ESSA Bancorp (ESSA) 10-Q 9 Feb 21 2021 Q1 Quarterly report Financial data

Document and Entity Information

Document and Entity Information - shares	3 Months Ended
	Dec. 31, 2020	Feb. 08, 2021
Cover [Abstract]
Document Type	10-Q
Amendment Flag	false
Document Period End Date	Dec. 31, 2020
Document Fiscal Year Focus	2021
Document Fiscal Period Focus	Q1
Trading Symbol	ESSA
Entity Registrant Name	ESSA Bancorp, Inc.
Entity Central Index Key	0001382230
Current Fiscal Year End Date	--12-31
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		10,820,816
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	Dec. 31, 2020	Sep. 30, 2020
ASSETS
Cash and due from banks	$ 157,574	$ 101,447
Interest-bearing deposits with other institutions	59,640	54,470
Total cash and cash equivalents	217,214	155,917
Investment securities available for sale, at fair value	174,076	212,484
Loans held for sale	623	208
Loans receivable (net of allowance for loan losses of $16,141 and $15,400)	1,375,295	1,417,974
Regulatory stock, at cost	3,641	7,344
Premises and equipment, net	14,186	14,230
Bank-owned life insurance	36,903	40,546
Foreclosed real estate	365	269
Intangible assets, net	723	791
Goodwill	13,801	13,801
Deferred income taxes	5,685	5,993
Other assets	26,306	23,958
TOTAL ASSETS	1,868,818	1,893,515
LIABILITIES
Deposits	1,630,334	1,543,696
Short-term borrowings	569	111,713
Other borrowings	14,164	14,164
Advances by borrowers for taxes and insurance	8,749	7,858
Other liabilities	20,849	24,687
TOTAL LIABILITIES	1,674,665	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; 10,820,816 and 10,876,869 outstanding at December 31, 2020 and September 30, 2020, respectively)	181	181
Additional paid in capital	181,199	181,487
Unallocated common stock held by the Employee Stock Ownership Plan (ESOP)	(7,237)	(7,350)
Retained earnings	115,645	112,612
Treasury stock, at cost; 7,312,279 and 7,256,226 shares outstanding at December 31, 2020 and September 30, 2020, respectively	(92,338)	(91,477)
Accumulated other comprehensive loss	(3,297)	(4,056)
TOTAL STOCKHOLDERS’ EQUITY	194,153	191,397
TOTAL LIABILITIES AND STOCKHOLDERS’ EQUITY	$ 1,868,818	$ 1,893,515

Consolidated Balance Sheet (U_2

Consolidated Balance Sheet (Unaudited) (Parenthetical) - USD ($) $ in Thousands	Dec. 31, 2020	Sep. 30, 2020
Statement Of Financial Position [Abstract]
Allowance for loan losses	$ 16,141	$ 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	10,820,816	10,876,869
Treasury stock, shares outstanding	7,312,279	7,256,226

Consolidated Statement of Opera

Consolidated Statement of Operations (Unaudited) - USD ($) $ in Thousands	3 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
INTEREST INCOME
Loans receivable, including fees	$ 13,760	$ 14,190
Investment securities:
Taxable	997	1,957
Exempt from federal income tax	40	48
Other investment income	115	318
Total interest income	14,912	16,513
INTEREST EXPENSE
Deposits	1,772	3,333
Short-term borrowings	189	505
Other borrowings	39	849
Total interest expense	2,000	4,687
NET INTEREST INCOME	12,912	11,826
Provision for loan losses	900	375
NET INTEREST INCOME AFTER PROVISION FOR LOAN LOSSES	12,012	11,451
NONINTEREST INCOME
Service fees on deposit accounts	789	827
Services charges and fees on loans	425	533
Loan swap fees	211
Realized and unrealized gain on equity securities	7	1
Trust and investment fees	331	318
Gain on sale of investment securities available for sale, net		221
Gain on sale of loans, net	818
Earnings on Bank-owned life insurance	343	241
Insurance commissions	168	208
Other	43	77
Total noninterest income	3,135	2,426
NONINTEREST EXPENSE
Compensation and employee benefits	6,396	6,238
Occupancy and equipment	1,067	1,067
Professional fees	533	459
Data processing	1,082	1,017
Advertising	101	116
Federal Deposit Insurance Corporation (FDIC) premiums	273	133
Gain on foreclosed real estate	(19)	(20)
Amortization of intangible assets	68	72
Other	677	681
Total noninterest expense	10,178	9,763
Income before income taxes	4,969	4,114
Income taxes	834	704
NET INCOME	$ 4,135	$ 3,410
Earnings per share
Basic	$ 0.41	$ 0.33
Diluted	0.41	0.33
Dividends per share	$ 0.11	$ 0.11

Consolidated Statement of Compr

Consolidated Statement of Comprehensive Income (Unaudited) - USD ($) $ in Thousands	3 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Statement Of Income And Comprehensive Income [Abstract]
Net income	$ 4,135	$ 3,410
Investment securities available for sale:
Unrealized holding loss	(225)	(21)
Tax effect	47	5
Reclassification of gains recognized in net income		(221)
Tax effect		46
Net of tax amount	(178)	(191)
Derivative and hedging activities adjustments:
Changes in unrealized holding gains on derivatives included in net income	516	219
Tax effect	(107)	(46)
Reclassification adjustment for losses (gains) on derivatives included in net income	667	(68)
Tax effect	(139)	14
Net of tax amount	937	119
Total other comprehensive income (loss)	759	(72)
Comprehensive income	$ 4,894	$ 3,338

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 [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	3,410					3,410
Other comprehensive income (loss)	(72)								(72)
Cash dividends declared ($0.11 for 3 months ended December 31, 2019 and $0.11 for 3 months ended December 31, 2020 per share)	$ (1,153)					(1,153)
Accounting Standards Update [Extensible List]	us-gaap:AccountingStandardsUpdate201602Member
Stock based compensation	$ 240			240
Allocation of ESOP stock	189			75	114
Allocation of treasury shares to incentive plan	(4)			(420)				416
Allocation of treasury shares to incentive plan, Shares			33,134
Purchase of common stock	(1,045)							(1,045)
Purchase of common stock, Shares			(64,100)
Ending Balance at Dec. 31, 2019	191,363		$ 181	181,056	(7,689)	105,012		(85,845)	(1,352)
Ending Balance, Shares at Dec. 31, 2019			11,290,451
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	$ 4,135					4,135
Other comprehensive income (loss)	759								759
Cash dividends declared ($0.11 for 3 months ended December 31, 2019 and $0.11 for 3 months ended December 31, 2020 per share)	(1,102)					(1,102)
Stock based compensation	232			232
Allocation of ESOP stock	143			30	113
Allocation of treasury shares to incentive plan				(550)				550
Allocation of treasury shares to incentive plan, Shares			43,647
Purchase of common stock	(1,411)							(1,411)
Purchase of common stock, Shares			(99,700)
Ending Balance at Dec. 31, 2020	$ 194,153		$ 181	$ 181,199	$ (7,237)	$ 115,645		$ (92,338)	$ (3,297)
Ending Balance, Shares at Dec. 31, 2020	10,820,816		10,820,816

Consolidated Statement of Cha_2

Consolidated Statement of Changes in Stockholders' Equity (Unaudited) (Parenthetical) - $ / shares	3 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Cash dividends declared, per share	$ 0.11	$ 0.11
Retained Earnings [Member]
Cash dividends declared, per share	$ 0.11	$ 0.11

Consolidated Statement of Cash

Consolidated Statement of Cash Flows (Unaudited) - USD ($) $ in Thousands	3 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
OPERATING ACTIVITIES
Net income	$ 4,135	$ 3,410
Adjustments to reconcile net income to net cash provided by operating activities:
Provision for loan losses	900	375
Provision for depreciation and amortization	265	263
Amortization and accretion of discounts and premiums, net	(99)	600
Net gain on sale of investment securities, available for sale		(221)
Realized and unrealized gain on equity securities	(7)	(1)
Gain on sale of loans, net	(818)
Origination of residential real estate loans for sale	(19,341)
Proceeds on sale of residential real estate loans	19,744
Compensation expense on ESOP	143	189
Amortization of right-of-use asset	220	211
Stock based compensation	232	240
Decrease (increase) in accrued interest receivable	719	(53)
Increase (decrease) in accrued interest payable	37	(5)
Earnings on bank-owned life insurance	(223)	(241)
Deferred federal income taxes	106	360
Decrease in accrued pension liability	(121)	(148)
Gain on foreclosed real estate, net	(19)	(20)
Amortization of intangible assets	68	72
Other, net	(2,013)	(128)
Net cash provided by operating activities	3,928	4,903
Investment securities available for sale:
Proceeds from sale of investment securities		13,024
Proceeds from principal repayments and maturities	48,319	13,434
Purchases	(10,476)	(26,235)
Decrease (increase) in loans receivable, net	42,058	(17,446)
Redemption of regulatory stock	4,884	3,882
Purchase of regulatory stock	(1,181)	(3,429)
Proceeds from sale of foreclosed real estate	83	111
Purchase of premises, equipment and software	(190)	(328)
Net cash provided by (used for) investing activities	83,497	(16,987)
FINANCING ACTIVITIES
Increase in deposits, net	86,638	6,534
Net decrease in short-term borrowings	(111,144)	(2,982)
Proceeds from other borrowings		13,928
Repayment of other borrowings		(16,549)
Increase in advances by borrowers for taxes and insurance	891	3,661
Purchase of common stock	(1,411)	(1,045)
Dividends on common stock	(1,102)	(1,153)
Net cash (used for) provided by financing activities	(26,128)	2,394
Increase (decrease) in cash and cash equivalents	61,297	(9,690)
CASH AND CASH EQUIVALENTS AT BEGINNING OF YEAR	155,917	52,242
CASH AND CASH EQUIVALENTS AT END OF YEAR	217,214	42,552
Cash Paid:
Interest	1,963	4,692
Income taxes		3
Noncash items:
Transfers from loans to foreclosed real estate	160	194
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 gains	$ (225)	$ (242)

Nature of Operations and Basis

Nature of Operations and Basis of Presentation	3 Months Ended
	Dec. 31, 2020
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 month periods ended December 31, 2020 and 2019 are not necessarily indicative of the results that may be expected for the year ending September 30, 2021.

Earnings per Share

Earnings per Share	3 Months Ended
	Dec. 31, 2020
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 month periods ended December 31, 2020 and 2019. Three Months Ended December 31, December 31, 2020 2019 Weighted-average common shares outstanding 18,133,095 18,133,095 Average treasury stock shares (7,279,981 ) (6,830,518 ) Average unearned ESOP shares (718,523 ) (763,787 ) Average unearned non-vested shares (63,504 ) (56,517 ) Weighted average common shares and common stock equivalents used to calculate basic earnings per share 10,071,087 10,482,273 Additional common stock equivalents (nonvested stock) used to calculate diluted earnings per share 2,820 10 Weighted average common shares and common stock equivalents used to calculate diluted earnings per share 10,073,907 10,482,283 At December 31, 2020 there were 32,107 shares of nonvested stock outstanding at an average weighted price of $16.13 per share that were not included in the computation of diluted earnings per share because to do so would have been anti-dilutive. At December 31, 2019 there were 53,257 shares of nonvested stock outstanding at an average weighted price of $16.16 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	3 Months Ended
	Dec. 31, 2020
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	3 Months Ended
	Dec. 31, 2020
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 January 2017, the FASB issued ASU 2017-04, Simplifying the Test for Goodwill Impairment 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 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 2020-09, Debt (Topic 470): Amendments to SEC Paragraphs Pursuant to SEC Release No. 33-10762 In October 2020, the FASB issued ASU 2020-10, Codification Improvements 15, 2020, for public business entities. For all other entities, the amendments are effective for annual periods beginning after December 15, 2021, and interim periods within annual periods beginning after December 15, 2022. This Update is not expected to have a significant impact on the Company’s financial statements. In November 2020, the FASB issued ASU 2020-11, Financial Services – Insurance (Topic 944), Financial Services— Insurance: Targeted Improvements to the Accounting for Long-Duration Contracts 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.

