ESSA Bancorp (ESSA) 10-K 14 Dec 18 2018 FY Annual report Financial data

Document and Entity Information

Document and Entity Information - USD ($)	12 Months Ended
	Sep. 30, 2018	Dec. 01, 2018	Mar. 31, 2018
Document And Entity Information [Abstract]
Document Type	10-K
Amendment Flag	false
Document Period End Date	Sep. 30, 2018
Document Fiscal Year Focus	2,018
Document Fiscal Period Focus	FY
Trading Symbol	ESSA
Entity Registrant Name	ESSA Bancorp, Inc.
Entity Central Index Key	1,382,230
Current Fiscal Year End Date	--09-30
Entity Well-known Seasoned Issuer	No
Entity Current Reporting Status	Yes
Entity Voluntary Filers	No
Entity Filer Category	Accelerated Filer
Entity Small Business	true
Entity Emerging Growth Company	false
Entity Shell Company	false
Entity Common Stock, Shares Outstanding		11,611,681
Entity Public Float			$ 154,016,589

Consolidated Balance Sheet

Consolidated Balance Sheet - USD ($)	Sep. 30, 2018	Sep. 30, 2017
ASSETS
Cash and due from banks	$ 39,197,000	$ 36,008,000
Interest-bearing deposits with other institutions	4,342,000	5,675,000
Total cash and cash equivalents	43,539,000	41,683,000
Certificates of deposit	500,000	500,000
Investment securities available for sale, at fair value	371,438,000	390,452,000
Loans receivable (net of allowance for loan losses of $11,688 and $9,365)	1,305,071,000	1,236,681,000
Regulatory stock, at cost	12,973,000	13,832,000
Premises and equipment, net	14,601,000	16,234,000
Bank-owned life insurance	38,630,000	37,626,000
Foreclosed real estate	1,141,000	1,424,000
Intangible assets, net	1,375,000	1,844,000
Goodwill	13,801,000	13,801,000
Deferred income taxes	8,441,000	10,422,000
Other assets	22,280,000	20,719,000
TOTAL ASSETS	1,833,790,000	1,785,218,000
LIABILITIES
Deposits	1,336,855,000	1,274,861,000
Short-term borrowings	179,773,000	137,446,000
Other borrowings	118,723,000	174,168,000
Advances by borrowers for taxes and insurance	6,826,000	5,163,000
Other liabilities	12,427,000	10,853,000
TOTAL LIABILITIES	1,654,604,000	1,602,491,000
STOCKHOLDERS’ EQUITY
Preferred stock ($.01 par value; 10,000,000 shares authorized, none issued)
Common stock ($.01 par value; 40,000,000 shares authorized, 18,133,095 issued; 11,782,718 and 11,596,263 outstanding at September 30, 2018 and 2017, respectively)	181,000	181,000
Additional paid-in capital	180,765,000	180,764,000
Unallocated common stock held by the Employee Stock Ownership Plan (“ESOP”)	(8,255,000)	(8,720,000)
Retained earnings	94,112,000	91,147,000
Treasury stock, at cost; 6,350,377 and 6,536,832 shares at September 30, 2018 and 2017, respectively	(77,707,000)	(79,891,000)
Accumulated other comprehensive loss	(9,910,000)	(754,000)
TOTAL STOCKHOLDERS’ EQUITY	179,186,000	182,727,000
TOTAL LIABILITIES AND STOCKHOLDERS’ EQUITY	$ 1,833,790,000	$ 1,785,218,000

Consolidated Balance Sheet (Par

Consolidated Balance Sheet (Parenthetical) - USD ($) $ in Thousands	Sep. 30, 2018	Sep. 30, 2017
Statement Of Financial Position [Abstract]
Allowance for loan losses	$ 11,688	$ 9,365
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	11,782,718	11,596,263
Treasury stock, shares outstanding	6,350,377	6,536,832

Consolidated Statement of Incom

Consolidated Statement of Income - USD ($) $ in Thousands	12 Months Ended
	Sep. 30, 2018	Sep. 30, 2017
INTEREST INCOME
Loans receivable, including fees	$ 53,399	$ 48,162
Investment securities:
Taxable	8,826	8,042
Exempt from federal income tax	903	1,194
Other investment income	1,375	920
Total interest income	64,503	58,318
INTEREST EXPENSE
Deposits	10,308	8,471
Short-term borrowings	3,516	1,449
Other borrowings	2,444	2,879
Total interest expense	16,268	12,799
NET INTEREST INCOME	48,235	45,519
Provision for loan losses	4,000	3,350
NET INTEREST INCOME AFTER PROVISION FOR LOAN LOSSES	44,235	42,169
NONINTEREST INCOME
Service fees on deposit accounts	3,373	3,440
Services charges and fees on loans	1,319	1,337
Trust and investment fees	1,020	752
Gain on sale of investments, net	162	295
Earnings on bank-owned life insurance	1,004	1,033
Insurance commissions	764	747
Other	171	595
Total noninterest income	7,813	8,199
NONINTEREST EXPENSE
Compensation and employee benefits	23,307	24,420
Occupancy and equipment	4,461	4,472
Professional fees	2,368	2,886
Data processing	3,561	3,657
Advertising	903	1,137
Federal Deposit Insurance Corporation (“FDIC”) premiums	871	870
Gain on foreclosed real estate	(24)	(370)
Amortization of intangible assets	469	643
Other	3,937	3,723
Total noninterest expense	39,853	41,438
Income before income taxes	12,195	8,930
Income taxes	5,664	1,591
NET INCOME	$ 6,531	$ 7,339
Earnings per share:
Basic	$ 0.60	$ 0.69
Diluted	0.60	0.69
Dividends per share	$ 0.36	$ 0.36

Consolidated Statement of Compr

Consolidated Statement of Comprehensive (Loss) Income - USD ($) $ in Thousands	12 Months Ended
	Sep. 30, 2018	Sep. 30, 2017
Statement Of Income And Comprehensive Income [Abstract]
Net income	$ 6,531	$ 7,339
Investment securities available for sale:
Unrealized holding loss	(12,826)	(7,098)
Tax effect	2,943	2,414
Reclassification of gains recognized in net income	(162)	(295)
Tax effect	39	100
Net of tax amount	(10,006)	(4,879)
Pension plan adjustment:
Change in unrealized gains	348	8,039
Tax effect	(73)	(2,733)
Reclassification adjustment related to actuarial gains		226
Tax effect		(77)
Net of tax amount	275	5,455
Derivative and hedging activities adjustments:
Changes in unrealized holding gains on derivative included in net income	1,696	921
Tax effect	(427)	(416)
Reclassification adjustment for gains on derivatives included in net income	(459)	(5)
Tax effect	111	2
Net of tax amount	921	502
Total other comprehensive (loss) income	(8,810)	1,078
Comprehensive (loss) income	$ (2,279)	$ 8,417

Consolidated Statement of Chang

Consolidated Statement of Changes in Stockholders' Equity - USD ($) $ in Thousands	Total	Common Stock [Member]	Additional Paid-In Capital [Member]	Unallocated Common Stock Held by the ESOP [Member]	Retained Earnings [Member]	Treasury Stock [Member]	Accumulated Other Comprehensive Loss [Member]
Beginning Balance at Sep. 30, 2016	$ 176,344	$ 181	$ 181,900	$ (9,174)	$ 87,638	$ (82,369)	$ (1,832)
Beginning Balance, Shares at Sep. 30, 2016		11,393,558
Net income	7,339				7,339
Other comprehensive income	1,078						1,078
Other comprehensive loss	1,078
Cash dividends declared ($.36 per share)	(3,830)				(3,830)
Stock-based compensation	331		331
Allocation of ESOP stock	686		232	454
Allocation of treasury shares to incentive plan			(293)			293
Allocation of treasury shares to incentive plan, Shares		23,971
Stock options exercised	779		(1,406)			2,185
Stock options exercised, Shares		178,734
Ending Balance at Sep. 30, 2017	$ 182,727	$ 181	180,764	(8,720)	91,147	(79,891)	(754)
Ending Balance, Shares at Sep. 30, 2017	11,596,263	11,596,263
Net income	$ 6,531				6,531
Other comprehensive income							(8,810)
Other comprehensive loss	(8,810)						(8,810)
Reclassification of certain income tax effects from accumulated other comprehensive income					346		(346)
Cash dividends declared ($.36 per share)	(3,912)				(3,912)
Stock-based compensation	350		350
Allocation of ESOP stock	725		260	465
Allocation of treasury shares to incentive plan			(185)			185
Allocation of treasury shares to incentive plan, Shares		14,778
Stock options exercised	$ 1,575		(424)			1,999
Stock options exercised, Shares	294,646	171,677
Ending Balance at Sep. 30, 2018	$ 179,186	$ 181	$ 180,765	$ (8,255)	$ 94,112	$ (77,707)	$ (9,910)
Ending Balance, Shares at Sep. 30, 2018	11,782,718	11,782,718

Consolidated Statement of Cha_2

Consolidated Statement of Changes in Stockholders' Equity (Parenthetical) - $ / shares	12 Months Ended
	Sep. 30, 2018	Sep. 30, 2017
Cash dividends declared, per share	$ 0.36	$ 0.36
Retained Earnings [Member]
Cash dividends declared, per share	$ 0.36	$ 0.36

Consolidated Statement of Cash

Consolidated Statement of Cash Flows - USD ($)	12 Months Ended
	Sep. 30, 2018	Sep. 30, 2017
OPERATING ACTIVITIES
Net income	$ 6,531,000	$ 7,339,000
Adjustments to reconcile net income to net cash provided by operating activities:
Provision for loan losses	4,000,000	3,350,000
Provision for depreciation and amortization	1,177,000	1,305,000
Amortization and accretion of discounts and premiums, net	4,259,000	4,458,000
Net gain on sale of investment securities	(162,000)	(295,000)
Compensation expense from ESOP	725,000	686,000
Stock-based compensation	350,000	331,000
Increase in accrued interest receivable	(491,000)	(380,000)
Increase(decrease) in accrued interest payable	326,000	(3,000)
Earnings on bank-owned life insurance	(1,004,000)	(1,033,000)
Deferred federal income taxes	4,572,000	754,000
(Decrease) increase in accrued pension liability	(496,000)	217,000
Gain on foreclosed real estate	(24,000)	(370,000)
Amortization of intangible assets	469,000	643,000
Loss on disposal of fixed assets	562,000
Other, net	2,592,000	2,480,000
Net cash provided by operating activities	23,386,000	19,482,000
INVESTING ACTIVITIES
Certificate of deposit maturities		750,000
Investment securities available for sale:
Proceeds from sale of investment securities	37,889,000	17,378,000
Proceeds from principal repayments and maturities	53,399,000	60,776,000
Purchases	(86,929,000)	(87,176,000)
Increase in loans receivable, net	(76,079,000)	(25,765,000)
Redemption of regulatory stock	24,639,000	22,334,000
Purchase of regulatory stock	(23,780,000)	(20,703,000)
Investment in limited partnership	(476,000)	(1,132,000)
Proceeds from sale of foreclosed real estate	1,566,000	4,012,000
Capital improvements to foreclosed real estate		(36,000)
Purchase of premises, equipment, and software	39,000	(645,000)
Net cash used for investing activities	(69,732,000)	(30,207,000)
FINANCING ACTIVITIES
Increase in deposits, net	61,994,000	60,041,000
Net increase in short-term borrowings	42,327,000	7,986,000
Proceeds from other borrowings	43,630,000	63,057,000
Repayment of other borrowings	(99,075,000)	(119,490,000)
Increase in advances by borrowers for taxes and insurance	1,663,000	207,000
Exercising of stock options	1,575,000	779,000
Dividends on common stock	(3,912,000)	(3,830,000)
Net cash provided by financing activities	48,202,000	8,750,000
Increase (decrease) in cash and cash equivalents	1,856,000	(1,975,000)
CASH AND CASH EQUIVALENTS AT BEGINNING OF YEAR	41,683,000	43,658,000
CASH AND CASH EQUIVALENTS AT END OF YEAR	43,539,000	41,683,000
Cash paid:
Interest	15,942,000	12,802,000
Income taxes	(2,000)	(389,000)
Noncash items:
Transfers from loans to foreclosed real estate	1,259,000	2,371,000
Pension plan curtailment		4,579,000
Unrealized holding loss on investment securities available for sale	$ (12,988,000)	$ (7,393,000)

Summary of Significant Accounti

Summary of Significant Accounting Policies	12 Months Ended
	Sep. 30, 2018
Accounting Policies [Abstract]
Summary of Significant Accounting Policies	1. SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES A summary of significant accounting and reporting policies applied in the presentation of the accompanying financial statements follows: 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. On November 6, 2014, the Company converted its status from a savings and loan holding company to a bank holding company. In addition, the Bank converted from a Pennsylvania-chartered savings association to a Pennsylvania-chartered savings bank. The Bank’s primary business consists of the taking of deposits and granting of loans to customers generally in Monroe, Northampton, Lehigh, Lackawanna, Luzerne, Delaware, Chester, and Montgomery counties, Pennsylvania. The Bank is subject to regulation and supervision by the Pennsylvania Department of Banking and Securities and the Federal Deposit Insurance Corporation. The investment in subsidiary 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. Use of Estimates in the Preparation of Financial Statements The accounting principles followed by the Company and its subsidiary and the methods of applying these principles conform to U.S. generally accepted accounting principles and to general practice within the banking industry. In preparing the consolidated financial statements, the Company 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. Securities The Company determines the appropriate classification of debt securities at the time of purchase and reevaluates such designation as of each balance sheet date. Securities classified as available for sale are those securities that the Company intends to hold for an indefinite period of time but not necessarily to maturity. Any decision to sell a security classified as available for sale would be based on various factors, including significant movement in interest rates, changes in maturity mix of the Company’s assets and liabilities, liquidity needs, regulatory capital considerations, and other similar factors. Securities available for sale are carried at fair value. Unrealized gains and losses are reported in other comprehensive income (loss), net of the related deferred tax effects. Realized gains or losses, determined on the basis of the cost of the specific securities sold, are included in earnings. Premiums and discounts are recognized in interest income using the interest method over the period to maturity. Declines in the fair value of available-for-sale securities below their cost that are deemed to be other than temporary are reflected in earnings as realized losses. In estimating other-than-temporary impairment losses, the Company considers: (1) the length of time and the extent to which the fair value has been less than cost; (2) the financial condition and near-term prospects of the issuer; and (3) the Company’s intent to sell the security or whether it’s more likely than not that the Company would be required to sell the security before its anticipated recovery in market value. Loans Receivable Loans receivable that the Company has the intent and ability to hold for the foreseeable future or until maturity or payoff are stated at their outstanding unpaid principal balances, net of an allowance for loan losses and any deferred fees and costs. Interest income is accrued on the unpaid principal balance. Loan origination fees, net of certain direct origination costs, are deferred and recognized as an adjustment of the yield (interest income) of the related loans. The Company is generally amortizing these amounts over the contractual life of the loan. The accrual of interest is generally discontinued when the contractual payment of principal or interest has become 90 days past due or the Company has serious doubts about further collectability of principal or interest, even though the loan is currently performing. A loan may remain on accrual status if it is in the process of collection and is either guaranteed or well secured. When a loan is placed on nonaccrual status, unpaid interest credited to income is reversed. Interest received on nonaccrual loans generally is either applied against principal or reported as interest income, according to the Company’s judgment as to the collectability of principal. Generally, loans are restored to accrual status when the obligation is brought current and has performed in accordance with the contractual terms for a reasonable period of time and the ultimate collectability of the total contractual principal and interest is no longer in doubt. Loans Acquired Loans acquired including loans that have evidence of deterioration of credit quality since origination and for which it is probable, at acquisition, that the Company will be unable to collect all contractually required payments receivable, are initially recorded at fair value (as determined by the present value of expected future cash flows) with no valuation allowance. Loans are evaluated individually to determine if there is evidence of deterioration of credit quality since origination. The difference between the undiscounted cash flows expected at acquisition and the investment in the loan, or the “accretable yield,” is recognized as interest income on a level-yield method over the life of the loan. Contractually required payments for interest and principal that exceed the undiscounted cash flows expected at acquisition, or the “non-accretable difference,” are not recognized as a yield adjustment or as a loss accrual or a valuation allowance. Increases in expected cash flows subsequent to the initial investment are recognized prospectively through adjustment of the yield on the loan over its remaining estimated life. Decreases in expected cash flows are recognized immediately as impairment. Any valuation allowances on these impaired loans reflect only losses incurred after acquisition. For purchased loans acquired that are not deemed impaired at acquisition, credit discounts representing the principal losses expected over the life of the loan are a component of the initial fair value. Loans are aggregated and accounted for as a pool of loans if the loans being aggregated have common risk characteristics. Subsequent to the purchase date, the methods utilized to estimate the required allowance for credit losses for these loans is similar to originated loans; however, the Company records a provision for loan losses only when the required allowance exceeds any remaining credit discounts. The remaining differences between the purchase price and the unpaid principal balance at the date of acquisition are recorded in interest income over the life of the loans. Allowance for Loan Losses The allowance for loan losses is established through provisions for loan losses charged against income. Loans deemed to be uncollectible are charged against the allowance for loan losses, and subsequent recoveries, if any, are credited to the allowance. The allowance for loan losses is maintained at a level by management which represents the evaluation of known and inherent risks in the loan portfolio at the Consolidated Balance Sheet date. Management’s periodic evaluation of the adequacy of the allowance is based on the Company’s past loan loss experience, known and inherent risks in the portfolio, adverse situations that may affect the borrower’s ability to repay, the estimated value of any underlying collateral, composition of the loan portfolio, current economic conditions, and other relevant factors. This evaluation is inherently subjective, since it requires material estimates that may be susceptible to significant change, including the amounts and timing of future cash flows expected to be received on impaired loans. The allowance consists of specific and general components. The specific component relates to loans that are classified as impaired. For such loans an allowance is established when the discounted cash flows (or collateral value or observable market price) of the impaired loan is lower than the carrying value of that loan. The general component covers nonclassified loans and is based on historical loss experience adjusted for qualitative factors. All loans are considered impaired when, based on current information and events, it is probable that the Company will be unable to collect the scheduled payments of principal or interest when due according to the contractual terms of the loan agreement and all loan types are considered impaired if the loan is restructured in a troubled debt restructuring. Factors considered by management in determining impairment include payment status, collateral value, and the probability of collecting scheduled principal and interest payments when due. Loans that experience insignificant payment delays and payment shortfalls generally are not classified as impaired. Management determines the significance of payment delays and payment shortfalls on a case-by-case basis, taking into consideration all of the circumstances surrounding the loan and the borrower, including the length of the delay, the reasons for the delay, the borrower’s prior payment record, and the amount of the shortfall in relation to the principal and interest owed. 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 classified as a troubled debt restructuring or is more than 180 days past due. A loan is considered to be a troubled debt restructuring (“TDR”) loan when the Company grants a concession to the borrower because of the borrower’s financial condition that it would not otherwise consider. 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 may be removed from the TDR status after one year of performance. Regulatory Stock Regulatory stock consists of Federal Home Loan Bank (“FHLB”) of Pittsburgh stock and Atlantic Community Bankers Bank stock. Regulatory stock is carried at cost. The Company is a member of the Federal Home Loan Bank System and holds stock in the Federal Home Loan Bank of Pittsburgh. As a member, the Company maintains an investment in the capital stock of the FHLB of Pittsburgh in an amount not less than 10 basis points of the outstanding member asset value plus 4.0 percent of its outstanding FHLB borrowings, as calculated throughout the year. The equity security is accounted for at cost and classified separately on the Consolidated Balance Sheet. The stock is bought from and sold to the FHLB based upon its $100 par value. The stock does not have a readily determinable fair value and as such is classified as restricted stock, carried at cost and evaluated by management. The stock’s value is determined by the ultimate recoverability of the par value rather than by recognizing temporary declines. The determination of whether the par value will ultimately be recovered is influenced by criteria such as the following: (a) The significance of the decline in net assets of the FHLB as compared to the capital stock amount and the length of time this situation has persisted; (b) commitments by the FHLB to make payments required by law or regulation and the level of such payments in relation to the operating performance; (c) the impact of legislative and regulatory changes on the customer base of the FHLB; and (d) the liquidity position of the FHLB. With consideration given to these factors, management concluded that the stock was not impaired at September 30, 2018. Loan Servicing Servicing assets are recognized as separate assets when rights are acquired through purchase or through sale of financial assets. Capitalized servicing rights are reported in other assets and are amortized into noninterest income in proportion to, and over the period of, the estimated future net servicing income of the underlying financial assets. Servicing assets are evaluated for impairment based upon a third-party appraisal. Fair value is determined using prices for similar assets with similar characteristics, when available, or based upon discounted cash flows using market-based assumptions. Impairment is recognized through a valuation allowance to the extent that fair value is less than the capitalized amount. The Company’s loan servicing assets at September 30, 2018 and 2017, were not impaired. Total servicing assets included in other assets as of September 30, 2018 and 2017, were $206,000 and $232,000, respectively. Premises and Equipment Land is carried at cost. Premises and equipment are stated at cost less accumulated depreciation. Depreciation is calculated using the straight-line method over the useful lives of the related assets, which range from 10 to 40 years for buildings, land improvements, and leasehold improvements and 3 to 7 years for furniture, fixtures, and equipment. Expenditures for maintenance and repairs are charged to operations as incurred. Costs of major additions and improvements are capitalized. Derivative Instruments and Hedging Activities FASB ASC 815, Derivatives and Hedging (“ASC 815”), provides the disclosure requirements for derivatives and hedging activities with the intent to provide users of financial statements with an enhanced understanding of: (a) how and why an entity uses derivative instruments, (b) how the entity accounts for derivative instruments and related hedged items, and (c) how derivative instruments and related hedged items affect an entity’s financial position, financial performance, and cash flows. Further, qualitative disclosures are required that explain the Company’s objectives and strategies for using derivatives, as well as quantitative disclosures about the fair value of and gains and losses on derivative instruments, and disclosures about credit-risk-related contingent features in derivative instruments. As required by ASC 815, the Company records all derivatives on the balance sheet at fair value. The accounting for changes in the fair value of derivatives depends on the intended use of the derivative, whether the Company has elected to designate a derivative in a hedging relationship and apply hedge accounting and whether the hedging relationship has satisfied the criteria necessary to apply hedge accounting. Derivatives designated and qualifying as a hedge of the exposure to changes in the fair value of an asset, liability, or firm commitment attributable to a particular risk, such as interest rate risk, are considered fair value hedges. Derivatives designated and qualifying as a hedge of the exposure to variability in expected future cash flows, or other types of forecasted transactions, are considered cash flow hedges. Derivatives may also be designated as hedges of the foreign currency exposure of a net investment in a foreign operation. Hedge accounting generally provides for the matching of the timing of gain or loss recognition on the hedging instrument with the recognition of the changes in the fair value of the hedged asset or liability that are attributable to the hedged risk in a fair value hedge or the earnings effect of the hedged forecasted transactions in a cash flow hedge. The Company may enter into derivative contracts that are intended to economically hedge certain of its risk, even though hedge accounting does not apply or the Company elects not to apply hedge accounting. In accordance with the FASB’s fair value measurement guidance, the Company has elected to measure the credit risk of its derivative financial instruments that are subject to master netting agreements on a net basis by counterparty portfolio. Bank-Owned Life Insurance (“BOLI”) The Company owns insurance on the lives of a certain group of key employees. The policies were purchased to help offset the increase in the costs of various fringe benefit plans, including healthcare. The cash surrender value of these policies is included as an asset on the Consolidated Balance Sheet, and any increase in cash surrender value is recorded as noninterest income on the Consolidated Statement of Income. In the event of the death of an insured individual under these policies, the Company would receive a death benefit which would be recorded as noninterest income. Foreclosed Real Estate Real estate owned acquired in settlement of foreclosed loans is carried at fair value minus estimated costs to sell. At acquisition of real estate acquired in settlement of foreclosed loans, the excess of the remaining loan balance over the asset’s estimated fair value less cost to sell is charged off against the allowance for loan losses. Subsequent declines in the asset’s value are recognized as noninterest expense in the Consolidated Statement of Income. Operating expenses of such properties, net of related income, are expensed in the period incurred. Goodwill and Intangible Assets Goodwill is not amortized, but it is tested at least annually for impairment in the fourth quarter, or more frequently if indicators of impairment are present. If the estimated current fair value of a reporting unit exceeds its carrying value, no additional testing is required and an impairment loss is not recorded. The Company uses market capitalization and multiples of tangible book value methods to determine the estimated current fair value of its reporting unit. Based on this analysis, no impairment was recorded in 2018 or 2017. The other intangible assets are assigned useful lives, which are amortized on an accelerated basis over their weighted-average lives. The Company periodically reviews intangible assets for impairment as events or changes in circumstances indicate that the carrying amount of such asset may not be recoverable. Based on these reviews, no impairment was recorded in 2018 and 2017. The following tables provide information for the carrying amount of goodwill and intangible assets (in thousands). Goodwill 2018 2017 Balance at beginning of year $ 13,801 $ 13,801 Goodwill acquired - - Balance at end of year $ 13,801 $ 13,801 Intangible assets 2018 2017 Balance at beginning of year $ 1,844 $ 2,487 Intangible assets acquired - - Amortization (469 ) (643 ) Balance at end of year $ 1,375 $ 1,844 Amortizable intangible assets were composed of the following: September 30, 2018 2017 Gross Amount Accumulated Amortization (dollars in thousands) Core deposit intangible $ 4,787 $ 3,412 $ 2,943 2018 2017 Aggregate amortization expense: As of the years ended September 30 $ 469 $ 643 Estimated future amortization expense (dollars in thousands): 2019 $ 309 2020 275 2021 272 2022 239 2023 190 2024 90 $ 1,375 Employee Benefit Plans The Bank maintains a noncontributory, defined benefit pension plan for all employees who have met age and length of service requirements. The Bank also maintains a defined contribution Section 401(k) plan covering eligible employees. The Company created an ESOP for the benefit of employees who meet certain eligibility requirements. The Company makes cash contributions to the ESOP on an annual basis. The Company maintains an equity incentive plan to provide for issuance or granting of shares of common stock for stock options or restricted stock. The Company has recorded stock-based employee compensation cost using the fair value method as allowed under generally accepted accounting principles. Management estimated the fair values of all option grants using the Black-Scholes option-pricing model. Management estimated the expected life of the options using the simplified method as allowed under generally accepted accounting principles. The risk-free rate was determined utilizing the treasury yield for the expected life of the option contract. Advertising Costs In accordance with generally accepted accounting principles, the Company expenses all advertising expenditures incurred. Transfers of Financial Assets Transfers of financial assets are accounted for as sales when control over the assets has been surrendered. Control over transferred assets is deemed to be surrendered when (1) the assets have been isolated from the Company; (2) the transferee obtains the right (free of conditions that constrain it from taking advantage of that right) to pledge or exchange the transferred assets; and (3) the Company does not maintain effective control over the transferred assets through an agreement to repurchase them before their maturity. Income Taxes Deferred tax assets and liabilities are reflected based on the differences between the financial statement and the income tax basis of assets and liabilities using the enacted marginal tax rates. Deferred income tax expense and benefit are based on the changes in the deferred tax assets or liabilities from period to period. Deferred tax assets and liabilities are reflected at currently enacted income tax rates applicable to the period in which such items are expected to be realized or settled. As changes in tax rates are enacted, deferred tax assets and liabilities are adjusted through the provision for income taxes. The Company files a consolidated federal income tax return and individual state income tax returns. The Company prescribes a recognition threshold and a measurement attribute for the financial statement recognition and measurement of a tax position taken or expected to be taken in a tax return. Benefits from tax positions should be recognized in the financial statements only when it is more likely than not that the tax position will be sustained upon examination by the appropriate taxing authority that would have full knowledge of all relevant information. A tax position that meets the more-likely-than-not recognition threshold is measured at the largest amount of benefit that is greater than 50 percent likely of being realized upon ultimate settlement. Tax positions that previously failed to meet the more-likely-than-not recognition threshold should be recognized in the first subsequent financial reporting period in which that threshold is met. Previously recognized tax positions that no longer meet the more-likely-than-not recognition threshold should be derecognized in the first subsequent financial reporting period in which that threshold is no longer met. Cash and Cash Equivalents The Company has defined cash and cash equivalents as cash and due from banks and interest-bearing deposits with other institutions with original maturities of less than 90 days. Earnings Per Share The Company provides dual presentation of basic and diluted earnings per share. Basic earnings per share are calculated utilizing net income as reported as the numerator and average shares outstanding as the denominator. The computation of diluted earnings per share differs in that the dilutive effects of any options are adjusted for in the denominator. Comprehensive Income (Loss) The Company is required to present comprehensive income (loss) and its components in a full set of general-purpose financial statements for all periods presented. Other comprehensive income (loss) is composed of net unrealized holding gains or losses on its available-for-sale investment and mortgage-backed securities portfolio and derivative instruments, and changes in unrecognized pension cost. Fair Value Measurements The Company groups assets and liabilities carried at fair value in three levels, based on the markets in which the assets are traded and the reliability of the assumptions used to determine fair value. These levels are: • Level I – Valuation is based upon quoted prices for identical instruments traded in active markets. • Level II – Valuation is based upon quoted prices for similar instruments in active markets, quoted prices for identical or similar instruments in markets that are not active, and model-based valuation techniques for which all significant assumptions are observable in the market. • Level III – Valuation is generated from model-based techniques that use significant assumptions not observable in the market. These unobservable assumptions reflect the Company’s own estimates of assumptions that market participants would use in pricing the asset. The Company determines fair value based on the price that would be received to sell an asset or paid to transfer a liability in an orderly transaction between market participants at the measurement date. It is our policy to maximize the use of observable inputs and minimize the use of unobservable inputs when developing fair value measurements, in accordance with the fair value hierarchy in generally accepted accounting principles. Fair value measurements for most of the Company’s assets are obtained from independent pricing services that we have engaged for this purpose. When available, the Company, or the Company’s independent pricing service, use quoted market prices to measure fair value. If market prices are not available, fair value measurement is based upon models that incorporate available trade, bid, and other market information. Subsequently, all of the Company’s financial instruments use either of the foregoing methodologies to determine fair value adjustments recorded to our financial statements. In certain cases, however, when market observable inputs for model-based valuation techniques may not be readily available, we are required to make judgments about assumptions market participants would use in estimating the fair value of financial instruments. The degree of management judgment involved in determining the fair value of a financial instrument is dependent upon the availability of quoted market prices or observable market parameters. For financial instruments that trade actively and have quoted market prices or observable market parameters, there is minimal subjectivity involved in measuring fair value. When observable market prices and parameters are not fully available, management judgment is necessary to estimate fair value. In addition, changes in the market conditions may reduce the availability of quoted prices or observable data. When market data is not available, we use valuation techniques requiring more management judgment to estimate the appropriate fair value measurement. Therefore, the results cannot be determined with precision and may not be realized in an actual sale or immediate settlement of the asset. Additionally, there may be inherent weaknesses in any calculation technique, and changes in the underlying assumptions used, including discount rates and estimates of future cash flows, that could significantly affect the results of current or future valuations. Reclassification of Comparative Amounts Certain items previously reported have been reclassified to conform to the current year’s reporting format. Such reclassifications did not affect consolidated net income or consolidated stockholders’ equity. Adoption of New Standards In August 2017, the FASB issued ASU 2017-12, Derivatives and Hedging (Topic 850) In February 2018, the FASB issued ASU 2018-02, Income Statement – Reporting Comprehensive Income (Topic 220) Recent Accounting Pronouncements In May 2014, the FASB issued ASU 2014-09, Revenue from Contracts with Customers In January 2016, the FASB issued ASU 2016-01, Financial Instruments – Overall (Subtopic 825-10): Recognition and Measurement of Financial Assets and Financial Liabilities In February 2016, the FASB issued ASU 2016-02, Leases (Topic 842) In April 2016, the FASB issued ASU 2016-10, Revenue from Contracts with Customers (Topic 606). Revenue from Contracts with Customers (Topic 606) Revenue from Contracts with Customers (Topic 606) Deferral of the Effective Date In May 2016, the FASB issued ASU 2016-12, Revenue from Contracts with Customers (Topic 606) Revenue from Contracts with Customers (Topic 606) Revenue from Contracts with Customers (Topic 606): Deferral of the Effective Date In June 2016, the FASB issued ASU 2016-13, Financial Instruments - Credit Losses: Measurement of Credit Losses on Financial Instruments In August 2016, the FASB issued ASU 2016-15, Statement of Cash Flows (Topic 230): Classification of Certain Cash Receipts and Cash Payments In January 2017, the FASB issued ASU 2017-04, Simplifying the Test for Goodwill Impairment In February 2017, the FASB issued ASU 2017-05, Other Income—Gains and Losses from the Derecognition of Nonfinancial Assets (Subtopic 610-20). This Update is not expected to have a significant impact on the Company’s financial statements. In March 2017, the FASB issued ASU 2017-07, Compensation—Retirement Benefits (Topic 715) Receivables – Nonrefundable Fees and Other Costs (Subtopic 310-20). The amendments in this Update shorten the amortization period for certain callable debt securities held at a premium. Specifically, the amendments require the premium to be amortized to the earliest call date. The amendments do not require an accounting change for securities held at a discount; the discount continues to be amortized to maturity. For public business entities, the amendments in this Update are effective for fiscal years, and interim periods within those fiscal years, beg For all other entities, the amendments are effective for fiscal years beginning after December 15, 2019, and interim periods within fiscal years beginning after December 15, 2020. Early adoption is permitted, including adoption in an interim period. If an entity early adopts the amendments in an interim period, any adjustments should be reflected as of the beginning of the fiscal year that includes that interim period. An entity should apply the amendments in this Update on a modified retrospective basis through a cumulative-effect adjustment directly to retained earnings as of the beginning of the period of adoption. Additionally, in the period of adoption, an entity should provide disclosures about a change in accounting principle. This Update is not expected to have a significant impact on the Company’s financial statements. In May 2017, the FASB issued ASU 2017-09, Compensation – Stock Compensation (Topic 718) This Update is not expected to have a significant impact on the Company’s financial statements. In July 2017, the FASB issued ASU 2017-11, Earnings Per Share (Topic 260), Distinguishing Liabilities from Equity (Topic 480), and Derivative and Hedging (Topic 815) Debt—Debt with Conversion and Other Options In January 2018, the FASB issued ASU 2018-01, Leases (Topic 84

Earnings per Share

Earnings per Share	12 Months Ended
	Sep. 30, 2018
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 years ended September 30, 2018 and 2017. 2018 2017 Weighted-average common shares outstanding 18,133,095 18,133,095 Average treasury stock shares (6,420,854 ) (6,606,116 ) Average unearned ESOP shares (837,342 ) (882,617 ) Average unearned nonvested shares (41,055 ) (42,629 ) Weighted-average common shares and common stock equivalents used to calculate basic earnings per share 10,833,844 10,601,733 Additional common stock equivalents (nonvested stock) used to calculate diluted earnings per share - - Additional common stock equivalents (stock options) used to calculate diluted earnings per share - 61,724 Weighted-average common shares and common stock equivalents used to calculate diluted earnings per share 10,833,844 10,663,457 At September 30, 2018, there were 37,968 shares of nonvested stock outstanding at prices ranging from $13.52 per share to $16.56 per share that were not included in the computation of diluted earnings per share because to do so would have been anti-dilutive. At September 30, 2017 there were 43,953 shares of nonvested stock outstanding at an average weighted price of $14.50 per share that were not included in the computation of diluted earnings per share because to do so would have been anti-dilutive.

