ESSA Bancorp (ESSA) 10-Q 5 Aug 21 2021 Q3 Quarterly report Financial data

Document and Entity Information

Document and Entity Information - shares	9 Months Ended
	Jun. 30, 2021	Jul. 29, 2021
Cover [Abstract]
Document Type	10-Q
Amendment Flag	false
Document Period End Date	Jun. 30, 2021
Document Fiscal Year Focus	2021
Document Fiscal Period Focus	Q3
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		10,492,782
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	Jun. 30, 2021	Sep. 30, 2020
ASSETS
Cash and due from banks	$ 170,623	$ 101,447
Interest-bearing deposits with other institutions	14,777	54,470
Total cash and cash equivalents	185,400	155,917
Investment securities available for sale, at fair value	148,170	212,484
Investment securities held to maturity, at amortized cost	17,982
Loans held for sale	1,581	208
Loans receivable (net of allowance for loan losses of $17,693 and $15,400)	1,368,616	1,417,974
Regulatory stock, at cost	4,140	7,344
Premises and equipment, net	13,996	14,230
Bank-owned life insurance	37,286	40,546
Foreclosed real estate	373	269
Intangible assets, net	587	791
Goodwill	13,801	13,801
Deferred income taxes	3,873	5,993
Other assets	26,404	23,958
TOTAL ASSETS	1,822,209	1,893,515
LIABILITIES
Deposits	1,590,072	1,543,696
Short-term borrowings		111,713
Other borrowings		14,164
Advances by borrowers for taxes and insurance	14,902	7,858
Other liabilities	17,983	24,687
TOTAL LIABILITIES	1,622,957	1,702,118
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; 10,570,536 and 10,876,869 outstanding at June 30, 2021 and September 30, 2020, respectively)	181	181
Additional paid in capital	181,500	181,487
Unallocated common stock held by the Employee Stock Ownership Plan (ESOP)	(7,019)	(7,350)
Retained earnings	121,603	112,612
Treasury stock, at cost; 7,562,559 and 7,256,226 shares outstanding at June 30, 2021 and September 30, 2020, respectively	(96,376)	(91,477)
Accumulated other comprehensive loss	(637)	(4,056)
TOTAL STOCKHOLDERS’ EQUITY	199,252	191,397
TOTAL LIABILITIES AND STOCKHOLDERS’ EQUITY	$ 1,822,209	$ 1,893,515

Consolidated Balance Sheet (U_2

Consolidated Balance Sheet (Unaudited) (Parenthetical) - USD ($) $ in Thousands	Jun. 30, 2021	Sep. 30, 2020
Statement Of Financial Position [Abstract]
Allowance for loan losses	$ 17,693	$ 15,400
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	10,570,536	10,876,869
Treasury stock, shares outstanding	7,562,559	7,256,226

Consolidated Statement of Opera

Consolidated Statement of Operations (Unaudited) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
INTEREST INCOME
Loans receivable, including fees	$ 13,378	$ 13,763	$ 40,808	$ 41,958
Investment securities:
Taxable	894	1,768	2,773	5,670
Exempt from federal income tax	40	45	121	141
Other investment income	91	277	276	941
Total interest income	14,403	15,853	43,978	48,710
INTEREST EXPENSE
Deposits	1,251	2,211	4,612	8,772
Short-term borrowings		588	209	1,582
Other borrowings		854	62	2,598
Total interest expense	1,251	3,653	4,883	12,952
NET INTEREST INCOME	13,152	12,200	39,095	35,758
Provision for loan losses	600	1,300	2,400	2,175
NET INTEREST INCOME AFTER PROVISION FOR LOAN LOSSES	12,552	10,900	36,695	33,583
NONINTEREST INCOME
Service fees on deposit accounts	781	558	2,305	2,163
Services charges and fees on loans	450	325	1,367	985
Loan swap fees	1	627	622	1,200
Realized and unrealized gain (loss) on equity securities, net	4	2	15	(3)
Trust and investment fees	398	298	1,074	1,045
Gain on sale of investment securities available for sale, net	42		459	381
Gain on sale of loans, net	250	647	1,737	791
Earnings on Bank-owned life insurance	191	233	725	709
Insurance commissions	158	195	492	641
Other	18	(2)	147	102
Total noninterest income	2,293	2,883	8,943	8,014
NONINTEREST EXPENSE
Compensation and employee benefits	6,315	5,714	19,083	18,029
Occupancy and equipment	1,060	1,033	3,257	3,169
Professional fees	526	457	1,583	1,449
Data processing	1,169	1,113	3,390	3,215
Advertising	218	114	471	348
Federal Deposit Insurance Corporation (FDIC) premiums	280	154	834	492
(Gain) loss on foreclosed real estate	(534)	(5)	(639)	61
Amortization of intangible assets	69	68	204	208
Other	915	482	2,448	1,746
Total noninterest expense	10,018	9,130	30,631	28,717
Income before income taxes	4,827	4,653	15,007	12,880
Income taxes	801	876	2,506	2,286
NET INCOME	$ 4,026	$ 3,777	$ 12,501	$ 10,594
Earnings per share
Basic	$ 0.41	$ 0.37	$ 1.25	$ 1.02
Diluted	0.41	0.37	1.25	1.02
Dividends per share	$ 0.12	$ 0.11	$ 0.35	$ 0.33

Consolidated Statement of Compr

Consolidated Statement of Comprehensive Income (Unaudited) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
Statement Of Income And Comprehensive Income [Abstract]
Net income	$ 4,026	$ 3,777	$ 12,501	$ 10,594
Investment securities available for sale:
Unrealized holding gains (losses)	429	1,091	(440)	6,763
Tax effect	(90)	(228)	95	(1,419)
Reclassification of gains recognized in net income	(42)		(459)	(381)
Tax effect	8		96	80
Net of tax amount	305	863	(708)	5,043
Pension plan:
Reclassification of gains recognized in net income	(56)		(166)
Tax effect	12		35
Net of tax amount	(44)		(131)
Derivative and hedging activities adjustments:
Changes in unrealized holding (losses) gains on derivatives included in net income	(590)	(2,353)	3,645	(4,705)
Tax effect	127	494	(766)	988
Reclassification adjustment for losses on derivatives included in net income	434	108	1,745	50
Tax effect	(91)	(23)	(366)	(11)
Net of tax amount	(120)	(1,774)	4,258	(3,678)
Total other comprehensive income (loss)	141	(911)	3,419	1,365
Comprehensive income	$ 4,167	$ 2,866	$ 15,920	$ 11,959

Consolidated Statement of Chang

Consolidated Statement of Changes in Stockholders' Equity (Unaudited) - USD ($) $ in Thousands	Total	Cumulative Effect, Period of Adoption, Adjustment [Member]	Common Stock [Member]	Additional Paid-In Capital [Member]	Unallocated Common Stock Held by the ESOP [Member]	Retained Earnings [Member]	Retained Earnings [Member]Cumulative Effect, Period of Adoption, Adjustment [Member]	Treasury Stock [Member]	Accumulated Other Comprehensive (Loss) Income [Member]
Beginning Balance at Sep. 30, 2019	$ 189,508	$ 290	$ 181	$ 181,161	$ (7,803)	$ 102,465	$ 290	$ (85,216)	$ (1,280)
Beginning Balance, Shares at Sep. 30, 2019			11,321,417
Net income	10,594					10,594
Other comprehensive income (loss)	1,365								1,365
Cash dividends declared	$ (3,437)					(3,437)
Accounting Standards Update [Extensible List]	ASU No. 2016-02
Stock based compensation	$ 415			415
Allocation of ESOP stock	519			179	340
Allocation of treasury shares to incentive plan	(4)			(389)				385
Allocation of treasury shares to incentive plan, Shares			30,692
Purchase of common stock	(5,565)							(5,565)
Purchase of common stock, Shares			(391,752)
Ending Balance at Jun. 30, 2020	193,685		$ 181	181,366	(7,463)	109,912		(90,396)	85
Ending Balance, Shares at Jun. 30, 2020			10,960,357
Beginning Balance at Mar. 31, 2020	193,666		$ 181	181,218	(7,576)	107,265		(88,418)	996
Beginning Balance, Shares at Mar. 31, 2020			11,105,887
Net income	3,777					3,777
Other comprehensive income (loss)	(911)								(911)
Cash dividends declared	(1,130)					(1,130)
Stock based compensation	82			82
Allocation of ESOP stock	148			35	113
Allocation of forfeited incentive shares				31				(31)
Allocation of forfeited incentive shares, Shares			(2,442)
Purchase of common stock	(1,947)							(1,947)
Purchase of common stock, Shares			(143,088)
Ending Balance at Jun. 30, 2020	193,685		$ 181	181,366	(7,463)	109,912		(90,396)	85
Ending Balance, Shares at Jun. 30, 2020			10,960,357
Beginning Balance at Sep. 30, 2020	$ 191,397		$ 181	181,487	(7,350)	112,612		(91,477)	(4,056)
Beginning Balance, Shares at Sep. 30, 2020	10,876,869		10,876,869
Net income	$ 12,501					12,501
Other comprehensive income (loss)	3,419								3,419
Cash dividends declared	(3,510)					(3,510)
Stock based compensation	421			421
Allocation of ESOP stock	473			142	331
Allocation of treasury shares to incentive plan				(550)				550
Allocation of treasury shares to incentive plan, Shares			43,582
Purchase of common stock	(5,449)							(5,449)
Purchase of common stock, Shares			(349,915)
Ending Balance at Jun. 30, 2021	$ 199,252		$ 181	181,500	(7,019)	121,603		(96,376)	(637)
Ending Balance, Shares at Jun. 30, 2021	10,570,536		10,570,536
Beginning Balance at Mar. 31, 2021	$ 198,608		$ 181	181,353	(7,132)	118,769		(93,785)	(778)
Beginning Balance, Shares at Mar. 31, 2021			10,731,235
Net income	4,026					4,026
Other comprehensive income (loss)	141								141
Cash dividends declared	(1,192)					(1,192)
Stock based compensation	95			95
Allocation of ESOP stock	165			52	113
Purchase of common stock	(2,591)							(2,591)
Purchase of common stock, Shares			(160,699)
Ending Balance at Jun. 30, 2021	$ 199,252		$ 181	$ 181,500	$ (7,019)	$ 121,603		$ (96,376)	$ (637)
Ending Balance, Shares at Jun. 30, 2021	10,570,536		10,570,536

Consolidated Statement of Cha_2

Consolidated Statement of Changes in Stockholders' Equity (Unaudited) (Parenthetical) - $ / shares	3 Months Ended		9 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
Cash dividends declared, per share	$ 0.12	$ 0.11	$ 0.35	$ 0.33
Retained Earnings [Member]
Cash dividends declared, per share	$ 0.12	$ 0.11	$ 0.35	$ 0.33

Consolidated Statement of Cash

Consolidated Statement of Cash Flows (Unaudited) - USD ($) $ in Thousands	9 Months Ended
	Jun. 30, 2021	Jun. 30, 2020
OPERATING ACTIVITIES
Net income	$ 12,501	$ 10,594
Adjustments to reconcile net income to net cash provided by operating activities:
Provision for loan losses	2,400	2,175
Provision for depreciation and amortization	790	809
Amortization and accretion of discounts and premiums, net	(771)	1,485
Net gain on sale of investment securities, available for sale	(459)	(381)
Realized and unrealized (gain) loss on equity securities	(15)	3
Gain on sale of loans, net	(1,737)	(791)
Origination of residential real estate loans for sale	(52,552)	(19,112)
Proceeds on sale of residential real estate loans	52,916	19,903
Compensation expense on ESOP	473	519
Amortization of right-of-use asset	669	660
Stock based compensation	421	415
Decrease (increase) in accrued interest receivable	1,684	(763)
Decrease in accrued interest payable	(487)	(173)
Earnings on bank-owned life insurance	(605)	(709)
Deferred federal income taxes	1,210	(23)
Decrease in accrued pension liability	(529)	(443)
(Gain) loss on foreclosed real estate, net	(639)	61
Amortization of intangible assets	204	208
Other, net	(1,394)	2,678
Net cash provided by operating activities	14,080	17,115
Investment securities available for sale:
Proceeds from sale of investment securities	19,673	24,009
Proceeds from principal repayments and maturities	77,413	44,409
Purchases	(34,104)	(44,623)
Investment securities held to maturity:
Proceeds from principal repayments and maturities	222
Purchases	(18,204)
Decrease (increase) in loans receivable, net	48,394	(97,349)
Redemption of regulatory stock	6,007	8,166
Purchase of regulatory stock	(2,803)	(15,168)
Proceeds from sale of foreclosed real estate	766	111
Purchase of premises, equipment and software	(545)	(871)
Net cash provided by (used for) investing activities	96,819	(81,316)
FINANCING ACTIVITIES
Increase in deposits, net	46,376	142,005
Net (decrease) increase in short-term borrowings	(111,713)	31,012
Proceeds from other borrowings		55,661
Repayment of other borrowings	(14,164)	(45,415)
Increase in advances by borrowers for taxes and insurance	7,044	8,542
Purchase of common stock	(5,449)	(5,565)
Dividends on common stock	(3,510)	(3,437)
Net cash (used for) provided by financing activities	(81,416)	182,803
Increase in cash and cash equivalents	29,483	118,602
CASH AND CASH EQUIVALENTS AT BEGINNING OF YEAR	155,917	52,242
CASH AND CASH EQUIVALENTS AT END OF YEAR	185,400	170,844
Cash Paid:
Interest	5,370	13,125
Income taxes		8
Noncash items:
Transfers from loans to foreclosed real estate	231	344
Death benefit receivable on BOLI	(3,865)
Initial recognition of operating right-of-use asset		(7,272)
Initial recognition of operating lease liability		7,272
Unrealized holding (losses) gains	$ (899)	$ 6,383

Nature of Operations and Basis

Nature of Operations and Basis of Presentation	9 Months Ended
	Jun. 30, 2021
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 and is currently inactive. 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 owned 100 percent 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 three and nine month periods ended June 30, 2021 and 2020 are not necessarily indicative of the results that may be expected for the year ending September 30, 2021.

Earnings per Share

Earnings per Share	9 Months Ended
	Jun. 30, 2021
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 nine month periods ended June 30, 2021 and 2020. Three Months Ended Nine Months Ended June 30, June 30, June 30, June 30, 2021 2020 2021 2020 Weighted-average common shares outstanding 18,133,095 18,133,095 18,133,095 18,133,095 Average treasury stock shares (7,473,715 ) (7,076,709 ) (7,362,121 ) (6,924,021 ) Average unearned ESOP shares (692,120 ) (741,156 ) (707,250 ) (752,513 ) Average unearned non-vested shares (61,535 ) (54,735 ) (57,683 ) (50,204 ) Weighted average common shares and common stock equivalents used to calculate basic earnings per share 9,905,725 10,260,495 10,006,041 10,406,357 Additional common stock equivalents (nonvested stock) used to calculate diluted earnings per share 2,063 234 2,688 257 Weighted average common shares and common stock equivalents used to calculate diluted earnings per share 9,907,788 10,260,729 10,008,729 10,406,614 At June 30, 2021 there were 23,312 shares of nonvested stock outstanding at an average weighted price of $16.15 per share that were not included in the computation of diluted earnings per share because to do so would have been anti-dilutive. At June 30, 2020 there were 42,520 shares of nonvested stock outstanding at an average weighted price of $16.15 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	9 Months Ended
	Jun. 30, 2021
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	9 Months Ended
	Jun. 30, 2021
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 Financial Instruments ‒ Credit Losses (Topic 326), Derivatives and Hedging (Topic 815), and Leases (Topic 842) In August 2018, the FASB issued ASU 2018-14, Compensation – Retirement Benefits (Topic 715-20) In April 2019, the FASB issued ASU 2019-04, Codification Improvements to Topic 326, Financial Instruments – Credit Losses, Topic 815, Derivatives and Hedging Financial Instruments Financial Instruments – Credit Losses Topic 815, Derivatives and Hedging In May 2019, the FASB issued ASU 2019-05, Financial Instruments – Credit Losses, Topic 326 In November 2019, the FASB issued ASU 2019-11, Codification Improvements to Topic 326, Financial Instruments – Credit Losses In December 2019, the FASB issued ASU 2019-12, Income Taxes (Topic 740 In January 2020, the FASB issued ASU 2020-1, Investments – Equity Securities (Topic 321) In March 2020, the FASB issued ASU 2020-3 , Codification Improvements to Financial Instruments. Financial Instruments In January 2020, the FASB issued ASU 2020-4, Reference Rate Reform (Topic 848): Facilitation of the Effects of Reference Rate Reform on Financial Reporting In August 2020, the FASB issued ASU 2020-06, Debt – Debt with Conversion and Other Options (Subtopic 470-20) and Derivatives and Hedging – Contracts in Entity’s Own Equity (Subtopic 815-40) In October 2020, the FASB issued ASU 2020-08, Codification Improvements to Subtopic 310-20, Receivables – Nonrefundable Fees and Other Costs, In October 2020, the FASB issued ASU 2020-10, Codification Improvements In November 2020, the FASB issued ASU 2020-11, Financial Services – Insurance (Topic 944), effectively implement the amendments in Accounting Standards Update No. 2018-12, Financial Services— Insurance: Targeted Improvements to the Accounting for Long-Duration Contracts (LDTI). The amendments in this Update defer the effective date of LDTI for all entities by one year, as (1) for public business entities that meet the definition of an SEC filer and are not SRCs, LDTI is effective for fiscal years beginning after December 15, 2022, and interim periods within those fiscal years; and (2) for all other entities, LDTI is effective for fiscal years beginning after December 15, 2024, and interim periods within fiscal years beginning after December 15, 2025. This Update is not expected to have a significant impact on the Company’s financial statements. In January 2021, the FASB issued ASU 2021-01, Reference Rate Reform (Topic 848) 2020 amendments in this update do not apply to contract modifications made, as well as new hedging relationships entered into, after December 31, 2022, and to existing hedging relationships evaluated for effectiveness for periods after December 31, 2022, except for certain hedging relationships existing as of December 31, 2022, that apply certain optional expedients in which the accounting effects are recorded through the end of the hedging relationship. 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 2021, the FASB issued ASU 2021-03, Intangibles – Goodwill and Other (Topic 350), In May 2021, the FASB issued ASU 2021-04, Earnings Per Share (Topic 260), Debt – Modifications and Extinguishments (Subtopic 470-50), Compensation – Stock Compensation (Topic 718), and Derivatives and Hedging – Contracts in Entity’s Own Equity (Subtopic 815-40), In July 2021, the FASB issued ASU 2021-05, Leases (Topic 842

