ESSA Bancorp (ESSA) 10-Q 9 May 19 2019 Q2 Quarterly report Financial data

Document and Entity Information

Document and Entity Information - shares	6 Months Ended
	Mar. 31, 2019	May 03, 2019
Document And Entity Information [Abstract]
Document Type	10-Q
Amendment Flag	false
Document Period End Date	Mar. 31, 2019
Document Fiscal Year Focus	2019
Document Fiscal Period Focus	Q2
Trading Symbol	ESSA
Entity Registrant Name	ESSA Bancorp, Inc.
Entity Central Index Key	0001382230
Current Fiscal Year End Date	--09-30
Entity Filer Category	Accelerated Filer
Entity Small Business	true
Entity Emerging Growth Company	false
Entity Common Stock, Shares Outstanding		11,408,935

Consolidated Balance Sheet (Una

Consolidated Balance Sheet (Unaudited) - USD ($) $ in Thousands	Mar. 31, 2019	Sep. 30, 2018
ASSETS
Cash and due from banks	$ 34,535	$ 39,197
Interest-bearing deposits with other institutions	6,624	4,342
Total cash and cash equivalents	41,159	43,539
Certificates of deposit	250	500
Investment securities available for sale, at fair value	348,617	371,438
Loans receivable (net of allowance for loan losses of $12,389 and $11,688)	1,335,197	1,305,071
Regulatory stock, at cost	14,633	12,973
Premises and equipment, net	14,323	14,601
Bank-owned life insurance	39,114	38,630
Foreclosed real estate	665	1,141
Intangible assets, net	1,213	1,375
Goodwill	13,801	13,801
Deferred income taxes	5,665	8,441
Other assets	21,177	22,280
TOTAL ASSETS	1,835,814	1,833,790
LIABILITIES
Deposits	1,293,883	1,336,855
Short-term borrowings	198,293	179,773
Other borrowings	139,673	118,723
Advances by borrowers for taxes and insurance	10,353	6,826
Other liabilities	9,975	12,427
TOTAL LIABILITIES	1,652,177	1,654,604
STOCKHOLDERS’ EQUITY
Preferred Stock ($0.01 par value; 10,000,000 shares authorized, none issued)
Common stock ($0.01 par value; 40,000,000 shares authorized, 18,133,095 issued; 11,408,935 and 11,782,718 outstanding at March 31, 2019 and September 30, 2018, respectively)	181	181
Additional paid in capital	180,857	180,765
Unallocated common stock held by the Employee Stock Ownership Plan (ESOP)	(8,029)	(8,255)
Retained earnings	97,821	94,112
Treasury stock, at cost; 6,724,160 and 6,350,377 shares outstanding at March 31, 2019 and September 30, 2018, respectively	(83,864)	(77,707)
Accumulated other comprehensive loss	(3,329)	(9,910)
TOTAL STOCKHOLDERS’ EQUITY	183,637	179,186
TOTAL LIABILITIES AND STOCKHOLDERS’ EQUITY	$ 1,835,814	$ 1,833,790

Consolidated Balance Sheet (U_2

Consolidated Balance Sheet (Unaudited) (Parenthetical) - USD ($) $ in Thousands	Mar. 31, 2019	Sep. 30, 2018
Statement Of Financial Position [Abstract]
Allowance for loan losses	$ 12,389	$ 11,688
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	11,408,935	11,782,718
Treasury stock, shares outstanding	6,724,160	6,350,377

Consolidated Statement of Opera

Consolidated Statement of Operations (Unaudited) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Mar. 31, 2019	Mar. 31, 2018	Mar. 31, 2019	Mar. 31, 2018
INTEREST INCOME
Loans receivable, including fees	$ 14,042	$ 12,953	$ 27,949	$ 25,736
Investment securities:
Taxable	2,530	2,186	5,012	4,244
Exempt from federal income tax	94	285	230	573
Other investment income	462	423	806	670
Total interest income	17,128	15,847	33,997	31,223
INTEREST EXPENSE
Deposits	3,555	2,359	6,943	4,736
Short-term borrowings	1,172	951	2,249	1,535
Other borrowings	669	602	1,188	1,249
Total interest expense	5,396	3,912	10,380	7,520
NET INTEREST INCOME	11,732	11,935	23,617	23,703
Provision for loan losses	600	1,100	1,476	2,100
NET INTEREST INCOME AFTER PROVISION FOR LOAN LOSSES	11,132	10,835	22,141	21,603
NONINTEREST INCOME
Service fees on deposit accounts	784	821	1,647	1,704
Services charges and fees on loans	276	299	606	668
Realized and unrealized gains on equity securities	3		1
Trust and investment fees	235	237	474	477
Gain on sale of investments securities available for sale	39	75	43	75
Earnings on Bank-owned life insurance	240	249	484	504
Insurance commissions	194	204	395	375
Other	297	60	544	111
Total noninterest income	2,068	1,945	4,194	3,914
NONINTEREST EXPENSE
Compensation and employee benefits	6,035	6,024	12,159	12,156
Occupancy and equipment	1,112	1,186	2,138	2,371
Professional fees	646	626	1,170	1,192
Data processing	930	888	1,833	1,817
Advertising	204	201	359	359
Federal Deposit Insurance Corporation (FDIC) premiums	182	256	369	445
Loss (gain) on foreclosed real estate	11	32	(104)	(4)
Amortization of intangible assets	77	135	161	279
Other	514	640	1,278	1,655
Total noninterest expense	9,711	9,988	19,363	20,270
Income before income taxes	3,489	2,792	6,972	5,247
Income taxes	630	529	1,104	4,622
NET INCOME	$ 2,859	$ 2,263	$ 5,868	$ 625
Earnings per share
Basic	$ 0.26	$ 0.21	$ 0.54	$ 0.06
Diluted	0.26	0.21	0.54	0.06
Dividends per share	$ 0.10	$ 0.09	$ 0.20	$ 0.18

Consolidated Statement of Compr

Consolidated Statement of Comprehensive Income (Loss) (Unaudited) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Mar. 31, 2019	Mar. 31, 2018	Mar. 31, 2019	Mar. 31, 2018
Statement Of Income And Comprehensive Income [Abstract]
Net income	$ 2,859	$ 2,263	$ 5,868	$ 625
Investment securities available for sale:
Unrealized holding gain (loss)	4,866	(6,452)	9,918	(8,403)
Tax effect	(1,022)	1,352	(2,083)	2,015
Reclassification of gains recognized in net income	(39)	(75)	(43)	(75)
Tax effect	8	18	9	18
Net of tax amount	3,813	(5,157)	7,801	(6,445)
Derivative and hedging activities adjustments:
Changes in unrealized holding (losses) gains on derivatives included in net income	(336)	738	(1,061)	1,195
Tax effect	71	(151)	223	(307)
Reclassification adjustment for gains on derivatives included in net income	(271)	(76)	(488)	(99)
Tax effect	56	13	102	21
Net of tax amount	(480)	524	(1,224)	810
Total other comprehensive income (loss)	3,333	(4,633)	6,577	(5,635)
Comprehensive income (loss)	$ 6,192	$ (2,370)	$ 12,445	$ (5,010)

Consolidated Statement of Chang

Consolidated Statement of Changes in Stockholders' Equity (Unaudited) - USD ($) $ in Thousands	Total	Common Stock [Member]	Additional Paid-In Capital [Member]	Unallocated Common Stock Held by the ESOP [Member]	Retained Earnings [Member]	Treasury Stock [Member]	Accumulated Other Comprehensive Loss [Member]
Beginning Balance at Sep. 30, 2017	$ 182,727	$ 181	$ 180,764	$ (8,720)	$ 91,147	$ (79,891)	$ (754)
Beginning Balance, Shares at Sep. 30, 2017		11,596,263
Net income	625				625
Other comprehensive income (loss)	(5,635)						(5,635)
Reclassification of certain income tax effects from accumulated other comprehensive income	(346)				346		(346)
Cash dividends declared ($0.18 for 3 and 6 month ended Mar. 31, 2018 and $0.20 for 3 and 6 months ended Mar. 31, 2019 per share)	(1,939)				(1,939)
Stock based compensation	184		184
Allocation of ESOP stock	362		130	232
Allocation of treasury shares to incentive plan			(281)			281
Allocation of treasury shares to incentive plan, Shares		22,994
Stock options exercised	1,054		(331)			1,385
Stock options exercised, Shares		112,965
Ending Balance at Mar. 31, 2018	177,378	$ 181	180,466	(8,488)	90,179	(78,225)	(6,735)
Ending Balance, Shares at Mar. 31, 2018		11,732,222
Beginning Balance at Dec. 31, 2017	179,479	$ 181	180,532	(8,604)	88,546	(79,420)	(1,756)
Beginning Balance, Shares at Dec. 31, 2017		11,634,790
Net income	2,263				2,263
Other comprehensive income (loss)	(4,633)						(4,633)
Reclassification of certain income tax effects from accumulated other comprehensive income	(346)				346		(346)
Cash dividends declared ($0.18 for 3 and 6 month ended Mar. 31, 2018 and $0.20 for 3 and 6 months ended Mar. 31, 2019 per share)	(976)				(976)
Stock based compensation	104		104
Allocation of ESOP stock	179		63	116
Stock options exercised	962		(233)			1,195
Stock options exercised, Shares		97,432
Ending Balance at Mar. 31, 2018	177,378	$ 181	180,466	(8,488)	90,179	(78,225)	(6,735)
Ending Balance, Shares at Mar. 31, 2018		11,732,222
Beginning Balance at Sep. 30, 2018	$ 179,186	$ 181	180,765	(8,255)	94,112	(77,707)	(9,910)
Beginning Balance, Shares at Sep. 30, 2018	11,782,718	11,782,718
Net income	$ 5,868				5,868
Other comprehensive income (loss)	6,577						6,577
Reclassification of certain income tax effects from accumulated other comprehensive income	4
Cash dividends declared ($0.18 for 3 and 6 month ended Mar. 31, 2018 and $0.20 for 3 and 6 months ended Mar. 31, 2019 per share)	(2,155)				(2,155)
Stock based compensation	350		350
Allocation of ESOP stock	352		126	226
Allocation of treasury shares to incentive plan			(384)			384
Allocation of treasury shares to incentive plan, Shares		31,601
Reclassification of equity investment securities					(4)		4
Purchase of common stock	(6,541)					(6,541)
Purchase of common stock, Shares		(405,384)
Ending Balance at Mar. 31, 2019	$ 183,637	$ 181	180,857	(8,029)	97,821	(83,864)	(3,329)
Ending Balance, Shares at Mar. 31, 2019	11,408,935	11,408,935
Beginning Balance at Dec. 31, 2018	$ 184,775	$ 181	180,631	(8,142)	96,026	(77,259)	(6,662)
Beginning Balance, Shares at Dec. 31, 2018		11,819,814
Net income	2,859				2,859
Other comprehensive income (loss)	3,333						3,333
Cash dividends declared ($0.18 for 3 and 6 month ended Mar. 31, 2018 and $0.20 for 3 and 6 months ended Mar. 31, 2019 per share)	(1,064)				(1,064)
Stock based compensation	98		98
Allocation of ESOP stock	177		64	113
Reclassification of equity investment securities			64			(64)
Reclassification of equity investment securities, Shares		(5,495)
Purchase of common stock	(6,541)					(6,541)
Purchase of common stock, Shares		(405,384)
Ending Balance at Mar. 31, 2019	$ 183,637	$ 181	$ 180,857	$ (8,029)	$ 97,821	$ (83,864)	$ (3,329)
Ending Balance, Shares at Mar. 31, 2019	11,408,935	11,408,935

Consolidated Statement of Cha_2

Consolidated Statement of Changes in Stockholders' Equity (Unaudited) (Parenthetical) - $ / shares	3 Months Ended		6 Months Ended
	Mar. 31, 2019	Mar. 31, 2018	Mar. 31, 2019	Mar. 31, 2018
Cash dividends declared, per share	$ 0.10	$ 0.09	$ 0.20	$ 0.18
Retained Earnings [Member]
Cash dividends declared, per share	$ 0.10	$ 0.09	$ 0.20	$ 0.18

Consolidated Statement of Cash

Consolidated Statement of Cash Flows (Unaudited) - USD ($) $ in Thousands	6 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
OPERATING ACTIVITIES
Net income	$ 5,868	$ 625
Adjustments to reconcile net income to net cash provided by operating activities:
Provision for loan losses	1,476	2,100
Provision for depreciation and amortization	561	599
Amortization and accretion of discounts and premiums, net	1,567	2,227
Net gain on sale of investment securities	(43)	(75)
Net loss recognized on equity securities financial services	(1)
Compensation expense on ESOP	352	362
Stock based compensation	350	184
Increase in accrued interest receivable	(398)	(130)
Increase in accrued interest payable	504	34
Earnings on bank-owned life insurance	(484)	(504)
Deferred federal income taxes	1,027	3,525
Decrease in accrued pension liability	(239)	(255)
Gain on foreclosed real estate, net	(104)	(4)
Amortization of identifiable assets	161	279
Other, net	(2,712)	1,910
Net cash provided by operating activities	7,885	10,877
INVESTING ACTIVITIES
Certificate of deposit maturities	250
Investment securities available for sale:
Proceeds from sale of investment securities	30,455	22,074
Proceeds from principal repayments and maturities	22,259	32,270
Purchases	(20,729)	(50,617)
Increase in loans receivable, net	(32,462)	(58,649)
Redemption of regulatory stock	9,953	9,034
Purchase of regulatory stock	(11,613)	(12,436)
Proceeds from sale of foreclosed real estate	629	837
Purchase of premises, equipment and software	(336)	(66)
Net cash used for investing activities	(1,594)	(57,553)
FINANCING ACTIVITIES
Decrease in deposits, net	(42,972)	(35,508)
Net increase in short-term borrowings	18,520	103,899
Proceeds from other borrowings	75,700	25,100
Repayment of other borrowings	(54,750)	(59,834)
Increase in advances by borrowers for taxes and insurance	3,527	7,025
Purchase of treasury shares	(6,541)
Exercising of stock options		1,054
Dividends on common stock	(2,155)	(1,939)
Net cash (used for) provided by financing activities	(8,671)	39,797
Decrease in cash and cash equivalents	(2,380)	(6,879)
CASH AND CASH EQUIVALENTS AT BEGINNING OF YEAR	43,539	41,683
CASH AND CASH EQUIVALENTS AT END OF YEAR	41,159	34,804
Cash Paid:
Interest	9,876	7,486
Income taxes		(2)
Noncash items:
Transfers from loans to foreclosed real estate	49	688
Unrealized holding gains (losses)	$ 9,882	$ (8,478)

Nature of Operations and Basis

Nature of Operations and Basis of Presentation	6 Months Ended
	Mar. 31, 2019
Organization Consolidation And Presentation Of Financial Statements [Abstract]
Nature of Operations and Basis of Presentation	1. Nature of Operations and Basis of Presentation The consolidated financial statements include the accounts of ESSA Bancorp, Inc. (the “Company”), its wholly owned subsidiary, ESSA Bank & Trust (the “Bank”), and the Bank’s wholly owned subsidiaries, ESSACOR Inc.; Pocono Investments Company; ESSA Advisory Services, LLC; Integrated Financial Corporation; and Integrated Abstract Incorporated, a wholly owned subsidiary of Integrated Financial Corporation. The primary purpose of the Company is to act as a holding company for the Bank. 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, Delaware, Chester, Montgomery, Lackawanna, and Luzerne 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 “FDIC”). The investment in the Bank on the parent company’s financial statements is carried at the parent company’s equity in the underlying net assets. ESSACOR, Inc. is a Pennsylvania corporation that has been used to purchase properties at tax sales that represent collateral for delinquent loans of the Bank and is currently inactive. Pocono Investment Company is a Delaware corporation formed as an investment company subsidiary to hold and manage certain investments, including certain intellectual property. ESSA Advisory Services, LLC is a Pennsylvania limited liability company owned 100 percent by ESSA Bank & Trust. ESSA Advisory Services, LLC is a full-service insurance benefits consulting company offering group services such as health insurance, life insurance, short-term and long-term disability, dental, vision, and 401(k) retirement planning as well as individual health products. Integrated Financial Corporation is a Pennsylvania corporation that provided investment advisory services to the general public and is currently inactive. Integrated Abstract Incorporated is a Pennsylvania corporation that provided title insurance services and is currently inactive. All significant intercompany accounts and transactions have been eliminated in consolidation. The unaudited consolidated financial statements reflect all adjustments, which in the opinion of management, are necessary for a fair presentation of the results of the interim periods and are of a normal and recurring nature. Operating results for the three and six month periods ended March 31, 2019 are not necessarily indicative of the results that may be expected for the year ending September 30, 2019.

Earnings per Share

Earnings per Share	6 Months Ended
	Mar. 31, 2019
Earnings Per Share [Abstract]
Earnings per Share	2. Earnings per Share The following table sets forth the composition of the weighted-average common shares (denominator) used in the basic and diluted earnings per share computation for the three and six months periods ended March 31, 2019 and 2018. Three Months Ended Six Months Ended March 31, March 31, March 31, March 31, 2019 2018 2019 2018 Weighted-average common shares outstanding 18,133,095 18,133,095 18,133,095 18,133,095 Average treasury stock shares (6,458,020 ) (6,459,392 ) (6,386,412 ) (6,490,961 ) Average unearned ESOP shares (797,738 ) (843,010 ) (803,457 ) (848,729 ) Average unearned non-vested shares (51,711 ) (34,340 ) (52,039 ) (44,318 ) Weighted average common shares and common stock equivalents used to calculate basic earnings per share 10,825,626 10,796,353 10,891,187 10,749,087 Additional common stock equivalents (non-vested stock) used to calculate diluted earnings per share — 347 — 143 Additional common stock equivalents (stock options) used to calculate diluted earnings per share — 25,409 31,149 Weighted average common shares and common stock equivalents used to calculate diluted earnings per share 10,825,626 10,822,109 10,891,187 10,780,379 At March 31, 2019 there were 45,214 shares of nonvested stock outstanding at an average weighted price of $16.01 per share that were not included in the computation of diluted earnings per share because to do so would have been anti-dilutive. At March 31, 2018 there were 53,313 shares of nonvested stock outstanding at an average weighted price of $15.24 per share that were not included in the computation of diluted earnings per share because to do so would have been anti-dilutive.

Use of Estimates in the Prepara

Use of Estimates in the Preparation of Financial Statements	6 Months Ended
	Mar. 31, 2019
Text Block [Abstract]
Use of Estimates in the Preparation of Financial Statements	3. Use of Estimates in the Preparation of Financial Statements The accounting principles followed by the Company and its subsidiaries and the methods of applying these principles conform to U.S. generally accepted accounting principles (“GAAP”) and to general practice within the banking industry. In preparing the consolidated financial statements, management is required to make estimates and assumptions that affect the reported amounts of assets and liabilities as of the Consolidated Balance Sheet date and related revenues and expenses for the period. Actual results could differ from those estimates.