Investment Securities

Investment Securities	3 Months Ended
	Dec. 31, 2020
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): December 31, 2020 Amortized Cost Gross Unrealized Gains Gross Unrealized Losses Fair Value Available for Sale Fannie Mae $ 36,177 $ 1,205 $ (79 ) $ 37,303 Freddie Mac 27,906 893 (2 ) 28,797 Governmental National Mortgage Association 12,992 349 (54 ) 13,287 Total mortgage-backed securities 77,075 2,447 (135 ) 79,387 Obligations of states and political subdivisions 21,127 746 — 21,873 U.S. government agency securities 1,998 31 — 2,029 Corporate obligations 56,596 918 (479 ) 57,035 Other debt securities 13,494 394 (136 ) 13,752 Total $ 170,290 $ 4,536 $ (750 ) $ 174,076 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 months ended December 31, 2020 and 2019. (in thousands) Three Months Ended December 31, 2020 Three Months Ended December 31, 2019 Net gains recognized during the period on equity securities $ 7 $ 1 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 $ 7 $ 1 The amortized cost and fair value of debt securities at December 31, 2020, 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 Amortized Cost Fair Value Due in one year or less $ 3,382 $ 3,399 Due after one year through five years 28,945 29,688 Due after five years through ten years 50,959 51,586 Due after ten years 87,004 89,403 Total $ 170,290 $ 174,076 For the three months ended December 31, 2020, there were no sales of investment securities. For the three months ended December 31, 2019, the Company realized gross gains of $221,000 and no gross losses on proceeds from the sale on investment securities of $13.0 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): December 31, 2020 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 10 $ 1,513 $ (16 ) $ 5,109 $ (63 ) $ 6,622 $ (79 ) Freddie Mac 0 — — 314 (2 ) 314 (2 ) Governmental National Mortgage Association 6 1,266 (19 ) 3,067 (35 ) 4,333 (54 ) Corporate obligations 24 18,570 (175 ) 4,066 (304 ) 22,636 (479 ) Other debt securities 10 — — 3,652 (136 ) 3,652 (136 ) Total 50 $ 21,349 $ (210 ) $ 16,208 $ (540 ) $ 37,557 $ (750 ) 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 — 0 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 December 31, 2020, 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	3 Months Ended
	Dec. 31, 2020
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): December 31, 2020 September 30, 2020 Real estate loans: Residential $ 601,530 $ 610,172 Construction 11,626 11,853 Commercial 508,043 509,628 Commercial 123,376 139,603 Obligations of states and political subdivisions 72,527 79,230 Home equity loans and lines of credit 40,459 40,800 Auto loans 32,013 39,795 Other 1,862 2,293 1,391,436 1,433,374 Less allowance for loan losses 16,141 15,400 Net loans $ 1,375,295 $ 1,417,974 During 2020 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 596 loans totaling $67.5 million originated by the Company under the Payroll Protection Program during the quarter ended December 31, 2020. These loans mature in two 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): December 31, 2020 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 $ 992 $ 1,086 Carrying amount $ 931 $ 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 December 31, 2020 Real estate loans: Residential $ 601,530 $ 3,580 $ — $ 597,950 Construction 11,626 — — 11,626 Commercial 508,043 11,088 931 496,024 Commercial 123,376 1,195 — 122,181 Obligations of states and political subdivisions 72,527 — — 72,527 Home equity loans and lines of credit 40,459 96 — 40,363 Auto loans 32,013 131 — 31,882 Other 1,862 11 — 1,851 Total $ 1,391,436 $ 16,101 $ 931 $ 1,374,404 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. A loan is considered to be a troubled debt restructuring (“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 December 31, 2020 With no specific allowance recorded: Real estate loans Residential $ 3,367 $ 4,619 $ — Construction — — — Commercial 4,054 6,241 — Commercial 1,195 1,291 — Obligations of states and political subdivisions — — — Home equity loans and lines of credit 96 182 — Auto loans 63 95 — Other 11 22 — Total 8,786 12,450 — With an allowance recorded: Real estate loans Residential 213 271 21 Construction — — — Commercial 7,034 7,145 61 Commercial — — — Obligations of states and political subdivisions — — — Home equity loans and lines of credit — — — Auto loans 68 74 20 Other — — — Total 7,315 7,490 102 Total: Real estate loans Residential 3,580 4,890 21 Construction — — — Commercial 11,088 13,386 61 Commercial 1,195 1,291 — Obligations of states and political subdivisions — — — Home equity loans and lines of credit 96 182 — Auto loans 131 169 20 Other 11 22 — Total Impaired Loans $ 16,101 $ 19,940 $ 102 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 December 31, 2020 2019 2020 2019 Average Recorded Investment Average Recorded Investment Interest Income Recognized Interest Income Recognized With no specific allowance recorded: Real estate loans Residential $ 1,436 $ 3,933 $ 1 $ 1 Construction — — — — Commercial 11,131 2,398 — — Commercial 1,313 392 — — Obligations of states and political subdivisions — — — — Home equity loans and lines of credit 109 322 — — Auto loans 55 116 — 1 Other 11 19 — — Total 14,055 7,180 1 2 With an allowance recorded: Real estate loans Residential 221 297 — — Construction — — — — Commercial 2,581 333 — — Commercial 37 65 — — Obligations of states and political subdivisions — — — — Home equity loans and lines of credit — 0 — — Auto loans 40 212 — — Other — 5 — — Total 2,879 912 — — Total: Real estate loans Residential 1,657 4,230 1 1 Construction — — — — Commercial 13,712 2,731 — — Commercial 1,350 457 — — Obligations of states and political subdivisions — — — — Home equity loans and lines of credit 109 322 — — Auto loans 95 328 — 1 Other 11 24 — — Total Impaired Loans $ 16,934 $ 8,092 $ 1 $ 2 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 December 31, 2020 and September 30, 2020 (in thousands): Pass Special Mention Substandard Doubtful or Loss Total December 31, 2020 Commercial real estate loans $ 469,972 $ 18,608 $ 19,463 $ — $ 508,043 Commercial 121,932 108 1,336 — 123,376 Obligations of states and political subdivisions 72,527 — — — 72,527 Total $ 664,431 $ 18,716 $ 20,799 $ — $ 703,946 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 December 31, 2020 and September 30, 2020 (in thousands): Performing Non- performing Total December 31, 2020 Real estate loans: Residential $ 596,489 $ 5,041 $ 601,530 Construction 11,626 — 11,626 Home equity loans and lines of credit 40,262 197 40,459 Auto loans 31,873 140 32,013 Other 1,844 18 1,862 Total $ 682,094 $ 5,396 $ 687,490 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 December 31, 2020 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 December 31, 2020 Real estate loans: Residential $ 594,713 $ 1,192 $ 584 $ — $ 5,041 $ 6,817 $ — $ — $ 601,530 Construction 11,626 — — — — — — — 11,626 Commercial 485,544 8,464 105 — 12,999 21,568 233 698 508,043 Commercial 121,882 15 10 — 1,469 1,494 — — 123,376 Obligations of states and political subdivisions 72,527 — — — — — — — 72,527 Home equity loans and lines of credit 40,086 176 — — 197 373 — — 40,459 Auto loans 31,103 766 4 — 140 910 — — 32,013 Other 1,844 — — — 18 18 — — 1,862 Total $ 1,359,325 $ 10,613 $ 703 $ — $ 19,864 $ 31,180 $ 233 $ 698 $ 1,391,436 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 months ended December 31, 2020, consideration was given and a credit provision was recorded for loans granted short term payment relief 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 December 31, 2020 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 months ended December 31, 2020 and 2019 (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 September 30, 2020 $ 4,301 $ 127 $ 7,209 $ 874 $ 555 $ 337 $ 780 $ 25 $ 1,192 $ 15,400 Charge-offs — — (76 ) (9 ) — (8 ) (155 ) (1 ) — (249 ) Recoveries — — 17 — — 1 72 — — 90 Provision 206 8 712 39 (47 ) 20 (77 ) (2 ) 41 900 ALL balance at December 31, 2020 $ 4,507 $ 135 $ 7,862 $ 904 $ 508 $ 350 $ 620 $ 22 $ 1,233 $ 16,141 ALL balance at September 30, 2019 $ 4,243 $ 53 $ 3,806 $ 1,870 $ 343 $ 329 $ 1,384 $ 28 $ 574 $ 12,630 Charge-offs (22 ) — (40 ) — — (29 ) (372 ) (2 ) (465 ) Recoveries 1 — 42 1 — 1 161 1 207 Provision (61 ) 29 (204 ) 370 (3 ) 68 59 (3 ) 120 375 ALL balance at December 31, 2019 $ 4,161 $ 82 $ 3,604 $ 2,241 $ 340 $ 369 $ 1,232 $ 24 $ 694 $ 12,747 During the three months ended December 31, 2020, the Company recorded provision expense for the residential real estate loans, construction real estate loans, commercial real estate loans, commercial loans, construction loans and home equity loans and lines of credit 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 obligations of states and political subdivisions, auto loan and other loan segments. During the three months ended December 31, 2019, the Company recorded provision expense for the construction real estate loans, commercial, home equity loans and lines of credit and auto loan segments, due to either increased loan balances, changes in the loan mix within the pool, and/or charge-off activity in those segments. Credit provisions were recorded for loan loss for the residential real estate, commercial real estate, obligations of states and political subdivisions and other loan segments. The Company is closely monitoring all customer credit positions, particularly loans requesting payment relief. Such loans, as of December 31, 2020, amounted to approximately 2.3% of total loans outstanding, including $28.1 million in commercial real estate loans, $108,000 in commercial loans, $3.3 million in mortgage loans and $160,000 in auto loans. As the economic slowdown continues to evolve due to COVID-19 restrictions, 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 December 31, 2020 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 $ 21 $ — $ 61 $ — $ — $ — $ 20 $ — $ — $ 102 Collectively evaluated for impairment 4,486 135 7,801 904 508 350 600 22 1,233 16,039 ALL balance at December 31, 2020 $ 4,507 $ 135 $ 7,862 $ 904 $ 508 $ 350 $ 620 $ 22 $ 1,233 $ 16,141 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. There were no new troubled debt restructurings granted for the three months ended December 31, 2020. The following is a summary of troubled debt restructuring granted during the three months ended December 31, 2019 (dollars in thousands): For the Three Months Ended December 31, 2019 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 one new troubled debt restructuring granted for the three months ended December 31, 2019, totaled $534,000 and was granted an interest rate concession. For the three months ended December 31, 2020 and 2019, no loans defaulted on a restructuring agreement within one year of modification. As of December 31, 2020, approximately 15 of our commercial clients had requested loan payment deferrals or payments of interest only on loans totaling $28.2 million. We have had similar request from approximately 17 mortgage customers and approximately 22 auto loan customers. In accordance with interagency guidance issued in March 2020, these short-term deferrals are not considered troubled debt restructurings (“TDRs”) unless the borrower was previously experiencing financial difficulty. In addition, the risk-rating on COVID-19 modified loans did not change, and these loans will not be considered past due until after the deferral period is over and scheduled payments resume. The credit quality of these loans will be reevaluated after the deferral period ends. At December 31, 2020, our non-performing assets were not yet materially impacted by the economic pressures of COVID-19, although there can be no assurance that our non-performing assets will not increase in the future. In addition, 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	3 Months Ended
	Dec. 31, 2020
Deposits Liabilities Disclosures [Abstract]
Deposits	7. Deposits Deposits consist of the following major classifications (in thousands): December 31, 2020 September 30, 2020 Non-interest bearing demand accounts $ 256,202 $ 242,642 Interest bearing demand accounts 314,509 274,722 Money market accounts 390,173 401,863 Savings and club accounts 168,435 160,975 Certificates of deposit 501,015 463,494 Total $ 1,630,334 $ 1,543,696