Investment Securities

Investment Securities	9 Months Ended
	Jun. 30, 2021
Investments Debt And Equity Securities [Abstract]
Investment Securities	5. The amortized cost, gross unrealized gains and losses, and fair value of investment securities available for sale are summarized as follows (in thousands): June 30, 2021 Amortized Cost Gross Unrealized Gains Gross Unrealized Losses Fair Value Available for Sale Fannie Mae $ 28,237 $ 865 $ (30 ) $ 29,072 Freddie Mac 23,294 629 (10 ) 23,913 Governmental National Mortgage Association 7,614 206 (13 ) 7,807 Total mortgage-backed securities 59,145 1,700 (53 ) 60,792 Obligations of states and political subdivisions 17,251 545 — 17,796 U.S. government agency securities 1,998 13 — 2,011 Corporate obligations 54,695 997 (341 ) 55,351 Other debt securities 11,969 373 (122 ) 12,220 Total $ 145,058 $ 3,628 $ (516 ) $ 148,170 Held to Maturity Fannie Mae $ 10,080 $ 13 $ (8 ) $ 10,085 Freddie Mac 7,902 46 (21 ) 7,927 Total $ 17,982 $ 59 $ (29 ) $ 18,012 September 30, 2020 Amortized Cost Gross Unrealized Gains Gross Unrealized Losses Fair Value Available for Sale Fannie Mae $ 41,961 $ 1,385 $ (88 ) $ 43,258 Freddie Mac 31,642 964 (2 ) 32,604 Governmental National Mortgage Association 15,300 368 (99 ) 15,569 Total mortgage-backed securities 88,903 2,717 (189 ) 91,431 Obligations of states and political subdivisions 21,136 795 — 21,931 U.S. government agency securities 24,990 — — 24,990 U.S. government treasury securities 7,991 57 — 8,048 Corporate obligations 51,188 807 (521 ) 51,474 Other debt securities 14,265 495 (150 ) 14,610 Total $ 208,473 $ 4,871 $ (860 ) $ 212,484 The following is a summary of unrealized and realized gains and losses recognized in net income on equity securities during the three and nine months ended June 30, 2021 and 2020. (in thousands) Three Months Ended June 30, 2021 Three Months Ended June 30, 2020 Net gains recognized during the period on equity securities $ 4 $ 2 Less: Net gains recognized during the period on equity securities sold during the period — — Unrealized gains recognized during the reporting period on equity securities still held at the reporting date $ 4 $ 2 (in thousands) Nine Months Ended June 30, 2021 Nine Months Ended June 30, 2020 Net gains (losses) recognized during the period on equity securities $ 15 $ (3 ) Less: Net gains recognized during the period on equity securities sold during the period — — Unrealized gains (losses) recognized during the reporting period on equity securities still held at the reporting date $ 15 $ (3 ) The amortized cost and fair value of debt securities at June 30, 2021, 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 Cost Fair Value Amortized Cost Fair Value Due in one year or less $ 1,403 $ 1,408 $ — $ — Due after one year through five years 21,050 21,428 — — Due after five years through ten years 59,260 60,237 1,955 1,961 Due after ten years 63,345 65,097 16,027 16,051 Total $ 145,058 $ 148,170 $ 17,982 $ 18,012 For the three months ended June 30, 2021, the Company realized gross gains of $90,000 and gross losses of $48,000 on proceeds from the sale on investment securities of $9.0 million. For the three months ended June 30, 2020, the Company realized no gross gains or gross losses on proceeds from the sale on investment securities. For the nine months ended June 30, 2021, the Company realized gross gains of $507,000 and gross losses of $48,000 on proceeds from the sale on investment securities of $19.7 million. For the nine months ended June 30, 2020, the Company realized gross gains of $420,000 and gross losses of $39,000 on proceeds from the sale on investment securities of $24.0 million 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 (in thousands): June 30, 2021 Number of Securities Less than Twelve Months Twelve Months or Greater Total Fair Value Gross Unrealized Losses Fair Value Gross Unrealized Losses Fair Value Gross Unrealized Losses Fannie Mae 9 $ 6,122 $ (10 ) $ 4,582 $ (28 ) $ 10,704 $ (38 ) Freddie Mac 5 3,965 (31 ) — — 3,965 (31 ) Governmental National Mortgage Association 4 409 (1 ) 1,817 (12 ) 2,226 (13 ) Corporate obligations 17 11,396 (274 ) 1,926 (67 ) 13,322 (341 ) Other debt securities 8 — — 2,453 (122 ) 2,453 (122 ) Total 43 $ 21,892 $ (316 ) $ 10,778 $ (229 ) $ 32,670 $ (545 ) September 30, 2020 Less than Twelve Months Twelve Months or Greater Total Number of Securities Fair Value Gross Unrealized Losses Fair Value Gross Unrealized Losses Fair Value Gross Unrealized Losses Fannie Mae 8 $ 1,397 $ (19 ) $ 5,827 $ (69 ) $ 7,224 $ (88 ) Freddie Mac 1 330 (2 ) — — 330 (2 ) Governmental National Mortgage Association 7 4,428 (61 ) 2,996 (38 ) 7,424 (99 ) Corporate obligations 20 13,213 (93 ) 6,573 (428 ) 19,786 (521 ) Other debt securities 10 — — 3,879 (150 ) 3,879 (150 ) Total 46 $ 19,368 $ (175 ) $ 19,275 $ (685 ) $ 38,643 $ (860 ) 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 June 30 , 2021, 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	9 Months Ended
	Jun. 30, 2021
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): June 30, 2021 September 30, 2020 Real estate loans: Residential $ 584,368 $ 610,172 Construction 12,236 11,853 Commercial 578,506 509,628 Commercial 95,153 139,603 Obligations of states and political subdivisions 57,070 79,230 Home equity loans and lines of credit 38,571 40,800 Auto loans 18,805 39,795 Other 1,600 2,293 1,386,309 1,433,374 Less allowance for loan losses 17,693 15,400 Net loans $ 1,368,616 $ 1,417,974 During 2020 and 2021 the Company participated in the Paycheck Protection Program (“PPP”), administered directly by the U.S. SBA. The PPP provides loans to small businesses who were affected by economic conditions as a result of COVID-19 to provide cash-flow assistance to employers who maintain their payroll (including healthcare and certain related expenses), mortgage interest, rent, leases, utilities and interest on existing debt during the COVID-19 emergency. The PPP loans are fully guaranteed by the SBA and may be eligible for forgiveness by the SBA to the extent that the proceeds are used to cover eligible payroll costs, interest costs, rent, and utility costs over a period of up to 24 weeks after the loan is made as long as certain conditions are met regarding employee retention and compensation levels. PPP loans deemed eligible for forgiveness by the SBA will be repaid by the SBA to the Company. PPP loans are included in the Commercial loan category. In accordance with the SBA terms and conditions on these PPP loans, the Company received approximately $2.4 million in fees associated with the processing of these loans. Upon funding of the loan, these fees were deferred and will be amortized over the life of the loan as an adjustment to yield in accordance with FASB ASC 310-20-25-2. Included in commercial loans in the above table are 442 loans totaling $44.2 million originated by the Company under the Paycheck Protection Program through the quarter ended June 30, 2021 compared to 673 loans totaling $76.8 million at September 30, 2020. These loans mature in two or five years. Purchased loans acquired in a business combination are recorded at fair value on their purchase date without a carryover of the related allowance for loan losses. The following table presents additional information regarding loans acquired and accounted for in accordance with ASC 310-30 (in thousands): June 30, 2021 September 30, 2020 Acquired Loans with Specific Evidence or Deterioration in Credit Quality (ASC 310-30) Acquired Loans with Specific Evidence or Deterioration in Credit Quality (ASC 310-30) Outstanding balance $ 942 $ 1,086 Carrying amount $ 880 $ 1,025 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 Evaluated for Impairment Loans Acquired with Deteriorated Credit Quality Collectively Evaluated for Impairment June 30, 2021 Real estate loans: Residential $ 584,368 $ 2,493 $ — $ 581,875 Construction 12,236 — — 12,236 Commercial 578,506 11,330 880 566,296 Commercial 95,153 5,320 — 89,833 Obligations of states and political subdivisions 57,070 — — 57,070 Home equity loans and lines of credit 38,571 92 — 38,479 Auto loans 18,805 73 — 18,732 Other 1,600 9 — 1,591 Total $ 1,386,309 $ 19,317 $ 880 $ 1,366,112 Total Loans Individually Evaluated for Impairment Loans Acquired with Deteriorated Credit Quality Collectively Evaluated for Impairment September 30, 2020 Real estate loans: Residential $ 610,172 $ 3,949 $ — $ 606,223 Construction 11,853 — — 11,853 Commercial 509,628 11,322 1,025 497,281 Commercial 139,603 1,595 — 138,008 Obligations of states and political sub divisions 79,230 — — 79,230 Home equity loans and lines of credit 40,800 117 — 40,683 Auto loans 39,795 210 — 39,585 Other 2,293 11 — 2,282 Total $ 1,433,374 $ 17,204 $ 1,025 $ 1,415,145 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 Investment Unpaid Principal Balance Associated Allowance June 30, 2021 With no specific allowance recorded: Real estate loans Residential $ 2,384 $ 3,587 $ — Construction — — — Commercial 10,929 12,922 — Commercial 676 910 — Obligations of states and political subdivisions — — — Home equity loans and lines of credit 92 180 — Auto loans 73 99 — Other 9 21 — Total 14,163 17,719 — With an allowance recorded: Real estate loans Residential 109 113 18 Construction — — — Commercial 401 415 21 Commercial 4,644 4,686 848 Obligations of states and political subdivisions — — — Home equity loans and lines of credit — — — Auto loans — — — Other — — — Total 5,154 5,214 887 Total: Real estate loans Residential 2,493 3,700 18 Construction — — — Commercial 11,330 13,337 21 Commercial 5,320 5,596 848 Obligations of states and political subdivisions — — Home equity loans and lines of credit 92 180 — Auto loans 73 99 — Other 9 21 — Total Impaired Loans $ 19,317 $ 22,933 $ 887 Recorded Investment Unpaid Principal Balance Associated Allowance September 30, 2020 With no specific allowance recorded: Real Estate Loans Residential $ 3,699 $ 5,070 $ — Construction — — — Commercial 4,203 6,342 — Commercial 1,539 1,625 — Obligations of states and political subdivisions — — — Home equity loans and lines of credit 117 222 — Auto Loans 72 131 — Other 11 22 — Total 9,641 13,412 — With an allowance recorded: Real Estate Loans Residential 250 271 26 Construction — — — Commercial 7,119 7,169 132 Commercial 56 57 20 Obligations of states and political subdivisions — — — Home equity loans and lines of credit — — — Auto Loans 138 143 43 Other — — — Total 7,563 7,640 221 Total: Real Estate Loans Residential 3,949 5,341 26 Construction — — — Commercial 11,322 13,511 132 Commercial 1,595 1,682 20 Obligations of states and political subdivisions — — Home equity loans and lines of credit 117 222 — Auto Loans 210 274 43 Other 11 22 — Total Impaired Loans $ 17,204 $ 21,052 $ 221 The following table 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 June 30, 2021 2020 2021 2020 Average Recorded Investment Average Recorded Investment Interest Income Recognized Interest Income Recognized With no specific allowance recorded: Real estate loans Residential $ 1,107 $ 3,602 $ 2 $ 1 Construction — — — — Commercial 7,422 5,108 6 — Commercial 1,946 2,323 — — Obligations of states and political subdivisions — — — — Home equity loans and lines of credit 90 244 — — Auto loans 50 74 — 1 Other 10 13 — — Total 10,625 11,364 8 2 With an allowance recorded: Real estate loans Residential 146 361 — — Construction — — — — Commercial 4,985 182 — — Commercial 4,903 168 — — Obligations of states and political subdivisions — — — — Home equity loans and lines of credit — 6 — — Auto loans 12 85 — — Other — — — — Total 10,046 802 — — Total: Real estate loans Residential 1,253 3,963 2 1 Construction — — — — Commercial 12,407 5,290 6 — Commercial 6,849 2,491 — Obligations of states and political subdivisions — — — — Home equity loans and lines of credit 90 250 — — Auto loans 62 159 — 1 Other 10 13 — — Total Impaired Loans $ 20,671 $ 12,166 $ 8 $ 2 For the Nine Months Ended June 30, 2021 2020 2021 2020 Average Recorded Investment Average Recorded Investment Interest Income Recognized Interest Income Recognized With no specific allowance recorded: Real estate loans Residential $ 1,304 $ 3,800 $ 3 $ 2 Construction — — — — Commercial 8,408 3,203 11 1 Commercial 1,569 1,260 — 4 Obligations of states and political subdivisions — — — — Home equity loans and lines of credit 98 253 — — Auto loans 52 130 — 1 Other 11 14 — — Total 11,442 8,660 14 8 With an allowance recorded: Real estate loans Residential 171 304 — — Construction — — — — Commercial 4,908 239 — — Commercial 2,222 97 — — Obligations of states and political subdivisions — — — — Home equity loans and lines of credit — 2 — — Auto loans 28 128 1 — Other — 8 — — Total 7,329 778 1 — Total: Real estate loans Residential 1,475 4,104 3 2 Construction — — — — Commercial 13,316 3,442 11 1 Commercial 3,791 1,357 4 Obligations of states and political subdivisions — — — — Home equity loans and lines of credit 98 255 — — Auto loans 80 258 1 1 Other 11 22 — — Total Impaired Loans $ 18,771 $ 9,438 $ 15 $ 8 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 June 30, 2021 and September 30, 2020 (in thousands): Pass Special Mention Substandard Doubtful or Loss Total June 30, 2021 Commercial real estate loans $ 539,774 $ 16,422 $ 22,310 $ — $ 578,506 Commercial 89,317 159 5,677 — 95,153 Obligations of states and political subdivisions 57,070 — — — 57,070 Total $ 686,161 $ 16,581 $ 27,987 $ — $ 730,729 Pass Special Mention Substandard Doubtful or Loss Total September 30, 2020 Commercial real estate loans $ 479,475 $ 15,022 $ 15,131 $ — $ 509,628 Commercial 137,860 — 1,743 — 139,603 Obligations of states and political subdivisions 79,230 — — — 79,230 Total $ 696,565 $ 15,022 $ 16,874 $ — $ 728,461 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 June 30, 2021 and September 30, 2020 (in thousands): Performing Non- performing Total June 30, 2021 Real estate loans: Residential $ 580,970 $ 3,398 $ 584,368 Construction 12,236 — 12,236 Home equity loans and lines of credit 38,408 163 38,571 Auto loans 18,725 80 18,805 Other 1,585 15 1,600 Total $ 651,924 $ 3,656 $ 655,580 Performing Non- performing Total September 30, 2020 Real estate loans: Residential $ 605,549 $ 4,623 $ 610,172 Construction 11,853 — 11,853 Home equity loans and lines of credit 40,581 219 40,800 Auto loans 39,572 223 39,795 Other 2,282 11 2,293 Total $ 699,837 $ 5,076 $ 704,913 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 June 30, 2021 and September 30, 2020 (in thousands): 31-60 Days 61-89 Days 90 + Days Past Due and Total Purchased Credit Impaired Total Current Past Due Past Due Accruing Non­accrual Past Due Accruing Non­accrual Loans June 30, 2021 Real estate loans: Residential $ 580,186 $ 460 $ 324 $ — $ 3,398 $ 4,182 $ — $ — $ 584,368 Construction 12,236 — — — — — — — 12,236 Commercial 565,745 — — — 11,881 11,881 227 653 578,506 Commercial 89,815 — — — 5,338 5,338 — — 95,153 Obligations of states and political subdivisions 57,070 — — — — — — — 57,070 Home equity loans and lines of credit 38,103 222 83 — 163 468 — — 38,571 Auto loans 18,495 219 11 — 80 310 — — 18,805 Other 1,585 — — — 15 15 — — 1,600 Total $ 1,363,235 $ 901 $ 418 $ — $ 20,875 $ 22,194 $ 227 $ 653 $ 1,386,309 31-60 Days 61-89 Days 90 + Days Past Due and Total Purchased Credit Impaired Total Current Past Due Past Due Accruing Non­accrual Past Due Accruing Non­accrual Loans September 30, 2020 Real estate loans: Residential $ 604,168 $ 979 $ 402 $ — $ 4,623 $ 6,004 $ — $ — $ 610,172 Construction 11,853 — — — — — — — 11,853 Commercial 494,881 1,085 — — 12,637 13,722 236 789 509,628 Commercial 137,769 6 — — 1,828 1,834 — — 139,603 Obligations of states and political subdivisions 79,230 — — — — — — — 79,230 Home equity loans and lines of credit 40,533 48 — — 219 267 — — 40,800 Auto loans 38,971 593 8 — 223 824 — — 39,795 Other 2,282 — — — 11 11 — — 2,293 Total $ 1,409,687 $ 2,711 $ 410 $ — $ 19,541 $ 22,662 $ 236 $ 789 $ 1,433,374 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. In addition, for the three and nine months ended June 30, 2021, consideration was given and a credit provision was recorded for loans granted short term payment relief due to the COVID pandemic. 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 June 30, 2021 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 for the three and nine months ended June 30, 2021 and 2020 (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 ALL balance at March 31, 2021 $ 4,299 $ 117 $ 8,943 $ 1,770 $ 487 $ 337 $ 439 $ 20 $ 742 $ 17,154 Charge-offs (55 ) — — (200 ) — — (18 ) — — (273 ) Recoveries 149 — 20 — — 1 42 — — 212 Provision (184 ) 39 564 88 (88 ) (17 ) (120 ) — 318 600 ALL balance at June 30, 2021 $ 4,209 $ 156 $ 9,527 $ 1,658 $ 399 $ 321 $ 343 $ 20 $ 1,060 $ 17,693 ALL balance at March 31, 2020 $ 4,330 $ 55 $ 4,563 $ 2,180 $ 359 $ 351 $ 1,104 $ 29 $ 208 $ 13,179 Charge-offs (42 ) — (4 ) — — (21 ) (135 ) (15 ) — (217 ) Recoveries 1 — 17 — — 1 49 — — 68 Provision 78 48 2,294 (1,206 ) 185 5 (55 ) 10 (59 ) 1,300 ALL balance at June 30, 2020 $ 4,367 $ 103 $ 6,870 $ 974 $ 544 $ 336 $ 963 $ 24 $ 149 $ 14,330 ALL balance at September 30, 2020 $ 4,301 $ 127 $ 7,209 $ 874 $ 555 $ 337 $ 780 $ 25 $ 1,192 $ 15,400 Charge-offs (59 ) — (76 ) (209 ) — (8 ) (244 ) (1 ) — (597 ) Recoveries 213 — 56 — — 4 217 — — 490 Provision (246 ) 29 2,338 993 (156 ) (12 ) (410 ) (4 ) (132 ) 2,400 ALL balance at June 30, 2021 $ 4,209 $ 156 $ 9,527 $ 1,658 $ 399 $ 321 $ 343 $ 20 $ 1,060 $ 17,693 ALL balance at September 30, 2019 $ 4,243 $ 53 $ 3,806 $ 1,870 $ 343 $ 329 $ 1,384 $ 28 $ 574 $ 12,630 Charge-offs (72 ) — (54 ) — — (61 ) (717 ) (20 ) — (924 ) Recoveries 7 — 77 1 — 4 358 2 — 449 Provision 189 50 3,041 (897 ) 201 64 (62 ) 14 (425 ) 2,175 ALL balance at June 30, 2020 $ 4,367 $ 103 $ 6,870 $ 974 $ 544 $ 336 $ 963 $ 24 $ 149 $ 14,330 During the three months ended June 30, 2021, 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. Provision expense was also recorded for possible loan losses due to the economic slowdown caused by COVID-19 restrictions. 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. During the three months ended June 30, 2020 the Company recorded provision expense for the residential real estate loans, commercial real estate loans, obligations of states and political subdivisions, construction loans, home equity loans and lines of credit and other loan segments, due to either increased loan balances, changes in the loan mix within the pool, and/or charge-off activity in those segments. Provision expense was also recorded for possible loan losses due to the economic slowdown caused by COVID-19 restrictions. Credit provisions were recorded for loan loss for the commercial loans and auto loan segments. During the nine months ended June 30, 2021, the Company recorded provision expense for the construction real estate loans, commercial real estate loans and commercial loans, due to either increased loan balances, changes in the loan mix within the pool, and/or charge-off activity in those segments. Provision expense was also recorded for possible loan losses due to the economic slowdown caused by COVID-19 restrictions. 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 segments, auto loan and other loan segments. During the nine months ended June 30, 2020 the Company recorded provision expense for the residential real estate loans, commercial real estate loans, obligations of states and political subdivisions, construction loans, home equity loans and lines of credit and other loan segments, due to either increased loan balances, changes in the loan mix within the pool, and/or charge-off activity in those segments. Provision expense was also recorded for possible loan losses due to the economic slowdown caused by COVID-19 restrictions. Credit provisions were recorded for loan loss for the commercial loans and auto loan segments. The Company is closely monitoring all customer credit positions, particularly loans requesting payment relief. Such loans, as of June 30, 2021, amounted to approximately 2.3% of total loans outstanding, including $29.8 million in commercial real estate loans, $481,000 in commercial loans and $1.1 million in mortgage loans. As the economic impact of the COVID-19 pandemic continues to evolve, our customers may experience decreased cash flows, which may correlate to an inability to make timely loan payments. This, in turn, may require further increases in our allowance for loan losses and increases in the level of charge-offs in our loan portfolio. 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 June 30, 2021 and September 30, 2020 (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 evaluated for impairment $ 18 $ — $ 21 $ 848 $ — $ — $ — $ — $ — $ 887 Collectively evaluated for impairment 4,191 156 9,506 810 399 321 343 20 1,060 16,806 ALL balance at June 30, 2021 $ 4,209 $ 156 $ 9,527 $ 1,658 $ 399 $ 321 $ 343 $ 20 $ 1,060 $ 17,693 Individually evaluated for impairment $ 26 $ — $ 132 $ 20 $ — $ — $ 43 $ — $ — $ 221 Collectively evaluated for impairment 4,275 127 7,077 854 555 337 737 25 1,192 15,179 ALL balance at September 30, 2020 $ 4,301 $ 127 $ 7,209 $ 874 $ 555 $ 337 $ 780 $ 25 $ 1,192 $ 15,400 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. The following is a summary of troubled debt restructuring granted during the three months ended June 30, 2021 (dollars in thousands): For the Three Months Ended June 30, 2021 Number of Contracts Pre-Modification Outstanding Recorded Investment Post-Modification Outstanding Recorded Investment Troubled Debt Restructurings Real estate loans: Residential 1 $ 343 $ 343 Construction — — — Commercial 4 7,353 7,353 Commercial — — — Obligations of states and political subdivisions — — — Home equity loans and lines of credit — — — Auto loans — — — Other — — — Total $ 5 $ 7,696 $ 7,696 There were no new troubled debt restructurings granted for the three months ended June 30, 2020. The following is a summary of troubled debt restructuring granted during the nine months ended June 30, 2021 and 2020 (dollars in thousands): For the Nine Months Ended June 30, 2021 Number of Contracts Pre-Modification Outstanding Recorded Investment Post-Modification Outstanding Recorded Investment Troubled Debt Restructurings Real estate loans: Residential 2 $ 416 $ 416 Construction — — — Commercial 4 7,353 7,353 Commercial — — — Obligations of states and political subdivisions — — — Home equity loans and lines of credit — — — Auto loans — — — Other — — — Total 6 $ 7,769 $ 7,769 For the Nine Months Ended June 30, 2020 Number of Contracts Pre-Modification Outstanding Recorded Investment Post-Modification Outstanding Recorded Investment Troubled Debt Restructurings Real estate loans: Residential 1 $ 534 $ 534 Construction — — — Commercial — — — Commercial — — — Obligations of states and political subdivisions — — — Home equity loans and lines of credit — — — Auto loans — — — Other — — — Total 1 $ 534 $ 534 The five new troubled debt restructurings granted for the three months ended June 30, 2021, totaled $7.7 million and were granted interest rate and or terms concessions. The six new troubled debt restructurings granted for the nine months ended June 30, 2021, totaled $7.8 million and were granted terms and or interest rate concessions. The one troubled debt restructuring granted for the nine months ended June 30, 2020, totaled $534,000 and was granted an interest rate concession. For the three and nine months ended June 30, 2021 and 2020, no loans defaulted on a restructuring agreement within one year of modification. The Company continues to closely monitor all customer credit positions, particularly loans requesting payment relief. As of June 30, 2021, approximately 15 of our commercial clients had requested loan payment deferrals or payments of interest only on loans totaling $30.3 million. We have had similar requests from approximately five mortgage customers totaling $1.1 million. In accordance with interagency guidance issued in March 2020, these short-term deferrals are not considered troubled debt restructurings unless the borrower was previously experiencing financial difficulty. As the economic impact of the COVID-19 pandemic continues to evolve, our customers may experience decreased cash flows, which may correlate to an inability to make timely loan payments. This, in turn may require further increases in our allowance for loan losses and increases in the level of chargeoffs in our loan portfolio. There can be no assurance that our non-performing assets will not increase in the future due to the impact of COVID-19 or otherwise. We will continue to closely monitor credit risk and our exposure to increased loan losses resulting from the impact of COVID-19 on our commercial and consumer clients.

