	'
	Reclassifications. Reclassification of Real Estate Held for Investment into its own line item and out of Real Estate Held for Sale have been made to the financial statements for years prior to September 30, 2013 to conform to current year classifications.

Summary_of_Significant_Account2

Summary of Significant Accounting Policies (Tables)	12 Months Ended
	Sep. 30, 2013
Accounting Policies [Abstract]	'
Schedule of goodwill and intangible assets	'
	The balance of the Company's intangible assets was as follows, which includes the additional goodwill discussed above:
		Goodwill			Servicing Rights Intangible			Core Deposit Intangible			Total
		(In thousands)
	Balance at September 30, 2011	$	251,653		$	1,246		$	3,372		$	256,271
	Additions	—			—			2,022			2,022
	Amortization	—			(960		)	(1,257		)	(2,217		)
	Balance at September 30, 2012	251,653			286			4,137			256,076
	Additions	8,624			—			1,433			10,057
	Amortization	—			(286		)	(1,529		)	(1,815		)
	Balance at September 30, 2013	$	260,277		$	—		$	4,041		$	264,318
Schedule of future amortization expense	'
	The table below presents the estimated core deposit intangible asset amortization expense for the next five years:
	Year End		Expense
			(In thousands)
	2014		$	1,600
	2015		1,301
	2016		682
	2017		386
	2018		72

Investment_Securities_Tables

Investment Securities (Tables)	12 Months Ended
	Sep. 30, 2013
Investments, Debt and Equity Securities [Abstract]	'
Investments by contractual maturity date	'
	September 30,	2013
		Amortized				Gross Unrealized							Fair				Yield
		Cost				Gains				Losses			Value
		(In thousands)
	Available-for-sale securities
	U.S. government and agency securities due
	1 to 5 years	61,002				3,393				(252		)	64,143				1.98	%
	5 to 10 years	129,219				—				(1,547		)	127,672				0.86	%
	Over 10 years	344,571				—				(2,411		)	342,160				0.93	%
	Equity Securities
	1 to 5 years	500				11				—			511				2.17	%
	5 to 10 years	100,000				726				—			100,726				1.8	%
	Corporate bonds due
	Within 1 year	19,500				3				—			19,503				0.49	%
	1 to 5 years	317,190				1,980				(130		)	319,040				0.75	%
	5 to 10 years	113,060				1,180				(768		)	113,472				1.53	%
	Municipal bonds due
	Over 10 years	20,422				2,123				—			22,545				6.45	%
	Mortgage-backed securities
	Agency pass-through certificates	1,245,400				10,270				(4,494		)	1,251,176				2.18	%
		2,350,864				19,686				(9,602		)	2,360,948				1.7	%
	Held-to-maturity securities
	Mortgage-backed securities
	Agency pass-through certificates	1,654,666				3,387				(75,204		)	1,582,849				3.14	%
		1,654,666				3,387				(75,204		)	1,582,849				3.14	%
		$	4,005,530			$	23,073			$	(84,806	)	$	3,943,797			2.3	%
	September 30,	2012
		Amortized				Gross Unrealized							Fair				Yield
		Cost				Gains				Losses			Value
		(In thousands)
	Available-for-sale securities
	U.S. government and agency securities due
	Within 1 year	$	19,999			$	42			$	(6	)	$	20,035			0.57	%
	1 to 5 years	—				—				—			—				—	%
	5 to 10 years	59,300				4,225				—			63,525				2.21	%
	Over 10 years	100,000				—				—			100,000				1.05	%
	Corporate bonds due
	1 to 5 years	336,340				2,810				(61		)	339,089				0.91	%
	5 to 10 years	62,919				1,324				(7		)	64,236				2.73	%
	Municipal bonds due
	Over 10 years	20,442				4,402				—			24,844				6.45	%
	Mortgage-backed securities
	Agency pass-through certificates	1,161,668				9,358				(1,050		)	1,169,976				2.28	%
		1,760,668				22,161				(1,124		)	1,781,705				1.99	%
	Held-to-maturity securities
	Tax-exempt municipal bonds due
	Within 1 year	795				7							802				5.8	%
	Mortgage-backed securities
	Agency pass-through certificates	1,190,692				25,729				—			1,216,421				3.1	%
		1,191,487				25,736				—			1,217,223				3.1	%
		$	2,952,155			$	47,897			$	(1,124	)	$	2,998,928			2.44	%
Schedule of unrealized losses and fair value of securities	'
	The following table shows the unrealized gross losses and fair value of securities at September 30, 2013, by length of time that individual securities in each category have been in a continuous loss position. The Company had $190 million securities in a continuous loss position for 12 or more months at September 30, 2013, which consisted of corporate bonds, U.S. government and agency securities, and mortgage-backed securities. Management believes that the declines in fair value of these investments are not an other than temporary impairment.
	As of September 30,	2013
		Less than 12 months						12 months or more					Total
		Unrealized			Fair			Unrealized			Fair		Unrealized			Fair
		Gross Losses			Value			Gross Losses			Value		Gross Losses			Value
		(In thousands)
	Corporate Bonds	$	(660	)	$	52,434		$	(238	)	$	9,763	$	(898	)	$	62,197
	U.S. agency securities	(4,144		)	309,109			(66		)	14,091		(4,210		)	323,200
	Agency pass-through certificates	(78,291		)	1,703,948			(1,407		)	166,503		(79,698		)	1,870,451
		$	(83,095	)	$	2,065,491		$	(1,711	)	$	190,357	$	(84,806	)	$	2,255,848

Loans_Receivable_excluding_Cov1

Loans Receivable (excluding Covered Loans) (Tables)	12 Months Ended
	Sep. 30, 2013
Receivables [Abstract]	'
Schedule of loans receivable (excluding covered loans)	'
		September 30, 2013							September 30, 2012
		(In thousands)							(In thousands)
	Non-acquired loans
	Single-family residential	$	5,359,149			67.1	%		$	5,778,922			73.5	%
	Construction - speculative	130,778				1.6			129,637				1.6
	Construction - custom	302,722				3.8			211,690				2.7
	Land - acquisition & development	77,775				1.1			124,677				1.6
	Land - consumer lot loans	121,671				1.5			141,844				1.8
	Multi-family	831,684				10.4			710,140				9
	Commercial real estate	414,961				5.1			319,210				4.1
	Commercial & industrial	243,199				3			162,823				2.1
	HELOC	112,186				1.4			112,902				1.4
	Consumer	47,141				0.6			63,374				0.8
	Total non-acquired loans	7,641,266				95.6			7,755,219				98.6
	Acquired loans
	Single-family residential	$	14,468			0.2	%		$	—			—	%
	Construction - speculative	—				—			—				—
	Construction - custom	—				—			—				—
	Land - acquisition & development	1,489				—			—				—
	Land - consumer lot loans	3,313				—			—				—
	Multi-family	3,914				0.1			—				—
	Commercial real estate	133,423				1.7			—				—
	Commercial & industrial	75,326				0.9			—				—
	HELOC	10,179				0.1			—				—
	Consumer	8,267				0.1			—				—
	Total acquired loans	250,379				3.1			—				—
	Credit-impaired acquired loans
	Single-family residential	333				—			342				—
	Construction - speculative	—				—			1,889				—
	Construction - custom	—				—			—				—
	Land - acquisition & development	2,396				—			3,702				0.1
	Land - consumer lot loans	—				—			—				—
	Multi-family	—				—			601				—
	Commercial real estate	76,909				1.1			87,154				1.1
	Commercial & industrial	7,925				0.1			3,292				—
	HELOC	11,266				0.1			14,040				0.2
	Consumer	71				—			97				—
	Total credit-impaired acquired loans	98,900				1.3			111,117				1.4
	Total loans
	Single-family residential	5,373,950				67.3			5,779,264				73.5
	Construction - speculative	130,778				1.6			131,526				1.6
	Construction - custom	302,722				3.8			211,690				2.7
	Land - acquisition & development	81,660				1.1			128,379				1.7
	Land - consumer lot loans	124,984				1.5			141,844				1.8
	Multi-family	835,598				10.5			710,741				9
	Commercial real estate	625,293				7.9			406,364				5.2
	Commercial & industrial	326,450				4			166,115				2.1
	HELOC	133,631				1.6			126,942				1.6
	Consumer	55,479				0.7			63,471				0.8
	Total loans	7,990,545				100	%		7,866,336				100	%
	Less:
	Allowance for probable losses	116,741							133,147
	Loans in process	275,577							213,286
	Discount on acquired loans	34,143							33,484
	Deferred net origination fees	36,054							34,421
		462,515							414,338
		$	7,528,030						$	7,451,998
Schedule of fixed and adjustable rate loans	'
	The Company originates fixed and adjustable interest rate loans, which at September 30, 2013 consisted of the following:
	Fixed-Rate					Adjustable-Rate
	Term To Maturity	Book Value				Term To Rate Adjustment	Book Value
		(In thousands)					(In thousands)
	Within 1 year	$	482,270			Less than 1 year	$	175,614
	1 to 3 years	283,166				1 to 3 years	209,288
	3 to 5 years	255,617				3 to 5 years	168,765
	5 to 10 years	223,719				5 to 10 years	818,834
	10 to 20 years	859,412				10 to 20 years	93,533
	Over 20 years	3,977,904				Over 20 years	442,423
		$	6,082,088				$	1,908,457
Schedule of loans receivable by geographic area	'
	Gross loans by geographic concentration were as follows:
	September 30, 2013	Single -			Multi-			Land -			Land -			Construction - custom			Construction - speculative			Commercial			Commercial		Consumer		HELOC			Total
		family			family			A & D			lot loans									real estate			and industrial
		residential
		(In thousands)
	Washington	$	2,576,400		$	285,314		$	39,355		$	65,131		$	177,062		$	66,543		$	286,676		$	210,665	$	45,313	$	71,382		$	3,823,841
	Oregon	806,160			284,959			6,614			24,185			44,075			27,620			158,062			98,541		7,646		17,280			1,475,142
	Arizona	579,291			123,181			12,801			11,991			30,536			11,098			95,834			2,736		180		19,731			887,379
	Utah	435,250			55,930			9,491			6,489			26,433			5,955			—			636		45		6,676			546,905
	Idaho	329,299			27,029			2,685			11,602			10,917			9,818			1,417			192		13		4,748			397,720
	New Mexico	176,915			40,236			9,099			3,628			7,118			9,016			66,662			7,278		1,367		13,596			334,915
	Other	233,725			2,110			—			—			—			—			4,516			5,118		848		41			246,358
	Texas	137,628			13,809			1,615			948			3,411			728			10,131			1,253		42		—			169,565
	Nevada	99,282			3,030			—			1,010			3,170			—			1,995			31		25		177			108,720
		$	5,373,950		$	835,598		$	81,660		$	124,984		$	302,722		$	130,778		$	625,293		$	326,450	$	55,479	$	133,631		$	7,990,545
	Percentage by geographic area
	September 30, 2013	Single -		Multi-		Land -		Land -		Construction - custom		Construction - speculative		Commercial		Commercial		Consumer		HELOC		Total
		family		family		A & D		lot loans						real estate		and industrial
		residential
		As % of total gross loans
	Washington	32.9	%	3.6	%	0.5	%	0.8	%	2.2	%	0.8	%	3.6	%	2.6	%	0.6	%	0.9	%	48.5	%
	Oregon	10.1		3.6		0.1		0.3		0.6		0.3		2		1.2		0.1		0.2		18.5
	Arizona	7.2		1.5		0.2		0.2		0.4		0.1		1.2		—		—		0.2		11
	Utah	5.4		0.7		0.1		0.1		0.3		0.1		—		—		—		0.1		6.8
	Idaho	4.1		0.3		—		0.1		0.1		0.1		—		—		—		0.1		4.8
	New Mexico	2.2		0.5		0.1		—		0.1		0.1		0.8		0.1		—		0.2		4.1
	Other	2.9		—		—		—		—		—		0.1		0.1		—		—		3.1
	Texas	1.7		0.2		—		—		—		—		0.1		—		—		—		2
	Nevada	1.2		—		—		—		—		—		—		—		—		—		1.2
		67.7	%	10.4	%	1	%	1.5	%	3.7	%	1.5	%	7.8	%	4	%	0.7	%	1.7	%	100	%
	Percentage by geographic area as a % of each loan type
	September 30, 2013	Single -		Multi-		Land -		Land -		Construction - custom		Construction - speculative		Commercial		Commercial		Consumer		HELOC
		family		family		A & D		lot loans						real estate		and industrial
		residential
	As % of total gross loans
	Washington	48	%	34.1	%	48.2	%	52	%	58.5	%	50.8	%	45.9	%	64.5	%	81.7	%	53.4	%
	Oregon	15		34.1		8.1		19.4		14.6		21.1		25.3		30.2		13.8		12.9
	Arizona	10.8		14.7		15.7		9.6		10.1		8.5		15.3		0.8		0.3		14.8
	Utah	8.1		6.7		11.6		5.2		8.7		4.6		—		0.2		0.1		5
	Idaho	6.1		3.2		3.3		9.3		3.6		7.5		0.2		0.1		—		3.6
	New Mexico	3.3		4.8		11.1		2.9		2.4		6.9		10.7		2.2		2.5		10.2
	Other	4.3		0.3		—		—		—		—		0.7		1.6		1.5		—
	Texas	2.6		1.7		2		0.8		1.1		0.6		1.6		0.4		0.1		—
	Nevada	1.8		0.4		—		0.8		1		—		0.3		—		—		0.1
		100	%	100	%	100	%	100	%	100	%	100	%	100	%	100	%	100	%	100	%
Schedule of impaired loans, loan commitments and loans serviced	'
	The following table provides additional information on impaired loans, loan commitments and loans serviced for others:
		September 30, 2013				September 30, 2012
		(In thousands)
	Recorded investment in impaired loans	$	454,557			$	565,553
	Troubled Debt Restructuring included in impaired loans	415,696				433,278
	Impaired loans with allocated reserves	6,035				44,167
	Reserves on impaired loans	3,473				15,983
	Average balance of impaired loans	495,472				523,363
	Interest income from impaired loans	24,798				28,366
	Outstanding fixed-rate origination commitments	190,363				151,990
	Loans serviced for others	55,589				58,673
Schedule of loan modifications	'
	The following tables provides information related to loans that were restructured during the period ending:
		September 30, 2013											September 30, 2012
					Pre-Modification				Post-Modification							Pre-Modification				Post-Modification
					Outstanding				Outstanding							Outstanding				Outstanding
		Number of			Recorded				Recorded				Number of			Recorded				Recorded
		Contracts			Investment				Investment				Contracts			Investment				Investment
					(In thousands)											(In thousands)
	Troubled Debt Restructurings:
	Single-Family Residential	406			$	105,551			$	105,551			787			$	183,548			$	183,548
	Construction - Speculative	1			2,470				2,470				24			6,703				6,703
	Construction - Custom	—			—				—				1			1,196				1,196
	Land - Acquisition & Development	1			461				461				26			5,489				5,489
	Land - Consumer Lot Loans	25			3,134				3,134				38			5,237				5,237
	Multi-Family	1			36				36				4			3,104				3,104
	Commercial Real Estate	15			11,523				11,523				4			6,224				6,224
	Commercial & Industrial	1			56				56				—			—				—
	HELOC	1			199				199				5			707				707
	Consumer	2			33				33				—			—				—
		453			$	123,463			$	123,463			889			$	212,208			$	212,208
		September 30, 2013							September 30, 2012
		Number of			Recorded				Number of			Recorded
		Contracts			Investment				Contracts			Investment
					(In thousands)							(In thousands)
	Troubled Debt Restructurings That Subsequently Defaulted:
	Single-Family Residential	78			$	17,120			123			$	24,431
	Construction - Speculative	—			—				—			—
	Construction - Custom	—			—				—			—
	Land - Acquisition & Development	—			—				—			—
	Land - Consumer Lot Loans	2			237				12			1,402
	Multi-Family	—			—				—			—
	Commercial Real Estate	2			2,703				—			—
	Commercial & Industrial	—			—				—			—
	HELOC	1			79				—			—
	Consumer	—			—				—			—
		83			$	20,139			135			$	25,833
Non accrual loans held by the company	'
	The following table sets forth information regarding non-accrual loans held by the Company:
		September 30, 2013							September 30, 2012
		(In thousands)							(In thousands)
	Non-accrual loans:
	Single-family residential	$	100,460			76.5	%		$	131,193			75.7	%
	Construction - speculative	4,560				3.5			10,634				6.1
	Construction - custom	—				—			539				0.3
	Land - acquisition & development	2,903				2.2			13,477				7.8
	Land - consumer lot loans	3,337				2.5			5,149				3
	Multi-family	6,573				5			4,185				2.4
	Commercial real estate	11,736				8.9			7,653				4.4
	Commercial & industrial	477				0.4			16				—
	HELOC	263				0.2			198				0.1
	Consumer	990				0.8			383				0.2
	Total non-accrual loans	$	131,299			100	%		$	173,427			100	%
Aging of past due loans	'
	The following tables provide an analysis of the age of loans in past due status:
	September 30, 2013	Amount of Loans				Days Delinquent Based on $ Amount of Loans																			% based
	Type of Loan	Net of LIP & Chg.-Offs				Current				30				60				90				Total			on $
		(In thousands)
	Non-acquired loans
	Single-Family Residential	$	5,356,200			$	5,237,413			$	26,888			$	12,373			$	79,526			$	118,787		2.22	%
	Construction - Speculative	82,422				80,047				—				—				2,375				2,375			2.88
	Construction - Custom	130,095				129,678				417				—				—				417			0.32
	Land - Acquisition & Development	71,567				70,106				—				—				1,461				1,461			2.04
	Land - Consumer Lot Loans	121,473				117,076				806				355				3,236				4,397			3.62
	Multi-Family	790,564				785,793				—				—				4,771				4,771			0.6
	Commercial Real Estate	404,680				398,114				2,942				351				3,273				6,566			1.62
	Commercial & Industrial	249,405				249,363				42				—				—				42			0.02
	HELOC	112,186				111,407				493				213				73				779			0.69
	Consumer	47,142				45,620				849				283				390				1,522			3.23
	Total non-acquired loans	7,365,734				7,224,617				32,437				13,575				95,105				141,117			1.92	%
	Acquired loans
	Single-Family Residential	$	14,468			$	14,343			$	82			$	—			$	43			$	125		0.86	%
	Construction - Speculative	—				—				—				—				—				—			NM
	Construction - Custom	—				—				—				—				—				—			NM
	Land - Acquisition & Development	1,489				1,241				—				—				248				248			16.66
	Land - Consumer Lot Loans	3,313				2,987				125				100				101				326			9.84
	Multi-Family	3,914				3,914				—				—				—				—			—
	Commercial Real Estate	133,398				128,610				134				617				4,037				4,788			3.59
	Commercial & Industrial	75,323				74,992				10				153				168				331			0.44
	HELOC	10,179				10,063				—				16				100				116			1.14
	Consumer	8,266				7,568				90				8				600				698			8.44
	Total acquired loans	250,350				243,718				441				894				5,297				6,632			2.65	%
	Credit-impaired acquired loans
	Single-Family Residential	333				333				—				—				—				—			—	%
	Construction - Speculative	—				—				—				—				—				—			—
	Construction - Custom	—				—				—				—				—				—			—
	Land - Acquisition & Development	2,393				1,929				—				464				—				464			19.39
	Land - Consumer Lot Loans	—				—				—				—				—				—			—
	Multi-Family	—				—				—				—				—				—			—
	Commercial Real Estate	83,116				80,095				2,301				—				720				3,021			3.63
	Commercial & Industrial	1,705				1,396				—				—				309				309			18.12
	HELOC	11,266				11,176				—				—				90				90			0.8
	Consumer	71				71				—				—				—				—			—
	Total credit-impaired acquired loans	98,884				95,000				2,301				464				1,119				3,884			3.93	%
	Total loans	$	7,714,968			$	7,563,335			$	35,179			$	14,933			$	101,521			$	151,633		1.97	%
Schedule of changes in the accretable yield for credit impaired acquired loans	'
	The following table shows the changes in accretable yield for acquired impaired loans and acquired non-impaired loans for the years ended September 30, 2013 and 2012:
		30-Sep-13																30-Sep-12
		Acquired Impaired								Acquired Non-impaired								Acquired Impaired							Acquired Non-impaired
		Accretable				Carrying				Accretable				Carrying				Accretable				Carrying			Accretable			Carrying
		Yield				Amount of				Yield				Amount of				Yield				Amount of			Yield			Amount of
						Loans								Loans								Loans						Loans
		(In thousands)																(In thousands)
	Balance at beginning of period	$	16,928			$	77,613			$	—			$	—			—				—			$	—		$	—
	Additions	—				9,865				10,804				351,335				21,384				93,691			—			—
	Reclassification from nonaccretable balance, net	30,026				—				—				—				—				—			—			—
	Accretion	(9,718		)		9,718				(5,827		)		5,827				(4,456		)		4,456			—			—
	Transfers to REO	—				(3,975		)		—				(7,755		)		—				(2,616		)	—			—
	Payments received, net	—				(23,503		)		—				(104,034		)		—				(17,918		)	—			—
	Balance at end of period	$	37,236			$	69,718			$	4,977			$	245,373			$	16,928			$	77,613		$	—		$	—
Schedule of loans Acquired, probable payments not collected	'
	There were $9.9 million in loans acquired during Fiscal 2013 as part of the South Valley Bank acquisition for which it was probable at acquisition that all contractually required payments would not be collected. The timing and amount of future cash flows cannot be reasonable estimated; therefore, these loan are accounted for on a cash basis. The following table shows loans that were acquired during Fiscal 2012 as part of the Western National Bank acquisition and are accounted for under FASB ASC 310-30:
		Western National Bank
		16-Dec-11
	Contractually required payments of interest and principal	$	171,515
	Nonaccretable difference	(56,440		)
	Cash flows expected to be collected (1)	115,075
	Accretable yield	(21,384		)
	Carrying value of acquired loans	$	93,691
	(1) Represents undiscounted expected principal and interest cash flows

Allowance_for_Losses_on_Loans_

Allowance for Losses on Loans (Tables)	12 Months Ended
	Sep. 30, 2013
Receivables [Abstract]	'
Summary of activity in allowance for loan losses	'
	The following table summarizes the activity in the allowance for loan losses for the twelve months ended September 30, 2013 and 2012:
	September 30, 2013	Beginning			Charge-offs				Recoveries				Provision &				Ending
		Allowance											Transfers				Allowance
		(In thousands)
	Single-family residential	$	81,815		$	(20,947	)		$	9,416			$	(6,100	)		$	64,184
	Construction - speculative	12,060			(1,446		)		501				(2,708		)		8,407
	Construction - custom	347			(481		)		—				1,016				882
	Land - acquisition & development	15,598			(3,983		)		4,105				(6,555		)		9,165
	Land - consumer lot loans	4,937			(1,363		)		40				(62		)		3,552
	Multi-family	5,280			(1,043		)		171				(592		)		3,816
	Commercial real estate	1,956			(747		)		17				4,369				5,595
	Commercial & industrial	7,626			(1,145		)		95				10,038				16,614
	HELOC	965			(163		)		—				200				1,002
	Consumer	2,563			(2,783		)		2,000				1,744				3,524
		$	133,147		$	(34,101	)		$	16,345			$	1,350			$	116,741
	September 30, 2012	Beginning			Charge-offs				Recoveries				Provision &				Ending
		Allowance											Transfers				Allowance
		(In thousands)
	Single-family residential	$	83,307		$	(53,789	)		$	8,164			$	44,133			$	81,815
	Construction - speculative	13,828			(4,916		)		711				2,437				12,060
	Construction - custom	623			—				—				(276		)		347
	Land - acquisition & development	32,719			(16,978		)		1,341				(1,484		)		15,598
	Land - consumer lot loans	5,520			(2,670		)		—				2,087				4,937
	Multi-family	7,623			(1,393		)		504				(1,454		)		5,280
	Commercial real estate	4,331			(814		)		225				(1,786		)		1,956
	Commercial & industrial	5,099			(249		)		2,366				410				7,626
	HELOC	1,139			(232		)		66				(8		)		965
	Consumer	2,971			(3,538		)		1,480				1,650				2,563
		$	157,160		$	(84,579	)		$	14,857			$	45,709			$	133,147
Summary of loans collectively and individually evaluated for impairment and related allocation of reserves	'
	The following tables show a summary of loans collectively and individually evaluated for impairment and the related allocation of general and specific reserves as of September 30, 2013 and 2012:
	September 30, 2013	Loans Collectively Evaluated for Impairment										Loans Individually Evaluated for Impairment
		General  Reserve			Gross Loans Subject  to				Ratio			Specific  Reserve				Gross Loans Subject  to				Ratio
		Allocation			General Reserve (1)							Allocation				Specific Reserve (1)
		(In thousands)										(In thousands)
	Single-family residential	$	64,184		$	5,262,159			1.2	%		$	—			$	96,989			—	%
	Construction - speculative	7,307			115,554				6.3			1,100				15,224				7.2
	Construction - custom	882			302,722				0.3			—				—				—
	Land - acquisition & development	6,943			67,521				10.3			2,222				10,254				21.7
	Land - consumer lot loans	3,506			107,216				3.3			46				14,455				0.3
	Multi-family	3,711			824,279				0.5			105				7,405				1.4
	Commercial real estate	5,595			400,789				1.4			—				14,172				—
	Commercial & industrial	16,614			256,954				6.5			—				48				—
	HELOC	1,002			111,169				0.9			—				1,017				—
	Consumer	3,524			47,141				7.5			—				—				—
		$	113,268		$	7,495,504			1.5	%		$	3,473			$	159,564			2.2	%
	___________________
	-1	Excludes acquired loans with discounts sufficient to absorb potential losses and covered loans
	September 30, 2012	Loans Collectively Evaluated for Impairment										Loans Individually Evaluated for Impairment
		General  Reserve			Gross Loans Subject  to				Ratio			Specific  Reserve				Gross Loans Subject  to				Ratio
		Allocation			General Reserve (1)							Allocation				Specific Reserve (1)
		(In thousands)										(In thousands)
	Single-family residential	$	81,737		$	5,694,337			1.4	%		$	78			$	84,584			0.1	%
	Construction - speculative	9,079			104,312				8.7			2,981				25,325				11.8
	Construction - custom	347			211,690				0.2			—				—				—
	Land - acquisition & development	6,697			47,294				14.2			8,901				77,383				11.5
	Land - consumer lot loans	4,176			138,666				3			761				3,178				23.9
	Multi-family	2,818			694,140				0.4			2,462				16,000				15.4
	Commercial real estate	1,158			292,550				0.4			798				26,660				3
	Commercial & industrial	7,624			161,689				4.7			2				1,134				0.2
	HELOC	965			112,812				0.9			—				90				—
	Consumer	2,563			63,374				4			—				—				—
		$	117,164		$	7,520,864			1.6	%		$	15,983			$	234,354			6.8	%
	___________________
	-1	Excludes acquired loans and covered loans
Summary of loans based on credit quality indicators	'
	The following tables provide information on loans based on credit quality indicators (defined above) as of September 30, 2013 and 2012:
	September 30, 2013	Internally Assigned Grade																			Total
		Pass			Special mention				Substandard				Doubtful				Loss				Gross Loans
		(In thousands)
	Non-acquired loans
	Single-family residential	$	5,184,101		$	4,595			$	170,453			$	—			$	—			$	5,359,149
	Construction - speculative	99,436			3,199				28,143				—				—				130,778
	Construction - custom	302,722			—				—				—				—				302,722
	Land - acquisition & development	64,355			775				12,645				—				—				77,775
	Land - consumer lot loans	121,039			—				632				—				—				121,671
	Multi-family	819,911			2,114				9,659				—				—				831,684
	Commercial real estate	373,012			21,652				20,297				—				—				414,961
	Commercial & industrial	240,441			1,049				1,709				—				—				243,199
	HELOC	112,186			—				—				—				—				112,186
	Consumer	46,720			—				421				—				—				47,141
		$	7,363,923		$	33,384			$	243,959			$	—			$	—			$	7,641,266
	Acquired loans
	Single-family residential	$	14,468		$	—			$	—			$	—			$	—			$	14,468
	Construction - speculative	—			—				—				—				—				—
	Construction - custom	—			—				—				—				—				—
	Land - acquisition & development	312			—				1,177				—				—				1,489
	Land - consumer lot loans	3,313			—				—				—				—				3,313
	Multi-family	3,227			—				687				—				—				3,914
	Commercial real estate	105,055			4,190				24,178				—				—				133,423
	Commercial & industrial	64,933			1,309				9,084				—				—				75,326
	HELOC	10,179			—				—				—				—				10,179
	Consumer	8,267			—				—				—				—				8,267
		$	209,754		$	5,499			$	35,126			$	—			$	—			$	250,379
	Credit impaired acquired loans
	Pool 1 - Construction and land A&D	$	980		$	461			$	955			$	—			$	—			$	2,396
	Pool 2 - Single-family residential	333			—				—				—				—				333
	Pool 3 - Multi-family	—			—				—				—				—				—
	Pool 4 - HELOC & other consumer	11,337			—				—				—				—				11,337
	Pool 5 - Commercial real estate	52,509			3,155				21,245				—				—				76,909
	Pool 6 - Commercial & industrial	881			—				7,044				—				—				7,925
	Total credit impaired acquired loans	$	66,040		$	3,616			$	29,244			$	—			$	—			$	98,900
	Total gross loans	$	7,639,717		$	42,499			$	308,329			$	—			$	—			$	7,990,545
	Total grade as a % of total gross loans	95.6		%	0.5		%		3.9		%		—		%		—		%
	September 30, 2012	Internally Assigned Grade																			Total
		Pass			Special mention				Substandard				Doubtful				Loss				Gross Loans
		(In thousands)
	Non-acquired loans
	Single-family residential	$	5,588,252		$	844			$	189,826			$	—			$	—			$	5,778,922
	Construction - speculative	86,126			10,113				33,398				—				—				129,637
	Construction - custom	211,690			—				—				—				—				211,690
	Land - acquisition & development	73,661			4,637				46,379				—				—				124,677
	Land - consumer lot loans	140,006			223				1,615				—				—				141,844
	Multi-family	684,649			5,098				20,393				—				—				710,140
	Commercial real estate	278,022			16,282				24,906				—				—				319,210
	Commercial & industrial	158,421			1,071				3,331				—				—				162,823
	HELOC	112,902			—				—				—				—				112,902
	Consumer	62,611			354				409				—				—				63,374
		$	7,396,340		$	38,622			$	320,257			$	—			$	—			$	7,755,219
	Acquired loans
	Single-family residential	$	—		$	—			$	—			$	—			$	—			$	—
	Construction - speculative	—			—				—				—				—				—
	Construction - custom	—			—				—				—				—				—
	Land - acquisition & development	—			—				—				—				—				—
	Land - consumer lot loans	—			—				—				—				—				—
	Multi-family	—			—				—				—				—				—
	Commercial real estate	—			—				—				—				—				—
	Commercial & industrial	—			—				—				—				—				—
	HELOC	—			—				—				—				—				—
Consumer	—			—				—				—				—				—
	$	—		$	—			$	—			$	—			$	—			$	—
Credit impaired acquired loans
Pool 1 - Construction and land A&D	$	2,466		$	—			$	3,125			$	—			$	—			$	5,591
Pool 2 - Single-family residential	342			—				—				—				—				342
Pool 3 - Multi-family	—			—				601				—				—				601
Pool 4 - HELOC & other consumer	14,137			—				—				—				—				14,137
Pool 5 - Commercial real estate	53,683			4,308				28,200				963				—				87,154
Pool 6 - Commercial & industrial	1,566			58				733				935				—				3,292
Total credit impaired acquired loans	$	72,194		$	4,366			$	32,659			$	1,898			$	—			$	111,117
Total gross loans	$	7,468,534		$	42,988			$	352,916			$	1,898			$	—			$	7,866,336
Total grade as a % of total gross loans	94.9		%	0.6		%		4.5		%		—		%		—		%
The following tables provide information on covered loans based on credit quality indicators (defined in Note A) as of September 30, 2013:
	Internally Assigned Grade																			Total
	Pass			Special mention				Substandard				Doubtful				Loss				Net  Loans
	(In thousands)
Purchased non-credit impaired loans:
Single-family residential	$	26,426		$	—			$	2,034			$	—			$	—			$	28,460
Construction - speculative	—			—				—				—				—				—
Construction - custom	—			—				—				—				—				—
Land - acquisition & development	3,069			1,019				722				—				—				4,810
Land - consumer lot loans	245			—				—				—				—				245
Multi-family	17,217			—				1,635				—				—				18,852
Commercial real estate	56,120			9,235				24,144				—				—				89,499
Commercial & industrial	5,175			500				3,741				—				—				9,416
HELOC	14,750			—				—				—				—				14,750
Consumer	604			—				—				—				—				604
	123,606			10,754				32,276				—				—				166,636
Total grade as a % of total net loans	74.2		%	6.4		%		19.4		%		—		%		—		%
Purchased credit impaired loans:
Pool 1 - Construction and land A&D	14,361			4,296				25,363				—				—				44,020
Pool 2 - Single-family residential	21,541			—				—				—				—				21,541
Pool 3 - Multi-family	4,131			—				1,100				—				—				5,231
Pool 4 - HELOC & other consumer	4,111			—				1,880				—				—				5,991
Pool 5 - Commercial real estate	36,494			15,113				53,946				—				—				105,553
Pool 6 - Commercial & industrial	4,265			204				8,807				—				—				13,276
	$	84,903		$	19,613			$	91,096			$	—			$	—			$	195,612
																Total covered loans				362,248
																Discount				(66,301		)
																Allowance				$	—
																Covered loans, net				$	295,947
Schedule of Credit Risk Profile by Payment Activity	'
	The following tables provide information on non-acquired loans based on payment activity as of September 30, 2013 and 2012:
	September 30, 2013	Performing Loans						Non-Performing Loans
		Amount			% of Total			Amount				% of Total
					Gross  Loans							Gross  Loans
		(In thousands)						(In thousands)
	Single-family residential	$	5,258,688		98.1	%		$	100,460			1.9	%
	Construction - speculative	126,218			96.5			4,560				3.5
	Construction - custom	302,722			100			—				—
	Land - acquisition & development	74,872			96.3			2,903				3.7
	Land - consumer lot loans	118,334			97.3			3,337				2.7
	Multi-family	825,111			99.2			6,573				0.8
	Commercial real estate	389,423			97.1			11,736				2.9
	Commercial & industrial	256,525			99.8			477				0.2
	HELOC	111,923			99.8			263				0.2
	Consumer	46,151			97.9			990				2.1
		$	7,509,967		98.3	%		$	131,299			1.7	%
	September 30, 2012	Performing Loans						Non-Performing Loans
		Amount			% of Total			Amount				% of Total
					Gross  Loans							Gross  Loans
		(In thousands)						(In thousands)
	Single-family residential	$	5,647,729		97.7	%		$	131,193			2.3	%
	Construction - speculative	119,003			91.8			10,634				8.2
	Construction - custom	211,151			99.7			539				0.3
	Land - acquisition & development	111,200			89.2			13,477				10.8
	Land - consumer lot loans	136,695			96.4			5,149				3.6
	Multi-family	705,955			99.4			4,185				0.6
	Commercial real estate	311,557			97.6			7,653				2.4
	Commercial & industrial	162,807			100			16				—
	HELOC	112,704			99.8			198				0.2
	Consumer	62,991			99.4			383				0.6
		$	7,581,792		97.8	%		$	173,427			2.2	%
Summary of impaired loans based on type	'
	The following tables provide information on impaired loans based on loan types as of September 30, 2013 and 2012:
	September 30, 2013	Recorded			Unpaid				Related				Average
		Investment			Principal				Allowance				Recorded
					Balance								Investment
		(In thousands)
	With no related allowance recorded:
	Single-family residential	$	33,883		$	38,928			$	—			$	21,458
	Construction - speculative	3,891			4,099				—				3,339
	Construction - custom	—			—				—				—
	Land - acquisition & development	3,020			10,705				—				2,548
	Land - consumer lot loans	3,186			3,376				—				1,839
	Multi-family	4,929			4,929				—				1,734
	Commercial real estate	23,537			31,876				—				9,651
	Commercial & industrial	7,279			31,197				—				3,123
	HELOC	446			946				—				133
	Consumer	601			618				—				127
		80,772			126,674				—				43,952
	With an allowance recorded:
	Single-family residential	335,140			341,910				15,137				330,407
	Construction - speculative	8,892			9,342				1,100				12,362
	Construction - custom	—			—				—				—
	Land - acquisition & development	2,598			4,002				—				8,315
	Land - consumer lot loans	12,631			13,014				2,222				12,301
	Multi-family	5,958			6,178				46				7,731
	Commercial real estate	7,539			8,476				105				9,321
	Commercial & industrial	56			56				—				11
	HELOC	938			938				—				858
	Consumer	33			33				—				9
		373,785			383,949				18,610			-1	381,315
	Total:
	Single-family residential	369,023			380,838				15,137				351,865
	Construction - speculative	12,783			13,441				1,100				15,701
	Construction - custom	—			—				—				—
	Land - acquisition & development	5,618			14,707				—				10,863
	Land - consumer lot loans	15,817			16,390				2,222				14,140
	Multi-family	10,887			11,107				46				9,465
	Commercial real estate	31,076			40,352				105				18,972
	Commercial & industrial	7,335			31,253				—				3,134
	HELOC	1,384			1,884				—				991
	Consumer	634			651				—				136
		$	454,557		$	510,623			$	18,610		-1	$	425,267
	____________________
	-1	Includes $3,473,000 of specific reserves and $15,137,000 included in the general reserves.
	September 30, 2012	Recorded			Unpaid				Related				Average
		Investment			Principal				Allowance				Recorded
					Balance								Investment
		(In thousands)
	With no related allowance recorded:
	Single-family residential	$	106,955		$	124,342			$	—			$	49,524
	Construction - speculative	13,726			16,568				—				13,581
	Construction - custom	—			—				—				—
	Land - acquisition & development	18,000			30,209				—				16,417
	Land - consumer lot loans	1,677			2,185				—				487
	Multi-family	8,792			8,991				—				6,935
	Commercial real estate	31,190			42,656				—				12,946
	Commercial & industrial	1,146			7,363				—				581
	HELOC	90			1,066				—				36
	Consumer	—			4				—				—
		181,576			233,384				—				100,507
	With an allowance recorded:
	Single-family residential	317,901			317,901				25,723				305,350
	Construction - speculative	12,836			12,836				2,981				12,822
	Construction - custom	—			—				—				—
Land - acquisition & development	20,750			20,750				8,901				21,650
Land - consumer lot loans	13,881			13,881				761				13,126
Multi-family	14,153			14,555				2,462				14,279
Commercial real estate	3,722			3,722				798				2,897
Commercial & industrial	—			2				2				22
HELOC	734			734				—				743
Consumer	—			—				—				—
	383,977			384,381				41,628			-1	370,889
Total:
Single-family residential	424,856			442,243				25,723				354,874
Construction - speculative	26,562			29,404				2,981				26,403
Construction - custom	—			—				—				—
Land - acquisition & development	38,750			50,959				8,901				38,067
Land - consumer lot loans	15,558			16,066				761				13,613
Multi-family	22,945			23,546				2,462				21,214
Commercial real estate	34,912			46,378				798				15,843
Commercial & industrial	1,146			7,365				2				603
HELOC	824			1,800				—				779
Consumer	—			4				—				—
	$	565,553		$	617,765			$	41,628		-1	$	471,396
____________________
-1	Includes $15,983,000 of specific reserves and $25,645,000 included in the general reserves.

