ESSA Bancorp (ESSA) 10-Q 12 May 23 2023 Q2 Quarterly report Financial data

Document and Entity Information

Document and Entity Information - shares	6 Months Ended
	Mar. 31, 2023	May 10, 2023
Cover [Abstract]
Document Type	10-Q
Amendment Flag	false
Document Period End Date	Mar. 31, 2023
Document Fiscal Year Focus	2023
Document Fiscal Period Focus	Q2
Trading Symbol	ESSA
Entity Registrant Name	ESSA Bancorp, Inc.
Entity Central Index Key	0001382230
Current Fiscal Year End Date	--09-30
Entity Filer Category	Non-accelerated Filer
Entity Small Business	true
Entity Emerging Growth Company	false
Entity Current Reporting Status	Yes
Entity Shell Company	false
Entity Common Stock, Shares Outstanding		10,402,353
Entity File Number	001-33384
Entity Tax Identification Number	20-8023072
Entity Address, Address Line One	200 Palmer Street
Entity Address, City or Town	Stroudsburg
Entity Address, State or Province	PA
Entity Address, Postal Zip Code	18360
City Area Code	570
Local Phone Number	421-0531
Entity Interactive Data Current	Yes
Title of 12(b) Security	Common
Security Exchange Name	NASDAQ
Entity Incorporation, State or Country Code	PA
Document Quarterly Report	true
Document Transition Report	false

Consolidated Balance Sheet (Una

Consolidated Balance Sheet (Unaudited) - USD ($) $ in Thousands	Mar. 31, 2023	Sep. 30, 2022
ASSETS
Cash and due from banks	$ 18,330	$ 19,970
Interest-bearing deposits with other institutions	6,211	7,967
Total cash and cash equivalents	24,541	27,937
Investment securities available for sale, at fair value	203,290	208,647
Investment securities held to maturity, at amortized cost	54,904	57,285
Loans receivable (net of allowance for loan losses of $18,315 and $18,528)	1,569,338	1,435,783
Regulatory stock, at cost	17,083	14,393
Premises and equipment, net	13,136	13,126
Bank-owned life insurance	38,626	38,240
Foreclosed real estate	3,546	29
Intangible assets, net	186	281
Goodwill	13,801	13,801
Deferred income taxes	5,108	5,375
Derivative and hedging assets	18,284	24,481
Other assets	23,676	22,439
TOTAL ASSETS	1,985,519	1,861,817
LIABILITIES
Deposits	1,429,297	1,380,021
Short-term borrowings	301,478	230,810
Advances by borrowers for taxes and insurance	12,776	11,803
Derivative and hedging liabilities	6,913	9,176
Other liabilities	16,256	17,670
TOTAL LIABILITIES	1,766,720	1,649,480
STOCKHOLDERS’ EQUITY
Preferred stock ($0.01 par value; 10,000,000 shares authorized, none issued)
Common stock ($0.01 par value; 40,000,000 shares authorized, 18,133,095 issued; 10,402,537 and 10,371,022 outstanding at March 31, 2023 and September 30, 2022, respectively)	181	181
Additional paid in capital	182,377	182,173
Unallocated common stock held by the Employee Stock Ownership Plan (ESOP)	(6,236)	(6,462)
Retained earnings	145,762	139,139
Treasury stock, at cost; 7,730,558 and 7,762,073 shares outstanding at March 31, 2023 and September 30, 2022, respectively	(99,401)	(99,800)
Accumulated other comprehensive loss	(3,884)	(2,894)
TOTAL STOCKHOLDERS’ EQUITY	218,799	212,337
TOTAL LIABILITIES AND STOCKHOLDERS’ EQUITY	$ 1,985,519	$ 1,861,817

Consolidated Balance Sheet (U_2

Consolidated Balance Sheet (Unaudited) (Parenthetical) - USD ($) $ in Thousands	Mar. 31, 2023	Sep. 30, 2022
Statement Of Financial Position [Abstract]
Allowance for loan losses	$ 18,315	$ 18,528
Preferred stock, par value	$ 0.01	$ 0.01
Preferred stock, shares authorized	10,000,000	10,000,000
Preferred stock, shares issued	0	0
Common stock, par value	$ 0.01	$ 0.01
Common stock, shares authorized	40,000,000	40,000,000
Common stock, shares issued	18,133,095	18,133,095
Common stock, shares outstanding	10,402,537	10,371,022
Treasury stock, shares outstanding	7,730,558	7,762,073

Consolidated Statement of Opera

Consolidated Statement of Operations (Unaudited) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Mar. 31, 2023	Mar. 31, 2022	Mar. 31, 2023	Mar. 31, 2022
INTEREST INCOME
Loans receivable, including fees	$ 17,504	$ 13,590	$ 33,589	$ 26,849
Investment securities:
Taxable	2,096	1,169	4,187	2,180
Exempt from federal income tax	10	19	21	38
Other investment income	444	130	876	249
Total interest income	20,054	14,908	38,673	29,316
INTEREST EXPENSE
Deposits	3,817	693	5,818	1,539
Short-term borrowings	1,127		2,085
Total interest expense	4,944	693	7,903	1,539
NET INTEREST INCOME	15,110	14,215	30,770	27,777
Provision for loan losses	150		300
NET INTEREST INCOME AFTER PROVISION FOR LOAN LOSSES	14,960	14,215	30,470	27,777
NONINTEREST INCOME
Service fees on deposit accounts	762	735	1,561	1,518
Services charges and fees on loans	330	411	697	828
Loan swap fees	136	2	138	149
Unrealized (loss) gain on equity securities, net	(5)		(3)	1
Trust and investment fees	403	420	805	846
Gain on sale of loans, net		20	58	239
Earnings on bank-owned life insurance	195	187	386	380
Insurance commissions	168	141	314	288
Other	22	36	28	31
Total noninterest income	2,069	1,952	3,984	4,280
NONINTEREST EXPENSE
Compensation and employee benefits	6,792	6,305	13,532	12,639
Occupancy and equipment	1,109	1,174	2,155	2,268
Professional fees	1,115	745	2,358	1,440
Data processing	1,222	1,151	2,401	2,331
Advertising	168	280	354	373
Federal Deposit Insurance Corporation (FDIC) premiums	180	120	368	284
Gain on foreclosed real estate		(89)	(3)	(120)
Amortization of intangible assets	48	65	95	132
Other	658	647	1,466	1,355
Total noninterest expense	11,292	10,398	22,726	20,702
Income before income taxes	5,737	5,769	11,728	11,355
Income taxes	1,052	1,177	2,177	2,150
NET INCOME	$ 4,685	$ 4,592	$ 9,551	$ 9,205
Earnings per share
Basic	$ 0.48	$ 0.47	$ 0.98	$ 0.94
Diluted	0.48	0.47	0.98	0.94
Dividends per share	$ 0.15	$ 0.12	$ 0.30	$ 0.24

Consolidated Statement of Compr

Consolidated Statement of Comprehensive Income (Unaudited) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Mar. 31, 2023	Mar. 31, 2022	Mar. 31, 2023	Mar. 31, 2022
Statement Of Income And Comprehensive Income [Abstract]
Net income	$ 4,685	$ 4,592	$ 9,551	$ 9,205
Investment securities available for sale:
Unrealized holding gains (losses)	1,616	(5,258)	2,677	(6,324)
Tax effect	(339)	1,105	(562)	1,328
Net of tax amount	1,277	(4,153)	2,115	(4,996)
Pension plan:
Changes in unrealized holding (losses) gains		(68)		897
Tax effect		14		(187)
Reclassification of items recognized in net income		84		223
Tax effect		(18)		(48)
Net of tax amount		12		885
Derivative and hedging activities adjustments:
Changes in unrealized holding (losses) gains on derivatives included in net income	(475)	6,826	193	8,965
Tax effect	101	(1,434)	(40)	(1,883)
Reclassification adjustment for (gains) losses on derivatives included in net income	(2,293)	166	(4,127)	402
Tax effect	483	(35)	869	(84)
Net of tax amount	(2,184)	5,523	(3,105)	7,400
Total other comprehensive (loss) income	(907)	1,382	(990)	3,289
Comprehensive income	$ 3,778	$ 5,974	$ 8,561	$ 12,494

Consolidated Statement of Chang

Consolidated Statement of Changes in Stockholders' Equity (Unaudited) - USD ($) $ in Thousands	Total	Common Stock [Member]	Additional Paid-In Capital [Member]	Unallocated Common Stock Held by the ESOP [Member]	Retained Earnings [Member]	Treasury Stock [Member]	Accumulated Other Comprehensive (Loss) Income [Member]
Beginning Balance at Sep. 30, 2021	$ 201,822	$ 181	$ 181,659	$ (6,915)	$ 124,342	$ (98,127)	$ 682
Beginning Balance, Shares at Sep. 30, 2021		10,461,443
Net income	9,205				9,205
Other comprehensive income (loss)	3,289						3,289
Cash dividends declared	(2,346)				(2,346)
Stock based compensation	355		355
Allocation of ESOP stock	391		165	226
Allocation of treasury shares to incentive plan	(3)		(363)			360
Allocation of treasury shares to incentive plan, Shares		27,948
Ending Balance at Mar. 31, 2022	212,713	$ 181	181,816	(6,689)	131,201	(97,767)	3,971
Ending Balance, Shares at Mar. 31, 2022		10,489,391
Beginning Balance at Dec. 31, 2021	207,619	$ 181	181,634	(6,802)	127,784	(97,767)	2,589
Beginning Balance, Shares at Dec. 31, 2021		10,489,391
Net income	4,592				4,592
Other comprehensive income (loss)	1,382						1,382
Cash dividends declared	(1,175)				(1,175)
Stock based compensation	93		93
Allocation of ESOP stock	202		89	113
Ending Balance at Mar. 31, 2022	212,713	$ 181	181,816	(6,689)	131,201	(97,767)	3,971
Ending Balance, Shares at Mar. 31, 2022		10,489,391
Beginning Balance at Sep. 30, 2022	$ 212,337	$ 181	182,173	(6,462)	139,139	(99,800)	(2,894)
Beginning Balance, Shares at Sep. 30, 2022	10,371,022	10,371,022
Net income	$ 9,551				9,551
Other comprehensive income (loss)	(990)						(990)
Cash dividends declared	(2,928)				(2,928)
Stock based compensation	386		386
Allocation of ESOP stock	447		221	226
Allocation of treasury shares to incentive plan	(4)		(403)			399
Allocation of treasury shares to incentive plan, Shares		31,515
Ending Balance at Mar. 31, 2023	$ 218,799	$ 181	182,377	(6,236)	145,762	(99,401)	(3,884)
Ending Balance, Shares at Mar. 31, 2023	10,402,537	10,402,537
Beginning Balance at Dec. 31, 2022	$ 216,178	$ 181	182,182	(6,349)	142,542	(99,401)	(2,977)
Beginning Balance, Shares at Dec. 31, 2022		10,401,870
Net income	4,685				4,685
Other comprehensive income (loss)	(907)						(907)
Cash dividends declared	(1,465)				(1,465)
Stock based compensation	91		91
Allocation of ESOP stock	217		104	113
Allocation of treasury shares to incentive plan, Shares		667
Ending Balance at Mar. 31, 2023	$ 218,799	$ 181	$ 182,377	$ (6,236)	$ 145,762	$ (99,401)	$ (3,884)
Ending Balance, Shares at Mar. 31, 2023	10,402,537	10,402,537

Consolidated Statement of Cha_2

Consolidated Statement of Changes in Stockholders' Equity (Unaudited) (Parenthetical) - $ / shares	3 Months Ended		6 Months Ended
	Mar. 31, 2023	Mar. 31, 2022	Mar. 31, 2023	Mar. 31, 2022
Cash dividends declared, per share	$ 0.15	$ 0.12	$ 0.30	$ 0.24
Retained Earnings [Member]
Cash dividends declared, per share	$ 0.15	$ 0.12	$ 0.30	$ 0.24

Consolidated Statement of Cash

Consolidated Statement of Cash Flows (Unaudited) - USD ($) $ in Thousands	6 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
OPERATING ACTIVITIES
Net income	$ 9,551	$ 9,205
Adjustments to reconcile net income to net cash provided by operating activities:
Provision for loan losses	300
Provision for depreciation and amortization	555	532
Amortization and accretion of discounts and premiums, net	46	(456)
Unrealized loss (gain) on equity securities	3	(1)
Gain on sale of loans, net	(58)	(239)
Origination of residential real estate loans for sale	(3,386)	(12,932)
Proceeds on sale of residential real estate loans	3,444	13,552
Compensation expense on ESOP	447	391
Amortization of right-of-use asset	436	417
Stock based compensation	386	355
Increase in accrued interest receivable	(2,711)	(58)
Increase (decrease) in accrued interest payable	919	(99)
Earnings on bank-owned life insurance	(386)	(380)
Deferred federal income taxes	306	451
Increase in accrued pension	(156)	(195)
Gain on foreclosed real estate, net	(3)	(120)
Amortization of intangible assets	95	132
Other, net	(826)	(2,081)
Net cash provided by operating activities	8,962	8,474
Investment securities available for sale:
Proceeds from principal repayments and maturities	9,742	114,698
Purchases	(2,000)	(44,192)
Investment securities held to maturity:
Proceeds from principal repayments and maturities	2,381	2,366
Purchases		(41,257)
(Increase) decrease in loans receivable, net	(137,154)	1,342
Redemption of regulatory stock	13,534	198
Purchase of regulatory stock	(16,224)	(542)
Proceeds from sale of foreclosed real estate	32	530
Purchase of premises, equipment and software, net	(658)	(378)
Net cash (used for) provided by investing activities	(130,347)	32,765
FINANCING ACTIVITIES
Increase (decrease) in deposits, net	49,276	(15,209)
Net increase in short-term borrowings	70,668
Increase in advances by borrowers for taxes and insurance	973	7,567
Dividends on common stock	(2,928)	(2,346)
Net cash provided by (used for) financing activities	117,989	(9,988)
(Decrease) increase in cash and cash equivalents	(3,396)	31,251
CASH AND CASH EQUIVALENTS AT BEGINNING OF YEAR	27,937	158,946
CASH AND CASH EQUIVALENTS AT END OF YEAR	24,541	190,197
Cash Paid:
Interest	6,984	1,638
Income taxes	2,150	1,650
Noncash items:
Transfers from loans to foreclosed real estate	3,546	34
Initial recognition of Operating Right-of-Use Asset		520
Initial recognition of Operating Right-of-Use Liability		520
Unrealized holding gains (losses)	$ 2,677	$ (6,324)

Nature of Operations and Basis

Nature of Operations and Basis of Presentation	6 Months Ended
	Mar. 31, 2023
Organization Consolidation And Presentation Of Financial Statements [Abstract]
Nature of Operations and Basis of Presentation	1. Nature of Operations and Basis of Presentation The consolidated financial statements include the accounts of ESSA Bancorp, Inc. (the “Company”), its wholly owned subsidiary, ESSA Bank & Trust (the “Bank”), and the Bank’s wholly owned subsidiaries, ESSACOR Inc.; Pocono Investments Company; ESSA Advisory Services, LLC; Integrated Financial Corporation; and Integrated Abstract Incorporated, a wholly owned subsidiary of Integrated Financial Corporation. The primary purpose of the Company is to act as a holding company for the Bank. The Bank’s primary business consists of the taking of deposits and granting of loans to customers generally in Monroe, Northampton, Lehigh, Delaware, Chester, Montgomery, Lackawanna, and Luzerne Counties, Pennsylvania. The Bank is a Pennsylvania chartered savings bank and is subject to regulation and supervision by the Pennsylvania Department of Banking and Securities and the Federal Deposit Insurance Corporation (the “FDIC”). The investment in the Bank on the parent company’s financial statements is carried at the parent company’s equity in the underlying net assets. ESSACOR, Inc. is a Pennsylvania corporation that has been used to purchase properties at tax sales that represent collateral for delinquent loans of the Bank. Pocono Investment Company is a Delaware corporation formed as an investment company subsidiary to hold and manage certain investments, including certain intellectual property. ESSA Advisory Services, LLC is a Pennsylvania limited liability company wholly owned by ESSA Bank & Trust. ESSA Advisory Services, LLC is a full-service insurance benefits consulting company offering group services such as health insurance, life insurance, short-term and long-term disability, dental, vision, and 401(k) retirement planning as well as individual health products. Integrated Financial Corporation is a Pennsylvania corporation that provided investment advisory services to the general public and is currently inactive. Integrated Abstract Incorporated is a Pennsylvania corporation that provided title insurance services and is currently inactive. All significant intercompany accounts and transactions have been eliminated in consolidation. The unaudited consolidated financial statements reflect all adjustments, which in the opinion of management, are necessary for a fair presentation of the results of the interim periods and are of a normal and recurring nature. Operating results for the six month period ended March 31, 2023 are not necessarily indicative of the results that may be expected for the year ending September 30, 2023.

Earnings per Share

Earnings per Share	6 Months Ended
	Mar. 31, 2023
Earnings Per Share [Abstract]
Earnings per Share	2. Earnings per Share The following table sets forth the composition of the weighted-average common shares (denominator) used in the basic and diluted earnings per share computation for the three and six month periods ended March 31, 2023 and 2022. Three Months Ended Six Months Ended March 31, March 31, March 31, March 31, 2023 2022 2023 2022 Weighted-average common shares outstanding 18,133,095 18,133,095 18,133,095 18,133,095 Average treasury stock shares ( 7,730,573 ) ( 7,652,070 ) ( 7,732,689 ) ( 7,643,766 ) Average unearned ESOP shares ( 637,547 ) ( 661,946 ) ( 643,266 ) ( 667,665 ) Average unearned non-vested shares ( 47,031 ) ( 52,850 ) ( 49,803 ) ( 53,605 ) Weighted average common shares and common stock 9,717,944 9,766,229 9,707,337 9,768,059 Additional common stock equivalents (nonvested stock) 2,674 2,603 3,358 2,834 Weighted average common shares and common stock 9,720,618 9,768,832 9,710,695 9,770,893 At March 31, 2023 there were no shares of nonvested stock outstanding that were not included in the computation of diluted earnings per share. At March 31, 2022 there were 29,974 shares of nonvested stock outstanding at an average weighted price of $ 16.47 per share that were not included in the computation of diluted earnings per share because to do so would have been anti-dilutive.

Use of Estimates in the Prepara

Use of Estimates in the Preparation of Financial Statements	6 Months Ended
	Mar. 31, 2023
Text Block [Abstract]
Use of Estimates in the Preparation of Financial Statements	3. Use of Estimates in the Preparation of Financial Statements The accounting principles followed by the Company and its subsidiaries and the methods of applying these principles conform to U.S. generally accepted accounting principles (“GAAP”) and to general practice within the banking industry. In preparing the consolidated financial statements, management is required to make estimates and assumptions that affect the reported amounts of assets and liabilities as of the Consolidated Balance Sheet date and related revenues and expenses for the period. Actual results could differ from those estimates.

Accounting Pronouncements

Accounting Pronouncements	6 Months Ended
	Mar. 31, 2023
Accounting Changes And Error Corrections [Abstract]
Accounting Pronouncements	4. Accounting Pronouncements Recent Accounting Pronouncements In June 2016, the FASB issued ASU 2016-13, Financial Instruments – Credit Losses: Measurement of Credit Losses on Financial Instruments , which changes the impairment model for most financial assets. This Update is intended to improve financial reporting by requiring timelier recording of credit losses on loans and other financial instruments held by financial institutions and other organizations. The underlying premise of the Update is that financial assets measured at amortized cost should 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 allowance for credit losses should reflect management’s current estimate of credit losses that are expected to occur over the remaining life of a financial asset. The income statement will be effected for the measurement of credit losses for newly recognized financial assets, as well as the expected increases or decreases of expected credit losses that have taken place during the period. ASU 2016-13 is effective for annual and interim periods beginning after December 15, 2019, and early adoption is permitted for annual and interim periods beginning after December 15, 2018. With certain exceptions, transition to the new requirements will be through a cumulative effect adjustment to opening retained earnings as of the beginning of the first reporting period in which the guidance is adopted. In November 2019, the FASB issued ASU 2019-10, Financial Instruments ‒ Credit Losses (Topic 326), Derivatives and Hedging (Topic 815), and Leases (Topic 842) . This Update defers the effective date of ASU 2016-13 for SEC filers that are eligible to be smaller reporting companies, non-SEC filers, and all other companies to fiscal years beginning after December 15, 2022, including interim periods within those fiscal years. We expect to recognize a one-time cumulative effect adjustment to the allowance for loan losses as of the beginning of the first reporting period in which the new standard is effective, but cannot yet determine the magnitude of any such one-time adjustment or the overall impact of the new guidance on the consolidated financial statements. In May 2019, the FASB issued ASU 2019-05, Financial Instruments – Credit Losses (Topic 326) , which allows entities to irrevocably elect the fair value option for certain financial assets previously measured at amortized cost upon adoption of the new credit losses standard. To be eligible for the transition election, the existing financial asset must otherwise be both within the scope of the new credit losses standard and eligible for applying the fair value option in ASC 825-10.3. The election must be applied on an instrument-by-instrument basis and is not available for either available-for-sale or held-to-maturity debt securities. For entities that elect the fair value option, the difference between the carrying amount and the fair value of the financial asset would be recognized through a cumulative-effect adjustment to opening retained earnings as of the date an entity adopted ASU 2016-13. Changes in fair value of that financial asset would subsequently be reported in current earnings. For entities that have not yet adopted the credit losses standard, the ASU is effective when they implement the credit losses standard. For entities that already have adopted the credit losses standard, the ASU is effective for fiscal years beginning after December 15, 2019, including interim periods within those fiscal years. The Company qualifies as a smaller reporting company and does not expect to early adopt ASU 2016-13. In November 2019, the FASB issued ASU 2019-11, Codification Improvements to Topic 326, Financial Instruments – Credit Losses , to clarify its new credit impairment guidance in ASC 326, based on implementation issues raised by stakeholders. This Update clarified, among other things, that expected recoveries are to be included in the allowance for credit losses for these financial assets; an accounting policy election can be made to adjust the effective interest rate for existing troubled debt restructurings based on the prepayment assumptions instead of the prepayment assumptions applicable immediately prior to the restructuring event; and extends the practical expedient to exclude accrued interest receivable from all additional relevant disclosures involving amortized cost basis. For entities that have not yet adopted ASU 2016-13 as of November 26, 2019, the effective dates for ASU 2019-11 are the same as the effective dates and transition requirements in ASU 2016-13. For entities that have adopted ASU 2016-13, ASU 2019-11 is effective for fiscal years beginning after December 15, 2019, including interim periods within those fiscal years. The Company qualifies as a smaller reporting company and does not expect to early adopt these ASUs. In March 2020, the FASB issued ASU 2020-3 , Codification Improvements to Financial Instruments. This ASU was issued to improve and clarify various financial instruments topics, including the current expected credit losses (CECL) standard issued in 2016. The ASU includes seven issues that describe the areas of improvement and the related amendments to GAAP; they are intended to make the standards easier to understand and apply and to eliminate inconsistencies, and they are narrow in scope and are not expected to significantly change practice for most entities. Among its provisions, the ASU clarifies that all entities, other than public business entities that elected the fair value option, are required to provide certain fair value disclosures under ASC 825, Financial Instruments , in both interim and annual financial statements. It also clarifies that the contractual term of a net investment in a lease under Topic 842 should be the contractual term used to measure expected credit losses under Topic 326. Amendments related to ASU 2019-04 are effective for fiscal years beginning after December 15, 2019, including interim periods within those fiscal years. Early adoption is not permitted before an entity’s adoption of ASU 2016-01. Amendments related to ASU 2016-13 for entities that have not yet adopted that guidance are effective upon adoption of the amendments in ASU 2016-13. Early adoption is not permitted before an entity’s adoption of ASU 2016-13. Amendments related to ASU 2016-13 for entities that have adopted that guidance are effective for fiscal years beginning after December 15, 2019, including interim periods within those years. Other amendments are effective upon issuance of this ASU. This Update is not expected to have a significant impact on the Company’s financial statements. In March 2022, the FASB issued ASU 2022-01 , Derivatives and Hedging (ASC 815): Fair Value Hedging - Portfolio Layer Method . ASC 815 currently permits only prepayable financial assets and one or more beneficial interests secured by a portfolio of prepayable financial instruments to be included in a last-of-layer closed portfolio. The amendments in this Update allow non-prepayable financial assets to also be included in a closed portfolio hedged using the portfolio layer method. That expanded scope permits an entity to apply the same portfolio hedging method to both prepayable and non-prepayable financial assets, thereby allowing consistent accounting for similar hedges. The guidance is effective for public business entities for fiscal years, and interim periods within those fiscal years, beginning after December 15, 2022. The Company is currently evaluating the impact the adoption of the standard will have on the Company’s financial position or results of operations. In March 2022, the FASB issued ASU 2022-02, Financial Instruments - Credit Losses (ASC 326): Troubled Debt Restructurings (TDRs) and Vintage Disclosures . The guidance amends ASC 326 to eliminate the accounting guidance for TDRs by creditors, while enhancing disclosure requirements for certain loan refinancing and restructuring activities by creditors when a borrower is experiencing financial difficulty. Specifically, rather than applying TDR recognition and measurement guidance, creditors will determine whether a modification results in a new loan or continuation of existing loan. These amendments are intended to enhance existing disclosure requirements and introduce new requirements related to certain modifications of receivables made to borrowers experiencing financial difficulty. Additionally, the amendments to ASC 326 require that an entity disclose current-period gross writeoffs by year of origination within the vintage disclosures, which requires that an entity disclose the amortized cost basis of financing receivables by credit quality indicator and class of financing receivable by year of origination. The guidance is only for entities that have adopted the amendments in Update 2016-13 for fiscal years, and interim periods within those fiscal years, beginning after December 15, 2022. Early adoption using prospective application, including adoption in an interim period where the guidance should be applied as of the beginning of the fiscal year. The Company is currently evaluating the impact the adoption of the standard will have on the Company’s financial position or results of operations. In March 2023, the FASB issued ASU No. 2023-02, " Investments—Equity Method and Joint Ventures (Topic 323): Accounting for Investments in Tax Credit Structures Using the Proportional Amortization Method (a consensus of the Emerging Issues Task Force) ". The ASU allows entities to elect the proportional amortization method, on a tax-credit-program-by-tax-credit-program basis, for all equity investments in tax credit programs meeting the eligibility criteria in Accounting Standards Codification (ASC) 323-740-25-1. While the ASU does not significantly alter the existing eligibility criteria, it does provide clarifications to address existing interpretive issues. It also prescribes specific information reporting entities must disclose about tax credit investments each period. This ASU is effective for reporting periods beginning after December 15, 2023, for public business entities, or January 1, 2024 for the Company. The Company does not expect the adoption of this ASU to have a material impact on the Company's financial statements.

