Washington Federal (WAFD) 10-K 20 Nov 19 2019 FY Annual report Financial data

Document and Entity Information

Document and Entity Information - USD ($)	12 Months Ended
	Sep. 30, 2019	Nov. 15, 2019	Mar. 29, 2019
Cover page.
Document Type	10-K
Document Annual Report	true
Document Period End Date	Sep. 30, 2019
Document Transition Report	false
Entity File Number	001-34654
Entity Registrant Name	WASHINGTON FEDERAL INC
Entity Incorporation, State or Country Code	WA
Entity Tax Identification Number	91-1661606
Entity Address, Address Line One	425 Pike Street
Entity Address, City or Town	Seattle
Entity Address, State or Province	WA
Entity Address, Postal Zip Code	98101
City Area Code	206
Local Phone Number	624-7930
Title of 12(b) Security	Common Stock, $1.00 par value per share
Trading Symbol	WAFD
Security Exchange Name	NASDAQ
Entity Well-known Seasoned Issuer	Yes
Entity Voluntary Filers	No
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Filer Category	Large Accelerated Filer
Entity Small Business	false
Entity Emerging Growth Company	false
Entity Shell Company	false
Entity Public Float			$ 2,300,567,209
Entity Common Stock, Shares Outstanding		78,448,561
Amendment Flag	false
Document Fiscal Year Focus	2019
Document Fiscal Period Focus	FY
Entity Central Index Key	0000936528
Current Fiscal Year End Date	--09-30

Consolidated Statements of Fina

Consolidated Statements of Financial Condition - USD ($) $ in Thousands	Sep. 30, 2019	Sep. 30, 2018
ASSETS
Cash and cash equivalents	$ 419,158	$ 268,650
Available-for-sale securities, at fair value	1,485,742	1,314,957
Held-to-maturity securities, at amortized cost	1,443,480	1,625,420
Loans receivable, net of allowance for loan losses of $131,534 and $129,257	11,930,575	11,477,081
Interest receivable	48,857	47,295
Premises and equipment, net	274,015	267,995
Real estate owned	6,781	11,298
FHLB & FRB stock	123,990	127,190
Bank owned life insurance	222,076	216,254
Intangible assets, including goodwill of $301,368 and $301,368	309,247	311,286
Federal and state income tax assets, net	0	1,804
Other assets	210,989	196,494
Total assets	16,474,910	15,865,724
Customer accounts
Transaction deposit accounts	7,083,801	6,582,343
Time deposit accounts	4,906,963	4,804,803
Customer accounts	11,990,764	11,387,146
FHLB advances	2,250,000	2,330,000
Advance payments by borrowers for taxes and insurance	57,830	57,417
Federal and state income tax liabilities, net	5,104	0
Accrued expenses and other liabilities	138,217	94,253
Total liabilities	14,441,915	13,868,816
Shareholders’ equity
Common stock, $1.00 par value, 300,000,000 shares authorized; 135,539,806 and 135,343,417 shares issued; 78,841,463 and 82,710,911 shares outstanding	135,540	135,343
Paid-in capital	1,672,417	1,666,609
Accumulated other comprehensive income (loss), net of taxes	15,292	8,294
Treasury stock, at cost; 56,698,343 and 52,632,506 shares	(1,126,163)	(1,002,309)
Retained earnings	1,335,909	1,188,971
Total stockholders’ equity	2,032,995	1,996,908
Total liabilities and shareholders’ equity	$ 16,474,910	$ 15,865,724

Consolidated Statements of Fi_2

Consolidated Statements of Financial Condition (Parenthetical) - USD ($) $ in Thousands	Sep. 30, 2019	Sep. 30, 2018
Statement of Financial Position [Abstract]
Allowance for loan losses	$ 131,534	$ 129,257
Goodwill	$ 301,368	$ 301,368
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)	135,539,806	135,343,417
Common stock, shares outstanding (in shares)	78,841,463	82,710,911
Treasury stock, shares (in shares)	56,698,343	52,632,506

Consolidated Statements of Oper

Consolidated Statements of Operations - USD ($) $ in Thousands	12 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2017
INTEREST INCOME
Loans receivable	$ 568,096	$ 515,807	$ 470,523
Mortgage-backed securities	74,485	70,407	60,612
Investment securities and cash equivalents	28,885	20,869	17,783
Total Income	671,466	607,083	548,918
INTEREST EXPENSE
Customer accounts	122,216	72,492	52,023
FHLB advances	68,190	62,452	64,969
Total interest expense	190,406	134,944	116,992
Net interest income	481,060	472,139	431,926
Provision (release) for loan losses	(1,650)	(5,450)	(2,100)
Net interest income after provision (release)	482,710	477,589	434,026
OTHER INCOME
Gain (loss) on sale of investment securities	(9)	0	3,499
FDIC loss share termination valuation adjustments	0	(8,550)	0
Loan fee income	3,941	3,804	4,290
Deposit fee income	24,882	25,904	22,643
Other income	33,504	22,920	21,783
Total other income	62,318	44,078	52,215
OTHER EXPENSE
Compensation and benefits	133,588	123,554	112,257
Occupancy	38,579	36,453	35,260
FDIC insurance premiums	9,808	11,592	11,410
Product delivery	15,934	16,372	13,972
Information technology	38,955	34,643	28,859
Other expense	46,199	41,708	29,761
Total other expense	283,063	264,322	231,519
Gain (loss) on real estate owned, net	810	(102)	1,494
Income before income taxes	262,775	257,243	256,216
Income tax expense (benefit)
Current	50,933	44,557	92,795
Deferred	1,586	8,836	(10,111)
Income tax expense (benefit)	52,519	53,393	82,684
Net income	$ 210,256	$ 203,850	$ 173,532
PER SHARE DATA
Basic earnings per share (in dollars per share)	$ 2.61	$ 2.40	$ 1.95
Diluted earnings per share (in dollars per share)	2.61	2.40	1.94
Dividends paid on common stock per share (in dollars per share)	$ 0.79	$ 0.67	$ 0.84
Basic weighted average number of shares outstanding (in shares)	80,471,316	85,008,040	88,905,457
Diluted weighted average number of shares outstanding (in shares)	80,495,163	85,109,843	89,224,207

Consolidated Statements of Comp

Consolidated Statements of Comprehensive Income - USD ($) $ in Thousands	12 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2017
Statement of Comprehensive Income [Abstract]
Net income	$ 210,256	$ 203,850	$ 173,532
Other comprehensive income (loss) net of tax:
Net unrealized gains (losses) on available-for-sale securities	39,195	(21,136)	(7,587)
Reclassification adjustment of net gain (loss) from sale of available-for-sale securities included in net income	(9)	0	3,499
Related tax benefit (expense)	(8,915)	6,156	1,503
Other comprehensive income (loss) on available-for-sale securities, net of tax	30,271	(14,980)	(2,585)
Net unrealized gain (loss) on long-term borrowing hedges	(30,127)	23,943	29,653
Related tax benefit (expense)	6,854	(5,684)	(10,897)
Other comprehensive income (loss) on cash flow hedges of borrowings, net of tax	(23,273)	18,259	18,756
Other comprehensive income (loss)	6,998	3,279	16,171
Comprehensive income	$ 217,254	$ 207,129	$ 189,703

Consolidated Statements of Stoc

Consolidated Statements of Stockholders' Equity - USD ($) $ in Thousands	Total	Common Stock	Paid-in Capital	Retained Earnings	Accumulated Other Comprehensive Income (Loss)	Treasury Stock
Balance, beginning of period at Sep. 30, 2016	$ 1,975,731	$ 134,308	$ 1,648,388	$ 943,877	$ (11,156)	$ (739,686)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	173,532			173,532
Other comprehensive income (loss)	16,171				16,171
Dividends on common stock	(74,519)			(74,519)
Proceeds from stock-based awards	7,238	317	6,921
Stock-based compensation expense	5,909	105	5,804
Repurchase of stock warrants	0	228	(228)
Treasury stock purchased	(98,374)					(98,374)
Balance, end of period at Sep. 30, 2017	2,005,688	134,958	1,660,885	1,042,890	5,015	(838,060)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Adjustment pursuant to adoption of ASU 2018-02	0			(1,772)	1,772
Net income	203,850			203,850
Other comprehensive income (loss)	3,279
Other comprehensive income (loss)	1,507				1,507
Dividends on common stock	(55,997)			(55,997)
Proceeds from stock-based awards	1,338	63	1,275
Stock-based compensation expense	4,771	209	4,562
Repurchase of stock warrants	0	113	(113)
Treasury stock purchased	(164,249)					(164,249)
Balance, end of period at Sep. 30, 2018	1,996,908	135,343	1,666,609	1,188,971	8,294	(1,002,309)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	210,256			210,256
Other comprehensive income (loss)	6,998				6,998
Dividends on common stock	(63,318)			(63,318)
Proceeds from stock-based awards	740	39	701
Stock-based compensation expense	5,265	119	5,146
Repurchase of stock warrants	0	39	(39)
Treasury stock purchased	(123,854)					(123,854)
Balance, end of period at Sep. 30, 2019	$ 2,032,995	$ 135,540	$ 1,672,417	$ 1,335,909	$ 15,292	$ (1,126,163)

Consolidated Statements of Cash

Consolidated Statements of Cash Flows - USD ($) $ in Thousands	12 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2017
CASH FLOWS FROM OPERATING ACTIVITIES
Net income	$ 210,256	$ 203,850	$ 173,532
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation, amortization and accretion expense	31,058	46,735	41,680
Cash received from (paid to) FDIC under loss share	0	1,595	584
Stock compensation expense	5,265	4,771	5,909
Provision (release) for loan losses	(1,650)	(5,450)	(2,100)
Loss (gain) on sale of investment securities	9	0	(3,499)
Decrease (increase) in accrued interest receivable	(1,562)	(5,652)	(3,974)
Decrease (increase) in federal and state income tax assets	1,804	(1,804)	16,047
Decrease (increase) in cash surrender value of bank owned life insurance	(5,822)	(5,992)	(6,498)
Gain on bank owned life insurance	0	(2,416)	(6,805)
Net realized (gain) loss on sales of premises and equipment and real estate owned	(12,484)	(1,450)	(1,673)
Decrease (increase) in other assets	(17,416)	(6,876)	7,974
Increase (decrease) in income tax liabilities	3,043	0	0
Increase (decrease) in accrued expenses and other liabilities	21,553	(36,609)	(41,477)
Net cash provided (used) by operating activities	234,054	190,702	179,700
CASH FLOWS FROM INVESTING ACTIVITIES
Origination of loans and principal repayments, net	(452,334)	(459,183)	(896,450)
Loans purchased	0	(143,605)	(72,856)
FHLB & FRB stock purchase	(532,600)	(530,000)	(183,609)
FHLB & FRB stock redeemed	535,800	525,800	177,824
Available-for-sale securities purchased	(358,709)	(272,780)	(76,367)
Principal payments and maturities of available-for-sale securities	224,118	199,008	367,713
Proceeds from sales of available-for-sale investment securities	491	0	362,829
Held-to-maturity securities purchased	0	(170,836)	(466,058)
Principal payments and maturities of held-to-maturity securities	178,147	187,812	229,716
Proceeds from sales of real estate owned	8,659	15,192	16,248
Proceeds from settlements of bank owned life insurance	0	3,484	10,096
Purchase of strategic investments	(5,000)	0	0
Net cash received (paid) in business combinations	0	(2,211)	(3,370)
Proceeds from sales of premises and equipment	15,585	1	5,209
Premises and equipment purchased and REO improvements	(35,530)	(27,127)	(15,461)
Net cash provided (used) by investing activities	(421,373)	(674,445)	(544,536)
CASH FLOWS FROM FINANCING ACTIVITIES
Net increase (decrease) in customer accounts	603,846	552,445	234,460
Proceeds from borrowings	13,315,000	13,250,000	4,590,000
Repayments of borrowings	(13,395,000)	(13,145,000)	(4,445,000)
Proceeds from stock-based awards and related tax benefit	740	1,338	7,238
Dividends paid on common stock	(63,318)	(55,997)	(74,519)
Treasury stock purchased	(123,854)	(164,249)	(98,374)
Increase (decrease) in advance payments by borrowers for taxes and insurance	413	786	13,733
Net cash provided (used) by financing activities	337,827	439,323	227,538
Increase (decrease) in cash and cash equivalents	150,508	(44,420)	(137,298)
Cash and cash equivalents at beginning of year	268,650	313,070	450,368
Cash and cash equivalents at end of year	419,158	268,650	313,070
Non-cash investing activities
Real estate acquired through foreclosure	1,839	4,032	3,266
Other personal property acquired through foreclosure	205	3,109	0
Non-cash financing activities
Stock issued upon exercise of warrants	1,082	3,914	7,632
Cash paid during the year for
Interest	194,277	133,722	111,333
Income taxes	$ 33,545	$ 44,260	$ 54,078

Summary of Significant Accounti

Summary of Significant Accounting Policies	12 Months Ended
	Sep. 30, 2019
Accounting Policies [Abstract]
Summary of Significant Accounting Policies	SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES Company and nature of operations. Washington Federal Bank, National Association, a federally-insured national bank dba WaFd Bank (the “Bank” or “WaFd Bank”), was founded on April 24, 1917 in Ballard, Washington and is engaged primarily in providing lending, depository, insurance and other banking services to consumers, mid-sized to large businesses, and owners and developers of commercial real estate. Washington Federal, Inc., a Washington corporation (the “Company”), was formed as the Bank’s holding company in November, 1994. As used throughout this document, the terms “Washington Federal” or the “Company” refer to the Company and its consolidated subsidiaries, and the term “Bank” refers to the operating subsidiary, Washington Federal Bank, National Association. The Company is headquartered in Seattle, Washington. The Bank conducts its activities through a network of 234 bank branches located in Washington, Oregon, Idaho, Utah, Arizona, Nevada, New Mexico and Texas. Basis of presentation and use of estimates. The Company’s accounting and financial reporting policies conform to accounting principles generally accepted in the United States of America (U.S. GAAP). Inter-company balances and transactions have been eliminated in consolidation. In preparing the consolidated financial statements, the Company makes estimates and assumptions that affect the reported amounts of assets and liabilities as of the date of the financial statements and revenues and expenses during the reporting periods and related disclosures. The areas that require application of significant management judgments often result in the need to make estimates about the effect of matters that are inherently uncertain and may change in future periods. Actual results could differ materially from those estimates. Certain amounts in the financial statements from prior periods have been reclassified to conform to the current financial statement presentation. In certain instances, amounts in text are presented by rounding to the nearest thousand. The Company's fiscal year end is September 30. All references to 2019 , 2018 and 2017 represent balances as of September 30, 2019 , September 30, 2018 , and September 30, 2017 , or activity for the fiscal years then ended. 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. Restricted cash balances - Based on the level of vault cash on hand, the Company was not required to maintain cash reserve balances with the Federal Reserve Bank as of September 30, 2019 . As of September 30, 2019 and September 30, 2018 , the Company pledged cash collateral related to derivative contracts of $31,850,000 and $18,000,000 , respectively. Equity securities - The Company records equity securities within Other assets in its Consolidated Statements of Financial Condition. Investments in equity securities with readily determinable fair values (marketable) are measured at fair value, with changes in the fair value recognized as a component of Other income in the Consolidated Statements of Operations. Investments in equity investments that do not have readily determinable fair values (non-marketable) are accounted for at cost minus impairment, if any, plus or minus changes resulting from observable price changes in orderly transactions for the identical or similar investment of the same issuer, also referred to as the measurement alternative. Any adjustments to the carrying value of these investments are recorded in Other income in the Consolidated Statements of Operations. Debt securities, including mortgage-backed securities. The Company accounts for debt securities in two categories: held-to-maturity and available-for-sale. Premiums and discounts on debt securities are deferred and recognized into income over the contractual life of the asset using the effective interest method. 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 accounted for at fair value. 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 net of the related tax effect in the accumulated other comprehensive income component of shareholders' equity. Realized gains and losses on securities sold as well as other-than-temporary impairment charges, if any, are shown on the Consolidated Statements of Operations under the Other income heading. Management evaluates debt securities for other-than- temporary impairment on a quarterly basis based on the securities' current credit quality, market interest rates, term to maturity and management's intent to sell the securities. Off-balance-sheet credit exposures - The only material off-balance-sheet credit exposures are loans in process and unused lines of credit, which had a combined balance of $2,379,089,000 and $2,180,162,000 at September 30, 2019 and September 30, 2018 , respectively. The Company estimates losses on off-balance-sheet credit exposures by allocating a loss percentage derived from historical loss factors for each asset class. Loans receivable. Loans that are performing in accordance with their contractual terms are carried at the unpaid principal balance, net of premiums, discounts and net deferred loan fees. Net deferred loan fees include nonrefundable loan origination fees less direct loan origination costs. Net deferred loan fees, premiums and discounts are amortized into interest income using either the interest method or straight-line method over the terms of the loans, adjusted for actual prepayments. In addition to fees and costs for originating loans, various other fees and charges related to existing loans may occur, including prepayment charges, late charges and assumption fees. When a borrower fails to make a required payment on a loan, the Bank 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 Bank 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 Bank. Restructured loans. The Bank 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 Bank 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 100 to 200 bps for a specific term, usually six to 12 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, the borrower’s ability to repay is evaluated, including: current income levels and debt to income ratio, borrower’s credit score, payment history of the loan and updated evaluation of the secondary repayment source. The Bank 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. Non-accrual loans. 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 Bank 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 Bank 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 is not expected to 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 management concludes that full repayment is probable based on internal evaluation, it will remain on accrual status following restructuring. If the restructured consumer loan does not perform, it is placed on 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, management will conclude that collection of the entire principal and interest due is still in doubt. In those instances, the loan will remain on non-accrual status. Impaired loans. Impaired loans consist of loans receivable that are not expected to have their principal and interest repaid in accordance with their contractual terms. 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. Allowance for loan losses. The Bank 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 Bank's general methodology for assessing the appropriateness of the allowance is to apply 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 Bank 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 deplete 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 QLFs 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 Bank has also established a reserve for unfunded commitments. The recovery of the carrying value of loans is susceptible to future market conditions beyond the Bank's control, which may result in losses or recoveries differing from those estimated. 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 Bank 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 accounting hedges under FASB 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 fee income earned on the swaps that is included in loan fee income. Borrowing hedges. The Company has entered into interest rate swaps to convert a series of future short-term borrowings to fixed-rate payments. These interest rate swaps qualify as cash flow hedging instruments under ASC 815 so gains and losses are recorded in Other Comprehensive Income to the extent the hedge is effective. Gains and losses on the interest rate swaps are reclassified from OCI to earnings in the period the hedged transaction affects earnings and are included in the same income statement line item that the hedged transaction is recorded. Last-of-layer loan portfolio hedges. The Company has entered into interest rate swaps to hedge the portion of the respective closed portfolios of prepayable mortgage loans that are expected to remain at the end of the hedge term. These hedges qualify as last-of-layer hedges under ASC 815 and provide for matching of the recognition of the gains and losses on the interest rate swap and the related hedged item. Commercial loan hedges. The Company has entered into interest rate swaps to hedge long term fixed rate commercial loans. These hedges qualify as fair value hedges under ASC 815 and provide for matching of the recognition of the gains and losses on the interest rate swap and the related hedged loan. 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. Costs for improvements are capitalized. Charges for ordinary maintenance and repairs are expensed to operations as incurred. Real estate owned. Real estate properties acquired through foreclosure of loans or through acquisitions are recorded initially at fair value less selling costs and are subsequently recorded at lower of cost or fair value. Costs for improvements are capitalized. Any gains (losses) and maintenance costs are recorded in Gain (loss) on real estate owned, net. Intangible assets. Goodwill represents the excess of the cost of businesses acquired over the fair value of the net assets acquired. Other intangibles, including core deposit intangibles, are acquired assets that lack physical substance but can be distinguished from goodwill. Goodwill is evaluated for impairment on an annual basis during the fourth quarter. 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. The Bank amortizes the core deposit intangibles over their estimated lives using an accelerated method. The table below provides detail regarding the Company's intangible assets. Goodwill Core Deposit and Other Intangibles Total (In thousands) Balance at September 30, 2017 $ 293,153 $ 5,529 $ 298,682 Additions (1) 8,215 6,595 14,810 Amortization (2) — (2,206 ) (2,206 ) Balance at September 30, 2018 301,368 9,918 311,286 Additions — — — Amortization — (2,039 ) (2,039 ) Balance at September 30, 2019 $ 301,368 $ 7,879 $ 309,247 (1) During 2018 , an immaterial correction was recorded related to acquisitions of insurance agency businesses in prior years. The balance sheet classification correction resulted in an increase in goodwill of $7,135,000 and finite-lived intangible assets of $5,106,000 and a corresponding decrease in other assets of $12,241,000 . (2) During 2018 , an immaterial correction of $1,500,000 was recorded to amortization expense for intangible assets stemming from acquisitions of insurance agency businesses in prior years. The table below presents the estimated future amortization expense of core deposit and other intangibles for the next five years. Fiscal Year Expense (In thousands) 2020 $ 1,984 2021 1,140 2022 804 2023 775 2024 755 Income taxes. Income taxes are accounted for using the asset and liability method, which requires the recognition of deferred tax assets and liabilities for the expected future tax consequences of events that have been included in the financial statements. Under this method, a deferred tax asset or liability is determined based on the temporary differences between the financial statement and corresponding tax treatment of income, gains, losses, deductions or credits using enacted tax rates in effect for the year in which the differences are expected to reverse. The provision for income taxes includes current and deferred income tax expense based on net income adjusted for temporary and permanent differences such as depreciation, loan loss reserve, tax-exempt interest, and affordable housing tax credits. Reserves for uncertain tax positions, together with any related interest and penalties, if applicable, and amortization of affordable housing tax credit investments are recorded within income tax expense. Accounting for stock-based compensation. We recognize in the statement of operations the grant-date fair value of stock options and other equity-based forms of compensation issued to employees over the employees' requisite service period (generally the vesting period). The requisite service period may be subject to performance conditions. Stock options and restricted stock awards generally vest ratably over two to five years and are recognized as expense over that same period of time. The exercise price of each option equals the market price of the Company's common stock on the date of the grant, and the maximum term is ten years . Certain grants of restricted stock are subject to performance-based and market-based vesting as well as other approved vesting conditions and cliff vest based on those conditions. Compensation expense is recognized over the service period to the extent restricted stock awards are expected to vest. See Note O for additional information. Business segments. As the Company manages its business and operations on a consolidated basis, management has determined that there is one reportable business segment. Regulatory matters. On February 28, 2018, pursuant to a Stipulation and Consent to the Issuance of a Consent Order (the “Consent Order”), the Office of the Comptroller of the Currency issued a Consent Order relating to the Bank, the terms of which are intended to further enhance its BSA program. The Consent Order requires the Bank to create a BSA-focused action plan, supplement existing customer due diligence policies and procedures, perform a BSA risk assessment, perform a transaction activity look-back, enhance training, and complete independent testing. The Bank has not been informed that this action includes the assessment of a civil money penalty. The Bank is working cooperatively with the OCC to implement the necessary changes to comply with the provisions of the Consent Order. Subsequent events. The Company has evaluated subsequent events for adjustment to or disclosure in the Company’s consolidated financial statements through the date of this report, and the Company has not identified any recordable or disclosable events, not otherwise reported in these consolidated financial statements or the notes thereto, except for the following. On October 29, 2019 , the Company issued a press release announcing a quarterly cash dividend of 21 cents per share to be paid on November 22, 2019 , to common shareholders of record as of November 8, 2019 . This is Washington Federal’s 147 th consecutive quarterly cash dividend.

New Accounting Pronouncements

New Accounting Pronouncements	12 Months Ended
	Sep. 30, 2019
Accounting Policies [Abstract]
New Accounting Pronouncements	NEW ACCOUNTING PRONOUNCEMENTS In April 2019, the Financial Accounting Standards Board (“FASB”) issued Accounting Standards Update (“ASU”) 2019-04, Codification Improvements to Topic 326, Financial Instruments-Credit Losses, Topic 815, Derivatives and Hedging, and Topic 825, Financial Instruments , that clarifies and improves areas of guidance related to the recently issued standards on credit losses (ASU 2016-13), hedging (ASU 2017-12), and recognition and measurement of financial instruments (ASU 2016-01). The amendments generally have the same effective dates as their related standards. If already adopted, the amendments of ASU 2016-01 and ASU 2016-13 are effective for fiscal years beginning after December 15, 2019 and the amendments of ASU 2017-12 are effective as of the beginning of the Company’s next annual reporting period; early adoption is permitted. The Company previously adopted both ASU 2017-12 and ASU 2016-01 and does not expect the amendments of ASU 2019-04 will have a material impact on its consolidated financial statements. The Company is continuing to evaluate the impact of ASU 2016-13 and will consider the amendments of ASU 2019-04 as part of that process. In August 2018, the FASB issued ASU 2018-15, Customer’s Accounting for Implementation Costs Incurred in a Cloud Computing Arrangement That is a Service Contract . The amendments in this ASU align the requirements for capitalizing implementation costs incurred in a hosting arrangement that is a service contract with the requirements for capitalizing implementation costs incurred to develop or obtain internal-use software. The amendments also require the entity to expense the capitalized implementation costs of a hosting arrangement that is a service contract over the term of the hosting arrangement, including reasonably certain renewal periods. The amendments in the ASU are effective for fiscal years beginning after December 15, 2019 and interim periods within those fiscal years. Early adoption is permitted, including adoption in any interim period. The Company is assessing the impact that this guidance will have on its consolidated financial statements. In August 2018, the FASB issued ASU 2018-13, Fair Value Measurement (Topic 820): Disclosure Framework - Changes to the Disclosure Requirements for Fair Value Measurement . This ASU adds, eliminates, and modifies certain disclosure requirements for fair value measurements. Among the changes, entities will no longer be required to disclose the amount of and reasons for transfers between Level 1 and Level 2 of the fair value hierarchy, but will be required to disclose the range and weighted average used to develop significant unobservable inputs for Level 3 fair value measurements. The ASU is effective for interim and annual reporting periods beginning after December 15, 2019; early adoption is permitted. Entities are also allowed to elect early adoption of the eliminated or modified disclosure requirements and delay adoption of the added disclosure requirements until their effective date. As the ASU only revises disclosure requirements, this guidance will not have a material impact on the Company's consolidated financial statements. In June 2016, the FASB issued ASU 2016-13, Financial Instruments - Credit Losses . The ASU, as amended, is intended to provide financial statement users with more decision-useful information about the expected credit losses on financial instruments that are not accounted for at fair value through net income, including loans held for investment, held-to-maturity debt securities, trade and other receivables, net investments in leases and other commitments to extend credit held by a reporting entity at each reporting date. The amendments require that financial assets measured at amortized cost be presented at the net amount expected to be collected, through an allowance for credit losses that is deducted from the amortized cost basis. The ASU eliminates the current framework of recognizing probable incurred losses and instead requires an entity to use its current estimate of all expected credit losses over the contractual life. The measurement of expected credit losses is based upon historical experience, current conditions, and reasonable and supportable forecasts that affect the collectability of the financial assets. For purchased financial assets with a more-than-insignificant amount of credit deterioration since origination (“PCD assets”) that are measured at amortized cost, an allowance for expected credit losses is recorded as an adjustment to the cost basis of the asset. Subsequent changes in estimated cash flows would be recorded as an adjustment to the allowance and through the statement of income. Credit losses relating to available-for-sale debt securities will be recorded through an allowance for credit losses rather than as a direct write-down to the security's cost basis. The amendments in this ASU are effective for fiscal years beginning after December 15, 2019, including interim periods within those fiscal years. For most debt securities, the transition approach requires a cumulative-effect adjustment to the statement of financial position as of the beginning of the first reporting period the guidance is effective. For other-than-temporarily impaired debt securities and PCD assets, the guidance will be applied prospectively. The Company is currently in the process of evaluating the impact of the amended guidance on its consolidated financial statements and the reserve for credit losses may increase upon adoption given that the allowance will be required to cover the full remaining expected life of the portfolio upon adoption, rather than the incurred loss model under current U.S. GAAP. The extent of this increase is still being evaluated and will depend on economic conditions and the composition of the Company’s loan, lease and held-to-maturity securities portfolios at the time of adoption. In February 2016, the FASB issued ASU 2016-02, Leases. The ASU, as amended, requires lessees to recognize a lease liability, which is a lessee's obligation to make lease payments arising from a lease, and a right-of-use asset, which is an asset that represents the lessee's right to use, or control the use of, a specified asset for the lease term. The guidance also simplifies the accounting for sale and leaseback transactions and introduces new disclosure requirements for leasing arrangements. Accounting by lessors is largely unchanged. The amendments are effective for fiscal years beginning after December 15, 2018, including interim periods within those fiscal years. The Company has adopted the standard effective October 1, 2019 utilizing the transition method allowed under ASU 2018-11 and will not restate comparative periods. The Company leases a number of properties under non-cancelable operating leases which will be subject to this ASU. We have elected the package of practical expedients permitted under the transition guidance, which allows us to carryforward our historical lease classification and our assessment on whether a contract is or contains a lease. We have also elected to keep leases with an initial term of 12 months or less off the balance sheet. The adoption of the new standard has resulted in an increase in other assets and an increase in other liabilities on October 1, 2019 that is not material. The Company has recognized no cumulative effect adjustment to the beginning balance of retained earnings upon adoption and there will be no material impact to our Consolidated Statement of Income as a result of this ASU.

Investment Securities

Investment Securities	12 Months Ended
	Sep. 30, 2019
Investments, Debt and Equity Securities [Abstract]
Investment Securities	INVESTMENT SECURITIES The tables below provide detail regarding the amortized cost and fair value of available-for-sale and held-to-maturity investment securities. September 30, 2019 Amortized Cost Gross Unrealized Fair Value Yield Gains Losses (In thousands) Available-for-sale securities U.S. government and agency securities due 5 to 10 years $ 65,287 $ 39 $ (629 ) $ 64,697 2.43 % Over 10 years 207,067 1 (987 ) 206,081 3.02 Corporate debt securities due Within 1 year 43,903 411 — 44,314 3.65 1 to 5 years 70,000 689 (50 ) 70,639 3.29 5 to 10 years 92,931 1,879 — 94,810 3.27 Municipal bonds due 1 to 5 years 1,430 14 — 1,444 1.94 Over 10 years 20,303 895 — 21,198 6.45 Mortgage-backed securities Agency pass-through certificates 957,150 26,533 (1,124 ) 982,559 3.29 1,458,071 30,461 (2,790 ) 1,485,742 3.27 Held-to-maturity securities Mortgage-backed securities Agency pass-through certificates 1,428,480 19,945 (337 ) 1,448,088 3.15 Commercial MBS 15,000 7 — 15,007 2.89 1,443,480 19,952 (337 ) 1,463,095 3.15 $ 2,901,551 $ 50,413 $ (3,127 ) $ 2,948,837 3.21 % September 30, 2018 Amortized Cost Gross Unrealized Fair Value Yield Gains Losses (In thousands) Available-for-sale securities U.S. government and agency securities due 5 to 10 years $ 60,872 $ — $ (1,473 ) $ 59,399 2.55 % Over 10 years 148,099 109 (314 ) 147,894 3.05 Equity securities 1 to 5 years 500 — (12 ) 488 1.80 Corporate debt securities due 1 to 5 years 113,762 1,875 (13 ) 115,624 3.59 5 to 10 years 69,965 35 (929 ) 69,071 3.23 Municipal bonds due 1 to 5 years 1,398 — (24 ) 1,374 2.05 Over 10 years 20,323 1,281 — 21,604 6.45 Mortgage-backed securities Agency pass-through certificates 908,092 1,383 (13,434 ) 896,041 3.29 Commercial MBS 3,460 2 — 3,462 4.36 1,326,471 4,685 (16,199 ) 1,314,957 3.30 Held-to-maturity securities Mortgage-backed securities Agency pass-through certificates 1,610,420 305 (76,983 ) 1,533,742 3.16 Commercial MBS 15,000 28 — 15,028 3.03 1,625,420 333 (76,983 ) 1,548,770 3.16 $ 2,951,891 $ 5,018 $ (93,182 ) $ 2,863,727 3.22 % The Company purchased $358,709,000 of available-for-sale investment securities and no held-to-maturity investment securities during 2019 . Sales of available-for-sale securities totaled $491,000 and there were no sales of held-to-maturity investment securities in 2019 . Substantially all mortgage-backed securities have contractual due dates that exceed 25 years. The following table shows the gross unrealized losses and fair value of securities at September 30, 2019 , and September 30, 2018 , by length of time that individual securities in each category have been in a continuous loss position. Management believes that the declines in fair value of these investments are not an other-than-temporary impairment as these losses are due to a change in interest rates rather than any credit deterioration. The impairment is also deemed to be temporary because: 1) the Company does not intend to sell the security, and 2) it is not more likely than not that it will be required to sell the security before recovery of the entire amortized cost basis of the security. September 30, 2019 Less than 12 months 12 months or more Total Unrealized Gross Losses Fair Value Unrealized Gross Losses Fair Value Unrealized Gross Losses Fair Value (In thousands) Corporate debt securities $ — $ — $ (50 ) $ 24,950 $ (50 ) $ 24,950 U.S. government and agency securities (656 ) 152,715 (960 ) 77,391 (1,616 ) 230,106 Mortgage-backed securities (148 ) 87,895 (1,313 ) 270,802 (1,461 ) 358,697 $ (804 ) $ 240,610 $ (2,323 ) $ 373,143 $ (3,127 ) $ 613,753 September 30, 2018 Less than 12 months 12 months or more Total Unrealized Gross Losses Fair Value Unrealized Gross Losses Fair Value Unrealized Gross Losses Fair Value (In thousands) Corporate debt securities $ (929 ) $ 49,072 $ (14 ) $ 24,988 $ (943 ) $ 74,060 Municipal bonds (24 ) 1,374 — — (24 ) 1,374 U.S. government and agency securities (141 ) 37,565 (1,645 ) 76,499 (1,786 ) 114,064 Equity securities (12 ) 488 — — (12 ) 488 Mortgage-backed securities (28,748 ) 1,035,754 (61,669 ) 1,183,017 (90,417 ) 2,218,771 $ (29,854 ) $ 1,124,253 $ (63,328 ) $ 1,284,504 $ (93,182 ) $ 2,408,757