Interest_Receivable_Tables

Interest Receivable (Tables)	12 Months Ended
	Sep. 30, 2013
Receivables [Abstract]	'
Schedule of interest receivable	'
	September 30,	2013		2012
		(In thousands)
	Loans receivable	$	41,043	$	40,600
	Mortgage-backed securities	6,428		5,187
	Investment securities	1,747		1,070
		$	49,218	$	46,857

Premises_and_Equipment_Tables

Premises and Equipment (Tables)	12 Months Ended
	Sep. 30, 2013
Property, Plant and Equipment [Abstract]	'
Premises and Equipment	'
	September 30,		2013			2012
			(In thousands)
		Estimated
		Useful Life
	Land	—	$	92,560		$	82,426
	Buildings	25 - 40	132,822			114,106
	Leasehold improvements	7 - 15	8,411			7,530
	Furniture, fixtures and equipment	2 - 10	36,798			33,522
			270,591			237,584
	Less accumulated depreciation and amortization		(64,419		)	(58,739		)
			$	206,172		$	178,845

Customer_Accounts_Tables

Customer Accounts (Tables)	12 Months Ended
	Sep. 30, 2013
Banking and Thrift [Abstract]	'
Schedule of deposits	'
	September 30,	2013			2012
		(In thousands)
	Checking accounts, .15% and under	$	1,247,885		$	894,639
	Passbook and statement accounts, .20% and under	404,937			314,634
	Insured money market accounts, .01% to .30%	1,888,020			1,737,180
	Certificate accounts
	Less than 2.00%	4,716,427			4,308,341
	2.00% to 2.99%	631,256			841,520
	3.00% to 3.99%	175,549			381,324
	4.00% to 4.99%	25,335			98,119
	5.00% to 5.99%	862			861
	Total certificates	5,549,429			5,630,165
		$	9,090,271		$	8,576,618
	Certificate maturities are as follows:
	September 30,	2013			2012
		(In thousands)
	Within 1 year	$	3,642,142		$	3,556,701
	1 to 2 years	789,037			1,013,450
	2 to 3 years	406,960			425,559
	Over 3 years	711,290			634,455
		$	5,549,429		$	5,630,165
Schedule of interest expense on customer deposits	'
	Interest expense on customer accounts consisted of the following:
	Year ended September 30,	2013			2012			2011
		(in thousands)
	Checking accounts	$	936		$	857		$	1,908
	Passbook and statement accounts	566			574			682
	Insured money market accounts	4,280			4,609			7,148
	Certificate accounts	62,669			81,506			106,878
		68,451			87,546			116,616
	Less early withdrawal penalties	(548		)	(607		)	(781		)
		$	67,903		$	86,939		$	115,835
	Weighted average interest rate at end of year	0.69		%	0.9		%	1.14		%
	Weighted daily average interest rate during the year	0.75		%	0.99		%	1.32		%

FHLB_Advances_and_Other_Borrow1

FHLB Advances and Other Borrowings (Tables)	12 Months Ended
	Sep. 30, 2013
Banking and Thrift [Abstract]	'
Advances	'
	Maturity dates of FHLB advances were as follows:
	September 30,	2013			2012
		(In thousands)
	FHLB advances
	Within 1 year	—			—
	1 to 3 years	350,000			100,000
	4 to 5 years	850,000			500,000
	More than 5 years	730,000			1,280,000
		$	1,930,000		$	1,880,000
	$175,000,000 of the 2013 advances and $450,000,000 of the 2012 advances included in the above table are callable by the FHLB. If these callable advances were to be called at the earliest call dates, the maturities of all FHLB advances would be as follows:
	September 30,	2013			2012
		(In thousands)
	FHLB advances
	Within 1 year	$	175,000		$	275,000
	1 to 3 years	350,000			275,000
	4 to 5 years	775,000			500,000
	More than 5 years	630,000			830,000
		$	1,930,000		$	1,880,000
Weighted average cost and amount of advances	'
	Financial data pertaining to the weighted-average cost and the amount of FHLB advances were as follows:
	September 30,	2013			2012			2011
		(In thousands)
	Weighted average interest rate at end of year	3.52		%	3.6		%	4.1		%
	Weighted daily average interest rate during the year	3.57		%	4.14		%	4.35		%
	Daily average of FHLB advances	$	1,905,479		$	1,949,019		$	1,883,135
	Maximum amount of FHLB advances at any month end	1,930,000			1,961,895			1,962,616
	Interest expense during the year (excludes interest rate swap expense)	68,075			80,617			81,994
Schedule of financial data pertaining to weighted-average cost and amount of securities sold under agreements to repurchase	'
	Financial data pertaining to the weighted-average cost and the amount of securities sold under agreements to repurchase in prior years were as follows:
	September 30,	2013			2012			2011
		(Dollars in thousands)
	Weighted average interest rate at end of year	—		%	—		%	3.9		%
	Weighted daily average interest rate during the year	—		%	3.71		%	3.73		%
	Daily average of securities sold under agreements to repurchase	$	—		$	692,896		$	800,000
	Maximum securities sold under agreements to repurchase at any month end	—			800,000			800,000
	Interest expense during the year	—			25,693			29,867

Derivatives_and_Hedging_Activi1

Derivatives and Hedging Activities (Tables)	12 Months Ended
	Sep. 30, 2013
Derivative Instruments and Hedging Activities Disclosure [Abstract]	'
Fair value of financial instruments by balance sheet grouping	'
	The following table presents the fair value and balance sheet classification of derivatives not designated as hedging instruments at September 30, 2013 and September 30, 2012:
			Asset Derivatives									Liability Derivatives
			30-Sep-13					30-Sep-12				30-Sep-13			30-Sep-12
			Balance Sheet					Balance Sheet				Balance Sheet			Balance Sheet
			Location		Fair Value			Location		Fair Value		Location	Fair Value		Location	Fair Value
			(In thousands)
	Interest rate contracts		Other assets		$	7		N/A		N/A		Other liabilities	$	7	N/A	N/A
	Commitments to purchase MBS		AFS securities		3,188			N/A		N/A		N/A	N/A		N/A	N/A
			2013					2012
		Level in Fair Value Hierarchy	Carrying			Estimated		Carrying			Estimated
			Amount			Fair Value		Amount			Fair Value
			(In thousands)
	Financial assets
	Cash and cash equivalents	1	$	203,563		$	203,563	$	751,430		$	751,430
	Available-for-sale securities:
	Equity securities	1	101,237			101,237					—
	Obligations of U.S. government	2	533,975			533,975		183,560			183,560
	Obligations of states and political subdivisions	2	22,545			22,545		24,844			24,844
	Obligations of foreign governments		—			—		—			—
	Corporate debt securities	2	452,015			452,015		403,325			403,325
	Mortgage-backed securities
	Agency pass-through certificates	2	1,251,176			1,251,176		1,169,976			1,169,976
	Other debt securities		—			—		—			—
	Total available-for-sale securities		2,360,948			2,360,948		1,781,705			1,781,705
	Held-to-maturity securities:	2
	Equity securities		—			—		—			—
	Obligations of U.S. government		—			—		—			—
	Obligations of states and political subdivisions		—			—		795			802
	Obligations of foreign governments		—			—		—			—
	Corporate debt securities		—			—		—			—
	Mortgage-backed securities
	Agency pass-through certificates		1,654,666			1,582,849		1,190,692			1,216,421
	Other debt securities		—			—		—			—
	Total held-to-maturity securities		1,654,666			1,582,849		1,191,487			1,217,223
	Loans receivable	3	7,528,030			8,070,279		7,451,998			7,949,892
	Covered loans	3	295,947			300,610		288,376			289,754
	FDIC indemnification asset	3	64,615			62,300		87,571			85,846
	FHLB stock	2	173,009			173,009		149,840			149,840
	Financial liabilities
	Customer accounts	2	9,090,271			8,585,068		8,576,618			8,406,432
	FHLB advances and other borrowings	2	1,930,000			2,064,248		1,880,000			2,110,223

Income_Taxes_Tables

Income Taxes (Tables)	12 Months Ended
	Sep. 30, 2013
Income Tax Disclosure [Abstract]	'
Summary of major sources of temporary differences and deferred tax effects	'
	The major sources of these temporary differences and their deferred tax effects were as follows:
	September 30,	2013			2012
		(In thousands)
	Deferred tax assets
	Loan loss reserves	$	52,182		$	48,932
	REO reserves	18,018			24,003
	Asset Purchase Tax Basis Difference (net)	20,008			29,165
	Delinquent accrued interest	6,536			5,932
	Other, net	3,810			958
	Total deferred tax assets	100,554			108,990
	Deferred tax liabilities
	FDIC indemnification asset	8,033			21,050
	Federal Home Loan Bank stock dividends	34,367			35,557
	Valuation adjustment on available-for-sale securities	3,706			7,731
	Loan origination costs	11,980			12,670
	Depreciation	19,722			22,313
	Deferred gain on forward commitments	—			—
	Core deposit intangible	192			1,220
	Total deferred tax liabilities	78,000			100,541
	Net deferred tax asset	22,554			8,449
	Current tax asset	21,446			14,064
	Net tax asset	$	44,000		$	22,513
Schedule of effective income tax rate reconciliation	'
	A reconciliation of the statutory federal income tax rate to the effective income tax rate follows:
	Year ended September 30,	2013		2012		2011
	Statutory income tax rate	35	%	35	%	35	%
	State income tax	2		2		2
	Other differences	(2	)	(1	)	(1	)
	Effective income tax rate	35	%	36	%	36	%
Schedule of Components of Income Tax Expense (Benefit) [Table Text Block]	'
	Income taxes (benefit) are summarized as follows:
		2013			2012
	Federal:
	Current	$	66,756		$	57,047
	Deferred	10,355			15,589
		77,111			72,636
	State:
	Current	$	5,213		$	4,091
	Deferred	787			1,001
		6,000			5,092
	Total
	Current	71,969			61,138
	Deferred	11,142			16,590
		$	83,111		$	77,728
Reconciliation of unrecognized tax benefits	'
	A reconciliation of the beginning and ending amount of unrecognized tax benefits is as follows:
		2013			2012
		(In thousands)
	Balance at October 1,	$	4,509		$	4,191
	Tax positions related to current year:
	Additions	—			—
	Reductions	—			—
	Tax positions related to prior years:
	Additions	234			506
	Reductions	(1,293		)	—
	Settlements with taxing authorities	(302		)	—
	Lapses in statues of limitations	(3,033		)	(188		)
	Balance at September 30,	$	115		$	4,509

Stock_Award_Plans_Tables

Stock Award Plans (Tables)	12 Months Ended
	Sep. 30, 2013
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]	'
Schedule of weighted average assumptions	'
	The following weighted-average assumptions were used to estimate the fair value of stock options granted during the periods indicated:
	Year ended September 30,	2013		2012		2011
	Annual dividend yield	—	%	2.34	%	1.89	%
	Expected volatility	—	%	31	%	30	%
	Risk-free interest rate	—	%	0.77	%	2	%
	Expected life	0.0 years		4.5 years		4.5 years
Summary of option activity	'
	A summary of stock option activity under the Plan as of 2013 and changes during the year is as follows:
	Options	Shares		Weighted			Weighted	Aggregate
				Average			Average	Intrinsic
				Exercise			Remaining	Value
				Price			Contractual	(In thousands)
							Term
	Outstanding at September 30, 2012	2,300,106		$	20.6		4	$	1,269
	Granted	—		—
	Exercised	(236,691	)	18.12
	Forfeited	(159,837	)	20.31
	Outstanding at September 30, 2013	1,903,578		$	20.93		4	$	2,563
	Exercisable at September 30, 2013	1,615,828		$	21.82		3	$	1,196
Schedule of miscellaneous information related to stock options	'
	Miscellaneous information related to stock options is presented below:
		2013			2012			2011
		(Dollars in thousands)
	Compensation cost for stock options	$	473		$	848		$	1,087
	Weighted avg. grant date FV	3.24			3.53			3.89
	Total intrinsic value of options exercised	781			125			259
	Grant date FV of options exercised	791			54			312
	Cash received from option exercises	4,261			357			1,630
	Tax benefit realized for option exercises	1			—			37
Summary of nonvested activity	'
	A summary of the Company's non-vested stock options as of 2013 and changes during the year is as follows:
	Non-vested Options	Shares		Weighted
				Average
				Grant Date
				Fair Value
	Outstanding at September 30, 2012	614,272		$	3.2
	Granted	—		—
	Vested	(283,407	)	2.95
	Forfeited	(43,115	)	3.25
	Outstanding at September 30, 2013	287,750		$	3.44

Stockholders_Equity_Tables

Stockholders' Equity (Tables)	12 Months Ended
	Sep. 30, 2013
Equity [Abstract]	'
Schedule of compliance with regulatory capital requirements	'
	There are no conditions or events since that management believes have changed the Bank's categorization.
		Actual				Capital Adequacy			Categorized as Well Capitalized Under Prompt Corrective Action Provisions
						Guidelines
		Capital		Ratio		Capital	Ratio		Capital	Ratio
	As of September 30, 2013	(In thousands)
	Total Capital (to risk-weighted assets)
	The Company	$	1,749,383	26.49	%	$528,243	8	%	NA	NA
	The Bank	$	1,693,227	25.64	%	$528,380	8	%	$660,475	10	%
	Tier I Capital (to risk-weighted assets)
	The Company	$	1,666,091	25.23	%	$264,121	4	%	NA	NA
	The Bank	$	1,609,914	24.38	%	$264,190	4	%	$396,285	6	%
	Tier 1 Capital (to average assets)
	The Company	$	1,666,091	13.03	%	$511,334	4	%	NA	NA
	The Bank	$	1,609,914	12.59	%	$511,358	4	%	$639,197	5	%
	As of September 30, 2012
	Total Capital (to risk-weighted assets)
	The Company	$	1,707,211	28.14	%	$485,310	8	%	NA	NA
	The Bank	$	1,653,760	27.29	%	$484,822	8	%	$606,028	10	%
	Tier I Capital (to risk-weighted assets)
	The Company	$	1,630,656	26.88	%	$242,655	4	%	NA	NA
	The Bank	$	1,577,280	26.03	%	$242,411	4	%	$363,617	6	%
	Tier 1 Capital (to average assets)
	The Company	$	1,630,656	12.83	%	$508,534	4	%	NA	NA
	The Bank	$	1,577,280	12.92	%	$488,445	4	%	$610,556	5	%

Fair_Values_of_Financial_Instr1

Fair Values of Financial Instruments (Tables)	12 Months Ended
	Sep. 30, 2013
Fair Value Disclosures [Abstract]	'
Fair value of financial instruments by balance sheet grouping	'
	The following table presents the fair value and balance sheet classification of derivatives not designated as hedging instruments at September 30, 2013 and September 30, 2012:
			Asset Derivatives									Liability Derivatives
			30-Sep-13					30-Sep-12				30-Sep-13			30-Sep-12
			Balance Sheet					Balance Sheet				Balance Sheet			Balance Sheet
			Location		Fair Value			Location		Fair Value		Location	Fair Value		Location	Fair Value
			(In thousands)
	Interest rate contracts		Other assets		$	7		N/A		N/A		Other liabilities	$	7	N/A	N/A
	Commitments to purchase MBS		AFS securities		3,188			N/A		N/A		N/A	N/A		N/A	N/A
			2013					2012
		Level in Fair Value Hierarchy	Carrying			Estimated		Carrying			Estimated
			Amount			Fair Value		Amount			Fair Value
			(In thousands)
	Financial assets
	Cash and cash equivalents	1	$	203,563		$	203,563	$	751,430		$	751,430
	Available-for-sale securities:
	Equity securities	1	101,237			101,237					—
	Obligations of U.S. government	2	533,975			533,975		183,560			183,560
	Obligations of states and political subdivisions	2	22,545			22,545		24,844			24,844
	Obligations of foreign governments		—			—		—			—
	Corporate debt securities	2	452,015			452,015		403,325			403,325
	Mortgage-backed securities
	Agency pass-through certificates	2	1,251,176			1,251,176		1,169,976			1,169,976
	Other debt securities		—			—		—			—
	Total available-for-sale securities		2,360,948			2,360,948		1,781,705			1,781,705
	Held-to-maturity securities:	2
	Equity securities		—			—		—			—
	Obligations of U.S. government		—			—		—			—
	Obligations of states and political subdivisions		—			—		795			802
	Obligations of foreign governments		—			—		—			—
	Corporate debt securities		—			—		—			—
	Mortgage-backed securities
	Agency pass-through certificates		1,654,666			1,582,849		1,190,692			1,216,421
	Other debt securities		—			—		—			—
	Total held-to-maturity securities		1,654,666			1,582,849		1,191,487			1,217,223
	Loans receivable	3	7,528,030			8,070,279		7,451,998			7,949,892
	Covered loans	3	295,947			300,610		288,376			289,754
	FDIC indemnification asset	3	64,615			62,300		87,571			85,846
	FHLB stock	2	173,009			173,009		149,840			149,840
	Financial liabilities
	Customer accounts	2	9,090,271			8,585,068		8,576,618			8,406,432
	FHLB advances and other borrowings	2	1,930,000			2,064,248		1,880,000			2,110,223

Financial_Information_Washingt1

Financial Information - Washington Federal, INC. (Tables)	12 Months Ended
	Sep. 30, 2013
Condensed Financial Information of Parent Company Only Disclosure [Abstract]	'
Schedule of condensed financial information	'
	The following Washington Federal, Inc. (parent company only) financial information should be read in conjunction with the other notes to the Consolidated Financial Statements.
	Statements of Financial Condition
	September 30,	2013			2012
		(In thousands)
	Assets
	Cash	$	66,425		$	61,926
	Investment in subsidiary	1,881,458			1,846,375
	Other assets	—			1
	Total assets	$	1,947,883		$	1,908,302
	Liabilities
	Dividend payable and other liabilities	$	10,248		$	8,550
	Total liabilities	10,248			8,550
	Stockholders’ equity
	Common stock, $1.00 par value, 300,000,000 shares authorized;	$	132,573		$	129,950
	132,572,475 and 129,950,223 shares issued; 102,484,671 and 106,177,615 shares outstanding
	Paid-in capital	1,625,051			1,586,295
	Accumulated other comprehensive income, net of tax	6,378			13,306
	Treasury stock, at cost; 30,087,804 and 23,772,608 shares	(420,817		)	(310,579		)
	Retained earnings	594,450			480,780
	Total stockholders’ equity	1,937,635			1,899,752
	Total liabilities and stockholders’ equity	$	1,947,883		$	1,908,302
	Statements of Operations
	Year ended September 30,	2013			2012			2011
		(In thousands)
	Income
	Dividends from subsidiary	$	143,799		$	106,234		$	100,600
	Total Income	143,799			106,234			100,600
	Expense
	Miscellaneous	530			564			626
	Total expense	530			564			626
	Net income before equity in undistributed net income of subsidiary	143,269			105,670			99,974
	Equity in undistributed net income of subsidiary	8,045			32,513			11,167
	Income before income taxes	151,314			138,183			111,141
	Income tax benefit	191			—			—
	Net income	$	151,505		$	138,183		$	111,141
	Statements of Cash Flows	2013			2012			2011
		(In thousands)
	Cash Flows From Operating Activities
	Net income	$	151,505		$	138,183		$	111,141
	Adjustments to reconcile net income to net cash provided by operating activities
	Equity in undistributed net income of subsidiaries	(4,893		)	(32,513		)	(4,382		)
	Decrease (increase) in other assets	1			36			(37		)
	Increase in other liabilities	1,698			2,508			1,121
	Net cash provided by operating activities	148,311			108,214			107,843
	Cash Flows From Financing Activities
	Proceeds from exercise of common stock options and related tax benefit	4,261			357			1,686
	Treasury stock purchased	(110,238		)	(41,914		)	(59,680		)
	Dividends paid on common stock	(37,835		)	(32,430		)	(26,796		)
	Net cash used in financing activities	(143,812		)	(73,987		)	(84,790		)
	Increase (decrease) in cash	4,499			34,227			23,053
	Cash at beginning of year	61,926			27,699			4,646
	Cash at end of year	$	66,425		$	61,926		$	27,699

Selected_Quarterly_Financial_D1

Selected Quarterly Financial Data (Unaudited) (Tables)	12 Months Ended
	Sep. 30, 2013
Quarterly Financial Information Disclosure [Abstract]	'
Summary of unaudited interim results	'
	The following is a summary of the unaudited interim results of operations by quarter for the years ended September 30, 2013 and 2012:
	Year Ended September 30, 2013	First			Second			Third			Fourth
		Quarter			Quarter			Quarter			Quarter
		(In thousands, except per share data)
	Interest income	$	131,309		$	126,505		$	128,176		$	130,302
	Interest expense	35,875			33,482			33,461			33,343
	Net interest income	95,434			93,023			94,715			96,959
	Provision for loan losses	3,600			—			—			(2,250		)
	Other operating income (REO expense)	1,638			2,043			5,236			11,157
	Other operating expense	38,298			41,164			41,610			43,167
	Income before income taxes	55,174			53,902			58,341			67,199
	Income taxes	19,891			17,924			21,003			24,293
	Net income	$	35,283		$	35,978		$	37,338		$	42,906
	Basic earnings per share	$	0.33		$	0.34		$	0.36		$	0.42
	Diluted earnings per share	0.33			0.34			0.36			0.41
	Cash dividends per share	0.08			0.09			0.09			0.1
	Return of average assets	1.11		%	1.1		%	1.15		%	1.32		%
	Year Ended September 30, 2012	First			Second			Third			Fourth
		Quarter			Quarter			Quarter			Quarter
		(In thousands, except per share data)
	Interest income	$	155,926		$	154,581		$	145,384		$	134,380
	Interest expense	52,212			49,979			48,849			42,209
	Net interest income	103,714			104,602			96,535			92,171
	Provision for loan losses	11,210			18,000			10,366			5,379
	Other operating income (REO expense)	(5,923		)	3,446			4,736			4,439
	Other operating expense	34,365			36,812			35,964			35,713
	Income before income taxes	52,216			53,236			54,941			55,518
	Income taxes	18,798			19,165			19,778			19,987
	Net income	$	33,418		$	34,071		$	35,163		$	35,531
	Basic earnings per share	$	0.31		$	0.32		$	0.33		$	0.33
	Diluted earnings per share	0.31			0.32			0.33			0.33
	Cash dividends per share	0.08			0.08			0.08			0.08
	Return of average assets	0.98		%	1		%	1.04		%	1.1		%

Fair_Value_Measurements_Tables

Fair Value Measurements (Tables)	12 Months Ended
	Sep. 30, 2013
Fair Value Disclosures [Abstract]	'
Fair value of assets measured on recurring basis	'
	The following table presents the balance of assets measured at fair value on a recurring basis at September 30, 2013:
		Fair Value at September 30, 2013
		Level 1		Level 2		Level 3		Total
		(In thousands)
	Available-for-sale securities
	Equity securities	$	101,237	$	—	$	—	$	101,237
	Obligations of U.S. government	—		533,975		—		533,975
	Obligations of states and political subdivisions	—		22,545		—		22,545
	Obligations of foreign governments	—		—		—		—
	Corporate debt securities	—		452,015		—		452,015
	Agency pass through mortgage-backed securities	—		1,251,176		—		1,251,176
	Other debt securities	—		—		—		—
	Balance at end of period	$	101,237	$	2,259,711	$	—	$	2,360,948
Aggregated balance of assets measured at estimated fair value on a nonrecurring basis and total losses resulting from those fair value adjustments	'
	The following table presents the aggregated balance of assets measured at estimated fair value on a nonrecurring basis for the year ended September 30, 2013, and the total losses resulting from those fair value adjustments for the quarter and year ended September 30, 2013. These estimated fair values are shown gross of estimated selling costs:
		Through September 30, 2013								Quarter		Year Ended September 30, 2013
										Ended
										30-Sep-13
		Level 1		Level  2		Level  3		Total		Total Losses
		(In thousands)
	Impaired loans (1)	$	—	$	—	$	87,170	$	87,170	$	366	$	13,371
	Covered REO (2)	—		—		20,308		20,308		208		811
	Real estate held for sale (2)	—		—		82,840		82,840		4,618		24,268
	Balance at end of period	$	—	$	—	$	190,318	$	190,318	$	5,192	$	38,450
	___________________
	-1	The losses represents remeasurements of collateral-dependent loans.
	-2	The losses represents aggregate writedowns and charge-offs on real estate held for sale.