Accounting Pronouncements

Accounting Pronouncements	6 Months Ended
	Mar. 31, 2019
Accounting Changes And Error Corrections [Abstract]
Accounting Pronouncements	4. Accounting Pronouncements Adoption of New Standards In May 2014, the FASB issued ASU No. 2014-09, “Revenue from contracts with customers.” In January 2016, the FASB issued ASU No. 2016-01, “Recognition and Measurement of Financial Assets and Financial Liabilities.” Fair Value Investment Securities In March 2017, the FASB issued ASU 2017-07, Compensation—Retirement Benefits (Topic 715) Recent Accounting Pronouncements In February 2016, the FASB issued ASU 2016-02, Leases (Topic 842) In June 2016, the FASB issued ASU 2016-13, Financial Instruments - Credit Losses: Measurement of Credit Losses on Financial Instruments In Simplifying the Test for Goodwill Impairment In March 2017, the FASB issued ASU 2017-08, Receivables – Nonrefundable Fees and Other Costs (Subtopic 310-20). 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 Leases (Topic 842) In June 2018, the FASB issued ASU 2018-07, Compensation – Stock Compensation (Topic 718) In July 2018, the FASB issued ASU 2018-09, Codification Improvements 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 Compensation – Retirement Benefits (Topic 715-20). In October 2018, the FASB issued ASU 2018-16 , Derivatives and Hedging (Topic 815) In November 2018, the FASB issued ASU 2018-19, Codification Improvements to Topic 326, Financial Instruments - Credit Losses, Leases In December 2018, the FASB issued ASU 2018-20, Leases (Topic 842), Leases In March 2019, the FASB issued ASU 2019-01, Leases (Topic 842): Codification Improvements, 1) determining the fair value of the underlying asset by the lessor that are not manufacturers or dealers (generally financial institutions and captive finance companies), and 2) lessors that are depository and lending institutions should classify principal and payments received under sales-type and direct financing leases In April 2019, the FASB issued ASU 2019-04, Codification Improvements to Topic 326, Financial Instruments – Credit Losses, Topic 815, Derivatives and Hedging, and Topic 825, Financial Instruments, w

Investment Securities

Investment Securities	6 Months Ended
	Mar. 31, 2019
Investments Debt And Equity Securities [Abstract]
Investment Securities	5. The amortized cost, gross unrealized gains and losses, and fair value of investment securities available for sale are summarized as follows (in thousands): March 31, 2019 Amortized Cost Gross Unrealized Gains Gross Unrealized Losses Fair Value Available for Sale Fannie Mae $ 145,081 $ 396 $ (2,097 ) $ 143,380 Freddie Mac 88,859 65 (1,370 ) 87,554 Governmental National Mortgage Association Securities 20,142 18 (455 ) 19,705 Total mortgage-backed securities 254,082 479 (3,922 ) 250,639 Obligations of states and political subdivisions 24,454 235 (321 ) 24,368 U.S. government agency securities 8,064 158 (14 ) 8,208 Corporate obligations 47,915 213 (766 ) 47,362 Other debt securities 18,613 4 (577 ) 18,040 Total $ 353,128 $ 1,089 $ (5,600 ) $ 348,617 September 30, 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 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 (a) 25 — (5 ) 20 Total $ 385,831 $ 388 $ (14,781 ) $ 371,438 (a) As of October 1, 2018, the Company adopted ASU 2016-01 resulting in reclassification of equity securities from available for-sale investment securities to other assets. At September 30, 2018, the Company's investment in equity securities was comprised of common stock issued by an unrelated bank holding company. At March 31, 2019 and September 30, 2018, the Company had $21,000 and $20,000 respectively, in equity securities recorded at fair value. Prior to October 1, 2018, equity securities were stated at fair value with unrealized gains and losses reported as a separate component of Accumulated Other Comprehensive Income (AOCI), net of tax. At September 30, 2018, net unrealized loss net of tax of $4,000 had been recognized in AOCI. On October 1, 2018, these unrealized gains and losses were reclassified out of AOCI and into retained earnings with subsequent changes in fair value being recognized in net income. The following is a summary of unrealized and realized gains and losses recognized in net income on equity securities during the three and six months ended March 31, 2019: (Dollars in thousands) Three months ended March 31, 2019 Six months ended March 31, 2019 Net gains and (losses) recognized during the period on equity securities $ 3 $ 1 Less: Net gains and (losses) recognized during the period on equity securities sold during the period — — Unrealized gains and (losses) recognized during the reporting period on equity securities still held at the reporting date $ 3 $ 1 The amortized cost and fair value of debt securities at March 31, 2019, 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 $ — $ — Due after one year through five years 28,061 28,124 Due after five years through ten years 95,084 94,171 Due after ten years 229,983 226,322 Total $ 353,128 $ 348,617 For the three months ended March 31, 2019, the Company realized gross gains of $132,000 and gross losses of $93,000 on proceeds from the sale of investment securities of $20.5 million. For the six months ended March 31, 2019, the Company realized gross gains of $175,000 and gross losses of $132,000 on proceeds from the sale of investment securities of $30.5 million. For the three and six months ended March 31, 2018, the Company realized gross gains of $300,000 and gross losses of $225,000 on proceeds from the sale of investment securities of $22.1 million. The following tables show the Company’s gross unrealized losses and fair value, aggregated by investment category and length of time that the individual securities have been in a continuous unrealized loss position (dollars in thousands): March 31, 2019 Number of Securities Less than Twelve Months Twelve Months or Greater Total Fair Value Gross Unrealized Losses Fair Value Gross Unrealized Losses Fair Value Gross Unrealized Losses Fannie Mae 84 $ 2,718 $ (22 ) $ 102,134 $ (2,075 ) $ 104,852 $ (2,097 ) Freddie Mac 63 — — 75,176 (1,370 ) 75,176 (1,370 ) Governmental National Mortgage Association 16 809 (17 ) 16,534 (438 ) 17,343 (455 ) Obligations of states and political subdivisions 15 — 0 15,753 (321 ) 15,753 (321 ) U.S. government agency securities 1 — — 1,949 (14 ) 1,949 (14 ) Corporate obligations 32 10,896 (103 ) 20,187 (663 ) 31,083 (766 ) Other debt securities 19 1,184 (19 ) 15,789 (558 ) 16,973 (577 ) Total 230 $ 15,607 $ (161 ) $ 247,522 $ (5,439 ) $ 263,129 $ (5,600 ) September 30, 2018 Number of Securities Less than Twelve Months Twelve Months or Greater Total Fair Value Gross Unrealized Losses Fair Value Gross Unrealized Losses Fair Value Gross Unrealized Losses Fannie Mae 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 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 (a) 1 20 (5 ) — 0 20 (5 ) Total 276 $ 138,094 $ (3,047 ) $ 203,329 $ (11,734 ) $ 341,423 $ (14,781 ) (a) As of October 1, 2018, the Company adopted ASU 2016-01 resulting in reclassification of equity securities from available for-sale investment securities to other assets. As September 30, 2018, the Company's investment in equity securities was comprised of common stock issued by an unrelated bank holding company. The Company’s investment securities portfolio contains unrealized losses on securities, including mortgage-related instruments issued or backed by the full faith and credit of the United States government, or generally viewed as having the implied guarantee of the U.S. government, other mortgage backed securities, debt obligations of a U.S. state or political subdivision, U.S. government agency securities, corporate obligations, other debt securities and equity securities. The Company reviews its position quarterly and has asserted that at March 31, 2019, the declines outlined in the above table represent temporary declines and the Company would not be required to sell the above securities before their anticipated recovery in market value. The Company has concluded that any impairment of its investment securities portfolio is not other than temporary but is the result of interest rate changes that are not expected to result in the non-collection of principal and interest during the period.

Loans Receivable, Net and Allow

Loans Receivable, Net and Allowance for Loan Losses	6 Months Ended
	Mar. 31, 2019
Receivables [Abstract]
Loans Receivable, Net and Allowance for Loan Losses	6. Loans Receivable, Net and Allowance for Loan Losses Loans receivable consist of the following (in thousands): March 31, 2019 September 30, 2018 Real estate loans: Residential $ 595,116 $ 580,561 Construction 6,399 3,920 Commercial 458,292 416,573 Commercial 58,720 49,479 Obligations of states and political subdivisions 70,549 73,362 Home equity loans and lines of credit 43,668 43,962 Auto Loans 111,899 146,220 Other 2,943 2,682 1,347,586 1,316,759 Less allowance for loan losses 12,389 11,688 Net loans $ 1,335,197 $ 1,305,071 Purchased loans acquired in a business combination are recorded at fair value on their purchase date without a carryover of the related allowance for loan losses. The following table presents additional information regarding loans acquired and accounted for in accordance with ASC 310-30 (in thousands): March 31, 2019 September 30, 2018 Acquired Loans with Specific Evidence or Deterioration in Credit Quality (ASC 310-30) Acquired Loans with Specific Evidence or Deterioration in Credit Quality (ASC 310-30) Outstanding balance $ 1,593 $ 2,497 Carrying amount $ 1,486 $ 1,802 The following tables show the amount of loans in each category that were individually and collectively evaluated for impairment at the dates indicated (in thousands): Total Loans Individually Evaluated for Impairment Loans Acquired with Deteriorated Credit Quality Collectively Evaluated for Impairment March 31, 2019 Real estate loans: Residential $ 595,116 $ 4,311 $ — $ 590,805 Construction 6,399 — — 6,399 Commercial 458,292 2,075 1,486 454,731 Commercial 58,720 551 — 58,169 Obligations of states and political subdivisions 70,549 — — 70,549 Home equity loans and lines of credit 43,668 256 — 43,412 Auto loans 111,899 500 — 111,399 Other 2,943 16 — 2,927 Total $ 1,347,586 $ 7,709 $ 1,486 $ 1,338,391 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 sub divisions 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 The Company maintains a loan review system that allows for a periodic review of our loan portfolio and the early identification of potential impaired loans. Such system takes into consideration, among other things, delinquency status, size of loans, type and market value of collateral and financial condition of the borrowers. Specific loan loss allowances are established for identified losses based on a review of such information. A loan evaluated for impairment is considered to be impaired when, based on current information and events, it is probable that we will be unable to collect all amounts due according to the contractual terms of the loan agreement. All loans identified as impaired are evaluated independently. The Company does not aggregate such loans for evaluation purposes. Impairment is measured on a loan-by-loan basis for commercial and construction loans by the present value of expected future cash flows discounted at the loan’s effective interest rate, the loan’s obtainable market price, or the fair value of the collateral if the loan is collateral-dependent. Large groups of smaller balance homogeneous loans are collectively evaluated for impairment. Accordingly, the Company does not separately identify individual consumer and residential mortgage loans for impairment disclosures, unless such loans are part of a larger relationship that is impaired, or are classified as a troubled debt restructuring. A loan is considered to be a troubled debt restructuring (“TDR”) loan when the Company grants a concession to the borrower that it would not otherwise consider because of the borrower’s financial condition. Such concessions include the reduction of interest rates, forgiveness of principal or interest, or other modifications of interest rates that are less than the current market rate for new obligations with similar risk. TDR loans that are in compliance with their modified terms and that yield a market rate at the time of modification may be removed from TDR status after one year of performance. The following tables include the recorded investment and unpaid principal balances for impaired loans with the associated allowance amount at the dates indicated, if applicable (in thousands): Recorded Investment Unpaid Principal Balance Associated Allowance March 31, 2019 With no specific allowance recorded: Real estate loans Residential $ 3,315 $ 4,615 $ — Construction — — — Commercial 1,811 2,534 — Commercial 454 608 — Obligations of states and political subdivisions — — — Home equity loans and lines of credit 238 275 — Auto loans 136 216 — Other 16 23 — Total 5,970 8,271 — With an allowance recorded: Real estate loans Residential 996 1,227 144 Construction — — — Commercial 264 297 65 Commercial 97 100 88 Obligations of states and political subdivisions — — — Home equity loans and lines of credit 18 18 6 Auto loans 364 469 149 Other — — — Total 1,739 2,111 452 Total: Real estate loans Residential 4,311 5,842 144 Construction — — — Commercial 2,075 2,831 65 Commercial 551 708 88 Obligations of states and political subdivisions — — — Home equity loans and lines of credit 256 293 6 Auto loans 500 685 149 Other 16 23 — Total Impaired Loans $ 7,709 $ 10,382 $ 452 Recorded Investment Unpaid Principal Balance Associated Allowance September 30, 2018 With no specific allowance recorded: Real Estate Loans Residential $ 4,449 $ 6,176 $ — Construction — — — Commercial 5,892 6,790 — Commercial 85 349 — Obligations of states and political subdivisions — — — Home equity loans and lines of credit 114 138 — Auto Loans 87 223 — Other 17 25 — Total 10,644 13,701 — With an allowance recorded: Real Estate Loans Residential 868 938 149 Construction — — — Commercial — — — Commercial — — — Obligations of states and political subdivisions — — — Home equity loans and lines of credit — — — Auto Loans 358 375 164 Other — — — Total 1,226 1,313 313 Total: Real Estate Loans Residential 5,317 7,114 149 Construction — — — Commercial 5,892 6,790 — Commercial 85 349 — Obligations of states and political subdivisions — — — Home equity loans and lines of credit 114 138 — Auto Loans 445 598 164 Other 17 25 — Total Impaired Loans $ 11,870 $ 15,014 $ 313 The following tables represent the average recorded investments in the impaired loans and the related amount of interest recognized during the time within the period that the impaired loans were impaired (in thousands): For the Three Months Ended March 31, 2019 2018 2019 2018 Average Recorded Investment Average Recorded Investment Interest Income Recognized Interest Income Recognized With no specific allowance recorded: Real estate loans Residential $ 3,567 $ 4,180 $ — $ 6 Construction — — — — Commercial 1,934 6,789 8 69 Commercial 207 1,178 1 24 Obligations of states and political subdivisions — — — — Home equity loans and lines of credit 229 203 — — Auto loans 85 208 1 — Other 16 28 — — Total 6,038 12,586 10 99 With an allowance recorded: Real estate loans Residential 1,151 1,256 — — Construction — — — — Commercial 88 19 — — Commercial 32 — — — Obligations of states and political subdivisions — — — — Home equity loans and lines of credit 33 12 — — Auto loans 250 231 — — Other — — — — Total 1,554 1,518 — — Total: Real estate loans Residential 4,718 5,436 — 6 Construction — — — — Commercial 2,022 6,808 8 69 Commercial 239 1,178 1 24 Obligations of states and political subdivisions — — — — Home equity loans and lines of credit 262 215 — — Auto loans 335 439 1 — Other 16 28 — — Total Impaired Loans $ 7,592 $ 14,104 $ 10 $ 99 For the Six Months Ended March 31, 2019 2018 2019 2018 Average Recorded Investment Average Recorded Investment Interest Income Recognized Interest Income Recognized With no specific allowance recorded: Real estate loans Residential $ 3,867 $ 4,305 $ 3 $ 16 Construction — — — — Commercial 3,209 6,897 54 141 Commercial 145 1,233 1 51 Obligations of states and political subdivisions — — — — Home equity loans and lines of credit 190 205 — 1 Auto loans 86 172 1 1 Other 17 29 — — Total 7,514 12,841 59 210 With an allowance recorded: Real estate loans Residential 983 1,392 — — Construction — — — — Commercial 44 19 — — Commercial 16 — — — Obligations of states and political subdivisions — — — — Home equity loans and lines of credit 23 7 — — Auto loans 227 247 — 0 Other — — — — Total 1,293 1,665 — 0 Total: Real estate loans Residential 4,850 5,697 3 16 Construction — — — — Commercial 3,253 6,916 54 141 Commercial 161 1,233 1 51 Obligations of states and political subdivisions — — — — Home equity loans and lines of credit 213 212 — 1 Auto loans 313 419 1 1 Other 17 29 — — Total Impaired Loans $ 8,807 $ 14,506 $ 59 $ 210 The Company uses a ten-point internal risk-rating system to monitor the credit quality of the overall loan portfolio. The first six categories are considered not criticized and are aggregated as Pass-rated. The criticized rating categories utilized by management generally follow bank regulatory definitions. The Special Mention category includes assets that are fundamentally sound yet exhibit potentially unacceptable credit risk or deteriorating trends or characteristics which, if left uncorrected, may result in deterioration of the repayment prospects for the asset or in the Company’s credit position at some future date. Loans in the Substandard category have well-defined weaknesses that jeopardize the liquidation of the debt and have a distinct possibility that some loss will be sustained if the weaknesses are not corrected. All loans that are 90 or more days past due are considered Substandard. Loans in the Doubtful category have all the weaknesses inherent in loans classified as Substandard with the added characteristic that their weaknesses make collection or liquidation in full, on the basis of currently existing facts, conditions, and values, highly questionable and improbable. Loans in the Loss category are considered uncollectible and of little value that their continuance as bankable assets is not warranted. Certain residential real estate loans, construction loans, home equity loans and lines of credit, auto loans and other consumer loans are underwritten and structured using standardized criteria and characteristics, primarily payment performance, and are normally risk rated and monitored collectively on a monthly basis. These are typically loans to individuals in the consumer categories and are delineated as either performing or non-performing. To help ensure that risk ratings are accurate and reflect the present and future capacity of borrowers to repay a loan as agreed, the Bank has a structured loan rating process with several layers of internal and external oversight. Generally, consumer and residential mortgage loans are included in the Pass categories unless a specific action, such as bankruptcy, repossession, or death occurs to raise awareness of a possible credit event. The Bank’s Commercial Loan Officers are responsible for the timely and accurate risk rating recommendation for the loans in their portfolios at origination and on an ongoing basis. The Bank’s Commercial Loan Officers perform an annual review of all commercial relationships $750,000 or greater. Confirmation of the appropriate risk grade is included in the review on an ongoing basis. The Bank engages an external consultant to conduct loan reviews on at least a semi-annual basis. Generally, the external consultant reviews commercial relationships greater than $1,000,000 and/or all criticized relationships. Detailed reviews, including plans for resolution, are performed on loans classified as Substandard on a quarterly basis. Loans in the Special Mention and Substandard categories that are collectively evaluated for impairment are given separate consideration in the determination of the allowance. The following tables present the classes of the loan portfolio summarized by the aggregate Pass and the criticized categories of Special Mention, Substandard, and Doubtful or Loss within the internal risk rating system at March 31, 2019 and September 30, 2018 (in thousands): Pass Special Mention Substandard Doubtful or Loss Total March 31, 2019 Commercial real estate loans $ 438,820 $ 9,149 $ 10,323 $ — $ 458,292 Commercial 57,744 6 970 — 58,720 Obligations of states and political subdivisions 70,549 — — — 70,549 Total $ 567,113 $ 9,155 $ 11,293 $ — $ 587,561 Pass Special Mention Substandard Doubtful or Loss 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 All other loans are underwritten and structured using standardized criteria and characteristics, primarily payment performance, and are normally risk rated and monitored collectively on a monthly basis. These are typically loans to individuals in the consumer categories and are delineated as either performing or non-performing. The following tables present the risk ratings in the consumer categories of performing and non-performing loans at March 31, 2019 and September 30, 2018 (in thousands): Performing Non- performing Purchased Credit Impaired Total March 31, 2019 Real estate loans: Residential $ 590,647 $ 4,469 $ — $ 595,116 Construction 6,399 — — 6,399 Home equity loans and lines of credit 43,280 388 — 43,668 Auto loans 111,220 679 — 111,899 Other 2,909 34 — 2,943 Total $ 754,455 $ 5,570 $ — $ 760,025 Performing Non- performing Purchased Impaired Credit 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 The Company further monitors the performance and credit quality of the loan portfolio by analyzing the age of the portfolio as determined by the length of time a recorded payment is past due. The following tables present the classes of the loan portfolio summarized by the aging categories of performing loans and nonaccrual loans as of March 31, 2019 and September 30, 2018 (in thousands): 31-60 Days 61-89 Days 90 + Days Past Due and Total Purchased Credit Impaired Total Current Past Due Past Due Accruing Non­accrual Past Due Accruing Non­accrual Loans March 31, 2019 Real estate loans: Residential $ 588,638 $ 1,283 $ 726 $ — $ 4,469 $ 6,478 $ — $ — $ 595,116 Construction 6,399 — — — — — — — 6,399 Commercial 455,031 70 — — 1,921 1,991 249 1,021 458,292 Commercial 57,818 37 21 — 628 686 — 216 58,720 Obligations of states and political subdivisions 70,549 — — — — — — — 70,549 Home equity loans and lines of credit 43,145 129 6 — 388 523 — — 43,668 Auto loans 109,914 1,280 26 — 679 1,985 — — 111,899 Other 2,881 16 12 — 34 62 — — 2,943 Total $ 1,334,375 $ 2,815 $ 791 $ — $ 8,119 $ 11,725 $ 249 $ 1,237 $ 1,347,586 31-60 Days 61-89 Days 90 + Days Past Due and Total Purchased Credit Impaired Total Current Past Due Past Due Accruing Non­accrual Past Due Accruing Non­accrual Loans September 30, 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 The allowance for loan losses is maintained at a level necessary to absorb loan losses that are both probable and reasonably estimable. Management, in determining the allowance for loan losses, considers the losses inherent in its loan portfolio and changes in the nature and volume of loan activities, along with the general economic and real estate market conditions. The allowance for loan losses consists of two elements: (1) an allocated allowance, which comprises allowances established on specific loans and class allowances based on historical loss experience and current trends, and (2) an allocated allowance based on general economic conditions and other risk factors in our markets and portfolios. We maintain a loan review system, which allows for a periodic review of our loan portfolio and the early identification of potential impaired loans. Such system takes into consideration, among other things, delinquency status, size of loans, type and market value of collateral and financial condition of the borrowers. General loan loss allowances are based upon a combination of factors including, but not limited to, actual loan loss experience, composition of the loan portfolio, current economic conditions, management’s judgment and losses which are probable and reasonably estimable. The allowance is increased through provisions charged against current earnings and recoveries of previously charged-off loans. Loans that are determined to be uncollectible are charged against the allowance. While management uses available information to recognize probable and reasonably estimable loan losses, future loss provisions may be necessary, based on changing economic conditions. Payments received on impaired loans generally are either applied against principal or reported as interest income, according to management’s judgment as to the collectability of principal. The allowance for loan losses as of March 31, 2019 was maintained at a level that represents management’s best estimate of losses inherent in the loan portfolio, and such losses were both probable and reasonably estimable. In addition, the FDIC and the Pennsylvania Department of Banking and Securities, as an integral part of their examination process, have periodically reviewed our allowance for loan losses. The banking regulators may require that we recognize additions to the allowance based on its analysis and review of information available to it at the time of its examination. Management reviews the loan portfolio on a quarterly basis using a defined, consistently applied process in order to make appropriate and timely adjustments to the allowance for loan losses (“ALL”). When information confirms all or part of specific loans to be uncollectible, these amounts are promptly charged off against the ALL. The following table summarizes changes in the primary segments of the ALL for the three and six months periods ended March 31, 2019 and 2018 (in thousands): Home Obligations of Equity States and Loans and Real Estate Loans Commercial Political Lines of Other Residential Construction Commercial Loans Subdivisions Credit Auto Loans Loans Unallocated Total ALL balance at December 31, 2018 $ 3,745 $ 43 $ 3,496 $ 1,704 $ 295 $ 298 $ 1,694 $ 26 $ 920 $ 12,221 Charge-offs (131 ) — (7 ) — — (19 ) (370 ) (11 ) — (538 ) Recoveries 3 — 12 — — 2 88 1 — 106 Provision 125 16 315 161 (1 ) 14 196 11 (237 ) 600 ALL balance at March 31, 2019 $ 3,742 $ 59 $ 3,816 $ 1,865 $ 294 $ 295 $ 1,608 $ 27 $ 683 $ 12,389 ALL balance at December 31, 2017 $ 3,769 $ 33 $ 2,319 $ 1,054 $ 213 $ 449 $ 1,962 $ 21 $ 13 $ 9,833 Charge-offs (52 ) — (14 ) (5 ) — (6 ) (550 ) (15 ) — (642 ) Recoveries 3 — — — — 3 211 2 — 219 Provision 35 0 516 170 56 (45 ) 281 13 74 1,100 ALL balance at March 31, 2018 $ 3,755 $ 33 $ 2,821 $ 1,219 $ 269 $ 401 $ 1,904 $ 21 $ 87 $ 10,510 ALL balance at September 30, 2018 $ 3,605 $ 35 $ 3,458 $ 1,462 $ 323 $ 296 $ 1,859 $ 23 $ 627 $ 11,688 Charge-offs (273 ) — (7 ) (22 ) — (19 ) (738 ) (11 ) — (1,070 ) Recoveries 9 — 12 — — 3 269 2 — 295 Provision 401 24 353 425 (29 ) 15 218 13 56 1,476 ALL balance at March 31, 2019 $ 3,742 $ 59 $ 3,816 $ 1,865 $ 294 $ 295 $ 1,608 $ 27 $ 683 $ 12,389 ALL balance at September 30, 2017 $ 3,878 $ 23 $ 1,758 $ 987 $ 248 $ 470 $ 1,836 $ 21 $ 144 $ 9,365 Charge-offs (95 ) — (15 ) (137 ) — (6 ) (1,087 ) (21 ) — (1,361 ) Recoveries 6 — 2 10 — 5 381 2 — 406 Provision (34 ) 10 1,076 359 21 (68 ) 774 19 (57 ) 2,100 ALL balance at March 31, 2018 $ 3,755 $ 33 $ 2,821 $ 1,219 $ 269 $ 401 $ 1,904 $ 21 $ 87 $ 10,510 During the three months ended March 31, 2018 the Company recorded provision expense for the construction loans, commercial real estate, commercial, obligations of states and political subdivisions, auto and other loan segments. Credit provisions were recorded for the residential real estate and home equity loans and line of credit segments. During the three and six months ended March 31, 2019 the Company recorded provision expense for the residential real estate, construction loans, commercial real estate, commercial, home equity loans and lines of credit, 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 obligations of states and political subdivisions segment. During the six months ended March 31, 2018 the Company recorded provision expense for the residential real estate, construction loans, commercial real estate, commercial, 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. The following table summarizes the primary segments of the ALL, segregated into two categories, the amount required for loans individually evaluated for impairment and the amount required for loans collectively evaluated for impairment as of March 31, 2019 and September 30, 2018 (in thousands): Home Obligations of Equity States and Loans and Real Estate Loans Commercial Political Lines of Other Residential Construction Commercial Loans Subdivisions Credit Auto Loans Loans Unallocated Total Individually evaluated for impairment $ 144 $ — $ 65 $ 88 $ — $ 6 $ 149 $ — $ — $ 452 Collectively evaluated for impairment 3,598 59 3,751 1,777 294 289 1,459 27 683 11,937 ALL balance at March 31, 2019 $ 3,742 $ 59 $ 3,816 $ 1,865 $ 294 $ 295 $ 1,608 $ 27 $ 683 $ 12,389 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 The allowance for loan losses is based on estimates, and actual losses will vary from current estimates. Management believes that the granularity of the homogeneous pools and the related historical loss ratios and other qualitative factors, as well as the consistency in the application of assumptions, result in an ALL that is representative of the risk found in the components of the portfolio at any given date. Despite the above allocations, the allowance for loan losses is general in nature and is available to absorb losses from any loan segment. There were no troubled debt restructurings granted during the three months ended March 31, 2019. The following is a summary of troubled debt restructuring granted during the three months ended March 31, 2018 and the six months ended March 31, 2019 and 2018 (dollars in thousands): For the Three Months Ended March 31, 2018 Number of Contracts Pre-Modification Outstanding Recorded Investment Post-Modification Outstanding Recorded Investment Troubled Debt Restructurings Real estate loans: Residential — $ — $ — Construction — — — Commercial 1 107 107 Commercial — — — Obligations of states and political subdivisions — — — Home equity loans and lines of credit — — — Auto loans 1 15 15 Other — — — Total 2 $ 122 $ 122 For the Six Months Ended March 31, 2019 Number of Contracts Pre-Modification Outstanding Recorded Investment Post-Modification Outstanding Recorded Investment Troubled Debt Restructurings Real estate loans: Residential 2 $ 95 $ 95 Construction — — — Commercial — — — Commercial — — — Obligations of states and political subdivisions — — — Home equity loans and lines of credit 2 159 159 Auto loans 1 21 21 Other — — — Total 5 $ 275 $ 275 For the Six Months Ended March 31, 2018 Number of Contracts Pre-Modification Outstanding Recorded Investment Post-Modification Outstanding Recorded Investment Troubled Debt Restructurings Real estate loans: Residential 2 $ 243 $ 235 Construction — — — Commercial 1 107 107 Commercial — — — Obligations of states and political subdivisions — — — Home equity loans and lines of credit — — — Auto loans 1 15 15 Other — — — Total 4 $ 365 $ 357 For the three months ended March 31, 2018, one loan $107,000 was granted term concessions and one loan for $15,000 was granted terms and rate concessions. Of the five new troubled debt restructurings granted for the six months ended March 31, 2019, one loan totaling $14,000 was granted term concessions, one loan totaling $81,000 was granted an interest rate concession and three loans totaling $180,000 were granted term and rate concessions. For the six months ended March 31, 2018, three loans totaling $250,000 were granted terms and rate concessions and one loan for $107,000 was granted term concessions. For the three and six months ended March 31, 2019, no loans defaulted on a restructuring agreement within one year of modification. For the three months ended March 31, 2018, one loan totaling $72,000 defaulted on a restructuring agreement within one year of modification. For the six months ended March 31, 2018, two loans totaling $95,000 defaulted on a restructuring agreement 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 in the Consolidated Balance Sheet. As of March 31, 2019, included within the foreclosed assets is $620,000 of consumer residential mortgages that were foreclosed on or received via a deed in lieu of foreclosure transaction prior to the period end. As of March 31, 2019, the Company has initiated formal foreclosure proceedings on $2.2 million of consumer residential mortgages which have not yet been transferred into foreclosed assets.