Net Periodic Benefit Cost-Defin

Net Periodic Benefit Cost-Defined Benefit Plan	3 Months Ended
	Dec. 31, 2020
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 month periods ended December 31, 2020 and 2019 (in thousands): For the Three Months Ended December 31, 2020 2019 Service Cost $ — $ — Interest Cost 113 121 Expected return on plan assets (289 ) (269 ) Amortization of net loss from earlier periods 55 — Net periodic benefit cost $ (121 ) $ (148 ) 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	3 Months Ended
	Dec. 31, 2020
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 stoc k, 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 December 31, 2020 vest over periods ranging from 9 to 45 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 December 31, 2020 and 2019, the Company recorded $232,000 and $240,000 of share-based compensation expense, respectively, comprised of restricted stock expense. Expected future compensation expense relating to the restricted shares outstanding at December 31, 2020 is $867,000 over the remaining vesting period of 3.75 years. The following is a summary of the status of the Company’s restricted stock as of December 31, 2020, and changes therein during the three 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 — — Forfeited — — Nonvested at December 31, 2020 79,184 $ 14.16

Fair Value

Fair Value	3 Months Ended
	Dec. 31, 2020
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 December 31, 2020 and September 30, 2020 by level within the fair value hierarchy (in thousands). Recurring Fair Value Measurements at Reporting Date December 31, 2020 Assets Level I Level II Level III Total Investment securities available for sale: Mortgage backed securities $ — $ 79,387 $ — $ 79,387 Obligations of states and political subdivisions — 21,873 — 21,873 U.S. government agencies — 2,029 — 2,029 Corporate obligations — 51,647 5,388 57,035 Other debt securities — 13,752 — 13,752 Total debt securities $ — $ 168,688 $ 5,388 $ 174,076 Equity securities- financial services 24 — — 24 Derivatives and hedging activities — 1,694 — 1,694 Liabilities Derivatives and hedging activities — 5,315 — 5,315 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 month periods ended December 31, 2020 and 2019 (in thousands). Fair Value Measurement Using Significant Unobservable Inputs (Level III) Three Months Ended December 31, 2020 December 31, 2019 Beginning balance $ 8,260 $ 7,792 Purchases, sales, issuances, settlements, net (3,000 ) — Total unrealized gain (loss): Included in earnings — — Included in other comprehensive income (loss) 128 29 Transfers in and/or out of Level III — — $ 5,388 $ 7,821 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 December 31, 2020 and September 30, 2020 by level within the fair value hierarchy: Non-Recurring Fair Value Measurements at Reporting Date (in thousands) December 31, 2020 Level I Level II Level III Total Foreclosed real estate $ — $ — $ 160 $ 160 Impaired loans — — 7,213 7,213 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 December 31, 2020 Impaired loans $ 7,213 Appraisal of collateral (1) Appraisal adjustments (2) 0% to 35% (20.4%) Foreclosed real estate owned 160 Appraisal of collateral (1) Appraisal adjustments (2) 20% to 35% (27.9%) 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 December 31, 2020, 14 impaired loans with a carrying value of $7.3 million were reduced by specific valuation allowance totaling $102,000 resulting in a net fair value of $7.2 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 December 31, 2020 and September 30, 2020 by level within the fair value hierarchy: December 31, 2020 (in thousands) Carrying Level I Level II Level III Total Fair Value Financial assets: Loans receivable, net 1,375,295 — — 1,387,543 1,387,543 Mortgage servicing rights 511 — — 511 511 Financial liabilities: Deposits $ 1,630,334 $ 1,129,319 $ — $ 505,649 $ 1,634,968 Other borrowings 14,164 — — 15,392 15,392 September 30, 2020 (in thousands) Carrying Level I Level II Level III Total Fair Value Financial assets: Loans receivable, net 1,418,182 — — 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, 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)	3 Months Ended
	Dec. 31, 2020
Equity [Abstract]
Accumulated Other Comprehensive Income (Loss)	11. Accumulated Other Comprehensive Income (Loss) The activity in accumulated other comprehensive income (loss) for the three month periods ended December 31, 2020 and 2019 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 September 30, 2020 $ (3,432 ) $ 3,167 $ (3,791 ) $ (4,056 ) Other comprehensive income (loss) before reclassifications — (174 ) 406 232 Amounts reclassified from accumulated other comprehensive income (loss) — — 527 527 Period change — (174 ) 933 759 Balance at December 31, 2020 $ (3,432 ) $ 2,993 $ (2,858 ) $ (3,297 ) Balance at September 30, 2019 $ (1,527 ) $ 807 $ (560 ) $ (1,280 ) Other comprehensive income (loss) before reclassifications — (16 ) 173 157 Amounts reclassified from accumulated other comprehensive income (loss) — (175 ) (54 ) (229 ) Period change — (191 ) 119 (72 ) Balance at December 31, 2019 $ (1,527 ) $ 616 $ (441 ) $ (1,352 ) The following table presents significant amounts reclassified out of each component of accumulated other comprehensive income (loss) for the three month periods ended December 31, 2020 and 2019 (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 December 31, Affected Line Item in the Consolidated Statement of Income 2020 2019 Securities available for sale Net securities gains reclassified into earnings $ — $ 221 Gain on sale of investment securities available for sale, net Related income tax expense — (46 ) Income taxes Net effect on accumulated other comprehensive income (loss) for the period — 175 Derivatives and hedging activities: Interest expense, effective portion (667 ) 68 Deposits and short-term borrowings interest expense Related income tax expense 140 (14 ) Income taxes Net effect on accumulated other comprehensive income (loss) for the period (527 ) 54 Total reclassification for the period $ (527 ) $ 229

Derivative and Hedging Activiti

Derivative and Hedging Activities	3 Months Ended
	Dec. 31, 2020
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 December 31, 2020 and September 30, 2020 (in thousands). Fair Values of Derivative Instruments Asset Derivatives As of December 31, 2020 As of September 30, 2020 Hedged Item Notional Amount Balance Sheet Location Fair Value Notional Amount Balance Sheet Location Fair Value Commercial Loans $ 62,765 Other Assets $ 1,694 $ 55,784 Other Assets $ 2,192 Total $ 62,765 $ 1,694 $ 55,784 $ 2,192 Fair Values of Derivative Instruments Liability Derivatives As of December 31, 2020 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 420,000 Other Liabilities 3,616 410,000 Other Liabilities 4,098 Commercial Loans 77,716 Other Liabilities 1,699 70,784 Other Liabilities 2,204 Total $ 497,716 $ 5,315 $ 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 December 31, 2020, the Company had eighteen interest rate swaps with a notional principal amount of $420 million associated with the Company’s cash outflows associated with various brokered certificates and $78 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 December 31, 2020 and 2019. 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 December 31, 2020 and 2019, the Company had $667,000 of losses which resulted in an increase to interest expense and $68,000 of gains reclassified which resulted in a decrease to interest expense. During the next twelve months, the Company estimates that $2.0 million will be reclassified as a 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 December 31, 2020 and 2019 (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 December 31, Location of Gain or (Loss) Reclassified from Accumulated OCI into Income (Effective Portion) (Loss) Gain Recognized in OCI on Derivative (Effective Portion) Three Months Ended December 31, Derivatives in Cash Flow Hedging Relationships 2020 2019 2020 2019 Interest Rate Products $ 1,181 $ 151 Interest expense $ (667 ) $ 68 Total $ 1,181 $ 151 $ (667 ) $ 68 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 December 31, 2020, the Company had derivatives in a net liability position and was required to post $5.3 million in collateral against its obligations under these agreements. As of September 30, 2019, 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 December 31, 2020 and September 30, 2020, it could have been required to settle its obligations under the agreements at the termination value.

Contingent Liabilities

Contingent Liabilities	3 Months Ended
	Dec. 31, 2020
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. The case is currently stayed while the parties explore the possibility of a negotiated resolution to the case. In an order dated November 24, 2020, the Court referred the case to Magistrate Judge Timothy J. Sullivan to assist in mediation efforts. If these discussions are not successful, the Bank will continue to defend against such allegations. To the extent that this matter could result in exposure to the Bank, the amount of such exposures cannot currently be estimated. 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 is now fully briefed and awaiting a decision from the court. The Bank intends to defend against such allegations. To the extent that this matter could result in exposure to the Bank, the amount of such exposure cannot currently be estimated.

Revenue Recognition

Revenue Recognition	3 Months Ended
	Dec. 31, 2020
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. As a result, no changes were made during the period related to these sources of revenue, which cumulatively comprise 90.3% of the total revenue of the Corporation. 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	3 Months Ended
	Dec. 31, 2020
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) December 31, 2020 Lease Right-of-Use Assets Classification Operating lease right-of-use assets Other assets $ 6,885 Total Lease Right-Of-Use Assets $ 6,885 (in thousands) December 31, 2020 Lease Liabilities Classification Operating lease Liabilities Other liabilities $ 6,984 Total Lease Liabilities $ 6,984 (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. December 31, 2020 Weighted average remaining lease term Operating leases 13.3 years Weighted average discount rate Operating leases 2.40 % The following table represents lease costs and other lease information. As the Company elected, for all classes of underlying assets, not to separate lease and non-lease components and instead to account for them as a single lease component, the variable lease cost primarily represents variable payments such as common area maintenance and utilities. Lease Costs (in thousands) Three Months Ended December 31, 2020 Operating lease cost $ 263 Variable lease cost 64 Net lease cost $ 327 Lease Costs (in thousands) Three Months Ended December 31,2019 Operating lease cost $ 254 Variable lease cost 59 Net lease cost $ 313 Future minimum payments for finance leases and operating leases with initial or remaining terms of one year or more as of December 31, 2020 were as follows: (in thousands) Operating leases Twelve months Ended: December 31, 2021 $ 963 December 31, 2022 1,247 December 31, 2023 711 December 31, 2024 536 December 31, 2025 509 Thereafter 4,998 Total future minimum lease payments 8,964 Amounts representing interest (1,980 ) Present Value of Net Future Minimum Lease Payments $ 6,984

Accounting Pronouncements (Poli

Accounting Pronouncements (Policies)	3 Months Ended
	Dec. 31, 2020
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 January 2017, the FASB issued ASU 2017-04, Simplifying the Test for Goodwill Impairment 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 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 2020-09, Debt (Topic 470): Amendments to SEC Paragraphs Pursuant to SEC Release No. 33-10762 In October 2020, the FASB issued ASU 2020-10, Codification Improvements 15, 2020, for public business entities. For all other entities, the amendments are effective for annual periods beginning after December 15, 2021, and interim periods within annual periods beginning after December 15, 2022. This Update is not expected to have a significant impact on the Company’s financial statements. In November 2020, the FASB issued ASU 2020-11, Financial Services – Insurance (Topic 944), Financial Services— Insurance: Targeted Improvements to the Accounting for Long-Duration Contracts 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.