Covered_Assets_Tables

Covered Assets (Tables)	12 Months Ended
	Sep. 30, 2013
Covered Assets [Abstract]	'
Summary of carrying value of acquired impaired and non-impaired loans	'
	The following table reflects the carrying value of all acquired impaired and non-impaired loans as of September 30, 2013 and 2012:
		September 30, 2013										September 30, 2012
		Acquired			Acquired			Total				Acquired			Acquired		Total
		Impaired			Non-impaired							Impaired			Non-impaired
		Loans			Loans							Loans			Loans
		(In thousands)
	Single-family residential	$	28,428		$	28,460		$	56,888			$	7,699		$	35,676	$	43,375
	Construction – speculative	440			—			440				4,519			90		4,609
	Construction – custom	1,197			—			1,197				1,196			—		1,196
	Land – acquisition & development	17,953			4,810			22,763				22,747			11,430		34,177
	Land – consumer lot loans	496			245			741				497			498		995
	Multi-family	6,933			18,852			25,785				4,698			27,645		32,343
	Commercial real estate	121,105			89,499			210,604				83,784			121,592		205,376
	Commercial & industrial	14,949			9,416			24,365				18,504			13,023		31,527
	HELOC	3,869			14,750			18,619				309			17,971		18,280
	Consumer	242			604			846				659			918		1,577
	Total covered loans	$	195,612		$	166,636		$	362,248			$	144,612		$	228,843	$	373,455
	Allowance for losses	—			—			—				—			—		—
		$	195,612		$	166,636		$	362,248			$	144,612		$	228,843	$	373,455
	Discount							(66,301		)							(85,079		)
	Covered loans, net							$	295,947								$	288,376
Schedule of changes in carrying amount and accretable yield for acquired impaired and non-impaired loans	'
	Changes in the carrying amount and accretable yield for acquired impaired and non-impaired loans were as follows for the fiscal years ended September 30, 2013 and 2012:
		September 30, 2013															September 30, 2012
		Acquired Impaired								Acquired Non-impaired							Acquired Impaired						Acquired Non-impaired
		Accretable				Carrying				Accretable				Carrying			Accretable			Carrying			Accretable			Carrying
		Yield				Amount of				Yield				Amount of			Yield			Amount of			Yield			Amount of
						Loans								Loans						Loans						Loans
		(In thousands)															(In thousands)
	Balance at beginning of period	$	50,902			$	74,953			$	23,789			$	213,423		$	37,072		$	116,061		$	30,370		$	269,888
	Additions	43,299				107,946				—				—			—			—			—			—
	Reclassification from nonaccretable balance, net	17,850				—				—				—			34,690			—			—			—
	Accretion	(33,774		)		33,774				(6,526		)		6,526			(20,860		)	20,860			(6,581		)	6,581
	Transfers to REO	—				(11,196		)		—				—			—			(15,905		)	—			—
	Payments received, net	—				(67,386		)		—				(62,093		)	—			(46,063		)	—			(63,046		)
	Balance at end of period	$	78,277			$	138,091			$	17,263			$	157,856		$	50,902		$	74,953		$	23,789		$	213,423
Schedule of activity for FDIC indemnification asset	'
	The following table shows the year to date activity for the FDIC indemnification asset:
		September 30,				September 30,
		2013				2012
		(In thousands)
	Balance at beginning of period	$	87,571			$	101,634
	Additions	18,101				3,284
	Payments received	(13,421		)		(3,456		)
	Amortization	(28,722		)		(15,510		)
	Accretion	1,086				1,619
	Balance at end of period	$	64,615			$	87,571
Summary of loans based on credit quality indicators	'
	The following tables provide information on loans based on credit quality indicators (defined above) as of September 30, 2013 and 2012:
	September 30, 2013	Internally Assigned Grade																		Total
		Pass				Special mention				Substandard				Doubtful			Loss			Gross Loans
		(In thousands)
	Non-acquired loans
	Single-family residential	$	5,184,101			$	4,595			$	170,453			$	—		$	—		$	5,359,149
	Construction - speculative	99,436				3,199				28,143				—			—			130,778
	Construction - custom	302,722				—				—				—			—			302,722
	Land - acquisition & development	64,355				775				12,645				—			—			77,775
	Land - consumer lot loans	121,039				—				632				—			—			121,671
	Multi-family	819,911				2,114				9,659				—			—			831,684
	Commercial real estate	373,012				21,652				20,297				—			—			414,961
	Commercial & industrial	240,441				1,049				1,709				—			—			243,199
	HELOC	112,186				—				—				—			—			112,186
	Consumer	46,720				—				421				—			—			47,141
		$	7,363,923			$	33,384			$	243,959			$	—		$	—		$	7,641,266
	Acquired loans
	Single-family residential	$	14,468			$	—			$	—			$	—		$	—		$	14,468
	Construction - speculative	—				—				—				—			—			—
	Construction - custom	—				—				—				—			—			—
	Land - acquisition & development	312				—				1,177				—			—			1,489
	Land - consumer lot loans	3,313				—				—				—			—			3,313
	Multi-family	3,227				—				687				—			—			3,914
	Commercial real estate	105,055				4,190				24,178				—			—			133,423
	Commercial & industrial	64,933				1,309				9,084				—			—			75,326
	HELOC	10,179				—				—				—			—			10,179
	Consumer	8,267				—				—				—			—			8,267
		$	209,754			$	5,499			$	35,126			$	—		$	—		$	250,379
	Credit impaired acquired loans
	Pool 1 - Construction and land A&D	$	980			$	461			$	955			$	—		$	—		$	2,396
	Pool 2 - Single-family residential	333				—				—				—			—			333
	Pool 3 - Multi-family	—				—				—				—			—			—
	Pool 4 - HELOC & other consumer	11,337				—				—				—			—			11,337
	Pool 5 - Commercial real estate	52,509				3,155				21,245				—			—			76,909
	Pool 6 - Commercial & industrial	881				—				7,044				—			—			7,925
	Total credit impaired acquired loans	$	66,040			$	3,616			$	29,244			$	—		$	—		$	98,900
	Total gross loans	$	7,639,717			$	42,499			$	308,329			$	—		$	—		$	7,990,545
	Total grade as a % of total gross loans	95.6		%		0.5		%		3.9		%		—		%	—		%
	September 30, 2012	Internally Assigned Grade																		Total
		Pass				Special mention				Substandard				Doubtful			Loss			Gross Loans
		(In thousands)
	Non-acquired loans
	Single-family residential	$	5,588,252			$	844			$	189,826			$	—		$	—		$	5,778,922
	Construction - speculative	86,126				10,113				33,398				—			—			129,637
	Construction - custom	211,690				—				—				—			—			211,690
	Land - acquisition & development	73,661				4,637				46,379				—			—			124,677
	Land - consumer lot loans	140,006				223				1,615				—			—			141,844
	Multi-family	684,649				5,098				20,393				—			—			710,140
	Commercial real estate	278,022				16,282				24,906				—			—			319,210
	Commercial & industrial	158,421				1,071				3,331				—			—			162,823
	HELOC	112,902				—				—				—			—			112,902
	Consumer	62,611				354				409				—			—			63,374
		$	7,396,340			$	38,622			$	320,257			$	—		$	—		$	7,755,219
	Acquired loans
	Single-family residential	$	—			$	—			$	—			$	—		$	—		$	—
	Construction - speculative	—				—				—				—			—			—
	Construction - custom	—				—				—				—			—			—
	Land - acquisition & development	—				—				—				—			—			—
	Land - consumer lot loans	—				—				—				—			—			—
	Multi-family	—				—				—				—			—			—
	Commercial real estate	—				—				—				—			—			—
	Commercial & industrial	—				—				—				—			—			—
	HELOC	—				—				—				—			—			—
Consumer	—				—				—				—			—			—
	$	—			$	—			$	—			$	—		$	—		$	—
Credit impaired acquired loans
Pool 1 - Construction and land A&D	$	2,466			$	—			$	3,125			$	—		$	—		$	5,591
Pool 2 - Single-family residential	342				—				—				—			—			342
Pool 3 - Multi-family	—				—				601				—			—			601
Pool 4 - HELOC & other consumer	14,137				—				—				—			—			14,137
Pool 5 - Commercial real estate	53,683				4,308				28,200				963			—			87,154
Pool 6 - Commercial & industrial	1,566				58				733				935			—			3,292
Total credit impaired acquired loans	$	72,194			$	4,366			$	32,659			$	1,898		$	—		$	111,117
Total gross loans	$	7,468,534			$	42,988			$	352,916			$	1,898		$	—		$	7,866,336
Total grade as a % of total gross loans	94.9		%		0.6		%		4.5		%		—		%	—		%
The following tables provide information on covered loans based on credit quality indicators (defined in Note A) as of September 30, 2013:
	Internally Assigned Grade																		Total
	Pass				Special mention				Substandard				Doubtful			Loss			Net  Loans
	(In thousands)
Purchased non-credit impaired loans:
Single-family residential	$	26,426			$	—			$	2,034			$	—		$	—		$	28,460
Construction - speculative	—				—				—				—			—			—
Construction - custom	—				—				—				—			—			—
Land - acquisition & development	3,069				1,019				722				—			—			4,810
Land - consumer lot loans	245				—				—				—			—			245
Multi-family	17,217				—				1,635				—			—			18,852
Commercial real estate	56,120				9,235				24,144				—			—			89,499
Commercial & industrial	5,175				500				3,741				—			—			9,416
HELOC	14,750				—				—				—			—			14,750
Consumer	604				—				—				—			—			604
	123,606				10,754				32,276				—			—			166,636
Total grade as a % of total net loans	74.2		%		6.4		%		19.4		%		—		%	—		%
Purchased credit impaired loans:
Pool 1 - Construction and land A&D	14,361				4,296				25,363				—			—			44,020
Pool 2 - Single-family residential	21,541				—				—				—			—			21,541
Pool 3 - Multi-family	4,131				—				1,100				—			—			5,231
Pool 4 - HELOC & other consumer	4,111				—				1,880				—			—			5,991
Pool 5 - Commercial real estate	36,494				15,113				53,946				—			—			105,553
Pool 6 - Commercial & industrial	4,265				204				8,807				—			—			13,276
	$	84,903			$	19,613			$	91,096			$	—		$	—		$	195,612
																Total covered loans			362,248
																Discount			(66,301		)
																Allowance			$	—
																Covered loans, net			$	295,947
Analysis of age of purchased non-credit impaired loans in past due status	'
	The following table provides an analysis of the payment status of purchased non-credit impaired loans in past due status for the period ended September 30, 2013.
		Amount of  Loans				Days Delinquent Based on $ Amount of Loans																	% based
	Type of Loans	Net of LIP & Chg.-Offs				Current				30				60			90			Total			on $
		(In thousands)
	Single-family residential	$	28,460			$	27,411			$	78			$	—		$	971		$	1,049		3.69	%
	Construction - speculative	—				—				—				—			—			—			NM
	Construction - custom	—				—				—				—			—			—			NM
	Land - acquisition & development	4,810				4,774				—				—			36			36			0.75	%
	Land - consumer lot loans	245				199				—				—			46			46			18.78	%
	Multi-family	18,852				17,511				—				—			1,341			1,341			7.11	%
	Commercial real estate	89,499				84,949				2,779				455			1,316			4,550			5.08	%
	Commercial & industrial	9,416				9,416				—				—			—			—			—	%
	HELOC	14,750				14,334				103				74			239			416			2.82	%
	Consumer	604				601				3				—			—			3			0.5	%
		$	166,636			$	159,195			$	2,963			$	529		$	3,949		$	7,441		4.47	%

Summary_of_Significant_Account3

Summary of Significant Accounting Policies - Business Combinations (Details) (USD $)	0 Months Ended
	Oct. 31, 2012	Dec. 16, 2011	Oct. 14, 2011	Oct. 14, 2011	Oct. 14, 2011
	South Valley Bancorp, Inc.	Western National Bank	Charter Bank	Albequerque Branches	Santa Fe Branches
	branch	branch	branch	Charter Bank	Charter Bank
				branch	branch
Business Acquisition [Line Items]	'	'	'	'	'
Net loans	$361,000,000	$143,000,000	'	'	'
Net covered loans	108,000,000	'	'	'	'
Deposit accounts	736,000,000	136,000,000	254,821,000	'	'
Unamortized premium on acquisition	'	'	1,061,000	'	'
Cash received from the FDIC	'	30,000,000	'	'	'
Transaction deposit accounts	533,000,000	'	'	'	'
Number of branches acquired (in branches)	24	3	6	4	2
Assets acquired	'	177,000,000	'	'	'
Consideration transferred	44,000,000	53,000,000	'	'	'
Consideration paid in stock	34,000,000	'	'	'	'
Cash resulting from the collection of certain earn-out assets	10,000,000	'	'	'	'
Foreclosed real estate	'	7,000,000	'	'	'
Liabilities assumed	'	$153,000,000	'	'	'

Summary_of_Significant_Account4

Summary of Significant Accounting Policies - Other Narrative (Details)	12 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2011
	segments
	office
Summary of Significant Accounting Policies [Line Items]	'	'	'
Number of offices (in offices)	182	'	'
Days past grace period to initiate contact to cure deficiency	'30 days	'	'
Approximate rate reduction concession, minimum	1.00%	'	'
Approximate rate reduction concession, maximum	2.00%	'	'
Minimum days past due to stop accrual of interest	'90 days	'	'
Loans returned to full accrual status	'90 days	'	'
Minimum days past due to begin foreclosure proceedings	'90 days	'	'
Minimum performance period before move to accrual status	'6 months	'	'
Options outstanding that are not dilutive	435,825	934,880	2,190,123
Number of reportable business segments	1	'	'
Minimum	'	'	'
Summary of Significant Accounting Policies [Line Items]	'	'	'
Term for payment and rate reduction	'6 months	'	'
Intangible, useful life	'5 years	'	'
Maximum	'	'	'
Summary of Significant Accounting Policies [Line Items]	'	'	'
Term for payment and rate reduction	'24 months	'	'
Intangible, useful life	'8 years	'	'

Summary_of_Significant_Account5

Summary of Significant Accounting Policies - Intangible Assets (Details) (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Sep. 30, 2013	Sep. 30, 2012
Goodwill and Intangible Assets [Roll Forward]	'	'
Goodwill, beginning of period	$251,653	$251,653
Goodwill, Additions	8,624	0
Goodwill, end of period	260,277	251,653
Intangible assets. amortization	-1,815	-2,217
Goodwill and intangible assets, beginning of period	256,076	256,271
Goodwill and intangible assets, additions	10,057	2,022
Goodwill and intangible assets, end of period	264,318	256,076
Service Rights [Member]	'	'
Goodwill and Intangible Assets [Roll Forward]	'	'
Intangible assets, beginning of period	286	1,246
Intangible assets, additions	0	0
Intangible assets. amortization	-286	-960
Intangible assets, end of period	0	286
Core Deposit [Member]	'	'
Goodwill and Intangible Assets [Roll Forward]	'	'
Intangible assets, beginning of period	4,137	3,372
Intangible assets, additions	1,433	2,022
Intangible assets. amortization	-1,529	-1,257
Intangible assets, end of period	4,041	4,137
2014	1,600	'
2015	1,301	'
2016	682	'
2017	386	'
2018	$72	'

Investment_Securities_Investme

Investment Securities - Investments by Contractual Maturity Date (Details) (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2011
Amortized Cost, Available-for-sale securities	'	'	'
Amortized Cost	$2,350,864	$1,760,668	'
Gross Unrealized Gains / Losses, Available-for-sale securities	'	'	'
Gross unrealized gains	19,686	22,161	'
Gross unrealized loss	-9,602	-1,124	'
Fair Value, Available-for-sale securities	'	'	'
Fair Value	2,360,948	1,781,705	'
Yield, Available-for-sale securities	'	'	'
Yield	1.70%	1.99%	'
Amortized Cost, Held-to-maturity securities	'	'	'
Amortized Cost	1,654,666	1,191,487	'
Gross Unrealized Gains / Losses, Held-to-maturity securities	'	'	'
Gross unrealized gains	3,387	25,736	'
Gross unrealized losses	-75,204	0	'
Fair Value, Held-to-maturity securities	'	'	'
Fair Value	1,582,849	1,217,223	'
Yield, Held-to-maturity securities	'	'	'
Without a single maturity date	3.14%	'	'
Yield	'	3.10%	'
Investments	4,005,530	2,952,155	'
Gross unrealized gains on investments	23,073	47,897	'
Gross unrealized losses on investments	-84,806	-1,124	'
Fair value of investments	3,943,797	2,998,928	'
Yield on investments	2.30%	2.44%	'
Proceeds from available-for-sale securities	43,198	2,257,913	131,361
Gain (loss) on sale of securities	0	95,234	8,147
Term of contractual due dates of substantially all mortgage-backed securities	'25 years	'	'
Fair value of AFS securities, continuous unrealized loss position, 12 months or longer	190,357	'	'
Obligations of U.S. government	'	'	'
Amortized Cost, Available-for-sale securities	'	'	'
Within 1 year	'	19,999	'
1 to 5 years	61,002	0	'
5 to 10 years	129,219	59,300	'
Over 10 years	344,571	100,000	'
Gross Unrealized Gains / Losses, Available-for-sale securities	'	'	'
Gross unrealized gains, Within 1 year	'	42	'
Gross unrealized gains, 1 to 5 years	3,393	0	'
Gross unrealized gains, 5 to 10 years	0	4,225	'
Gross unrealized gains, Over 10 years	0	0	'
Gross unrealized losses, Within 1 year	'	-6	'
Gross unrealized losses, 1 to 5 years	-252	0	'
Gross unrealized losses, 5 to 10 years	-1,547	0	'
Gross unrealized losses, Over 10 years	-2,411	0	'
Fair Value, Available-for-sale securities	'	'	'
Within 1 year	'	20,035	'
1 to 5 years	64,143	0	'
5 to 10 years	127,672	63,525	'
Over 10 years	342,160	100,000	'
Yield, Available-for-sale securities	'	'	'
Within 1 year	'	0.57%	'
1 to 5 years	1.98%	0.00%	'
5 to 10 years	0.86%	2.21%	'
Over 10 years	0.93%	1.05%	'
Equity Securities	'	'	'
Amortized Cost, Available-for-sale securities	'	'	'
1 to 5 years	500	'	'
5 to 10 years	100,000	'	'
Gross Unrealized Gains / Losses, Available-for-sale securities	'	'	'
Gross unrealized gains, 1 to 5 years	11	'	'
Gross unrealized gains, 5 to 10 years	726	'	'
Gross unrealized losses, 1 to 5 years	0	'	'
Gross unrealized losses, 5 to 10 years	0	'	'
Fair Value, Available-for-sale securities	'	'	'
1 to 5 years	511	'	'
5 to 10 years	100,726	'	'
Yield, Available-for-sale securities	'	'	'
1 to 5 years	2.17%	'	'
5 to 10 years	1.80%	'	'
Corporate debt securities	'	'	'
Amortized Cost, Available-for-sale securities	'	'	'
Within 1 year	19,500	'	'
1 to 5 years	317,190	336,340	'
5 to 10 years	113,060	62,919	'
Gross Unrealized Gains / Losses, Available-for-sale securities	'	'	'
Gross unrealized gains, Within 1 year	3	'	'
Gross unrealized gains, 1 to 5 years	1,980	2,810	'
Gross unrealized gains, 5 to 10 years	1,180	1,324	'
Gross unrealized losses, Within 1 year	0	'	'
Gross unrealized losses, 1 to 5 years	-130	-61	'
Gross unrealized losses, 5 to 10 years	-768	-7	'
Fair Value, Available-for-sale securities	'	'	'
Within 1 year	19,503	'	'
1 to 5 years	319,040	339,089	'
5 to 10 years	113,472	64,236	'
Yield, Available-for-sale securities	'	'	'
Within 1 year	0.49%	'	'
1 to 5 years	0.75%	0.91%	'
5 to 10 years	1.53%	2.73%	'
Yield, Held-to-maturity securities	'	'	'
Fair value of AFS securities, continuous unrealized loss position, 12 months or longer	9,763	'	'
Municipal Bonds	'	'	'
Amortized Cost, Available-for-sale securities	'	'	'
Over 10 years	20,422	20,442	'
Gross Unrealized Gains / Losses, Available-for-sale securities	'	'	'
Gross unrealized gains, Over 10 years	2,123	4,402	'
Gross unrealized losses, Over 10 years	0	0	'
Fair Value, Available-for-sale securities	'	'	'
Over 10 years	22,545	24,844	'
Yield, Available-for-sale securities	'	'	'
Over 10 years	6.45%	6.45%	'
Amortized Cost, Held-to-maturity securities	'	'	'
Within 1 year	'	795	'
Gross Unrealized Gains / Losses, Held-to-maturity securities	'	'	'
Gross unrealized gains, Within 1 year	'	7	'
Gross unrealized losses, Within 1 year	'	'	'
Fair Value, Held-to-maturity securities	'	'	'
Within 1 year	'	802	'
Yield, Held-to-maturity securities	'	'	'
Within 1 year	'	5.80%	'
Agency pass through mortgage-backed securities	'	'	'
Amortized Cost, Available-for-sale securities	'	'	'
Without single maturity date	1,245,400	1,161,668	'
Gross Unrealized Gains / Losses, Available-for-sale securities	'	'	'
Gross unrealized gains, Without single maturity date	10,270	9,358	'
Gross unrealized losses, Without single maturity date	-4,494	-1,050	'
Fair Value, Available-for-sale securities	'	'	'
Without single maturity date	1,251,176	1,169,976	'
Yield, Available-for-sale securities	'	'	'
Without single maturity date	2.18%	2.28%	'
Amortized Cost, Held-to-maturity securities	'	'	'
Without single maturity date	1,654,666	1,190,692	'
Gross Unrealized Gains / Losses, Held-to-maturity securities	'	'	'
Gross unrealized gains, Without single maturity date	3,387	25,729	'
Gross unrealized losses, Without single maturity date	-75,204	0	'
Fair Value, Held-to-maturity securities	'	'	'
Without single maturity date	1,582,849	1,216,421	'
Yield, Held-to-maturity securities	'	'	'
Without a single maturity date	3.14%	3.10%	'
Fair value of AFS securities, continuous unrealized loss position, 12 months or longer	$166,503	'	'

Investment_Securities_Securiti

Investment Securities - Securities in Continuous Loss Position (Details) (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Sep. 30, 2013
Schedule of Available-for-sale Securities [Line Items]	'
Unrealized gross losses of AFS securities, continuous unrealized loss position, less than 12 months	($83,095)
Fair value of AFS securities, continuous unrealized loss position, less than 12 months	2,065,491
Unrealized gross losses of AFS securities, continuous unrealized loss position, 12 months or longer	-1,711
Fair value of AFS securities, continuous unrealized loss position, 12 months or longer	190,357
Unrealized gross losses of AFS securities, continuous unrealized loss position	-84,806
Fair value of AFS securities, continuous unrealized loss position	2,255,848
Corporate debt securities	'
Schedule of Available-for-sale Securities [Line Items]	'
Unrealized gross losses of AFS securities, continuous unrealized loss position, less than 12 months	-660
Fair value of AFS securities, continuous unrealized loss position, less than 12 months	52,434
Unrealized gross losses of AFS securities, continuous unrealized loss position, 12 months or longer	-238
Fair value of AFS securities, continuous unrealized loss position, 12 months or longer	9,763
Unrealized gross losses of AFS securities, continuous unrealized loss position	-898
Fair value of AFS securities, continuous unrealized loss position	62,197
U.S. agency securities	'
Schedule of Available-for-sale Securities [Line Items]	'
Unrealized gross losses of AFS securities, continuous unrealized loss position, less than 12 months	-4,144
Fair value of AFS securities, continuous unrealized loss position, less than 12 months	309,109
Unrealized gross losses of AFS securities, continuous unrealized loss position, 12 months or longer	-66
Fair value of AFS securities, continuous unrealized loss position, 12 months or longer	14,091
Unrealized gross losses of AFS securities, continuous unrealized loss position	-4,210
Fair value of AFS securities, continuous unrealized loss position	323,200
Agency pass through mortgage-backed securities	'
Schedule of Available-for-sale Securities [Line Items]	'
Unrealized gross losses of AFS securities, continuous unrealized loss position, less than 12 months	-78,291
Fair value of AFS securities, continuous unrealized loss position, less than 12 months	1,703,948
Unrealized gross losses of AFS securities, continuous unrealized loss position, 12 months or longer	-1,407
Fair value of AFS securities, continuous unrealized loss position, 12 months or longer	166,503
Unrealized gross losses of AFS securities, continuous unrealized loss position	-79,698
Fair value of AFS securities, continuous unrealized loss position	$1,870,451

Loans_Receivable_excluding_Cov2

Loans Receivable (excluding Covered Loans) - Schedule of Loans Receivable (excluding Covered Loans) (Details) (USD $)	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2011
In Thousands, unless otherwise specified
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'	'
Loans receivable, gross	$7,990,545	$7,866,336	'
Ratio of type of loan to total loans receivable	100.00%	100.00%	'
Allowance for probable losses	116,741	133,147	157,160
Loans in process	275,577	213,286	'
Discount on acquired loans	34,143	33,484	'
Deferred net origination fees	36,054	34,421	'
Charges against loans receivable	462,515	414,338	'
Loans receivable, net	7,528,030	7,451,998	'
Single-family residential	'	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'	'
Loans receivable, gross	5,373,950	5,779,264	'
Ratio of type of loan to total loans receivable	67.30%	73.50%	'
Allowance for probable losses	64,184	81,815	83,307
Construction - speculative	'	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'	'
Loans receivable, gross	130,778	131,526	'
Ratio of type of loan to total loans receivable	1.60%	1.60%	'
Allowance for probable losses	8,407	12,060	13,828
Construction - custom	'	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'	'
Loans receivable, gross	302,722	211,690	'
Ratio of type of loan to total loans receivable	3.80%	2.70%	'
Allowance for probable losses	882	347	623
Land - acquisition & development	'	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'	'
Loans receivable, gross	81,660	128,379	'
Ratio of type of loan to total loans receivable	1.10%	1.70%	'
Allowance for probable losses	9,165	15,598	32,719
Land - consumer lot loans	'	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'	'
Loans receivable, gross	124,984	141,844	'
Ratio of type of loan to total loans receivable	1.50%	1.80%	'
Allowance for probable losses	3,552	4,937	5,520
Multi-family	'	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'	'
Loans receivable, gross	835,598	710,741	'
Ratio of type of loan to total loans receivable	10.50%	9.00%	'
Allowance for probable losses	3,816	5,280	7,623
Commercial real estate	'	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'	'
Loans receivable, gross	625,293	406,364	'
Ratio of type of loan to total loans receivable	7.90%	5.20%	'
Allowance for probable losses	5,595	1,956	4,331
Commercial & industrial	'	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'	'
Loans receivable, gross	326,450	166,115	'
Ratio of type of loan to total loans receivable	4.00%	2.10%	'
Allowance for probable losses	16,614	7,626	5,099
HELOC	'	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'	'
Loans receivable, gross	133,631	126,942	'
Ratio of type of loan to total loans receivable	1.60%	1.60%	'
Allowance for probable losses	1,002	965	1,139
Consumer	'	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'	'
Loans receivable, gross	55,479	63,471	'
Ratio of type of loan to total loans receivable	0.70%	0.80%	'
Allowance for probable losses	3,524	2,563	2,971
Non-acquired loans	'	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'	'
Loans receivable, gross	7,641,266	7,755,219	'
Ratio of type of loan to total loans receivable	95.60%	98.60%	'
Non-acquired loans | Single-family residential	'	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'	'
Loans receivable, gross	5,359,149	5,778,922	'
Ratio of type of loan to total loans receivable	67.10%	73.50%	'
Non-acquired loans | Construction - speculative	'	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'	'
Loans receivable, gross	130,778	129,637	'
Ratio of type of loan to total loans receivable	1.60%	1.60%	'
Non-acquired loans | Construction - custom	'	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'	'
Loans receivable, gross	302,722	211,690	'
Ratio of type of loan to total loans receivable	3.80%	2.70%	'
Non-acquired loans | Land - acquisition & development	'	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'	'
Loans receivable, gross	77,775	124,677	'
Ratio of type of loan to total loans receivable	1.10%	1.60%	'
Non-acquired loans | Land - consumer lot loans	'	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'	'
Loans receivable, gross	121,671	141,844	'
Ratio of type of loan to total loans receivable	1.50%	1.80%	'
Non-acquired loans | Multi-family	'	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'	'
Loans receivable, gross	831,684	710,140	'
Ratio of type of loan to total loans receivable	10.40%	9.00%	'
Non-acquired loans | Commercial real estate	'	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'	'
Loans receivable, gross	414,961	319,210	'
Ratio of type of loan to total loans receivable	5.10%	4.10%	'
Non-acquired loans | Commercial & industrial	'	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'	'
Loans receivable, gross	243,199	162,823	'
Ratio of type of loan to total loans receivable	3.00%	2.10%	'
Non-acquired loans | HELOC	'	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'	'
Loans receivable, gross	112,186	112,902	'
Ratio of type of loan to total loans receivable	1.40%	1.40%	'
Non-acquired loans | Consumer	'	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'	'
Loans receivable, gross	47,141	63,374	'
Ratio of type of loan to total loans receivable	0.60%	0.80%	'
Acquired loans	'	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'	'
Loans receivable, gross	250,379	0	'
Ratio of type of loan to total loans receivable	3.10%	0.00%	'
Acquired loans | Single-family residential	'	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'	'
Loans receivable, gross	14,468	0	'
Ratio of type of loan to total loans receivable	0.20%	0.00%	'
Acquired loans | Construction - speculative	'	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'	'
Loans receivable, gross	0	0	'
Ratio of type of loan to total loans receivable	0.00%	0.00%	'
Acquired loans | Construction - custom	'	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'	'
Loans receivable, gross	0	0	'
Ratio of type of loan to total loans receivable	0.00%	0.00%	'
Acquired loans | Land - acquisition & development	'	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'	'
Loans receivable, gross	1,489	0	'
Ratio of type of loan to total loans receivable	0.00%	0.00%	'
Acquired loans | Land - consumer lot loans	'	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'	'
Loans receivable, gross	3,313	0	'
Ratio of type of loan to total loans receivable	0.00%	0.00%	'
Acquired loans | Multi-family	'	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'	'
Loans receivable, gross	3,914	0	'
Ratio of type of loan to total loans receivable	0.10%	0.00%	'
Acquired loans | Commercial real estate	'	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'	'
Loans receivable, gross	133,423	0	'
Ratio of type of loan to total loans receivable	1.70%	0.00%	'
Acquired loans | Commercial & industrial	'	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'	'
Loans receivable, gross	75,326	0	'
Ratio of type of loan to total loans receivable	0.90%	0.00%	'
Acquired loans | HELOC	'	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'	'
Loans receivable, gross	10,179	0	'
Ratio of type of loan to total loans receivable	0.10%	0.00%	'
Acquired loans | Consumer	'	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'	'
Loans receivable, gross	8,267	0	'
Ratio of type of loan to total loans receivable	0.10%	0.00%	'
Credit-impaired acquired loans	'	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'	'
Loans receivable, gross	98,900	111,117	'
Ratio of type of loan to total loans receivable	1.30%	1.40%	'
Credit-impaired acquired loans | Single-family residential	'	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'	'
Loans receivable, gross	333	342	'
Ratio of type of loan to total loans receivable	0.00%	0.00%	'
Credit-impaired acquired loans | Construction - speculative	'	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'	'
Loans receivable, gross	0	1,889	'
Ratio of type of loan to total loans receivable	0.00%	0.00%	'
Credit-impaired acquired loans | Construction - custom	'	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'	'
Loans receivable, gross	0	0	'
Ratio of type of loan to total loans receivable	0.00%	0.00%	'
Credit-impaired acquired loans | Land - acquisition & development	'	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'	'
Loans receivable, gross	2,396	3,702	'
Ratio of type of loan to total loans receivable	0.00%	0.10%	'
Credit-impaired acquired loans | Land - consumer lot loans	'	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'	'
Loans receivable, gross	0	0	'
Ratio of type of loan to total loans receivable	0.00%	0.00%	'
Credit-impaired acquired loans | Multi-family	'	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'	'
Loans receivable, gross	0	601	'
Ratio of type of loan to total loans receivable	0.00%	0.00%	'
Credit-impaired acquired loans | Commercial real estate	'	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'	'
Loans receivable, gross	76,909	87,154	'
Ratio of type of loan to total loans receivable	1.10%	1.10%	'
Credit-impaired acquired loans | Commercial & industrial	'	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'	'
Loans receivable, gross	7,925	3,292	'
Ratio of type of loan to total loans receivable	0.10%	0.00%	'
Credit-impaired acquired loans | HELOC	'	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'	'
Loans receivable, gross	11,266	14,040	'
Ratio of type of loan to total loans receivable	0.10%	0.20%	'
Credit-impaired acquired loans | Consumer	'	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'	'
Loans receivable, gross	$71	$97	'
Ratio of type of loan to total loans receivable	0.00%	0.00%	'

Loans_Receivable_excluding_Cov3

Loans Receivable (excluding Covered Loans) - Interest Rate Terms (Details) (USD $)	Sep. 30, 2013
In Thousands, unless otherwise specified
Accounts, Notes, Loans and Financing Receivable [Line Items]	'
Fixed-Rate	$6,082,088
Adjustable-Rate	1,908,457
Within 1 year	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'
Fixed-Rate	482,270
Adjustable-Rate	175,614
1 to 3 years	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'
Fixed-Rate	283,166
Adjustable-Rate	209,288
3 to 5 years	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'
Fixed-Rate	255,617
Adjustable-Rate	168,765
5 to 10 years	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'
Fixed-Rate	223,719
Adjustable-Rate	818,834
10 to 20 years	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'
Fixed-Rate	859,412
Adjustable-Rate	93,533
Over 20 years	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'
Fixed-Rate	3,977,904
Adjustable-Rate	$442,423