Deposits

Deposits	6 Months Ended
	Mar. 31, 2019
Banking And Thrift [Abstract]
Deposits	7. Deposits Deposits consist of the following major classifications (in thousands): March 31, 2019 September 30, 2018 Non-interest bearing demand accounts $ 167,948 $ 158,340 Interest bearing demand accounts 178,593 221,327 Money market accounts 327,906 296,078 Savings and club accounts 136,875 135,862 Certificates of deposit 482,561 525,248 Total $ 1,293,883 $ 1,336,855

Net Periodic Benefit Cost-Defin

Net Periodic Benefit Cost-Defined Benefit Plan	6 Months Ended
	Mar. 31, 2019
Compensation And Retirement Disclosure [Abstract]
Net Periodic Benefit Cost-Defined Benefit Plan	8 . Net Periodic Benefit Cost-Defined Benefit Plan For a detailed disclosure on the Bank’s pension and employee benefits plans, please refer to Note 12 of the Company’s Consolidated Financial Statements for the year ended September 30, 2018 included in the Company’s Annual Report on Form 10-K. The following table comprises the components of net periodic benefit cost for the three and six month periods ended March 31, 2019 and 2018 (in thousands): For the Three Months Ended March 31, For the Six Months Ended March 31, 2019 2018 2019 2018 Service Cost $ — $ — $ — $ — Interest Cost 173 175 347 349 Expected return on plan assets (293 ) (299 ) (586 ) (597 ) Amortization of unrecognized loss — — — — Net periodic benefit cost $ (120 ) $ (124 ) $ (239 ) $ (248 ) The Company’s board of directors adopted resolutions to freeze the status of the Defined Benefit Plan (“the plan”) effective February 28, 2017 (“the freeze date”). Accordingly, no additional participants will enter the plan after February 28, 2017; no additional years of service for benefit accrual purposes will be credited after the freeze date under the plan; and compensation earned by participants after the freeze date will not be taken into account under the plan.

Equity Incentive Plan

Equity Incentive Plan	6 Months Ended
	Mar. 31, 2019
Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]
Equity Incentive Plan	9 . Equity Incentive Plan The Company previously maintained the ESSA Bancorp, Inc. 2007 Equity Incentive Plan (the “Plan”). The Plan provided for a total of 2,377,326 shares of common stock for issuance upon the grant or exercise of awards. Of the shares that were available under the Plan, 1,698,090 were available to be issued in connection with the exercise of stock options and 679,236 were available to be issued as restricted stock. The Plan allowed for the granting of non-qualified stock options (“NSOs”), incentive stock options (“ISOs”), and restricted stock. Options granted under the plan were granted at no less than the fair value of the Company’s common stock on the date of the grant. As of the effective date of the 2016 Equity Incentive Plan (detailed below), no further grants will be made under the Plan and forfeitures of outstanding awards under the Plan will be added to the shares available under the 2016 Equity Incentive Plan. The Company replaced the 2007 Equity Incentive Plan with the ESSA Bancorp, Inc. 2016 Equity Incentive Plan (the “2016 Plan”) which was approved by shareholders on March 3, 2016. The 2016 Plan provides for a total of 250,000 shares of common stock for issuance upon the grant or exercise of awards. The 2016 Plan allows for the granting of restricted stock, restricted stock units, ISOs and NSOs. The Company classifies share-based compensation for employees and outside directors within “Compensation and employee benefits” in the Consolidated Statement of Operations to correspond with the same line item as compensation paid. Restricted stock shares outstanding at March 31, 2019 vest over periods ranging from 6 to 43 months. The product of the number of shares granted and the grant date market price of the Company’s common stock determines the fair value of restricted shares under the Company’s restricted stock plan. The Company expenses the fair value of all share based compensation grants over the requisite service period. For the three months ended March 31, 2019 and 2018, the Company recorded $98,000 and $104,000 of share based compensation expense, respectively, comprised of restricted stock expense. For the six months ended March 31, 2019 and 2018, the Company recorded $350,000 and $184,000 of share-based compensation expense, respectively, comprised of restricted stock expense. Expected future compensation expense relating to the restricted shares outstanding at March 31, 2019 is $736,000 over the remaining vesting period of 3.50 years. The following is a summary of the status of the Company’s restricted stock as of March 31, 2019, and changes therein during the six month period then ended: Number of Restricted Weighted- average Grant Date Fair Value Nonvested at September 30, 2018 35,072 $ 15.37 Granted 37,236 16.23 Vested (11,625 ) 15.95 Forfeited (5,120 ) 15.87 Nonvested at March 31, 2019 55,563 $ 15.93