Earnings per Share (Tables)

Earnings per Share (Tables)	3 Months Ended
	Dec. 31, 2020
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 month periods ended December 31, 2020 and 2019. Three Months Ended December 31, December 31, 2020 2019 Weighted-average common shares outstanding 18,133,095 18,133,095 Average treasury stock shares (7,279,981 ) (6,830,518 ) Average unearned ESOP shares (718,523 ) (763,787 ) Average unearned non-vested shares (63,504 ) (56,517 ) Weighted average common shares and common stock equivalents used to calculate basic earnings per share 10,071,087 10,482,273 Additional common stock equivalents (nonvested stock) used to calculate diluted earnings per share 2,820 10 Weighted average common shares and common stock equivalents used to calculate diluted earnings per share 10,073,907 10,482,283

Investment Securities (Tables)

Investment Securities (Tables)	3 Months Ended
	Dec. 31, 2020
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): December 31, 2020 Amortized Cost Gross Unrealized Gains Gross Unrealized Losses Fair Value Available for Sale Fannie Mae $ 36,177 $ 1,205 $ (79 ) $ 37,303 Freddie Mac 27,906 893 (2 ) 28,797 Governmental National Mortgage Association 12,992 349 (54 ) 13,287 Total mortgage-backed securities 77,075 2,447 (135 ) 79,387 Obligations of states and political subdivisions 21,127 746 — 21,873 U.S. government agency securities 1,998 31 — 2,029 Corporate obligations 56,596 918 (479 ) 57,035 Other debt securities 13,494 394 (136 ) 13,752 Total $ 170,290 $ 4,536 $ (750 ) $ 174,076 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 months ended December 31, 2020 and 2019. (in thousands) Three Months Ended December 31, 2020 Three Months Ended December 31, 2019 Net gains recognized during the period on equity securities $ 7 $ 1 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 $ 7 $ 1
Schedule of Amortized Cost and Fair Value of Debt Securities by Contractual Maturity	The amortized cost and fair value of debt securities at December 31, 2020, 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 Amortized Cost Fair Value Due in one year or less $ 3,382 $ 3,399 Due after one year through five years 28,945 29,688 Due after five years through ten years 50,959 51,586 Due after ten years 87,004 89,403 Total $ 170,290 $ 174,076
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): December 31, 2020 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 10 $ 1,513 $ (16 ) $ 5,109 $ (63 ) $ 6,622 $ (79 ) Freddie Mac 0 — — 314 (2 ) 314 (2 ) Governmental National Mortgage Association 6 1,266 (19 ) 3,067 (35 ) 4,333 (54 ) Corporate obligations 24 18,570 (175 ) 4,066 (304 ) 22,636 (479 ) Other debt securities 10 — — 3,652 (136 ) 3,652 (136 ) Total 50 $ 21,349 $ (210 ) $ 16,208 $ (540 ) $ 37,557 $ (750 ) 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 — 0 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)	3 Months Ended
	Dec. 31, 2020
Receivables [Abstract]
Summary of Loans Receivable	Loans receivable consist of the following (in thousands): December 31, 2020 September 30, 2020 Real estate loans: Residential $ 601,530 $ 610,172 Construction 11,626 11,853 Commercial 508,043 509,628 Commercial 123,376 139,603 Obligations of states and political subdivisions 72,527 79,230 Home equity loans and lines of credit 40,459 40,800 Auto loans 32,013 39,795 Other 1,862 2,293 1,391,436 1,433,374 Less allowance for loan losses 16,141 15,400 Net loans $ 1,375,295 $ 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): December 31, 2020 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 $ 992 $ 1,086 Carrying amount $ 931 $ 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 December 31, 2020 Real estate loans: Residential $ 601,530 $ 3,580 $ — $ 597,950 Construction 11,626 — — 11,626 Commercial 508,043 11,088 931 496,024 Commercial 123,376 1,195 — 122,181 Obligations of states and political subdivisions 72,527 — — 72,527 Home equity loans and lines of credit 40,459 96 — 40,363 Auto loans 32,013 131 — 31,882 Other 1,862 11 — 1,851 Total $ 1,391,436 $ 16,101 $ 931 $ 1,374,404 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 December 31, 2020 With no specific allowance recorded: Real estate loans Residential $ 3,367 $ 4,619 $ — Construction — — — Commercial 4,054 6,241 — Commercial 1,195 1,291 — Obligations of states and political subdivisions — — — Home equity loans and lines of credit 96 182 — Auto loans 63 95 — Other 11 22 — Total 8,786 12,450 — With an allowance recorded: Real estate loans Residential 213 271 21 Construction — — — Commercial 7,034 7,145 61 Commercial — — — Obligations of states and political subdivisions — — — Home equity loans and lines of credit — — — Auto loans 68 74 20 Other — — — Total 7,315 7,490 102 Total: Real estate loans Residential 3,580 4,890 21 Construction — — — Commercial 11,088 13,386 61 Commercial 1,195 1,291 — Obligations of states and political subdivisions — — — Home equity loans and lines of credit 96 182 — Auto loans 131 169 20 Other 11 22 — Total Impaired Loans $ 16,101 $ 19,940 $ 102 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 December 31, 2020 2019 2020 2019 Average Recorded Investment Average Recorded Investment Interest Income Recognized Interest Income Recognized With no specific allowance recorded: Real estate loans Residential $ 1,436 $ 3,933 $ 1 $ 1 Construction — — — — Commercial 11,131 2,398 — — Commercial 1,313 392 — — Obligations of states and political subdivisions — — — — Home equity loans and lines of credit 109 322 — — Auto loans 55 116 — 1 Other 11 19 — — Total 14,055 7,180 1 2 With an allowance recorded: Real estate loans Residential 221 297 — — Construction — — — — Commercial 2,581 333 — — Commercial 37 65 — — Obligations of states and political subdivisions — — — — Home equity loans and lines of credit — 0 — — Auto loans 40 212 — — Other — 5 — — Total 2,879 912 — — Total: Real estate loans Residential 1,657 4,230 1 1 Construction — — — — Commercial 13,712 2,731 — — Commercial 1,350 457 — — Obligations of states and political subdivisions — — — — Home equity loans and lines of credit 109 322 — — Auto loans 95 328 — 1 Other 11 24 — — Total Impaired Loans $ 16,934 $ 8,092 $ 1 $ 2
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 December 31, 2020 and September 30, 2020 (in thousands): Pass Special Mention Substandard Doubtful or Loss Total December 31, 2020 Commercial real estate loans $ 469,972 $ 18,608 $ 19,463 $ — $ 508,043 Commercial 121,932 108 1,336 — 123,376 Obligations of states and political subdivisions 72,527 — — — 72,527 Total $ 664,431 $ 18,716 $ 20,799 $ — $ 703,946 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 December 31, 2020 and September 30, 2020 (in thousands): Performing Non- performing Total December 31, 2020 Real estate loans: Residential $ 596,489 $ 5,041 $ 601,530 Construction 11,626 — 11,626 Home equity loans and lines of credit 40,262 197 40,459 Auto loans 31,873 140 32,013 Other 1,844 18 1,862 Total $ 682,094 $ 5,396 $ 687,490 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 December 31, 2020 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 December 31, 2020 Real estate loans: Residential $ 594,713 $ 1,192 $ 584 $ — $ 5,041 $ 6,817 $ — $ — $ 601,530 Construction 11,626 — — — — — — — 11,626 Commercial 485,544 8,464 105 — 12,999 21,568 233 698 508,043 Commercial 121,882 15 10 — 1,469 1,494 — — 123,376 Obligations of states and political subdivisions 72,527 — — — — — — — 72,527 Home equity loans and lines of credit 40,086 176 — — 197 373 — — 40,459 Auto loans 31,103 766 4 — 140 910 — — 32,013 Other 1,844 — — — 18 18 — — 1,862 Total $ 1,359,325 $ 10,613 $ 703 $ — $ 19,864 $ 31,180 $ 233 $ 698 $ 1,391,436 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 months ended December 31, 2020 and 2019 (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 September 30, 2020 $ 4,301 $ 127 $ 7,209 $ 874 $ 555 $ 337 $ 780 $ 25 $ 1,192 $ 15,400 Charge-offs — — (76 ) (9 ) — (8 ) (155 ) (1 ) — (249 ) Recoveries — — 17 — — 1 72 — — 90 Provision 206 8 712 39 (47 ) 20 (77 ) (2 ) 41 900 ALL balance at December 31, 2020 $ 4,507 $ 135 $ 7,862 $ 904 $ 508 $ 350 $ 620 $ 22 $ 1,233 $ 16,141 ALL balance at September 30, 2019 $ 4,243 $ 53 $ 3,806 $ 1,870 $ 343 $ 329 $ 1,384 $ 28 $ 574 $ 12,630 Charge-offs (22 ) — (40 ) — — (29 ) (372 ) (2 ) (465 ) Recoveries 1 — 42 1 — 1 161 1 207 Provision (61 ) 29 (204 ) 370 (3 ) 68 59 (3 ) 120 375 ALL balance at December 31, 2019 $ 4,161 $ 82 $ 3,604 $ 2,241 $ 340 $ 369 $ 1,232 $ 24 $ 694 $ 12,747 During the three months ended December 31, 2020, the Company recorded provision expense for the residential real estate loans, construction real estate loans, commercial real estate loans, commercial loans, construction loans and home equity loans and lines of credit 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 obligations of states and political subdivisions, auto loan and other loan segments. During the three months ended December 31, 2019, the Company recorded provision expense for the construction real estate loans, commercial, home equity loans and lines of credit and auto loan segments, due to either increased loan balances, changes in the loan mix within the pool, and/or charge-off activity in those segments. Credit provisions were recorded for loan loss for the residential real estate, commercial real estate, obligations of states and political subdivisions and other loan segments. The Company is closely monitoring all customer credit positions, particularly loans requesting payment relief. Such loans, as of December 31, 2020, amounted to approximately 2.3% of total loans outstanding, including $28.1 million in commercial real estate loans, $108,000 in commercial loans, $3.3 million in mortgage loans and $160,000 in auto loans. As the economic slowdown continues to evolve due to COVID-19 restrictions, 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 December 31, 2020 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 $ 21 $ — $ 61 $ — $ — $ — $ 20 $ — $ — $ 102 Collectively evaluated for impairment 4,486 135 7,801 904 508 350 600 22 1,233 16,039 ALL balance at December 31, 2020 $ 4,507 $ 135 $ 7,862 $ 904 $ 508 $ 350 $ 620 $ 22 $ 1,233 $ 16,141 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 December 31, 2019 (dollars in thousands): For the Three Months Ended December 31, 2019 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)	3 Months Ended
	Dec. 31, 2020
Deposits Liabilities Disclosures [Abstract]
Schedule of Deposits by Major Classifications	Deposits consist of the following major classifications (in thousands): December 31, 2020 September 30, 2020 Non-interest bearing demand accounts $ 256,202 $ 242,642 Interest bearing demand accounts 314,509 274,722 Money market accounts 390,173 401,863 Savings and club accounts 168,435 160,975 Certificates of deposit 501,015 463,494 Total $ 1,630,334 $ 1,543,696

Net Periodic Benefit Cost-Def_2

Net Periodic Benefit Cost-Defined Benefit Plan (Tables)	3 Months Ended
	Dec. 31, 2020
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 month periods ended December 31, 2020 and 2019 (in thousands): For the Three Months Ended December 31, 2020 2019 Service Cost $ — $ — Interest Cost 113 121 Expected return on plan assets (289 ) (269 ) Amortization of net loss from earlier periods 55 — Net periodic benefit cost $ (121 ) $ (148 )

Equity Incentive Plan (Tables)

Equity Incentive Plan (Tables)	3 Months Ended
	Dec. 31, 2020
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 December 31, 2020, and changes therein during the three 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 — — Forfeited — — Nonvested at December 31, 2020 79,184 $ 14.16

Fair Value (Tables)