Investment Securities

Investment Securities	12 Months Ended
	Sep. 30, 2018
Investments Debt And Equity Securities [Abstract]
Investment Securities	3. INVESTMENT SECURITIES The amortized cost, gross unrealized gains and losses, and fair value of investment securities available for sale are summarized as follows (in thousands): 2018 Amortized Cost Gross Unrealized Gains Gross Unrealized Losses Fair Value Available for sale Fannie Mae $ 147,433 $ 17 $ (5,827 ) $ 141,623 Freddie Mac 99,587 2 (4,415 ) 95,174 Governmental National Mortgage Association securities 22,164 - (838 ) 21,326 Total mortgage-backed securities 269,184 19 (11,080 ) 258,123 Obligations of states and political subdivisions 42,090 251 (1,392 ) 40,949 U.S. government agency securities 5,678 2 (122 ) 5,558 Corporate obligations 48,559 116 (1,260 ) 47,415 Other debt securities 20,295 - (922 ) 19,373 Total debt securities 385,806 388 (14,776 ) 371,418 Equity securities - financial services 25 - (5 ) 20 Total $ 385,831 $ 388 $ (14,781 ) $ 371,438 2017 Amortized Cost Gross Unrealized Gains Gross Unrealized Losses Fair Value Available for sale Fannie Mae $ 119,333 $ 207 $ (1,203 ) $ 118,337 Freddie Mac 98,668 177 (808 ) 98,037 Governmental National Mortgage Association securities 17,609 43 (203 ) 17,449 Total mortgage-backed securities 235,610 427 (2,214 ) 233,823 Obligations of states and political subdivisions 64,382 1,522 (546 ) 65,358 U.S. government agency securities 18,615 61 (5 ) 18,671 Corporate obligations 49,025 335 (618 ) 48,742 Other debt securities 24,200 47 (414 ) 23,833 Total debt securities 391,832 2,392 (3,797 ) 390,427 Equity securities - financial services 25 - - 25 Total $ 391,857 $ 2,392 $ (3,797 ) $ 390,452 The amortized cost and fair value of debt securities at September 30, 2018, 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 $ 512 $ 512 Due after one year through five years 36,589 36,031 Due after five years through ten years 99,373 95,654 Due after ten years 249,332 239,221 Total $ 385,806 $ 371,418 For the years ended September 30, 2018 and 2017, the Company realized gross gains of $511,000 and $299,000 and gross losses of $349,000 and $4,000 respectively, and proceeds from the sale of investment securities of $37,889,000 and $17,378,000, respectively. Investment securities with carrying values of $256,317,000 and $235,926,000 at September 30, 2018 and 2017, respectively, were pledged to secure public deposits and other purposes as required by law. The following tables show the Company’s gross unrealized losses and fair value, aggregated by investment category and length of time that the individual securities have been in a continuous unrealized loss position (dollars in thousands): 2018 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 100 $ 63,997 $ (1,442 ) $ 74,783 $ (4,385 ) $ 138,780 $ (5,827 ) Freddie Mac 74 28,902 (830 ) 65,812 (3,585 ) 94,714 (4,415 ) Governmental National Mortgage Association securities 19 9,776 (142 ) 11,550 (696 ) 21,326 (838 ) Obligations of states and political subdivisions 25 7,651 (105 ) 21,004 (1,287 ) 28,655 (1,392 ) U.S. government agency securities 3 5,177 (122 ) - - 5,177 (122 ) Corporate obligations 34 20,172 (363 ) 13,206 (897 ) 33,378 (1,260 ) Other debt securities 20 2,399 (38 ) 16,974 (884 ) 19,373 (922 ) Equity securities- financial services 1 20 (5 ) - - 20 (5 ) Total 276 $ 138,094 $ (3,047 ) $ 203,329 $ (11,734 ) $ 341,423 $ (14,781 ) 2017 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 55 $ 61,852 $ (558 ) $ 20,679 $ (645 ) $ 82,531 $ (1,203 ) Freddie Mac 39 38,913 (354 ) 16,427 (454 ) 55,340 (808 ) Governmental National Mortgage Association securities 11 6,669 (41 ) 6,903 (162 ) 13,572 (203 ) Obligations of states and political subdivisions 25 10,944 (59 ) 17,425 (487 ) 28,369 (546 ) U.S. government agency securities 3 8,995 (5 ) - - 8,995 (5 ) Corporate obligations 22 15,119 (104 ) 8,032 (514 ) 23,151 (618 ) Other debt securities 19 7,141 (104 ) 13,806 (310 ) 20,947 (414 ) Total 174 $ 149,633 $ (1,225 ) $ 83,272 $ (2,572 ) $ 232,905 $ (3,797 ) 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, corporate obligations, obligations of states and political subdivisions, equity securities and other debt securities. The Company reviews its position quarterly and has asserted that at September 30, 2018 and 2017, the declines outlined in the above table represent temporary declines and the Company would not be required to sell the security before its anticipated recovery in market value. The Company has concluded that any impairment of its investment securities portfolio at September 30, 2018 and 2017, is not other than temporary but is the result of interest rate changes that are not expected to result in the noncollection of principal and interest during the period.

Loans Receivable

Loans Receivable	12 Months Ended
	Sep. 30, 2018
Receivables [Abstract]
Loans Receivable	4. LOANS RECEIVABLE Loans receivable consist of the following (in thousands): 2018 2017 Real estate loans: Residential $ 580,561 $ 586,708 Construction 3,920 3,097 Commercial 416,573 318,323 Commercial 49,479 44,129 Obligations of states and political subdivisions 73,362 58,079 Home equity loans and lines of credit 43,962 46,219 Auto loans 146,220 186,646 Other 2,682 2,845 1,316,759 1,246,046 Less allowance for loan losses 11,688 9,365 Net loans $ 1,305,071 $ 1,236,681 Included in the September 30, 2018 balances are loans acquired from Eagle National Bank in 2015, First National Community Bank and Franklin Security Bank in 2014 and First Star Bank in 2012. Upon acquisition, the Company evaluated whether each acquired loan (regardless of size) was within the scope of ASC 310-30, Receivables-Loans and Debt Securities Acquired with Deteriorated Credit Quality Changes in the accretable yield for purchased credit-impaired loans were as follows, since acquisition, for the periods ended September 30, 2018 and 2017 (in thousands): September 30, September 30, Balance at beginning of period $ 471 $ 478 Reclassification and other 681 215 Accretion (1,045 ) (222 ) Balance at end of period $ 107 $ 471 Included in reclassification and other for loans acquired without specific evidence of deterioration in credit quality were $681,000 and $215,000 of reclassifications from nonaccretable discounts to accretable discounts in 2018 and 2017 respectively. The following table presents additional information regarding loans acquired and accounted for in accordance with ASC 310-30 (in thousands): September 30, 2018 September 30, 2017 Acquired Loans with Evidence or Deterioration in Credit Quality (ASC 310-30) Acquired Loans with Specific Evidence or Deterioration in Credit Quality (ASC 310-30) Outstanding balance $ 2,497 $ 5,490 Carrying amount 1,802 4,388 There has been $68,000 in allowance for loan losses recorded for acquired loans with or without specific evidence of deterioration in credit quality as of September 30, 2018. There has been $155,000 in allowance for loan losses recorded for acquired loans with or without specific evidence of deterioration in credit quality as of September 30, 2017. In addition, no allowance for loan losses has been reversed. Loans serviced by the Company for others amounted to $72,043,000 and $61,167,000 at September 30, 2018 and 2017, respectively. The Company’s primary business activity is with customers located in counties where its branch offices are located and to a lesser extent, the contiguous counties in the Commonwealth of Pennsylvania. Commercial, residential, and consumer loans are granted. The Company also funds commercial and residential loans originated outside its immediate trade area provided such loans meet the Company’s credit policy guidelines. Although the Company has a diversified loan portfolio at September 30, 2018 and 2017, loans outstanding to individuals and businesses are dependent upon the local economic conditions in its immediate trade area. At September 30, 2018 and 2017, the Company had nonaccrual loans of $10,511,000 and $14,263,000, respectively. Additional interest income that would have been recorded under the original terms of the loan agreements amounted to $171,000, and $449,000 for the years ended September 30, 2018 and 2017, respectively. The following tables show the amount of loans in each category that was 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 September 30, 2018 Real estate loans: Residential $ 580,561 $ 5,317 $ - $ 575,244 Construction 3,920 - - 3,920 Commercial 416,573 5,892 1,801 408,880 Commercial 49,479 85 1 49,393 Obligations of states and political subdivisions 73,362 - - 73,362 Home equity loans and lines of credit 43,962 114 - 43,848 Auto Loans 146,220 445 - 145,775 Other 2,682 17 - 2,665 Total $ 1,316,759 $ 11,870 $ 1,802 $ 1,303,087 Total Loans Individually Evaluated for Loans Acquired with Deteriorated Credit Quality Collectively Evaluated for Impairment September 30, 2017 Real estate loans: Residential $ 586,708 $ 6,202 $ - $ 580,506 Construction 3,097 - - 3,097 Commercial 318,323 7,211 3,775 307,337 Commercial 44,129 1,385 283 42,461 Obligations of states and political subdivisions 58,079 - - 58,079 Home equity loans and lines of credit 46,219 176 330 45,713 Auto Loans 186,646 572 - 186,074 Other 2,845 30 - 2,815 Total $ 1,246,046 $ 15,576 $ 4,388 $ 1,226,082 The Company maintains 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. 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 the Company 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. The following tables include the recorded investment and unpaid principal balances for impaired loans with the associated allowance amount, if applicable, excluding purchased impaired credit loans. Also presented are 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). Recorded Investment Unpaid Principal Balance Associated Allowance Average Recorded Investment Interest Income Recognized September 30, 2018 With no specific allowance recorded: Real estate loans: Residential $ 4,449 $ 6,176 $ - $ 4,192 $ 27 Construction - - - - - Commercial 5,892 6,790 - 6,432 279 Commercial 85 349 - 750 58 Obligations of states and political subdivisions - - - - - Home equity loans and lines of credit 114 138 - 161 1 Auto loans 87 223 - 150 1 Other 17 25 - 27 - Subtotal 10,644 13,701 - 11,712 366 With an allowance recorded: Real estate loans: Residential 868 938 149 1,258 - Construction - - - - - Commercial - - - 13 - Commercial - - - - - Obligations of states and political subdivisions - - - - - Home equity loans and lines of credit - - - 13 - Auto loans 358 375 164 201 - Other - - - - - Subtotal 1,226 1,313 313 1,485 - Total: Real estate loans: Residential 5,317 7,114 149 5,450 27 Construction - - - - - Commercial 5,892 6,790 - 6,445 279 Commercial 85 349 - 750 58 Obligations of states and political subdivisions - - - - - Home equity loans and lines of credit 114 138 - 174 1 Auto loans 445 598 164 351 1 Other 17 25 - 27 - Total $ 11,870 $ 15,014 $ 313 $ 13,197 $ 366 Recorded Investment Unpaid Principal Balance Associated Allowance Average Recorded Investment Interest Income Recognized September 30, 2017 With no specific allowance recorded: Real estate loans: Residential $ 4,392 $ 5,730 $ - $ 5,373 $ 39 Construction - - - - - Commercial 7,191 9,396 - 8,816 297 Commercial 1,385 1,575 - 1,579 120 Obligations of states and political subdivisions - - - - - Home equity loans and lines of credit 176 258 - 231 - Auto loans 123 237 - 116 1 Other 30 36 - 8 - Subtotal 13,297 17,232 - 16,123 457 With an allowance recorded: Real estate loans: Residential 1,810 2,264 154 1,814 - Construction - - - - - Commercial 20 1,193 19 360 - Commercial - - - 30 - Obligations of states and political subdivisions - - - - - Home equity loans and lines of credit - - - 3 - Auto loans 449 468 172 263 7 Other - - - - - Subtotal 2,279 3,925 345 2,470 7 Total: Real estate loans: Residential 6,202 7,994 154 7,187 39 Construction - - - - - Commercial 7,211 10,589 19 9,176 297 Commercial 1,385 1,575 - 1,609 120 Obligations of states and political subdivisions - - - - - Home equity loans and lines of credit 176 258 - 234 - Auto loans 572 705 172 379 8 Other 30 36 - 8 - Total $ 15,576 $ 21,157 $ 345 $ 18,593 $ 464 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 greater than 90 days past due are considered Substandard. Loans in the Doubtful category have all the weaknesses inherent in one classified Substandard with the added characteristic that the 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. To help ensure that risk ratings are accurate and reflect the present and future capacity of borrowers to repay a loan as agreed, the Company 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 Company’s Commercial Loan Officers are responsible for the timely and accurate risk rating of the loans in their portfolios at origination and on an ongoing basis. The Company’s Commercial Loan Officers perform an annual review of all commercial relationships $1,000,000 or greater. Confirmation of the appropriate risk grade is included in the review on an ongoing basis. The Company engages an external consultant to conduct loan reviews on at least a semiannual basis. Generally, the external consultant reviews commercial relationships greater than $1,000,000 and/or all criticized relationships equal to or greater than $500,000. 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 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 within the internal risk rating system as of September 30, 2018 and 2017 (in thousands): Pass Special Mention Substandard Doubtful Total September 30, 2018 Commercial real estate loans $ 392,915 $ 8,960 $ 14,698 $ - $ 416,573 Commercial 48,137 8 1,334 - 49,479 Obligations of states and political subdivisions 73,362 - - - 73,362 Total $ 514,414 $ 8,968 $ 16,032 $ - $ 539,414 Pass Special Mention Substandard Doubtful Total September 30, 2017 Commercial real estate loans $ 300,554 $ 3,376 $ 14,393 $ - $ 318,323 Commercial 40,996 32 3,101 - 44,129 Obligations of states and political subdivisions 58,079 - - - 58,079 Total $ 399,629 $ 3,408 $ 17,494 $ - $ 420,531 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 nonperforming. For residential real estate loans, construction real estate loans, home equity loans and lines of credit, auto loans, and other loans, the Company evaluates credit quality based on the performance of the individual credits. The following tables present the recorded investment in the loan classes based on payment activity as of September 30, 2018 and 2017 (in thousands): Performing Nonperforming Purchased Credit Impaired Total September 30, 2018 Real estate loans: Residential $ 575,244 $ 5,317 $ - $ 580,561 Construction 3,920 - - 3,920 Home equity loans and lines of credit 43,746 216 - 43,962 Auto Loans 145,633 587 - 146,220 Other 2,664 18 - 2,682 Total $ 771,207 $ 6,138 $ - $ 777,345 Performing Nonperforming Purchased Credit Impaired Total September 30, 2017 Real estate loans: Residential $ 580,116 $ 6,592 $ - $ 586,708 Construction 3,097 - - 3,097 Home equity loans and lines of credit 45,576 313 330 46,219 Auto Loans 185,910 736 - 186,646 Other 2,807 38 - 2,845 Total $ 817,506 $ 7,679 $ 330 $ 825,515 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 table presents the classes of the loan portfolio summarized by the aging categories of performing loans and nonaccrual loans as of September 30, 2018 and 2017 (in thousands): 31-60 Days 61-90 Days Greater than 90 Days Past Due and Total Purchased Credit Total Current Past Past Accruing Non­accrual Past Accruing Non­accrual Loans September 30, 2018 Real estate loans: Residential $ 572,236 $ 2,088 $ 920 $ - $ 5,317 $ 8,325 $ - $ - $ 580,561 Construction 3,920 - - - - - - - 3,920 Commercial 412,636 185 - - 1,951 2,136 255 1,546 416,573 Commercial 48,567 25 11 - 875 911 - 1 49,479 Obligations of states and political subdivisions 73,362 - - - - - - - 73,362 Home equity loans and lines of credit 43,716 30 - - 216 246 - - 43,962 Auto loans 144,140 1,473 20 - 587 2,080 - - 146,220 Other 2,647 17 - - 18 35 - - 2,682 Total $ 1,301,224 $ 3,818 $ 951 $ - $ 8,964 $ 13,733 $ 255 $ 1,547 $ 1,316,759 31-60 Days 61-90 Days Greater than 90 Days Past Due and Total Purchased Credit Total Current Past Past Accruing Non­accrual Past Accruing Non­accrual Loans September 30, 2017 Real estate loans: Residential $ 577,034 $ 2,661 $ 421 $ - $ 6,592 $ 9,674 $ - $ - $ 586,708 Construction 3,097 - - - - - - - 3,097 Commercial 312,098 172 - - 2,278 2,450 612 3,163 318,323 Commercial 43,298 18 - - 530 548 - 283 44,129 Obligations of states and political subdivisions 58,079 - - - - - - - 58,079 Home equity loans and lines of credit 45,460 101 15 - 313 429 - 330 46,219 Auto loans 185,247 631 32 - 736 1,399 - - 186,646 Other 2,789 14 4 - 38 56 - - 2,845 Total $ 1,227,102 $ 3,597 $ 472 $ - $ 10,487 $ 14,556 $ 612 $ 3,776 $ 1,246,046 The allowance for loan losses (“ALL”) 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, (2) an allocated allowance based on general economic conditions and other risk factors in our markets and portfolios, and (3) an unallocated allowance not to exceed 10% of total reserves which acts as a contingency against unforeseen future events which may negatively impact the Company’s loan portfolio. We maintain a loan review system, which allows for a periodic review of our loan portfolio and the early identification of potential impaired loans. Such system takes into consideration, among other things, delinquency status, size of loans, type and market value of collateral, and financial condition of the borrowers. General loan loss allowances are based upon a combination of factors including, but not limited to, actual loan loss experience, composition of the loan portfolio, current economic conditions, management’s judgment and losses which are probable and reasonably estimable. The allowance is increased through provisions charged against current earnings and recoveries of previously charged-off loans. Loans that are determined to be uncollectible are charged against the allowance. While management uses available information to recognize probable and reasonably estimable loan losses, future loss provisions may be necessary, based on changing economic conditions. Payments received on impaired loans generally are either applied against principal or reported as interest income, according to management’s judgment as to the collectability of principal. The allowance for loan losses as of September 30, 2018, is 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, as an integral part of their examination process, have periodically reviewed the Company’s allowance for loan losses. The banking regulators may require that the Company recognize additions to the allowance based on their analysis and review of information available to it at the time of their 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 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 the primary segments of the ALL, segregated into the amount required for loans individually evaluated for impairment and the amount required for loans collectively evaluated for impairment as of September 30, 2018 and 2017 (in thousands): Real Estate Loans Obligations of States and Political Home Loans and Lines of Residential Construction Commercial Commercial Subdivisions Credit Auto Other Unallocated Total ALL balance at September 30, 2016 $ 4,426 $ 13 $ 852 $ 882 $ 215 $ 455 $ 1,880 $ 25 $ 308 $ 9,056 Charge-offs (504 ) - (1,352 ) (31 ) - (18 ) (2,009 ) (9 ) - (3,923 ) Recoveries 22 - 27 1 - 8 815 9 - 882 Provision (66 ) 10 2,231 135 33 25 1,150 (4 ) (164 ) 3,350 ALL balance at September 30, 2017 $ 3,878 $ 23 $ 1,758 $ 987 $ 248 $ 470 $ 1,836 $ 21 $ 144 $ 9,365 ALL balance at September 30, 2017 $ 3,878 $ 23 $ 1,758 $ 987 $ 248 $ 470 $ 1,836 $ 21 $ 144 $ 9,365 Charge-offs (335 ) - (54 ) (151 ) - (68 ) (1,833 ) (21 ) - (2,462 ) Recoveries 12 - 49 10 - 54 655 5 - 785 Provision 50 12 1,705 616 75 (160 ) 1,201 18 483 4,000 ALL balance at September 30, 2018 $ 3,605 $ 35 $ 3,458 $ 1,462 $ 323 $ 296 $ 1,859 $ 23 $ 627 $ 11,688 Individually evaluated for impairment $ 149 $ - $ - $ - $ - $ - $ 164 $ - $ - $ 313 Collectively evaluated for impairment 3,456 35 3,458 1,462 323 296 1,695 23 627 11,375 ALL balance at September 30, 2018 $ 3,605 $ 35 $ 3,458 $ 1,462 $ 323 $ 296 $ 1,859 $ 23 $ 627 $ 11,688 Individually evaluated for impairment $ 154 $ - $ 19 $ - $ - $ - $ 172 $ - $ - $ 345 Collectively evaluated for impairment 3,724 23 1,739 987 248 470 1,664 21 144 9,020 ALL balance at September 30, 2017 $ 3,878 $ 23 $ 1,758 $ 987 $ 248 $ 470 $ 1,836 $ 21 $ 144 $ 9,365 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. During the year ended September 30, 2018 the Company recorded provision expense for the residential real estate, construction loans, commercial real estate, commercial, obligations of states and political subdivisions, auto and other loan segments, due to either increased loan balances, changes in the loan mix within the pool, and/or charge-off activity in those segments. Credit provisions were recorded for loan loss for the home equity loans and lines of credit segment. During the year ended September 30, 2017 the Company recorded provision expense for the construction loan, commercial real estate, commercial, obligations of states and political subdivisions, 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 the residential real estate and other loan segments. The provision for auto loans declined from $1.3 million to $1.2 million due to declining balances offsetting net (of recoveries) charge off activity. The following is a summary of troubled debt restructurings granted during the periods indicated (dollars in thousands). For the Year Ended September 30, 2018 Number of Contracts Pre-Modification Outstanding Recorded Investment Post-Modification Outstanding Recorded Investment Troubled debt restructurings Real estate loans: Residential 3 $ 446 $ 446 Construction - - - Commercial 2 123 123 Commercial - - - Obligations of states and political subdivisions - - - Home equity loans and lines of credit - - - Auto loans 4 35 35 Other - - - Total 9 $ 604 $ 604 For the Year Ended September 30, 2017 Number of Contracts Pre-Modification Outstanding Recorded Investment Post-Modification Outstanding Recorded Investment Troubled debt restructurings Real estate loans: Residential 6 $ 1,154 $ 1,167 Construction - - - Commercial 2 1,208 1,163 Commercial - - - Obligations of states and political subdivisions - - - Home equity loans and lines of credit - - - Auto loans 2 37 37 Other 1 22 22 Total 11 $ 2,421 $ 2,389 Of the nine new troubled debt restructurings granted for the year ended September 30, 2018, six loans totaling $278,000 were granted term and rate concessions and three loans totaling $326,000 were granted term concessions. Of the eleven new troubled debt restructurings granted for the year ended September 30, 2017, three loans totaling $1.2 million were granted term concessions, six loans totaling $832,000 were granted term and rate concessions and two loans totaling $368,000 was granted rate concessions. For the year ended September 30, 2018 there was one loan for $76,000 classified as troubled debt restructurings that subsequently defaulted within one year of modification. For the year ended September 30, 2017 there were no loan modifications classified as troubled debt restructurings that subsequently defaulted within one year of modification. Foreclosed assets acquired in settlement of loans are carried at fair value, less estimated costs to sell, and are included on the Consolidated Balance Sheet. As of September 30, 2018, the Company has initiated formal foreclosure proceedings on $2.6

Premises and Equipment

Premises and Equipment	12 Months Ended
	Sep. 30, 2018
Property Plant And Equipment [Abstract]
Premises and Equipment	5. PREMISES AND EQUIPMENT Premises and equipment consist of the following (in thousands): 2018 2017 Land and land improvements $ 6,044 $ 6,269 Buildings and leasehold improvements 16,207 17,047 Furniture, fixtures, and equipment 11,687 11,412 Construction in process - 30 33,938 34,758 Less accumulated depreciation (19,337 ) (18,524 ) Total $ 14,601 $ 16,234 Depreciation expense amounted to $694,000 and $1,077,000 for the years ended September 30, 2018 and 2017 respectively.

Deposits

Deposits	12 Months Ended
	Sep. 30, 2018
Banking And Thrift [Abstract]
Deposits	6. DEPOSITS Deposits and their respective weighted-average interest rates consist of the following major classifications (dollars in thousands): 2018 2017 Weighted- Average Interest Rate Amount Weighted- Average Interest Rate Amount Noninterest-bearing demand accounts - % $ 158,340 - % $ 160,125 Interest bearing demand accounts 0.39 221,327 0.24 208,369 Money market accounts 0.89 296,078 0.51 253,949 Savings and club accounts 0.05 135,862 0.05 141,521 Certificates of deposit 1.76 525,248 1.39 510,897 Total 0.96 % $ 1,336,855 0.70 % $ 1,274,861 2018 2017 Weighted- Average Interest Rate Amount Weighted- Average Interest Rate Amount Certificates of deposit: 0.00 - 2.00% 1.58 % $ 395,583 1.30 % $ 460,132 2.01 - 4.00% 2.29 129,665 2.19 50,765 Total 1.76 % $ 525,248 1.39 % $ 510,897 At September 30, 2018 scheduled maturities of certificates of deposit are as follows (in thousands): 2019 $ 379,865 2020 93,820 2021 17,914 2022 26,583 2023 7,066 Total $ 525,248 Brokered deposits totaled $168,694,000 and $137,736,000 at September 30, 2018 and 2017, respectively. The aggregate amount of certificates of deposit with a minimum denomination of $250,000 were $66,279,000 and $71,073,000 at September 30, 2018 and 2017, respectively. The scheduled maturities of certificates of deposit in denominations of $250,000 or more as of September 30, 2018, are as follows (in thousands): Within three months $ 13,294 Three through six months 7,131 Six through twelve months 32,276 Over twelve months 13,578 Total $ 66,279

Short-Term Borrowings

Short-Term Borrowings	12 Months Ended
	Sep. 30, 2018
Debt Disclosure [Abstract]
Short-Term Borrowings	7. SHORT-TERM BORROWINGS As of September 30, 2018, and 2017, the Company had $179,773,000 and $137,446,000 of short-term borrowings, respectively, of which $64.8 million in 2018 and $10.0 in 2017 were advances on a $150,000,000 line of credit with the FHLB. All borrowings from the FHLB are secured by a blanket lien on qualified collateral, defined principally as investment securities and mortgage loans that are owned by the Company free and clear of any liens or encumbrances. At September 30, 2018, the Company had a borrowing limit of approximately $648.9 million, with a variable rate of interest, based on the FHLB’s cost of funds. The following table sets forth information concerning short-term borrowings (in thousands): 2018 2017 Balance at year-end $ 179,773 $ 137,466 Maximum amount outstanding at any month-end 260,797 185,201 Average balance outstanding during the year 210,050 147,765 Weighted-average interest rate: As of year-end 2.31 % 1.36 % Paid during the year 1.86 % 0.98 % Average balances outstanding during the year represent daily average balances, and average interest rates represent interest expenses divided by the related average balance.

Other Borrowings

Other Borrowings	12 Months Ended
	Sep. 30, 2018
Debt Disclosure [Abstract]
Other Borrowings	8. OTHER BORROWINGS The following table presents contractual maturities of FHLB long-term advances (in thousands): Maturity Range Weighted- Average Stated Interest Rate Ranged Description From To Interest Rate From To 2018 2017 Convertible — — — — — $ — $ 5,000 Fixed rate 10/22/2018 10/27/2020 1.77 1.33 2.85 43,896 75,601 Mid-term 10/18/2018 6/01/2021 1.90 1.02 2.57 74,827 93,567 Total $ 118,723 $ 174,168 Maturities of FHLB long-term advances are summarized as follows (in thousands): Year Ending September 30, Amount Weighted- Average Rate 2019 $ 75,247 1.71 % 2020 30,846 2.02 2021 12,630 2.30 Total $ 118,723 1.85 % The FHLB long-term advances are secured by qualifying assets of the Bank, which include the FHLB stock, securities, and first-mortgage loans.

Income Taxes

Income Taxes	12 Months Ended
	Sep. 30, 2018
Income Tax Disclosure [Abstract]
Income Taxes	9. INCOME TAXES The provision for income taxes consists of (in thousands): 2018 2017 Current: Federal $ 1,086 $ 837 State 6 — Total current taxes 1,092 837 Deferred income tax benefit 890 754 Change in corporate tax rate 3,682 — Total income tax provision $ 5,664 $ 1,591 The tax effects of deductible and taxable temporary differences that gave rise to significant portions of the deferred tax assets and deferred tax liabilities are as follows (in thousands): 2018 2017 Deferred tax assets: Allowance for loan losses $ 2,455 $ 3,184 Adjustment to record funded status of pension plan 127 324 Investment losses subject to Section 382 limitation 2,510 4,562 Purchase accounting adjustment 4 341 Net unrealized loss on securities 3,022 478 Deferred compensation 290 631 Other real estate owned 152 273 Nonaccrual interest 163 223 Employee stock ownership plan 491 750 Alternative minimum tax 604 577 Other 1,304 2,058 Total gross deferred tax assets 11,122 13,401 Deferred tax liabilities: Pension plan 675 924 Mortgage servicing rights 44 80 Premises and equipment 45 12 Net unrealized gain on derivatives 515 413 Low income housing tax credits 684 978 Other 718 572 Total gross deferred tax liabilities 2,681 2,979 Net deferred tax assets $ 8,441 $ 10,422 The Company establishes a valuation allowance for deferred tax assets when management believes that the deferred tax assets are not likely to be realized either through a carryback to taxable income in prior years, future reversals of existing taxable temporary differences, and, to a lesser extent, future taxable income. Accounting principles prescribe a recognition threshold and a measurement attribute for the financial statement recognition and measurement of a tax position taken or expected to be taken in a tax return. Benefits from tax positions should be recognized in the financial statements only when it is more likely than not that the tax position will be sustained upon examination by the appropriate taxing authority that would have full knowledge of all relevant information. A tax position that meets the more-likely-than-not recognition threshold is measured at the largest amount of benefit that is greater than 50 percent likely of being realized upon ultimate settlement. Tax positions that previously failed to meet the more-likely-than-not recognition threshold should be recognized in the first subsequent financial reporting period in which that threshold is met. Previously recognized tax positions that no longer meet the more-likely-than-not recognition threshold should be derecognized in the first subsequent financial reporting period in which that threshold is no longer met. There is currently no liability for uncertain tax positions and no known unrecognized tax benefits. The Company recognizes, when applicable, interest and penalties related to unrecognized tax benefits in the provision for income taxes in the Consolidated Statement of Income. The Company’s federal and state income tax returns for taxable years through 2013 have been closed for purposes of examination by the Internal Revenue Service and the Pennsylvania Department of Revenue. The reconciliation of the federal statutory rate and the Company’s effective income tax rate is as follows (dollars in thousands): 2018 2017 Amount % of Pretax Income Amount % of Pretax Income Provision at statutory rate $ 2,961 24.3 % $ 3,036 34.0 % Income from bank-owned life insurance (243 ) (2.0 ) (351 ) (3.9 ) Tax-exempt income (421 ) (3.5 ) (843 ) (9.5 ) Low-income housing credits (167 ) (1.4 ) (197 ) (2.2 ) Tax rate change 3,682 30.2 — — Other, net (148 ) (1.2 ) (54 ) (0.6 ) Actual tax expense and effective rate $ 5,664 46.4 % $ 1,591 17.8 % The Tax Cuts and Jobs Act, enacted on December 22, 2017, lowered the federal income tax rate from 35% to 21% effective January 1, 2018. As a result, the carrying value of net deferred tax assets was reduced, which increased income tax expense by $3,682,000. The Bank is subject to the Pennsylvania Mutual Thrift Institutions Tax that is calculated at 11.5 percent of earnings based on U.S. generally accepted accounting principles with certain adjustments. Retained earnings include $4.6 million at September 30, 2018, for which no provision for federal income tax has been made. This amount represents deductions for bad debt reserves for tax purposes, which were only allowed to savings institutions that met certain definitional tests prescribed by the Internal Revenue Code of 1986, as amended. The Small Business Job Protection Act of 1996 eliminated the special bad debt deduction granted solely to thrifts. Under the terms of the Act, there would be no recapture of the pre-1988 (base year) reserves. However, these pre-1988 reserves would be subject to recapture under the rules of the Internal Revenue Code if the Bank itself pays a cash dividend in excess of earnings and profits or liquidates. The Act also provides for the recapture of deductions arising from the Bank’s applicable excess reserve, which is defined as the total amount of reserve over the base year reserve. The Bank’s total reserve exceeds the base year reserve, and deferred taxes have been provided for this excess.