Fair Value

Fair Value	6 Months Ended
	Mar. 31, 2019
Fair Value Disclosures [Abstract]
Fair Value	10. Fair Value The following disclosures show the hierarchal disclosure framework associated within the level of pricing observations utilized in measuring assets and liabilities at fair value. The definition of fair value maintains the exchange price notion in earlier definitions of fair value but focuses on the exit price of the asset or liability. The exit price is the price that would be received to sell the asset or paid to transfer the liability adjusted for certain inherent risks and restrictions. Expanded disclosures are also required about the use of fair value to measure assets and liabilities. Assets and Liabilities Required to be Measured and Reported at Fair Value on a Recurring Basis The following tables provide the fair value for assets required to be measured and reported at fair value on a recurring basis on the Consolidated Balance Sheet as of March 31, 2019 and September 30, 2018 by level within the fair value hierarchy (in thousands). Recurring Fair Value Measurements at Reporting Date March 31, 2019 Level I Level II Level III Total Investment securities available for sale: Mortgage backed securities $ — $ 250,639 $ — $ 250,639 Obligations of states and political subdivisions — 24,368 — 24,368 U.S. government agencies — 8,208 — 8,208 Corporate obligations — 39,629 7,733 47,362 Other debt securities — 18,040 — 18,040 Total Debt Securities $ — $ 340,884 $ 7,733 $ 348,617 Equity securities- financial services $ 21 $ — $ — $ 21 Derivatives and hedging activities: — 1,143 — 1,143 September 30, 2018 Level I Level II Level III Total 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 agencies — 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 The following tables present a summary of changes in the fair value of the Company’s Level III investments for the three and six month periods ended March 31, 2019 and 2018 (in thousands). Fair Value Measurement Using Significant Unobservable Inputs (Level III) Three Months Ended March 31, 2019 March 31, 2018 Beginning balance $ 7,642 $ 7,826 Purchases, sales, issuances, settlements, net — — Total unrealized gain (loss): Included in earnings — — Included in other comprehensive income (loss) 91 (59 ) Transfers in and/or out of Level III — — $ 7,733 $ 7,767 Fair Value Measurement Using Significant Unobservable Inputs (Level III) Six Months Ended March 31, 2019 March 31, 2018 Beginning balance $ 7,738 $ 7,224 Purchases, sales, issuances, settlements, net — 500 Total unrealized gain (loss): Included in earnings — — Included in other comprehensive (loss) income (5 ) 43 Transfers in and/or out of Level III — — $ 7,733 $ 7,767 Each financial asset and liability is identified as having been valued according to a specified level of input, 1, 2 or 3. Level 1 inputs are quoted prices (unadjusted) in active markets for identical assets or liabilities that the Company has the ability to access at the measurement date. Fair values determined by Level 2 inputs utilize inputs other than quoted prices included in Level 1 that are observable for the asset, either directly or indirectly. Level 2 inputs include quoted prices for similar assets in active markets, and inputs other than quoted prices that are observable for the asset or liability. Level 3 inputs are unobservable inputs for the asset, and include situations where there is little, if any, market activity for the asset or liability. In certain cases, the inputs used to measure fair value may fall into different levels of the fair value hierarchy. In such cases, the level in the fair value hierarchy, within which the fair value measurement in its entirety falls, has been determined based on the lowest level input that is significant to the fair value measurement in its entirety. The Company’s assessment of the significance of a particular input to the fair value measurement in its entirety requires judgment, and considers factors specific to the asset. The measurement of fair value should be consistent with one of the following valuation techniques: market approach, income approach, and/or cost approach. The market approach uses prices and other relevant information generated by market transactions involving identical or comparable assets or liabilities (including a business). For example, valuation techniques consistent with the market approach often use market multiples derived from a set of comparable. Multiples might lie in ranges with a different multiple for each comparable. The selection of where within the range the appropriate multiple falls requires judgment, considering factors specific to the measurement (qualitative and quantitative). Valuation techniques consistent with the market approach include matrix pricing. Matrix pricing is a mathematical technique used principally to value debt securities without relying exclusively on quoted prices for the specific securities, but rather by relying on a security’s relationship to other benchmark quoted securities. Most of the securities classified as available for sale are reported at fair value utilizing Level 2 inputs. For these securities, the Company obtains fair value measurements from an independent pricing service. The fair value measurements consider observable data that may include dealer quoted market spreads, cash flows, the U.S. Treasury yield curve, live trading levels, trade execution data, market consensus prepayment speeds, credit information and the bond’s terms and conditions, among other things. Securities reported at fair value utilizing Level 1 inputs are limited to actively traded equity securities whose market price is readily available from the New York Stock Exchange or the NASDAQ exchange. A few securities are valued using Level 3 inputs, all of these are classified as available for sale and are reported at fair value using Level 3 inputs. Assets and Liabilities Required to be Measured and Reported on a Non-Recurring Basis The following tables provide the fair value for assets required to be measured and reported at fair value on a non recurring basis on the Consolidated Balance Sheet as of March 31, 2019 and September 30, 2018 by level within the fair value hierarchy: Non-Recurring Fair Value Measurements at Reporting Date (in thousands) March 31, 2019 Level I Level II Level III Total Foreclosed real estate $ — $ — $ 665 $ 665 Impaired loans — — 7,257 7,257 September 30, 2018 Level I Level II Level III Total Foreclosed real estate $ — $ — $ 1,141 $ 1,141 Impaired loans — — 11,557 11,557 The following tables present additional quantitative information about assets measured at fair value on a nonrecurring basis and for which the Company has utilized Level 3 inputs to determine fair value: Quantitative Information about Level 3 Fair Value Measurements (dollars in thousands) Fair Value Estimate Valuation Techniques Unobservable Input Range March 31, 2019 Impaired loans $ 7,257 Appraisal of collateral (1) Appraisal adjustments (2) 0% to 35% (20.8%) Foreclosed real estate owned 665 Appraisal of collateral (1), (3) Appraisal adjustments (2) 20% to 46% (26.8%) Quantitative Information about Level 3 Fair Value Measurements (dollars in thousands) Fair Value Estimate Valuation Techniques Unobservable Input Range September 30, 2018 Impaired loans $ 11,557 Appraisal of collateral (1) Appraisal adjustments (2) 0% to 57% (24.0%) Foreclosed real estate owned 1,141 Appraisal of collateral (1), (3) 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 3 inputs which are not identifiable. (2) Appraisals may be adjusted by management for qualitative factors such as economic conditions and estimated liquidation expenses. The range of liquidation expenses and other appraisal adjustments are presented as a percent of the appraisal. Foreclosed real estate is measured at fair value, less cost to sell at the date of foreclosure, valuations are periodically performed by management and the assets are carried at the lower of carrying amount or fair value, less cost to sell. Income and expenses from operations and changes in valuation allowance are included in the net expenses from foreclosed real estate. Impaired loans are reported at fair value utilizing level three inputs. For these loans, a review of the collateral is conducted and an appropriate allowance for loan losses is allocated to the loan. At March 31, 2019, 146 impaired loans with a carrying value of $7.7 million were reduced by specific valuation allowance totaling $452,000 resulting in a net fair value of $7.3 million based on Level 3 inputs. At September 30, 2018, 133 impaired loans with a carrying value of $11.9 million were reduced by a specific valuation totaling $313,000 resulting in a net fair value of $11.6 million based on Level 3 inputs. Assets and Liabilities not Required to be Measured and Reported at Fair Value The methods and assumptions used by the Company in estimating fair values of financial instruments at March 31, 2019 is in accordance with ASC Topic 825, Financial Instruments March 31, 2019 (in thousands) Carrying Level I Level II Level III Total Fair Value Financial assets: Cash and cash equivalents $ 41,159 $ 41,159 $ — $ — $ 41,159 Certificates of deposit 250 — — 250 250 Loans receivable, net 1,335,197 — — 1,307,305 1,307,305 Accrued interest receivable 7,038 7,038 — — 7,038 Regulatory stock 14,633 14,633 — — 14,633 Mortgage servicing rights 210 — — 323 323 Bank owned life insurance 39,114 39,114 — — 39,114 Financial liabilities: Deposits $ 1,293,883 $ 811,322 $ — $ 480,401 $ 1,291,723 Short-term borrowings 198,293 198,293 — — 198,293 Other borrowings 139,673 — — 139,594 139,594 Advances by borrowers for taxes and insurance 10,353 10,353 — — 10,353 Accrued interest payable 1,873 1,873 — — 1,873 September 30, 2018 (in thousands) Carrying 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 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 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

Accumulated Other Comprehensive

Accumulated Other Comprehensive Loss	6 Months Ended
	Mar. 31, 2019
Equity [Abstract]
Accumulated Other Comprehensive Loss	11. Accumulated Other Comprehensive Loss The activity in accumulated other comprehensive loss for the three and six month periods ended March 31, 2019 and 2018 is as follows (in thousands): Accumulated Other Comprehensive Loss Defined Benefit Pension Plan Unrealized (Losses) on Securities Available for Sale Derivatives Total Balance at December 31, 2018 $ (477 ) $ (7,377 ) $ 1,192 (6,662 ) Other comprehensive income (loss) before reclassifications — 3,846 (267 ) 3,579 Amounts reclassified from accumulated other comprehensive loss — (31 ) (215 ) (246 ) Period change — 3,815 (482 ) 3,333 Balance at March 31, 2019 $ (477 ) $ (3,562 ) $ 710 $ (3,329 ) Balance at December 31, 2017 $ (628 ) $ (2,215 ) $ 1,087 $ (1,756 ) Other comprehensive income before reclassifications — (5,100 ) 587 (4,513 ) Amounts reclassified from accumulated other comprehensive loss — (57 ) (63 ) (120 ) Period change — (5,157 ) 524 (4,633 ) Reclassification of certain income tax effects from other comprehensive (loss) income (124 ) (436 ) 214 (346 ) Balance at March 31, 2018 $ (752 ) $ (7,808 ) $ 1,825 $ (6,735 ) Accumulated Other Comprehensive Income/(Loss) Defined Benefit Pension Plan Unrealized Gains (Losses) on Securities Available for Sale Derivatives Total Balance at September 30, 2018 $ (477 ) $ (11,369 ) $ 1,936 $ (9,910 ) Other comprehensive income (loss) before reclassifications — 7,837 (840 ) 6,997 Amounts reclassified from accumulated other comprehensive loss, net of tax — (34 ) (386 ) (420 ) Reclassification of certain income tax effects from accumulated other comprehensive loss — 4 — 4 Period change — 7,807 (1,226 ) 6,581 Balance at March 31, 2019 $ (477 ) $ (3,562 ) $ 710 $ (3,329 ) Balance at September 30, 2017 $ (628 ) $ (927 ) $ 801 $ (754 ) Other comprehensive income before reclassifications — (6,388 ) 888 (5,500 ) Amounts reclassified from accumulated other comprehensive loss — (57 ) (78 ) (135 ) Period change — (6,445 ) 810 (5,635 ) Reclassification of certain income tax effects from accumulated other comprehensive loss (124 ) (436 ) 214 (346 ) Balance at March 31, 2018 $ (752 ) $ (7,808 ) $ 1,825 $ (6,735 ) The following table presents significant amounts reclassified out of each component of accumulated other comprehensive loss for the three and six month periods ended March 31, 2019 and 2018 (in thousands): Amount Reclassified from Accumulated Other Comprehensive Loss Details About Accumulated Other Comprehensive Loss Components Accumulated Other Comprehensive Loss for the Three Months Ended March 31, Affected Line Item in the Consolidated Statement of Income 2019 2018 Securities available for sale Net securities gains reclassified into earnings $ 39 $ 75 Gain on sale of investments, net Related income tax expense (8 ) (18 ) Income taxes Net effect on accumulated other comprehensive loss for the period 31 57 Derivatives and hedging activities: Interest expense, effective portion 271 76 Interest expense Related income tax expense (56 ) (13 ) Income taxes Net effect on accumulated other comprehensive loss for the period 215 63 Total reclassification for the period $ 246 $ 120 Amount Reclassified from Accumulated Other Comprehensive Loss Accumulated Other Comprehensive Loss For the Six Months Ended March 31, Affected Line Item in the Consolidated Statement of Income 2019 2018 Securities available for sale: Net securities gains reclassified into earnings $ 43 $ 75 Gain on sale of investments, net Related income tax expense (9 ) (18 ) Income taxes Net effect on accumulated other comprehensive loss for the period 34 57 Net of tax Derivative and Hedging Activities: Interest expense, effective portion 488 99 Interest expense Related income tax expense (102 ) (21 ) Income taxes Net effect on accumulated other comprehensive loss for the period 386 78 Net of tax Total reclassification for the period $ 420 $ 135

Derivative and Hedging Activiti

Derivative and Hedging Activities	6 Months Ended
	Mar. 31, 2019
Derivative Instruments And Hedging Activities Disclosure [Abstract]
Derivatives and Hedging Activities	12. Derivatives and Hedging Activities Risk Management Objective of Using Derivatives The Company is exposed to certain risks arising from both its business operations and economic conditions. The Company principally manages its exposures to a wide variety of business and operational risks through management of its core business activities. The Company manages economic risks, including interest rate, liquidity, and credit risk, primarily by managing the amount, sources, and duration of its assets and liabilities and through the use of derivative financial instruments. Specifically, the Company enters into derivative financial instruments to manage exposures that arise from business activities that result in the receipt or payment of future known and uncertain cash amounts, the value of which are determined by interest rates. The Company’s derivative financial instruments are used to manage differences in the amount, timing, and duration of the Company’s known or expected cash receipts and its known or expected cash payments principally related to certain variable rate borrowings. Fair Values of Derivative Instruments on the Consolidated Balance Sheet The table below presents the fair value of the Company’s derivative financial instruments as well as their classification on the Consolidated Balance Sheet as of March 31, 2019 and September 30, 2018 (in thousands). Fair Values of Derivative Instruments Fair Values of Derivative Instruments Asset Derivatives Liability Derivatives As of March 31, 2019 As of September 30, 2018 As of March 31, 2019 As of Septenber 30, 2018 Notional Amount Balance Sheet Location Fair Value Balance Sheet Location Fair Value Balance Sheet Location Fair Value Balance Sheet Location Fair Value Derivatives designated as hedging instruments Derivatives designated as hedging instruments Interest Rate Products $ 100,000 Other Assets $ 1,355 Other Assets $ 2,595 Interest Rate Products Other Liabilities $ 244 Other Liabilities $ — Total derivatives designated as hedging instruments $ 1,355 $ 2,595 Total derivatives designated as hedging instruments $ 244 $ — Cash Flow Hedges of Interest Rate Risk The Company’s objectives in using interest rate derivatives are to add stability to interest income and expense and to manage its exposure to interest rate movements. To accomplish this objective, the Company has entered into interest rate swaps as part of its interest rate risk management strategy. These interest rate swaps are designated as cash flow hedges and involve the receipt of variable rate amounts from a counterparty in exchange for the Company making fixed payments. As of March 31, 2019, the Company had four interest rate swaps with a notional principal amount of $100.0 million associated with the Company’s cash outflows associated with various 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 March 31, 2019 and September 30, 2018. Amounts reported in accumulated other comprehensive loss related to derivatives that will be reclassified to interest income/expense as interest payments are made/received on the Company’s variable-rate assets/liabilities. During the three months ended March 31, 2019 and 2018, the Company had $271,000 and $76,000 respectively, of gains reclassified to interest expense. During the six months ended March 31, 2019 and 2018, the Company had $488,000 and $99,000 respectively, of gains reclassified to interest expense. During the next twelve months, the Company estimates that $739,000 will be reclassified as a decrease in interest expense. The tables below presents the effect of the Company’s cash flow hedge accounting on Accumulated Other Comprehensive Income for the three and six month periods ended March 31, 2019 and 2018 (in thousands). The Effect of Fair Value and Cash Flow Hedge Accounting on Accumulated Other Comprehensive Income Derivatives in Hedging Relationships Gain (Loss) Recognized in OCI on Derivative (Effective Portion) Three Months Ended March 31, Gain (Loss)Reclassified from Accumulated OCI into Income (Effective Portion) Three Months Ended March 31, Derivatives in Cash Flow Hedging Relationships 2019 2018 Location of Gain Reclassified from Accumulated OCI into Income 2019 2018 Interest Rate Products $ (609 ) $ 738 Interest expense $ 271 $ 76 Total $ (609 ) $ 738 $ 271 $ 76 Derivatives in Cash Flow Hedging Relationships Gain (Loss) Recognized in OCI on Derivative (Effective Portion) Six Months Ended March 31, Location of Gain or (Loss) Reclassified from Accumulated OCI into Income (Effective Portion) Gain (Loss)Reclassified from Accumulated OCI into Income (Effective Portion) Six Months Ended March 31, 2019 2018 2019 2018 Interest Rate Products $ (1,550 ) $ 1,195 Interest expense $ 488 $ 99 Total $ (1,550 ) $ 1,195 $ 488 $ 99 The table below presents the effect of the Company’s derivative financial instruments on Consolidated Statement of Operations for the three and six months ended March 31, 2019 and 2018. Location and Amount of Gain Recognized in Income on Fair Value and Cash Flow Hedging Relationships Three months ended March 31, 2019 Three months ended March 31, 2018 Interest Income (Expense) Other Income (Expense) Interest Income (Expense) Other Income (Expense) Total amounts of income and expense line items presented in the consolidated statement of operations in which the effects of fair value or cash flow hedges are recorded $ 271 $ — $ 76 $ — 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 $ 271 $ — $ 76 $ — Location and Amount of Gain Recognized in Income on Fair Value and Cash Flow Hedging Relationships Six months ended March 31, 2019 Six months ended March 31, 2018 Interest Income (Expense) Other Income (Expense) Interest Income (Expense) Other Income (Expense) Total amounts of income and expense line items presented in the consolidated statement of operations in which the effects of fair value or cash flow hedges are recorded $ 488 $ — $ 99 $ — 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 $ 488 $ — $ 99 $ — The table below presents a gross presentation, the effects of offsetting, and a net presentation of the Company’s derivatives for the periods ended March 31, 2019 and 2018. 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 Consolidated Balance Sheet. There were no derivative liabilities for the periods ended March 31, 2019 and September 30, 2018. Offsetting of Derivative Assets as of March 31, 2019 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 $ 1,355 $ — $ 1,355 $ (244 ) $ 1,111 $ — Offsetting of Derivative Liabilities as of March 31, 2019 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 Liabilities presented in the Statement of Financial Position Financial Instruments Cash Collateral Received Net Amount Derivatives $ 244 $ — $ 244 $ (244 ) $ — $ — 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 Credit-risk-related Contingent Features The Company has agreements with its derivative counterparties that contain a provision where if the Company defaults on any of its indebtedness, including default where repayment of the indebtedness has not been accelerated by the lender, then the Company could also be declared in default on its derivative obligations. The Company also has agreements with certain of its derivative counterparties that contain a provision where if the Company fails to maintain its status as a well / adequately capitalized institution, then the counterparty could terminate the derivative positions and the Company would be required to settle its obligations under the agreements. As of March 31, 2019, and September 30, 2018, the Company had no derivatives in a net liability position and was not required to post collateral against its obligations under these agreements. If the Company had breached any of these provisions at March 31, 2019 and 2018, it could have been required to settle its obligations under the agreements at the termination value.

Contingent Liabilities

Contingent Liabilities	6 Months Ended
	Mar. 31, 2019
Commitments And Contingencies Disclosure [Abstract]
Contingent Liabilities	13. Contingent Liabilities Legal Proceedings The Company and its subsidiaries are subject to various legal actions arising in the normal course of business. In the opinion of Management, the resolution of these legal actions is not expected to have a material adverse effect on the Company’s results of operations. The Bank was named as a defendant in an action commenced on December 8, 2016 by one plaintiff who will also seek to pursue this action as a class action on behalf of the entire class of people similarly situated. The plaintiff alleges that a bank previously acquired by ESSA Bancorp 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 district court granted the Bank’s motion to dismiss the case. The plaintiff appealed the court’s ruling. In an opinion and order dated April 26, 2019, the appellate court reversed the district court’s order dismissing the plaintiff’s case against the Bank, and remanded the case back to the district court in order to continue the litigation. The Bank will continue to vigorously defend against such allegations. To the extent that pending or threatened litigation could result in exposure to the Bank, the amount of such exposure is not currently estimable.

Revenue Recognition

Revenue Recognition	6 Months Ended
	Mar. 31, 2019
Revenue From Contract With Customer [Abstract]
Revenue Recognition	14. Revenue Recognition Effective October 1, 2018, the Company adopted ASU 2014-09 Revenue from Contracts with Customers- Topic 606 Management determined that since the guidance does not apply to revenue associated with financial instruments, including loans and securities that are accounted for under other GAAP, the new guidance did not have a material impact on revenue most closely associated with financial instruments including interest income and expense along with non interest revenue resulting from non interest security gains, loan servicing, commitment fees and fees from financial guarantees. As a result, no changes were made during the period related to these sources of revenue which cumulatively comprise 90.3% of the total revenue of the Company. The main types of non interest income within the scope of the standard are: Trust and Investment Fees Trust and asset management income is primarily comprised of fees earned from the management and administration of trusts and other customer assets. The Company’s performance obligation is generally satisfied over time and the resulting fees are recognized monthly, based upon the month-end market value of the assets under management and the applicable fee rate. Payment is generally received a few days after month end through a direct charge to customer’s accounts. The Company does not earn performance-based incentives. Optional services such as real estate sales and tax return preparation services are also available to existing trust and asset management customers. The Company’s performance obligation for these transactional-based services is generally satisfied, and related revenue recognized, at a point in time (i.e. as incurred). Payment is received shortly after services are rendered. Service Charges on Deposit Accounts Service charges on deposit accounts consist of account analysis fees (i.e. net fees earned on analyzed business and public checking accounts), monthly service fees, check orders, and other deposit account related fees. The Company’s performance obligation for account analysis fees and monthly service fees is generally satisfied, and the related revenue recognized, over the period in which the service is provided. Check orders and other deposit account related fees are largely transactional based, and therefore, the Company’s performance obligation is satisfied, and related revenue recognized, at a point in time. Payment for service charges on deposit accounts is primarily received immediately or in the following month through a direct charge to customers’ accounts. Fees, Exchange, and Other Service Charges Fees, interchange, and other service charges are primarily comprised of debit card income, ATM fees, cash management income, and other services charges. Debit card income is primarily comprised of interchange fees earned whenever the Company’s debit cards are processed through card payment networks such as Mastercard. ATM fees are primarily generated when a Company cardholder uses a non-Company ATM or a non-Company cardholder uses a company ATM. Other service charges include revenue from processing wire transfers, bill pay service, cashier’s checks, and other services. The Company’s performance obligation for fees, exchange, and other service charges are largely satisfied, and related revenue recognized when the services are rendered or upon completion., Payment is typically received immediately or in the following month. Insurance Commissions Insurance income primarily consists of commissions received on product sales. The Company acts as an intermediary between the Company’s customer and the insurance carrier. The Company’s performance obligation is generally satisfied upon the issuance of the policy. Shortly after the policy is issued, the carrier remits the commission payment to the Company, and the Company recognizes the revenue.