Deposits

Deposits	9 Months Ended
	Jun. 30, 2021
Deposits Liabilities Disclosures [Abstract]
Deposits	7. Deposits Deposits consist of the following major classifications (in thousands): June 30, 2021 September 30, 2020 Non-interest bearing demand accounts $ 277,814 $ 242,642 Interest bearing demand accounts 473,119 274,722 Money market accounts 410,310 401,863 Savings and club accounts 187,573 160,975 Certificates of deposit 241,256 463,494 Total $ 1,590,072 $ 1,543,696

Net Periodic Benefit Cost-Defin

Net Periodic Benefit Cost-Defined Benefit Plan	9 Months Ended
	Jun. 30, 2021
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, 2020 included in the Company’s Annual Report on Form 10-K. The following table comprises the components of net periodic benefit cost for the three and nine-month periods ended June 30, 2021 and 2020 (in thousands): For the Three Months Ended June 30, For the Nine Months Ended June 30, 2021 2020 2021 2020 Service Cost $ — $ — $ — $ — Interest Cost 112 121 338 364 Expected return on plan assets (289 ) (268 ) (867 ) (807 ) Amortization of net loss from earlier periods 56 — 166 — Net periodic benefit cost $ (121 ) $ (147 ) $ (363 ) $ (443 ) 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 will enter the plan after February 28, 2017; no additional years of service for benefit accrual purposes will be credited after the freeze date under the plan; and compensation earned by participants after the freeze date will not be taken into account under the plan.

Equity Incentive Plan

Equity Incentive Plan	9 Months Ended
	Jun. 30, 2021
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 June 30, 2021 vest over periods ranging from 3 to 39 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 June 30, 2021 and 2020, the Company recorded $95,000 and $82,000 of share-based compensation expense, respectively, comprised of restricted stock expense. For the nine months ended June 30, 2021 and 2020, the Company recorded $421,000 and $415,000 of share-based compensation expense, respectively, comprised of restricted stock expense. Expected future compensation expense relating to the restricted shares outstanding at June 30, 2021 is $679,000 over the remaining vesting period of 3.25 years. The following is a summary of the status of the Company’s restricted stock as of June 30, 2021, and changes therein during the nine month period then ended: Number of Restricted Weighted- average Grant Date Fair Value Nonvested at September 30, 2020 35,245 $ 16.15 Granted 43,939 12.56 Vested (10,834 ) 14.75 Forfeited — — Nonvested at June 30, 2021 68,350 $ 14.06

Fair Value

Fair Value	9 Months Ended
	Jun. 30, 2021
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 June 30, 2021 and September 30, 2020 by level within the fair value hierarchy (in thousands). Recurring Fair Value Measurements at Reporting Date June 30, 2021 Assets Level I Level II Level III Total Investment securities available for sale: Mortgage backed securities $ — $ 60,792 $ — $ 60,792 Obligations of states and political subdivisions — 17,796 — 17,796 U.S. government agencies — 2,011 — 2,011 Corporate obligations — 42,071 13,280 55,351 Other debt securities — 12,220 — 12,220 Total debt securities $ — $ 134,890 $ 13,280 $ 148,170 Equity securities- financial services 32 — — 32 Derivatives and hedging activities — 2,358 — 2,358 Liabilities Derivatives and hedging activities — 1,763 — 1,763 September 30, 2020 Assets Level I Level II Level III Total Investment securities available for sale: Mortgage backed securities $ — $ 91,431 $ — $ 91,431 Obligations of states and political subdivisions — 21,931 — 21,931 U.S. government treasury securities — 24,990 — 24,990 U.S. government agencies — 8,048 — 8,048 Corporate obligations — 43,214 8,260 51,474 Other debt securities — 14,610 — 14,610 Total debt securities $ — $ 204,224 $ 8,260 $ 212,484 Equity securities-financial services 17 — — 17 Derivatives and hedging activities — 2,192 — 2,192 Liabilities: Derivatives and hedging activities — 7,002 — 7,002 The following table presents a summary of changes in the fair value of the Company’s Level III investments for the three and nine month periods ended June 30, 2021 and 2020 (in thousands). Fair Value Measurement Using Significant Unobservable Inputs (Level III) Three Months Ended June 30, 2021 June 30, 2020 Beginning balance $ 4,678 $ 7,821 Purchases, sales, issuances, settlements, net 8,541 (1,000 ) Total unrealized gain (loss): Included in earnings — — Included in other comprehensive income (loss) 61 (34 ) Transfers in and/or out of Level III — — $ 13,280 $ 6,787 Fair Value Measurement Using Significant Unobservable Inputs (Level III) Nine Months Ended June 30, 2021 June 30, 2020 Beginning balance $ 8,260 $ 7,792 Purchases, sales, issuances, settlements, net 4,791 (1,000 ) Total unrealized gain (loss): Included in earnings — — Included in other comprehensive (loss) income 229 (5 ) Transfers in and/or out of Level III — — $ 13,280 $ 6,787 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 June 30, 2021 and September 30, 2020 by level within the fair value hierarchy: Non-Recurring Fair Value Measurements at Reporting Date (in thousands) June 30, 2021 Level I Level II Level III Total Foreclosed real estate $ — $ — $ 373 $ 373 Impaired loans — — 18,430 18,430 September 30, 2020 Level I Level II Level III Total Foreclosed real estate $ — $ — $ 269 $ 269 Impaired loans — — 16,983 16,983 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 Estimate Valuation Techniques Unobservable Input Range June 30, 2021 Impaired loans $ 18,430 Appraisal of collateral (1) Appraisal adjustments (2) 0% to 35% (21.1%) Foreclosed real estate owned 373 Appraisal of collateral (1) Appraisal adjustments (2) 20% to 35% (29.8%) Quantitative Information about Level 3 Fair Value Measurements (dollars in thousands) Fair Value Estimate Valuation Techniques Unobservable Input Range September 30, 2020 Impaired loans $ 16,983 Appraisal of collateral (1) Appraisal adjustments (2) 0% to 35% (20.5%) Foreclosed real estate owned 269 Appraisal of collateral (1) Appraisal adjustments (2) 20% to 35% (25.7%) (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 June 30, 2021, 61 impaired loans with a carrying value of $19.3 million were reduced by specific valuation allowance totaling $887,000 resulting in a net fair value of $18.4 million based on Level 3 inputs. At September 30, 2020, 111 impaired loans with a carrying value of $17.2 million were reduced by a specific valuation totaling $221,000 resulting in a net fair value of $17.0 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 June 30, 2021 and September 30, 2020 by level within the fair value hierarchy: June 30, 2021 (in thousands) Carrying Level I Level II Level III Total Fair Value Financial assets: Investment securities held to maturity $ 17,982 $ — $ — $ 18,012 $ 18,012 Loans receivable, net 1,368,616 — — 1,381,913 1,381,913 Mortgage servicing rights 694 — — 816 816 Financial liabilities: Deposits $ 1,590,072 $ 1,348,816 $ — $ 241,524 $ 1,590,340 September 30, 2020 (in thousands) Carrying Level I Level II Level III Total Fair Value Financial assets: Loans receivable, net $ 1,417,974 $ — $ — $ 1,426,962 $ 1,426,962 Mortgage servicing rights 393 — — 393 393 Financial liabilities: Deposits $ 1,543,696 $ 1,080,201 $ — $ 467,630 $ 1,547,831 Other borrowings 14,164 — — 17,721 17,721 For Cash and Cash Equivalents, Loans Held For Sale, Accrued Interest Receivable, Regulatory Stock, Bank Owned Life Insurance, Short-Term Borrowings, Advances by Borrowers for Taxes and Insurance, and Accrued Interest Payable the carrying value is a reasonable estimate of the fair value and are considered Level 1 measurements. The fair value approximates the current book value.

Accumulated Other Comprehensive

Accumulated Other Comprehensive Income (Loss)	9 Months Ended
	Jun. 30, 2021
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 nine month periods ended June 30, 2021 and 2020 is as follows (in thousands): Accumulated Other Comprehensive Income/(Loss) Defined Benefit Pension Plan Unrealized (Losses) on Securities Available for Sale Derivatives Total Balance at March 31, 2021 $ (3,519 ) $ 2,154 $ 587 $ (778 ) Other comprehensive income (loss) before reclassifications — 339 (463 ) (124 ) Amounts reclassified from accumulated other comprehensive income (loss) (44 ) (34 ) 343 265 Period change (44 ) 305 (120 ) 141 Balance at June 30, 2021 $ (3,563 ) $ 2,459 $ 467 $ (637 ) Balance at March 31, 2020 $ (1,527 ) $ 4,987 $ (2,464 ) $ 996 Other comprehensive income (loss) before reclassifications — 863 (1,859 ) (996 ) Amounts reclassified from accumulated other comprehensive income (loss) — — 85 85 Period change — 863 (1,774 ) (911 ) Balance at June 30, 2020 $ (1,527 ) $ 5,850 $ (4,238 ) $ 85 Accumulated Other Comprehensive Income/(Loss) Defined Benefit Pension Plan Unrealized Gains (Losses) on Securities Available for Sale Derivatives Total Balance at September 30, 2020 $ (3,432 ) $ 3,167 $ (3,791 ) $ (4,056 ) Other comprehensive income (loss) before reclassifications — (345 ) 2,879 2,534 Amounts reclassified from accumulated other comprehensive income (loss) (131 ) (363 ) 1,379 885 Period change (131 ) (708 ) 4,258 3,419 Balance at June 30, 2021 $ (3,563 ) $ 2,459 $ 467 $ (637 ) Balance at September 30, 2019 $ (1,527 ) $ 807 $ (560 ) $ (1,280 ) Other comprehensive income (loss) before reclassifications — 5,344 (3,717 ) 1,627 Amounts reclassified from accumulated other comprehensive income (loss) — (301 ) 39 (262 ) Period change — 5,043 (3,678 ) 1,365 Balance at June 30, 2020 $ (1,527 ) $ 5,850 $ (4,238 ) $ 85 The following table presents significant amounts reclassified out of each component of accumulated other comprehensive income (loss) for the three and nine month periods ended June 30, 2021 and 2020 (in thousands): Amount Reclassified from Accumulated Other Comprehensive Income (Loss) Details About Accumulated Other Comprehensive Income (Loss) Components Accumulated Other Comprehensive Income (Loss) for the Three Months Ended June 30, Affected Line Item in the Consolidated Statement of Operations 2021 2020 Securities available for sale Net securities gains reclassified into earnings $ 42 $ — Gain on sale of investment securities available for sale, net Related income tax expense (8 ) — Income taxes Net effect on accumulated other comprehensive income (loss) for the period 34 — Defined benefit pension plan Amortization of net gain and prior service costs 56 — Compensation and employee benefits Related income tax expense (12 ) — Income taxes Net effect on accumulated other comprehensive income (loss) for the period 44 — Derivatives and hedging activities: Interest expense, effective portion (434 ) (108 ) Interest expense Related income tax expense 91 23 Income taxes Net effect on accumulated other comprehensive income (loss) for the period (343 ) (85 ) Total reclassification for the period $ (265 ) $ (85 ) Amount Reclassified from Accumulated Other Comprehensive Income (Loss) Accumulated Other Comprehensive Income (Loss) For the Nine Months Ended June 30, Affected Line Item in the Consolidated Statement of Operations 2021 2020 Securities available for sale: Net securities gains reclassified into earnings $ 459 $ 381 Gain on sale of investment securities available for sale, net Related income tax expense (96 ) (80 ) Income taxes Net effect on accumulated other comprehensive income (loss) for the period 363 301 Net of tax Defined benefit pension plan Amortization of net (loss) gain and prior service costs 166 — Related income tax expense (35 ) — Income taxes Net effect on accumulated other comprehensive income (loss) for the period 131 — Derivative and hedging activities: Interest expense, effective portion (1,745 ) (50 ) Interest expense Related income tax expense 366 11 Income taxes Net effect on accumulated other comprehensive income (loss) for the period (1,379 ) (39 ) Total reclassification for the period $ (885 ) $ 262

Derivative and Hedging Activiti

Derivative and Hedging Activities	9 Months Ended
	Jun. 30, 2021
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 well as their classification on the Consolidated Balance Sheet as of June 30, 2021 and September 30, 2020 (in thousands). Fair Values of Derivative Instruments Asset Derivatives As of June 30, 2021 As of September 30, 2020 Hedged Item Notional Amount Balance Sheet Location Fair Value Notional Amount Balance Sheet Location Fair Value Brokered Deposits $ 150,000 Other Assets $ 1,171 $ - Other Assets $ — Commercial Loans 70,108 Other Assets 1,187 55,784 Other Assets 2,192 Total $ 220,108 $ 2,358 $ 55,784 $ 2,192 Fair Values of Derivative Instruments Liability Derivatives As of June 30, 2021 As of September 30, 2020 Hedged Item Notional Amount Balance Sheet Location Fair Value Notional Amount Balance Sheet Location Fair Value FHLB Advances $ - Other Liabilities $ - $ 25,000 Other Liabilities $ 700 Brokered Deposits 95,000 Other Liabilities 578 410,000 Other Liabilities 4,098 Commercial Loans 102,665 Other Liabilities 1,185 70,784 Other Liabilities 2,204 Total $ 197,665 $ 1,763 $ 505,784 $ 7,002 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 June 30, 2021, the Company had twelve interest rate swaps with a notional principal amount of $245 million associated with the Company’s cash outflows associated with various brokered certificates and $173 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 periods ended June 30, 2021 and 2020. 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 June 30, 2021 and 2020, the Company had $434,000 and $108,000 of losses respectively, which resulted in an increase to interest expense. During the nine months ended June 30, 2021, the Company had $1.7 million of losses which resulted in an increase to interest expense During the nine months ended June 30, 2020, the Company had $50,000 in losses which resulted in an increase to interest expense. During the next twelve months, the Company estimates that $835,000 will be reclassified as an increase 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 month periods ended June 30, 2021 and 2020 (in thousands). The Effect of Fair Value and Cash Flow Hedge Accounting on Accumulated Other Comprehensive Income (Loss) Derivatives in Hedging Relationships Loss Recognized in OCI on Derivative (Effective Portion) Three Months Ended June 30, Location of Gain or (Loss) Reclassified from Accumulated OCI into Income (Effective Portion) Loss Recognized in OCI on Derivative (Effective Portion) Three Months Ended June 30, Derivatives in Cash Flow Hedging Relationships 2021 2020 2021 2020 Interest Rate Products $ (156 ) $ (2,244 ) Interest expense $ (434 ) $ (108 ) Total $ (156 ) $ (2,244 ) $ (434 ) $ (108 ) Derivatives in Cash Flow Hedging Relationships Gain (Loss) Recognized in OCI on Derivative (Effective Portion) Nine Months Ended June 30, Location of Gain or (Loss) Reclassified from Accumulated OCI into Income (Effective Portion) Loss Recognized in OCI on Derivative (Effective Portion) Nine Months Ended June 30, 2021 2020 2021 2020 Interest Rate Products $ 5,390 $ (4,655 ) Interest expense $ (1,745 ) $ (50 ) Total $ 5,390 $ (4,655 ) $ (1,745 ) $ (50 ) 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 June 30, 2021, the Company had derivatives in a net liability position and was required to post $1.2 million in collateral against its obligations under these agreements. As of September 30, 2020, the Company was required to post $7.5 million in collateral against its obligations under these agreements. If the Company had breached any of these provisions at June 30, 2021 and September 30, 2020, it could have been required to settle its obligations under the agreements at the termination value.