Loans_Receivable_excluding_Cov4

Loans Receivable (excluding Covered Loans) - Loans Receivable by Geographic Location (Details) (USD $)	Sep. 30, 2013	Sep. 30, 2012
In Thousands, unless otherwise specified
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Loans receivable, gross	$7,990,545	$7,866,336
Ratio of loans by geographic location to total loans	100.00%	'
Washington	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Loans receivable, gross	3,823,841	'
Ratio of loans by geographic location to total loans	48.50%	'
Oregon	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Loans receivable, gross	1,475,142	'
Ratio of loans by geographic location to total loans	18.50%	'
Arizona	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Loans receivable, gross	887,379	'
Ratio of loans by geographic location to total loans	4.80%	'
Utah	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Loans receivable, gross	546,905	'
Ratio of loans by geographic location to total loans	4.10%	'
Idaho	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Loans receivable, gross	397,720	'
Ratio of loans by geographic location to total loans	6.80%	'
New Mexico	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Loans receivable, gross	334,915	'
Ratio of loans by geographic location to total loans	3.10%	'
Other	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Loans receivable, gross	246,358	'
Ratio of loans by geographic location to total loans	11.00%	'
Texas	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Loans receivable, gross	169,565	'
Ratio of loans by geographic location to total loans	2.00%	'
Nevada	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Loans receivable, gross	108,720	'
Ratio of loans by geographic location to total loans	1.20%	'
Single-family residential	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Loans receivable, gross	5,373,950	5,779,264
Ratio of loans by geographic location to total loans	67.70%	'
Percentage of loans by geographic area as a percentage of loan type	100.00%	'
Single-family residential | Washington	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Loans receivable, gross	2,576,400	'
Ratio of loans by geographic location to total loans	32.90%	'
Percentage of loans by geographic area as a percentage of loan type	48.00%	'
Single-family residential | Oregon	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Loans receivable, gross	806,160	'
Ratio of loans by geographic location to total loans	10.10%	'
Percentage of loans by geographic area as a percentage of loan type	15.00%	'
Single-family residential | Arizona	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Loans receivable, gross	579,291	'
Ratio of loans by geographic location to total loans	4.10%	'
Percentage of loans by geographic area as a percentage of loan type	6.10%	'
Single-family residential | Utah	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Loans receivable, gross	435,250	'
Ratio of loans by geographic location to total loans	2.20%	'
Percentage of loans by geographic area as a percentage of loan type	3.30%	'
Single-family residential | Idaho	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Loans receivable, gross	329,299	'
Ratio of loans by geographic location to total loans	5.40%	'
Percentage of loans by geographic area as a percentage of loan type	8.10%	'
Single-family residential | New Mexico	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Loans receivable, gross	176,915	'
Ratio of loans by geographic location to total loans	2.90%	'
Percentage of loans by geographic area as a percentage of loan type	4.30%	'
Single-family residential | Other	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Loans receivable, gross	233,725	'
Ratio of loans by geographic location to total loans	7.20%	'
Percentage of loans by geographic area as a percentage of loan type	10.80%	'
Single-family residential | Texas	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Loans receivable, gross	137,628	'
Ratio of loans by geographic location to total loans	1.70%	'
Percentage of loans by geographic area as a percentage of loan type	2.60%	'
Single-family residential | Nevada	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Loans receivable, gross	99,282	'
Ratio of loans by geographic location to total loans	1.20%	'
Percentage of loans by geographic area as a percentage of loan type	1.80%	'
Multi-family	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Loans receivable, gross	835,598	710,741
Ratio of loans by geographic location to total loans	10.40%	'
Percentage of loans by geographic area as a percentage of loan type	100.00%	'
Multi-family | Washington	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Loans receivable, gross	285,314	'
Ratio of loans by geographic location to total loans	3.60%	'
Percentage of loans by geographic area as a percentage of loan type	34.10%	'
Multi-family | Oregon	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Loans receivable, gross	284,959	'
Ratio of loans by geographic location to total loans	3.60%	'
Percentage of loans by geographic area as a percentage of loan type	34.10%	'
Multi-family | Arizona	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Loans receivable, gross	123,181	'
Ratio of loans by geographic location to total loans	0.30%	'
Percentage of loans by geographic area as a percentage of loan type	3.20%	'
Multi-family | Utah	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Loans receivable, gross	55,930	'
Ratio of loans by geographic location to total loans	0.50%	'
Percentage of loans by geographic area as a percentage of loan type	4.80%	'
Multi-family | Idaho	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Loans receivable, gross	27,029	'
Ratio of loans by geographic location to total loans	0.70%	'
Percentage of loans by geographic area as a percentage of loan type	6.70%	'
Multi-family | New Mexico	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Loans receivable, gross	40,236	'
Ratio of loans by geographic location to total loans	0.00%	'
Percentage of loans by geographic area as a percentage of loan type	0.30%	'
Multi-family | Other	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Loans receivable, gross	2,110	'
Ratio of loans by geographic location to total loans	1.50%	'
Percentage of loans by geographic area as a percentage of loan type	14.70%	'
Multi-family | Texas	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Loans receivable, gross	13,809	'
Ratio of loans by geographic location to total loans	0.20%	'
Percentage of loans by geographic area as a percentage of loan type	1.70%	'
Multi-family | Nevada	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Loans receivable, gross	3,030	'
Ratio of loans by geographic location to total loans	0.00%	'
Percentage of loans by geographic area as a percentage of loan type	0.40%	'
Land - acquisition & development	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Loans receivable, gross	81,660	128,379
Ratio of loans by geographic location to total loans	1.00%	'
Percentage of loans by geographic area as a percentage of loan type	100.00%	'
Land - acquisition & development | Washington	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Loans receivable, gross	39,355	'
Ratio of loans by geographic location to total loans	0.50%	'
Percentage of loans by geographic area as a percentage of loan type	48.20%	'
Land - acquisition & development | Oregon	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Loans receivable, gross	6,614	'
Ratio of loans by geographic location to total loans	0.10%	'
Percentage of loans by geographic area as a percentage of loan type	8.10%	'
Land - acquisition & development | Arizona	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Loans receivable, gross	12,801	'
Ratio of loans by geographic location to total loans	0.00%	'
Percentage of loans by geographic area as a percentage of loan type	3.30%	'
Land - acquisition & development | Utah	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Loans receivable, gross	9,491	'
Ratio of loans by geographic location to total loans	0.10%	'
Percentage of loans by geographic area as a percentage of loan type	11.10%	'
Land - acquisition & development | Idaho	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Loans receivable, gross	2,685	'
Ratio of loans by geographic location to total loans	0.10%	'
Percentage of loans by geographic area as a percentage of loan type	11.60%	'
Land - acquisition & development | New Mexico	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Loans receivable, gross	9,099	'
Ratio of loans by geographic location to total loans	0.00%	'
Percentage of loans by geographic area as a percentage of loan type	0.00%	'
Land - acquisition & development | Other	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Loans receivable, gross	0	'
Ratio of loans by geographic location to total loans	0.20%	'
Percentage of loans by geographic area as a percentage of loan type	15.70%	'
Land - acquisition & development | Texas	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Loans receivable, gross	1,615	'
Ratio of loans by geographic location to total loans	0.00%	'
Percentage of loans by geographic area as a percentage of loan type	2.00%	'
Land - acquisition & development | Nevada	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Loans receivable, gross	0	'
Ratio of loans by geographic location to total loans	0.00%	'
Percentage of loans by geographic area as a percentage of loan type	0.00%	'
Land - consumer lot loans	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Loans receivable, gross	124,984	141,844
Ratio of loans by geographic location to total loans	1.50%	'
Percentage of loans by geographic area as a percentage of loan type	100.00%	'
Land - consumer lot loans | Washington	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Loans receivable, gross	65,131	'
Ratio of loans by geographic location to total loans	0.80%	'
Percentage of loans by geographic area as a percentage of loan type	52.00%	'
Land - consumer lot loans | Oregon	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Loans receivable, gross	24,185	'
Ratio of loans by geographic location to total loans	0.30%	'
Percentage of loans by geographic area as a percentage of loan type	19.40%	'
Land - consumer lot loans | Arizona	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Loans receivable, gross	11,991	'
Ratio of loans by geographic location to total loans	0.10%	'
Percentage of loans by geographic area as a percentage of loan type	9.30%	'
Land - consumer lot loans | Utah	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Loans receivable, gross	6,489	'
Ratio of loans by geographic location to total loans	0.00%	'
Percentage of loans by geographic area as a percentage of loan type	2.90%	'
Land - consumer lot loans | Idaho	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Loans receivable, gross	11,602	'
Ratio of loans by geographic location to total loans	0.10%	'
Percentage of loans by geographic area as a percentage of loan type	5.20%	'
Land - consumer lot loans | New Mexico	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Loans receivable, gross	3,628	'
Ratio of loans by geographic location to total loans	0.00%	'
Percentage of loans by geographic area as a percentage of loan type	0.00%	'
Land - consumer lot loans | Other	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Loans receivable, gross	0	'
Ratio of loans by geographic location to total loans	0.20%	'
Percentage of loans by geographic area as a percentage of loan type	9.60%	'
Land - consumer lot loans | Texas	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Loans receivable, gross	948	'
Ratio of loans by geographic location to total loans	0.00%	'
Percentage of loans by geographic area as a percentage of loan type	0.80%	'
Land - consumer lot loans | Nevada	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Loans receivable, gross	1,010	'
Ratio of loans by geographic location to total loans	0.00%	'
Percentage of loans by geographic area as a percentage of loan type	0.80%	'
Construction - custom	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Loans receivable, gross	302,722	211,690
Ratio of loans by geographic location to total loans	3.70%	'
Percentage of loans by geographic area as a percentage of loan type	100.00%	'
Construction - custom | Washington	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Loans receivable, gross	177,062	'
Ratio of loans by geographic location to total loans	2.20%	'
Percentage of loans by geographic area as a percentage of loan type	58.50%	'
Construction - custom | Oregon	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Loans receivable, gross	44,075	'
Ratio of loans by geographic location to total loans	0.60%	'
Percentage of loans by geographic area as a percentage of loan type	14.60%	'
Construction - custom | Arizona	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Loans receivable, gross	30,536	'
Ratio of loans by geographic location to total loans	0.10%	'
Percentage of loans by geographic area as a percentage of loan type	3.60%	'
Construction - custom | Utah	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Loans receivable, gross	26,433	'
Ratio of loans by geographic location to total loans	0.10%	'
Percentage of loans by geographic area as a percentage of loan type	2.40%	'
Construction - custom | Idaho	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Loans receivable, gross	10,917	'
Ratio of loans by geographic location to total loans	0.30%	'
Percentage of loans by geographic area as a percentage of loan type	8.70%	'
Construction - custom | New Mexico	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Loans receivable, gross	7,118	'
Ratio of loans by geographic location to total loans	0.00%	'
Percentage of loans by geographic area as a percentage of loan type	0.00%	'
Construction - custom | Other	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Loans receivable, gross	0	'
Ratio of loans by geographic location to total loans	0.40%	'
Percentage of loans by geographic area as a percentage of loan type	10.10%	'
Construction - custom | Texas	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Loans receivable, gross	3,411	'
Ratio of loans by geographic location to total loans	0.00%	'
Percentage of loans by geographic area as a percentage of loan type	1.10%	'
Construction - custom | Nevada	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Loans receivable, gross	3,170	'
Ratio of loans by geographic location to total loans	0.00%	'
Percentage of loans by geographic area as a percentage of loan type	1.00%	'
Construction - speculative	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Loans receivable, gross	130,778	131,526
Ratio of loans by geographic location to total loans	1.50%	'
Percentage of loans by geographic area as a percentage of loan type	100.00%	'
Construction - speculative | Washington	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Loans receivable, gross	66,543	'
Ratio of loans by geographic location to total loans	0.80%	'
Percentage of loans by geographic area as a percentage of loan type	50.80%	'
Construction - speculative | Oregon	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Loans receivable, gross	27,620	'
Ratio of loans by geographic location to total loans	0.30%	'
Percentage of loans by geographic area as a percentage of loan type	21.10%	'
Construction - speculative | Arizona	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Loans receivable, gross	11,098	'
Ratio of loans by geographic location to total loans	0.10%	'
Percentage of loans by geographic area as a percentage of loan type	7.50%	'
Construction - speculative | Utah	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Loans receivable, gross	5,955	'
Ratio of loans by geographic location to total loans	0.10%	'
Percentage of loans by geographic area as a percentage of loan type	6.90%	'
Construction - speculative | Idaho	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Loans receivable, gross	9,818	'
Ratio of loans by geographic location to total loans	0.10%	'
Percentage of loans by geographic area as a percentage of loan type	4.60%	'
Construction - speculative | New Mexico	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Loans receivable, gross	9,016	'
Ratio of loans by geographic location to total loans	0.00%	'
Percentage of loans by geographic area as a percentage of loan type	0.00%	'
Construction - speculative | Other	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Loans receivable, gross	0	'
Ratio of loans by geographic location to total loans	0.10%	'
Percentage of loans by geographic area as a percentage of loan type	8.50%	'
Construction - speculative | Texas	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Loans receivable, gross	728	'
Ratio of loans by geographic location to total loans	0.00%	'
Percentage of loans by geographic area as a percentage of loan type	0.60%	'
Construction - speculative | Nevada	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Loans receivable, gross	0	'
Ratio of loans by geographic location to total loans	0.00%	'
Percentage of loans by geographic area as a percentage of loan type	0.00%	'
Commercial real estate	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Loans receivable, gross	625,293	406,364
Ratio of loans by geographic location to total loans	7.80%	'
Percentage of loans by geographic area as a percentage of loan type	100.00%	'
Commercial real estate | Washington	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Loans receivable, gross	286,676	'
Ratio of loans by geographic location to total loans	3.60%	'
Percentage of loans by geographic area as a percentage of loan type	45.90%	'
Commercial real estate | Oregon	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Loans receivable, gross	158,062	'
Ratio of loans by geographic location to total loans	2.00%	'
Percentage of loans by geographic area as a percentage of loan type	25.30%	'
Commercial real estate | Arizona	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Loans receivable, gross	95,834	'
Ratio of loans by geographic location to total loans	0.00%	'
Percentage of loans by geographic area as a percentage of loan type	0.20%	'
Commercial real estate | Utah	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Loans receivable, gross	0	'
Ratio of loans by geographic location to total loans	0.80%	'
Percentage of loans by geographic area as a percentage of loan type	10.70%	'
Commercial real estate | Idaho	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Loans receivable, gross	1,417	'
Ratio of loans by geographic location to total loans	0.00%	'
Percentage of loans by geographic area as a percentage of loan type	0.00%	'
Commercial real estate | New Mexico	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Loans receivable, gross	66,662	'
Ratio of loans by geographic location to total loans	0.10%	'
Percentage of loans by geographic area as a percentage of loan type	0.70%	'
Commercial real estate | Other	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Loans receivable, gross	4,516	'
Ratio of loans by geographic location to total loans	1.20%	'
Percentage of loans by geographic area as a percentage of loan type	15.30%	'
Commercial real estate | Texas	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Loans receivable, gross	10,131	'
Ratio of loans by geographic location to total loans	0.10%	'
Percentage of loans by geographic area as a percentage of loan type	1.60%	'
Commercial real estate | Nevada	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Loans receivable, gross	1,995	'
Ratio of loans by geographic location to total loans	0.00%	'
Percentage of loans by geographic area as a percentage of loan type	0.30%	'
Commercial & industrial	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Loans receivable, gross	326,450	166,115
Ratio of loans by geographic location to total loans	4.00%	'
Percentage of loans by geographic area as a percentage of loan type	100.00%	'
Commercial & industrial | Washington	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Loans receivable, gross	210,665	'
Ratio of loans by geographic location to total loans	2.60%	'
Percentage of loans by geographic area as a percentage of loan type	64.50%	'
Commercial & industrial | Oregon	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Loans receivable, gross	98,541	'
Ratio of loans by geographic location to total loans	1.20%	'
Percentage of loans by geographic area as a percentage of loan type	30.20%	'
Commercial & industrial | Arizona	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Loans receivable, gross	2,736	'
Ratio of loans by geographic location to total loans	0.00%	'
Percentage of loans by geographic area as a percentage of loan type	0.10%	'
Commercial & industrial | Utah	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Loans receivable, gross	636	'
Ratio of loans by geographic location to total loans	0.10%	'
Percentage of loans by geographic area as a percentage of loan type	2.20%	'
Commercial & industrial | Idaho	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Loans receivable, gross	192	'
Ratio of loans by geographic location to total loans	0.00%	'
Percentage of loans by geographic area as a percentage of loan type	0.20%	'
Commercial & industrial | New Mexico	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Loans receivable, gross	7,278	'
Ratio of loans by geographic location to total loans	0.10%	'
Percentage of loans by geographic area as a percentage of loan type	1.60%	'
Commercial & industrial | Other	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Loans receivable, gross	5,118	'
Ratio of loans by geographic location to total loans	0.00%	'
Percentage of loans by geographic area as a percentage of loan type	0.80%	'
Commercial & industrial | Texas	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Loans receivable, gross	1,253	'
Ratio of loans by geographic location to total loans	0.00%	'
Percentage of loans by geographic area as a percentage of loan type	0.40%	'
Commercial & industrial | Nevada	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Loans receivable, gross	31	'
Ratio of loans by geographic location to total loans	0.00%	'
Percentage of loans by geographic area as a percentage of loan type	0.00%	'
Consumer	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Loans receivable, gross	55,479	63,471
Ratio of loans by geographic location to total loans	0.70%	'
Percentage of loans by geographic area as a percentage of loan type	100.00%	'
Consumer | Washington	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Loans receivable, gross	45,313	'
Ratio of loans by geographic location to total loans	0.60%	'
Percentage of loans by geographic area as a percentage of loan type	81.70%	'
Consumer | Oregon	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Loans receivable, gross	7,646	'
Ratio of loans by geographic location to total loans	0.10%	'
Percentage of loans by geographic area as a percentage of loan type	13.80%	'
Consumer | Arizona	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Loans receivable, gross	180	'
Ratio of loans by geographic location to total loans	0.00%	'
Percentage of loans by geographic area as a percentage of loan type	0.00%	'
Consumer | Utah	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Loans receivable, gross	45	'
Ratio of loans by geographic location to total loans	0.00%	'
Percentage of loans by geographic area as a percentage of loan type	2.50%	'
Consumer | Idaho	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Loans receivable, gross	13	'
Ratio of loans by geographic location to total loans	0.00%	'
Percentage of loans by geographic area as a percentage of loan type	0.10%	'
Consumer | New Mexico	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Loans receivable, gross	1,367	'
Ratio of loans by geographic location to total loans	0.00%	'
Percentage of loans by geographic area as a percentage of loan type	1.50%	'
Consumer | Other	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Loans receivable, gross	848	'
Ratio of loans by geographic location to total loans	0.00%	'
Percentage of loans by geographic area as a percentage of loan type	0.30%	'
Consumer | Texas	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Loans receivable, gross	42	'
Ratio of loans by geographic location to total loans	0.00%	'
Percentage of loans by geographic area as a percentage of loan type	0.10%	'
Consumer | Nevada	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Loans receivable, gross	25	'
Ratio of loans by geographic location to total loans	0.00%	'
Percentage of loans by geographic area as a percentage of loan type	0.00%	'
HELOC	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Loans receivable, gross	133,631	126,942
Ratio of loans by geographic location to total loans	1.70%	'
Percentage of loans by geographic area as a percentage of loan type	100.00%	'
HELOC | Washington	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Loans receivable, gross	71,382	'
Ratio of loans by geographic location to total loans	0.90%	'
Percentage of loans by geographic area as a percentage of loan type	53.40%	'
HELOC | Oregon	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Loans receivable, gross	17,280	'
Ratio of loans by geographic location to total loans	0.20%	'
Percentage of loans by geographic area as a percentage of loan type	12.90%	'
HELOC | Arizona	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Loans receivable, gross	19,731	'
Ratio of loans by geographic location to total loans	0.10%	'
Percentage of loans by geographic area as a percentage of loan type	3.60%	'
HELOC | Utah	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Loans receivable, gross	6,676	'
Ratio of loans by geographic location to total loans	0.20%	'
Percentage of loans by geographic area as a percentage of loan type	10.20%	'
HELOC | Idaho	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Loans receivable, gross	4,748	'
Ratio of loans by geographic location to total loans	0.10%	'
Percentage of loans by geographic area as a percentage of loan type	5.00%	'
HELOC | New Mexico	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Loans receivable, gross	13,596	'
Ratio of loans by geographic location to total loans	0.00%	'
Percentage of loans by geographic area as a percentage of loan type	0.00%	'
HELOC | Other	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Loans receivable, gross	41	'
Ratio of loans by geographic location to total loans	0.20%	'
Percentage of loans by geographic area as a percentage of loan type	14.80%	'
HELOC | Texas	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Loans receivable, gross	0	'
Ratio of loans by geographic location to total loans	0.00%	'
Percentage of loans by geographic area as a percentage of loan type	0.00%	'
HELOC | Nevada	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Loans receivable, gross	$177	'
Ratio of loans by geographic location to total loans	0.00%	'
Percentage of loans by geographic area as a percentage of loan type	0.10%	'

Loans_Receivable_excluding_Cov5

Loans Receivable (excluding Covered Loans) - Loans Impaired, Loan Commitments and Loans Serviced (Details) (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Sep. 30, 2013	Sep. 30, 2012
Receivables [Abstract]	'	'
Recorded investment in impaired loans	$454,557	$565,553
Troubled Debt Restructuring included in impaired loans	415,696	433,278
Impaired loans with allocated reserves	6,035	44,167
Reserves on impaired loans	3,473	15,983
Average balance of impaired loans	495,472	523,363
Interest income from impaired loans	24,798	28,366
Outstanding fixed-rate origination commitments	190,363	151,990
Loans serviced for others	$55,589	$58,673

Loans_Receivable_excluding_Cov6

Loans Receivable (excluding Covered Loans) - Loans on Non-accrual Status (Details) (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Sep. 30, 2013	Sep. 30, 2012
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Nonaccrual loans by portfolio segment	$131,299	$173,427
Ratio of nonaccrual loan by portfolio segment to total loans on nonaccrual status	100.00%	100.00%
Single family residential loans as percentage of restructured loans	86.00%	'
Approximate rate reduction concession, minimum	1.00%	'
Approximate rate reduction concession, maximum	2.00%	'
Single-family residential	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Nonaccrual loans by portfolio segment	100,460	131,193
Ratio of nonaccrual loan by portfolio segment to total loans on nonaccrual status	76.50%	75.70%
Construction - speculative	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Nonaccrual loans by portfolio segment	4,560	10,634
Ratio of nonaccrual loan by portfolio segment to total loans on nonaccrual status	3.50%	6.10%
Construction - custom	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Nonaccrual loans by portfolio segment	0	539
Ratio of nonaccrual loan by portfolio segment to total loans on nonaccrual status	0.00%	0.30%
Land - acquisition & development	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Nonaccrual loans by portfolio segment	2,903	13,477
Ratio of nonaccrual loan by portfolio segment to total loans on nonaccrual status	2.20%	7.80%
Land - consumer lot loans	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Nonaccrual loans by portfolio segment	3,337	5,149
Ratio of nonaccrual loan by portfolio segment to total loans on nonaccrual status	2.50%	3.00%
Multi-family	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Nonaccrual loans by portfolio segment	6,573	4,185
Ratio of nonaccrual loan by portfolio segment to total loans on nonaccrual status	5.00%	2.40%
Commercial real estate	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Nonaccrual loans by portfolio segment	11,736	7,653
Ratio of nonaccrual loan by portfolio segment to total loans on nonaccrual status	8.90%	4.40%
Commercial & industrial	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Nonaccrual loans by portfolio segment	477	16
Ratio of nonaccrual loan by portfolio segment to total loans on nonaccrual status	0.40%	0.00%
HELOC	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Nonaccrual loans by portfolio segment	263	198
Ratio of nonaccrual loan by portfolio segment to total loans on nonaccrual status	0.20%	0.10%
Consumer	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Nonaccrual loans by portfolio segment	$990	$383
Ratio of nonaccrual loan by portfolio segment to total loans on nonaccrual status	0.80%	0.20%
Minimum	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Term for payment and rate reduction	'6 months	'
Maximum	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Term for payment and rate reduction	'24 months	'

Loans_Receivable_excluding_Cov7

Loans Receivable (excluding Covered Loans) - Loans Receivable, Analysis of Age of Loans in Past Due Status (Details) (USD $)	Sep. 30, 2013
In Thousands, unless otherwise specified
Accounts, Notes, Loans and Financing Receivable [Line Items]	'
Amount of Loans, Net of LIP & Charge-Offs	$7,714,968
Days Delinquent Based on $ Amount of Loans, Current	7,563,335
Days Delinquent Based on $ Amount of Loans, 30 Days	35,179
Days Delinquent Based on $ Amount of Loans, 60 Days	14,933
Days Delinquent Based on $ Amount of Loans, 90 Days	101,521
Days Delinquent Based on $ Amount of Loans, Total	151,633
Ratio of past due loans to total loans, net of charge-offs and LIPs	1.97%
Non-acquired loans	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'
Amount of Loans, Net of LIP & Charge-Offs	7,365,734
Days Delinquent Based on $ Amount of Loans, Current	7,224,617
Days Delinquent Based on $ Amount of Loans, 30 Days	32,437
Days Delinquent Based on $ Amount of Loans, 60 Days	13,575
Days Delinquent Based on $ Amount of Loans, 90 Days	95,105
Days Delinquent Based on $ Amount of Loans, Total	141,117
Ratio of past due loans to total loans, net of charge-offs and LIPs	1.92%
Non-acquired loans | Single-family residential	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'
Amount of Loans, Net of LIP & Charge-Offs	5,356,200
Days Delinquent Based on $ Amount of Loans, Current	5,237,413
Days Delinquent Based on $ Amount of Loans, 30 Days	26,888
Days Delinquent Based on $ Amount of Loans, 60 Days	12,373
Days Delinquent Based on $ Amount of Loans, 90 Days	79,526
Days Delinquent Based on $ Amount of Loans, Total	118,787
Ratio of past due loans to total loans, net of charge-offs and LIPs	2.22%
Non-acquired loans | Construction - speculative	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'
Amount of Loans, Net of LIP & Charge-Offs	82,422
Days Delinquent Based on $ Amount of Loans, Current	80,047
Days Delinquent Based on $ Amount of Loans, 30 Days	0
Days Delinquent Based on $ Amount of Loans, 60 Days	0
Days Delinquent Based on $ Amount of Loans, 90 Days	2,375
Days Delinquent Based on $ Amount of Loans, Total	2,375
Ratio of past due loans to total loans, net of charge-offs and LIPs	2.88%
Non-acquired loans | Construction - custom	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'
Amount of Loans, Net of LIP & Charge-Offs	130,095
Days Delinquent Based on $ Amount of Loans, Current	129,678
Days Delinquent Based on $ Amount of Loans, 30 Days	417
Days Delinquent Based on $ Amount of Loans, 60 Days	0
Days Delinquent Based on $ Amount of Loans, 90 Days	0
Days Delinquent Based on $ Amount of Loans, Total	417
Ratio of past due loans to total loans, net of charge-offs and LIPs	0.32%
Non-acquired loans | Land - acquisition & development	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'
Amount of Loans, Net of LIP & Charge-Offs	71,567
Days Delinquent Based on $ Amount of Loans, Current	70,106
Days Delinquent Based on $ Amount of Loans, 30 Days	0
Days Delinquent Based on $ Amount of Loans, 60 Days	0
Days Delinquent Based on $ Amount of Loans, 90 Days	1,461
Days Delinquent Based on $ Amount of Loans, Total	1,461
Ratio of past due loans to total loans, net of charge-offs and LIPs	2.04%
Non-acquired loans | Land - consumer lot loans	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'
Amount of Loans, Net of LIP & Charge-Offs	121,473
Days Delinquent Based on $ Amount of Loans, Current	117,076
Days Delinquent Based on $ Amount of Loans, 30 Days	806
Days Delinquent Based on $ Amount of Loans, 60 Days	355
Days Delinquent Based on $ Amount of Loans, 90 Days	3,236
Days Delinquent Based on $ Amount of Loans, Total	4,397
Ratio of past due loans to total loans, net of charge-offs and LIPs	3.62%
Non-acquired loans | Multi-family	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'
Amount of Loans, Net of LIP & Charge-Offs	790,564
Days Delinquent Based on $ Amount of Loans, Current	785,793
Days Delinquent Based on $ Amount of Loans, 30 Days	0
Days Delinquent Based on $ Amount of Loans, 60 Days	0
Days Delinquent Based on $ Amount of Loans, 90 Days	4,771
Days Delinquent Based on $ Amount of Loans, Total	4,771
Ratio of past due loans to total loans, net of charge-offs and LIPs	0.60%
Non-acquired loans | Commercial real estate	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'
Amount of Loans, Net of LIP & Charge-Offs	404,680
Days Delinquent Based on $ Amount of Loans, Current	398,114
Days Delinquent Based on $ Amount of Loans, 30 Days	2,942
Days Delinquent Based on $ Amount of Loans, 60 Days	351
Days Delinquent Based on $ Amount of Loans, 90 Days	3,273
Days Delinquent Based on $ Amount of Loans, Total	6,566
Ratio of past due loans to total loans, net of charge-offs and LIPs	1.62%
Non-acquired loans | Commercial & industrial	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'
Amount of Loans, Net of LIP & Charge-Offs	249,405
Days Delinquent Based on $ Amount of Loans, Current	249,363
Days Delinquent Based on $ Amount of Loans, 30 Days	42
Days Delinquent Based on $ Amount of Loans, 60 Days	0
Days Delinquent Based on $ Amount of Loans, 90 Days	0
Days Delinquent Based on $ Amount of Loans, Total	42
Ratio of past due loans to total loans, net of charge-offs and LIPs	0.02%
Non-acquired loans | HELOC	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'
Amount of Loans, Net of LIP & Charge-Offs	112,186
Days Delinquent Based on $ Amount of Loans, Current	111,407
Days Delinquent Based on $ Amount of Loans, 30 Days	493
Days Delinquent Based on $ Amount of Loans, 60 Days	213
Days Delinquent Based on $ Amount of Loans, 90 Days	73
Days Delinquent Based on $ Amount of Loans, Total	779
Ratio of past due loans to total loans, net of charge-offs and LIPs	0.69%
Non-acquired loans | Consumer	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'
Amount of Loans, Net of LIP & Charge-Offs	47,142
Days Delinquent Based on $ Amount of Loans, Current	45,620
Days Delinquent Based on $ Amount of Loans, 30 Days	849
Days Delinquent Based on $ Amount of Loans, 60 Days	283
Days Delinquent Based on $ Amount of Loans, 90 Days	390
Days Delinquent Based on $ Amount of Loans, Total	1,522
Ratio of past due loans to total loans, net of charge-offs and LIPs	3.23%
Acquired loans	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'
Amount of Loans, Net of LIP & Charge-Offs	250,350
Days Delinquent Based on $ Amount of Loans, Current	243,718
Days Delinquent Based on $ Amount of Loans, 30 Days	441
Days Delinquent Based on $ Amount of Loans, 60 Days	894
Days Delinquent Based on $ Amount of Loans, 90 Days	5,297
Days Delinquent Based on $ Amount of Loans, Total	6,632
Ratio of past due loans to total loans, net of charge-offs and LIPs	2.65%
Acquired loans | Single-family residential	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'
Amount of Loans, Net of LIP & Charge-Offs	14,468
Days Delinquent Based on $ Amount of Loans, Current	14,343
Days Delinquent Based on $ Amount of Loans, 30 Days	82
Days Delinquent Based on $ Amount of Loans, 60 Days	0
Days Delinquent Based on $ Amount of Loans, 90 Days	43
Days Delinquent Based on $ Amount of Loans, Total	125
Ratio of past due loans to total loans, net of charge-offs and LIPs	0.86%
Acquired loans | Construction - speculative	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'
Amount of Loans, Net of LIP & Charge-Offs	0
Days Delinquent Based on $ Amount of Loans, Current	0
Days Delinquent Based on $ Amount of Loans, 30 Days	0
Days Delinquent Based on $ Amount of Loans, 60 Days	0
Days Delinquent Based on $ Amount of Loans, 90 Days	0
Days Delinquent Based on $ Amount of Loans, Total	0
Acquired loans | Construction - custom	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'
Amount of Loans, Net of LIP & Charge-Offs	0
Days Delinquent Based on $ Amount of Loans, Current	0
Days Delinquent Based on $ Amount of Loans, 30 Days	0
Days Delinquent Based on $ Amount of Loans, 60 Days	0
Days Delinquent Based on $ Amount of Loans, 90 Days	0
Days Delinquent Based on $ Amount of Loans, Total	0
Acquired loans | Land - acquisition & development	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'
Amount of Loans, Net of LIP & Charge-Offs	1,489
Days Delinquent Based on $ Amount of Loans, Current	1,241
Days Delinquent Based on $ Amount of Loans, 30 Days	0
Days Delinquent Based on $ Amount of Loans, 60 Days	0
Days Delinquent Based on $ Amount of Loans, 90 Days	248
Days Delinquent Based on $ Amount of Loans, Total	248
Ratio of past due loans to total loans, net of charge-offs and LIPs	16.66%
Acquired loans | Land - consumer lot loans	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'
Amount of Loans, Net of LIP & Charge-Offs	3,313
Days Delinquent Based on $ Amount of Loans, Current	2,987
Days Delinquent Based on $ Amount of Loans, 30 Days	125
Days Delinquent Based on $ Amount of Loans, 60 Days	100
Days Delinquent Based on $ Amount of Loans, 90 Days	101
Days Delinquent Based on $ Amount of Loans, Total	326
Ratio of past due loans to total loans, net of charge-offs and LIPs	9.84%
Acquired loans | Multi-family	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'
Amount of Loans, Net of LIP & Charge-Offs	3,914
Days Delinquent Based on $ Amount of Loans, Current	3,914
Days Delinquent Based on $ Amount of Loans, 30 Days	0
Days Delinquent Based on $ Amount of Loans, 60 Days	0
Days Delinquent Based on $ Amount of Loans, 90 Days	0
Days Delinquent Based on $ Amount of Loans, Total	0
Ratio of past due loans to total loans, net of charge-offs and LIPs	0.00%
Acquired loans | Commercial real estate	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'
Amount of Loans, Net of LIP & Charge-Offs	133,398
Days Delinquent Based on $ Amount of Loans, Current	128,610
Days Delinquent Based on $ Amount of Loans, 30 Days	134
Days Delinquent Based on $ Amount of Loans, 60 Days	617
Days Delinquent Based on $ Amount of Loans, 90 Days	4,037
Days Delinquent Based on $ Amount of Loans, Total	4,788
Ratio of past due loans to total loans, net of charge-offs and LIPs	3.59%
Acquired loans | Commercial & industrial	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'
Amount of Loans, Net of LIP & Charge-Offs	75,323
Days Delinquent Based on $ Amount of Loans, Current	74,992
Days Delinquent Based on $ Amount of Loans, 30 Days	10
Days Delinquent Based on $ Amount of Loans, 60 Days	153
Days Delinquent Based on $ Amount of Loans, 90 Days	168
Days Delinquent Based on $ Amount of Loans, Total	331
Ratio of past due loans to total loans, net of charge-offs and LIPs	0.44%
Acquired loans | HELOC	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'
Amount of Loans, Net of LIP & Charge-Offs	10,179
Days Delinquent Based on $ Amount of Loans, Current	10,063
Days Delinquent Based on $ Amount of Loans, 30 Days	0
Days Delinquent Based on $ Amount of Loans, 60 Days	16
Days Delinquent Based on $ Amount of Loans, 90 Days	100
Days Delinquent Based on $ Amount of Loans, Total	116
Ratio of past due loans to total loans, net of charge-offs and LIPs	1.14%
Acquired loans | Consumer	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'
Amount of Loans, Net of LIP & Charge-Offs	8,266
Days Delinquent Based on $ Amount of Loans, Current	7,568
Days Delinquent Based on $ Amount of Loans, 30 Days	90
Days Delinquent Based on $ Amount of Loans, 60 Days	8
Days Delinquent Based on $ Amount of Loans, 90 Days	600
Days Delinquent Based on $ Amount of Loans, Total	698
Ratio of past due loans to total loans, net of charge-offs and LIPs	8.44%
Credit-impaired acquired loans	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'
Amount of Loans, Net of LIP & Charge-Offs	98,884
Days Delinquent Based on $ Amount of Loans, Current	95,000
Days Delinquent Based on $ Amount of Loans, 30 Days	2,301
Days Delinquent Based on $ Amount of Loans, 60 Days	464
Days Delinquent Based on $ Amount of Loans, 90 Days	1,119
Days Delinquent Based on $ Amount of Loans, Total	3,884
Ratio of past due loans to total loans, net of charge-offs and LIPs	3.93%
Credit-impaired acquired loans | Single-family residential	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'
Amount of Loans, Net of LIP & Charge-Offs	333
Days Delinquent Based on $ Amount of Loans, Current	333
Days Delinquent Based on $ Amount of Loans, 30 Days	0
Days Delinquent Based on $ Amount of Loans, 60 Days	0
Days Delinquent Based on $ Amount of Loans, 90 Days	0
Days Delinquent Based on $ Amount of Loans, Total	0
Ratio of past due loans to total loans, net of charge-offs and LIPs	0.00%
Credit-impaired acquired loans | Construction - speculative	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'
Amount of Loans, Net of LIP & Charge-Offs	0
Days Delinquent Based on $ Amount of Loans, Current	0
Days Delinquent Based on $ Amount of Loans, 30 Days	0
Days Delinquent Based on $ Amount of Loans, 60 Days	0
Days Delinquent Based on $ Amount of Loans, 90 Days	0
Days Delinquent Based on $ Amount of Loans, Total	0
Ratio of past due loans to total loans, net of charge-offs and LIPs	0.00%
Credit-impaired acquired loans | Construction - custom	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'
Amount of Loans, Net of LIP & Charge-Offs	0
Days Delinquent Based on $ Amount of Loans, Current	0
Days Delinquent Based on $ Amount of Loans, 30 Days	0
Days Delinquent Based on $ Amount of Loans, 60 Days	0
Days Delinquent Based on $ Amount of Loans, 90 Days	0
Days Delinquent Based on $ Amount of Loans, Total	0
Ratio of past due loans to total loans, net of charge-offs and LIPs	0.00%
Credit-impaired acquired loans | Land - acquisition & development	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'
Amount of Loans, Net of LIP & Charge-Offs	2,393
Days Delinquent Based on $ Amount of Loans, Current	1,929
Days Delinquent Based on $ Amount of Loans, 30 Days	0
Days Delinquent Based on $ Amount of Loans, 60 Days	464
Days Delinquent Based on $ Amount of Loans, 90 Days	0
Days Delinquent Based on $ Amount of Loans, Total	464
Ratio of past due loans to total loans, net of charge-offs and LIPs	19.39%
Credit-impaired acquired loans | Land - consumer lot loans	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'
Amount of Loans, Net of LIP & Charge-Offs	0
Days Delinquent Based on $ Amount of Loans, Current	0
Days Delinquent Based on $ Amount of Loans, 30 Days	0
Days Delinquent Based on $ Amount of Loans, 60 Days	0
Days Delinquent Based on $ Amount of Loans, 90 Days	0
Days Delinquent Based on $ Amount of Loans, Total	0
Ratio of past due loans to total loans, net of charge-offs and LIPs	0.00%
Credit-impaired acquired loans | Multi-family	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'
Amount of Loans, Net of LIP & Charge-Offs	0
Days Delinquent Based on $ Amount of Loans, Current	0
Days Delinquent Based on $ Amount of Loans, 30 Days	0
Days Delinquent Based on $ Amount of Loans, 60 Days	0
Days Delinquent Based on $ Amount of Loans, 90 Days	0
Days Delinquent Based on $ Amount of Loans, Total	0
Ratio of past due loans to total loans, net of charge-offs and LIPs	0.00%
Credit-impaired acquired loans | Commercial real estate	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'
Amount of Loans, Net of LIP & Charge-Offs	83,116
Days Delinquent Based on $ Amount of Loans, Current	80,095
Days Delinquent Based on $ Amount of Loans, 30 Days	2,301
Days Delinquent Based on $ Amount of Loans, 60 Days	0
Days Delinquent Based on $ Amount of Loans, 90 Days	720
Days Delinquent Based on $ Amount of Loans, Total	3,021
Ratio of past due loans to total loans, net of charge-offs and LIPs	3.63%
Credit-impaired acquired loans | Commercial & industrial	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'
Amount of Loans, Net of LIP & Charge-Offs	1,705
Days Delinquent Based on $ Amount of Loans, Current	1,396
Days Delinquent Based on $ Amount of Loans, 30 Days	0
Days Delinquent Based on $ Amount of Loans, 60 Days	0
Days Delinquent Based on $ Amount of Loans, 90 Days	309
Days Delinquent Based on $ Amount of Loans, Total	309
Ratio of past due loans to total loans, net of charge-offs and LIPs	18.12%
Credit-impaired acquired loans | HELOC	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'
Amount of Loans, Net of LIP & Charge-Offs	11,266
Days Delinquent Based on $ Amount of Loans, Current	11,176
Days Delinquent Based on $ Amount of Loans, 30 Days	0
Days Delinquent Based on $ Amount of Loans, 60 Days	0
Days Delinquent Based on $ Amount of Loans, 90 Days	90
Days Delinquent Based on $ Amount of Loans, Total	90
Ratio of past due loans to total loans, net of charge-offs and LIPs	0.80%
Credit-impaired acquired loans | Consumer	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'
Amount of Loans, Net of LIP & Charge-Offs	71
Days Delinquent Based on $ Amount of Loans, Current	71
Days Delinquent Based on $ Amount of Loans, 30 Days	0
Days Delinquent Based on $ Amount of Loans, 60 Days	0
Days Delinquent Based on $ Amount of Loans, 90 Days	0
Days Delinquent Based on $ Amount of Loans, Total	$0
Ratio of past due loans to total loans, net of charge-offs and LIPs	0.00%