Accounting Pronouncements (Poli

Accounting Pronouncements (Policies)	6 Months Ended
	Mar. 31, 2019
Accounting Changes And Error Corrections [Abstract]
Adoption of New Standards and Recent Accounting Pronouncements	Adoption of New Standards In May 2014, the FASB issued ASU No. 2014-09, “Revenue from contracts with customers.” In January 2016, the FASB issued ASU No. 2016-01, “Recognition and Measurement of Financial Assets and Financial Liabilities.” Fair Value Investment Securities In March 2017, the FASB issued ASU 2017-07, Compensation—Retirement Benefits (Topic 715) Recent Accounting Pronouncements In February 2016, the FASB issued ASU 2016-02, Leases (Topic 842) In June 2016, the FASB issued ASU 2016-13, Financial Instruments - Credit Losses: Measurement of Credit Losses on Financial Instruments In Simplifying the Test for Goodwill Impairment In March 2017, the FASB issued ASU 2017-08, Receivables – Nonrefundable Fees and Other Costs (Subtopic 310-20). 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 Leases (Topic 842) In June 2018, the FASB issued ASU 2018-07, Compensation – Stock Compensation (Topic 718) In July 2018, the FASB issued ASU 2018-09, Codification Improvements 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 Compensation – Retirement Benefits (Topic 715-20). In October 2018, the FASB issued ASU 2018-16 , Derivatives and Hedging (Topic 815) In November 2018, the FASB issued ASU 2018-19, Codification Improvements to Topic 326, Financial Instruments - Credit Losses, Leases In December 2018, the FASB issued ASU 2018-20, Leases (Topic 842), Leases In March 2019, the FASB issued ASU 2019-01, Leases (Topic 842): Codification Improvements, 1) determining the fair value of the underlying asset by the lessor that are not manufacturers or dealers (generally financial institutions and captive finance companies), and 2) lessors that are depository and lending institutions should classify principal and payments received under sales-type and direct financing leases In April 2019, the FASB issued ASU 2019-04, Codification Improvements to Topic 326, Financial Instruments – Credit Losses, Topic 815, Derivatives and Hedging, and Topic 825, Financial Instruments, w

Earnings per Share (Tables)

Earnings per Share (Tables)	6 Months Ended
	Mar. 31, 2019
Earnings Per Share [Abstract]
Composition of the Weighted-Average Common Shares (Denominator) Used in the Basic and Diluted Earnings Per Share Computation	The following table sets forth the composition of the weighted-average common shares (denominator) used in the basic and diluted earnings per share computation for the three and six months periods ended March 31, 2019 and 2018. Three Months Ended Six Months Ended March 31, March 31, March 31, March 31, 2019 2018 2019 2018 Weighted-average common shares outstanding 18,133,095 18,133,095 18,133,095 18,133,095 Average treasury stock shares (6,458,020 ) (6,459,392 ) (6,386,412 ) (6,490,961 ) Average unearned ESOP shares (797,738 ) (843,010 ) (803,457 ) (848,729 ) Average unearned non-vested shares (51,711 ) (34,340 ) (52,039 ) (44,318 ) Weighted average common shares and common stock equivalents used to calculate basic earnings per share 10,825,626 10,796,353 10,891,187 10,749,087 Additional common stock equivalents (non-vested stock) used to calculate diluted earnings per share — 347 — 143 Additional common stock equivalents (stock options) used to calculate diluted earnings per share — 25,409 31,149 Weighted average common shares and common stock equivalents used to calculate diluted earnings per share 10,825,626 10,822,109 10,891,187 10,780,379

Investment Securities (Tables)

Investment Securities (Tables)	6 Months Ended
	Mar. 31, 2019
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): March 31, 2019 Amortized Cost Gross Unrealized Gains Gross Unrealized Losses Fair Value Available for Sale Fannie Mae $ 145,081 $ 396 $ (2,097 ) $ 143,380 Freddie Mac 88,859 65 (1,370 ) 87,554 Governmental National Mortgage Association Securities 20,142 18 (455 ) 19,705 Total mortgage-backed securities 254,082 479 (3,922 ) 250,639 Obligations of states and political subdivisions 24,454 235 (321 ) 24,368 U.S. government agency securities 8,064 158 (14 ) 8,208 Corporate obligations 47,915 213 (766 ) 47,362 Other debt securities 18,613 4 (577 ) 18,040 Total $ 353,128 $ 1,089 $ (5,600 ) $ 348,617 September 30, 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 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 (a) 25 — (5 ) 20 Total $ 385,831 $ 388 $ (14,781 ) $ 371,438 (a) As of October 1, 2018, the Company adopted ASU 2016-01 resulting in reclassification of equity securities from available for-sale investment securities to other assets. At September 30, 2018, the Company's investment in equity securities was comprised of common stock issued by an unrelated bank holding company.
Summary of Unrealized and Realized Gains Losses Recognized in Net Income on Equity Securities	(Dollars in thousands) Three months ended March 31, 2019 Six months ended March 31, 2019 Net gains and (losses) recognized during the period on equity securities $ 3 $ 1 Less: Net gains and (losses) recognized during the period on equity securities sold during the period — — Unrealized gains and (losses) recognized during the reporting period on equity securities still held at the reporting date $ 3 $ 1
Schedule of Amortized Cost and Fair Value of Debt Securities by Contractual Maturity	The amortized cost and fair value of debt securities at March 31, 2019, 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 $ — $ — Due after one year through five years 28,061 28,124 Due after five years through ten years 95,084 94,171 Due after ten years 229,983 226,322 Total $ 353,128 $ 348,617
Schedule of Gross Unrealized Losses and Fair Value	The following tables show the Company’s gross unrealized losses and fair value, aggregated by investment category and length of time that the individual securities have been in a continuous unrealized loss position (dollars in thousands): March 31, 2019 Number of Securities Less than Twelve Months Twelve Months or Greater Total Fair Value Gross Unrealized Losses Fair Value Gross Unrealized Losses Fair Value Gross Unrealized Losses Fannie Mae 84 $ 2,718 $ (22 ) $ 102,134 $ (2,075 ) $ 104,852 $ (2,097 ) Freddie Mac 63 — — 75,176 (1,370 ) 75,176 (1,370 ) Governmental National Mortgage Association 16 809 (17 ) 16,534 (438 ) 17,343 (455 ) Obligations of states and political subdivisions 15 — 0 15,753 (321 ) 15,753 (321 ) U.S. government agency securities 1 — — 1,949 (14 ) 1,949 (14 ) Corporate obligations 32 10,896 (103 ) 20,187 (663 ) 31,083 (766 ) Other debt securities 19 1,184 (19 ) 15,789 (558 ) 16,973 (577 ) Total 230 $ 15,607 $ (161 ) $ 247,522 $ (5,439 ) $ 263,129 $ (5,600 ) September 30, 2018 Number of Securities Less than Twelve Months Twelve Months or Greater Total Fair Value Gross Unrealized Losses Fair Value Gross Unrealized Losses Fair Value Gross Unrealized Losses Fannie Mae 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 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 (a) 1 20 (5 ) — 0 20 (5 ) Total 276 $ 138,094 $ (3,047 ) $ 203,329 $ (11,734 ) $ 341,423 $ (14,781 ) (a) As of October 1, 2018, the Company adopted ASU 2016-01 resulting in reclassification of equity securities from available for-sale investment securities to other assets. As September 30, 2018, the Company's investment in equity securities was comprised of common stock issued by an unrelated bank holding company.

Loans Receivable, Net and All_2

Loans Receivable, Net and Allowance for Loan Losses (Tables)	6 Months Ended
	Mar. 31, 2019
Receivables [Abstract]
Summary of Loans Receivable	Loans receivable consist of the following (in thousands): March 31, 2019 September 30, 2018 Real estate loans: Residential $ 595,116 $ 580,561 Construction 6,399 3,920 Commercial 458,292 416,573 Commercial 58,720 49,479 Obligations of states and political subdivisions 70,549 73,362 Home equity loans and lines of credit 43,668 43,962 Auto Loans 111,899 146,220 Other 2,943 2,682 1,347,586 1,316,759 Less allowance for loan losses 12,389 11,688 Net loans $ 1,335,197 $ 1,305,071
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): March 31, 2019 September 30, 2018 Acquired Loans with Specific Evidence or Deterioration in Credit Quality (ASC 310-30) Acquired Loans with Specific Evidence or Deterioration in Credit Quality (ASC 310-30) Outstanding balance $ 1,593 $ 2,497 Carrying amount $ 1,486 $ 1,802
Schedule of Loans Evaluated for Impairment	The following tables show the amount of loans in each category that were individually and collectively evaluated for impairment at the dates indicated (in thousands): Total Loans Individually Evaluated for Impairment Loans Acquired with Deteriorated Credit Quality Collectively Evaluated for Impairment March 31, 2019 Real estate loans: Residential $ 595,116 $ 4,311 $ — $ 590,805 Construction 6,399 — — 6,399 Commercial 458,292 2,075 1,486 454,731 Commercial 58,720 551 — 58,169 Obligations of states and political subdivisions 70,549 — — 70,549 Home equity loans and lines of credit 43,668 256 — 43,412 Auto loans 111,899 500 — 111,399 Other 2,943 16 — 2,927 Total $ 1,347,586 $ 7,709 $ 1,486 $ 1,338,391 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 sub divisions 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
Schedule of Investment and Unpaid Principal Balances for Impaired Loans	The following tables include the recorded investment and unpaid principal balances for impaired loans with the associated allowance amount at the dates indicated, if applicable (in thousands): Recorded Investment Unpaid Principal Balance Associated Allowance March 31, 2019 With no specific allowance recorded: Real estate loans Residential $ 3,315 $ 4,615 $ — Construction — — — Commercial 1,811 2,534 — Commercial 454 608 — Obligations of states and political subdivisions — — — Home equity loans and lines of credit 238 275 — Auto loans 136 216 — Other 16 23 — Total 5,970 8,271 — With an allowance recorded: Real estate loans Residential 996 1,227 144 Construction — — — Commercial 264 297 65 Commercial 97 100 88 Obligations of states and political subdivisions — — — Home equity loans and lines of credit 18 18 6 Auto loans 364 469 149 Other — — — Total 1,739 2,111 452 Total: Real estate loans Residential 4,311 5,842 144 Construction — — — Commercial 2,075 2,831 65 Commercial 551 708 88 Obligations of states and political subdivisions — — — Home equity loans and lines of credit 256 293 6 Auto loans 500 685 149 Other 16 23 — Total Impaired Loans $ 7,709 $ 10,382 $ 452 Recorded Investment Unpaid Principal Balance Associated Allowance September 30, 2018 With no specific allowance recorded: Real Estate Loans Residential $ 4,449 $ 6,176 $ — Construction — — — Commercial 5,892 6,790 — Commercial 85 349 — Obligations of states and political subdivisions — — — Home equity loans and lines of credit 114 138 — Auto Loans 87 223 — Other 17 25 — Total 10,644 13,701 — With an allowance recorded: Real Estate Loans Residential 868 938 149 Construction — — — Commercial — — — Commercial — — — Obligations of states and political subdivisions — — — Home equity loans and lines of credit — — — Auto Loans 358 375 164 Other — — — Total 1,226 1,313 313 Total: Real Estate Loans Residential 5,317 7,114 149 Construction — — — Commercial 5,892 6,790 — Commercial 85 349 — Obligations of states and political subdivisions — — — Home equity loans and lines of credit 114 138 — Auto Loans 445 598 164 Other 17 25 — Total Impaired Loans $ 11,870 $ 15,014 $ 313 The following tables represent the average recorded investments in the impaired loans and the related amount of interest recognized during the time within the period that the impaired loans were impaired (in thousands): For the Three Months Ended March 31, 2019 2018 2019 2018 Average Recorded Investment Average Recorded Investment Interest Income Recognized Interest Income Recognized With no specific allowance recorded: Real estate loans Residential $ 3,567 $ 4,180 $ — $ 6 Construction — — — — Commercial 1,934 6,789 8 69 Commercial 207 1,178 1 24 Obligations of states and political subdivisions — — — — Home equity loans and lines of credit 229 203 — — Auto loans 85 208 1 — Other 16 28 — — Total 6,038 12,586 10 99 With an allowance recorded: Real estate loans Residential 1,151 1,256 — — Construction — — — — Commercial 88 19 — — Commercial 32 — — — Obligations of states and political subdivisions — — — — Home equity loans and lines of credit 33 12 — — Auto loans 250 231 — — Other — — — — Total 1,554 1,518 — — Total: Real estate loans Residential 4,718 5,436 — 6 Construction — — — — Commercial 2,022 6,808 8 69 Commercial 239 1,178 1 24 Obligations of states and political subdivisions — — — — Home equity loans and lines of credit 262 215 — — Auto loans 335 439 1 — Other 16 28 — — Total Impaired Loans $ 7,592 $ 14,104 $ 10 $ 99 For the Six Months Ended March 31, 2019 2018 2019 2018 Average Recorded Investment Average Recorded Investment Interest Income Recognized Interest Income Recognized With no specific allowance recorded: Real estate loans Residential $ 3,867 $ 4,305 $ 3 $ 16 Construction — — — — Commercial 3,209 6,897 54 141 Commercial 145 1,233 1 51 Obligations of states and political subdivisions — — — — Home equity loans and lines of credit 190 205 — 1 Auto loans 86 172 1 1 Other 17 29 — — Total 7,514 12,841 59 210 With an allowance recorded: Real estate loans Residential 983 1,392 — — Construction — — — — Commercial 44 19 — — Commercial 16 — — — Obligations of states and political subdivisions — — — — Home equity loans and lines of credit 23 7 — — Auto loans 227 247 — 0 Other — — — — Total 1,293 1,665 — 0 Total: Real estate loans Residential 4,850 5,697 3 16 Construction — — — — Commercial 3,253 6,916 54 141 Commercial 161 1,233 1 51 Obligations of states and political subdivisions — — — — Home equity loans and lines of credit 213 212 — 1 Auto loans 313 419 1 1 Other 17 29 — — Total Impaired Loans $ 8,807 $ 14,506 $ 59 $ 210
Classes of the Loan Portfolio, Internal Risk Rating System	The following tables present the classes of the loan portfolio summarized by the aggregate Pass and the criticized categories of Special Mention, Substandard, and Doubtful or Loss within the internal risk rating system at March 31, 2019 and September 30, 2018 (in thousands): Pass Special Mention Substandard Doubtful or Loss Total March 31, 2019 Commercial real estate loans $ 438,820 $ 9,149 $ 10,323 $ — $ 458,292 Commercial 57,744 6 970 — 58,720 Obligations of states and political subdivisions 70,549 — — — 70,549 Total $ 567,113 $ 9,155 $ 11,293 $ — $ 587,561 Pass Special Mention Substandard Doubtful or Loss 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
Schedule of Performing or Nonperforming Loans	The following tables present the risk ratings in the consumer categories of performing and non-performing loans at March 31, 2019 and September 30, 2018 (in thousands): Performing Non- performing Purchased Credit Impaired Total March 31, 2019 Real estate loans: Residential $ 590,647 $ 4,469 $ — $ 595,116 Construction 6,399 — — 6,399 Home equity loans and lines of credit 43,280 388 — 43,668 Auto loans 111,220 679 — 111,899 Other 2,909 34 — 2,943 Total $ 754,455 $ 5,570 $ — $ 760,025 Performing Non- performing Purchased Impaired Credit 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
Classes of the Loan Portfolio Summarized by the Aging Categories	The following tables present the classes of the loan portfolio summarized by the aging categories of performing loans and nonaccrual loans as of March 31, 2019 and September 30, 2018 (in thousands): 31-60 Days 61-89 Days 90 + Days Past Due and Total Purchased Credit Impaired Total Current Past Due Past Due Accruing Non­accrual Past Due Accruing Non­accrual Loans March 31, 2019 Real estate loans: Residential $ 588,638 $ 1,283 $ 726 $ — $ 4,469 $ 6,478 $ — $ — $ 595,116 Construction 6,399 — — — — — — — 6,399 Commercial 455,031 70 — — 1,921 1,991 249 1,021 458,292 Commercial 57,818 37 21 — 628 686 — 216 58,720 Obligations of states and political subdivisions 70,549 — — — — — — — 70,549 Home equity loans and lines of credit 43,145 129 6 — 388 523 — — 43,668 Auto loans 109,914 1,280 26 — 679 1,985 — — 111,899 Other 2,881 16 12 — 34 62 — — 2,943 Total $ 1,334,375 $ 2,815 $ 791 $ — $ 8,119 $ 11,725 $ 249 $ 1,237 $ 1,347,586 31-60 Days 61-89 Days 90 + Days Past Due and Total Purchased Credit Impaired Total Current Past Due Past Due Accruing Non­accrual Past Due Accruing Non­accrual Loans September 30, 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
Summary of Primary Segments of ALL	The following table summarizes changes in the primary segments of the ALL for the three and six months periods ended March 31, 2019 and 2018 (in thousands): Home Obligations of Equity States and Loans and Real Estate Loans Commercial Political Lines of Other Residential Construction Commercial Loans Subdivisions Credit Auto Loans Loans Unallocated Total ALL balance at December 31, 2018 $ 3,745 $ 43 $ 3,496 $ 1,704 $ 295 $ 298 $ 1,694 $ 26 $ 920 $ 12,221 Charge-offs (131 ) — (7 ) — — (19 ) (370 ) (11 ) — (538 ) Recoveries 3 — 12 — — 2 88 1 — 106 Provision 125 16 315 161 (1 ) 14 196 11 (237 ) 600 ALL balance at March 31, 2019 $ 3,742 $ 59 $ 3,816 $ 1,865 $ 294 $ 295 $ 1,608 $ 27 $ 683 $ 12,389 ALL balance at December 31, 2017 $ 3,769 $ 33 $ 2,319 $ 1,054 $ 213 $ 449 $ 1,962 $ 21 $ 13 $ 9,833 Charge-offs (52 ) — (14 ) (5 ) — (6 ) (550 ) (15 ) — (642 ) Recoveries 3 — — — — 3 211 2 — 219 Provision 35 0 516 170 56 (45 ) 281 13 74 1,100 ALL balance at March 31, 2018 $ 3,755 $ 33 $ 2,821 $ 1,219 $ 269 $ 401 $ 1,904 $ 21 $ 87 $ 10,510 ALL balance at September 30, 2018 $ 3,605 $ 35 $ 3,458 $ 1,462 $ 323 $ 296 $ 1,859 $ 23 $ 627 $ 11,688 Charge-offs (273 ) — (7 ) (22 ) — (19 ) (738 ) (11 ) — (1,070 ) Recoveries 9 — 12 — — 3 269 2 — 295 Provision 401 24 353 425 (29 ) 15 218 13 56 1,476 ALL balance at March 31, 2019 $ 3,742 $ 59 $ 3,816 $ 1,865 $ 294 $ 295 $ 1,608 $ 27 $ 683 $ 12,389 ALL balance at September 30, 2017 $ 3,878 $ 23 $ 1,758 $ 987 $ 248 $ 470 $ 1,836 $ 21 $ 144 $ 9,365 Charge-offs (95 ) — (15 ) (137 ) — (6 ) (1,087 ) (21 ) — (1,361 ) Recoveries 6 — 2 10 — 5 381 2 — 406 Provision (34 ) 10 1,076 359 21 (68 ) 774 19 (57 ) 2,100 ALL balance at March 31, 2018 $ 3,755 $ 33 $ 2,821 $ 1,219 $ 269 $ 401 $ 1,904 $ 21 $ 87 $ 10,510 During the three months ended March 31, 2018 the Company recorded provision expense for the construction loans, commercial real estate, commercial, obligations of states and political subdivisions, auto and other loan segments. Credit provisions were recorded for the residential real estate and home equity loans and line of credit segments. During the three and six months ended March 31, 2019 the Company recorded provision expense for the residential real estate, construction loans, commercial real estate, commercial, home equity loans and lines of credit, 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 obligations of states and political subdivisions segment. During the six months ended March 31, 2018 the Company recorded provision expense for the residential real estate, construction loans, commercial real estate, commercial, 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. The following table summarizes the primary segments of the ALL, segregated into two categories, the amount required for loans individually evaluated for impairment and the amount required for loans collectively evaluated for impairment as of March 31, 2019 and September 30, 2018 (in thousands): Home Obligations of Equity States and Loans and Real Estate Loans Commercial Political Lines of Other Residential Construction Commercial Loans Subdivisions Credit Auto Loans Loans Unallocated Total Individually evaluated for impairment $ 144 $ — $ 65 $ 88 $ — $ 6 $ 149 $ — $ — $ 452 Collectively evaluated for impairment 3,598 59 3,751 1,777 294 289 1,459 27 683 11,937 ALL balance at March 31, 2019 $ 3,742 $ 59 $ 3,816 $ 1,865 $ 294 $ 295 $ 1,608 $ 27 $ 683 $ 12,389 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
Summary of Troubled Debt Restructuring Granted	The following is a summary of troubled debt restructuring granted during the three months ended March 31, 2018 and the six months ended March 31, 2019 and 2018 (dollars in thousands): For the Three Months Ended March 31, 2018 Number of Contracts Pre-Modification Outstanding Recorded Investment Post-Modification Outstanding Recorded Investment Troubled Debt Restructurings Real estate loans: Residential — $ — $ — Construction — — — Commercial 1 107 107 Commercial — — — Obligations of states and political subdivisions — — — Home equity loans and lines of credit — — — Auto loans 1 15 15 Other — — — Total 2 $ 122 $ 122 For the Six Months Ended March 31, 2019 Number of Contracts Pre-Modification Outstanding Recorded Investment Post-Modification Outstanding Recorded Investment Troubled Debt Restructurings Real estate loans: Residential 2 $ 95 $ 95 Construction — — — Commercial — — — Commercial — — — Obligations of states and political subdivisions — — — Home equity loans and lines of credit 2 159 159 Auto loans 1 21 21 Other — — — Total 5 $ 275 $ 275 For the Six Months Ended March 31, 2018 Number of Contracts Pre-Modification Outstanding Recorded Investment Post-Modification Outstanding Recorded Investment Troubled Debt Restructurings Real estate loans: Residential 2 $ 243 $ 235 Construction — — — Commercial 1 107 107 Commercial — — — Obligations of states and political subdivisions — — — Home equity loans and lines of credit — — — Auto loans 1 15 15 Other — — — Total 4 $ 365 $ 357