Contingent Liabilities

Contingent Liabilities	9 Months Ended
	Jun. 30, 2021
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 Bank was named as a defendant in an action commenced on December 8, 2016 by one plaintiff who will also seek to pursue this action as a class action on behalf of the entire class of people similarly situated. The plaintiff alleges that a bank previously acquired by ESSA Bancorp 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 Bank’s 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 Bank, and remanded the case back 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. In an order dated November 24, 2020, the court referred the case to a Magistrate Judge to assist in mediation efforts. The case was stayed while the parties explored the potential for a negotiated resolution. The parties engaged in mediation but did not resolve the matter. The parties are now in the discovery process. The Bank will continue to defend against plaintiffs’ allegations. To the extent that this matter could result in exposure to the Bank, the amount of such exposure is not currently estimable. On May 29, 2020, the Bank was named as a defendant in a second action commenced by three plaintiffs who will 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 ESSA Bancorp 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 Bank moved to dismiss the Sherman Act claim on October 14, 2020, and that motion was denied on April 2, 2021. The parties are now in the discovery process. The Bank will continue to defend against plaintiffs’ allegations. To the extent that this matter could result in exposure to the Bank, the amount of such exposure is not currently estimable.

Revenue Recognition

Revenue Recognition	9 Months Ended
	Jun. 30, 2021
Revenue From Contract With Customer [Abstract]
Revenue Recognition	14. 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	9 Months Ended
	Jun. 30, 2021
Leases [Abstract]
Leases	15. 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. On October 1, 2019, the Company adopted ASU No. 2016-02 “Leases” (Topic 842) 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. All of our leases are classified as operating leases, and therefore, were previously not recognized on the Company’s Consolidated Balance sheet. With the adoption of 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) June 30, 2021 Lease Right-of-Use Assets Classification Operating lease right-of-use assets Other assets $ 6,446 Total Lease Right-Of-Use Assets $ 6,446 (in thousands) June 30, 2021 Lease Liabilities Classification Operating lease Liabilities Other liabilities $ 6,580 Total Lease Liabilities $ 6,580 (in thousands) September 30, 2020 Lease Right-of-Use Assets Classification Operating lease right-of-use assets Other assets $ 7,082 Total Lease Right-Of-Use Assets $ 7,082 (in thousands) September 30, 2020 Lease Liabilities Classification Operating lease Liabilities Other liabilities $ 7,161 Total Lease Liabilities $ 7,161 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. For operating leases existing prior to October 1, 2019, the rate for the remaining lease term as of October 1, 2019 was used. June 30, 2021 Weighted average remaining lease term Operating leases 13.3 years Weighted average discount rate Operating leases 2.42 % 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 June 30, 2021 Operating lease cost $ 264 Variable lease cost 70 Net lease cost $ 334 Lease Costs (in thousands) Three Months Ended June 30, 2020 Operating lease cost $ 259 Variable lease cost 61 Net lease cost $ 320 Lease Costs (in thousands) Nine Months Ended June 30,2021 Operating lease cost $ 791 Variable lease cost 213 Net lease cost $ 1,004 Lease Costs (in thousands) Nine Months Ended June 30,2020 Operating lease cost $ 780 Variable lease cost 171 Net lease cost $ 951 Future minimum payments for finance leases and operating leases with initial or remaining terms of one year or more as of June 30, 2021 were as follows: (in thousands) Operating leases Twelve months Ended: June 30, 2022 $ 886 June 30, 2023 704 June 30, 2024 641 June 30, 2025 505 June 30, 2026 507 Thereafter 4,619 Total future minimum lease payments 7,862 Amounts representing interest 1,282 Present Value of Net Future Minimum Lease Payments $ 6,580

Accounting Pronouncements (Poli

Accounting Pronouncements (Policies)	9 Months Ended
	Jun. 30, 2021
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 Financial Instruments ‒ Credit Losses (Topic 326), Derivatives and Hedging (Topic 815), and Leases (Topic 842) In August 2018, the FASB issued ASU 2018-14, Compensation – Retirement Benefits (Topic 715-20) In April 2019, the FASB issued ASU 2019-04, Codification Improvements to Topic 326, Financial Instruments – Credit Losses, Topic 815, Derivatives and Hedging Financial Instruments Financial Instruments – Credit Losses Topic 815, Derivatives and Hedging In May 2019, the FASB issued ASU 2019-05, Financial Instruments – Credit Losses, Topic 326 In November 2019, the FASB issued ASU 2019-11, Codification Improvements to Topic 326, Financial Instruments – Credit Losses In December 2019, the FASB issued ASU 2019-12, Income Taxes (Topic 740 In January 2020, the FASB issued ASU 2020-1, Investments – Equity Securities (Topic 321) In March 2020, the FASB issued ASU 2020-3 , Codification Improvements to Financial Instruments. Financial Instruments In January 2020, the FASB issued ASU 2020-4, Reference Rate Reform (Topic 848): Facilitation of the Effects of Reference Rate Reform on Financial Reporting In August 2020, the FASB issued ASU 2020-06, Debt – Debt with Conversion and Other Options (Subtopic 470-20) and Derivatives and Hedging – Contracts in Entity’s Own Equity (Subtopic 815-40) In October 2020, the FASB issued ASU 2020-08, Codification Improvements to Subtopic 310-20, Receivables – Nonrefundable Fees and Other Costs, In October 2020, the FASB issued ASU 2020-10, Codification Improvements In November 2020, the FASB issued ASU 2020-11, Financial Services – Insurance (Topic 944), effectively implement the amendments in Accounting Standards Update No. 2018-12, Financial Services— Insurance: Targeted Improvements to the Accounting for Long-Duration Contracts (LDTI). The amendments in this Update defer the effective date of LDTI for all entities by one year, as (1) for public business entities that meet the definition of an SEC filer and are not SRCs, LDTI is effective for fiscal years beginning after December 15, 2022, and interim periods within those fiscal years; and (2) for all other entities, LDTI is effective for fiscal years beginning after December 15, 2024, and interim periods within fiscal years beginning after December 15, 2025. This Update is not expected to have a significant impact on the Company’s financial statements. In January 2021, the FASB issued ASU 2021-01, Reference Rate Reform (Topic 848) 2020 amendments in this update do not apply to contract modifications made, as well as new hedging relationships entered into, after December 31, 2022, and to existing hedging relationships evaluated for effectiveness for periods after December 31, 2022, except for certain hedging relationships existing as of December 31, 2022, that apply certain optional expedients in which the accounting effects are recorded through the end of the hedging relationship. 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 2021, the FASB issued ASU 2021-03, Intangibles – Goodwill and Other (Topic 350), In May 2021, the FASB issued ASU 2021-04, Earnings Per Share (Topic 260), Debt – Modifications and Extinguishments (Subtopic 470-50), Compensation – Stock Compensation (Topic 718), and Derivatives and Hedging – Contracts in Entity’s Own Equity (Subtopic 815-40), In July 2021, the FASB issued ASU 2021-05, Leases (Topic 842

Earnings per Share (Tables)

Earnings per Share (Tables)	9 Months Ended
	Jun. 30, 2021
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 nine month periods ended June 30, 2021 and 2020. Three Months Ended Nine Months Ended June 30, June 30, June 30, June 30, 2021 2020 2021 2020 Weighted-average common shares outstanding 18,133,095 18,133,095 18,133,095 18,133,095 Average treasury stock shares (7,473,715 ) (7,076,709 ) (7,362,121 ) (6,924,021 ) Average unearned ESOP shares (692,120 ) (741,156 ) (707,250 ) (752,513 ) Average unearned non-vested shares (61,535 ) (54,735 ) (57,683 ) (50,204 ) Weighted average common shares and common stock equivalents used to calculate basic earnings per share 9,905,725 10,260,495 10,006,041 10,406,357 Additional common stock equivalents (nonvested stock) used to calculate diluted earnings per share 2,063 234 2,688 257 Weighted average common shares and common stock equivalents used to calculate diluted earnings per share 9,907,788 10,260,729 10,008,729 10,406,614

Investment Securities (Tables)

Investment Securities (Tables)	9 Months Ended
	Jun. 30, 2021
Investments Debt And Equity Securities [Abstract]
Summary of Amortized Cost, Gross Unrealized Gains and Losses, and Fair Value of Investment Securities Available for Sale	The amortized cost, gross unrealized gains and losses, and fair value of investment securities available for sale are summarized as follows (in thousands): June 30, 2021 Amortized Cost Gross Unrealized Gains Gross Unrealized Losses Fair Value Available for Sale Fannie Mae $ 28,237 $ 865 $ (30 ) $ 29,072 Freddie Mac 23,294 629 (10 ) 23,913 Governmental National Mortgage Association 7,614 206 (13 ) 7,807 Total mortgage-backed securities 59,145 1,700 (53 ) 60,792 Obligations of states and political subdivisions 17,251 545 — 17,796 U.S. government agency securities 1,998 13 — 2,011 Corporate obligations 54,695 997 (341 ) 55,351 Other debt securities 11,969 373 (122 ) 12,220 Total $ 145,058 $ 3,628 $ (516 ) $ 148,170 Held to Maturity Fannie Mae $ 10,080 $ 13 $ (8 ) $ 10,085 Freddie Mac 7,902 46 (21 ) 7,927 Total $ 17,982 $ 59 $ (29 ) $ 18,012 September 30, 2020 Amortized Cost Gross Unrealized Gains Gross Unrealized Losses Fair Value Available for Sale Fannie Mae $ 41,961 $ 1,385 $ (88 ) $ 43,258 Freddie Mac 31,642 964 (2 ) 32,604 Governmental National Mortgage Association 15,300 368 (99 ) 15,569 Total mortgage-backed securities 88,903 2,717 (189 ) 91,431 Obligations of states and political subdivisions 21,136 795 — 21,931 U.S. government agency securities 24,990 — — 24,990 U.S. government treasury securities 7,991 57 — 8,048 Corporate obligations 51,188 807 (521 ) 51,474 Other debt securities 14,265 495 (150 ) 14,610 Total $ 208,473 $ 4,871 $ (860 ) $ 212,484
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 nine months ended June 30, 2021 and 2020. (in thousands) Three Months Ended June 30, 2021 Three Months Ended June 30, 2020 Net gains recognized during the period on equity securities $ 4 $ 2 Less: Net gains recognized during the period on equity securities sold during the period — — Unrealized gains recognized during the reporting period on equity securities still held at the reporting date $ 4 $ 2 (in thousands) Nine Months Ended June 30, 2021 Nine Months Ended June 30, 2020 Net gains (losses) recognized during the period on equity securities $ 15 $ (3 ) Less: Net gains recognized during the period on equity securities sold during the period — — Unrealized gains (losses) recognized during the reporting period on equity securities still held at the reporting date $ 15 $ (3 )
Schedule of Amortized Cost and Fair Value of Debt Securities by Contractual Maturity	The amortized cost and fair value of debt securities at June 30, 2021, 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 Cost Fair Value Amortized Cost Fair Value Due in one year or less $ 1,403 $ 1,408 $ — $ — Due after one year through five years 21,050 21,428 — — Due after five years through ten years 59,260 60,237 1,955 1,961 Due after ten years 63,345 65,097 16,027 16,051 Total $ 145,058 $ 148,170 $ 17,982 $ 18,012
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 (in thousands): June 30, 2021 Number of Securities Less than Twelve Months Twelve Months or Greater Total Fair Value Gross Unrealized Losses Fair Value Gross Unrealized Losses Fair Value Gross Unrealized Losses Fannie Mae 9 $ 6,122 $ (10 ) $ 4,582 $ (28 ) $ 10,704 $ (38 ) Freddie Mac 5 3,965 (31 ) — — 3,965 (31 ) Governmental National Mortgage Association 4 409 (1 ) 1,817 (12 ) 2,226 (13 ) Corporate obligations 17 11,396 (274 ) 1,926 (67 ) 13,322 (341 ) Other debt securities 8 — — 2,453 (122 ) 2,453 (122 ) Total 43 $ 21,892 $ (316 ) $ 10,778 $ (229 ) $ 32,670 $ (545 ) September 30, 2020 Less than Twelve Months Twelve Months or Greater Total Number of Securities Fair Value Gross Unrealized Losses Fair Value Gross Unrealized Losses Fair Value Gross Unrealized Losses Fannie Mae 8 $ 1,397 $ (19 ) $ 5,827 $ (69 ) $ 7,224 $ (88 ) Freddie Mac 1 330 (2 ) — — 330 (2 ) Governmental National Mortgage Association 7 4,428 (61 ) 2,996 (38 ) 7,424 (99 ) Corporate obligations 20 13,213 (93 ) 6,573 (428 ) 19,786 (521 ) Other debt securities 10 — — 3,879 (150 ) 3,879 (150 ) Total 46 $ 19,368 $ (175 ) $ 19,275 $ (685 ) $ 38,643 $ (860 )