Fair Value (Tables)	3 Months Ended
	Dec. 31, 2020
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 December 31, 2020 and September 30, 2020 by level within the fair value hierarchy (in thousands). Recurring Fair Value Measurements at Reporting Date December 31, 2020 Assets Level I Level II Level III Total Investment securities available for sale: Mortgage backed securities $ — $ 79,387 $ — $ 79,387 Obligations of states and political subdivisions — 21,873 — 21,873 U.S. government agencies — 2,029 — 2,029 Corporate obligations — 51,647 5,388 57,035 Other debt securities — 13,752 — 13,752 Total debt securities $ — $ 168,688 $ 5,388 $ 174,076 Equity securities- financial services 24 — — 24 Derivatives and hedging activities — 1,694 — 1,694 Liabilities Derivatives and hedging activities — 5,315 — 5,315 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 month periods ended December 31, 2020 and 2019 (in thousands). Fair Value Measurement Using Significant Unobservable Inputs (Level III) Three Months Ended December 31, 2020 December 31, 2019 Beginning balance $ 8,260 $ 7,792 Purchases, sales, issuances, settlements, net (3,000 ) — Total unrealized gain (loss): Included in earnings — — Included in other comprehensive income (loss) 128 29 Transfers in and/or out of Level III — — $ 5,388 $ 7,821
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 December 31, 2020 and September 30, 2020 by level within the fair value hierarchy: Non-Recurring Fair Value Measurements at Reporting Date (in thousands) December 31, 2020 Level I Level II Level III Total Foreclosed real estate $ — $ — $ 160 $ 160 Impaired loans — — 7,213 7,213 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 December 31, 2020 Impaired loans $ 7,213 Appraisal of collateral (1) Appraisal adjustments (2) 0% to 35% (20.4%) Foreclosed real estate owned 160 Appraisal of collateral (1) Appraisal adjustments (2) 20% to 35% (27.9%) 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 December 31, 2020 and September 30, 2020 by level within the fair value hierarchy: December 31, 2020 (in thousands) Carrying Level I Level II Level III Total Fair Value Financial assets: Loans receivable, net 1,375,295 — — 1,387,543 1,387,543 Mortgage servicing rights 511 — — 511 511 Financial liabilities: Deposits $ 1,630,334 $ 1,129,319 $ — $ 505,649 $ 1,634,968 Other borrowings 14,164 — — 15,392 15,392 September 30, 2020 (in thousands) Carrying Level I Level II Level III Total Fair Value Financial assets: Loans receivable, net 1,418,182 — — 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)	3 Months Ended
	Dec. 31, 2020
Equity [Abstract]
Summary of Activity in Accumulated Other Comprehensive Income (Loss)	The activity in accumulated other comprehensive income (loss) for the three month periods ended December 31, 2020 and 2019 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 September 30, 2020 $ (3,432 ) $ 3,167 $ (3,791 ) $ (4,056 ) Other comprehensive income (loss) before reclassifications — (174 ) 406 232 Amounts reclassified from accumulated other comprehensive income (loss) — — 527 527 Period change — (174 ) 933 759 Balance at December 31, 2020 $ (3,432 ) $ 2,993 $ (2,858 ) $ (3,297 ) Balance at September 30, 2019 $ (1,527 ) $ 807 $ (560 ) $ (1,280 ) Other comprehensive income (loss) before reclassifications — (16 ) 173 157 Amounts reclassified from accumulated other comprehensive income (loss) — (175 ) (54 ) (229 ) Period change — (191 ) 119 (72 ) Balance at December 31, 2019 $ (1,527 ) $ 616 $ (441 ) $ (1,352 )
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 month periods ended December 31, 2020 and 2019 (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 December 31, Affected Line Item in the Consolidated Statement of Income 2020 2019 Securities available for sale Net securities gains reclassified into earnings $ — $ 221 Gain on sale of investment securities available for sale, net Related income tax expense — (46 ) Income taxes Net effect on accumulated other comprehensive income (loss) for the period — 175 Derivatives and hedging activities: Interest expense, effective portion (667 ) 68 Deposits and short-term borrowings interest expense Related income tax expense 140 (14 ) Income taxes Net effect on accumulated other comprehensive income (loss) for the period (527 ) 54 Total reclassification for the period $ (527 ) $ 229

Derivatives and Hedging Activit

Derivatives and Hedging Activities (Tables)	3 Months Ended
	Dec. 31, 2020
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 December 31, 2020 and September 30, 2020 (in thousands). Fair Values of Derivative Instruments Asset Derivatives As of December 31, 2020 As of September 30, 2020 Hedged Item Notional Amount Balance Sheet Location Fair Value Notional Amount Balance Sheet Location Fair Value Commercial Loans $ 62,765 Other Assets $ 1,694 $ 55,784 Other Assets $ 2,192 Total $ 62,765 $ 1,694 $ 55,784 $ 2,192 Fair Values of Derivative Instruments Liability Derivatives As of December 31, 2020 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 420,000 Other Liabilities 3,616 410,000 Other Liabilities 4,098 Commercial Loans 77,716 Other Liabilities 1,699 70,784 Other Liabilities 2,204 Total $ 497,716 $ 5,315 $ 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 December 31, 2020 and 2019 (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 December 31, Location of Gain or (Loss) Reclassified from Accumulated OCI into Income (Effective Portion) (Loss) Gain Recognized in OCI on Derivative (Effective Portion) Three Months Ended December 31, Derivatives in Cash Flow Hedging Relationships 2020 2019 2020 2019 Interest Rate Products $ 1,181 $ 151 Interest expense $ (667 ) $ 68 Total $ 1,181 $ 151 $ (667 ) $ 68

Leases (Tables)

Leases (Tables)	3 Months Ended
	Dec. 31, 2020
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) December 31, 2020 Lease Right-of-Use Assets Classification Operating lease right-of-use assets Other assets $ 6,885 Total Lease Right-Of-Use Assets $ 6,885 (in thousands) December 31, 2020 Lease Liabilities Classification Operating lease Liabilities Other liabilities $ 6,984 Total Lease Liabilities $ 6,984 (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. December 31, 2020 Weighted average remaining lease term Operating leases 13.3 years Weighted average discount rate Operating leases 2.40 %
Summary of Components of Lease Cost	The following table represents lease costs and other lease information. As the Company elected, for all classes of underlying assets, not to separate lease and non-lease components and instead to account for them as a single lease component, the variable lease cost primarily represents variable payments such as common area maintenance and utilities. Lease Costs (in thousands) Three Months Ended December 31, 2020 Operating lease cost $ 263 Variable lease cost 64 Net lease cost $ 327 Lease Costs (in thousands) Three Months Ended December 31,2019 Operating lease cost $ 254 Variable lease cost 59 Net lease cost $ 313
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 December 31, 2020 were as follows: (in thousands) Operating leases Twelve months Ended: December 31, 2021 $ 963 December 31, 2022 1,247 December 31, 2023 711 December 31, 2024 536 December 31, 2025 509 Thereafter 4,998 Total future minimum lease payments 8,964 Amounts representing interest (1,980 ) Present Value of Net Future Minimum Lease Payments $ 6,984

Nature of Operations and Basi_2

Nature of Operations and Basis of Presentation - Additional Information (Detail)	Dec. 31, 2020
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
	Dec. 31, 2020	Dec. 31, 2019
Earnings Per Share [Abstract]
Weighted-average common shares outstanding	18,133,095	18,133,095
Average treasury stock shares	(7,279,981)	(6,830,518)
Average unearned ESOP shares	(718,523)	(763,787)
Average unearned non-vested shares	(63,504)	(56,517)
Weighted average common shares and common stock equivalents used to calculate basic earnings per share	10,071,087	10,482,273
Additional common stock equivalents (nonvested stock) used to calculate diluted earnings per share	2,820	10
Weighted average common shares and common stock equivalents used to calculate diluted earnings per share	10,073,907	10,482,283

Earnings Per Share - Additional

Earnings Per Share - Additional Information (Detail) - Stock Option [Member] - $ / shares	3 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Anti-dilutive securities	32,107	53,257
Average weighted price per share of anti-dilutive shares	$ 16.13	$ 16.16

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	Dec. 31, 2020	Sep. 30, 2020
Schedule of Available-for-sale Securities [Line Items]
Available for sale, Amortized Cost	$ 170,290
Available for sale, Fair Value	174,076	$ 212,484
Fannie Mae [Member]
Schedule of Available-for-sale Securities [Line Items]
Available for sale, Amortized Cost	36,177	41,961
Available for sale, Gross Unrealized Gains	1,205	1,385
Available for sale, Gross Unrealized Losses	(79)	(88)
Available for sale, Fair Value	37,303	43,258
Freddie Mac [Member]
Schedule of Available-for-sale Securities [Line Items]
Available for sale, Amortized Cost	27,906	31,642
Available for sale, Gross Unrealized Gains	893	964
Available for sale, Gross Unrealized Losses	(2)	(2)
Available for sale, Fair Value	28,797	32,604
Governmental National Mortgage Association [Member]
Schedule of Available-for-sale Securities [Line Items]
Available for sale, Amortized Cost	12,992	15,300
Available for sale, Gross Unrealized Gains	349	368
Available for sale, Gross Unrealized Losses	(54)	(99)
Available for sale, Fair Value	13,287	15,569
Mortgage-Backed Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Available for sale, Amortized Cost	77,075	88,903
Available for sale, Gross Unrealized Gains	2,447	2,717
Available for sale, Gross Unrealized Losses	(135)	(189)
Available for sale, Fair Value	79,387	91,431
Obligations of States and Political Subdivisions [Member]
Schedule of Available-for-sale Securities [Line Items]
Available for sale, Amortized Cost	21,127	21,136
Available for sale, Gross Unrealized Gains	746	795
Available for sale, Fair Value	21,873	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	31
Available for sale, Fair Value	2,029	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	56,596	51,188
Available for sale, Gross Unrealized Gains	918	807
Available for sale, Gross Unrealized Losses	(479)	(521)
Available for sale, Fair Value	57,035	51,474
Other Debt Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Available for sale, Amortized Cost	13,494	14,265
Available for sale, Gross Unrealized Gains	394	495
Available for sale, Gross Unrealized Losses	(136)	(150)
Available for sale, Fair Value	13,752	14,610
Total Debt Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Available for sale, Amortized Cost	170,290	208,473
Available for sale, Gross Unrealized Gains	4,536	4,871
Available for sale, Gross Unrealized Losses	(750)	(860)
Available for sale, Fair Value	$ 174,076	$ 212,484

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
	Dec. 31, 2020	Dec. 31, 2019
Investments Debt And Equity Securities [Abstract]
Net gains recognized during the period on equity securities	$ 7	$ 1
Unrealized gains recognized during the reporting period on equity securities still held at the reporting date	$ 7	$ 1

Investment Securities - Schedul

Investment Securities - Schedule of Amortized Cost and Fair Value of Debt Securities by Contractual Maturity (Detail) - USD ($) $ in Thousands	Dec. 31, 2020	Sep. 30, 2020
Available-for-sale Securities, Debt Maturities, Amortized Cost Basis, Fiscal Year Maturity [Abstract]
Due in one year or less, Amortized Cost	$ 3,382
Due after one year through five years, Amortized Cost	28,945
Due after five years through ten years, Amortized Cost	50,959
Due after ten years, Amortized Cost	87,004
Available for sale, Amortized Cost	170,290
Available-for-sale Securities, Debt Maturities, Fair Value, Fiscal Year Maturity [Abstract]
Due in one year or less, Fair Value	3,399
Due after one year through five years, Fair Value	29,688
Due after five years through ten years, Fair Value	51,586
Due after ten years, Fair Value	89,403
Total, Fair Value	$ 174,076	$ 212,484

Investment Securities - Additio

Investment Securities - Additional Information (Detail) - USD ($)	3 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Amortized Cost And Fair Value Debt Securities [Abstract]
Realized gross gains		$ 221,000
Realized gross losses		0
Proceeds from the sale of investment securities	$ 0	$ 13,000,000