Loans_Receivable_excluding_Cov8

Loans Receivable (excluding Covered Loans) - Troubled Debt Restructurings and Loan Modifications (Details) (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Sep. 30, 2013	Sep. 30, 2012
	contract	contract
Financing Receivable, Modifications [Line Items]	'	'
Number of Contracts	453	889
Pre-Modification, Outstanding Recorded Investment	$123,463	$212,208
Post-Modification Outstanding Recorded Investment	123,463	212,208
Number of Contracts	83	135
Recorded Investment	20,139	25,833
Single-family residential	'	'
Financing Receivable, Modifications [Line Items]	'	'
Number of Contracts	406	787
Pre-Modification, Outstanding Recorded Investment	105,551	183,548
Post-Modification Outstanding Recorded Investment	105,551	183,548
Number of Contracts	78	123
Recorded Investment	17,120	24,431
Construction - speculative	'	'
Financing Receivable, Modifications [Line Items]	'	'
Number of Contracts	1	24
Pre-Modification, Outstanding Recorded Investment	2,470	6,703
Post-Modification Outstanding Recorded Investment	2,470	6,703
Number of Contracts	0	0
Recorded Investment	0	0
Construction - custom	'	'
Financing Receivable, Modifications [Line Items]	'	'
Number of Contracts	0	1
Pre-Modification, Outstanding Recorded Investment	0	1,196
Post-Modification Outstanding Recorded Investment	0	1,196
Number of Contracts	0	0
Recorded Investment	0	0
Land - acquisition & development	'	'
Financing Receivable, Modifications [Line Items]	'	'
Number of Contracts	1	26
Pre-Modification, Outstanding Recorded Investment	461	5,489
Post-Modification Outstanding Recorded Investment	461	5,489
Number of Contracts	0	0
Recorded Investment	0	0
Land - consumer lot loans	'	'
Financing Receivable, Modifications [Line Items]	'	'
Number of Contracts	25	38
Pre-Modification, Outstanding Recorded Investment	3,134	5,237
Post-Modification Outstanding Recorded Investment	3,134	5,237
Number of Contracts	2	12
Recorded Investment	237	1,402
Multi-family	'	'
Financing Receivable, Modifications [Line Items]	'	'
Number of Contracts	1	4
Pre-Modification, Outstanding Recorded Investment	36	3,104
Post-Modification Outstanding Recorded Investment	36	3,104
Number of Contracts	0	0
Recorded Investment	0	0
Commercial real estate	'	'
Financing Receivable, Modifications [Line Items]	'	'
Number of Contracts	15	4
Pre-Modification, Outstanding Recorded Investment	11,523	6,224
Post-Modification Outstanding Recorded Investment	11,523	6,224
Number of Contracts	2	0
Recorded Investment	2,703	0
Commercial & industrial	'	'
Financing Receivable, Modifications [Line Items]	'	'
Number of Contracts	1	0
Pre-Modification, Outstanding Recorded Investment	56	0
Post-Modification Outstanding Recorded Investment	56	0
Number of Contracts	0	0
Recorded Investment	0	0
HELOC	'	'
Financing Receivable, Modifications [Line Items]	'	'
Number of Contracts	1	5
Pre-Modification, Outstanding Recorded Investment	199	707
Post-Modification Outstanding Recorded Investment	199	707
Number of Contracts	1	0
Recorded Investment	79	0
Consumer	'	'
Financing Receivable, Modifications [Line Items]	'	'
Number of Contracts	2	0
Pre-Modification, Outstanding Recorded Investment	33	0
Post-Modification Outstanding Recorded Investment	33	0
Number of Contracts	0	0
Recorded Investment	$0	$0

Loans_Receivable_excluding_Cov9

Loans Receivable (excluding Covered Loans) - Changes in Accretable Yield for Acquired Impaired Loans (Details) (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Sep. 30, 2013	Sep. 30, 2012
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Accretable Yield Movement Schedule [Roll Forward]	'	'
Accretion	$1,086	$1,619
Credit-impaired acquired loans	'	'
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Accretable Yield Movement Schedule [Roll Forward]	'	'
Accretable Yield, Balance at beginning of period	16,928	0
Carrying Amount, Balance at beginning of period	77,613	0
Accretable Yield, Additions	0	21,384
Carrying Amount, Additions	9,865	93,691
Accretable Yield, Reclassifications from nonaccretable balance, net	30,026	0
Carrying Amount, Reclassifications from nonaccretable balance, net	0	0
Accretable Yield, Accretion	9,718	4,456
Accretion	9,718	4,456
Accretable Yield, Transfers to Real Estate Owned	0	0
Carrying Amount, Transfers to Real Estate Owned	3,975	2,616
Accretable Yield, Payments received, net	0	0
Carrying Amount, Payments received, net	23,503	17,918
Accretable Yield, Balance at end of period	37,236	16,928
Carrying Amount, Balance at end of period	69,718	77,613
Acquired non-impaired loans	'	'
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Accretable Yield Movement Schedule [Roll Forward]	'	'
Accretable Yield, Balance at beginning of period	0	0
Carrying Amount, Balance at beginning of period	0	0
Accretable Yield, Additions	10,804	0
Carrying Amount, Additions	351,335	0
Accretable Yield, Reclassifications from nonaccretable balance, net	0	0
Carrying Amount, Reclassifications from nonaccretable balance, net	0	0
Accretable Yield, Accretion	-5,827	0
Accretion	5,827	0
Accretable Yield, Transfers to Real Estate Owned	0	0
Carrying Amount, Transfers to Real Estate Owned	-7,755	0
Accretable Yield, Payments received, net	0	0
Carrying Amount, Payments received, net	-104,034	0
Accretable Yield, Balance at end of period	4,977	0
Carrying Amount, Balance at end of period	$245,373	$0

Recovered_Sheet1

Loans Receivable (excluding Covered Loans) - Schedule of Loans Acquired for Which Payment Collection Not Probable (Details) (Western National Bank, USD $)	Dec. 16, 2011
In Thousands, unless otherwise specified
Western National Bank	'
Business Acquisition [Line Items]	'
Contractually required payments of interest and principal	$171,515
Nonaccretable difference	-56,440
Cash flows expected to be collected	115,075	[1]
Accretable yield	-21,384
Carrying value of acquired loans	$93,691
[1]	Represents undiscounted expected principal and interest cash flows

Allowance_for_Losses_on_Loans_1

Allowance for Losses on Loans - Allowance for Losses on Loans (Details) (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Sep. 30, 2013	Sep. 30, 2012
Financing Receivable, Allowance for Credit Losses [Roll Forward]	'	'
Beginning Allowance	$133,147	$157,160
Charge-offs	-34,101	-84,579
Recoveries	16,345	14,857
Provisions & Transfers	1,350	45,709
Ending Allowance	116,741	133,147
Single-family residential	'	'
Financing Receivable, Allowance for Credit Losses [Roll Forward]	'	'
Beginning Allowance	81,815	83,307
Charge-offs	-20,947	-53,789
Recoveries	9,416	8,164
Provisions & Transfers	-6,100	44,133
Ending Allowance	64,184	81,815
Construction - speculative	'	'
Financing Receivable, Allowance for Credit Losses [Roll Forward]	'	'
Beginning Allowance	12,060	13,828
Charge-offs	-1,446	-4,916
Recoveries	501	711
Provisions & Transfers	-2,708	2,437
Ending Allowance	8,407	12,060
Construction - custom	'	'
Financing Receivable, Allowance for Credit Losses [Roll Forward]	'	'
Beginning Allowance	347	623
Charge-offs	-481	0
Recoveries	0	0
Provisions & Transfers	1,016	-276
Ending Allowance	882	347
Land - acquisition & development	'	'
Financing Receivable, Allowance for Credit Losses [Roll Forward]	'	'
Beginning Allowance	15,598	32,719
Charge-offs	-3,983	-16,978
Recoveries	4,105	1,341
Provisions & Transfers	-6,555	-1,484
Ending Allowance	9,165	15,598
Land - consumer lot loans	'	'
Financing Receivable, Allowance for Credit Losses [Roll Forward]	'	'
Beginning Allowance	4,937	5,520
Charge-offs	-1,363	-2,670
Recoveries	40	0
Provisions & Transfers	-62	2,087
Ending Allowance	3,552	4,937
Multi-family	'	'
Financing Receivable, Allowance for Credit Losses [Roll Forward]	'	'
Beginning Allowance	5,280	7,623
Charge-offs	-1,043	-1,393
Recoveries	171	504
Provisions & Transfers	-592	-1,454
Ending Allowance	3,816	5,280
Commercial real estate	'	'
Financing Receivable, Allowance for Credit Losses [Roll Forward]	'	'
Beginning Allowance	1,956	4,331
Charge-offs	-747	-814
Recoveries	17	225
Provisions & Transfers	4,369	-1,786
Ending Allowance	5,595	1,956
Commercial & industrial	'	'
Financing Receivable, Allowance for Credit Losses [Roll Forward]	'	'
Beginning Allowance	7,626	5,099
Charge-offs	-1,145	-249
Recoveries	95	2,366
Provisions & Transfers	10,038	410
Ending Allowance	16,614	7,626
HELOC	'	'
Financing Receivable, Allowance for Credit Losses [Roll Forward]	'	'
Beginning Allowance	965	1,139
Charge-offs	-163	-232
Recoveries	0	66
Provisions & Transfers	200	-8
Ending Allowance	1,002	965
Consumer	'	'
Financing Receivable, Allowance for Credit Losses [Roll Forward]	'	'
Beginning Allowance	2,563	2,971
Charge-offs	-2,783	-3,538
Recoveries	2,000	1,480
Provisions & Transfers	1,744	1,650
Ending Allowance	$3,524	$2,563

Allowance_for_Losses_on_Loans_2

Allowance for Losses on Loans - Narrative (Details) (USD $)

3 Months Ended

12 Months Ended

In Thousands, unless otherwise specified

Sep. 30, 2013

Jun. 30, 2013

Mar. 31, 2013

Dec. 31, 2012

Sep. 30, 2012

Jun. 30, 2012

Mar. 31, 2012

Dec. 31, 2011

Sep. 30, 2013

Sep. 30, 2012

Sep. 30, 2011

Financing Receivable, Allowance for Credit Losses [Line Items]

'

'

'

'

'

'

'

'

'

'

'

Provision for loan losses

($2,250)

$0

$0

$3,600

$5,379

$10,366

$18,000

$11,210

$1,350

$44,955

$93,104

Loans receivable, gross

7,990,545

'

'

'

7,866,336

'

'

'

7,990,545

7,866,336

'

Nonaccrual loans by portfolio segment

131,299

'

'

'

173,427

'

'

'

131,299

173,427

'

Allowance for credit losses, charge-offs, net of recoveries

'

'

'

'

'

'

'

'

17,756

69,721

'

Allowance for probable losses

116,741

'

'

'

133,147

'

'

'

116,741

133,147

157,160

Non-Performing Loans

'

'

'

'

'

'

'

'

'

'

'

Financing Receivable, Allowance for Credit Losses [Line Items]

'

'

'

'

'

'

'

'

'

'

'

Loans receivable, gross

213,616

'

'

'

272,905

'

'

'

213,616

272,905

'

Ratio of non-performing assets to total assets

1.63%

'

'

'

2.19%

'

'

'

1.63%

2.19%

'

Acquired loans subject to general allowance

13,800

'

'

'

'

'

'

'

13,800

'

'

Nonaccrual loans by portfolio segment

131,299

'

'

'

173,427

'

'

'

131,299

173,427

'

Increase (decrease) in non-accrual loans

-24.30%

'

'

'

'

'

'

'

-24.30%

'

'

Loans Collectively Evaluated for Impairment

'

'

'

'

'

'

'

'

'

'

'

Financing Receivable, Allowance for Credit Losses [Line Items]

'

'

'

'

'

'

'

'

'

'

'

Loans receivable, gross

7,495,504

[1]

'

'

'

7,520,864

[1]

'

'

'

7,495,504

[1]

7,520,864

[1]

'

Allowance for probable losses

113,268

'

'

'

117,164

'

'

'

113,268

117,164

'

Loans Individually Evaluated for Impairment

'

'

'

'

'

'

'

'

'

'

'

Financing Receivable, Allowance for Credit Losses [Line Items]

'

'

'

'

'

'

'

'

'

'

'

Loans receivable, gross

159,564

[1]

'

'

'

234,354

[1]

'

'

'

159,564

[1]

234,354

[1]

'

Allowance for probable losses

$3,473

'

'

'

$15,983

'

'

'

$3,473

$15,983

'

[1]

Excludes acquired loans with discounts sufficient to absorb potential losses and covered loans

Allowance_for_Losses_on_Loans_3

Allowance for Losses on Loans - Loans Collectively and Individually Evaluated for Impairment (Details) (USD $)	Sep. 30, 2013		Sep. 30, 2012		Sep. 30, 2011
In Thousands, unless otherwise specified
Financing Receivable, Allowance for Credit Losses [Line Items]	'		'		'
General/Specific Reserve Allocation	$116,741		$133,147		$157,160
Gross Loans Subject to General/Specific Reserve	7,990,545		7,866,336		'
Single-family residential	'		'		'
Financing Receivable, Allowance for Credit Losses [Line Items]	'		'		'
General/Specific Reserve Allocation	64,184		81,815		83,307
Gross Loans Subject to General/Specific Reserve	5,373,950		5,779,264		'
Construction - speculative	'		'		'
Financing Receivable, Allowance for Credit Losses [Line Items]	'		'		'
General/Specific Reserve Allocation	8,407		12,060		13,828
Gross Loans Subject to General/Specific Reserve	130,778		131,526		'
Construction - custom	'		'		'
Financing Receivable, Allowance for Credit Losses [Line Items]	'		'		'
General/Specific Reserve Allocation	882		347		623
Gross Loans Subject to General/Specific Reserve	302,722		211,690		'
Land - acquisition & development	'		'		'
Financing Receivable, Allowance for Credit Losses [Line Items]	'		'		'
General/Specific Reserve Allocation	9,165		15,598		32,719
Gross Loans Subject to General/Specific Reserve	81,660		128,379		'
Land - consumer lot loans	'		'		'
Financing Receivable, Allowance for Credit Losses [Line Items]	'		'		'
General/Specific Reserve Allocation	3,552		4,937		5,520
Gross Loans Subject to General/Specific Reserve	124,984		141,844		'
Multi-family	'		'		'
Financing Receivable, Allowance for Credit Losses [Line Items]	'		'		'
General/Specific Reserve Allocation	3,816		5,280		7,623
Gross Loans Subject to General/Specific Reserve	835,598		710,741		'
Commercial real estate	'		'		'
Financing Receivable, Allowance for Credit Losses [Line Items]	'		'		'
General/Specific Reserve Allocation	5,595		1,956		4,331
Gross Loans Subject to General/Specific Reserve	625,293		406,364		'
Commercial & industrial	'		'		'
Financing Receivable, Allowance for Credit Losses [Line Items]	'		'		'
General/Specific Reserve Allocation	16,614		7,626		5,099
Gross Loans Subject to General/Specific Reserve	326,450		166,115		'
HELOC	'		'		'
Financing Receivable, Allowance for Credit Losses [Line Items]	'		'		'
General/Specific Reserve Allocation	1,002		965		1,139
Gross Loans Subject to General/Specific Reserve	133,631		126,942		'
Consumer	'		'		'
Financing Receivable, Allowance for Credit Losses [Line Items]	'		'		'
General/Specific Reserve Allocation	3,524		2,563		2,971
Gross Loans Subject to General/Specific Reserve	55,479		63,471		'
Loans Collectively Evaluated for Impairment	'		'		'
Financing Receivable, Allowance for Credit Losses [Line Items]	'		'		'
General/Specific Reserve Allocation	113,268		117,164		'
Gross Loans Subject to General/Specific Reserve	7,495,504	[1]	7,520,864	[1]	'
Ratio	1.50%		1.60%		'
Loans Collectively Evaluated for Impairment | Single-family residential	'		'		'
Financing Receivable, Allowance for Credit Losses [Line Items]	'		'		'
General/Specific Reserve Allocation	64,184		81,737		'
Gross Loans Subject to General/Specific Reserve	5,262,159	[1]	5,694,337	[1]	'
Ratio	1.20%		1.40%		'
Loans Collectively Evaluated for Impairment | Construction - speculative	'		'		'
Financing Receivable, Allowance for Credit Losses [Line Items]	'		'		'
General/Specific Reserve Allocation	7,307		9,079		'
Gross Loans Subject to General/Specific Reserve	115,554	[1]	104,312	[1]	'
Ratio	6.30%		8.70%		'
Loans Collectively Evaluated for Impairment | Construction - custom	'		'		'
Financing Receivable, Allowance for Credit Losses [Line Items]	'		'		'
General/Specific Reserve Allocation	882		347		'
Gross Loans Subject to General/Specific Reserve	302,722	[1]	211,690	[1]	'
Ratio	0.30%		0.20%		'
Loans Collectively Evaluated for Impairment | Land - acquisition & development	'		'		'
Financing Receivable, Allowance for Credit Losses [Line Items]	'		'		'
General/Specific Reserve Allocation	6,943		6,697		'
Gross Loans Subject to General/Specific Reserve	67,521	[1]	47,294	[1]	'
Ratio	10.30%		14.20%		'
Loans Collectively Evaluated for Impairment | Land - consumer lot loans	'		'		'
Financing Receivable, Allowance for Credit Losses [Line Items]	'		'		'
General/Specific Reserve Allocation	3,506		4,176		'
Gross Loans Subject to General/Specific Reserve	107,216	[1]	138,666	[1]	'
Ratio	3.30%		3.00%		'
Loans Collectively Evaluated for Impairment | Multi-family	'		'		'
Financing Receivable, Allowance for Credit Losses [Line Items]	'		'		'
General/Specific Reserve Allocation	3,711		2,818		'
Gross Loans Subject to General/Specific Reserve	824,279	[1]	694,140	[1]	'
Ratio	0.50%		0.40%		'
Loans Collectively Evaluated for Impairment | Commercial real estate	'		'		'
Financing Receivable, Allowance for Credit Losses [Line Items]	'		'		'
General/Specific Reserve Allocation	5,595		1,158		'
Gross Loans Subject to General/Specific Reserve	400,789	[1]	292,550	[1]	'
Ratio	1.40%		0.40%		'
Loans Collectively Evaluated for Impairment | Commercial & industrial	'		'		'
Financing Receivable, Allowance for Credit Losses [Line Items]	'		'		'
General/Specific Reserve Allocation	16,614		7,624		'
Gross Loans Subject to General/Specific Reserve	256,954	[1]	161,689	[1]	'
Ratio	6.50%		4.70%		'
Loans Collectively Evaluated for Impairment | HELOC	'		'		'
Financing Receivable, Allowance for Credit Losses [Line Items]	'		'		'
General/Specific Reserve Allocation	1,002		965		'
Gross Loans Subject to General/Specific Reserve	111,169	[1]	112,812	[1]	'
Ratio	0.90%		0.90%		'
Loans Collectively Evaluated for Impairment | Consumer	'		'		'
Financing Receivable, Allowance for Credit Losses [Line Items]	'		'		'
General/Specific Reserve Allocation	3,524		2,563		'
Gross Loans Subject to General/Specific Reserve	47,141	[1]	63,374	[1]	'
Ratio	7.50%		4.00%		'
Loans Individually Evaluated for Impairment	'		'		'
Financing Receivable, Allowance for Credit Losses [Line Items]	'		'		'
General/Specific Reserve Allocation	3,473		15,983		'
Gross Loans Subject to General/Specific Reserve	159,564	[1]	234,354	[1]	'
Ratio	2.20%		6.80%		'
Loans Individually Evaluated for Impairment | Single-family residential	'		'		'
Financing Receivable, Allowance for Credit Losses [Line Items]	'		'		'
General/Specific Reserve Allocation	0		78		'
Gross Loans Subject to General/Specific Reserve	96,989	[1]	84,584	[1]	'
Ratio	0.00%		0.10%		'
Loans Individually Evaluated for Impairment | Construction - speculative	'		'		'
Financing Receivable, Allowance for Credit Losses [Line Items]	'		'		'
General/Specific Reserve Allocation	1,100		2,981		'
Gross Loans Subject to General/Specific Reserve	15,224	[1]	25,325	[1]	'
Ratio	7.20%		11.80%		'
Loans Individually Evaluated for Impairment | Construction - custom	'		'		'
Financing Receivable, Allowance for Credit Losses [Line Items]	'		'		'
General/Specific Reserve Allocation	0		0		'
Gross Loans Subject to General/Specific Reserve	0	[1]	0	[1]	'
Ratio	0.00%		0.00%		'
Loans Individually Evaluated for Impairment | Land - acquisition & development	'		'		'
Financing Receivable, Allowance for Credit Losses [Line Items]	'		'		'
General/Specific Reserve Allocation	2,222		8,901		'
Gross Loans Subject to General/Specific Reserve	10,254	[1]	77,383	[1]	'
Ratio	21.70%		11.50%		'
Loans Individually Evaluated for Impairment | Land - consumer lot loans	'		'		'
Financing Receivable, Allowance for Credit Losses [Line Items]	'		'		'
General/Specific Reserve Allocation	46		761		'
Gross Loans Subject to General/Specific Reserve	14,455	[1]	3,178	[1]	'
Ratio	0.30%		23.90%		'
Loans Individually Evaluated for Impairment | Multi-family	'		'		'
Financing Receivable, Allowance for Credit Losses [Line Items]	'		'		'
General/Specific Reserve Allocation	105		2,462		'
Gross Loans Subject to General/Specific Reserve	7,405	[1]	16,000	[1]	'
Ratio	1.40%		15.40%		'
Loans Individually Evaluated for Impairment | Commercial real estate	'		'		'
Financing Receivable, Allowance for Credit Losses [Line Items]	'		'		'
General/Specific Reserve Allocation	0		798		'
Gross Loans Subject to General/Specific Reserve	14,172	[1]	26,660	[1]	'
Ratio	0.00%		3.00%		'
Loans Individually Evaluated for Impairment | Commercial & industrial	'		'		'
Financing Receivable, Allowance for Credit Losses [Line Items]	'		'		'
General/Specific Reserve Allocation	0		2		'
Gross Loans Subject to General/Specific Reserve	48	[1]	1,134	[1]	'
Ratio	0.00%		0.20%		'
Loans Individually Evaluated for Impairment | HELOC	'		'		'
Financing Receivable, Allowance for Credit Losses [Line Items]	'		'		'
General/Specific Reserve Allocation	0		0		'
Gross Loans Subject to General/Specific Reserve	1,017	[1]	90	[1]	'
Ratio	0.00%		0.00%		'
Loans Individually Evaluated for Impairment | Consumer	'		'		'
Financing Receivable, Allowance for Credit Losses [Line Items]	'		'		'
General/Specific Reserve Allocation	0		0		'
Gross Loans Subject to General/Specific Reserve	$0	[1]	$0	[1]	'
Ratio	0.00%		0.00%		'
[1]	Excludes acquired loans with discounts sufficient to absorb potential losses and covered loans