Investment Securities

Investment Securities	6 Months Ended
	Mar. 31, 2023
Investments Debt And Equity Securities [Abstract]
Investment Securities	5. Investment Securities The amortized cost, gross unrealized gains and losses, and fair value of investment securities are summarized as follows (in thousands): March 31, 2023 Amortized Gross Gross Fair Value Available for Sale Fannie Mae $ 57,532 $ 27 $ ( 3,870 ) $ 53,689 Freddie Mac 50,946 — ( 3,051 ) 47,895 Governmental National Mortgage Association 5,012 — ( 215 ) 4,797 Total mortgage-backed securities 113,490 27 ( 7,136 ) 106,381 Obligations of states and political subdivisions 10,805 — ( 637 ) 10,168 U.S. government agency securities 9,508 — ( 135 ) 9,373 Corporate obligations 76,504 — ( 6,446 ) 70,058 Other debt securities 7,877 — ( 567 ) 7,310 Total $ 218,184 $ 27 $ ( 14,921 ) $ 203,290 Held to Maturity Fannie Mae $ 29,204 $ - $ ( 4,235 ) $ 24,969 Freddie Mac 23,258 - ( 3,442 ) 19,816 Total mortgage-backed securities 52,462 - ( 7,677 ) 44,785 U.S. government agency securities 2,442 - ( 392 ) 2,050 Total $ 54,904 $ - $ ( 8,069 ) $ 46,835 September 30, 2022 Amortized Gross Gross Fair Value Available for sale Fannie Mae $ 61,118 $ 1 $ ( 5,432 ) $ 55,687 Freddie Mac 53,842 - ( 4,532 ) 49,310 Governmental National Mortgage Association securities 5,411 - ( 248 ) 5,163 Total mortgage-backed securities 120,371 1 ( 10,212 ) 110,160 Obligations of states and political subdivisions 10,815 - ( 895 ) 9,920 U.S. government agency securities 9,530 - ( 200 ) 9,330 Corporate obligations 76,692 14 ( 5,587 ) 71,119 Other debt securities 8,810 2 ( 694 ) 8,118 Total debt securities $ 226,218 $ 17 $ ( 17,588 ) $ 208,647 Held to maturity Fannie Mae $ 30,659 $ - $ ( 5,127 ) $ 25,532 Freddie Mac 24,187 - ( 4,142 ) 20,045 Total 54,846 - ( 9,269 ) 45,577 U.S. government agency securities 2,439 - ( 470 ) 1,969 Total debt securities $ 57,285 $ - $ ( 9,739 ) $ 47,546 The following is a summary of unrealized and realized gains and losses recognized in net income on equity securities during the three and six months ended March 31, 2023 and 2022. (in thousands) Three Months Ended March 31, 2023 Three Months Ended March 31, 2022 Net (losses) gains recognized during the period on equity securities $ ( 5 ) $ - Less: Net (losses) gains recognized during the period on equity securities sold - - Unrealized (losses) gains recognized during the reporting period on equity $ ( 5 ) $ - (in thousands) Six Months Ended March 31, 2023 Six Months Ended March 31, 2022 Net (losses) gains recognized during the period on equity securities $ ( 3 ) $ 1 Less: Net (losses) gains recognized during the period on equity securities sold - - Unrealized (losses) gains recognized during the reporting period on equity $ ( 3 ) $ 1 The amortized cost and fair value of debt securities at March 31, 2023, by contractual maturity, are shown below. Expected maturities will differ from contractual maturities because borrowers may have the right to call or prepay obligations with or without call or prepayment penalties (in thousands): Available For Sale Held to Maturity Amortized Fair Value Amortized Fair Value Due in one year or less $ 8,255 $ 8,208 $ — $ — Due after one year through five years 37,005 35,420 — — Due after five years through ten years 70,502 63,997 7,487 6,553 Due after ten years 102,422 95,665 47,417 40,282 Total $ 218,184 $ 203,290 $ 54,904 $ 46,835 For the three and six months ended March 31, 2023 and 2022, the Company realized no gross gains or gross losses on proceeds from the sale on investment securities. The following tables show the Company’s gross unrealized losses and fair value, aggregated by investment category and length of time that the individual securities have been in a continuous unrealized loss position (dollars in thousands): March 31, 2023 Number of Less than Twelve Twelve Months or Total Fair Gross Fair Gross Fair Gross Fannie Mae 75 $ 19,523 $ ( 822 ) $ 57,252 $ ( 7,283 ) $ 76,775 $ ( 8,105 ) Freddie Mac 63 26,083 ( 964 ) 41,628 ( 5,529 ) 67,711 ( 6,493 ) Governmental National Mortgage 13 925 ( 22 ) 3,872 ( 193 ) 4,797 ( 215 ) U.S. government agency securities 3 9,373 ( 135 ) 2,050 ( 392 ) 11,423 ( 527 ) Obligations of states and political 12 1,699 ( 17 ) 8,469 ( 620 ) 10,168 ( 637 ) Corporate obligations 91 22,920 ( 1,242 ) 47,138 ( 5,204 ) 70,058 ( 6,446 ) Other debt securities 17 - - 6,894 ( 567 ) 6,894 ( 567 ) Total 274 $ 80,523 $ ( 3,202 ) $ 167,303 $ ( 19,788 ) $ 247,826 $ ( 22,990 ) September 30, 2022 Less than Twelve Twelve Months or Greater Total Number of Fair Gross Fair Gross Fair Gross Fannie Mae 74 $ 67,101 $ ( 8,344 ) $ 13,759 $ ( 2,215 ) $ 80,860 $ ( 10,559 ) Freddie Mac 63 59,954 ( 6,868 ) 9,401 ( 1,806 ) 69,355 ( 8,674 ) Governmental National Mortgage 13 2,924 ( 194 ) 2,182 ( 54 ) 5,106 ( 248 ) Obligations of states and political 12 9,920 ( 895 ) - - 9,920 ( 895 ) U.S. government agency securities 4 11,299 ( 670 ) - - 11,299 ( 670 ) Corporate obligations 88 49,333 ( 3,394 ) 19,773 ( 2,193 ) 69,106 ( 5,587 ) Other debt securities 17 5,764 ( 610 ) 1,759 ( 84 ) 7,523 ( 694 ) Total 271 $ 206,295 $ ( 20,975 ) $ 46,874 $ ( 6,352 ) $ 253,169 $ ( 27,327 ) The Company’s investment securities portfolio contains unrealized losses on securities, including mortgage-related instruments issued or backed by the full faith and credit of the United States government, or generally viewed as having the implied guarantee of the U.S. government, other mortgage backed securities, debt obligations of a U.S. state or political subdivision, U.S. government agency securities, corporate obligations, other debt securities and equity securities. The Company reviews its position quarterly and has asserted that at March 31, 2023, the declines outlined in the above table represent temporary declines and the Company would not be required to sell the above securities before their anticipated recovery in market value. The Company has concluded that any impairment of its investment securities portfolio is not other than temporary but is the result of interest rate changes that are not expected to result in the non-collection of principal and interest during the period.

Loans Receivable, Net and Allow

Loans Receivable, Net and Allowance for Loan Losses	6 Months Ended
	Mar. 31, 2023
Receivables [Abstract]
Loans Receivable, Net and Allowance for Loan Losses	6. Loans Receivable, Net and Allowance for Loan Losses Loans receivable consist of the following (in thousands): March 31, 2023 September 30, 2022 Real estate loans: Residential $ 671,357 $ 623,375 Construction 27,572 25,024 Commercial 748,379 678,841 Commercial 44,823 38,158 Obligations of states and political subdivisions 48,044 40,416 Home equity loans and lines of credit 43,623 43,170 Auto loans 1,499 3,611 Other 2,356 1,716 1,587,653 1,454,311 Less allowance for loan losses 18,315 18,528 Net loans $ 1,569,338 $ 1,435,783 The following tables show the amount of loans in each category that were individually and collectively evaluated for impairment at the dates indicated (in thousands): Total Loans Individually Collectively March 31, 2023 Real estate loans: Residential $ 671,357 $ 1,217 $ 670,140 Construction 27,572 - 27,572 Commercial 748,379 8,073 740,306 Commercial 44,823 919 43,904 Obligations of states and political subdivisions 48,044 - 48,044 Home equity loans and lines of credit 43,623 32 43,591 Auto loans 1,499 2 1,497 Other 2,356 4 2,352 Total $ 1,587,653 $ 10,247 $ 1,577,406 Total Loans Individually Collectively September 30, 2022 Real estate loans: Residential $ 623,375 $ 1,342 $ 622,033 Construction 25,024 - 25,024 Commercial 678,841 12,165 666,676 Commercial 38,158 937 37,221 Obligations of states and political subdivisions 40,416 - 40,416 Home equity loans and lines of credit 43,170 36 43,134 Auto loans 3,611 16 3,595 Other 1,716 6 1,710 Total $ 1,454,311 $ 14,502 $ 1,439,809 The Company maintains a loan review system that allows for a periodic review of our loan portfolio and the early identification of potential impaired loans. Such system takes into consideration, among other things, delinquency status, size of loans, type and market value of collateral and financial condition of the borrowers. Specific loan loss allowances are established for identified losses based on a review of such information. A loan evaluated for impairment is considered to be impaired when, based on current information and events, it is probable that we will be unable to collect all amounts due according to the contractual terms of the loan agreement. All loans identified as impaired are evaluated independently. The Company does not aggregate such loans for evaluation purposes. Impairment is measured on a loan-by-loan basis for commercial and construction loans by the present value of expected future cash flows discounted at the loan’s effective interest rate, the loan’s obtainable market price, or the fair value of the collateral if the loan is collateral-dependent. Large groups of smaller balance homogeneous loans are collectively evaluated for impairment. Accordingly, the Company does not separately identify individual consumer and residential mortgage loans for impairment disclosures, unless such loans are part of a larger relationship that is impaired or are classified as a troubled debt restructuring (“TDR”). A loan is considered to be a TDR loan when the Company grants a concession to the borrower that it would not otherwise consider because of the borrower’s financial condition. Such concessions include the reduction of interest rates, forgiveness of principal or interest, or other modifications of interest rates that are less than the current market rate for new obligations with similar risk. TDR loans that are in compliance with their modified terms and that yield a market rate at the time of modification may be removed from TDR status after one year of performance. The following tables include the recorded investment and unpaid principal balances for impaired loans with the associated allowance amount at the dates indicated, if applicable (in thousands): Recorded Unpaid Associated March 31, 2023 With no specific allowance recorded: Real estate loans Residential $ 1,116 $ 1,722 $ - Construction - - - Commercial 7,270 7,994 - Commercial 369 409 - Obligations of states and political subdivisions - - - Home equity loans and lines of credit 32 66 - Auto loans 2 5 - Other 4 18 - Total 8,793 10,214 - With an allowance recorded: Real estate loans Residential 101 105 10 Construction - - - Commercial 803 935 5 Commercial 550 565 236 Obligations of states and political subdivisions - - - Home equity loans and lines of credit - - - Auto loans - - - Other - - - Total 1,454 1,605 251 Total: Real estate loans Residential 1,217 1,827 10 Construction - - - Commercial 8,073 8,929 5 Commercial 919 974 236 Obligations of states and political subdivisions - - - Home equity loans and lines of credit 32 66 - Auto loans 2 5 - Other 4 18 - Total Impaired Loans $ 10,247 $ 11,819 $ 251 Recorded Unpaid Associated September 30, 2022 With no specific allowance recorded: Real Estate Loans Residential $ 1,239 $ 2,029 $ - Construction - - - Commercial 8,384 8,987 - Commercial 865 905 - Obligations of states and political subdivisions - - - Home equity loans and lines of credit 36 68 - Auto Loans 16 28 - Other 6 19 - Total 10,546 12,036 - With an allowance recorded: Real Estate Loans Residential 103 108 12 Construction - - - Commercial 3,781 3,928 301 Commercial 72 83 38 Obligations of states and political subdivisions - - - Home equity loans and lines of credit - - - Auto Loans - - - Other - - - Total 3,956 4,119 351 Total: Real Estate Loans Residential 1,342 2,137 12 Construction - - - Commercial 12,165 12,915 301 Commercial 937 988 38 Obligations of states and political subdivisions - - - Home equity loans and lines of credit 36 68 - Auto Loans 16 28 - Other 6 19 - Total Impaired Loans $ 14,502 $ 16,155 $ 351 The following tables represents the average recorded investments in the impaired loans and the related amount of interest recognized during the time within the period that the impaired loans were impaired (in thousands): For the Three Months Ended March 31, 2023 2022 2023 2022 Average Average Interest Interest With no specific allowance recorded: Real estate loans Residential $ 1,156 $ 1,103 $ 1 $ - Construction - - - - Commercial 7,310 6,444 1 3 Commercial 369 77 - - Obligations of states and political subdivisions - - - - Home equity loans and lines of credit 33 292 - - Auto loans 4 28 - - Other 5 - - - Total 8,877 7,944 2 3 With an allowance recorded: Real estate loans Residential 102 107 - - Construction - - - - Commercial 3,393 28 - - Commercial 552 791 - - Obligations of states and political subdivisions - - - - Home equity loans and lines of credit - - - - Auto loans - - - - Other - - - - Total 4,047 926 - - Total: Real estate loans Residential 1,258 1,210 1 - Construction - - - - Commercial 10,703 6,472 1 3 Commercial 921 868 - Obligations of states and political subdivisions - - - - Home equity loans and lines of credit 33 292 - - Auto loans 4 28 - - Other 5 - - - Total Impaired Loans $ 12,924 $ 8,870 $ 2 $ 3 For the Six Months Ended March 31, 2023 2022 2023 2022 Average Average Interest Interest With no specific allowance recorded: Real estate loans Residential $ 1,186 $ 1,698 $ 2 $ 2 Construction - - - - Commercial 8,937 8,746 1 3 Commercial 534 93 - - Obligations of states and political subdivisions - - - - Home equity loans and lines of credit 34 301 - - Auto loans 5 25 - - Other 5 - - - Total 10,701 10,863 3 5 With an allowance recorded: Real estate loans Residential 102 112 - - Construction - - - - Commercial 2,481 21 - - Commercial 392 982 - - Obligations of states and political subdivisions - - - - Home equity loans and lines of credit - - - - Auto loans - 5 - - Other - - - - Total 2,975 1,120 - — Total: Real estate loans Residential 1,288 1,810 2 2 Construction - - - - Commercial 11,418 8,767 1 3 Commercial 926 1,075 - - Obligations of states and political subdivisions - - - - Home equity loans and lines of credit 34 301 - - Auto loans 5 30 - - Other 5 - - - Total Impaired Loans $ 13,676 $ 11,983 $ 3 $ 5 The Company uses a ten-point internal risk-rating system to monitor the credit quality of the overall loan portfolio. The first six categories are considered not criticized and are aggregated as Pass-rated. The criticized rating categories utilized by management generally follow bank regulatory definitions. The Special Mention category includes assets that are fundamentally sound yet exhibit potentially unacceptable credit risk or deteriorating trends or characteristics which, if left uncorrected, may result in deterioration of the repayment prospects for the asset or in the Company’s credit position at some future date. Loans in the Substandard category have well-defined weaknesses that jeopardize the liquidation of the debt and have a distinct possibility that some loss will be sustained if the weaknesses are not corrected. All loans that are 90 or more days past due are considered Substandard. Loans in the Doubtful category have all the weaknesses inherent in loans classified as Substandard with the added characteristic that their weaknesses make collection or liquidation in full, on the basis of currently existing facts, conditions, and values, highly questionable and improbable. Loans in the Loss category are considered uncollectible and of little value that their continuance as bankable assets is not warranted. Certain residential real estate loans, construction loans, home equity loans and lines of credit, auto loans and other consumer loans are underwritten and structured using standardized criteria and characteristics, primarily payment performance, and are normally risk rated and monitored collectively on a monthly basis. These are typically loans to individuals in the consumer categories and are delineated as either performing or non-performing. To help ensure that risk ratings are accurate and reflect the present and future capacity of borrowers to repay a loan as agreed, the Bank has a structured loan rating process with several layers of internal and external oversight. Generally, consumer and residential mortgage loans are included in the Pass categories unless a specific action, such as bankruptcy, repossession, or death occurs to raise awareness of a possible credit event. The Bank’s commercial loan officers are responsible for the timely and accurate risk rating recommendation for the loans in their portfolios at origination and on an ongoing basis. The Bank’s commercial loan officers perform an annual review of all commercial relationships $ 750,000 or greater. Confirmation of the appropriate risk grade is included in the review on an ongoing basis. The Bank engages an external consultant to conduct loan reviews on at least a semi-annual basis. Generally, the external consultant reviews commercial relationships greater than $ 1,000,000 and/or all criticized relationships. Detailed reviews, including plans for resolution, are performed on loans classified as Substandard on a quarterly basis. Loans in the Special Mention and Substandard categories that are collectively evaluated for impairment are given separate consideration in the determination of the allowance. The following tables present the classes of the loan portfolio summarized by the aggregate Pass and the criticized categories of Special Mention, Substandard, and Doubtful or Loss within the internal risk rating system at March 31, 2023 and September 30, 2022 (in thousands): Pass Special Substandard Doubtful Total March 31, 2023 Commercial real estate loans $ 734,312 $ 3,270 $ 10,797 $ - $ 748,379 Commercial 42,127 1,539 1,157 - 44,823 Obligations of states and political subdivisions 48,044 - - - 48,044 Total $ 824,483 $ 4,809 $ 11,954 $ - $ 841,246 Pass Special Substandard Doubtful Total September 30, 2022 Commercial real estate loans $ 659,104 $ 6,060 $ 13,677 $ - $ 678,841 Commercial 35,322 1,690 1,146 - 38,158 Obligations of states and political subdivisions 40,416 - - - 40,416 Total $ 734,842 $ 7,750 $ 14,823 $ - $ 757,415 All other loans are underwritten and structured using standardized criteria and characteristics, primarily payment performance, and are normally risk rated and monitored collectively on a monthly basis. These are typically loans to individuals in the consumer categories and are delineated as either performing or non-performing. The following tables present the risk ratings in the consumer categories of performing and non-performing loans at March 31, 2023 and September 30, 2022 (in thousands): Performing Non- Total March 31, 2023 Real estate loans: Residential $ 669,098 $ 2,259 $ 671,357 Construction 27,572 - 27,572 Home equity loans and lines of credit 43,518 105 43,623 Auto loans 1,495 4 1,499 Other 2,321 35 2,356 Total $ 744,004 $ 2,403 $ 746,407 Performing Non- Total September 30, 2022 Real estate loans: Residential $ 621,781 $ 1,594 $ 623,375 Construction 25,024 - 25,024 Home equity loans and lines of credit 42,832 338 43,170 Auto loans 3,590 21 3,611 Other 1,710 6 1,716 Total $ 694,937 $ 1,959 $ 696,896 The Company further monitors the performance and credit quality of the loan portfolio by analyzing the age of the portfolio as determined by the length of time a recorded payment is past due. The following tables present the classes of the loan portfolio summarized by the aging categories of performing loans and nonaccrual loans as of March 31, 2023 and September 30, 2022 (in thousands): 31-60 Days 61-89 Days 90 + Days Total Total Current Past Due Past Due Past Due Past Due Loans March 31, 2023 Real estate loans: Residential $ 668,133 $ 901 $ 398 $ 1,925 $ 3,224 $ 671,357 Construction 27,572 - - - - 27,572 Commercial 739,418 2,405 69 6,487 8,961 748,379 Commercial 43,940 17 - 866 883 44,823 Obligations of states and political subdivisions 48,044 - - - - 48,044 Home equity loans and lines of credit 43,469 49 32 73 154 43,623 Auto loans 1,441 57 - 1 58 1,499 Other 2,322 4 - 30 34 2,356 Total $ 1,574,339 $ 3,433 $ 499 $ 9,382 $ 13,314 $ 1,587,653 31-60 Days 61-89 Days 90 + Days Total Total Current Past Due Past Due Past Due Past Due Loans September 30, 2022 Real estate loans: Residential $ 621,270 $ 598 $ 367 $ 1,140 $ 2,105 $ 623,375 Construction 25,024 - - - - 25,024 Commercial 672,875 5,719 - 247 5,966 678,841 Commercial 37,160 539 440 19 998 38,158 Obligations of states and political subdivisions 40,416 - - - - 40,416 Home equity loans and lines of credit 42,842 121 144 63 328 43,170 Auto loans 3,462 134 2 13 149 3,611 Other 1,685 - 31 - 31 1,716 Total $ 1,444,734 $ 7,111 $ 984 $ 1,482 $ 9,577 $ 1,454,311 Non-Accrual Loans March 31, 2023 September 30, 2022 Real estate loans: Residential $ 2,259 $ 1,594 Construction - - Commercial 8,073 12,165 Commercial 919 958 Obligations of states and - - Home equity loans and lines of 105 338 Auto loans 4 21 Other 35 6 Total $ 11,395 $ 15,082 There are no loans greater than 90 days past due that are accruing interest. The allowance for loan losses is maintained at a level necessary to absorb loan losses that are both probable and reasonably estimable. Management, in determining the allowance for loan losses, considers the losses inherent in its loan portfolio and changes in the nature and volume of loan activities, along with the general economic and real estate market conditions. The allowance for loan losses consists of two elements: (1) an allocated allowance, which comprises allowances established on specific loans and class allowances based on historical loss experience and current trends, and (2) an unallocated allowance based on general economic conditions and other risk factors in our markets and portfolios. We maintain a loan review system, which allows for a periodic review of our loan portfolio and the early identification of potential impaired loans. Such system takes into consideration, among other things, delinquency status, size of loans, type and market value of collateral and financial condition of the borrowers. General loan loss allowances are based upon a combination of factors including, but not limited to, actual loan loss experience, composition of the loan portfolio, current economic conditions, management’s judgment and losses which are probable and reasonably estimable. The allowance is increased through provisions charged against current earnings and recoveries of previously charged-off loans. Loans that are determined to be uncollectible are charged against the allowance. While management uses available information to recognize probable and reasonably estimable loan losses, future loss provisions may be necessary, based on changing economic conditions. Payments received on impaired loans generally are either applied against principal or reported as interest income, according to management’s judgment as to the collectability of principal. The allowance for loan losses as of March 31, 2023 was maintained at a level that represents management’s best estimate of losses inherent in the loan portfolio, and such losses were both probable and reasonably estimable. In addition, the FDIC and the Pennsylvania Department of Banking and Securities, as an integral part of their examination process, have periodically reviewed our allowance for loan losses. The banking regulators may require that we recognize additions to the allowance based on its analysis and review of information available to it at the time of its examination. Management reviews the loan portfolio on a quarterly basis using a defined, consistently applied process in order to make appropriate and timely adjustments to the allowance for loan losses (“ALL”). When information confirms all or part of specific loans to be uncollectible, these amounts are promptly charged off against the ALL. The following table summarizes changes in the primary segments of the ALL during the three months ended March 31, 2023 and 2022 (in thousands): Home Obligations of Equity States and Loans and Real Estate Loans Commercial Political Lines of Auto Other Residential Construction Commercial Loans Subdivisions Credit Loans Loans Unallocated Total ALL balance at December 31, 2022 $ 5,286 $ 328 $ 11,194 $ 1,048 $ 275 $ 372 $ 14 $ 22 $ 202 $ 18,741 Charge-offs - - ( 593 ) - - - ( 6 ) - - ( 599 ) Recoveries - - - - - 1 22 - - 23 Provision ( 416 ) - 415 137 ( 32 ) ( 37 ) ( 22 ) - 105 150 ALL balance at March 31, 2023 $ 4,870 $ 328 $ 11,016 $ 1,185 $ 243 $ 336 $ 8 $ 22 $ 307 $ 18,315 ALL balance at December 31, 2021 $ 4,098 $ 241 $ 10,607 $ 1,224 $ 265 $ 297 $ 196 $ 21 $ 1,261 $ 18,210 Charge-offs ( 5 ) - ( 19 ) - - - ( 15 ) - - ( 39 ) Recoveries - - 6 - - 2 29 - - 37 Provision 310 4 ( 44 ) ( 401 ) ( 19 ) 11 ( 121 ) ( 1 ) 261 - ALL balance at March 31, 2022 $ 4,403 $ 245 $ 10,550 $ 823 $ 246 $ 310 $ 89 $ 20 $ 1,522 $ 18,208 ALL balance at September 30, 2022 $ 5,122 $ 319 $ 10,754 $ 698 $ 283 $ 361 $ 22 $ 22 $ 947 $ 18,528 Charge-offs - - ( 593 ) - - - ( 27 ) - - ( 620 ) Recoveries 2 - 1 - - 52 52 - - 107 Provision ( 254 ) 9 854 487 ( 40 ) ( 77 ) ( 39 ) - ( 640 ) 300 ALL balance at March 31, 2023 $ 4,870 $ 328 $ 11,016 $ 1,185 $ 243 $ 336 $ 8 $ 22 $ 307 $ 18,315 ALL balance at September 30, 2021 $ 4,114 $ 187 $ 10,470 $ 1,041 $ 393 $ 318 $ 232 $ 21 $ 1,337 $ 18,113 Charge-offs ( 10 ) - ( 19 ) - - - ( 22 ) - - ( 51 ) Recoveries 72 - 7 - - 3 64 - - 146 Provision 227 58 92 ( 218 ) ( 147 ) ( 11 ) ( 185 ) ( 1 ) 185 - ALL balance at March 31, 2022 $ 4,403 $ 245 $ 10,550 $ 823 $ 246 $ 310 $ 89 $ 20 $ 1,522 $ 18,208 During the three months ended March 31, 2023, the Company recorded provision expense for the commercial real estate loans and commercial loans segments due to either increased loan balances, changes in the loan mix within the pool, and/or charge-off activity in those segments. Credit provisions were recorded for loan loss for the residential real estate loans, obligations of states and political subdivisions, home equity loans and lines of credit and auto loans due to either decreased loan balances, improved asset quality, changes in the loan mix within the pool, and/or decreased charge-off activity in those segments. During the three months ended March 31, 2022, the Company recorded provision expense for the residential real estate loans, construction real estate loans and home equity loans and lines of credit due to either increased loan balances, changes in the loan mix within the pool, and/or charge-off activity in those segments. Credit provisions were recorded for loan loss for the commercial real estate loans, commercial loans, obligations of states and political subdivisions, auto loans and other loan segments due to either decreased loan balances, improved asset quality, changes in the loan mix within the pool, and/or decreased charge-off activity in those segments. During the six months ended March 31, 2023, the Company recorded provision expense for the construction real estate loans, commercial real estate loans and commercial loans segments, due to either increased loan balances, changes in the loan mix within the pool, and/or charge-off activity in those segments. Credit provisions were recorded for loan loss for the residential real estate loans, obligations of states and political subdivisions, home equity loans and lines of credit and auto loans segments due to either decreased loan balances, changes in the loan mix within the pool, and/or decreased charge-off activity in those segments. During the six months ended March 31, 2022, the Company recorded provision expense for the residential real estate loans, construction real estate loans and the commercial real estate loans segments, due to either increased loan balances, changes in the loan mix within the pool, and/or charge-off activity in those segments. Credit provisions were recorded for loan loss for the commercial loans, obligations of states and political subdivisions, home equity loans and lines of credit and auto loans segments due to either decreased loan balances, improved asset quality, changes in the loan mix within the pool, and/or decreased charge-off activity in those segments. The following table summarizes the primary segments of the ALL, segregated into two categories, the amount required for loans individually evaluated for impairment and the amount required for loans collectively evaluated for impairment as of March 31, 2023 and September 30, 2022 (in thousands): Home Obligations of Equity States and Loans and Real Estate Loans Commercial Political Lines of Other Residential Construction Commercial Loans Subdivisions Credit Auto Loans Loans Unallocated Total Individually $ 10 $ - $ 5 $ 236 $ - $ - $ - $ - $ - $ 251 Collectively 4,860 328 11,011 949 243 336 8 22 307 18,064 ALL balance at March 31, 2023 $ 4,870 $ 328 $ 11,016 $ 1,185 $ 243 $ 336 $ 8 $ 22 $ 307 $ 18,315 Individually $ 12 $ - $ 301 $ 38 $ - $ - $ - $ - $ - $ 351 Collectively 5,110 319 10,453 660 283 361 22 22 947 18,177 ALL balance at September 30, 2022 $ 5,122 $ 319 $ 10,754 $ 698 $ 283 $ 361 $ 22 $ 22 $ 947 $ 18,528 The allowance for loan losses is based on estimates, and actual losses will vary from current estimates. Management believes that the granularity of the homogeneous pools and the related historical loss ratios and other qualitative factors, as well as the consistency in the application of assumptions, result in an ALL that is representative of the risk found in the components of the portfolio at any given date. Despite the above allocations, the allowance for loan losses is general in nature and is available to absorb losses from any loan segment. There were no new troubled debt restructurings granted during the three months ended March 31, 2023. The following is a summary of troubled debt restructuring granted during the three months ended March 31, 2022 and six months ended March 31, 2023 and 2022 (dollars in thousands): For the Three Months Ended March 31, 2022 Number of Pre-Modification Post-Modification Troubled Debt Restructurings Real estate loans: Residential 2 $ 88 $ 88 Construction — — — Commercial — — — Commercial — — — Obligations of states and political subdivisions — — — Home equity loans and lines of credit — — — Auto loans — — — Other — — — Total 2 $ 88 $ 88 For the Six Months Ended March 31, 2023 Number of Pre-Modification Post-Modification Troubled Debt Restructurings Real estate loans: Residential 1 $ 51 $ 54 Construction — — — Commercial — — — Commercial — — — Obligations of states and political subdivisions — — — Home equity loans and lines of credit — — — Auto loans — — — Other — — — Total 1 $ 51 $ 54 For the Six Months Ended March 31, 2022 Number of Pre-Modification Post-Modification Troubled Debt Restructurings Real estate loans: Residential 2 $ 88 $ 88 Construction — — — Commercial — — — Commercial — — — Obligations of states and political subdivisions — — — Home equity loans and lines of credit — — — Auto loans — — — Other — — — Total 2 $ 88 $ 88 For the three and six months ended March 31, 2023 and 2022, no loans defaulted on a restructuring agreement within one year of modification.