Commitments and Contingent Liab

Commitments and Contingent Liabilities	12 Months Ended
	Sep. 30, 2018
Commitments And Contingencies Disclosure [Abstract]
Commitments and Contingent Liabilities	10. COMMITMENTS AND CONTINGENT LIABILITIES In the normal course of business, management makes various commitments that are not reflected in the consolidated financial statements. These commitments involve, to varying degrees, elements of credit and interest rate risk in excess of the amount recognized in the Consolidated Balance Sheet. The Company’s exposure to credit loss in the event of nonperformance by the other parties to the financial instruments is represented by the contractual amounts as disclosed. Losses, if any, are charged to the allowance for loan losses. The Company minimizes its exposure to credit loss under these commitments by subjecting them to credit approval and review procedures and collateral requirements, as deemed necessary, in compliance with lending policy guidelines. The off-balance sheet commitments consist of the following (in thousands): 2018 2017 Commitments to extend credit $ 112,037 $ 67,265 Standby letters of credit 5,329 2,810 Unfunded lines of credit 96,618 77,390 The commitments outstanding at September 30, 2018, contractually mature in less than one year. The instruments involve, to varying degrees, elements of credit and interest rate risk in excess of the amount recognized in the Consolidated Balance Sheet. The Company uses the same credit policies in making commitments and conditional obligations as it does for on-balance sheet instruments. The amount of collateral obtained, as deemed necessary, is based upon management’s credit evaluation in compliance with the lending policy guidelines. Since many of the credit line commitments are expected to expire without being fully drawn upon, the total contractual amounts do not necessarily represent future funding requirements. Standby letters of credit and financial guarantees represent conditional commitments issued to guarantee performance of a customer to a third party. The coverage period for these instruments is typically a one-year period with renewal option subject to prior approval by management. Fees earned from the issuance of these letters are recognized over the coverage period. For secured letters of credit, the collateral is typically Company deposit instruments. The Company is required to maintain a reserve balance with certain third party providers. At September 30, 2018 the reserve balance was $1.2 million. 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 the defendant in an action commenced on September 13, 2016 by one plaintiff. The plaintiff alleges that the Bank repossessed motor vehicles, sold the vehicles and sought to collect deficiency balances in a manner that did not comply with the notice requirements of the Pennsylvania Uniform Commercial Code (“UCC”). The plaintiff seeks to pursue the action as a class action on behalf of the named plaintiff and other similarly situation plaintiffs who had their automobiles repossessed and see to recover damages under the UCC. The Bank denies the plaintiff’s allegations. The parties attended a mediation in October 2017 where they reached an agreement to resolve the claims asserted against the Bank on a class wide basis. Under the terms of the settlement the Bank made a payment of $1,325,000 to the plaintiff’s during the second quarter of the September 30, 2018 fiscal year. The Bank’s insurance carrier reimbursed the Bank for the amount of the payment in excess of its $125,000 retention. The Bank was named as a defendant in an action commenced on December 8, 2016 by one plaintiff who will also see 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, Inc., in the process of making loans, received unearned fees and kickbacks in violation of the Real Estate Settlement Procedures Act. In an order dated January 29, 2018, the court granted the Bank’s motion to dismiss the case. The plaintiff has appealed the court’s ruling. The plaintiff submitted her brief in support of her appeal in May 2018 and the Bank submitted its opposition brief in July 2018. The appellate court had tentatively scheduled oral arguments for December 2018. To the extent that this litigation could result in exposure to the bank, the amount is not currently estimable.

Lease Commitments and Total Ren

Lease Commitments and Total Rental Expense	12 Months Ended
	Sep. 30, 2018
Commitments And Contingencies Disclosure [Abstract]
Lease Commitments and Total Rental Expense	11. LEASE COMMITMENTS AND TOTAL RENTAL EXPENSE The Company leases various branch locations and other offices under long-term operating leases. Future minimum lease payments by year and in the aggregate, under noncancellable operating leases with initial or remaining terms of one year or more, consisted of the following at September 30, 2018 (in thousands): 2019 $ 859 2020 782 2021 596 2022 453 2023 386 2024 and beyond 925 Total $ 4,001 The total rental expenses for the above leases for both years ended September 30, 2018 and 2017, was $1.3 million. The Company also operates four offices that currently do not have long-term operating leases.

Employee Benefits

Employee Benefits	12 Months Ended
	Sep. 30, 2018
Postemployment Benefits [Abstract]
Employee Benefits	12. EMPLOYEE BENEFITS Employee Stock Ownership Plan (“ESOP”) The Company created an ESOP for the benefit of employees who meet the eligibility requirements, which include having completed one year of service with the Company or its subsidiary and attained age 21. The ESOP trust acquired 1,358,472 shares of the Company’s stock from proceeds from a loan with the Company. The Company makes cash contributions to the ESOP on an annual basis sufficient to enable the ESOP to make the required loan payments. Cash dividends paid on allocated shares are distributed to participants and cash dividends paid on unallocated shares are used to repay the outstanding debt of the ESOP. The ESOP trust’s outstanding loan bears interest at prime, adjustable each January 1 st As the debt is repaid, shares are released from the collateral and allocated to qualified employees based on the proportion of payments made during the year to the remaining amount of payments due on the loan through maturity. Accordingly, the shares pledged as collateral are reported as unallocated common stock held by the ESOP shares in the Consolidated Balance Sheet. As shares are released from collateral, the Company reports compensation expense equal to the current market price of the shares, and the shares become outstanding for earnings-per-share computations. The Company recognized ESOP expense of $725,000 and $686,000, for the years ended September 30, 2018 and 2017. The following table presents the components of the ESOP shares: 2018 2017 Allocated shares 345,455 359,711 Shares committed to be released 33,962 33,962 Unreleased shares 826,403 871,686 Total ESOP shares 1,205,820 1,265,359 Fair value of unreleased shares (in thousands) $ 13,437 $ 13,685 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 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 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 March 3, 2016, 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”). The 2016 Plan provides for a total of 250,000 shares of common stock for issuance upon the grant or exercise of awards. The 2016 Plan allows for the granting of restricted stock, restricted stock units, incentive stock options and non-qualified stock options. Certain officers, employees and outside directors were granted in aggregate 1,140,469 NSOs; 317,910 ISOs; and 590,320 shares of restricted stock on May 23, 2008. Certain officers were granted in aggregate 30,000 shares of restricted stock on April 1, 2013, 19,880 shares of restricted stock on July 22, 2014, 21,843 shares of restricted stock on May 20, 2015, 23,491 shares of restricted stock on March 4, 2016, 20,675 shares of restricted stock on December 13, 2016, 3,296 shares of restricted stock on March 29, 2017, 1,250 shares of restricted stock on October 23, 2017, 24,278 shares of restricted stock on December 6, 2017 and 2,000 shares of restricted stock in August 2018. In accordance with generally accepted accounting principles, the Company expenses the fair value of all share-based compensation grants over the requisite service periods. The Company classifies share-based compensation for employees and outside directors within “Compensation and employee benefits” in the Consolidated Statement of Income to correspond with the same line item as compensation paid. Stock options vest over a five-year service period and expire ten years after the grant date. The Company recognized compensation expense for the fair values of these awards, which vested on a straight-line basis over the requisite service period of the awards. The 2013 restricted stock shares vested over an 18-month service period. The 2014 restricted shares vested over a 39 month service period. The 2015 restricted shares vest over a 40 month service period. The March 4, 2016 restricted shares vest over a 43 month service period. The December 13, 2016 restricted shares vest over a 46 month service period. The March 29, 2017 restricted shares vest over 42 months for 1,296 shares and over 18 months for 2,000 shares. The October 23, 2017 restricted shares vest over a 23-month service period. The December 6, 2017 restricted shares vest over a 46-month service period. The August 2018 restricted shares vest over a 24 month service period. 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. During the years ended September 30, 2018 and 2017, the Company recorded $336,000 and $318,000 of share-based compensation expense consisting of restricted stock expense. Expected future compensation expense relating to the restricted shares issued in March 2016, at September 30, 2018 is $76,000 over the remaining vesting period of 1.0 years. Expected future compensation expense relating to the restricted shares issued in December 2016, at September 30, 2018 is $149,000 over the remaining vesting period of 2.0 years. Expected future compensation expense relating to the 1,296 restricted shares The following is a summary of the Company’s stock option activity and related information for its option plan for the year ended September 30, 2018. Number of Stock Options Weighted- Average Exercise Price Weighted- Average Remaining Contractual Term (in years) Aggregate Intrinsic Value (in thousands) Outstanding, September 30, 2017 294,646 $ 12.35 0.67 $ 987 Granted — — — — Exercised 294,646 12.35 — — Forfeited — — — — Outstanding, September 30, 2018 — — — — Exercisable at year-end — — — — The following is a summary of the status of the Company’s nonvested restricted stock as of September 30, 2018, and changes therein during the year then ended: Number of Restricted Weighted- Average Grant Date Fair Value Nonvested at September 30, 2017 34,692 $ 14.89 Granted 27,528 15.37 Vested (20,814 ) 14.58 Forfeited (6,334 ) 15.32 Nonvested at September 30, 2018 35,072 $ 15.37 Defined Benefit Plan The Bank sponsors a trusteed, noncontributory defined benefit pension plan covering substantially all employees and officers. The plan calls for benefits to be paid to eligible employees at retirement based primarily upon years of service with the Bank and compensation rates near retirement. The Bank’s funding policy is to make annual contributions, if needed, based upon the funding formula developed by the plan’s actuary. In February 2017, the Bank amended the defined benefit pension plan to provide that no additional participants would enter the plan and no additional benefits would accrue beyond February 28, 2017. This curtailment resulted in a $4,579,000 reduction to the projected benefit obligation as well as a reduction in accumulated other comprehensive loss of $3,022,000 in 2017. The following table sets forth the change in plan assets and benefit obligation at September 30 (in thousands): 2018 2017 Change in benefit projected obligation: Projected benefit obligation at beginning of year $ 18,598 $ 25,470 Service cost - 516 Interest cost 698 859 Actuarial (gains) losses (204 ) (2,857 ) Curtailment (Plan Freeze) - (4,579 ) Benefits paid (1,981 ) (811 ) Projected benefit obligation at end of year 17,111 18,598 Change in plan assets: Fair value of plan assets at beginning of year 20,363 19,188 Actual return on plan assets 1,338 1,986 Contributions - - Benefits paid (1,981 ) (811 ) Fair value of plan assets at end of year 19,720 20,363 Funded status $ 2,609 $ 1,765 Amounts not yet recognized as a component of net periodic pension cost (in thousands): 2018 2017 Amounts recognized in accumulated other comprehensive loss consist of: Net loss $ 604 $ 953 The accumulated benefit obligation for the defined benefit pension plan was $17,111,000 and $18,598,000 at September 30, 2018 and 2017, respectively. The following table comprises the components of net periodic benefit cost for the years ended September 30 (in thousands): 2018 2017 Service cost $ - $ 516 Interest cost 698 859 Expected return on plan assets (1,193 ) (1,385 ) Amortization of unrecognized loss - 226 Net periodic (benefit) cost $ (495 ) $ 216 The estimated net loss for the defined benefit pension plan that will be amortized from accumulated other comprehensive loss into net periodic benefit cost over the next fiscal year is $0. Weighted-average assumptions used to determine benefit obligations: 2018 2017 Discount rate 4.10 % 3.85 % Rate of compensation increase N/A N/A Weighted-average assumptions used to determine net periodic benefit cost for the years ended: 2018 2017 Discount rate 3.85 % 4.10 % Expected long-term return on plan assets 6.00 % 7.00 Rate of compensation increase N/A N/A The expected long-term rate of return was estimated using market benchmarks by which the plan assets would outperform the market in the future, based on historical experience adjusted for changes in asset allocation and expectations for overall lower future returns on similar investments compared with past periods. Plan Assets The following tables set forth by level, within the fair value hierarchy, the plan’s financial assets at fair value as of September 30, 2018 and 2017 (in thousands): September 30, 2018 Level I Level II Level III Total Assets: Investment in collective trusts Fixed income $ - $ 7,916 $ - $ 7,916 Equity - 11,789 - 11,789 Investment in short-term investments - 15 - 15 Total assets at fair value $ - $ 19,720 $ - $ 19,720 September 30, 2017 Level I Level II Level III Total Assets: Investment in collective trusts Fixed income $ - $ 7,999 $ - $ 7,999 Equity - 12,353 - 12,353 Investment in short-term investments - 11 - 11 Total assets at fair value $ - $ 20,363 $ - $ 20,363 Investments in collective trusts and short-term investments are valued at the net asset value of shares held by the plan. The Bank’s defined benefit pension plan weighted-average asset allocations at September 30, 2018 and 2017 by asset category, are as follows: September 30, Asset Category 2018 2017 Fixed income securities 40.1 % 39.3 % Equity securities 59.8 60.7 Other 0.1 0.0 Total 100.0 % 100.0 % The Bank believes that the plan’s risk and liquidity position are, in large part, a function of the asset class mix. The Bank desires to utilize a portfolio mix that results in a balanced investment strategy. Three asset classes are outlined, as above. The target allocations of these classes are as follows: equity securities, 65 percent, and cash and fixed income securities, 35 percent. Cash Flows The Bank does not expect to make any contributions to its pension plan in 2019. Estimated future benefit payments, which reflect expected future service, as appropriate, are as follows (in thousands): 2019 $ 366 2020 3,106 2021 2,345 2022 659 2023 852 2024-2028 6,495 401(k) Plan The Bank also has a savings plan qualified under Section 401(k) of the Internal Revenue Code, which covers substantially all employees over 21 years of age. Employees can contribute to the plan, but are not required to. Employer contributions were reinstated in March 2017. Employer contributions are allocated based on employee contribution levels. The expense related to the plan for the year ended September 30, 2018 and 2017 was $464,000 and $251,000, respectively. Supplemental Executive Retirement Plan The Bank maintains a salary continuation agreement with certain executives of the Bank, which provides for benefits upon retirement to be paid to the executive for no less than 192 months, unless the executive elects to receive the present value of the payments as a lump sum. The Bank has recorded accruals of $2.1 million and $1.6 million at September 30, 2018 and 2017, respectively which represent the estimated present value (using a discount rate of 6.00 percent) of the benefits earned under this agreement. There was $477,000 and $447,000 in expense related to the supplemental executive retirement plan for the years ended September 30, 2018 and 2017, respectively.

Regulatory Restrictions

Regulatory Restrictions	12 Months Ended
	Sep. 30, 2018
Regulatory Capital Requirements [Abstract]
Regulatory Restrictions	13. REGULATORY RESTRICTIONS Reserve Requirements The Bank is required to maintain reserve funds in cash or in deposit with the Federal Reserve Bank. The required reserve at September 30, 2018 and 2017, was $17,348,000 and $15,228,000, respectively. Dividend Restrictions Federal banking laws, regulations, and policies limit the Bank’s ability to pay dividends to the Company. Dividends may be declared and paid by the Bank only out of net earnings for the then current year. A dividend may not be declared or paid if it would impair the general reserves of the Bank as required to be maintained under the Pennsylvania Banking.

Regulatory Capital Requirements

Regulatory Capital Requirements	12 Months Ended
	Sep. 30, 2018
Banking And Thrift [Abstract]
Regulatory Capital Requirements	14. REGULATORY CAPITAL REQUIREMENTS Federal regulations require the Bank and the Company to maintain certain minimum amounts of capital. Specifically, the Bank and the Company are required to maintain certain minimum dollar amounts and ratios of Total and Tier 1 capital to risk-weighted assets, of Tier 1 capital to average total assets, and common equity Tier 1 capital to risk-weighted assets. In addition to the capital requirements, the Federal Deposit Insurance Corporation Improvement Act (“FDICIA”) established five capital categories ranging from “well capitalized” to “critically undercapitalized.” Should any institution fail to meet the requirements to be considered “adequately capitalized,” it would become subject to a series of increasingly restrictive regulatory actions. Management believes that, as of September 30, 2018, the Bank met all capital adequacy requirements to which it is subject. In July of 2013 the respective U.S. federal banking agencies issued final rules implementing Basel III and the Dodd-Frank Act capital requirements to be fully-phased in on a global basis on January 1, 2019. The new regulations established a new tangible common equity capital requirement, increase the minimum requirement for the current Tier 1 risk-weighted asset (“RWA”) ratio, phase out certain kinds of tangibles treated as capital and certain types of instruments and change the risk weightings of certain assets used to determine requirement capital ratios. Provisions of the Dodd-Frank Act generally require these capital rules to apply to bank holding companies and their subsidiaries. The new common equity Tier 1 capital component requires capital of the highest quality-predominantly composed of retained earnings and common stock instruments. For community banks, such as ESSA Bank & Trust, a common equity Tier 1 capital ratio of 4.5% became effective on January 1, 2015. The new capital rules also increased the current minimum of Tier 1 capital ratio from 4.0% to 6.0% beginning on January 1, 2015. In addition, in order to make capital distributions and pay discretionary bonuses to executive officers without restriction, an institution must also maintain greater than 2.5% in common equity attributable to a capital conservation buffer to be phased in from January 1, 2016 until January 1, 2019. The new rules also increase the risk weights for several categories of assets, including an increase from 100% to 150% for certain acquisition, development and construction loans and more than 90-day past due exposures. The new capital rules maintain the general structure of the prompt corrective action rules, but incorporate the new common equity Tier 1 capital requirement and the increased Tier 1 RWA requirement into the prompt corrective action framework. Bank holding companies are generally subject to statutory capital requirements, which were implemented by certain of the new capital regulations described above that became effective on January 1, 2015. However, the Small Banking Holding Company Policy Statement exempts certain small bank holding companies like the Company from those requirements provided that they meet certain conditions. As of September 30, 2018 and 2017, the FDIC categorized the Bank and the Federal Reserve categorized the Company as well capitalized under the regulatory framework for prompt corrective action. To be classified as a well-capitalized financial institution, Total risk-based, Tier 1 risk-based, common equity Tier 1 capital and Tier 1 leverage capital must be at least 10 percent, 8 percent, 6.5 percent, and 5 percent, respectively. There have been no conditions or events since the notification that management believes have changed the Bank’s or the Company’s category. The Bank’s actual capital ratios are presented in the following table (dollars in thousands): 2018 2017 Amount Ratio Amount Ratio Total capital (to risk-weighted assets) Actual $ 180,203 13.6 % $ 170,325 14.0 % For capital adequacy purposes 105,926 8.0 97,458 8.0 To be well capitalized 132,407 10.0 121,822 10.0 Tier 1 capital (to risk-weighted assets) Actual $ 168,161 12.7 % $ 160,605 13.2 % For capital adequacy purposes 79,444 6.0 73,093 6.0 To be well capitalized 105,926 8.0 97,458 8.0 Common equity tier 1 capital (to risk-weighted assets) Actual $ 168,161 12.7 % $ 160,605 13.2 % For capital adequacy purposes 59,583 4.5 54,820 4.5 To be well capitalized 86,065 6.5 79,184 6.5 Tier 1 capital (to adjusted assets) Actual $ 168,161 9.2 % $ 160,605 9.2 % For capital adequacy purposes 72,456 4.0 69,878 4.0 To be well capitalized 90,570 5.0 87,247 5.0 The Company’s ratios do not differ significantly from the Bank’s ratios presented above.

Fair Value Measurements

Fair Value Measurements	12 Months Ended
	Sep. 30, 2018
Fair Value Disclosures [Abstract]
Fair Value Measurements	15. FAIR VALUE MEASUREMENTS 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. The following tables present information about the Company’s securities, real estate owned, and impaired loans measured at fair value as of September 30, 2018 and 2017, and indicates the fair value hierarchy of the valuation techniques utilized by the Company to determine such fair value (in thousands): September 30, 2018 Level I Level II Level III Total Assets measured at fair value on a recurring basis: Investment securities available for sale: Mortgage-backed securities $ - $ 258,123 $ - $ 258,123 Obligations of states and political subdivisions - 40,949 - 40,949 U.S. government agency securities - 5,558 - 5,558 Corporate obligations - 39,677 7,738 47,415 Other debt securities - 19,373 - 19,373 Equity securities - financial services 20 - - 20 Total securities 20 363,680 7,738 371,438 Derivatives and hedging activities - 2,452 - 2,452 Assets measured at fair value on a nonrecurring basis: Foreclosed real estate owned - - 1,141 1,141 Impaired loans - - 11,557 11,557 September 30, 2017 Level I Level II Level III Total Assets measured at fair value on a recurring basis: Investment securities available for sale: Mortgage-backed securities $ - $ 233,823 $ - $ 233,823 Obligations of states and political subdivisions - 65,358 - 65,358 U.S. government agency securities - 18,671 - 18,671 Corporate obligations - 41,518 7,224 48,742 Other debt securities - 23,833 - 23,833 Equity securities - financial services 25 - - 25 Total securities 25 383,203 7,224 390,452 Derivatives and hedging activities - 1,215 - 1,215 Assets measured at fair value on a nonrecurring basis: Foreclosed real estate owned - - 1,424 1,424 Impaired loans - - 15,231 15,231 The following table presents a summary of changes in the fair value of the Company’s Level III investments for the years ended September 30, 2018 and 2017 (in thousands). Fair Value Measurement Using Significant Unobservable Inputs (Level III) September 30, 2018 September 30, 2017 Beginning balance $ 7,224 $ 7,485 Purchases, sales, issuances, settlements, net 500 - Total unrealized gain: Included in earnings - - Included in other comprehensive income 14 4 Transfers into Level III - 750 Transfers out of Level III - (1,015 ) $ 7,738 $ 7,224 One investment security totaling $750,000 was transferred into Level III investments for the year ended September 30, 2017 because market pricing is no longer available. One investment security for $1.0 million was transferred out of Level III investments for the year ended September 30, 2017 because market pricing is available and it no longer meets the definition of a Level III investment. Financial assets and liabilities must be identified as having been valued according to a specified level of input, I, II, or III. Level I 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 II inputs utilize inputs other than quoted prices included in Level I that are observable for the asset, either directly or indirectly. Level II 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 III 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 comparables. 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 II 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 I inputs are limited to actively traded equity securities whose market price is readily available from the New York Stock Exchange or the Nasdaq Stock Market. The following table presents additional quantitative information about assets measured at fair value on a nonrecurring basis and for which the Company has utilized Level III inputs to determine fair value (dollars in thousands): Quantitative Information About Level III Fair Value Measurements Fair Value Estimate Valuation Techniques Unobservable Input Range (Weighted September 30, 2018 Impaired loans $ 11,557 Appraisal of collateral (1) Appraisal adjustments (2) 0% to 35% (25.3%) Foreclosed real estate owned 1,141 Appraisal of collateral (1) Appraisal adjustments (2) 20% to 46% (23.7%) September 30, 2017 Impaired loans $ 15,231 Appraisal of collateral (1) Appraisal adjustments (2) 0% to 57% (24.0%) Foreclosed real estate owned 1,424 Appraisal of collateral (1) Appraisal adjustments (2) 20% to 46% (22.1%) (1) Fair value is generally determined through independent appraisals of the underlying collateral, which generally include various Level III 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 is presented as a percent of the appraisal. Investment Securities Available for Sale The fair value of securities available for sale are determined by obtaining quoted market prices on nationally recognized securities exchanges (Level 1), or matrix pricing (Level 2), which is a mathematical technique used widely in the industry to value debt securities without relying exclusively on quoted market prices for the specific securities but rather by relying on the securities’ relationship to other benchmark quoted prices. For certain securities which are not traded in active markets or are subject to transfer restrictions, valuations are adjusted to reflect illiquidity and/or non-transferability, and such adjustments are generally based on available market evidence (Level 3). In the absence of such evidence, management’s best estimate is used. Management’s best estimate consists of both internal and external support on certain Level 3 investments. Internal cash flow models using a present value formula that includes assumptions market participants would use along with indicative exit pricing obtained from broker/dealers (where available) are used to support fair values of certain Level 3 investments, if applicable. Impaired Loans The Company has measured impairment on impaired loans generally based on the fair value of the loan’s collateral. Evaluating impaired loan collateral is based on Level II inputs utilizing outside appraisals. Those impaired loans for which management incorporates significant adjustments for sales costs and other discount assumptions regarding market conditions are considered Level III fair values. The fair value consists of the loan balances of $11.9 million less their valuation allowances of $313,000 at September 30, 2018. The fair value consists of the loan balances of $15.6 million less their valuation allowances of $345,000 at September 30, 2017. Foreclosed Real Estate Owned Foreclosed real estate owned 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 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. Derivatives 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. The fair value of the swap asset and liability is based on an external derivative model using data inputs as of the valuation date and are classified Level 2.

Fair Value of Financial Instrum

Fair Value of Financial Instruments	12 Months Ended
	Sep. 30, 2018
Fair Value Disclosures [Abstract]
Fair Value of Financial Instruments	16. FAIR VALUE OF FINANCIAL INSTRUMENTS The fair values of the Company’s financial instruments are as follows (in thousands): September 30, 2018 Carrying Value Level I Level II Level III Total Fair Value Financial assets: Cash and cash equivalents $ 43,539 $ 43,539 $ - $ - $ 43,539 Certificates of deposit 500 - - 505 505 Investment and mortgage-backed securities available for sale 371,438 20 363,680 7,738 371,438 Loans receivable, net 1,305,071 - - 1,269,127 1,269,127 Accrued interest receivable 6,640 6,640 - - 6,640 Regulatory stock 12,973 12,973 - - 12,973 Mortgage servicing rights 206 - - 340 340 Derivatives 2,452 - 2,452 - 2,452 Bank-owned life insurance 38,630 38,630 - - 38,630 Financial liabilities: Deposits $ 1,336,855 $ 811,607 $ - $ 520,861 $ 1,332,468 Short-term borrowings 179,773 179,773 - - 179,773 Other borrowings 118,723 - - 117,920 117,920 Advances by borrowers for taxes and insurance 6,826 6,826 - - 6,826 Accrued interest payable 1,369 1,369 - - 1,369 September 30, 2017 Carrying Value Level I Level II Level III Total Fair Value Financial assets: Cash and cash equivalents $ 41,683 $ 41,683 $ - $ - $ 41,683 Certificates of deposit 500 - - 505 505 Investment and mortgage-backed securities available for sale 390,452 25 383,203 7,224 390,452 Loans receivable, net 1,236,681 - - 1,235,368 1,235,368 Accrued interest receivable 6,149 6,149 - - 6,149 Regulatory stock 13,832 13,832 - - 13,832 Mortgage servicing rights 232 - - 310 310 Derivatives 1,215 - 1,215 - 1,215 Bank-owned life insurance 37,626 37,626 - - 37,626 Financial liabilities: Deposits $ 1,274,861 $ 763,964 $ - $ 511,392 $ 1,275,356 Short-term borrowings 137,446 137,446 - - 137,446 Other borrowings 174,168 - - 174,107 174,107 Advances by borrowers for taxes and insurance 5,163 5,163 - - 5,163 Accrued interest payable 1,043 1,043 - - 1,043 Financial instruments are defined as cash, evidence of an ownership interest in an entity, or a contract which creates an obligation or right to receive or deliver cash or another financial instrument from/to a second entity on potentially favorable or unfavorable terms. Fair value is defined as the amount at which a financial instrument could be exchanged in a current transaction between willing parties other than in a forced or liquidation sale. If a quoted market price is available for a financial instrument, the fair value would be calculated based upon the market price per trading unit of the instrument. If no readily available market exists, the fair value for financial instruments should be based upon management’s judgment regarding current economic conditions, interest rate risk, expected cash flows, future estimated losses, and other factors as determined through various option pricing formulas or simulation modeling. As many of these assumptions result from judgments made by management based upon estimates which are inherently uncertain, the resulting values may not be indicative of the amount realizable in the sale of a particular financial instrument. In addition, changes in the assumptions on which the values are based may have a significant impact on the resulting estimated values. As certain assets and liabilities, such as deferred tax assets, premises and equipment, and many other operational elements of the Company, are not considered financial instruments but have value, this fair value of financial instruments would not represent the full market value of the Company. The Company employed simulation modeling in determining the fair value of financial instruments for which quoted market prices were not available based upon the following assumptions: Cash and Cash Equivalents, Accrued Interest Receivable, Short-Term Borrowings, Advances by Borrowers for Taxes and Insurance, and Accrued Interest Payable The fair value approximates the current book value. Derivatives Fair values of interest rate swap contracts are based on dealer quotes. Bank-Owned Life Insurance The fair value is equal to the cash surrender value of the bank-owned life insurance. Investment and Mortgage-Backed Securities Available for Sale and Regulatory Stock The fair value of investment and mortgage-backed securities available for sale is equal to the available quoted market price. If no quoted market price is available, fair value is estimated using the quoted market price for similar securities. For certain securities which are not traded in active markets or are subject to transfer restrictions, valuations are adjusted to reflect illiquidity and/or non-transferability, and such adjustments are generally based on available market evidence (Level 3). In the absence of such evidence, management’s best estimate is used. Management’s best estimate consists of both internal and external support on certain Level 3 investments. Internal cash flow models using a present value formula that includes assumptions market participants would use along with indicative exit pricing obtained from broker/dealers (where available) are used to support fair values of certain Level 3 investments, if applicable. Since the regulatory stock is not actively traded on a secondary market and held exclusively by member financial institutions, the fair market value approximates the carrying amount. Certificates of Deposit, Loans Receivable, Deposits, Other Borrowings, and Mortgage Servicing Rights The fair values for loans and mortgage servicing rights are estimated by discounting contractual cash flows and adjusting for prepayment estimates. Discount rates are based upon rates generally charged for such loans with similar characteristics. Demand, savings, and money market deposit accounts are valued at the amount payable on demand as of year-end. Fair values for certificates of deposit, time deposits, and other borrowings are estimated using a discounted cash flow calculation that applies contractual costs currently being offered in the existing portfolio to current market rates being offered for deposits and borrowings of similar remaining maturities. Commitments to Extend Credit These financial instruments are generally not subject to sale, and fair values are not readily available. The carrying value, represented by the net deferred fee arising from the unrecognized commitment, and the fair value, determined by discounting the remaining contractual fee over the term of the commitment using fees currently charged to enter into similar agreements with similar credit risk, are not considered material for disclosure. The contractual amounts of unfunded commitments are presented in Note 10.

Accumulated Other Comprehensive

Accumulated Other Comprehensive Income (Loss)	12 Months Ended
	Sep. 30, 2018
Equity [Abstract]
Accumulated Other Comprehensive Income (Loss)	17. ACCUMULATED OTHER COMPREHENSIVE INCOME (LOSS) The activity in accumulated other comprehensive income (loss) for the years ended September 30, 2018 and 2017, is as follows (in thousands): Accumulated Other Comprehensive Income (Loss) (1) Defined Benefit Pension Plan Unrealized Gains (Losses) on Securities Available for Sale Derivatives Total Balance at September 30, 2017 $ (628 ) $ (927 ) $ 801 $ (754 ) Other comprehensive income (loss) before reclassifications 275 (9,883 ) 1,269 (8,339 ) Amounts reclassified from accumulated other comprehensive loss - (123 ) (348 ) (471 ) Period change 275 (10,006 ) 921 (8,810 ) Reclassification of certain income tax effects from other comprehensive (loss) income (124 ) (436 ) 214 (346 ) Balance at September 30, 2018 $ (477 ) $ (11,369 ) $ 1,936 $ (9,910 ) Balance at September 30, 2016 $ (6,083 ) $ 3,952 $ 299 $ (1,832 ) Other comprehensive income (loss) before reclassifications and pension plan curtailment 2,284 (4,684 ) 505 (1,895 ) Pension plan curtailment 3,022 - - 3,022 Amounts reclassified from accumulated other comprehensive income (loss) 149 (195 ) (3 ) (49 ) Period change 5,455 (4,879 ) 502 1,078 Balance at September 30, 2017 $ (628 ) $ (927 ) $ 801 $ (754 ) (1) All amounts are net of tax. Related income tax expense or benefit is calculated using an income tax rate approximating 24.3 % in Fiscal 2018 and 34.0% in Fiscal 2017. Details About Accumulated Other Comprehensive Loss Components Amount Reclassified from Accumulated Other Comprehensive Loss For the Year Ended September 30, (4) Affected Line Item in the Consolidated (in thousands) 2018 2017 Statement of Income Securities available for sale (1) Net securities gains reclassified into earnings $ 162 $ 295 Gain on sale of investments, net Related income tax expense (39 ) (100 ) Income taxes Net effect on accumulated other comprehensive loss for the period 123 195 Defined benefit pension plan (2) Amortization of net (loss) gain and prior service costs - (226 ) Compensation and employee benefits Related income tax expense - 77 Income taxes Net effect on accumulated other comprehensive loss for the period - (149 ) Derivatives and Hedging Activities (3) Interest expense, effective portion 459 5 Interest expense Related income tax expense (111 ) (2 ) Income taxes Net effect on accumulated other comprehensive loss for the period 348 3 Total reclassifications for the period $ 471 $ 49 (1) For additional details related to unrealized gains on securities and related amounts reclassified from accumulated other comprehensive income (loss) see Note 3, “Investment Securities.” (2) Included in the computation of net periodic pension cost. See Note 12, “Employee Benefits” for additional detail. (3) For additional details related to derivative financial instruments see Note18, “Derivatives and Hedging Activities.” (4) Amounts in parenthesis indicate debits.

Derivative and Hedging Activiti

Derivative and Hedging Activities	12 Months Ended
	Sep. 30, 2018
Derivative Instruments And Hedging Activities Disclosure [Abstract]
Derivatives and Hedging Activities	18. DERIVATIVES AND HEDGING ACTIVITIES Risk Management Objective of Using Derivatives The Company is exposed to certain risk 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 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. 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 September 30, 2018 and 2017, (in thousands). Fair Values of Derivative Instruments Asset Derivatives As of September 30, 2018 As of September 30, 2017 Notional Amount Balance Sheet Location Fair Value Notional Amount Balance Sheet Location Fair Value Derivatives designated as hedging instruments Interest Rate Products $ 100,000 Other Assets $ 2,595 $ 75,000 Other Assets $ 1,215 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 September 30, 2018, the Company had six interest rate swaps with a notional of $100 million associated with the Company’s cash outflows associated with various FHLB advances. As of September 30, 2017, the Company had five interest rate swaps with a notional of $75 million associated with the company’s cash outflows associated with carious FHLB advances. 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 September 30, 2018 and 2017. Amounts reported in accumulated other comprehensive income related to derivatives will be reclassified to interest income/expense as interest payments are made/received on the Company’s variable-rate assets/liabilities. During the years ended September 30, 2018 and 2017, the Company had $459,000 and $13,000 of reclassifications to interest expense, respectively. During the next twelve months, the Company estimates that $1.1 million The table below presents the effect of the Company’s cash flow hedge accounting on Accumulated Other Comprehensive Income for the periods ended September 30, 2018 and 2017 (in thousands). The Effect of Fair Value and Cash Flow Hedge Accounting on Accumulated Other Comprehensive Income Derivatives in Hedging Relationships Amount of Gain Recognized in OCI on Derivative Amount of Gain Reclassified from Accumulated OCI into Income Year Ended September 30, Year Ended September 30, Location of Gain Reclassified from Year Ended September 30, Year Ended September 30, 2018 2017 Accumulated OCI into Income 2018 2017 Derivatives in Cash Flow Hedging Relationships Interest Rate Products $ 1,696 $ 930 Interest Expense $ 459 $ 13 Total $ 1,696 $ 930 $ 459 $ 13 The table below presents the effect of the Company’s derivative financial instruments on the Income Statement for the year to date periods ended September 30, 2018 and 2017. Location and Amount of Gain Recognized in Income on Fair Value and Cash Flow Hedging Relationships Year Ended September 30, 2018 Year Ended September 30, 2017 Interest Income (Expense) Other Income (Expense) Interest Income (Expense) Other Income (Expense) Total amounts of income and expense line items presented in the statement of financial performance in which the effects of fair value or cash flow hedges are recorded $ 459 $ - $ 13 $ - The effects of fair value and cash flow hedging: Gain in cash flow hedging relationships Interest contracts Amount of gain reclassified from accumulated other comprehensive income into income $ 459 $ - $ 13 $ - The table below presents a gross presentation, the effects of offsetting, and a net presentation of the Company’s derivatives for the periods ended September 30, 2018 and 2017. The net amounts of derivative assets or liabilities can be reconciled on the tabular disclosure of fair value. The tabular disclosure of fair value provides the location the derivative assets and liabilities are presented on the Balance Sheet. There were no derivative liabilities for the periods ended September 20, 2018 and 2017. Offsetting of Derivative Assets as of September 30, 2018 Gross Amounts Not Offset in the Statement of Financial Position Gross Amounts of Recognized Assets Gross Amounts Offset in the Statement of Financial Position Net Amounts of Assets presented in the Statement of Financial Position Financial Instruments Cash Collateral Received Net Amount Derivatives $ 2,595 $ - $ 2,595 $ - $ 2,540 $ 55 Offsetting of Derivative Assets as of September 30, 2017 Gross Amounts Not Offset in the Statement of Financial Position Gross Amounts of Recognized Assets Gross Amounts Offset in the Statement of Financial Position Net Amounts of Assets presented in the Statement of Financial Position Financial Instruments Cash Collateral Received Net Amount Derivatives $ 1,240 $ - $ 1,240 $ - $ 970 $ 270 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.