Allowance_for_Losses_on_Loans_4

Allowance for Losses on Loans - Internally Assigned Grade (Details) (USD $)	Sep. 30, 2013	Sep. 30, 2012
In Thousands, unless otherwise specified
Financing Receivable, Recorded Investment [Line Items]	'	'
Loans receivable, gross	$7,990,545	$7,866,336
Single-family residential	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Loans receivable, gross	5,373,950	5,779,264
Construction - speculative	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Loans receivable, gross	130,778	131,526
Construction - custom	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Loans receivable, gross	302,722	211,690
Land - acquisition & development	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Loans receivable, gross	81,660	128,379
Land - consumer lot loans	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Loans receivable, gross	124,984	141,844
Multi-family	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Loans receivable, gross	835,598	710,741
Commercial real estate	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Loans receivable, gross	625,293	406,364
Commercial & industrial	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Loans receivable, gross	326,450	166,115
HELOC	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Loans receivable, gross	133,631	126,942
Consumer	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Loans receivable, gross	55,479	63,471
Non-acquired loans	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Loans receivable, gross	7,641,266	7,755,219
Non-acquired loans | Single-family residential	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Loans receivable, gross	5,359,149	5,778,922
Non-acquired loans | Construction - speculative	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Loans receivable, gross	130,778	129,637
Non-acquired loans | Construction - custom	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Loans receivable, gross	302,722	211,690
Non-acquired loans | Land - acquisition & development	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Loans receivable, gross	77,775	124,677
Non-acquired loans | Land - consumer lot loans	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Loans receivable, gross	121,671	141,844
Non-acquired loans | Multi-family	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Loans receivable, gross	831,684	710,140
Non-acquired loans | Commercial real estate	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Loans receivable, gross	414,961	319,210
Non-acquired loans | Commercial & industrial	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Loans receivable, gross	243,199	162,823
Non-acquired loans | HELOC	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Loans receivable, gross	112,186	112,902
Non-acquired loans | Consumer	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Loans receivable, gross	47,141	63,374
Acquired loans	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Loans receivable, gross	250,379	0
Acquired loans | Single-family residential	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Loans receivable, gross	14,468	0
Acquired loans | Construction - speculative	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Loans receivable, gross	0	0
Acquired loans | Construction - custom	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Loans receivable, gross	0	0
Acquired loans | Land - acquisition & development	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Loans receivable, gross	1,489	0
Acquired loans | Land - consumer lot loans	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Loans receivable, gross	3,313	0
Acquired loans | Multi-family	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Loans receivable, gross	3,914	0
Acquired loans | Commercial real estate	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Loans receivable, gross	133,423	0
Acquired loans | Commercial & industrial	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Loans receivable, gross	75,326	0
Acquired loans | HELOC	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Loans receivable, gross	10,179	0
Acquired loans | Consumer	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Loans receivable, gross	8,267	0
Credit-impaired acquired loans	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Loans receivable, gross	98,900	111,117
Credit-impaired acquired loans | Single-family residential	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Loans receivable, gross	333	342
Credit-impaired acquired loans | Construction - speculative	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Loans receivable, gross	0	1,889
Credit-impaired acquired loans | Construction - custom	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Loans receivable, gross	0	0
Credit-impaired acquired loans | Land - acquisition & development	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Loans receivable, gross	2,396	3,702
Credit-impaired acquired loans | Land - consumer lot loans	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Loans receivable, gross	0	0
Credit-impaired acquired loans | Multi-family	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Loans receivable, gross	0	601
Credit-impaired acquired loans | Commercial real estate	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Loans receivable, gross	76,909	87,154
Credit-impaired acquired loans | Commercial & industrial	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Loans receivable, gross	7,925	3,292
Credit-impaired acquired loans | HELOC	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Loans receivable, gross	11,266	14,040
Credit-impaired acquired loans | Consumer	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Loans receivable, gross	71	97
Credit-impaired acquired loans | Pool 1 - Construction and land A&D	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Loans receivable, gross	2,396	5,591
Credit-impaired acquired loans | Pool 2 - Single-family residential	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Loans receivable, gross	333	342
Credit-impaired acquired loans | Pool 3 - Multi-family	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Loans receivable, gross	0	601
Credit-impaired acquired loans | Pool 4 - HELOC & other consumer	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Loans receivable, gross	11,337	14,137
Credit-impaired acquired loans | Pool 5 - Commercial real estate	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Loans receivable, gross	76,909	87,154
Credit-impaired acquired loans | Pool 6 - Commercial & industrial	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Loans receivable, gross	7,925	3,292
Pass	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Loans receivable, gross	7,639,717	7,468,534
Grade as percentage of total gross assets	95.60%	94.90%
Pass | Non-acquired loans	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Loans receivable, gross	7,363,923	7,396,340
Pass | Non-acquired loans | Single-family residential	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Loans receivable, gross	5,184,101	5,588,252
Pass | Non-acquired loans | Construction - speculative	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Loans receivable, gross	99,436	86,126
Pass | Non-acquired loans | Construction - custom	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Loans receivable, gross	302,722	211,690
Pass | Non-acquired loans | Land - acquisition & development	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Loans receivable, gross	64,355	73,661
Pass | Non-acquired loans | Land - consumer lot loans	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Loans receivable, gross	121,039	140,006
Pass | Non-acquired loans | Multi-family	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Loans receivable, gross	819,911	684,649
Pass | Non-acquired loans | Commercial real estate	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Loans receivable, gross	373,012	278,022
Pass | Non-acquired loans | Commercial & industrial	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Loans receivable, gross	240,441	158,421
Pass | Non-acquired loans | HELOC	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Loans receivable, gross	112,186	112,902
Pass | Non-acquired loans | Consumer	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Loans receivable, gross	46,720	62,611
Pass | Acquired loans	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Loans receivable, gross	209,754	0
Pass | Acquired loans | Single-family residential	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Loans receivable, gross	14,468	0
Pass | Acquired loans | Construction - speculative	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Loans receivable, gross	0	0
Pass | Acquired loans | Construction - custom	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Loans receivable, gross	0	0
Pass | Acquired loans | Land - acquisition & development	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Loans receivable, gross	312	0
Pass | Acquired loans | Land - consumer lot loans	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Loans receivable, gross	3,313	0
Pass | Acquired loans | Multi-family	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Loans receivable, gross	3,227	0
Pass | Acquired loans | Commercial real estate	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Loans receivable, gross	105,055	0
Pass | Acquired loans | Commercial & industrial	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Loans receivable, gross	64,933	0
Pass | Acquired loans | HELOC	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Loans receivable, gross	10,179	0
Pass | Acquired loans | Consumer	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Loans receivable, gross	8,267	0
Pass | Credit-impaired acquired loans	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Loans receivable, gross	66,040	72,194
Pass | Credit-impaired acquired loans | Pool 1 - Construction and land A&D	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Loans receivable, gross	980	2,466
Pass | Credit-impaired acquired loans | Pool 2 - Single-family residential	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Loans receivable, gross	333	342
Pass | Credit-impaired acquired loans | Pool 3 - Multi-family	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Loans receivable, gross	0	0
Pass | Credit-impaired acquired loans | Pool 4 - HELOC & other consumer	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Loans receivable, gross	11,337	14,137
Pass | Credit-impaired acquired loans | Pool 5 - Commercial real estate	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Loans receivable, gross	52,509	53,683
Pass | Credit-impaired acquired loans | Pool 6 - Commercial & industrial	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Loans receivable, gross	881	1,566
Special mention	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Loans receivable, gross	42,499	42,988
Grade as percentage of total gross assets	0.50%	0.60%
Special mention | Non-acquired loans	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Loans receivable, gross	33,384	38,622
Special mention | Non-acquired loans | Single-family residential	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Loans receivable, gross	4,595	844
Special mention | Non-acquired loans | Construction - speculative	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Loans receivable, gross	3,199	10,113
Special mention | Non-acquired loans | Construction - custom	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Loans receivable, gross	0	0
Special mention | Non-acquired loans | Land - acquisition & development	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Loans receivable, gross	775	4,637
Special mention | Non-acquired loans | Land - consumer lot loans	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Loans receivable, gross	0	223
Special mention | Non-acquired loans | Multi-family	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Loans receivable, gross	2,114	5,098
Special mention | Non-acquired loans | Commercial real estate	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Loans receivable, gross	21,652	16,282
Special mention | Non-acquired loans | Commercial & industrial	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Loans receivable, gross	1,049	1,071
Special mention | Non-acquired loans | HELOC	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Loans receivable, gross	0	0
Special mention | Non-acquired loans | Consumer	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Loans receivable, gross	0	354
Special mention | Acquired loans	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Loans receivable, gross	5,499	0
Special mention | Acquired loans | Single-family residential	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Loans receivable, gross	0	0
Special mention | Acquired loans | Construction - speculative	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Loans receivable, gross	0	0
Special mention | Acquired loans | Construction - custom	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Loans receivable, gross	0	0
Special mention | Acquired loans | Land - acquisition & development	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Loans receivable, gross	0	0
Special mention | Acquired loans | Land - consumer lot loans	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Loans receivable, gross	0	0
Special mention | Acquired loans | Multi-family	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Loans receivable, gross	0	0
Special mention | Acquired loans | Commercial real estate	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Loans receivable, gross	4,190	0
Special mention | Acquired loans | Commercial & industrial	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Loans receivable, gross	1,309	0
Special mention | Acquired loans | HELOC	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Loans receivable, gross	0	0
Special mention | Acquired loans | Consumer	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Loans receivable, gross	0	0
Special mention | Credit-impaired acquired loans	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Loans receivable, gross	3,616	4,366
Special mention | Credit-impaired acquired loans | Pool 1 - Construction and land A&D	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Loans receivable, gross	461	0
Special mention | Credit-impaired acquired loans | Pool 2 - Single-family residential	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Loans receivable, gross	0	0
Special mention | Credit-impaired acquired loans | Pool 3 - Multi-family	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Loans receivable, gross	0	0
Special mention | Credit-impaired acquired loans | Pool 4 - HELOC & other consumer	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Loans receivable, gross	0	0
Special mention | Credit-impaired acquired loans | Pool 5 - Commercial real estate	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Loans receivable, gross	3,155	4,308
Special mention | Credit-impaired acquired loans | Pool 6 - Commercial & industrial	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Loans receivable, gross	0	58
Substandard	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Loans receivable, gross	308,329	352,916
Grade as percentage of total gross assets	3.90%	4.50%
Substandard | Non-acquired loans	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Loans receivable, gross	243,959	320,257
Substandard | Non-acquired loans | Single-family residential	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Loans receivable, gross	170,453	189,826
Substandard | Non-acquired loans | Construction - speculative	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Loans receivable, gross	28,143	33,398
Substandard | Non-acquired loans | Construction - custom	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Loans receivable, gross	0	0
Substandard | Non-acquired loans | Land - acquisition & development	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Loans receivable, gross	12,645	46,379
Substandard | Non-acquired loans | Land - consumer lot loans	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Loans receivable, gross	632	1,615
Substandard | Non-acquired loans | Multi-family	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Loans receivable, gross	9,659	20,393
Substandard | Non-acquired loans | Commercial real estate	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Loans receivable, gross	20,297	24,906
Substandard | Non-acquired loans | Commercial & industrial	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Loans receivable, gross	1,709	3,331
Substandard | Non-acquired loans | HELOC	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Loans receivable, gross	0	0
Substandard | Non-acquired loans | Consumer	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Loans receivable, gross	421	409
Substandard | Acquired loans	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Loans receivable, gross	35,126	0
Substandard | Acquired loans | Single-family residential	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Loans receivable, gross	0	0
Substandard | Acquired loans | Construction - speculative	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Loans receivable, gross	0	0
Substandard | Acquired loans | Construction - custom	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Loans receivable, gross	0	0
Substandard | Acquired loans | Land - acquisition & development	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Loans receivable, gross	1,177	0
Substandard | Acquired loans | Land - consumer lot loans	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Loans receivable, gross	0	0
Substandard | Acquired loans | Multi-family	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Loans receivable, gross	687	0
Substandard | Acquired loans | Commercial real estate	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Loans receivable, gross	24,178	0
Substandard | Acquired loans | Commercial & industrial	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Loans receivable, gross	9,084	0
Substandard | Acquired loans | HELOC	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Loans receivable, gross	0	0
Substandard | Acquired loans | Consumer	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Loans receivable, gross	0	0
Substandard | Credit-impaired acquired loans	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Loans receivable, gross	29,244	32,659
Substandard | Credit-impaired acquired loans | Pool 1 - Construction and land A&D	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Loans receivable, gross	955	3,125
Substandard | Credit-impaired acquired loans | Pool 2 - Single-family residential	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Loans receivable, gross	0	0
Substandard | Credit-impaired acquired loans | Pool 3 - Multi-family	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Loans receivable, gross	0	601
Substandard | Credit-impaired acquired loans | Pool 4 - HELOC & other consumer	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Loans receivable, gross	0	0
Substandard | Credit-impaired acquired loans | Pool 5 - Commercial real estate	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Loans receivable, gross	21,245	28,200
Substandard | Credit-impaired acquired loans | Pool 6 - Commercial & industrial	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Loans receivable, gross	7,044	733
Doubtful	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Loans receivable, gross	0	1,898
Grade as percentage of total gross assets	0.00%	0.00%
Doubtful | Non-acquired loans	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Loans receivable, gross	0	0
Doubtful | Non-acquired loans | Single-family residential	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Loans receivable, gross	0	0
Doubtful | Non-acquired loans | Construction - speculative	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Loans receivable, gross	0	0
Doubtful | Non-acquired loans | Construction - custom	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Loans receivable, gross	0	0
Doubtful | Non-acquired loans | Land - acquisition & development	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Loans receivable, gross	0	0
Doubtful | Non-acquired loans | Land - consumer lot loans	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Loans receivable, gross	0	0
Doubtful | Non-acquired loans | Multi-family	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Loans receivable, gross	0	0
Doubtful | Non-acquired loans | Commercial real estate	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Loans receivable, gross	0	0
Doubtful | Non-acquired loans | Commercial & industrial	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Loans receivable, gross	0	0
Doubtful | Non-acquired loans | HELOC	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Loans receivable, gross	0	0
Doubtful | Non-acquired loans | Consumer	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Loans receivable, gross	0	0
Doubtful | Acquired loans	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Loans receivable, gross	0	0
Doubtful | Acquired loans | Single-family residential	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Loans receivable, gross	0	0
Doubtful | Acquired loans | Construction - speculative	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Loans receivable, gross	0	0
Doubtful | Acquired loans | Construction - custom	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Loans receivable, gross	0	0
Doubtful | Acquired loans | Land - acquisition & development	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Loans receivable, gross	0	0
Doubtful | Acquired loans | Land - consumer lot loans	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Loans receivable, gross	0	0
Doubtful | Acquired loans | Multi-family	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Loans receivable, gross	0	0
Doubtful | Acquired loans | Commercial real estate	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Loans receivable, gross	0	0
Doubtful | Acquired loans | Commercial & industrial	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Loans receivable, gross	0	0
Doubtful | Acquired loans | HELOC	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Loans receivable, gross	0	0
Doubtful | Acquired loans | Consumer	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Loans receivable, gross	0	0
Doubtful | Credit-impaired acquired loans	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Loans receivable, gross	0	1,898
Doubtful | Credit-impaired acquired loans | Pool 1 - Construction and land A&D	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Loans receivable, gross	0	0
Doubtful | Credit-impaired acquired loans | Pool 2 - Single-family residential	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Loans receivable, gross	0	0
Doubtful | Credit-impaired acquired loans | Pool 3 - Multi-family	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Loans receivable, gross	0	0
Doubtful | Credit-impaired acquired loans | Pool 4 - HELOC & other consumer	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Loans receivable, gross	0	0
Doubtful | Credit-impaired acquired loans | Pool 5 - Commercial real estate	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Loans receivable, gross	0	963
Doubtful | Credit-impaired acquired loans | Pool 6 - Commercial & industrial	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Loans receivable, gross	0	935
Loss	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Loans receivable, gross	0	0
Grade as percentage of total gross assets	0.00%	0.00%
Loss | Non-acquired loans	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Loans receivable, gross	0	0
Loss | Non-acquired loans | Single-family residential	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Loans receivable, gross	0	0
Loss | Non-acquired loans | Construction - speculative	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Loans receivable, gross	0	0
Loss | Non-acquired loans | Construction - custom	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Loans receivable, gross	0	0
Loss | Non-acquired loans | Land - acquisition & development	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Loans receivable, gross	0	0
Loss | Non-acquired loans | Land - consumer lot loans	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Loans receivable, gross	0	0
Loss | Non-acquired loans | Multi-family	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Loans receivable, gross	0	0
Loss | Non-acquired loans | Commercial real estate	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Loans receivable, gross	0	0
Loss | Non-acquired loans | Commercial & industrial	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Loans receivable, gross	0	0
Loss | Non-acquired loans | HELOC	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Loans receivable, gross	0	0
Loss | Non-acquired loans | Consumer	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Loans receivable, gross	0	0
Loss | Acquired loans	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Loans receivable, gross	0	0
Loss | Acquired loans | Single-family residential	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Loans receivable, gross	0	0
Loss | Acquired loans | Construction - speculative	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Loans receivable, gross	0	0
Loss | Acquired loans | Construction - custom	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Loans receivable, gross	0	0
Loss | Acquired loans | Land - acquisition & development	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Loans receivable, gross	0	0
Loss | Acquired loans | Land - consumer lot loans	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Loans receivable, gross	0	0
Loss | Acquired loans | Multi-family	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Loans receivable, gross	0	0
Loss | Acquired loans | Commercial real estate	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Loans receivable, gross	0	0
Loss | Acquired loans | Commercial & industrial	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Loans receivable, gross	0	0
Loss | Acquired loans | HELOC	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Loans receivable, gross	0	0
Loss | Acquired loans | Consumer	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Loans receivable, gross	0	0
Loss | Credit-impaired acquired loans	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Loans receivable, gross	0	0
Loss | Credit-impaired acquired loans | Pool 1 - Construction and land A&D	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Loans receivable, gross	0	0
Loss | Credit-impaired acquired loans | Pool 2 - Single-family residential	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Loans receivable, gross	0	0
Loss | Credit-impaired acquired loans | Pool 3 - Multi-family	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Loans receivable, gross	0	0
Loss | Credit-impaired acquired loans | Pool 4 - HELOC & other consumer	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Loans receivable, gross	0	0
Loss | Credit-impaired acquired loans | Pool 5 - Commercial real estate	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Loans receivable, gross	0	0
Loss | Credit-impaired acquired loans | Pool 6 - Commercial & industrial	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Loans receivable, gross	$0	$0

Allowance_for_Losses_on_Loans_5

Allowance for Losses on Loans - Credit Risk Profile Based on Payment Activity (Details) (USD $)	Sep. 30, 2013	Sep. 30, 2012
In Thousands, unless otherwise specified
Financing Receivable, Recorded Investment [Line Items]	'	'
Loans receivable, gross	$7,990,545	$7,866,336
Nonaccrual loans by portfolio segment	131,299	173,427
Single-family residential	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Loans receivable, gross	5,373,950	5,779,264
Nonaccrual loans by portfolio segment	100,460	131,193
Construction - speculative	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Loans receivable, gross	130,778	131,526
Nonaccrual loans by portfolio segment	4,560	10,634
Construction - custom	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Loans receivable, gross	302,722	211,690
Nonaccrual loans by portfolio segment	0	539
Land - acquisition & development	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Loans receivable, gross	81,660	128,379
Nonaccrual loans by portfolio segment	2,903	13,477
Land - consumer lot loans	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Loans receivable, gross	124,984	141,844
Nonaccrual loans by portfolio segment	3,337	5,149
Multi-family	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Loans receivable, gross	835,598	710,741
Nonaccrual loans by portfolio segment	6,573	4,185
Commercial real estate	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Loans receivable, gross	625,293	406,364
Nonaccrual loans by portfolio segment	11,736	7,653
Commercial & industrial	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Loans receivable, gross	326,450	166,115
Nonaccrual loans by portfolio segment	477	16
HELOC	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Loans receivable, gross	133,631	126,942
Nonaccrual loans by portfolio segment	263	198
Consumer	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Loans receivable, gross	55,479	63,471
Nonaccrual loans by portfolio segment	990	383
Performing Loans	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Loans receivable, gross	7,509,967	7,581,792
Grade as percentage of total gross assets	98.30%	97.80%
Performing Loans | Single-family residential	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Loans receivable, gross	5,258,688	5,647,729
Grade as percentage of total gross assets	98.10%	97.70%
Performing Loans | Construction - speculative	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Loans receivable, gross	126,218	119,003
Grade as percentage of total gross assets	96.50%	91.80%
Performing Loans | Construction - custom	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Loans receivable, gross	302,722	211,151
Grade as percentage of total gross assets	100.00%	99.70%
Performing Loans | Land - acquisition & development	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Loans receivable, gross	74,872	111,200
Grade as percentage of total gross assets	96.30%	89.20%
Performing Loans | Land - consumer lot loans	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Loans receivable, gross	118,334	136,695
Grade as percentage of total gross assets	97.30%	96.40%
Performing Loans | Multi-family	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Loans receivable, gross	825,111	705,955
Grade as percentage of total gross assets	99.20%	99.40%
Performing Loans | Commercial real estate	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Loans receivable, gross	389,423	311,557
Grade as percentage of total gross assets	97.10%	97.60%
Performing Loans | Commercial & industrial	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Loans receivable, gross	256,525	162,807
Grade as percentage of total gross assets	99.80%	100.00%
Performing Loans | HELOC	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Loans receivable, gross	111,923	112,704
Grade as percentage of total gross assets	99.80%	99.80%
Performing Loans | Consumer	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Loans receivable, gross	46,151	62,991
Grade as percentage of total gross assets	97.90%	99.40%
Non-Performing Loans	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Loans receivable, gross	213,616	272,905
Nonaccrual loans by portfolio segment	131,299	173,427
Percentage of Total Gross Loans	1.70%	2.20%
Non-Performing Loans | Single-family residential	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Nonaccrual loans by portfolio segment	100,460	131,193
Percentage of Total Gross Loans	1.90%	2.30%
Non-Performing Loans | Construction - speculative	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Nonaccrual loans by portfolio segment	4,560	10,634
Percentage of Total Gross Loans	3.50%	8.20%
Non-Performing Loans | Construction - custom	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Nonaccrual loans by portfolio segment	0	539
Percentage of Total Gross Loans	0.00%	0.30%
Non-Performing Loans | Land - acquisition & development	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Nonaccrual loans by portfolio segment	2,903	13,477
Percentage of Total Gross Loans	3.70%	10.80%
Non-Performing Loans | Land - consumer lot loans	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Nonaccrual loans by portfolio segment	3,337	5,149
Percentage of Total Gross Loans	2.70%	3.60%
Non-Performing Loans | Multi-family	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Nonaccrual loans by portfolio segment	6,573	4,185
Percentage of Total Gross Loans	0.80%	0.60%
Non-Performing Loans | Commercial real estate	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Nonaccrual loans by portfolio segment	11,736	7,653
Percentage of Total Gross Loans	2.90%	2.40%
Non-Performing Loans | Commercial & industrial	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Nonaccrual loans by portfolio segment	477	16
Percentage of Total Gross Loans	0.20%	0.00%
Non-Performing Loans | HELOC	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Nonaccrual loans by portfolio segment	263	198
Percentage of Total Gross Loans	0.20%	0.20%
Non-Performing Loans | Consumer	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Nonaccrual loans by portfolio segment	$990	$383
Percentage of Total Gross Loans	2.10%	0.60%

Allowance_for_Losses_on_Loans_6

Allowance for Losses on Loans - Impaired Loans Based on Loan Types (Details) (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Sep. 30, 2013		Sep. 30, 2012
Financing Receivable, Impaired [Line Items]	'		'
Recorded Investment	$454,557		$565,553
Unpaid Principal Balance	510,623		617,765
Related Allowance	18,610	[1]	41,628	[1]
Average Recorded Investment	425,267		471,396
Amount of related allowance included in specific reserves	3,473		15,983
Amount of related allowance included in general reserves	15,137		25,645
Single-family residential	'		'
Financing Receivable, Impaired [Line Items]	'		'
Recorded Investment	369,023		424,856
Unpaid Principal Balance	380,838		442,243
Related Allowance	15,137		25,723
Average Recorded Investment	351,865		354,874
Construction - speculative	'		'
Financing Receivable, Impaired [Line Items]	'		'
Recorded Investment	12,783		26,562
Unpaid Principal Balance	13,441		29,404
Related Allowance	1,100		2,981
Average Recorded Investment	15,701		26,403
Construction - custom	'		'
Financing Receivable, Impaired [Line Items]	'		'
Recorded Investment	0		0
Unpaid Principal Balance	0		0
Related Allowance	0		0
Average Recorded Investment	0		0
Land - acquisition & development	'		'
Financing Receivable, Impaired [Line Items]	'		'
Recorded Investment	5,618		38,750
Unpaid Principal Balance	14,707		50,959
Related Allowance	0		8,901
Average Recorded Investment	10,863		38,067
Land - consumer lot loans	'		'
Financing Receivable, Impaired [Line Items]	'		'
Recorded Investment	15,817		15,558
Unpaid Principal Balance	16,390		16,066
Related Allowance	2,222		761
Average Recorded Investment	14,140		13,613
Multi-family	'		'
Financing Receivable, Impaired [Line Items]	'		'
Recorded Investment	10,887		22,945
Unpaid Principal Balance	11,107		23,546
Related Allowance	46		2,462
Average Recorded Investment	9,465		21,214
Commercial real estate	'		'
Financing Receivable, Impaired [Line Items]	'		'
Recorded Investment	31,076		34,912
Unpaid Principal Balance	40,352		46,378
Related Allowance	105		798
Average Recorded Investment	18,972		15,843
Commercial & industrial	'		'
Financing Receivable, Impaired [Line Items]	'		'
Recorded Investment	7,335		1,146
Unpaid Principal Balance	31,253		7,365
Related Allowance	0		2
Average Recorded Investment	3,134		603
HELOC	'		'
Financing Receivable, Impaired [Line Items]	'		'
Recorded Investment	1,384		824
Unpaid Principal Balance	1,884		1,800
Related Allowance	0		0
Average Recorded Investment	991		779
Consumer	'		'
Financing Receivable, Impaired [Line Items]	'		'
Recorded Investment	634		0
Unpaid Principal Balance	651		4
Related Allowance	0		0
Average Recorded Investment	136		0
No Allowance Recorded	'		'
Financing Receivable, Impaired [Line Items]	'		'
Recorded Investment	80,772		181,576
Unpaid Principal Balance	126,674		233,384
Related Allowance	0		0
Average Recorded Investment	43,952		100,507
No Allowance Recorded | Single-family residential	'		'
Financing Receivable, Impaired [Line Items]	'		'
Recorded Investment	33,883		106,955
Unpaid Principal Balance	38,928		124,342
Related Allowance	0		0
Average Recorded Investment	21,458		49,524
No Allowance Recorded | Construction - speculative	'		'
Financing Receivable, Impaired [Line Items]	'		'
Recorded Investment	3,891		13,726
Unpaid Principal Balance	4,099		16,568
Related Allowance	0		0
Average Recorded Investment	3,339		13,581
No Allowance Recorded | Construction - custom	'		'
Financing Receivable, Impaired [Line Items]	'		'
Recorded Investment	0		0
Unpaid Principal Balance	0		0
Related Allowance	0		0
Average Recorded Investment	0		0
No Allowance Recorded | Land - acquisition & development	'		'
Financing Receivable, Impaired [Line Items]	'		'
Recorded Investment	3,020		18,000
Unpaid Principal Balance	10,705		30,209
Related Allowance	0		0
Average Recorded Investment	2,548		16,417
No Allowance Recorded | Land - consumer lot loans	'		'
Financing Receivable, Impaired [Line Items]	'		'
Recorded Investment	3,186		1,677
Unpaid Principal Balance	3,376		2,185
Related Allowance	0		0
Average Recorded Investment	1,839		487
No Allowance Recorded | Multi-family	'		'
Financing Receivable, Impaired [Line Items]	'		'
Recorded Investment	4,929		8,792
Unpaid Principal Balance	4,929		8,991
Related Allowance	0		0
Average Recorded Investment	1,734		6,935
No Allowance Recorded | Commercial real estate	'		'
Financing Receivable, Impaired [Line Items]	'		'
Recorded Investment	23,537		31,190
Unpaid Principal Balance	31,876		42,656
Related Allowance	0		0
Average Recorded Investment	9,651		12,946
No Allowance Recorded | Commercial & industrial	'		'
Financing Receivable, Impaired [Line Items]	'		'
Recorded Investment	7,279		1,146
Unpaid Principal Balance	31,197		7,363
Related Allowance	0		0
Average Recorded Investment	3,123		581
No Allowance Recorded | HELOC	'		'
Financing Receivable, Impaired [Line Items]	'		'
Recorded Investment	446		90
Unpaid Principal Balance	946		1,066
Related Allowance	0		0
Average Recorded Investment	133		36
No Allowance Recorded | Consumer	'		'
Financing Receivable, Impaired [Line Items]	'		'
Recorded Investment	601		0
Unpaid Principal Balance	618		4
Related Allowance	0		0
Average Recorded Investment	127		0
Allowance Recorded	'		'
Financing Receivable, Impaired [Line Items]	'		'
Recorded Investment	373,785		383,977
Unpaid Principal Balance	383,949		384,381
Related Allowance	18,610	[1]	41,628	[1]
Average Recorded Investment	381,315		370,889
Allowance Recorded | Single-family residential	'		'
Financing Receivable, Impaired [Line Items]	'		'
Recorded Investment	335,140		317,901
Unpaid Principal Balance	341,910		317,901
Related Allowance	15,137		25,723
Average Recorded Investment	330,407		305,350
Allowance Recorded | Construction - speculative	'		'
Financing Receivable, Impaired [Line Items]	'		'
Recorded Investment	8,892		12,836
Unpaid Principal Balance	9,342		12,836
Related Allowance	1,100		2,981
Average Recorded Investment	12,362		12,822
Allowance Recorded | Construction - custom	'		'
Financing Receivable, Impaired [Line Items]	'		'
Recorded Investment	0		0
Unpaid Principal Balance	0		0
Related Allowance	0		0
Average Recorded Investment	0		0
Allowance Recorded | Land - acquisition & development	'		'
Financing Receivable, Impaired [Line Items]	'		'
Recorded Investment	2,598		20,750
Unpaid Principal Balance	4,002		20,750
Related Allowance	0		8,901
Average Recorded Investment	8,315		21,650
Allowance Recorded | Land - consumer lot loans	'		'
Financing Receivable, Impaired [Line Items]	'		'
Recorded Investment	12,631		13,881
Unpaid Principal Balance	13,014		13,881
Related Allowance	2,222		761
Average Recorded Investment	12,301		13,126
Allowance Recorded | Multi-family	'		'
Financing Receivable, Impaired [Line Items]	'		'
Recorded Investment	5,958		14,153
Unpaid Principal Balance	6,178		14,555
Related Allowance	46		2,462
Average Recorded Investment	7,731		14,279
Allowance Recorded | Commercial real estate	'		'
Financing Receivable, Impaired [Line Items]	'		'
Recorded Investment	7,539		3,722
Unpaid Principal Balance	8,476		3,722
Related Allowance	105		798
Average Recorded Investment	9,321		2,897
Allowance Recorded | Commercial & industrial	'		'
Financing Receivable, Impaired [Line Items]	'		'
Recorded Investment	56		0
Unpaid Principal Balance	56		2
Related Allowance	0		2
Average Recorded Investment	11		22
Allowance Recorded | HELOC	'		'
Financing Receivable, Impaired [Line Items]	'		'
Recorded Investment	938		734
Unpaid Principal Balance	938		734
Related Allowance	0		0
Average Recorded Investment	858		743
Allowance Recorded | Consumer	'		'
Financing Receivable, Impaired [Line Items]	'		'
Recorded Investment	33		0
Unpaid Principal Balance	33		0
Related Allowance	0		0
Average Recorded Investment	$9		$0
[1]	Includes $3,473,000 of specific reserves and $15,137,000 included in the general reserves.