Investment Securities - Sched_2

Investment Securities - Schedule of Gross Unrealized Losses and Fair Value (Detail) $ in Thousands	Dec. 31, 2020USD ($)Security	Sep. 30, 2020USD ($)Security
Schedule of Available-for-sale Securities [Line Items]
Number of Securities, Debt | Security	50	46
Fair Value, Less than Twelve Months, Debt	$ 21,349	$ 19,368
Gross Unrealized Losses, Less than Twelve Months, Debt	(210)	(175)
Fair Value, Twelve Months or Greater, Debt	16,208	19,275
Gross Unrealized Losses, Twelve Months or Greater, Debt	(540)	(685)
Fair Value Total, Debt	37,557	38,643
Gross Unrealized Losses Total, Debt	$ (750)	$ (860)
Fannie Mae [Member]
Schedule of Available-for-sale Securities [Line Items]
Number of Securities, Debt | Security	10	8
Fair Value, Less than Twelve Months, Debt	$ 1,513	$ 1,397
Gross Unrealized Losses, Less than Twelve Months, Debt	(16)	(19)
Fair Value, Twelve Months or Greater, Debt	5,109	5,827
Gross Unrealized Losses, Twelve Months or Greater, Debt	(63)	(69)
Fair Value Total, Debt	6,622	7,224
Gross Unrealized Losses Total, Debt	$ (79)	$ (88)
Freddie Mac [Member]
Schedule of Available-for-sale Securities [Line Items]
Number of Securities, Debt | Security	0	1
Fair Value, Less than Twelve Months, Debt		$ 330
Gross Unrealized Losses, Less than Twelve Months, Debt		(2)
Fair Value, Twelve Months or Greater, Debt	$ 314
Gross Unrealized Losses, Twelve Months or Greater, Debt	(2)
Fair Value Total, Debt	314	330
Gross Unrealized Losses Total, Debt	$ (2)	$ (2)
Governmental National Mortgage Association [Member]
Schedule of Available-for-sale Securities [Line Items]
Number of Securities, Debt | Security	6	7
Fair Value, Less than Twelve Months, Debt	$ 1,266	$ 4,428
Gross Unrealized Losses, Less than Twelve Months, Debt	(19)	(61)
Fair Value, Twelve Months or Greater, Debt	3,067	2,996
Gross Unrealized Losses, Twelve Months or Greater, Debt	(35)	(38)
Fair Value Total, Debt	4,333	7,424
Gross Unrealized Losses Total, Debt	$ (54)	$ (99)
Corporate Obligations [Member]
Schedule of Available-for-sale Securities [Line Items]
Number of Securities, Debt | Security	24	20
Fair Value, Less than Twelve Months, Debt	$ 18,570	$ 13,213
Gross Unrealized Losses, Less than Twelve Months, Debt	(175)	(93)
Fair Value, Twelve Months or Greater, Debt	4,066	6,573
Gross Unrealized Losses, Twelve Months or Greater, Debt	(304)	(428)
Fair Value Total, Debt	22,636	19,786
Gross Unrealized Losses Total, Debt	$ (479)	$ (521)
Other Debt Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Number of Securities, Debt | Security	10	10
Gross Unrealized Losses, Less than Twelve Months, Debt		$ 0
Fair Value, Twelve Months or Greater, Debt	$ 3,652	3,879
Gross Unrealized Losses, Twelve Months or Greater, Debt	(136)	(150)
Fair Value Total, Debt	3,652	3,879
Gross Unrealized Losses Total, Debt	$ (136)	$ (150)

Loans Receivable, Net and All_3

Loans Receivable, Net and Allowance for Loan Losses - Summary of Loans Receivable (Detail) - USD ($)	Dec. 31, 2020	Sep. 30, 2020	Dec. 31, 2019	Sep. 30, 2019
Real estate loans:
Total Loans	$ 1,391,436,000	$ 1,433,374,000
Less allowance for loan losses	16,141,000	15,400,000	$ 12,747,000	$ 12,630,000
Net loans	1,375,295,000	1,417,974,000
Obligations of States and Political Subdivisions [Member]
Real estate loans:
Total Loans	72,527,000	79,230,000
Less allowance for loan losses	508,000	555,000	340,000	343,000
Home Equity Loans and Lines of Credit [Member]
Real estate loans:
Total Loans	40,459,000	40,800,000
Less allowance for loan losses	350,000	337,000	369,000	329,000
Auto Loans [Member]
Real estate loans:
Total Loans	32,013,000	39,795,000
Less allowance for loan losses	620,000	780,000	1,232,000	1,384,000
Net loans	160,000
Other [Member]
Real estate loans:
Total Loans	1,862,000	2,293,000
Less allowance for loan losses	22,000	25,000	24,000	28,000
Residential [Member] | Real Estate Loans [Member]
Real estate loans:
Total Loans	601,530,000	610,172,000
Less allowance for loan losses	4,507,000	4,301,000	4,161,000	4,243,000
Construction [Member] | Real Estate Loans [Member]
Real estate loans:
Total Loans	11,626,000	11,853,000
Less allowance for loan losses	135,000	127,000	82,000	53,000
Commercial [Member]
Real estate loans:
Net loans	28,100,000
Commercial [Member] | Real Estate Loans [Member]
Real estate loans:
Total Loans	508,043,000	509,628,000
Less allowance for loan losses	7,862,000	7,209,000	3,604,000	3,806,000
Commercial Loans [Member]
Real estate loans:
Total Loans	123,376,000	139,603,000
Less allowance for loan losses	904,000	$ 874,000	$ 2,241,000	$ 1,870,000
Net loans	$ 108,000

Loans Receivable, Net and All_4

Loans Receivable, Net and Allowance for Loan Losses - Additional Information (Detail)	3 Months Ended
	Dec. 31, 2020USD ($)LoanContractCustomer	Dec. 31, 2019USD ($)Contract	Sep. 30, 2020USD ($)
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
Minimum external review amount	$ 1,000,000
Payment relief loan reported as percentage of loans outstanding	2.30%
Loan, total	$ 1,375,295,000		$ 1,417,974,000
Number of Contracts | Contract	0
Number of troubled debt restructuring loans granted interest rate concession | Contract		1
Troubled debt restructurings loans granted interest rate concession		$ 534,000
Number of troubled debt restructurings, loan modified, defaulted within one year of modification | Contract	0	0
Mortgage Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loan, total	$ 3,300,000
Mortgage Loans [Member] | Payment Deferrals or Payments of Interest Only [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Number of customers | Customer	17
Auto Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loan, total	$ 160,000
Auto Loans [Member] | Payment Deferrals or Payments of Interest Only [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Number of customers | Customer	22
Commercial Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loan, total	$ 108,000
Commercial Loans [Member] | Payment Deferrals or Payments of Interest Only [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loan, total	$ 28,200,000
Number of customers | Customer	15
Commercial [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loan, total	$ 28,100,000
Payroll Protection Program [Member] | Commercial Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Number of loans | Loan	596
Loans originated	$ 67,500
Guaranteed loans maturity period	two 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	Dec. 31, 2020	Sep. 30, 2020
Accounts, Notes, Loans and Financing Receivable [Line Items]
Carrying amount	$ 1,391,436	$ 1,433,374
Loans Acquired with Deteriorated Credit Quality [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Outstanding balance	992	1,086
Carrying amount	$ 931	$ 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	Dec. 31, 2020	Sep. 30, 2020
Financing Receivable, Recorded Investment [Line Items]
Total Loans	$ 1,391,436	$ 1,433,374
Individually Evaluated for Impairment	16,101	17,204
Collectively Evaluated for Impairment	1,374,404	1,415,145
Loans Acquired with Deteriorated Credit Quality [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Loans	931	1,025
Obligations of States and Political Subdivisions [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Loans	72,527	79,230
Collectively Evaluated for Impairment	72,527	79,230
Home Equity Loans and Lines of Credit [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Loans	40,459	40,800
Individually Evaluated for Impairment	96	117
Collectively Evaluated for Impairment	40,363	40,683
Auto Loans [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Loans	32,013	39,795
Individually Evaluated for Impairment	131	210
Collectively Evaluated for Impairment	31,882	39,585
Other [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Loans	1,862	2,293
Individually Evaluated for Impairment	11	11
Collectively Evaluated for Impairment	1,851	2,282
Residential [Member] | Real Estate Loans [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Loans	601,530	610,172
Individually Evaluated for Impairment	3,580	3,949
Collectively Evaluated for Impairment	597,950	606,223
Construction [Member] | Real Estate Loans [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Loans	11,626	11,853
Collectively Evaluated for Impairment	11,626	11,853
Commercial [Member] | Real Estate Loans [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Loans	508,043	509,628
Individually Evaluated for Impairment	11,088	11,322
Collectively Evaluated for Impairment	496,024	497,281
Commercial [Member] | Real Estate Loans [Member] | Loans Acquired with Deteriorated Credit Quality [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Loans	931	1,025
Commercial Loans [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Loans	123,376	139,603
Individually Evaluated for Impairment	1,195	1,595
Collectively Evaluated for Impairment	$ 122,181	$ 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
	Dec. 31, 2020	Dec. 31, 2019	Sep. 30, 2020
Financing Receivable, Impaired [Line Items]
Recorded Investment	$ 16,101		$ 17,204
Unpaid Principal Balance	19,940		21,052
Associated Allowance	102		221
Average Recorded Investment	16,934	$ 8,092
Interest Income Recognized	1	2
With no Specific Allowance Recorded [Member]
Financing Receivable, Impaired [Line Items]
Recorded Investment	8,786		9,641
Unpaid Principal Balance	12,450		13,412
Average Recorded Investment	14,055	7,180
Interest Income Recognized	1	2
With an Allowance Recorded [Member]
Financing Receivable, Impaired [Line Items]
Recorded Investment	7,315		7,563
Unpaid Principal Balance	7,490		7,640
Associated Allowance	102		221
Average Recorded Investment	2,879	912
Home Equity Loans and Lines of Credit [Member]
Financing Receivable, Impaired [Line Items]
Recorded Investment	96		117
Unpaid Principal Balance	182		222
Average Recorded Investment	109	322
Home Equity Loans and Lines of Credit [Member] | With no Specific Allowance Recorded [Member]
Financing Receivable, Impaired [Line Items]
Recorded Investment	96		117
Unpaid Principal Balance	182		222
Average Recorded Investment	109	322
Home Equity Loans and Lines of Credit [Member] | With an Allowance Recorded [Member]
Financing Receivable, Impaired [Line Items]
Average Recorded Investment		0
Auto Loans [Member]
Financing Receivable, Impaired [Line Items]
Recorded Investment	131		210
Unpaid Principal Balance	169		274
Associated Allowance	20		43
Average Recorded Investment	95	328
Interest Income Recognized		1
Auto Loans [Member] | With no Specific Allowance Recorded [Member]
Financing Receivable, Impaired [Line Items]
Recorded Investment	63		72
Unpaid Principal Balance	95		131
Average Recorded Investment	55	116
Interest Income Recognized		1
Auto Loans [Member] | With an Allowance Recorded [Member]
Financing Receivable, Impaired [Line Items]
Recorded Investment	68		138
Unpaid Principal Balance	74		143
Associated Allowance	20		43
Average Recorded Investment	40	212
Other [Member]
Financing Receivable, Impaired [Line Items]
Recorded Investment	11		11
Unpaid Principal Balance	22		22
Average Recorded Investment	11	24
Other [Member] | With no Specific Allowance Recorded [Member]
Financing Receivable, Impaired [Line Items]
Recorded Investment	11		11
Unpaid Principal Balance	22		22
Average Recorded Investment	11	19
Other [Member] | With an Allowance Recorded [Member]
Financing Receivable, Impaired [Line Items]
Average Recorded Investment		5
Residential [Member] | Real Estate Loans [Member]
Financing Receivable, Impaired [Line Items]
Recorded Investment	3,580		3,949
Unpaid Principal Balance	4,890		5,341
Associated Allowance	21		26
Average Recorded Investment	1,657	4,230
Interest Income Recognized	1	1
Residential [Member] | Real Estate Loans [Member] | With no Specific Allowance Recorded [Member]
Financing Receivable, Impaired [Line Items]
Recorded Investment	3,367		3,699
Unpaid Principal Balance	4,619		5,070
Average Recorded Investment	1,436	3,933
Interest Income Recognized	1	1
Residential [Member] | Real Estate Loans [Member] | With an Allowance Recorded [Member]
Financing Receivable, Impaired [Line Items]
Recorded Investment	213		250
Unpaid Principal Balance	271		271
Associated Allowance	21		26
Average Recorded Investment	221	297
Commercial [Member] | Real Estate Loans [Member]
Financing Receivable, Impaired [Line Items]
Recorded Investment	11,088		11,322
Unpaid Principal Balance	13,386		13,511
Associated Allowance	61		132
Average Recorded Investment	13,712	2,731
Commercial [Member] | Real Estate Loans [Member] | With no Specific Allowance Recorded [Member]
Financing Receivable, Impaired [Line Items]
Recorded Investment	4,054		4,203
Unpaid Principal Balance	6,241		6,342
Average Recorded Investment	11,131	2,398
Commercial [Member] | Real Estate Loans [Member] | With an Allowance Recorded [Member]
Financing Receivable, Impaired [Line Items]
Recorded Investment	7,034		7,119
Unpaid Principal Balance	7,145		7,169
Associated Allowance	61		132
Average Recorded Investment	2,581	333
Commercial Loans [Member]
Financing Receivable, Impaired [Line Items]
Recorded Investment	1,195		1,595
Unpaid Principal Balance	1,291		1,682
Associated Allowance			20
Average Recorded Investment	1,350	457
Commercial Loans [Member] | With no Specific Allowance Recorded [Member]
Financing Receivable, Impaired [Line Items]
Recorded Investment	1,195		1,539
Unpaid Principal Balance	1,291		1,625
Average Recorded Investment	1,313	392
Commercial Loans [Member] | With an Allowance Recorded [Member]
Financing Receivable, Impaired [Line Items]
Recorded Investment			56
Unpaid Principal Balance			57
Associated Allowance			$ 20
Average Recorded Investment	$ 37	$ 65