Deposits

Deposits	6 Months Ended
	Mar. 31, 2023
Deposits Liabilities Disclosures [Abstract]
Deposits	7. Deposits Deposits consist of the following major classifications (in thousands): March 31, 2023 September 30, 2022 Non-interest bearing demand accounts $ 274,274 $ 290,061 Interest bearing demand accounts 295,212 357,516 Money market accounts 354,371 402,080 Savings and club accounts 176,402 196,696 Certificates of deposit 329,038 133,668 Total $ 1,429,297 $ 1,380,021

Net Periodic Benefit Cost-Defin

Net Periodic Benefit Cost-Defined Benefit Plan	6 Months Ended
	Mar. 31, 2023
Compensation And Retirement Disclosure [Abstract]
Net Periodic Benefit Cost-Defined Benefit Plan	8. Net Periodic Benefit Cost-Defined Benefit Plan For a detailed disclosure on the Bank’s pension and employee benefits plans, please refer to Note 12 of the Company’s Consolidated Financial Statements for the year ended September 30, 2022 included in the Company’s Annual Report on Form 10-K. The following table comprises the components of net periodic benefit cost (income) for the three and six month periods ended March 31, 2023 and 2022 (in thousands): For the Three Months Ended March 31, For the Six Months Ended March 31, 2023 2022 2023 2022 Service Cost $ - $ - $ - $ - Interest Cost 164 131 328 256 Expected return on plan assets ( 242 ) ( 339 ) ( 484 ) ( 672 ) Partial settlement - 83 — 221 Amortization of net loss from earlier periods - 1 — 2 Net periodic benefit income $ ( 78 ) $ ( 124 ) $ ( 156 ) $ ( 193 ) The Company’s board of directors adopted resolutions to freeze the status of the Defined Benefit Plan (“the plan”) effective February 28, 2017 (“the freeze date”). Accordingly, no additional participants have been allowed to enter the plan since February 28, 2017; no additional years of service for benefit accrual purposes have been credited since the freeze date under the plan; and compensation earned by participants after the freeze date is not taken into account under the plan.

Equity Incentive Plan

Equity Incentive Plan	6 Months Ended
	Mar. 31, 2023
Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]
Equity Incentive Plan	9. Equity Incentive Plan The Company previously maintained the ESSA Bancorp, Inc. 2007 Equity Incentive Plan (the “Plan”). The Plan provided for a total of 2,377,326 shares of common stock for issuance upon the grant or exercise of awards. Of the shares that were available under the Plan, 1,698,090 were available to be issued in connection with the exercise of stock options and 679,236 were available to be issued as restricted stock. The Plan allowed for the granting of non-qualified stock options (“NSOs”), incentive stock options (“ISOs”), and restricted stock. Options granted under the plan were granted at no less than the fair value of the Company’s common stock on the date of the grant. As of the effective date of the 2016 Equity Incentive Plan (detailed below), no further grants will be made under the Plan and forfeitures of outstanding awards under the Plan will be added to the shares available under the 2016 Equity Incentive Plan. The Company replaced the 2007 Equity Incentive Plan with the ESSA Bancorp, Inc. 2016 Equity Incentive Plan (the “2016 Plan”) which was approved by shareholders on March 3, 2016. The 2016 Plan provides for a total of 250,000 shares of common stock for issuance upon the grant or exercise of awards. The 2016 Plan allows for the granting of restricted stock, restricted stock units, ISOs and NSOs. The Company classifies share-based compensation for employees and outside directors within “Compensation and employee benefits” in the Consolidated Statement of Operations to correspond with the same line item as compensation paid. Restricted stock shares outstanding at March 31, 2023 vest over periods ranging from 1 to 42 months . The product of the number of shares granted and the grant date market price of the Company’s common stock determines the fair value of restricted shares under the Company’s restricted stock plan. The Company expenses the fair value of all share based compensation grants over the requisite service period. For the three months ended March 31, 2023 and 2022, the Company recorded $ 91,000 and $ 93,000 of share-based compensation expense, respectively, comprised of restricted stock expense. For the six months ended March 31, 2023 and 2022, the Company recorded $ 386,000 and $ 355,000 of share-based compensation expense, respectively, comprised of restricted stock expense. Expected future compensation expense relating to the restricted shares outstanding at March 31, 2023 is $ 737,000 over the remaining vesting period of 3.75 years. The following is a summary of the status of the Company’s restricted stock as of March 31, 2023, and changes therein during the six month period then ended: Number of Stock Weighted- Nonvested at September 30, 2022 35,639 $ 14.88 Granted 31,696 19.06 Vested ( 11,441 ) 18.33 Forfeited — — Nonvested at March 31, 2023 55,894 $ 17.06

Fair Value

Fair Value	6 Months Ended
	Mar. 31, 2023
Fair Value Disclosures [Abstract]
Fair Value	10. Fair Value The following disclosures show the hierarchal disclosure framework associated within the level of pricing observations utilized in measuring assets and liabilities at fair value. The definition of fair value maintains the exchange price notion in earlier definitions of fair value but focuses on the exit price of the asset or liability. The exit price is the price that would be received to sell the asset or paid to transfer the liability adjusted for certain inherent risks and restrictions. Expanded disclosures are also required about the use of fair value to measure assets and liabilities. Assets and Liabilities Required to be Measured and Reported at Fair Value on a Recurring Basis The following tables provide the fair value for assets and liabilities required to be measured and reported at fair value on a recurring basis on the Consolidated Balance Sheet as of March 31, 2023 and September 30, 2022 by level within the fair value hierarchy (in thousands). Recurring Fair Value Measurements at Reporting Date March 31, 2023 Assets Level I Level II Level III Total Investment securities available for sale: Mortgage backed securities $ - $ 106,381 $ - $ 106,381 Obligations of states and political subdivisions - 10,168 - 10,168 U.S. government agency securities - 9,373 - 9,373 Corporate obligations - 66,629 3,429 70,058 Other debt securities - 7,310 - 7,310 Total debt securities $ - $ 199,861 $ 3,429 $ 203,290 Equity securities- financial services 32 - - 32 Derivatives and hedging activities - 18,284 - 18,284 Liabilities Derivatives and hedging activities $ - $ 6,913 $ - $ 6,913 September 30, 2022 Assets Level I Level II Level III Total Investment securities available for sale: Mortgage backed securities $ - $ 110,160 $ - $ 110,160 Obligations of states and political subdivisions - 9,920 - 9,920 U.S. government agency securities - 9,330 - 9,330 Corporate obligations - 63,745 7,374 71,119 Other debt securities - 8,118 - 8,118 Total debt securities $ - $ 201,273 $ 7,374 $ 208,647 Equity securities-financial services 36 - - 36 Derivatives and hedging activities - 24,481 - 24,481 Liabilities: Derivatives and hedging activities $ - $ 9,176 $ - $ 9,176 The following table presents a summary of changes in the fair value of the Company’s Level III investments for the three and six month periods ended March 31, 2023 and 2022 (in thousands). Fair Value Measurement Using Three Months Ended March 31, 2023 March 31, 2022 Beginning balance $ 7,199 $ 10,937 Purchases, sales, issuances, settlements, net - ( 500 ) Total unrealized (loss) gain: Included in earnings - - Included in other comprehensive (loss) income ( 253 ) ( 175 ) Transfers in and/or out of Level III ( 3,517 ) 500 $ 3,429 $ 10,762 Fair Value Measurement Using Six Months Ended March 31, 2023 March 31, 2022 Beginning balance $ 7,374 $ 11,112 Purchases, sales, issuances, settlements, net - ( 500 ) Total unrealized gain (loss): Included in earnings - - Included in other comprehensive (loss) income ( 428 ) ( 350 ) Transfers in and/or out of Level III ( 3,517 ) 500 $ 3,429 $ 10,762 Each financial asset and liability is identified as having been valued according to a specified level of input, 1, 2 or 3. Level 1 inputs are quoted prices (unadjusted) in active markets for identical assets or liabilities that the Company has the ability to access at the measurement date. Fair values determined by Level 2 inputs utilize inputs other than quoted prices included in Level 1 that are observable for the asset, either directly or indirectly. Level 2 inputs include quoted prices for similar assets in active markets, and inputs other than quoted prices that are observable for the asset or liability. Level 3 inputs are unobservable inputs for the asset, and include situations where there is little, if any, market activity for the asset or liability. In certain cases, the inputs used to measure fair value may fall into different levels of the fair value hierarchy. In such cases, the level in the fair value hierarchy, within which the fair value measurement in its entirety falls, has been determined based on the lowest level input that is significant to the fair value measurement in its entirety. The Company’s assessment of the significance of a particular input to the fair value measurement in its entirety requires judgment and considers factors specific to the asset. The measurement of fair value should be consistent with one of the following valuation techniques: market approach, income approach, and/or cost approach. The market approach uses prices and other relevant information generated by market transactions involving identical or comparable assets or liabilities (including a business). For example, valuation techniques consistent with the market approach often use market multiples derived from a set of comparable. Multiples might lie in ranges with a different multiple for each comparable. The selection of where within the range the appropriate multiple falls requires judgment, considering factors specific to the measurement (qualitative and quantitative). Valuation techniques consistent with the market approach include matrix pricing. Matrix pricing is a mathematical technique used principally to value debt securities without relying exclusively on quoted prices for the specific securities, but rather by relying on a security’s relationship to other benchmark quoted securities. Most of the securities classified as available for sale are reported at fair value utilizing Level 2 inputs. For these securities, the Company obtains fair value measurements from an independent pricing service. The fair value measurements consider observable data that may include dealer quoted market spreads, cash flows, the U.S. Treasury yield curve, live trading levels, trade execution data, market consensus prepayment speeds, credit information and the bond’s terms and conditions, among other things. Securities reported at fair value utilizing Level 1 inputs are limited to actively traded equity securities whose market price is readily available from the New York Stock Exchange or the NASDAQ exchange. A few securities are valued using Level 3 inputs, all of these are classified as available for sale and are reported at fair value using Level 3 inputs. Assets and Liabilities Required to be Measured and Reported on a Non-Recurring Basis The following tables provide the fair value for assets required to be measured and reported at fair value on a non-recurring basis on the Consolidated Balance Sheet as of March 31, 2023 and September 30, 2022 by level within the fair value hierarchy: Non-Recurring Fair Value Measurements at Reporting Date (in thousands) March 31, 2023 Level I Level II Level III Total Foreclosed real estate $ - $ - $ 3,546 $ 3,546 Impaired loans - - 9,996 9,996 September 30, 2022 Level I Level II Level III Total Foreclosed real estate $ - $ - $ 29 $ 29 Impaired loans - - 14,151 14,151 The following tables present additional quantitative information about assets measured at fair value on a nonrecurring basis and for which the Company has utilized Level 3 inputs to determine fair value: Quantitative Information about Level 3 Fair Value Measurements (dollars in thousands) Fair Value Valuation Unobservable Range (Average) March 31, 2023 Impaired loans $ 9,996 Appraisal of Appraisal 0 % to 35 % 20.8 %) Foreclosed real estate owned 3,546 Appraisal of Appraisal 20 % to 35 % 20.1 %) Quantitative Information about Level 3 Fair Value Measurements (dollars in thousands) Fair Value Valuation Unobservable Range (Average) September 30, 2022 Impaired loans $ 14,151 Appraisal of Appraisal 0 % to 35 % 20.6 %) Foreclosed real estate owned 29 Appraisal of Appraisal 20 % 20.0 %) (1) Fair value is generally determined through independent appraisals of the underlying collateral, which generally include various level 3 inputs which are not identifiable. (2) Appraisals may be adjusted by management for qualitative factors such as economic conditions and estimated liquidation expenses. The range of liquidation expenses and other appraisal adjustments are presented as a percent of the appraisal. Foreclosed real estate is measured at fair value, less cost to sell at the date of foreclosure, valuations are periodically performed by management and the assets are carried at the lower of carrying amount or fair value, less cost to sell. Income and expenses from operations and changes in valuation allowance are included in the net expenses from foreclosed real estate. Impaired loans are reported at fair value utilizing level three inputs. For these loans, a review of the collateral is conducted and an appropriate allowance for loan losses is allocated to the loan. At March 31, 2023, 3 8 impaired loans with a carrying value of $ 10.2 million were reduced by specific valuation allowance totaling $ 251,000 resulting in a net fair value of $ 10.0 million based on Level 3 inputs. At September 30, 2022, 49 impaired loans with a carrying value of $ 14.5 million were reduced by a specific valuation totaling $ 351,000 resulting in a net fair value of $ 14.2 million based on Level 3 inputs. Assets and Liabilities not Required to be Measured and Reported at Fair Value The following tables provide the carrying value and fair value for certain financial instruments that are not required to be measured or reported at fair value on the Consolidated Balance Sheet at March 31, 2023 and September 30, 2022 by level within the fair value hierarchy: March 31, 2023 (in thousands) Carrying Value Level I Level II Level III Total Fair Financial assets: Investment securities held to maturity $ 54,904 $ - $ 46,835 $ - $ 46,835 Loans receivable, net 1,569,338 - - 1,464,066 1,464,066 Mortgage servicing rights 798 - - 1,306 1,306 Financial liabilities: Deposits $ 1,429,297 $ 1,100,259 $ - $ 247,262 $ 1,347,521 Short term borrowings 301,478 — — 289,842 289,842 September 30, 2022 (in thousands) Carrying Value Level I Level II Level III Total Fair Financial assets: Investment securities held to maturity $ 57,285 $ - $ 47,546 $ - $ 47,546 Loans receivable, net 1,435,783 - - 1,351,823 1,351,823 Mortgage servicing rights 788 - - 1,390 1,390 Financial liabilities: Deposits $ 1,380,021 $ 1,246,353 $ - $ 128,533 $ 1,374,886 Short-term borrowings 230,810 - - 215,287 215,287

Accumulated Other Comprehensive

Accumulated Other Comprehensive Income (Loss)	6 Months Ended
	Mar. 31, 2023
Equity [Abstract]
Accumulated Other Comprehensive Income (Loss)	11. Accumulated Other Comprehensive Income (Loss) The activity in accumulated other comprehensive income (loss) for the three and six month periods ended March 31, 2023 and 2022 is as follows (in thousands): Accumulated Other Defined Unrealized Gains Derivatives Total Balance at December 31, 2022 $ ( 1,108 ) $ ( 13,041 ) $ 11,172 $ ( 2,977 ) Other comprehensive (loss) income before - 1,277 ( 374 ) 903 Amounts reclassified from accumulated - - ( 1,810 ) ( 1,810 ) Period change — 1,277 ( 2,184 ) ( 907 ) Balance at March 31, 2023 $ ( 1,108 ) $ ( 11,764 ) $ 8,988 $ ( 3,884 ) Balance at December 31, 2021 $ ( 1,034 ) $ 1,119 $ 2,504 $ 2,589 Other comprehensive (loss) income before ( 54 ) ( 4,153 ) 5,392 1,185 Amounts reclassified from accumulated 66 - 131 197 Period change 12 ( 4,153 ) 5,523 1,382 Balance at March 31, 2022 $ ( 1,022 ) $ ( 3,034 ) $ 8,027 $ 3,971 Accumulated Other Defined Unrealized Gains Derivatives Total Balance at September 30, 2022 $ ( 1,108 ) $ ( 13,879 ) $ 12,093 $ ( 2,894 ) Other comprehensive income (loss) before — 2,115 153 2,268 Amounts reclassified from accumulated other — — ( 3,258 ) ( 3,258 ) Period change — 2,115 ( 3,105 ) ( 990 ) Balance at March 31, 2023 $ ( 1,108 ) $ ( 11,764 ) $ 8,988 $ ( 3,884 ) Balance at September 30, 2021 $ ( 1,907 ) $ 1,962 $ 627 $ 682 Other comprehensive income (loss) before reclassifications 710 ( 4,996 ) 7,082 2,796 Amounts reclassified from accumulated other 175 — 318 493 Period change 885 ( 4,996 ) 7,400 3,289 Balance at March 31, 2022 $ ( 1,022 ) $ ( 3,034 ) $ 8,027 $ 3,971 The following table presents significant amounts reclassified out of each component of accumulated other comprehensive income (loss) for the three and six month periods ended March 31, 2023 and 2022 (in thousands): Amount Reclassified from Details About Accumulated Other Comprehensive Income (Loss) Components Accumulated Other Comprehensive Income (Loss) for the Three Months Ended March 31, Affected Line Item in the 2023 2022 Securities available for sale: Defined benefit pension plan Amortization of net gain and prior service costs $ - $ ( 84 ) Compensation and employee benefits Related income tax expense - 18 Income taxes Net effect on accumulated other comprehensive income (loss) - ( 66 ) Derivatives and hedging activities: Interest expense, effective portion 2,293 ( 166 ) Interest expense Related income tax expense ( 483 ) 35 Income taxes Net effect on accumulated other comprehensive income (loss) 1,810 ( 131 ) Total reclassification for the period $ 1,810 $ ( 197 ) Amount Reclassified from Accumulated Other Comprehensive Income (Loss) For the Six Months Ended March 31, Affected Line Item in the 2023 2022 Defined benefit pension plan Amortization of net (loss) gain and prior service costs - ( 223 ) Related income tax expense - 48 Income taxes Net effect on accumulated other comprehensive income (loss) - ( 175 ) Derivative and hedging activities: Interest expense, effective portion 4,127 ( 402 ) Interest expense Related income tax expense ( 869 ) 84 Income taxes Net effect on accumulated other comprehensive income (loss) 3,258 ( 318 ) Total reclassification for the period $ 3,258 $ ( 493 )