Interest_Receivable_Details

Interest Receivable (Details) (USD $)	Sep. 30, 2013	Sep. 30, 2012
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Interest receivable	$49,218,000	$46,857,000
Loans receivable	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Interest receivable	41,043,000	40,600,000
Mortgage-backed securities	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Interest receivable	6,428,000	5,187,000
Investment securities	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Interest receivable	1,747,000	1,070,000
Interest rate swap agreements	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Interest receivable	$182,000	'

Premises_and_Equipment_Details

Premises and Equipment (Details) (USD $)	12 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2011
Property, Plant and Equipment [Line Items]	'	'	'
Premises and equipment, gross	$270,591,000	$237,584,000	'
Less accumulated depreciation and amortization	-64,419,000	-58,739,000	'
Premises and equipment, net	206,172,000	178,845,000	'
Future minimum payments due, current	4,200,000	'	'
Future minimum payments due, two years	3,500,000	'	'
Future minimum payments due, three years	2,500,000	'	'
Future minimum payments due, four years	1,800,000	'	'
Future minimum payments due, five years and thereafter	6,600,000	'	'
Rental expense	4,680,000	3,825,000	3,083,000
Land	'	'	'
Property, Plant and Equipment [Line Items]	'	'	'
Premises and equipment, gross	92,560,000	82,426,000	'
Buildings	'	'	'
Property, Plant and Equipment [Line Items]	'	'	'
Premises and equipment, gross	132,822,000	114,106,000	'
Leasehold improvements	'	'	'
Property, Plant and Equipment [Line Items]	'	'	'
Premises and equipment, gross	8,411,000	7,530,000	'
Furniture, fixtures and equipment	'	'	'
Property, Plant and Equipment [Line Items]	'	'	'
Premises and equipment, gross	$36,798,000	$33,522,000	'
Minimum | Buildings	'	'	'
Property, Plant and Equipment [Line Items]	'	'	'
Estimated useful life, minimum	'25 years	'	'
Minimum | Leasehold improvements	'	'	'
Property, Plant and Equipment [Line Items]	'	'	'
Estimated useful life, minimum	'7 years	'	'
Minimum | Furniture, fixtures and equipment	'	'	'
Property, Plant and Equipment [Line Items]	'	'	'
Estimated useful life, minimum	'2 years	'	'
Maximum | Buildings	'	'	'
Property, Plant and Equipment [Line Items]	'	'	'
Estimated useful life, minimum	'40 years	'	'
Maximum | Leasehold improvements	'	'	'
Property, Plant and Equipment [Line Items]	'	'	'
Estimated useful life, minimum	'15 years	'	'
Maximum | Furniture, fixtures and equipment	'	'	'
Property, Plant and Equipment [Line Items]	'	'	'
Estimated useful life, minimum	'10 years	'	'

Customer_Accounts_Details

Customer Accounts (Details) (USD $)	Sep. 30, 2013	Sep. 30, 2012
In Thousands, unless otherwise specified
Banking and Thrift [Abstract]	'	'
Checking accounts, .15% and under	$1,247,885	$894,639
Passbook and statement accounts, .20% and under	404,937	314,634
Insured money market accounts, .01% to .30%	1,888,020	1,737,180
Certificate accounts	'	'
Less than 2.00%	4,716,427	4,308,341
2.00% to 2.99%	631,256	841,520
3.00% to 3.99%	175,549	381,324
4.00% to 4.99%	25,335	98,119
5.00% to 5.99%	862	861
Total certificates	5,549,429	5,630,165
Customer accounts	9,090,271	8,576,618
Within 1 year	3,642,142	3,556,701
1 to 2 years	789,037	1,013,450
2 to 3 years	406,960	425,559
Over 3 years	711,290	634,455
Customer Accounts Greater than $250,000	$1,336,054	$1,036,388

Customer_Accounts_Interest_Exp

Customer Accounts Interest Expense on Customer Accounts (Details) (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2011
Banking and Thrift [Abstract]	'	'	'
Checking accounts	$936	$857	$1,908
Passbook and statement accounts	566	574	682
Insured money market accounts	4,280	4,609	7,148
Certificate accounts	62,669	81,506	106,878
Interest expense on customer accounts, gross	68,451	87,546	116,616
Less early withdrawal penalties	-548	-607	-781
Interest expense on customer accounts	$67,903	$86,939	$115,835
Weighted average interest rate at end of year	0.69%	0.90%	1.14%
Weighted daily average interest rate during the year	0.75%	0.99%	1.32%

FHLB_Advances_and_Other_Borrow2

FHLB Advances and Other Borrowings - FHLB Advances (Details) (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2011
Banking and Thrift [Abstract]	'	'	'
Within 1 year	$0	$0	'
1 to 3 years	350,000	100,000	'
4 to 5 years	850,000	500,000	'
More than 5 years	730,000	1,280,000	'
Advances that are callable	175,000	450,000	'
Within 1 year	175,000	275,000	'
1 to 3 years	350,000	275,000	'
4 to 5 years	775,000	500,000	'
More than 5 years	630,000	830,000	'
FHLB advances	1,930,000	1,880,000	'
Weighted average interest rate at end of year	3.52%	3.60%	4.10%
Weighted daily average interest rate during the year	3.57%	4.14%	4.35%
Daily average of FHLB advances	1,905,479	1,949,019	1,883,135
Maximum amount of FHLB advances at any month end	1,930,000	1,961,895	1,962,616
Interest expense during the year (excludes interest rate swap expense)	$68,075	$80,617	$81,994
Credit line total percentage of assets	50.00%	'	'

FHLB_Advances_and_Other_Borrow3

FHLB Advances and Other Borrowings - Other Borrowings (Details) (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2011
Debt Disclosure [Abstract]	'	'	'
Other borrowings	$0	$0	'
Repurchase agreements with customers	0	0	'
Weighted average interest rate at end of year	0.00%	0.00%	3.90%
Weighted daily average interest rate during the year	0.00%	3.71%	3.73%
Daily average of securities sold under agreements to repurchase	0	692,896	800,000
Maximum securities sold under agreements to repurchase at any month end	0	800,000	800,000
Interest expense during the year	$0	$25,693	$29,867

Derivatives_and_Hedging_Activi2

Derivatives and Hedging Activities (Details) (USD $)	12 Months Ended
	Sep. 30, 2013
Interest rate swap agreements	'
Derivative [Line Items]	'
Notional amount	$83,593,679
Impact to the statement of operations	0
Fee income	552,609
Interest rate contracts | Other assets	'
Derivative [Line Items]	'
Asset Derivatives, Fair Value	7,000
Interest rate contracts | Other liabilities	'
Derivative [Line Items]	'
Liability Derivatives, Fair Value	7,000
Commitments to purchase MBS | AFS securities	'
Derivative [Line Items]	'
Notional amount	200,000,000
Asset Derivatives, Fair Value	$3,188,000

Income_Taxes_Narrative_Details

Income Taxes - Narrative (Details) (USD $)	12 Months Ended
	Sep. 30, 2013	Sep. 30, 2012
Income Tax Disclosure [Abstract]	'	'
Net deferred tax asset (liability)	$22,554,000	$8,449,000
Liability for uncertain tax positions	100,000	3,200,000
Unrecognized tax benefits that would impact effective tax rate	100,000	'
Interest on income taxes accrued	0	2,000,000
Income tax penalties accrued	$0	$300,000
Returns open to examination, minimum (years)	'3 years	'
Returns open to examination, maximum (years)	'5 years	'
Returns open to examination, state impact of federal changes, maximum (years)	'2 years	'

Income_Taxes_Net_Deferred_Tax_

Income Taxes - Net Deferred Tax Asset (Liability) (Details) (USD $)	Sep. 30, 2013	Sep. 30, 2012
In Thousands, unless otherwise specified
Deferred tax assets	'	'
Loan loss reserves	$52,182	$48,932
REO reserves	18,018	24,003
Asset Purchase Tax Basis Difference (net)	20,008	29,165
Delinquent accrued interest	6,536	5,932
Other, net	3,810	958
Total deferred tax assets	100,554	108,990
Deferred tax liabilities	'	'
FDIC indemnification asset	8,033	21,050
Federal Home Loan Bank stock dividends	34,367	35,557
Valuation adjustment on available-for-sale securities	3,706	7,731
Loan origination costs	11,980	12,670
Depreciation	19,722	22,313
Deferred gain on forward commitments	0	0
Core deposit intangible	192	1,220
Total deferred tax liabilities	78,000	100,541
Net deferred tax asset	22,554	8,449
Current tax asset	21,446	14,064
Net tax asset	$44,000	$22,513

Income_Taxes_Reconciliation_of

Income Taxes - Reconciliation of Effective Income Tax Rate (Details)	12 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2011
Income Tax Disclosure [Abstract]	'	'	'
Statutory income tax rate	35.00%	35.00%	35.00%
State income tax	2.00%	2.00%	2.00%
Other differences	-2.00%	-1.00%	-1.00%
Effective income tax rate	35.00%	36.00%	36.00%

Income_Taxes_Components_of_Inc

Income Taxes - Components of Income Taxes (Benefit) (Details) (USD $)	3 Months Ended								12 Months Ended
In Thousands, unless otherwise specified	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2012	Sep. 30, 2012	Jun. 30, 2012	Mar. 31, 2012	Dec. 31, 2011	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2011
Federal:	'	'	'	'	'	'	'	'	'	'	'
Current	'	'	'	'	'	'	'	'	$66,756	$57,047	'
Deferred	'	'	'	'	'	'	'	'	10,355	15,589	'
Federal	'	'	'	'	'	'	'	'	77,111	72,636	'
State:	'	'	'	'	'	'	'	'	'	'	'
Current	'	'	'	'	'	'	'	'	5,213	4,091	'
Deferred	'	'	'	'	'	'	'	'	787	1,001	'
State	'	'	'	'	'	'	'	'	6,000	5,092	'
Income Tax Expense (Benefit), Continuing Operations [Abstract]	'	'	'	'	'	'	'	'	'	'	'
Current	'	'	'	'	'	'	'	'	71,969	61,138	88,373
Deferred	'	'	'	'	'	'	'	'	11,142	16,590	-25,855
Income taxes	$24,293	$21,003	$17,924	$19,891	$19,987	$19,778	$19,165	$18,798	$83,111	$77,728	$62,518

Income_Taxes_Unrecognized_Tax_

Income Taxes - Unrecognized Tax Benefits (Details) (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Sep. 30, 2013	Sep. 30, 2012
Income Tax Disclosure [Abstract]	'	'
Balance at October 1,	$4,509	$4,191
Tax positions related to current year:	'	'
Additions	0	0
Reductions	0	0
Tax positions related to prior years:	'	'
Additions	234	506
Reductions	-1,293	0
Settlements with taxing authorities	-302	0
Lapses in statues of limitations	-3,033	-188
Balance at September 30,	$115	$4,509

401k_and_Employee_Stock_Owners1

401(k) and Employee Stock Ownership Plan (Details) (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2011
Compensation and Retirement Disclosure [Abstract]	'	'	'
Annual Employee Additional Contribution Threshold, Percentage of Base Salary	100.00%	'	'
Annual Employee Additional Contribution, Maximum Allowable Contribution	$49	'	'
Term for Employees to Become Fully Vested	'6 years	'	'
Company contributions to plan	$5,870	$5,400	$5,400

Stock_Award_Plans_Details

Stock Award Plans (Details) (USD $)	12 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2011
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]	'	'	'
Award vesting period	'5 years	'	'
Contractual term of award	'10 years	'	'
Shares authorized to be reserved	5,000,000	'	'
Shares available for issuance	4,357,600	'	'
Unrecognized compensation cost for stock options, net of forfeitures	$740,000	'	'
Weighted average remaining period (years)	'2 years 1 month 6 days	'	'
Shares issued	630,735	'	'
Fair market value at date of grant at restricted stock	10,700,000	'	'
Compensation cost for stock options	473,000	848,000	1,087,000
Weighted average assumptions	'	'	'
Annual dividend yield	0.00%	2.34%	1.89%
Expected volatility	0.00%	31.00%	30.00%
Risk-free interest rate	0.00%	0.77%	2.00%
Expected life	'0 years	'4 years 6 months	'4 years 6 months
Restricted Stock [Member]	'	'	'
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]	'	'	'
Shares issued	834,935	'	'
Fair market value at date of grant at restricted stock	14,200,000	'	'
Compensation cost for stock options	$2,815,049	$1,992,000	$1,537,000
Minimum | Restricted Stock [Member]	'	'	'
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]	'	'	'
Award vesting period	'1 year	'	'
Maximum | Restricted Stock [Member]	'	'	'
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]	'	'	'
Award vesting period	'7 years	'	'

Stock_Award_Plans_Option_Activ

Stock Award Plans - Option Activity (Details) (Employee Stock Option [Member], USD $)	12 Months Ended
In Thousands, except Share data, unless otherwise specified	Sep. 30, 2013	Sep. 30, 2012
Employee Stock Option [Member]	'	'
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding [Roll Forward]	'	'
Options outstanding at beginning of period	2,300,106	'
Options granted	0	'
Options exercised	-236,691	'
Options forfeited	-159,837	'
Options outstanding at end of period	1,903,578	2,300,106
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price [Roll Forward]	'	'
Options outstanding, weighted average exercise price at beginning of period	$20.60	'
Options granted, weighted average exercise price	$0	'
Options exercised, weighted average exercise price	$18.12	'
Options forfeited, weighted average exercise price	$20.31	'
Options outstanding, weighted average exercise price at end of period	$20.93	$20.60
Share-based Compensation Arrangement by Share-based Payment Award, Options, Additional Disclosures [Abstract]	'	'
Options exercisable	1,615,828	'
Options exercisable, weighted average exercise price	$21.82	'
Options outstanding, weighted average remaining contractual term	'4 years	'4 years
Options exercisable, weighted average remaining contractual term	'3 years	'
Options outstanding, aggregate intrinsic value	$2,563	$1,269
Options exercisable, aggregate intrinsic value	$1,196	'

Stock_Award_Plans_Other_Stock_

Stock Award Plans - Other Stock Option Information (Details) (USD $)	12 Months Ended
In Thousands, except Per Share data, unless otherwise specified	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2011
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]	'	'	'
Compensation cost for stock options	$473	$848	$1,087
Weighted average grant date fair value	$3.24	$3.53	$3.89
Total intrinsic value of options exercised	781	125	259
Grant date fair value of options exercised	791	54	312
Cash received from options exercises	4,261	357	1,630
Tax benefit realized for option exercises	$1	$0	$37

Stock_Award_Plans_Nonvested_Sh

Stock Award Plans - Nonvested Share Activity (Details) (USD $)	12 Months Ended
	Sep. 30, 2013	Dec. 31, 2011
Non-Vested Options [Member]	'	'
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward]	'	'
Outstanding, beginning of period	'	614,272
Granted	0	'
Vested	-283,407	'
Forfeited	-43,115	'
Outstanding, end of period	287,750	614,272
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value [Roll Forward]	'	'
Outstanding, weighted average grant date fair value, beginning of period	$3.44	$3.20
Granted, weighted average grant date fair value	$0	'
Vested, weighted average grant date fair value	$2.95	'
Forfeited, weighted average grant date fair value	$3.25	'
Outstanding, weighted average grant date fair value, end of period	$3.44	$3.20
Non-Vested Share Awards [Member]	'	'
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward]	'	'
Outstanding, beginning of period	'	189,609
Granted	268,750	'
Vested	-225,542	'
Forfeited	-23,150	'
Outstanding, end of period	209,667	189,609
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value [Roll Forward]	'	'
Outstanding, weighted average grant date fair value, beginning of period	$15.89	'
Outstanding, weighted average grant date fair value, end of period	$15.89	'

Stockholders_Equity_Details

Stockholders' Equity (Details) (USD $)	Sep. 30, 2013	Sep. 30, 2012
In Thousands, unless otherwise specified
The Company	'	'
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]	'	'
Capital	$1,749,383	$1,707,211
Capital to Risk Weighted Assets	26.49%	28.14%
Capital Required for Capital Adequacy	528,243	485,310
Capital Required for Capital Adequacy to Risk Weighted Assets	8.00%	8.00%
Tier One Risk Based Capital	1,666,091	1,630,656
Tier One Risk Based Capital to Risk Weighted Assets	25.23%	26.88%
Tier One Risk Based Capital Required for Capital Adequacy	264,121	242,655
Tier One Risk Based Capital Required for Capital Adequacy to Risk Weighted Assets	4.00%	4.00%
Tier One Leverage Capital	1,666,091	1,630,656
Tier One Leverage Capital to Average Assets	13.03%	12.83%
Tier One Leverage Capital Required for Capital Adequacy	511,334	508,534
Tier One Leverage Capital Required for Capital Adequacy to Average Assets	4.00%	4.00%
The Bank	'	'
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]	'	'
Capital	1,693,227	1,653,760
Capital to Risk Weighted Assets	25.64%	27.29%
Capital Required for Capital Adequacy	528,380	484,822
Capital Required for Capital Adequacy to Risk Weighted Assets	8.00%	8.00%
Capital Required to be Well Capitalized	660,475	606,028
Capital Required to be Well Capitalized to Risk Weighted Assets	10.00%	10.00%
Tier One Risk Based Capital	1,609,914	1,577,280
Tier One Risk Based Capital to Risk Weighted Assets	24.38%	26.03%
Tier One Risk Based Capital Required for Capital Adequacy	264,190	242,411
Tier One Risk Based Capital Required for Capital Adequacy to Risk Weighted Assets	4.00%	4.00%
Tier One Risk Based Capital Required to be Well Capitalized	396,285	363,617
Tier One Risk Based Capital Required to be Well Capitalized to Risk Weighted Assets	6.00%	6.00%
Tier One Leverage Capital	1,609,914	1,577,280
Tier One Leverage Capital to Average Assets	12.59%	12.92%
Tier One Leverage Capital Required for Capital Adequacy	511,358	488,445
Tier One Leverage Capital Required for Capital Adequacy to Average Assets	4.00%	4.00%
Tier One Leverage Capital Required to be Well Capitalized	$639,197	$610,556
Tier One Leverage Capital Required to be Well Capitalized to Average Assets	5.00%	5.00%

Stockholders_Equity_Narrative_

Stockholders' Equity - Narrative (Details) (USD $)	12 Months Ended
	Sep. 30, 2013	Sep. 30, 2012
Equity [Abstract]	'	'
Stock repurchased	6,315,196	2,895,484
Weighted average cost of repurchased stock	$17.46	$14.48
Additional shares authorized to be repurchased	9,872,834	'
Warrants issued (in shares)	1,707,456	'
Warrant exercise price (in dollars per share)	17.57	'
Warrants outstanding	1,700,856,000	'

Fair_Values_of_Financial_Instr2

Fair Values of Financial Instruments (Details) (USD $)	Sep. 30, 2013	Sep. 30, 2012
In Thousands, unless otherwise specified
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]	'	'
Available-for-sale securities	$2,360,948	$1,781,705
Held-to-maturity securities	1,582,849	1,217,223
Carrying Amount	'	'
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]	'	'
Cash and cash equivalents	203,563	751,430
Available-for-sale securities	2,360,948	1,781,705
Held-to-maturity securities	1,654,666	1,191,487
Loans receivable	7,528,030	7,451,998
Covered loans	295,947	288,376
FDIC indemnification asset	64,615	87,571
FHLB stock	173,009	149,840
Customer accounts	9,090,271	8,576,618
FHLB advances and other borrowings	1,930,000	1,880,000
Estimated Fair Value	'	'
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]	'	'
Cash and cash equivalents	203,563	751,430
Available-for-sale securities	2,360,948	1,781,705
Held-to-maturity securities	1,582,849	1,217,223
Loans receivable	8,070,279	7,949,892
Covered loans	300,610	289,754
FDIC indemnification asset	62,300	85,846
FHLB stock	173,009	149,840
Customer accounts	8,585,068	8,406,432
FHLB advances and other borrowings	2,064,248	2,110,223
Equity securities | Carrying Amount	'	'
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]	'	'
Available-for-sale securities	101,237	'
Held-to-maturity securities	0	0
Equity securities | Estimated Fair Value	'	'
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]	'	'
Available-for-sale securities	101,237	0
Held-to-maturity securities	0	0
U.S. agency securities | Carrying Amount	'	'
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]	'	'
Available-for-sale securities	533,975	183,560
Held-to-maturity securities	0	0
U.S. agency securities | Estimated Fair Value	'	'
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]	'	'
Available-for-sale securities	533,975	183,560
Held-to-maturity securities	0	0
Obligations of states and political subdivisions | Carrying Amount	'	'
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]	'	'
Available-for-sale securities	22,545	24,844
Held-to-maturity securities	0	795
Obligations of states and political subdivisions | Estimated Fair Value	'	'
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]	'	'
Available-for-sale securities	22,545	24,844
Held-to-maturity securities	0	802
Obligations of foreign governments | Carrying Amount	'	'
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]	'	'
Available-for-sale securities	0	0
Held-to-maturity securities	0	0
Obligations of foreign governments | Estimated Fair Value	'	'
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]	'	'
Available-for-sale securities	0	0
Held-to-maturity securities	0	0
Corporate debt securities | Carrying Amount	'	'
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]	'	'
Available-for-sale securities	452,015	403,325
Held-to-maturity securities	0	0
Corporate debt securities | Estimated Fair Value	'	'
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]	'	'
Available-for-sale securities	452,015	403,325
Held-to-maturity securities	0	0
Agency pass through mortgage-backed securities | Carrying Amount	'	'
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]	'	'
Available-for-sale securities	1,251,176	1,169,976
Held-to-maturity securities	1,654,666	1,190,692
Agency pass through mortgage-backed securities | Estimated Fair Value	'	'
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]	'	'
Available-for-sale securities	1,251,176	1,169,976
Held-to-maturity securities	1,582,849	1,216,421
Other debt securites | Carrying Amount	'	'
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]	'	'
Available-for-sale securities	0	0
Held-to-maturity securities	0	0
Other debt securites | Estimated Fair Value	'	'
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]	'	'
Available-for-sale securities	0	0
Held-to-maturity securities	$0	$0

Financial_Information_Washingt2

Financial Information - Washington Federal, INC. - Statement of Financial Condition (Details) (USD $)	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2011	Sep. 30, 2010
In Thousands, except Share data, unless otherwise specified
Assets	'	'	'	'
Other assets	$125,076	$137,219	'	'
Total assets	13,082,859	12,472,944	'	'
Liabilities	'	'	'	'
Total liabilities	11,145,224	10,573,192	'	'
Stockholders’ equity	'	'	'	'
Common stock, $1.00 par value, 300,000,000 shares authorized; 132,572,475 and 129,950,223 shares issued; 102,484,671 and 106,177,615 shares outstanding	132,573	129,950	'	'
Accumulated other comprehensive income, net of tax	6,378	13,306	'	'
Treasury stock, at cost; 30,087,804 and 23,772,608 shares	-420,817	-310,579	'	'
Retained earnings	594,450	480,780	'	'
Total stockholders’ equity	1,937,635	1,899,752	1,906,533	1,841,147
Total liabilities and stockholders’ equity	13,082,859	12,472,944	'	'
Common stock, par value (in dollars per share)	$1	$1	'	'
Common stock, shares authorized (in shares)	300,000,000	300,000,000	'	'
Common stock, shares issued (in shares)	132,572,475	129,950,223	'	'
Common stock, shares outstanding (in shares)	102,484,671	106,177,615	'	'
Treasury stock, shares (in shares)	30,087,804	23,772,608	'	'
Parent Company [Member]	'	'	'	'
Assets	'	'	'	'
Cash	66,425	61,926	'	'
Investment in subsidiary	1,881,458	1,846,375	'	'
Other assets	0	1	'	'
Total assets	1,947,883	1,908,302	'	'
Liabilities	'	'	'	'
Dividend payable and other liabilities	10,248	8,550	'	'
Total liabilities	10,248	8,550	'	'
Stockholders’ equity	'	'	'	'
Common stock, $1.00 par value, 300,000,000 shares authorized; 132,572,475 and 129,950,223 shares issued; 102,484,671 and 106,177,615 shares outstanding	132,573	129,950	'	'
Paid-in capital	1,625,051	1,586,295	'	'
Accumulated other comprehensive income, net of tax	6,378	13,306	'	'
Treasury stock, at cost; 30,087,804 and 23,772,608 shares	-420,817	-310,579	'	'
Retained earnings	594,450	480,780	'	'
Total stockholders’ equity	1,937,635	1,899,752	'	'
Total liabilities and stockholders’ equity	$1,947,883	$1,908,302	'	'
Common stock, par value (in dollars per share)	$1	$1	'	'
Common stock, shares authorized (in shares)	300,000,000	300,000,000	'	'
Common stock, shares issued (in shares)	132,572,475	129,950,223	'	'
Common stock, shares outstanding (in shares)	102,484,671	106,177,615	'	'
Treasury stock, shares (in shares)	30,087,804	23,722,608	'	'

Financial_Information_Washingt3

Financial Information - Washington Federal, INC. - Statements of Operations and Statements of Cash Flows (Details) (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2011
Expense	'	'	'
Income before income taxes	$234,616	$215,911	$173,659
Income tax benefit	-83,111	-77,728	-62,518
NET INCOME	151,505	138,183	111,141
Cash Flows From Operating Activities	'	'	'
NET INCOME	151,505	138,183	111,141
Adjustments to reconcile net income to net cash provided by operating activities	'	'	'
Decrease (increase) in other assets	36,350	-74,889	21,600
Net cash provided by operating activities	181,422	174,956	261,697
Cash Flows From Financing Activities	'	'	'
Proceeds from exercise of common stock options and related tax benefit	4,261	357	1,686
Treasury stock purchased	-110,238	-41,914	-59,680
Dividends paid on common stock	-37,835	-32,430	-25,697
Net cash used by financing activities	-337,395	-1,293,868	-170,284
Increase (decrease) in cash	-547,867	-64,572	-72,620
Cash and cash equivalents at beginning of period	751,430	816,002	888,622
Cash and cash equivalents at end of period	203,563	751,430	816,002
Parent Company [Member]	'	'	'
Income	'	'	'
Dividends from subsidiary	143,799	106,234	100,600
Total Income	143,799	106,234	100,600
Expense	'	'	'
Miscellaneous	530	564	626
Total expense	530	564	626
Income before income taxes	143,269	105,670	99,974
Equity in undistributed net income of subsidiary	8,045	32,513	11,167
Income before income taxes	151,314	138,183	111,141
Income tax benefit	191	0	0
NET INCOME	151,505	138,183	111,141
Cash Flows From Operating Activities	'	'	'
NET INCOME	151,505	138,183	111,141
Adjustments to reconcile net income to net cash provided by operating activities	'	'	'
Equity in undistributed net income of subsidiaries	-4,893	-32,513	-4,382
Decrease (increase) in other assets	1	36	-37
Increase in other liabilities	1,698	2,508	1,121
Net cash provided by operating activities	148,311	108,214	107,843
Cash Flows From Financing Activities	'	'	'
Proceeds from exercise of common stock options and related tax benefit	4,261	357	1,686
Treasury stock purchased	-110,238	-41,914	-59,680
Dividends paid on common stock	-37,835	-32,430	-26,796
Net cash used by financing activities	-143,812	-73,987	-84,790
Increase (decrease) in cash	4,499	34,227	23,053
Cash and cash equivalents at beginning of period	61,926	27,699	4,646
Cash and cash equivalents at end of period	$66,425	$61,926	$27,699

Selected_Quarterly_Financial_D2

Selected Quarterly Financial Data (Unaudited) (Details) (USD $)	3 Months Ended								12 Months Ended
In Thousands, except Per Share data, unless otherwise specified	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2012	Sep. 30, 2012	Jun. 30, 2012	Mar. 31, 2012	Dec. 31, 2011	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2011
Quarterly Financial Information Disclosure [Abstract]	'	'	'	'	'	'	'	'	'	'	'
Interest income	$130,302	$128,176	$126,505	$131,309	$134,380	$145,384	$154,581	$155,926	'	'	'
Interest expense	33,343	33,461	33,482	35,875	42,209	48,849	49,979	52,212	136,159	193,249	227,696
Interest income	96,959	94,715	93,023	95,434	92,171	96,535	104,602	103,714	516,291	590,271	644,635
Provision for loan losses	-2,250	0	0	3,600	5,379	10,366	18,000	11,210	1,350	44,955	93,104
Other operating income (REO expense)	11,157	5,236	2,043	1,638	4,439	4,736	3,446	-5,923	'	'	'
Other operating expense	43,167	41,610	41,164	38,298	35,713	35,964	36,812	34,365	45,037	34,631	29,496
Total Income	67,199	58,341	53,902	55,174	55,518	54,941	53,236	52,216	234,616	215,911	173,659
Income taxes	24,293	21,003	17,924	19,891	19,987	19,778	19,165	18,798	83,111	77,728	62,518
NET INCOME	$42,906	$37,338	$35,978	$35,283	$35,531	$35,163	$34,071	$33,418	$151,505	$138,183	$111,141
Basic earnings per share (in dollars per share)	$0.42	$0.36	$0.34	$0.33	$0.33	$0.33	$0.32	$0.31	$1.45	$1.29	$1
Diluted earnings per share (in dollars per share)	$0.41	$0.36	$0.34	$0.33	$0.33	$0.33	$0.32	$0.31	$1.45	$1.29	$1
Cash dividends per share (in dollars per share)	$0.10	$0.09	$0.09	$0.08	$0.08	$0.08	$0.08	$0.08	$0.36	$0.32	$0.24
Return of average assets	1.32%	1.15%	1.10%	1.11%	1.10%	1.04%	1.00%	0.98%	'	'	'

Fair_Value_Measurements_Detail

Fair Value Measurements (Details) (USD $)	Sep. 30, 2013	Sep. 30, 2012
In Thousands, unless otherwise specified
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'
Available-for-sale securities	$2,360,948	$1,781,705
Fair Value, Measurements, Recurring | Level 1	'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'
Available-for-sale securities	101,237	'
Fair Value, Measurements, Recurring | Level 2	'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'
Available-for-sale securities	2,259,711	'
Fair Value, Measurements, Recurring | Level 3	'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'
Available-for-sale securities	0	'
Fair Value, Measurements, Recurring | Estiamte of Fair Value	'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'
Available-for-sale securities	2,360,948	'
Equity securities | Fair Value, Measurements, Recurring | Level 1	'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'
Available-for-sale securities	101,237	'
Equity securities | Fair Value, Measurements, Recurring | Level 2	'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'
Available-for-sale securities	0	'
Equity securities | Fair Value, Measurements, Recurring | Level 3	'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'
Available-for-sale securities	0	'
Equity securities | Fair Value, Measurements, Recurring | Estiamte of Fair Value	'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'
Available-for-sale securities	101,237	'
Obligations of U.S. government | Fair Value, Measurements, Recurring | Level 1	'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'
Available-for-sale securities	0	'
Obligations of U.S. government | Fair Value, Measurements, Recurring | Level 2	'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'
Available-for-sale securities	533,975	'
Obligations of U.S. government | Fair Value, Measurements, Recurring | Level 3	'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'
Available-for-sale securities	0	'
Obligations of U.S. government | Fair Value, Measurements, Recurring | Estiamte of Fair Value	'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'
Available-for-sale securities	533,975	'
Obligations of states and political subdivisions | Fair Value, Measurements, Recurring | Level 1	'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'
Available-for-sale securities	0	'
Obligations of states and political subdivisions | Fair Value, Measurements, Recurring | Level 2	'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'
Available-for-sale securities	22,545	'
Obligations of states and political subdivisions | Fair Value, Measurements, Recurring | Level 3	'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'
Available-for-sale securities	0	'
Obligations of states and political subdivisions | Fair Value, Measurements, Recurring | Estiamte of Fair Value	'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'
Available-for-sale securities	22,545	'
Obligations of foreign governments | Fair Value, Measurements, Recurring | Level 1	'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'
Available-for-sale securities	0	'
Obligations of foreign governments | Fair Value, Measurements, Recurring | Level 2	'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'
Available-for-sale securities	0	'
Obligations of foreign governments | Fair Value, Measurements, Recurring | Level 3	'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'
Available-for-sale securities	0	'
Obligations of foreign governments | Fair Value, Measurements, Recurring | Estiamte of Fair Value	'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'
Available-for-sale securities	0	'
Corporate debt securities | Fair Value, Measurements, Recurring | Level 1	'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'
Available-for-sale securities	0	'
Corporate debt securities | Fair Value, Measurements, Recurring | Level 2	'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'
Available-for-sale securities	452,015	'
Corporate debt securities | Fair Value, Measurements, Recurring | Level 3	'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'
Available-for-sale securities	0	'
Corporate debt securities | Fair Value, Measurements, Recurring | Estiamte of Fair Value	'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'
Available-for-sale securities	452,015	'
Agency pass through mortgage-backed securities | Fair Value, Measurements, Recurring | Level 1	'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'
Available-for-sale securities	0	'
Agency pass through mortgage-backed securities | Fair Value, Measurements, Recurring | Level 2	'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'
Available-for-sale securities	1,251,176	'
Agency pass through mortgage-backed securities | Fair Value, Measurements, Recurring | Level 3	'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'
Available-for-sale securities	0	'
Agency pass through mortgage-backed securities | Fair Value, Measurements, Recurring | Estiamte of Fair Value	'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'
Available-for-sale securities	1,251,176	'
Other debt securites | Fair Value, Measurements, Recurring | Level 1	'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'
Available-for-sale securities	0	'
Other debt securites | Fair Value, Measurements, Recurring | Level 2	'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'
Available-for-sale securities	0	'
Other debt securites | Fair Value, Measurements, Recurring | Level 3	'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'
Available-for-sale securities	0	'
Other debt securites | Fair Value, Measurements, Recurring | Estiamte of Fair Value	'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'
Available-for-sale securities	$0	'

Fair_Value_Measurements_Fair_V

Fair Value Measurements - Fair Value Measured on Nonrecurring Basis (Details) (Fair Value, Measurements, Nonrecurring, USD $)	3 Months Ended		12 Months Ended
In Thousands, unless otherwise specified	Sep. 30, 2012		Sep. 30, 2013
Level 1	'		'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'		'
Assets measured on nonrecurring basis	'		$0
Level 2	'		'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'		'
Assets measured on nonrecurring basis	'		0
Level 3	'		'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'		'
Assets measured on nonrecurring basis	'		190,318
Estiamte of Fair Value	'		'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'		'
Assets measured on nonrecurring basis	'		190,318
Impaired loans | Level 1	'		'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'		'
Assets measured on nonrecurring basis	'		0	[1]
Impaired loans | Level 2	'		'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'		'
Assets measured on nonrecurring basis	'		0	[1]
Impaired loans | Level 3	'		'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'		'
Assets measured on nonrecurring basis	'		87,170	[1]
Impaired loans | Estiamte of Fair Value	'		'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'		'
Assets measured on nonrecurring basis	'		87,170	[1]
Covered REO | Level 1	'		'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'		'
Assets measured on nonrecurring basis	'		0	[2]
Covered REO | Level 2	'		'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'		'
Assets measured on nonrecurring basis	'		0	[2]
Covered REO | Level 3	'		'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'		'
Assets measured on nonrecurring basis	'		20,308	[2]
Covered REO | Estiamte of Fair Value	'		'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'		'
Assets measured on nonrecurring basis	'		20,308	[2]
Real estate held for sale | Level 1	'		'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'		'
Assets measured on nonrecurring basis	'		0	[2]
Real estate held for sale | Level 2	'		'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'		'
Assets measured on nonrecurring basis	'		0	[2]
Real estate held for sale | Level 3	'		'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'		'
Assets measured on nonrecurring basis	'		82,840	[2]
Real estate held for sale | Estiamte of Fair Value	'		'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'		'
Assets measured on nonrecurring basis	'		82,840	[2]
Changes Measurement	'		'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'		'
Losses related to impaired loans and real estate held for sale	5,192		38,450
Changes Measurement | Impaired loans	'		'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'		'
Losses related to impaired loans and real estate held for sale	366	[1]	13,371	[1]
Changes Measurement | Covered REO	'		'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'		'
Losses related to impaired loans and real estate held for sale	208	[2]	811	[2]
Changes Measurement | Real estate held for sale	'		'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'		'
Losses related to impaired loans and real estate held for sale	$4,618	[2]	$24,268	[2]
[1]	The losses represents remeasurements of collateral-dependent loans.
[2]	The losses represents aggregate writedowns and charge-offs on real estate held for sale.