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	Dec. 31, 2020	Sep. 30, 2020
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loan, total	$ 1,375,295	$ 1,417,974
Commercial And Municipal Portfolio Segment
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loan, total	703,946	728,461
Commercial And Municipal Portfolio Segment | Commercial [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loan, total	508,043	509,628
Commercial And Municipal Portfolio Segment | Commercial Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loan, total	123,376	139,603
Commercial And Municipal Portfolio Segment | Obligations of States and Political Subdivisions [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loan, total	72,527	79,230
Commercial And Municipal Portfolio Segment | Pass [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loan, total	664,431	696,565
Commercial And Municipal Portfolio Segment | Pass [Member] | Commercial [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loan, total	469,972	479,475
Commercial And Municipal Portfolio Segment | Pass [Member] | Commercial Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loan, total	121,932	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	72,527	79,230
Commercial And Municipal Portfolio Segment | Special Mention [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loan, total	18,716	15,022
Commercial And Municipal Portfolio Segment | Special Mention [Member] | Commercial [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loan, total	18,608	15,022
Commercial And Municipal Portfolio Segment | Special Mention [Member] | Commercial Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loan, total	108
Commercial And Municipal Portfolio Segment | Substandard [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loan, total	20,799	16,874
Commercial And Municipal Portfolio Segment | Substandard [Member] | Commercial [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loan, total	19,463	15,131
Commercial And Municipal Portfolio Segment | Substandard [Member] | Commercial Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loan, total	$ 1,336	$ 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 ($)	Dec. 31, 2020	Sep. 30, 2020
Financing Receivable, Recorded Investment [Line Items]
Total	$ 1,375,295,000	$ 1,417,974,000
Consumer Portfolio Segment [Member]
Financing Receivable, Recorded Investment [Line Items]
Total	687,490,000	704,913,000
Home Equity Loans and Lines of Credit [Member] | Consumer Portfolio Segment [Member]
Financing Receivable, Recorded Investment [Line Items]
Total	40,459,000	40,800,000
Auto Loans [Member]
Financing Receivable, Recorded Investment [Line Items]
Total	160,000
Auto Loans [Member] | Consumer Portfolio Segment [Member]
Financing Receivable, Recorded Investment [Line Items]
Total	32,013,000	39,795,000
Other [Member] | Consumer Portfolio Segment [Member]
Financing Receivable, Recorded Investment [Line Items]
Total	1,862,000	2,293,000
Performing [Member] | Consumer Portfolio Segment [Member]
Financing Receivable, Recorded Investment [Line Items]
Total	682,094,000	699,837,000
Performing [Member] | Home Equity Loans and Lines of Credit [Member] | Consumer Portfolio Segment [Member]
Financing Receivable, Recorded Investment [Line Items]
Total	40,262,000	40,581,000
Performing [Member] | Auto Loans [Member] | Consumer Portfolio Segment [Member]
Financing Receivable, Recorded Investment [Line Items]
Total	31,873,000	39,572,000
Performing [Member] | Other [Member] | Consumer Portfolio Segment [Member]
Financing Receivable, Recorded Investment [Line Items]
Total	1,844,000	2,282,000
Non-performing [Member] | Consumer Portfolio Segment [Member]
Financing Receivable, Recorded Investment [Line Items]
Total	5,396,000	5,076,000
Non-performing [Member] | Home Equity Loans and Lines of Credit [Member] | Consumer Portfolio Segment [Member]
Financing Receivable, Recorded Investment [Line Items]
Total	197,000	219,000
Non-performing [Member] | Auto Loans [Member] | Consumer Portfolio Segment [Member]
Financing Receivable, Recorded Investment [Line Items]
Total	140,000	223,000
Non-performing [Member] | Other [Member] | Consumer Portfolio Segment [Member]
Financing Receivable, Recorded Investment [Line Items]
Total	18,000	11,000
Residential [Member] | Real Estate Loans [Member] | Consumer Portfolio Segment [Member]
Financing Receivable, Recorded Investment [Line Items]
Total	601,530,000	610,172,000
Residential [Member] | Performing [Member] | Real Estate Loans [Member] | Consumer Portfolio Segment [Member]
Financing Receivable, Recorded Investment [Line Items]
Total	596,489,000	605,549,000
Residential [Member] | Non-performing [Member] | Real Estate Loans [Member] | Consumer Portfolio Segment [Member]
Financing Receivable, Recorded Investment [Line Items]
Total	5,041,000	4,623,000
Construction [Member] | Real Estate Loans [Member] | Consumer Portfolio Segment [Member]
Financing Receivable, Recorded Investment [Line Items]
Total	11,626,000	11,853,000
Construction [Member] | Performing [Member] | Real Estate Loans [Member] | Consumer Portfolio Segment [Member]
Financing Receivable, Recorded Investment [Line Items]
Total	$ 11,626,000	$ 11,853,000

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	Dec. 31, 2020	Sep. 30, 2020
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current	$ 1,359,325	$ 1,409,687
31-60 Days Past Due	10,613	2,711
61-89 Days Past Due	703	410
Non-accrual	19,864	19,541
Total Past Due	31,180	22,662
Purchased Credit Impaired, Accruing	233	236
Purchased Credit Impaired, Nonaccrual	698	789
Total Loans	1,391,436	1,433,374
Obligations of States and Political Subdivisions [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current	72,527	79,230
Total Loans	72,527	79,230
Home Equity Loans and Lines of Credit [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current	40,086	40,533
31-60 Days Past Due	176	48
Non-accrual	197	219
Total Past Due	373	267
Total Loans	40,459	40,800
Auto Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current	31,103	38,971
31-60 Days Past Due	766	593
61-89 Days Past Due	4	8
Non-accrual	140	223
Total Past Due	910	824
Total Loans	32,013	39,795
Other [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current	1,844	2,282
Non-accrual	18	11
Total Past Due	18	11
Total Loans	1,862	2,293
Residential [Member] | Real Estate Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current	594,713	604,168
31-60 Days Past Due	1,192	979
61-89 Days Past Due	584	402
Non-accrual	5,041	4,623
Total Past Due	6,817	6,004
Total Loans	601,530	610,172
Construction [Member] | Real Estate Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current	11,626	11,853
Total Loans	11,626	11,853
Commercial [Member] | Real Estate Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current	485,544	494,881
31-60 Days Past Due	8,464	1,085
61-89 Days Past Due	105
Non-accrual	12,999	12,637
Total Past Due	21,568	13,722
Purchased Credit Impaired, Accruing	233	236
Purchased Credit Impaired, Nonaccrual	698	789
Total Loans	508,043	509,628
Commercial Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current	121,882	137,769
31-60 Days Past Due	15	6
61-89 Days Past Due	10
Non-accrual	1,469	1,828
Total Past Due	1,494	1,834
Total Loans	$ 123,376	$ 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
	Dec. 31, 2020	Dec. 31, 2019	Sep. 30, 2020
Financing Receivable, Allowance for Credit Losses [Line Items]
Balance, Beginning of period	$ 15,400	$ 12,630
Charge-offs	(249)	(465)
Recoveries	90	207
Provision	900	375
Balance, End of period	16,141	12,747
Individually evaluated for impairment	102		$ 221
Collectively evaluated for impairment	16,039		15,179
Commercial Loans [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Balance, Beginning of period	874	1,870
Charge-offs	(9)
Recoveries		1
Provision	39	370
Balance, End of period	904	2,241
Individually evaluated for impairment			20
Collectively evaluated for impairment	904		854
Unallocated [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Balance, Beginning of period	1,192	574
Provision	41	120
Balance, End of period	1,233	694
Collectively evaluated for impairment	1,233		1,192
Real Estate Loans [Member] | Residential [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Balance, Beginning of period	4,301	4,243
Charge-offs		(22)
Recoveries		1
Provision	206	(61)
Balance, End of period	4,507	4,161
Individually evaluated for impairment	21		26
Collectively evaluated for impairment	4,486		4,275
Real Estate Loans [Member] | Construction [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Balance, Beginning of period	127	53
Provision	8	29
Balance, End of period	135	82
Collectively evaluated for impairment	135		127
Real Estate Loans [Member] | Commercial [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Balance, Beginning of period	7,209	3,806
Charge-offs	(76)	(40)
Recoveries	17	42
Provision	712	(204)
Balance, End of period	7,862	3,604
Individually evaluated for impairment	61		132
Collectively evaluated for impairment	7,801		7,077
Obligations of States and Political Subdivisions [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Balance, Beginning of period	555	343
Provision	(47)	(3)
Balance, End of period	508	340
Collectively evaluated for impairment	508		555
Home Equity Loans and Lines of Credit [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Balance, Beginning of period	337	329
Charge-offs	(8)	(29)
Recoveries	1	1
Provision	20	68
Balance, End of period	350	369
Collectively evaluated for impairment	350		337
Auto Loans [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Balance, Beginning of period	780	1,384
Charge-offs	(155)	(372)
Recoveries	72	161
Provision	(77)	59
Balance, End of period	620	1,232
Individually evaluated for impairment	20		43
Collectively evaluated for impairment	600		737
Other [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Balance, Beginning of period	25	28
Charge-offs	(1)	(2)
Recoveries		1
Provision	(2)	(3)
Balance, End of period	22	$ 24
Collectively evaluated for impairment	$ 22		$ 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
	Dec. 31, 2020Contract	Dec. 31, 2019USD ($)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
Pre-Modification Outstanding Recorded Investment		$ 534
Post-Modification Outstanding Recorded Investment		$ 534
Troubled Debt Restructurings [Member]
Financing Receivable, Modifications [Line Items]
Number of Contracts | Contract		1
Pre-Modification Outstanding Recorded Investment		$ 534
Post-Modification Outstanding Recorded Investment		$ 534

Deposits - Schedule of Deposits

Deposits - Schedule of Deposits by Major Classifications (Detail) - USD ($) $ in Thousands	Dec. 31, 2020	Sep. 30, 2020
Deposits Liabilities Disclosures [Abstract]
Non-interest bearing demand accounts	$ 256,202	$ 242,642
Interest bearing demand accounts	314,509	274,722
Money market accounts	390,173	401,863
Savings and club accounts	168,435	160,975
Certificates of deposit	501,015	463,494
Total	$ 1,630,334	$ 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
	Dec. 31, 2020	Dec. 31, 2019
Compensation Related Costs [Abstract]
Interest Cost	$ 113	$ 121
Expected return on plan assets	(289)	(269)
Amortization of net loss from earlier periods	55
Net periodic benefit cost	$ (121)	$ (148)

Equity Incentive Plan - Additio

Equity Incentive Plan - Additional Information (Detail) - USD ($)	Mar. 02, 2016	Dec. 31, 2020	Dec. 31, 2019
Compensation Related Costs Disclosure [Line Items]
Share-based compensation expense		$ 232,000	$ 240,000
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
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		$ 232,000	$ 240,000
Expected future expense		$ 867,000
Remaining vesting periods		3 years 9 months
Restricted Stock [Member] | Minimum [Member]
Compensation Related Costs Disclosure [Line Items]
Restricted shares vesting period		9 months
Restricted Stock [Member] | Maximum [Member]
Compensation Related Costs Disclosure [Line Items]
Restricted shares vesting period		45 months