Loans Receivable, Net and All_2

Loans Receivable, Net and Allowance for Loan Losses (Tables)	9 Months Ended
	Jun. 30, 2021
Receivables [Abstract]
Summary of Loans Receivable	Loans receivable consist of the following (in thousands): June 30, 2021 September 30, 2020 Real estate loans: Residential $ 584,368 $ 610,172 Construction 12,236 11,853 Commercial 578,506 509,628 Commercial 95,153 139,603 Obligations of states and political subdivisions 57,070 79,230 Home equity loans and lines of credit 38,571 40,800 Auto loans 18,805 39,795 Other 1,600 2,293 1,386,309 1,433,374 Less allowance for loan losses 17,693 15,400 Net loans $ 1,368,616 $ 1,417,974
Summary of Additional Information Regarding Loans Acquired and Accounted	The following table presents additional information regarding loans acquired and accounted for in accordance with ASC 310-30 (in thousands): June 30, 2021 September 30, 2020 Acquired Loans with Specific Evidence or Deterioration in Credit Quality (ASC 310-30) Acquired Loans with Specific Evidence or Deterioration in Credit Quality (ASC 310-30) Outstanding balance $ 942 $ 1,086 Carrying amount $ 880 $ 1,025
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 Evaluated for Impairment Loans Acquired with Deteriorated Credit Quality Collectively Evaluated for Impairment June 30, 2021 Real estate loans: Residential $ 584,368 $ 2,493 $ — $ 581,875 Construction 12,236 — — 12,236 Commercial 578,506 11,330 880 566,296 Commercial 95,153 5,320 — 89,833 Obligations of states and political subdivisions 57,070 — — 57,070 Home equity loans and lines of credit 38,571 92 — 38,479 Auto loans 18,805 73 — 18,732 Other 1,600 9 — 1,591 Total $ 1,386,309 $ 19,317 $ 880 $ 1,366,112 Total Loans Individually Evaluated for Impairment Loans Acquired with Deteriorated Credit Quality Collectively Evaluated for Impairment September 30, 2020 Real estate loans: Residential $ 610,172 $ 3,949 $ — $ 606,223 Construction 11,853 — — 11,853 Commercial 509,628 11,322 1,025 497,281 Commercial 139,603 1,595 — 138,008 Obligations of states and political sub divisions 79,230 — — 79,230 Home equity loans and lines of credit 40,800 117 — 40,683 Auto loans 39,795 210 — 39,585 Other 2,293 11 — 2,282 Total $ 1,433,374 $ 17,204 $ 1,025 $ 1,415,145
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 Investment Unpaid Principal Balance Associated Allowance June 30, 2021 With no specific allowance recorded: Real estate loans Residential $ 2,384 $ 3,587 $ — Construction — — — Commercial 10,929 12,922 — Commercial 676 910 — Obligations of states and political subdivisions — — — Home equity loans and lines of credit 92 180 — Auto loans 73 99 — Other 9 21 — Total 14,163 17,719 — With an allowance recorded: Real estate loans Residential 109 113 18 Construction — — — Commercial 401 415 21 Commercial 4,644 4,686 848 Obligations of states and political subdivisions — — — Home equity loans and lines of credit — — — Auto loans — — — Other — — — Total 5,154 5,214 887 Total: Real estate loans Residential 2,493 3,700 18 Construction — — — Commercial 11,330 13,337 21 Commercial 5,320 5,596 848 Obligations of states and political subdivisions — — Home equity loans and lines of credit 92 180 — Auto loans 73 99 — Other 9 21 — Total Impaired Loans $ 19,317 $ 22,933 $ 887 Recorded Investment Unpaid Principal Balance Associated Allowance September 30, 2020 With no specific allowance recorded: Real Estate Loans Residential $ 3,699 $ 5,070 $ — Construction — — — Commercial 4,203 6,342 — Commercial 1,539 1,625 — Obligations of states and political subdivisions — — — Home equity loans and lines of credit 117 222 — Auto Loans 72 131 — Other 11 22 — Total 9,641 13,412 — With an allowance recorded: Real Estate Loans Residential 250 271 26 Construction — — — Commercial 7,119 7,169 132 Commercial 56 57 20 Obligations of states and political subdivisions — — — Home equity loans and lines of credit — — — Auto Loans 138 143 43 Other — — — Total 7,563 7,640 221 Total: Real Estate Loans Residential 3,949 5,341 26 Construction — — — Commercial 11,322 13,511 132 Commercial 1,595 1,682 20 Obligations of states and political subdivisions — — Home equity loans and lines of credit 117 222 — Auto Loans 210 274 43 Other 11 22 — Total Impaired Loans $ 17,204 $ 21,052 $ 221 The following table 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 June 30, 2021 2020 2021 2020 Average Recorded Investment Average Recorded Investment Interest Income Recognized Interest Income Recognized With no specific allowance recorded: Real estate loans Residential $ 1,107 $ 3,602 $ 2 $ 1 Construction — — — — Commercial 7,422 5,108 6 — Commercial 1,946 2,323 — — Obligations of states and political subdivisions — — — — Home equity loans and lines of credit 90 244 — — Auto loans 50 74 — 1 Other 10 13 — — Total 10,625 11,364 8 2 With an allowance recorded: Real estate loans Residential 146 361 — — Construction — — — — Commercial 4,985 182 — — Commercial 4,903 168 — — Obligations of states and political subdivisions — — — — Home equity loans and lines of credit — 6 — — Auto loans 12 85 — — Other — — — — Total 10,046 802 — — Total: Real estate loans Residential 1,253 3,963 2 1 Construction — — — — Commercial 12,407 5,290 6 — Commercial 6,849 2,491 — Obligations of states and political subdivisions — — — — Home equity loans and lines of credit 90 250 — — Auto loans 62 159 — 1 Other 10 13 — — Total Impaired Loans $ 20,671 $ 12,166 $ 8 $ 2 For the Nine Months Ended June 30, 2021 2020 2021 2020 Average Recorded Investment Average Recorded Investment Interest Income Recognized Interest Income Recognized With no specific allowance recorded: Real estate loans Residential $ 1,304 $ 3,800 $ 3 $ 2 Construction — — — — Commercial 8,408 3,203 11 1 Commercial 1,569 1,260 — 4 Obligations of states and political subdivisions — — — — Home equity loans and lines of credit 98 253 — — Auto loans 52 130 — 1 Other 11 14 — — Total 11,442 8,660 14 8 With an allowance recorded: Real estate loans Residential 171 304 — — Construction — — — — Commercial 4,908 239 — — Commercial 2,222 97 — — Obligations of states and political subdivisions — — — — Home equity loans and lines of credit — 2 — — Auto loans 28 128 1 — Other — 8 — — Total 7,329 778 1 — Total: Real estate loans Residential 1,475 4,104 3 2 Construction — — — — Commercial 13,316 3,442 11 1 Commercial 3,791 1,357 4 Obligations of states and political subdivisions — — — — Home equity loans and lines of credit 98 255 — — Auto loans 80 258 1 1 Other 11 22 — — Total Impaired Loans $ 18,771 $ 9,438 $ 15 $ 8
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 June 30, 2021 and September 30, 2020 (in thousands): Pass Special Mention Substandard Doubtful or Loss Total June 30, 2021 Commercial real estate loans $ 539,774 $ 16,422 $ 22,310 $ — $ 578,506 Commercial 89,317 159 5,677 — 95,153 Obligations of states and political subdivisions 57,070 — — — 57,070 Total $ 686,161 $ 16,581 $ 27,987 $ — $ 730,729 Pass Special Mention Substandard Doubtful or Loss Total September 30, 2020 Commercial real estate loans $ 479,475 $ 15,022 $ 15,131 $ — $ 509,628 Commercial 137,860 — 1,743 — 139,603 Obligations of states and political subdivisions 79,230 — — — 79,230 Total $ 696,565 $ 15,022 $ 16,874 $ — $ 728,461
Schedule of Performing or Nonperforming Loans	The following tables present the risk ratings in the consumer categories of performing and non-performing loans at June 30, 2021 and September 30, 2020 (in thousands): Performing Non- performing Total June 30, 2021 Real estate loans: Residential $ 580,970 $ 3,398 $ 584,368 Construction 12,236 — 12,236 Home equity loans and lines of credit 38,408 163 38,571 Auto loans 18,725 80 18,805 Other 1,585 15 1,600 Total $ 651,924 $ 3,656 $ 655,580 Performing Non- performing Total September 30, 2020 Real estate loans: Residential $ 605,549 $ 4,623 $ 610,172 Construction 11,853 — 11,853 Home equity loans and lines of credit 40,581 219 40,800 Auto loans 39,572 223 39,795 Other 2,282 11 2,293 Total $ 699,837 $ 5,076 $ 704,913
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 June 30, 2021 and September 30, 2020 (in thousands): 31-60 Days 61-89 Days 90 + Days Past Due and Total Purchased Credit Impaired Total Current Past Due Past Due Accruing Non­accrual Past Due Accruing Non­accrual Loans June 30, 2021 Real estate loans: Residential $ 580,186 $ 460 $ 324 $ — $ 3,398 $ 4,182 $ — $ — $ 584,368 Construction 12,236 — — — — — — — 12,236 Commercial 565,745 — — — 11,881 11,881 227 653 578,506 Commercial 89,815 — — — 5,338 5,338 — — 95,153 Obligations of states and political subdivisions 57,070 — — — — — — — 57,070 Home equity loans and lines of credit 38,103 222 83 — 163 468 — — 38,571 Auto loans 18,495 219 11 — 80 310 — — 18,805 Other 1,585 — — — 15 15 — — 1,600 Total $ 1,363,235 $ 901 $ 418 $ — $ 20,875 $ 22,194 $ 227 $ 653 $ 1,386,309 31-60 Days 61-89 Days 90 + Days Past Due and Total Purchased Credit Impaired Total Current Past Due Past Due Accruing Non­accrual Past Due Accruing Non­accrual Loans September 30, 2020 Real estate loans: Residential $ 604,168 $ 979 $ 402 $ — $ 4,623 $ 6,004 $ — $ — $ 610,172 Construction 11,853 — — — — — — — 11,853 Commercial 494,881 1,085 — — 12,637 13,722 236 789 509,628 Commercial 137,769 6 — — 1,828 1,834 — — 139,603 Obligations of states and political subdivisions 79,230 — — — — — — — 79,230 Home equity loans and lines of credit 40,533 48 — — 219 267 — — 40,800 Auto loans 38,971 593 8 — 223 824 — — 39,795 Other 2,282 — — — 11 11 — — 2,293 Total $ 1,409,687 $ 2,711 $ 410 $ — $ 19,541 $ 22,662 $ 236 $ 789 $ 1,433,374
Summary of Changes in Primary Segments of ALL	The following table summarizes changes in the primary segments of the ALL for the three and nine months ended June 30, 2021 and 2020 (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 ALL balance at March 31, 2021 $ 4,299 $ 117 $ 8,943 $ 1,770 $ 487 $ 337 $ 439 $ 20 $ 742 $ 17,154 Charge-offs (55 ) — — (200 ) — — (18 ) — — (273 ) Recoveries 149 — 20 — — 1 42 — — 212 Provision (184 ) 39 564 88 (88 ) (17 ) (120 ) — 318 600 ALL balance at June 30, 2021 $ 4,209 $ 156 $ 9,527 $ 1,658 $ 399 $ 321 $ 343 $ 20 $ 1,060 $ 17,693 ALL balance at March 31, 2020 $ 4,330 $ 55 $ 4,563 $ 2,180 $ 359 $ 351 $ 1,104 $ 29 $ 208 $ 13,179 Charge-offs (42 ) — (4 ) — — (21 ) (135 ) (15 ) — (217 ) Recoveries 1 — 17 — — 1 49 — — 68 Provision 78 48 2,294 (1,206 ) 185 5 (55 ) 10 (59 ) 1,300 ALL balance at June 30, 2020 $ 4,367 $ 103 $ 6,870 $ 974 $ 544 $ 336 $ 963 $ 24 $ 149 $ 14,330 ALL balance at September 30, 2020 $ 4,301 $ 127 $ 7,209 $ 874 $ 555 $ 337 $ 780 $ 25 $ 1,192 $ 15,400 Charge-offs (59 ) — (76 ) (209 ) — (8 ) (244 ) (1 ) — (597 ) Recoveries 213 — 56 — — 4 217 — — 490 Provision (246 ) 29 2,338 993 (156 ) (12 ) (410 ) (4 ) (132 ) 2,400 ALL balance at June 30, 2021 $ 4,209 $ 156 $ 9,527 $ 1,658 $ 399 $ 321 $ 343 $ 20 $ 1,060 $ 17,693 ALL balance at September 30, 2019 $ 4,243 $ 53 $ 3,806 $ 1,870 $ 343 $ 329 $ 1,384 $ 28 $ 574 $ 12,630 Charge-offs (72 ) — (54 ) — — (61 ) (717 ) (20 ) — (924 ) Recoveries 7 — 77 1 — 4 358 2 — 449 Provision 189 50 3,041 (897 ) 201 64 (62 ) 14 (425 ) 2,175 ALL balance at June 30, 2020 $ 4,367 $ 103 $ 6,870 $ 974 $ 544 $ 336 $ 963 $ 24 $ 149 $ 14,330 During the three months ended June 30, 2021, 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. Provision expense was also recorded for possible loan losses due to the economic slowdown caused by COVID-19 restrictions. 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. During the three months ended June 30, 2020 the Company recorded provision expense for the residential real estate loans, commercial real estate loans, obligations of states and political subdivisions, construction loans, home equity loans and lines of credit and other loan segments, due to either increased loan balances, changes in the loan mix within the pool, and/or charge-off activity in those segments. Provision expense was also recorded for possible loan losses due to the economic slowdown caused by COVID-19 restrictions. Credit provisions were recorded for loan loss for the commercial loans and auto loan segments. During the nine months ended June 30, 2021, the Company recorded provision expense for the construction real estate loans, commercial real estate loans and commercial loans, due to either increased loan balances, changes in the loan mix within the pool, and/or charge-off activity in those segments. Provision expense was also recorded for possible loan losses due to the economic slowdown caused by COVID-19 restrictions. 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 segments, auto loan and other loan segments. During the nine months ended June 30, 2020 the Company recorded provision expense for the residential real estate loans, commercial real estate loans, obligations of states and political subdivisions, construction loans, home equity loans and lines of credit and other loan segments, due to either increased loan balances, changes in the loan mix within the pool, and/or charge-off activity in those segments. Provision expense was also recorded for possible loan losses due to the economic slowdown caused by COVID-19 restrictions. Credit provisions were recorded for loan loss for the commercial loans and auto loan segments. The Company is closely monitoring all customer credit positions, particularly loans requesting payment relief. Such loans, as of June 30, 2021, amounted to approximately 2.3% of total loans outstanding, including $29.8 million in commercial real estate loans, $481,000 in commercial loans and $1.1 million in mortgage loans. As the economic impact of the COVID-19 pandemic continues to evolve, our customers may experience decreased cash flows, which may correlate to an inability to make timely loan payments. This, in turn, may require further increases in our allowance for loan losses and increases in the level of charge-offs in our loan portfolio. 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 June 30, 2021 and September 30, 2020 (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 evaluated for impairment $ 18 $ — $ 21 $ 848 $ — $ — $ — $ — $ — $ 887 Collectively evaluated for impairment 4,191 156 9,506 810 399 321 343 20 1,060 16,806 ALL balance at June 30, 2021 $ 4,209 $ 156 $ 9,527 $ 1,658 $ 399 $ 321 $ 343 $ 20 $ 1,060 $ 17,693 Individually evaluated for impairment $ 26 $ — $ 132 $ 20 $ — $ — $ 43 $ — $ — $ 221 Collectively evaluated for impairment 4,275 127 7,077 854 555 337 737 25 1,192 15,179 ALL balance at September 30, 2020 $ 4,301 $ 127 $ 7,209 $ 874 $ 555 $ 337 $ 780 $ 25 $ 1,192 $ 15,400
Summary of Troubled Debt Restructuring Granted	The following is a summary of troubled debt restructuring granted during the three months ended June 30, 2021 (dollars in thousands): For the Three Months Ended June 30, 2021 Number of Contracts Pre-Modification Outstanding Recorded Investment Post-Modification Outstanding Recorded Investment Troubled Debt Restructurings Real estate loans: Residential 1 $ 343 $ 343 Construction — — — Commercial 4 7,353 7,353 Commercial — — — Obligations of states and political subdivisions — — — Home equity loans and lines of credit — — — Auto loans — — — Other — — — Total $ 5 $ 7,696 $ 7,696 The following is a summary of troubled debt restructuring granted during the nine months ended June 30, 2021 and 2020 (dollars in thousands): For the Nine Months Ended June 30, 2021 Number of Contracts Pre-Modification Outstanding Recorded Investment Post-Modification Outstanding Recorded Investment Troubled Debt Restructurings Real estate loans: Residential 2 $ 416 $ 416 Construction — — — Commercial 4 7,353 7,353 Commercial — — — Obligations of states and political subdivisions — — — Home equity loans and lines of credit — — — Auto loans — — — Other — — — Total 6 $ 7,769 $ 7,769 For the Nine Months Ended June 30, 2020 Number of Contracts Pre-Modification Outstanding Recorded Investment Post-Modification Outstanding Recorded Investment Troubled Debt Restructurings Real estate loans: Residential 1 $ 534 $ 534 Construction — — — Commercial — — — Commercial — — — Obligations of states and political subdivisions — — — Home equity loans and lines of credit — — — Auto loans — — — Other — — — Total 1 $ 534 $ 534

Deposits (Tables)

Deposits (Tables)	9 Months Ended
	Jun. 30, 2021
Deposits Liabilities Disclosures [Abstract]
Schedule of Deposits by Major Classifications	Deposits consist of the following major classifications (in thousands): June 30, 2021 September 30, 2020 Non-interest bearing demand accounts $ 277,814 $ 242,642 Interest bearing demand accounts 473,119 274,722 Money market accounts 410,310 401,863 Savings and club accounts 187,573 160,975 Certificates of deposit 241,256 463,494 Total $ 1,590,072 $ 1,543,696

Net Periodic Benefit Cost-Def_2

Net Periodic Benefit Cost-Defined Benefit Plan (Tables)	9 Months Ended
	Jun. 30, 2021
Compensation And Retirement Disclosure [Abstract]
Summary of the Components of Net Periodic Benefit Cost	The following table comprises the components of net periodic benefit cost for the three and nine-month periods ended June 30, 2021 and 2020 (in thousands): For the Three Months Ended June 30, For the Nine Months Ended June 30, 2021 2020 2021 2020 Service Cost $ — $ — $ — $ — Interest Cost 112 121 338 364 Expected return on plan assets (289 ) (268 ) (867 ) (807 ) Amortization of net loss from earlier periods 56 — 166 — Net periodic benefit cost $ (121 ) $ (147 ) $ (363 ) $ (443 )

Equity Incentive Plan (Tables)

Equity Incentive Plan (Tables)	9 Months Ended
	Jun. 30, 2021
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 June 30, 2021, and changes therein during the nine month period then ended: Number of Restricted Weighted- average Grant Date Fair Value Nonvested at September 30, 2020 35,245 $ 16.15 Granted 43,939 12.56 Vested (10,834 ) 14.75 Forfeited — — Nonvested at June 30, 2021 68,350 $ 14.06

Fair Value (Tables)

Fair Value (Tables)	9 Months Ended
	Jun. 30, 2021
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 June 30, 2021 and September 30, 2020 by level within the fair value hierarchy (in thousands). Recurring Fair Value Measurements at Reporting Date June 30, 2021 Assets Level I Level II Level III Total Investment securities available for sale: Mortgage backed securities $ — $ 60,792 $ — $ 60,792 Obligations of states and political subdivisions — 17,796 — 17,796 U.S. government agencies — 2,011 — 2,011 Corporate obligations — 42,071 13,280 55,351 Other debt securities — 12,220 — 12,220 Total debt securities $ — $ 134,890 $ 13,280 $ 148,170 Equity securities- financial services 32 — — 32 Derivatives and hedging activities — 2,358 — 2,358 Liabilities Derivatives and hedging activities — 1,763 — 1,763 September 30, 2020 Assets Level I Level II Level III Total Investment securities available for sale: Mortgage backed securities $ — $ 91,431 $ — $ 91,431 Obligations of states and political subdivisions — 21,931 — 21,931 U.S. government treasury securities — 24,990 — 24,990 U.S. government agencies — 8,048 — 8,048 Corporate obligations — 43,214 8,260 51,474 Other debt securities — 14,610 — 14,610 Total debt securities $ — $ 204,224 $ 8,260 $ 212,484 Equity securities-financial services 17 — — 17 Derivatives and hedging activities — 2,192 — 2,192 Liabilities: Derivatives and hedging activities — 7,002 — 7,002
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 nine month periods ended June 30, 2021 and 2020 (in thousands). Fair Value Measurement Using Significant Unobservable Inputs (Level III) Three Months Ended June 30, 2021 June 30, 2020 Beginning balance $ 4,678 $ 7,821 Purchases, sales, issuances, settlements, net 8,541 (1,000 ) Total unrealized gain (loss): Included in earnings — — Included in other comprehensive income (loss) 61 (34 ) Transfers in and/or out of Level III — — $ 13,280 $ 6,787 Fair Value Measurement Using Significant Unobservable Inputs (Level III) Nine Months Ended June 30, 2021 June 30, 2020 Beginning balance $ 8,260 $ 7,792 Purchases, sales, issuances, settlements, net 4,791 (1,000 ) Total unrealized gain (loss): Included in earnings — — Included in other comprehensive (loss) income 229 (5 ) Transfers in and/or out of Level III — — $ 13,280 $ 6,787
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 June 30, 2021 and September 30, 2020 by level within the fair value hierarchy: Non-Recurring Fair Value Measurements at Reporting Date (in thousands) June 30, 2021 Level I Level II Level III Total Foreclosed real estate $ — $ — $ 373 $ 373 Impaired loans — — 18,430 18,430 September 30, 2020 Level I Level II Level III Total Foreclosed real estate $ — $ — $ 269 $ 269 Impaired loans — — 16,983 16,983
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 Estimate Valuation Techniques Unobservable Input Range June 30, 2021 Impaired loans $ 18,430 Appraisal of collateral (1) Appraisal adjustments (2) 0% to 35% (21.1%) Foreclosed real estate owned 373 Appraisal of collateral (1) Appraisal adjustments (2) 20% to 35% (29.8%) Quantitative Information about Level 3 Fair Value Measurements (dollars in thousands) Fair Value Estimate Valuation Techniques Unobservable Input Range September 30, 2020 Impaired loans $ 16,983 Appraisal of collateral (1) Appraisal adjustments (2) 0% to 35% (20.5%) Foreclosed real estate owned 269 Appraisal of collateral (1) Appraisal adjustments (2) 20% to 35% (25.7%) (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 June 30, 2021 and September 30, 2020 by level within the fair value hierarchy: June 30, 2021 (in thousands) Carrying Level I Level II Level III Total Fair Value Financial assets: Investment securities held to maturity $ 17,982 $ — $ — $ 18,012 $ 18,012 Loans receivable, net 1,368,616 — — 1,381,913 1,381,913 Mortgage servicing rights 694 — — 816 816 Financial liabilities: Deposits $ 1,590,072 $ 1,348,816 $ — $ 241,524 $ 1,590,340 September 30, 2020 (in thousands) Carrying Level I Level II Level III Total Fair Value Financial assets: Loans receivable, net $ 1,417,974 $ — $ — $ 1,426,962 $ 1,426,962 Mortgage servicing rights 393 — — 393 393 Financial liabilities: Deposits $ 1,543,696 $ 1,080,201 $ — $ 467,630 $ 1,547,831 Other borrowings 14,164 — — 17,721 17,721