Derivative and Hedging Activiti

Derivative and Hedging Activities	6 Months Ended
	Mar. 31, 2023
Derivative Instruments And Hedging Activities Disclosure [Abstract]
Derivatives and Hedging Activities	12. Derivatives and Hedging Activities Risk Management Objective of Using Derivatives The Company is exposed to certain risks arising from both its business operations and economic conditions. The Company principally manages its exposures to a wide variety of business and operational risks through management of its core business activities. The Company manages economic risks, including interest rate, liquidity, and credit risk, primarily by managing the amount, sources, and duration of its assets and liabilities and through the use of derivative financial instruments. Specifically, the Company enters into derivative financial instruments to manage exposures that arise from business activities that result in the receipt or payment of future known and uncertain cash amounts, the value of which are determined by interest rates. The Company’s derivative financial instruments are used to manage differences in the amount, timing, and duration of the Company’s known or expected cash receipts and its known or expected cash payments principally related to certain variable rate borrowings. Fair Values of Derivative Instruments on the Consolidated Balance Sheet The table below presents the fair value of the Company’s derivative financial instruments as of March 31, 2023 and September 30, 2022 (in thousands). Fair Values of Derivative Instruments Asset Derivatives As of March 31, 2023 As of September 30, 2022 Hedged Item Notional Fair Notional Fair FHLB Advances $ 215,000 $ 11,379 $ 225,000 $ 15,310 Commercial Loans 83,149 6,905 79,602 9,171 Total $ 298,149 $ 18,284 $ 304,602 $ 24,481 Fair Values of Derivative Instruments Liability Derivatives As of March 31, 2023 As of September 30, 2022 Hedged Item Notional Fair Notional Fair Commercial Loans $ 114,808 $ 6,913 $ 111,668 $ 9,176 Total $ 114,808 $ 6,913 $ 111,668 $ 9,176 Cash Flow Hedges of Interest Rate Risk The Company’s objectives in using interest rate derivatives are to add stability to interest income and expense and to manage its exposure to interest rate movements. To accomplish this objective, the Company has entered into interest rate swaps as part of its interest rate risk management strategy. These interest rate swaps are designated as cash flow hedges and involve the receipt of variable rate amounts from a counterparty in exchange for the Company making fixed payments. As of March 31, 2023, the Company had nine interest rate swaps with a notional principal amount of $ 215.0 million associated with the Company’s cash outflows associated with various FHLB advances and $ 198.0 million associated with associated with various commercial loans. For derivatives designated as cash flow hedges, the effective portion of changes in the fair value of the derivative is initially reported in other comprehensive income (outside of earnings), net of tax, and subsequently reclassified to earnings when the hedged transaction affects earnings, and the ineffective portion of changes in the fair value of the derivative is recognized directly in earnings. The Company assesses the effectiveness of each hedging relationship by comparing the changes in cash flows of the derivative hedging instrument with the changes in cash flows of the designated hedged transactions. The Company did not recognize any hedge ineffectiveness in earnings during the three and six month periods ended March 31, 2023 and 2022. Amounts reported in accumulated other comprehensive income (loss) related to derivatives that will be reclassified to interest income/expense as interest payments are made/received on the Company’s variable-rate assets/liabilities. During the three months ended March 31, 2023, the Company had $ 2.3 million of gains, which resulted in a decrease to interest expense. During the three months ended March 31, 2022, the Company had $ 166,000 of losses which resulted in an increase to interest expense. During the six months ended March 31, 2023, the Company had $ 4.1 million of gains, which resulted in a decrease to interest expense. During the six months ended March 31, 2022, the Company had $ 402,000 of losses which resulted in an increase to interest expense. During the next twelve months, the Company estimates that $ 7.8 million will be reclassified as a decrease to interest expense. The table below presents the effect of the Company’s cash flow hedge accounting on Accumulated Other Comprehensive Income (Loss) for the three and six month periods ended March 31, 2023 and 2022 (in thousands). The Effect of Fair Value and Cash Flow Hedge Accounting on Accumulated Other Comprehensive Income (Loss) Derivatives in Hedging Relationships (Gain) Loss Recognized in Location of Gain Gain (Loss) Reclassified Derivatives in Cash Flow Hedging Relationships 2023 2022 2023 2022 Interest Rate Products $ ( 2,768 ) $ 6,992 Interest expense $ 2,293 $ ( 166 ) Total $ ( 2,768 ) $ 6,992 $ 2,293 $ ( 166 ) Derivatives in Cash Flow Gain (Loss) Recognized in Location of Gain Gain (Loss) Recognized 2023 2022 2023 2022 Interest Rate Products $ ( 3,934 ) $ 5,546 Interest expense $ 4,127 $ ( 402 ) Total $ ( 3,934 ) $ 5,546 $ 4,127 $ ( 402 ) Credit-risk-related Contingent Features The Company has agreements with its derivative counterparties that contain a provision where if the Company defaults on any of its indebtedness, including default where repayment of the indebtedness has not been accelerated by the lender, then the Company could also be declared in default on its derivative obligations. The Company also has agreements with certain of its derivative counterparties that contain a provision where if the Company fails to maintain its status as a well / adequately capitalized institution, then the counterparty could terminate the derivative positions and the Company would be required to settle its obligations under the agreements. As of March 31, 2023 and September 30, 2022, the Company had no derivatives in a net liability position and was no t required to post collateral against its obligations under these agreements. If the Company had breached any of these provisions at March 31, 2023 and September 30, 2022, it could have been required to settle its obligations under the agreements at the termination value.

Contingent Liabilities

Contingent Liabilities	6 Months Ended
	Mar. 31, 2023
Commitments And Contingencies Disclosure [Abstract]
Contingent Liabilities	13. Contingent Liabilities Legal Proceedings The Company and its subsidiaries are subject to various legal actions arising in the normal course of business. In the opinion of Management, the resolution of these legal actions is not expected to have a material adverse effect on the Company’s results of operations. The Company and its subsidiary, ESSA Bank and Trust (“ESSA B&T”) were named as defendants, among others, in an action commenced on December 8, 2016 by one plaintiff who sought to pursue the suit as a class action on behalf of the entire class of people similarly situated. The plaintiff alleged that a bank previously acquired by the Company received unearned fees and kickbacks in the process of making loans, in violation of the Real Estate Settlement Procedures Act. In an order dated January 29, 2018, the district court granted the defendants’ motion to dismiss the case. The plaintiff appealed the court’s ruling. In an opinion and order dated April 26, 2019, the appellate court reversed the district court’s order dismissing the plaintiff’s case against the Company and remanded the case to the district court in order to continue the litigation. The litigation is now proceeding before the district court. On December 9, 2019, the court permitted an amendment to the complaint to add two new plaintiffs to the case asserting similar claims. On May 21, 2020, the court granted the plaintiffs’ motion for class certification. Fact and expert discovery is now complete, and the Company and ESSA B&T have filed motions seeking to have the case dismissed (in whole or in part) and/or the class de-certified, as well as for other relief. Plaintiffs have opposed the motions. The Company and ESSA B&T will continue to vigorously defend against plaintiffs’ allegations. To the extent that this matter could result in exposure to the Company and/or ESSA B&T, the amount or range of such exposure is not currently estimable but could be substantial. On May 29, 2020, the Company and ESSA B&T were named as defendants in a second action commenced by three plaintiffs who also seek to pursue this action as a class action on behalf of the entire class of people similarly situated. The plaintiffs allege that a bank previously acquired by the Company received unearned fees and kickbacks from a different title company than the one involved in the previously discussed litigation in the process of making loans. The original complaint alleged violations of the Real Estate Settlement Procedures Act, the Sherman Act, and the Racketeer Influenced and Corrupt Organizations Act (“RICO”). The plaintiffs filed an Amended Complaint on September 30, 2020 that dropped the RICO claim, but they are continuing to pursue the Real Estate Settlement Procedures Act and Sherman Act claims. The defendants moved to dismiss the Sherman Act claim on October 14, 2020, and that motion was denied on April 2, 2021. On March 13, 2023 the court granted plaintiffs’ motion for class certification. The case is currently in the discovery phase. The Company and ESSA B&T intend to vigorously defend against plaintiffs’ allegations. To the extent that this matter could result in exposure to the Company and/or ESSA B&T, the amount or range of such exposure is not currently estimable but could be substantial.

Revenue Recognition

Revenue Recognition	6 Months Ended
	Mar. 31, 2023
Revenue From Contract With Customer [Abstract]
Revenue Recognition	14. Revenue Recognition Management determined that the primary sources of revenue associated with financial instruments, including interest income on loans and investments, along with certain noninterest revenue sources including investment security gains, loan servicing charges, gains on the sale of loans, and earnings on bank owned life insurance are not within the scope of Topic 606. Noninterest income within the scope of Topic 606 are as follows: Trust and Investment Fees Trust and asset management income is primarily comprised of fees earned from the management and administration of trusts and other customer assets. The Company’s performance obligation is generally satisfied over time and the resulting fees are recognized monthly, based upon the month-end market value of the assets under management and the applicable fee rate. Payment is generally received a few days after month end through a direct charge to customer’s accounts. The Company does not earn performance-based incentives. Optional services such as real estate sales and tax return preparation services are also available to existing trust and asset management customers. The Company’s performance obligation for these transactional-based services is generally satisfied, and related revenue recognized, at a point in time (i.e. as incurred). Payment is received shortly after services are rendered. Service Charges on Deposit Accounts Service charges on deposit accounts consist of account analysis fees (i.e. net fees earned on analyzed business and public checking accounts), monthly service fees, check orders, and other deposit account related fees. The Company’s performance obligation for account analysis fees and monthly service fees is generally satisfied, and the related revenue recognized, over the period in which the service is provided. Check orders and other deposit account related fees are largely transactional based, and therefore, the Company’s performance obligation is satisfied, and related revenue recognized, at a point in time. Payment for service charges on deposit accounts is primarily received immediately or in the following month through a direct charge to customers’ accounts. Fees, Exchange, and Other Service Charges Fees, interchange, and other service charges are primarily comprised of debit card income, ATM fees, cash management income, and other services charges. Debit card income is primarily comprised of interchange fees earned whenever the Company’s debit cards are processed through card payment networks such as Mastercard. ATM fees are primarily generated when a Company cardholder uses a non-Company ATM or a non-Company cardholder uses a company ATM. Other service charges include revenue from processing wire transfers, bill pay service, cashier’s checks, and other services. The Company’s performance obligation for fees, exchange, and other service charges are largely satisfied, and related revenue recognized when the services are rendered or upon completion. Payment is typically received immediately or in the following month. Insurance Commissions Insurance income primarily consists of commissions received on product sales. The Company acts as an intermediary between the Company’s customer and the insurance carrier. The Company’s performance obligation is generally satisfied upon the issuance of the policy. Shortly after the policy is issued, the carrier remits the commission payment to the Company, and the Company recognizes the revenue.

Leases

Leases	6 Months Ended
	Mar. 31, 2023
Leases [Abstract]
Leases	15. Leases A lease is defined as a contract, or part of a contract, that conveys the right to control the use of identified property, plant or equipment for a period of time in exchange for consideration. For the Company, Topic 842 primarily affects the accounting treatment for operating lease agreements in which the Company is the lessee. Lessee Accounting Substantially all of the leases in which the Company is the lessee are comprised of real estate property for branches, ATM locations, and office space with terms extending through 2044 . In accordance with Topic 842, operating lease agreements are required to be recognized on the Consolidated Balance sheet as a right-of-use (“ROU”) asset and a corresponding lease liability. The following table presents the Consolidated Balance Sheet classification of the Company’s ROU assets and lease liabilities. The Company elected not to include short-term leases (i.e., leases with initial terms of twelve months or less), or equipment leases (deemed immaterial) on the Consolidated Balance sheet. (in thousands) March 31, 2023 Lease Right-of-Use Assets Classification Operating lease right-of-use assets Other assets $ 5,639 Total Lease Right-Of-Use Assets $ 5,639 (in thousands) March 31, 2023 Lease Liabilities Classification Operating lease Liabilities Other liabilities $ 5,861 Total Lease Liabilities $ 5,861 (in thousands) September 30, 2022 Lease Right-of-Use Assets Classification Operating lease right-of-use assets Other assets $ 6,075 Total Lease Right-Of-Use Assets $ 6,075 (in thousands) September 30, 2022 Lease Liabilities Classification Operating lease Liabilities Other liabilities $ 6,275 Total Lease Liabilities $ 6,275 The calculated amount of the ROU assets and lease liabilities in the table above are impacted by the length of the lease term and the discount rate used to present value the minimum lease payments. The Company’s lease agreements often include one or more options to renew at the Company’s discretion. If at lease inception, the Company considers the exercising of a renewal option to be reasonably certain, the Company will include the extended term in the calculation of the ROU asset and lease liability. Regarding the discount rate, Topic 842 requires the use of the rate implicit in the lease whenever this rate is readily determinable. As this rate is rarely determinable, the Company utilizes its incremental borrowing rate at lease inception, on a collateralized basis, over a similar term. March 31, 2023 Weighted average remaining lease term Operating leases 12.2 years Weighted average discount rate Operating leases 2.40 % The following table represents lease costs and other lease information. As the Company elected, for all classes of underlying assets, not to separate lease and non-lease components and instead to account for them as a single lease component, the variable lease cost primarily represents variable payments such as common area maintenance and utilities. Lease Costs (in thousands) Three Months Ended March 31, 2023 Operating lease cost $ 238 Variable lease cost 62 Net lease cost $ 300 Lease Costs (in thousands) Three Months Ended March 31, 2022 Operating lease cost $ 240 Variable lease cost 101 Net lease cost $ 341 Lease Costs (in thousands) Six Months Ended March 31,2023 Operating lease cost $ 476 Variable lease cost 113 Net lease cost $ 589 Lease Costs (in thousands) Six Months Ended March 31,2022 Operating lease cost $ 501 Variable lease cost 180 Net lease cost $ 681 Future minimum payments for operating leases with initial or remaining terms of one year or more as of March 31, 2023 were as follows: (in thousands) Operating leases Twelve months Ended: March 31, 2024 $ 783 March 31, 2025 651 March 31, 2026 647 March 31, 2027 529 March 31, 2028 462 Thereafter 3,824 Total future minimum lease payments 6,896 Amounts representing interest 1,035 Present Value of Net Future Minimum Lease Payments $ 5,861

Accounting Pronouncements (Poli

Accounting Pronouncements (Policies)	6 Months Ended
	Mar. 31, 2023
Accounting Changes And Error Corrections [Abstract]
Recent Accounting Pronouncements	Recent Accounting Pronouncements In June 2016, the FASB issued ASU 2016-13, Financial Instruments – Credit Losses: Measurement of Credit Losses on Financial Instruments , which changes the impairment model for most financial assets. This Update is intended to improve financial reporting by requiring timelier recording of credit losses on loans and other financial instruments held by financial institutions and other organizations. The underlying premise of the Update is that financial assets measured at amortized cost should 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 allowance for credit losses should reflect management’s current estimate of credit losses that are expected to occur over the remaining life of a financial asset. The income statement will be effected for the measurement of credit losses for newly recognized financial assets, as well as the expected increases or decreases of expected credit losses that have taken place during the period. ASU 2016-13 is effective for annual and interim periods beginning after December 15, 2019, and early adoption is permitted for annual and interim periods beginning after December 15, 2018. With certain exceptions, transition to the new requirements will be through a cumulative effect adjustment to opening retained earnings as of the beginning of the first reporting period in which the guidance is adopted. In November 2019, the FASB issued ASU 2019-10, Financial Instruments ‒ Credit Losses (Topic 326), Derivatives and Hedging (Topic 815), and Leases (Topic 842) . This Update defers the effective date of ASU 2016-13 for SEC filers that are eligible to be smaller reporting companies, non-SEC filers, and all other companies to fiscal years beginning after December 15, 2022, including interim periods within those fiscal years. We expect to recognize a one-time cumulative effect adjustment to the allowance for loan losses as of the beginning of the first reporting period in which the new standard is effective, but cannot yet determine the magnitude of any such one-time adjustment or the overall impact of the new guidance on the consolidated financial statements. In May 2019, the FASB issued ASU 2019-05, Financial Instruments – Credit Losses (Topic 326) , which allows entities to irrevocably elect the fair value option for certain financial assets previously measured at amortized cost upon adoption of the new credit losses standard. To be eligible for the transition election, the existing financial asset must otherwise be both within the scope of the new credit losses standard and eligible for applying the fair value option in ASC 825-10.3. The election must be applied on an instrument-by-instrument basis and is not available for either available-for-sale or held-to-maturity debt securities. For entities that elect the fair value option, the difference between the carrying amount and the fair value of the financial asset would be recognized through a cumulative-effect adjustment to opening retained earnings as of the date an entity adopted ASU 2016-13. Changes in fair value of that financial asset would subsequently be reported in current earnings. For entities that have not yet adopted the credit losses standard, the ASU is effective when they implement the credit losses standard. For entities that already have adopted the credit losses standard, the ASU is effective for fiscal years beginning after December 15, 2019, including interim periods within those fiscal years. The Company qualifies as a smaller reporting company and does not expect to early adopt ASU 2016-13. In November 2019, the FASB issued ASU 2019-11, Codification Improvements to Topic 326, Financial Instruments – Credit Losses , to clarify its new credit impairment guidance in ASC 326, based on implementation issues raised by stakeholders. This Update clarified, among other things, that expected recoveries are to be included in the allowance for credit losses for these financial assets; an accounting policy election can be made to adjust the effective interest rate for existing troubled debt restructurings based on the prepayment assumptions instead of the prepayment assumptions applicable immediately prior to the restructuring event; and extends the practical expedient to exclude accrued interest receivable from all additional relevant disclosures involving amortized cost basis. For entities that have not yet adopted ASU 2016-13 as of November 26, 2019, the effective dates for ASU 2019-11 are the same as the effective dates and transition requirements in ASU 2016-13. For entities that have adopted ASU 2016-13, ASU 2019-11 is effective for fiscal years beginning after December 15, 2019, including interim periods within those fiscal years. The Company qualifies as a smaller reporting company and does not expect to early adopt these ASUs. In March 2020, the FASB issued ASU 2020-3 , Codification Improvements to Financial Instruments. This ASU was issued to improve and clarify various financial instruments topics, including the current expected credit losses (CECL) standard issued in 2016. The ASU includes seven issues that describe the areas of improvement and the related amendments to GAAP; they are intended to make the standards easier to understand and apply and to eliminate inconsistencies, and they are narrow in scope and are not expected to significantly change practice for most entities. Among its provisions, the ASU clarifies that all entities, other than public business entities that elected the fair value option, are required to provide certain fair value disclosures under ASC 825, Financial Instruments , in both interim and annual financial statements. It also clarifies that the contractual term of a net investment in a lease under Topic 842 should be the contractual term used to measure expected credit losses under Topic 326. Amendments related to ASU 2019-04 are effective for fiscal years beginning after December 15, 2019, including interim periods within those fiscal years. Early adoption is not permitted before an entity’s adoption of ASU 2016-01. Amendments related to ASU 2016-13 for entities that have not yet adopted that guidance are effective upon adoption of the amendments in ASU 2016-13. Early adoption is not permitted before an entity’s adoption of ASU 2016-13. Amendments related to ASU 2016-13 for entities that have adopted that guidance are effective for fiscal years beginning after December 15, 2019, including interim periods within those years. Other amendments are effective upon issuance of this ASU. This Update is not expected to have a significant impact on the Company’s financial statements. In March 2022, the FASB issued ASU 2022-01 , Derivatives and Hedging (ASC 815): Fair Value Hedging - Portfolio Layer Method . ASC 815 currently permits only prepayable financial assets and one or more beneficial interests secured by a portfolio of prepayable financial instruments to be included in a last-of-layer closed portfolio. The amendments in this Update allow non-prepayable financial assets to also be included in a closed portfolio hedged using the portfolio layer method. That expanded scope permits an entity to apply the same portfolio hedging method to both prepayable and non-prepayable financial assets, thereby allowing consistent accounting for similar hedges. The guidance is effective for public business entities for fiscal years, and interim periods within those fiscal years, beginning after December 15, 2022. The Company is currently evaluating the impact the adoption of the standard will have on the Company’s financial position or results of operations. In March 2022, the FASB issued ASU 2022-02, Financial Instruments - Credit Losses (ASC 326): Troubled Debt Restructurings (TDRs) and Vintage Disclosures . The guidance amends ASC 326 to eliminate the accounting guidance for TDRs by creditors, while enhancing disclosure requirements for certain loan refinancing and restructuring activities by creditors when a borrower is experiencing financial difficulty. Specifically, rather than applying TDR recognition and measurement guidance, creditors will determine whether a modification results in a new loan or continuation of existing loan. These amendments are intended to enhance existing disclosure requirements and introduce new requirements related to certain modifications of receivables made to borrowers experiencing financial difficulty. Additionally, the amendments to ASC 326 require that an entity disclose current-period gross writeoffs by year of origination within the vintage disclosures, which requires that an entity disclose the amortized cost basis of financing receivables by credit quality indicator and class of financing receivable by year of origination. The guidance is only for entities that have adopted the amendments in Update 2016-13 for fiscal years, and interim periods within those fiscal years, beginning after December 15, 2022. Early adoption using prospective application, including adoption in an interim period where the guidance should be applied as of the beginning of the fiscal year. The Company is currently evaluating the impact the adoption of the standard will have on the Company’s financial position or results of operations. In March 2023, the FASB issued ASU No. 2023-02, " Investments—Equity Method and Joint Ventures (Topic 323): Accounting for Investments in Tax Credit Structures Using the Proportional Amortization Method (a consensus of the Emerging Issues Task Force) ". The ASU allows entities to elect the proportional amortization method, on a tax-credit-program-by-tax-credit-program basis, for all equity investments in tax credit programs meeting the eligibility criteria in Accounting Standards Codification (ASC) 323-740-25-1. While the ASU does not significantly alter the existing eligibility criteria, it does provide clarifications to address existing interpretive issues. It also prescribes specific information reporting entities must disclose about tax credit investments each period. This ASU is effective for reporting periods beginning after December 15, 2023, for public business entities, or January 1, 2024 for the Company. The Company does not expect the adoption of this ASU to have a material impact on the Company's financial statements.