Loans Receivable

Loans Receivable	12 Months Ended
	Sep. 30, 2019
Receivables [Abstract]
Loans Receivable	LOANS RECEIVABLE The following table is a summary of loans receivable. September 30, 2019 September 30, 2018 (In thousands) (In thousands) Gross loans by category Single-family residential $ 5,835,194 43.8 % $ 5,798,966 45.1 % Construction 2,038,052 15.3 1,890,668 14.7 Construction - custom 540,741 4.1 624,479 4.9 Land - acquisition & development 204,107 1.5 155,204 1.2 Land - consumer lot loans 99,694 0.7 102,036 0.8 Multi-family 1,422,674 10.7 1,385,125 10.8 Commercial real estate 1,631,170 12.3 1,452,168 11.3 Commercial & industrial 1,268,695 9.5 1,140,874 8.9 HELOC 142,178 1.1 130,852 1.0 Consumer 129,883 1.0 173,306 1.3 Total gross loans 13,312,388 100 % 12,853,678 100 % Less: Allowance for probable losses 131,534 129,257 Loans in process 1,201,341 1,195,506 Net deferred fees, costs and discounts 48,938 51,834 Total loan contra accounts 1,381,813 1,376,597 Net loans $ 11,930,575 $ 11,477,081 The following summary breaks down the Company's fixed rate and adjustable rate loans by time to maturity or to rate adjustment. September 30, 2019 Fixed-Rate Adjustable-Rate Term To Maturity Gross Loans % of Gross Loans Term To Rate Adjustment Gross Loans % of Gross Loans (In thousands) (In thousands) Within 1 year $ 135,426 1.0 % Less than 1 year $ 4,056,238 30.5 % 1 to 3 years 416,285 3.1 1 to 3 years 558,197 4.2 3 to 5 years 341,838 2.6 3 to 5 years 489,151 3.7 5 to 10 years 993,685 7.5 5 to 10 years 110,934 0.8 10 to 20 years 1,059,127 8.0 10 to 20 years 32,242 0.2 Over 20 years 5,101,241 38.3 Over 20 years 18,024 0.1 $ 8,047,602 60.5 % $ 5,264,786 39.5 % The following tables provide information regarding loans receivable by loan category and geography. September 30, 2019 Single - Multi- Land - Land - Construction - custom Construction Commercial Commercial Consumer HELOC Total (In thousands) Washington $ 3,125,058 $ 351,771 $ 82,891 $ 61,534 $ 315,615 $ 482,453 $ 530,165 $ 521,049 $ 90,263 $ 83,818 $ 5,644,617 Oregon 694,577 353,388 50,195 13,228 61,699 430,749 294,574 287,922 1,376 14,780 2,202,488 Arizona 575,256 331,088 18,871 10,990 58,550 262,400 246,041 78,590 1,642 12,570 1,595,998 Utah 527,142 58,865 — 4,116 45,277 246,097 74,454 40,368 127 7,458 1,003,904 Texas 161,616 82,598 2,936 416 1,889 420,627 165,692 165,646 467 — 1,001,887 New Mexico 205,559 174,485 32,443 2,049 17,775 68,120 194,621 15,379 1,162 11,474 723,067 Idaho 321,184 43,446 16,771 4,658 27,499 88,956 91,725 34,125 84 8,932 637,380 Nevada 190,941 26,837 — 2,694 12,437 — 32,094 20,426 95 3,129 288,653 Other 33,861 196 — 9 — 38,650 1,804 105,190 34,667 17 214,394 $ 5,835,194 $ 1,422,674 $ 204,107 $ 99,694 $ 540,741 $ 2,038,052 $ 1,631,170 $ 1,268,695 $ 129,883 $ 142,178 $ 13,312,388 Percentage by geographic area September 30, 2019 Single - Multi- Land - Land - Construction - custom Construction Commercial Commercial Consumer HELOC Total As % of total gross loans Washington 23.5 % 2.7 % 0.7 % 0.5 % 2.5 % 3.6 % 4.1 % 3.8 % 0.7 % 0.6 % 42.7 % Oregon 5.2 2.7 0.4 0.1 0.5 3.2 2.2 2.2 — 0.1 16.6 Arizona 4.3 2.5 0.1 0.1 0.4 2.0 1.8 0.6 — 0.1 11.9 Utah 4.0 0.4 — — 0.3 1.8 0.6 0.3 — 0.1 7.5 Texas 1.2 0.6 — — — 3.2 1.2 1.2 — — 7.4 New Mexico 1.5 1.3 0.2 — 0.1 0.5 1.5 0.1 — 0.1 5.3 Idaho 2.4 0.3 0.1 — 0.2 0.7 0.7 0.3 — 0.1 4.8 Nevada 1.4 0.2 — — 0.1 — 0.2 0.2 — — 2.1 Other 0.3 — — — — 0.3 — 0.8 0.3 — 1.7 43.8 % 10.7 % 1.5 % 0.7 % 4.1 % 15.3 % 12.3 % 9.5 % 1.0 % 1.1 % 100 % Percentage by geographic area as a % of each loan type September 30, 2019 Single - Multi- Land - Land - Construction - custom Construction Commercial Commercial Consumer HELOC As % of total gross loans Washington 53.6 % 24.7 % 40.6 % 61.7 % 58.4 % 23.7 % 32.5 % 41.1 % 69.5 % 59.0 % Oregon 11.9 24.8 24.6 13.3 11.4 21.1 18.1 22.7 1.1 10.4 Arizona 9.9 23.3 9.2 11.0 10.8 12.9 15.1 6.2 1.3 8.8 Utah 9.0 4.1 — 4.1 8.4 12.1 4.6 3.2 0.1 5.2 Texas 2.8 5.8 1.4 0.4 0.3 20.6 10.2 13.1 0.4 — New Mexico 3.5 12.3 15.9 2.1 3.3 3.3 11.9 1.2 0.9 8.1 Idaho 5.5 3.1 8.2 4.7 5.1 4.4 5.6 2.7 0.1 6.3 Nevada 3.3 1.9 — 2.7 2.3 — 2.0 1.6 0.1 2.2 Other 0.6 — — — — 1.9 0.1 8.3 26.7 — 100 % 100 % 100 % 100 % 100 % 100 % 100 % 100 % 100 % 100 % The Company has granted loans to officers and directors of the Company and related interests. These loans are made on the same terms, including interest rates and collateral, as those prevailing at the time for comparable transactions with unrelated persons and do not involve more than the normal risk of collectability. The aggregate dollar amount of these loans, including unfunded commitments to lend, was $76,288,000 and $70,012,000 at September 30, 2019 and 2018 , respectively. As of September 30, 2019 , all of these loans were performing in accordance with contractual terms. The following table provides additional information on impaired loans, loan commitments and loans serviced for others. September 30, 2019 September 30, 2018 (In thousands) Recorded investment in impaired loans $ 149,546 $ 199,545 TDRs included in impaired loans 121,677 156,858 Specific reserves on impaired loans 439 517 Average balance of impaired loans for year ended 175,187 228,398 Interest income from impaired loans for year ended 7,918 10,232 Outstanding fixed-rate origination commitments 357,247 400,426 Gross loans serviced for others 102,282 77,958 The following table sets forth information regarding non-accrual loans. September 30, 2019 September 30, 2018 (In thousands) (In thousands) Non-accrual loans: Single-family residential $ 25,271 74.9 % $ 27,643 49.6 % Construction — — 2,427 4.4 Land - acquisition & development 169 0.5 920 1.7 Land - consumer lot loans 246 0.7 787 1.4 Commercial real estate 5,835 17.3 8,971 16.1 Commercial & industrial 1,292 3.8 14,394 25.8 HELOC 907 2.7 523 0.9 Consumer 11 — 21 — Total non-accrual loans $ 33,731 100 % $ 55,686 100 % Non-accrual loans as % of total loans 0.28 % 0.49 % The following tables break down delinquent loans by loan category and delinquency bucket. September 30, 2019 Amount of Loans Days Delinquent Based on $ Amount of Loans % based on $ Loan type Net of Loans in Process Current 30 60 90 Total (In thousands) Single-family residential $ 5,835,186 $ 5,809,239 $ 3,672 $ 3,211 $ 19,064 $ 25,947 0.44 % Construction 1,164,889 1,164,889 — — — — — Construction - custom 255,505 255,505 — — — — — Land - acquisition & development 161,194 161,194 — — — — — Land - consumer lot loans 99,694 98,916 112 619 47 778 0.78 Multi-family 1,422,652 1,422,652 — — — — — Commercial real estate 1,631,171 1,625,509 1,614 285 3,763 5,662 0.35 Commercial & industrial 1,268,695 1,267,828 — — 867 867 0.07 HELOC 142,178 140,718 580 183 697 1,460 1.03 Consumer 129,883 129,227 295 117 244 656 0.51 Total Loans $ 12,111,047 $ 12,075,677 $ 6,273 $ 4,415 $ 24,682 $ 35,370 0.29 % Delinquency % 99.71% 0.05% 0.04% 0.20% 0.29% September 30, 2018 Amount of Loans Days Delinquent Based on $ Amount of Loans % based on $ Loan type Net of Loans in Process Current 30 60 90 Total (In thousands) Single-family residential $ 5,798,353 $ 5,768,253 $ 7,983 $ 3,562 $ 18,555 $ 30,100 0.52 % Construction 1,062,855 1,060,428 — — 2,427 2,427 0.23 Construction - custom 289,192 289,192 — — — — — Land - acquisition & development 123,560 122,620 — 270 670 940 0.76 Land - consumer lot loans 101,908 101,294 144 117 353 614 0.60 Multi-family 1,385,103 1,385,103 — — — — — Commercial real estate 1,452,169 1,448,946 316 1,767 1,140 3,223 0.22 Commercial & industrial 1,140,874 1,130,836 — — 10,038 10,038 0.88 HELOC 130,852 129,510 567 469 306 1,342 1.03 Consumer 173,306 172,777 172 328 29 529 0.31 Total Loans $ 11,658,172 $ 11,608,959 $ 9,182 $ 6,513 $ 33,518 $ 49,213 0.42 % Delinquency % 99.58% 0.08% 0.06% 0.29% 0.42% 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 100 to 200 bps for a specific term, usually six to 12 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, 2019 , the outstanding balance of TDR's was $121,677,000 as compared to $156,858,000 as of September 30, 2018 . As of September 30, 2019 , 95.9% of the restructured loans were performing. Single-family residential loans comprised 92.0% of TDR loans as of September 30, 2019 . The Company 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 table provides information related to loans that were modified in a TDR during the periods presented. Twelve Months Ended September 30, 2019 Twelve Months Ended September 30, 2018 Pre-Modification Post-Modification Pre-Modification Post-Modification Outstanding Outstanding Outstanding Outstanding Number of Recorded Recorded Number of Recorded Recorded Troubled Debt Restructurings: Contracts Investment Investment Contracts Investment Investment (In thousands) (In thousands) Single-family residential 8 $ 1,225 $ 1,225 27 $ 5,070 $ 5,070 Land - acquisition & development — — — 1 107 107 Land - consumer lot loans 1 40 40 — — — Commercial real estate — — — 1 120 120 Commercial & industrial — — — 4 7,739 7,739 HELOC — — — 2 95 95 Consumer — — — 1 — — 9 $ 1,265 $ 1,265 36 $ 13,131 $ 13,131 The following table provides information on payment defaults occurring during the periods presented where the loan had been modified in a TDR within 12 months of the payment default. Twelve Months Ended September 30, 2019 Twelve Months Ended September 30, 2018 Number of Recorded Number of Recorded TDRs That Subsequently Defaulted: Contracts Investment Contracts Investment (In thousands) (In thousands) Single-family residential 7 $ 1,546 4 $ 433 HELOC — — 1 77 7 $ 1,546 5 $ 510

Allowance for Loan Losses

Allowance for Loan Losses	12 Months Ended
	Sep. 30, 2019
Receivables [Abstract]
Allowance for Loan Losses	ALLOWANCE FOR LOAN LOSSES The following tables summarize the activity in the allowance for loan losses. Twelve Months Ended September 30, 2019 Beginning Allowance Charge-offs Recoveries Provision & Transfers Ending Allowance (In thousands) Single-family residential $ 33,033 $ (268 ) $ 1,020 $ (2,797 ) $ 30,988 Construction 31,317 — 99 888 32,304 Construction - custom 1,842 (1,973 ) — 1,500 1,369 Land - acquisition & development 7,978 (107 ) 7,457 (6,173 ) 9,155 Land - consumer lot loans 2,164 (804 ) 719 64 2,143 Multi-family 8,329 — — (938 ) 7,391 Commercial real estate 11,852 (428 ) 1,102 644 13,170 Commercial & industrial 28,702 (5,782 ) 3,443 5,087 31,450 HELOC 781 (1,086 ) 46 1,362 1,103 Consumer 3,259 (1,028 ) 1,167 (937 ) 2,461 $ 129,257 $ (11,476 ) $ 15,053 $ (1,300 ) $ 131,534 Twelve Months Ended September 30, 2018 Beginning Allowance Charge-offs Recoveries Provision & Transfers Ending Allowance (In thousands) Single-family residential $ 36,892 $ (1,142 ) $ 757 $ (3,474 ) $ 33,033 Construction 24,556 — — 6,761 31,317 Construction - custom 1,944 (50 ) — (52 ) 1,842 Land - acquisition & development 6,829 (13 ) 14,223 (13,061 ) 7,978 Land - consumer lot loans 2,649 (67 ) 35 (453 ) 2,164 Multi-family 7,862 — — 467 8,329 Commercial real estate 11,818 (36 ) 189 (119 ) 11,852 Commercial & industrial 28,524 (3,574 ) 714 3,038 28,702 HELOC 855 (668 ) 71 523 781 Consumer 1,144 (382 ) 993 1,504 3,259 $ 123,073 $ (5,932 ) $ 16,982 $ (4,866 ) $ 129,257 The Company recorded a release of allowance for loan losses of $1,650,000 during the year ended September 30, 2019 , as compared to a release of $5,450,000 for the year ended September 30, 2018 . The credit quality of the portfolio has remained strong and economic conditions remain relatively stable. The Company had recoveries, net of charge-offs, of $3,577,000 for the year ended September 30, 2019 , compared with net recoveries of $11,050,000 for the year ended September 30, 2018 . A loan is charged-off when the loss is estimable and it is confirmed that the borrower is not expected to be able to meet its contractual obligations. Non-accrual loans decreased to $33,731,000 as of September 30, 2019 , from $55,686,000 as of September 30, 2018 . Non-performing assets (“NPAs”) totaled $43,826,000 , or 0.27% of total assets, at September 30, 2019 , compared to $70,093,000 , or 0.44% of total assets, as of September 30, 2018 . At September 30, 2019 , $131,095,000 of the allowance was calculated under the Company's general allowance methodology and the remaining $439,000 represents specific reserves on loans deemed to be individually impaired. The following tables show a summary of loans collectively and individually evaluated for impairment and the related general and specific reserves. September 30, 2019 Loans Collectively Evaluated for Impairment Loans Individually Evaluated for Impairment General Reserve Allocation Recorded Investment of Loans Ratio Specific Reserve Allocation Recorded Investment of Loans Ratio (In thousands) (In thousands) Single-family residential $ 30,988 $ 5,822,200 0.5 % $ — $ 17,978 — % Construction 32,304 1,164,889 2.8 — — — Construction - custom 1,369 255,505 0.5 — — — Land - acquisition & development 9,135 160,964 5.7 20 230 8.7 Land - consumer lot loans 2,143 95,574 2.2 — 375 — Multi-family 7,387 1,422,266 0.5 4 385 1.0 Commercial real estate 12,847 1,618,406 0.8 323 12,765 2.5 Commercial & industrial 31,358 1,266,913 2.5 92 1,805 5.1 HELOC 1,103 140,378 0.8 — 837 — Consumer 2,461 129,527 1.9 — 50 — $ 131,095 $ 12,076,622 1.1 % $ 439 $ 34,425 1.3 % September 30, 2018 Loans Collectively Evaluated for Impairment Loans Individually Evaluated for Impairment General Reserve Allocation Recorded Investment of Loans Ratio Specific Reserve Allocation Recorded Investment of Loans Ratio (In thousands) (In thousands) Single-family residential $ 33,033 $ 5,782,870 0.6 % $ — $ 21,345 — % Construction 31,317 1,060,428 3.0 — 2,427 — Construction - custom 1,842 289,192 0.6 — — — Land - acquisition & development 7,969 122,639 6.5 9 920 1.0 Land - consumer lot loans 2,164 96,583 2.2 — 507 — Multi-family 8,325 1,384,655 0.6 4 448 1.0 Commercial real estate 11,702 1,432,791 0.8 150 19,378 0.8 Commercial & industrial 28,348 1,126,438 2.5 354 14,437 2.5 HELOC 781 128,715 0.6 — 1,162 — Consumer 3,259 173,181 1.9 — 56 — $ 128,740 $ 11,597,492 1.1 % $ 517 $ 60,680 0.9 % The Company has an asset quality review function that analyzes the loan portfolio 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). September 30, 2019 Internally Assigned Grade Total Pass Special mention Substandard Doubtful Loss Gross Loans (In thousands) Loan type Single-family residential $ 5,808,444 $ — $ 26,750 $ — $ — $ 5,835,194 Construction 2,038,052 — — — — 2,038,052 Construction - custom 540,741 — — — — 540,741 Land - acquisition & development 200,283 — 3,824 — — 204,107 Land - consumer lot loans 98,828 — 866 — — 99,694 Multi-family 1,418,837 — 3,837 — — 1,422,674 Commercial real estate 1,602,634 2,754 25,782 — — 1,631,170 Commercial & industrial 1,229,891 18,125 20,679 — — 1,268,695 HELOC 141,271 — 907 — — 142,178 Consumer 129,872 — 11 — — 129,883 Total gross loans $ 13,208,853 $ 20,879 $ 82,656 $ — $ — $ 13,312,388 Total grade as a % of total gross loans 99.2 % 0.2 % 0.6 % — % — % September 30, 2018 Internally Assigned Grade Total Pass Special mention Substandard Doubtful Loss Gross Loans (In thousands) Loan type Single-family residential $ 5,766,096 $ — $ 32,870 $ — $ — $ 5,798,966 Construction 1,886,304 1,937 2,427 — — 1,890,668 Construction - custom 624,479 — — — — 624,479 Land - acquisition & development 152,984 — 2,220 — — 155,204 Land - consumer lot loans 101,249 — 787 — — 102,036 Multi-family 1,378,803 1,633 4,689 — — 1,385,125 Commercial real estate 1,421,602 7,114 23,452 — — 1,452,168 Commercial & industrial 1,093,405 16,513 30,956 — — 1,140,874 HELOC 130,330 — 522 — — 130,852 Consumer 173,285 — 21 — — 173,306 Total gross loans $ 12,728,537 $ 27,197 $ 97,944 $ — $ — $ 12,853,678 Total grade as a % of total gross loans 99.0 % 0.2 % 0.8 % — % — % The following tables provide information on gross loans based on payment activity. September 30, 2019 Performing Loans Non-Performing Loans Amount % of Total Gross Loans Amount % of Total Gross Loans (In thousands) (In thousands) Single-family residential $ 5,809,923 99.6 % $ 25,271 0.4 % Construction 2,038,052 100.0 — — Construction - custom 540,741 100.0 — — Land - acquisition & development 203,938 99.9 169 0.1 Land - consumer lot loans 99,448 99.8 246 0.2 Multi-family 1,422,674 100.0 — — Commercial real estate 1,625,335 99.6 5,835 0.4 Commercial & industrial 1,267,403 99.9 1,292 0.1 HELOC 141,271 99.4 907 0.6 Consumer 129,872 100.0 11 — $ 13,278,657 99.7 % $ 33,731 0.3 % September 30, 2018 Performing Loans Non-Performing Loans Amount % of Total Gross Loans Amount % of Total Gross Loans (In thousands) (In thousands) Single-family residential $ 5,771,323 99.5 % $ 27,643 0.5 % Construction 1,888,241 99.9 2,427 0.1 Construction - custom 624,479 100.0 — — Land - acquisition & development 154,284 99.4 920 0.6 Land - consumer lot loans 101,249 99.2 787 0.8 Multi-family 1,385,125 100.0 — — Commercial real estate 1,443,197 99.4 8,971 0.6 Commercial & industrial 1,126,480 98.7 14,394 1.3 HELOC 130,329 99.6 523 0.4 Consumer 173,285 100.0 21 — $ 12,797,992 99.6 % $ 55,686 0.4 % The following tables provide information on impaired loans by loan category. September 30, 2019 Recorded Investment Unpaid Principal Balance Related Allowance Average Recorded Investment (In thousands) Impaired loans with no related allowance recorded: Single-family residential $ 17,979 $ 19,252 $ — $ 16,685 Construction — — — 1,172 Construction - custom — — — 251 Land - acquisition & development 78 143 — 290 Land - consumer lot loans 344 848 — 287 Multi-family — — — 286 Commercial real estate 7,467 11,881 — 8,890 Commercial & industrial 1,114 5,312 — 7,168 HELOC 837 931 — 597 Consumer 50 119 — 23 27,869 38,486 — 35,649 Impaired loans with an allowance recorded: Single-family residential 112,042 114,609 2,208 125,976 Land - acquisition & development 91 152 — 99 Land - consumer lot loans 3,556 3,695 20 4,324 Multi-family 385 385 4 418 Commercial real estate 4,168 5,298 323 5,160 Commercial & industrial 426 691 92 2,535 HELOC 949 963 — 961 Consumer 60 282 — 65 121,677 126,075 2,647 (1) 139,538 Total: Single-family residential 130,021 133,861 2,208 142,661 Construction — — — 1,172 Construction - custom — — — 251 Land - acquisition & development 169 295 — 389 Land - consumer lot loans 3,900 4,543 20 4,611 Multi-family 385 385 4 704 Commercial real estate 11,635 17,179 323 14,050 Commercial & industrial 1,540 6,003 92 9,703 HELOC 1,786 1,894 — 1,558 Consumer 110 401 — 88 $ 149,546 $ 164,561 $ 2,647 (1) $ 175,187 ____________________ (1) Includes $439,000 of specific reserves and $2,208,000 included in the general reserves. September 30, 2018 Recorded Investment Unpaid Principal Balance Related Allowance Average Recorded Investment (In thousands) Impaired loans with no related allowance recorded: Single-family residential $ 18,872 $ 20,050 $ — $ 20,097 Construction 2,698 2,818 — 1,349 Construction - custom — — — 74 Land - acquisition & development 814 814 — 572 Land - consumer lot loans 311 336 — 260 Multi-family — — — 70 Commercial real estate 9,425 14,035 — 11,158 Commercial & industrial 10,137 10,146 — 9,208 HELOC 410 1,170 — 450 Consumer 20 56 — 54 42,687 49,425 — 43,292 Impaired loans with an allowance recorded: Single-family residential 139,796 143,099 2,871 161,729 Land - acquisition & development 107 157 — 39 Land - consumer lot loans 4,916 5,290 9 6,449 Multi-family 448 448 4 471 Commercial real estate 6,254 7,733 150 10,445 Commercial & industrial 4,291 7,506 354 4,495 HELOC 976 984 — 1,395 Consumer 70 70 — 83 156,858 165,287 3,388 (1) 185,106 Total: Single-family residential 158,668 163,149 2,871 181,826 Construction 2,698 2,818 — 1,349 Construction - custom — — — 74 Land - acquisition & development 921 971 — 611 Land - consumer lot loans 5,227 5,626 9 6,709 Multi-family 448 448 4 541 Commercial real estate 15,679 21,768 150 21,603 Commercial & industrial 14,428 17,652 354 13,703 HELOC 1,386 2,154 — 1,845 Consumer 90 126 — 137 $ 199,545 $ 214,712 $ 3,388 (1) $ 228,398 ____________________ (1) Includes $517,000 of specific reserves and $2,871,000 included in the general reserves.

Fair Value Measurements

Fair Value Measurements	12 Months Ended
	Sep. 30, 2019
Fair Value Disclosures [Abstract]
Fair Value Measurements	FAIR VALUE MEASUREMENTS FASB ASC 820 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. ASC 820 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. The Company has established and documented the process for determining the fair values of its 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 Available-for-sale investment securities and derivative contracts Securities available for sale are recorded at fair value on a recurring basis. The fair value of debt securities are priced using model pricing based on the securities' relationship to other benchmark quoted prices as provided by an independent third party, and under GAAP are considered a Level 2 input method. Securities that are traded on active exchanges, including the Company's equity securities, are measured using the closing price in an active market and are considered a Level 1 input method. The Company offers interest rate swaps to its variable rate borrowers who want to manage their interest rate risk. At the same time, the Company enters into the opposite trade with a counter party to offset its interest rate risk. The Company has also entered various forms of fair value hedges and cash flow hedges using interest rate swaps. The fair value of these interest rate swaps are estimated by a third party pricing service using a discounted cash flow technique. These are considered a Level 2 input method. The following table presents the balance and level in the fair value hierarchy for assets and liabilities that are measured at fair value on a recurring basis. September 30, 2019 Level 1 Level 2 Level 3 Total (In thousands) Available-for-sale securities U.S. government and agency securities $ — $ 270,778 $ — $ 270,778 Municipal bonds — 22,642 — 22,642 Corporate debt securities — 209,763 — 209,763 Mortgage-backed securities Agency pass-through certificates — 982,559 — 982,559 Total Available-for-sale securities — 1,485,742 — 1,485,742 Client swap program hedges — 20,381 — 20,381 Mortgage loan fair value hedges — 1,608 — 1,608 Total Financial Assets $ — $ 1,507,731 $ — $ 1,507,731 Financial Liabilities Client swap program hedges $ — $ 20,381 $ — $ 20,381 Commercial loan fair value hedges — 4,288 — 4,288 Borrowings cash flow hedges — 7,877 — 7,877 Total Financial Liabilities $ — $ 32,546 $ — $ 32,546 There were no transfers between, into and/or out of Levels 1, 2 or 3 during the year ended September 30, 2019 . September 30, 2018 Level 1 Level 2 Level 3 Total (In thousands) Available-for-sale securities Equity securities $ 488 $ — $ — $ 488 U.S. government and agency securities — 207,293 — 207,293 Municipal bonds — 22,978 — 22,978 Corporate debt securities — 184,695 — 184,695 Mortgage-backed securities Agency pass-through certificates — 896,041 — 896,041 Commercial MBS — 3,462 — 3,462 Total Available-for-sale securities 488 1,314,469 — 1,314,957 Client swap program hedges — 12,731 — 12,731 Commercial loan fair value hedges — 3,857 — 3,857 Borrowings cash flow hedges — 22,250 — 22,250 Total Financial Assets $ 488 $ 1,353,307 $ — $ 1,353,795 Financial Liabilities Client swap program hedges $ — $ 12,731 $ — $ 12,731 Total Financial Liabilities $ — $ 12,731 $ — $ 12,731 There were no transfers between, into and/or out of Level 1, 2 or 3 during the year ended September 30, 2018 . Measured on a Nonrecurring Basis Impaired Loans & Real Estate Owned Real estate owned ("REO") consists principally of properties acquired through foreclosure. From time to time, and on a nonrecurring basis, adjustments using fair value measurements are recorded to reflect increases or decreases based on the current appraisal or estimated value of the collateral, but only up to the fair value of the real estate owned as of the initial transfer date less selling costs. When management determines that the fair value of the collateral dependent impaired loans or the real estate owned requires additional adjustments, either as a result of an updated appraised value or when there is no observable market price, the Company classifies the impaired loan or real estate owned as Level 3. Level 3 assets recorded at fair value on a nonrecurring basis represent impaired loans for which a specific reserve is recorded or a partial charge-off was recorded based on the fair value of collateral, as well as real estate owned where the fair value of the property was less than the cost basis. The following table presents the recorded balance of assets that were measured at estimated fair value on a nonrecurring basis for the periods presented, and the total gains (losses) resulting from those fair value adjustments for the periods presented. The estimated fair values are presented gross of estimated selling costs. September 30, 2019 Three Months Ended September 30, 2019 Twelve Months Ended September 30, 2019 Level 1 Level 2 Level 3 Total Total Gains (Losses) (In thousands) Impaired loans (1) $ — $ — $ 6,662 $ 6,662 $ (2,176 ) $ (7,796 ) Real estate owned (2) — — 7,307 7,307 (275 ) 119 Balance at end of period $ — $ — $ 13,969 $ 13,969 $ (2,451 ) $ (7,677 ) (1) The gains (losses) represent remeasurements of collateral-dependent impaired loans. (2) The gains (losses) represent aggregate writedowns and charge-offs on real estate owned. September 30, 2018 Three Months Ended September 30, 2018 Twelve Months Ended September 30, 2018 Level 1 Level 2 Level 3 Total Total Gains (Losses) (In thousands) Impaired loans (1) $ — $ — $ 16,500 $ 16,500 $ (707 ) $ (4,800 ) Real estate owned (2) — — 7,455 7,455 (126 ) (782 ) Balance at end of period $ — $ — $ 23,955 $ 23,955 $ (833 ) $ (5,582 ) (1) The gains (losses) represent remeasurements of collateral-dependent impaired loans. (2) The gains (losses) represent aggregate writedowns and charge-offs on real estate owned. 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 Company's 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 process. Applicable loans that were 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 methods are 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. • The present value of the expected future cash flows of the loans is used for measurement of non collateral-dependent loans to test for impairment. The Company estimates the future cash flows and then discounts those using the contractual interest rate. Real estate owned - When a loan is reclassified from loan status to real estate owned 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 appraisals or third-party price options, which is used to establish the fair value of the underlying collateral. The determined fair value, less selling costs, becomes the carrying value of the REO asset. 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 below, such amounts have not been comprehensively revalued for purposes of these financial statements since the dates shown, and therefore, estimates of fair value subsequent to those dates may differ significantly from the amounts presented below. September 30, 2019 September 30, 2018 Level Carrying Amount Estimated Fair Value Carrying Amount Estimated Fair Value (In thousands) Financial assets Cash and cash equivalents 1 $ 419,158 $ 419,158 $ 268,650 $ 268,650 Available-for-sale securities: Equity securities 1 — — 488 488 U.S. government and agency securities 2 270,778 270,778 207,293 207,293 Municipal bonds 2 22,642 22,642 22,978 22,978 Corporate debt securities 2 209,763 209,763 184,695 184,695 Mortgage-backed securities Agency pass-through certificates 2 982,559 982,559 896,041 896,041 Commercial MBS 2 — — 3,462 3,462 Total available-for-sale securities 1,485,742 1,485,742 1,314,957 1,314,957 Held-to-maturity securities: Mortgage-backed securities Agency pass-through certificates 2 1,428,480 1,448,088 1,610,420 1,533,742 Commercial MBS 15,000 15,007 15,000 15,028 Total held-to-maturity securities 1,443,480 1,463,095 1,625,420 1,548,770 Loans receivable 3 11,930,575 12,617,600 11,477,081 11,556,326 FHLB and FRB stock 2 123,990 123,990 127,190 127,190 Other assets - client swap program hedges 2 20,381 20,381 12,731 12,731 Other assets - commercial loan fair value hedges 2 — — 3,857 3,857 Other assets - mortgage loan fair value hedges 2 1,608 1,608 — — Other assets - borrowings cash flow hedges 2 — — 22,250 22,250 Financial liabilities Time deposits 2 4,906,963 4,937,847 4,804,803 4,779,040 FHLB advances and other borrowings 2 2,250,000 2,282,887 2,330,000 2,316,964 Other liabilities - client swap program hedges 2 20,381 20,381 12,731 12,731 Other liabilities - commercial loan fair value hedges 2 4,288 4,288 — — Other liabilities - borrowings cash flow hedges 2 7,877 7,877 — — 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 primarily priced using model pricing based on the securities' relationship to other benchmark quoted prices as provided by an independent third party, and are considered a Level 2 input method. Equity securities which are exchange traded are considered a Level 1 input method. Loans receivable – Fair values are estimated first by stratifying the portfolios of loans with similar financial characteristics. Loans are segregated by type such as multi-family real estate, residential mortgage, construction, commercial, consumer and land loans. Each loan category is further segmented into fixed- and adjustable-rate interest terms. For residential mortgages and multi-family loans, the bank determined that its best exit price was by securitization. MBS benchmark prices are used as a base price, with further loan level pricing adjustments made based on individual loan characteristics such as FICO score, LTV, Property Type and occupancy. For all other loan categories an estimate of fair value is then calculated based on discounted cash flows using a discount rate offered and observed in the market on similar products, plus an adjustment for liquidity to reflect the non-homogeneous nature of the loans, as well as an annual loss rate based on historical losses to arrive at an estimated exit price fair value. Fair value for impaired loans is also based on recent appraisals or estimated cash flows discounted using rates commensurate with risk associated with the estimated cash flows. Assumptions regarding credit risk, cash flows and discount rates are judgmentally determined using available market information and specific borrower information. FHLB and FRB stock – The fair value is based upon the par value of the stock which equates to its carrying value. Time deposits – The fair value of fixed-maturity time deposits is estimated by discounting the estimated future cash flows using the rates currently offered for deposits with similar remaining maturities. FHLB advances – 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. Interest rate swaps

Derivatives and Hedging Activit

Derivatives and Hedging Activities	12 Months Ended
	Sep. 30, 2019
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Derivatives and Hedging Activities	DERIVATIVES AND HEDGING ACTIVITIES On October 1, 2018, the Company early adopted ASU 2017-12, Targeted Improvements to Accounting for Hedge Activities . This standard primarily impacts the accounting for derivatives designated as fair value and cash flow accounting hedges. The following tables present the fair value, notional amount and balance sheet classification of derivative assets and liabilities at September 30, 2019 and September 30, 2018 . September 30, 2019 Derivative Assets Derivative Liabilities Balance Sheet Location Notional Fair Value Balance Sheet Location Notional Fair Value (In thousands) (In thousands) Client swap program hedges Other assets $ 425,607 $ 20,381 Other liabilities $ 425,607 $ 20,381 Commercial loan fair value hedges Other assets — — Other liabilities 95,645 4,288 Mortgage loan fair value hedges Other assets 200,000 1,608 Other liabilities — — Borrowings cash flow hedges Other assets — — Other liabilities 700,000 7,877 $ 625,607 $ 21,989 $ 1,221,252 $ 32,546 September 30, 2018 Derivative Assets Derivative Liabilities Interest rate contract purpose Balance Sheet Location Notional Fair Value Balance Sheet Location Notional Fair Value (In thousands) (In thousands) Client swap program hedges Other assets $ 395,396 $ 12,731 Other liabilities $ 395,396 $ 12,731 Commercial loan fair value hedges Other assets 97,927 3,857 Other liabilities — — Borrowings cash flow hedges Other assets 700,000 22,250 Other liabilities — — $ 1,193,323 $ 38,838 $ 395,396 $ 12,731 The Company enters into interest rate swaps to hedge interest rate risk. These arrangements include hedges of individual fixed rate commercial loans and also hedges of a specified portion of pools of prepayable fixed rate mortgage loans under the "last of layer" method. These relationships qualify as fair value hedges under FASB ASC 815, Derivatives and Hedging (" ASC 815"), which provides for offsetting of the recognition of gains and losses of the respective interest rate swap and the hedged items. Gains and losses on interest rate swaps designated in these hedge relationships, along with the offsetting gains and losses on the hedged items attributable to the hedged risk, are recognized in current earnings within the same income statement line item. Upon electing to apply ASC 815 fair value hedge accounting, the carrying value of the hedged items are adjusted to reflect the cumulative impact of changes in fair value attributable to the hedged risk. The hedge basis adjustment remains with each hedged item until the hedged item is de-recognized from the balance sheet. The following table presents the impact of fair value hedge accounting on the carrying value of the hedged items at September 30, 2019 . (In thousands) September 30, 2019 Balance sheet line item in which hedged item is recorded Carrying value of hedged items Cumulative gain (loss) fair value hedge adjustment included in carrying amount of hedged items Loans receivable (1) (2) $ 1,612,208 $ (2,680 ) $ 1,612,208 $ (2,680 ) (1) Includes the amortized cost basis of the closed mortgage loan portfolios used to designate the hedging relationships in which the hedged items are the last layer expected to be remaining at the end of the hedging relationships. At September 30, 2019 , the amortized cost basis of the closed loan portfolios used in the hedging relationships was $1,520,647,000 , the cumulative basis adjustment associated with the hedging relationships was $1,608,000 , and the amount of the designated hedged items was $200,000,000 . (2) Includes the amortized cost basis of commercial loans designated in fair value hedging relationships. At September 30, 2019 , the amortized cost basis of the hedged commercial loans was $91,561,000 and the cumulative basis adjustment associated with the hedging relationships was $(4,288,000) . The Company has entered into interest rate swaps to convert certain short-term borrowings to fixed rate payments. The primary purpose of these hedges is to mitigate the risk of changes in future cash flows resulting from increasing interest rates. For qualifying cash flow hedges under ASC 815, gains and losses on the interest rate swaps are recorded in accumulated other comprehensive income ("AOCI") and then reclassified into earnings in the same period the hedged cash flows affect earnings and within the same income statement line item as the hedged cash flows. As of September 30, 2019 , the maturities for hedges of adjustable rate borrowings ranged from less than one year to seven years , with the weighted average being 2.6 years. The following table presents the impact of derivative instruments (cash flow hedges on borrowings) on AOCI for the periods presented. (In thousands) Twelve Months Ended September 30, Amount of gain/(loss) recognized in AOCI on derivatives in cash flow hedging relationships 2019 Interest rate contracts: Pay fixed/receive floating swaps on cash flow hedges of borrowings $ (28,519 ) Total pre-tax gain/(loss) recognized in AOCI $ (28,519 ) The following table presents the gains/(losses) on derivative instruments in fair value and cash flow accounting hedging relationships under ASC 815 for the period presented. Twelve Months Ended September 30, 2019 Interest income on loans receivable Interest expense on FHLB advances (In thousands) Interest income/(expense), including the effects of fair value and cash flow hedges $ 568,096 $ (68,190 ) Gain/(loss) on fair value hedging relationships: Interest rate contracts Amounts related to interest settlements on derivatives $ 128 Recognized on derivatives (6,504 ) Recognized on hedged items 6,479 Net income/(expense) recognized on fair value hedges $ 103 Gain/(loss) on cash flow hedging relationships: Interest rate contracts Amounts related to interest settlements on derivatives $ (2,823 ) Amount of derivative gain/(loss) reclassified from AOCI into interest income/expense — Net income/(expense) recognized on cash flow hedges $ (2,823 ) The Company periodically enters into certain interest rate swap agreements in order to provide commercial loan customers the ability to convert from variable to fixed interest rate payments, while the Company retains a variable rate loan. Under these agreements, the Company enters into a variable rate loan agreement and a swap agreement with the client. The swap agreement effectively converts the client’s variable rate loan into a fixed rate. The Company enters into a corresponding swap agreement with a third party in order to offset its exposure on the variable and fixed components of the client's swap agreement. The interest rate swaps are derivatives under ASC 815, with changes in fair value recorded in earnings. There was no net impact to the statement of operations for the years ended September 30, 2019 and 2018 as the changes in fair value of the receive fixed swap and pay fixed swap offset each other. The following table presents the impact of derivative instruments (client swap program) that are not designated in accounting hedges under ASC 815 for the periods presented. (In thousands) Twelve Months Ended September 30, Derivative instruments Classification of gain/(loss) recognized in income on derivative instrument 2019 Interest rate contracts: Pay fixed/receive floating swap Other noninterest income $ (33,112 ) Receive fixed/pay floating swap Other noninterest income 33,112 $ —