Accumulated Other Comprehensi_2

Accumulated Other Comprehensive Income (Loss) (Tables)	9 Months Ended
	Jun. 30, 2021
Equity [Abstract]
Summary of Activity in Accumulated Other Comprehensive Income (Loss)	The activity in accumulated other comprehensive income (loss) for the three and nine month periods ended June 30, 2021 and 2020 is as follows (in thousands): Accumulated Other Comprehensive Income/(Loss) Defined Benefit Pension Plan Unrealized (Losses) on Securities Available for Sale Derivatives Total Balance at March 31, 2021 $ (3,519 ) $ 2,154 $ 587 $ (778 ) Other comprehensive income (loss) before reclassifications — 339 (463 ) (124 ) Amounts reclassified from accumulated other comprehensive income (loss) (44 ) (34 ) 343 265 Period change (44 ) 305 (120 ) 141 Balance at June 30, 2021 $ (3,563 ) $ 2,459 $ 467 $ (637 ) Balance at March 31, 2020 $ (1,527 ) $ 4,987 $ (2,464 ) $ 996 Other comprehensive income (loss) before reclassifications — 863 (1,859 ) (996 ) Amounts reclassified from accumulated other comprehensive income (loss) — — 85 85 Period change — 863 (1,774 ) (911 ) Balance at June 30, 2020 $ (1,527 ) $ 5,850 $ (4,238 ) $ 85 Accumulated Other Comprehensive Income/(Loss) Defined Benefit Pension Plan Unrealized Gains (Losses) on Securities Available for Sale Derivatives Total Balance at September 30, 2020 $ (3,432 ) $ 3,167 $ (3,791 ) $ (4,056 ) Other comprehensive income (loss) before reclassifications — (345 ) 2,879 2,534 Amounts reclassified from accumulated other comprehensive income (loss) (131 ) (363 ) 1,379 885 Period change (131 ) (708 ) 4,258 3,419 Balance at June 30, 2021 $ (3,563 ) $ 2,459 $ 467 $ (637 ) Balance at September 30, 2019 $ (1,527 ) $ 807 $ (560 ) $ (1,280 ) Other comprehensive income (loss) before reclassifications — 5,344 (3,717 ) 1,627 Amounts reclassified from accumulated other comprehensive income (loss) — (301 ) 39 (262 ) Period change — 5,043 (3,678 ) 1,365 Balance at June 30, 2020 $ (1,527 ) $ 5,850 $ (4,238 ) $ 85
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 nine month periods ended June 30, 2021 and 2020 (in thousands): Amount Reclassified from Accumulated Other Comprehensive Income (Loss) Details About Accumulated Other Comprehensive Income (Loss) Components Accumulated Other Comprehensive Income (Loss) for the Three Months Ended June 30, Affected Line Item in the Consolidated Statement of Operations 2021 2020 Securities available for sale Net securities gains reclassified into earnings $ 42 $ — Gain on sale of investment securities available for sale, net Related income tax expense (8 ) — Income taxes Net effect on accumulated other comprehensive income (loss) for the period 34 — Defined benefit pension plan Amortization of net gain and prior service costs 56 — Compensation and employee benefits Related income tax expense (12 ) — Income taxes Net effect on accumulated other comprehensive income (loss) for the period 44 — Derivatives and hedging activities: Interest expense, effective portion (434 ) (108 ) Interest expense Related income tax expense 91 23 Income taxes Net effect on accumulated other comprehensive income (loss) for the period (343 ) (85 ) Total reclassification for the period $ (265 ) $ (85 ) Amount Reclassified from Accumulated Other Comprehensive Income (Loss) Accumulated Other Comprehensive Income (Loss) For the Nine Months Ended June 30, Affected Line Item in the Consolidated Statement of Operations 2021 2020 Securities available for sale: Net securities gains reclassified into earnings $ 459 $ 381 Gain on sale of investment securities available for sale, net Related income tax expense (96 ) (80 ) Income taxes Net effect on accumulated other comprehensive income (loss) for the period 363 301 Net of tax Defined benefit pension plan Amortization of net (loss) gain and prior service costs 166 — Related income tax expense (35 ) — Income taxes Net effect on accumulated other comprehensive income (loss) for the period 131 — Derivative and hedging activities: Interest expense, effective portion (1,745 ) (50 ) Interest expense Related income tax expense 366 11 Income taxes Net effect on accumulated other comprehensive income (loss) for the period (1,379 ) (39 ) Total reclassification for the period $ (885 ) $ 262

Derivatives and Hedging Activit

Derivatives and Hedging Activities (Tables)	9 Months Ended
	Jun. 30, 2021
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 well as their classification on the Consolidated Balance Sheet as of June 30, 2021 and September 30, 2020 (in thousands). Fair Values of Derivative Instruments Asset Derivatives As of June 30, 2021 As of September 30, 2020 Hedged Item Notional Amount Balance Sheet Location Fair Value Notional Amount Balance Sheet Location Fair Value Brokered Deposits $ 150,000 Other Assets $ 1,171 $ - Other Assets $ — Commercial Loans 70,108 Other Assets 1,187 55,784 Other Assets 2,192 Total $ 220,108 $ 2,358 $ 55,784 $ 2,192 Fair Values of Derivative Instruments Liability Derivatives As of June 30, 2021 As of September 30, 2020 Hedged Item Notional Amount Balance Sheet Location Fair Value Notional Amount Balance Sheet Location Fair Value FHLB Advances $ - Other Liabilities $ - $ 25,000 Other Liabilities $ 700 Brokered Deposits 95,000 Other Liabilities 578 410,000 Other Liabilities 4,098 Commercial Loans 102,665 Other Liabilities 1,185 70,784 Other Liabilities 2,204 Total $ 197,665 $ 1,763 $ 505,784 $ 7,002
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 month periods ended June 30, 2021 and 2020 (in thousands). The Effect of Fair Value and Cash Flow Hedge Accounting on Accumulated Other Comprehensive Income (Loss) Derivatives in Hedging Relationships Loss Recognized in OCI on Derivative (Effective Portion) Three Months Ended June 30, Location of Gain or (Loss) Reclassified from Accumulated OCI into Income (Effective Portion) Loss Recognized in OCI on Derivative (Effective Portion) Three Months Ended June 30, Derivatives in Cash Flow Hedging Relationships 2021 2020 2021 2020 Interest Rate Products $ (156 ) $ (2,244 ) Interest expense $ (434 ) $ (108 ) Total $ (156 ) $ (2,244 ) $ (434 ) $ (108 ) Derivatives in Cash Flow Hedging Relationships Gain (Loss) Recognized in OCI on Derivative (Effective Portion) Nine Months Ended June 30, Location of Gain or (Loss) Reclassified from Accumulated OCI into Income (Effective Portion) Loss Recognized in OCI on Derivative (Effective Portion) Nine Months Ended June 30, 2021 2020 2021 2020 Interest Rate Products $ 5,390 $ (4,655 ) Interest expense $ (1,745 ) $ (50 ) Total $ 5,390 $ (4,655 ) $ (1,745 ) $ (50 )

Leases (Tables)

Leases (Tables)	9 Months Ended
	Jun. 30, 2021
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) June 30, 2021 Lease Right-of-Use Assets Classification Operating lease right-of-use assets Other assets $ 6,446 Total Lease Right-Of-Use Assets $ 6,446 (in thousands) June 30, 2021 Lease Liabilities Classification Operating lease Liabilities Other liabilities $ 6,580 Total Lease Liabilities $ 6,580 (in thousands) September 30, 2020 Lease Right-of-Use Assets Classification Operating lease right-of-use assets Other assets $ 7,082 Total Lease Right-Of-Use Assets $ 7,082 (in thousands) September 30, 2020 Lease Liabilities Classification Operating lease Liabilities Other liabilities $ 7,161 Total Lease Liabilities $ 7,161
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. For operating leases existing prior to October 1, 2019, the rate for the remaining lease term as of October 1, 2019 was used. June 30, 2021 Weighted average remaining lease term Operating leases 13.3 years Weighted average discount rate Operating leases 2.42 %
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 June 30, 2021 Operating lease cost $ 264 Variable lease cost 70 Net lease cost $ 334 Lease Costs (in thousands) Three Months Ended June 30, 2020 Operating lease cost $ 259 Variable lease cost 61 Net lease cost $ 320 Lease Costs (in thousands) Nine Months Ended June 30,2021 Operating lease cost $ 791 Variable lease cost 213 Net lease cost $ 1,004 Lease Costs (in thousands) Nine Months Ended June 30,2020 Operating lease cost $ 780 Variable lease cost 171 Net lease cost $ 951
Summary of Future Minimum Lease Payments	Future minimum payments for finance leases and operating leases with initial or remaining terms of one year or more as of June 30, 2021 were as follows: (in thousands) Operating leases Twelve months Ended: June 30, 2022 $ 886 June 30, 2023 704 June 30, 2024 641 June 30, 2025 505 June 30, 2026 507 Thereafter 4,619 Total future minimum lease payments 7,862 Amounts representing interest 1,282 Present Value of Net Future Minimum Lease Payments $ 6,580

Nature of Operations and Basi_2

Nature of Operations and Basis of Presentation - Additional Information (Detail)	Jun. 30, 2021
ESSA Advisory Services, LLC [Member]
Summary Of Significant Accounting Policies [Line Items]
Percentage ownership of wholly owned subsidiary	100.00%

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		9 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
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	(7,473,715)	(7,076,709)	(7,362,121)	(6,924,021)
Average unearned ESOP shares	(692,120)	(741,156)	(707,250)	(752,513)
Average unearned non-vested shares	(61,535)	(54,735)	(57,683)	(50,204)
Weighted average common shares and common stock equivalents used to calculate basic earnings per share	9,905,725	10,260,495	10,006,041	10,406,357
Additional common stock equivalents (nonvested stock) used to calculate diluted earnings per share	2,063	234	2,688	257
Weighted average common shares and common stock equivalents used to calculate diluted earnings per share	9,907,788	10,260,729	10,008,729	10,406,614

Earnings Per Share - Additional

Earnings Per Share - Additional Information (Detail) - Stock Option [Member] - $ / shares	9 Months Ended
	Jun. 30, 2021	Jun. 30, 2020
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Anti-dilutive securities	23,312	42,520
Average weighted price per share of anti-dilutive shares	$ 16.15	$ 16.15

Investment Securities - Summary

Investment Securities - Summary of Amortized Cost, Gross Unrealized Gains and Losses, and Fair Value of Investment Securities Available for Sale (Detail) - USD ($) $ in Thousands	Jun. 30, 2021	Sep. 30, 2020
Schedule of Available-for-sale Securities [Line Items]
Available for sale, Amortized Cost	$ 145,058	$ 208,473
Available for sale, Gross Unrealized Gains	3,628	4,871
Available for sale, Gross Unrealized Losses	(516)	(860)
Available for sale, Fair Value	148,170	212,484
Held to maturity, Amortized Cost	17,982
Held to maturity, Gross Unrealized Gains	59
Held to maturity, Gross Unrealized Losses	(29)
Held to maturity, Fair Value	18,012
Fannie Mae [Member]
Schedule of Available-for-sale Securities [Line Items]
Available for sale, Amortized Cost	28,237	41,961
Available for sale, Gross Unrealized Gains	865	1,385
Available for sale, Gross Unrealized Losses	(30)	(88)
Available for sale, Fair Value	29,072	43,258
Held to maturity, Amortized Cost	10,080
Held to maturity, Gross Unrealized Gains	13
Held to maturity, Gross Unrealized Losses	(8)
Held to maturity, Fair Value	10,085
Freddie Mac [Member]
Schedule of Available-for-sale Securities [Line Items]
Available for sale, Amortized Cost	23,294	31,642
Available for sale, Gross Unrealized Gains	629	964
Available for sale, Gross Unrealized Losses	(10)	(2)
Available for sale, Fair Value	23,913	32,604
Held to maturity, Amortized Cost	7,902
Held to maturity, Gross Unrealized Gains	46
Held to maturity, Gross Unrealized Losses	(21)
Held to maturity, Fair Value	7,927
Governmental National Mortgage Association [Member]
Schedule of Available-for-sale Securities [Line Items]
Available for sale, Amortized Cost	7,614	15,300
Available for sale, Gross Unrealized Gains	206	368
Available for sale, Gross Unrealized Losses	(13)	(99)
Available for sale, Fair Value	7,807	15,569
Mortgage-Backed Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Available for sale, Amortized Cost	59,145	88,903
Available for sale, Gross Unrealized Gains	1,700	2,717
Available for sale, Gross Unrealized Losses	(53)	(189)
Available for sale, Fair Value	60,792	91,431
Obligations of States and Political Subdivisions [Member]
Schedule of Available-for-sale Securities [Line Items]
Available for sale, Amortized Cost	17,251	21,136
Available for sale, Gross Unrealized Gains	545	795
Available for sale, Fair Value	17,796	21,931
U.S. Government Agency Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Available for sale, Amortized Cost	1,998	24,990
Available for sale, Gross Unrealized Gains	13
Available for sale, Fair Value	2,011	24,990
U.S. Government Treasury Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Available for sale, Amortized Cost		7,991
Available for sale, Gross Unrealized Gains		57
Available for sale, Fair Value		8,048
Corporate Obligations [Member]
Schedule of Available-for-sale Securities [Line Items]
Available for sale, Amortized Cost	54,695	51,188
Available for sale, Gross Unrealized Gains	997	807
Available for sale, Gross Unrealized Losses	(341)	(521)
Available for sale, Fair Value	55,351	51,474
Other Debt Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Available for sale, Amortized Cost	11,969	14,265
Available for sale, Gross Unrealized Gains	373	495
Available for sale, Gross Unrealized Losses	(122)	(150)
Available for sale, Fair Value	$ 12,220	$ 14,610

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		9 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
Investments Debt And Equity Securities [Abstract]
Net gains (losses) recognized during the period on equity securities	$ 4	$ 2	$ 15	$ (3)
Realized and unrealized gain (loss) on equity securities, net	$ 4	$ 2	$ 15	$ (3)

Investment Securities - Schedul

Investment Securities - Schedule of Amortized Cost and Fair Value of Debt Securities by Contractual Maturity (Detail) - USD ($) $ in Thousands	Jun. 30, 2021	Sep. 30, 2020
Available-for-sale Securities, Debt Maturities, Amortized Cost Basis, Fiscal Year Maturity [Abstract]
Due in one year or less, Amortized Cost	$ 1,403
Due after one year through five years, Amortized Cost	21,050
Due after five years through ten years, Amortized Cost	59,260
Due after ten years, Amortized Cost	63,345
Available for sale, Amortized Cost	145,058	$ 208,473
Available-for-sale Securities, Debt Maturities, Fair Value, Fiscal Year Maturity [Abstract]
Due in one year or less, Fair Value	1,408
Due after one year through five years, Fair Value	21,428
Due after five years through ten years, Fair Value	60,237
Due after ten years, Fair Value	65,097
Total, Fair Value	148,170	$ 212,484
Held to maturity Securities, Debt Maturities, Amortized Cost Basis, Fiscal Year Maturity [Abstract]
Due after five years through ten years, Amortized Cost	1,955
Due after ten years, Amortized Cost	16,027
Total, Amortized Cost	17,982
Held to maturity Securities, Debt Maturities, Fair Value, Fiscal Year Maturity [Abstract]
Due after five years through ten years, Fair Value	1,961
Due after ten years, Fair Value	16,051
Total, Fair Value	$ 18,012

Investment Securities - Additio

Investment Securities - Additional Information (Detail) - USD ($)	3 Months Ended		9 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
Amortized Cost And Fair Value Debt Securities [Abstract]
Realized gross gains	$ 90,000	$ 0	$ 507,000	$ 420,000
Realized gross losses	48,000	$ 0	48,000	39,000
Proceeds from the sale of investment securities	$ 9,000,000		$ 19,700,000	$ 24,000,000

Investment Securities - Sched_2

Investment Securities - Schedule of Gross Unrealized Losses and Fair Value (Detail) $ in Thousands	Jun. 30, 2021USD ($)Security	Sep. 30, 2020USD ($)Security
Schedule of Available-for-sale Securities [Line Items]
Number of Securities, Debt | Security	43	46
Fair Value, Less than Twelve Months, Debt	$ 21,892	$ 19,368
Gross Unrealized Losses, Less than Twelve Months, Debt	(316)	(175)
Fair Value, Twelve Months or Greater, Debt	10,778	19,275
Gross Unrealized Losses, Twelve Months or Greater, Debt	(229)	(685)
Fair Value Total, Debt	32,670	38,643
Gross Unrealized Losses Total, Debt	$ (545)	$ (860)
Fannie Mae [Member]
Schedule of Available-for-sale Securities [Line Items]
Number of Securities, Debt | Security	9	8
Fair Value, Less than Twelve Months, Debt	$ 6,122	$ 1,397
Gross Unrealized Losses, Less than Twelve Months, Debt	(10)	(19)
Fair Value, Twelve Months or Greater, Debt	4,582	5,827
Gross Unrealized Losses, Twelve Months or Greater, Debt	(28)	(69)
Fair Value Total, Debt	10,704	7,224
Gross Unrealized Losses Total, Debt	$ (38)	$ (88)
Freddie Mac [Member]
Schedule of Available-for-sale Securities [Line Items]
Number of Securities, Debt | Security	5	1
Fair Value, Less than Twelve Months, Debt	$ 3,965	$ 330
Gross Unrealized Losses, Less than Twelve Months, Debt	(31)	(2)
Fair Value Total, Debt	3,965	330
Gross Unrealized Losses Total, Debt	$ (31)	$ (2)
Governmental National Mortgage Association [Member]
Schedule of Available-for-sale Securities [Line Items]
Number of Securities, Debt | Security	4	7
Fair Value, Less than Twelve Months, Debt	$ 409	$ 4,428
Gross Unrealized Losses, Less than Twelve Months, Debt	(1)	(61)
Fair Value, Twelve Months or Greater, Debt	1,817	2,996
Gross Unrealized Losses, Twelve Months or Greater, Debt	(12)	(38)
Fair Value Total, Debt	2,226	7,424
Gross Unrealized Losses Total, Debt	$ (13)	$ (99)
Corporate Obligations [Member]
Schedule of Available-for-sale Securities [Line Items]
Number of Securities, Debt | Security	17	20
Fair Value, Less than Twelve Months, Debt	$ 11,396	$ 13,213
Gross Unrealized Losses, Less than Twelve Months, Debt	(274)	(93)
Fair Value, Twelve Months or Greater, Debt	1,926	6,573
Gross Unrealized Losses, Twelve Months or Greater, Debt	(67)	(428)
Fair Value Total, Debt	13,322	19,786
Gross Unrealized Losses Total, Debt	$ (341)	$ (521)
Other Debt Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Number of Securities, Debt | Security	8	10
Fair Value, Twelve Months or Greater, Debt	$ 2,453	$ 3,879
Gross Unrealized Losses, Twelve Months or Greater, Debt	(122)	(150)
Fair Value Total, Debt	2,453	3,879
Gross Unrealized Losses Total, Debt	$ (122)	$ (150)

Loans Receivable, Net and All_3

Loans Receivable, Net and Allowance for Loan Losses - Summary of Loans Receivable (Detail) - USD ($)	Jun. 30, 2021	Mar. 31, 2021	Sep. 30, 2020	Jun. 30, 2020	Mar. 31, 2020	Sep. 30, 2019
Real estate loans:
Total Loans	$ 1,386,309,000		$ 1,433,374,000
Less allowance for loan losses	17,693,000	$ 17,154,000	15,400,000	$ 14,330,000	$ 13,179,000	$ 12,630,000
Net loans	1,368,616,000		1,417,974,000
Obligations of States and Political Subdivisions [Member]
Real estate loans:
Total Loans	57,070,000		79,230,000
Less allowance for loan losses	399,000	487,000	555,000	544,000	359,000	343,000
Home Equity Loans and Lines of Credit [Member]
Real estate loans:
Total Loans	38,571,000		40,800,000
Less allowance for loan losses	321,000	337,000	337,000	336,000	351,000	329,000
Auto Loans [Member]
Real estate loans:
Total Loans	18,805,000		39,795,000
Less allowance for loan losses	343,000	439,000	780,000	963,000	1,104,000	1,384,000
Other [Member]
Real estate loans:
Total Loans	1,600,000		2,293,000
Less allowance for loan losses	20,000	20,000	25,000	24,000	29,000	28,000
Residential [Member] | Real Estate Loans [Member]
Real estate loans:
Total Loans	584,368,000		610,172,000
Less allowance for loan losses	4,209,000	4,299,000	4,301,000	4,367,000	4,330,000	4,243,000
Construction [Member] | Real Estate Loans [Member]
Real estate loans:
Total Loans	12,236,000		11,853,000
Less allowance for loan losses	156,000	117,000	127,000	103,000	55,000	53,000
Commercial [Member]
Real estate loans:
Net loans	29,800,000
Commercial [Member] | Real Estate Loans [Member]
Real estate loans:
Total Loans	578,506,000		509,628,000
Less allowance for loan losses	9,527,000	8,943,000	7,209,000	6,870,000	4,563,000	3,806,000
Commercial Loans [Member]
Real estate loans:
Total Loans	95,153,000		139,603,000
Less allowance for loan losses	1,658,000	$ 1,770,000	$ 874,000	$ 974,000	$ 2,180,000	$ 1,870,000
Net loans	$ 481,000