Earnings per Share (Tables)

Earnings per Share (Tables)	6 Months Ended
	Mar. 31, 2023
Earnings Per Share [Abstract]
Composition of the Weighted-Average Common Shares (Denominator) Used in the Basic and Diluted Earnings Per Share Computation	The following table sets forth the composition of the weighted-average common shares (denominator) used in the basic and diluted earnings per share computation for the three and six month periods ended March 31, 2023 and 2022. Three Months Ended Six Months Ended March 31, March 31, March 31, March 31, 2023 2022 2023 2022 Weighted-average common shares outstanding 18,133,095 18,133,095 18,133,095 18,133,095 Average treasury stock shares ( 7,730,573 ) ( 7,652,070 ) ( 7,732,689 ) ( 7,643,766 ) Average unearned ESOP shares ( 637,547 ) ( 661,946 ) ( 643,266 ) ( 667,665 ) Average unearned non-vested shares ( 47,031 ) ( 52,850 ) ( 49,803 ) ( 53,605 ) Weighted average common shares and common stock 9,717,944 9,766,229 9,707,337 9,768,059 Additional common stock equivalents (nonvested stock) 2,674 2,603 3,358 2,834 Weighted average common shares and common stock 9,720,618 9,768,832 9,710,695 9,770,893

Investment Securities (Tables)

Investment Securities (Tables)	6 Months Ended
	Mar. 31, 2023
Investments Debt And Equity Securities [Abstract]
Summary of Amortized Cost, Gross Unrealized Gains and Losses, and Fair Value of Investment Securities	The amortized cost, gross unrealized gains and losses, and fair value of investment securities are summarized as follows (in thousands): March 31, 2023 Amortized Gross Gross Fair Value Available for Sale Fannie Mae $ 57,532 $ 27 $ ( 3,870 ) $ 53,689 Freddie Mac 50,946 — ( 3,051 ) 47,895 Governmental National Mortgage Association 5,012 — ( 215 ) 4,797 Total mortgage-backed securities 113,490 27 ( 7,136 ) 106,381 Obligations of states and political subdivisions 10,805 — ( 637 ) 10,168 U.S. government agency securities 9,508 — ( 135 ) 9,373 Corporate obligations 76,504 — ( 6,446 ) 70,058 Other debt securities 7,877 — ( 567 ) 7,310 Total $ 218,184 $ 27 $ ( 14,921 ) $ 203,290 Held to Maturity Fannie Mae $ 29,204 $ - $ ( 4,235 ) $ 24,969 Freddie Mac 23,258 - ( 3,442 ) 19,816 Total mortgage-backed securities 52,462 - ( 7,677 ) 44,785 U.S. government agency securities 2,442 - ( 392 ) 2,050 Total $ 54,904 $ - $ ( 8,069 ) $ 46,835 September 30, 2022 Amortized Gross Gross Fair Value Available for sale Fannie Mae $ 61,118 $ 1 $ ( 5,432 ) $ 55,687 Freddie Mac 53,842 - ( 4,532 ) 49,310 Governmental National Mortgage Association securities 5,411 - ( 248 ) 5,163 Total mortgage-backed securities 120,371 1 ( 10,212 ) 110,160 Obligations of states and political subdivisions 10,815 - ( 895 ) 9,920 U.S. government agency securities 9,530 - ( 200 ) 9,330 Corporate obligations 76,692 14 ( 5,587 ) 71,119 Other debt securities 8,810 2 ( 694 ) 8,118 Total debt securities $ 226,218 $ 17 $ ( 17,588 ) $ 208,647 Held to maturity Fannie Mae $ 30,659 $ - $ ( 5,127 ) $ 25,532 Freddie Mac 24,187 - ( 4,142 ) 20,045 Total 54,846 - ( 9,269 ) 45,577 U.S. government agency securities 2,439 - ( 470 ) 1,969 Total debt securities $ 57,285 $ - $ ( 9,739 ) $ 47,546
Summary of Unrealized and Realized Gains Losses Recognized in Net Income on Equity Securities	The following is a summary of unrealized and realized gains and losses recognized in net income on equity securities during the three and six months ended March 31, 2023 and 2022. (in thousands) Three Months Ended March 31, 2023 Three Months Ended March 31, 2022 Net (losses) gains recognized during the period on equity securities $ ( 5 ) $ - Less: Net (losses) gains recognized during the period on equity securities sold - - Unrealized (losses) gains recognized during the reporting period on equity $ ( 5 ) $ - (in thousands) Six Months Ended March 31, 2023 Six Months Ended March 31, 2022 Net (losses) gains recognized during the period on equity securities $ ( 3 ) $ 1 Less: Net (losses) gains recognized during the period on equity securities sold - - Unrealized (losses) gains recognized during the reporting period on equity $ ( 3 ) $ 1
Schedule of Amortized Cost and Fair Value of Debt Securities by Contractual Maturity	The amortized cost and fair value of debt securities at March 31, 2023, by contractual maturity, are shown below. Expected maturities will differ from contractual maturities because borrowers may have the right to call or prepay obligations with or without call or prepayment penalties (in thousands): Available For Sale Held to Maturity Amortized Fair Value Amortized Fair Value Due in one year or less $ 8,255 $ 8,208 $ — $ — Due after one year through five years 37,005 35,420 — — Due after five years through ten years 70,502 63,997 7,487 6,553 Due after ten years 102,422 95,665 47,417 40,282 Total $ 218,184 $ 203,290 $ 54,904 $ 46,835
Schedule of Gross Unrealized Losses and Fair Value	The following tables show the Company’s gross unrealized losses and fair value, aggregated by investment category and length of time that the individual securities have been in a continuous unrealized loss position (dollars in thousands): March 31, 2023 Number of Less than Twelve Twelve Months or Total Fair Gross Fair Gross Fair Gross Fannie Mae 75 $ 19,523 $ ( 822 ) $ 57,252 $ ( 7,283 ) $ 76,775 $ ( 8,105 ) Freddie Mac 63 26,083 ( 964 ) 41,628 ( 5,529 ) 67,711 ( 6,493 ) Governmental National Mortgage 13 925 ( 22 ) 3,872 ( 193 ) 4,797 ( 215 ) U.S. government agency securities 3 9,373 ( 135 ) 2,050 ( 392 ) 11,423 ( 527 ) Obligations of states and political 12 1,699 ( 17 ) 8,469 ( 620 ) 10,168 ( 637 ) Corporate obligations 91 22,920 ( 1,242 ) 47,138 ( 5,204 ) 70,058 ( 6,446 ) Other debt securities 17 - - 6,894 ( 567 ) 6,894 ( 567 ) Total 274 $ 80,523 $ ( 3,202 ) $ 167,303 $ ( 19,788 ) $ 247,826 $ ( 22,990 ) September 30, 2022 Less than Twelve Twelve Months or Greater Total Number of Fair Gross Fair Gross Fair Gross Fannie Mae 74 $ 67,101 $ ( 8,344 ) $ 13,759 $ ( 2,215 ) $ 80,860 $ ( 10,559 ) Freddie Mac 63 59,954 ( 6,868 ) 9,401 ( 1,806 ) 69,355 ( 8,674 ) Governmental National Mortgage 13 2,924 ( 194 ) 2,182 ( 54 ) 5,106 ( 248 ) Obligations of states and political 12 9,920 ( 895 ) - - 9,920 ( 895 ) U.S. government agency securities 4 11,299 ( 670 ) - - 11,299 ( 670 ) Corporate obligations 88 49,333 ( 3,394 ) 19,773 ( 2,193 ) 69,106 ( 5,587 ) Other debt securities 17 5,764 ( 610 ) 1,759 ( 84 ) 7,523 ( 694 ) Total 271 $ 206,295 $ ( 20,975 ) $ 46,874 $ ( 6,352 ) $ 253,169 $ ( 27,327 )

Loans Receivable, Net and All_2

Loans Receivable, Net and Allowance for Loan Losses (Tables)	6 Months Ended
	Mar. 31, 2023
Receivables [Abstract]
Summary of Loans Receivable	Loans receivable consist of the following (in thousands): March 31, 2023 September 30, 2022 Real estate loans: Residential $ 671,357 $ 623,375 Construction 27,572 25,024 Commercial 748,379 678,841 Commercial 44,823 38,158 Obligations of states and political subdivisions 48,044 40,416 Home equity loans and lines of credit 43,623 43,170 Auto loans 1,499 3,611 Other 2,356 1,716 1,587,653 1,454,311 Less allowance for loan losses 18,315 18,528 Net loans $ 1,569,338 $ 1,435,783
Schedule of Loans Evaluated for Impairment	The following tables show the amount of loans in each category that were individually and collectively evaluated for impairment at the dates indicated (in thousands): Total Loans Individually Collectively March 31, 2023 Real estate loans: Residential $ 671,357 $ 1,217 $ 670,140 Construction 27,572 - 27,572 Commercial 748,379 8,073 740,306 Commercial 44,823 919 43,904 Obligations of states and political subdivisions 48,044 - 48,044 Home equity loans and lines of credit 43,623 32 43,591 Auto loans 1,499 2 1,497 Other 2,356 4 2,352 Total $ 1,587,653 $ 10,247 $ 1,577,406 Total Loans Individually Collectively September 30, 2022 Real estate loans: Residential $ 623,375 $ 1,342 $ 622,033 Construction 25,024 - 25,024 Commercial 678,841 12,165 666,676 Commercial 38,158 937 37,221 Obligations of states and political subdivisions 40,416 - 40,416 Home equity loans and lines of credit 43,170 36 43,134 Auto loans 3,611 16 3,595 Other 1,716 6 1,710 Total $ 1,454,311 $ 14,502 $ 1,439,809
Schedule of Investment and Unpaid Principal Balances for Impaired Loans	The following tables include the recorded investment and unpaid principal balances for impaired loans with the associated allowance amount at the dates indicated, if applicable (in thousands): Recorded Unpaid Associated March 31, 2023 With no specific allowance recorded: Real estate loans Residential $ 1,116 $ 1,722 $ - Construction - - - Commercial 7,270 7,994 - Commercial 369 409 - Obligations of states and political subdivisions - - - Home equity loans and lines of credit 32 66 - Auto loans 2 5 - Other 4 18 - Total 8,793 10,214 - With an allowance recorded: Real estate loans Residential 101 105 10 Construction - - - Commercial 803 935 5 Commercial 550 565 236 Obligations of states and political subdivisions - - - Home equity loans and lines of credit - - - Auto loans - - - Other - - - Total 1,454 1,605 251 Total: Real estate loans Residential 1,217 1,827 10 Construction - - - Commercial 8,073 8,929 5 Commercial 919 974 236 Obligations of states and political subdivisions - - - Home equity loans and lines of credit 32 66 - Auto loans 2 5 - Other 4 18 - Total Impaired Loans $ 10,247 $ 11,819 $ 251 Recorded Unpaid Associated September 30, 2022 With no specific allowance recorded: Real Estate Loans Residential $ 1,239 $ 2,029 $ - Construction - - - Commercial 8,384 8,987 - Commercial 865 905 - Obligations of states and political subdivisions - - - Home equity loans and lines of credit 36 68 - Auto Loans 16 28 - Other 6 19 - Total 10,546 12,036 - With an allowance recorded: Real Estate Loans Residential 103 108 12 Construction - - - Commercial 3,781 3,928 301 Commercial 72 83 38 Obligations of states and political subdivisions - - - Home equity loans and lines of credit - - - Auto Loans - - - Other - - - Total 3,956 4,119 351 Total: Real Estate Loans Residential 1,342 2,137 12 Construction - - - Commercial 12,165 12,915 301 Commercial 937 988 38 Obligations of states and political subdivisions - - - Home equity loans and lines of credit 36 68 - Auto Loans 16 28 - Other 6 19 - Total Impaired Loans $ 14,502 $ 16,155 $ 351 The following tables represents the average recorded investments in the impaired loans and the related amount of interest recognized during the time within the period that the impaired loans were impaired (in thousands): For the Three Months Ended March 31, 2023 2022 2023 2022 Average Average Interest Interest With no specific allowance recorded: Real estate loans Residential $ 1,156 $ 1,103 $ 1 $ - Construction - - - - Commercial 7,310 6,444 1 3 Commercial 369 77 - - Obligations of states and political subdivisions - - - - Home equity loans and lines of credit 33 292 - - Auto loans 4 28 - - Other 5 - - - Total 8,877 7,944 2 3 With an allowance recorded: Real estate loans Residential 102 107 - - Construction - - - - Commercial 3,393 28 - - Commercial 552 791 - - Obligations of states and political subdivisions - - - - Home equity loans and lines of credit - - - - Auto loans - - - - Other - - - - Total 4,047 926 - - Total: Real estate loans Residential 1,258 1,210 1 - Construction - - - - Commercial 10,703 6,472 1 3 Commercial 921 868 - Obligations of states and political subdivisions - - - - Home equity loans and lines of credit 33 292 - - Auto loans 4 28 - - Other 5 - - - Total Impaired Loans $ 12,924 $ 8,870 $ 2 $ 3 For the Six Months Ended March 31, 2023 2022 2023 2022 Average Average Interest Interest With no specific allowance recorded: Real estate loans Residential $ 1,186 $ 1,698 $ 2 $ 2 Construction - - - - Commercial 8,937 8,746 1 3 Commercial 534 93 - - Obligations of states and political subdivisions - - - - Home equity loans and lines of credit 34 301 - - Auto loans 5 25 - - Other 5 - - - Total 10,701 10,863 3 5 With an allowance recorded: Real estate loans Residential 102 112 - - Construction - - - - Commercial 2,481 21 - - Commercial 392 982 - - Obligations of states and political subdivisions - - - - Home equity loans and lines of credit - - - - Auto loans - 5 - - Other - - - - Total 2,975 1,120 - — Total: Real estate loans Residential 1,288 1,810 2 2 Construction - - - - Commercial 11,418 8,767 1 3 Commercial 926 1,075 - - Obligations of states and political subdivisions - - - - Home equity loans and lines of credit 34 301 - - Auto loans 5 30 - - Other 5 - - - Total Impaired Loans $ 13,676 $ 11,983 $ 3 $ 5
Classes of the Loan Portfolio, Internal Risk Rating System	The following tables present the classes of the loan portfolio summarized by the aggregate Pass and the criticized categories of Special Mention, Substandard, and Doubtful or Loss within the internal risk rating system at March 31, 2023 and September 30, 2022 (in thousands): Pass Special Substandard Doubtful Total March 31, 2023 Commercial real estate loans $ 734,312 $ 3,270 $ 10,797 $ - $ 748,379 Commercial 42,127 1,539 1,157 - 44,823 Obligations of states and political subdivisions 48,044 - - - 48,044 Total $ 824,483 $ 4,809 $ 11,954 $ - $ 841,246 Pass Special Substandard Doubtful Total September 30, 2022 Commercial real estate loans $ 659,104 $ 6,060 $ 13,677 $ - $ 678,841 Commercial 35,322 1,690 1,146 - 38,158 Obligations of states and political subdivisions 40,416 - - - 40,416 Total $ 734,842 $ 7,750 $ 14,823 $ - $ 757,415
Schedule of Performing or Nonperforming Loans	The following tables present the risk ratings in the consumer categories of performing and non-performing loans at March 31, 2023 and September 30, 2022 (in thousands): Performing Non- Total March 31, 2023 Real estate loans: Residential $ 669,098 $ 2,259 $ 671,357 Construction 27,572 - 27,572 Home equity loans and lines of credit 43,518 105 43,623 Auto loans 1,495 4 1,499 Other 2,321 35 2,356 Total $ 744,004 $ 2,403 $ 746,407 Performing Non- Total September 30, 2022 Real estate loans: Residential $ 621,781 $ 1,594 $ 623,375 Construction 25,024 - 25,024 Home equity loans and lines of credit 42,832 338 43,170 Auto loans 3,590 21 3,611 Other 1,710 6 1,716 Total $ 694,937 $ 1,959 $ 696,896
Classes of the Loan Portfolio Summarized by the Aging Categories	The following tables present the classes of the loan portfolio summarized by the aging categories of performing loans and nonaccrual loans as of March 31, 2023 and September 30, 2022 (in thousands): 31-60 Days 61-89 Days 90 + Days Total Total Current Past Due Past Due Past Due Past Due Loans March 31, 2023 Real estate loans: Residential $ 668,133 $ 901 $ 398 $ 1,925 $ 3,224 $ 671,357 Construction 27,572 - - - - 27,572 Commercial 739,418 2,405 69 6,487 8,961 748,379 Commercial 43,940 17 - 866 883 44,823 Obligations of states and political subdivisions 48,044 - - - - 48,044 Home equity loans and lines of credit 43,469 49 32 73 154 43,623 Auto loans 1,441 57 - 1 58 1,499 Other 2,322 4 - 30 34 2,356 Total $ 1,574,339 $ 3,433 $ 499 $ 9,382 $ 13,314 $ 1,587,653 31-60 Days 61-89 Days 90 + Days Total Total Current Past Due Past Due Past Due Past Due Loans September 30, 2022 Real estate loans: Residential $ 621,270 $ 598 $ 367 $ 1,140 $ 2,105 $ 623,375 Construction 25,024 - - - - 25,024 Commercial 672,875 5,719 - 247 5,966 678,841 Commercial 37,160 539 440 19 998 38,158 Obligations of states and political subdivisions 40,416 - - - - 40,416 Home equity loans and lines of credit 42,842 121 144 63 328 43,170 Auto loans 3,462 134 2 13 149 3,611 Other 1,685 - 31 - 31 1,716 Total $ 1,444,734 $ 7,111 $ 984 $ 1,482 $ 9,577 $ 1,454,311 Non-Accrual Loans March 31, 2023 September 30, 2022 Real estate loans: Residential $ 2,259 $ 1,594 Construction - - Commercial 8,073 12,165 Commercial 919 958 Obligations of states and - - Home equity loans and lines of 105 338 Auto loans 4 21 Other 35 6 Total $ 11,395 $ 15,082
Summary of Primary Segments of ALL	The following table summarizes changes in the primary segments of the ALL during the three months ended March 31, 2023 and 2022 (in thousands): Home Obligations of Equity States and Loans and Real Estate Loans Commercial Political Lines of Auto Other Residential Construction Commercial Loans Subdivisions Credit Loans Loans Unallocated Total ALL balance at December 31, 2022 $ 5,286 $ 328 $ 11,194 $ 1,048 $ 275 $ 372 $ 14 $ 22 $ 202 $ 18,741 Charge-offs - - ( 593 ) - - - ( 6 ) - - ( 599 ) Recoveries - - - - - 1 22 - - 23 Provision ( 416 ) - 415 137 ( 32 ) ( 37 ) ( 22 ) - 105 150 ALL balance at March 31, 2023 $ 4,870 $ 328 $ 11,016 $ 1,185 $ 243 $ 336 $ 8 $ 22 $ 307 $ 18,315 ALL balance at December 31, 2021 $ 4,098 $ 241 $ 10,607 $ 1,224 $ 265 $ 297 $ 196 $ 21 $ 1,261 $ 18,210 Charge-offs ( 5 ) - ( 19 ) - - - ( 15 ) - - ( 39 ) Recoveries - - 6 - - 2 29 - - 37 Provision 310 4 ( 44 ) ( 401 ) ( 19 ) 11 ( 121 ) ( 1 ) 261 - ALL balance at March 31, 2022 $ 4,403 $ 245 $ 10,550 $ 823 $ 246 $ 310 $ 89 $ 20 $ 1,522 $ 18,208 ALL balance at September 30, 2022 $ 5,122 $ 319 $ 10,754 $ 698 $ 283 $ 361 $ 22 $ 22 $ 947 $ 18,528 Charge-offs - - ( 593 ) - - - ( 27 ) - - ( 620 ) Recoveries 2 - 1 - - 52 52 - - 107 Provision ( 254 ) 9 854 487 ( 40 ) ( 77 ) ( 39 ) - ( 640 ) 300 ALL balance at March 31, 2023 $ 4,870 $ 328 $ 11,016 $ 1,185 $ 243 $ 336 $ 8 $ 22 $ 307 $ 18,315 ALL balance at September 30, 2021 $ 4,114 $ 187 $ 10,470 $ 1,041 $ 393 $ 318 $ 232 $ 21 $ 1,337 $ 18,113 Charge-offs ( 10 ) - ( 19 ) - - - ( 22 ) - - ( 51 ) Recoveries 72 - 7 - - 3 64 - - 146 Provision 227 58 92 ( 218 ) ( 147 ) ( 11 ) ( 185 ) ( 1 ) 185 - ALL balance at March 31, 2022 $ 4,403 $ 245 $ 10,550 $ 823 $ 246 $ 310 $ 89 $ 20 $ 1,522 $ 18,208 During the three months ended March 31, 2023, the Company recorded provision expense for the commercial real estate loans and commercial loans segments due to either increased loan balances, changes in the loan mix within the pool, and/or charge-off activity in those segments. Credit provisions were recorded for loan loss for the residential real estate loans, obligations of states and political subdivisions, home equity loans and lines of credit and auto loans due to either decreased loan balances, improved asset quality, changes in the loan mix within the pool, and/or decreased charge-off activity in those segments. During the three months ended March 31, 2022, the Company recorded provision expense for the residential real estate loans, construction real estate loans and home equity loans and lines of credit due to either increased loan balances, changes in the loan mix within the pool, and/or charge-off activity in those segments. Credit provisions were recorded for loan loss for the commercial real estate loans, commercial loans, obligations of states and political subdivisions, auto loans and other loan segments due to either decreased loan balances, improved asset quality, changes in the loan mix within the pool, and/or decreased charge-off activity in those segments. During the six months ended March 31, 2023, the Company recorded provision expense for the construction real estate loans, commercial real estate loans and commercial loans segments, due to either increased loan balances, changes in the loan mix within the pool, and/or charge-off activity in those segments. Credit provisions were recorded for loan loss for the residential real estate loans, obligations of states and political subdivisions, home equity loans and lines of credit and auto loans segments due to either decreased loan balances, changes in the loan mix within the pool, and/or decreased charge-off activity in those segments. During the six months ended March 31, 2022, the Company recorded provision expense for the residential real estate loans, construction real estate loans and the commercial real estate loans segments, due to either increased loan balances, changes in the loan mix within the pool, and/or charge-off activity in those segments. Credit provisions were recorded for loan loss for the commercial loans, obligations of states and political subdivisions, home equity loans and lines of credit and auto loans segments due to either decreased loan balances, improved asset quality, changes in the loan mix within the pool, and/or decreased charge-off activity in those segments. The following table summarizes the primary segments of the ALL, segregated into two categories, the amount required for loans individually evaluated for impairment and the amount required for loans collectively evaluated for impairment as of March 31, 2023 and September 30, 2022 (in thousands): Home Obligations of Equity States and Loans and Real Estate Loans Commercial Political Lines of Other Residential Construction Commercial Loans Subdivisions Credit Auto Loans Loans Unallocated Total Individually $ 10 $ - $ 5 $ 236 $ - $ - $ - $ - $ - $ 251 Collectively 4,860 328 11,011 949 243 336 8 22 307 18,064 ALL balance at March 31, 2023 $ 4,870 $ 328 $ 11,016 $ 1,185 $ 243 $ 336 $ 8 $ 22 $ 307 $ 18,315 Individually $ 12 $ - $ 301 $ 38 $ - $ - $ - $ - $ - $ 351 Collectively 5,110 319 10,453 660 283 361 22 22 947 18,177 ALL balance at September 30, 2022 $ 5,122 $ 319 $ 10,754 $ 698 $ 283 $ 361 $ 22 $ 22 $ 947 $ 18,528
Summary of Troubled Debt Restructurings Granted	The following is a summary of troubled debt restructuring granted during the three months ended March 31, 2022 and six months ended March 31, 2023 and 2022 (dollars in thousands): For the Three Months Ended March 31, 2022 Number of Pre-Modification Post-Modification Troubled Debt Restructurings Real estate loans: Residential 2 $ 88 $ 88 Construction — — — Commercial — — — Commercial — — — Obligations of states and political subdivisions — — — Home equity loans and lines of credit — — — Auto loans — — — Other — — — Total 2 $ 88 $ 88 For the Six Months Ended March 31, 2023 Number of Pre-Modification Post-Modification Troubled Debt Restructurings Real estate loans: Residential 1 $ 51 $ 54 Construction — — — Commercial — — — Commercial — — — Obligations of states and political subdivisions — — — Home equity loans and lines of credit — — — Auto loans — — — Other — — — Total 1 $ 51 $ 54 For the Six Months Ended March 31, 2022 Number of Pre-Modification Post-Modification Troubled Debt Restructurings Real estate loans: Residential 2 $ 88 $ 88 Construction — — — Commercial — — — Commercial — — — Obligations of states and political subdivisions — — — Home equity loans and lines of credit — — — Auto loans — — — Other — — — Total 2 $ 88 $ 88

Deposits (Tables)

Deposits (Tables)	6 Months Ended
	Mar. 31, 2023
Deposits Liabilities Disclosures [Abstract]
Schedule of Deposits by Major Classifications	Deposits consist of the following major classifications (in thousands): March 31, 2023 September 30, 2022 Non-interest bearing demand accounts $ 274,274 $ 290,061 Interest bearing demand accounts 295,212 357,516 Money market accounts 354,371 402,080 Savings and club accounts 176,402 196,696 Certificates of deposit 329,038 133,668 Total $ 1,429,297 $ 1,380,021