Parent Company

Parent Company	12 Months Ended
	Sep. 30, 2018
Condensed Financial Information Of Parent Company Only Disclosure [Abstract]
Parent Company	19 . PARENT COMPANY Condensed financial statements of ESSA Bancorp, Inc. are as follows (in thousands): CONDENSED BALANCE SHEET September 30, 2018 2017 ASSETS Cash and due from banks $ 3,713 $ 5,034 Investment securities available for sale 20 25 Investment in subsidiary 173,431 175,127 Premises and equipment, net 431 1,093 Other assets 1,705 1,577 TOTAL ASSETS $ 179,300 $ 182,856 LIABILITIES AND STOCKHOLDERS’ EQUITY Other liabilities $ 114 $ 129 Stockholders’ equity 179,186 182,727 TOTAL LIABILITIES AND STOCKHOLDERS’ EQUITY $ 179,300 $ 182,856 CONDENSED STATEMENT OF INCOME Year Ended September 30, 2018 2017 INCOME Interest income $ 517 $ 426 Total income 517 426 EXPENSES Professional fees 431 455 Other 388 51 Total expenses 819 506 Loss before income tax expense (302 ) (80 ) Income tax benefit (73 ) (27 ) Loss before equity in undistributed net earnings of subsidiary (229 ) (53 ) Equity in undistributed net earnings of subsidiary 6,760 7,392 NET INCOME $ 6,531 $ 7,339 COMPREHENSIVE (LOSS)INCOME $ (2,279 ) $ 8,417 CONDENSED STATEMENT OF CASH FLOWS Year Ended September 30, 2018 2017 OPERATING ACTIVITIES Net income $ 6,531 $ 7,339 Adjustments to reconcile net income to net cash provided by operating activities: Equity in undistributed net earnings of subsidiary (6,760 ) (7,391 ) Provision for depreciation 23 25 (Increase) decrease in accrued income taxes 73 (34 ) (Increase) decrease in accrued interest receivable (56 ) 1 Deferred federal income taxes 2 (5 ) Loss on disposal of fixed assets 340 - Other, net 564 974 Net cash provided by operating activities 717 909 INVESTING ACTIVITIES Sale of premises, equipment and software 299 - Net cash used for investing activities 299 - FINANCING ACTIVITIES Proceeds from the exercise of stock options 1,575 779 Dividends on common stock (3,912 ) (3,830 ) Net cash used for financing activities (2,337 ) (3,051 ) Decrease in cash (1,321 ) (2,142 ) CASH AT BEGINNING OF YEAR 5,034 7,176 CASH AT END OF YEAR $ 3,713 $ 5,034

Selected Quarterly Data (Unaudi

Selected Quarterly Data (Unaudited)	12 Months Ended
	Sep. 30, 2018
Quarterly Financial Information Disclosure [Abstract]
Selected Quarterly Data (Unaudited)	20. SELECTED QUARTERLY DATA (UNAUDITED) Three Months Ended December 31, 2017 March 31, 2018 June 30, 2018 September 30, 2018 Total interest income $ 15,376 $ 15,847 $ 16,718 $ 16,562 Total interest expense 3,608 3,912 4,156 4,592 Net interest income 11,768 11,935 12,562 11,970 Provision for loan losses 1,000 1,100 975 925 Net interest income after provision for loan losses 10,768 10,835 11,587 11,045 Total noninterest income 1,969 1,945 1,897 2,002 Total noninterest expense 10,282 9,988 10,163 9,420 Income before income taxes 2,455 2,792 3,321 3,627 Income taxes expense 4,093 529 500 542 Net income $ (1,638 ) $ 2,263 $ 2,821 $ 3,085 Per share data: Net income Basic $ (0.15 ) $ 0.21 $ 0.26 $ 0.28 Diluted $ (0.15 ) $ 0.21 $ 0.26 $ 0.28 Average shares outstanding Basic 10,717,138 10,796,353 10,911,469 10,970,947 Diluted 10,717,138 10,822,109 10,922,860 10,970,947 Three Months Ended December 31, 2016 March 31, 2017 June 30, 2017 September 30, 2017 Total interest income $ 14,650 $ 14,379 $ 14,408 $ 14,881 Total interest expense 3,018 3,075 3,248 3,458 Net interest income 11,632 11,304 11,160 11,423 Provision for loan losses 750 750 750 1,100 Net interest income after provision for loan losses 10,882 10,554 10,410 10,323 Total noninterest income 1,857 1,784 2,120 2,438 Total noninterest expense 10,402 10,504 10,320 10,212 Income before income taxes 2,337 1,834 2,210 2,549 Income taxes benefit 400 203 448 540 Net income $ 1,937 $ 1,631 $ 1,762 $ 2,009 Per share data: Net income Basic $ 0.18 $ 0.15 $ 0.16 $ 0.19 Diluted $ 0.18 $ 0.15 $ 0.16 $ 0.19 Average shares outstanding Basic 10,475,032 10,592,997 10,678,856 10,704,554 Diluted 10,604,072 10,691,960 10,743,008 10,766,159

Summary of Significant Accoun_2

Summary of Significant Accounting Policies (Policies)	12 Months Ended
	Sep. 30, 2018
Accounting Policies [Abstract]
Nature of Operations and Basis of Presentation	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. On November 6, 2014, the Company converted its status from a savings and loan holding company to a bank holding company. In addition, the Bank converted from a Pennsylvania-chartered savings association to a Pennsylvania-chartered savings bank. The Bank’s primary business consists of the taking of deposits and granting of loans to customers generally in Monroe, Northampton, Lehigh, Lackawanna, Luzerne, Delaware, Chester, and Montgomery counties, Pennsylvania. The Bank is subject to regulation and supervision by the Pennsylvania Department of Banking and Securities and the Federal Deposit Insurance Corporation. The investment in subsidiary 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.
Use of Estimates in the Preparation of Financial Statements	Use of Estimates in the Preparation of Financial Statements The accounting principles followed by the Company and its subsidiary and the methods of applying these principles conform to U.S. generally accepted accounting principles and to general practice within the banking industry. In preparing the consolidated financial statements, the Company 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.
Securities	Securities The Company determines the appropriate classification of debt securities at the time of purchase and reevaluates such designation as of each balance sheet date. Securities classified as available for sale are those securities that the Company intends to hold for an indefinite period of time but not necessarily to maturity. Any decision to sell a security classified as available for sale would be based on various factors, including significant movement in interest rates, changes in maturity mix of the Company’s assets and liabilities, liquidity needs, regulatory capital considerations, and other similar factors. Securities available for sale are carried at fair value. Unrealized gains and losses are reported in other comprehensive income (loss), net of the related deferred tax effects. Realized gains or losses, determined on the basis of the cost of the specific securities sold, are included in earnings. Premiums and discounts are recognized in interest income using the interest method over the period to maturity. Declines in the fair value of available-for-sale securities below their cost that are deemed to be other than temporary are reflected in earnings as realized losses. In estimating other-than-temporary impairment losses, the Company considers: (1) the length of time and the extent to which the fair value has been less than cost; (2) the financial condition and near-term prospects of the issuer; and (3) the Company’s intent to sell the security or whether it’s more likely than not that the Company would be required to sell the security before its anticipated recovery in market value.
Loans Receivable	Loans Receivable Loans receivable that the Company has the intent and ability to hold for the foreseeable future or until maturity or payoff are stated at their outstanding unpaid principal balances, net of an allowance for loan losses and any deferred fees and costs. Interest income is accrued on the unpaid principal balance. Loan origination fees, net of certain direct origination costs, are deferred and recognized as an adjustment of the yield (interest income) of the related loans. The Company is generally amortizing these amounts over the contractual life of the loan. The accrual of interest is generally discontinued when the contractual payment of principal or interest has become 90 days past due or the Company has serious doubts about further collectability of principal or interest, even though the loan is currently performing. A loan may remain on accrual status if it is in the process of collection and is either guaranteed or well secured. When a loan is placed on nonaccrual status, unpaid interest credited to income is reversed. Interest received on nonaccrual loans generally is either applied against principal or reported as interest income, according to the Company’s judgment as to the collectability of principal. Generally, loans are restored to accrual status when the obligation is brought current and has performed in accordance with the contractual terms for a reasonable period of time and the ultimate collectability of the total contractual principal and interest is no longer in doubt.
Loans Acquired	Loans Acquired Loans acquired including loans that have evidence of deterioration of credit quality since origination and for which it is probable, at acquisition, that the Company will be unable to collect all contractually required payments receivable, are initially recorded at fair value (as determined by the present value of expected future cash flows) with no valuation allowance. Loans are evaluated individually to determine if there is evidence of deterioration of credit quality since origination. The difference between the undiscounted cash flows expected at acquisition and the investment in the loan, or the “accretable yield,” is recognized as interest income on a level-yield method over the life of the loan. Contractually required payments for interest and principal that exceed the undiscounted cash flows expected at acquisition, or the “non-accretable difference,” are not recognized as a yield adjustment or as a loss accrual or a valuation allowance. Increases in expected cash flows subsequent to the initial investment are recognized prospectively through adjustment of the yield on the loan over its remaining estimated life. Decreases in expected cash flows are recognized immediately as impairment. Any valuation allowances on these impaired loans reflect only losses incurred after acquisition. For purchased loans acquired that are not deemed impaired at acquisition, credit discounts representing the principal losses expected over the life of the loan are a component of the initial fair value. Loans are aggregated and accounted for as a pool of loans if the loans being aggregated have common risk characteristics. Subsequent to the purchase date, the methods utilized to estimate the required allowance for credit losses for these loans is similar to originated loans; however, the Company records a provision for loan losses only when the required allowance exceeds any remaining credit discounts. The remaining differences between the purchase price and the unpaid principal balance at the date of acquisition are recorded in interest income over the life of the loans.
Allowance for Loan Losses	Allowance for Loan Losses The allowance for loan losses is established through provisions for loan losses charged against income. Loans deemed to be uncollectible are charged against the allowance for loan losses, and subsequent recoveries, if any, are credited to the allowance. The allowance for loan losses is maintained at a level by management which represents the evaluation of known and inherent risks in the loan portfolio at the Consolidated Balance Sheet date. Management’s periodic evaluation of the adequacy of the allowance is based on the Company’s past loan loss experience, known and inherent risks in the portfolio, adverse situations that may affect the borrower’s ability to repay, the estimated value of any underlying collateral, composition of the loan portfolio, current economic conditions, and other relevant factors. This evaluation is inherently subjective, since it requires material estimates that may be susceptible to significant change, including the amounts and timing of future cash flows expected to be received on impaired loans. The allowance consists of specific and general components. The specific component relates to loans that are classified as impaired. For such loans an allowance is established when the discounted cash flows (or collateral value or observable market price) of the impaired loan is lower than the carrying value of that loan. The general component covers nonclassified loans and is based on historical loss experience adjusted for qualitative factors. All loans are considered impaired when, based on current information and events, it is probable that the Company will be unable to collect the scheduled payments of principal or interest when due according to the contractual terms of the loan agreement and all loan types are considered impaired if the loan is restructured in a troubled debt restructuring. Factors considered by management in determining impairment include payment status, collateral value, and the probability of collecting scheduled principal and interest payments when due. Loans that experience insignificant payment delays and payment shortfalls generally are not classified as impaired. Management determines the significance of payment delays and payment shortfalls on a case-by-case basis, taking into consideration all of the circumstances surrounding the loan and the borrower, including the length of the delay, the reasons for the delay, the borrower’s prior payment record, and the amount of the shortfall in relation to the principal and interest owed. 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 classified as a troubled debt restructuring or is more than 180 days past due. A loan is considered to be a troubled debt restructuring (“TDR”) loan when the Company grants a concession to the borrower because of the borrower’s financial condition that it would not otherwise consider. 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 may be removed from the TDR status after one year of performance.
Regulatory Stock	Regulatory Stock Regulatory stock consists of Federal Home Loan Bank (“FHLB”) of Pittsburgh stock and Atlantic Community Bankers Bank stock. Regulatory stock is carried at cost. The Company is a member of the Federal Home Loan Bank System and holds stock in the Federal Home Loan Bank of Pittsburgh. As a member, the Company maintains an investment in the capital stock of the FHLB of Pittsburgh in an amount not less than 10 basis points of the outstanding member asset value plus 4.0 percent of its outstanding FHLB borrowings, as calculated throughout the year. The equity security is accounted for at cost and classified separately on the Consolidated Balance Sheet. The stock is bought from and sold to the FHLB based upon its $100 par value. The stock does not have a readily determinable fair value and as such is classified as restricted stock, carried at cost and evaluated by management. The stock’s value is determined by the ultimate recoverability of the par value rather than by recognizing temporary declines. The determination of whether the par value will ultimately be recovered is influenced by criteria such as the following: (a) The significance of the decline in net assets of the FHLB as compared to the capital stock amount and the length of time this situation has persisted; (b) commitments by the FHLB to make payments required by law or regulation and the level of such payments in relation to the operating performance; (c) the impact of legislative and regulatory changes on the customer base of the FHLB; and (d) the liquidity position of the FHLB. With consideration given to these factors, management concluded that the stock was not impaired at September 30, 2018.
Loan Servicing	Loan Servicing Servicing assets are recognized as separate assets when rights are acquired through purchase or through sale of financial assets. Capitalized servicing rights are reported in other assets and are amortized into noninterest income in proportion to, and over the period of, the estimated future net servicing income of the underlying financial assets. Servicing assets are evaluated for impairment based upon a third-party appraisal. Fair value is determined using prices for similar assets with similar characteristics, when available, or based upon discounted cash flows using market-based assumptions. Impairment is recognized through a valuation allowance to the extent that fair value is less than the capitalized amount. The Company’s loan servicing assets at September 30, 2018 and 2017, were not impaired. Total servicing assets included in other assets as of September 30, 2018 and 2017, were $206,000 and $232,000, respectively.
Premises and Equipment	Premises and Equipment Land is carried at cost. Premises and equipment are stated at cost less accumulated depreciation. Depreciation is calculated using the straight-line method over the useful lives of the related assets, which range from 10 to 40 years for buildings, land improvements, and leasehold improvements and 3 to 7 years for furniture, fixtures, and equipment. Expenditures for maintenance and repairs are charged to operations as incurred. Costs of major additions and improvements are capitalized.
Derivative Instruments and Hedging Activities	Derivative Instruments and Hedging Activities FASB ASC 815, Derivatives and Hedging (“ASC 815”), provides the disclosure requirements for derivatives and hedging activities with the intent to provide users of financial statements with an enhanced understanding of: (a) how and why an entity uses derivative instruments, (b) how the entity accounts for derivative instruments and related hedged items, and (c) how derivative instruments and related hedged items affect an entity’s financial position, financial performance, and cash flows. Further, qualitative disclosures are required that explain the Company’s objectives and strategies for using derivatives, as well as quantitative disclosures about the fair value of and gains and losses on derivative instruments, and disclosures about credit-risk-related contingent features in derivative instruments. As required by ASC 815, the Company records all derivatives on the balance sheet at fair value. The accounting for changes in the fair value of derivatives depends on the intended use of the derivative, whether the Company has elected to designate a derivative in a hedging relationship and apply hedge accounting and whether the hedging relationship has satisfied the criteria necessary to apply hedge accounting. Derivatives designated and qualifying as a hedge of the exposure to changes in the fair value of an asset, liability, or firm commitment attributable to a particular risk, such as interest rate risk, are considered fair value hedges. Derivatives designated and qualifying as a hedge of the exposure to variability in expected future cash flows, or other types of forecasted transactions, are considered cash flow hedges. Derivatives may also be designated as hedges of the foreign currency exposure of a net investment in a foreign operation. Hedge accounting generally provides for the matching of the timing of gain or loss recognition on the hedging instrument with the recognition of the changes in the fair value of the hedged asset or liability that are attributable to the hedged risk in a fair value hedge or the earnings effect of the hedged forecasted transactions in a cash flow hedge. The Company may enter into derivative contracts that are intended to economically hedge certain of its risk, even though hedge accounting does not apply or the Company elects not to apply hedge accounting. In accordance with the FASB’s fair value measurement guidance, the Company has elected to measure the credit risk of its derivative financial instruments that are subject to master netting agreements on a net basis by counterparty portfolio.
Bank-Owned Life Insurance ("BOLI")	Bank-Owned Life Insurance (“BOLI”) The Company owns insurance on the lives of a certain group of key employees. The policies were purchased to help offset the increase in the costs of various fringe benefit plans, including healthcare. The cash surrender value of these policies is included as an asset on the Consolidated Balance Sheet, and any increase in cash surrender value is recorded as noninterest income on the Consolidated Statement of Income. In the event of the death of an insured individual under these policies, the Company would receive a death benefit which would be recorded as noninterest income.
Foreclosed Real Estate	Foreclosed Real Estate Real estate owned acquired in settlement of foreclosed loans is carried at fair value minus estimated costs to sell. At acquisition of real estate acquired in settlement of foreclosed loans, the excess of the remaining loan balance over the asset’s estimated fair value less cost to sell is charged off against the allowance for loan losses. Subsequent declines in the asset’s value are recognized as noninterest expense in the Consolidated Statement of Income. Operating expenses of such properties, net of related income, are expensed in the period incurred.
Goodwill and Intangible Assets	Goodwill and Intangible Assets Goodwill is not amortized, but it is tested at least annually for impairment in the fourth quarter, or more frequently if indicators of impairment are present. If the estimated current fair value of a reporting unit exceeds its carrying value, no additional testing is required and an impairment loss is not recorded. The Company uses market capitalization and multiples of tangible book value methods to determine the estimated current fair value of its reporting unit. Based on this analysis, no impairment was recorded in 2018 or 2017. The other intangible assets are assigned useful lives, which are amortized on an accelerated basis over their weighted-average lives. The Company periodically reviews intangible assets for impairment as events or changes in circumstances indicate that the carrying amount of such asset may not be recoverable. Based on these reviews, no impairment was recorded in 2018 and 2017. The following tables provide information for the carrying amount of goodwill and intangible assets (in thousands). Goodwill 2018 2017 Balance at beginning of year $ 13,801 $ 13,801 Goodwill acquired - - Balance at end of year $ 13,801 $ 13,801 Intangible assets 2018 2017 Balance at beginning of year $ 1,844 $ 2,487 Intangible assets acquired - - Amortization (469 ) (643 ) Balance at end of year $ 1,375 $ 1,844 Amortizable intangible assets were composed of the following: September 30, 2018 2017 Gross Amount Accumulated Amortization (dollars in thousands) Core deposit intangible $ 4,787 $ 3,412 $ 2,943 2018 2017 Aggregate amortization expense: As of the years ended September 30 $ 469 $ 643 Estimated future amortization expense (dollars in thousands): 2019 $ 309 2020 275 2021 272 2022 239 2023 190 2024 90 $ 1,375
Employee Benefit Plans	Employee Benefit Plans The Bank maintains a noncontributory, defined benefit pension plan for all employees who have met age and length of service requirements. The Bank also maintains a defined contribution Section 401(k) plan covering eligible employees. The Company created an ESOP for the benefit of employees who meet certain eligibility requirements. The Company makes cash contributions to the ESOP on an annual basis. The Company maintains an equity incentive plan to provide for issuance or granting of shares of common stock for stock options or restricted stock. The Company has recorded stock-based employee compensation cost using the fair value method as allowed under generally accepted accounting principles. Management estimated the fair values of all option grants using the Black-Scholes option-pricing model. Management estimated the expected life of the options using the simplified method as allowed under generally accepted accounting principles. The risk-free rate was determined utilizing the treasury yield for the expected life of the option contract.
Advertising Costs	Advertising Costs In accordance with generally accepted accounting principles, the Company expenses all advertising expenditures incurred.
Transfers of Financial Assets	Transfers of Financial Assets Transfers of financial assets are accounted for as sales when control over the assets has been surrendered. Control over transferred assets is deemed to be surrendered when (1) the assets have been isolated from the Company; (2) the transferee obtains the right (free of conditions that constrain it from taking advantage of that right) to pledge or exchange the transferred assets; and (3) the Company does not maintain effective control over the transferred assets through an agreement to repurchase them before their maturity.
Income Taxes	Income Taxes Deferred tax assets and liabilities are reflected based on the differences between the financial statement and the income tax basis of assets and liabilities using the enacted marginal tax rates. Deferred income tax expense and benefit are based on the changes in the deferred tax assets or liabilities from period to period. Deferred tax assets and liabilities are reflected at currently enacted income tax rates applicable to the period in which such items are expected to be realized or settled. As changes in tax rates are enacted, deferred tax assets and liabilities are adjusted through the provision for income taxes. The Company files a consolidated federal income tax return and individual state income tax returns. The Company prescribes a recognition threshold and a measurement attribute for the financial statement recognition and measurement of a tax position taken or expected to be taken in a tax return. Benefits from tax positions should be recognized in the financial statements only when it is more likely than not that the tax position will be sustained upon examination by the appropriate taxing authority that would have full knowledge of all relevant information. A tax position that meets the more-likely-than-not recognition threshold is measured at the largest amount of benefit that is greater than 50 percent likely of being realized upon ultimate settlement. Tax positions that previously failed to meet the more-likely-than-not recognition threshold should be recognized in the first subsequent financial reporting period in which that threshold is met. Previously recognized tax positions that no longer meet the more-likely-than-not recognition threshold should be derecognized in the first subsequent financial reporting period in which that threshold is no longer met.
Cash and Cash Equivalents	Cash and Cash Equivalents The Company has defined cash and cash equivalents as cash and due from banks and interest-bearing deposits with other institutions with original maturities of less than 90 days.
Earnings Per Share	Earnings Per Share The Company provides dual presentation of basic and diluted earnings per share. Basic earnings per share are calculated utilizing net income as reported as the numerator and average shares outstanding as the denominator. The computation of diluted earnings per share differs in that the dilutive effects of any options are adjusted for in the denominator.
Comprehensive Income (Loss)	Comprehensive Income (Loss) The Company is required to present comprehensive income (loss) and its components in a full set of general-purpose financial statements for all periods presented. Other comprehensive income (loss) is composed of net unrealized holding gains or losses on its available-for-sale investment and mortgage-backed securities portfolio and derivative instruments, and changes in unrecognized pension cost.
Fair Value Measurements	Fair Value Measurements The Company groups assets and liabilities carried at fair value in three levels, based on the markets in which the assets are traded and the reliability of the assumptions used to determine fair value. These levels are: • Level I – Valuation is based upon quoted prices for identical instruments traded in active markets. • Level II – Valuation is based upon quoted prices for similar instruments in active markets, quoted prices for identical or similar instruments in markets that are not active, and model-based valuation techniques for which all significant assumptions are observable in the market. • Level III – Valuation is generated from model-based techniques that use significant assumptions not observable in the market. These unobservable assumptions reflect the Company’s own estimates of assumptions that market participants would use in pricing the asset. The Company determines fair value based on the price that would be received to sell an asset or paid to transfer a liability in an orderly transaction between market participants at the measurement date. It is our policy to maximize the use of observable inputs and minimize the use of unobservable inputs when developing fair value measurements, in accordance with the fair value hierarchy in generally accepted accounting principles. Fair value measurements for most of the Company’s assets are obtained from independent pricing services that we have engaged for this purpose. When available, the Company, or the Company’s independent pricing service, use quoted market prices to measure fair value. If market prices are not available, fair value measurement is based upon models that incorporate available trade, bid, and other market information. Subsequently, all of the Company’s financial instruments use either of the foregoing methodologies to determine fair value adjustments recorded to our financial statements. In certain cases, however, when market observable inputs for model-based valuation techniques may not be readily available, we are required to make judgments about assumptions market participants would use in estimating the fair value of financial instruments. The degree of management judgment involved in determining the fair value of a financial instrument is dependent upon the availability of quoted market prices or observable market parameters. For financial instruments that trade actively and have quoted market prices or observable market parameters, there is minimal subjectivity involved in measuring fair value. When observable market prices and parameters are not fully available, management judgment is necessary to estimate fair value. In addition, changes in the market conditions may reduce the availability of quoted prices or observable data. When market data is not available, we use valuation techniques requiring more management judgment to estimate the appropriate fair value measurement. Therefore, the results cannot be determined with precision and may not be realized in an actual sale or immediate settlement of the asset. Additionally, there may be inherent weaknesses in any calculation technique, and changes in the underlying assumptions used, including discount rates and estimates of future cash flows, that could significantly affect the results of current or future valuations.
Reclassification of Comparative Amounts	Reclassification of Comparative Amounts Certain items previously reported have been reclassified to conform to the current year’s reporting format. Such reclassifications did not affect consolidated net income or consolidated stockholders’ equity.
Adoption of New Standards	Adoption of New Standards In August 2017, the FASB issued ASU 2017-12, Derivatives and Hedging (Topic 850) In February 2018, the FASB issued ASU 2018-02, Income Statement – Reporting Comprehensive Income (Topic 220)
Recent Accounting Pronouncements	Recent Accounting Pronouncements In May 2014, the FASB issued ASU 2014-09, Revenue from Contracts with Customers In January 2016, the FASB issued ASU 2016-01, Financial Instruments – Overall (Subtopic 825-10): Recognition and Measurement of Financial Assets and Financial Liabilities In February 2016, the FASB issued ASU 2016-02, Leases (Topic 842) In April 2016, the FASB issued ASU 2016-10, Revenue from Contracts with Customers (Topic 606). Revenue from Contracts with Customers (Topic 606) Revenue from Contracts with Customers (Topic 606) Deferral of the Effective Date In May 2016, the FASB issued ASU 2016-12, Revenue from Contracts with Customers (Topic 606) Revenue from Contracts with Customers (Topic 606) Revenue from Contracts with Customers (Topic 606): Deferral of the Effective Date In June 2016, the FASB issued ASU 2016-13, Financial Instruments - Credit Losses: Measurement of Credit Losses on Financial Instruments In August 2016, the FASB issued ASU 2016-15, Statement of Cash Flows (Topic 230): Classification of Certain Cash Receipts and Cash Payments In January 2017, the FASB issued ASU 2017-04, Simplifying the Test for Goodwill Impairment In February 2017, the FASB issued ASU 2017-05, Other Income—Gains and Losses from the Derecognition of Nonfinancial Assets (Subtopic 610-20). This Update is not expected to have a significant impact on the Company’s financial statements. In March 2017, the FASB issued ASU 2017-07, Compensation—Retirement Benefits (Topic 715) Receivables – Nonrefundable Fees and Other Costs (Subtopic 310-20). The amendments in this Update shorten the amortization period for certain callable debt securities held at a premium. Specifically, the amendments require the premium to be amortized to the earliest call date. The amendments do not require an accounting change for securities held at a discount; the discount continues to be amortized to maturity. For public business entities, the amendments in this Update are effective for fiscal years, and interim periods within those fiscal years, beg For all other entities, the amendments are effective for fiscal years beginning after December 15, 2019, and interim periods within fiscal years beginning after December 15, 2020. Early adoption is permitted, including adoption in an interim period. If an entity early adopts the amendments in an interim period, any adjustments should be reflected as of the beginning of the fiscal year that includes that interim period. An entity should apply the amendments in this Update on a modified retrospective basis through a cumulative-effect adjustment directly to retained earnings as of the beginning of the period of adoption. Additionally, in the period of adoption, an entity should provide disclosures about a change in accounting principle. This Update is not expected to have a significant impact on the Company’s financial statements. In May 2017, the FASB issued ASU 2017-09, Compensation – Stock Compensation (Topic 718) This Update is not expected to have a significant impact on the Company’s financial statements. In July 2017, the FASB issued ASU 2017-11, Earnings Per Share (Topic 260), Distinguishing Liabilities from Equity (Topic 480), and Derivative and Hedging (Topic 815) Debt—Debt with Conversion and Other Options In January 2018, the FASB issued ASU 2018-01, Leases (Topic 842) In February 2018, the FASB issued ASU 2018-03, Technical Corrections and Improvements to Financial Instruments—Overall (Subtopic 825-10) Fair Value Measurement Derivatives and Hedging—Embedded Derivatives Financial Instruments—Overall Financial Services— Insurance In June 2018, the FASB issued ASU 2018-07, Compensation – Stock Compensation (Topic 718) In July 2018, the FASB issued ASU 2018-10, Codification Improvements to Topic 842, Leases In July 2018, the FASB issued ASU 2018-11, Leases (Topic 842): Targeted Improvements Leases Revenue from Contracts with Customers In August 2018, the FASB issued ASU 2018-13, Fair Value Measurement (Topic 820): Disclosure Framework – Changes the Disclosure Requirements for Fair Value Measurements In August 2018, the FASB issued ASU 2018-14, Compensation – Retirement Benefits (Topic 715-20).