Revenue from Contracts with Cus

Revenue from Contracts with Customers	12 Months Ended
	Sep. 30, 2018
Revenue from Contract with Customer [Abstract]
Revenue from Contracts with Customers	Revenue from Contracts with Customers On October 1, 2018, the Company adopted ASU No. 2014-09, Revenue from Contracts with Customers ("ASC 606") . Since net interest income on financial assets and liabilities is excluded from this guidance, a significant majority of our revenues are not subject to the new guidance. Revenue streams that are within the scope of the new guidance are presented within noninterest income and are, in general, recognized as revenue at the same time the Company's obligation to the customer is satisfied. Most of the Company's customer contracts that are within the scope of the new guidance are cancelable by either party without penalty and are short-term in nature. These sources of revenue include depositor and other consumer and business banking fees, commission income, as well as debit and credit card interchange fees. For the year ended 2019 , in scope revenue streams represented approximately 5.0% of our total revenues. As this standard is immaterial to our consolidated financial statements, the Company has omitted certain disclosures in ASC 606, including the disaggregation of revenue table. Sources of noninterest income within the scope of the new guidance include the following: Deposit related and other service charges (recognized in Deposit Fee Income) : The Company's deposit accounts are governed by standardized contracts customary in the industry. Revenues are earned at a point in time or over time (monthly) from account maintenance fees and charges for specific transactions such as wire transfers, stop payment orders, overdrafts, debit card replacements, check orders and cashier’s checks. The Company’s performance obligation related to each of these fees is generally satisfied, and the related revenue recognized, at the time the service is provided (point in time or monthly). The Company is principal in each of these contracts. Debit and credit card interchange fees (recognized in Deposit Fee Income) : The Company receives interchange fees from the debit card and credit card payment networks based on transactions involving debit or credit cards issued by the Company, generally measured as a percentage of the underlying transaction. Interchange fees from debit and credit card transactions are recognized as the transaction processing services are provided by the network. The Company acts as an agent in the card payment network arrangement so the interchange fees are recorded net of any expenses paid to the principal (the card payment networks in this case). Insurance agency commissions (recognized in Other Income)

Interest Receivable

Interest Receivable	12 Months Ended
	Sep. 30, 2019
Receivables [Abstract]
Interest Receivable	INTEREST RECEIVABLE The following table provides a summary of interest receivable by interest earning asset type. September 30, 2019 September 30, 2018 (In thousands) Loans receivable $ 41,429 $ 39,176 Mortgage-backed securities 6,107 6,404 Investment securities 1,321 1,715 $ 48,857 $ 47,295

Premises and Equipment

Premises and Equipment	12 Months Ended
	Sep. 30, 2019
Property, Plant and Equipment [Abstract]
Premises and Equipment	PREMISES AND EQUIPMENT The following table provides a summary of premises and equipment by asset type. September 30, 2019 September 30, 2018 Estimated Useful Life (In thousands) Land — $ 117,431 $ 110,251 Buildings 25 - 40 165,088 156,803 Leasehold improvements 7 - 15 22,765 22,887 Furniture, software and equipment 2 - 10 138,553 126,979 443,837 416,920 Less accumulated depreciation and amortization (169,822 ) (148,925 ) $ 274,015 $ 267,995 The Company has non-cancelable operating leases for certain branch offices. Future minimum net rental commitments for all non-cancelable leases, including maintenance and associated costs, are as follows: $5,838,000 for 2020 , $5,246,000 for 2021 , $4,698,000 for 2022 , $4,302,000 for 2023 , $3,596,000 for 2024 and $10,531,000 thereafter. Rental expense, including amounts paid under month-to-month cancelable leases, amounted to $6,455,000 , $6,477,000 and $5,500,000 in 2019 , 2018 , and 2017 , respectively.

Customer Accounts

Customer Accounts	12 Months Ended
	Sep. 30, 2019
Banking and Thrift [Abstract]
Customer Accounts	CUSTOMER ACCOUNTS The following tables provide the composition of the Company's customer accounts, including time deposits. September 30, 2019 September 30, 2018 Deposit Account Balance As a % of Total Deposits Weighted Deposit Account Balance As a % of Total Deposits Weighted ($ in thousands) Non-interest checking $ 1,621,343 13.5 % — % $ 1,401,226 12.4 % — % Interest checking 1,984,576 16.6 0.61 1,778,520 15.6 0.50 Savings 753,574 6.3 0.13 836,501 7.3 0.11 Money market 2,724,308 22.7 0.82 2,566,096 22.5 0.65 Time deposits 4,906,963 40.9 1.91 4,804,803 42.2 1.50 Total $ 11,990,764 100 % 1.08 % $ 11,387,146 100 % 0.87 % Time deposits by rate band are as follows: September 30, 2019 September 30, 2018 (In thousands) Time deposit accounts Less than 1.00% $ 21,281 $ 629,589 1.00% to 1.99% 3,588,689 3,761,543 2.00% to 2.99% 1,294,889 413,671 3.00% to 3.99% 2,104 — Total time deposits $ 4,906,963 $ 4,804,803 Time deposits by maturity band are as follows: September 30, 2019 September 30, 2018 (In thousands) Within 1 year $ 3,489,839 $ 2,800,978 1 to 2 years 925,170 1,335,242 2 to 3 years 294,990 296,238 Over 3 years 196,964 372,345 $ 4,906,963 $ 4,804,803 Customer accounts over $250,000 totaled $3,609,961,000 as of September 30, 2019 , and $3,088,231,000 as of September 30, 2018 . Interest expense on customer accounts consisted of the following: Year ended September 30, 2019 2018 2017 (In thousands) Checking accounts $ 12,499 $ 6,072 $ 2,721 Savings accounts 980 920 978 Money market accounts 21,967 7,788 3,592 Time deposit accounts 87,665 58,468 45,256 123,111 73,248 52,547 Less early withdrawal penalties (895 ) (756 ) (524 ) $ 122,216 $ 72,492 $ 52,023 Weighted average interest rate at end of year 1.08 % 0.87 % 0.54 % Weighted daily average interest rate during the year 1.05 % 0.65 % 0.49 %

FHLB Advances and Other Borrowi

FHLB Advances and Other Borrowings	12 Months Ended
	Sep. 30, 2019
Federal Home Loan Banks [Abstract]
FHLB Advances and Other Borrowings	FHLB ADVANCES AND OTHER BORROWINGS The table below shows the maturity dates of outstanding FHLB advances. September 30, 2019 September 30, 2018 (In thousands) FHLB advances Within 1 year $ 950,000 $ 1,680,000 1 to 3 years 750,000 300,000 3 to 5 years 400,000 200,000 More than 5 years 150,000 150,000 $ 2,250,000 $ 2,330,000 As of September 30, 2019 , there is $100,000,000 of FHLB advances that are callable as of August 7, 2020 and quarterly thereafter. Financial information pertaining to the weighted-average cost and the amount of FHLB advances were as follows. 2019 2018 2017 (In thousands) Weighted average interest rate, including cash flow hedges, at end of year 2.49 % 2.66 % 2.80 % Weighted daily average interest rate, including cash flow hedges, during the year 2.69 % 2.62 % 3.00 % Daily average of FHLB advances during the year $ 2,533,890 $ 2,384,795 $ 2,167,986 Maximum amount of FHLB advances at any month end $ 2,665,000 $ 2,620,000 $ 2,350,000 Interest expense during the year (including swap interest income and expense) $ 68,190 $ 62,452 $ 64,969 The Bank has a credit line with the Federal Home Loan Bank of Des Moines ("FHLB") equal to 45% of total assets, subject to collateral requirements.

Income Taxes

Income Taxes	12 Months Ended
	Sep. 30, 2019
Income Tax Disclosure [Abstract]
Income Taxes	INCOME TAXES On December 22, 2017, the U.S. Government enacted significant new tax legislation that reduces the corporate federal income tax rate from a maximum of 35% to a flat 21% rate. The corporate tax rate reduction was effective January 1, 2018. Because the Company has a fiscal year end of September 30, the reduced corporate tax rate resulted in the application of a blended federal statutory tax rate of 24.53% for its fiscal year 2018 and then 21% thereafter. Under generally accepted accounting principles, the Company uses the asset and liability method of accounting for income taxes. Under this method, deferred tax assets and liabilities are recognized for the future tax consequences attributable to differences between the financial statement carrying amounts of existing assets and liabilities and their respective tax bases. Deferred tax assets and liabilities are measured using enacted tax rates expected to apply to taxable income in the years in which those temporary differences are expected to be recovered or settled. The table below provides a summary of the Company's tax assets and liabilities, including deferred tax assets and deferred tax liabilities by major source. Deferred tax balances represent temporary differences between the financial statement and corresponding tax treatment of income, gains, losses, deductions or credits. September 30, 2019 September 30, 2018 (In thousands) Deferred tax assets Loan loss reserves $ 31,494 $ 31,055 REO reserves 255 518 Non-accrual loan interest 891 877 Federal and state tax credits 537 1,074 Deferred compensation 3,022 3,165 Stock based compensation 1,876 1,677 Other 2,081 1,747 Total deferred tax assets 40,156 40,113 Deferred tax liabilities FHLB stock dividends 14,478 14,941 Valuation adjustment on available-for-sale securities and cash flow hedges 4,503 2,442 Loan origination fees and costs 8,385 9,285 Premises and equipment 25,399 23,429 Other 2,851 1,828 Total deferred tax liabilities 55,616 51,925 Net deferred tax asset (liability) (15,460 ) (11,812 ) Current tax asset (liability) 10,356 13,616 Net tax asset (liability) $ (5,104 ) $ 1,804 The table below presents a reconciliation of the statutory federal income tax rate to the Company's effective income tax rate. Year ended September 30, 2019 2018 2017 Statutory income tax rate 21 % 25 % 35 % State income tax 2 2 1 Impact of change in Federal income tax rate — (2 ) — Other differences (3 ) (4 ) (4 ) Effective income tax rate 20 % 21 % 32 % The following table summarizes the Company's income tax expense (benefit) for the respective periods. Year ended September 30, 2019 2018 2017 (In thousands) Federal: Current $ 46,376 $ 40,314 $ 87,804 Deferred 1,916 8,952 (10,142 ) 48,292 49,266 77,662 State: Current $ 4,557 $ 4,243 $ 4,991 Deferred (330 ) (116 ) 31 4,227 4,127 5,022 Total Current 50,933 44,557 92,795 Deferred 1,586 8,836 (10,111 ) $ 52,519 $ 53,393 $ 82,684 Based on current information, the Company does not expect that changes in the amount of unrecognized tax benefits over the next 12 months will have a significant impact on its results of operations or financial position. The Company's liability for uncertain tax positions was $0 as of September 30, 2019 , and $2,679,000 as of September 30, 2018 . The reduction in liability for uncertain tax positions is due to the resolution of a previously unrecognized tax benefit. Changes in amounts of uncertain tax positions affect the Company's effective tax rate. The Company records interest and penalties (if applicable) related to uncertain tax positions in income tax expense. The Company's federal income tax returns are open and subject to potential examination by the IRS for fiscal years 2016 and later. The Company currently has some tax refund claims for earlier years pending before and subject to examination by the IRS, but such examination is only limited to the refund claims and does not cover other matters on the corresponding returns, which are beyond the statutory period of limitation for general IRS audit. 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

401(k) Plan

401(k) Plan	12 Months Ended
	Sep. 30, 2019
Retirement Benefits [Abstract]
401(k) Plan	401(k) PLAN The Company maintains a 401(k) Plan (the "Plan") for the benefit of its employees. Company contributions are made 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 $55,000 . Prior to January 1, 2018, new employees were eligible to participate in the Plan upon completion of one year of service. A “year of service” was defined as a 12-month period in which the eligible employee worked at least 1,000 hours of service and the first eligibility service period started on the first day of employment. Effective January 1, 2018, new employees become eligible to participate in the Plan and make employee contributions after completing one month of service. The Plan provides for a guaranteed safe harbor matching contribution equal to 100% of the first 4% of compensation that employees contribute to their account and this amount is immediately vested. The safe harbor match is not subject to the six year vesting schedule of the profit sharing contribution. This provides plan participants more investment flexibility. The Company anticipates that all eligible employees, regardless of personal plan participation, will continue to receive an annual discretionary profit sharing contribution from the Company, now capped at 7% of eligible compensation with this change. Effective February 1, 2019, the Plan's third-party administrator was transitioned from The Newport Group to Fidelity Investments. This transition resulted in a change in plan name from Washington Federal 401(k) and Employee Stock Ownership Plan and Trust to Washington Federal 401(k) Plan. As part of this transition, the Plan now provides participants a Roth deferral option and in-plan conversion of participant's existing Roth accounts and eliminates the Plan's ESOP component. Company contributions to the Plan amounted to $6,920,000 , $5,910,000 and $6,433,000 for the years ended 2019 , 2018 and 2017 , respectively.

Stock Award Plans

Stock Award Plans	12 Months Ended
	Sep. 30, 2019
Share-based Payment Arrangement [Abstract]
Stock Award Plans	STOCK AWARD PLANS The Company's stock based compensation plan ("2011 Incentive Plan") provides for grants of stock options and restricted stock. Shareholders authorized 5,000,000 shares of common stock to be reserved pursuant to the 2011 Incentive Plan and 2,856,502 shares remain available for issuance as of September 30, 2019 . When applicable, stock options 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 three to five 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 stock options granted is estimated on the date of grant using the Black-Scholes option-pricing model. 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. Stock Option Awards: There were 356,343 stock options granted under the 2011 Incentive Plan during 2019 and no stock options granted in 2018 and 2017 . A summary of stock option activity and changes during the year are as follows. Options Shares Weighted Weighted Aggregate Outstanding at September 30, 2018 51,060 $ 15.25 2 $855 Granted 356,343 28.16 Exercised (22,975 ) 12.99 Forfeited (64,141 ) 27.96 Outstanding at September 30, 2019 320,287 $ 27.21 8 $ 3,136 Exercisable at at September 30, 2019 27,620 $ 17.17 1.4 $ 547 The table below presents other information regarding stock options. Year ended September 30, 2019 2018 2017 (In thousands, except grant date fair value per stock option) Compensation cost for stock options $ 521 $ — $ — Weighted average grant date fair value per stock option 5.21 3.15 3.06 Total intrinsic value of options exercised 414 908 2,605 Grant date fair value of options exercised 51 285 1,328 Cash received from option exercises 298 1,338 7,238 The following is a summary of activity related to unvested stock options. Year ended September 30, 2019 2018 2017 Non-vested Stock Options Options Outstanding Weighted Options Outstanding Weighted Options Outstanding Weighted Outstanding at beginning of period — $ — — $ — — $ — Granted 356,343 5.33 — — — — Vested — — — — — — Forfeited (63,176 ) 5.33 — — — — Outstanding at end of period 293,167 $ 5.33 — $ — — $ — As of September 30, 2019 , there was $1,042,000 of unrecognized compensation cost related to stock options. Restricted Stock Awards: The Company grants shares of restricted stock pursuant to the 2011 Incentive Plan. The restricted stock grants are subject to a service condition and vest over a period of one to seven years . Certain grants of restricted stock to executive officers are also subject to additional market and performance conditions based upon meeting certain total shareholder return targets pre-established by the Board. The Company had a total of 435,838 shares of restricted stock outstanding as of September 30, 2019 , with a total grant date fair value of $10,342,436 . The following table summarizes information about unvested restricted stock activity. Year ended September 30, 2019 2018 2017 Non-vested Restricted Stock Outstanding Weighted Outstanding Weighted Outstanding Weighted Outstanding at beginning of period 460,999 $ 22.52 466,681 $ 18.56 490,363 $ 16.00 Granted 249,272 21.41 205,100 $ 26.11 238,450 18.89 Vested (159,103 ) 26.09 (198,620 ) 16.65 (116,878 ) 20.95 Forfeited (115,330 ) 10.61 (12,162 ) 27.00 (145,254 ) 8.56 Outstanding at end of period 435,838 $ 23.73 460,999 $ 22.52 466,681 $ 18.56 Compensation expense related to restricted stock awards was $4,188,000 , $4,259,000 , and $3,659,000 for the years ended 2019 , 2018 and 2017 , respectively.

Shareholders' Equity

Shareholders' Equity	12 Months Ended
	Sep. 30, 2019
Equity [Abstract]
Shareholders' Equity	SHAREHOLDERS' 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 Common Equity Tier 1, Tier 1 and Total 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, 2019 , and 2018 , 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 Common Equity Tier 1, Tier 1 risk-based, Total 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 Capital Ratio Ratio Ratio September 30, 2019 (In thousands) Common Equity Tier 1 risk-based capital ratio: The Company $ 1,710,147 14.30 % 4.50 % NA The Bank 1,666,426 13.93 4.50 6.50 % Tier 1 risk-based capital ratio: The Company 1,710,147 14.30 6.00 NA The Bank 1,666,426 13.93 6.00 8.00 Total risk-based capital ratio: The Company 1,848,581 15.45 8.00 NA The Bank 1,804,860 15.09 8.00 10.00 Tier 1 leverage ratio: The Company 1,710,147 10.51 4.00 NA The Bank 1,666,426 10.24 4.00 5.00 September 30, 2018 Common Equity Tier 1 risk-based capital ratio: The Company $ 1,678,475 14.71 % 4.50 % NA The Bank 1,661,628 14.55 4.50 6.50 % Tier 1 risk-based capital ratio: The Company 1,678,475 14.71 6.00 NA The Bank 1,661,628 14.55 6.00 8.00 Total risk-based capital ratio: The Company 1,814,981 15.91 8.00 NA The Bank 1,798,135 15.75 8.00 10.00 Tier 1 leverage ratio: The Company 1,678,475 10.85 4.00 NA The Bank 1,661,628 10.74 4.00 5.00 At periodic intervals, the Federal Reserve, the OCC and the 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 Company and the Bank are subject to regulatory restrictions on paying dividends. The Company has an ongoing share repurchase program and 4,065,837 shares were repurchased during 2019 at a weighted average price of $30.46 . In 2018 , 4,868,357 shares were repurchased at a weighted average price of $33.74 . As of September 30, 2019 , management had authorization from the Board of Directors to repurchase up to 7,966,761 additional shares. In connection with the 2008 Troubled Asset Relief Program ("TARP"), the Company issued 1,707,456 warrants to purchase common stock at an exercise price of $17.36 . In 2019 , the Company exchanged 102,936 of these warrants with a value of $1,081,704 . No such warrants remain outstanding as of September 30, 2019 . Outstanding warrants were considered in the calculation of diluted shares outstanding using the treasury stock method. The following table sets forth information regarding earnings per share calculations. Year ended September 30, 2019 2018 2017 Weighted average shares outstanding 80,471,316 85,008,040 88,905,457 Weighted average dilutive warrants 4,448 63,079 242,979 Weighted average dilutive options 19,399 38,724 75,771 Weighted average diluted shares 80,495,163 85,109,843 89,224,207 Net income (In thousands) $ 210,256 $ 203,850 $ 173,532 Basic EPS $ 2.61 $ 2.40 $ 1.95 Diluted EPS 2.61 2.40 1.94

Financial Information - Washing

Financial Information - Washington Federal, Inc.	12 Months Ended
	Sep. 30, 2019
Condensed Financial Information 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. Condensed Statements of Financial Condition September 30, 2019 September 30, 2018 (In thousands) Assets Cash $ 38,721 $ 20,334 Other assets 5,000 — Investment in subsidiary 1,989,274 1,980,062 Total assets $ 2,032,995 $ 2,000,396 Liabilities Other liabilities $ — $ 3,488 Total liabilities — 3,488 Shareholders’ equity Total shareholders’ equity 2,032,995 1,996,908 Total liabilities and shareholders’ equity $ 2,032,995 $ 2,000,396 Condensed Statements of Operations Twelve Months Ended September 30, 2019 2018 2017 (In thousands) Income Dividends from subsidiary $ 208,389 $ 198,294 $ 171,500 Total Income 208,389 198,294 171,500 Expense Miscellaneous expense 448 439 435 Total expense 448 439 435 Net income (loss) before equity in undistributed net income (loss) of subsidiary 207,941 197,855 171,065 Equity in undistributed net income (loss) of subsidiaries 2,213 5,880 2,326 Income before income taxes 210,154 203,735 173,391 Income tax benefit (expense) 102 115 141 Net income $ 210,256 $ 203,850 $ 173,532 Condensed Statements of Cash Flows Twelve Months Ended September 30, 2019 2018 2017 (In thousands) Cash Flows From Operating Activities Net income $ 210,256 $ 203,850 $ 173,532 Adjustments to reconcile net income to net cash provided by operating activities: Equity in undistributed net income (loss) of subsidiaries (2,213 ) (5,880 ) (2,326 ) Stock based compensation expense 5,265 4,771 5,910 Decrease (increase) in other assets — — 15 Increase (decrease) in other liabilities (3,489 ) 3,424 (2,699 ) Net cash provided by (used in) operating activities 209,819 206,165 174,432 Cash Flows From Investing Activities Purchase of strategic investments (5,000 ) — — Net cash provided by (used in) investing activities (5,000 ) — — Cash Flows From Financing Activities Proceeds from exercise of common stock options and related tax benefit 740 1,338 7,238 Treasury stock purchased (123,854 ) (164,249 ) (98,374 ) Dividends paid on common stock (63,318 ) (55,997 ) (74,519 ) Net cash provided by (used in) financing activities (186,432 ) (218,908 ) (165,655 ) Increase (decrease) in cash 18,387 (12,743 ) 8,777 Cash at beginning of year 20,334 33,077 24,300 Cash at end of year $ 38,721 $ 20,334 $ 33,077

Selected Quarterly Financial Da

Selected Quarterly Financial Data (Unaudited)	12 Months Ended
	Sep. 30, 2019
Quarterly Financial Information Disclosure [Abstract]
Selected Quarterly Financial Data (Unaudited)	SELECTED QUARTERLY FINANCIAL DATA (UNAUDITED) The following is a summary of the unaudited interim results of operations by quarter for the years presented. Twelve Months Ended September 30, 2019 First Quarter Second Quarter Third Quarter Fourth Quarter (In thousands, except per share data) Interest income $ 162,622 $ 167,582 $ 171,826 $ 169,436 Interest expense 43,470 47,512 50,160 49,264 Net interest income 119,152 120,070 121,666 120,172 Provision (release) for loan losses (500 ) 750 — (1,900 ) Other operating income (including REO gain (loss), net) 19,329 13,618 14,395 15,786 Other operating expense 71,672 67,967 70,898 72,526 Income before income taxes 67,309 64,971 65,163 65,332 Income tax expense 14,367 13,873 11,309 12,970 Net income $ 52,942 $ 51,098 $ 53,854 $ 52,362 Basic earnings per share $ 0.65 $ 0.63 $ 0.67 $ 0.66 Diluted earnings per share 0.65 0.63 0.67 0.66 Cash dividends paid per share 0.18 0.20 0.20 0.21 Twelve Months Ended September 30, 2018 First Quarter Second Quarter Third Quarter Fourth Quarter (In thousands, except per share data) Interest income $ 145,780 $ 149,079 $ 155,072 $ 157,152 Interest expense 30,045 31,778 35,220 37,901 Net interest income 115,735 117,301 119,852 119,251 Provision (release) for loan losses — (950 ) 1,000 (5,500 ) Other operating income (including REO gain (loss), net) 6,841 12,309 12,619 12,207 Other operating expense 61,941 65,787 66,977 69,617 Income before income taxes 60,635 64,773 64,494 67,341 Income tax expense 8,965 15,502 13,100 15,826 Net income $ 51,670 $ 49,271 $ 51,394 $ 51,515 Basic earnings per share $ 0.59 $ 0.58 $ 0.61 $ 0.62 Diluted earnings per share 0.59 0.57 0.61 0.62 Cash dividends paid per share 0.15 0.17 0.17 0.18

Summary of Significant Accoun_2

Summary of Significant Accounting Policies (Policies)	12 Months Ended
	Sep. 30, 2019
Accounting Policies [Abstract]
Fiscal period	The Company's fiscal year end is September 30. All references to 2019 , 2018 and 2017 represent balances as of September 30, 2019 , September 30, 2018 , and September 30, 2017 , or activity for the fiscal years then ended.
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.
Equity securities	Equity securities - The Company records equity securities within Other assets in its Consolidated Statements of Financial Condition. Investments in equity securities with readily determinable fair values (marketable) are measured at fair value, with changes in the fair value recognized as a component of Other income in the Consolidated Statements of Operations. Investments in equity investments that do not have readily determinable fair values (non-marketable) are accounted for at cost minus impairment, if any, plus or minus changes resulting from observable price changes in orderly transactions for the identical or similar investment of the same issuer, also referred to as the measurement alternative. Any adjustments to the carrying value of these investments are recorded in Other income in the Consolidated Statements of Operations.
Debt securities, including mortgage-backed securities	Debt securities, including mortgage-backed securities. The Company accounts for debt securities in two categories: held-to-maturity and available-for-sale. Premiums and discounts on debt securities are deferred and recognized into income over the contractual life of the asset using the effective interest method. 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 accounted for at fair value. 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 net of the related tax effect in the accumulated other comprehensive income component of shareholders' equity. Realized gains and losses on securities sold as well as other-than-temporary impairment charges, if any, are shown on the Consolidated Statements of Operations under the Other income heading. Management evaluates debt securities for other-than- temporary impairment on a quarterly basis based on the securities' current credit quality, market interest rates, term to maturity and management's intent to sell the securities.
Off-balance-sheet credit exposures	The Company estimates losses on off-balance-sheet credit exposures by allocating a loss percentage derived from historical loss factors for each asset class.
Loans receivable, restructured loans, non-accrual loans, impaired loans, and allowance for loan losses	Loans receivable. Loans that are performing in accordance with their contractual terms are carried at the unpaid principal balance, net of premiums, discounts and net deferred loan fees. Net deferred loan fees include nonrefundable loan origination fees less direct loan origination costs. Net deferred loan fees, premiums and discounts are amortized into interest income using either the interest method or straight-line method over the terms of the loans, adjusted for actual prepayments. In addition to fees and costs for originating loans, various other fees and charges related to existing loans may occur, including prepayment charges, late charges and assumption fees. When a borrower fails to make a required payment on a loan, the Bank 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 Bank 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 Bank. Restructured loans. The Bank 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 Bank 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 100 to 200 bps for a specific term, usually six to 12 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, the borrower’s ability to repay is evaluated, including: current income levels and debt to income ratio, borrower’s credit score, payment history of the loan and updated evaluation of the secondary repayment source. The Bank 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. Non-accrual loans. 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 Bank 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 Bank 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 is not expected to 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 management concludes that full repayment is probable based on internal evaluation, it will remain on accrual status following restructuring. If the restructured consumer loan does not perform, it is placed on 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, management will conclude that collection of the entire principal and interest due is still in doubt. In those instances, the loan will remain on non-accrual status. Impaired loans. Impaired loans consist of loans receivable that are not expected to have their principal and interest repaid in accordance with their contractual terms. 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. Allowance for loan losses. The Bank 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 Bank's general methodology for assessing the appropriateness of the allowance is to apply 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 Bank 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 deplete 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 QLFs 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 Bank has also established a reserve for unfunded commitments. The recovery of the carrying value of loans is susceptible to future market conditions beyond the Bank's control, which may result in losses or recoveries differing from those estimated.
Client derivatives, borrowing hedges, last-of-layer loan portfolio hedges, and commercial loan hedges	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 Bank 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 accounting hedges under FASB 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 fee income earned on the swaps that is included in loan fee income. Borrowing hedges. The Company has entered into interest rate swaps to convert a series of future short-term borrowings to fixed-rate payments. These interest rate swaps qualify as cash flow hedging instruments under ASC 815 so gains and losses are recorded in Other Comprehensive Income to the extent the hedge is effective. Gains and losses on the interest rate swaps are reclassified from OCI to earnings in the period the hedged transaction affects earnings and are included in the same income statement line item that the hedged transaction is recorded. Last-of-layer loan portfolio hedges. The Company has entered into interest rate swaps to hedge the portion of the respective closed portfolios of prepayable mortgage loans that are expected to remain at the end of the hedge term. These hedges qualify as last-of-layer hedges under ASC 815 and provide for matching of the recognition of the gains and losses on the interest rate swap and the related hedged item. Commercial loan hedges.
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. Costs for improvements are capitalized. Charges for ordinary maintenance and repairs are expensed to operations as incurred.
Real estate owned	Real estate owned. Real estate properties acquired through foreclosure of loans or through acquisitions are recorded initially at fair value less selling costs and are subsequently recorded at lower of cost or fair value. Costs for improvements are capitalized. Any gains (losses) and maintenance costs are recorded in Gain (loss) on real estate owned, net.
Intangible assets	Intangible assets.
Income taxes	Income taxes. Income taxes are accounted for using the asset and liability method, which requires the recognition of deferred tax assets and liabilities for the expected future tax consequences of events that have been included in the financial statements. Under this method, a deferred tax asset or liability is determined based on the temporary differences between the financial statement and corresponding tax treatment of income, gains, losses, deductions or credits using enacted tax rates in effect for the year in which the differences are expected to reverse. The provision for income taxes includes current and deferred income tax expense based on net income adjusted for temporary and permanent differences such as depreciation, loan loss reserve, tax-exempt interest, and affordable housing tax credits. Reserves for uncertain tax positions, together with any related interest and penalties, if applicable, and amortization of affordable housing tax credit investments are recorded within income tax expense.
Accounting for stock-based compensation	Accounting for stock-based compensation. We recognize in the statement of operations the grant-date fair value of stock options and other equity-based forms of compensation issued to employees over the employees' requisite service period (generally the vesting period). The requisite service period may be subject to performance conditions. Stock options and restricted stock awards generally vest ratably over two to five years and are recognized as expense over that same period of time. The exercise price of each option equals the market price of the Company's common stock on the date of the grant, and the maximum term is ten years .
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.
New accounting pronouncements	In April 2019, the Financial Accounting Standards Board (“FASB”) issued Accounting Standards Update (“ASU”) 2019-04, Codification Improvements to Topic 326, Financial Instruments-Credit Losses, Topic 815, Derivatives and Hedging, and Topic 825, Financial Instruments , that clarifies and improves areas of guidance related to the recently issued standards on credit losses (ASU 2016-13), hedging (ASU 2017-12), and recognition and measurement of financial instruments (ASU 2016-01). The amendments generally have the same effective dates as their related standards. If already adopted, the amendments of ASU 2016-01 and ASU 2016-13 are effective for fiscal years beginning after December 15, 2019 and the amendments of ASU 2017-12 are effective as of the beginning of the Company’s next annual reporting period; early adoption is permitted. The Company previously adopted both ASU 2017-12 and ASU 2016-01 and does not expect the amendments of ASU 2019-04 will have a material impact on its consolidated financial statements. The Company is continuing to evaluate the impact of ASU 2016-13 and will consider the amendments of ASU 2019-04 as part of that process. In August 2018, the FASB issued ASU 2018-15, Customer’s Accounting for Implementation Costs Incurred in a Cloud Computing Arrangement That is a Service Contract . The amendments in this ASU align the requirements for capitalizing implementation costs incurred in a hosting arrangement that is a service contract with the requirements for capitalizing implementation costs incurred to develop or obtain internal-use software. The amendments also require the entity to expense the capitalized implementation costs of a hosting arrangement that is a service contract over the term of the hosting arrangement, including reasonably certain renewal periods. The amendments in the ASU are effective for fiscal years beginning after December 15, 2019 and interim periods within those fiscal years. Early adoption is permitted, including adoption in any interim period. The Company is assessing the impact that this guidance will have on its consolidated financial statements. In August 2018, the FASB issued ASU 2018-13, Fair Value Measurement (Topic 820): Disclosure Framework - Changes to the Disclosure Requirements for Fair Value Measurement . This ASU adds, eliminates, and modifies certain disclosure requirements for fair value measurements. Among the changes, entities will no longer be required to disclose the amount of and reasons for transfers between Level 1 and Level 2 of the fair value hierarchy, but will be required to disclose the range and weighted average used to develop significant unobservable inputs for Level 3 fair value measurements. The ASU is effective for interim and annual reporting periods beginning after December 15, 2019; early adoption is permitted. Entities are also allowed to elect early adoption of the eliminated or modified disclosure requirements and delay adoption of the added disclosure requirements until their effective date. As the ASU only revises disclosure requirements, this guidance will not have a material impact on the Company's consolidated financial statements. In June 2016, the FASB issued ASU 2016-13, Financial Instruments - Credit Losses . The ASU, as amended, is intended to provide financial statement users with more decision-useful information about the expected credit losses on financial instruments that are not accounted for at fair value through net income, including loans held for investment, held-to-maturity debt securities, trade and other receivables, net investments in leases and other commitments to extend credit held by a reporting entity at each reporting date. The amendments require that financial assets measured at amortized cost be presented at the net amount expected to be collected, through an allowance for credit losses that is deducted from the amortized cost basis. The ASU eliminates the current framework of recognizing probable incurred losses and instead requires an entity to use its current estimate of all expected credit losses over the contractual life. The measurement of expected credit losses is based upon historical experience, current conditions, and reasonable and supportable forecasts that affect the collectability of the financial assets. For purchased financial assets with a more-than-insignificant amount of credit deterioration since origination (“PCD assets”) that are measured at amortized cost, an allowance for expected credit losses is recorded as an adjustment to the cost basis of the asset. Subsequent changes in estimated cash flows would be recorded as an adjustment to the allowance and through the statement of income. Credit losses relating to available-for-sale debt securities will be recorded through an allowance for credit losses rather than as a direct write-down to the security's cost basis. The amendments in this ASU are effective for fiscal years beginning after December 15, 2019, including interim periods within those fiscal years. For most debt securities, the transition approach requires a cumulative-effect adjustment to the statement of financial position as of the beginning of the first reporting period the guidance is effective. For other-than-temporarily impaired debt securities and PCD assets, the guidance will be applied prospectively. The Company is currently in the process of evaluating the impact of the amended guidance on its consolidated financial statements and the reserve for credit losses may increase upon adoption given that the allowance will be required to cover the full remaining expected life of the portfolio upon adoption, rather than the incurred loss model under current U.S. GAAP. The extent of this increase is still being evaluated and will depend on economic conditions and the composition of the Company’s loan, lease and held-to-maturity securities portfolios at the time of adoption. In February 2016, the FASB issued ASU 2016-02, Leases. The ASU, as amended, requires lessees to recognize a lease liability, which is a lessee's obligation to make lease payments arising from a lease, and a right-of-use asset, which is an asset that represents the lessee's right to use, or control the use of, a specified asset for the lease term. The guidance also simplifies the accounting for sale and leaseback transactions and introduces new disclosure requirements for leasing arrangements. Accounting by lessors is largely unchanged. The amendments are effective for fiscal years beginning after December 15, 2018, including interim periods within those fiscal years. The Company has adopted the standard effective October 1, 2019 utilizing the transition method allowed under ASU 2018-11 and will not restate comparative periods. The Company leases a number of properties under non-cancelable operating leases which will be subject to this ASU. We have elected the package of practical expedients permitted under the transition guidance, which allows us to carryforward our historical lease classification and our assessment on whether a contract is or contains a lease. We have also elected to keep leases with an initial term of 12 months or less off the balance sheet. The adoption of the new standard has resulted in an increase in other assets and an increase in other liabilities on October 1, 2019 that is not material. The Company has recognized no cumulative effect adjustment to the beginning balance of retained earnings upon adoption and there will be no material impact to our Consolidated Statement of Income as a result of this ASU.