Net Periodic Benefit Cost-Def_2

Net Periodic Benefit Cost-Defined Benefit Plan (Tables)	6 Months Ended
	Mar. 31, 2023
Compensation And Retirement Disclosure [Abstract]
Summary of the Components of Net Periodic Benefit Cost (Income)	The following table comprises the components of net periodic benefit cost (income) for the three and six month periods ended March 31, 2023 and 2022 (in thousands): For the Three Months Ended March 31, For the Six Months Ended March 31, 2023 2022 2023 2022 Service Cost $ - $ - $ - $ - Interest Cost 164 131 328 256 Expected return on plan assets ( 242 ) ( 339 ) ( 484 ) ( 672 ) Partial settlement - 83 — 221 Amortization of net loss from earlier periods - 1 — 2 Net periodic benefit income $ ( 78 ) $ ( 124 ) $ ( 156 ) $ ( 193 )

Equity Incentive Plan (Tables)

Equity Incentive Plan (Tables)	6 Months Ended
	Mar. 31, 2023
Postemployment Benefits [Abstract]
Schedule of Restricted Stock Option Activity	The following is a summary of the status of the Company’s restricted stock as of March 31, 2023, and changes therein during the six month period then ended: Number of Stock Weighted- Nonvested at September 30, 2022 35,639 $ 14.88 Granted 31,696 19.06 Vested ( 11,441 ) 18.33 Forfeited — — Nonvested at March 31, 2023 55,894 $ 17.06

Fair Value (Tables)

Fair Value (Tables)	6 Months Ended
	Mar. 31, 2023
Fair Value Disclosures [Abstract]
Schedule of Fair Value For Assets and Liabilities Required to be Measured and Reported at Fair Value on a Recurring Basis	The following tables provide the fair value for assets and liabilities required to be measured and reported at fair value on a recurring basis on the Consolidated Balance Sheet as of March 31, 2023 and September 30, 2022 by level within the fair value hierarchy (in thousands). Recurring Fair Value Measurements at Reporting Date March 31, 2023 Assets Level I Level II Level III Total Investment securities available for sale: Mortgage backed securities $ - $ 106,381 $ - $ 106,381 Obligations of states and political subdivisions - 10,168 - 10,168 U.S. government agency securities - 9,373 - 9,373 Corporate obligations - 66,629 3,429 70,058 Other debt securities - 7,310 - 7,310 Total debt securities $ - $ 199,861 $ 3,429 $ 203,290 Equity securities- financial services 32 - - 32 Derivatives and hedging activities - 18,284 - 18,284 Liabilities Derivatives and hedging activities $ - $ 6,913 $ - $ 6,913 September 30, 2022 Assets Level I Level II Level III Total Investment securities available for sale: Mortgage backed securities $ - $ 110,160 $ - $ 110,160 Obligations of states and political subdivisions - 9,920 - 9,920 U.S. government agency securities - 9,330 - 9,330 Corporate obligations - 63,745 7,374 71,119 Other debt securities - 8,118 - 8,118 Total debt securities $ - $ 201,273 $ 7,374 $ 208,647 Equity securities-financial services 36 - - 36 Derivatives and hedging activities - 24,481 - 24,481 Liabilities: Derivatives and hedging activities $ - $ 9,176 $ - $ 9,176
Schedule of Changes in Fair Value of Level III Investments	The following table presents a summary of changes in the fair value of the Company’s Level III investments for the three and six month periods ended March 31, 2023 and 2022 (in thousands). Fair Value Measurement Using Three Months Ended March 31, 2023 March 31, 2022 Beginning balance $ 7,199 $ 10,937 Purchases, sales, issuances, settlements, net - ( 500 ) Total unrealized (loss) gain: Included in earnings - - Included in other comprehensive (loss) income ( 253 ) ( 175 ) Transfers in and/or out of Level III ( 3,517 ) 500 $ 3,429 $ 10,762 Fair Value Measurement Using Six Months Ended March 31, 2023 March 31, 2022 Beginning balance $ 7,374 $ 11,112 Purchases, sales, issuances, settlements, net - ( 500 ) Total unrealized gain (loss): Included in earnings - - Included in other comprehensive (loss) income ( 428 ) ( 350 ) Transfers in and/or out of Level III ( 3,517 ) 500 $ 3,429 $ 10,762
Schedule of Fair Value For Assets Required to be Measured and Reported at Fair Value on a Nonrecurring Basis	The following tables provide the fair value for assets required to be measured and reported at fair value on a non-recurring basis on the Consolidated Balance Sheet as of March 31, 2023 and September 30, 2022 by level within the fair value hierarchy: Non-Recurring Fair Value Measurements at Reporting Date (in thousands) March 31, 2023 Level I Level II Level III Total Foreclosed real estate $ - $ - $ 3,546 $ 3,546 Impaired loans - - 9,996 9,996 September 30, 2022 Level I Level II Level III Total Foreclosed real estate $ - $ - $ 29 $ 29 Impaired loans - - 14,151 14,151
Summary of Additional Quantitative Information about Assets Measured at Fair Value on a Nonrecurring Basis	The following tables present additional quantitative information about assets measured at fair value on a nonrecurring basis and for which the Company has utilized Level 3 inputs to determine fair value: Quantitative Information about Level 3 Fair Value Measurements (dollars in thousands) Fair Value Valuation Unobservable Range (Average) March 31, 2023 Impaired loans $ 9,996 Appraisal of Appraisal 0 % to 35 % 20.8 %) Foreclosed real estate owned 3,546 Appraisal of Appraisal 20 % to 35 % 20.1 %) Quantitative Information about Level 3 Fair Value Measurements (dollars in thousands) Fair Value Valuation Unobservable Range (Average) September 30, 2022 Impaired loans $ 14,151 Appraisal of Appraisal 0 % to 35 % 20.6 %) Foreclosed real estate owned 29 Appraisal of Appraisal 20 % 20.0 %) (1) Fair value is generally determined through independent appraisals of the underlying collateral, which generally include various level 3 inputs which are not identifiable. (2) Appraisals may be adjusted by management for qualitative factors such as economic conditions and estimated liquidation expenses. The range of liquidation expenses and other appraisal adjustments are presented as a percent of the appraisal.
Schedule of Carrying Value and Fair Value for Certain Financial Instruments not Required to be Measured and Reported at Fair Value	The following tables provide the carrying value and fair value for certain financial instruments that are not required to be measured or reported at fair value on the Consolidated Balance Sheet at March 31, 2023 and September 30, 2022 by level within the fair value hierarchy: March 31, 2023 (in thousands) Carrying Value Level I Level II Level III Total Fair Financial assets: Investment securities held to maturity $ 54,904 $ - $ 46,835 $ - $ 46,835 Loans receivable, net 1,569,338 - - 1,464,066 1,464,066 Mortgage servicing rights 798 - - 1,306 1,306 Financial liabilities: Deposits $ 1,429,297 $ 1,100,259 $ - $ 247,262 $ 1,347,521 Short term borrowings 301,478 — — 289,842 289,842 September 30, 2022 (in thousands) Carrying Value Level I Level II Level III Total Fair Financial assets: Investment securities held to maturity $ 57,285 $ - $ 47,546 $ - $ 47,546 Loans receivable, net 1,435,783 - - 1,351,823 1,351,823 Mortgage servicing rights 788 - - 1,390 1,390 Financial liabilities: Deposits $ 1,380,021 $ 1,246,353 $ - $ 128,533 $ 1,374,886 Short-term borrowings 230,810 - - 215,287 215,287

Accumulated Other Comprehensi_2

Accumulated Other Comprehensive Income (Loss) (Tables)	6 Months Ended
	Mar. 31, 2023
Equity [Abstract]
Summary of Activity in Accumulated Other Comprehensive Income (Loss)	The activity in accumulated other comprehensive income (loss) for the three and six month periods ended March 31, 2023 and 2022 is as follows (in thousands): Accumulated Other Defined Unrealized Gains Derivatives Total Balance at December 31, 2022 $ ( 1,108 ) $ ( 13,041 ) $ 11,172 $ ( 2,977 ) Other comprehensive (loss) income before - 1,277 ( 374 ) 903 Amounts reclassified from accumulated - - ( 1,810 ) ( 1,810 ) Period change — 1,277 ( 2,184 ) ( 907 ) Balance at March 31, 2023 $ ( 1,108 ) $ ( 11,764 ) $ 8,988 $ ( 3,884 ) Balance at December 31, 2021 $ ( 1,034 ) $ 1,119 $ 2,504 $ 2,589 Other comprehensive (loss) income before ( 54 ) ( 4,153 ) 5,392 1,185 Amounts reclassified from accumulated 66 - 131 197 Period change 12 ( 4,153 ) 5,523 1,382 Balance at March 31, 2022 $ ( 1,022 ) $ ( 3,034 ) $ 8,027 $ 3,971 Accumulated Other Defined Unrealized Gains Derivatives Total Balance at September 30, 2022 $ ( 1,108 ) $ ( 13,879 ) $ 12,093 $ ( 2,894 ) Other comprehensive income (loss) before — 2,115 153 2,268 Amounts reclassified from accumulated other — — ( 3,258 ) ( 3,258 ) Period change — 2,115 ( 3,105 ) ( 990 ) Balance at March 31, 2023 $ ( 1,108 ) $ ( 11,764 ) $ 8,988 $ ( 3,884 ) Balance at September 30, 2021 $ ( 1,907 ) $ 1,962 $ 627 $ 682 Other comprehensive income (loss) before reclassifications 710 ( 4,996 ) 7,082 2,796 Amounts reclassified from accumulated other 175 — 318 493 Period change 885 ( 4,996 ) 7,400 3,289 Balance at March 31, 2022 $ ( 1,022 ) $ ( 3,034 ) $ 8,027 $ 3,971
Summary of Reclassification Out of Accumulated Other Comprehensive Income (Loss)	The following table presents significant amounts reclassified out of each component of accumulated other comprehensive income (loss) for the three and six month periods ended March 31, 2023 and 2022 (in thousands): Amount Reclassified from Details About Accumulated Other Comprehensive Income (Loss) Components Accumulated Other Comprehensive Income (Loss) for the Three Months Ended March 31, Affected Line Item in the 2023 2022 Securities available for sale: Defined benefit pension plan Amortization of net gain and prior service costs $ - $ ( 84 ) Compensation and employee benefits Related income tax expense - 18 Income taxes Net effect on accumulated other comprehensive income (loss) - ( 66 ) Derivatives and hedging activities: Interest expense, effective portion 2,293 ( 166 ) Interest expense Related income tax expense ( 483 ) 35 Income taxes Net effect on accumulated other comprehensive income (loss) 1,810 ( 131 ) Total reclassification for the period $ 1,810 $ ( 197 ) Amount Reclassified from Accumulated Other Comprehensive Income (Loss) For the Six Months Ended March 31, Affected Line Item in the 2023 2022 Defined benefit pension plan Amortization of net (loss) gain and prior service costs - ( 223 ) Related income tax expense - 48 Income taxes Net effect on accumulated other comprehensive income (loss) - ( 175 ) Derivative and hedging activities: Interest expense, effective portion 4,127 ( 402 ) Interest expense Related income tax expense ( 869 ) 84 Income taxes Net effect on accumulated other comprehensive income (loss) 3,258 ( 318 ) Total reclassification for the period $ 3,258 $ ( 493 )

Derivatives and Hedging Activit

Derivatives and Hedging Activities (Tables)	6 Months Ended
	Mar. 31, 2023
Derivative Instruments And Hedging Activities Disclosure [Abstract]
Schedule of Fair Value of Derivative Financial Instruments as well as their Classification on Consolidated Balance Sheet	The table below presents the fair value of the Company’s derivative financial instruments as of March 31, 2023 and September 30, 2022 (in thousands). Fair Values of Derivative Instruments Asset Derivatives As of March 31, 2023 As of September 30, 2022 Hedged Item Notional Fair Notional Fair FHLB Advances $ 215,000 $ 11,379 $ 225,000 $ 15,310 Commercial Loans 83,149 6,905 79,602 9,171 Total $ 298,149 $ 18,284 $ 304,602 $ 24,481 Fair Values of Derivative Instruments Liability Derivatives As of March 31, 2023 As of September 30, 2022 Hedged Item Notional Fair Notional Fair Commercial Loans $ 114,808 $ 6,913 $ 111,668 $ 9,176 Total $ 114,808 $ 6,913 $ 111,668 $ 9,176
Schedule of Effect of Fair Value and Cash Flow Hedge Accounting on Accumulated Other Comprehensive Income (Loss)	The table below presents the effect of the Company’s cash flow hedge accounting on Accumulated Other Comprehensive Income (Loss) for the three and six month periods ended March 31, 2023 and 2022 (in thousands). The Effect of Fair Value and Cash Flow Hedge Accounting on Accumulated Other Comprehensive Income (Loss) Derivatives in Hedging Relationships (Gain) Loss Recognized in Location of Gain Gain (Loss) Reclassified Derivatives in Cash Flow Hedging Relationships 2023 2022 2023 2022 Interest Rate Products $ ( 2,768 ) $ 6,992 Interest expense $ 2,293 $ ( 166 ) Total $ ( 2,768 ) $ 6,992 $ 2,293 $ ( 166 ) Derivatives in Cash Flow Gain (Loss) Recognized in Location of Gain Gain (Loss) Recognized 2023 2022 2023 2022 Interest Rate Products $ ( 3,934 ) $ 5,546 Interest expense $ 4,127 $ ( 402 ) Total $ ( 3,934 ) $ 5,546 $ 4,127 $ ( 402 )

Leases (Tables)

Leases (Tables)	6 Months Ended
	Mar. 31, 2023
Leases [Abstract]
Summary of Balance Sheet Operating Lease Right-of-Use Assets and Lease Liabilities	The following table presents the Consolidated Balance Sheet classification of the Company’s ROU assets and lease liabilities. The Company elected not to include short-term leases (i.e., leases with initial terms of twelve months or less), or equipment leases (deemed immaterial) on the Consolidated Balance sheet. (in thousands) March 31, 2023 Lease Right-of-Use Assets Classification Operating lease right-of-use assets Other assets $ 5,639 Total Lease Right-Of-Use Assets $ 5,639 (in thousands) March 31, 2023 Lease Liabilities Classification Operating lease Liabilities Other liabilities $ 5,861 Total Lease Liabilities $ 5,861 (in thousands) September 30, 2022 Lease Right-of-Use Assets Classification Operating lease right-of-use assets Other assets $ 6,075 Total Lease Right-Of-Use Assets $ 6,075 (in thousands) September 30, 2022 Lease Liabilities Classification Operating lease Liabilities Other liabilities $ 6,275 Total Lease Liabilities $ 6,275
Summary of Lease Term and Discount Rate	The calculated amount of the ROU assets and lease liabilities in the table above are impacted by the length of the lease term and the discount rate used to present value the minimum lease payments. The Company’s lease agreements often include one or more options to renew at the Company’s discretion. If at lease inception, the Company considers the exercising of a renewal option to be reasonably certain, the Company will include the extended term in the calculation of the ROU asset and lease liability. Regarding the discount rate, Topic 842 requires the use of the rate implicit in the lease whenever this rate is readily determinable. As this rate is rarely determinable, the Company utilizes its incremental borrowing rate at lease inception, on a collateralized basis, over a similar term. March 31, 2023 Weighted average remaining lease term Operating leases 12.2 years Weighted average discount rate Operating leases 2.40 %
Summary of Components of Lease Cost	The following table represents lease costs and other lease information. As the Company elected, for all classes of underlying assets, not to separate lease and non-lease components and instead to account for them as a single lease component, the variable lease cost primarily represents variable payments such as common area maintenance and utilities. Lease Costs (in thousands) Three Months Ended March 31, 2023 Operating lease cost $ 238 Variable lease cost 62 Net lease cost $ 300 Lease Costs (in thousands) Three Months Ended March 31, 2022 Operating lease cost $ 240 Variable lease cost 101 Net lease cost $ 341 Lease Costs (in thousands) Six Months Ended March 31,2023 Operating lease cost $ 476 Variable lease cost 113 Net lease cost $ 589 Lease Costs (in thousands) Six Months Ended March 31,2022 Operating lease cost $ 501 Variable lease cost 180 Net lease cost $ 681
Summary of Future Minimum Lease Payments	Future minimum payments for operating leases with initial or remaining terms of one year or more as of March 31, 2023 were as follows: (in thousands) Operating leases Twelve months Ended: March 31, 2024 $ 783 March 31, 2025 651 March 31, 2026 647 March 31, 2027 529 March 31, 2028 462 Thereafter 3,824 Total future minimum lease payments 6,896 Amounts representing interest 1,035 Present Value of Net Future Minimum Lease Payments $ 5,861

Earnings Per Share - Compositio

Earnings Per Share - Composition of the Weighted-Average Common Shares (Denominator) Used in the Basic and Diluted Earnings per Share Computation (Detail) - shares	3 Months Ended		6 Months Ended
	Mar. 31, 2023	Mar. 31, 2022	Mar. 31, 2023	Mar. 31, 2022
Earnings Per Share [Abstract]
Weighted-average common shares outstanding	18,133,095	18,133,095	18,133,095	18,133,095
Average treasury stock shares	(7,730,573)	(7,652,070)	(7,732,689)	(7,643,766)
Average unearned ESOP shares	(637,547)	(661,946)	(643,266)	(667,665)
Average unearned non-vested shares	(47,031)	(52,850)	(49,803)	(53,605)
Weighted average common shares and common stock equivalents used to calculate basic earnings per share	9,717,944	9,766,229	9,707,337	9,768,059
Additional common stock equivalents (nonvested stock) used to calculate diluted earnings per share	2,674	2,603	3,358	2,834
Weighted average common shares and common stock equivalents used to calculate diluted earnings per share	9,720,618	9,768,832	9,710,695	9,770,893

Earnings Per Share - Additional

Earnings Per Share - Additional Information (Detail) - Stock Option [Member] - $ / shares	6 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Anti-dilutive securities	0	29,974
Average weighted price per share of anti-dilutive shares		$ 16.47

Investment Securities - Summary

Investment Securities - Summary of Amortized Cost, Gross Unrealized Gains and Losses, and Fair Value of Investment Securities (Detail) - USD ($) $ in Thousands	Mar. 31, 2023	Sep. 30, 2022
Schedule Of Available For Sale Securities [Line Items]
Available for sale, Amortized Cost	$ 218,184
Available for sale, Fair Value	203,290	$ 208,647
Held to maturity, Amortized Cost	54,904	57,285
Fannie Mae [Member]
Schedule Of Available For Sale Securities [Line Items]
Available for sale, Amortized Cost	57,532	61,118
Available for sale, Gross Unrealized Gains	27	1
Available for sale, Gross Unrealized Losses	(3,870)	(5,432)
Available for sale, Fair Value	53,689	55,687
Held to maturity, Amortized Cost	29,204	30,659
Held to maturity, Gross Unrealized Losses	(4,235)	(5,127)
Held to maturity, Fair Value	24,969	25,532
Freddie Mac [Member]
Schedule Of Available For Sale Securities [Line Items]
Available for sale, Amortized Cost	50,946	53,842
Available for sale, Gross Unrealized Losses	(3,051)	(4,532)
Available for sale, Fair Value	47,895	49,310
Held to maturity, Amortized Cost	23,258	24,187
Held to maturity, Gross Unrealized Losses	(3,442)	(4,142)
Held to maturity, Fair Value	19,816	20,045
Governmental National Mortgage Association [Member]
Schedule Of Available For Sale Securities [Line Items]
Available for sale, Amortized Cost	5,012	5,411
Available for sale, Gross Unrealized Losses	(215)	(248)
Available for sale, Fair Value	4,797	5,163
Mortgage-Backed Securities [Member]
Schedule Of Available For Sale Securities [Line Items]
Available for sale, Amortized Cost	113,490	120,371
Available for sale, Gross Unrealized Gains	27	1
Available for sale, Gross Unrealized Losses	(7,136)	(10,212)
Available for sale, Fair Value	106,381	110,160
Held to maturity, Amortized Cost	52,462	54,846
Held to maturity, Gross Unrealized Losses	(7,677)	(9,269)
Held to maturity, Fair Value	44,785	45,577
Obligations of States and Political Subdivisions [Member]
Schedule Of Available For Sale Securities [Line Items]
Available for sale, Amortized Cost	10,805	10,815
Available for sale, Gross Unrealized Losses	(637)	(895)
Available for sale, Fair Value	10,168	9,920
U.S. Government Agency Securities [Member]
Schedule Of Available For Sale Securities [Line Items]
Available for sale, Amortized Cost	9,508	9,530
Available for sale, Gross Unrealized Losses	(135)	(200)
Available for sale, Fair Value	9,373	9,330
Held to maturity, Amortized Cost	2,442	2,439
Held to maturity, Gross Unrealized Losses	(392)	(470)
Held to maturity, Fair Value	2,050	1,969
Corporate Obligations [Member]
Schedule Of Available For Sale Securities [Line Items]
Available for sale, Amortized Cost	76,504	76,692
Available for sale, Gross Unrealized Gains		14
Available for sale, Gross Unrealized Losses	(6,446)	(5,587)
Available for sale, Fair Value	70,058	71,119
Other Debt Securities [Member]
Schedule Of Available For Sale Securities [Line Items]
Available for sale, Amortized Cost	7,877	8,810
Available for sale, Gross Unrealized Gains		2
Available for sale, Gross Unrealized Losses	(567)	(694)
Available for sale, Fair Value	7,310	8,118
Total Debt Securities [Member]
Schedule Of Available For Sale Securities [Line Items]
Available for sale, Amortized Cost	218,184	226,218
Available for sale, Gross Unrealized Gains	27	17
Available for sale, Gross Unrealized Losses	(14,921)	(17,588)
Available for sale, Fair Value	203,290	208,647
Held to maturity, Amortized Cost	54,904	57,285
Held to maturity, Gross Unrealized Losses	(8,069)	(9,739)
Held to maturity, Fair Value	$ 46,835	$ 47,546

Investment Securities - Summa_2

Investment Securities - Summary of Unrealized and Realized Gains Losses Recognized in Net Income on Equity Securities (Detail) - USD ($) $ in Thousands	3 Months Ended	6 Months Ended
	Mar. 31, 2023	Mar. 31, 2023	Mar. 31, 2022
Investments Debt And Equity Securities [Abstract]
Net gains recognized during the period on equity securities	$ (5)	$ (3)	$ 1
Unrealized gains recognized during the reporting period on equity securities still held at the reporting date	$ (5)	$ (3)	$ 1

Investment Securities - Schedul

Investment Securities - Schedule of Amortized Cost and Fair Value of Debt Securities by Contractual Maturity (Detail) - USD ($) $ in Thousands	Mar. 31, 2023	Sep. 30, 2022
Available-for-sale Securities, Debt Maturities, Amortized Cost Basis, Fiscal Year Maturity [Abstract]
Due in one year or less, Amortized Cost	$ 8,255
Due after one year through five years, Amortized Cost	37,005
Due after five years through ten years, Amortized Cost	70,502
Due after ten years, Amortized Cost	102,422
Available for sale, Amortized Cost	218,184
Available-for-sale Securities, Debt Maturities, Fair Value, Fiscal Year Maturity [Abstract]
Due in one year or less, Fair Value	8,208
Due after one year through five years, Fair Value	35,420
Due after five years through ten years, Fair Value	63,997
Due after ten years, Fair Value	95,665
Total, Fair Value	203,290	$ 208,647
Held to maturity Securities, Debt Maturities, Amortized Cost Basis, Fiscal Year Maturity [Abstract]
Due after five years through ten years, Amortized Cost	7,487
Due after ten years, Amortized Cost	47,417
Total, Amortized Cost	54,904
Held to maturity Securities, Debt Maturities, Fair Value, Fiscal Year Maturity [Abstract]
Due after five years through ten years, Fair Value	6,553
Due after ten years, Fair Value	40,282
Total, Fair Value	$ 46,835

Investment Securities - Additio

Investment Securities - Additional Information (Detail) - USD ($)	3 Months Ended
	Dec. 31, 2022	Dec. 31, 2021
Amortized Cost And Fair Value Debt Securities [Abstract]
Realized gross gains	$ 0	$ 0
Realized gross losses	$ 0	$ 0