Summary of Significant Accoun_3

Summary of Significant Accounting Policies (Tables)	12 Months Ended
	Sep. 30, 2018
Accounting Policies [Abstract]
Carrying Amount of Goodwill and Intangible Assets	The following tables provide information for the carrying amount of goodwill and intangible assets (in thousands). Goodwill 2018 2017 Balance at beginning of year $ 13,801 $ 13,801 Goodwill acquired - - Balance at end of year $ 13,801 $ 13,801 Intangible assets 2018 2017 Balance at beginning of year $ 1,844 $ 2,487 Intangible assets acquired - - Amortization (469 ) (643 ) Balance at end of year $ 1,375 $ 1,844
Amortizable Intangible Assets	Amortizable intangible assets were composed of the following: September 30, 2018 2017 Gross Amount Accumulated Amortization (dollars in thousands) Core deposit intangible $ 4,787 $ 3,412 $ 2,943 2018 2017 Aggregate amortization expense: As of the years ended September 30 $ 469 $ 643
Estimated Future Amortization Expense	Estimated future amortization expense (dollars in thousands): 2019 $ 309 2020 275 2021 272 2022 239 2023 190 2024 90 $ 1,375

Earnings per Share (Tables)

Earnings per Share (Tables)	12 Months Ended
	Sep. 30, 2018
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 years ended September 30, 2018 and 2017. 2018 2017 Weighted-average common shares outstanding 18,133,095 18,133,095 Average treasury stock shares (6,420,854 ) (6,606,116 ) Average unearned ESOP shares (837,342 ) (882,617 ) Average unearned nonvested shares (41,055 ) (42,629 ) Weighted-average common shares and common stock equivalents used to calculate basic earnings per share 10,833,844 10,601,733 Additional common stock equivalents (nonvested stock) used to calculate diluted earnings per share - - Additional common stock equivalents (stock options) used to calculate diluted earnings per share - 61,724 Weighted-average common shares and common stock equivalents used to calculate diluted earnings per share 10,833,844 10,663,457

Investment Securities (Tables)

Investment Securities (Tables)	12 Months Ended
	Sep. 30, 2018
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): 2018 Amortized Cost Gross Unrealized Gains Gross Unrealized Losses Fair Value Available for sale Fannie Mae $ 147,433 $ 17 $ (5,827 ) $ 141,623 Freddie Mac 99,587 2 (4,415 ) 95,174 Governmental National Mortgage Association securities 22,164 - (838 ) 21,326 Total mortgage-backed securities 269,184 19 (11,080 ) 258,123 Obligations of states and political subdivisions 42,090 251 (1,392 ) 40,949 U.S. government agency securities 5,678 2 (122 ) 5,558 Corporate obligations 48,559 116 (1,260 ) 47,415 Other debt securities 20,295 - (922 ) 19,373 Total debt securities 385,806 388 (14,776 ) 371,418 Equity securities - financial services 25 - (5 ) 20 Total $ 385,831 $ 388 $ (14,781 ) $ 371,438 2017 Amortized Cost Gross Unrealized Gains Gross Unrealized Losses Fair Value Available for sale Fannie Mae $ 119,333 $ 207 $ (1,203 ) $ 118,337 Freddie Mac 98,668 177 (808 ) 98,037 Governmental National Mortgage Association securities 17,609 43 (203 ) 17,449 Total mortgage-backed securities 235,610 427 (2,214 ) 233,823 Obligations of states and political subdivisions 64,382 1,522 (546 ) 65,358 U.S. government agency securities 18,615 61 (5 ) 18,671 Corporate obligations 49,025 335 (618 ) 48,742 Other debt securities 24,200 47 (414 ) 23,833 Total debt securities 391,832 2,392 (3,797 ) 390,427 Equity securities - financial services 25 - - 25 Total $ 391,857 $ 2,392 $ (3,797 ) $ 390,452
Schedule of Amortized Cost and Fair Value of Debt Securities by Contractual Maturity	The amortized cost and fair value of debt securities at September 30, 2018, 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 $ 512 $ 512 Due after one year through five years 36,589 36,031 Due after five years through ten years 99,373 95,654 Due after ten years 249,332 239,221 Total $ 385,806 $ 371,418
Schedule of Gross Unrealized Losses and Fair Value	The following tables show the Company’s gross unrealized losses and fair value, aggregated by investment category and length of time that the individual securities have been in a continuous unrealized loss position (dollars in thousands): 2018 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 100 $ 63,997 $ (1,442 ) $ 74,783 $ (4,385 ) $ 138,780 $ (5,827 ) Freddie Mac 74 28,902 (830 ) 65,812 (3,585 ) 94,714 (4,415 ) Governmental National Mortgage Association securities 19 9,776 (142 ) 11,550 (696 ) 21,326 (838 ) Obligations of states and political subdivisions 25 7,651 (105 ) 21,004 (1,287 ) 28,655 (1,392 ) U.S. government agency securities 3 5,177 (122 ) - - 5,177 (122 ) Corporate obligations 34 20,172 (363 ) 13,206 (897 ) 33,378 (1,260 ) Other debt securities 20 2,399 (38 ) 16,974 (884 ) 19,373 (922 ) Equity securities- financial services 1 20 (5 ) - - 20 (5 ) Total 276 $ 138,094 $ (3,047 ) $ 203,329 $ (11,734 ) $ 341,423 $ (14,781 ) 2017 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 55 $ 61,852 $ (558 ) $ 20,679 $ (645 ) $ 82,531 $ (1,203 ) Freddie Mac 39 38,913 (354 ) 16,427 (454 ) 55,340 (808 ) Governmental National Mortgage Association securities 11 6,669 (41 ) 6,903 (162 ) 13,572 (203 ) Obligations of states and political subdivisions 25 10,944 (59 ) 17,425 (487 ) 28,369 (546 ) U.S. government agency securities 3 8,995 (5 ) - - 8,995 (5 ) Corporate obligations 22 15,119 (104 ) 8,032 (514 ) 23,151 (618 ) Other debt securities 19 7,141 (104 ) 13,806 (310 ) 20,947 (414 ) Total 174 $ 149,633 $ (1,225 ) $ 83,272 $ (2,572 ) $ 232,905 $ (3,797 )

Loans Receivable (Tables)

Loans Receivable (Tables)	12 Months Ended
	Sep. 30, 2018
Receivables [Abstract]
Summary of Loans Receivable	Loans receivable consist of the following (in thousands): 2018 2017 Real estate loans: Residential $ 580,561 $ 586,708 Construction 3,920 3,097 Commercial 416,573 318,323 Commercial 49,479 44,129 Obligations of states and political subdivisions 73,362 58,079 Home equity loans and lines of credit 43,962 46,219 Auto loans 146,220 186,646 Other 2,682 2,845 1,316,759 1,246,046 Less allowance for loan losses 11,688 9,365 Net loans $ 1,305,071 $ 1,236,681
Changes in Accretable Yield for Purchased Credit-Impaired Loans	Changes in the accretable yield for purchased credit-impaired loans were as follows, since acquisition, for the periods ended September 30, 2018 and 2017 (in thousands): September 30, September 30, Balance at beginning of period $ 471 $ 478 Reclassification and other 681 215 Accretion (1,045 ) (222 ) Balance at end of period $ 107 $ 471
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): September 30, 2018 September 30, 2017 Acquired Loans with Evidence or Deterioration in Credit Quality (ASC 310-30) Acquired Loans with Specific Evidence or Deterioration in Credit Quality (ASC 310-30) Outstanding balance $ 2,497 $ 5,490 Carrying amount 1,802 4,388
Schedule of Loans Evaluated for Impairment	The following tables show the amount of loans in each category that was 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 September 30, 2018 Real estate loans: Residential $ 580,561 $ 5,317 $ - $ 575,244 Construction 3,920 - - 3,920 Commercial 416,573 5,892 1,801 408,880 Commercial 49,479 85 1 49,393 Obligations of states and political subdivisions 73,362 - - 73,362 Home equity loans and lines of credit 43,962 114 - 43,848 Auto Loans 146,220 445 - 145,775 Other 2,682 17 - 2,665 Total $ 1,316,759 $ 11,870 $ 1,802 $ 1,303,087 Total Loans Individually Evaluated for Loans Acquired with Deteriorated Credit Quality Collectively Evaluated for Impairment September 30, 2017 Real estate loans: Residential $ 586,708 $ 6,202 $ - $ 580,506 Construction 3,097 - - 3,097 Commercial 318,323 7,211 3,775 307,337 Commercial 44,129 1,385 283 42,461 Obligations of states and political subdivisions 58,079 - - 58,079 Home equity loans and lines of credit 46,219 176 330 45,713 Auto Loans 186,646 572 - 186,074 Other 2,845 30 - 2,815 Total $ 1,246,046 $ 15,576 $ 4,388 $ 1,226,082
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, if applicable, excluding purchased impaired credit loans. Also presented are 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). Recorded Investment Unpaid Principal Balance Associated Allowance Average Recorded Investment Interest Income Recognized September 30, 2018 With no specific allowance recorded: Real estate loans: Residential $ 4,449 $ 6,176 $ - $ 4,192 $ 27 Construction - - - - - Commercial 5,892 6,790 - 6,432 279 Commercial 85 349 - 750 58 Obligations of states and political subdivisions - - - - - Home equity loans and lines of credit 114 138 - 161 1 Auto loans 87 223 - 150 1 Other 17 25 - 27 - Subtotal 10,644 13,701 - 11,712 366 With an allowance recorded: Real estate loans: Residential 868 938 149 1,258 - Construction - - - - - Commercial - - - 13 - Commercial - - - - - Obligations of states and political subdivisions - - - - - Home equity loans and lines of credit - - - 13 - Auto loans 358 375 164 201 - Other - - - - - Subtotal 1,226 1,313 313 1,485 - Total: Real estate loans: Residential 5,317 7,114 149 5,450 27 Construction - - - - - Commercial 5,892 6,790 - 6,445 279 Commercial 85 349 - 750 58 Obligations of states and political subdivisions - - - - - Home equity loans and lines of credit 114 138 - 174 1 Auto loans 445 598 164 351 1 Other 17 25 - 27 - Total $ 11,870 $ 15,014 $ 313 $ 13,197 $ 366 Recorded Investment Unpaid Principal Balance Associated Allowance Average Recorded Investment Interest Income Recognized September 30, 2017 With no specific allowance recorded: Real estate loans: Residential $ 4,392 $ 5,730 $ - $ 5,373 $ 39 Construction - - - - - Commercial 7,191 9,396 - 8,816 297 Commercial 1,385 1,575 - 1,579 120 Obligations of states and political subdivisions - - - - - Home equity loans and lines of credit 176 258 - 231 - Auto loans 123 237 - 116 1 Other 30 36 - 8 - Subtotal 13,297 17,232 - 16,123 457 With an allowance recorded: Real estate loans: Residential 1,810 2,264 154 1,814 - Construction - - - - - Commercial 20 1,193 19 360 - Commercial - - - 30 - Obligations of states and political subdivisions - - - - - Home equity loans and lines of credit - - - 3 - Auto loans 449 468 172 263 7 Other - - - - - Subtotal 2,279 3,925 345 2,470 7 Total: Real estate loans: Residential 6,202 7,994 154 7,187 39 Construction - - - - - Commercial 7,211 10,589 19 9,176 297 Commercial 1,385 1,575 - 1,609 120 Obligations of states and political subdivisions - - - - - Home equity loans and lines of credit 176 258 - 234 - Auto loans 572 705 172 379 8 Other 30 36 - 8 - Total $ 15,576 $ 21,157 $ 345 $ 18,593 $ 464
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 within the internal risk rating system as of September 30, 2018 and 2017 (in thousands): Pass Special Mention Substandard Doubtful Total September 30, 2018 Commercial real estate loans $ 392,915 $ 8,960 $ 14,698 $ - $ 416,573 Commercial 48,137 8 1,334 - 49,479 Obligations of states and political subdivisions 73,362 - - - 73,362 Total $ 514,414 $ 8,968 $ 16,032 $ - $ 539,414 Pass Special Mention Substandard Doubtful Total September 30, 2017 Commercial real estate loans $ 300,554 $ 3,376 $ 14,393 $ - $ 318,323 Commercial 40,996 32 3,101 - 44,129 Obligations of states and political subdivisions 58,079 - - - 58,079 Total $ 399,629 $ 3,408 $ 17,494 $ - $ 420,531
Schedule of Performing or Nonperforming Loans	The following tables present the recorded investment in the loan classes based on payment activity as of September 30, 2018 and 2017 (in thousands): Performing Nonperforming Purchased Credit Impaired Total September 30, 2018 Real estate loans: Residential $ 575,244 $ 5,317 $ - $ 580,561 Construction 3,920 - - 3,920 Home equity loans and lines of credit 43,746 216 - 43,962 Auto Loans 145,633 587 - 146,220 Other 2,664 18 - 2,682 Total $ 771,207 $ 6,138 $ - $ 777,345 Performing Nonperforming Purchased Credit Impaired Total September 30, 2017 Real estate loans: Residential $ 580,116 $ 6,592 $ - $ 586,708 Construction 3,097 - - 3,097 Home equity loans and lines of credit 45,576 313 330 46,219 Auto Loans 185,910 736 - 186,646 Other 2,807 38 - 2,845 Total $ 817,506 $ 7,679 $ 330 $ 825,515
Classes of the Loan Portfolio Summarized by the Aging Categories	The following table presents the classes of the loan portfolio summarized by the aging categories of performing loans and nonaccrual loans as of September 30, 2018 and 2017 (in thousands): 31-60 Days 61-90 Days Greater than 90 Days Past Due and Total Purchased Credit Total Current Past Past Accruing Non­accrual Past Accruing Non­accrual Loans September 30, 2018 Real estate loans: Residential $ 572,236 $ 2,088 $ 920 $ - $ 5,317 $ 8,325 $ - $ - $ 580,561 Construction 3,920 - - - - - - - 3,920 Commercial 412,636 185 - - 1,951 2,136 255 1,546 416,573 Commercial 48,567 25 11 - 875 911 - 1 49,479 Obligations of states and political subdivisions 73,362 - - - - - - - 73,362 Home equity loans and lines of credit 43,716 30 - - 216 246 - - 43,962 Auto loans 144,140 1,473 20 - 587 2,080 - - 146,220 Other 2,647 17 - - 18 35 - - 2,682 Total $ 1,301,224 $ 3,818 $ 951 $ - $ 8,964 $ 13,733 $ 255 $ 1,547 $ 1,316,759 31-60 Days 61-90 Days Greater than 90 Days Past Due and Total Purchased Credit Total Current Past Past Accruing Non­accrual Past Accruing Non­accrual Loans September 30, 2017 Real estate loans: Residential $ 577,034 $ 2,661 $ 421 $ - $ 6,592 $ 9,674 $ - $ - $ 586,708 Construction 3,097 - - - - - - - 3,097 Commercial 312,098 172 - - 2,278 2,450 612 3,163 318,323 Commercial 43,298 18 - - 530 548 - 283 44,129 Obligations of states and political subdivisions 58,079 - - - - - - - 58,079 Home equity loans and lines of credit 45,460 101 15 - 313 429 - 330 46,219 Auto loans 185,247 631 32 - 736 1,399 - - 186,646 Other 2,789 14 4 - 38 56 - - 2,845 Total $ 1,227,102 $ 3,597 $ 472 $ - $ 10,487 $ 14,556 $ 612 $ 3,776 $ 1,246,046
Summary of Primary Segments of ALL	The following table summarizes the primary segments of the ALL, segregated into the amount required for loans individually evaluated for impairment and the amount required for loans collectively evaluated for impairment as of September 30, 2018 and 2017 (in thousands): Real Estate Loans Obligations of States and Political Home Loans and Lines of Residential Construction Commercial Commercial Subdivisions Credit Auto Other Unallocated Total ALL balance at September 30, 2016 $ 4,426 $ 13 $ 852 $ 882 $ 215 $ 455 $ 1,880 $ 25 $ 308 $ 9,056 Charge-offs (504 ) - (1,352 ) (31 ) - (18 ) (2,009 ) (9 ) - (3,923 ) Recoveries 22 - 27 1 - 8 815 9 - 882 Provision (66 ) 10 2,231 135 33 25 1,150 (4 ) (164 ) 3,350 ALL balance at September 30, 2017 $ 3,878 $ 23 $ 1,758 $ 987 $ 248 $ 470 $ 1,836 $ 21 $ 144 $ 9,365 ALL balance at September 30, 2017 $ 3,878 $ 23 $ 1,758 $ 987 $ 248 $ 470 $ 1,836 $ 21 $ 144 $ 9,365 Charge-offs (335 ) - (54 ) (151 ) - (68 ) (1,833 ) (21 ) - (2,462 ) Recoveries 12 - 49 10 - 54 655 5 - 785 Provision 50 12 1,705 616 75 (160 ) 1,201 18 483 4,000 ALL balance at September 30, 2018 $ 3,605 $ 35 $ 3,458 $ 1,462 $ 323 $ 296 $ 1,859 $ 23 $ 627 $ 11,688 Individually evaluated for impairment $ 149 $ - $ - $ - $ - $ - $ 164 $ - $ - $ 313 Collectively evaluated for impairment 3,456 35 3,458 1,462 323 296 1,695 23 627 11,375 ALL balance at September 30, 2018 $ 3,605 $ 35 $ 3,458 $ 1,462 $ 323 $ 296 $ 1,859 $ 23 $ 627 $ 11,688 Individually evaluated for impairment $ 154 $ - $ 19 $ - $ - $ - $ 172 $ - $ - $ 345 Collectively evaluated for impairment 3,724 23 1,739 987 248 470 1,664 21 144 9,020 ALL balance at September 30, 2017 $ 3,878 $ 23 $ 1,758 $ 987 $ 248 $ 470 $ 1,836 $ 21 $ 144 $ 9,365
Summary of Troubled Debt Restructurings Granted	The following is a summary of troubled debt restructurings granted during the periods indicated (dollars in thousands). For the Year Ended September 30, 2018 Number of Contracts Pre-Modification Outstanding Recorded Investment Post-Modification Outstanding Recorded Investment Troubled debt restructurings Real estate loans: Residential 3 $ 446 $ 446 Construction - - - Commercial 2 123 123 Commercial - - - Obligations of states and political subdivisions - - - Home equity loans and lines of credit - - - Auto loans 4 35 35 Other - - - Total 9 $ 604 $ 604 For the Year Ended September 30, 2017 Number of Contracts Pre-Modification Outstanding Recorded Investment Post-Modification Outstanding Recorded Investment Troubled debt restructurings Real estate loans: Residential 6 $ 1,154 $ 1,167 Construction - - - Commercial 2 1,208 1,163 Commercial - - - Obligations of states and political subdivisions - - - Home equity loans and lines of credit - - - Auto loans 2 37 37 Other 1 22 22 Total 11 $ 2,421 $ 2,389

Premises and Equipment (Tables)

Premises and Equipment (Tables)	12 Months Ended
	Sep. 30, 2018
Property Plant And Equipment [Abstract]
Composition of Premises and Equipment	Premises and equipment consist of the following (in thousands): 2018 2017 Land and land improvements $ 6,044 $ 6,269 Buildings and leasehold improvements 16,207 17,047 Furniture, fixtures, and equipment 11,687 11,412 Construction in process - 30 33,938 34,758 Less accumulated depreciation (19,337 ) (18,524 ) Total $ 14,601 $ 16,234

Deposits (Tables)

Deposits (Tables)	12 Months Ended
	Sep. 30, 2018
Banking And Thrift [Abstract]
Schedule of Deposits and Respective Weighted-Average Interest Rates by Major Classifications	Deposits and their respective weighted-average interest rates consist of the following major classifications (dollars in thousands): 2018 2017 Weighted- Average Interest Rate Amount Weighted- Average Interest Rate Amount Noninterest-bearing demand accounts - % $ 158,340 - % $ 160,125 Interest bearing demand accounts 0.39 221,327 0.24 208,369 Money market accounts 0.89 296,078 0.51 253,949 Savings and club accounts 0.05 135,862 0.05 141,521 Certificates of deposit 1.76 525,248 1.39 510,897 Total 0.96 % $ 1,336,855 0.70 % $ 1,274,861 2018 2017 Weighted- Average Interest Rate Amount Weighted- Average Interest Rate Amount Certificates of deposit: 0.00 - 2.00% 1.58 % $ 395,583 1.30 % $ 460,132 2.01 - 4.00% 2.29 129,665 2.19 50,765 Total 1.76 % $ 525,248 1.39 % $ 510,897
Scheduled Maturities of Certificates of Deposit	At September 30, 2018 scheduled maturities of certificates of deposit are as follows (in thousands): 2019 $ 379,865 2020 93,820 2021 17,914 2022 26,583 2023 7,066 Total $ 525,248
Scheduled Maturities of Certificates of Deposit in Denominations	The scheduled maturities of certificates of deposit in denominations of $250,000 or more as of September 30, 2018, are as follows (in thousands): Within three months $ 13,294 Three through six months 7,131 Six through twelve months 32,276 Over twelve months 13,578 Total $ 66,279

Short-Term Borrowings (Tables)

Short-Term Borrowings (Tables)	12 Months Ended
	Sep. 30, 2018
Debt Disclosure [Abstract]
Schedule of Short-Term Borrowings	The following table sets forth information concerning short-term borrowings (in thousands): 2018 2017 Balance at year-end $ 179,773 $ 137,466 Maximum amount outstanding at any month-end 260,797 185,201 Average balance outstanding during the year 210,050 147,765 Weighted-average interest rate: As of year-end 2.31 % 1.36 % Paid during the year 1.86 % 0.98 %

Other Borrowings (Tables)

Other Borrowings (Tables)	12 Months Ended
	Sep. 30, 2018
Debt Disclosure [Abstract]
Contractual Maturities of FHLB Long-Term Advances	The following table presents contractual maturities of FHLB long-term advances (in thousands): Maturity Range Weighted- Average Stated Interest Rate Ranged Description From To Interest Rate From To 2018 2017 Convertible — — — — — $ — $ 5,000 Fixed rate 10/22/2018 10/27/2020 1.77 1.33 2.85 43,896 75,601 Mid-term 10/18/2018 6/01/2021 1.90 1.02 2.57 74,827 93,567 Total $ 118,723 $ 174,168
Maturities of FHLB Long-Term Advances	Maturities of FHLB long-term advances are summarized as follows (in thousands): Year Ending September 30, Amount Weighted- Average Rate 2019 $ 75,247 1.71 % 2020 30,846 2.02 2021 12,630 2.30 Total $ 118,723 1.85 %

Income Taxes (Tables)

Income Taxes (Tables)	12 Months Ended
	Sep. 30, 2018
Income Tax Disclosure [Abstract]
Schedule of Provision for Income Taxes	The provision for income taxes consists of (in thousands): 2018 2017 Current: Federal $ 1,086 $ 837 State 6 — Total current taxes 1,092 837 Deferred income tax benefit 890 754 Change in corporate tax rate 3,682 — Total income tax provision $ 5,664 $ 1,591
Schedule of Changes in Significant Portions of the Deferred Tax Assets and Deferred Tax Liabilities	The tax effects of deductible and taxable temporary differences that gave rise to significant portions of the deferred tax assets and deferred tax liabilities are as follows (in thousands): 2018 2017 Deferred tax assets: Allowance for loan losses $ 2,455 $ 3,184 Adjustment to record funded status of pension plan 127 324 Investment losses subject to Section 382 limitation 2,510 4,562 Purchase accounting adjustment 4 341 Net unrealized loss on securities 3,022 478 Deferred compensation 290 631 Other real estate owned 152 273 Nonaccrual interest 163 223 Employee stock ownership plan 491 750 Alternative minimum tax 604 577 Other 1,304 2,058 Total gross deferred tax assets 11,122 13,401 Deferred tax liabilities: Pension plan 675 924 Mortgage servicing rights 44 80 Premises and equipment 45 12 Net unrealized gain on derivatives 515 413 Low income housing tax credits 684 978 Other 718 572 Total gross deferred tax liabilities 2,681 2,979 Net deferred tax assets $ 8,441 $ 10,422
Schedule of Reconciliation of the Federal Statutory Rate and the Effective Income Tax Rate	The reconciliation of the federal statutory rate and the Company’s effective income tax rate is as follows (dollars in thousands): 2018 2017 Amount % of Pretax Income Amount % of Pretax Income Provision at statutory rate $ 2,961 24.3 % $ 3,036 34.0 % Income from bank-owned life insurance (243 ) (2.0 ) (351 ) (3.9 ) Tax-exempt income (421 ) (3.5 ) (843 ) (9.5 ) Low-income housing credits (167 ) (1.4 ) (197 ) (2.2 ) Tax rate change 3,682 30.2 — — Other, net (148 ) (1.2 ) (54 ) (0.6 ) Actual tax expense and effective rate $ 5,664 46.4 % $ 1,591 17.8 %

Commitments and Contingent Li_2

Commitments and Contingent Liabilities (Tables)	12 Months Ended
	Sep. 30, 2018
Commitments And Contingencies Disclosure [Abstract]
Components of Off Balance Sheet Commitments	The off-balance sheet commitments consist of the following (in thousands): 2018 2017 Commitments to extend credit $ 112,037 $ 67,265 Standby letters of credit 5,329 2,810 Unfunded lines of credit 96,618 77,390

Lease Commitments and Total R_2

Lease Commitments and Total Rental Expense (Tables)	12 Months Ended
	Sep. 30, 2018
Commitments And Contingencies Disclosure [Abstract]
Future Minimum Lease Payments By Year and in the Aggregate	Future minimum lease payments by year and in the aggregate, under noncancellable operating leases with initial or remaining terms of one year or more, consisted of the following at September 30, 2018 (in thousands): 2019 $ 859 2020 782 2021 596 2022 453 2023 386 2024 and beyond 925 Total $ 4,001

Employee Benefits (Tables)

Employee Benefits (Tables)	12 Months Ended
	Sep. 30, 2018
Postemployment Benefits [Abstract]
Components of the ESOP Shares	The following table presents the components of the ESOP shares: 2018 2017 Allocated shares 345,455 359,711 Shares committed to be released 33,962 33,962 Unreleased shares 826,403 871,686 Total ESOP shares 1,205,820 1,265,359 Fair value of unreleased shares (in thousands) $ 13,437 $ 13,685
Schedule of Stock Option Activity	The following is a summary of the Company’s stock option activity and related information for its option plan for the year ended September 30, 2018. Number of Stock Options Weighted- Average Exercise Price Weighted- Average Remaining Contractual Term (in years) Aggregate Intrinsic Value (in thousands) Outstanding, September 30, 2017 294,646 $ 12.35 0.67 $ 987 Granted — — — — Exercised 294,646 12.35 — — Forfeited — — — — Outstanding, September 30, 2018 — — — — Exercisable at year-end — — — —
Schedule of Nonvested Restricted Stock Option Activity	The following is a summary of the status of the Company’s nonvested restricted stock as of September 30, 2018, and changes therein during the year then ended: Number of Restricted Weighted- Average Grant Date Fair Value Nonvested at September 30, 2017 34,692 $ 14.89 Granted 27,528 15.37 Vested (20,814 ) 14.58 Forfeited (6,334 ) 15.32 Nonvested at September 30, 2018 35,072 $ 15.37
Summary of Change in Plan Assets and Benefit Obligation	The following table sets forth the change in plan assets and benefit obligation at September 30 (in thousands): 2018 2017 Change in benefit projected obligation: Projected benefit obligation at beginning of year $ 18,598 $ 25,470 Service cost - 516 Interest cost 698 859 Actuarial (gains) losses (204 ) (2,857 ) Curtailment (Plan Freeze) - (4,579 ) Benefits paid (1,981 ) (811 ) Projected benefit obligation at end of year 17,111 18,598 Change in plan assets: Fair value of plan assets at beginning of year 20,363 19,188 Actual return on plan assets 1,338 1,986 Contributions - - Benefits paid (1,981 ) (811 ) Fair value of plan assets at end of year 19,720 20,363 Funded status $ 2,609 $ 1,765
Summary of the Components of Net Periodic Pension Cost	Amounts not yet recognized as a component of net periodic pension cost (in thousands): 2018 2017 Amounts recognized in accumulated other comprehensive loss consist of: Net loss $ 604 $ 953
Summary of the Components of Net Periodic Benefit Cost	The following table comprises the components of net periodic benefit cost for the years ended September 30 (in thousands): 2018 2017 Service cost $ - $ 516 Interest cost 698 859 Expected return on plan assets (1,193 ) (1,385 ) Amortization of unrecognized loss - 226 Net periodic (benefit) cost $ (495 ) $ 216
Schedule of Weighted-Average Assumptions	Weighted-average assumptions used to determine benefit obligations: 2018 2017 Discount rate 4.10 % 3.85 % Rate of compensation increase N/A N/A
Schedule of Assumptions Used to Determine Net Periodic Benefit Cost	Weighted-average assumptions used to determine net periodic benefit cost for the years ended: 2018 2017 Discount rate 3.85 % 4.10 % Expected long-term return on plan assets 6.00 % 7.00 Rate of compensation increase N/A N/A
Summary of the Plan's Financial Assets at Fair Value, within the Fair Value Hierarchy	The following tables set forth by level, within the fair value hierarchy, the plan’s financial assets at fair value as of September 30, 2018 and 2017 (in thousands): September 30, 2018 Level I Level II Level III Total Assets: Investment in collective trusts Fixed income $ - $ 7,916 $ - $ 7,916 Equity - 11,789 - 11,789 Investment in short-term investments - 15 - 15 Total assets at fair value $ - $ 19,720 $ - $ 19,720 September 30, 2017 Level I Level II Level III Total Assets: Investment in collective trusts Fixed income $ - $ 7,999 $ - $ 7,999 Equity - 12,353 - 12,353 Investment in short-term investments - 11 - 11 Total assets at fair value $ - $ 20,363 $ - $ 20,363
The Bank's Defined Benefit Pension Plan Weighted-Average Asset Allocations	The Bank’s defined benefit pension plan weighted-average asset allocations at September 30, 2018 and 2017 by asset category, are as follows: September 30, Asset Category 2018 2017 Fixed income securities 40.1 % 39.3 % Equity securities 59.8 60.7 Other 0.1 0.0 Total 100.0 % 100.0 %
Summary of Estimated Future Benefit Payments	Estimated future benefit payments, which reflect expected future service, as appropriate, are as follows (in thousands): 2019 $ 366 2020 3,106 2021 2,345 2022 659 2023 852 2024-2028 6,495

Regulatory Capital Requiremen_2

Regulatory Capital Requirements (Tables)	12 Months Ended
	Sep. 30, 2018
Banking And Thrift [Abstract]
The Bank's Actual Capital Ratios	The Bank’s actual capital ratios are presented in the following table (dollars in thousands): 2018 2017 Amount Ratio Amount Ratio Total capital (to risk-weighted assets) Actual $ 180,203 13.6 % $ 170,325 14.0 % For capital adequacy purposes 105,926 8.0 97,458 8.0 To be well capitalized 132,407 10.0 121,822 10.0 Tier 1 capital (to risk-weighted assets) Actual $ 168,161 12.7 % $ 160,605 13.2 % For capital adequacy purposes 79,444 6.0 73,093 6.0 To be well capitalized 105,926 8.0 97,458 8.0 Common equity tier 1 capital (to risk-weighted assets) Actual $ 168,161 12.7 % $ 160,605 13.2 % For capital adequacy purposes 59,583 4.5 54,820 4.5 To be well capitalized 86,065 6.5 79,184 6.5 Tier 1 capital (to adjusted assets) Actual $ 168,161 9.2 % $ 160,605 9.2 % For capital adequacy purposes 72,456 4.0 69,878 4.0 To be well capitalized 90,570 5.0 87,247 5.0

Fair Value Measurements (Tables

Fair Value Measurements (Tables)	12 Months Ended
	Sep. 30, 2018
Fair Value Disclosures [Abstract]
Schedule of Securities, Real Estate Owned and Impaired Loans Measured at Fair Value	The following tables present information about the Company’s securities, real estate owned, and impaired loans measured at fair value as of September 30, 2018 and 2017, and indicates the fair value hierarchy of the valuation techniques utilized by the Company to determine such fair value (in thousands): September 30, 2018 Level I Level II Level III Total Assets measured at fair value on a recurring basis: Investment securities available for sale: Mortgage-backed securities $ - $ 258,123 $ - $ 258,123 Obligations of states and political subdivisions - 40,949 - 40,949 U.S. government agency securities - 5,558 - 5,558 Corporate obligations - 39,677 7,738 47,415 Other debt securities - 19,373 - 19,373 Equity securities - financial services 20 - - 20 Total securities 20 363,680 7,738 371,438 Derivatives and hedging activities - 2,452 - 2,452 Assets measured at fair value on a nonrecurring basis: Foreclosed real estate owned - - 1,141 1,141 Impaired loans - - 11,557 11,557 September 30, 2017 Level I Level II Level III Total Assets measured at fair value on a recurring basis: Investment securities available for sale: Mortgage-backed securities $ - $ 233,823 $ - $ 233,823 Obligations of states and political subdivisions - 65,358 - 65,358 U.S. government agency securities - 18,671 - 18,671 Corporate obligations - 41,518 7,224 48,742 Other debt securities - 23,833 - 23,833 Equity securities - financial services 25 - - 25 Total securities 25 383,203 7,224 390,452 Derivatives and hedging activities - 1,215 - 1,215 Assets measured at fair value on a nonrecurring basis: Foreclosed real estate owned - - 1,424 1,424 Impaired loans - - 15,231 15,231
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 years ended September 30, 2018 and 2017 (in thousands). Fair Value Measurement Using Significant Unobservable Inputs (Level III) September 30, 2018 September 30, 2017 Beginning balance $ 7,224 $ 7,485 Purchases, sales, issuances, settlements, net 500 - Total unrealized gain: Included in earnings - - Included in other comprehensive income 14 4 Transfers into Level III - 750 Transfers out of Level III - (1,015 ) $ 7,738 $ 7,224
Summary of Additional Quantitative Information about Assets Measured at Fair Value on a Nonrecurring Basis	The following table presents additional quantitative information about assets measured at fair value on a nonrecurring basis and for which the Company has utilized Level III inputs to determine fair value (dollars in thousands): Quantitative Information About Level III Fair Value Measurements Fair Value Estimate Valuation Techniques Unobservable Input Range (Weighted September 30, 2018 Impaired loans $ 11,557 Appraisal of collateral (1) Appraisal adjustments (2) 0% to 35% (25.3%) Foreclosed real estate owned 1,141 Appraisal of collateral (1) Appraisal adjustments (2) 20% to 46% (23.7%) September 30, 2017 Impaired loans $ 15,231 Appraisal of collateral (1) Appraisal adjustments (2) 0% to 57% (24.0%) Foreclosed real estate owned 1,424 Appraisal of collateral (1) Appraisal adjustments (2) 20% to 46% (22.1%) (1) Fair value is generally determined through independent appraisals of the underlying collateral, which generally include various Level III 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 is presented as a percent of the appraisal.

Fair Value of Financial Instr_2

Fair Value of Financial Instruments (Tables)	12 Months Ended
	Sep. 30, 2018
Fair Value Disclosures [Abstract]
Schedule of Fair Values of the Company's Financial Instruments	The fair values of the Company’s financial instruments are as follows (in thousands): September 30, 2018 Carrying Value Level I Level II Level III Total Fair Value Financial assets: Cash and cash equivalents $ 43,539 $ 43,539 $ - $ - $ 43,539 Certificates of deposit 500 - - 505 505 Investment and mortgage-backed securities available for sale 371,438 20 363,680 7,738 371,438 Loans receivable, net 1,305,071 - - 1,269,127 1,269,127 Accrued interest receivable 6,640 6,640 - - 6,640 Regulatory stock 12,973 12,973 - - 12,973 Mortgage servicing rights 206 - - 340 340 Derivatives 2,452 - 2,452 - 2,452 Bank-owned life insurance 38,630 38,630 - - 38,630 Financial liabilities: Deposits $ 1,336,855 $ 811,607 $ - $ 520,861 $ 1,332,468 Short-term borrowings 179,773 179,773 - - 179,773 Other borrowings 118,723 - - 117,920 117,920 Advances by borrowers for taxes and insurance 6,826 6,826 - - 6,826 Accrued interest payable 1,369 1,369 - - 1,369 September 30, 2017 Carrying Value Level I Level II Level III Total Fair Value Financial assets: Cash and cash equivalents $ 41,683 $ 41,683 $ - $ - $ 41,683 Certificates of deposit 500 - - 505 505 Investment and mortgage-backed securities available for sale 390,452 25 383,203 7,224 390,452 Loans receivable, net 1,236,681 - - 1,235,368 1,235,368 Accrued interest receivable 6,149 6,149 - - 6,149 Regulatory stock 13,832 13,832 - - 13,832 Mortgage servicing rights 232 - - 310 310 Derivatives 1,215 - 1,215 - 1,215 Bank-owned life insurance 37,626 37,626 - - 37,626 Financial liabilities: Deposits $ 1,274,861 $ 763,964 $ - $ 511,392 $ 1,275,356 Short-term borrowings 137,446 137,446 - - 137,446 Other borrowings 174,168 - - 174,107 174,107 Advances by borrowers for taxes and insurance 5,163 5,163 - - 5,163 Accrued interest payable 1,043 1,043 - - 1,043

Accumulated Other Comprehensi_2

Accumulated Other Comprehensive Income (Loss) (Tables)	12 Months Ended
	Sep. 30, 2018
Equity [Abstract]
Summary of Activity in Accumulated Other Comprehensive Income (Loss)	The activity in accumulated other comprehensive income (loss) for the years ended September 30, 2018 and 2017, is as follows (in thousands): Accumulated Other Comprehensive Income (Loss) (1) Defined Benefit Pension Plan Unrealized Gains (Losses) on Securities Available for Sale Derivatives Total Balance at September 30, 2017 $ (628 ) $ (927 ) $ 801 $ (754 ) Other comprehensive income (loss) before reclassifications 275 (9,883 ) 1,269 (8,339 ) Amounts reclassified from accumulated other comprehensive loss - (123 ) (348 ) (471 ) Period change 275 (10,006 ) 921 (8,810 ) Reclassification of certain income tax effects from other comprehensive (loss) income (124 ) (436 ) 214 (346 ) Balance at September 30, 2018 $ (477 ) $ (11,369 ) $ 1,936 $ (9,910 ) Balance at September 30, 2016 $ (6,083 ) $ 3,952 $ 299 $ (1,832 ) Other comprehensive income (loss) before reclassifications and pension plan curtailment 2,284 (4,684 ) 505 (1,895 ) Pension plan curtailment 3,022 - - 3,022 Amounts reclassified from accumulated other comprehensive income (loss) 149 (195 ) (3 ) (49 ) Period change 5,455 (4,879 ) 502 1,078 Balance at September 30, 2017 $ (628 ) $ (927 ) $ 801 $ (754 ) (1) All amounts are net of tax. Related income tax expense or benefit is calculated using an income tax rate approximating 24.3 % in Fiscal 2018 and 34.0% in Fiscal 2017.
Summary of Reclassification Out of Accumulated Other Comprehensive Income (Loss)	Details About Accumulated Other Comprehensive Loss Components Amount Reclassified from Accumulated Other Comprehensive Loss For the Year Ended September 30, (4) Affected Line Item in the Consolidated (in thousands) 2018 2017 Statement of Income Securities available for sale (1) Net securities gains reclassified into earnings $ 162 $ 295 Gain on sale of investments, net Related income tax expense (39 ) (100 ) Income taxes Net effect on accumulated other comprehensive loss for the period 123 195 Defined benefit pension plan (2) Amortization of net (loss) gain and prior service costs - (226 ) Compensation and employee benefits Related income tax expense - 77 Income taxes Net effect on accumulated other comprehensive loss for the period - (149 ) Derivatives and Hedging Activities (3) Interest expense, effective portion 459 5 Interest expense Related income tax expense (111 ) (2 ) Income taxes Net effect on accumulated other comprehensive loss for the period 348 3 Total reclassifications for the period $ 471 $ 49 (1) For additional details related to unrealized gains on securities and related amounts reclassified from accumulated other comprehensive income (loss) see Note 3, “Investment Securities.” (2) Included in the computation of net periodic pension cost. See Note 12, “Employee Benefits” for additional detail. (3) For additional details related to derivative financial instruments see Note18, “Derivatives and Hedging Activities.” (4) Amounts in parenthesis indicate debits.