Loans Receivable, Net and All_4

Loans Receivable, Net and Allowance for Loan Losses - Additional Information (Detail)	3 Months Ended		9 Months Ended		12 Months Ended
	Jun. 30, 2021USD ($)Contract	Jun. 30, 2020Contract	Jun. 30, 2021USD ($)LoanContractCustomer	Jun. 30, 2020USD ($)Contract	Sep. 30, 2020USD ($)Loan
Accounts, Notes, Loans and Financing Receivable [Line Items]
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
Payment relief loan reported as percentage of loans outstanding	2.30%		2.30%
Loan, total	$ 1,368,616,000		$ 1,368,616,000		$ 1,417,974,000
Number of Contracts | Contract		0
Number of troubled debt restructuring loans granted interest rate concession | Contract	5		6	1
Troubled debt restructurings loans granted interest rate concession	$ 7,700,000		$ 7,800,000	$ 534,000
Number of troubled debt restructurings, loan modified, defaulted within one year of modification | Contract	0	0	0	0
Mortgage Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loan, total	$ 1,100,000		$ 1,100,000
Mortgage Loans [Member] | Payment Deferrals or Payments of Interest Only [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loan, total	1,100,000		$ 1,100,000
Number of customers | Customer			5
Commercial Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loan, total	481,000		$ 481,000
Commercial Loans [Member] | Payment Deferrals or Payments of Interest Only [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loan, total	30,300,000		$ 30,300,000
Number of customers | Customer			15
Commercial [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loan, total	29,800,000		$ 29,800,000
Paycheck Protection Program [Member] | Commercial Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Number of loans | Loan			442		673
Loans originated	$ 44,200,000		$ 44,200,000		$ 76,800,000
Guaranteed loans maturity period			two or five years
Paycheck Protection Program [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Proceeds from loans			$ 2,400,000

Loans Receivable, Net and All_5

Loans Receivable, Net and Allowance for Loan Losses - Summary of Additional Information Regarding Loans Acquired and Accounted (Detail) - USD ($) $ in Thousands	Jun. 30, 2021	Sep. 30, 2020
Accounts, Notes, Loans and Financing Receivable [Line Items]
Carrying amount	$ 1,386,309	$ 1,433,374
Loans Acquired with Deteriorated Credit Quality [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Outstanding balance	942	1,086
Carrying amount	$ 880	$ 1,025

Loans Receivable, Net and All_6

Loans Receivable, Net and Allowance for Loan Losses - Schedule of Loans Evaluated for Impairment (Detail) - USD ($) $ in Thousands	Jun. 30, 2021	Sep. 30, 2020
Financing Receivable, Recorded Investment [Line Items]
Total Loans	$ 1,386,309	$ 1,433,374
Individually Evaluated for Impairment	19,317	17,204
Collectively Evaluated for Impairment	1,366,112	1,415,145
Loans Acquired with Deteriorated Credit Quality [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Loans	880	1,025
Obligations of States and Political Subdivisions [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Loans	57,070	79,230
Collectively Evaluated for Impairment	57,070	79,230
Home Equity Loans and Lines of Credit [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Loans	38,571	40,800
Individually Evaluated for Impairment	92	117
Collectively Evaluated for Impairment	38,479	40,683
Auto Loans [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Loans	18,805	39,795
Individually Evaluated for Impairment	73	210
Collectively Evaluated for Impairment	18,732	39,585
Other [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Loans	1,600	2,293
Individually Evaluated for Impairment	9	11
Collectively Evaluated for Impairment	1,591	2,282
Residential [Member] | Real Estate Loans [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Loans	584,368	610,172
Individually Evaluated for Impairment	2,493	3,949
Collectively Evaluated for Impairment	581,875	606,223
Construction [Member] | Real Estate Loans [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Loans	12,236	11,853
Collectively Evaluated for Impairment	12,236	11,853
Commercial [Member] | Real Estate Loans [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Loans	578,506	509,628
Individually Evaluated for Impairment	11,330	11,322
Collectively Evaluated for Impairment	566,296	497,281
Commercial [Member] | Real Estate Loans [Member] | Loans Acquired with Deteriorated Credit Quality [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Loans	880	1,025
Commercial Loans [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Loans	95,153	139,603
Individually Evaluated for Impairment	5,320	1,595
Collectively Evaluated for Impairment	$ 89,833	$ 138,008

Loans Receivable, Net and All_7

Loans Receivable, Net and Allowance for Loan Losses - Schedule of Investment and Unpaid Principal Balances for Impaired Loans (Detail) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020	Sep. 30, 2020
Financing Receivable, Impaired [Line Items]
Recorded Investment	$ 19,317		$ 19,317		$ 17,204
Unpaid Principal Balance	22,933		22,933		21,052
Associated Allowance	887		887		221
Average Recorded Investment	20,671	$ 12,166	18,771	$ 9,438
Interest Income Recognized	8	2	15	8
With no Specific Allowance Recorded [Member]
Financing Receivable, Impaired [Line Items]
Recorded Investment	14,163		14,163		9,641
Unpaid Principal Balance	17,719		17,719		13,412
Average Recorded Investment	10,625	11,364	11,442	8,660
Interest Income Recognized	8	2	14	8
With an Allowance Recorded [Member]
Financing Receivable, Impaired [Line Items]
Recorded Investment	5,154		5,154		7,563
Unpaid Principal Balance	5,214		5,214		7,640
Associated Allowance	887		887		221
Average Recorded Investment	10,046	802	7,329	778
Interest Income Recognized			1
Home Equity Loans and Lines of Credit [Member]
Financing Receivable, Impaired [Line Items]
Recorded Investment	92		92		117
Unpaid Principal Balance	180		180		222
Average Recorded Investment	90	250	98	255
Home Equity Loans and Lines of Credit [Member] | With no Specific Allowance Recorded [Member]
Financing Receivable, Impaired [Line Items]
Recorded Investment	92		92		117
Unpaid Principal Balance	180		180		222
Average Recorded Investment	90	244	98	253
Home Equity Loans and Lines of Credit [Member] | With an Allowance Recorded [Member]
Financing Receivable, Impaired [Line Items]
Average Recorded Investment		6		2
Auto Loans [Member]
Financing Receivable, Impaired [Line Items]
Recorded Investment	73		73		210
Unpaid Principal Balance	99		99		274
Associated Allowance					43
Average Recorded Investment	62	159	80	258
Interest Income Recognized		1	1	1
Auto Loans [Member] | With no Specific Allowance Recorded [Member]
Financing Receivable, Impaired [Line Items]
Recorded Investment	73		73		72
Unpaid Principal Balance	99		99		131
Average Recorded Investment	50	74	52	130
Interest Income Recognized		1		1
Auto Loans [Member] | With an Allowance Recorded [Member]
Financing Receivable, Impaired [Line Items]
Recorded Investment					138
Unpaid Principal Balance					143
Associated Allowance					43
Average Recorded Investment	12	85	28	128
Interest Income Recognized			1
Other [Member]
Financing Receivable, Impaired [Line Items]
Recorded Investment	9		9		11
Unpaid Principal Balance	21		21		22
Average Recorded Investment	10	13	11	22
Other [Member] | With no Specific Allowance Recorded [Member]
Financing Receivable, Impaired [Line Items]
Recorded Investment	9		9		11
Unpaid Principal Balance	21		21		22
Average Recorded Investment	10	13	11	14
Other [Member] | With an Allowance Recorded [Member]
Financing Receivable, Impaired [Line Items]
Average Recorded Investment				8
Residential [Member] | Real Estate Loans [Member]
Financing Receivable, Impaired [Line Items]
Recorded Investment	2,493		2,493		3,949
Unpaid Principal Balance	3,700		3,700		5,341
Associated Allowance	18		18		26
Average Recorded Investment	1,253	3,963	1,475	4,104
Interest Income Recognized	2	1	3	2
Residential [Member] | Real Estate Loans [Member] | With no Specific Allowance Recorded [Member]
Financing Receivable, Impaired [Line Items]
Recorded Investment	2,384		2,384		3,699
Unpaid Principal Balance	3,587		3,587		5,070
Average Recorded Investment	1,107	3,602	1,304	3,800
Interest Income Recognized	2	1	3	2
Residential [Member] | Real Estate Loans [Member] | With an Allowance Recorded [Member]
Financing Receivable, Impaired [Line Items]
Recorded Investment	109		109		250
Unpaid Principal Balance	113		113		271
Associated Allowance	18		18		26
Average Recorded Investment	146	361	171	304
Commercial [Member] | Real Estate Loans [Member]
Financing Receivable, Impaired [Line Items]
Recorded Investment	11,330		11,330		11,322
Unpaid Principal Balance	13,337		13,337		13,511
Associated Allowance	21		21		132
Average Recorded Investment	12,407	5,290	13,316	3,442
Interest Income Recognized	6		11	1
Commercial [Member] | Real Estate Loans [Member] | With no Specific Allowance Recorded [Member]
Financing Receivable, Impaired [Line Items]
Recorded Investment	10,929		10,929		4,203
Unpaid Principal Balance	12,922		12,922		6,342
Average Recorded Investment	7,422	5,108	8,408	3,203
Interest Income Recognized	6		11	1
Commercial [Member] | Real Estate Loans [Member] | With an Allowance Recorded [Member]
Financing Receivable, Impaired [Line Items]
Recorded Investment	401		401		7,119
Unpaid Principal Balance	415		415		7,169
Associated Allowance	21		21		132
Average Recorded Investment	4,985	182	4,908	239
Commercial Loans [Member]
Financing Receivable, Impaired [Line Items]
Recorded Investment	5,320		5,320		1,595
Unpaid Principal Balance	5,596		5,596		1,682
Associated Allowance	848		848		20
Average Recorded Investment	6,849	2,491	3,791	1,357
Interest Income Recognized				4
Commercial Loans [Member] | With no Specific Allowance Recorded [Member]
Financing Receivable, Impaired [Line Items]
Recorded Investment	676		676		1,539
Unpaid Principal Balance	910		910		1,625
Average Recorded Investment	1,946	2,323	1,569	1,260
Interest Income Recognized				4
Commercial Loans [Member] | With an Allowance Recorded [Member]
Financing Receivable, Impaired [Line Items]
Recorded Investment	4,644		4,644		56
Unpaid Principal Balance	4,686		4,686		57
Associated Allowance	848		848		$ 20
Average Recorded Investment	$ 4,903	$ 168	$ 2,222	$ 97

Loans Receivable, Net and All_8

Loans Receivable, Net and Allowance for Loan Losses - Classes of Loan Portfolio, Internal Risk Rating System (Detail) - USD ($) $ in Thousands	Jun. 30, 2021	Sep. 30, 2020
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loan, total	$ 1,368,616	$ 1,417,974
Commercial And Municipal Portfolio Segment
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loan, total	730,729	728,461
Commercial And Municipal Portfolio Segment | Commercial [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loan, total	578,506	509,628
Commercial And Municipal Portfolio Segment | Commercial Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loan, total	95,153	139,603
Commercial And Municipal Portfolio Segment | Obligations of States and Political Subdivisions [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loan, total	57,070	79,230
Commercial And Municipal Portfolio Segment | Pass [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loan, total	686,161	696,565
Commercial And Municipal Portfolio Segment | Pass [Member] | Commercial [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loan, total	539,774	479,475
Commercial And Municipal Portfolio Segment | Pass [Member] | Commercial Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loan, total	89,317	137,860
Commercial And Municipal Portfolio Segment | Pass [Member] | Obligations of States and Political Subdivisions [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loan, total	57,070	79,230
Commercial And Municipal Portfolio Segment | Special Mention [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loan, total	16,581	15,022
Commercial And Municipal Portfolio Segment | Special Mention [Member] | Commercial [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loan, total	16,422	15,022
Commercial And Municipal Portfolio Segment | Special Mention [Member] | Commercial Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loan, total	159
Commercial And Municipal Portfolio Segment | Substandard [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loan, total	27,987	16,874
Commercial And Municipal Portfolio Segment | Substandard [Member] | Commercial [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loan, total	22,310	15,131
Commercial And Municipal Portfolio Segment | Substandard [Member] | Commercial Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loan, total	$ 5,677	$ 1,743

Loans Receivable, Net and All_9

Loans Receivable, Net and Allowance for Loan Losses - Schedule of Performing or Non-Performing Loans (Detail) - USD ($) $ in Thousands	Jun. 30, 2021	Sep. 30, 2020
Financing Receivable, Recorded Investment [Line Items]
Total	$ 1,368,616	$ 1,417,974
Consumer Portfolio Segment [Member]
Financing Receivable, Recorded Investment [Line Items]
Total	655,580	704,913
Home Equity Loans and Lines of Credit [Member] | Consumer Portfolio Segment [Member]
Financing Receivable, Recorded Investment [Line Items]
Total	38,571	40,800
Auto Loans [Member] | Consumer Portfolio Segment [Member]
Financing Receivable, Recorded Investment [Line Items]
Total	18,805	39,795
Other [Member] | Consumer Portfolio Segment [Member]
Financing Receivable, Recorded Investment [Line Items]
Total	1,600	2,293
Performing [Member] | Consumer Portfolio Segment [Member]
Financing Receivable, Recorded Investment [Line Items]
Total	651,924	699,837
Performing [Member] | Home Equity Loans and Lines of Credit [Member] | Consumer Portfolio Segment [Member]
Financing Receivable, Recorded Investment [Line Items]
Total	38,408	40,581
Performing [Member] | Auto Loans [Member] | Consumer Portfolio Segment [Member]
Financing Receivable, Recorded Investment [Line Items]
Total	18,725	39,572
Performing [Member] | Other [Member] | Consumer Portfolio Segment [Member]
Financing Receivable, Recorded Investment [Line Items]
Total	1,585	2,282
Non-performing [Member] | Consumer Portfolio Segment [Member]
Financing Receivable, Recorded Investment [Line Items]
Total	3,656	5,076
Non-performing [Member] | Home Equity Loans and Lines of Credit [Member] | Consumer Portfolio Segment [Member]
Financing Receivable, Recorded Investment [Line Items]
Total	163	219
Non-performing [Member] | Auto Loans [Member] | Consumer Portfolio Segment [Member]
Financing Receivable, Recorded Investment [Line Items]
Total	80	223
Non-performing [Member] | Other [Member] | Consumer Portfolio Segment [Member]
Financing Receivable, Recorded Investment [Line Items]
Total	15	11
Residential [Member] | Real Estate Loans [Member] | Consumer Portfolio Segment [Member]
Financing Receivable, Recorded Investment [Line Items]
Total	584,368	610,172
Residential [Member] | Performing [Member] | Real Estate Loans [Member] | Consumer Portfolio Segment [Member]
Financing Receivable, Recorded Investment [Line Items]
Total	580,970	605,549
Residential [Member] | Non-performing [Member] | Real Estate Loans [Member] | Consumer Portfolio Segment [Member]
Financing Receivable, Recorded Investment [Line Items]
Total	3,398	4,623
Construction [Member] | Real Estate Loans [Member] | Consumer Portfolio Segment [Member]
Financing Receivable, Recorded Investment [Line Items]
Total	12,236	11,853
Construction [Member] | Performing [Member] | Real Estate Loans [Member] | Consumer Portfolio Segment [Member]
Financing Receivable, Recorded Investment [Line Items]
Total	$ 12,236	$ 11,853

Loans Receivable, Net and Al_10

Loans Receivable, Net and Allowance for Loan Losses - Classes of Loan Portfolio Summarized by Aging Categories (Detail) - USD ($) $ in Thousands	Jun. 30, 2021	Sep. 30, 2020
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current	$ 1,363,235	$ 1,409,687
31-60 Days Past Due	901	2,711
61-89 Days Past Due	418	410
Non-accrual	20,875	19,541
Total Past Due	22,194	22,662
Purchased Credit Impaired, Accruing	227	236
Purchased Credit Impaired, Nonaccrual	653	789
Total Loans	1,386,309	1,433,374
Obligations of States and Political Subdivisions [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current	57,070	79,230
Total Loans	57,070	79,230
Home Equity Loans and Lines of Credit [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current	38,103	40,533
31-60 Days Past Due	222	48
61-89 Days Past Due	83
Non-accrual	163	219
Total Past Due	468	267
Total Loans	38,571	40,800
Auto Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current	18,495	38,971
31-60 Days Past Due	219	593
61-89 Days Past Due	11	8
Non-accrual	80	223
Total Past Due	310	824
Total Loans	18,805	39,795
Other [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current	1,585	2,282
Non-accrual	15	11
Total Past Due	15	11
Total Loans	1,600	2,293
Residential [Member] | Real Estate Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current	580,186	604,168
31-60 Days Past Due	460	979
61-89 Days Past Due	324	402
Non-accrual	3,398	4,623
Total Past Due	4,182	6,004
Total Loans	584,368	610,172
Construction [Member] | Real Estate Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current	12,236	11,853
Total Loans	12,236	11,853
Commercial [Member] | Real Estate Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current	565,745	494,881
31-60 Days Past Due		1,085
Non-accrual	11,881	12,637
Total Past Due	11,881	13,722
Purchased Credit Impaired, Accruing	227	236
Purchased Credit Impaired, Nonaccrual	653	789
Total Loans	578,506	509,628
Commercial Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current	89,815	137,769
31-60 Days Past Due		6
Non-accrual	5,338	1,828
Total Past Due	5,338	1,834
Total Loans	$ 95,153	$ 139,603

Loans Receivable, Net and Al_11

Loans Receivable, Net and Allowance for Loan Losses - Summary of Changes in Primary Segments of ALL (Detail) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020	Sep. 30, 2020
Financing Receivable, Allowance for Credit Losses [Line Items]
Balance, Beginning of period	$ 17,154	$ 13,179	$ 15,400	$ 12,630
Charge-offs	(273)	(217)	(597)	(924)
Recoveries	212	68	490	449
Provision	600	1,300	2,400	2,175
Balance, End of period	17,693	14,330	17,693	14,330
Individually evaluated for impairment	887		887		$ 221
Collectively evaluated for impairment	16,806		16,806		15,179
Commercial Loans [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Balance, Beginning of period	1,770	2,180	874	1,870
Charge-offs	(200)		(209)
Recoveries				1
Provision	88	(1,206)	993	(897)
Balance, End of period	1,658	974	1,658	974
Individually evaluated for impairment	848		848		20
Collectively evaluated for impairment	810		810		854
Unallocated [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Balance, Beginning of period	742	208	1,192	574
Provision	318	(59)	(132)	(425)
Balance, End of period	1,060	149	1,060	149
Collectively evaluated for impairment	1,060		1,060		1,192
Real Estate Loans [Member] | Residential [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Balance, Beginning of period	4,299	4,330	4,301	4,243
Charge-offs	(55)	(42)	(59)	(72)
Recoveries	149	1	213	7
Provision	(184)	78	(246)	189
Balance, End of period	4,209	4,367	4,209	4,367
Individually evaluated for impairment	18		18		26
Collectively evaluated for impairment	4,191		4,191		4,275
Real Estate Loans [Member] | Construction [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Balance, Beginning of period	117	55	127	53
Provision	39	48	29	50
Balance, End of period	156	103	156	103
Collectively evaluated for impairment	156		156		127
Real Estate Loans [Member] | Commercial [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Balance, Beginning of period	8,943	4,563	7,209	3,806
Charge-offs		(4)	(76)	(54)
Recoveries	20	17	56	77
Provision	564	2,294	2,338	3,041
Balance, End of period	9,527	6,870	9,527	6,870
Individually evaluated for impairment	21		21		132
Collectively evaluated for impairment	9,506		9,506		7,077
Obligations of States and Political Subdivisions [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Balance, Beginning of period	487	359	555	343
Provision	(88)	185	(156)	201
Balance, End of period	399	544	399	544
Collectively evaluated for impairment	399		399		555
Home Equity Loans and Lines of Credit [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Balance, Beginning of period	337	351	337	329
Charge-offs		(21)	(8)	(61)
Recoveries	1	1	4	4
Provision	(17)	5	(12)	64
Balance, End of period	321	336	321	336
Collectively evaluated for impairment	321		321		337
Auto Loans [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Balance, Beginning of period	439	1,104	780	1,384
Charge-offs	(18)	(135)	(244)	(717)
Recoveries	42	49	217	358
Provision	(120)	(55)	(410)	(62)
Balance, End of period	343	963	343	963
Individually evaluated for impairment					43
Collectively evaluated for impairment	343		343		737
Other [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Balance, Beginning of period	20	29	25	28
Charge-offs		(15)	(1)	(20)
Recoveries				2
Provision		10	(4)	14
Balance, End of period	20	$ 24	20	$ 24
Collectively evaluated for impairment	$ 20		$ 20		$ 25