Equity Incentive Plan - Schedul

Equity Incentive Plan - Schedule of Restricted Stock Option Activity (Detail) - Restricted Stock [Member]	3 Months Ended
	Dec. 31, 2020$ / 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, Nonvested at December 31, 2020 | shares	79,184
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, Nonvested at December 31, 2020 | $ / shares	$ 14.16

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	Dec. 31, 2020	Sep. 30, 2020
Assets
Total debt securities	$ 174,076	$ 212,484
Fair Value, Measurements, Recurring [Member]
Assets
Total debt securities	174,076	212,484
Equity securities- financial services	24	17
Derivatives and hedging activities	1,694	2,192
Liabilities
Derivatives and hedging activities	5,315	7,002
Fair Value, Measurements, Recurring [Member] | Mortgage-Backed Securities [Member]
Assets
Total debt securities	79,387	91,431
Fair Value, Measurements, Recurring [Member] | Obligations of States and Political Subdivisions [Member]
Assets
Total debt securities	21,873	21,931
Fair Value, Measurements, Recurring [Member] | U.S. Government Agency Securities [Member]
Assets
Total debt securities	2,029	8,048
Fair Value, Measurements, Recurring [Member] | Corporate Obligations [Member]
Assets
Total debt securities	57,035	51,474
Fair Value, Measurements, Recurring [Member] | Other Debt Securities [Member]
Assets
Total debt securities	13,752	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	24	17
Fair Value, Measurements, Recurring [Member] | Level II [Member]
Assets
Total debt securities	168,688	204,224
Derivatives and hedging activities	1,694	2,192
Liabilities
Derivatives and hedging activities	5,315	7,002
Fair Value, Measurements, Recurring [Member] | Level II [Member] | Mortgage-Backed Securities [Member]
Assets
Total debt securities	79,387	91,431
Fair Value, Measurements, Recurring [Member] | Level II [Member] | Obligations of States and Political Subdivisions [Member]
Assets
Total debt securities	21,873	21,931
Fair Value, Measurements, Recurring [Member] | Level II [Member] | U.S. Government Agency Securities [Member]
Assets
Total debt securities	2,029	8,048
Fair Value, Measurements, Recurring [Member] | Level II [Member] | Corporate Obligations [Member]
Assets
Total debt securities	51,647	43,214
Fair Value, Measurements, Recurring [Member] | Level II [Member] | Other Debt Securities [Member]
Assets
Total debt securities	13,752	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	5,388	8,260
Fair Value, Measurements, Recurring [Member] | Level III [Member] | Corporate Obligations [Member]
Assets
Total debt securities	$ 5,388	$ 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
	Dec. 31, 2020	Dec. 31, 2019
Fair Value Disclosures [Abstract]
Beginning balance	$ 8,260	$ 7,792
Purchases, sales, issuances, settlements, net	(3,000)
Total unrealized gain (loss):
Included in other comprehensive income (loss)	128	29
Ending balance	$ 5,388	$ 7,821

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	Dec. 31, 2020	Sep. 30, 2020
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Foreclosed real estate	$ 365	$ 269
Fair Value, Measurements, Nonrecurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Foreclosed real estate	160	269
Impaired loans	7,213	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	160	269
Impaired loans	$ 7,213	$ 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	Dec. 31, 2020USD ($)	Sep. 30, 2020USD ($)
Impaired Loans [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair Value Estimate	$ 7,213	$ 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	0.204	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	$ 160	$ 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	0.279	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	Dec. 31, 2020USD ($)Loan	Sep. 30, 2020USD ($)Loan
Fair Value Disclosures [Abstract]
Number of impaired loans | Loan	14	111
Impaired loans, carrying value	$ 7,300	$ 17,200
Impaired loans, valuation allowance	102	221
Impaired loans, net fair value	$ 7,200	$ 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	Dec. 31, 2020	Sep. 30, 2020
Financial assets:
Loans receivable, net	$ 7,200	$ 17,000
Financial liabilities:
Other borrowings	14,164	14,164
Carrying Value [Member]
Financial assets:
Loans receivable, net	1,375,295	1,418,182
Mortgage servicing rights	511	393
Financial liabilities:
Deposits	1,630,334	1,543,696
Other borrowings	14,164	14,164
Estimated Fair Value [Member]
Financial assets:
Loans receivable, net	1,387,543	1,426,962
Mortgage servicing rights	511	393
Financial liabilities:
Deposits	1,634,968	1,547,831
Other borrowings	15,392	17,721
Estimated Fair Value [Member] | Level 1 [Member]
Financial liabilities:
Deposits	1,129,319	1,080,201
Estimated Fair Value [Member] | Level 3 [Member]
Financial assets:
Loans receivable, net	1,387,543	1,426,962
Mortgage servicing rights	511	393
Financial liabilities:
Deposits	505,649	467,630
Other borrowings	$ 15,392	$ 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
	Dec. 31, 2020	Dec. 31, 2019
Accumulated Other Comprehensive Income Loss [Line Items]
Beginning Balance	$ 191,397	$ 189,508
Ending Balance	194,153	191,363
Defined Benefit Pension Plan [Member]
Accumulated Other Comprehensive Income Loss [Line Items]
Beginning Balance	(3,432)	(1,527)
Ending Balance	(3,432)	(1,527)
Unrealized Gains (Losses) on Securities Available for Sale [Member]
Accumulated Other Comprehensive Income Loss [Line Items]
Beginning Balance	3,167	807
Other comprehensive income (loss) before reclassifications	(174)	(16)
Amounts reclassified from accumulated other comprehensive income (loss)		(175)
Total other comprehensive income (loss)	(174)	(191)
Ending Balance	2,993	616
Derivatives [Member]
Accumulated Other Comprehensive Income Loss [Line Items]
Beginning Balance	(3,791)	(560)
Other comprehensive income (loss) before reclassifications	406	173
Amounts reclassified from accumulated other comprehensive income (loss)	527	(54)
Total other comprehensive income (loss)	933	119
Ending Balance	(2,858)	(441)
Accumulated Other Comprehensive Income/(Loss) [Member]
Accumulated Other Comprehensive Income Loss [Line Items]
Beginning Balance	(4,056)	(1,280)
Other comprehensive income (loss) before reclassifications	232	157
Amounts reclassified from accumulated other comprehensive income (loss)	527	(229)
Total other comprehensive income (loss)	759	(72)
Ending Balance	$ (3,297)	$ (1,352)

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
	Dec. 31, 2020	Dec. 31, 2019
Schedule of Available-for-sale Securities [Line Items]
Deposits and short-term borrowings interest expense	$ (189)	$ (505)
Income taxes	(834)	(704)
NET INCOME	4,135	3,410
Reclassification Out of Accumulated Other Comprehensive Income (Loss) [Member]
Schedule of Available-for-sale Securities [Line Items]
NET INCOME	(527)	229
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		221
Income taxes		(46)
NET INCOME		175
Reclassification Out of Accumulated Other Comprehensive Income (Loss) [Member] | Derivatives [Member]
Schedule of Available-for-sale Securities [Line Items]
Deposits and short-term borrowings interest expense	(667)	68
Income taxes	140	(14)
NET INCOME	$ (527)	$ 54

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 ($)	Dec. 31, 2020	Sep. 30, 2020
Other Assets [Member]
Derivatives Fair Value [Line Items]
Derivatives, Notional Amount	$ 62,765,000	$ 55,784,000
Fair Values of Derivative Instruments, Asset	1,694,000	2,192,000
Other Liabilities [Member]
Derivatives Fair Value [Line Items]
Derivatives, Notional Amount	497,716,000	505,784,000
Fair Values of Derivative Instruments, Liability	5,315,000	7,002,000
Commercial Loans [Member] | Other Assets [Member]
Derivatives Fair Value [Line Items]
Derivatives, Notional Amount	62,765,000	55,784,000
Fair Values of Derivative Instruments, Asset	1,694,000	2,192,000
Commercial Loans [Member] | Other Liabilities [Member]
Derivatives Fair Value [Line Items]
Derivatives, Notional Amount	77,716,000	70,784,000
Fair Values of Derivative Instruments, Liability	1,699,000	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
Brokered Deposits [Member] | Other Liabilities [Member]
Derivatives Fair Value [Line Items]
Derivatives, Notional Amount	420,000,000	410,000,000
Fair Values of Derivative Instruments, Liability	$ 3,616,000	$ 4,098,000

Derivatives and Hedging Activ_3

Derivatives and Hedging Activities - Additional Information (Detail)	3 Months Ended
	Dec. 31, 2020USD ($)Contract	Dec. 31, 2019USD ($)	Sep. 30, 2020USD ($)
Derivative Instruments And Hedging Activities Disclosures [Line Items]
Interest expense	$ 2,000,000	$ 4,687,000
Interest income	14,912,000	16,513,000
Derivative liability, collateral against obligations	5,300,000		$ 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	667,000
Interest income		$ 68,000
Increase (decrease) in accrued interest payable	$ 2,000,000
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	18
Derivative, notional principal amount	$ 420,000,000
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	$ 78,000,000

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
	Dec. 31, 2020	Dec. 31, 2019
Derivative Instruments Gain Loss [Line Items]
Loss Recognized in OCI on Derivative	$ 516	$ 219
Designated as Hedging Instrument [Member] | Cash Flow Hedges of Interest Rate Risk [Member]
Derivative Instruments Gain Loss [Line Items]
Loss Recognized in OCI on Derivative	1,181	151
Gain (Loss) Reclassified from Accumulated OCI into Income	(667)	68
Designated as Hedging Instrument [Member] | Interest Rate Products [Member] | Cash Flow Hedges of Interest Rate Risk [Member]
Derivative Instruments Gain Loss [Line Items]
Loss Recognized in OCI on Derivative	1,181	151
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	$ (667)	$ 68

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

Revenue Recognition - Additiona

Revenue Recognition - Additional Information (Detail)	Oct. 01, 2018
Revenue From Contract With Customer [Abstract]
Percentage of cumulative revenue out of scope to 2014-09	90.30%

Leases - Summary of Balance She

Leases - Summary of Balance Sheet Operating Lease Right-of-Use Assets and Lease Liabilities (Detail) - USD ($) $ in Thousands	Dec. 31, 2020	Sep. 30, 2020
ASSETS
Operating lease right-of-use assets	$ 6,885	$ 7,082
Operating Lease, Right-of-Use Asset, Statement of Financial Position [Extensible List]	us-gaap:OtherAssetsMember	us-gaap:OtherAssetsMember
LIABILITIES
Operating lease Liabilities	$ 6,984	$ 7,161
Operating Lease, Liability, Statement of Financial Position [Extensible List]	us-gaap:OtherLiabilitiesMember	us-gaap:OtherLiabilitiesMember

Leases - Summary of Lease Term

Leases - Summary of Lease Term and Discount Rate (Detail)	Dec. 31, 2020
Weighted average remaining lease term
Operating leases	13 years 3 months 18 days
Weighted average discount rate
Operating leases	2.40%

Leases - Summary of Components

Leases - Summary of Components of Lease Cost (Detail) - USD ($) $ in Thousands	3 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Lease Cost [Abstract]
Operating lease cost	$ 263	$ 254
Variable lease cost	64	59
Net lease cost	$ 327	$ 313

Leases - Summary of Future Mini

Leases - Summary of Future Minimum Lease Payments (Detail) - USD ($) $ in Thousands	Dec. 31, 2020	Sep. 30, 2020
Lease Cost [Abstract]
December 31, 2021	$ 963
December 31, 2022	1,247
December 31, 2023	711
December 31, 2024	536
December 31, 2025	509
Thereafter	4,998
Total future minimum lease payments	8,964
Amounts representing interest	(1,980)
Present Value of Net Future Minimum Lease Payments	$ 6,984	$ 7,161