Investment Securities - Sched_2

Investment Securities - Schedule of Gross Unrealized Losses and Fair Value (Detail) $ in Thousands	Mar. 31, 2023 USD ($) Security	Sep. 30, 2022 USD ($) Security
Schedule Of Available For Sale Securities [Line Items]
Number of Securities, Debt | Security	274	271
Fair Value, Less than Twelve Months, Debt	$ 80,523	$ 206,295
Gross Unrealized Losses, Less than Twelve Months, Debt	(3,202)	(20,975)
Fair Value, Twelve Months or Greater, Debt	167,303	46,874
Gross Unrealized Losses, Twelve Months or Greater, Debt	(19,788)	(6,352)
Fair Value Total, Debt	247,826	253,169
Gross Unrealized Losses Total, Debt	$ (22,990)	$ (27,327)
Fannie Mae [Member]
Schedule Of Available For Sale Securities [Line Items]
Number of Securities, Debt | Security	75	74
Fair Value, Less than Twelve Months, Debt	$ 19,523	$ 67,101
Gross Unrealized Losses, Less than Twelve Months, Debt	(822)	(8,344)
Fair Value, Twelve Months or Greater, Debt	57,252	13,759
Gross Unrealized Losses, Twelve Months or Greater, Debt	(7,283)	(2,215)
Fair Value Total, Debt	76,775	80,860
Gross Unrealized Losses Total, Debt	$ (8,105)	$ (10,559)
Freddie Mac [Member]
Schedule Of Available For Sale Securities [Line Items]
Number of Securities, Debt | Security	63	63
Fair Value, Less than Twelve Months, Debt	$ 26,083	$ 59,954
Gross Unrealized Losses, Less than Twelve Months, Debt	(964)	(6,868)
Fair Value, Twelve Months or Greater, Debt	41,628	9,401
Gross Unrealized Losses, Twelve Months or Greater, Debt	(5,529)	(1,806)
Fair Value Total, Debt	67,711	69,355
Gross Unrealized Losses Total, Debt	$ (6,493)	$ (8,674)
U.S. Government Agency Securities [Member]
Schedule Of Available For Sale Securities [Line Items]
Number of Securities, Debt | Security	3	4
Fair Value, Less than Twelve Months, Debt	$ 9,373	$ 11,299
Gross Unrealized Losses, Less than Twelve Months, Debt	(135)	(670)
Fair Value, Twelve Months or Greater, Debt	2,050
Gross Unrealized Losses, Twelve Months or Greater, Debt	(392)
Fair Value Total, Debt	11,423	11,299
Gross Unrealized Losses Total, Debt	$ (527)	$ (670)
Obligations of States and Political Subdivisions [Member]
Schedule Of Available For Sale Securities [Line Items]
Number of Securities, Debt | Security	12	12
Fair Value, Less than Twelve Months, Debt	$ 1,699	$ 9,920
Gross Unrealized Losses, Less than Twelve Months, Debt	(17)	(895)
Fair Value, Twelve Months or Greater, Debt	8,469
Gross Unrealized Losses, Twelve Months or Greater, Debt	(620)
Fair Value Total, Debt	10,168	9,920
Gross Unrealized Losses Total, Debt	$ (637)	$ (895)
Corporate Obligations [Member]
Schedule Of Available For Sale Securities [Line Items]
Number of Securities, Debt | Security	91	88
Fair Value, Less than Twelve Months, Debt	$ 22,920	$ 49,333
Gross Unrealized Losses, Less than Twelve Months, Debt	(1,242)	(3,394)
Fair Value, Twelve Months or Greater, Debt	47,138	19,773
Gross Unrealized Losses, Twelve Months or Greater, Debt	(5,204)	(2,193)
Fair Value Total, Debt	70,058	69,106
Gross Unrealized Losses Total, Debt	$ (6,446)	$ (5,587)
Other Debt Securities [Member]
Schedule Of Available For Sale Securities [Line Items]
Number of Securities, Debt | Security	17	17
Fair Value, Less than Twelve Months, Debt		$ 5,764
Gross Unrealized Losses, Less than Twelve Months, Debt		(610)
Fair Value, Twelve Months or Greater, Debt	$ 6,894	1,759
Gross Unrealized Losses, Twelve Months or Greater, Debt	(567)	(84)
Fair Value Total, Debt	6,894	7,523
Gross Unrealized Losses Total, Debt	$ (567)	$ (694)
Governmental National Mortgage Association [Member]
Schedule Of Available For Sale Securities [Line Items]
Number of Securities, Debt | Security	13	13
Fair Value, Less than Twelve Months, Debt	$ 925	$ 2,924
Gross Unrealized Losses, Less than Twelve Months, Debt	(22)	(194)
Fair Value, Twelve Months or Greater, Debt	3,872	2,182
Gross Unrealized Losses, Twelve Months or Greater, Debt	(193)	(54)
Fair Value Total, Debt	4,797	5,106
Gross Unrealized Losses Total, Debt	$ (215)	$ (248)

Loans Receivable, Net and All_3

Loans Receivable, Net and Allowance for Loan Losses - Summary of Loans Receivable (Detail) - USD ($) $ in Thousands	Mar. 31, 2023	Dec. 31, 2022	Sep. 30, 2022	Mar. 31, 2022	Dec. 31, 2021	Sep. 30, 2021
Real estate loans:
Total Loans	$ 1,587,653		$ 1,454,311
Less allowance for loan losses	18,315	$ 18,741	18,528	$ 18,208	$ 18,210	$ 18,113
Net loans	1,569,338		1,435,783
Obligations of States and Political Subdivisions [Member]
Real estate loans:
Total Loans	48,044		40,416
Less allowance for loan losses	243	275	283	246	265	393
Home Equity Loans and Lines of Credit [Member]
Real estate loans:
Total Loans	43,623		43,170
Less allowance for loan losses	336	372	361	310	297	318
Auto Loans [Member]
Real estate loans:
Total Loans	1,499		3,611
Less allowance for loan losses	8	14	22	89	196	232
Other [Member]
Real estate loans:
Total Loans	2,356		1,716
Less allowance for loan losses	22	22	22	20	21	21
Residential [Member] | Real Estate Loans [Member]
Real estate loans:
Total Loans	671,357		623,375
Less allowance for loan losses	4,870	5,286	5,122	4,403	4,098	4,114
Construction [Member] | Real Estate Loans [Member]
Real estate loans:
Total Loans	27,572		25,024
Less allowance for loan losses	328	328	319	245	241	187
Commercial [Member] | Real Estate Loans [Member]
Real estate loans:
Total Loans	748,379		678,841
Less allowance for loan losses	11,016	11,194	10,754	10,550	10,607	10,470
Commercial Loans [Member]
Real estate loans:
Total Loans	44,823		38,158
Less allowance for loan losses	$ 1,185	$ 1,048	$ 698	$ 823	$ 1,224	$ 1,041

Loans Receivable, Net and All_4

Loans Receivable, Net and Allowance for Loan Losses - Schedule of Loans Evaluated for Impairment (Detail) - USD ($) $ in Thousands	Mar. 31, 2023	Sep. 30, 2022
Financing Receivable, Recorded Investment [Line Items]
Total Loans	$ 1,587,653	$ 1,454,311
Individually Evaluated for Impairment	10,247	14,502
Collectively Evaluated for Impairment	1,577,406	1,439,809
Obligations of States and Political Subdivisions [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Loans	48,044	40,416
Collectively Evaluated for Impairment	48,044	40,416
Home Equity Loans and Lines of Credit [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Loans	43,623	43,170
Individually Evaluated for Impairment	32	36
Collectively Evaluated for Impairment	43,591	43,134
Auto Loans [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Loans	1,499	3,611
Individually Evaluated for Impairment	2	16
Collectively Evaluated for Impairment	1,497	3,595
Other [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Loans	2,356	1,716
Individually Evaluated for Impairment	4	6
Collectively Evaluated for Impairment	2,352	1,710
Residential [Member] | Real Estate Loans [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Loans	671,357	623,375
Individually Evaluated for Impairment	1,217	1,342
Collectively Evaluated for Impairment	670,140	622,033
Construction [Member] | Real Estate Loans [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Loans	27,572	25,024
Collectively Evaluated for Impairment	27,572	25,024
Commercial [Member] | Real Estate Loans [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Loans	748,379	678,841
Individually Evaluated for Impairment	8,073	12,165
Collectively Evaluated for Impairment	740,306	666,676
Commercial Loans [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Loans	44,823	38,158
Individually Evaluated for Impairment	919	937
Collectively Evaluated for Impairment	$ 43,904	$ 37,221

Loans Receivable, Net and All_5

Loans Receivable, Net and Allowance for Loan Losses - Schedule of Investment and Unpaid Principal Balances for Impaired Loans (Detail) - USD ($)	3 Months Ended		6 Months Ended
	Mar. 31, 2023	Mar. 31, 2022	Mar. 31, 2023	Mar. 31, 2022	Dec. 31, 2022	Sep. 30, 2022
Financing Receivable, Impaired [Line Items]
Recorded Investment	$ 10,247,000		$ 10,247,000			$ 14,502,000
Unpaid Principal Balance	11,819,000		11,819,000			16,155,000
Associated Allowance	251,000		251,000		$ 251,000	351,000
Average Recorded Investment	12,924,000	$ 8,870,000	13,676,000	$ 11,983,000
Interest Income Recognized	2,000	3,000	3,000	5,000
With no Specific Allowance Recorded [Member]
Financing Receivable, Impaired [Line Items]
Recorded Investment	8,793,000		8,793,000			10,546,000
Unpaid Principal Balance	10,214,000		10,214,000			12,036,000
Average Recorded Investment	8,877,000	7,944,000	10,701,000	10,863,000
Interest Income Recognized	2,000	3,000	3,000	5,000
With an Allowance Recorded [Member]
Financing Receivable, Impaired [Line Items]
Recorded Investment	1,454,000		1,454,000			3,956,000
Unpaid Principal Balance	1,605,000		1,605,000			4,119,000
Associated Allowance	251,000		251,000			351,000
Average Recorded Investment	4,047,000	926,000	2,975,000	1,120,000
Home Equity Loans and Lines of Credit [Member]
Financing Receivable, Impaired [Line Items]
Recorded Investment	32,000		32,000			36,000
Unpaid Principal Balance	66,000		66,000			68,000
Average Recorded Investment	33,000	292,000	34,000	301,000
Home Equity Loans and Lines of Credit [Member] | With no Specific Allowance Recorded [Member]
Financing Receivable, Impaired [Line Items]
Recorded Investment	32,000		32,000			36,000
Unpaid Principal Balance	66,000		66,000			68,000
Average Recorded Investment	33,000	292,000	34,000	301,000
Auto Loans [Member]
Financing Receivable, Impaired [Line Items]
Recorded Investment	2,000		2,000			16,000
Unpaid Principal Balance	5,000		5,000			28,000
Average Recorded Investment	4,000	28,000	5,000	30,000
Auto Loans [Member] | With no Specific Allowance Recorded [Member]
Financing Receivable, Impaired [Line Items]
Recorded Investment	2,000		2,000			16,000
Unpaid Principal Balance	5,000		5,000			28,000
Average Recorded Investment	4,000	28,000	5,000	25,000
Auto Loans [Member] | With an Allowance Recorded [Member]
Financing Receivable, Impaired [Line Items]
Average Recorded Investment				5,000
Other [Member]
Financing Receivable, Impaired [Line Items]
Recorded Investment	4,000		4,000			6,000
Unpaid Principal Balance	18,000		18,000			19,000
Average Recorded Investment	5,000		5,000
Other [Member] | With no Specific Allowance Recorded [Member]
Financing Receivable, Impaired [Line Items]
Recorded Investment	4,000		4,000			6,000
Unpaid Principal Balance	18,000		18,000			19,000
Average Recorded Investment	5,000		5,000
Residential [Member] | Real Estate Loans [Member]
Financing Receivable, Impaired [Line Items]
Recorded Investment	1,217,000		1,217,000			1,342,000
Unpaid Principal Balance	1,827,000		1,827,000			2,137,000
Associated Allowance	10,000		10,000			12,000
Average Recorded Investment	1,258,000	1,210,000	1,288,000	1,810,000
Interest Income Recognized	1,000		2,000	2,000
Residential [Member] | Real Estate Loans [Member] | With no Specific Allowance Recorded [Member]
Financing Receivable, Impaired [Line Items]
Recorded Investment	1,116,000		1,116,000			1,239,000
Unpaid Principal Balance	1,722,000		1,722,000			2,029,000
Average Recorded Investment	1,156,000	1,103,000	1,186,000	1,698,000
Interest Income Recognized	1,000		2,000	2,000
Residential [Member] | Real Estate Loans [Member] | With an Allowance Recorded [Member]
Financing Receivable, Impaired [Line Items]
Recorded Investment	101,000		101,000			103,000
Unpaid Principal Balance	105,000		105,000			108,000
Associated Allowance	10,000		10,000			12,000
Average Recorded Investment	102,000	107,000	102,000	112,000
Commercial [Member] | Real Estate Loans [Member]
Financing Receivable, Impaired [Line Items]
Recorded Investment	8,073,000		8,073,000			12,165,000
Unpaid Principal Balance	8,929,000		8,929,000			12,915,000
Associated Allowance	5,000		5,000			301,000
Average Recorded Investment	7,310,000	6,444,000	11,418,000	8,767,000
Interest Income Recognized	1,000	3,000	1,000	3,000
Commercial [Member] | Real Estate Loans [Member] | With no Specific Allowance Recorded [Member]
Financing Receivable, Impaired [Line Items]
Recorded Investment	7,270,000		7,270,000			8,384,000
Unpaid Principal Balance	7,994,000		7,994,000			8,987,000
Average Recorded Investment	10,703,000	6,472,000	8,937,000	8,746,000
Interest Income Recognized	1,000	3,000	1,000	3,000
Commercial [Member] | Real Estate Loans [Member] | With an Allowance Recorded [Member]
Financing Receivable, Impaired [Line Items]
Recorded Investment	803,000		803,000			3,781,000
Unpaid Principal Balance	935,000		935,000			3,928,000
Associated Allowance	5,000		5,000			301,000
Average Recorded Investment	3,393,000	28,000	2,481,000	21,000
Commercial Loans [Member]
Financing Receivable, Impaired [Line Items]
Recorded Investment	919,000		919,000			937,000
Unpaid Principal Balance	974,000		974,000			988,000
Associated Allowance	236,000		236,000			38,000
Average Recorded Investment	921,000	868,000	926,000	1,075,000
Commercial Loans [Member] | With no Specific Allowance Recorded [Member]
Financing Receivable, Impaired [Line Items]
Recorded Investment	369,000		369,000			865,000
Unpaid Principal Balance	409,000		409,000			905,000
Average Recorded Investment	369,000	77,000	534,000	93,000
Commercial Loans [Member] | With an Allowance Recorded [Member]
Financing Receivable, Impaired [Line Items]
Recorded Investment	550,000		550,000			72,000
Unpaid Principal Balance	565,000		565,000			83,000
Associated Allowance	236,000		236,000			$ 38,000
Average Recorded Investment	$ 552,000	$ 791,000	$ 392,000	$ 982,000

Loans Receivable, Net and All_6

Loans Receivable, Net and Allowance for Loan Losses - Additional Information (Detail)	3 Months Ended		6 Months Ended
	Mar. 31, 2023 USD ($) Contract	Mar. 31, 2022 Contract	Mar. 31, 2023 USD ($) Contract	Mar. 31, 2022 Contract
Receivables [Abstract]
Criteria in internal rating system			ten-point
Categories considered as not criticized			six
Days past due over which loans are considered as substandard			90 days
Minimum internal review amount	$ 750,000		$ 750,000
Minimum external review amount	1,000,000		1,000,000
Loans greater than 90 days past due and still accruing interest	$ 0		$ 0
Number of Contracts | Contract	0
Number of troubled debt restructurings, loan modified, defaulted within one year of modification | Contract	0	0	0	0

Loans Receivable, Net and All_7

Loans Receivable, Net and Allowance for Loan Losses - Classes of Loan Portfolio, Internal Risk Rating System (Detail) - USD ($) $ in Thousands	Mar. 31, 2023	Sep. 30, 2022
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loan, total	$ 1,569,338	$ 1,435,783
Commercial And Municipal Portfolio Segment
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loan, total	841,246	757,415
Commercial And Municipal Portfolio Segment | Commercial [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loan, total	748,379	678,841
Commercial And Municipal Portfolio Segment | Commercial Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loan, total	44,823	38,158
Commercial And Municipal Portfolio Segment | Obligations of States and Political Subdivisions [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loan, total	48,044	40,416
Commercial And Municipal Portfolio Segment | Pass [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loan, total	824,483	734,842
Commercial And Municipal Portfolio Segment | Pass [Member] | Commercial [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loan, total	734,312	659,104
Commercial And Municipal Portfolio Segment | Pass [Member] | Commercial Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loan, total	42,127	35,322
Commercial And Municipal Portfolio Segment | Pass [Member] | Obligations of States and Political Subdivisions [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loan, total	48,044	40,416
Commercial And Municipal Portfolio Segment | Special Mention [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loan, total	4,809	7,750
Commercial And Municipal Portfolio Segment | Special Mention [Member] | Commercial [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loan, total	3,270	6,060
Commercial And Municipal Portfolio Segment | Special Mention [Member] | Commercial Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loan, total	1,539	1,690
Commercial And Municipal Portfolio Segment | Substandard [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loan, total	11,954	14,823
Commercial And Municipal Portfolio Segment | Substandard [Member] | Commercial [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loan, total	10,797	13,677
Commercial And Municipal Portfolio Segment | Substandard [Member] | Commercial Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loan, total	$ 1,157	$ 1,146

Loans Receivable, Net and All_8

Loans Receivable, Net and Allowance for Loan Losses - Schedule of Performing or Non-Performing Loans (Detail) - USD ($) $ in Thousands	Mar. 31, 2023	Sep. 30, 2022
Financing Receivable, Recorded Investment [Line Items]
Total	$ 1,569,338	$ 1,435,783
Consumer Portfolio Segment [Member]
Financing Receivable, Recorded Investment [Line Items]
Total	746,407	696,896
Home Equity Loans and Lines of Credit [Member] | Consumer Portfolio Segment [Member]
Financing Receivable, Recorded Investment [Line Items]
Total	43,623	43,170
Auto Loans [Member] | Consumer Portfolio Segment [Member]
Financing Receivable, Recorded Investment [Line Items]
Total	1,499	3,611
Other [Member] | Consumer Portfolio Segment [Member]
Financing Receivable, Recorded Investment [Line Items]
Total	2,356	1,716
Performing [Member] | Consumer Portfolio Segment [Member]
Financing Receivable, Recorded Investment [Line Items]
Total	744,004	694,937
Performing [Member] | Home Equity Loans and Lines of Credit [Member] | Consumer Portfolio Segment [Member]
Financing Receivable, Recorded Investment [Line Items]
Total	43,518	42,832
Performing [Member] | Auto Loans [Member] | Consumer Portfolio Segment [Member]
Financing Receivable, Recorded Investment [Line Items]
Total	1,495	3,590
Performing [Member] | Other [Member] | Consumer Portfolio Segment [Member]
Financing Receivable, Recorded Investment [Line Items]
Total	2,321	1,710
Non-performing [Member] | Consumer Portfolio Segment [Member]
Financing Receivable, Recorded Investment [Line Items]
Total	2,403	1,959
Non-performing [Member] | Home Equity Loans and Lines of Credit [Member] | Consumer Portfolio Segment [Member]
Financing Receivable, Recorded Investment [Line Items]
Total	105	338
Non-performing [Member] | Auto Loans [Member] | Consumer Portfolio Segment [Member]
Financing Receivable, Recorded Investment [Line Items]
Total	4	21
Non-performing [Member] | Other [Member] | Consumer Portfolio Segment [Member]
Financing Receivable, Recorded Investment [Line Items]
Total	35	6
Residential [Member] | Real Estate Loans [Member] | Consumer Portfolio Segment [Member]
Financing Receivable, Recorded Investment [Line Items]
Total	671,357	623,375
Residential [Member] | Performing [Member] | Real Estate Loans [Member] | Consumer Portfolio Segment [Member]
Financing Receivable, Recorded Investment [Line Items]
Total	669,098	621,781
Residential [Member] | Non-performing [Member] | Real Estate Loans [Member] | Consumer Portfolio Segment [Member]
Financing Receivable, Recorded Investment [Line Items]
Total	2,259	1,594
Construction [Member] | Real Estate Loans [Member] | Consumer Portfolio Segment [Member]
Financing Receivable, Recorded Investment [Line Items]
Total	27,572	25,024
Construction [Member] | Performing [Member] | Real Estate Loans [Member] | Consumer Portfolio Segment [Member]
Financing Receivable, Recorded Investment [Line Items]
Total	$ 27,572	$ 25,024

Loans Receivable, Net and All_9

Loans Receivable, Net and Allowance for Loan Losses - Classes of Loan Portfolio Summarized by Aging Categories (Detail) - USD ($) $ in Thousands	Mar. 31, 2023	Sep. 30, 2022
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current, Accruing Loans	$ 1,574,339	$ 1,444,734
31-60 Days Past Due, Accruing Loans	3,433	7,111
61-90 Days Past Due, Accruing Loans	499	984
90+ Days Past Due	9,382	1,482
Total Past Due, Accruing Loans	13,314	9,577
Total Accruing Loans	1,587,653	1,454,311
Non-Accrual Loans	11,395	15,082
Obligations of States and Political Subdivisions [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current, Accruing Loans	48,044	40,416
Total Accruing Loans	48,044	40,416
Home Equity Loans and Lines of Credit [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current, Accruing Loans	43,469	42,842
31-60 Days Past Due, Accruing Loans	49	121
61-90 Days Past Due, Accruing Loans	32	144
90+ Days Past Due	73	63
Total Past Due, Accruing Loans	154	328
Total Accruing Loans	43,623	43,170
Non-Accrual Loans	105	338
Auto Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current, Accruing Loans	1,441	3,462
31-60 Days Past Due, Accruing Loans	57	134
61-90 Days Past Due, Accruing Loans		2
90+ Days Past Due	1	13
Total Past Due, Accruing Loans	58	149
Total Accruing Loans	1,499	3,611
Non-Accrual Loans	4	21
Other [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current, Accruing Loans	2,322	1,685
31-60 Days Past Due, Accruing Loans	4
61-90 Days Past Due, Accruing Loans		31
90+ Days Past Due	30
Total Past Due, Accruing Loans	34	31
Total Accruing Loans	2,356	1,716
Non-Accrual Loans	35	6
Residential [Member] | Real Estate Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current, Accruing Loans	668,133	621,270
31-60 Days Past Due, Accruing Loans	901	598
61-90 Days Past Due, Accruing Loans	398	367
90+ Days Past Due	1,925	1,140
Total Past Due, Accruing Loans	3,224	2,105
Total Accruing Loans	671,357	623,375
Non-Accrual Loans	2,259	1,594
Construction [Member] | Real Estate Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current, Accruing Loans	27,572	25,024
Total Accruing Loans	27,572	25,024
Commercial [Member] | Real Estate Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current, Accruing Loans	739,418	672,875
31-60 Days Past Due, Accruing Loans	2,405	5,719
61-90 Days Past Due, Accruing Loans	69
90+ Days Past Due	6,487	247
Total Past Due, Accruing Loans	8,961	5,966
Total Accruing Loans	748,379	678,841
Non-Accrual Loans	8,073	12,165
Commercial Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current, Accruing Loans	43,940	37,160
31-60 Days Past Due, Accruing Loans	17	539
61-90 Days Past Due, Accruing Loans		440
90+ Days Past Due	866	19
Total Past Due, Accruing Loans	883	998
Total Accruing Loans	44,823	38,158
Non-Accrual Loans	$ 919	$ 958