Summary of Significant Accoun_3

Summary of Significant Accounting Policies (Tables)	12 Months Ended
	Sep. 30, 2019
Accounting Policies [Abstract]
Schedule of goodwill and intangible assets	The table below provides detail regarding the Company's intangible assets. Goodwill Core Deposit and Other Intangibles Total (In thousands) Balance at September 30, 2017 $ 293,153 $ 5,529 $ 298,682 Additions (1) 8,215 6,595 14,810 Amortization (2) — (2,206 ) (2,206 ) Balance at September 30, 2018 301,368 9,918 311,286 Additions — — — Amortization — (2,039 ) (2,039 ) Balance at September 30, 2019 $ 301,368 $ 7,879 $ 309,247 (1) During 2018 , an immaterial correction was recorded related to acquisitions of insurance agency businesses in prior years. The balance sheet classification correction resulted in an increase in goodwill of $7,135,000 and finite-lived intangible assets of $5,106,000 and a corresponding decrease in other assets of $12,241,000 . (2) During 2018 , an immaterial correction of $1,500,000 was recorded to amortization expense for intangible assets stemming from acquisitions of insurance agency businesses in prior years.
Schedule of future amortization expense	The table below presents the estimated future amortization expense of core deposit and other intangibles for the next five years. Fiscal Year Expense (In thousands) 2020 $ 1,984 2021 1,140 2022 804 2023 775 2024 755

Investment Securities (Tables)

Investment Securities (Tables)	12 Months Ended
	Sep. 30, 2019
Investments, Debt and Equity Securities [Abstract]
Investments by contractual maturity date	The tables below provide detail regarding the amortized cost and fair value of available-for-sale and held-to-maturity investment securities. September 30, 2019 Amortized Cost Gross Unrealized Fair Value Yield Gains Losses (In thousands) Available-for-sale securities U.S. government and agency securities due 5 to 10 years $ 65,287 $ 39 $ (629 ) $ 64,697 2.43 % Over 10 years 207,067 1 (987 ) 206,081 3.02 Corporate debt securities due Within 1 year 43,903 411 — 44,314 3.65 1 to 5 years 70,000 689 (50 ) 70,639 3.29 5 to 10 years 92,931 1,879 — 94,810 3.27 Municipal bonds due 1 to 5 years 1,430 14 — 1,444 1.94 Over 10 years 20,303 895 — 21,198 6.45 Mortgage-backed securities Agency pass-through certificates 957,150 26,533 (1,124 ) 982,559 3.29 1,458,071 30,461 (2,790 ) 1,485,742 3.27 Held-to-maturity securities Mortgage-backed securities Agency pass-through certificates 1,428,480 19,945 (337 ) 1,448,088 3.15 Commercial MBS 15,000 7 — 15,007 2.89 1,443,480 19,952 (337 ) 1,463,095 3.15 $ 2,901,551 $ 50,413 $ (3,127 ) $ 2,948,837 3.21 % September 30, 2018 Amortized Cost Gross Unrealized Fair Value Yield Gains Losses (In thousands) Available-for-sale securities U.S. government and agency securities due 5 to 10 years $ 60,872 $ — $ (1,473 ) $ 59,399 2.55 % Over 10 years 148,099 109 (314 ) 147,894 3.05 Equity securities 1 to 5 years 500 — (12 ) 488 1.80 Corporate debt securities due 1 to 5 years 113,762 1,875 (13 ) 115,624 3.59 5 to 10 years 69,965 35 (929 ) 69,071 3.23 Municipal bonds due 1 to 5 years 1,398 — (24 ) 1,374 2.05 Over 10 years 20,323 1,281 — 21,604 6.45 Mortgage-backed securities Agency pass-through certificates 908,092 1,383 (13,434 ) 896,041 3.29 Commercial MBS 3,460 2 — 3,462 4.36 1,326,471 4,685 (16,199 ) 1,314,957 3.30 Held-to-maturity securities Mortgage-backed securities Agency pass-through certificates 1,610,420 305 (76,983 ) 1,533,742 3.16 Commercial MBS 15,000 28 — 15,028 3.03 1,625,420 333 (76,983 ) 1,548,770 3.16 $ 2,951,891 $ 5,018 $ (93,182 ) $ 2,863,727 3.22 %
Schedule of unrealized losses and fair value of securities	The following table shows the gross unrealized losses and fair value of securities at September 30, 2019 , and September 30, 2018 , by length of time that individual securities in each category have been in a continuous loss position. Management believes that the declines in fair value of these investments are not an other-than-temporary impairment as these losses are due to a change in interest rates rather than any credit deterioration. The impairment is also deemed to be temporary because: 1) the Company does not intend to sell the security, and 2) it is not more likely than not that it will be required to sell the security before recovery of the entire amortized cost basis of the security. September 30, 2019 Less than 12 months 12 months or more Total Unrealized Gross Losses Fair Value Unrealized Gross Losses Fair Value Unrealized Gross Losses Fair Value (In thousands) Corporate debt securities $ — $ — $ (50 ) $ 24,950 $ (50 ) $ 24,950 U.S. government and agency securities (656 ) 152,715 (960 ) 77,391 (1,616 ) 230,106 Mortgage-backed securities (148 ) 87,895 (1,313 ) 270,802 (1,461 ) 358,697 $ (804 ) $ 240,610 $ (2,323 ) $ 373,143 $ (3,127 ) $ 613,753 September 30, 2018 Less than 12 months 12 months or more Total Unrealized Gross Losses Fair Value Unrealized Gross Losses Fair Value Unrealized Gross Losses Fair Value (In thousands) Corporate debt securities $ (929 ) $ 49,072 $ (14 ) $ 24,988 $ (943 ) $ 74,060 Municipal bonds (24 ) 1,374 — — (24 ) 1,374 U.S. government and agency securities (141 ) 37,565 (1,645 ) 76,499 (1,786 ) 114,064 Equity securities (12 ) 488 — — (12 ) 488 Mortgage-backed securities (28,748 ) 1,035,754 (61,669 ) 1,183,017 (90,417 ) 2,218,771 $ (29,854 ) $ 1,124,253 $ (63,328 ) $ 1,284,504 $ (93,182 ) $ 2,408,757

Loans Receivable (Tables)

Loans Receivable (Tables)	12 Months Ended
	Sep. 30, 2019
Receivables [Abstract]
Schedule of loans receivable	The following table is a summary of loans receivable. September 30, 2019 September 30, 2018 (In thousands) (In thousands) Gross loans by category Single-family residential $ 5,835,194 43.8 % $ 5,798,966 45.1 % Construction 2,038,052 15.3 1,890,668 14.7 Construction - custom 540,741 4.1 624,479 4.9 Land - acquisition & development 204,107 1.5 155,204 1.2 Land - consumer lot loans 99,694 0.7 102,036 0.8 Multi-family 1,422,674 10.7 1,385,125 10.8 Commercial real estate 1,631,170 12.3 1,452,168 11.3 Commercial & industrial 1,268,695 9.5 1,140,874 8.9 HELOC 142,178 1.1 130,852 1.0 Consumer 129,883 1.0 173,306 1.3 Total gross loans 13,312,388 100 % 12,853,678 100 % Less: Allowance for probable losses 131,534 129,257 Loans in process 1,201,341 1,195,506 Net deferred fees, costs and discounts 48,938 51,834 Total loan contra accounts 1,381,813 1,376,597 Net loans $ 11,930,575 $ 11,477,081
Schedule of fixed and adjustable rate loans	The following summary breaks down the Company's fixed rate and adjustable rate loans by time to maturity or to rate adjustment. September 30, 2019 Fixed-Rate Adjustable-Rate Term To Maturity Gross Loans % of Gross Loans Term To Rate Adjustment Gross Loans % of Gross Loans (In thousands) (In thousands) Within 1 year $ 135,426 1.0 % Less than 1 year $ 4,056,238 30.5 % 1 to 3 years 416,285 3.1 1 to 3 years 558,197 4.2 3 to 5 years 341,838 2.6 3 to 5 years 489,151 3.7 5 to 10 years 993,685 7.5 5 to 10 years 110,934 0.8 10 to 20 years 1,059,127 8.0 10 to 20 years 32,242 0.2 Over 20 years 5,101,241 38.3 Over 20 years 18,024 0.1 $ 8,047,602 60.5 % $ 5,264,786 39.5 %
Schedule of loans receivable by loan category and geography	The following tables provide information regarding loans receivable by loan category and geography. September 30, 2019 Single - Multi- Land - Land - Construction - custom Construction Commercial Commercial Consumer HELOC Total (In thousands) Washington $ 3,125,058 $ 351,771 $ 82,891 $ 61,534 $ 315,615 $ 482,453 $ 530,165 $ 521,049 $ 90,263 $ 83,818 $ 5,644,617 Oregon 694,577 353,388 50,195 13,228 61,699 430,749 294,574 287,922 1,376 14,780 2,202,488 Arizona 575,256 331,088 18,871 10,990 58,550 262,400 246,041 78,590 1,642 12,570 1,595,998 Utah 527,142 58,865 — 4,116 45,277 246,097 74,454 40,368 127 7,458 1,003,904 Texas 161,616 82,598 2,936 416 1,889 420,627 165,692 165,646 467 — 1,001,887 New Mexico 205,559 174,485 32,443 2,049 17,775 68,120 194,621 15,379 1,162 11,474 723,067 Idaho 321,184 43,446 16,771 4,658 27,499 88,956 91,725 34,125 84 8,932 637,380 Nevada 190,941 26,837 — 2,694 12,437 — 32,094 20,426 95 3,129 288,653 Other 33,861 196 — 9 — 38,650 1,804 105,190 34,667 17 214,394 $ 5,835,194 $ 1,422,674 $ 204,107 $ 99,694 $ 540,741 $ 2,038,052 $ 1,631,170 $ 1,268,695 $ 129,883 $ 142,178 $ 13,312,388 Percentage by geographic area September 30, 2019 Single - Multi- Land - Land - Construction - custom Construction Commercial Commercial Consumer HELOC Total As % of total gross loans Washington 23.5 % 2.7 % 0.7 % 0.5 % 2.5 % 3.6 % 4.1 % 3.8 % 0.7 % 0.6 % 42.7 % Oregon 5.2 2.7 0.4 0.1 0.5 3.2 2.2 2.2 — 0.1 16.6 Arizona 4.3 2.5 0.1 0.1 0.4 2.0 1.8 0.6 — 0.1 11.9 Utah 4.0 0.4 — — 0.3 1.8 0.6 0.3 — 0.1 7.5 Texas 1.2 0.6 — — — 3.2 1.2 1.2 — — 7.4 New Mexico 1.5 1.3 0.2 — 0.1 0.5 1.5 0.1 — 0.1 5.3 Idaho 2.4 0.3 0.1 — 0.2 0.7 0.7 0.3 — 0.1 4.8 Nevada 1.4 0.2 — — 0.1 — 0.2 0.2 — — 2.1 Other 0.3 — — — — 0.3 — 0.8 0.3 — 1.7 43.8 % 10.7 % 1.5 % 0.7 % 4.1 % 15.3 % 12.3 % 9.5 % 1.0 % 1.1 % 100 % Percentage by geographic area as a % of each loan type September 30, 2019 Single - Multi- Land - Land - Construction - custom Construction Commercial Commercial Consumer HELOC As % of total gross loans Washington 53.6 % 24.7 % 40.6 % 61.7 % 58.4 % 23.7 % 32.5 % 41.1 % 69.5 % 59.0 % Oregon 11.9 24.8 24.6 13.3 11.4 21.1 18.1 22.7 1.1 10.4 Arizona 9.9 23.3 9.2 11.0 10.8 12.9 15.1 6.2 1.3 8.8 Utah 9.0 4.1 — 4.1 8.4 12.1 4.6 3.2 0.1 5.2 Texas 2.8 5.8 1.4 0.4 0.3 20.6 10.2 13.1 0.4 — New Mexico 3.5 12.3 15.9 2.1 3.3 3.3 11.9 1.2 0.9 8.1 Idaho 5.5 3.1 8.2 4.7 5.1 4.4 5.6 2.7 0.1 6.3 Nevada 3.3 1.9 — 2.7 2.3 — 2.0 1.6 0.1 2.2 Other 0.6 — — — — 1.9 0.1 8.3 26.7 — 100 % 100 % 100 % 100 % 100 % 100 % 100 % 100 % 100 % 100 %
Schedule of impaired loans, loan commitments and loans serviced for others	The following table provides additional information on impaired loans, loan commitments and loans serviced for others. September 30, 2019 September 30, 2018 (In thousands) Recorded investment in impaired loans $ 149,546 $ 199,545 TDRs included in impaired loans 121,677 156,858 Specific reserves on impaired loans 439 517 Average balance of impaired loans for year ended 175,187 228,398 Interest income from impaired loans for year ended 7,918 10,232 Outstanding fixed-rate origination commitments 357,247 400,426 Gross loans serviced for others 102,282 77,958
Non accrual loans held by the company	The following table sets forth information regarding non-accrual loans. September 30, 2019 September 30, 2018 (In thousands) (In thousands) Non-accrual loans: Single-family residential $ 25,271 74.9 % $ 27,643 49.6 % Construction — — 2,427 4.4 Land - acquisition & development 169 0.5 920 1.7 Land - consumer lot loans 246 0.7 787 1.4 Commercial real estate 5,835 17.3 8,971 16.1 Commercial & industrial 1,292 3.8 14,394 25.8 HELOC 907 2.7 523 0.9 Consumer 11 — 21 — Total non-accrual loans $ 33,731 100 % $ 55,686 100 % Non-accrual loans as % of total loans 0.28 % 0.49 %
Aging of past due loans	The following tables break down delinquent loans by loan category and delinquency bucket. September 30, 2019 Amount of Loans Days Delinquent Based on $ Amount of Loans % based on $ Loan type Net of Loans in Process Current 30 60 90 Total (In thousands) Single-family residential $ 5,835,186 $ 5,809,239 $ 3,672 $ 3,211 $ 19,064 $ 25,947 0.44 % Construction 1,164,889 1,164,889 — — — — — Construction - custom 255,505 255,505 — — — — — Land - acquisition & development 161,194 161,194 — — — — — Land - consumer lot loans 99,694 98,916 112 619 47 778 0.78 Multi-family 1,422,652 1,422,652 — — — — — Commercial real estate 1,631,171 1,625,509 1,614 285 3,763 5,662 0.35 Commercial & industrial 1,268,695 1,267,828 — — 867 867 0.07 HELOC 142,178 140,718 580 183 697 1,460 1.03 Consumer 129,883 129,227 295 117 244 656 0.51 Total Loans $ 12,111,047 $ 12,075,677 $ 6,273 $ 4,415 $ 24,682 $ 35,370 0.29 % Delinquency % 99.71% 0.05% 0.04% 0.20% 0.29% September 30, 2018 Amount of Loans Days Delinquent Based on $ Amount of Loans % based on $ Loan type Net of Loans in Process Current 30 60 90 Total (In thousands) Single-family residential $ 5,798,353 $ 5,768,253 $ 7,983 $ 3,562 $ 18,555 $ 30,100 0.52 % Construction 1,062,855 1,060,428 — — 2,427 2,427 0.23 Construction - custom 289,192 289,192 — — — — — Land - acquisition & development 123,560 122,620 — 270 670 940 0.76 Land - consumer lot loans 101,908 101,294 144 117 353 614 0.60 Multi-family 1,385,103 1,385,103 — — — — — Commercial real estate 1,452,169 1,448,946 316 1,767 1,140 3,223 0.22 Commercial & industrial 1,140,874 1,130,836 — — 10,038 10,038 0.88 HELOC 130,852 129,510 567 469 306 1,342 1.03 Consumer 173,306 172,777 172 328 29 529 0.31 Total Loans $ 11,658,172 $ 11,608,959 $ 9,182 $ 6,513 $ 33,518 $ 49,213 0.42 % Delinquency % 99.58% 0.08% 0.06% 0.29% 0.42%
Schedule of loan modifications	The following table provides information related to loans that were modified in a TDR during the periods presented. Twelve Months Ended September 30, 2019 Twelve Months Ended September 30, 2018 Pre-Modification Post-Modification Pre-Modification Post-Modification Outstanding Outstanding Outstanding Outstanding Number of Recorded Recorded Number of Recorded Recorded Troubled Debt Restructurings: Contracts Investment Investment Contracts Investment Investment (In thousands) (In thousands) Single-family residential 8 $ 1,225 $ 1,225 27 $ 5,070 $ 5,070 Land - acquisition & development — — — 1 107 107 Land - consumer lot loans 1 40 40 — — — Commercial real estate — — — 1 120 120 Commercial & industrial — — — 4 7,739 7,739 HELOC — — — 2 95 95 Consumer — — — 1 — — 9 $ 1,265 $ 1,265 36 $ 13,131 $ 13,131 The following table provides information on payment defaults occurring during the periods presented where the loan had been modified in a TDR within 12 months of the payment default. Twelve Months Ended September 30, 2019 Twelve Months Ended September 30, 2018 Number of Recorded Number of Recorded TDRs That Subsequently Defaulted: Contracts Investment Contracts Investment (In thousands) (In thousands) Single-family residential 7 $ 1,546 4 $ 433 HELOC — — 1 77 7 $ 1,546 5 $ 510

Allowance for Loan Losses (Tabl

Allowance for Loan Losses (Tables)	12 Months Ended
	Sep. 30, 2019
Receivables [Abstract]
Summary of activity in allowance for loan losses	The following tables summarize the activity in the allowance for loan losses. Twelve Months Ended September 30, 2019 Beginning Allowance Charge-offs Recoveries Provision & Transfers Ending Allowance (In thousands) Single-family residential $ 33,033 $ (268 ) $ 1,020 $ (2,797 ) $ 30,988 Construction 31,317 — 99 888 32,304 Construction - custom 1,842 (1,973 ) — 1,500 1,369 Land - acquisition & development 7,978 (107 ) 7,457 (6,173 ) 9,155 Land - consumer lot loans 2,164 (804 ) 719 64 2,143 Multi-family 8,329 — — (938 ) 7,391 Commercial real estate 11,852 (428 ) 1,102 644 13,170 Commercial & industrial 28,702 (5,782 ) 3,443 5,087 31,450 HELOC 781 (1,086 ) 46 1,362 1,103 Consumer 3,259 (1,028 ) 1,167 (937 ) 2,461 $ 129,257 $ (11,476 ) $ 15,053 $ (1,300 ) $ 131,534 Twelve Months Ended September 30, 2018 Beginning Allowance Charge-offs Recoveries Provision & Transfers Ending Allowance (In thousands) Single-family residential $ 36,892 $ (1,142 ) $ 757 $ (3,474 ) $ 33,033 Construction 24,556 — — 6,761 31,317 Construction - custom 1,944 (50 ) — (52 ) 1,842 Land - acquisition & development 6,829 (13 ) 14,223 (13,061 ) 7,978 Land - consumer lot loans 2,649 (67 ) 35 (453 ) 2,164 Multi-family 7,862 — — 467 8,329 Commercial real estate 11,818 (36 ) 189 (119 ) 11,852 Commercial & industrial 28,524 (3,574 ) 714 3,038 28,702 HELOC 855 (668 ) 71 523 781 Consumer 1,144 (382 ) 993 1,504 3,259 $ 123,073 $ (5,932 ) $ 16,982 $ (4,866 ) $ 129,257
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 general and specific reserves. September 30, 2019 Loans Collectively Evaluated for Impairment Loans Individually Evaluated for Impairment General Reserve Allocation Recorded Investment of Loans Ratio Specific Reserve Allocation Recorded Investment of Loans Ratio (In thousands) (In thousands) Single-family residential $ 30,988 $ 5,822,200 0.5 % $ — $ 17,978 — % Construction 32,304 1,164,889 2.8 — — — Construction - custom 1,369 255,505 0.5 — — — Land - acquisition & development 9,135 160,964 5.7 20 230 8.7 Land - consumer lot loans 2,143 95,574 2.2 — 375 — Multi-family 7,387 1,422,266 0.5 4 385 1.0 Commercial real estate 12,847 1,618,406 0.8 323 12,765 2.5 Commercial & industrial 31,358 1,266,913 2.5 92 1,805 5.1 HELOC 1,103 140,378 0.8 — 837 — Consumer 2,461 129,527 1.9 — 50 — $ 131,095 $ 12,076,622 1.1 % $ 439 $ 34,425 1.3 % September 30, 2018 Loans Collectively Evaluated for Impairment Loans Individually Evaluated for Impairment General Reserve Allocation Recorded Investment of Loans Ratio Specific Reserve Allocation Recorded Investment of Loans Ratio (In thousands) (In thousands) Single-family residential $ 33,033 $ 5,782,870 0.6 % $ — $ 21,345 — % Construction 31,317 1,060,428 3.0 — 2,427 — Construction - custom 1,842 289,192 0.6 — — — Land - acquisition & development 7,969 122,639 6.5 9 920 1.0 Land - consumer lot loans 2,164 96,583 2.2 — 507 — Multi-family 8,325 1,384,655 0.6 4 448 1.0 Commercial real estate 11,702 1,432,791 0.8 150 19,378 0.8 Commercial & industrial 28,348 1,126,438 2.5 354 14,437 2.5 HELOC 781 128,715 0.6 — 1,162 — Consumer 3,259 173,181 1.9 — 56 — $ 128,740 $ 11,597,492 1.1 % $ 517 $ 60,680 0.9 %
Summary of loans based on credit quality indicators	The following tables provide information on loans based on credit quality indicators (defined above). September 30, 2019 Internally Assigned Grade Total Pass Special mention Substandard Doubtful Loss Gross Loans (In thousands) Loan type Single-family residential $ 5,808,444 $ — $ 26,750 $ — $ — $ 5,835,194 Construction 2,038,052 — — — — 2,038,052 Construction - custom 540,741 — — — — 540,741 Land - acquisition & development 200,283 — 3,824 — — 204,107 Land - consumer lot loans 98,828 — 866 — — 99,694 Multi-family 1,418,837 — 3,837 — — 1,422,674 Commercial real estate 1,602,634 2,754 25,782 — — 1,631,170 Commercial & industrial 1,229,891 18,125 20,679 — — 1,268,695 HELOC 141,271 — 907 — — 142,178 Consumer 129,872 — 11 — — 129,883 Total gross loans $ 13,208,853 $ 20,879 $ 82,656 $ — $ — $ 13,312,388 Total grade as a % of total gross loans 99.2 % 0.2 % 0.6 % — % — % September 30, 2018 Internally Assigned Grade Total Pass Special mention Substandard Doubtful Loss Gross Loans (In thousands) Loan type Single-family residential $ 5,766,096 $ — $ 32,870 $ — $ — $ 5,798,966 Construction 1,886,304 1,937 2,427 — — 1,890,668 Construction - custom 624,479 — — — — 624,479 Land - acquisition & development 152,984 — 2,220 — — 155,204 Land - consumer lot loans 101,249 — 787 — — 102,036 Multi-family 1,378,803 1,633 4,689 — — 1,385,125 Commercial real estate 1,421,602 7,114 23,452 — — 1,452,168 Commercial & industrial 1,093,405 16,513 30,956 — — 1,140,874 HELOC 130,330 — 522 — — 130,852 Consumer 173,285 — 21 — — 173,306 Total gross loans $ 12,728,537 $ 27,197 $ 97,944 $ — $ — $ 12,853,678 Total grade as a % of total gross loans 99.0 % 0.2 % 0.8 % — % — %
Schedule of gross loans by payment activity	The following tables provide information on gross loans based on payment activity. September 30, 2019 Performing Loans Non-Performing Loans Amount % of Total Gross Loans Amount % of Total Gross Loans (In thousands) (In thousands) Single-family residential $ 5,809,923 99.6 % $ 25,271 0.4 % Construction 2,038,052 100.0 — — Construction - custom 540,741 100.0 — — Land - acquisition & development 203,938 99.9 169 0.1 Land - consumer lot loans 99,448 99.8 246 0.2 Multi-family 1,422,674 100.0 — — Commercial real estate 1,625,335 99.6 5,835 0.4 Commercial & industrial 1,267,403 99.9 1,292 0.1 HELOC 141,271 99.4 907 0.6 Consumer 129,872 100.0 11 — $ 13,278,657 99.7 % $ 33,731 0.3 % September 30, 2018 Performing Loans Non-Performing Loans Amount % of Total Gross Loans Amount % of Total Gross Loans (In thousands) (In thousands) Single-family residential $ 5,771,323 99.5 % $ 27,643 0.5 % Construction 1,888,241 99.9 2,427 0.1 Construction - custom 624,479 100.0 — — Land - acquisition & development 154,284 99.4 920 0.6 Land - consumer lot loans 101,249 99.2 787 0.8 Multi-family 1,385,125 100.0 — — Commercial real estate 1,443,197 99.4 8,971 0.6 Commercial & industrial 1,126,480 98.7 14,394 1.3 HELOC 130,329 99.6 523 0.4 Consumer 173,285 100.0 21 — $ 12,797,992 99.6 % $ 55,686 0.4 %
Summary of impaired loans by category	The following tables provide information on impaired loans by loan category. September 30, 2019 Recorded Investment Unpaid Principal Balance Related Allowance Average Recorded Investment (In thousands) Impaired loans with no related allowance recorded: Single-family residential $ 17,979 $ 19,252 $ — $ 16,685 Construction — — — 1,172 Construction - custom — — — 251 Land - acquisition & development 78 143 — 290 Land - consumer lot loans 344 848 — 287 Multi-family — — — 286 Commercial real estate 7,467 11,881 — 8,890 Commercial & industrial 1,114 5,312 — 7,168 HELOC 837 931 — 597 Consumer 50 119 — 23 27,869 38,486 — 35,649 Impaired loans with an allowance recorded: Single-family residential 112,042 114,609 2,208 125,976 Land - acquisition & development 91 152 — 99 Land - consumer lot loans 3,556 3,695 20 4,324 Multi-family 385 385 4 418 Commercial real estate 4,168 5,298 323 5,160 Commercial & industrial 426 691 92 2,535 HELOC 949 963 — 961 Consumer 60 282 — 65 121,677 126,075 2,647 (1) 139,538 Total: Single-family residential 130,021 133,861 2,208 142,661 Construction — — — 1,172 Construction - custom — — — 251 Land - acquisition & development 169 295 — 389 Land - consumer lot loans 3,900 4,543 20 4,611 Multi-family 385 385 4 704 Commercial real estate 11,635 17,179 323 14,050 Commercial & industrial 1,540 6,003 92 9,703 HELOC 1,786 1,894 — 1,558 Consumer 110 401 — 88 $ 149,546 $ 164,561 $ 2,647 (1) $ 175,187 ____________________ (1) Includes $439,000 of specific reserves and $2,208,000 included in the general reserves. September 30, 2018 Recorded Investment Unpaid Principal Balance Related Allowance Average Recorded Investment (In thousands) Impaired loans with no related allowance recorded: Single-family residential $ 18,872 $ 20,050 $ — $ 20,097 Construction 2,698 2,818 — 1,349 Construction - custom — — — 74 Land - acquisition & development 814 814 — 572 Land - consumer lot loans 311 336 — 260 Multi-family — — — 70 Commercial real estate 9,425 14,035 — 11,158 Commercial & industrial 10,137 10,146 — 9,208 HELOC 410 1,170 — 450 Consumer 20 56 — 54 42,687 49,425 — 43,292 Impaired loans with an allowance recorded: Single-family residential 139,796 143,099 2,871 161,729 Land - acquisition & development 107 157 — 39 Land - consumer lot loans 4,916 5,290 9 6,449 Multi-family 448 448 4 471 Commercial real estate 6,254 7,733 150 10,445 Commercial & industrial 4,291 7,506 354 4,495 HELOC 976 984 — 1,395 Consumer 70 70 — 83 156,858 165,287 3,388 (1) 185,106 Total: Single-family residential 158,668 163,149 2,871 181,826 Construction 2,698 2,818 — 1,349 Construction - custom — — — 74 Land - acquisition & development 921 971 — 611 Land - consumer lot loans 5,227 5,626 9 6,709 Multi-family 448 448 4 541 Commercial real estate 15,679 21,768 150 21,603 Commercial & industrial 14,428 17,652 354 13,703 HELOC 1,386 2,154 — 1,845 Consumer 90 126 — 137 $ 199,545 $ 214,712 $ 3,388 (1) $ 228,398 ____________________ (1) Includes $517,000 of specific reserves and $2,871,000 included in the general reserves.