Covered_Assets_Details

Covered Assets (Details) (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Sep. 30, 2013	Sep. 30, 2012
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Covered assets	$326,927	$317,925
Gross covered loans	362,248	373,455
Covered loans, allowance for losses	0	0
Outstanding principal balance of acquired loans	362,248	373,455
Discount balance related to acquired loans	66,301	85,079
Covered loans, net	295,947	288,376
FDIC Indemnification Asset Movement Analysis [Roll Forward]	'	'
Balance at beginning of period	87,571	101,634
Additions	18,101	3,284
Payments received	-13,421	-3,456
Amortization	-28,722	-15,510
Accretion	1,086	1,619
Balance at end of period	64,615	87,571
Single-family residential	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Gross covered loans	56,888	43,375
Construction - speculative	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Gross covered loans	440	4,609
Construction - custom	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Gross covered loans	1,197	1,196
Land - acquisition & development	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Gross covered loans	22,763	34,177
Land - consumer lot loans	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Gross covered loans	741	995
Multi-family	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Gross covered loans	25,785	32,343
Commercial real estate	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Gross covered loans	210,604	205,376
Commercial & industrial	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Gross covered loans	24,365	31,527
HELOC	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Gross covered loans	18,619	18,280
Consumer	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Gross covered loans	846	1,577
Acquired Impaired	'	'
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Accretable Yield Movement Schedule [Roll Forward]	'	'
Accretable Yield, Balance at beginning of period	50,902	37,072
Carrying Amount, Balance at beginning of period	74,953	116,061
Accretable Yield, Additions	43,299	0
Carrying Amount, Additions	107,946	0
Accretable Yield, Reclassifications from nonaccretable balance, net	17,850	34,690
Accretable Yield, Accretion	-33,774	-20,860
Carrying Amount, Transfers to Real Estate Owned	-11,196	-15,905
Carrying Amount, Payments received, net	-67,386	-46,063
Carrying Amount, Balance at end of period	138,091	74,953
Accretable Yield, Balance at end of period	78,277	50,902
FDIC Indemnification Asset Movement Analysis [Roll Forward]	'	'
Accretion	33,774	20,860
Acquired Non-impaired	'	'
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Accretable Yield Movement Schedule [Roll Forward]	'	'
Accretable Yield, Balance at beginning of period	23,789	30,370
Carrying Amount, Balance at beginning of period	213,423	269,888
Accretable Yield, Additions	0	0
Carrying Amount, Additions	0	0
Accretable Yield, Reclassifications from nonaccretable balance, net	0	0
Accretable Yield, Accretion	-6,526	-6,581
Carrying Amount, Transfers to Real Estate Owned	0	0
Carrying Amount, Payments received, net	-62,093	-63,046
Carrying Amount, Balance at end of period	157,856	213,423
Accretable Yield, Balance at end of period	17,263	23,789
FDIC Indemnification Asset Movement Analysis [Roll Forward]	'	'
Accretion	$6,526	$6,581

Covered_Assets_Credit_Risk_Pro

Covered Assets - Credit Risk Profile by Internally Assigned Grade by Loan Status Designation (Details) (USD $)	Sep. 30, 2013	Sep. 30, 2012
In Thousands, unless otherwise specified
Covered Assets, Loan Status Designation [Line Items]	'	'
Gross covered loans	$362,248	$373,455
Discount balance related to acquired loans	-66,301	-85,079
Covered loans, allowance for losses	0	0
Covered loans, net	295,947	288,376
Credit-impaired acquired loans	'	'
Covered Assets, Loan Status Designation [Line Items]	'	'
Gross covered loans	195,612	144,612
Covered loans, allowance for losses	0	0
Acquired non-impaired loans	'	'
Covered Assets, Loan Status Designation [Line Items]	'	'
Gross covered loans	166,636	228,843
Covered loans, allowance for losses	0	0
Single-family residential	'	'
Covered Assets, Loan Status Designation [Line Items]	'	'
Gross covered loans	56,888	43,375
Single-family residential | Credit-impaired acquired loans	'	'
Covered Assets, Loan Status Designation [Line Items]	'	'
Gross covered loans	28,428	7,699
Single-family residential | Acquired non-impaired loans	'	'
Covered Assets, Loan Status Designation [Line Items]	'	'
Gross covered loans	28,460	35,676
Construction - speculative	'	'
Covered Assets, Loan Status Designation [Line Items]	'	'
Gross covered loans	440	4,609
Construction - speculative | Credit-impaired acquired loans	'	'
Covered Assets, Loan Status Designation [Line Items]	'	'
Gross covered loans	440	4,519
Construction - speculative | Acquired non-impaired loans	'	'
Covered Assets, Loan Status Designation [Line Items]	'	'
Gross covered loans	0	90
Construction - custom	'	'
Covered Assets, Loan Status Designation [Line Items]	'	'
Gross covered loans	1,197	1,196
Construction - custom | Credit-impaired acquired loans	'	'
Covered Assets, Loan Status Designation [Line Items]	'	'
Gross covered loans	1,197	1,196
Construction - custom | Acquired non-impaired loans	'	'
Covered Assets, Loan Status Designation [Line Items]	'	'
Gross covered loans	0	0
Land - acquisition & development	'	'
Covered Assets, Loan Status Designation [Line Items]	'	'
Gross covered loans	22,763	34,177
Land - acquisition & development | Credit-impaired acquired loans	'	'
Covered Assets, Loan Status Designation [Line Items]	'	'
Gross covered loans	17,953	22,747
Land - acquisition & development | Acquired non-impaired loans	'	'
Covered Assets, Loan Status Designation [Line Items]	'	'
Gross covered loans	4,810	11,430
Land - consumer lot loans	'	'
Covered Assets, Loan Status Designation [Line Items]	'	'
Gross covered loans	741	995
Land - consumer lot loans | Credit-impaired acquired loans	'	'
Covered Assets, Loan Status Designation [Line Items]	'	'
Gross covered loans	496	497
Land - consumer lot loans | Acquired non-impaired loans	'	'
Covered Assets, Loan Status Designation [Line Items]	'	'
Gross covered loans	245	498
Multi-family	'	'
Covered Assets, Loan Status Designation [Line Items]	'	'
Gross covered loans	25,785	32,343
Multi-family | Credit-impaired acquired loans	'	'
Covered Assets, Loan Status Designation [Line Items]	'	'
Gross covered loans	6,933	4,698
Multi-family | Acquired non-impaired loans	'	'
Covered Assets, Loan Status Designation [Line Items]	'	'
Gross covered loans	18,852	27,645
Commercial real estate	'	'
Covered Assets, Loan Status Designation [Line Items]	'	'
Gross covered loans	210,604	205,376
Commercial real estate | Credit-impaired acquired loans	'	'
Covered Assets, Loan Status Designation [Line Items]	'	'
Gross covered loans	121,105	83,784
Commercial real estate | Acquired non-impaired loans	'	'
Covered Assets, Loan Status Designation [Line Items]	'	'
Gross covered loans	89,499	121,592
Commercial & industrial	'	'
Covered Assets, Loan Status Designation [Line Items]	'	'
Gross covered loans	24,365	31,527
Commercial & industrial | Credit-impaired acquired loans	'	'
Covered Assets, Loan Status Designation [Line Items]	'	'
Gross covered loans	14,949	18,504
Commercial & industrial | Acquired non-impaired loans	'	'
Covered Assets, Loan Status Designation [Line Items]	'	'
Gross covered loans	9,416	13,023
HELOC	'	'
Covered Assets, Loan Status Designation [Line Items]	'	'
Gross covered loans	18,619	18,280
HELOC | Credit-impaired acquired loans	'	'
Covered Assets, Loan Status Designation [Line Items]	'	'
Gross covered loans	3,869	309
HELOC | Acquired non-impaired loans	'	'
Covered Assets, Loan Status Designation [Line Items]	'	'
Gross covered loans	14,750	17,971
Consumer	'	'
Covered Assets, Loan Status Designation [Line Items]	'	'
Gross covered loans	846	1,577
Consumer | Credit-impaired acquired loans	'	'
Covered Assets, Loan Status Designation [Line Items]	'	'
Gross covered loans	242	659
Consumer | Acquired non-impaired loans	'	'
Covered Assets, Loan Status Designation [Line Items]	'	'
Gross covered loans	604	918
Pool 1 - Construction and land A&D | Credit-impaired acquired loans	'	'
Covered Assets, Loan Status Designation [Line Items]	'	'
Gross covered loans	44,020	'
Pool 2 - Single-family residential | Credit-impaired acquired loans	'	'
Covered Assets, Loan Status Designation [Line Items]	'	'
Gross covered loans	21,541	'
Pool 3 - Multi-family | Credit-impaired acquired loans	'	'
Covered Assets, Loan Status Designation [Line Items]	'	'
Gross covered loans	5,231	'
Pool 4 - HELOC & other consumer | Credit-impaired acquired loans	'	'
Covered Assets, Loan Status Designation [Line Items]	'	'
Gross covered loans	5,991	'
Pool 5 - Commercial real estate | Credit-impaired acquired loans	'	'
Covered Assets, Loan Status Designation [Line Items]	'	'
Gross covered loans	105,553	'
Pool 6 - Commercial & industrial | Credit-impaired acquired loans	'	'
Covered Assets, Loan Status Designation [Line Items]	'	'
Gross covered loans	13,276	'
Pass [Member]	'	'
Covered Assets, Loan Status Designation [Line Items]	'	'
Grade as percentage of total gross assets	95.60%	94.90%
Pass [Member] | Credit-impaired acquired loans	'	'
Covered Assets, Loan Status Designation [Line Items]	'	'
Gross covered loans	84,903	'
Pass [Member] | Acquired non-impaired loans	'	'
Covered Assets, Loan Status Designation [Line Items]	'	'
Gross covered loans	123,606	'
Grade as percentage of total gross assets	74.20%	'
Pass [Member] | Single-family residential | Acquired non-impaired loans	'	'
Covered Assets, Loan Status Designation [Line Items]	'	'
Gross covered loans	26,426	'
Pass [Member] | Construction - speculative | Acquired non-impaired loans	'	'
Covered Assets, Loan Status Designation [Line Items]	'	'
Gross covered loans	0	'
Pass [Member] | Construction - custom | Acquired non-impaired loans	'	'
Covered Assets, Loan Status Designation [Line Items]	'	'
Gross covered loans	0	'
Pass [Member] | Land - acquisition & development | Acquired non-impaired loans	'	'
Covered Assets, Loan Status Designation [Line Items]	'	'
Gross covered loans	3,069	'
Pass [Member] | Land - consumer lot loans | Acquired non-impaired loans	'	'
Covered Assets, Loan Status Designation [Line Items]	'	'
Gross covered loans	245	'
Pass [Member] | Multi-family | Acquired non-impaired loans	'	'
Covered Assets, Loan Status Designation [Line Items]	'	'
Gross covered loans	17,217	'
Pass [Member] | Commercial real estate | Acquired non-impaired loans	'	'
Covered Assets, Loan Status Designation [Line Items]	'	'
Gross covered loans	56,120	'
Pass [Member] | Commercial & industrial | Acquired non-impaired loans	'	'
Covered Assets, Loan Status Designation [Line Items]	'	'
Gross covered loans	5,175	'
Pass [Member] | HELOC | Acquired non-impaired loans	'	'
Covered Assets, Loan Status Designation [Line Items]	'	'
Gross covered loans	14,750	'
Pass [Member] | Consumer | Acquired non-impaired loans	'	'
Covered Assets, Loan Status Designation [Line Items]	'	'
Gross covered loans	604	'
Pass [Member] | Pool 1 - Construction and land A&D | Credit-impaired acquired loans	'	'
Covered Assets, Loan Status Designation [Line Items]	'	'
Gross covered loans	14,361	'
Pass [Member] | Pool 2 - Single-family residential | Credit-impaired acquired loans	'	'
Covered Assets, Loan Status Designation [Line Items]	'	'
Gross covered loans	21,541	'
Pass [Member] | Pool 3 - Multi-family | Credit-impaired acquired loans	'	'
Covered Assets, Loan Status Designation [Line Items]	'	'
Gross covered loans	4,131	'
Pass [Member] | Pool 4 - HELOC & other consumer | Credit-impaired acquired loans	'	'
Covered Assets, Loan Status Designation [Line Items]	'	'
Gross covered loans	4,111	'
Pass [Member] | Pool 5 - Commercial real estate | Credit-impaired acquired loans	'	'
Covered Assets, Loan Status Designation [Line Items]	'	'
Gross covered loans	36,494	'
Pass [Member] | Pool 6 - Commercial & industrial | Credit-impaired acquired loans	'	'
Covered Assets, Loan Status Designation [Line Items]	'	'
Gross covered loans	4,265	'
Special Mention [Member]	'	'
Covered Assets, Loan Status Designation [Line Items]	'	'
Grade as percentage of total gross assets	0.50%	0.60%
Special Mention [Member] | Credit-impaired acquired loans	'	'
Covered Assets, Loan Status Designation [Line Items]	'	'
Gross covered loans	19,613	'
Special Mention [Member] | Acquired non-impaired loans	'	'
Covered Assets, Loan Status Designation [Line Items]	'	'
Gross covered loans	10,754	'
Grade as percentage of total gross assets	6.40%	'
Special Mention [Member] | Single-family residential | Acquired non-impaired loans	'	'
Covered Assets, Loan Status Designation [Line Items]	'	'
Gross covered loans	0	'
Special Mention [Member] | Construction - speculative | Acquired non-impaired loans	'	'
Covered Assets, Loan Status Designation [Line Items]	'	'
Gross covered loans	0	'
Special Mention [Member] | Construction - custom | Acquired non-impaired loans	'	'
Covered Assets, Loan Status Designation [Line Items]	'	'
Gross covered loans	0	'
Special Mention [Member] | Land - acquisition & development | Acquired non-impaired loans	'	'
Covered Assets, Loan Status Designation [Line Items]	'	'
Gross covered loans	1,019	'
Special Mention [Member] | Land - consumer lot loans | Acquired non-impaired loans	'	'
Covered Assets, Loan Status Designation [Line Items]	'	'
Gross covered loans	0	'
Special Mention [Member] | Multi-family | Acquired non-impaired loans	'	'
Covered Assets, Loan Status Designation [Line Items]	'	'
Gross covered loans	0	'
Special Mention [Member] | Commercial real estate | Acquired non-impaired loans	'	'
Covered Assets, Loan Status Designation [Line Items]	'	'
Gross covered loans	9,235	'
Special Mention [Member] | Commercial & industrial | Acquired non-impaired loans	'	'
Covered Assets, Loan Status Designation [Line Items]	'	'
Gross covered loans	500	'
Special Mention [Member] | HELOC | Acquired non-impaired loans	'	'
Covered Assets, Loan Status Designation [Line Items]	'	'
Gross covered loans	0	'
Special Mention [Member] | Consumer | Acquired non-impaired loans	'	'
Covered Assets, Loan Status Designation [Line Items]	'	'
Gross covered loans	0	'
Special Mention [Member] | Pool 1 - Construction and land A&D | Credit-impaired acquired loans	'	'
Covered Assets, Loan Status Designation [Line Items]	'	'
Gross covered loans	4,296	'
Special Mention [Member] | Pool 2 - Single-family residential | Credit-impaired acquired loans	'	'
Covered Assets, Loan Status Designation [Line Items]	'	'
Gross covered loans	0	'
Special Mention [Member] | Pool 3 - Multi-family | Credit-impaired acquired loans	'	'
Covered Assets, Loan Status Designation [Line Items]	'	'
Gross covered loans	0	'
Special Mention [Member] | Pool 4 - HELOC & other consumer | Credit-impaired acquired loans	'	'
Covered Assets, Loan Status Designation [Line Items]	'	'
Gross covered loans	0	'
Special Mention [Member] | Pool 5 - Commercial real estate | Credit-impaired acquired loans	'	'
Covered Assets, Loan Status Designation [Line Items]	'	'
Gross covered loans	15,113	'
Special Mention [Member] | Pool 6 - Commercial & industrial | Credit-impaired acquired loans	'	'
Covered Assets, Loan Status Designation [Line Items]	'	'
Gross covered loans	204	'
Substandard [Member]	'	'
Covered Assets, Loan Status Designation [Line Items]	'	'
Grade as percentage of total gross assets	3.90%	4.50%
Substandard [Member] | Credit-impaired acquired loans	'	'
Covered Assets, Loan Status Designation [Line Items]	'	'
Gross covered loans	91,096	'
Substandard [Member] | Acquired non-impaired loans	'	'
Covered Assets, Loan Status Designation [Line Items]	'	'
Gross covered loans	32,276	'
Grade as percentage of total gross assets	19.40%	'
Substandard [Member] | Single-family residential | Acquired non-impaired loans	'	'
Covered Assets, Loan Status Designation [Line Items]	'	'
Gross covered loans	2,034	'
Substandard [Member] | Construction - speculative | Acquired non-impaired loans	'	'
Covered Assets, Loan Status Designation [Line Items]	'	'
Gross covered loans	0	'
Substandard [Member] | Construction - custom | Acquired non-impaired loans	'	'
Covered Assets, Loan Status Designation [Line Items]	'	'
Gross covered loans	0	'
Substandard [Member] | Land - acquisition & development | Acquired non-impaired loans	'	'
Covered Assets, Loan Status Designation [Line Items]	'	'
Gross covered loans	722	'
Substandard [Member] | Land - consumer lot loans | Acquired non-impaired loans	'	'
Covered Assets, Loan Status Designation [Line Items]	'	'
Gross covered loans	0	'
Substandard [Member] | Multi-family | Acquired non-impaired loans	'	'
Covered Assets, Loan Status Designation [Line Items]	'	'
Gross covered loans	1,635	'
Substandard [Member] | Commercial real estate | Acquired non-impaired loans	'	'
Covered Assets, Loan Status Designation [Line Items]	'	'
Gross covered loans	24,144	'
Substandard [Member] | Commercial & industrial | Acquired non-impaired loans	'	'
Covered Assets, Loan Status Designation [Line Items]	'	'
Gross covered loans	3,741	'
Substandard [Member] | HELOC | Acquired non-impaired loans	'	'
Covered Assets, Loan Status Designation [Line Items]	'	'
Gross covered loans	0	'
Substandard [Member] | Consumer | Acquired non-impaired loans	'	'
Covered Assets, Loan Status Designation [Line Items]	'	'
Gross covered loans	0	'
Substandard [Member] | Pool 1 - Construction and land A&D | Credit-impaired acquired loans	'	'
Covered Assets, Loan Status Designation [Line Items]	'	'
Gross covered loans	25,363	'
Substandard [Member] | Pool 2 - Single-family residential | Credit-impaired acquired loans	'	'
Covered Assets, Loan Status Designation [Line Items]	'	'
Gross covered loans	0	'
Substandard [Member] | Pool 3 - Multi-family | Credit-impaired acquired loans	'	'
Covered Assets, Loan Status Designation [Line Items]	'	'
Gross covered loans	1,100	'
Substandard [Member] | Pool 4 - HELOC & other consumer | Credit-impaired acquired loans	'	'
Covered Assets, Loan Status Designation [Line Items]	'	'
Gross covered loans	1,880	'
Substandard [Member] | Pool 5 - Commercial real estate | Credit-impaired acquired loans	'	'
Covered Assets, Loan Status Designation [Line Items]	'	'
Gross covered loans	53,946	'
Substandard [Member] | Pool 6 - Commercial & industrial | Credit-impaired acquired loans	'	'
Covered Assets, Loan Status Designation [Line Items]	'	'
Gross covered loans	8,807	'
Doubtful [Member]	'	'
Covered Assets, Loan Status Designation [Line Items]	'	'
Grade as percentage of total gross assets	0.00%	0.00%
Doubtful [Member] | Credit-impaired acquired loans	'	'
Covered Assets, Loan Status Designation [Line Items]	'	'
Gross covered loans	0	'
Doubtful [Member] | Acquired non-impaired loans	'	'
Covered Assets, Loan Status Designation [Line Items]	'	'
Gross covered loans	0	'
Grade as percentage of total gross assets	0.00%	'
Doubtful [Member] | Single-family residential | Acquired non-impaired loans	'	'
Covered Assets, Loan Status Designation [Line Items]	'	'
Gross covered loans	0	'
Doubtful [Member] | Construction - speculative | Acquired non-impaired loans	'	'
Covered Assets, Loan Status Designation [Line Items]	'	'
Gross covered loans	0	'
Doubtful [Member] | Construction - custom | Acquired non-impaired loans	'	'
Covered Assets, Loan Status Designation [Line Items]	'	'
Gross covered loans	0	'
Doubtful [Member] | Land - acquisition & development | Acquired non-impaired loans	'	'
Covered Assets, Loan Status Designation [Line Items]	'	'
Gross covered loans	0	'
Doubtful [Member] | Land - consumer lot loans | Acquired non-impaired loans	'	'
Covered Assets, Loan Status Designation [Line Items]	'	'
Gross covered loans	0	'
Doubtful [Member] | Multi-family | Acquired non-impaired loans	'	'
Covered Assets, Loan Status Designation [Line Items]	'	'
Gross covered loans	0	'
Doubtful [Member] | Commercial real estate | Acquired non-impaired loans	'	'
Covered Assets, Loan Status Designation [Line Items]	'	'
Gross covered loans	0	'
Doubtful [Member] | Commercial & industrial | Acquired non-impaired loans	'	'
Covered Assets, Loan Status Designation [Line Items]	'	'
Gross covered loans	0	'
Doubtful [Member] | HELOC | Acquired non-impaired loans	'	'
Covered Assets, Loan Status Designation [Line Items]	'	'
Gross covered loans	0	'
Doubtful [Member] | Consumer | Acquired non-impaired loans	'	'
Covered Assets, Loan Status Designation [Line Items]	'	'
Gross covered loans	0	'
Doubtful [Member] | Pool 1 - Construction and land A&D | Credit-impaired acquired loans	'	'
Covered Assets, Loan Status Designation [Line Items]	'	'
Gross covered loans	0	'
Doubtful [Member] | Pool 2 - Single-family residential | Credit-impaired acquired loans	'	'
Covered Assets, Loan Status Designation [Line Items]	'	'
Gross covered loans	0	'
Doubtful [Member] | Pool 3 - Multi-family | Credit-impaired acquired loans	'	'
Covered Assets, Loan Status Designation [Line Items]	'	'
Gross covered loans	0	'
Doubtful [Member] | Pool 4 - HELOC & other consumer | Credit-impaired acquired loans	'	'
Covered Assets, Loan Status Designation [Line Items]	'	'
Gross covered loans	0	'
Doubtful [Member] | Pool 5 - Commercial real estate | Credit-impaired acquired loans	'	'
Covered Assets, Loan Status Designation [Line Items]	'	'
Gross covered loans	0	'
Doubtful [Member] | Pool 6 - Commercial & industrial | Credit-impaired acquired loans	'	'
Covered Assets, Loan Status Designation [Line Items]	'	'
Gross covered loans	0	'
Loss [Member]	'	'
Covered Assets, Loan Status Designation [Line Items]	'	'
Grade as percentage of total gross assets	0.00%	0.00%
Loss [Member] | Credit-impaired acquired loans	'	'
Covered Assets, Loan Status Designation [Line Items]	'	'
Gross covered loans	0	'
Loss [Member] | Acquired non-impaired loans	'	'
Covered Assets, Loan Status Designation [Line Items]	'	'
Gross covered loans	0	'
Grade as percentage of total gross assets	0.00%	'
Loss [Member] | Single-family residential | Acquired non-impaired loans	'	'
Covered Assets, Loan Status Designation [Line Items]	'	'
Gross covered loans	0	'
Loss [Member] | Construction - speculative | Acquired non-impaired loans	'	'
Covered Assets, Loan Status Designation [Line Items]	'	'
Gross covered loans	0	'
Loss [Member] | Construction - custom | Acquired non-impaired loans	'	'
Covered Assets, Loan Status Designation [Line Items]	'	'
Gross covered loans	0	'
Loss [Member] | Land - acquisition & development | Acquired non-impaired loans	'	'
Covered Assets, Loan Status Designation [Line Items]	'	'
Gross covered loans	0	'
Loss [Member] | Land - consumer lot loans | Acquired non-impaired loans	'	'
Covered Assets, Loan Status Designation [Line Items]	'	'
Gross covered loans	0	'
Loss [Member] | Multi-family | Acquired non-impaired loans	'	'
Covered Assets, Loan Status Designation [Line Items]	'	'
Gross covered loans	0	'
Loss [Member] | Commercial real estate | Acquired non-impaired loans	'	'
Covered Assets, Loan Status Designation [Line Items]	'	'
Gross covered loans	0	'
Loss [Member] | Commercial & industrial | Acquired non-impaired loans	'	'
Covered Assets, Loan Status Designation [Line Items]	'	'
Gross covered loans	0	'
Loss [Member] | HELOC | Acquired non-impaired loans	'	'
Covered Assets, Loan Status Designation [Line Items]	'	'
Gross covered loans	0	'
Loss [Member] | Consumer | Acquired non-impaired loans	'	'
Covered Assets, Loan Status Designation [Line Items]	'	'
Gross covered loans	0	'
Loss [Member] | Pool 1 - Construction and land A&D | Credit-impaired acquired loans	'	'
Covered Assets, Loan Status Designation [Line Items]	'	'
Gross covered loans	0	'
Loss [Member] | Pool 2 - Single-family residential | Credit-impaired acquired loans	'	'
Covered Assets, Loan Status Designation [Line Items]	'	'
Gross covered loans	0	'
Loss [Member] | Pool 3 - Multi-family | Credit-impaired acquired loans	'	'
Covered Assets, Loan Status Designation [Line Items]	'	'
Gross covered loans	0	'
Loss [Member] | Pool 4 - HELOC & other consumer | Credit-impaired acquired loans	'	'
Covered Assets, Loan Status Designation [Line Items]	'	'
Gross covered loans	0	'
Loss [Member] | Pool 5 - Commercial real estate | Credit-impaired acquired loans	'	'
Covered Assets, Loan Status Designation [Line Items]	'	'
Gross covered loans	0	'
Loss [Member] | Pool 6 - Commercial & industrial | Credit-impaired acquired loans	'	'
Covered Assets, Loan Status Designation [Line Items]	'	'
Gross covered loans	$0	'

Covered_Assets_Aging_Analysis_

Covered Assets - Aging Analysis of Non-Credit Impaired Loans (Details) (USD $)	Sep. 30, 2013	Sep. 30, 2012
In Thousands, unless otherwise specified
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Outstanding principal balance of acquired loans	$362,248	$373,455
Credit-impaired acquired loans	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Outstanding principal balance of acquired loans	195,612	144,612
Acquired non-impaired loans	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Outstanding principal balance of acquired loans	166,636	228,843
Loans and Leases Receivable, Covered Loans, Current	159,195	'
Loans and Leases Receivable, Covered Loans, 30 Days	2,963	'
Loans and Leases Receivable, Covered Loans, 60 Days	529	'
Loans and Leases Receivable, Covered Assets, 90 Days	3,949	'
Loans and Leases Receivable, Covered Assets, Past Due	7,441	'
Loans and Leases Receivable, Covered Loans, Ratio of Total Past Due Loans to Total Loans Receivable, Net of Charge Offs and Loans in Process	4.47%	'
Acquired non-impaired loans | Single-family residential	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Outstanding principal balance of acquired loans	28,460	'
Loans and Leases Receivable, Covered Loans, Current	27,411	'
Loans and Leases Receivable, Covered Loans, 30 Days	78	'
Loans and Leases Receivable, Covered Loans, 60 Days	0	'
Loans and Leases Receivable, Covered Assets, 90 Days	971	'
Loans and Leases Receivable, Covered Assets, Past Due	1,049	'
Loans and Leases Receivable, Covered Loans, Ratio of Total Past Due Loans to Total Loans Receivable, Net of Charge Offs and Loans in Process	3.69%	'
Acquired non-impaired loans | Construction - speculative	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Outstanding principal balance of acquired loans	0	'
Loans and Leases Receivable, Covered Loans, Current	0	'
Loans and Leases Receivable, Covered Loans, 30 Days	0	'
Loans and Leases Receivable, Covered Loans, 60 Days	0	'
Loans and Leases Receivable, Covered Assets, 90 Days	0	'
Loans and Leases Receivable, Covered Assets, Past Due	0	'
Acquired non-impaired loans | Construction - custom	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Outstanding principal balance of acquired loans	0	'
Loans and Leases Receivable, Covered Loans, Current	0	'
Loans and Leases Receivable, Covered Loans, 30 Days	0	'
Loans and Leases Receivable, Covered Loans, 60 Days	0	'
Loans and Leases Receivable, Covered Assets, 90 Days	0	'
Loans and Leases Receivable, Covered Assets, Past Due	0	'
Acquired non-impaired loans | Land - acquisition & development	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Outstanding principal balance of acquired loans	4,810	'
Loans and Leases Receivable, Covered Loans, Current	4,774	'
Loans and Leases Receivable, Covered Loans, 30 Days	0	'
Loans and Leases Receivable, Covered Loans, 60 Days	0	'
Loans and Leases Receivable, Covered Assets, 90 Days	36	'
Loans and Leases Receivable, Covered Assets, Past Due	36	'
Loans and Leases Receivable, Covered Loans, Ratio of Total Past Due Loans to Total Loans Receivable, Net of Charge Offs and Loans in Process	0.75%	'
Acquired non-impaired loans | Land - consumer lot loans	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Outstanding principal balance of acquired loans	245	'
Loans and Leases Receivable, Covered Loans, Current	199	'
Loans and Leases Receivable, Covered Loans, 30 Days	0	'
Loans and Leases Receivable, Covered Loans, 60 Days	0	'
Loans and Leases Receivable, Covered Assets, 90 Days	46	'
Loans and Leases Receivable, Covered Assets, Past Due	46	'
Loans and Leases Receivable, Covered Loans, Ratio of Total Past Due Loans to Total Loans Receivable, Net of Charge Offs and Loans in Process	18.78%	'
Acquired non-impaired loans | Multi-family	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Outstanding principal balance of acquired loans	18,852	'
Loans and Leases Receivable, Covered Loans, Current	17,511	'
Loans and Leases Receivable, Covered Loans, 30 Days	0	'
Loans and Leases Receivable, Covered Loans, 60 Days	0	'
Loans and Leases Receivable, Covered Assets, 90 Days	1,341	'
Loans and Leases Receivable, Covered Assets, Past Due	1,341	'
Loans and Leases Receivable, Covered Loans, Ratio of Total Past Due Loans to Total Loans Receivable, Net of Charge Offs and Loans in Process	7.11%	'
Acquired non-impaired loans | Commercial real estate	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Outstanding principal balance of acquired loans	89,499	'
Loans and Leases Receivable, Covered Loans, Current	84,949	'
Loans and Leases Receivable, Covered Loans, 30 Days	2,779	'
Loans and Leases Receivable, Covered Loans, 60 Days	455	'
Loans and Leases Receivable, Covered Assets, 90 Days	1,316	'
Loans and Leases Receivable, Covered Assets, Past Due	4,550	'
Loans and Leases Receivable, Covered Loans, Ratio of Total Past Due Loans to Total Loans Receivable, Net of Charge Offs and Loans in Process	5.08%	'
Acquired non-impaired loans | Commercial & industrial	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Outstanding principal balance of acquired loans	9,416	'
Loans and Leases Receivable, Covered Loans, Current	9,416	'
Loans and Leases Receivable, Covered Loans, 30 Days	0	'
Loans and Leases Receivable, Covered Loans, 60 Days	0	'
Loans and Leases Receivable, Covered Assets, 90 Days	0	'
Loans and Leases Receivable, Covered Assets, Past Due	0	'
Loans and Leases Receivable, Covered Loans, Ratio of Total Past Due Loans to Total Loans Receivable, Net of Charge Offs and Loans in Process	0.00%	'
Acquired non-impaired loans | HELOC	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Outstanding principal balance of acquired loans	14,750	'
Loans and Leases Receivable, Covered Loans, Current	14,334	'
Loans and Leases Receivable, Covered Loans, 30 Days	103	'
Loans and Leases Receivable, Covered Loans, 60 Days	74	'
Loans and Leases Receivable, Covered Assets, 90 Days	239	'
Loans and Leases Receivable, Covered Assets, Past Due	416	'
Loans and Leases Receivable, Covered Loans, Ratio of Total Past Due Loans to Total Loans Receivable, Net of Charge Offs and Loans in Process	2.82%	'
Acquired non-impaired loans | Consumer	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Outstanding principal balance of acquired loans	604	'
Loans and Leases Receivable, Covered Loans, Current	601	'
Loans and Leases Receivable, Covered Loans, 30 Days	3	'
Loans and Leases Receivable, Covered Loans, 60 Days	0	'
Loans and Leases Receivable, Covered Assets, 90 Days	0	'
Loans and Leases Receivable, Covered Assets, Past Due	$3	'
Loans and Leases Receivable, Covered Loans, Ratio of Total Past Due Loans to Total Loans Receivable, Net of Charge Offs and Loans in Process	0.50%	'

Subsequent_Event_Details

Subsequent Event (Details) (USD $)	Sep. 30, 2013	Sep. 30, 2012	Jul. 18, 2013	Nov. 26, 2013
	office		Bank of America, National Association	Subsequent Event
			branch	office
				WesternStates
Subsequent Event [Line Items]	'	'	'	'
Deposits	'	'	$1,500,000,000	'
Loans	'	'	11,000,000	'
Premium on deposits	'	'	2.60%	'
Number of branches acquired (in branches)	'	'	51	'
Number of offices (in offices)	182	'	'	232
Number of states in which entity operates	'	'	'	8
Assets	13,082,859,000	12,472,944,000	'	15,000,000,000
Deposits	'	'	'	$11,000,000,000