Loans Receivable, Net and Al_10

Loans Receivable, Net and Allowance for Loan Losses - Summary of Changes in Primary Segments of ALL (Detail) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Mar. 31, 2023	Mar. 31, 2022	Mar. 31, 2023	Mar. 31, 2022	Sep. 30, 2022
Financing Receivable, Allowance for Credit Losses [Line Items]
Balance, Beginning of period	$ 18,741	$ 18,210	$ 18,528	$ 18,113
Charge-offs	(599)	(39)	(620)	(51)
Recoveries	23	37	107	146
Provision	150		300
Balance, End of period	18,315	18,208	18,315	18,208
Individually evaluated for impairment	251		251		$ 351
Collectively evaluated for impairment	18,064		18,064		18,177
Commercial Loans [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Balance, Beginning of period	1,048	1,224	698	1,041
Provision	137	(401)	487	(218)
Balance, End of period	1,185	823	1,185	823
Individually evaluated for impairment	236		236		38
Collectively evaluated for impairment	949		949		660
Unallocated [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Balance, Beginning of period	202	1,261	947	1,337
Provision	105	261	(640)	185
Balance, End of period	307	1,522	307	1,522
Collectively evaluated for impairment	307		307		947
Real Estate Loans [Member] | Residential [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Balance, Beginning of period	5,286	4,098	5,122	4,114
Charge-offs		5		10
Recoveries			2	72
Provision	(416)	310	(254)	227
Balance, End of period	4,870	4,403	4,870	4,403
Individually evaluated for impairment	10		10		12
Collectively evaluated for impairment	4,860		4,860		5,110
Real Estate Loans [Member] | Construction [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Balance, Beginning of period	328	241	319	187
Provision		4	9	58
Balance, End of period	328	245	328	245
Collectively evaluated for impairment	328		328		319
Real Estate Loans [Member] | Commercial [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Balance, Beginning of period	11,194	10,607	10,754	10,470
Charge-offs	(593)	(19)	(593)	19
Recoveries		6	1	7
Provision	415	(44)	854	92
Balance, End of period	11,016	10,550	11,016	10,550
Individually evaluated for impairment	5		5		301
Collectively evaluated for impairment	11,011		11,011		10,453
Obligations of States and Political Subdivisions [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Balance, Beginning of period	275	265	283	393
Provision	(32)	(19)	(40)	(147)
Balance, End of period	243	246	243	246
Collectively evaluated for impairment	243		243		283
Home Equity Loans and Lines of Credit [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Balance, Beginning of period	372	297	361	318
Recoveries	1	2	52	3
Provision	(37)	11	(77)	(11)
Balance, End of period	336	310	336	310
Collectively evaluated for impairment	336		336		361
Auto Loans [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Balance, Beginning of period	14	196	22	232
Charge-offs	(6)	(15)	(27)	(22)
Recoveries	22	29	52	64
Provision	(22)	(121)	(39)	(185)
Balance, End of period	8	89	8	89
Collectively evaluated for impairment	8		8		22
Other [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Balance, Beginning of period	22	21	22	21
Provision		(1)		(1)
Balance, End of period	22	$ 20	22	$ 20
Collectively evaluated for impairment	$ 22		$ 22		$ 22

Loans Receivable, Net and Al_11

Loans Receivable, Net and Allowance for Loan Losses - Summary of Troubled Debt Restructurings Granted (Detail) $ in Thousands	3 Months Ended		6 Months Ended
	Mar. 31, 2023 Contract	Mar. 31, 2022 USD ($) Contract	Mar. 31, 2023 USD ($) Contract	Mar. 31, 2022 USD ($) Contract
Financing Receivable, Modifications [Line Items]
Number of Contracts | Contract	0
Real Estate Loans [Member] | Residential [Member]
Financing Receivable, Modifications [Line Items]
Number of Contracts | Contract		2	1	2
Pre-Modification Outstanding Recorded Investment		$ 88	$ 51	$ 88
Post-Modification Outstanding Recorded Investment		$ 88	$ 54	$ 88
Troubled Debt Restructurings [Member]
Financing Receivable, Modifications [Line Items]
Number of Contracts | Contract		2	1	2
Pre-Modification Outstanding Recorded Investment		$ 88	$ 51	$ 88
Post-Modification Outstanding Recorded Investment		$ 88	$ 54	$ 88

Deposits - Schedule of Deposits

Deposits - Schedule of Deposits by Major Classifications (Detail) - USD ($) $ in Thousands	Mar. 31, 2023	Sep. 30, 2022
Deposits Liabilities Disclosures [Abstract]
Non-interest bearing demand accounts	$ 274,274	$ 290,061
Interest bearing demand accounts	295,212	357,516
Money market accounts	354,371	402,080
Savings and club accounts	176,402	196,696
Certificates of deposit	329,038	133,668
Total	$ 1,429,297	$ 1,380,021

Net Periodic Benefit Cost-Def_3

Net Periodic Benefit Cost-Defined Benefit Plan - Summary of the Components of Net Periodic Benefit Cost (Income) (Detail) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Mar. 31, 2023	Mar. 31, 2022	Mar. 31, 2023	Mar. 31, 2022
Compensation Related Costs [Abstract]
Interest Cost	$ 164	$ 131	$ 328	$ 256
Expected return on plan assets	(242)	(339)	(484)	(672)
Partial settlement		83		221
Amortization of net loss from earlier periods		1		2
Net periodic benefit income	$ (78)	$ (124)	$ (156)	$ (193)

Equity Incentive Plan - Additio

Equity Incentive Plan - Additional Information (Detail) - USD ($)		3 Months Ended		6 Months Ended
	Mar. 02, 2016	Mar. 31, 2023	Mar. 31, 2022	Mar. 31, 2023	Mar. 31, 2022
Compensation Related Costs Disclosure [Line Items]
Share-based compensation expense				$ 386,000	$ 355,000
2007 Equity Incentive Plan [Member]
Compensation Related Costs Disclosure [Line Items]
Common stock issuance, Grant	2,377,326
Further number of shares, grants	0
2016 Plan [Member]
Compensation Related Costs Disclosure [Line Items]
Common stock issuance, Grant		250,000		250,000
Stock Option [Member]
Compensation Related Costs Disclosure [Line Items]
Number of available shares	1,698,090
Restricted Stock [Member]
Compensation Related Costs Disclosure [Line Items]
Number of available shares	679,236
Share-based compensation expense		$ 91,000	$ 93,000	$ 386,000	$ 355,000
Expected future expense		$ 737,000
Remaining vesting periods		3 years 9 months
Restricted Stock [Member] | Minimum [Member]
Compensation Related Costs Disclosure [Line Items]
Restricted shares vesting period				1 month
Restricted Stock [Member] | Maximum [Member]
Compensation Related Costs Disclosure [Line Items]
Restricted shares vesting period				42 months

Equity Incentive Plan - Schedul

Equity Incentive Plan - Schedule of Restricted Stock Option Activity (Detail) - Restricted Stock [Member]	6 Months Ended
	Mar. 31, 2023 $ / shares shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of Restricted Stock, Nonvested at September 30, 2022 | shares	35,639
Number of Restricted Stock, Granted | shares	31,696
Number of Restricted Stock, Vested | shares	(11,441)
Number of Restricted Stock, Nonvested at March 31, 2023 | shares	55,894
Weighted-average Grant Date Fair Value, Nonvested at September 30, 2022 | $ / shares	$ 14.88
Weighted-average Grant Date Fair Value, Granted | $ / shares	19.06
Weighted-average Grant Date Fair Value, Vested | $ / shares	18.33
Weighted-average Grant Date Fair Value, Nonvested at March 31, 2023 | $ / shares	$ 17.06

Fair Value - Schedule of Fair V

Fair Value - Schedule of Fair Value For Assets and Liabilities Required to be Measured and Reported at Fair Value on a Recurring Basis (Detail) - USD ($) $ in Thousands	Mar. 31, 2023	Sep. 30, 2022
Assets
Total debt securities	$ 203,290	$ 208,647
Fair Value, Measurements, Recurring [Member]
Assets
Total debt securities	203,290	208,647
Equity securities- financial services	32	36
Derivatives and hedging activities	18,284	24,481
Liabilities
Derivatives and hedging activities	6,913	9,176
Fair Value, Measurements, Recurring [Member] | Mortgage-Backed Securities [Member]
Assets
Total debt securities	106,381	110,160
Fair Value, Measurements, Recurring [Member] | Obligations of States and Political Subdivisions [Member]
Assets
Total debt securities	10,168	9,920
Fair Value, Measurements, Recurring [Member] | U.S. Government Agency Securities [Member]
Assets
Total debt securities	9,373	9,330
Fair Value, Measurements, Recurring [Member] | Corporate Obligations [Member]
Assets
Total debt securities	70,058	71,119
Fair Value, Measurements, Recurring [Member] | Other Debt Securities [Member]
Assets
Total debt securities	7,310	8,118
Fair Value, Measurements, Recurring [Member] | Level I [Member]
Assets
Equity securities- financial services	32	36
Fair Value, Measurements, Recurring [Member] | Level II [Member]
Assets
Total debt securities	199,861	201,273
Derivatives and hedging activities	18,284	24,481
Liabilities
Derivatives and hedging activities	6,913	9,176
Fair Value, Measurements, Recurring [Member] | Level II [Member] | Mortgage-Backed Securities [Member]
Assets
Total debt securities	106,381	110,160
Fair Value, Measurements, Recurring [Member] | Level II [Member] | Obligations of States and Political Subdivisions [Member]
Assets
Total debt securities	10,168	9,920
Fair Value, Measurements, Recurring [Member] | Level II [Member] | U.S. Government Agency Securities [Member]
Assets
Total debt securities	9,373	9,330
Fair Value, Measurements, Recurring [Member] | Level II [Member] | Corporate Obligations [Member]
Assets
Total debt securities	66,629	63,745
Fair Value, Measurements, Recurring [Member] | Level II [Member] | Other Debt Securities [Member]
Assets
Total debt securities	7,310	8,118
Fair Value, Measurements, Recurring [Member] | Level III [Member]
Assets
Total debt securities	3,429	7,374
Fair Value, Measurements, Recurring [Member] | Level III [Member] | Corporate Obligations [Member]
Assets
Total debt securities	$ 3,429	$ 7,374

Fair Value - Schedule of Change

Fair Value - Schedule of Changes in Fair Value of Level III Investments (Detail) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Mar. 31, 2023	Mar. 31, 2022	Mar. 31, 2023	Mar. 31, 2022
Fair Value Disclosures [Abstract]
Beginning balance	$ 7,199	$ 10,937	$ 7,374	$ 11,112
Purchases, sales, issuances, settlements, net		(500)		(500)
Total unrealized (loss) gain:
Included in other comprehensive (loss) income	$ (253)	$ (175)	$ (428)	$ (350)
Fair Value, Asset, Recurring Basis, Unobservable Input Reconciliation, Asset, Gain (Loss), Statement of Other Comprehensive Income or Comprehensive Income [Extensible Enumeration]	Gain on sale of loans, net	Gain on sale of loans, net	Gain on sale of loans, net	Gain on sale of loans, net
Transfers in and/or out of Level III	$ (3,517)	$ 500	$ (3,517)	$ 500
Ending balance	$ 3,429	$ 10,762	$ 3,429	$ 10,762

Fair Value - Schedule of Fair_2

Fair Value - Schedule of Fair Value For Assets Required to be Measured and Reported at Fair Value on a Nonrecurring Basis (Detail) - USD ($) $ in Thousands	Mar. 31, 2023	Sep. 30, 2022
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Foreclosed real estate	$ 3,546	$ 29
Fair Value, Measurements, Nonrecurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Foreclosed real estate	3,546	29
Impaired loans	9,996	14,151
Level III [Member] | Fair Value, Measurements, Nonrecurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Foreclosed real estate	3,546	29
Impaired loans	$ 9,996	$ 14,151

Fair Value - Summary of Additio

Fair Value - Summary of Additional Quantitative Information about Assets Measured at Fair Value on Nonrecurring Basis (Detail) - Fair Value, Measurements, Nonrecurring [Member] - Level III [Member] $ in Thousands	Mar. 31, 2023 USD ($)	Sep. 30, 2022 USD ($)
Impaired Loans [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair Value Estimate	$ 9,996	$ 14,151
Servicing Asset Valuation Technique [Extensible Enumeration]	us-gaap:MarketApproachValuationTechniqueMember	us-gaap:MarketApproachValuationTechniqueMember
Servicing Asset, Measurement Input [Extensible Enumeration]	us-gaap:MeasurementInputAppraisedValueMember	us-gaap:MeasurementInputAppraisedValueMember
Fair value input appraisal adjustments	0.208	0.206
Impaired Loans [Member] | Minimum [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair value input appraisal adjustments	0	0
Impaired Loans [Member] | Maximum [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair value input appraisal adjustments	0.35	0.35
Foreclosed Real Estate Owned [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair Value Estimate	$ 3,546	$ 29
Servicing Asset Valuation Technique [Extensible Enumeration]	us-gaap:MarketApproachValuationTechniqueMember	us-gaap:MarketApproachValuationTechniqueMember
Servicing Asset, Measurement Input [Extensible Enumeration]	us-gaap:MeasurementInputAppraisedValueMember	us-gaap:MeasurementInputAppraisedValueMember
Fair value input appraisal adjustments	0.201	0.20
Foreclosed Real Estate Owned [Member] | Minimum [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair value input appraisal adjustments	0.20	0.200
Foreclosed Real Estate Owned [Member] | Maximum [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair value input appraisal adjustments	0.35

Fair Value - Additional Informa

Fair Value - Additional Information (Detail)	Mar. 31, 2023 USD ($)	Dec. 31, 2022 USD ($) Loan	Sep. 30, 2022 USD ($) Loan
Fair Value Disclosures [Abstract]
Number of impaired loans | Loan		8	49
Impaired loans, carrying value		$ 10,200,000	$ 14,500,000
Impaired loans, valuation allowance	$ 251,000	251,000	351,000
Impaired loans, net fair value		$ 10,000,000	$ 14,200,000

Fair Value - Schedule of Carryi

Fair Value - Schedule of Carrying Value and Fair Value for Certain Financial Instruments not Required to be Measured and Reported at Fair Value (Detail) - USD ($) $ in Thousands	Mar. 31, 2023	Dec. 31, 2022	Sep. 30, 2022
Financial assets:
Loans receivable, net		$ 10,000	$ 14,200
Carrying Value [Member]
Financial assets:
Investment securities held to maturity	$ 54,904		57,285
Loans receivable, net	1,569,338		1,435,783
Mortgage servicing rights	798		788
Financial liabilities:
Deposits	1,429,297		1,380,021
Short term borrowings	301,478		230,810
Short term borrowings	301,478		230,810
Estimated Fair Value [Member]
Financial assets:
Investment securities held to maturity	46,835		47,546
Loans receivable, net	1,464,066		1,351,823
Mortgage servicing rights	1,306		1,390
Financial liabilities:
Deposits	1,347,521		1,374,886
Short term borrowings	289,842		215,287
Short term borrowings	289,842		215,287
Estimated Fair Value [Member] | Level 1 [Member]
Financial liabilities:
Deposits	1,100,259		1,246,353
Estimated Fair Value [Member] | Level II [Member]
Financial assets:
Investment securities held to maturity	46,835		47,546
Estimated Fair Value [Member] | Level 3 [Member]
Financial assets:
Loans receivable, net	1,464,066		1,351,823
Mortgage servicing rights	1,306		1,390
Financial liabilities:
Deposits	247,262		128,533
Short term borrowings	289,842		215,287
Short term borrowings	$ 289,842		$ 215,287

Accumulated Other Comprehensi_3

Accumulated Other Comprehensive Income (Loss) - Summary of Activity in Accumulated Other Comprehensive Income (Loss) (Detail) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Mar. 31, 2023	Mar. 31, 2022	Mar. 31, 2023	Mar. 31, 2022
Accumulated Other Comprehensive Income Loss [Line Items]
Beginning Balance	$ 216,178	$ 207,619	$ 212,337	$ 201,822
Ending Balance	218,799	212,713	218,799	212,713
Defined Benefit Pension Plan [Member]
Accumulated Other Comprehensive Income Loss [Line Items]
Beginning Balance	(1,108)	(1,034)	(1,108)	(1,907)
Other comprehensive (loss) income before reclassifications		(54)		710
Amounts reclassified from accumulated other comprehensive income (loss)		66		175
Total other comprehensive income (loss)		12		885
Ending Balance	(1,108)	(1,022)	(1,108)	(1,022)
Unrealized Gains (Losses) on Securities Available for Sale [Member]
Accumulated Other Comprehensive Income Loss [Line Items]
Beginning Balance	(13,041)	1,119	(13,879)	1,962
Other comprehensive (loss) income before reclassifications	1,277	(4,153)	2,115	(4,996)
Total other comprehensive income (loss)	1,277	(4,153)	2,115	(4,996)
Ending Balance	(11,764)	(3,034)	(11,764)	(3,034)
Derivatives [Member]
Accumulated Other Comprehensive Income Loss [Line Items]
Beginning Balance	11,172	2,504	12,093	627
Other comprehensive (loss) income before reclassifications	(374)	5,392	153	7,082
Amounts reclassified from accumulated other comprehensive income (loss)	(1,810)	131	(3,258)	318
Total other comprehensive income (loss)	(2,184)	5,523	(3,105)	7,400
Ending Balance	8,988	8,027	8,988	8,027
Accumulated Other Comprehensive (Loss) Income [Member]
Accumulated Other Comprehensive Income Loss [Line Items]
Beginning Balance	(2,977)	2,589	(2,894)	682
Other comprehensive (loss) income before reclassifications	903	1,185	2,268	2,796
Amounts reclassified from accumulated other comprehensive income (loss)	(1,810)	197	(3,258)	493
Total other comprehensive income (loss)	(907)	1,382	(990)	3,289
Ending Balance	$ (3,884)	$ 3,971	$ (3,884)	$ 3,971

Accumulated Other Comprehensi_4

Accumulated Other Comprehensive Income (Loss) - Summary of Reclassification Out of Accumulated Other Comprehensive Income (Loss) (Detail) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Mar. 31, 2023	Mar. 31, 2022	Mar. 31, 2023	Mar. 31, 2022
Schedule Of Available For Sale Securities [Line Items]
Interest expense	$ (4,944)	$ (693)	$ (7,903)	$ (1,539)
Income taxes	(1,052)	(1,177)	(2,177)	(2,150)
NET INCOME	4,685	4,592	9,551	9,205
Reclassification Out of Accumulated Other Comprehensive Income (Loss) [Member]
Schedule Of Available For Sale Securities [Line Items]
NET INCOME	1,810	(197)	3,258	(493)
Reclassification Out of Accumulated Other Comprehensive Income (Loss) [Member] | Defined Benefit Pension Plan [Member]
Schedule Of Available For Sale Securities [Line Items]
Compensation and employee benefits		(84)		(223)
Income taxes		18		48
NET INCOME		(66)		(175)
Reclassification Out of Accumulated Other Comprehensive Income (Loss) [Member] | Derivatives [Member]
Schedule Of Available For Sale Securities [Line Items]
Interest expense	2,293	(166)	4,127	(402)
Income taxes	(483)	35	(869)	84
NET INCOME	$ 1,810	$ (131)	$ 3,258	$ (318)

Derivatives and Hedging Activ_2

Derivatives and Hedging Activities - Schedule of Fair Value of Derivative Financial Instruments as well as their Classification on Consolidated Balance Sheet (Detail) - Designated as Hedging Instrument [Member] - USD ($)	Mar. 31, 2023	Sep. 30, 2022
Derivatives Fair Value [Line Items]
Derivatives Assets, Notional Amount	$ 298,149,000	$ 304,602,000
Fair Values of Derivative Instruments, Asset	18,284,000	24,481,000
Derivatives Liability, Notional Amount	114,808,000	111,668,000
Fair Values of Derivative Instruments, Liability	6,913,000	9,176,000
Federal Home Loan Bank Advances
Derivatives Fair Value [Line Items]
Derivatives Assets, Notional Amount	215,000,000	225,000,000
Fair Values of Derivative Instruments, Asset	11,379,000	15,310,000
Commercial Loans [Member]
Derivatives Fair Value [Line Items]
Derivatives Assets, Notional Amount	83,149,000	79,602,000
Fair Values of Derivative Instruments, Asset	6,905,000	9,171,000
Derivatives Liability, Notional Amount	114,808,000	111,668,000
Fair Values of Derivative Instruments, Liability	$ 6,913,000	$ 9,176,000

Derivatives and Hedging Activ_3

Derivatives and Hedging Activities - Additional Information (Detail) - USD ($)	3 Months Ended		6 Months Ended
	Mar. 31, 2023	Mar. 31, 2022	Mar. 31, 2023	Mar. 31, 2022	Dec. 31, 2022	Sep. 30, 2022
Derivative Instruments And Hedging Activities Disclosures [Line Items]
Derivative liability, collateral against obligations	$ 0		$ 0			$ 0
Designated as Hedging Instrument [Member] | Cash Flow Hedges of Interest Rate Risk [Member]
Derivative Instruments And Hedging Activities Disclosures [Line Items]
Interest expense	2,293,000	$ (166,000)	4,127,000	$ (402,000)
Designated as Hedging Instrument [Member] | Cash Flow Hedges of Interest Rate Risk [Member] | Reclassification Out of Accumulated Other Comprehensive Income (Loss) [Member]
Derivative Instruments And Hedging Activities Disclosures [Line Items]
Interest expense	2,300,000	$ (166,000)	4,100,000	$ (402,000)
Increase (decrease) in accrued interest payable					$ 7,800,000
Designated as Hedging Instrument [Member] | Cash Flow Hedges of Interest Rate Risk [Member] | Interest Rate Swaps [Member] | Brokered Certificates [Member] | Variable Rate [Member]
Derivative Instruments And Hedging Activities Disclosures [Line Items]
Derivative, notional principal amount	215,000,000		215,000,000
Designated as Hedging Instrument [Member] | Cash Flow Hedges of Interest Rate Risk [Member] | Interest Rate Swaps [Member] | Commercial Loans [Member] | Variable Rate [Member]
Derivative Instruments And Hedging Activities Disclosures [Line Items]
Derivative, notional principal amount	$ 198,000,000		$ 198,000,000

Derivatives and Hedging Activ_4

Derivatives and Hedging Activities - Schedule of Effect of Cash Flow Hedge Accounting on Accumulated Other Comprehensive Income (Loss) (Detail) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Mar. 31, 2023	Mar. 31, 2022	Mar. 31, 2023	Mar. 31, 2022
Derivative Instruments Gain Loss [Line Items]
Gain (Loss) Recognized in OCI on Derivative	$ (475)	$ 6,826	$ 193	$ 8,965
Designated as Hedging Instrument [Member] | Cash Flow Hedges of Interest Rate Risk [Member]
Derivative Instruments Gain Loss [Line Items]
Gain (Loss) Recognized in OCI on Derivative	(2,768)	6,992	(3,934)	5,546
Gain (Loss) Reclassified from Accumulated OCI into Income	$ 2,293	$ (166)	$ 4,127	$ (402)
Derivative Instrument, Gain (Loss) Reclassified from AOCI into Income, Effective Portion, Statement of Income or Comprehensive Income [Extensible Enumeration]	Interest Expense	Interest Expense	Interest Expense	Interest Expense
Designated as Hedging Instrument [Member] | Interest Rate Products [Member] | Cash Flow Hedges of Interest Rate Risk [Member]
Derivative Instruments Gain Loss [Line Items]
Gain (Loss) Recognized in OCI on Derivative	$ (2,768)	$ 6,992	$ (3,934)	$ 5,546
Gain (Loss) Reclassified from Accumulated OCI into Income	$ 2,293	$ (166)	$ 4,127	$ (402)

Contingent Liabilities - Additi

Contingent Liabilities - Additional Information (Detail) - Plaintiff	May 29, 2020	Dec. 09, 2019	Dec. 08, 2016
Commitments And Contingencies Disclosure [Abstract]
Number of plaintiffs	3		1
Additional number of plaintiffs		2

Leases - Additional Information

Leases - Additional Information (Detail)	6 Months Ended
	Mar. 31, 2023
Leases [Abstract]
Lessee operating lease expiration year	2044

Leases - Summary of Balance She

Leases - Summary of Balance Sheet Operating Lease Right-of-Use Assets and Lease Liabilities (Detail) - USD ($) $ in Thousands	Mar. 31, 2023	Sep. 30, 2022
ASSETS
Operating lease right-of-use assets	$ 5,639	$ 6,075
Operating Lease Right Of Use Asset Statement Of Financial Position Extensible List	Other assets	Other assets
LIABILITIES
Operating lease Liabilities	$ 5,861	$ 6,275
Operating Lease Liability Statement Of Financial Position Extensible List	Other liabilities	Other liabilities

Leases - Summary of Lease Term

Leases - Summary of Lease Term and Discount Rate (Detail)	Mar. 31, 2023
Weighted average remaining lease term
Operating leases	12 years 2 months 12 days
Weighted average discount rate
Operating leases	2.40%

Leases - Summary of Components

Leases - Summary of Components of Lease Cost (Detail) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Mar. 31, 2023	Mar. 31, 2022	Mar. 31, 2023	Mar. 31, 2022
Lease Cost [Abstract]
Operating lease cost	$ 238	$ 240	$ 476	$ 501
Variable lease cost	62	101	113	180
Net lease cost	$ 300	$ 341	$ 589	$ 681

Leases - Summary of Future Mini

Leases - Summary of Future Minimum Lease Payments (Detail) - USD ($) $ in Thousands	Mar. 31, 2023	Sep. 30, 2022
Lease Cost [Abstract]
March 31, 2024	$ 783
March 31, 2025	651
March 31, 2026	647
March 31, 2027	529
March 31, 2028	462
Thereafter	3,824
Total future minimum lease payments	6,896
Amounts representing interest	1,035
Present Value of Net Future Minimum Lease Payments	$ 5,861	$ 6,275