Fair Value Measurements (Tables

Fair Value Measurements (Tables)	12 Months Ended
	Sep. 30, 2019
Fair Value Disclosures [Abstract]
Fair value of assets measured on recurring basis	The following table presents the balance and level in the fair value hierarchy for assets and liabilities that are measured at fair value on a recurring basis. September 30, 2019 Level 1 Level 2 Level 3 Total (In thousands) Available-for-sale securities U.S. government and agency securities $ — $ 270,778 $ — $ 270,778 Municipal bonds — 22,642 — 22,642 Corporate debt securities — 209,763 — 209,763 Mortgage-backed securities Agency pass-through certificates — 982,559 — 982,559 Total Available-for-sale securities — 1,485,742 — 1,485,742 Client swap program hedges — 20,381 — 20,381 Mortgage loan fair value hedges — 1,608 — 1,608 Total Financial Assets $ — $ 1,507,731 $ — $ 1,507,731 Financial Liabilities Client swap program hedges $ — $ 20,381 $ — $ 20,381 Commercial loan fair value hedges — 4,288 — 4,288 Borrowings cash flow hedges — 7,877 — 7,877 Total Financial Liabilities $ — $ 32,546 $ — $ 32,546 There were no transfers between, into and/or out of Levels 1, 2 or 3 during the year ended September 30, 2019 . September 30, 2018 Level 1 Level 2 Level 3 Total (In thousands) Available-for-sale securities Equity securities $ 488 $ — $ — $ 488 U.S. government and agency securities — 207,293 — 207,293 Municipal bonds — 22,978 — 22,978 Corporate debt securities — 184,695 — 184,695 Mortgage-backed securities Agency pass-through certificates — 896,041 — 896,041 Commercial MBS — 3,462 — 3,462 Total Available-for-sale securities 488 1,314,469 — 1,314,957 Client swap program hedges — 12,731 — 12,731 Commercial loan fair value hedges — 3,857 — 3,857 Borrowings cash flow hedges — 22,250 — 22,250 Total Financial Assets $ 488 $ 1,353,307 $ — $ 1,353,795 Financial Liabilities Client swap program hedges $ — $ 12,731 $ — $ 12,731 Total Financial Liabilities $ — $ 12,731 $ — $ 12,731 There were no transfers between, into and/or out of Level 1, 2 or 3 during the year ended September 30, 2018 .
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 recorded balance of assets that were measured at estimated fair value on a nonrecurring basis for the periods presented, and the total gains (losses) resulting from those fair value adjustments for the periods presented. The estimated fair values are presented gross of estimated selling costs. September 30, 2019 Three Months Ended September 30, 2019 Twelve Months Ended September 30, 2019 Level 1 Level 2 Level 3 Total Total Gains (Losses) (In thousands) Impaired loans (1) $ — $ — $ 6,662 $ 6,662 $ (2,176 ) $ (7,796 ) Real estate owned (2) — — 7,307 7,307 (275 ) 119 Balance at end of period $ — $ — $ 13,969 $ 13,969 $ (2,451 ) $ (7,677 ) (1) The gains (losses) represent remeasurements of collateral-dependent impaired loans. (2) The gains (losses) represent aggregate writedowns and charge-offs on real estate owned. September 30, 2018 Three Months Ended September 30, 2018 Twelve Months Ended September 30, 2018 Level 1 Level 2 Level 3 Total Total Gains (Losses) (In thousands) Impaired loans (1) $ — $ — $ 16,500 $ 16,500 $ (707 ) $ (4,800 ) Real estate owned (2) — — 7,455 7,455 (126 ) (782 ) Balance at end of period $ — $ — $ 23,955 $ 23,955 $ (833 ) $ (5,582 ) (1) The gains (losses) represent remeasurements of collateral-dependent impaired loans. (2) The gains (losses) represent aggregate writedowns and charge-offs on real estate owned.
Fair value of financial instruments by balance sheet grouping	Although management is not aware of any factors that would materially affect the estimated fair value amounts presented below, such amounts have not been comprehensively revalued for purposes of these financial statements since the dates shown, and therefore, estimates of fair value subsequent to those dates may differ significantly from the amounts presented below. September 30, 2019 September 30, 2018 Level Carrying Amount Estimated Fair Value Carrying Amount Estimated Fair Value (In thousands) Financial assets Cash and cash equivalents 1 $ 419,158 $ 419,158 $ 268,650 $ 268,650 Available-for-sale securities: Equity securities 1 — — 488 488 U.S. government and agency securities 2 270,778 270,778 207,293 207,293 Municipal bonds 2 22,642 22,642 22,978 22,978 Corporate debt securities 2 209,763 209,763 184,695 184,695 Mortgage-backed securities Agency pass-through certificates 2 982,559 982,559 896,041 896,041 Commercial MBS 2 — — 3,462 3,462 Total available-for-sale securities 1,485,742 1,485,742 1,314,957 1,314,957 Held-to-maturity securities: Mortgage-backed securities Agency pass-through certificates 2 1,428,480 1,448,088 1,610,420 1,533,742 Commercial MBS 15,000 15,007 15,000 15,028 Total held-to-maturity securities 1,443,480 1,463,095 1,625,420 1,548,770 Loans receivable 3 11,930,575 12,617,600 11,477,081 11,556,326 FHLB and FRB stock 2 123,990 123,990 127,190 127,190 Other assets - client swap program hedges 2 20,381 20,381 12,731 12,731 Other assets - commercial loan fair value hedges 2 — — 3,857 3,857 Other assets - mortgage loan fair value hedges 2 1,608 1,608 — — Other assets - borrowings cash flow hedges 2 — — 22,250 22,250 Financial liabilities Time deposits 2 4,906,963 4,937,847 4,804,803 4,779,040 FHLB advances and other borrowings 2 2,250,000 2,282,887 2,330,000 2,316,964 Other liabilities - client swap program hedges 2 20,381 20,381 12,731 12,731 Other liabilities - commercial loan fair value hedges 2 4,288 4,288 — — Other liabilities - borrowings cash flow hedges 2 7,877 7,877 — —

Derivatives and Hedging Activ_2

Derivatives and Hedging Activities (Tables)	12 Months Ended
	Sep. 30, 2018
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Schedule of Fair Value, Notional Amount and Balance Sheet Classification	The following tables present the fair value, notional amount and balance sheet classification of derivative assets and liabilities at September 30, 2019 and September 30, 2018 . September 30, 2019 Derivative Assets Derivative Liabilities Balance Sheet Location Notional Fair Value Balance Sheet Location Notional Fair Value (In thousands) (In thousands) Client swap program hedges Other assets $ 425,607 $ 20,381 Other liabilities $ 425,607 $ 20,381 Commercial loan fair value hedges Other assets — — Other liabilities 95,645 4,288 Mortgage loan fair value hedges Other assets 200,000 1,608 Other liabilities — — Borrowings cash flow hedges Other assets — — Other liabilities 700,000 7,877 $ 625,607 $ 21,989 $ 1,221,252 $ 32,546 September 30, 2018 Derivative Assets Derivative Liabilities Interest rate contract purpose Balance Sheet Location Notional Fair Value Balance Sheet Location Notional Fair Value (In thousands) (In thousands) Client swap program hedges Other assets $ 395,396 $ 12,731 Other liabilities $ 395,396 $ 12,731 Commercial loan fair value hedges Other assets 97,927 3,857 Other liabilities — — Borrowings cash flow hedges Other assets 700,000 22,250 Other liabilities — — $ 1,193,323 $ 38,838 $ 395,396 $ 12,731
Schedule of Fair Value Hedge Accounting on Carrying Value of Hedged Items	The following table presents the impact of fair value hedge accounting on the carrying value of the hedged items at September 30, 2019 . (In thousands) September 30, 2019 Balance sheet line item in which hedged item is recorded Carrying value of hedged items Cumulative gain (loss) fair value hedge adjustment included in carrying amount of hedged items Loans receivable (1) (2) $ 1,612,208 $ (2,680 ) $ 1,612,208 $ (2,680 ) (1) Includes the amortized cost basis of the closed mortgage loan portfolios used to designate the hedging relationships in which the hedged items are the last layer expected to be remaining at the end of the hedging relationships. At September 30, 2019 , the amortized cost basis of the closed loan portfolios used in the hedging relationships was $1,520,647,000 , the cumulative basis adjustment associated with the hedging relationships was $1,608,000 , and the amount of the designated hedged items was $200,000,000 . (2) Includes the amortized cost basis of commercial loans designated in fair value hedging relationships. At September 30, 2019 , the amortized cost basis of the hedged commercial loans was $91,561,000 and the cumulative basis adjustment associated with the hedging relationships was $(4,288,000) .
Schedule of Impact of Derivative Instruments	The following table presents the impact of derivative instruments (client swap program) that are not designated in accounting hedges under ASC 815 for the periods presented. (In thousands) Twelve Months Ended September 30, Derivative instruments Classification of gain/(loss) recognized in income on derivative instrument 2019 Interest rate contracts: Pay fixed/receive floating swap Other noninterest income $ (33,112 ) Receive fixed/pay floating swap Other noninterest income 33,112 $ — The following table presents the impact of derivative instruments (cash flow hedges on borrowings) on AOCI for the periods presented. (In thousands) Twelve Months Ended September 30, Amount of gain/(loss) recognized in AOCI on derivatives in cash flow hedging relationships 2019 Interest rate contracts: Pay fixed/receive floating swaps on cash flow hedges of borrowings $ (28,519 ) Total pre-tax gain/(loss) recognized in AOCI $ (28,519 )
Schedule of Derivatives Instruments Statements of Financial Performance and Financial Position, Location	The following table presents the gains/(losses) on derivative instruments in fair value and cash flow accounting hedging relationships under ASC 815 for the period presented. Twelve Months Ended September 30, 2019 Interest income on loans receivable Interest expense on FHLB advances (In thousands) Interest income/(expense), including the effects of fair value and cash flow hedges $ 568,096 $ (68,190 ) Gain/(loss) on fair value hedging relationships: Interest rate contracts Amounts related to interest settlements on derivatives $ 128 Recognized on derivatives (6,504 ) Recognized on hedged items 6,479 Net income/(expense) recognized on fair value hedges $ 103 Gain/(loss) on cash flow hedging relationships: Interest rate contracts Amounts related to interest settlements on derivatives $ (2,823 ) Amount of derivative gain/(loss) reclassified from AOCI into interest income/expense — Net income/(expense) recognized on cash flow hedges $ (2,823 )

Interest Receivable (Tables)

Interest Receivable (Tables)	12 Months Ended
	Sep. 30, 2019
Receivables [Abstract]
Schedule of interest receivable	The following table provides a summary of interest receivable by interest earning asset type. September 30, 2019 September 30, 2018 (In thousands) Loans receivable $ 41,429 $ 39,176 Mortgage-backed securities 6,107 6,404 Investment securities 1,321 1,715 $ 48,857 $ 47,295

Premises and Equipment (Tables)

Premises and Equipment (Tables)	12 Months Ended
	Sep. 30, 2019
Property, Plant and Equipment [Abstract]
Premises and Equipment	The following table provides a summary of premises and equipment by asset type. September 30, 2019 September 30, 2018 Estimated Useful Life (In thousands) Land — $ 117,431 $ 110,251 Buildings 25 - 40 165,088 156,803 Leasehold improvements 7 - 15 22,765 22,887 Furniture, software and equipment 2 - 10 138,553 126,979 443,837 416,920 Less accumulated depreciation and amortization (169,822 ) (148,925 ) $ 274,015 $ 267,995

Customer Accounts (Tables)

Customer Accounts (Tables)	12 Months Ended
	Sep. 30, 2019
Banking and Thrift [Abstract]
Schedule of deposit liabilities	The following tables provide the composition of the Company's customer accounts, including time deposits. September 30, 2019 September 30, 2018 Deposit Account Balance As a % of Total Deposits Weighted Deposit Account Balance As a % of Total Deposits Weighted ($ in thousands) Non-interest checking $ 1,621,343 13.5 % — % $ 1,401,226 12.4 % — % Interest checking 1,984,576 16.6 0.61 1,778,520 15.6 0.50 Savings 753,574 6.3 0.13 836,501 7.3 0.11 Money market 2,724,308 22.7 0.82 2,566,096 22.5 0.65 Time deposits 4,906,963 40.9 1.91 4,804,803 42.2 1.50 Total $ 11,990,764 100 % 1.08 % $ 11,387,146 100 % 0.87 %
Schedule of time deposits	Time deposits by rate band are as follows: September 30, 2019 September 30, 2018 (In thousands) Time deposit accounts Less than 1.00% $ 21,281 $ 629,589 1.00% to 1.99% 3,588,689 3,761,543 2.00% to 2.99% 1,294,889 413,671 3.00% to 3.99% 2,104 — Total time deposits $ 4,906,963 $ 4,804,803 Time deposits by maturity band are as follows: September 30, 2019 September 30, 2018 (In thousands) Within 1 year $ 3,489,839 $ 2,800,978 1 to 2 years 925,170 1,335,242 2 to 3 years 294,990 296,238 Over 3 years 196,964 372,345 $ 4,906,963 $ 4,804,803
Schedule of interest expense on customer deposits	Interest expense on customer accounts consisted of the following: Year ended September 30, 2019 2018 2017 (In thousands) Checking accounts $ 12,499 $ 6,072 $ 2,721 Savings accounts 980 920 978 Money market accounts 21,967 7,788 3,592 Time deposit accounts 87,665 58,468 45,256 123,111 73,248 52,547 Less early withdrawal penalties (895 ) (756 ) (524 ) $ 122,216 $ 72,492 $ 52,023 Weighted average interest rate at end of year 1.08 % 0.87 % 0.54 % Weighted daily average interest rate during the year 1.05 % 0.65 % 0.49 %

FHLB Advances and Other Borro_2

FHLB Advances and Other Borrowings (Tables)	12 Months Ended
	Sep. 30, 2019
Federal Home Loan Banks [Abstract]
Maturity dates of outstanding FHLB advances	The table below shows the maturity dates of outstanding FHLB advances. September 30, 2019 September 30, 2018 (In thousands) FHLB advances Within 1 year $ 950,000 $ 1,680,000 1 to 3 years 750,000 300,000 3 to 5 years 400,000 200,000 More than 5 years 150,000 150,000 $ 2,250,000 $ 2,330,000
Weighted average cost and amount of advances	Financial information pertaining to the weighted-average cost and the amount of FHLB advances were as follows. 2019 2018 2017 (In thousands) Weighted average interest rate, including cash flow hedges, at end of year 2.49 % 2.66 % 2.80 % Weighted daily average interest rate, including cash flow hedges, during the year 2.69 % 2.62 % 3.00 % Daily average of FHLB advances during the year $ 2,533,890 $ 2,384,795 $ 2,167,986 Maximum amount of FHLB advances at any month end $ 2,665,000 $ 2,620,000 $ 2,350,000 Interest expense during the year (including swap interest income and expense) $ 68,190 $ 62,452 $ 64,969

Income Taxes (Tables)

Income Taxes (Tables)	12 Months Ended
	Sep. 30, 2019
Income Tax Disclosure [Abstract]
Summary of major sources of temporary differences and deferred tax effects	The table below provides a summary of the Company's tax assets and liabilities, including deferred tax assets and deferred tax liabilities by major source. Deferred tax balances represent temporary differences between the financial statement and corresponding tax treatment of income, gains, losses, deductions or credits. September 30, 2019 September 30, 2018 (In thousands) Deferred tax assets Loan loss reserves $ 31,494 $ 31,055 REO reserves 255 518 Non-accrual loan interest 891 877 Federal and state tax credits 537 1,074 Deferred compensation 3,022 3,165 Stock based compensation 1,876 1,677 Other 2,081 1,747 Total deferred tax assets 40,156 40,113 Deferred tax liabilities FHLB stock dividends 14,478 14,941 Valuation adjustment on available-for-sale securities and cash flow hedges 4,503 2,442 Loan origination fees and costs 8,385 9,285 Premises and equipment 25,399 23,429 Other 2,851 1,828 Total deferred tax liabilities 55,616 51,925 Net deferred tax asset (liability) (15,460 ) (11,812 ) Current tax asset (liability) 10,356 13,616 Net tax asset (liability) $ (5,104 ) $ 1,804
Schedule of effective income tax rate reconciliation	The table below presents a reconciliation of the statutory federal income tax rate to the Company's effective income tax rate. Year ended September 30, 2019 2018 2017 Statutory income tax rate 21 % 25 % 35 % State income tax 2 2 1 Impact of change in Federal income tax rate — (2 ) — Other differences (3 ) (4 ) (4 ) Effective income tax rate 20 % 21 % 32 %
Schedule of components of income tax expense (benefit)	The following table summarizes the Company's income tax expense (benefit) for the respective periods. Year ended September 30, 2019 2018 2017 (In thousands) Federal: Current $ 46,376 $ 40,314 $ 87,804 Deferred 1,916 8,952 (10,142 ) 48,292 49,266 77,662 State: Current $ 4,557 $ 4,243 $ 4,991 Deferred (330 ) (116 ) 31 4,227 4,127 5,022 Total Current 50,933 44,557 92,795 Deferred 1,586 8,836 (10,111 ) $ 52,519 $ 53,393 $ 82,684

Stock Award Plans (Tables)

Stock Award Plans (Tables)	12 Months Ended
	Sep. 30, 2019
Share-based Payment Arrangement [Abstract]
Summary of option activity	A summary of stock option activity and changes during the year are as follows. Options Shares Weighted Weighted Aggregate Outstanding at September 30, 2018 51,060 $ 15.25 2 $855 Granted 356,343 28.16 Exercised (22,975 ) 12.99 Forfeited (64,141 ) 27.96 Outstanding at September 30, 2019 320,287 $ 27.21 8 $ 3,136 Exercisable at at September 30, 2019 27,620 $ 17.17 1.4 $ 547
Schedule of miscellaneous information related to stock options	The table below presents other information regarding stock options. Year ended September 30, 2019 2018 2017 (In thousands, except grant date fair value per stock option) Compensation cost for stock options $ 521 $ — $ — Weighted average grant date fair value per stock option 5.21 3.15 3.06 Total intrinsic value of options exercised 414 908 2,605 Grant date fair value of options exercised 51 285 1,328 Cash received from option exercises 298 1,338 7,238
Summary of nonvested activity	The following is a summary of activity related to unvested stock options. Year ended September 30, 2019 2018 2017 Non-vested Stock Options Options Outstanding Weighted Options Outstanding Weighted Options Outstanding Weighted Outstanding at beginning of period — $ — — $ — — $ — Granted 356,343 5.33 — — — — Vested — — — — — — Forfeited (63,176 ) 5.33 — — — — Outstanding at end of period 293,167 $ 5.33 — $ — — $ — The following table summarizes information about unvested restricted stock activity. Year ended September 30, 2019 2018 2017 Non-vested Restricted Stock Outstanding Weighted Outstanding Weighted Outstanding Weighted Outstanding at beginning of period 460,999 $ 22.52 466,681 $ 18.56 490,363 $ 16.00 Granted 249,272 21.41 205,100 $ 26.11 238,450 18.89 Vested (159,103 ) 26.09 (198,620 ) 16.65 (116,878 ) 20.95 Forfeited (115,330 ) 10.61 (12,162 ) 27.00 (145,254 ) 8.56 Outstanding at end of period 435,838 $ 23.73 460,999 $ 22.52 466,681 $ 18.56

Shareholders' Equity (Tables)

Shareholders' Equity (Tables)	12 Months Ended
	Sep. 30, 2019
Equity [Abstract]
Schedule of compliance with regulatory capital requirements	To be categorized as well capitalized, the Bank must maintain minimum Common Equity Tier 1, Tier 1 risk-based, Total 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 Capital Ratio Ratio Ratio September 30, 2019 (In thousands) Common Equity Tier 1 risk-based capital ratio: The Company $ 1,710,147 14.30 % 4.50 % NA The Bank 1,666,426 13.93 4.50 6.50 % Tier 1 risk-based capital ratio: The Company 1,710,147 14.30 6.00 NA The Bank 1,666,426 13.93 6.00 8.00 Total risk-based capital ratio: The Company 1,848,581 15.45 8.00 NA The Bank 1,804,860 15.09 8.00 10.00 Tier 1 leverage ratio: The Company 1,710,147 10.51 4.00 NA The Bank 1,666,426 10.24 4.00 5.00 September 30, 2018 Common Equity Tier 1 risk-based capital ratio: The Company $ 1,678,475 14.71 % 4.50 % NA The Bank 1,661,628 14.55 4.50 6.50 % Tier 1 risk-based capital ratio: The Company 1,678,475 14.71 6.00 NA The Bank 1,661,628 14.55 6.00 8.00 Total risk-based capital ratio: The Company 1,814,981 15.91 8.00 NA The Bank 1,798,135 15.75 8.00 10.00 Tier 1 leverage ratio: The Company 1,678,475 10.85 4.00 NA The Bank 1,661,628 10.74 4.00 5.00
Schedule of earnings per share calculation	The following table sets forth information regarding earnings per share calculations. Year ended September 30, 2019 2018 2017 Weighted average shares outstanding 80,471,316 85,008,040 88,905,457 Weighted average dilutive warrants 4,448 63,079 242,979 Weighted average dilutive options 19,399 38,724 75,771 Weighted average diluted shares 80,495,163 85,109,843 89,224,207 Net income (In thousands) $ 210,256 $ 203,850 $ 173,532 Basic EPS $ 2.61 $ 2.40 $ 1.95 Diluted EPS 2.61 2.40 1.94

Financial Information - Washi_2

Financial Information - Washington Federal, Inc. (Tables)	12 Months Ended
	Sep. 30, 2019
Condensed Financial Information Disclosure [Abstract]
Schedule of condensed financial information of parent company	The following Washington Federal, Inc. (parent company only) financial information should be read in conjunction with the other notes to the Consolidated Financial Statements. Condensed Statements of Financial Condition September 30, 2019 September 30, 2018 (In thousands) Assets Cash $ 38,721 $ 20,334 Other assets 5,000 — Investment in subsidiary 1,989,274 1,980,062 Total assets $ 2,032,995 $ 2,000,396 Liabilities Other liabilities $ — $ 3,488 Total liabilities — 3,488 Shareholders’ equity Total shareholders’ equity 2,032,995 1,996,908 Total liabilities and shareholders’ equity $ 2,032,995 $ 2,000,396 Condensed Statements of Operations Twelve Months Ended September 30, 2019 2018 2017 (In thousands) Income Dividends from subsidiary $ 208,389 $ 198,294 $ 171,500 Total Income 208,389 198,294 171,500 Expense Miscellaneous expense 448 439 435 Total expense 448 439 435 Net income (loss) before equity in undistributed net income (loss) of subsidiary 207,941 197,855 171,065 Equity in undistributed net income (loss) of subsidiaries 2,213 5,880 2,326 Income before income taxes 210,154 203,735 173,391 Income tax benefit (expense) 102 115 141 Net income $ 210,256 $ 203,850 $ 173,532 Condensed Statements of Cash Flows Twelve Months Ended September 30, 2019 2018 2017 (In thousands) Cash Flows From Operating Activities Net income $ 210,256 $ 203,850 $ 173,532 Adjustments to reconcile net income to net cash provided by operating activities: Equity in undistributed net income (loss) of subsidiaries (2,213 ) (5,880 ) (2,326 ) Stock based compensation expense 5,265 4,771 5,910 Decrease (increase) in other assets — — 15 Increase (decrease) in other liabilities (3,489 ) 3,424 (2,699 ) Net cash provided by (used in) operating activities 209,819 206,165 174,432 Cash Flows From Investing Activities Purchase of strategic investments (5,000 ) — — Net cash provided by (used in) investing activities (5,000 ) — — Cash Flows From Financing Activities Proceeds from exercise of common stock options and related tax benefit 740 1,338 7,238 Treasury stock purchased (123,854 ) (164,249 ) (98,374 ) Dividends paid on common stock (63,318 ) (55,997 ) (74,519 ) Net cash provided by (used in) financing activities (186,432 ) (218,908 ) (165,655 ) Increase (decrease) in cash 18,387 (12,743 ) 8,777 Cash at beginning of year 20,334 33,077 24,300 Cash at end of year $ 38,721 $ 20,334 $ 33,077

Selected Quarterly Financial _2

Selected Quarterly Financial Data (Unaudited) (Tables)	12 Months Ended
	Sep. 30, 2019
Quarterly Financial Information Disclosure [Abstract]
Summary of unaudited interim results of operations by quarter	The following is a summary of the unaudited interim results of operations by quarter for the years presented. Twelve Months Ended September 30, 2019 First Quarter Second Quarter Third Quarter Fourth Quarter (In thousands, except per share data) Interest income $ 162,622 $ 167,582 $ 171,826 $ 169,436 Interest expense 43,470 47,512 50,160 49,264 Net interest income 119,152 120,070 121,666 120,172 Provision (release) for loan losses (500 ) 750 — (1,900 ) Other operating income (including REO gain (loss), net) 19,329 13,618 14,395 15,786 Other operating expense 71,672 67,967 70,898 72,526 Income before income taxes 67,309 64,971 65,163 65,332 Income tax expense 14,367 13,873 11,309 12,970 Net income $ 52,942 $ 51,098 $ 53,854 $ 52,362 Basic earnings per share $ 0.65 $ 0.63 $ 0.67 $ 0.66 Diluted earnings per share 0.65 0.63 0.67 0.66 Cash dividends paid per share 0.18 0.20 0.20 0.21 Twelve Months Ended September 30, 2018 First Quarter Second Quarter Third Quarter Fourth Quarter (In thousands, except per share data) Interest income $ 145,780 $ 149,079 $ 155,072 $ 157,152 Interest expense 30,045 31,778 35,220 37,901 Net interest income 115,735 117,301 119,852 119,251 Provision (release) for loan losses — (950 ) 1,000 (5,500 ) Other operating income (including REO gain (loss), net) 6,841 12,309 12,619 12,207 Other operating expense 61,941 65,787 66,977 69,617 Income before income taxes 60,635 64,773 64,494 67,341 Income tax expense 8,965 15,502 13,100 15,826 Net income $ 51,670 $ 49,271 $ 51,394 $ 51,515 Basic earnings per share $ 0.59 $ 0.58 $ 0.61 $ 0.62 Diluted earnings per share 0.59 0.57 0.61 0.62 Cash dividends paid per share 0.15 0.17 0.17 0.18

Summary of Significant Accoun_4

Summary of Significant Accounting Policies - Narrative (Details) $ / shares in Units, $ in Thousands	Oct. 29, 2019$ / shares	Sep. 30, 2019USD ($)paymentsegmentpartbranch	Sep. 30, 2018USD ($)
Summary of Significant Accounting Policies [Line Items]
Number of offices | branch		234
Cash collateral		$ 31,850	$ 18,000
Loans in process		$ 1,201,341	1,195,506
Days past grace period to initiate contact to cure deficiency		30 days
Minimum days past due to begin foreclosure proceedings		90 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
Number of payments required | payment		6
Number of parts in loss percentage factor | part		2
Options exercisable, weighted average remaining contractual term (in years)		1 year 4 months 24 days
Number of reportable business segments | segment		1
Subsequent Event
Summary of Significant Accounting Policies [Line Items]
Dividends declared (in dollars per share) | $ / shares	$ 0.21
Minimum
Summary of Significant Accounting Policies [Line Items]
Term for payment and rate reduction		6 months
Award vesting period (in years)		3 years
Maximum
Summary of Significant Accounting Policies [Line Items]
Term for payment and rate reduction		12 months
Award vesting period (in years)		5 years
Options exercisable, weighted average remaining contractual term (in years)		10 years
Stock Options and Restricted Stock | Minimum
Summary of Significant Accounting Policies [Line Items]
Award vesting period (in years)		2 years
Stock Options and Restricted Stock | Maximum
Summary of Significant Accounting Policies [Line Items]
Award vesting period (in years)		5 years
Loans and Leases Receivable
Summary of Significant Accounting Policies [Line Items]
Loans in process		$ 2,379,089	$ 2,180,162

Summary of Significant Accoun_5

Summary of Significant Accounting Policies - Intangible Assets (Details) - USD ($) $ in Thousands	12 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Goodwill
Goodwill, beginning of period	$ 301,368	$ 293,153
Additions	0	8,215
Goodwill, end of period	301,368	301,368
Core Deposit and Other Intangibles
Intangible assets, beginning of period	9,918	5,529
Additions	0	6,595
Amortization	(2,039)	(2,206)
Intangible assets, end of period	7,879	9,918
Total
Goodwill and intangible assets, beginning of period	311,286	298,682
Additions	0	14,810
Amortization	(2,039)	(2,206)
Goodwill and intangible assets, end of period	309,247	311,286
Increase in goodwill	301,368	293,153	$ 301,368	$ 301,368
Increase in finite-lived intangible assets	9,918	5,529	7,879	9,918
Decrease in other assets			210,989	196,494
Amortization expense for intangible assets	2,039	2,206
Finite-Lived Intangible Assets, Net, Amortization Expense, Fiscal Year Maturity [Abstract]
2020			1,984
2021			1,140
2022			804
2023			775
2024			$ 755
Restatement Adjustment | Acquisition of Businesses in Prior Years
Goodwill
Goodwill, beginning of period	7,135
Goodwill, end of period		7,135
Core Deposit and Other Intangibles
Intangible assets, beginning of period	5,106
Amortization		(1,500)
Intangible assets, end of period		5,106
Total
Amortization		(1,500)
Increase in goodwill	7,135	7,135		7,135
Increase in finite-lived intangible assets	$ 5,106	5,106		5,106
Decrease in other assets				$ (12,241)
Amortization expense for intangible assets		$ 1,500

Investment Securities - Investm

Investment Securities - Investments by Contractual Maturity Date (Details) - USD ($) $ in Thousands	Sep. 30, 2019	Sep. 30, 2018
Amortized Cost, Available-for-sale securities
Amortized cost	$ 1,458,071	$ 1,326,471
Gross Unrealized Gains / Losses, Available-for-sale securities
Gross unrealized gains	30,461	4,685
Gross unrealized loss	(2,790)	(16,199)
Fair Value, Available-for-sale securities
Fair value	$ 1,485,742	$ 1,314,957
Yield, Available-for-sale securities
Yield	3.27%	3.30%
Amortized Cost, Held-to-maturity securities
Amortized cost	$ 1,443,480	$ 1,625,420
Gross Unrealized Gains / Losses, Held-to-maturity securities
Gross unrealized gains	19,952	333
Gross unrealized losses	(337)	(76,983)
Fair Value, Held-to-maturity securities
Fair value	$ 1,463,095	1,548,770
Yield, Held-to-maturity securities
Yield	3.15%
Investments	$ 2,901,551	2,951,891
Gross unrealized gains on investments	50,413	5,018
Gross unrealized losses on investments	(3,127)	(93,182)
Total Financial Assets	$ 2,948,837	$ 2,863,727
Yield on investments	3.21%	3.22%
U.S. government and agency securities
Amortized Cost, Available-for-sale securities
5 to 10 years	$ 65,287	$ 60,872
Over 10 years	207,067	148,099
Gross Unrealized Gains / Losses, Available-for-sale securities
Gross unrealized gains, 5 to 10 years	39	0
Gross unrealized gains, over 10 years	1	109
Gross unrealized losses, 5 to 10 years	(629)	(1,473)
Gross unrealized losses, over 10 years	(987)	(314)
Fair Value, Available-for-sale securities
5 to 10 years	64,697	59,399
Over 10 years	$ 206,081	$ 147,894
Yield, Available-for-sale securities
5 to 10 years	2.43%	2.55%
Over 10 years	3.02%	3.05%
Equity securities
Amortized Cost, Available-for-sale securities
1 to 5 years		$ 500
Gross Unrealized Gains / Losses, Available-for-sale securities
Gross unrealized gains, 1 to 5 years		0
Gross unrealized losses, 1 to 5 years		(12)
Fair Value, Available-for-sale securities
1 to 5 years		$ 488
Yield, Available-for-sale securities
1 to 5 years		1.80%
Corporate debt securities
Amortized Cost, Available-for-sale securities
Within 1 year	$ 43,903
1 to 5 years	70,000	$ 113,762
5 to 10 years	92,931	69,965
Gross Unrealized Gains / Losses, Available-for-sale securities
Gross unrealized gains, within 1 year	411
Gross unrealized gains, 1 to 5 years	689	1,875
Gross unrealized gains, 5 to 10 years	1,879	35
Gross unrealized losses, within 1 year	0
Gross unrealized losses, 1 to 5 years	(50)	(13)
Gross unrealized losses, 5 to 10 years	0	(929)
Fair Value, Available-for-sale securities
Within 1 year	44,314
1 to 5 years	70,639	115,624
5 to 10 years	$ 94,810	$ 69,071
Yield, Available-for-sale securities
Within 1 year	3.65%
1 to 5 years	3.29%	3.59%
5 to 10 years	3.27%	3.23%
Municipal bonds
Amortized Cost, Available-for-sale securities
1 to 5 years	$ 1,430	$ 1,398
Over 10 years	20,303	20,323
Gross Unrealized Gains / Losses, Available-for-sale securities
Gross unrealized gains, 1 to 5 years	14	0
Gross unrealized gains, over 10 years	895	1,281
Gross unrealized losses, 1 to 5 years	0	(24)
Gross unrealized losses, over 10 years	0	0
Fair Value, Available-for-sale securities
1 to 5 years	1,444	1,374
Over 10 years	$ 21,198	$ 21,604
Yield, Available-for-sale securities
1 to 5 years	1.94%	2.05%
Over 10 years	6.45%	6.45%
Agency pass-through certificates
Amortized Cost, Available-for-sale securities
Without single maturity date	$ 957,150	$ 908,092
Gross Unrealized Gains / Losses, Available-for-sale securities
Gross unrealized gains, without single maturity date	26,533	1,383
Gross unrealized losses, without single maturity date	(1,124)	(13,434)
Fair Value, Available-for-sale securities
Without single maturity date	$ 982,559	$ 896,041
Yield, Available-for-sale securities
Without single maturity date	3.29%	3.29%
Amortized Cost, Held-to-maturity securities
Without single maturity date	$ 1,428,480	$ 1,610,420
Gross Unrealized Gains / Losses, Held-to-maturity securities
Gross unrealized gains, without single maturity date	19,945	305
Gross unrealized losses, without single maturity date	(337)	(76,983)
Fair Value, Held-to-maturity securities
Without single maturity date	$ 1,448,088	$ 1,533,742
Yield, Held-to-maturity securities
Without single maturity date	3.15%	3.16%
Commercial MBS
Amortized Cost, Available-for-sale securities
Without single maturity date		$ 3,460
Gross Unrealized Gains / Losses, Available-for-sale securities
Gross unrealized gains, without single maturity date		2
Gross unrealized losses, without single maturity date		0
Fair Value, Available-for-sale securities
Without single maturity date		$ 3,462
Yield, Available-for-sale securities
Without single maturity date		4.36%
Amortized Cost, Held-to-maturity securities
Without single maturity date	$ 15,000	$ 15,000
Gross Unrealized Gains / Losses, Held-to-maturity securities
Gross unrealized gains, without single maturity date	7	28
Gross unrealized losses, without single maturity date	0	0
Fair Value, Held-to-maturity securities
Without single maturity date	$ 15,007	$ 15,028
Yield, Held-to-maturity securities
Without single maturity date	2.89%	3.03%

Investment Securities - Narrati

Investment Securities - Narrative (Details) - USD ($) $ in Thousands	12 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2017
Investments, Debt and Equity Securities [Abstract]
Available-for-sale securities purchased	$ 358,709	$ 272,780	$ 76,367
Payments to acquire held-to-maturity securities	0	170,836	466,058
Proceeds from sales of available-for-sale investment securities	491	$ 0	$ 362,829
Proceeds from sale of held-to-maturity securities	$ 0
Term of contractual due dates (in years)	25 years

Investment Securities - Securit

Investment Securities - Securities in Continuous Loss Position (Details) - USD ($) $ in Thousands	Sep. 30, 2019	Sep. 30, 2018
Debt Securities, Available-for-sale [Line Items]
Less than 12 months, unrealized gross losses	$ (804)	$ (29,854)
Less than 12 months, fair value	240,610	1,124,253
12 months or more, unrealized gross losses	(2,323)	(63,328)
12 months or more, fair value	373,143	1,284,504
Total, unrealized gross losses	(3,127)	(93,182)
Total, fair value	613,753	2,408,757
Corporate debt securities
Debt Securities, Available-for-sale [Line Items]
Less than 12 months, unrealized gross losses	0	(929)
Less than 12 months, fair value	0	49,072
12 months or more, unrealized gross losses	(50)	(14)
12 months or more, fair value	24,950	24,988
Total, unrealized gross losses	(50)	(943)
Total, fair value	24,950	74,060
Municipal bonds
Debt Securities, Available-for-sale [Line Items]
Less than 12 months, unrealized gross losses		(24)
Less than 12 months, fair value		1,374
12 months or more, unrealized gross losses		0
12 months or more, fair value		0
Total, unrealized gross losses		(24)
Total, fair value		1,374
U.S. government and agency securities
Debt Securities, Available-for-sale [Line Items]
Less than 12 months, unrealized gross losses	(656)	(141)
Less than 12 months, fair value	152,715	37,565
12 months or more, unrealized gross losses	(960)	(1,645)
12 months or more, fair value	77,391	76,499
Total, unrealized gross losses	(1,616)	(1,786)
Total, fair value	230,106	114,064
Equity securities
Debt Securities, Available-for-sale [Line Items]
Less than 12 months, unrealized gross losses		(12)
Less than 12 months, fair value		488
12 months or more, unrealized gross losses		0
12 months or more, fair value		0
Total, unrealized gross losses		(12)
Total, fair value		488
Mortgage-backed securities
Debt Securities, Available-for-sale [Line Items]
Less than 12 months, unrealized gross losses	(148)	(28,748)
Less than 12 months, fair value	87,895	1,035,754
12 months or more, unrealized gross losses	(1,313)	(61,669)
12 months or more, fair value	270,802	1,183,017
Total, unrealized gross losses	(1,461)	(90,417)
Total, fair value	$ 358,697	$ 2,218,771

Loans Receivable - Schedule of

Loans Receivable - Schedule of Loans Receivable (including Covered Loans) (Details) - USD ($) $ in Thousands	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2017
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans receivable, gross	$ 13,312,388	$ 12,853,678
Ratio of type of loan to total loans receivable	100.00%	100.00%
Allowance for probable losses	$ 131,534	$ 129,257	$ 123,073
Loans in process	1,201,341	1,195,506
Net deferred fees, costs and discounts	48,938	51,834
Total loan contra accounts	1,381,813	1,376,597
Net loans	11,930,575	11,477,081
Single-family residential
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans receivable, gross	$ 5,835,194	$ 5,798,966
Ratio of type of loan to total loans receivable	43.80%	45.10%
Allowance for probable losses	$ 30,988	$ 33,033	36,892
Construction
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans receivable, gross	$ 2,038,052	$ 1,890,668
Ratio of type of loan to total loans receivable	15.30%	14.70%
Allowance for probable losses	$ 32,304	$ 31,317	24,556
Construction - custom
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans receivable, gross	$ 540,741	$ 624,479
Ratio of type of loan to total loans receivable	4.10%	4.90%
Allowance for probable losses	$ 1,369	$ 1,842	1,944
Land - acquisition & development
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans receivable, gross	$ 204,107	$ 155,204
Ratio of type of loan to total loans receivable	1.50%	1.20%
Allowance for probable losses	$ 9,155	$ 7,978	6,829
Land - consumer lot loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans receivable, gross	$ 99,694	$ 102,036
Ratio of type of loan to total loans receivable	0.70%	0.80%
Allowance for probable losses	$ 2,143	$ 2,164	2,649
Multi-family
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans receivable, gross	$ 1,422,674	$ 1,385,125
Ratio of type of loan to total loans receivable	10.70%	10.80%
Allowance for probable losses	$ 7,391	$ 8,329	7,862
Commercial real estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans receivable, gross	$ 1,631,170	$ 1,452,168
Ratio of type of loan to total loans receivable	12.30%	11.30%
Allowance for probable losses	$ 13,170	$ 11,852	11,818
Commercial & industrial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans receivable, gross	$ 1,268,695	$ 1,140,874
Ratio of type of loan to total loans receivable	9.50%	8.90%
Allowance for probable losses	$ 31,450	$ 28,702	28,524
HELOC
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans receivable, gross	$ 142,178	$ 130,852
Ratio of type of loan to total loans receivable	1.10%	1.00%
Allowance for probable losses	$ 1,103	$ 781	855
Consumer
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans receivable, gross	$ 129,883	$ 173,306
Ratio of type of loan to total loans receivable	1.00%	1.30%
Allowance for probable losses	$ 2,461	$ 3,259	$ 1,144