Loans Receivable, Net and Al_12

Loans Receivable, Net and Allowance for Loan Losses - Summary of Troubled Debt Restructuring Granted (Detail) $ in Thousands	3 Months Ended		9 Months Ended
	Jun. 30, 2021USD ($)Contract	Jun. 30, 2020Contract	Jun. 30, 2021USD ($)Contract	Jun. 30, 2020USD ($)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	1		2	1
Pre-Modification Outstanding Recorded Investment	$ 343		$ 416	$ 534
Post-Modification Outstanding Recorded Investment	$ 343		$ 416	$ 534
Real Estate Loans [Member] | Commercial [Member]
Financing Receivable, Modifications [Line Items]
Number of Contracts | Contract	4		4
Pre-Modification Outstanding Recorded Investment	$ 7,353		$ 7,353
Post-Modification Outstanding Recorded Investment	$ 7,353		$ 7,353
Troubled Debt Restructurings [Member]
Financing Receivable, Modifications [Line Items]
Number of Contracts | Contract	5		6	1
Pre-Modification Outstanding Recorded Investment	$ 7,696		$ 7,769	$ 534
Post-Modification Outstanding Recorded Investment	$ 7,696		$ 7,769	$ 534

Deposits - Schedule of Deposits

Deposits - Schedule of Deposits by Major Classifications (Detail) - USD ($) $ in Thousands	Jun. 30, 2021	Sep. 30, 2020
Deposits Liabilities Disclosures [Abstract]
Non-interest bearing demand accounts	$ 277,814	$ 242,642
Interest bearing demand accounts	473,119	274,722
Money market accounts	410,310	401,863
Savings and club accounts	187,573	160,975
Certificates of deposit	241,256	463,494
Total	$ 1,590,072	$ 1,543,696

Net Periodic Benefit Cost-Def_3

Net Periodic Benefit Cost-Defined Benefit Plan - Summary of the Components of Net Periodic Benefit Cost (Detail) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
Compensation Related Costs [Abstract]
Interest Cost	$ 112	$ 121	$ 338	$ 364
Expected return on plan assets	(289)	(268)	(867)	(807)
Amortization of net loss from earlier periods	56		166
Net periodic benefit cost	$ (121)	$ (147)	$ (363)	$ (443)

Equity Incentive Plan - Additio

Equity Incentive Plan - Additional Information (Detail) - USD ($)	Mar. 02, 2016	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
Compensation Related Costs Disclosure [Line Items]
Share-based compensation expense				$ 421,000	$ 415,000
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		$ 95,000	$ 82,000	$ 421,000	$ 415,000
Expected future expense				$ 679,000
Remaining vesting periods				3 years 3 months
Restricted Stock [Member] | Minimum [Member]
Compensation Related Costs Disclosure [Line Items]
Restricted shares vesting period				3 months
Restricted Stock [Member] | Maximum [Member]
Compensation Related Costs Disclosure [Line Items]
Restricted shares vesting period				39 months

Equity Incentive Plan - Schedul

Equity Incentive Plan - Schedule of Restricted Stock Option Activity (Detail) - Restricted Stock [Member]	9 Months Ended
	Jun. 30, 2021$ / sharesshares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of Restricted Stock, Nonvested at September 30, 2020 | shares	35,245
Number of Restricted Stock, Granted | shares	43,939
Number of Restricted Stock, Vested | shares	(10,834)
Number of Restricted Stock, Nonvested at June 30, 2021 | shares	68,350
Weighted-average Grant Date Fair Value, Nonvested at September 30, 2020 | $ / shares	$ 16.15
Weighted-average Grant Date Fair Value, Granted | $ / shares	12.56
Weighted-average Grant Date Fair Value, Vested | $ / shares	14.75
Weighted-average Grant Date Fair Value, Nonvested at June 30, 2021 | $ / shares	$ 14.06

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	Jun. 30, 2021	Sep. 30, 2020
Assets
Total debt securities	$ 148,170	$ 212,484
Fair Value, Measurements, Recurring [Member]
Assets
Total debt securities	148,170	212,484
Equity securities- financial services	32	17
Derivatives and hedging activities	2,358	2,192
Liabilities
Derivatives and hedging activities	1,763	7,002
Fair Value, Measurements, Recurring [Member] | Mortgage-Backed Securities [Member]
Assets
Total debt securities	60,792	91,431
Fair Value, Measurements, Recurring [Member] | Obligations of States and Political Subdivisions [Member]
Assets
Total debt securities	17,796	21,931
Fair Value, Measurements, Recurring [Member] | U.S. Government Agency Securities [Member]
Assets
Total debt securities	2,011	8,048
Fair Value, Measurements, Recurring [Member] | Corporate Obligations [Member]
Assets
Total debt securities	55,351	51,474
Fair Value, Measurements, Recurring [Member] | Other Debt Securities [Member]
Assets
Total debt securities	12,220	14,610
Fair Value, Measurements, Recurring [Member] | U.S. Government Treasury Securities [Member]
Assets
Total debt securities		24,990
Fair Value, Measurements, Recurring [Member] | Level I [Member]
Assets
Equity securities- financial services	32	17
Fair Value, Measurements, Recurring [Member] | Level II [Member]
Assets
Total debt securities	134,890	204,224
Derivatives and hedging activities	2,358	2,192
Liabilities
Derivatives and hedging activities	1,763	7,002
Fair Value, Measurements, Recurring [Member] | Level II [Member] | Mortgage-Backed Securities [Member]
Assets
Total debt securities	60,792	91,431
Fair Value, Measurements, Recurring [Member] | Level II [Member] | Obligations of States and Political Subdivisions [Member]
Assets
Total debt securities	17,796	21,931
Fair Value, Measurements, Recurring [Member] | Level II [Member] | U.S. Government Agency Securities [Member]
Assets
Total debt securities	2,011	8,048
Fair Value, Measurements, Recurring [Member] | Level II [Member] | Corporate Obligations [Member]
Assets
Total debt securities	42,071	43,214
Fair Value, Measurements, Recurring [Member] | Level II [Member] | Other Debt Securities [Member]
Assets
Total debt securities	12,220	14,610
Fair Value, Measurements, Recurring [Member] | Level II [Member] | U.S. Government Treasury Securities [Member]
Assets
Total debt securities		24,990
Fair Value, Measurements, Recurring [Member] | Level III [Member]
Assets
Total debt securities	13,280	8,260
Fair Value, Measurements, Recurring [Member] | Level III [Member] | Corporate Obligations [Member]
Assets
Total debt securities	$ 13,280	$ 8,260

Fair Value - Schedule of Change

Fair Value - Schedule of Changes in Fair Value of Level III Investments (Detail) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
Fair Value Disclosures [Abstract]
Beginning balance	$ 4,678	$ 7,821	$ 8,260	$ 7,792
Purchases, sales, issuances, settlements, net	8,541	(1,000)	4,791	(1,000)
Total unrealized gain (loss):
Included in other comprehensive income (loss)	61	(34)	229	(5)
Ending balance	$ 13,280	$ 6,787	$ 13,280	$ 6,787

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	Jun. 30, 2021	Sep. 30, 2020
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Foreclosed real estate	$ 373	$ 269
Fair Value, Measurements, Nonrecurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Foreclosed real estate	373	269
Impaired loans	18,430	16,983
Level III [Member] | Fair Value, Measurements, Nonrecurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Foreclosed real estate	373	269
Impaired loans	$ 18,430	$ 16,983

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	Jun. 30, 2021USD ($)	Sep. 30, 2020USD ($)
Impaired Loans [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair Value Estimate	$ 18,430	$ 16,983
Servicing Asset Valuation Technique Extensible List	essa:AppraisalOfCollateralMember	essa:AppraisalOfCollateralMember
Servicing Asset, Measurement Input [Extensible List]	essa:AppraisalAdjustmentsMember	essa:AppraisalAdjustmentsMember
Fair value input appraisal adjustments	0.211	0.205
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	$ 373	$ 269
Servicing Asset Valuation Technique Extensible List	essa:AppraisalOfCollateralMember	essa:AppraisalOfCollateralMember
Servicing Asset, Measurement Input [Extensible List]	essa:AppraisalAdjustmentsMember	essa:AppraisalAdjustmentsMember
Fair value input appraisal adjustments	0.298	0.257
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	0.20
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	0.35

Fair Value - Additional Informa

Fair Value - Additional Information (Detail) $ in Thousands	Jun. 30, 2021USD ($)Loan	Sep. 30, 2020USD ($)Loan
Fair Value Disclosures [Abstract]
Number of impaired loans | Loan	61	111
Impaired loans, carrying value	$ 19,300	$ 17,200
Impaired loans, valuation allowance	887	221
Impaired loans, net fair value	$ 18,400	$ 17,000

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	Jun. 30, 2021	Sep. 30, 2020
Financial assets:
Investment securities held to maturity	$ 18,012
Loans receivable, net	18,400	$ 17,000
Financial liabilities:
Other borrowings		14,164
Carrying Value [Member]
Financial assets:
Investment securities held to maturity	17,982
Loans receivable, net	1,368,616	1,417,974
Mortgage servicing rights	694	393
Financial liabilities:
Deposits	1,590,072	1,543,696
Other borrowings		14,164
Estimated Fair Value [Member]
Financial assets:
Investment securities held to maturity	18,012
Loans receivable, net	1,381,913	1,426,962
Mortgage servicing rights	816	393
Financial liabilities:
Deposits	1,590,340	1,547,831
Other borrowings		17,721
Estimated Fair Value [Member] | Level 1 [Member]
Financial liabilities:
Deposits	1,348,816	1,080,201
Estimated Fair Value [Member] | Level 3 [Member]
Financial assets:
Investment securities held to maturity	18,012
Loans receivable, net	1,381,913	1,426,962
Mortgage servicing rights	816	393
Financial liabilities:
Deposits	$ 241,524	467,630
Other borrowings		$ 17,721

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		9 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
Accumulated Other Comprehensive Income Loss [Line Items]
Beginning Balance	$ 198,608	$ 193,666	$ 191,397	$ 189,508
Ending Balance	199,252	193,685	199,252	193,685
Defined Benefit Pension Plan [Member]
Accumulated Other Comprehensive Income Loss [Line Items]
Beginning Balance	(3,519)	(1,527)	(3,432)	(1,527)
Amounts reclassified from accumulated other comprehensive income (loss)	(44)		(131)
Total other comprehensive income (loss)	(44)		(131)
Ending Balance	(3,563)	(1,527)	(3,563)	(1,527)
Unrealized Gains (Losses) on Securities Available for Sale [Member]
Accumulated Other Comprehensive Income Loss [Line Items]
Beginning Balance	2,154	4,987	3,167	807
Other comprehensive income (loss) before reclassifications	339	863	(345)	5,344
Amounts reclassified from accumulated other comprehensive income (loss)	(34)		(363)	(301)
Total other comprehensive income (loss)	305	863	(708)	5,043
Ending Balance	2,459	5,850	2,459	5,850
Derivatives [Member]
Accumulated Other Comprehensive Income Loss [Line Items]
Beginning Balance	587	(2,464)	(3,791)	(560)
Other comprehensive income (loss) before reclassifications	(463)	(1,859)	2,879	(3,717)
Amounts reclassified from accumulated other comprehensive income (loss)	343	85	1,379	39
Total other comprehensive income (loss)	(120)	(1,774)	4,258	(3,678)
Ending Balance	467	(4,238)	467	(4,238)
Accumulated Other Comprehensive Income/(Loss) [Member]
Accumulated Other Comprehensive Income Loss [Line Items]
Beginning Balance	(778)	996	(4,056)	(1,280)
Other comprehensive income (loss) before reclassifications	(124)	(996)	2,534	1,627
Amounts reclassified from accumulated other comprehensive income (loss)	265	85	885	(262)
Total other comprehensive income (loss)	141	(911)	3,419	1,365
Ending Balance	$ (637)	$ 85	$ (637)	$ 85

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		9 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
Schedule of Available-for-sale Securities [Line Items]
Interest expense	$ (1,251)	$ (3,653)	$ (4,883)	$ (12,952)
Income taxes	(801)	(876)	(2,506)	(2,286)
NET INCOME	4,026	3,777	12,501	10,594
Reclassification Out of Accumulated Other Comprehensive Income (Loss) [Member]
Schedule of Available-for-sale Securities [Line Items]
NET INCOME	(265)	(85)	(885)	262
Reclassification Out of Accumulated Other Comprehensive Income (Loss) [Member] | Unrealized Gains (Losses) on Securities Available for Sale [Member]
Schedule of Available-for-sale Securities [Line Items]
Gain on sale of investment securities available for sale, net	42		459	381
Income taxes	(8)		(96)	(80)
NET INCOME	34		363	301
Reclassification Out of Accumulated Other Comprehensive Income (Loss) [Member] | Derivatives [Member]
Schedule of Available-for-sale Securities [Line Items]
Interest expense	(434)	(108)	(1,745)	(50)
Income taxes	91	23	366	11
NET INCOME	(343)	$ (85)	(1,379)	$ (39)
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	56		166
Income taxes	(12)		(35)
NET INCOME	$ 44		$ 131

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 ($)	Jun. 30, 2021	Sep. 30, 2020
Other Assets [Member]
Derivatives Fair Value [Line Items]
Derivatives, Notional Amount	$ 220,108,000	$ 55,784,000
Fair Values of Derivative Instruments, Asset	2,358,000	2,192,000
Other Liabilities [Member]
Derivatives Fair Value [Line Items]
Derivatives, Notional Amount	197,665,000	505,784,000
Fair Values of Derivative Instruments, Liability	1,763,000	7,002,000
Brokered Deposits [Member] | Other Assets [Member]
Derivatives Fair Value [Line Items]
Derivatives, Notional Amount	150,000,000
Fair Values of Derivative Instruments, Asset	1,171,000
Brokered Deposits [Member] | Other Liabilities [Member]
Derivatives Fair Value [Line Items]
Derivatives, Notional Amount	95,000,000	410,000,000
Fair Values of Derivative Instruments, Liability	578,000	4,098,000
Commercial Loans [Member] | Other Assets [Member]
Derivatives Fair Value [Line Items]
Derivatives, Notional Amount	70,108,000	55,784,000
Fair Values of Derivative Instruments, Asset	1,187,000	2,192,000
Commercial Loans [Member] | Other Liabilities [Member]
Derivatives Fair Value [Line Items]
Derivatives, Notional Amount	102,665,000	70,784,000
Fair Values of Derivative Instruments, Liability	$ 1,185,000	2,204,000
FHLB Advances [Member] | Other Liabilities [Member]
Derivatives Fair Value [Line Items]
Derivatives, Notional Amount		25,000,000
Fair Values of Derivative Instruments, Liability		$ 700,000

Derivatives and Hedging Activ_3

Derivatives and Hedging Activities - Additional Information (Detail)	3 Months Ended		9 Months Ended
	Jun. 30, 2021USD ($)Contract	Jun. 30, 2020USD ($)	Jun. 30, 2021USD ($)Contract	Jun. 30, 2020USD ($)	Sep. 30, 2020USD ($)
Derivative Instruments And Hedging Activities Disclosures [Line Items]
Interest expense	$ 1,251,000	$ 3,653,000	$ 4,883,000	$ 12,952,000
Derivative liability, collateral against obligations	1,200,000		1,200,000		$ 7,500,000
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	434,000	$ 108,000	1,700,000	$ 50,000
Increase (decrease) in accrued interest payable	$ 835,000		$ 835,000
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, number of instruments | Contract	12		12
Derivative, notional principal amount	$ 245,000,000		$ 245,000,000
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	$ 173,000,000		$ 173,000,000

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		9 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
Derivative Instruments Gain Loss [Line Items]
Gain (Loss) Recognized in OCI on Derivative	$ (590)	$ (2,353)	$ 3,645	$ (4,705)
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	(156)	(2,244)	5,390	(4,655)
Gain (Loss) Reclassified from Accumulated OCI into Income	(434)	(108)	(1,745)	(50)
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	(156)	(2,244)	5,390	(4,655)
Designated as Hedging Instrument [Member] | Interest Rate Products [Member] | Cash Flow Hedges of Interest Rate Risk [Member] | Interest Expense [Member]
Derivative Instruments Gain Loss [Line Items]
Gain (Loss) Reclassified from Accumulated OCI into Income	$ (434)	$ (108)	$ (1,745)	$ (50)

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)	9 Months Ended
	Jun. 30, 2021
Lessee Lease Description [Line Items]
Lessee operating lease expiration year	2044
ASU No. 2016-02
Lessee Lease Description [Line Items]
Change in Accounting Principle, Accounting Standards Update, Adopted [true false]	true
Change in Accounting Principle, Accounting Standards Update, Adoption Date	Oct. 1, 2019

Leases - Summary of Balance She

Leases - Summary of Balance Sheet Operating Lease Right-of-Use Assets and Lease Liabilities (Detail) - USD ($) $ in Thousands	Jun. 30, 2021	Sep. 30, 2020
ASSETS
Operating lease right-of-use assets	$ 6,446	$ 7,082
Operating Lease, Right-of-Use Asset, Statement of Financial Position [Extensible List]	Other Assets [Member]	Other Assets [Member]
LIABILITIES
Operating lease Liabilities	$ 6,580	$ 7,161
Operating Lease, Liability, Statement of Financial Position [Extensible List]	Other Liabilities [Member]	Other Liabilities [Member]

Leases - Summary of Lease Term

Leases - Summary of Lease Term and Discount Rate (Detail)	Jun. 30, 2021
Weighted average remaining lease term
Operating leases	13 years 3 months 18 days
Weighted average discount rate
Operating leases	2.42%

Leases - Summary of Components

Leases - Summary of Components of Lease Cost (Detail) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
Lease Cost [Abstract]
Operating lease cost	$ 264	$ 259	$ 791	$ 780
Variable lease cost	70	61	213	171
Net lease cost	$ 334	$ 320	$ 1,004	$ 951

Leases - Summary of Future Mini

Leases - Summary of Future Minimum Lease Payments (Detail) - USD ($) $ in Thousands	Jun. 30, 2021	Sep. 30, 2020
Lease Cost [Abstract]
June 30, 2022	$ 886
June 30, 2023	704
June 30, 2024	641
June 30, 2025	505
June 30, 2026	507
Thereafter	4,619
Total future minimum lease payments	7,862
Amounts representing interest	1,282
Present Value of Net Future Minimum Lease Payments	$ 6,580	$ 7,161