Deposits (Tables)

Deposits (Tables)	6 Months Ended
	Mar. 31, 2019
Banking And Thrift [Abstract]
Schedule of Deposits by Major Classifications	Deposits consist of the following major classifications (in thousands): March 31, 2019 September 30, 2018 Non-interest bearing demand accounts $ 167,948 $ 158,340 Interest bearing demand accounts 178,593 221,327 Money market accounts 327,906 296,078 Savings and club accounts 136,875 135,862 Certificates of deposit 482,561 525,248 Total $ 1,293,883 $ 1,336,855

Net Periodic Benefit Cost-Def_2

Net Periodic Benefit Cost-Defined Benefit Plan (Tables)	6 Months Ended
	Mar. 31, 2019
Compensation And Retirement Disclosure [Abstract]
Summary of the Components of Net Periodic Benefit Cost	The following table comprises the components of net periodic benefit cost for the three and six month periods ended March 31, 2019 and 2018 (in thousands): For the Three Months Ended March 31, For the Six Months Ended March 31, 2019 2018 2019 2018 Service Cost $ — $ — $ — $ — Interest Cost 173 175 347 349 Expected return on plan assets (293 ) (299 ) (586 ) (597 ) Amortization of unrecognized loss — — — — Net periodic benefit cost $ (120 ) $ (124 ) $ (239 ) $ (248 )

Equity Incentive Plan (Tables)

Equity Incentive Plan (Tables)	6 Months Ended
	Mar. 31, 2019
Postemployment Benefits [Abstract]
Schedule of Restricted Stock Option Activity	The following is a summary of the status of the Company’s restricted stock as of March 31, 2019, and changes therein during the six month period then ended: Number of Restricted Weighted- average Grant Date Fair Value Nonvested at September 30, 2018 35,072 $ 15.37 Granted 37,236 16.23 Vested (11,625 ) 15.95 Forfeited (5,120 ) 15.87 Nonvested at March 31, 2019 55,563 $ 15.93

Fair Value (Tables)

Fair Value (Tables)	6 Months Ended
	Mar. 31, 2019
Fair Value Disclosures [Abstract]
Schedule of Fair Value For Assets Required to be Measured and Reported at Fair Value on a Recurring Basis	The following tables provide the fair value for assets required to be measured and reported at fair value on a recurring basis on the Consolidated Balance Sheet as of March 31, 2019 and September 30, 2018 by level within the fair value hierarchy (in thousands). Recurring Fair Value Measurements at Reporting Date March 31, 2019 Level I Level II Level III Total Investment securities available for sale: Mortgage backed securities $ — $ 250,639 $ — $ 250,639 Obligations of states and political subdivisions — 24,368 — 24,368 U.S. government agencies — 8,208 — 8,208 Corporate obligations — 39,629 7,733 47,362 Other debt securities — 18,040 — 18,040 Total Debt Securities $ — $ 340,884 $ 7,733 $ 348,617 Equity securities- financial services $ 21 $ — $ — $ 21 Derivatives and hedging activities: — 1,143 — 1,143 September 30, 2018 Level I Level II Level III Total 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 agencies — 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
Schedule of Changes in Fair Value of Level III Investments	The following tables present a summary of changes in the fair value of the Company’s Level III investments for the three and six month periods ended March 31, 2019 and 2018 (in thousands). Fair Value Measurement Using Significant Unobservable Inputs (Level III) Three Months Ended March 31, 2019 March 31, 2018 Beginning balance $ 7,642 $ 7,826 Purchases, sales, issuances, settlements, net — — Total unrealized gain (loss): Included in earnings — — Included in other comprehensive income (loss) 91 (59 ) Transfers in and/or out of Level III — — $ 7,733 $ 7,767 Fair Value Measurement Using Significant Unobservable Inputs (Level III) Six Months Ended March 31, 2019 March 31, 2018 Beginning balance $ 7,738 $ 7,224 Purchases, sales, issuances, settlements, net — 500 Total unrealized gain (loss): Included in earnings — — Included in other comprehensive (loss) income (5 ) 43 Transfers in and/or out of Level III — — $ 7,733 $ 7,767
Schedule of Fair Value For Assets Required to be Measured and Reported at Fair Value on a Nonrecurring Basis	The following tables provide the fair value for assets required to be measured and reported at fair value on a non recurring basis on the Consolidated Balance Sheet as of March 31, 2019 and September 30, 2018 by level within the fair value hierarchy: Non-Recurring Fair Value Measurements at Reporting Date (in thousands) March 31, 2019 Level I Level II Level III Total Foreclosed real estate $ — $ — $ 665 $ 665 Impaired loans — — 7,257 7,257 September 30, 2018 Level I Level II Level III Total Foreclosed real estate $ — $ — $ 1,141 $ 1,141 Impaired loans — — 11,557 11,557
Summary of Additional Quantitative Information about Assets Measured at Fair Value on a Nonrecurring Basis	The following tables present additional quantitative information about assets measured at fair value on a nonrecurring basis and for which the Company has utilized Level 3 inputs to determine fair value: Quantitative Information about Level 3 Fair Value Measurements (dollars in thousands) Fair Value Estimate Valuation Techniques Unobservable Input Range March 31, 2019 Impaired loans $ 7,257 Appraisal of collateral (1) Appraisal adjustments (2) 0% to 35% (20.8%) Foreclosed real estate owned 665 Appraisal of collateral (1), (3) Appraisal adjustments (2) 20% to 46% (26.8%) Quantitative Information about Level 3 Fair Value Measurements (dollars in thousands) Fair Value Estimate Valuation Techniques Unobservable Input Range September 30, 2018 Impaired loans $ 11,557 Appraisal of collateral (1) Appraisal adjustments (2) 0% to 57% (24.0%) Foreclosed real estate owned 1,141 Appraisal of collateral (1), (3) 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 3 inputs which are not identifiable. (2) Appraisals may be adjusted by management for qualitative factors such as economic conditions and estimated liquidation expenses. The range of liquidation expenses and other appraisal adjustments are presented as a percent of the appraisal.
Schedule of Assets and Liabilities not Required to be Measured and Reported at Fair Value	The methods and assumptions used by the Company in estimating fair values of financial instruments at March 31, 2019 is in accordance with ASC Topic 825, Financial Instruments March 31, 2019 (in thousands) Carrying Level I Level II Level III Total Fair Value Financial assets: Cash and cash equivalents $ 41,159 $ 41,159 $ — $ — $ 41,159 Certificates of deposit 250 — — 250 250 Loans receivable, net 1,335,197 — — 1,307,305 1,307,305 Accrued interest receivable 7,038 7,038 — — 7,038 Regulatory stock 14,633 14,633 — — 14,633 Mortgage servicing rights 210 — — 323 323 Bank owned life insurance 39,114 39,114 — — 39,114 Financial liabilities: Deposits $ 1,293,883 $ 811,322 $ — $ 480,401 $ 1,291,723 Short-term borrowings 198,293 198,293 — — 198,293 Other borrowings 139,673 — — 139,594 139,594 Advances by borrowers for taxes and insurance 10,353 10,353 — — 10,353 Accrued interest payable 1,873 1,873 — — 1,873 September 30, 2018 (in thousands) Carrying 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 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 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

Accumulated Other Comprehensi_2

Accumulated Other Comprehensive Loss (Tables)	6 Months Ended
	Mar. 31, 2019
Equity [Abstract]
Summary of Activity in Accumulated Other Comprehensive Loss	The activity in accumulated other comprehensive loss for the three and six month periods ended March 31, 2019 and 2018 is as follows (in thousands): Accumulated Other Comprehensive Loss Defined Benefit Pension Plan Unrealized (Losses) on Securities Available for Sale Derivatives Total Balance at December 31, 2018 $ (477 ) $ (7,377 ) $ 1,192 (6,662 ) Other comprehensive income (loss) before reclassifications — 3,846 (267 ) 3,579 Amounts reclassified from accumulated other comprehensive loss — (31 ) (215 ) (246 ) Period change — 3,815 (482 ) 3,333 Balance at March 31, 2019 $ (477 ) $ (3,562 ) $ 710 $ (3,329 ) Balance at December 31, 2017 $ (628 ) $ (2,215 ) $ 1,087 $ (1,756 ) Other comprehensive income before reclassifications — (5,100 ) 587 (4,513 ) Amounts reclassified from accumulated other comprehensive loss — (57 ) (63 ) (120 ) Period change — (5,157 ) 524 (4,633 ) Reclassification of certain income tax effects from other comprehensive (loss) income (124 ) (436 ) 214 (346 ) Balance at March 31, 2018 $ (752 ) $ (7,808 ) $ 1,825 $ (6,735 ) Accumulated Other Comprehensive Income/(Loss) Defined Benefit Pension Plan Unrealized Gains (Losses) on Securities Available for Sale Derivatives Total Balance at September 30, 2018 $ (477 ) $ (11,369 ) $ 1,936 $ (9,910 ) Other comprehensive income (loss) before reclassifications — 7,837 (840 ) 6,997 Amounts reclassified from accumulated other comprehensive loss, net of tax — (34 ) (386 ) (420 ) Reclassification of certain income tax effects from accumulated other comprehensive loss — 4 — 4 Period change — 7,807 (1,226 ) 6,581 Balance at March 31, 2019 $ (477 ) $ (3,562 ) $ 710 $ (3,329 ) Balance at September 30, 2017 $ (628 ) $ (927 ) $ 801 $ (754 ) Other comprehensive income before reclassifications — (6,388 ) 888 (5,500 ) Amounts reclassified from accumulated other comprehensive loss — (57 ) (78 ) (135 ) Period change — (6,445 ) 810 (5,635 ) Reclassification of certain income tax effects from accumulated other comprehensive loss (124 ) (436 ) 214 (346 ) Balance at March 31, 2018 $ (752 ) $ (7,808 ) $ 1,825 $ (6,735 )
Summary of Reclassification Out of Accumulated Other Comprehensive Income (Loss)	The following table presents significant amounts reclassified out of each component of accumulated other comprehensive loss for the three and six month periods ended March 31, 2019 and 2018 (in thousands): Amount Reclassified from Accumulated Other Comprehensive Loss Details About Accumulated Other Comprehensive Loss Components Accumulated Other Comprehensive Loss for the Three Months Ended March 31, Affected Line Item in the Consolidated Statement of Income 2019 2018 Securities available for sale Net securities gains reclassified into earnings $ 39 $ 75 Gain on sale of investments, net Related income tax expense (8 ) (18 ) Income taxes Net effect on accumulated other comprehensive loss for the period 31 57 Derivatives and hedging activities: Interest expense, effective portion 271 76 Interest expense Related income tax expense (56 ) (13 ) Income taxes Net effect on accumulated other comprehensive loss for the period 215 63 Total reclassification for the period $ 246 $ 120 Amount Reclassified from Accumulated Other Comprehensive Loss Accumulated Other Comprehensive Loss For the Six Months Ended March 31, Affected Line Item in the Consolidated Statement of Income 2019 2018 Securities available for sale: Net securities gains reclassified into earnings $ 43 $ 75 Gain on sale of investments, net Related income tax expense (9 ) (18 ) Income taxes Net effect on accumulated other comprehensive loss for the period 34 57 Net of tax Derivative and Hedging Activities: Interest expense, effective portion 488 99 Interest expense Related income tax expense (102 ) (21 ) Income taxes Net effect on accumulated other comprehensive loss for the period 386 78 Net of tax Total reclassification for the period $ 420 $ 135

Derivatives and Hedging Activit

Derivatives and Hedging Activities (Tables)	6 Months Ended
	Mar. 31, 2019
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 March 31, 2019 and September 30, 2018 (in thousands). Fair Values of Derivative Instruments Fair Values of Derivative Instruments Asset Derivatives Liability Derivatives As of March 31, 2019 As of September 30, 2018 As of March 31, 2019 As of Septenber 30, 2018 Notional Amount Balance Sheet Location Fair Value Balance Sheet Location Fair Value Balance Sheet Location Fair Value Balance Sheet Location Fair Value Derivatives designated as hedging instruments Derivatives designated as hedging instruments Interest Rate Products $ 100,000 Other Assets $ 1,355 Other Assets $ 2,595 Interest Rate Products Other Liabilities $ 244 Other Liabilities $ — Total derivatives designated as hedging instruments $ 1,355 $ 2,595 Total derivatives designated as hedging instruments $ 244 $ —
Schedule of Effect of Fair Value and Cash Flow Hedge Accounting on Accumulated Other Comprehensive Income	The tables below presents the effect of the Company’s cash flow hedge accounting on Accumulated Other Comprehensive Income for the three and six month periods ended March 31, 2019 and 2018 (in thousands). The Effect of Fair Value and Cash Flow Hedge Accounting on Accumulated Other Comprehensive Income Derivatives in Hedging Relationships Gain (Loss) Recognized in OCI on Derivative (Effective Portion) Three Months Ended March 31, Gain (Loss)Reclassified from Accumulated OCI into Income (Effective Portion) Three Months Ended March 31, Derivatives in Cash Flow Hedging Relationships 2019 2018 Location of Gain Reclassified from Accumulated OCI into Income 2019 2018 Interest Rate Products $ (609 ) $ 738 Interest expense $ 271 $ 76 Total $ (609 ) $ 738 $ 271 $ 76 Derivatives in Cash Flow Hedging Relationships Gain (Loss) Recognized in OCI on Derivative (Effective Portion) Six Months Ended March 31, Location of Gain or (Loss) Reclassified from Accumulated OCI into Income (Effective Portion) Gain (Loss)Reclassified from Accumulated OCI into Income (Effective Portion) Six Months Ended March 31, 2019 2018 2019 2018 Interest Rate Products $ (1,550 ) $ 1,195 Interest expense $ 488 $ 99 Total $ (1,550 ) $ 1,195 $ 488 $ 99 The table below presents the effect of the Company’s derivative financial instruments on Consolidated Statement of Operations for the three and six months ended March 31, 2019 and 2018. Location and Amount of Gain Recognized in Income on Fair Value and Cash Flow Hedging Relationships Three months ended March 31, 2019 Three months ended March 31, 2018 Interest Income (Expense) Other Income (Expense) Interest Income (Expense) Other Income (Expense) Total amounts of income and expense line items presented in the consolidated statement of operations in which the effects of fair value or cash flow hedges are recorded $ 271 $ — $ 76 $ — 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 $ 271 $ — $ 76 $ — Location and Amount of Gain Recognized in Income on Fair Value and Cash Flow Hedging Relationships Six months ended March 31, 2019 Six months ended March 31, 2018 Interest Income (Expense) Other Income (Expense) Interest Income (Expense) Other Income (Expense) Total amounts of income and expense line items presented in the consolidated statement of operations in which the effects of fair value or cash flow hedges are recorded $ 488 $ — $ 99 $ — 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 $ 488 $ — $ 99 $ —
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 March 31, 2019 and 2018. 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 Consolidated Balance Sheet. There were no derivative liabilities for the periods ended March 31, 2019 and September 30, 2018. Offsetting of Derivative Assets as of March 31, 2019 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 $ 1,355 $ — $ 1,355 $ (244 ) $ 1,111 $ — Offsetting of Derivative Liabilities as of March 31, 2019 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 Liabilities presented in the Statement of Financial Position Financial Instruments Cash Collateral Received Net Amount Derivatives $ 244 $ — $ 244 $ (244 ) $ — $ — 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

Nature of Operations and Basi_2

Nature of Operations and Basis of Presentation - Additional Information (Detail)	Mar. 31, 2019
ESSA Advisory Services, LLC [Member]
Summary Of Significant Accounting Policies [Line Items]
Percentage ownership of wholly owned subsidiary	100.00%