Derivatives and Hedging Activit

Derivatives and Hedging Activities (Tables)	12 Months Ended
	Sep. 30, 2018
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 September 30, 2018 and 2017, (in thousands). Fair Values of Derivative Instruments Asset Derivatives As of September 30, 2018 As of September 30, 2017 Notional Amount Balance Sheet Location Fair Value Notional Amount Balance Sheet Location Fair Value Derivatives designated as hedging instruments Interest Rate Products $ 100,000 Other Assets $ 2,595 $ 75,000 Other Assets $ 1,215
Schedule of Effect of Fair Value and Cash Flow Hedge Accounting on Accumulated Other Comprehensive Income	The table below presents the effect of the Company’s cash flow hedge accounting on Accumulated Other Comprehensive Income for the periods ended September 30, 2018 and 2017 (in thousands). The Effect of Fair Value and Cash Flow Hedge Accounting on Accumulated Other Comprehensive Income Derivatives in Hedging Relationships Amount of Gain Recognized in OCI on Derivative Amount of Gain Reclassified from Accumulated OCI into Income Year Ended September 30, Year Ended September 30, Location of Gain Reclassified from Year Ended September 30, Year Ended September 30, 2018 2017 Accumulated OCI into Income 2018 2017 Derivatives in Cash Flow Hedging Relationships Interest Rate Products $ 1,696 $ 930 Interest Expense $ 459 $ 13 Total $ 1,696 $ 930 $ 459 $ 13 The table below presents the effect of the Company’s derivative financial instruments on the Income Statement for the year to date periods ended September 30, 2018 and 2017. Location and Amount of Gain Recognized in Income on Fair Value and Cash Flow Hedging Relationships Year Ended September 30, 2018 Year Ended September 30, 2017 Interest Income (Expense) Other Income (Expense) Interest Income (Expense) Other Income (Expense) Total amounts of income and expense line items presented in the statement of financial performance in which the effects of fair value or cash flow hedges are recorded $ 459 $ - $ 13 $ - The effects of fair value and cash flow hedging: Gain in cash flow hedging relationships Interest contracts Amount of gain reclassified from accumulated other comprehensive income into income $ 459 $ - $ 13 $ -
Schedule of Gross Presentation, Effects of Offsetting and Net Presentation of Derivatives	The table below presents a gross presentation, the effects of offsetting, and a net presentation of the Company’s derivatives for the periods ended September 30, 2018 and 2017. The net amounts of derivative assets or liabilities can be reconciled on the tabular disclosure of fair value. The tabular disclosure of fair value provides the location the derivative assets and liabilities are presented on the Balance Sheet. There were no derivative liabilities for the periods ended September 20, 2018 and 2017. Offsetting of Derivative Assets as of September 30, 2018 Gross Amounts Not Offset in the Statement of Financial Position Gross Amounts of Recognized Assets Gross Amounts Offset in the Statement of Financial Position Net Amounts of Assets presented in the Statement of Financial Position Financial Instruments Cash Collateral Received Net Amount Derivatives $ 2,595 $ - $ 2,595 $ - $ 2,540 $ 55 Offsetting of Derivative Assets as of September 30, 2017 Gross Amounts Not Offset in the Statement of Financial Position Gross Amounts of Recognized Assets Gross Amounts Offset in the Statement of Financial Position Net Amounts of Assets presented in the Statement of Financial Position Financial Instruments Cash Collateral Received Net Amount Derivatives $ 1,240 $ - $ 1,240 $ - $ 970 $ 270

Parent Company (Tables)

Parent Company (Tables)	12 Months Ended
	Sep. 30, 2018
Condensed Financial Information Of Parent Company Only Disclosure [Abstract]
Condensed Balance Sheet	Condensed financial statements of ESSA Bancorp, Inc. are as follows (in thousands): CONDENSED BALANCE SHEET September 30, 2018 2017 ASSETS Cash and due from banks $ 3,713 $ 5,034 Investment securities available for sale 20 25 Investment in subsidiary 173,431 175,127 Premises and equipment, net 431 1,093 Other assets 1,705 1,577 TOTAL ASSETS $ 179,300 $ 182,856 LIABILITIES AND STOCKHOLDERS’ EQUITY Other liabilities $ 114 $ 129 Stockholders’ equity 179,186 182,727 TOTAL LIABILITIES AND STOCKHOLDERS’ EQUITY $ 179,300 $ 182,856
Condensed Statement of Income	CONDENSED STATEMENT OF INCOME Year Ended September 30, 2018 2017 INCOME Interest income $ 517 $ 426 Total income 517 426 EXPENSES Professional fees 431 455 Other 388 51 Total expenses 819 506 Loss before income tax expense (302 ) (80 ) Income tax benefit (73 ) (27 ) Loss before equity in undistributed net earnings of subsidiary (229 ) (53 ) Equity in undistributed net earnings of subsidiary 6,760 7,392 NET INCOME $ 6,531 $ 7,339 COMPREHENSIVE (LOSS)INCOME $ (2,279 ) $ 8,417
Condensed Statement of Cash Flows	CONDENSED STATEMENT OF CASH FLOWS Year Ended September 30, 2018 2017 OPERATING ACTIVITIES Net income $ 6,531 $ 7,339 Adjustments to reconcile net income to net cash provided by operating activities: Equity in undistributed net earnings of subsidiary (6,760 ) (7,391 ) Provision for depreciation 23 25 (Increase) decrease in accrued income taxes 73 (34 ) (Increase) decrease in accrued interest receivable (56 ) 1 Deferred federal income taxes 2 (5 ) Loss on disposal of fixed assets 340 - Other, net 564 974 Net cash provided by operating activities 717 909 INVESTING ACTIVITIES Sale of premises, equipment and software 299 - Net cash used for investing activities 299 - FINANCING ACTIVITIES Proceeds from the exercise of stock options 1,575 779 Dividends on common stock (3,912 ) (3,830 ) Net cash used for financing activities (2,337 ) (3,051 ) Decrease in cash (1,321 ) (2,142 ) CASH AT BEGINNING OF YEAR 5,034 7,176 CASH AT END OF YEAR $ 3,713 $ 5,034

Selected Quarterly Data (Unau_2

Selected Quarterly Data (Unaudited) (Tables)	12 Months Ended
	Sep. 30, 2018
Quarterly Financial Information Disclosure [Abstract]
Summary of Selected Quarterly Data	Three Months Ended December 31, 2017 March 31, 2018 June 30, 2018 September 30, 2018 Total interest income $ 15,376 $ 15,847 $ 16,718 $ 16,562 Total interest expense 3,608 3,912 4,156 4,592 Net interest income 11,768 11,935 12,562 11,970 Provision for loan losses 1,000 1,100 975 925 Net interest income after provision for loan losses 10,768 10,835 11,587 11,045 Total noninterest income 1,969 1,945 1,897 2,002 Total noninterest expense 10,282 9,988 10,163 9,420 Income before income taxes 2,455 2,792 3,321 3,627 Income taxes expense 4,093 529 500 542 Net income $ (1,638 ) $ 2,263 $ 2,821 $ 3,085 Per share data: Net income Basic $ (0.15 ) $ 0.21 $ 0.26 $ 0.28 Diluted $ (0.15 ) $ 0.21 $ 0.26 $ 0.28 Average shares outstanding Basic 10,717,138 10,796,353 10,911,469 10,970,947 Diluted 10,717,138 10,822,109 10,922,860 10,970,947 Three Months Ended December 31, 2016 March 31, 2017 June 30, 2017 September 30, 2017 Total interest income $ 14,650 $ 14,379 $ 14,408 $ 14,881 Total interest expense 3,018 3,075 3,248 3,458 Net interest income 11,632 11,304 11,160 11,423 Provision for loan losses 750 750 750 1,100 Net interest income after provision for loan losses 10,882 10,554 10,410 10,323 Total noninterest income 1,857 1,784 2,120 2,438 Total noninterest expense 10,402 10,504 10,320 10,212 Income before income taxes 2,337 1,834 2,210 2,549 Income taxes benefit 400 203 448 540 Net income $ 1,937 $ 1,631 $ 1,762 $ 2,009 Per share data: Net income Basic $ 0.18 $ 0.15 $ 0.16 $ 0.19 Diluted $ 0.18 $ 0.15 $ 0.16 $ 0.19 Average shares outstanding Basic 10,475,032 10,592,997 10,678,856 10,704,554 Diluted 10,604,072 10,691,960 10,743,008 10,766,159

Summary of Significant Accoun_4

Summary of Significant Accounting Policies - Additional Information (Detail) - USD ($)	12 Months Ended
	Sep. 30, 2018	Sep. 30, 2017
Summary Of Significant Accounting Policies [Line Items]
Days past due over which loans are considered as substandard	90 days
Total servicing assets included in other assets	$ 206,000	$ 232,000
Goodwill and Intangible Assets Impairment	$ 0	$ 0
Threshold percentage minimum for recognition upon settlement	Greater than 50%
ASU 2018-02 [Member] | New Accounting Pronouncement, Early Adoption, Effect [Member]
Summary Of Significant Accounting Policies [Line Items]
Reclassification between accumulated other comprehensive loss and retained earnings	$ 346,000
Minimum [Member]
Summary Of Significant Accounting Policies [Line Items]
Depreciation range for buildings, land improvements, and leasehold improvements	10 years
Depreciation range for furniture, fixtures, and equipment	3 years
Maximum [Member]
Summary Of Significant Accounting Policies [Line Items]
Depreciation range for buildings, land improvements, and leasehold improvements	40 years
Depreciation range for furniture, fixtures, and equipment	7 years
Cash equivalents interest bearing deposits with original maturities	90 days
Maximum [Member] | ASU 2016-02, Leases [Member]
Summary Of Significant Accounting Policies [Line Items]
Estimated percentage increase in assets from recognition of leases	1.00%
Estimated percentage increase in liabilities from recognition of leases	1.00%
Troubled Debt Restructuring [Member]
Summary Of Significant Accounting Policies [Line Items]
Days past due over which loans are considered as substandard	180 days
Federal Home Loan Bank System [Member]
Summary Of Significant Accounting Policies [Line Items]
Loan receivables contractual period for interest and principal accrual	90 days
Percentage Investment in capital stock	0.10%
Investment on outstanding Borrowings, percentage	4.00%
Stock bought and sold based upon par value	$ 100
ESSA Advisory Services, LLC [Member]
Summary Of Significant Accounting Policies [Line Items]
Percentage ownership of wholly owned subsidiary	100.00%

Summary of Significant Accoun_5

Summary of Significant Accounting Policies - Carrying Amount of Goodwill and Intangible Assets (Detail) - USD ($) $ in Thousands	12 Months Ended
	Sep. 30, 2018	Sep. 30, 2017
Goodwill
Balance at beginning of year	$ 13,801	$ 13,801
Balance at end of year	13,801	13,801
Intangible assets
Balance at beginning of year	1,844	2,487
Amortization	(469)	(643)
Balance at end of year	$ 1,375	$ 1,844

Summary of Significant Accoun_6

Summary of Significant Accounting Policies - Amortizable Intangible Assets (Detail) - USD ($) $ in Thousands	12 Months Ended
	Sep. 30, 2018	Sep. 30, 2017
Finite-Lived Intangible Assets [Line Items]
Amortization of intangible assets	$ 469	$ 643
Core Deposit Intangible [Member]
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	4,787
Accumulated Amortization	$ 3,412	$ 2,943

Summary of Significant Accoun_7

Summary of Significant Accounting Policies - Estimated Future Amortization Expense (Detail) $ in Thousands	Sep. 30, 2018USD ($)
Accounting Policies [Abstract]
2,019	$ 309
2,020	275
2,021	272
2,022	239
2,023	190
2,024	90
Total estimated future amortization of expense	$ 1,375

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								12 Months Ended
	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2017	Sep. 30, 2017	Jun. 30, 2017	Mar. 31, 2017	Dec. 31, 2016	Sep. 30, 2018	Sep. 30, 2017
Earnings Per Share [Abstract]
Weighted-average common shares outstanding									18,133,095	18,133,095
Average treasury stock shares									(6,420,854)	(6,606,116)
Average unearned ESOP shares									(837,342)	(882,617)
Average unearned nonvested shares									(41,055)	(42,629)
Weighted-average common shares and common stock equivalents used to calculate basic earnings per share	10,970,947	10,911,469	10,796,353	10,717,138	10,704,554	10,678,856	10,592,997	10,475,032	10,833,844	10,601,733
Additional common stock equivalents (stock options) used to calculate diluted earnings per share										61,724
Weighted-average common shares and common stock equivalents used to calculate diluted earnings per share	10,970,947	10,922,860	10,822,109	10,717,138	10,766,159	10,743,008	10,691,960	10,604,072	10,833,844	10,663,457

Earnings Per Share - Additional

Earnings Per Share - Additional Information (Detail) - Stock Option [Member] - $ / shares	12 Months Ended
	Sep. 30, 2018	Sep. 30, 2017
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Anti-dilutive securities	37,968	43,953
Average weighted price per share of anti-dilutive shares		$ 14.50
Minimum [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Average weighted price per share of anti-dilutive shares	$ 13.52
Maximum [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Average weighted price per share of anti-dilutive shares	$ 16.56

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	Sep. 30, 2018	Sep. 30, 2017
Schedule of Available-for-sale Securities [Line Items]
Available for sale, Amortized Cost	$ 385,831	$ 391,857
Available for sale, Gross Unrealized Gains	388	2,392
Available for sale, Gross Unrealized Losses	(14,781)	(3,797)
Available for sale, Fair Value	371,438	390,452
Fannie Mae [Member]
Schedule of Available-for-sale Securities [Line Items]
Available for sale, Amortized Cost	147,433	119,333
Available for sale, Gross Unrealized Gains	17	207
Available for sale, Gross Unrealized Losses	(5,827)	(1,203)
Available for sale, Fair Value	141,623	118,337
Freddie Mac [Member]
Schedule of Available-for-sale Securities [Line Items]
Available for sale, Amortized Cost	99,587	98,668
Available for sale, Gross Unrealized Gains	2	177
Available for sale, Gross Unrealized Losses	(4,415)	(808)
Available for sale, Fair Value	95,174	98,037
Governmental National Mortgage Association Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Available for sale, Amortized Cost	22,164	17,609
Available for sale, Gross Unrealized Gains		43
Available for sale, Gross Unrealized Losses	(838)	(203)
Available for sale, Fair Value	21,326	17,449
Mortgage-Backed Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Available for sale, Amortized Cost	269,184	235,610
Available for sale, Gross Unrealized Gains	19	427
Available for sale, Gross Unrealized Losses	(11,080)	(2,214)
Available for sale, Fair Value	258,123	233,823
Obligations of States and Political Subdivisions [Member]
Schedule of Available-for-sale Securities [Line Items]
Available for sale, Amortized Cost	42,090	64,382
Available for sale, Gross Unrealized Gains	251	1,522
Available for sale, Gross Unrealized Losses	(1,392)	(546)
Available for sale, Fair Value	40,949	65,358
U.S. Government Agency Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Available for sale, Amortized Cost	5,678	18,615
Available for sale, Gross Unrealized Gains	2	61
Available for sale, Gross Unrealized Losses	(122)	(5)
Available for sale, Fair Value	5,558	18,671
Corporate Obligations [Member]
Schedule of Available-for-sale Securities [Line Items]
Available for sale, Amortized Cost	48,559	49,025
Available for sale, Gross Unrealized Gains	116	335
Available for sale, Gross Unrealized Losses	(1,260)	(618)
Available for sale, Fair Value	47,415	48,742
Other Debt Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Available for sale, Amortized Cost	20,295	24,200
Available for sale, Gross Unrealized Gains		47
Available for sale, Gross Unrealized Losses	(922)	(414)
Available for sale, Fair Value	19,373	23,833
Total Debt Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Available for sale, Amortized Cost	385,806	391,832
Available for sale, Gross Unrealized Gains	388	2,392
Available for sale, Gross Unrealized Losses	(14,776)	(3,797)
Available for sale, Fair Value	371,418	390,427
Equity Securities-Financial Services [Member]
Schedule of Available-for-sale Securities [Line Items]
Available for sale, Amortized Cost	25	25
Available for sale, Gross Unrealized Losses	(5)
Available for sale, Fair Value	$ 20	$ 25

Investment Securities - Schedul

Investment Securities - Schedule of Amortized Cost and Fair Value of Debt Securities by Contractual Maturity (Detail) $ in Thousands	Sep. 30, 2018USD ($)
Available-for-sale Securities, Debt Maturities, Amortized Cost Basis, Fiscal Year Maturity [Abstract]
Due in one year or less, Amortized Cost	$ 512
Due after one year through five years, Amortized Cost	36,589
Due after five years through ten years, Amortized Cost	99,373
Due after ten years, Amortized Cost	249,332
Total, Amortized Cost	385,806
Due in one year or less, Fair Value	512
Due after one year through five years, Fair Value	36,031
Due after five years through ten years, Fair Value	95,654
Due after ten years, Fair Value	239,221
Total, Fair Value	$ 371,418

Investment Securities - Additio

Investment Securities - Additional Information (Detail) - USD ($)	12 Months Ended
	Sep. 30, 2018	Sep. 30, 2017
Amortized Cost And Fair Value Debt Securities [Abstract]
Realized gross gains	$ 511,000	$ 299,000
Proceeds from the sale of investment securities	37,889,000	17,378,000
Realized gross losses	349,000	4,000
Investment securities with carrying values	$ 256,317,000	$ 235,926,000

Investment Securities - Sched_2

Investment Securities - Schedule of Gross Unrealized Losses and Fair Value (Detail) $ in Thousands	Sep. 30, 2018USD ($)Security	Sep. 30, 2017USD ($)Security
Schedule of Available-for-sale Securities [Line Items]
Number of Securities | Security	276	174
Fair Value, Less than Twelve Months	$ 138,094	$ 149,633
Gross Unrealized Losses, Less than Twelve Months	(3,047)	(1,225)
Fair Value, Twelve Months or Greater	203,329	83,272
Gross Unrealized Losses, Twelve Months or Greater	(11,734)	(2,572)
Fair Value, Total	341,423	232,905
Gross Unrealized Losses, Total	$ (14,781)	$ (3,797)
Fannie Mae [Member]
Schedule of Available-for-sale Securities [Line Items]
Number of Securities | Security	100	55
Fair Value, Less than Twelve Months	$ 63,997	$ 61,852
Gross Unrealized Losses, Less than Twelve Months	(1,442)	(558)
Fair Value, Twelve Months or Greater	74,783	20,679
Gross Unrealized Losses, Twelve Months or Greater	(4,385)	(645)
Fair Value, Total	138,780	82,531
Gross Unrealized Losses, Total	$ (5,827)	$ (1,203)
Freddie Mac [Member]
Schedule of Available-for-sale Securities [Line Items]
Number of Securities | Security	74	39
Fair Value, Less than Twelve Months	$ 28,902	$ 38,913
Gross Unrealized Losses, Less than Twelve Months	(830)	(354)
Fair Value, Twelve Months or Greater	65,812	16,427
Gross Unrealized Losses, Twelve Months or Greater	(3,585)	(454)
Fair Value, Total	94,714	55,340
Gross Unrealized Losses, Total	$ (4,415)	$ (808)
Governmental National Mortgage Association Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Number of Securities | Security	19	11
Fair Value, Less than Twelve Months	$ 9,776	$ 6,669
Gross Unrealized Losses, Less than Twelve Months	(142)	(41)
Fair Value, Twelve Months or Greater	11,550	6,903
Gross Unrealized Losses, Twelve Months or Greater	(696)	(162)
Fair Value, Total	21,326	13,572
Gross Unrealized Losses, Total	$ (838)	$ (203)
Obligations of States and Political Subdivisions [Member]
Schedule of Available-for-sale Securities [Line Items]
Number of Securities | Security	25	25
Fair Value, Less than Twelve Months	$ 7,651	$ 10,944
Gross Unrealized Losses, Less than Twelve Months	(105)	(59)
Fair Value, Twelve Months or Greater	21,004	17,425
Gross Unrealized Losses, Twelve Months or Greater	(1,287)	(487)
Fair Value, Total	28,655	28,369
Gross Unrealized Losses, Total	$ (1,392)	$ (546)
U.S. Government Agency Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Number of Securities | Security	3	3
Fair Value, Less than Twelve Months	$ 5,177	$ 8,995
Gross Unrealized Losses, Less than Twelve Months	(122)	(5)
Fair Value, Total	5,177	8,995
Gross Unrealized Losses, Total	$ (122)	$ (5)
Corporate Obligations [Member]
Schedule of Available-for-sale Securities [Line Items]
Number of Securities | Security	34	22
Fair Value, Less than Twelve Months	$ 20,172	$ 15,119
Gross Unrealized Losses, Less than Twelve Months	(363)	(104)
Fair Value, Twelve Months or Greater	13,206	8,032
Gross Unrealized Losses, Twelve Months or Greater	(897)	(514)
Fair Value, Total	33,378	23,151
Gross Unrealized Losses, Total	$ (1,260)	$ (618)
Other Debt Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Number of Securities | Security	20	19
Fair Value, Less than Twelve Months	$ 2,399	$ 7,141
Gross Unrealized Losses, Less than Twelve Months	(38)	(104)
Fair Value, Twelve Months or Greater	16,974	13,806
Gross Unrealized Losses, Twelve Months or Greater	(884)	(310)
Fair Value, Total	19,373	20,947
Gross Unrealized Losses, Total	$ (922)	$ (414)
Equity Securities-Financial Services [Member]
Schedule of Available-for-sale Securities [Line Items]
Number of Securities | Security	1
Fair Value, Less than Twelve Months	$ 20
Gross Unrealized Losses, Less than Twelve Months	(5)
Fair Value, Total	20
Gross Unrealized Losses, Total	$ (5)

Loans Receivable - Summary of L

Loans Receivable - Summary of Loans Receivable (Detail) - USD ($) $ in Thousands	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2016
Real estate loans:
Total Loans	$ 1,316,759	$ 1,246,046
Less allowance for loan losses	11,688	9,365	$ 9,056
Net loans	1,305,071	1,236,681
Obligations of States and Political Subdivisions [Member]
Real estate loans:
Total Loans	73,362	58,079
Less allowance for loan losses	323	248	215
Home Equity Loans and Lines of Credit [Member]
Real estate loans:
Total Loans	43,962	46,219
Less allowance for loan losses	296	470	455
Auto Loans [Member]
Real estate loans:
Total Loans	146,220	186,646
Less allowance for loan losses	1,859	1,836	1,880
Other [Member]
Real estate loans:
Total Loans	2,682	2,845
Less allowance for loan losses	23	21	25
Residential [Member] | Real Estate Loans [Member]
Real estate loans:
Total Loans	580,561	586,708
Less allowance for loan losses	3,605	3,878	4,426
Construction [Member] | Real Estate Loans [Member]
Real estate loans:
Total Loans	3,920	3,097
Less allowance for loan losses	35	23	13
Commercial [Member] | Real Estate Loans [Member]
Real estate loans:
Total Loans	416,573	318,323
Less allowance for loan losses	3,458	1,758	852
Commercial Loans [Member]
Real estate loans:
Total Loans	49,479	44,129
Less allowance for loan losses	$ 1,462	$ 987	$ 882

Loans Receivable - Changes in A

Loans Receivable - Changes in Accretable Yield for Purchased Credit-Impaired Losses (Detail) - USD ($) $ in Thousands	12 Months Ended
	Sep. 30, 2018	Sep. 30, 2017
Receivables [Abstract]
Balance at beginning of period	$ 471	$ 478
Reclassification and other	681	215
Accretion	(1,045)	(222)
Balance at end of period	$ 107	$ 471

Loans Receivable - Additional I

Loans Receivable - Additional Information (Detail)	3 Months Ended								12 Months Ended
	Sep. 30, 2018USD ($)	Jun. 30, 2018USD ($)	Mar. 31, 2018USD ($)	Dec. 31, 2017USD ($)	Sep. 30, 2017USD ($)	Jun. 30, 2017USD ($)	Mar. 31, 2017USD ($)	Dec. 31, 2016USD ($)	Sep. 30, 2018USD ($)Contract	Sep. 30, 2017USD ($)Contract	Sep. 30, 2016USD ($)
Accounts, Notes, Loans and Financing Receivable [Line Items]
Reclassifications of nonaccretable discounts									$ 681,000	$ 215,000
Allowance for loan losses recorded for acquired loans									68,000	155,000
Mortgage loans serviced for others									72,043,000	61,167,000
Purchased impaired loans and non accrual loans	$ 10,511,000				$ 14,263,000				10,511,000	14,263,000
Additional interest income under loan agreements									$ 171,000	449,000
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	1,000,000								$ 1,000,000
Minimum external review amount	1,000,000								1,000,000
Minimum external review criticized relationships amount	500,000								500,000
Provision for loan losses	925,000	$ 975,000	$ 1,100,000	$ 1,000,000	$ 1,100,000	$ 750,000	$ 750,000	$ 750,000	$ 4,000,000	$ 3,350,000
Number of Contracts | Contract									9	11
Number of troubled debt restructuring loans granted terms and rate concessions | Contract									6	6
Troubled debt restructurings granted terms and rate concession									$ 278,000	$ 832,000
Number of troubled debt restructuring loans granted terms concessions | Contract									3	3
Troubled debt restructurings granted terms concession									$ 326,000	$ 1,200,000
Number of troubled debt restructuring loans granted interest rate concession | Contract										2
Troubled debt restructurings loans granted interest rate concession										$ 368,000
Number of troubled debt restructurings, loan modified, defaulted within one year of modification | Contract									1	0
Troubled debt restructurings, loan modified, defaulted within one year of modification									$ 76,000
Consumer Residential Mortgages [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Foreclosed assets	819,000								819,000
Formal foreclosure proceeding assets	$ 2,600,000								$ 2,600,000
Auto Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Provision for loan losses										$ 1,200,000	$ 1,300,000
Maximum [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Percentage of unallocated allowance	10.00%								10.00%

Loans Receivable - Summary of A

Loans Receivable - Summary of Additional Information Regarding Loans Acquired and Accounted (Detail) - USD ($) $ in Thousands	Sep. 30, 2018	Sep. 30, 2017
Accounts, Notes, Loans and Financing Receivable [Line Items]
Carrying amount	$ 1,316,759	$ 1,246,046
Loans Acquired with Deteriorated Credit Quality [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Outstanding balance	2,497	5,490
Carrying amount	$ 1,802	$ 4,388

Loans Receivable - Schedule of

Loans Receivable - Schedule of Loans Evaluated for Impairment (Detail) - USD ($) $ in Thousands	Sep. 30, 2018	Sep. 30, 2017
Financing Receivable, Recorded Investment [Line Items]
Total Loans	$ 1,316,759	$ 1,246,046
Individually Evaluated for Impairment	11,870	15,576
Collectively Evaluated for Impairment	1,303,087	1,226,082
Loans Acquired with Deteriorated Credit Quality [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Loans	1,802	4,388
Obligations of States and Political Subdivisions [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Loans	73,362	58,079
Collectively Evaluated for Impairment	73,362	58,079
Home Equity Loans and Lines of Credit [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Loans	43,962	46,219
Individually Evaluated for Impairment	114	176
Collectively Evaluated for Impairment	43,848	45,713
Home Equity Loans and Lines of Credit [Member] | Loans Acquired with Deteriorated Credit Quality [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Loans		330
Auto Loans [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Loans	146,220	186,646
Individually Evaluated for Impairment	445	572
Collectively Evaluated for Impairment	145,775	186,074
Other [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Loans	2,682	2,845
Individually Evaluated for Impairment	17	30
Collectively Evaluated for Impairment	2,665	2,815
Residential [Member] | Real Estate Loans [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Loans	580,561	586,708
Individually Evaluated for Impairment	5,317	6,202
Collectively Evaluated for Impairment	575,244	580,506
Construction [Member] | Real Estate Loans [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Loans	3,920	3,097
Collectively Evaluated for Impairment	3,920	3,097
Commercial [Member] | Real Estate Loans [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Loans	416,573	318,323
Individually Evaluated for Impairment	5,892	7,211
Collectively Evaluated for Impairment	408,880	307,337
Commercial [Member] | Real Estate Loans [Member] | Loans Acquired with Deteriorated Credit Quality [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Loans	1,801	3,775
Commercial Loans [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Loans	49,479	44,129
Individually Evaluated for Impairment	85	1,385
Collectively Evaluated for Impairment	49,393	42,461
Commercial Loans [Member] | Loans Acquired with Deteriorated Credit Quality [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Loans	$ 1	$ 283

Loans Receivable - Schedule o_2

Loans Receivable - Schedule of Investment and Unpaid Principal Balances for Impaired Loans (Detail) - USD ($)	12 Months Ended
	Sep. 30, 2018	Sep. 30, 2017
Financing Receivable, Impaired [Line Items]
Recorded Investment	$ 11,870,000	$ 15,576,000
Unpaid Principal Balance	15,014,000	21,157,000
Associated Allowance	313,000	345,000
Average Recorded Investment	13,197,000	18,593,000
Interest Income Recognized	366,000	464,000
With no Specific Allowance Recorded [Member]
Financing Receivable, Impaired [Line Items]
Recorded Investment	10,644,000	13,297,000
Unpaid Principal Balance	13,701,000	17,232,000
Average Recorded Investment	11,712,000	16,123,000
Interest Income Recognized	366,000	457,000
With an Allowance Recorded [Member]
Financing Receivable, Impaired [Line Items]
Recorded Investment	1,226,000	2,279,000
Unpaid Principal Balance	1,313,000	3,925,000
Associated Allowance	313,000	345,000
Average Recorded Investment	1,485,000	2,470,000
Interest Income Recognized		7,000
Home Equity Loans and Lines of Credit [Member]
Financing Receivable, Impaired [Line Items]
Recorded Investment	114,000	176,000
Unpaid Principal Balance	138,000	258,000
Average Recorded Investment	174,000	234,000
Interest Income Recognized	1,000
Home Equity Loans and Lines of Credit [Member] | With no Specific Allowance Recorded [Member]
Financing Receivable, Impaired [Line Items]
Recorded Investment	114,000	176,000
Unpaid Principal Balance	138,000	258,000
Average Recorded Investment	161,000	231,000
Interest Income Recognized	1,000
Home Equity Loans and Lines of Credit [Member] | With an Allowance Recorded [Member]
Financing Receivable, Impaired [Line Items]
Average Recorded Investment	13,000	3,000
Auto Loans [Member]
Financing Receivable, Impaired [Line Items]
Recorded Investment	445,000	572,000
Unpaid Principal Balance	598,000	705,000
Associated Allowance	164,000	172,000
Average Recorded Investment	351,000	379,000
Interest Income Recognized	1,000	8,000
Auto Loans [Member] | With no Specific Allowance Recorded [Member]
Financing Receivable, Impaired [Line Items]
Recorded Investment	87,000	123,000
Unpaid Principal Balance	223,000	237,000
Average Recorded Investment	150,000	116,000
Interest Income Recognized	1,000	1,000
Auto Loans [Member] | With an Allowance Recorded [Member]
Financing Receivable, Impaired [Line Items]
Recorded Investment	358,000	449,000
Unpaid Principal Balance	375,000	468,000
Associated Allowance	164,000	172,000
Average Recorded Investment	201,000	263,000
Interest Income Recognized		7,000
Other [Member]
Financing Receivable, Impaired [Line Items]
Recorded Investment	17,000	30,000
Unpaid Principal Balance	25,000	36,000
Average Recorded Investment	27,000	8,000
Other [Member] | With no Specific Allowance Recorded [Member]
Financing Receivable, Impaired [Line Items]
Recorded Investment	17,000	30,000
Unpaid Principal Balance	25,000	36,000
Average Recorded Investment	27,000	8,000
Residential [Member] | Real Estate Loans [Member]
Financing Receivable, Impaired [Line Items]
Recorded Investment	5,317,000	6,202,000
Unpaid Principal Balance	7,114,000	7,994,000
Associated Allowance	149,000	154,000
Average Recorded Investment	5,450,000	7,187,000
Interest Income Recognized	27,000	39,000
Residential [Member] | Real Estate Loans [Member] | With no Specific Allowance Recorded [Member]
Financing Receivable, Impaired [Line Items]
Recorded Investment	4,449,000	4,392,000
Unpaid Principal Balance	6,176,000	5,730,000
Average Recorded Investment	4,192,000	5,373,000
Interest Income Recognized	27,000	39,000
Residential [Member] | Real Estate Loans [Member] | With an Allowance Recorded [Member]
Financing Receivable, Impaired [Line Items]
Recorded Investment	868,000	1,810,000
Unpaid Principal Balance	938,000	2,264,000
Associated Allowance	149,000	154,000
Average Recorded Investment	1,258,000	1,814,000
Commercial [Member] | Real Estate Loans [Member]
Financing Receivable, Impaired [Line Items]
Recorded Investment	5,892,000	7,211,000
Unpaid Principal Balance	6,790,000	10,589,000
Associated Allowance		19,000
Average Recorded Investment	6,445,000	9,176,000
Interest Income Recognized	279,000	297,000
Commercial [Member] | Real Estate Loans [Member] | With no Specific Allowance Recorded [Member]
Financing Receivable, Impaired [Line Items]
Recorded Investment	5,892,000	7,191,000
Unpaid Principal Balance	6,790,000	9,396,000
Average Recorded Investment	6,432,000	8,816,000
Interest Income Recognized	279,000	297,000
Commercial [Member] | Real Estate Loans [Member] | With an Allowance Recorded [Member]
Financing Receivable, Impaired [Line Items]
Recorded Investment		20,000
Unpaid Principal Balance		1,193,000
Associated Allowance		19,000
Average Recorded Investment	13,000	360,000
Commercial Loans [Member]
Financing Receivable, Impaired [Line Items]
Recorded Investment	85,000	1,385,000
Unpaid Principal Balance	349,000	1,575,000
Average Recorded Investment	750,000	1,609,000
Interest Income Recognized	58,000	120,000
Commercial Loans [Member] | With no Specific Allowance Recorded [Member]
Financing Receivable, Impaired [Line Items]
Recorded Investment	85,000	1,385,000
Unpaid Principal Balance	349,000	1,575,000
Average Recorded Investment	750,000	1,579,000
Interest Income Recognized	$ 58,000	120,000
Commercial Loans [Member] | With an Allowance Recorded [Member]
Financing Receivable, Impaired [Line Items]
Average Recorded Investment		$ 30,000