Loans Receivable - Interest Rat

Loans Receivable - Interest Rate Terms (Details) $ in Thousands	Sep. 30, 2019USD ($)
Accounts, Notes, Loans and Financing Receivable [Line Items]
Gross loans, fixed-rate	$ 8,047,602
% of gross loans, fixed-rate	60.50%
Gross loans, adjustable rate	$ 5,264,786
% of gross loans, adjustable rate	39.50%
Within 1 year
Accounts, Notes, Loans and Financing Receivable [Line Items]
Gross loans, fixed-rate	$ 135,426
% of gross loans, fixed-rate	1.00%
Gross loans, adjustable rate	$ 4,056,238
% of gross loans, adjustable rate	30.50%
1 to 3 years
Accounts, Notes, Loans and Financing Receivable [Line Items]
Gross loans, fixed-rate	$ 416,285
% of gross loans, fixed-rate	3.10%
Gross loans, adjustable rate	$ 558,197
% of gross loans, adjustable rate	4.20%
3 to 5 years
Accounts, Notes, Loans and Financing Receivable [Line Items]
Gross loans, fixed-rate	$ 341,838
% of gross loans, fixed-rate	2.60%
Gross loans, adjustable rate	$ 489,151
% of gross loans, adjustable rate	3.70%
5 to 10 years
Accounts, Notes, Loans and Financing Receivable [Line Items]
Gross loans, fixed-rate	$ 993,685
% of gross loans, fixed-rate	7.50%
Gross loans, adjustable rate	$ 110,934
% of gross loans, adjustable rate	0.80%
10 to 20 years
Accounts, Notes, Loans and Financing Receivable [Line Items]
Gross loans, fixed-rate	$ 1,059,127
% of gross loans, fixed-rate	8.00%
Gross loans, adjustable rate	$ 32,242
% of gross loans, adjustable rate	0.20%
Over 20 years
Accounts, Notes, Loans and Financing Receivable [Line Items]
Gross loans, fixed-rate	$ 5,101,241
% of gross loans, fixed-rate	38.30%
Gross loans, adjustable rate	$ 18,024
% of gross loans, adjustable rate	0.10%

Loans Receivable - Loans Receiv

Loans Receivable - Loans Receivable by Geographic Location (Details) - USD ($) $ in Thousands	Sep. 30, 2019	Sep. 30, 2018
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans receivable, gross	$ 13,312,388	$ 12,853,678
Ratio of loans by geographic location to total loans	100.00%
Washington
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans receivable, gross	$ 5,644,617
Ratio of loans by geographic location to total loans	42.70%
Oregon
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans receivable, gross	$ 2,202,488
Ratio of loans by geographic location to total loans	16.60%
Arizona
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans receivable, gross	$ 1,595,998
Ratio of loans by geographic location to total loans	11.90%
Utah
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans receivable, gross	$ 1,003,904
Ratio of loans by geographic location to total loans	7.50%
Texas
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans receivable, gross	$ 1,001,887
Ratio of loans by geographic location to total loans	7.40%
New Mexico
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans receivable, gross	$ 723,067
Ratio of loans by geographic location to total loans	5.30%
Idaho
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans receivable, gross	$ 637,380
Ratio of loans by geographic location to total loans	4.80%
Nevada
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans receivable, gross	$ 288,653
Ratio of loans by geographic location to total loans	2.10%
Other
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans receivable, gross	$ 214,394
Ratio of loans by geographic location to total loans	1.70%
Single-family residential
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans receivable, gross	$ 5,835,194	5,798,966
Ratio of loans by geographic location to total loans	43.80%
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	$ 3,125,058
Ratio of loans by geographic location to total loans	23.50%
Percentage of loans by geographic area as a percentage of loan type	53.60%
Single-family residential | Oregon
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans receivable, gross	$ 694,577
Ratio of loans by geographic location to total loans	5.20%
Percentage of loans by geographic area as a percentage of loan type	11.90%
Single-family residential | Arizona
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans receivable, gross	$ 575,256
Ratio of loans by geographic location to total loans	4.30%
Percentage of loans by geographic area as a percentage of loan type	9.90%
Single-family residential | Utah
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans receivable, gross	$ 527,142
Ratio of loans by geographic location to total loans	4.00%
Percentage of loans by geographic area as a percentage of loan type	9.00%
Single-family residential | Texas
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans receivable, gross	$ 161,616
Ratio of loans by geographic location to total loans	1.20%
Percentage of loans by geographic area as a percentage of loan type	2.80%
Single-family residential | New Mexico
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans receivable, gross	$ 205,559
Ratio of loans by geographic location to total loans	1.50%
Percentage of loans by geographic area as a percentage of loan type	3.50%
Single-family residential | Idaho
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans receivable, gross	$ 321,184
Ratio of loans by geographic location to total loans	2.40%
Percentage of loans by geographic area as a percentage of loan type	5.50%
Single-family residential | Nevada
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans receivable, gross	$ 190,941
Ratio of loans by geographic location to total loans	1.40%
Percentage of loans by geographic area as a percentage of loan type	3.30%
Single-family residential | Other
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans receivable, gross	$ 33,861
Ratio of loans by geographic location to total loans	0.30%
Percentage of loans by geographic area as a percentage of loan type	0.60%
Multi-family
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans receivable, gross	$ 1,422,674	1,385,125
Ratio of loans by geographic location to total loans	10.70%
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	$ 351,771
Ratio of loans by geographic location to total loans	2.70%
Percentage of loans by geographic area as a percentage of loan type	24.70%
Multi-family | Oregon
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans receivable, gross	$ 353,388
Ratio of loans by geographic location to total loans	2.70%
Percentage of loans by geographic area as a percentage of loan type	24.80%
Multi-family | Arizona
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans receivable, gross	$ 331,088
Ratio of loans by geographic location to total loans	2.50%
Percentage of loans by geographic area as a percentage of loan type	23.30%
Multi-family | Utah
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans receivable, gross	$ 58,865
Ratio of loans by geographic location to total loans	0.40%
Percentage of loans by geographic area as a percentage of loan type	4.10%
Multi-family | Texas
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans receivable, gross	$ 82,598
Ratio of loans by geographic location to total loans	0.60%
Percentage of loans by geographic area as a percentage of loan type	5.80%
Multi-family | New Mexico
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans receivable, gross	$ 174,485
Ratio of loans by geographic location to total loans	1.30%
Percentage of loans by geographic area as a percentage of loan type	12.30%
Multi-family | Idaho
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans receivable, gross	$ 43,446
Ratio of loans by geographic location to total loans	0.30%
Percentage of loans by geographic area as a percentage of loan type	3.10%
Multi-family | Nevada
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans receivable, gross	$ 26,837
Ratio of loans by geographic location to total loans	0.20%
Percentage of loans by geographic area as a percentage of loan type	1.90%
Multi-family | Other
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans receivable, gross	$ 196
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
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans receivable, gross	$ 204,107	155,204
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 - acquisition & development | Washington
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans receivable, gross	$ 82,891
Ratio of loans by geographic location to total loans	0.70%
Percentage of loans by geographic area as a percentage of loan type	40.60%
Land - acquisition & development | Oregon
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans receivable, gross	$ 50,195
Ratio of loans by geographic location to total loans	0.40%
Percentage of loans by geographic area as a percentage of loan type	24.60%
Land - acquisition & development | Arizona
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans receivable, gross	$ 18,871
Ratio of loans by geographic location to total loans	0.10%
Percentage of loans by geographic area as a percentage of loan type	9.20%
Land - acquisition & development | Utah
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 - acquisition & development | Texas
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans receivable, gross	$ 2,936
Ratio of loans by geographic location to total loans	0.00%
Percentage of loans by geographic area as a percentage of loan type	1.40%
Land - acquisition & development | New Mexico
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans receivable, gross	$ 32,443
Ratio of loans by geographic location to total loans	0.20%
Percentage of loans by geographic area as a percentage of loan type	15.90%
Land - acquisition & development | Idaho
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans receivable, gross	$ 16,771
Ratio of loans by geographic location to total loans	0.10%
Percentage of loans by geographic area as a percentage of loan type	8.20%
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 - acquisition & development | Other
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans receivable, gross	$ 0
Ratio of loans by geographic location to total loans	0.00%
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	$ 99,694	102,036
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%
Land - consumer lot loans | Washington
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans receivable, gross	$ 61,534
Ratio of loans by geographic location to total loans	0.50%
Percentage of loans by geographic area as a percentage of loan type	61.70%
Land - consumer lot loans | Oregon
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans receivable, gross	$ 13,228
Ratio of loans by geographic location to total loans	0.10%
Percentage of loans by geographic area as a percentage of loan type	13.30%
Land - consumer lot loans | Arizona
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans receivable, gross	$ 10,990
Ratio of loans by geographic location to total loans	0.10%
Percentage of loans by geographic area as a percentage of loan type	11.00%
Land - consumer lot loans | Utah
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans receivable, gross	$ 4,116
Ratio of loans by geographic location to total loans	0.00%
Percentage of loans by geographic area as a percentage of loan type	4.10%
Land - consumer lot loans | Texas
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans receivable, gross	$ 416
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 - consumer lot loans | New Mexico
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans receivable, gross	$ 2,049
Ratio of loans by geographic location to total loans	0.00%
Percentage of loans by geographic area as a percentage of loan type	2.10%
Land - consumer lot loans | Idaho
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans receivable, gross	$ 4,658
Ratio of loans by geographic location to total loans	0.00%
Percentage of loans by geographic area as a percentage of loan type	4.70%
Land - consumer lot loans | Nevada
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans receivable, gross	$ 2,694
Ratio of loans by geographic location to total loans	0.00%
Percentage of loans by geographic area as a percentage of loan type	2.70%
Land - consumer lot loans | Other
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans receivable, gross	$ 9
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
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans receivable, gross	$ 540,741	624,479
Ratio of loans by geographic location to total loans	4.10%
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	$ 315,615
Ratio of loans by geographic location to total loans	2.50%
Percentage of loans by geographic area as a percentage of loan type	58.40%
Construction - custom | Oregon
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans receivable, gross	$ 61,699
Ratio of loans by geographic location to total loans	0.50%
Percentage of loans by geographic area as a percentage of loan type	11.40%
Construction - custom | Arizona
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans receivable, gross	$ 58,550
Ratio of loans by geographic location to total loans	0.40%
Percentage of loans by geographic area as a percentage of loan type	10.80%
Construction - custom | Utah
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans receivable, gross	$ 45,277
Ratio of loans by geographic location to total loans	0.30%
Percentage of loans by geographic area as a percentage of loan type	8.40%
Construction - custom | Texas
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans receivable, gross	$ 1,889
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%
Construction - custom | New Mexico
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans receivable, gross	$ 17,775
Ratio of loans by geographic location to total loans	0.10%
Percentage of loans by geographic area as a percentage of loan type	3.30%
Construction - custom | Idaho
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans receivable, gross	$ 27,499
Ratio of loans by geographic location to total loans	0.20%
Percentage of loans by geographic area as a percentage of loan type	5.10%
Construction - custom | Nevada
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans receivable, gross	$ 12,437
Ratio of loans by geographic location to total loans	0.10%
Percentage of loans by geographic area as a percentage of loan type	2.30%
Construction - custom | Other
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans receivable, gross	$ 0
Ratio of loans by geographic location to total loans	0.00%
Percentage of loans by geographic area as a percentage of loan type	0.00%
Construction
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans receivable, gross	$ 2,038,052	1,890,668
Ratio of loans by geographic location to total loans	15.30%
Percentage of loans by geographic area as a percentage of loan type	100.00%
Construction | Washington
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans receivable, gross	$ 482,453
Ratio of loans by geographic location to total loans	3.60%
Percentage of loans by geographic area as a percentage of loan type	23.70%
Construction | Oregon
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans receivable, gross	$ 430,749
Ratio of loans by geographic location to total loans	3.20%
Percentage of loans by geographic area as a percentage of loan type	21.10%
Construction | Arizona
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans receivable, gross	$ 262,400
Ratio of loans by geographic location to total loans	2.00%
Percentage of loans by geographic area as a percentage of loan type	12.90%
Construction | Utah
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans receivable, gross	$ 246,097
Ratio of loans by geographic location to total loans	1.80%
Percentage of loans by geographic area as a percentage of loan type	12.10%
Construction | Texas
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans receivable, gross	$ 420,627
Ratio of loans by geographic location to total loans	3.20%
Percentage of loans by geographic area as a percentage of loan type	20.60%
Construction | New Mexico
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans receivable, gross	$ 68,120
Ratio of loans by geographic location to total loans	0.50%
Percentage of loans by geographic area as a percentage of loan type	3.30%
Construction | Idaho
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans receivable, gross	$ 88,956
Ratio of loans by geographic location to total loans	0.70%
Percentage of loans by geographic area as a percentage of loan type	4.40%
Construction | 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%
Construction | Other
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans receivable, gross	$ 38,650
Ratio of loans by geographic location to total loans	0.30%
Percentage of loans by geographic area as a percentage of loan type	1.90%
Commercial real estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans receivable, gross	$ 1,631,170	1,452,168
Ratio of loans by geographic location to total loans	12.30%
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	$ 530,165
Ratio of loans by geographic location to total loans	4.10%
Percentage of loans by geographic area as a percentage of loan type	32.50%
Commercial real estate | Oregon
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans receivable, gross	$ 294,574
Ratio of loans by geographic location to total loans	2.20%
Percentage of loans by geographic area as a percentage of loan type	18.10%
Commercial real estate | Arizona
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans receivable, gross	$ 246,041
Ratio of loans by geographic location to total loans	1.80%
Percentage of loans by geographic area as a percentage of loan type	15.10%
Commercial real estate | Utah
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans receivable, gross	$ 74,454
Ratio of loans by geographic location to total loans	0.60%
Percentage of loans by geographic area as a percentage of loan type	4.60%
Commercial real estate | Texas
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans receivable, gross	$ 165,692
Ratio of loans by geographic location to total loans	1.20%
Percentage of loans by geographic area as a percentage of loan type	10.20%
Commercial real estate | New Mexico
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans receivable, gross	$ 194,621
Ratio of loans by geographic location to total loans	1.50%
Percentage of loans by geographic area as a percentage of loan type	11.90%
Commercial real estate | Idaho
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans receivable, gross	$ 91,725
Ratio of loans by geographic location to total loans	0.70%
Percentage of loans by geographic area as a percentage of loan type	5.60%
Commercial real estate | Nevada
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans receivable, gross	$ 32,094
Ratio of loans by geographic location to total loans	0.20%
Percentage of loans by geographic area as a percentage of loan type	2.00%
Commercial real estate | Other
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans receivable, gross	$ 1,804
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
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans receivable, gross	$ 1,268,695	1,140,874
Ratio of loans by geographic location to total loans	9.50%
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	$ 521,049
Ratio of loans by geographic location to total loans	3.80%
Percentage of loans by geographic area as a percentage of loan type	41.10%
Commercial & industrial | Oregon
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans receivable, gross	$ 287,922
Ratio of loans by geographic location to total loans	2.20%
Percentage of loans by geographic area as a percentage of loan type	22.70%
Commercial & industrial | Arizona
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans receivable, gross	$ 78,590
Ratio of loans by geographic location to total loans	0.60%
Percentage of loans by geographic area as a percentage of loan type	6.20%
Commercial & industrial | Utah
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans receivable, gross	$ 40,368
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%
Commercial & industrial | Texas
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans receivable, gross	$ 165,646
Ratio of loans by geographic location to total loans	1.20%
Percentage of loans by geographic area as a percentage of loan type	13.10%
Commercial & industrial | New Mexico
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans receivable, gross	$ 15,379
Ratio of loans by geographic location to total loans	0.10%
Percentage of loans by geographic area as a percentage of loan type	1.20%
Commercial & industrial | Idaho
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans receivable, gross	$ 34,125
Ratio of loans by geographic location to total loans	0.30%
Percentage of loans by geographic area as a percentage of loan type	2.70%
Commercial & industrial | Nevada
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans receivable, gross	$ 20,426
Ratio of loans by geographic location to total loans	0.20%
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	$ 105,190
Ratio of loans by geographic location to total loans	0.80%
Percentage of loans by geographic area as a percentage of loan type	8.30%
Consumer
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans receivable, gross	$ 129,883	173,306
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%
Consumer | Washington
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans receivable, gross	$ 90,263
Ratio of loans by geographic location to total loans	0.70%
Percentage of loans by geographic area as a percentage of loan type	69.50%
Consumer | Oregon
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans receivable, gross	$ 1,376
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%
Consumer | Arizona
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans receivable, gross	$ 1,642
Ratio of loans by geographic location to total loans	0.00%
Percentage of loans by geographic area as a percentage of loan type	1.30%
Consumer | Utah
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans receivable, gross	$ 127
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 | Texas
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans receivable, gross	$ 467
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%
Consumer | New Mexico
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans receivable, gross	$ 1,162
Ratio of loans by geographic location to total loans	0.00%
Percentage of loans by geographic area as a percentage of loan type	0.90%
Consumer | Idaho
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans receivable, gross	$ 84
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	$ 95
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 | Other
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans receivable, gross	$ 34,667
Ratio of loans by geographic location to total loans	0.30%
Percentage of loans by geographic area as a percentage of loan type	26.70%
HELOC
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans receivable, gross	$ 142,178	$ 130,852
Ratio of loans by geographic location to total loans	1.10%
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	$ 83,818
Ratio of loans by geographic location to total loans	0.60%
Percentage of loans by geographic area as a percentage of loan type	59.00%
HELOC | Oregon
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans receivable, gross	$ 14,780
Ratio of loans by geographic location to total loans	0.10%
Percentage of loans by geographic area as a percentage of loan type	10.40%
HELOC | Arizona
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans receivable, gross	$ 12,570
Ratio of loans by geographic location to total loans	0.10%
Percentage of loans by geographic area as a percentage of loan type	8.80%
HELOC | Utah
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans receivable, gross	$ 7,458
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%
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 | New Mexico
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans receivable, gross	$ 11,474
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%
HELOC | Idaho
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans receivable, gross	$ 8,932
Ratio of loans by geographic location to total loans	0.10%
Percentage of loans by geographic area as a percentage of loan type	6.30%
HELOC | Nevada
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans receivable, gross	$ 3,129
Ratio of loans by geographic location to total loans	0.00%
Percentage of loans by geographic area as a percentage of loan type	2.20%
HELOC | Other
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans receivable, gross	$ 17
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%

Loans Receivable - Additional I

Loans Receivable - Additional Information (Details) - USD ($) $ in Thousands	12 Months Ended
	Sep. 30, 2019	Sep. 30, 2018
Accounts, Notes, Loans and Financing Receivable [Line Items]
Ratio of total past due loans to total loans	0.29%	0.42%
Approximate rate reduction concession, minimum	1.00%
Approximate rate reduction concession, maximum	2.00%
TDRs included in impaired loans	$ 121,677	$ 156,858
Percent of restructured loans performing	95.90%
Single family residential loans as percentage of restructured loans	92.00%
Loans Receivable from Related Party Including Unfunded Loan Commitment
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans granted to officers, directors, and related interests	$ 76,288	$ 70,012
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	12 months

Loans Receivable - Loans Impair

Loans Receivable - Loans Impaired, Loan Commitments and Loans Serviced (Details) - USD ($) $ in Thousands	12 Months Ended
	Sep. 30, 2019	Sep. 30, 2018
Receivables [Abstract]
Recorded investment in impaired loans	$ 149,546	$ 199,545
TDRs included in impaired loans	121,677	156,858
Specific reserves on impaired loans	439	517
Average balance of impaired loans for year ended	175,187	228,398
Interest income from impaired loans for year ended	7,918	10,232
Outstanding fixed-rate origination commitments	357,247	400,426
Gross loans serviced for others	$ 102,282	$ 77,958

Loans Receivable - Loans on Non

Loans Receivable - Loans on Non-accrual Status (Details) - USD ($) $ in Thousands	Sep. 30, 2019	Sep. 30, 2018
Accounts, Notes, Loans and Financing Receivable [Line Items]
Nonaccrual loans by portfolio segment	$ 33,731	$ 55,686
Ratio of nonaccrual loan by portfolio segment to total loans on nonaccrual status	100.00%	100.00%
Non-accrual loans as % of total loans	0.28%	0.49%
Single-family residential
Accounts, Notes, Loans and Financing Receivable [Line Items]
Nonaccrual loans by portfolio segment	$ 25,271	$ 27,643
Ratio of nonaccrual loan by portfolio segment to total loans on nonaccrual status	74.90%	49.60%
Construction
Accounts, Notes, Loans and Financing Receivable [Line Items]
Nonaccrual loans by portfolio segment	$ 0	$ 2,427
Ratio of nonaccrual loan by portfolio segment to total loans on nonaccrual status	0.00%	4.40%
Land - acquisition & development
Accounts, Notes, Loans and Financing Receivable [Line Items]
Nonaccrual loans by portfolio segment	$ 169	$ 920
Ratio of nonaccrual loan by portfolio segment to total loans on nonaccrual status	0.50%	1.70%
Land - consumer lot loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Nonaccrual loans by portfolio segment	$ 246	$ 787
Ratio of nonaccrual loan by portfolio segment to total loans on nonaccrual status	0.70%	1.40%
Commercial real estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Nonaccrual loans by portfolio segment	$ 5,835	$ 8,971
Ratio of nonaccrual loan by portfolio segment to total loans on nonaccrual status	17.30%	16.10%
Commercial & industrial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Nonaccrual loans by portfolio segment	$ 1,292	$ 14,394
Ratio of nonaccrual loan by portfolio segment to total loans on nonaccrual status	3.80%	25.80%
HELOC
Accounts, Notes, Loans and Financing Receivable [Line Items]
Nonaccrual loans by portfolio segment	$ 907	$ 523
Ratio of nonaccrual loan by portfolio segment to total loans on nonaccrual status	2.70%	0.90%
Consumer
Accounts, Notes, Loans and Financing Receivable [Line Items]
Nonaccrual loans by portfolio segment	$ 11	$ 21
Ratio of nonaccrual loan by portfolio segment to total loans on nonaccrual status	0.00%	0.00%

Loans Receivable - Breakdown of

Loans Receivable - Breakdown of Delinquent Loans (Details) - USD ($) $ in Thousands	Sep. 30, 2019	Sep. 30, 2018
Accounts, Notes, Loans and Financing Receivable [Line Items]
Amount of loans net of loans in process	$ 12,111,047	$ 11,658,172
Current	12,075,677	11,608,959
Total delinquent	$ 35,370	$ 49,213
Ratio of total past due loans to total loans	0.29%	0.42%
Delinquency %, current	99.71%	99.58%
Delinquency %, past due	0.29%	0.42%
Single-family residential
Accounts, Notes, Loans and Financing Receivable [Line Items]
Amount of loans net of loans in process	$ 5,835,186	$ 5,798,353
Current	5,809,239	5,768,253
Total delinquent	$ 25,947	$ 30,100
Ratio of total past due loans to total loans	0.44%	0.52%
Construction
Accounts, Notes, Loans and Financing Receivable [Line Items]
Amount of loans net of loans in process	$ 1,164,889	$ 1,062,855
Current	1,164,889	1,060,428
Total delinquent	$ 0	$ 2,427
Ratio of total past due loans to total loans	0.00%	0.23%
Construction - custom
Accounts, Notes, Loans and Financing Receivable [Line Items]
Amount of loans net of loans in process	$ 255,505	$ 289,192
Current	255,505	289,192
Total delinquent	$ 0	$ 0
Ratio of total past due loans to total loans	0.00%	0.00%
Land - acquisition & development
Accounts, Notes, Loans and Financing Receivable [Line Items]
Amount of loans net of loans in process	$ 161,194	$ 123,560
Current	161,194	122,620
Total delinquent	$ 0	$ 940
Ratio of total past due loans to total loans	0.00%	0.76%
Land - consumer lot loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Amount of loans net of loans in process	$ 99,694	$ 101,908
Current	98,916	101,294
Total delinquent	$ 778	$ 614
Ratio of total past due loans to total loans	0.78%	0.60%
Multi-family
Accounts, Notes, Loans and Financing Receivable [Line Items]
Amount of loans net of loans in process	$ 1,422,652	$ 1,385,103
Current	1,422,652	1,385,103
Total delinquent	$ 0	$ 0
Ratio of total past due loans to total loans	0.00%	0.00%
Commercial real estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Amount of loans net of loans in process	$ 1,631,171	$ 1,452,169
Current	1,625,509	1,448,946
Total delinquent	$ 5,662	$ 3,223
Ratio of total past due loans to total loans	0.35%	0.22%
Commercial & industrial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Amount of loans net of loans in process	$ 1,268,695	$ 1,140,874
Current	1,267,828	1,130,836
Total delinquent	$ 867	$ 10,038
Ratio of total past due loans to total loans	0.07%	0.88%
HELOC
Accounts, Notes, Loans and Financing Receivable [Line Items]
Amount of loans net of loans in process	$ 142,178	$ 130,852
Current	140,718	129,510
Total delinquent	$ 1,460	$ 1,342
Ratio of total past due loans to total loans	1.03%	1.03%
Consumer
Accounts, Notes, Loans and Financing Receivable [Line Items]
Amount of loans net of loans in process	$ 129,883	$ 173,306
Current	129,227	172,777
Total delinquent	$ 656	$ 529
Ratio of total past due loans to total loans	0.51%	0.31%
30 Days Delinquent
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total delinquent	$ 6,273	$ 9,182
Delinquency %, past due	0.05%	0.08%
30 Days Delinquent | Single-family residential
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total delinquent	$ 3,672	$ 7,983
30 Days Delinquent | Construction
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total delinquent	0	0
30 Days Delinquent | Construction - custom
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total delinquent	0	0
30 Days Delinquent | Land - acquisition & development
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total delinquent	0	0
30 Days Delinquent | Land - consumer lot loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total delinquent	112	144
30 Days Delinquent | Multi-family
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total delinquent	0	0
30 Days Delinquent | Commercial real estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total delinquent	1,614	316
30 Days Delinquent | Commercial & industrial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total delinquent	0	0
30 Days Delinquent | HELOC
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total delinquent	580	567
30 Days Delinquent | Consumer
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total delinquent	295	172
60 Days Delinquent
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total delinquent	$ 4,415	$ 6,513
Delinquency %, past due	0.04%	0.06%
60 Days Delinquent | Single-family residential
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total delinquent	$ 3,211	$ 3,562
60 Days Delinquent | Construction
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total delinquent	0	0
60 Days Delinquent | Construction - custom
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total delinquent	0	0
60 Days Delinquent | Land - acquisition & development
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total delinquent	0	270
60 Days Delinquent | Land - consumer lot loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total delinquent	619	117
60 Days Delinquent | Multi-family
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total delinquent	0	0
60 Days Delinquent | Commercial real estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total delinquent	285	1,767
60 Days Delinquent | Commercial & industrial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total delinquent	0	0
60 Days Delinquent | HELOC
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total delinquent	183	469
60 Days Delinquent | Consumer
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total delinquent	117	328
90 Days Delinquent
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total delinquent	$ 24,682	$ 33,518
Delinquency %, past due	0.20%	0.29%
90 Days Delinquent | Single-family residential
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total delinquent	$ 19,064	$ 18,555
90 Days Delinquent | Construction
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total delinquent	0	2,427
90 Days Delinquent | Construction - custom
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total delinquent	0	0
90 Days Delinquent | Land - acquisition & development
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total delinquent	0	670
90 Days Delinquent | Land - consumer lot loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total delinquent	47	353
90 Days Delinquent | Multi-family
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total delinquent	0	0
90 Days Delinquent | Commercial real estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total delinquent	3,763	1,140
90 Days Delinquent | Commercial & industrial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total delinquent	867	10,038
90 Days Delinquent | HELOC
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total delinquent	697	306
90 Days Delinquent | Consumer
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total delinquent	$ 244	$ 29

Loans Receivable - Troubled Deb

Loans Receivable - Troubled Debt Restructurings and Loan Modifications (Details) $ in Thousands	12 Months Ended
	Sep. 30, 2019USD ($)contract	Sep. 30, 2018USD ($)contract
Financing Receivable, Troubled Debt Restructuring [Line Items]
Number of contracts | contract	9	36
Pre-Modification, outstanding recorded investment	$ 1,265	$ 13,131
Post-Modification, outstanding recorded investment	$ 1,265	$ 13,131
TDRs that subsequently defaulted, number of contracts | contract	7	5
TDRs that subsequently defaulted, recorded investment	$ 1,546	$ 510
Single-family residential
Financing Receivable, Troubled Debt Restructuring [Line Items]
Number of contracts | contract	8	27
Pre-Modification, outstanding recorded investment	$ 1,225	$ 5,070
Post-Modification, outstanding recorded investment	$ 1,225	$ 5,070
TDRs that subsequently defaulted, number of contracts | contract	7	4
TDRs that subsequently defaulted, recorded investment	$ 1,546	$ 433
Land - acquisition & development
Financing Receivable, Troubled Debt Restructuring [Line Items]
Number of contracts | contract	0	1
Pre-Modification, outstanding recorded investment	$ 0	$ 107
Post-Modification, outstanding recorded investment	$ 0	$ 107
Land - consumer lot loans
Financing Receivable, Troubled Debt Restructuring [Line Items]
Number of contracts | contract	1	0
Pre-Modification, outstanding recorded investment	$ 40	$ 0
Post-Modification, outstanding recorded investment	$ 40	$ 0
Commercial real estate
Financing Receivable, Troubled Debt Restructuring [Line Items]
Number of contracts | contract	0	1
Pre-Modification, outstanding recorded investment	$ 0	$ 120
Post-Modification, outstanding recorded investment	$ 0	$ 120
Commercial & industrial
Financing Receivable, Troubled Debt Restructuring [Line Items]
Number of contracts | contract	0	4
Pre-Modification, outstanding recorded investment	$ 0	$ 7,739
Post-Modification, outstanding recorded investment	$ 0	$ 7,739
HELOC
Financing Receivable, Troubled Debt Restructuring [Line Items]
Number of contracts | contract	0	2
Pre-Modification, outstanding recorded investment	$ 0	$ 95
Post-Modification, outstanding recorded investment	$ 0	$ 95
TDRs that subsequently defaulted, number of contracts | contract	0	1
TDRs that subsequently defaulted, recorded investment	$ 0	$ 77
Consumer
Financing Receivable, Troubled Debt Restructuring [Line Items]
Number of contracts | contract	0	1
Pre-Modification, outstanding recorded investment	$ 0	$ 0
Post-Modification, outstanding recorded investment	$ 0	$ 0

Allowance for Loan Losses - All

Allowance for Loan Losses - Allowance for Loan Losses (Details) - USD ($) $ in Thousands	12 Months Ended
	Sep. 30, 2019	Sep. 30, 2018
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Beginning Allowance	$ 129,257	$ 123,073
Charge-offs	(11,476)	(5,932)
Recoveries	15,053	16,982
Provision & Transfers	(1,300)	(4,866)
Ending Allowance	131,534	129,257
Single-family residential
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Beginning Allowance	33,033	36,892
Charge-offs	(268)	(1,142)
Recoveries	1,020	757
Provision & Transfers	(2,797)	(3,474)
Ending Allowance	30,988	33,033
Construction
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Beginning Allowance	31,317	24,556
Charge-offs	0	0
Recoveries	99	0
Provision & Transfers	888	6,761
Ending Allowance	32,304	31,317
Construction - custom
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Beginning Allowance	1,842	1,944
Charge-offs	(1,973)	(50)
Recoveries	0	0
Provision & Transfers	1,500	(52)
Ending Allowance	1,369	1,842
Land - acquisition & development
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Beginning Allowance	7,978	6,829
Charge-offs	(107)	(13)
Recoveries	7,457	14,223
Provision & Transfers	(6,173)	(13,061)
Ending Allowance	9,155	7,978
Land - consumer lot loans
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Beginning Allowance	2,164	2,649
Charge-offs	(804)	(67)
Recoveries	719	35
Provision & Transfers	64	(453)
Ending Allowance	2,143	2,164
Multi-family
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Beginning Allowance	8,329	7,862
Charge-offs	0	0
Recoveries	0	0
Provision & Transfers	(938)	467
Ending Allowance	7,391	8,329
Commercial real estate
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Beginning Allowance	11,852	11,818
Charge-offs	(428)	(36)
Recoveries	1,102	189
Provision & Transfers	644	(119)
Ending Allowance	13,170	11,852
Commercial & industrial
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Beginning Allowance	28,702	28,524
Charge-offs	(5,782)	(3,574)
Recoveries	3,443	714
Provision & Transfers	5,087	3,038
Ending Allowance	31,450	28,702
HELOC
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Beginning Allowance	781	855
Charge-offs	(1,086)	(668)
Recoveries	46	71
Provision & Transfers	1,362	523
Ending Allowance	1,103	781
Consumer
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Beginning Allowance	3,259	1,144
Charge-offs	(1,028)	(382)
Recoveries	1,167	993
Provision & Transfers	(937)	1,504
Ending Allowance	$ 2,461	$ 3,259

Allowance for Loan Losses - Nar

Allowance for Loan Losses - Narrative (Details) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2017	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2017
Financing Receivable, Allowance for Credit Loss [Line Items]
Provision (release) for loan losses	$ (1,900)	$ 0	$ 750	$ (500)	$ (5,500)	$ 1,000	$ (950)	$ 0	$ (1,650)	$ (5,450)	$ (2,100)
Allowance for credit losses, recoveries, net of charge-offs									3,577	11,050
Nonaccrual loans by portfolio segment	33,731				55,686				33,731	55,686
Loans receivable, gross	13,312,388				12,853,678				13,312,388	12,853,678
Allowance for probable losses	131,534				129,257				131,534	129,257	$ 123,073
Loans Collectively Evaluated for Impairment
Financing Receivable, Allowance for Credit Loss [Line Items]
Loans receivable, gross	12,076,622				11,597,492				12,076,622	11,597,492
Allowance for probable losses	131,095				128,740				131,095	128,740
Loans Individually Evaluated for Impairment
Financing Receivable, Allowance for Credit Loss [Line Items]
Loans receivable, gross	34,425				60,680				34,425	60,680
Allowance for probable losses	439				517				439	517
Non-Performing Loans
Financing Receivable, Allowance for Credit Loss [Line Items]
Nonaccrual loans by portfolio segment	33,731				55,686				33,731	55,686
Loans receivable, gross	$ 43,826				$ 70,093				$ 43,826	$ 70,093
Ratio of non-performing assets to total assets	0.27%				0.44%				0.27%	0.44%