Earnings Per Share - Compositio

Earnings Per Share - Composition of the Weighted-Average Common Shares (Denominator) Used in the Basic and Diluted Earnings per Share Computation (Detail) - shares	3 Months Ended		6 Months Ended
	Mar. 31, 2019	Mar. 31, 2018	Mar. 31, 2019	Mar. 31, 2018
Earnings Per Share [Abstract]
Weighted-average common shares outstanding	18,133,095	18,133,095	18,133,095	18,133,095
Average treasury stock shares	(6,458,020)	(6,459,392)	(6,386,412)	(6,490,961)
Average unearned ESOP shares	(797,738)	(843,010)	(803,457)	(848,729)
Average unearned non-vested shares	(51,711)	(34,340)	(52,039)	(44,318)
Weighted average common shares and common stock equivalents used to calculate basic earnings per share	10,825,626	10,796,353	10,891,187	10,749,087
Additional common stock equivalents (non-vested stock) used to calculate diluted earnings per share		347		143
Additional common stock equivalents (stock options) used to calculate diluted earnings per share		25,409		31,149
Weighted average common shares and common stock equivalents used to calculate diluted earnings per share	10,825,626	10,822,109	10,891,187	10,780,379

Earnings Per Share - Additional

Earnings Per Share - Additional Information (Detail) - Stock Option [Member] - $ / shares	6 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Anti-dilutive securities	45,214	53,313
Average weighted price per share of anti-dilutive shares	$ 16.01	$ 15.24

Accounting Pronouncements - Add

Accounting Pronouncements - Additional Information (Detail) - USD ($)	Oct. 01, 2018	Mar. 31, 2019
ASU 2016-01 [Member]
New Accounting Pronouncements Or Change In Accounting Principle [Line Items]
Reclassification from accumulated other comprehensive income to retained earnings	$ 4,000
ASU 2016-02, Leases [Member] | Maximum [Member]
New Accounting Pronouncements Or Change In Accounting Principle [Line Items]
Estimated percentage increase in assets from recognition of leases		1.00%
Estimated percentage increase in liabilities from recognition of leases		1.00%

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	Mar. 31, 2019	Sep. 30, 2018
Schedule of Available-for-sale Securities [Line Items]
Available for sale, Amortized Cost	$ 353,128
Available for sale, Fair Value	348,617	$ 371,438
Available for sale equity securities, Amortized Cost		25
Available for sale equity securities, Gross Unrealized Losses		(5)
Available for sale equity securities, Fair Value	21	20
Available for sale equity and debt securities, Amortized Cost		385,831
Available for sale equity and debt securities, Gross Unrealized Gains		388
Available for sale equity and debt securities, Gross Unrealized Losses		(14,781)
Available for sale equity and debt securities, Fair Value		371,438
Fannie Mae [Member]
Schedule of Available-for-sale Securities [Line Items]
Available for sale, Amortized Cost	145,081	147,433
Available for sale, Gross Unrealized Gains	396	17
Available for sale, Gross Unrealized Losses	(2,097)	(5,827)
Available for sale, Fair Value	143,380	141,623
Freddie Mac [Member]
Schedule of Available-for-sale Securities [Line Items]
Available for sale, Amortized Cost	88,859	99,587
Available for sale, Gross Unrealized Gains	65	2
Available for sale, Gross Unrealized Losses	(1,370)	(4,415)
Available for sale, Fair Value	87,554	95,174
Governmental National Mortgage Association Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Available for sale, Amortized Cost	20,142	22,164
Available for sale, Gross Unrealized Gains	18
Available for sale, Gross Unrealized Losses	(455)	(838)
Available for sale, Fair Value	19,705	21,326
Mortgage-Backed Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Available for sale, Amortized Cost	254,082	269,184
Available for sale, Gross Unrealized Gains	479	19
Available for sale, Gross Unrealized Losses	(3,922)	(11,080)
Available for sale, Fair Value	250,639	258,123
Obligations of States and Political Subdivisions [Member]
Schedule of Available-for-sale Securities [Line Items]
Available for sale, Amortized Cost	24,454	42,090
Available for sale, Gross Unrealized Gains	235	251
Available for sale, Gross Unrealized Losses	(321)	(1,392)
Available for sale, Fair Value	24,368	40,949
U.S. Government Agency Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Available for sale, Amortized Cost	8,064	5,678
Available for sale, Gross Unrealized Gains	158	2
Available for sale, Gross Unrealized Losses	(14)	(122)
Available for sale, Fair Value	8,208	5,558
Corporate Obligations [Member]
Schedule of Available-for-sale Securities [Line Items]
Available for sale, Amortized Cost	47,915	48,559
Available for sale, Gross Unrealized Gains	213	116
Available for sale, Gross Unrealized Losses	(766)	(1,260)
Available for sale, Fair Value	47,362	47,415
Other Debt Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Available for sale, Amortized Cost	18,613	20,295
Available for sale, Gross Unrealized Gains	4	0
Available for sale, Gross Unrealized Losses	(577)	(922)
Available for sale, Fair Value	18,040	19,373
Total Debt Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Available for sale, Amortized Cost	353,128	385,806
Available for sale, Gross Unrealized Gains	1,089	388
Available for sale, Gross Unrealized Losses	(5,600)	(14,776)
Available for sale, Fair Value	$ 348,617	$ 371,418

Investment Securities - Additio

Investment Securities - Additional Information (Detail) - USD ($)	3 Months Ended		6 Months Ended
	Mar. 31, 2019	Mar. 31, 2018	Mar. 31, 2019	Mar. 31, 2018	Sep. 30, 2018
Amortized Cost And Fair Value Debt Securities [Abstract]
Equity Securities Fv Ni	$ 21,000		$ 21,000		$ 20,000
Unrealized loss net of tax recognized inAOCI					$ 4,000
Realized gross gains	132,000	$ 300,000	175,000	$ 300,000
Realized gross losses	93,000	225,000	132,000	225,000
Proceeds from sale of investment securities	$ 20,500,000	$ 22,100,000	$ 30,455,000	$ 22,074,000

Investment Securities - Summa_2

Investment Securities - Summary of Unrealized and Realized Gains Losses Recognized in Net Income on Equity Securities (Detail) - USD ($) $ in Thousands	3 Months Ended	6 Months Ended
	Mar. 31, 2019	Mar. 31, 2019
Investments Debt And Equity Securities [Abstract]
Net gains and (losses) recognized during the period on equity securities	$ 3	$ 1
Unrealized gains and (losses) recognized during the reporting period on equity securities still held at the reporting date	$ 3	$ 1

Investment Securities - Schedul

Investment Securities - Schedule of Amortized Cost and Fair Value of Debt Securities by Contractual Maturity (Detail) - USD ($) $ in Thousands	Mar. 31, 2019	Sep. 30, 2018
Available-for-sale Securities, Debt Maturities, Amortized Cost Basis, Fiscal Year Maturity [Abstract]
Due after one year through five years, Amortized Cost	$ 28,061
Due after five years through ten years, Amortized Cost	95,084
Due after ten years, Amortized Cost	229,983
Available for sale, Amortized Cost	353,128
Due after one year through five years, Fair Value	28,124
Due after five years through ten years, Fair Value	94,171
Due after ten years, Fair Value	226,322
Total, Fair Value	$ 348,617	$ 371,438

Investment Securities - Sched_2

Investment Securities - Schedule of Gross Unrealized Losses and Fair Value (Detail) $ in Thousands	Mar. 31, 2019USD ($)Security	Sep. 30, 2018USD ($)Security
Schedule of Available-for-sale Securities [Line Items]
Number of Securities, Debt | Security	230
Fair Value, Less than Twelve Months, Debt	$ 15,607
Gross Unrealized Losses, Less than Twelve Months, Debt	(161)
Fair Value, Twelve Months or Greater, Debt	247,522
Gross Unrealized Losses, Twelve Months or Greater, Debt	(5,439)
Fair Value Total, Debt	263,129
Gross Unrealized Losses Total, Debt	$ (5,600)
Number of Securities, Equity securities | Security		1
Fair Value, Less than Twelve Months, Equity securities		$ 20
Gross Unrealized Losses, Less than Twelve Months, Equity securities		(5)
Gross Unrealized Losses, Twelve Months or Greater, Equity securities		0
Fair Value Total, Equity securities		20
Gross Unrealized Losses Total, Equity securities		$ (5)
Number of Securities, Equity securities and Debt securities | Security		276
Fair Value, Less than Twelve Months, Equity and Debt securities		$ 138,094
Gross Unrealized Losses, Less than Twelve Months, Equity and Debt securities		(3,047)
Fair Value, Twelve Months or Greater, Equity and Debt securities		203,329
Gross Unrealized Losses, Twelve Months or Greater, Equity and Debt securities		(11,734)
Fair Value Total, Equity and Debt securities		341,423
Gross Unrealized Losses Total, Equity and Debt securities		$ (14,781)
Fannie Mae [Member]
Schedule of Available-for-sale Securities [Line Items]
Number of Securities, Debt | Security	84	100
Fair Value, Less than Twelve Months, Debt	$ 2,718	$ 63,997
Gross Unrealized Losses, Less than Twelve Months, Debt	(22)	(1,442)
Fair Value, Twelve Months or Greater, Debt	102,134	74,783
Gross Unrealized Losses, Twelve Months or Greater, Debt	(2,075)	(4,385)
Fair Value Total, Debt	104,852	138,780
Gross Unrealized Losses Total, Debt	$ (2,097)	$ (5,827)
Freddie Mac [Member]
Schedule of Available-for-sale Securities [Line Items]
Number of Securities, Debt | Security	63	74
Fair Value, Less than Twelve Months, Debt		$ 28,902
Gross Unrealized Losses, Less than Twelve Months, Debt		(830)
Fair Value, Twelve Months or Greater, Debt	$ 75,176	65,812
Gross Unrealized Losses, Twelve Months or Greater, Debt	(1,370)	(3,585)
Fair Value Total, Debt	75,176	94,714
Gross Unrealized Losses Total, Debt	$ (1,370)	$ (4,415)
Governmental National Mortgage Association [Member]
Schedule of Available-for-sale Securities [Line Items]
Number of Securities, Debt | Security	16	19
Fair Value, Less than Twelve Months, Debt	$ 809	$ 9,776
Gross Unrealized Losses, Less than Twelve Months, Debt	(17)	(142)
Fair Value, Twelve Months or Greater, Debt	16,534	11,550
Gross Unrealized Losses, Twelve Months or Greater, Debt	(438)	(696)
Fair Value Total, Debt	17,343	21,326
Gross Unrealized Losses Total, Debt	$ (455)	$ (838)
Obligations of States and Political Subdivisions [Member]
Schedule of Available-for-sale Securities [Line Items]
Number of Securities, Debt | Security	15	25
Fair Value, Less than Twelve Months, Debt		$ 7,651
Gross Unrealized Losses, Less than Twelve Months, Debt	$ 0	(105)
Fair Value, Twelve Months or Greater, Debt	15,753	21,004
Gross Unrealized Losses, Twelve Months or Greater, Debt	(321)	(1,287)
Fair Value Total, Debt	15,753	28,655
Gross Unrealized Losses Total, Debt	$ (321)	$ (1,392)
U.S. Government Agency Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Number of Securities, Debt | Security	1	3
Fair Value, Less than Twelve Months, Debt		$ 5,177
Gross Unrealized Losses, Less than Twelve Months, Debt		(122)
Fair Value, Twelve Months or Greater, Debt	$ 1,949
Gross Unrealized Losses, Twelve Months or Greater, Debt	(14)
Fair Value Total, Debt	1,949	5,177
Gross Unrealized Losses Total, Debt	$ (14)	$ (122)
Corporate Obligations [Member]
Schedule of Available-for-sale Securities [Line Items]
Number of Securities, Debt | Security	32	34
Fair Value, Less than Twelve Months, Debt	$ 10,896	$ 20,172
Gross Unrealized Losses, Less than Twelve Months, Debt	(103)	(363)
Fair Value, Twelve Months or Greater, Debt	20,187	13,206
Gross Unrealized Losses, Twelve Months or Greater, Debt	(663)	(897)
Fair Value Total, Debt	31,083	33,378
Gross Unrealized Losses Total, Debt	$ (766)	$ (1,260)
Other Debt Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Number of Securities, Debt | Security	19	20
Fair Value, Less than Twelve Months, Debt	$ 1,184	$ 2,399
Gross Unrealized Losses, Less than Twelve Months, Debt	(19)	(38)
Fair Value, Twelve Months or Greater, Debt	15,789	16,974
Gross Unrealized Losses, Twelve Months or Greater, Debt	(558)	(884)
Fair Value Total, Debt	16,973	19,373
Gross Unrealized Losses Total, Debt	$ (577)	$ (922)

Loans Receivable, Net and All_3

Loans Receivable, Net and Allowance for Loan Losses - Summary of Loans Receivable (Detail) - USD ($) $ in Thousands	Mar. 31, 2019	Dec. 31, 2018	Sep. 30, 2018	Mar. 31, 2018	Dec. 31, 2017	Sep. 30, 2017
Real estate loans:
Total Loans	$ 1,347,586		$ 1,316,759
Less allowance for loan losses	12,389	$ 12,221	11,688	$ 10,510	$ 9,833	$ 9,365
Net loans	1,335,197		1,305,071
Obligations of States and Political Subdivisions [Member]
Real estate loans:
Total Loans	70,549		73,362
Less allowance for loan losses	294	295	323	269	213	248
Home Equity Loans and Lines of Credit [Member]
Real estate loans:
Total Loans	43,668		43,962
Less allowance for loan losses	295	298	296	401	449	470
Auto Loans [Member]
Real estate loans:
Total Loans	111,899		146,220
Less allowance for loan losses	1,608	1,694	1,859	1,904	1,962	1,836
Other [Member]
Real estate loans:
Total Loans	2,943		2,682
Less allowance for loan losses	27	26	23	21	21	21
Residential [Member] | Real Estate Loans [Member]
Real estate loans:
Total Loans	595,116		580,561
Less allowance for loan losses	3,742	3,745	3,605	3,755	3,769	3,878
Construction [Member] | Real Estate Loans [Member]
Real estate loans:
Total Loans	6,399		3,920
Less allowance for loan losses	59	43	35	33	33	23
Commercial [Member] | Real Estate Loans [Member]
Real estate loans:
Total Loans	458,292		416,573
Less allowance for loan losses	3,816	3,496	3,458	2,821	2,319	1,758
Commercial Loans [Member]
Real estate loans:
Total Loans	58,720		49,479
Less allowance for loan losses	$ 1,865	$ 1,704	$ 1,462	$ 1,219	$ 1,054	$ 987

Loans Receivable, Net and All_4

Loans Receivable, Net and Allowance for Loan Losses - Summary of Additional Information Regarding Loans Acquired and Accounted (Detail) - USD ($) $ in Thousands	Mar. 31, 2019	Sep. 30, 2018
Accounts, Notes, Loans and Financing Receivable [Line Items]
Carrying amount	$ 1,347,586	$ 1,316,759
Loans Acquired with Deteriorated Credit Quality [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Outstanding balance	1,593	2,497
Carrying amount	$ 1,486	$ 1,802

Loans Receivable, Net and All_5

Loans Receivable, Net and Allowance for Loan Losses - Schedule of Loans Evaluated for Impairment (Detail) - USD ($) $ in Thousands	Mar. 31, 2019	Sep. 30, 2018
Financing Receivable, Recorded Investment [Line Items]
Total Loans	$ 1,347,586	$ 1,316,759
Individually Evaluated for Impairment	7,709	11,870
Collectively Evaluated for Impairment	1,338,391	1,303,087
Loans Acquired with Deteriorated Credit Quality [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Loans	1,486	1,802
Obligations of States and Political Subdivisions [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Loans	70,549	73,362
Collectively Evaluated for Impairment	70,549	73,362
Home Equity Loans and Lines of Credit [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Loans	43,668	43,962
Individually Evaluated for Impairment	256	114
Collectively Evaluated for Impairment	43,412	43,848
Auto Loans [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Loans	111,899	146,220
Individually Evaluated for Impairment	500	445
Collectively Evaluated for Impairment	111,399	145,775
Other [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Loans	2,943	2,682
Individually Evaluated for Impairment	16	17
Collectively Evaluated for Impairment	2,927	2,665
Residential [Member] | Real Estate Loans [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Loans	595,116	580,561
Individually Evaluated for Impairment	4,311	5,317
Collectively Evaluated for Impairment	590,805	575,244
Construction [Member] | Real Estate Loans [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Loans	6,399	3,920
Collectively Evaluated for Impairment	6,399	3,920
Commercial [Member] | Real Estate Loans [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Loans	458,292	416,573
Individually Evaluated for Impairment	2,075	5,892
Collectively Evaluated for Impairment	454,731	408,880
Commercial [Member] | Real Estate Loans [Member] | Loans Acquired with Deteriorated Credit Quality [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Loans	1,486	1,801
Commercial Loans [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Loans	58,720	49,479
Individually Evaluated for Impairment	551	85
Collectively Evaluated for Impairment	$ 58,169	49,393
Commercial Loans [Member] | Loans Acquired with Deteriorated Credit Quality [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Loans		$ 1