Loans Receivable - Classes of L

Loans Receivable - Classes of Loan Portfolio, Internal Risk Rating System (Detail) - USD ($) $ in Thousands	Sep. 30, 2018	Sep. 30, 2017
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loan, total	$ 1,305,071	$ 1,236,681
Commercial And Municipal Portfolio Segment
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loan, total	539,414	420,531
Commercial And Municipal Portfolio Segment | Commercial [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loan, total	416,573	318,323
Commercial And Municipal Portfolio Segment | Commercial Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loan, total	49,479	44,129
Commercial And Municipal Portfolio Segment | Obligations of States and Political Subdivisions [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loan, total	73,362	58,079
Commercial And Municipal Portfolio Segment | Pass [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loan, total	514,414	399,629
Commercial And Municipal Portfolio Segment | Pass [Member] | Commercial [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loan, total	392,915	300,554
Commercial And Municipal Portfolio Segment | Pass [Member] | Commercial Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loan, total	48,137	40,996
Commercial And Municipal Portfolio Segment | Pass [Member] | Obligations of States and Political Subdivisions [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loan, total	73,362	58,079
Commercial And Municipal Portfolio Segment | Special Mention [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loan, total	8,968	3,408
Commercial And Municipal Portfolio Segment | Special Mention [Member] | Commercial [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loan, total	8,960	3,376
Commercial And Municipal Portfolio Segment | Special Mention [Member] | Commercial Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loan, total	8	32
Commercial And Municipal Portfolio Segment | Substandard [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loan, total	16,032	17,494
Commercial And Municipal Portfolio Segment | Substandard [Member] | Commercial [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loan, total	14,698	14,393
Commercial And Municipal Portfolio Segment | Substandard [Member] | Commercial Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loan, total	$ 1,334	$ 3,101

Loans Receivable - Schedule o_3

Loans Receivable - Schedule of Performing or Nonperforming Loans (Detail) - USD ($) $ in Thousands	Sep. 30, 2018	Sep. 30, 2017
Financing Receivable, Recorded Investment [Line Items]
Total	$ 1,305,071	$ 1,236,681
Consumer Portfolio Segment [Member]
Financing Receivable, Recorded Investment [Line Items]
Total	777,345	825,515
Purchased Credit Impaired [Member] | Consumer Portfolio Segment [Member]
Financing Receivable, Recorded Investment [Line Items]
Total		330
Home Equity Loans and Lines of Credit [Member] | Consumer Portfolio Segment [Member]
Financing Receivable, Recorded Investment [Line Items]
Total	43,962	46,219
Home Equity Loans and Lines of Credit [Member] | Purchased Credit Impaired [Member] | Consumer Portfolio Segment [Member]
Financing Receivable, Recorded Investment [Line Items]
Total		330
Auto Loans [Member] | Consumer Portfolio Segment [Member]
Financing Receivable, Recorded Investment [Line Items]
Total	146,220	186,646
Other [Member] | Consumer Portfolio Segment [Member]
Financing Receivable, Recorded Investment [Line Items]
Total	2,682	2,845
Residential [Member] | Real Estate Loans [Member] | Consumer Portfolio Segment [Member]
Financing Receivable, Recorded Investment [Line Items]
Total	580,561	586,708
Construction [Member] | Real Estate Loans [Member] | Consumer Portfolio Segment [Member]
Financing Receivable, Recorded Investment [Line Items]
Total	3,920	3,097
Performing [Member] | Consumer Portfolio Segment [Member]
Financing Receivable, Recorded Investment [Line Items]
Total	771,207	817,506
Performing [Member] | Home Equity Loans and Lines of Credit [Member] | Consumer Portfolio Segment [Member]
Financing Receivable, Recorded Investment [Line Items]
Total	43,746	45,576
Performing [Member] | Auto Loans [Member] | Consumer Portfolio Segment [Member]
Financing Receivable, Recorded Investment [Line Items]
Total	145,633	185,910
Performing [Member] | Other [Member] | Consumer Portfolio Segment [Member]
Financing Receivable, Recorded Investment [Line Items]
Total	2,664	2,807
Performing [Member] | Residential [Member] | Real Estate Loans [Member] | Consumer Portfolio Segment [Member]
Financing Receivable, Recorded Investment [Line Items]
Total	575,244	580,116
Performing [Member] | Construction [Member] | Real Estate Loans [Member] | Consumer Portfolio Segment [Member]
Financing Receivable, Recorded Investment [Line Items]
Total	3,920	3,097
Nonperforming [Member] | Consumer Portfolio Segment [Member]
Financing Receivable, Recorded Investment [Line Items]
Total	6,138	7,679
Nonperforming [Member] | Home Equity Loans and Lines of Credit [Member] | Consumer Portfolio Segment [Member]
Financing Receivable, Recorded Investment [Line Items]
Total	216	313
Nonperforming [Member] | Auto Loans [Member] | Consumer Portfolio Segment [Member]
Financing Receivable, Recorded Investment [Line Items]
Total	587	736
Nonperforming [Member] | Other [Member] | Consumer Portfolio Segment [Member]
Financing Receivable, Recorded Investment [Line Items]
Total	18	38
Nonperforming [Member] | Residential [Member] | Real Estate Loans [Member] | Consumer Portfolio Segment [Member]
Financing Receivable, Recorded Investment [Line Items]
Total	$ 5,317	$ 6,592

Loans Receivable - Classes of_2

Loans Receivable - Classes of Loan Portfolio Summarized by Aging Categories (Detail) - USD ($) $ in Thousands	Sep. 30, 2018	Sep. 30, 2017
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current	$ 1,301,224	$ 1,227,102
31-60 Days Past Due	3,818	3,597
61-90 Days Past Due	951	472
Non-accrual	8,964	10,487
Total Past Due	13,733	14,556
Purchased Credit Impaired, Accruing	255	612
Purchased Credit Impaired, Nonaccrual	1,547	3,776
Total Loans	1,316,759	1,246,046
Obligations of States and Political Subdivisions [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current	73,362	58,079
Total Loans	73,362	58,079
Home Equity Loans and Lines of Credit [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current	43,716	45,460
31-60 Days Past Due	30	101
61-90 Days Past Due		15
Non-accrual	216	313
Total Past Due	246	429
Purchased Credit Impaired, Nonaccrual		330
Total Loans	43,962	46,219
Auto Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current	144,140	185,247
31-60 Days Past Due	1,473	631
61-90 Days Past Due	20	32
Non-accrual	587	736
Total Past Due	2,080	1,399
Total Loans	146,220	186,646
Other [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current	2,647	2,789
31-60 Days Past Due	17	14
61-90 Days Past Due		4
Non-accrual	18	38
Total Past Due	35	56
Total Loans	2,682	2,845
Residential [Member] | Real Estate Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current	572,236	577,034
31-60 Days Past Due	2,088	2,661
61-90 Days Past Due	920	421
Non-accrual	5,317	6,592
Total Past Due	8,325	9,674
Total Loans	580,561	586,708
Construction [Member] | Real Estate Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current	3,920	3,097
Total Loans	3,920	3,097
Commercial [Member] | Real Estate Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current	412,636	312,098
31-60 Days Past Due	185	172
Non-accrual	1,951	2,278
Total Past Due	2,136	2,450
Purchased Credit Impaired, Accruing	255	612
Purchased Credit Impaired, Nonaccrual	1,546	3,163
Total Loans	416,573	318,323
Commercial Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current	48,567	43,298
31-60 Days Past Due	25	18
61-90 Days Past Due	11
Non-accrual	875	530
Total Past Due	911	548
Purchased Credit Impaired, Nonaccrual	1	283
Total Loans	$ 49,479	$ 44,129

Loans Receivable - Summary of P

Loans Receivable - Summary of Primary Segments of ALL (Detail) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2017	Sep. 30, 2017	Jun. 30, 2017	Mar. 31, 2017	Dec. 31, 2016	Sep. 30, 2018	Sep. 30, 2017
Financing Receivable, Allowance for Credit Losses [Line Items]
Balance, Beginning of period				$ 9,365				$ 9,056	$ 9,365	$ 9,056
Charge-offs									(2,462)	(3,923)
Recoveries									785	882
Provision	$ 925	$ 975	$ 1,100	1,000	$ 1,100	$ 750	$ 750	750	4,000	3,350
Balance, End of period	11,688				9,365				11,688	9,365
Individually evaluated for impairment	313				345				313	345
Collectively evaluated for impairment	11,375				9,020				11,375	9,020
Obligations of States and Political Subdivisions [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Balance, Beginning of period				248				215	248	215
Provision									75	33
Balance, End of period	323				248				323	248
Collectively evaluated for impairment	323				248				323	248
Home Equity Loans and Lines of Credit [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Balance, Beginning of period				470				455	470	455
Charge-offs									(68)	(18)
Recoveries									54	8
Provision									(160)	25
Balance, End of period	296				470				296	470
Collectively evaluated for impairment	296				470				296	470
Auto Loans [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Balance, Beginning of period				1,836				1,880	1,836	1,880
Charge-offs									(1,833)	(2,009)
Recoveries									655	815
Provision									1,201	1,150
Balance, End of period	1,859				1,836				1,859	1,836
Individually evaluated for impairment	164				172				164	172
Collectively evaluated for impairment	1,695				1,664				1,695	1,664
Other [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Balance, Beginning of period				21				25	21	25
Charge-offs									(21)	(9)
Recoveries									5	9
Provision									18	(4)
Balance, End of period	23				21				23	21
Collectively evaluated for impairment	23				21				23	21
Residential [Member] | Real Estate Loans [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Balance, Beginning of period				3,878				4,426	3,878	4,426
Charge-offs									(335)	(504)
Recoveries									12	22
Provision									50	(66)
Balance, End of period	3,605				3,878				3,605	3,878
Individually evaluated for impairment	149				154				149	154
Collectively evaluated for impairment	3,456				3,724				3,456	3,724
Construction [Member] | Real Estate Loans [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Balance, Beginning of period				23				13	23	13
Provision									12	10
Balance, End of period	35				23				35	23
Collectively evaluated for impairment	35				23				35	23
Commercial [Member] | Real Estate Loans [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Balance, Beginning of period				1,758				852	1,758	852
Charge-offs									(54)	(1,352)
Recoveries									49	27
Provision									1,705	2,231
Balance, End of period	3,458				1,758				3,458	1,758
Individually evaluated for impairment					19					19
Collectively evaluated for impairment	3,458				1,739				3,458	1,739
Commercial Loans [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Balance, Beginning of period				987				882	987	882
Charge-offs									(151)	(31)
Recoveries									10	1
Provision									616	135
Balance, End of period	1,462				987				1,462	987
Collectively evaluated for impairment	1,462				987				1,462	987
Unallocated [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Balance, Beginning of period				$ 144				$ 308	144	308
Provision									483	(164)
Balance, End of period	627				144				627	144
Collectively evaluated for impairment	$ 627				$ 144				$ 627	$ 144

Loans Receivable - Summary of T

Loans Receivable - Summary of Troubled Debt Restructurings Granted (Detail) $ in Thousands	12 Months Ended
	Sep. 30, 2018USD ($)Contract	Sep. 30, 2017USD ($)Contract
Financing Receivable, Modifications [Line Items]
Number of Contracts | Contract	9	11
Real Estate Loans [Member] | Residential [Member]
Financing Receivable, Modifications [Line Items]
Number of Contracts | Contract	3	6
Pre-Modification Outstanding Recorded Investment	$ 446	$ 1,154
Post-Modification Outstanding Recorded Investment	$ 446	$ 1,167
Real Estate Loans [Member] | Commercial [Member]
Financing Receivable, Modifications [Line Items]
Number of Contracts | Contract	2	2
Pre-Modification Outstanding Recorded Investment	$ 123	$ 1,208
Post-Modification Outstanding Recorded Investment	$ 123	$ 1,163
Auto Loans [Member]
Financing Receivable, Modifications [Line Items]
Number of Contracts | Contract	4	2
Pre-Modification Outstanding Recorded Investment	$ 35	$ 37
Post-Modification Outstanding Recorded Investment	$ 35	$ 37
Other [Member]
Financing Receivable, Modifications [Line Items]
Number of Contracts | Contract		1
Pre-Modification Outstanding Recorded Investment		$ 22
Post-Modification Outstanding Recorded Investment		$ 22
Troubled Debt Restructurings [Member]
Financing Receivable, Modifications [Line Items]
Number of Contracts | Contract	9	11
Pre-Modification Outstanding Recorded Investment	$ 604	$ 2,421
Post-Modification Outstanding Recorded Investment	$ 604	$ 2,389

Premises and Equipment - Compos

Premises and Equipment - Composition of Premises and Equipment (Detail) - USD ($) $ in Thousands	Sep. 30, 2018	Sep. 30, 2017
Property Plant And Equipment Useful Life And Values [Abstract]
Land and land improvements	$ 6,044	$ 6,269
Buildings and leasehold improvements	16,207	17,047
Furniture, fixtures, and equipment	11,687	11,412
Construction in process		30
Premises and equipment Gross	33,938	34,758
Less accumulated depreciation	(19,337)	(18,524)
Total	$ 14,601	$ 16,234

Premises and Equipment - Additi

Premises and Equipment - Additional Information (Detail) - USD ($)	12 Months Ended
	Sep. 30, 2018	Sep. 30, 2017
Property Plant And Equipment Useful Life And Values [Abstract]
Depreciation Expense	$ 694,000	$ 1,077,000

Deposits - Schedule of Deposits

Deposits - Schedule of Deposits and Respective Weighted-Average Interest Rates by Major Classifications (Detail) - USD ($) $ in Thousands	Sep. 30, 2018	Sep. 30, 2017
Deposits [Line Items]
Weighted Average Interest Rate, Noninterest-bearing demand accounts	0.00%	0.00%
Weighted Average Interest Rate, Interest bearing demand accounts	0.39%	0.24%
Weighted Average Interest Rate, Money market accounts	0.89%	0.51%
Weighted Average Interest Rate, Savings and club accounts	0.05%	0.05%
Weighted Average Interest Rate, Certificates of deposit	1.76%	1.39%
Weighted Average Interest Rate, Total	0.96%	0.70%
Noninterest-bearing demand accounts	$ 158,340	$ 160,125
Interest bearing demand accounts	221,327	208,369
Money market accounts	296,078	253,949
Savings and club accounts	135,862	141,521
Certificates of deposit	525,248	510,897
Total	$ 1,336,855	$ 1,274,861
0.00 - 2.00% [Member]
Deposits [Line Items]
Weighted Average Interest Rate, Certificates of deposit	1.58%	1.30%
Certificates of deposit	$ 395,583	$ 460,132
2.01 - 4.00% [Member]
Deposits [Line Items]
Weighted Average Interest Rate, Certificates of deposit	2.29%	2.19%
Certificates of deposit	$ 129,665	$ 50,765

Deposits - Scheduled Maturities

Deposits - Scheduled Maturities of Certificates of Deposit (Detail) - USD ($) $ in Thousands	Sep. 30, 2018	Sep. 30, 2017
Banking And Thrift [Abstract]
2,019	$ 379,865
2,020	93,820
2,021	17,914
2,022	26,583
2,023	7,066
Total	$ 525,248	$ 510,897

Deposits - Additional Informati

Deposits - Additional Information (Detail) - USD ($)	12 Months Ended
	Sep. 30, 2018	Sep. 30, 2017
Banking And Thrift [Abstract]
Brokered deposits Total	$ 168,694,000	$ 137,736,000
Aggregate amount of time certificates of deposit	66,279,000	$ 71,073,000
Aggregate amount of time certificates of deposit with a minimum denomination	$ 250,000

Deposits - Scheduled Maturiti_2

Deposits - Scheduled Maturities of Certificates of Deposit in Denominations (Detail) - USD ($)	Sep. 30, 2018	Sep. 30, 2017
Banking And Thrift [Abstract]
Within three months	$ 13,294,000
Three through six months	7,131,000
Six through twelve months	32,276,000
Over twelve months	13,578,000
Total	$ 66,279,000	$ 71,073,000

Short-Term Borrowings - Additio

Short-Term Borrowings - Additional Information (Detail) - USD ($)	Sep. 30, 2018	Sep. 30, 2017
Debt Disclosure [Abstract]
Short-term borrowings	$ 179,773,000	$ 137,446,000
Advances on line of credit with the FHLB	64,800,000	$ 10,000,000
Line of credit with the FHLB	150,000,000
Borrowing limit	$ 648,900,000

Short-Term Borrowings - Schedul

Short-Term Borrowings - Schedule of Short-Term Borrowings (Detail) - USD ($) $ in Thousands	12 Months Ended
	Sep. 30, 2018	Sep. 30, 2017
Debt Disclosure [Abstract]
Balance at year-end	$ 179,773	$ 137,466
Maximum amount outstanding at any month-end	260,797	185,201
Average balance outstanding during the year	$ 210,050	$ 147,765
Weighted-average interest rate:
As of year-end	2.31%	1.36%
Paid during the year	1.86%	0.98%

Other Borrowings - Contractual

Other Borrowings - Contractual Maturities of FHLB Long-term Advances (Detail) - USD ($) $ in Thousands	Sep. 30, 2018	Sep. 30, 2017
Federal Home Loan Bank Advances [Line Items]
Advances from Federal Home Loan Banks	$ 118,723	$ 174,168
Convertible [Member]
Federal Home Loan Bank Advances [Line Items]
Advances from Federal Home Loan Banks		5,000
Fixed Rate [Member]
Federal Home Loan Bank Advances [Line Items]
Maturity Range From	2,018
Maturity Range To	2,020
Advances from Federal Home Loan Banks	$ 43,896	75,601
Fixed Rate [Member] | Weighted-Average [Member]
Federal Home Loan Bank Advances [Line Items]
Interest Rate	1.77%
Fixed Rate [Member] | Minimum [Member]
Federal Home Loan Bank Advances [Line Items]
Interest Rate	1.33%
Fixed Rate [Member] | Maximum [Member]
Federal Home Loan Bank Advances [Line Items]
Interest Rate	2.85%
Mid-Term [Member]
Federal Home Loan Bank Advances [Line Items]
Maturity Range From	2,018
Maturity Range To	2,021
Advances from Federal Home Loan Banks	$ 74,827	$ 93,567
Mid-Term [Member] | Weighted-Average [Member]
Federal Home Loan Bank Advances [Line Items]
Interest Rate	1.90%
Mid-Term [Member] | Minimum [Member]
Federal Home Loan Bank Advances [Line Items]
Interest Rate	1.02%
Mid-Term [Member] | Maximum [Member]
Federal Home Loan Bank Advances [Line Items]
Interest Rate	2.57%

Other Borrowings - Maturities o

Other Borrowings - Maturities of FHLB Long-term Advances (Detail) - USD ($) $ in Thousands	Sep. 30, 2018	Sep. 30, 2017
Federal Home Loan Bank, Advances, Fiscal Year Maturity [Abstract]
2019, Amount	$ 75,247
2020, Amount	30,846
2021, Amount	12,630
Total, Amount	$ 118,723	$ 174,168
2019, Weighted-Average Rate	1.71%
2020, Weighted-Average Rate	2.02%
2021, Weighted-Average Rate	2.30%
Weighted-Average [Member]
Federal Home Loan Bank, Advances, Fiscal Year Maturity [Abstract]
Total, Weighted-Average Rate	1.85%

Income Taxes - Schedule of Prov

Income Taxes - Schedule of Provision for Income Taxes (Detail) - USD ($)	3 Months Ended								12 Months Ended
	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2017	Sep. 30, 2017	Jun. 30, 2017	Mar. 31, 2017	Dec. 31, 2016	Sep. 30, 2018	Sep. 30, 2017
Income Tax Disclosure [Abstract]
Federal									$ 1,086,000	$ 837,000
State									6,000
Total current taxes									1,092,000	837,000
Deferred income tax benefit									890,000	754,000
Change in corporate tax rate									3,682,000
Actual tax expense and effective rate, Amount	$ 542,000	$ 500,000	$ 529,000	$ 4,093,000	$ 540,000	$ 448,000	$ 203,000	$ 400,000	$ 5,664,000	$ 1,591,000

Income Taxes - Schedule of Chan

Income Taxes - Schedule of Changes in Significant Portions of the Deferred Tax Assets and Deferred Tax Liabilities (Detail) - USD ($) $ in Thousands	Sep. 30, 2018	Sep. 30, 2017
Deferred tax assets:
Allowance for loan losses	$ 2,455	$ 3,184
Adjustment to record funded status of pension plan	127	324
Investment losses subject to Section 382 limitation	2,510	4,562
Purchase accounting adjustment	4	341
Net unrealized loss on securities	3,022	478
Deferred compensation	290	631
Other real estate owned	152	273
Nonaccrual interest	163	223
Employee stock ownership plan	491	750
Alternative minimum tax	604	577
Other	1,304	2,058
Total gross deferred tax assets	11,122	13,401
Deferred tax liabilities:
Pension plan	675	924
Mortgage servicing rights	44	80
Premises and equipment	45	12
Net unrealized gain on derivatives	515	413
Low income housing tax credits	684	978
Other	718	572
Total gross deferred tax liabilities	2,681	2,979
Net deferred tax assets	$ 8,441	$ 10,422

Income Taxes - Additional Infor

Income Taxes - Additional Information (Detail)	12 Months Ended
	Sep. 30, 2018USD ($)
Income Tax Disclosure [Abstract]
Unrecognized tax benefits	$ 0
Uncertain tax position	0
Income tax expense increased due to Tax Act	$ 3,682,000
Effective income tax rate	11.50%
Retained earnings	$ 4,600,000
Provision for federal income tax	$ 0

Income Taxes - Schedule of Reco

Income Taxes - Schedule of Reconciliation of the Federal Statutory Rate and the Effective Income Tax Rate (Detail) - USD ($)	3 Months Ended								12 Months Ended
	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2017	Sep. 30, 2017	Jun. 30, 2017	Mar. 31, 2017	Dec. 31, 2016	Sep. 30, 2018	Sep. 30, 2017
Income Tax Disclosure [Abstract]
Provision at statutory rate, Amount									$ 2,961,000	$ 3,036,000
Income from bank-owned life insurance, Amount									(243,000)	(351,000)
Tax-exempt income, Amount									(421,000)	(843,000)
Low-income housing credits, Amount									(167,000)	(197,000)
Tax rate change, Amount									3,682,000
Other, net, Amount									(148,000)	(54,000)
Actual tax expense and effective rate, Amount	$ 542,000	$ 500,000	$ 529,000	$ 4,093,000	$ 540,000	$ 448,000	$ 203,000	$ 400,000	$ 5,664,000	$ 1,591,000
Provision at statutory rate, Percentage of pretax income									24.30%	34.00%
Income from bank-owned life insurance, Percentage of pretax income									(2.00%)	(3.90%)
Tax-exempt income, Percentage of pretax income									(3.50%)	(9.50%)
Low-income housing credits, Percentage of pretax income									(1.40%)	(2.20%)
Tax rate change, Percentage of pretax income									30.20%
Other, net, Percentage of pretax income									(1.20%)	(0.60%)
Actual tax expense and effective rate, Percentage of pretax income									46.40%	17.80%

Commitments and Contingent Li_3

Commitments and Contingent Liabilities - Components of Off Balance Sheet Commitments (Detail) - USD ($) $ in Thousands	Sep. 30, 2018	Sep. 30, 2017
Standby Letters of Credit [Member]
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]
Off balance sheet commitments	$ 5,329	$ 2,810
Commitments to Extend Credit [Member]
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]
Off balance sheet commitments	112,037	67,265
Unfunded Lines of Credit [Member]
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]
Off balance sheet commitments	$ 96,618	$ 77,390

Commitments and Contingent Li_4

Commitments and Contingent Liabilities - Additional Information (Detail) - USD ($)	3 Months Ended	12 Months Ended
	Mar. 31, 2018	Sep. 30, 2018
Commitments And Contingencies Disclosure [Abstract]
Contract Maturity Period		Less than one year
Coverage Period for Instrument		1 year
Reserve balance		$ 1,200,000
Amount the plaintiff seeks from the bank	$ 1,325,000
Estimate of possible loss to the bank		$ 125,000

Lease Commitments and Total R_3

Lease Commitments and Total Rental Expense - Future Minimum Lease Payments By Year and in the Aggregate (Detail) $ in Thousands	Sep. 30, 2018USD ($)
Commitments And Contingencies Disclosure [Abstract]
2,019	$ 859
2,020	782
2,021	596
2,022	453
2,023	386
2024 and beyond	925
Total	$ 4,001

Lease Commitments and Total R_4

Lease Commitments and Total Rental Expense - Additional Information (Detail) $ in Millions	12 Months Ended
	Sep. 30, 2018USD ($)Office	Sep. 30, 2017USD ($)
Commitments And Contingencies Disclosure [Abstract]
Total rental expenses | $	$ 1.3	$ 1.3
Number of offices | Office	4

Employee Benefits - Additional

Employee Benefits - Additional Information (Detail) - USD ($)

Aug. 31, 2018

Dec. 06, 2017

Oct. 23, 2017

Mar. 29, 2017

Dec. 13, 2016

Mar. 04, 2016

May 20, 2015

Jul. 22, 2014

Apr. 01, 2013

May 23, 2008

Sep. 30, 2018

Sep. 30, 2017

Compensation Related Costs Disclosure [Line Items]

Service Period

1 year

Age of Employee

21 years

Acquired Shares of the Company's Stock

1,358,472

Outstanding loan interest

4.50%

Recognized ESOP expense

$ 725,000

$ 686,000

Stock option granted

0

Option vesting period

5 years

Option expiration period

10 years

Share-based compensation expense

$ 350,000

331,000

Defined benefit plan curtailment

4,579,000

Reduction in accumulated other comprehensive loss

3,022,000

Accumulated benefit obligation

17,111,000

18,598,000

Estimated net loss

0

Expected contribution of bank

0

Estimated present value of benefits under plan

$ 2,100,000

1,600,000

Supplemental executive retirement plan discounting rate for present value calculation

6.00%

Expense related to supplemental executive retirement plan

$ 477,000

447,000

Minimum [Member]

Compensation Related Costs Disclosure [Line Items]

Supplemental executive retirement plan minimum period

192 months

Qualified Plan [Member]

Compensation Related Costs Disclosure [Line Items]

Allocated share based compensation expense

$ 464,000

251,000

Equity [Member]

Compensation Related Costs Disclosure [Line Items]

Target allocation of cash and fixed income

65.00%

Cash and Fixed Income [Member]

Compensation Related Costs Disclosure [Line Items]

Target allocation of cash and fixed income

35.00%

Equity Incentive Plan [Member]

Compensation Related Costs Disclosure [Line Items]

Common stock issuance, Grant

2,377,326

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

Restricted stock granted

2,000

24,278

1,250

3,296

20,675

23,491

21,843

19,880

30,000

590,320

Share-based compensation expense

$ 336,000

$ 318,000

Restricted Stock [Member] | 2013 [Member]

Compensation Related Costs Disclosure [Line Items]

Restricted shares vesting period

18 months

Restricted Stock [Member] | 2014 [Member]

Compensation Related Costs Disclosure [Line Items]

Restricted shares vesting period

39 months

Restricted Stock [Member] | 2015 [Member]

Compensation Related Costs Disclosure [Line Items]

Restricted shares vesting period

40 months

Restricted Stock [Member] | March 4, 2016 [Member]

Compensation Related Costs Disclosure [Line Items]

Restricted shares vesting period

43 months

Restricted Stock [Member] | December 13, 2016 [Member]

Compensation Related Costs Disclosure [Line Items]

Restricted shares vesting period

46 months

Restricted Stock [Member] | March 29, 2017 [Member] | Tranche One [Member]

Compensation Related Costs Disclosure [Line Items]

Restricted shares vesting period

42 months

Restricted shares vested, Number of shares

1,296

Restricted Stock [Member] | March 29, 2017 [Member] | Tranche Two [Member]

Compensation Related Costs Disclosure [Line Items]

Restricted shares vesting period

18 months

Restricted shares vested, Number of shares

2,000

Restricted Stock [Member] | October 23, 2017 [Member]

Compensation Related Costs Disclosure [Line Items]

Restricted shares vesting period

23 months

Restricted Stock [Member] | December 6, 2017 [Member]

Compensation Related Costs Disclosure [Line Items]

Restricted shares vesting period

46 months

Restricted Stock [Member] | August, 2018 [Member]

Compensation Related Costs Disclosure [Line Items]

Restricted shares vesting period

24 months

Expected future expense

$ 31,000

Remaining vesting periods

1 year 10 months 24 days

Restricted Stock [Member] | March 2016 [Member]

Compensation Related Costs Disclosure [Line Items]

Expected future expense

$ 76,000

Remaining vesting periods

1 year

Restricted Stock [Member] | December 2016 [Member]

Compensation Related Costs Disclosure [Line Items]

Expected future expense

$ 149,000

Remaining vesting periods

2 years

Restricted Stock [Member] | March 2017 [Member]

Compensation Related Costs Disclosure [Line Items]

Outstanding nonvested restricted stock

1,296

Expected future expense

$ 11,000

Remaining vesting periods

2 years

Restricted Stock [Member] | October 2017 [Member]

Compensation Related Costs Disclosure [Line Items]

Expected future expense

$ 10,000

Remaining vesting periods

1 year

Restricted Stock [Member] | December 2017 [Member]

Compensation Related Costs Disclosure [Line Items]

Expected future expense

$ 276,000

Remaining vesting periods

3 years

Non Qualified Stock Option [Member]

Compensation Related Costs Disclosure [Line Items]

Stock option granted

1,140,469

Incentive Stock Option [Member]

Compensation Related Costs Disclosure [Line Items]

Stock option granted

317,910

Employee Benefits - Components

Employee Benefits - Components of the ESOP Shares (Detail) - USD ($) $ in Thousands	Sep. 30, 2018	Sep. 30, 2017
Compensation Related Costs [Abstract]
Allocated shares	345,455	359,711
Shares committed to be released	33,962	33,962
Unreleased shares	826,403	871,686
Total ESOP shares	1,205,820	1,265,359
Fair value of unreleased shares	$ 13,437	$ 13,685

Employee Benefits - Schedule of

Employee Benefits - Schedule of Stock Option Activity (Detail) - USD ($) $ / shares in Units, $ in Thousands	12 Months Ended
	Sep. 30, 2018	Sep. 30, 2017
Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]
Number of Stock Options, Outstanding, September 30, 2017	294,646
Number of Stock Options, Granted	0
Number of Stock Options, Exercised	294,646
Number of Stock Options, Forfeited	0
Number of Stock Options, Outstanding, September 30, 2018		294,646
Number of Stock Options, Exercisable at year-end	0
Weighted-average Exercise Price, Outstanding, September 30, 2017	$ 12.35
Weighted-average Exercise Price, Granted	0
Weighted-average Exercise Price, Exercised	12.35
Weighted-average Exercise Price, Forfeited	0
Weighted-average Exercise Price, Outstanding, September 30, 2018		$ 12.35
Weighted-average Exercise Price, Exercisable at year-end	$ 0
Weighted-average Remaining Contractual Term (in years), Outstanding	0 years	8 months 1 day
Weighted-average Remaining Contractual Term (in years), Granted	0 years
Weighted-average Remaining Contractual Term (in years), Exercised	0 years
Weighted-average Remaining Contractual Term (in years), Forfeited	0 years
Weighted-average Remaining Contractual Term (in years), Exercisable	0 years
Aggregate Intrinsic Value, Outstanding, Beginning Balance	$ 987
Aggregate Intrinsic Value, Granted	0
Aggregate Intrinsic Value, Exercised	0
Aggregate Intrinsic Value, Forfeited	0
Aggregate Intrinsic Value, Outstanding, Ending Balance	0	$ 987
Aggregate Intrinsic Value, Exercisable at year-end	$ 0

Employee Benefits - Schedule _2

Employee Benefits - Schedule of Nonvested Restricted Stock Option Activity (Detail) - Restricted Stock [Member]	12 Months Ended
	Sep. 30, 2018$ / sharesshares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of Restricted Stock, Nonvested at September 30, 2017 | shares	34,692
Number of Restricted Stock, Granted | shares	27,528
Number of Restricted Stock, Vested | shares	(20,814)
Number of Restricted Stock, Forfeited | shares	(6,334)
Number of Restricted Stock, Nonvested at September 30, 2018 | shares	35,072
Weighted-average Grant Date Fair Value, Nonvested at September 30, 2017 | $ / shares	$ 14.89
Weighted-average Grant Date Fair Value, Granted | $ / shares	15.37
Weighted-average Grant Date Fair Value, Vested | $ / shares	14.58
Weighted-average Grant Date Fair Value, Forfeited | $ / shares	15.32
Weighted-average Grant Date Fair Value, Nonvested at September 30, 2018 | $ / shares	$ 15.37

Employee Benefits - Summary of

Employee Benefits - Summary of Change in Plan Assets and Benefit Obligation (Detail) - USD ($)	12 Months Ended
	Sep. 30, 2018	Sep. 30, 2017
Compensation Related Costs [Abstract]
Projected benefit obligation at beginning of year	$ 18,598,000	$ 25,470,000
Service cost		516,000
Interest cost	698,000	859,000
Actuarial (gains) losses	(204,000)	(2,857,000)
Curtailment (Plan Freeze)		(4,579,000)
Benefits paid	(1,981,000)	(811,000)
Projected benefit obligation at end of year	17,111,000	18,598,000
Fair value of plan assets at beginning of year	20,363,000	19,188,000
Actual return on plan assets	1,338,000	1,986,000
Benefits paid	(1,981,000)	(811,000)
Fair value of plan assets at end of year	19,720,000	20,363,000
Funded status	$ 2,609,000	$ 1,765,000