Allowance for Loan Losses - Loa

Allowance for Loan Losses - Loans Collectively and Individually Evaluated for Impairment (Details) - USD ($) $ in Thousands	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2017
Financing Receivable, Allowance for Credit Loss [Line Items]
Allowance Reserve Allocation	$ 131,534	$ 129,257	$ 123,073
Recorded Investment of Loans	13,312,388	12,853,678
Single-family residential
Financing Receivable, Allowance for Credit Loss [Line Items]
Allowance Reserve Allocation	30,988	33,033	36,892
Recorded Investment of Loans	5,835,194	5,798,966
Construction
Financing Receivable, Allowance for Credit Loss [Line Items]
Allowance Reserve Allocation	32,304	31,317	24,556
Recorded Investment of Loans	2,038,052	1,890,668
Construction - custom
Financing Receivable, Allowance for Credit Loss [Line Items]
Allowance Reserve Allocation	1,369	1,842	1,944
Recorded Investment of Loans	540,741	624,479
Land - acquisition & development
Financing Receivable, Allowance for Credit Loss [Line Items]
Allowance Reserve Allocation	9,155	7,978	6,829
Recorded Investment of Loans	204,107	155,204
Land - consumer lot loans
Financing Receivable, Allowance for Credit Loss [Line Items]
Allowance Reserve Allocation	2,143	2,164	2,649
Recorded Investment of Loans	99,694	102,036
Multi-family
Financing Receivable, Allowance for Credit Loss [Line Items]
Allowance Reserve Allocation	7,391	8,329	7,862
Recorded Investment of Loans	1,422,674	1,385,125
Commercial real estate
Financing Receivable, Allowance for Credit Loss [Line Items]
Allowance Reserve Allocation	13,170	11,852	11,818
Recorded Investment of Loans	1,631,170	1,452,168
Commercial & industrial
Financing Receivable, Allowance for Credit Loss [Line Items]
Allowance Reserve Allocation	31,450	28,702	28,524
Recorded Investment of Loans	1,268,695	1,140,874
HELOC
Financing Receivable, Allowance for Credit Loss [Line Items]
Allowance Reserve Allocation	1,103	781	855
Recorded Investment of Loans	142,178	130,852
Consumer
Financing Receivable, Allowance for Credit Loss [Line Items]
Allowance Reserve Allocation	2,461	3,259	$ 1,144
Recorded Investment of Loans	129,883	173,306
Loans Collectively Evaluated for Impairment
Financing Receivable, Allowance for Credit Loss [Line Items]
Allowance Reserve Allocation	131,095	128,740
Recorded Investment of Loans	$ 12,076,622	$ 11,597,492
Ratio	1.10%	1.10%
Loans Collectively Evaluated for Impairment | Single-family residential
Financing Receivable, Allowance for Credit Loss [Line Items]
Allowance Reserve Allocation	$ 30,988	$ 33,033
Recorded Investment of Loans	$ 5,822,200	$ 5,782,870
Ratio	0.50%	0.60%
Loans Collectively Evaluated for Impairment | Construction
Financing Receivable, Allowance for Credit Loss [Line Items]
Allowance Reserve Allocation	$ 32,304	$ 31,317
Recorded Investment of Loans	$ 1,164,889	$ 1,060,428
Ratio	2.80%	3.00%
Loans Collectively Evaluated for Impairment | Construction - custom
Financing Receivable, Allowance for Credit Loss [Line Items]
Allowance Reserve Allocation	$ 1,369	$ 1,842
Recorded Investment of Loans	$ 255,505	$ 289,192
Ratio	0.50%	0.60%
Loans Collectively Evaluated for Impairment | Land - acquisition & development
Financing Receivable, Allowance for Credit Loss [Line Items]
Allowance Reserve Allocation	$ 9,135	$ 7,969
Recorded Investment of Loans	$ 160,964	$ 122,639
Ratio	5.70%	6.50%
Loans Collectively Evaluated for Impairment | Land - consumer lot loans
Financing Receivable, Allowance for Credit Loss [Line Items]
Allowance Reserve Allocation	$ 2,143	$ 2,164
Recorded Investment of Loans	$ 95,574	$ 96,583
Ratio	2.20%	2.20%
Loans Collectively Evaluated for Impairment | Multi-family
Financing Receivable, Allowance for Credit Loss [Line Items]
Allowance Reserve Allocation	$ 7,387	$ 8,325
Recorded Investment of Loans	$ 1,422,266	$ 1,384,655
Ratio	0.50%	0.60%
Loans Collectively Evaluated for Impairment | Commercial real estate
Financing Receivable, Allowance for Credit Loss [Line Items]
Allowance Reserve Allocation	$ 12,847	$ 11,702
Recorded Investment of Loans	$ 1,618,406	$ 1,432,791
Ratio	0.80%	0.80%
Loans Collectively Evaluated for Impairment | Commercial & industrial
Financing Receivable, Allowance for Credit Loss [Line Items]
Allowance Reserve Allocation	$ 31,358	$ 28,348
Recorded Investment of Loans	$ 1,266,913	$ 1,126,438
Ratio	2.50%	2.50%
Loans Collectively Evaluated for Impairment | HELOC
Financing Receivable, Allowance for Credit Loss [Line Items]
Allowance Reserve Allocation	$ 1,103	$ 781
Recorded Investment of Loans	$ 140,378	$ 128,715
Ratio	0.80%	0.60%
Loans Collectively Evaluated for Impairment | Consumer
Financing Receivable, Allowance for Credit Loss [Line Items]
Allowance Reserve Allocation	$ 2,461	$ 3,259
Recorded Investment of Loans	$ 129,527	$ 173,181
Ratio	1.90%	1.90%
Loans Individually Evaluated for Impairment
Financing Receivable, Allowance for Credit Loss [Line Items]
Allowance Reserve Allocation	$ 439	$ 517
Recorded Investment of Loans	$ 34,425	$ 60,680
Ratio	1.30%	0.90%
Loans Individually Evaluated for Impairment | Single-family residential
Financing Receivable, Allowance for Credit Loss [Line Items]
Allowance Reserve Allocation	$ 0	$ 0
Recorded Investment of Loans	$ 17,978	$ 21,345
Ratio	0.00%	0.00%
Loans Individually Evaluated for Impairment | Construction
Financing Receivable, Allowance for Credit Loss [Line Items]
Allowance Reserve Allocation	$ 0	$ 0
Recorded Investment of Loans	$ 0	$ 2,427
Ratio	0.00%	0.00%
Loans Individually Evaluated for Impairment | Construction - custom
Financing Receivable, Allowance for Credit Loss [Line Items]
Allowance Reserve Allocation	$ 0	$ 0
Recorded Investment of Loans	$ 0	$ 0
Ratio	0.00%	0.00%
Loans Individually Evaluated for Impairment | Land - acquisition & development
Financing Receivable, Allowance for Credit Loss [Line Items]
Allowance Reserve Allocation	$ 20	$ 9
Recorded Investment of Loans	$ 230	$ 920
Ratio	8.70%	1.00%
Loans Individually Evaluated for Impairment | Land - consumer lot loans
Financing Receivable, Allowance for Credit Loss [Line Items]
Allowance Reserve Allocation	$ 0	$ 0
Recorded Investment of Loans	$ 375	$ 507
Ratio	0.00%	0.00%
Loans Individually Evaluated for Impairment | Multi-family
Financing Receivable, Allowance for Credit Loss [Line Items]
Allowance Reserve Allocation	$ 4	$ 4
Recorded Investment of Loans	$ 385	$ 448
Ratio	1.00%	1.00%
Loans Individually Evaluated for Impairment | Commercial real estate
Financing Receivable, Allowance for Credit Loss [Line Items]
Allowance Reserve Allocation	$ 323	$ 150
Recorded Investment of Loans	$ 12,765	$ 19,378
Ratio	2.50%	0.80%
Loans Individually Evaluated for Impairment | Commercial & industrial
Financing Receivable, Allowance for Credit Loss [Line Items]
Allowance Reserve Allocation	$ 92	$ 354
Recorded Investment of Loans	$ 1,805	$ 14,437
Ratio	5.10%	2.50%
Loans Individually Evaluated for Impairment | HELOC
Financing Receivable, Allowance for Credit Loss [Line Items]
Allowance Reserve Allocation	$ 0	$ 0
Recorded Investment of Loans	$ 837	$ 1,162
Ratio	0.00%	0.00%
Loans Individually Evaluated for Impairment | Consumer
Financing Receivable, Allowance for Credit Loss [Line Items]
Allowance Reserve Allocation	$ 0	$ 0
Recorded Investment of Loans	$ 50	$ 56
Ratio	0.00%	0.00%

Allowance for Loan Losses - Int

Allowance for Loan Losses - Internally Assigned Grade (Details) - USD ($) $ in Thousands	Sep. 30, 2019	Sep. 30, 2018
Financing Receivable, Credit Quality Indicator [Line Items]
Loans receivable, gross	$ 13,312,388	$ 12,853,678
Single-family residential
Financing Receivable, Credit Quality Indicator [Line Items]
Loans receivable, gross	5,835,194	5,798,966
Construction
Financing Receivable, Credit Quality Indicator [Line Items]
Loans receivable, gross	2,038,052	1,890,668
Construction - custom
Financing Receivable, Credit Quality Indicator [Line Items]
Loans receivable, gross	540,741	624,479
Land - acquisition & development
Financing Receivable, Credit Quality Indicator [Line Items]
Loans receivable, gross	204,107	155,204
Land - consumer lot loans
Financing Receivable, Credit Quality Indicator [Line Items]
Loans receivable, gross	99,694	102,036
Multi-family
Financing Receivable, Credit Quality Indicator [Line Items]
Loans receivable, gross	1,422,674	1,385,125
Commercial real estate
Financing Receivable, Credit Quality Indicator [Line Items]
Loans receivable, gross	1,631,170	1,452,168
Commercial & industrial
Financing Receivable, Credit Quality Indicator [Line Items]
Loans receivable, gross	1,268,695	1,140,874
HELOC
Financing Receivable, Credit Quality Indicator [Line Items]
Loans receivable, gross	142,178	130,852
Consumer
Financing Receivable, Credit Quality Indicator [Line Items]
Loans receivable, gross	129,883	173,306
Pass
Financing Receivable, Credit Quality Indicator [Line Items]
Loans receivable, gross	$ 13,208,853	$ 12,728,537
Total grade as a % of total gross loans	99.20%	99.00%
Pass | Single-family residential
Financing Receivable, Credit Quality Indicator [Line Items]
Loans receivable, gross	$ 5,808,444	$ 5,766,096
Pass | Construction
Financing Receivable, Credit Quality Indicator [Line Items]
Loans receivable, gross	2,038,052	1,886,304
Pass | Construction - custom
Financing Receivable, Credit Quality Indicator [Line Items]
Loans receivable, gross	540,741	624,479
Pass | Land - acquisition & development
Financing Receivable, Credit Quality Indicator [Line Items]
Loans receivable, gross	200,283	152,984
Pass | Land - consumer lot loans
Financing Receivable, Credit Quality Indicator [Line Items]
Loans receivable, gross	98,828	101,249
Pass | Multi-family
Financing Receivable, Credit Quality Indicator [Line Items]
Loans receivable, gross	1,418,837	1,378,803
Pass | Commercial real estate
Financing Receivable, Credit Quality Indicator [Line Items]
Loans receivable, gross	1,602,634	1,421,602
Pass | Commercial & industrial
Financing Receivable, Credit Quality Indicator [Line Items]
Loans receivable, gross	1,229,891	1,093,405
Pass | HELOC
Financing Receivable, Credit Quality Indicator [Line Items]
Loans receivable, gross	141,271	130,330
Pass | Consumer
Financing Receivable, Credit Quality Indicator [Line Items]
Loans receivable, gross	129,872	173,285
Special mention
Financing Receivable, Credit Quality Indicator [Line Items]
Loans receivable, gross	$ 20,879	$ 27,197
Total grade as a % of total gross loans	0.20%	0.20%
Special mention | Single-family residential
Financing Receivable, Credit Quality Indicator [Line Items]
Loans receivable, gross	$ 0	$ 0
Special mention | Construction
Financing Receivable, Credit Quality Indicator [Line Items]
Loans receivable, gross	0	1,937
Special mention | Construction - custom
Financing Receivable, Credit Quality Indicator [Line Items]
Loans receivable, gross	0	0
Special mention | Land - acquisition & development
Financing Receivable, Credit Quality Indicator [Line Items]
Loans receivable, gross	0	0
Special mention | Land - consumer lot loans
Financing Receivable, Credit Quality Indicator [Line Items]
Loans receivable, gross	0	0
Special mention | Multi-family
Financing Receivable, Credit Quality Indicator [Line Items]
Loans receivable, gross	0	1,633
Special mention | Commercial real estate
Financing Receivable, Credit Quality Indicator [Line Items]
Loans receivable, gross	2,754	7,114
Special mention | Commercial & industrial
Financing Receivable, Credit Quality Indicator [Line Items]
Loans receivable, gross	18,125	16,513
Special mention | HELOC
Financing Receivable, Credit Quality Indicator [Line Items]
Loans receivable, gross	0	0
Special mention | Consumer
Financing Receivable, Credit Quality Indicator [Line Items]
Loans receivable, gross	0	0
Substandard
Financing Receivable, Credit Quality Indicator [Line Items]
Loans receivable, gross	$ 82,656	$ 97,944
Total grade as a % of total gross loans	0.60%	0.80%
Substandard | Single-family residential
Financing Receivable, Credit Quality Indicator [Line Items]
Loans receivable, gross	$ 26,750	$ 32,870
Substandard | Construction
Financing Receivable, Credit Quality Indicator [Line Items]
Loans receivable, gross	0	2,427
Substandard | Construction - custom
Financing Receivable, Credit Quality Indicator [Line Items]
Loans receivable, gross	0	0
Substandard | Land - acquisition & development
Financing Receivable, Credit Quality Indicator [Line Items]
Loans receivable, gross	3,824	2,220
Substandard | Land - consumer lot loans
Financing Receivable, Credit Quality Indicator [Line Items]
Loans receivable, gross	866	787
Substandard | Multi-family
Financing Receivable, Credit Quality Indicator [Line Items]
Loans receivable, gross	3,837	4,689
Substandard | Commercial real estate
Financing Receivable, Credit Quality Indicator [Line Items]
Loans receivable, gross	25,782	23,452
Substandard | Commercial & industrial
Financing Receivable, Credit Quality Indicator [Line Items]
Loans receivable, gross	20,679	30,956
Substandard | HELOC
Financing Receivable, Credit Quality Indicator [Line Items]
Loans receivable, gross	907	522
Substandard | Consumer
Financing Receivable, Credit Quality Indicator [Line Items]
Loans receivable, gross	11	21
Doubtful
Financing Receivable, Credit Quality Indicator [Line Items]
Loans receivable, gross	$ 0	$ 0
Total grade as a % of total gross loans	0.00%	0.00%
Doubtful | Single-family residential
Financing Receivable, Credit Quality Indicator [Line Items]
Loans receivable, gross	$ 0	$ 0
Doubtful | Construction
Financing Receivable, Credit Quality Indicator [Line Items]
Loans receivable, gross	0	0
Doubtful | Construction - custom
Financing Receivable, Credit Quality Indicator [Line Items]
Loans receivable, gross	0	0
Doubtful | Land - acquisition & development
Financing Receivable, Credit Quality Indicator [Line Items]
Loans receivable, gross	0	0
Doubtful | Land - consumer lot loans
Financing Receivable, Credit Quality Indicator [Line Items]
Loans receivable, gross	0	0
Doubtful | Multi-family
Financing Receivable, Credit Quality Indicator [Line Items]
Loans receivable, gross	0	0
Doubtful | Commercial real estate
Financing Receivable, Credit Quality Indicator [Line Items]
Loans receivable, gross	0	0
Doubtful | Commercial & industrial
Financing Receivable, Credit Quality Indicator [Line Items]
Loans receivable, gross	0	0
Doubtful | HELOC
Financing Receivable, Credit Quality Indicator [Line Items]
Loans receivable, gross	0	0
Doubtful | Consumer
Financing Receivable, Credit Quality Indicator [Line Items]
Loans receivable, gross	0	0
Loss
Financing Receivable, Credit Quality Indicator [Line Items]
Loans receivable, gross	$ 0	$ 0
Total grade as a % of total gross loans	0.00%	0.00%
Loss | Single-family residential
Financing Receivable, Credit Quality Indicator [Line Items]
Loans receivable, gross	$ 0	$ 0
Loss | Construction
Financing Receivable, Credit Quality Indicator [Line Items]
Loans receivable, gross	0	0
Loss | Construction - custom
Financing Receivable, Credit Quality Indicator [Line Items]
Loans receivable, gross	0	0
Loss | Land - acquisition & development
Financing Receivable, Credit Quality Indicator [Line Items]
Loans receivable, gross	0	0
Loss | Land - consumer lot loans
Financing Receivable, Credit Quality Indicator [Line Items]
Loans receivable, gross	0	0
Loss | Multi-family
Financing Receivable, Credit Quality Indicator [Line Items]
Loans receivable, gross	0	0
Loss | Commercial real estate
Financing Receivable, Credit Quality Indicator [Line Items]
Loans receivable, gross	0	0
Loss | Commercial & industrial
Financing Receivable, Credit Quality Indicator [Line Items]
Loans receivable, gross	0	0
Loss | HELOC
Financing Receivable, Credit Quality Indicator [Line Items]
Loans receivable, gross	0	0
Loss | Consumer
Financing Receivable, Credit Quality Indicator [Line Items]
Loans receivable, gross	$ 0	$ 0

Allowance for Loan Losses - Cre

Allowance for Loan Losses - Credit Risk Profile Based on Payment Activity (Details) - USD ($) $ in Thousands	Sep. 30, 2019	Sep. 30, 2018
Financing Receivable, Credit Quality Indicator [Line Items]
Performing loans, amount	$ 13,312,388	$ 12,853,678
Non-Performing loans, amount	33,731	55,686
Single-family residential
Financing Receivable, Credit Quality Indicator [Line Items]
Performing loans, amount	5,835,194	5,798,966
Construction
Financing Receivable, Credit Quality Indicator [Line Items]
Performing loans, amount	2,038,052	1,890,668
Construction - custom
Financing Receivable, Credit Quality Indicator [Line Items]
Performing loans, amount	540,741	624,479
Land - acquisition & development
Financing Receivable, Credit Quality Indicator [Line Items]
Performing loans, amount	204,107	155,204
Land - consumer lot loans
Financing Receivable, Credit Quality Indicator [Line Items]
Performing loans, amount	99,694	102,036
Multi-family
Financing Receivable, Credit Quality Indicator [Line Items]
Performing loans, amount	1,422,674	1,385,125
Commercial real estate
Financing Receivable, Credit Quality Indicator [Line Items]
Performing loans, amount	1,631,170	1,452,168
Commercial & industrial
Financing Receivable, Credit Quality Indicator [Line Items]
Performing loans, amount	1,268,695	1,140,874
HELOC
Financing Receivable, Credit Quality Indicator [Line Items]
Performing loans, amount	142,178	130,852
Consumer
Financing Receivable, Credit Quality Indicator [Line Items]
Performing loans, amount	129,883	173,306
Performing Loans
Financing Receivable, Credit Quality Indicator [Line Items]
Performing loans, amount	$ 13,278,657	$ 12,797,992
Performing loans, % of total gross loans	99.70%	99.60%
Performing Loans | Single-family residential
Financing Receivable, Credit Quality Indicator [Line Items]
Performing loans, amount	$ 5,809,923	$ 5,771,323
Performing loans, % of total gross loans	99.60%	99.50%
Performing Loans | Construction
Financing Receivable, Credit Quality Indicator [Line Items]
Performing loans, amount	$ 2,038,052	$ 1,888,241
Performing loans, % of total gross loans	100.00%	99.90%
Performing Loans | Construction - custom
Financing Receivable, Credit Quality Indicator [Line Items]
Performing loans, amount	$ 540,741	$ 624,479
Performing loans, % of total gross loans	100.00%	100.00%
Performing Loans | Land - acquisition & development
Financing Receivable, Credit Quality Indicator [Line Items]
Performing loans, amount	$ 203,938	$ 154,284
Performing loans, % of total gross loans	99.90%	99.40%
Performing Loans | Land - consumer lot loans
Financing Receivable, Credit Quality Indicator [Line Items]
Performing loans, amount	$ 99,448	$ 101,249
Performing loans, % of total gross loans	99.80%	99.20%
Performing Loans | Multi-family
Financing Receivable, Credit Quality Indicator [Line Items]
Performing loans, amount	$ 1,422,674	$ 1,385,125
Performing loans, % of total gross loans	100.00%	100.00%
Performing Loans | Commercial real estate
Financing Receivable, Credit Quality Indicator [Line Items]
Performing loans, amount	$ 1,625,335	$ 1,443,197
Performing loans, % of total gross loans	99.60%	99.40%
Performing Loans | Commercial & industrial
Financing Receivable, Credit Quality Indicator [Line Items]
Performing loans, amount	$ 1,267,403	$ 1,126,480
Performing loans, % of total gross loans	99.90%	98.70%
Performing Loans | HELOC
Financing Receivable, Credit Quality Indicator [Line Items]
Performing loans, amount	$ 141,271	$ 130,329
Performing loans, % of total gross loans	99.40%	99.60%
Performing Loans | Consumer
Financing Receivable, Credit Quality Indicator [Line Items]
Performing loans, amount	$ 129,872	$ 173,285
Performing loans, % of total gross loans	100.00%	100.00%
Non-Performing Loans
Financing Receivable, Credit Quality Indicator [Line Items]
Performing loans, amount	$ 43,826	$ 70,093
Non-Performing loans, amount	$ 33,731	$ 55,686
Non-Performing loans, % of total gross loans	0.30%	0.40%
Non-Performing Loans | Single-family residential
Financing Receivable, Credit Quality Indicator [Line Items]
Non-Performing loans, amount	$ 25,271	$ 27,643
Non-Performing loans, % of total gross loans	0.40%	0.50%
Non-Performing Loans | Construction
Financing Receivable, Credit Quality Indicator [Line Items]
Non-Performing loans, amount	$ 0	$ 2,427
Non-Performing loans, % of total gross loans	0.00%	0.10%
Non-Performing Loans | Construction - custom
Financing Receivable, Credit Quality Indicator [Line Items]
Non-Performing loans, amount	$ 0	$ 0
Non-Performing loans, % of total gross loans	0.00%	0.00%
Non-Performing Loans | Land - acquisition & development
Financing Receivable, Credit Quality Indicator [Line Items]
Non-Performing loans, amount	$ 169	$ 920
Non-Performing loans, % of total gross loans	0.10%	0.60%
Non-Performing Loans | Land - consumer lot loans
Financing Receivable, Credit Quality Indicator [Line Items]
Non-Performing loans, amount	$ 246	$ 787
Non-Performing loans, % of total gross loans	0.20%	0.80%
Non-Performing Loans | Multi-family
Financing Receivable, Credit Quality Indicator [Line Items]
Non-Performing loans, amount	$ 0	$ 0
Non-Performing loans, % of total gross loans	0.00%	0.00%
Non-Performing Loans | Commercial real estate
Financing Receivable, Credit Quality Indicator [Line Items]
Non-Performing loans, amount	$ 5,835	$ 8,971
Non-Performing loans, % of total gross loans	0.40%	0.60%
Non-Performing Loans | Commercial & industrial
Financing Receivable, Credit Quality Indicator [Line Items]
Non-Performing loans, amount	$ 1,292	$ 14,394
Non-Performing loans, % of total gross loans	0.10%	1.30%
Non-Performing Loans | HELOC
Financing Receivable, Credit Quality Indicator [Line Items]
Non-Performing loans, amount	$ 907	$ 523
Non-Performing loans, % of total gross loans	0.60%	0.40%
Non-Performing Loans | Consumer
Financing Receivable, Credit Quality Indicator [Line Items]
Non-Performing loans, amount	$ 11	$ 21
Non-Performing loans, % of total gross loans	0.00%	0.00%

Allowance for Loan Losses - Imp

Allowance for Loan Losses - Impaired Loans Based on Loan Types (Details) - USD ($) $ in Thousands	12 Months Ended
	Sep. 30, 2019	Sep. 30, 2018
Financing Receivable, Impaired [Line Items]
Recorded investment	$ 149,546	$ 199,545
Unpaid principal balance	164,561	214,712
Related allowance	2,647	3,388
Average recorded investment	175,187	228,398
Amount of related allowance included in specific reserves	439	517
Amount of related allowance included in general reserves	2,208	2,871
Single-family residential
Financing Receivable, Impaired [Line Items]
Recorded investment	130,021	158,668
Unpaid principal balance	133,861	163,149
Related allowance	2,208	2,871
Average recorded investment	142,661	181,826
Construction
Financing Receivable, Impaired [Line Items]
Recorded investment	0	2,698
Unpaid principal balance	0	2,818
Related allowance	0	0
Average recorded investment	1,172	1,349
Construction - custom
Financing Receivable, Impaired [Line Items]
Recorded investment	0	0
Unpaid principal balance	0	0
Related allowance	0	0
Average recorded investment	251	74
Land - acquisition & development
Financing Receivable, Impaired [Line Items]
Recorded investment	169	921
Unpaid principal balance	295	971
Related allowance	0	0
Average recorded investment	389	611
Land - consumer lot loans
Financing Receivable, Impaired [Line Items]
Recorded investment	3,900	5,227
Unpaid principal balance	4,543	5,626
Related allowance	20	9
Average recorded investment	4,611	6,709
Multi-family
Financing Receivable, Impaired [Line Items]
Recorded investment	385	448
Unpaid principal balance	385	448
Related allowance	4	4
Average recorded investment	704	541
Commercial real estate
Financing Receivable, Impaired [Line Items]
Recorded investment	11,635	15,679
Unpaid principal balance	17,179	21,768
Related allowance	323	150
Average recorded investment	14,050	21,603
Commercial & industrial
Financing Receivable, Impaired [Line Items]
Recorded investment	1,540	14,428
Unpaid principal balance	6,003	17,652
Related allowance	92	354
Average recorded investment	9,703	13,703
HELOC
Financing Receivable, Impaired [Line Items]
Recorded investment	1,786	1,386
Unpaid principal balance	1,894	2,154
Related allowance	0	0
Average recorded investment	1,558	1,845
Consumer
Financing Receivable, Impaired [Line Items]
Recorded investment	110	90
Unpaid principal balance	401	126
Related allowance	0	0
Average recorded investment	88	137
Impaired loans with no related allowance recorded
Financing Receivable, Impaired [Line Items]
Recorded investment	27,869	42,687
Unpaid principal balance	38,486	49,425
Related allowance	0	0
Average recorded investment	35,649	43,292
Impaired loans with no related allowance recorded | Single-family residential
Financing Receivable, Impaired [Line Items]
Recorded investment	17,979	18,872
Unpaid principal balance	19,252	20,050
Related allowance	0	0
Average recorded investment	16,685	20,097
Impaired loans with no related allowance recorded | Construction
Financing Receivable, Impaired [Line Items]
Recorded investment	0	2,698
Unpaid principal balance	0	2,818
Related allowance	0	0
Average recorded investment	1,172	1,349
Impaired loans with no related 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	251	74
Impaired loans with no related allowance recorded | Land - acquisition & development
Financing Receivable, Impaired [Line Items]
Recorded investment	78	814
Unpaid principal balance	143	814
Related allowance	0	0
Average recorded investment	290	572
Impaired loans with no related allowance recorded | Land - consumer lot loans
Financing Receivable, Impaired [Line Items]
Recorded investment	344	311
Unpaid principal balance	848	336
Related allowance	0	0
Average recorded investment	287	260
Impaired loans with no related allowance recorded | Multi-family
Financing Receivable, Impaired [Line Items]
Recorded investment	0	0
Unpaid principal balance	0	0
Related allowance	0	0
Average recorded investment	286	70
Impaired loans with no related allowance recorded | Commercial real estate
Financing Receivable, Impaired [Line Items]
Recorded investment	7,467	9,425
Unpaid principal balance	11,881	14,035
Related allowance	0	0
Average recorded investment	8,890	11,158
Impaired loans with no related allowance recorded | Commercial & industrial
Financing Receivable, Impaired [Line Items]
Recorded investment	1,114	10,137
Unpaid principal balance	5,312	10,146
Related allowance	0	0
Average recorded investment	7,168	9,208
Impaired loans with no related allowance recorded | HELOC
Financing Receivable, Impaired [Line Items]
Recorded investment	837	410
Unpaid principal balance	931	1,170
Related allowance	0	0
Average recorded investment	597	450
Impaired loans with no related allowance recorded | Consumer
Financing Receivable, Impaired [Line Items]
Recorded investment	50	20
Unpaid principal balance	119	56
Related allowance	0	0
Average recorded investment	23	54
Impaired loans with an allowance recorded
Financing Receivable, Impaired [Line Items]
Recorded investment	121,677	156,858
Unpaid principal balance	126,075	165,287
Related allowance	2,647	3,388
Average recorded investment	139,538	185,106
Impaired loans with an allowance recorded | Single-family residential
Financing Receivable, Impaired [Line Items]
Recorded investment	112,042	139,796
Unpaid principal balance	114,609	143,099
Related allowance	2,208	2,871
Average recorded investment	125,976	161,729
Impaired loans with an allowance recorded | Land - acquisition & development
Financing Receivable, Impaired [Line Items]
Recorded investment	91	107
Unpaid principal balance	152	157
Related allowance	0	0
Average recorded investment	99	39
Impaired loans with an allowance recorded | Land - consumer lot loans
Financing Receivable, Impaired [Line Items]
Recorded investment	3,556	4,916
Unpaid principal balance	3,695	5,290
Related allowance	20	9
Average recorded investment	4,324	6,449
Impaired loans with an allowance recorded | Multi-family
Financing Receivable, Impaired [Line Items]
Recorded investment	385	448
Unpaid principal balance	385	448
Related allowance	4	4
Average recorded investment	418	471
Impaired loans with an allowance recorded | Commercial real estate
Financing Receivable, Impaired [Line Items]
Recorded investment	4,168	6,254
Unpaid principal balance	5,298	7,733
Related allowance	323	150
Average recorded investment	5,160	10,445
Impaired loans with an allowance recorded | Commercial & industrial
Financing Receivable, Impaired [Line Items]
Recorded investment	426	4,291
Unpaid principal balance	691	7,506
Related allowance	92	354
Average recorded investment	2,535	4,495
Impaired loans with an allowance recorded | HELOC
Financing Receivable, Impaired [Line Items]
Recorded investment	949	976
Unpaid principal balance	963	984
Related allowance	0	0
Average recorded investment	961	1,395
Impaired loans with an allowance recorded | Consumer
Financing Receivable, Impaired [Line Items]
Recorded investment	60	70
Unpaid principal balance	282	70
Related allowance	0	0
Average recorded investment	$ 65	$ 83

Fair Value Measurements - Fair

Fair Value Measurements - Fair Value Measured on Recurring Basis (Details) - USD ($) $ in Thousands	Sep. 30, 2019	Sep. 30, 2018
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	$ 1,485,742	$ 1,314,957
Total Financial Assets	2,948,837	2,863,727
Recurring
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	1,485,742	1,314,957
Total Financial Assets	1,507,731	1,353,795
Total Financial Liabilities	32,546	12,731
Recurring | Client swap program hedges
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative assets	20,381	12,731
Derivative liabilities	20,381	12,731
Recurring | Mortgage loan fair value hedges
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative assets	1,608
Recurring | Commercial loan fair value hedges
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative assets		3,857
Derivative liabilities	4,288
Recurring | Borrowings cash flow hedges
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative assets		22,250
Derivative liabilities	7,877
Recurring | Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	0	488
Total Financial Assets	0	488
Total Financial Liabilities	0	0
Recurring | Level 1 | Client swap program hedges
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative assets	0	0
Derivative liabilities	0	0
Recurring | Level 1 | Mortgage loan fair value hedges
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative assets	0
Recurring | Level 1 | Commercial loan fair value hedges
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative assets		0
Derivative liabilities	0
Recurring | Level 1 | Borrowings cash flow hedges
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative assets		0
Derivative liabilities	0
Recurring | Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	1,485,742	1,314,469
Total Financial Assets	1,507,731	1,353,307
Total Financial Liabilities	32,546	12,731
Recurring | Level 2 | Client swap program hedges
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative assets	20,381	12,731
Derivative liabilities	20,381	12,731
Recurring | Level 2 | Mortgage loan fair value hedges
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative assets	1,608
Recurring | Level 2 | Commercial loan fair value hedges
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative assets		3,857
Derivative liabilities	4,288
Recurring | Level 2 | Borrowings cash flow hedges
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative assets		22,250
Derivative liabilities	7,877
Recurring | Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	0	0
Total Financial Assets	0	0
Total Financial Liabilities	0	0
Recurring | Level 3 | Client swap program hedges
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative assets	0	0
Derivative liabilities	0	0
Recurring | Level 3 | Mortgage loan fair value hedges
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative assets	0
Recurring | Level 3 | Commercial loan fair value hedges
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative assets		0
Derivative liabilities	0
Recurring | Level 3 | Borrowings cash flow hedges
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative assets		0
Derivative liabilities	0
Equity securities | Recurring
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities		488
Equity securities | Recurring | Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities		488
Equity securities | Recurring | Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities		0
Equity securities | Recurring | Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities		0
U.S. government and agency securities | Recurring
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	270,778	207,293
U.S. government and agency securities | Recurring | Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	0	0
U.S. government and agency securities | Recurring | Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	270,778	207,293
U.S. government and agency securities | Recurring | Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	0	0
Municipal bonds | Recurring
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	22,642	22,978
Municipal bonds | Recurring | Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	0	0
Municipal bonds | Recurring | Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	22,642	22,978
Municipal bonds | Recurring | Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	0	0
Corporate debt securities | Recurring
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	209,763	184,695
Corporate debt securities | Recurring | Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	0	0
Corporate debt securities | Recurring | Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	209,763	184,695
Corporate debt securities | Recurring | Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	0	0
Agency pass-through certificates | Recurring
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	982,559	896,041
Agency pass-through certificates | Recurring | Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	0	0
Agency pass-through certificates | Recurring | Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	982,559	896,041
Agency pass-through certificates | Recurring | Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	$ 0	0
Commercial MBS | Recurring
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities		3,462
Commercial MBS | Recurring | Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities		0
Commercial MBS | Recurring | Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities		3,462
Commercial MBS | Recurring | Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities		$ 0

Fair Value Measurements - Fai_2

Fair Value Measurements - Fair Value Measured on Nonrecurring Basis (Details) - Nonrecurring - USD ($) $ in Thousands	3 Months Ended		12 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets, fair value disclosure	$ 13,969	$ 23,955	$ 13,969	$ 23,955
Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets, fair value disclosure	0	0	0	0
Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets, fair value disclosure	0	0	0	0
Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets, fair value disclosure	13,969	23,955	13,969	23,955
Impaired loans
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets, fair value disclosure	6,662	16,500	6,662	16,500
Impaired loans | Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets, fair value disclosure	0	0	0	0
Impaired loans | Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets, fair value disclosure	0	0	0	0
Impaired loans | Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets, fair value disclosure	6,662	16,500	6,662	16,500
Real estate owned
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets, fair value disclosure	7,307	7,455	7,307	7,455
Real estate owned | Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets, fair value disclosure	0	0	0	0
Real estate owned | Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets, fair value disclosure	0	0	0	0
Real estate owned | Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets, fair value disclosure	7,307	7,455	7,307	7,455
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	(2,451)	(833)	(7,677)	(5,582)
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	(2,176)	(707)	(7,796)	(4,800)
Changes Measurement | Real estate owned
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Losses related to impaired loans and real estate held for sale	$ (275)	$ (126)	$ 119	$ (782)

Fair Value Measurements - Fai_3

Fair Value Measurements - Fair Value by Balance Sheet Grouping (Details) - USD ($) $ in Thousands	Sep. 30, 2019	Sep. 30, 2018
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	$ 1,485,742	$ 1,314,957
Held-to-maturity securities	1,463,095	1,548,770
Carrying Amount
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	1,485,742	1,314,957
Held-to-maturity securities	1,443,480	1,625,420
Carrying Amount | Commercial MBS
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Held-to-maturity securities	15,000	15,000
Carrying Amount | Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash and cash equivalents	419,158	268,650
Carrying Amount | Level 1 | Equity securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	0	488
Carrying Amount | Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
FHLB and FRB stock	123,990	127,190
Time deposits	4,906,963	4,804,803
FHLB advances and other borrowings	2,250,000	2,330,000
Carrying Amount | Level 2 | Client swap program hedges
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative assets	20,381	12,731
Other liabilities	20,381	12,731
Carrying Amount | Level 2 | Commercial loan fair value hedges
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative assets	0	3,857
Other liabilities	4,288	0
Carrying Amount | Level 2 | Mortgage loan fair value hedges
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative assets	1,608	0
Carrying Amount | Level 2 | Borrowing hedges
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative assets	0	22,250
Other liabilities	7,877	0
Carrying Amount | Level 2 | U.S. government and agency securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	270,778	207,293
Carrying Amount | Level 2 | Municipal bonds
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	22,642	22,978
Carrying Amount | Level 2 | Corporate debt securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	209,763	184,695
Carrying Amount | Level 2 | Agency pass-through certificates
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	982,559	896,041
Held-to-maturity securities	1,428,480	1,610,420
Carrying Amount | Level 2 | Commercial MBS
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	0	3,462
Carrying Amount | Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Loans receivable	11,930,575	11,477,081
Estimated Fair Value
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	1,485,742	1,314,957
Held-to-maturity securities	1,463,095	1,548,770
Estimated Fair Value | Commercial MBS
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Held-to-maturity securities	15,007	15,028
Estimated Fair Value | Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash and cash equivalents	419,158	268,650
Estimated Fair Value | Level 1 | Equity securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	0	488
Estimated Fair Value | Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
FHLB and FRB stock	123,990	127,190
Time deposits	4,937,847	4,779,040
FHLB advances and other borrowings	2,282,887	2,316,964
Estimated Fair Value | Level 2 | Client swap program hedges
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative assets	20,381	12,731
Other liabilities	20,381	12,731
Estimated Fair Value | Level 2 | Commercial loan fair value hedges
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative assets	0	3,857
Other liabilities	4,288	0
Estimated Fair Value | Level 2 | Mortgage loan fair value hedges
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative assets	1,608	0
Estimated Fair Value | Level 2 | Borrowing hedges
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative assets	0	22,250
Other liabilities	7,877	0
Estimated Fair Value | Level 2 | U.S. government and agency securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	270,778	207,293
Estimated Fair Value | Level 2 | Municipal bonds
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	22,642	22,978
Estimated Fair Value | Level 2 | Corporate debt securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	209,763	184,695
Estimated Fair Value | Level 2 | Agency pass-through certificates
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	982,559	896,041
Held-to-maturity securities	1,448,088	1,533,742
Estimated Fair Value | Level 2 | Commercial MBS
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	0	3,462
Estimated Fair Value | Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Loans receivable	$ 12,617,600	$ 11,556,326

Derivatives and Hedging Activ_3

Derivatives and Hedging Activities - Summary of Fair Value, Notional Amount and Balance Sheet Classification (Details) - USD ($) $ in Thousands	Sep. 30, 2019	Sep. 30, 2018
Other assets
Derivatives, Fair Value [Line Items]
Derivative, notional amount	$ 625,607	$ 1,193,323
Derivative assets, fair value	21,989	38,838
Other liabilities
Derivatives, Fair Value [Line Items]
Derivative, notional amount	1,221,252	395,396
Derivative liabilities, fair value	32,546	12,731
Client swap program hedges | Other assets
Derivatives, Fair Value [Line Items]
Derivative, notional amount	425,607	395,396
Derivative assets, fair value	20,381	12,731
Client swap program hedges | Other liabilities
Derivatives, Fair Value [Line Items]
Derivative, notional amount	425,607	395,396
Derivative liabilities, fair value	20,381	12,731
Commercial loan fair value hedges | Other assets
Derivatives, Fair Value [Line Items]
Derivative, notional amount	0	97,927
Derivative assets, fair value	0	3,857
Commercial loan fair value hedges | Other liabilities
Derivatives, Fair Value [Line Items]
Derivative, notional amount	95,645	0
Derivative liabilities, fair value	4,288	0
Mortgage loan fair value hedges | Other assets
Derivatives, Fair Value [Line Items]
Derivative, notional amount	200,000
Derivative assets, fair value	1,608
Mortgage loan fair value hedges | Other liabilities
Derivatives, Fair Value [Line Items]
Derivative, notional amount	0
Derivative liabilities, fair value	0
Borrowings cash flow hedges | Other assets
Derivatives, Fair Value [Line Items]
Derivative, notional amount	0	700,000
Derivative assets, fair value	0	22,250
Borrowings cash flow hedges | Other liabilities
Derivatives, Fair Value [Line Items]
Derivative, notional amount	700,000	0
Derivative liabilities, fair value	$ 7,877	$ 0

Derivatives and Hedging Activ_4

Derivatives and Hedging Activities - Impact of Fair Value Hedge Accounting on the Carrying Value of the Hedged Items (Details) $ in Thousands	Sep. 30, 2019USD ($)
Derivatives, Fair Value [Line Items]
Carrying value of hedged items	$ 1,612,208
Cumulative gain (loss) fair value hedge adjustment included in carrying amount of hedged items	(2,680)
Loans receivable
Derivatives, Fair Value [Line Items]
Carrying value of hedged items	1,612,208
Cumulative gain (loss) fair value hedge adjustment included in carrying amount of hedged items	(2,680)
Mortgage loan fair value hedges
Derivatives, Fair Value [Line Items]
Cumulative gain (loss) fair value hedge adjustment included in carrying amount of hedged items	1,608
Amortized cost basis of the hedged loans	200,000
Mortgage loan fair value hedges | Loans receivable
Derivatives, Fair Value [Line Items]
Carrying value of hedged items	1,520,647
Commercial loan fair value hedges
Derivatives, Fair Value [Line Items]
Cumulative gain (loss) fair value hedge adjustment included in carrying amount of hedged items	(4,288)
Commercial loan fair value hedges | Loans receivable
Derivatives, Fair Value [Line Items]
Carrying value of hedged items	$ 91,561

Derivatives and Hedging Activ_5

Derivatives and Hedging Activities - Additional Information (Details)	12 Months Ended
	Sep. 30, 2019
Minimum
Derivative [Line Items]
Derivative, maturities	1 year
Maximum
Derivative [Line Items]
Derivative, maturities	7 years
Weighted average
Derivative [Line Items]
Derivative, maturities	2 years 7 months 6 days

Derivatives and Hedging Activ_6

Derivatives and Hedging Activities - Impact of Derivative Instruments on AOCI (Details) - USD ($) $ in Thousands	12 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2017
Derivative [Line Items]
Amount of gain/(loss) recognized in AOCI on derivatives in cash flow hedging relationships	$ (30,127)	$ 23,943	$ 29,653
Cash flow hedging
Derivative [Line Items]
Amount of gain/(loss) recognized in AOCI on derivatives in cash flow hedging relationships	(28,519)
Cash flow hedging | Pay fixed/receive floating swap
Derivative [Line Items]
Amount of gain/(loss) recognized in AOCI on derivatives in cash flow hedging relationships	$ (28,519)

Derivatives and Hedging Activ_7

Derivatives and Hedging Activities - Gains/(Losses) on Derivative Instruments in Fair Value and Cash Flow Accounting Hedging Relationships (Details) - USD ($)	12 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2017
Derivative Instruments, Gain (Loss) [Line Items]
Interest income/(expense), including the effects of fair value and cash flow hedges	$ 568,096,000	$ 515,807,000	$ 470,523,000
Interest income/(expense), including the effects of fair value and cash flow hedges	(68,190,000)	(62,452,000)	$ (64,969,000)
Gain/(loss) on cash flow hedging relationships:
Net income/(expense) recognized on cash flow hedges	0	$ 0
Client swap program hedges | Interest income on loans receivable | Fair value hedging
Gain/(loss) on fair value hedging relationships:
Amounts related to interest settlements on derivatives	128,000
Recognized on derivatives	(6,504,000)
Recognized on hedged items	6,479,000
Net income/(expense) recognized on fair value hedges	103,000
Client swap program hedges | Interest expense on FHLB advances | Cash flow hedging
Gain/(loss) on cash flow hedging relationships:
Amounts related to interest settlements on derivatives	(2,823,000)
Amount of derivative gain/(loss) reclassified from AOCI into interest income/expense	0
Net income/(expense) recognized on cash flow hedges	$ (2,823,000)

Derivatives and Hedging Activ_8

Derivatives and Hedging Activities - Impact of Client Swap Program that are Not Designated in Accounting Hedges (Details) $ in Thousands	12 Months Ended
	Sep. 30, 2019USD ($)
Client swap program hedges
Derivative [Line Items]
Derivative instruments not designated as hedging instruments, gain (loss), net	$ 0
Other noninterest income | Pay fixed/receive floating swap
Derivative [Line Items]
Derivative instruments not designated as hedging instruments, gain (loss), net	(33,112)
Other noninterest income | Receive fixed/pay floating swap
Derivative [Line Items]
Derivative instruments not designated as hedging instruments, gain (loss), net	$ 33,112

Revenue from Contracts with C_2

Revenue from Contracts with Customers - Additional Information (Details)	12 Months Ended
	Sep. 30, 2019
Revenue from Contract with Customer [Abstract]
Revenue streams percentage, contract with customer	5.00%

Interest Receivable (Details)

Interest Receivable (Details) - USD ($) $ in Thousands	Sep. 30, 2019	Sep. 30, 2018
Accounts, Notes, Loans and Financing Receivable [Line Items]
Interest receivable	$ 48,857	$ 47,295
Loans receivable
Accounts, Notes, Loans and Financing Receivable [Line Items]
Interest receivable	41,429	39,176
Mortgage-backed securities
Accounts, Notes, Loans and Financing Receivable [Line Items]
Interest receivable	6,107	6,404
Investment securities
Accounts, Notes, Loans and Financing Receivable [Line Items]
Interest receivable	$ 1,321	$ 1,715

Premises and Equipment (Details

Premises and Equipment (Details) - USD ($) $ in Thousands	12 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2017
Property, Plant and Equipment [Line Items]
Premises and equipment, gross	$ 443,837	$ 416,920
Less accumulated depreciation and amortization	(169,822)	(148,925)
Premises and equipment, net	274,015	267,995
Future minimum payments due, 2020	5,838
Future minimum payments due, 2021	5,246
Future minimum payments due, 2022	4,698
Future minimum payments due, 2023	4,302
Future minimum payments due, 2024	3,596
Future minimum payments due, thereafter	10,531
Rental expense	6,455	6,477	$ 5,500
Land
Property, Plant and Equipment [Line Items]
Premises and equipment, gross	117,431	110,251
Buildings
Property, Plant and Equipment [Line Items]
Premises and equipment, gross	165,088	156,803
Leasehold improvements
Property, Plant and Equipment [Line Items]
Premises and equipment, gross	22,765	22,887
Furniture, software and equipment
Property, Plant and Equipment [Line Items]
Premises and equipment, gross	$ 138,553	$ 126,979
Minimum | Buildings
Property, Plant and Equipment [Line Items]
Estimated useful life	25 years
Minimum | Leasehold improvements
Property, Plant and Equipment [Line Items]
Estimated useful life	7 years
Minimum | Furniture, software and equipment
Property, Plant and Equipment [Line Items]
Estimated useful life	2 years
Maximum | Buildings
Property, Plant and Equipment [Line Items]
Estimated useful life	40 years
Maximum | Leasehold improvements
Property, Plant and Equipment [Line Items]
Estimated useful life	15 years
Maximum | Furniture, software and equipment
Property, Plant and Equipment [Line Items]
Estimated useful life	10 years

Customer Accounts - Schedule o

Customer Accounts - Schedule of Deposits (Details) - USD ($) $ in Thousands	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2017
Deposit Account Balance
Non-interest checking	$ 1,621,343	$ 1,401,226
Interest checking	1,984,576	1,778,520
Savings	753,574	836,501
Money market	2,724,308	2,566,096
Time deposits	4,906,963	4,804,803
Customer accounts	$ 11,990,764	$ 11,387,146
As a % of Total Deposits
Non-interest checking	13.50%	12.40%
Interest checking	16.60%	15.60%
Savings	6.30%	7.30%
Money market	22.70%	22.50%
Time deposits	40.90%	42.20%
Total	100.00%	100.00%
Weighted Average Rate
Interest checking	0.61%	0.50%
Savings	0.13%	0.11%
Money market	0.82%	0.65%
Time deposits	1.91%	1.50%
Total	1.08%	0.87%	0.54%

Customer Accounts - Time Depos

Customer Accounts - Time Deposits (Details) - USD ($) $ in Thousands	Sep. 30, 2019	Sep. 30, 2018
Time deposits by rate band are as follows:
Less than 1.00%	$ 21,281	$ 629,589
1.00% to 1.99%	3,588,689	3,761,543
2.00% to 2.99%	1,294,889	413,671
3.00% to 3.99%	2,104	0
Time deposits by maturity band are as follows:
Within 1 year	3,489,839	2,800,978
1 to 2 years	925,170	1,335,242
2 to 3 years	294,990	296,238
Over 3 years	196,964	372,345
Total time deposits	4,906,963	4,804,803
Customer accounts over $250,000	$ 3,609,961	$ 3,088,231

Customer Accounts - Interest E

Customer Accounts - Interest Expense on Customer Accounts (Details) - USD ($) $ in Thousands	12 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2017
Banking and Thrift [Abstract]
Checking accounts	$ 12,499	$ 6,072	$ 2,721
Savings accounts	980	920	978
Money market accounts	21,967	7,788	3,592
Time deposit accounts	87,665	58,468	45,256
Interest expense on customer accounts, gross	123,111	73,248	52,547
Less early withdrawal penalties	(895)	(756)	(524)
Interest expense on customer accounts, net	$ 122,216	$ 72,492	$ 52,023
Weighted average interest rate at end of year	1.08%	0.87%	0.54%
Weighted daily average interest rate during the year	1.05%	0.65%	0.49%

FHLB Advances and Other Borro_3

FHLB Advances and Other Borrowings - Maturity Dates of Outstanding FHLB Advances (Details) - USD ($) $ in Thousands	Sep. 30, 2019	Sep. 30, 2018
FHLB advances
Within 1 year	$ 950,000	$ 1,680,000
1 to 3 years	750,000	300,000
3 to 5 years	400,000	200,000
More than 5 years	150,000	150,000
FHLB advances	$ 2,250,000	$ 2,330,000

FHLB Advances and Other Borro_4

FHLB Advances and Other Borrowings - Weighted Average Cost and Amount of Advances (Details) - USD ($) $ in Thousands	12 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2017
Federal Home Loan Banks [Abstract]
Weighted average interest rate, including cash flow hedges, at end of year	2.49%	2.66%	2.80%
Weighted daily average interest rate, including cash flow hedges, during the year	2.69%	2.62%	3.00%
Daily average of FHLB advances during the year	$ 2,533,890	$ 2,384,795	$ 2,167,986
Maximum amount of FHLB advances at any month end	2,665,000	2,620,000	2,350,000
Interest expense during the year (including swap interest income and expense)	$ 68,190	$ 62,452	$ 64,969

FHLB Advances and Other Borro_5

FHLB Advances and Other Borrowings - Additional Information (Details)	12 Months Ended
	Sep. 30, 2019USD ($)
Federal Home Loan Bank, Advances, Branch of FHLB Bank [Line Items]
FHLB advances callable as of August 7, 2020 and quarterly thereafter	$ 100,000,000
Federal Home Loan Bank of Des Moines
Federal Home Loan Bank, Advances, Branch of FHLB Bank [Line Items]
Federal home loan bank, percent of assets	45.00%

Income Taxes - Narrative (Detai

Income Taxes - Narrative (Details) - USD ($) $ in Thousands	12 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2017
Income Tax Disclosure [Abstract]
Statutory income tax rate	21.00%	24.53%	35.00%
Liability for uncertain tax positions	$ 0	$ 2,679
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 ($) $ in Thousands	Sep. 30, 2019	Sep. 30, 2018
Deferred tax assets
Loan loss reserves	$ 31,494	$ 31,055
REO reserves	255	518
Non-accrual loan interest	891	877
Federal and state tax credits	537	1,074
Deferred compensation	3,022	3,165
Stock based compensation	1,876	1,677
Other	2,081	1,747
Total deferred tax assets	40,156	40,113
Deferred tax liabilities
FHLB stock dividends	14,478	14,941
Valuation adjustment on available-for-sale securities and cash flow hedges	4,503	2,442
Loan origination fees and costs	8,385	9,285
Premises and equipment	25,399	23,429
Other	2,851	1,828
Total deferred tax liabilities	55,616	51,925
Net deferred tax asset (liability)	(15,460)	(11,812)
Current tax asset (liability)	10,356	13,616
Net tax asset (liability)	$ (5,104)	$ 1,804

Income Taxes - Reconciliation o

Income Taxes - Reconciliation of Effective Income Tax Rate (Details)	12 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2017
Income Tax Disclosure [Abstract]
Statutory income tax rate	21.00%	24.53%	35.00%
State income tax	2.00%	2.00%	1.00%
Impact of change in Federal income tax rate	0.00%	(2.00%)	0.00%
Other differences	(3.00%)	(4.00%)	(4.00%)
Effective income tax rate	20.00%	21.00%	32.00%

Income Taxes - Components of In

Income Taxes - Components of Income Tax Expense (Benefit) (Details) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2017	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2017
Federal:
Current									$ 46,376	$ 40,314	$ 87,804
Deferred									1,916	8,952	(10,142)
Federal									48,292	49,266	77,662
State:
Current									4,557	4,243	4,991
Deferred									(330)	(116)	31
State									4,227	4,127	5,022
Total
Current									50,933	44,557	92,795
Deferred									1,586	8,836	(10,111)
Income tax expense (benefit)	$ 12,970	$ 11,309	$ 13,873	$ 14,367	$ 15,826	$ 13,100	$ 15,502	$ 8,965	$ 52,519	$ 53,393	$ 82,684

401(k) Plan (Details)

401(k) Plan (Details) - USD ($)	9 Months Ended	12 Months Ended
	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018	Dec. 31, 2017	Sep. 30, 2017
Retirement Benefits [Abstract]
Employee contribution, percentage of annual salary		100.00%
Employee contribution, maximum allowable contribution		$ 55,000
Service period for eligibility (in years)	1 month			1 year
Employer matching contribution percent		100.00%
Percent of employees' gross pay		4.00%
Profit sharing contribution, vesting schedule (in years)		6 years
Profit sharing contribution, percent		7.00%
Company contributions to plan		$ 6,920,000	$ 5,910,000		$ 6,433,000

Stock Award Plans - Additional

Stock Award Plans - Additional Information (Details) - USD ($)	12 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2016
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares authorized to be reserved (in shares)	5,000,000
Shares available for issuance (in shares)	2,856,502
Contractual term of award (in years)	10 years
Compensation cost for stock options	$ 521,000	$ 0	$ 0
Stock Option Awards
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Options granted (in shares)	356,343	0	0
Unrecognized compensation cost for stock options, net of forfeitures	$ 1,042,000
Restricted Stock Awards
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Equity instruments other than options, nonvested (in shares)	435,838	460,999	466,681	490,363
Fair market value at date of grant at restricted stock	$ 10,342,436
Compensation cost for stock options	$ 4,188,000	$ 4,259,000	$ 3,659,000
Minimum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Award vesting period (in years)	3 years
Minimum | Restricted Stock Awards
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Award vesting period (in years)	1 year
Maximum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Award vesting period (in years)	5 years
Maximum | Restricted Stock Awards
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Award vesting period (in years)	7 years

Stock Award Plans - Option Acti

Stock Award Plans - Option Activity (Details) - USD ($) $ / shares in Units, $ in Thousands	12 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2017
Shares
Outstanding, beginning balance (in shares)	51,060
Exercised (in shares)	(22,975)
Forfeited (in shares)	(64,141)
Outstanding, ending balance (in shares)	320,287	51,060
Exercisable (in shares)	27,620
Weighted Average Exercise Price
Outstanding, beginning balance (in dollars per share)	$ 15.25
Exercised (in dollars per share)	12.99
Forfeited (in dollars per share)	27.96
Outstanding, ending balance (in dollars per share)	27.21	$ 15.25
Exercisable (in dollars per share)	$ 17.17
Share-based Compensation Arrangement by Share-based Payment Award, Options, Additional Disclosures [Abstract]
Options outstanding, weighted average remaining contractual term (in years)	8 years	2 years
Options exercisable, weighted average remaining contractual term (in years)	1 year 4 months 24 days
Options outstanding, aggregate intrinsic value	$ 3,136	$ 855
Options exercisable, aggregate intrinsic value	$ 547
Stock Option Awards
Shares
Granted (in shares)	356,343	0	0
Weighted Average Exercise Price
Granted (in dollars per share)	$ 28.16

Stock Award Plans - Other Stock

Stock Award Plans - Other Stock Option Information (Details) - USD ($) $ / shares in Units, $ in Thousands	12 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2017
Share-based Payment Arrangement [Abstract]
Compensation cost for stock options	$ 521	$ 0	$ 0
Weighted average grant date fair value per stock option (in dollars per share)	$ 5.21	$ 3.15	$ 3.06
Total intrinsic value of options exercised	$ 414	$ 908	$ 2,605
Grant date fair value of options exercised	51	285	1,328
Cash received from option exercises	$ 298	$ 1,338	$ 7,238

Stock Award Plans - Nonvested S

Stock Award Plans - Nonvested Stock Options (Details) - $ / shares	12 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2017
Options Outstanding
Outstanding at beginning of period (in shares)	0	0	0
Vested (in shares)	0	0	0
Forfeited (in shares)	(63,176)	0	0
Outstanding at end of period (in shares)	293,167	0	0
Weighted Average Grant Date Fair Value
Outstanding at beginning of period (in dollars per share)	$ 0	$ 0	$ 0
Granted (in dollars per share)	5.21	3.15	3.06
Vested (in dollars per share)	0	0	0
Forfeited (in dollars per share)	5.33	0	0
Outstanding at end of period (in dollars per share)	$ 5.33	$ 0	$ 0
Non-vested Stock Options
Options Outstanding
Granted (in shares)	356,343	0	0
Weighted Average Grant Date Fair Value
Granted (in dollars per share)	$ 5.33	$ 0	$ 0

Stock Award Plans - Nonvested R

Stock Award Plans - Nonvested Restricted Stock (Details) - Restricted Stock Awards - $ / shares	12 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2017
Outstanding
Outstanding at beginning of period (in shares)	460,999	466,681	490,363
Granted (in shares)	249,272	205,100	238,450
Vested (in shares)	(159,103)	(198,620)	(116,878)
Forfeited (in shares)	(115,330)	(12,162)	(145,254)
Outstanding at end of period (in shares)	435,838	460,999	466,681
Weighted Average Fair Value
Outstanding at beginning of period (in dollars per share)	$ 22.52	$ 18.56	$ 16
Granted (in dollars per share)	21.41	26.11	18.89
Vested (in dollars per share)	26.09	16.65	20.95
Forfeited (in dollars per share)	10.61	27	8.56
Outstanding at end of period (in dollars per share)	$ 23.73	$ 22.52	$ 18.56

Shareholders' Equity - Regulato

Shareholders' Equity - Regulatory Capital Requirements (Details) - USD ($) $ in Thousands	Sep. 30, 2019	Sep. 30, 2018
The Company
Common Equity Tier 1 risk-based capital ratio:
Actual capital	$ 1,710,147	$ 1,678,475
Actual ratio	14.30%	14.71%
Capital adequacy guidelines ratio	4.50%	4.50%
Tier 1 risk-based capital ratio:
Actual capital	$ 1,710,147	$ 1,678,475
Actual ratio	14.30%	14.71%
Capital adequacy guidelines ratio	6.00%	6.00%
Total risk-based capital ratio:
Actual capital	$ 1,848,581	$ 1,814,981
Actual ratio	15.45%	15.91%
Capital adequacy guidelines ratio	8.00%	8.00%
Tier 1 leverage ratio:
Actual capital	$ 1,710,147	$ 1,678,475
Actual ratio	10.51%	10.85%
Capital adequacy guidelines ratio	4.00%	4.00%
The Bank
Common Equity Tier 1 risk-based capital ratio:
Actual capital	$ 1,666,426	$ 1,661,628
Actual ratio	13.93%	14.55%
Capital adequacy guidelines ratio	4.50%	4.50%
Categorized as well capitalized under prompt corrective action provisions ratio	6.50%	6.50%
Tier 1 risk-based capital ratio:
Actual capital	$ 1,666,426	$ 1,661,628
Actual ratio	13.93%	14.55%
Capital adequacy guidelines ratio	6.00%	6.00%
Categorized as well capitalized under prompt corrective action provisions ratio	8.00%	8.00%
Total risk-based capital ratio:
Actual capital	$ 1,804,860	$ 1,798,135
Actual ratio	15.09%	15.75%
Capital adequacy guidelines ratio	8.00%	8.00%
Categorized as well capitalized under prompt corrective action provisions ratio	10.00%	10.00%
Tier 1 leverage ratio:
Actual capital	$ 1,666,426	$ 1,661,628
Actual ratio	10.24%	10.74%
Capital adequacy guidelines ratio	4.00%	4.00%
Categorized as well capitalized under prompt corrective action provisions ratio	5.00%	5.00%

Shareholders' Equity - Narrativ

Shareholders' Equity - Narrative (Details) - USD ($)	12 Months Ended
	Sep. 30, 2019	Sep. 30, 2018
Class of Stock [Line Items]
Stock repurchased (in shares)	4,065,837	4,868,357
Additional shares authorized to be repurchased (in shares)	7,966,761
Warrants issued (in shares)	1,707,456
Warrant exercise price (in dollars per share)	$ 17.36
Warrants repurchased during period (in shares)	102,936
Value of warrants	$ 1,081,704
Warrants outstanding (in shares)	0
Weighted average
Class of Stock [Line Items]
Weighted average cost of repurchased stock (in dollars per share)	$ 30.46	$ 33.74

Shareholders' Equity - Earnings

Shareholders' Equity - Earnings per Share (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended								12 Months Ended
	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2017	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2017
Earnings Per Share, Diluted, by Common Class, Including Two Class Method [Line Items]
Weighted average shares outstanding (in shares)									80,471,316	85,008,040	88,905,457
Weighted average diluted shares (in shares)									80,495,163	85,109,843	89,224,207
Net income	$ 52,362	$ 53,854	$ 51,098	$ 52,942	$ 51,515	$ 51,394	$ 49,271	$ 51,670	$ 210,256	$ 203,850	$ 173,532
Basic EPS (in dollars per share)	$ 0.66	$ 0.67	$ 0.63	$ 0.65	$ 0.62	$ 0.61	$ 0.58	$ 0.59	$ 2.61	$ 2.40	$ 1.95
Diluted EPS (in dollars per share)	$ 0.66	$ 0.67	$ 0.63	$ 0.65	$ 0.62	$ 0.61	$ 0.57	$ 0.59	$ 2.61	$ 2.40	$ 1.94
Warrant
Earnings Per Share, Diluted, by Common Class, Including Two Class Method [Line Items]
Weighted average dilutive warrants and options (in shares)									4,448	63,079	242,979
Equity Option
Earnings Per Share, Diluted, by Common Class, Including Two Class Method [Line Items]
Weighted average dilutive warrants and options (in shares)									19,399	38,724	75,771

Financial Information - Washi_3

Financial Information - Washington Federal, Inc. - Statements of Financial Condition (Details) - USD ($) $ in Thousands	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2016
Assets
Other assets	$ 210,989	$ 196,494
Total assets	16,474,910	15,865,724
Liabilities
Total liabilities	14,441,915	13,868,816
Shareholders’ equity
Total shareholders’ equity	2,032,995	1,996,908	$ 2,005,688	$ 1,975,731
Total liabilities and shareholders’ equity	16,474,910	15,865,724
Parent Company
Assets
Cash	38,721	20,334
Other assets	5,000	0
Investment in subsidiary	1,989,274	1,980,062
Total assets	2,032,995	2,000,396
Liabilities
Other liabilities	0	3,488
Total liabilities	0	3,488
Shareholders’ equity
Total shareholders’ equity	2,032,995	1,996,908
Total liabilities and shareholders’ equity	$ 2,032,995	$ 2,000,396

Financial Information - Washi_4

Financial Information - Washington Federal, Inc. - Statements of Operations (Details) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2017	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2017
Income
Total Income	$ 169,436	$ 171,826	$ 167,582	$ 162,622	$ 157,152	$ 155,072	$ 149,079	$ 145,780	$ 671,466	$ 607,083	$ 548,918
Expense
Income before income taxes	65,332	65,163	64,971	67,309	67,341	64,494	64,773	60,635	262,775	257,243	256,216
Income tax benefit (expense)	(12,970)	(11,309)	(13,873)	(14,367)	(15,826)	(13,100)	(15,502)	(8,965)	(52,519)	(53,393)	(82,684)
Net income	$ 52,362	$ 53,854	$ 51,098	$ 52,942	$ 51,515	$ 51,394	$ 49,271	$ 51,670	210,256	203,850	173,532
Parent Company
Income
Dividends from subsidiary									208,389	198,294	171,500
Total Income									208,389	198,294	171,500
Expense
Miscellaneous expense									448	439	435
Total expense									448	439	435
Net income (loss) before equity in undistributed net income (loss) of subsidiary									207,941	197,855	171,065
Equity in undistributed net income (loss) of subsidiaries									2,213	5,880	2,326
Income before income taxes									210,154	203,735	173,391
Income tax benefit (expense)									102	115	141
Net income									$ 210,256	$ 203,850	$ 173,532

Financial Information - Washi_5

Financial Information - Washington Federal, Inc. - Statements of Cash Flows (Details) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2017	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2017
Cash Flows From Operating Activities
Net income	$ 52,362	$ 53,854	$ 51,098	$ 52,942	$ 51,515	$ 51,394	$ 49,271	$ 51,670	$ 210,256	$ 203,850	$ 173,532
Adjustments to reconcile net income to net cash provided by operating activities:
Stock compensation expense									5,265	4,771	5,909
Decrease (increase) in other assets									(17,416)	(6,876)	7,974
Net cash provided (used) by operating activities									234,054	190,702	179,700
Cash Flows From Investing Activities
Purchase of strategic investments									(5,000)	0	0
Net cash provided (used) by investing activities									(421,373)	(674,445)	(544,536)
Cash Flows From Financing Activities
Proceeds from exercise of common stock options and related tax benefit									298	1,338	7,238
Treasury stock purchased									(123,854)	(164,249)	(98,374)
Dividends paid on common stock									(63,318)	(55,997)	(74,519)
Net cash provided (used) by financing activities									337,827	439,323	227,538
Cash at beginning of year				268,650					268,650
Cash at end of year	419,158				268,650				419,158	268,650
Parent Company
Cash Flows From Operating Activities
Net income									210,256	203,850	173,532
Adjustments to reconcile net income to net cash provided by operating activities:
Equity in undistributed net income (loss) of subsidiaries									(2,213)	(5,880)	(2,326)
Stock compensation expense									5,265	4,771	5,910
Decrease (increase) in other assets									0	0	15
Increase (decrease) in other liabilities									(3,489)	3,424	(2,699)
Net cash provided (used) by operating activities									209,819	206,165	174,432
Cash Flows From Investing Activities
Purchase of strategic investments									(5,000)	0	0
Net cash provided (used) by investing activities									(5,000)	0	0
Cash Flows From Financing Activities
Proceeds from exercise of common stock options and related tax benefit									740	1,338	7,238
Treasury stock purchased									(123,854)	(164,249)	(98,374)
Dividends paid on common stock									(63,318)	(55,997)	(74,519)
Net cash provided (used) by financing activities									(186,432)	(218,908)	(165,655)
Increase (decrease) in cash and cash equivalents									18,387	(12,743)	8,777
Cash at beginning of year				$ 20,334				$ 33,077	20,334	33,077	24,300
Cash at end of year	$ 38,721				$ 20,334				$ 38,721	$ 20,334	$ 33,077

Selected Quarterly Financial _3

Selected Quarterly Financial Data (Unaudited) (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended								12 Months Ended
	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2017	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2017
Quarterly Financial Information Disclosure [Abstract]
Interest income	$ 169,436	$ 171,826	$ 167,582	$ 162,622	$ 157,152	$ 155,072	$ 149,079	$ 145,780	$ 671,466	$ 607,083	$ 548,918
Interest expense	49,264	50,160	47,512	43,470	37,901	35,220	31,778	30,045	190,406	134,944	116,992
Net interest income	120,172	121,666	120,070	119,152	119,251	119,852	117,301	115,735	481,060	472,139	431,926
Provision (release) for loan losses	(1,900)	0	750	(500)	(5,500)	1,000	(950)	0	(1,650)	(5,450)	(2,100)
Other operating income (including REO gain (loss), net)	15,786	14,395	13,618	19,329	12,207	12,619	12,309	6,841
Other operating expense	72,526	70,898	67,967	71,672	69,617	66,977	65,787	61,941	283,063	264,322	231,519
Income before income taxes	65,332	65,163	64,971	67,309	67,341	64,494	64,773	60,635	262,775	257,243	256,216
Income tax expense	12,970	11,309	13,873	14,367	15,826	13,100	15,502	8,965	52,519	53,393	82,684
Net income	$ 52,362	$ 53,854	$ 51,098	$ 52,942	$ 51,515	$ 51,394	$ 49,271	$ 51,670	$ 210,256	$ 203,850	$ 173,532
Basic earnings per share (in dollars per share)	$ 0.66	$ 0.67	$ 0.63	$ 0.65	$ 0.62	$ 0.61	$ 0.58	$ 0.59	$ 2.61	$ 2.40	$ 1.95
Diluted earnings per share (in dollars per share)	0.66	0.67	0.63	0.65	0.62	0.61	0.57	0.59	2.61	2.40	1.94
Cash dividends per share (in dollars per share)	$ 0.21	$ 0.20	$ 0.20	$ 0.18	$ 0.18	$ 0.17	$ 0.17	$ 0.15	$ 0.79	$ 0.67	$ 0.84