Employee Benefits - Summary o_2

Employee Benefits - Summary of the Components of Net Periodic Pension Cost (Detail) - USD ($) $ in Thousands	Sep. 30, 2018	Sep. 30, 2017
Compensation Related Costs [Abstract]
Net loss	$ 604	$ 953

Employee Benefits - Summary o_3

Employee Benefits - Summary of the Components of Net Periodic Benefit Cost (Detail) - USD ($) $ in Thousands	12 Months Ended
	Sep. 30, 2018	Sep. 30, 2017
Compensation Related Costs [Abstract]
Service cost		$ 516
Interest cost	$ 698	859
Expected return on plan assets	(1,193)	(1,385)
Amortization of unrecognized loss		226
Net periodic (benefit) cost	$ (495)	$ 216

Employee Benefits - Schedule _3

Employee Benefits - Schedule of Weighted-Average Assumptions (Detail)	Sep. 30, 2018	Sep. 30, 2017
Compensation Related Costs [Abstract]
Discount rate	4.10%	3.85%

Employee Benefits - Schedule _4

Employee Benefits - Schedule of Assumptions Used to Determine Net Periodic Benefit Cost (Detail)	12 Months Ended
	Sep. 30, 2018	Sep. 30, 2017
Compensation Related Costs [Abstract]
Discount rate	3.85%	4.10%
Expected long-term return on plan assets	6.00%	7.00%

Employee Benefits - Summary o_4

Employee Benefits - Summary of the Plan's Financial Assets at Fair Value, Within the Fair Value Hierarchy (Detail) - USD ($) $ in Thousands	Sep. 30, 2018	Sep. 30, 2017
Defined Benefit Plan Disclosure [Line Items]
Total assets at fair value	$ 19,720	$ 20,363
Level II [Member]
Defined Benefit Plan Disclosure [Line Items]
Total assets at fair value	19,720	20,363
Investment in Collective Trusts Fixed Income [Member]
Defined Benefit Plan Disclosure [Line Items]
Total assets at fair value	7,916	7,999
Investment in Collective Trusts Fixed Income [Member] | Level II [Member]
Defined Benefit Plan Disclosure [Line Items]
Total assets at fair value	7,916	7,999
Investment in Collective Trusts Equity [Member]
Defined Benefit Plan Disclosure [Line Items]
Total assets at fair value	11,789	12,353
Investment in Collective Trusts Equity [Member] | Level II [Member]
Defined Benefit Plan Disclosure [Line Items]
Total assets at fair value	11,789	12,353
Investment in Short-Term Investments [Member]
Defined Benefit Plan Disclosure [Line Items]
Total assets at fair value	15	11
Investment in Short-Term Investments [Member] | Level II [Member]
Defined Benefit Plan Disclosure [Line Items]
Total assets at fair value	$ 15	$ 11

Employee Benefits - The Bank's

Employee Benefits - The Bank's Defined Benefit Pension Plan Weighted-Average Asset Allocations (Detail)	Sep. 30, 2018	Sep. 30, 2017
Defined Benefit Plan Disclosure [Line Items]
Total Defined Benefit Plan, Actual Plan Asset Allocations	100.00%	100.00%
Fixed Income Securities [Member]
Defined Benefit Plan Disclosure [Line Items]
Total Defined Benefit Plan, Actual Plan Asset Allocations	40.10%	39.30%
Equity Securities [Member]
Defined Benefit Plan Disclosure [Line Items]
Total Defined Benefit Plan, Actual Plan Asset Allocations	59.80%	60.70%
Other [Member]
Defined Benefit Plan Disclosure [Line Items]
Total Defined Benefit Plan, Actual Plan Asset Allocations	0.10%	0.00%

Employee Benefits - Summary o_5

Employee Benefits - Summary of Estimated Future Benefit Payments (Detail) $ in Thousands	Sep. 30, 2018USD ($)
Compensation Related Costs [Abstract]
2,019	$ 366
2,020	3,106
2,021	2,345
2,022	659
2,023	852
2024-2028	$ 6,495

Regulatory Restrictions - Addit

Regulatory Restrictions - Additional Information (Detail) - USD ($)	Sep. 30, 2018	Sep. 30, 2017
Regulatory Capital Requirements [Abstract]
Reserve funds deposit	$ 17,348,000	$ 15,228,000

Regulatory Capital Requiremen_3

Regulatory Capital Requirements - Additional Information (Detail)	Sep. 30, 2018	Sep. 30, 2017	Dec. 31, 2014
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]
Common equity Tier 1 capital ratio	4.50%	4.50%
Tier 1 risk-based ratio	6.00%	6.00%	4.00%
Capital conservation buffer percentage	2.50%
Risk weight percentage	150.00%		100.00%
Total risk-based ratio	10.00%	10.00%
Common equity Tier 1 capital ratio	6.50%	6.50%
Minimum [Member]
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]
Tier 1 risk-based ratio	8.00%	8.00%
Total risk-based ratio	10.00%	10.00%
Common equity Tier 1 capital ratio	6.50%	6.50%
Tier 1 leverage capital ratio	5.00%	5.00%

Regulatory Capital Requiremen_4

Regulatory Capital Requirements - Bank's Actual Capital Ratios (Detail) - USD ($) $ in Thousands	Sep. 30, 2018	Sep. 30, 2017	Dec. 31, 2014
Banking And Thrift [Abstract]
Actual, Amount	$ 180,203	$ 170,325
For capital adequacy purposes, Amount	105,926	97,458
To be well capitalized, Amount	132,407	121,822
Actual, Amount	168,161	160,605
For capital adequacy purposes, Amount	79,444	73,093
To be well capitalized, Amount	105,926	97,458
Actual, Amount	168,161	160,605
For capital adequacy purposes, Amount	59,583	54,820
To be well capitalized, Amount	86,065	79,184
Actual, Amount	168,161	160,605
For capital adequacy purposes, Amount	72,456	69,878
To be well capitalized, Amount	$ 90,570	$ 87,247
Actual, Ratio	13.60%	14.00%
For capital adequacy purposes, Ratio	8.00%	8.00%
To be well capitalized, Ratio	10.00%	10.00%
Actual, Ratio	12.70%	13.20%
For capital adequacy purposes, Ratio	6.00%	6.00%	4.00%
To be well capitalized, Ratio	8.00%	8.00%
Actual, Ratio	12.70%	13.20%
For capital adequacy purposes, Ratio	4.50%	4.50%
To be well capitalized, Ratio	6.50%	6.50%
Actual, Ratio	9.20%	9.20%
For capital adequacy purposes, Ratio	4.00%	4.00%
To be well capitalized, Ratio	5.00%	5.00%

Fair Value Measurements - Sched

Fair Value Measurements - Schedule of Securities, Real Estate Owned and Impaired Loans Measured at Fair Value (Detail) - USD ($) $ in Thousands	Sep. 30, 2018	Sep. 30, 2017
Investment securities available for sale:
Total securities	$ 371,438	$ 390,452
Foreclosed real estate owned	1,141	1,424
Fair Value, Measurements, Recurring [Member]
Investment securities available for sale:
Total securities	371,438	390,452
Derivatives and hedging activities	2,452	1,215
Fair Value, Measurements, Recurring [Member] | Mortgage-Backed Securities [Member]
Investment securities available for sale:
Total securities	258,123	233,823
Fair Value, Measurements, Recurring [Member] | Obligations of States and Political Subdivisions [Member]
Investment securities available for sale:
Total securities	40,949	65,358
Fair Value, Measurements, Recurring [Member] | U.S. Government Agency Securities [Member]
Investment securities available for sale:
Total securities	5,558	18,671
Fair Value, Measurements, Recurring [Member] | Corporate Obligations [Member]
Investment securities available for sale:
Total securities	47,415	48,742
Fair Value, Measurements, Recurring [Member] | Other Debt Securities [Member]
Investment securities available for sale:
Total securities	19,373	23,833
Fair Value, Measurements, Recurring [Member] | Equity Securities-Financial Services [Member]
Investment securities available for sale:
Total securities	20	25
Fair Value, Measurements, Nonrecurring [Member]
Investment securities available for sale:
Foreclosed real estate owned	1,141	1,424
Impaired loans	11,557	15,231
Level I [Member] | Fair Value, Measurements, Recurring [Member]
Investment securities available for sale:
Total securities	20	25
Level I [Member] | Fair Value, Measurements, Recurring [Member] | Equity Securities-Financial Services [Member]
Investment securities available for sale:
Total securities	20	25
Level II [Member] | Fair Value, Measurements, Recurring [Member]
Investment securities available for sale:
Total securities	363,680	383,203
Derivatives and hedging activities	2,452	1,215
Level II [Member] | Fair Value, Measurements, Recurring [Member] | Mortgage-Backed Securities [Member]
Investment securities available for sale:
Total securities	258,123	233,823
Level II [Member] | Fair Value, Measurements, Recurring [Member] | Obligations of States and Political Subdivisions [Member]
Investment securities available for sale:
Total securities	40,949	65,358
Level II [Member] | Fair Value, Measurements, Recurring [Member] | U.S. Government Agency Securities [Member]
Investment securities available for sale:
Total securities	5,558	18,671
Level II [Member] | Fair Value, Measurements, Recurring [Member] | Corporate Obligations [Member]
Investment securities available for sale:
Total securities	39,677	41,518
Level II [Member] | Fair Value, Measurements, Recurring [Member] | Other Debt Securities [Member]
Investment securities available for sale:
Total securities	19,373	23,833
Level III [Member] | Fair Value, Measurements, Recurring [Member]
Investment securities available for sale:
Total securities	7,738	7,224
Level III [Member] | Fair Value, Measurements, Recurring [Member] | Corporate Obligations [Member]
Investment securities available for sale:
Total securities	7,738	7,224
Level III [Member] | Fair Value, Measurements, Nonrecurring [Member]
Investment securities available for sale:
Foreclosed real estate owned	1,141	1,424
Impaired loans	$ 11,557	$ 15,231

Fair Value Measurements - Sch_2

Fair Value Measurements - Schedule of Changes in Fair Value of Level III Investments (Detail) - USD ($)	12 Months Ended
	Sep. 30, 2018	Sep. 30, 2017
Fair Value Disclosures [Abstract]
Beginning balance	$ 7,224,000	$ 7,485,000
Purchases, sales, issuances, settlements, net	500,000
Total unrealized gain:
Included in other comprehensive income	14,000	4,000
Transfers into Level III		750,000
Transfers out of Level III		(1,015,000)
Ending balance	$ 7,738,000	$ 7,224,000

Fair Value Measurements - Addit

Fair Value Measurements - Additional Information (Detail) - USD ($)	12 Months Ended
	Sep. 30, 2017	Sep. 30, 2018
Fair Value Disclosures [Abstract]
Transfers into Level III	$ 750,000
Transfers out of Level III	1,015,000
Impaired loans, net fair value	15,600,000	$ 11,900,000
Impaired loans, valuation allowance	$ 345,000	$ 313,000

Fair Value Measurements - Summa

Fair Value Measurements - Summary of Additional Quantitative Information about Assets Measured at Fair Value on Nonrecurring Basis (Detail) $ in Thousands	Sep. 30, 2018USD ($)	Sep. 30, 2017USD ($)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total assets at fair value	$ 19,720	$ 20,363
Level III [Member] | Fair Value, Measurements, Nonrecurring [Member] | Impaired Loans [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total assets at fair value	$ 11,557	$ 15,231
Servicing Asset, Valuation Technique [Extensible List]	essa:AppraisalOfCollateralMember	essa:AppraisalOfCollateralMember
Servicing Asset, Measurement Input [Extensible List]	essa:AppraisalAdjustmentsMember	essa:AppraisalAdjustmentsMember
Level III [Member] | Fair Value, Measurements, Nonrecurring [Member] | Foreclosed Real Estate Owned [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total assets at fair value	$ 1,141	$ 1,424
Servicing Asset, Valuation Technique [Extensible List]	essa:AppraisalOfCollateralMember	essa:AppraisalOfCollateralMember
Servicing Asset, Measurement Input [Extensible List]	essa:AppraisalAdjustmentsMember	essa:AppraisalAdjustmentsMember
Level III [Member] | Fair Value, Measurements, Nonrecurring [Member] | Weighted-Average [Member] | Impaired Loans [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair value input appraisal adjustments	0.253	0.240
Level III [Member] | Fair Value, Measurements, Nonrecurring [Member] | Weighted-Average [Member] | Foreclosed Real Estate Owned [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair value input appraisal adjustments	0.237	0.221
Level III [Member] | Fair Value, Measurements, Nonrecurring [Member] | Minimum [Member] | Impaired Loans [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair value input appraisal adjustments	0	0
Level III [Member] | Fair Value, Measurements, Nonrecurring [Member] | Minimum [Member] | Foreclosed Real Estate Owned [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair value input appraisal adjustments	0.20	0.20
Level III [Member] | Fair Value, Measurements, Nonrecurring [Member] | Maximum [Member] | Impaired Loans [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair value input appraisal adjustments	0.35	0.57
Level III [Member] | Fair Value, Measurements, Nonrecurring [Member] | Maximum [Member] | Foreclosed Real Estate Owned [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair value input appraisal adjustments	0.46	0.46

Fair Value of Financial Instr_3

Fair Value of Financial Instruments - Schedule of Fair Values of the Company's Financial Instruments (Detail) - USD ($) $ in Thousands	Sep. 30, 2018	Sep. 30, 2017
Financial assets:
Investment and mortgage-backed securities available for sale	$ 371,438	$ 390,452
Loans receivable, net	11,900	15,600
Bank-owned life insurance	38,630	37,626
Financial liabilities:
Other borrowings	118,723	174,168
Advances by borrowers for taxes and insurance	6,826	5,163
Carrying Value [Member]
Financial assets:
Cash and cash equivalents	43,539	41,683
Certificates of deposit	500	500
Investment and mortgage-backed securities available for sale	371,438	390,452
Loans receivable, net	1,305,071	1,236,681
Accrued interest receivable	6,640	6,149
Regulatory stock	12,973	13,832
Mortgage servicing rights	206	232
Derivatives	2,452	1,215
Bank-owned life insurance	38,630	37,626
Financial liabilities:
Deposits	1,336,855	1,274,861
Short-term borrowings	179,773	137,446
Other borrowings	118,723	174,168
Advances by borrowers for taxes and insurance	6,826	5,163
Accrued interest payable	1,369	1,043
Estimated Fair Value [Member]
Financial assets:
Cash and cash equivalents	43,539	41,683
Certificates of deposit	505	505
Investment and mortgage-backed securities available for sale	371,438	390,452
Loans receivable, net	1,269,127	1,235,368
Accrued interest receivable	6,640	6,149
Regulatory stock	12,973	13,832
Mortgage servicing rights	340	310
Derivatives	2,452	1,215
Bank-owned life insurance	38,630	37,626
Financial liabilities:
Deposits	1,332,468	1,275,356
Short-term borrowings	179,773	137,446
Other borrowings	117,920	174,107
Advances by borrowers for taxes and insurance	6,826	5,163
Accrued interest payable	1,369	1,043
Estimated Fair Value [Member] | Level I [Member]
Financial assets:
Cash and cash equivalents	43,539	41,683
Investment and mortgage-backed securities available for sale	20	25
Accrued interest receivable	6,640	6,149
Regulatory stock	12,973	13,832
Bank-owned life insurance	38,630	37,626
Financial liabilities:
Deposits	811,607	763,964
Short-term borrowings	179,773	137,446
Advances by borrowers for taxes and insurance	6,826	5,163
Accrued interest payable	1,369	1,043
Estimated Fair Value [Member] | Level II [Member]
Financial assets:
Investment and mortgage-backed securities available for sale	363,680	383,203
Derivatives	2,452	1,215
Estimated Fair Value [Member] | Level III [Member]
Financial assets:
Certificates of deposit	505	505
Investment and mortgage-backed securities available for sale	7,738	7,224
Loans receivable, net	1,269,127	1,235,368
Mortgage servicing rights	340	310
Financial liabilities:
Deposits	520,861	511,392
Other borrowings	$ 117,920	$ 174,107

Accumulated Other Comprehensi_3

Accumulated Other Comprehensive Income (Loss) - Summary of Activity in Accumulated Other Comprehensive Income (Loss) (Detail) - USD ($)	12 Months Ended
	Sep. 30, 2018	Sep. 30, 2017
Accumulated Other Comprehensive Income Loss [Line Items]
Beginning Balance	$ 182,727,000	$ 176,344,000
Pension plan curtailment		4,579,000
Total other comprehensive (loss) income		1,078,000
Ending Balance	179,186,000	182,727,000
Defined Benefit Pension Plan [Member]
Accumulated Other Comprehensive Income Loss [Line Items]
Beginning Balance	(628,000)	(6,083,000)
Other comprehensive income (loss) before reclassifications and pension plan curtailment	275,000	2,284,000
Pension plan curtailment		3,022,000
Amounts reclassified from accumulated othercomprehensive income (loss)		149,000
Total other comprehensive (loss) income	275,000	5,455,000
Reclassification of certain income tax effects from other comprehensive (loss) income	(124,000)
Ending Balance	(477,000)	(628,000)
Unrealized Gains (Losses) on Securities Available for Sale [Member]
Accumulated Other Comprehensive Income Loss [Line Items]
Beginning Balance	(927,000)	3,952,000
Other comprehensive income (loss) before reclassifications and pension plan curtailment	(9,883,000)	(4,684,000)
Amounts reclassified from accumulated othercomprehensive income (loss)	(123,000)	(195,000)
Total other comprehensive (loss) income	(10,006,000)	(4,879,000)
Reclassification of certain income tax effects from other comprehensive (loss) income	(436,000)
Ending Balance	(11,369,000)	(927,000)
Derivatives [Member]
Accumulated Other Comprehensive Income Loss [Line Items]
Beginning Balance	801,000	299,000
Other comprehensive income (loss) before reclassifications and pension plan curtailment	1,269,000	505,000
Amounts reclassified from accumulated othercomprehensive income (loss)	(348,000)	(3,000)
Total other comprehensive (loss) income	921,000	502,000
Reclassification of certain income tax effects from other comprehensive (loss) income	214,000
Ending Balance	1,936,000	801,000
Accumulated Other Comprehensive Loss [Member]
Accumulated Other Comprehensive Income Loss [Line Items]
Beginning Balance	(754,000)	(1,832,000)
Other comprehensive income (loss) before reclassifications and pension plan curtailment	(8,339,000)	(1,895,000)
Pension plan curtailment		3,022,000
Amounts reclassified from accumulated othercomprehensive income (loss)	(471,000)	(49,000)
Total other comprehensive (loss) income	(8,810,000)	1,078,000
Reclassification of certain income tax effects from other comprehensive (loss) income	(346,000)
Ending Balance	$ (9,910,000)	$ (754,000)

Accumulated Other Comprehensi_4

Accumulated Other Comprehensive Income (Loss) - Summary of Activity in Accumulated Other Comprehensive Income (Loss) (Parenthetical) (Detail)	12 Months Ended
	Sep. 30, 2018	Sep. 30, 2017
Equity [Abstract]
Related income tax expense or benefit	24.30%	34.00%

Accumulated Other Comprehensi_5

Accumulated Other Comprehensive Income (Loss) - Summary of Reclassification Out of Accumulated Other Comprehensive Income (Loss) (Detail) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2017	Sep. 30, 2017	Jun. 30, 2017	Mar. 31, 2017	Dec. 31, 2016	Sep. 30, 2018	Sep. 30, 2017
Schedule of Available-for-sale Securities [Line Items]
Gain on sale of investments, net									$ 162	$ 295
Compensation and employee benefits										(226)
Interest expense	$ (4,592)	$ (4,156)	$ (3,912)	$ (3,608)	$ (3,458)	$ (3,248)	$ (3,075)	$ (3,018)	(16,268)	(12,799)
Income taxes	$ (542)	$ (500)	$ (529)	$ (4,093)	$ (540)	$ (448)	$ (203)	$ (400)	(5,664)	(1,591)
Unrealized Gains (Losses) on Securities Available for Sale [Member]
Schedule of Available-for-sale Securities [Line Items]
Net of tax									123	195
Defined Benefit Pension Plan [Member]
Schedule of Available-for-sale Securities [Line Items]
Net of tax										(149)
Derivatives [Member]
Schedule of Available-for-sale Securities [Line Items]
Net of tax									348	3
Reclassification Out of Accumulated Other Comprehensive Income (Loss) [Member]
Schedule of Available-for-sale Securities [Line Items]
Net of tax									471	49
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 investments, net									162	295
Income taxes									(39)	(100)
Net of tax									123	195
Reclassification Out of Accumulated Other Comprehensive Income (Loss) [Member] | Defined Benefit Pension Plan [Member]
Schedule of Available-for-sale Securities [Line Items]
Compensation and employee benefits										(226)
Income taxes										77
Net of tax										(149)
Reclassification Out of Accumulated Other Comprehensive Income (Loss) [Member] | Derivatives [Member]
Schedule of Available-for-sale Securities [Line Items]
Interest expense									459	5
Income taxes									(111)	(2)
Net of tax									$ 348	$ 3

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] - Interest Rate Products [Member] - Other Assets [Member] - USD ($)	Sep. 30, 2018	Sep. 30, 2017
Derivatives Fair Value [Line Items]
Asset Derivatives, Notional Amount	$ 100,000,000	$ 75,000,000
Fair Values of Derivative Instruments	$ 2,595,000	$ 1,215,000

Derivatives and Hedging Activ_3

Derivatives and Hedging Activities - Additional Information (Detail)	3 Months Ended								12 Months Ended
	Sep. 30, 2018USD ($)Contract	Jun. 30, 2018USD ($)	Mar. 31, 2018USD ($)	Dec. 31, 2017USD ($)	Sep. 30, 2017USD ($)Contract	Jun. 30, 2017USD ($)	Mar. 31, 2017USD ($)	Dec. 31, 2016USD ($)	Sep. 30, 2019USD ($)	Sep. 30, 2018USD ($)Contract	Sep. 30, 2017USD ($)Contract	Sep. 20, 2018USD ($)	Sep. 20, 2017USD ($)
Derivative Instruments And Hedging Activities Disclosures [Line Items]
Interest income	$ 16,562,000	$ 16,718,000	$ 15,847,000	$ 15,376,000	$ 14,881,000	$ 14,408,000	$ 14,379,000	$ 14,650,000		$ 64,503,000	$ 58,318,000
Increase (decrease) in accrued interest payable										326,000	(3,000)
Derivative liabilities												$ 0	$ 0
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 income										$ 459,000	$ 13,000
Designated as Hedging Instrument [Member] | Cash Flow Hedges of Interest Rate Risk [Member] | Scenario, Forecast [Member] | Reclassification Out of Accumulated Other Comprehensive Income (Loss) [Member]
Derivative Instruments And Hedging Activities Disclosures [Line Items]
Increase (decrease) in accrued interest payable									$ (1,100,000)
Designated as Hedging Instrument [Member] | Cash Flow Hedges of Interest Rate Risk [Member] | Interest Rate Swaps [Member] | Variable Rate [Member] | FHLB Advances [Member]
Derivative Instruments And Hedging Activities Disclosures [Line Items]
Derivative, number of instruments | Contract	6				5					6	5
Derivative, notional principal amount	$ 100,000,000				$ 75,000,000					$ 100,000,000	$ 75,000,000

Derivatives and Hedging Activ_4

Derivatives and Hedging Activities - Schedule of Effect of Cash Flow Hedge Accounting on Accumulated Other Comprehensive Income (Detail) - USD ($) $ in Thousands	12 Months Ended
	Sep. 30, 2018	Sep. 30, 2017
Derivative Instruments Gain Loss [Line Items]
Amount of Gain Recognized in OCI on Derivative	$ 1,696	$ 921
Designated as Hedging Instrument [Member] | Cash Flow Hedges of Interest Rate Risk [Member]
Derivative Instruments Gain Loss [Line Items]
Amount of Gain Recognized in OCI on Derivative	1,696	930
Amount of Gain Reclassified from Accumulated OCI into Income	459	13
Designated as Hedging Instrument [Member] | Cash Flow Hedges of Interest Rate Risk [Member] | Interest Expense [Member]
Derivative Instruments Gain Loss [Line Items]
Amount of Gain Reclassified from Accumulated OCI into Income	459	13
Designated as Hedging Instrument [Member] | Interest Rate Products [Member] | Cash Flow Hedges of Interest Rate Risk [Member]
Derivative Instruments Gain Loss [Line Items]
Amount of Gain Recognized in OCI on Derivative	$ 1,696	$ 930

Derivatives and Hedging Activ_5

Derivatives and Hedging Activities - Schedule of Effect of Derivative Financial Instruments on Income Statement (Detail) - USD ($) $ in Thousands	12 Months Ended
	Sep. 30, 2018	Sep. 30, 2017
Derivative Instruments Gain Loss [Line Items]
Total amounts of income and expense line items presented in the statement of financial performance in which the effects of fair value or cash flow hedges are recorded	$ 1,696	$ 921
Designated as Hedging Instrument [Member] | Cash Flow Hedges of Interest Rate Risk [Member]
Derivative Instruments Gain Loss [Line Items]
Total amounts of income and expense line items presented in the statement of financial performance in which the effects of fair value or cash flow hedges are recorded	1,696	930
Amount of gain reclassified from accumulated other comprehensive income into income	459	13
Designated as Hedging Instrument [Member] | Cash Flow Hedges of Interest Rate Risk [Member] | Interest Rate Products [Member]
Derivative Instruments Gain Loss [Line Items]
Total amounts of income and expense line items presented in the statement of financial performance in which the effects of fair value or cash flow hedges are recorded	1,696	930
Interest Income (Expense) [Member] | Designated as Hedging Instrument [Member] | Cash Flow Hedges of Interest Rate Risk [Member] | Interest Rate Products [Member]
Derivative Instruments Gain Loss [Line Items]
Total amounts of income and expense line items presented in the statement of financial performance in which the effects of fair value or cash flow hedges are recorded	459	13
Amount of gain reclassified from accumulated other comprehensive income into income	459	13
Other Income (Expense) [Member] | Designated as Hedging Instrument [Member] | Cash Flow Hedges of Interest Rate Risk [Member] | Interest Rate Products [Member]
Derivative Instruments Gain Loss [Line Items]
Total amounts of income and expense line items presented in the statement of financial performance in which the effects of fair value or cash flow hedges are recorded	0	0
Amount of gain reclassified from accumulated other comprehensive income into income	$ 0	$ 0

Derivatives and Hedging Activ_6

Derivatives and Hedging Activities - Schedule of Gross Presentation, Effects of Offsetting and Net Presentation of Derivatives (Detail) - USD ($) $ in Thousands	Sep. 30, 2018	Sep. 30, 2017
Derivative Instruments And Hedging Activities Disclosure [Abstract]
Derivative Assets, Gross Amounts of Recognized Assets	$ 2,595	$ 1,240
Derivative Assets, Net Amounts of Assets presented in the Statement of Financial Position	2,595	1,240
Derivative Assets, Cash Collateral Received	2,540	970
Derivative Assets, Net Amount	$ 55	$ 270

Parent Company - Condensed Bala

Parent Company - Condensed Balance Sheet (Detail) - USD ($) $ in Thousands	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2016
ASSETS
Cash and due from banks	$ 39,197	$ 36,008
Investment securities available for sale	371,438	390,452
Premises and equipment, net	14,601	16,234
Other assets	22,280	20,719
TOTAL ASSETS	1,833,790	1,785,218
LIABILITIES AND STOCKHOLDERS’ EQUITY
Other liabilities	12,427	10,853
Stockholders’ equity	179,186	182,727	$ 176,344
TOTAL LIABILITIES AND STOCKHOLDERS’ EQUITY	1,833,790	1,785,218
Parent Company [Member]
ASSETS
Cash and due from banks	3,713	5,034
Investment securities available for sale	20	25
Investment in subsidiary	173,431	175,127
Premises and equipment, net	431	1,093
Other assets	1,705	1,577
TOTAL ASSETS	179,300	182,856
LIABILITIES AND STOCKHOLDERS’ EQUITY
Other liabilities	114	129
Stockholders’ equity	179,186	182,727
TOTAL LIABILITIES AND STOCKHOLDERS’ EQUITY	$ 179,300	$ 182,856

Parent Company - Condensed Stat

Parent Company - Condensed Statement of Income (Detail) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2017	Sep. 30, 2017	Jun. 30, 2017	Mar. 31, 2017	Dec. 31, 2016	Sep. 30, 2018	Sep. 30, 2017
INCOME
Interest income	$ 11,970	$ 12,562	$ 11,935	$ 11,768	$ 11,423	$ 11,160	$ 11,304	$ 11,632	$ 48,235	$ 45,519
EXPENSES
Professional fees									2,368	2,886
Other									3,937	3,723
Total noninterest expense	9,420	10,163	9,988	10,282	10,212	10,320	10,504	10,402	39,853	41,438
Loss before income tax expense	3,627	3,321	2,792	2,455	2,549	2,210	1,834	2,337
Income tax benefit	542	500	529	4,093	540	448	203	400	5,664	1,591
NET INCOME	$ 3,085	$ 2,821	$ 2,263	$ (1,638)	$ 2,009	$ 1,762	$ 1,631	$ 1,937	6,531	7,339
COMPREHENSIVE (LOSS)INCOME									(2,279)	8,417
Parent Company [Member]
INCOME
Interest income									517	426
Total income									517	426
EXPENSES
Professional fees									431	455
Other									388	51
Total noninterest expense									819	506
Loss before income tax expense									(302)	(80)
Income tax benefit									(73)	(27)
Loss before equity in undistributed net earnings of subsidiary									(229)	(53)
Equity in undistributed net earnings of subsidiary									6,760	7,392
NET INCOME									6,531	7,339
COMPREHENSIVE (LOSS)INCOME									$ (2,279)	$ 8,417

Parent Company - Condensed St_2

Parent Company - Condensed Statement of Cash Flows (Detail) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2017	Sep. 30, 2017	Jun. 30, 2017	Mar. 31, 2017	Dec. 31, 2016	Sep. 30, 2018	Sep. 30, 2017
OPERATING ACTIVITIES
Net income	$ 3,085	$ 2,821	$ 2,263	$ (1,638)	$ 2,009	$ 1,762	$ 1,631	$ 1,937	$ 6,531	$ 7,339
Adjustments to reconcile net income to net cash provided by operating activities:
Provision for depreciation									1,177	1,305
(Increase) decrease in accrued interest receivable									(491)	(380)
Deferred federal income taxes									4,572	754
Loss on disposal of fixed assets									562
Other, net									2,592	2,480
FINANCING ACTIVITIES
Proceeds from the exercise of stock options									1,575	779
Dividends on common stock									(3,912)	(3,830)
CASH AT BEGINNING OF YEAR				41,683					41,683
CASH AT END OF YEAR	43,539				41,683				43,539	41,683
Parent Company [Member]
OPERATING ACTIVITIES
Net income									6,531	7,339
Adjustments to reconcile net income to net cash provided by operating activities:
Equity in undistributed net earnings of subsidiary									(6,760)	(7,391)
Provision for depreciation									23	25
(Increase) decrease in accrued income taxes									73	(34)
(Increase) decrease in accrued interest receivable									(56)	1
Deferred federal income taxes									2	(5)
Loss on disposal of fixed assets									340
Other, net									564	974
Net cash provided by operating activities									717	909
INVESTING ACTIVITIES
Sale of premises, equipment and software									299
Net cash used for investing activities									299
FINANCING ACTIVITIES
Proceeds from the exercise of stock options									1,575	779
Dividends on common stock									(3,912)	(3,830)
Net cash provided by (used for) financing activities									(2,337)	(3,051)
Decrease in cash									(1,321)	(2,142)
CASH AT BEGINNING OF YEAR				$ 5,034				$ 7,176	5,034	7,176
CASH AT END OF YEAR	$ 3,713				$ 5,034				$ 3,713	$ 5,034

Selected Quarterly Data (Unau_3

Selected Quarterly Data (Unaudited) - Summary of Selected Quarterly Data (Detail) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended								12 Months Ended
	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2017	Sep. 30, 2017	Jun. 30, 2017	Mar. 31, 2017	Dec. 31, 2016	Sep. 30, 2018	Sep. 30, 2017
Quarterly Financial Information Disclosure [Abstract]
Total interest income	$ 16,562	$ 16,718	$ 15,847	$ 15,376	$ 14,881	$ 14,408	$ 14,379	$ 14,650	$ 64,503	$ 58,318
Total interest expense	4,592	4,156	3,912	3,608	3,458	3,248	3,075	3,018	16,268	12,799
NET INTEREST INCOME	11,970	12,562	11,935	11,768	11,423	11,160	11,304	11,632	48,235	45,519
Provision for loan losses	925	975	1,100	1,000	1,100	750	750	750	4,000	3,350
NET INTEREST INCOME AFTER PROVISION FOR LOAN LOSSES	11,045	11,587	10,835	10,768	10,323	10,410	10,554	10,882	44,235	42,169
Total noninterest income	2,002	1,897	1,945	1,969	2,438	2,120	1,784	1,857	7,813	8,199
Total noninterest expense	9,420	10,163	9,988	10,282	10,212	10,320	10,504	10,402	39,853	41,438
Loss before income tax expense	3,627	3,321	2,792	2,455	2,549	2,210	1,834	2,337
Income taxes expense (benefit)	542	500	529	4,093	540	448	203	400	5,664	1,591
NET INCOME	$ 3,085	$ 2,821	$ 2,263	$ (1,638)	$ 2,009	$ 1,762	$ 1,631	$ 1,937	$ 6,531	$ 7,339
Net income
Basic	$ 0.28	$ 0.26	$ 0.21	$ (0.15)	$ 0.19	$ 0.16	$ 0.15	$ 0.18	$ 0.60	$ 0.69
Diluted	$ 0.28	$ 0.26	$ 0.21	$ (0.15)	$ 0.19	$ 0.16	$ 0.15	$ 0.18	$ 0.60	$ 0.69
Average shares outstanding
Basic	10,970,947	10,911,469	10,796,353	10,717,138	10,704,554	10,678,856	10,592,997	10,475,032	10,833,844	10,601,733
Diluted	10,970,947	10,922,860	10,822,109	10,717,138	10,766,159	10,743,008	10,691,960	10,604,072	10,833,844	10,663,457