Loans Receivable, Net and All_6

Loans Receivable, Net and Allowance for Loan Losses - Schedule of Investment and Unpaid Principal Balances for Impaired Loans (Detail) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Mar. 31, 2019	Mar. 31, 2018	Mar. 31, 2019	Mar. 31, 2018	Sep. 30, 2018
Financing Receivable, Impaired [Line Items]
Recorded Investment	$ 7,709		$ 7,709		$ 11,870
Unpaid Principal Balance	10,382		10,382		15,014
Associated Allowance	452		452		313
Average Recorded Investment	7,592	$ 14,104	8,807	$ 14,506
Interest Income Recognized	10	99	59	210
With no Specific Allowance Recorded [Member]
Financing Receivable, Impaired [Line Items]
Recorded Investment	5,970		5,970		10,644
Unpaid Principal Balance	8,271		8,271		13,701
Average Recorded Investment	6,038	12,586	7,514	12,841
Interest Income Recognized	10	99	59	210
With an Allowance Recorded [Member]
Financing Receivable, Impaired [Line Items]
Recorded Investment	1,739		1,739		1,226
Unpaid Principal Balance	2,111		2,111		1,313
Associated Allowance	452		452		313
Average Recorded Investment	1,554	1,518	1,293	1,665
Interest Income Recognized				0
Home Equity Loans and Lines of Credit [Member]
Financing Receivable, Impaired [Line Items]
Recorded Investment	256		256		114
Unpaid Principal Balance	293		293		138
Associated Allowance	6		6
Average Recorded Investment	262	215	213	212
Interest Income Recognized				1
Home Equity Loans and Lines of Credit [Member] | With no Specific Allowance Recorded [Member]
Financing Receivable, Impaired [Line Items]
Recorded Investment	238		238		114
Unpaid Principal Balance	275		275		138
Average Recorded Investment	229	203	190	205
Interest Income Recognized				1
Home Equity Loans and Lines of Credit [Member] | With an Allowance Recorded [Member]
Financing Receivable, Impaired [Line Items]
Recorded Investment	18		18
Unpaid Principal Balance	18		18
Associated Allowance	6		6
Average Recorded Investment	33	12	23	7
Auto Loans [Member]
Financing Receivable, Impaired [Line Items]
Recorded Investment	500		500		445
Unpaid Principal Balance	685		685		598
Associated Allowance	149		149		164
Average Recorded Investment	335	439	313	419
Interest Income Recognized	1		1	1
Auto Loans [Member] | With no Specific Allowance Recorded [Member]
Financing Receivable, Impaired [Line Items]
Recorded Investment	136		136		87
Unpaid Principal Balance	216		216		223
Average Recorded Investment	85	208	86	172
Interest Income Recognized	1		1	1
Auto Loans [Member] | With an Allowance Recorded [Member]
Financing Receivable, Impaired [Line Items]
Recorded Investment	364		364		358
Unpaid Principal Balance	469		469		375
Associated Allowance	149		149		164
Average Recorded Investment	250	231	227	247
Interest Income Recognized				0
Other [Member]
Financing Receivable, Impaired [Line Items]
Recorded Investment	16		16		17
Unpaid Principal Balance	23		23		25
Average Recorded Investment	16	28	17	29
Other [Member] | With no Specific Allowance Recorded [Member]
Financing Receivable, Impaired [Line Items]
Recorded Investment	16		16		17
Unpaid Principal Balance	23		23		25
Average Recorded Investment	16	28	17	29
Residential [Member] | Real Estate Loans [Member]
Financing Receivable, Impaired [Line Items]
Recorded Investment	4,311		4,311		5,317
Unpaid Principal Balance	5,842		5,842		7,114
Associated Allowance	144		144		149
Average Recorded Investment	4,718	5,436	4,850	5,697
Interest Income Recognized		6	3	16
Residential [Member] | Real Estate Loans [Member] | With no Specific Allowance Recorded [Member]
Financing Receivable, Impaired [Line Items]
Recorded Investment	3,315		3,315		4,449
Unpaid Principal Balance	4,615		4,615		6,176
Average Recorded Investment	3,567	4,180	3,867	4,305
Interest Income Recognized		6	3	16
Residential [Member] | Real Estate Loans [Member] | With an Allowance Recorded [Member]
Financing Receivable, Impaired [Line Items]
Recorded Investment	996		996		868
Unpaid Principal Balance	1,227		1,227		938
Associated Allowance	144		144		149
Average Recorded Investment	1,151	1,256	983	1,392
Commercial [Member] | Real Estate Loans [Member]
Financing Receivable, Impaired [Line Items]
Recorded Investment	2,075		2,075		5,892
Unpaid Principal Balance	2,831		2,831		6,790
Associated Allowance	65		65
Average Recorded Investment	2,022	6,808	3,253	6,916
Interest Income Recognized	8	69	54	141
Commercial [Member] | Real Estate Loans [Member] | With no Specific Allowance Recorded [Member]
Financing Receivable, Impaired [Line Items]
Recorded Investment	1,811		1,811		5,892
Unpaid Principal Balance	2,534		2,534		6,790
Average Recorded Investment	1,934	6,789	3,209	6,897
Interest Income Recognized	8	69	54	141
Commercial [Member] | Real Estate Loans [Member] | With an Allowance Recorded [Member]
Financing Receivable, Impaired [Line Items]
Recorded Investment	264		264
Unpaid Principal Balance	297		297
Associated Allowance	65		65
Average Recorded Investment	88	19	44	19
Commercial Loans [Member]
Financing Receivable, Impaired [Line Items]
Recorded Investment	551		551		85
Unpaid Principal Balance	708		708		349
Associated Allowance	88		88
Average Recorded Investment	239	1,178	161	1,233
Interest Income Recognized	1	24	1	51
Commercial Loans [Member] | With no Specific Allowance Recorded [Member]
Financing Receivable, Impaired [Line Items]
Recorded Investment	454		454		85
Unpaid Principal Balance	608		608		$ 349
Average Recorded Investment	207	1,178	145	1,233
Interest Income Recognized	1	$ 24	1	$ 51
Commercial Loans [Member] | With an Allowance Recorded [Member]
Financing Receivable, Impaired [Line Items]
Recorded Investment	97		97
Unpaid Principal Balance	100		100
Associated Allowance	88		88
Average Recorded Investment	$ 32		$ 16

Loans Receivable, Net and All_7

Loans Receivable, Net and Allowance for Loan Losses - Additional Information (Detail)	3 Months Ended		6 Months Ended
	Mar. 31, 2019USD ($)Contract	Mar. 31, 2018USD ($)Contract	Mar. 31, 2019USD ($)Contract	Mar. 31, 2018USD ($)Contract
Accounts, Notes, Loans and Financing Receivable [Line Items]
Criteria in internal rating system			Ten-point
Categories considered as not criticized			six
Days past due over which loans are considered as substandard			90 days
Minimum internal review amount	$ 750,000		$ 750,000
Minimum external review amount	$ 1,000,000		$ 1,000,000
Number of Contracts | Contract	0		5
Number of troubled debt restructuring loans granted terms concessions | Contract		1	1	1
Troubled debt restructurings granted terms concession		$ 107,000	$ 14,000	$ 107,000
Number of troubled debt restructuring loans granted terms and rate concessions | Contract		1	3	3
Troubled debt restructurings granted terms and rate concession		$ 15,000	$ 180,000	$ 250,000
Number of troubled debt restructuring loans granted interest rate concession | Contract			1
Troubled debt restructurings loans granted interest rate concession			$ 81,000
Number of troubled debt restructurings, loan modified, defaulted within one year of modification | Contract	0	1	0	2
Troubled debt restructurings, loan modified, defaulted within one year of modification		$ 72,000		$ 95,000
Consumer Residential Mortgages [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Foreclosed assets	$ 620,000,000		$ 620,000,000
Formal foreclosure proceeding assets	$ 2,200,000		$ 2,200,000

Loans Receivable, Net and All_8

Loans Receivable, Net and Allowance for Loan Losses - Classes of Loan Portfolio, Internal Risk Rating System (Detail) - USD ($) $ in Thousands	Mar. 31, 2019	Sep. 30, 2018
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loan, total	$ 1,335,197	$ 1,305,071
Commercial And Municipal Portfolio Segment
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loan, total	587,561	539,414
Commercial And Municipal Portfolio Segment | Commercial [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loan, total	458,292	416,573
Commercial And Municipal Portfolio Segment | Commercial Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loan, total	58,720	49,479
Commercial And Municipal Portfolio Segment | Obligations of States and Political Subdivisions [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loan, total	70,549	73,362
Commercial And Municipal Portfolio Segment | Pass [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loan, total	567,113	514,414
Commercial And Municipal Portfolio Segment | Pass [Member] | Commercial [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loan, total	438,820	392,915
Commercial And Municipal Portfolio Segment | Pass [Member] | Commercial Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loan, total	57,744	48,137
Commercial And Municipal Portfolio Segment | Pass [Member] | Obligations of States and Political Subdivisions [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loan, total	70,549	73,362
Commercial And Municipal Portfolio Segment | Special Mention [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loan, total	9,155	8,968
Commercial And Municipal Portfolio Segment | Special Mention [Member] | Commercial [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loan, total	9,149	8,960
Commercial And Municipal Portfolio Segment | Special Mention [Member] | Commercial Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loan, total	6	8
Commercial And Municipal Portfolio Segment | Substandard [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loan, total	11,293	16,032
Commercial And Municipal Portfolio Segment | Substandard [Member] | Commercial [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loan, total	10,323	14,698
Commercial And Municipal Portfolio Segment | Substandard [Member] | Commercial Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loan, total	$ 970	$ 1,334

Loans Receivable, Net and All_9

Loans Receivable, Net and Allowance for Loan Losses - Schedule of Performing or Non-Performing Loans (Detail) - USD ($) $ in Thousands	Mar. 31, 2019	Sep. 30, 2018
Financing Receivable, Recorded Investment [Line Items]
Total	$ 1,335,197	$ 1,305,071
Consumer Portfolio Segment [Member]
Financing Receivable, Recorded Investment [Line Items]
Total	760,025	777,345
Home Equity Loans and Lines of Credit [Member] | Consumer Portfolio Segment [Member]
Financing Receivable, Recorded Investment [Line Items]
Total	43,668	43,962
Auto Loans [Member] | Consumer Portfolio Segment [Member]
Financing Receivable, Recorded Investment [Line Items]
Total	111,899	146,220
Other [Member] | Consumer Portfolio Segment [Member]
Financing Receivable, Recorded Investment [Line Items]
Total	2,943	2,682
Performing [Member] | Consumer Portfolio Segment [Member]
Financing Receivable, Recorded Investment [Line Items]
Total	754,455	771,207
Performing [Member] | Home Equity Loans and Lines of Credit [Member] | Consumer Portfolio Segment [Member]
Financing Receivable, Recorded Investment [Line Items]
Total	43,280	43,746
Performing [Member] | Auto Loans [Member] | Consumer Portfolio Segment [Member]
Financing Receivable, Recorded Investment [Line Items]
Total	111,220	145,633
Performing [Member] | Other [Member] | Consumer Portfolio Segment [Member]
Financing Receivable, Recorded Investment [Line Items]
Total	2,909	2,664
Non-performing [Member] | Consumer Portfolio Segment [Member]
Financing Receivable, Recorded Investment [Line Items]
Total	5,570	6,138
Non-performing [Member] | Home Equity Loans and Lines of Credit [Member] | Consumer Portfolio Segment [Member]
Financing Receivable, Recorded Investment [Line Items]
Total	388	216
Non-performing [Member] | Auto Loans [Member] | Consumer Portfolio Segment [Member]
Financing Receivable, Recorded Investment [Line Items]
Total	679	587
Non-performing [Member] | Other [Member] | Consumer Portfolio Segment [Member]
Financing Receivable, Recorded Investment [Line Items]
Total	34	18
Residential [Member] | Real Estate Loans [Member] | Consumer Portfolio Segment [Member]
Financing Receivable, Recorded Investment [Line Items]
Total	595,116	580,561
Residential [Member] | Performing [Member] | Real Estate Loans [Member] | Consumer Portfolio Segment [Member]
Financing Receivable, Recorded Investment [Line Items]
Total	590,647	575,244
Residential [Member] | Non-performing [Member] | Real Estate Loans [Member] | Consumer Portfolio Segment [Member]
Financing Receivable, Recorded Investment [Line Items]
Total	4,469	5,317
Construction [Member] | Real Estate Loans [Member] | Consumer Portfolio Segment [Member]
Financing Receivable, Recorded Investment [Line Items]
Total	6,399	3,920
Construction [Member] | Performing [Member] | Real Estate Loans [Member] | Consumer Portfolio Segment [Member]
Financing Receivable, Recorded Investment [Line Items]
Total	$ 6,399	$ 3,920

Loans Receivable, Net and Al_10

Loans Receivable, Net and Allowance for Loan Losses - Classes of Loan Portfolio Summarized by Aging Categories (Detail) - USD ($) $ in Thousands	Mar. 31, 2019	Sep. 30, 2018
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current	$ 1,334,375	$ 1,301,224
31-60 Days Past Due	2,815	3,818
61-89 Days Past Due	791	951
Non-accrual	8,119	8,964
Total Past Due	11,725	13,733
Purchased Credit Impaired, Accruing	249	255
Purchased Credit Impaired, Nonaccrual	1,237	1,547
Total Loans	1,347,586	1,316,759
Obligations of States and Political Subdivisions [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current	70,549	73,362
Total Loans	70,549	73,362
Home Equity Loans and Lines of Credit [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current	43,145	43,716
31-60 Days Past Due	129	30
61-89 Days Past Due	6
Non-accrual	388	216
Total Past Due	523	246
Total Loans	43,668	43,962
Auto Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current	109,914	144,140
31-60 Days Past Due	1,280	1,473
61-89 Days Past Due	26	20
Non-accrual	679	587
Total Past Due	1,985	2,080
Total Loans	111,899	146,220
Other [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current	2,881	2,647
31-60 Days Past Due	16	17
61-89 Days Past Due	12
Non-accrual	34	18
Total Past Due	62	35
Total Loans	2,943	2,682
Residential [Member] | Real Estate Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current	588,638	572,236
31-60 Days Past Due	1,283	2,088
61-89 Days Past Due	726	920
Non-accrual	4,469	5,317
Total Past Due	6,478	8,325
Total Loans	595,116	580,561
Construction [Member] | Real Estate Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current	6,399	3,920
Total Loans	6,399	3,920
Commercial [Member] | Real Estate Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current	455,031	412,636
31-60 Days Past Due	70	185
Non-accrual	1,921	1,951
Total Past Due	1,991	2,136
Purchased Credit Impaired, Accruing	249	255
Purchased Credit Impaired, Nonaccrual	1,021	1,546
Total Loans	458,292	416,573
Commercial Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current	57,818	48,567
31-60 Days Past Due	37	25
61-89 Days Past Due	21	11
Non-accrual	628	875
Total Past Due	686	911
Purchased Credit Impaired, Nonaccrual	216	1
Total Loans	$ 58,720	$ 49,479

Loans Receivable, Net and Al_11

Loans Receivable, Net and Allowance for Loan Losses - Summary of Primary Segments of ALL (Detail) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Mar. 31, 2019	Mar. 31, 2018	Mar. 31, 2019	Mar. 31, 2018	Sep. 30, 2018
Financing Receivable, Allowance for Credit Losses [Line Items]
Balance, Beginning of period	$ 12,221	$ 9,833	$ 11,688	$ 9,365
Charge-offs	(538)	(642)	(1,070)	(1,361)
Recoveries	106	219	295	406
Provision	600	1,100	1,476	2,100
Balance, End of period	12,389	10,510	12,389	10,510
Individually evaluated for impairment	452		452		$ 313
Collectively evaluated for impairment	11,937		11,937		11,375
Commercial Loans [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Balance, Beginning of period	1,704	1,054	1,462	987
Charge-offs		(5)	(22)	(137)
Recoveries				10
Provision	161	170	425	359
Balance, End of period	1,865	1,219	1,865	1,219
Individually evaluated for impairment	88		88
Collectively evaluated for impairment	1,777		1,777		1,462
Unallocated [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Balance, Beginning of period	920	13	627	144
Provision	(237)	74	56	(57)
Balance, End of period	683	87	683	87
Collectively evaluated for impairment	683		683		627
Real Estate Loans [Member] | Residential [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Balance, Beginning of period	3,745	3,769	3,605	3,878
Charge-offs	(131)	(52)	(273)	(95)
Recoveries	3	3	9	6
Provision	125	35	401	(34)
Balance, End of period	3,742	3,755	3,742	3,755
Individually evaluated for impairment	144		144		149
Collectively evaluated for impairment	3,598		3,598		3,456
Real Estate Loans [Member] | Construction [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Balance, Beginning of period	43	33	35	23
Provision	16	0	24	10
Balance, End of period	59	33	59	33
Collectively evaluated for impairment	59		59		35
Real Estate Loans [Member] | Commercial [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Balance, Beginning of period	3,496	2,319	3,458	1,758
Charge-offs	(7)	(14)	(7)	(15)
Recoveries	12		12	2
Provision	315	516	353	1,076
Balance, End of period	3,816	2,821	3,816	2,821
Individually evaluated for impairment	65		65
Collectively evaluated for impairment	3,751		3,751		3,458
Obligations of States and Political Subdivisions [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Balance, Beginning of period	295	213	323	248
Provision	(1)	56	(29)	21
Balance, End of period	294	269	294	269
Collectively evaluated for impairment	294		294		323
Home Equity Loans and Lines of Credit [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Balance, Beginning of period	298	449	296	470
Charge-offs	(19)	(6)	(19)	(6)
Recoveries	2	3	3	5
Provision	14	(45)	15	(68)
Balance, End of period	295	401	295	401
Individually evaluated for impairment	6		6
Collectively evaluated for impairment	289		289		296
Auto Loans [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Balance, Beginning of period	1,694	1,962	1,859	1,836
Charge-offs	(370)	(550)	(738)	(1,087)
Recoveries	88	211	269	381
Provision	196	281	218	774
Balance, End of period	1,608	1,904	1,608	1,904
Individually evaluated for impairment	149		149		164
Collectively evaluated for impairment	1,459		1,459		1,695
Other [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Balance, Beginning of period	26	21	23	21
Charge-offs	(11)	(15)	(11)	(21)
Recoveries	1	2	2	2
Provision	11	13	13	19
Balance, End of period	27	$ 21	27	$ 21
Collectively evaluated for impairment	$ 27		$ 27		$ 23

Loans Receivable, Net and Al_12

Loans Receivable, Net and Allowance for Loan Losses - Summary of Troubled Debt Restructuring Granted (Detail) $ in Thousands	3 Months Ended		6 Months Ended
	Mar. 31, 2019Contract	Mar. 31, 2018USD ($)Contract	Mar. 31, 2019USD ($)Contract	Mar. 31, 2018USD ($)Contract
Financing Receivable, Modifications [Line Items]
Number of Contracts | Contract	0		5
Real Estate Loans [Member] | Residential [Member]
Financing Receivable, Modifications [Line Items]
Number of Contracts | Contract			2	2
Pre-Modification Outstanding Recorded Investment			$ 95	$ 243
Post-Modification Outstanding Recorded Investment			$ 95	$ 235
Real Estate Loans [Member] | Commercial [Member]
Financing Receivable, Modifications [Line Items]
Number of Contracts | Contract		1		1
Pre-Modification Outstanding Recorded Investment		$ 107		$ 107
Post-Modification Outstanding Recorded Investment		$ 107		$ 107
Home Equity Loans and Lines of Credit [Member]
Financing Receivable, Modifications [Line Items]
Number of Contracts | Contract			2
Pre-Modification Outstanding Recorded Investment			$ 159
Post-Modification Outstanding Recorded Investment			$ 159
Auto Loans [Member]
Financing Receivable, Modifications [Line Items]
Number of Contracts | Contract		1	1	1
Pre-Modification Outstanding Recorded Investment		$ 15	$ 21	$ 15
Post-Modification Outstanding Recorded Investment		$ 15	$ 21	$ 15
Troubled Debt Restructurings [Member]
Financing Receivable, Modifications [Line Items]
Number of Contracts | Contract		2	5	4
Pre-Modification Outstanding Recorded Investment		$ 122	$ 275	$ 365
Post-Modification Outstanding Recorded Investment		$ 122	$ 275	$ 357

Deposits - Schedule of Deposits

Deposits - Schedule of Deposits by Major Classifications (Detail) - USD ($) $ in Thousands	Mar. 31, 2019	Sep. 30, 2018
Banking And Thrift [Abstract]
Non-interest bearing demand accounts	$ 167,948	$ 158,340
Interest bearing demand accounts	178,593	221,327
Money market accounts	327,906	296,078
Savings and club accounts	136,875	135,862
Certificates of deposit	482,561	525,248
Total	$ 1,293,883	$ 1,336,855

Net Periodic Benefit Cost-Def_3

Net Periodic Benefit Cost-Defined Benefit Plan - Summary of the Components of Net Periodic Benefit Cost (Detail) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Mar. 31, 2019	Mar. 31, 2018	Mar. 31, 2019	Mar. 31, 2018
Compensation Related Costs [Abstract]
Interest Cost	$ 173	$ 175	$ 347	$ 349
Expected return on plan assets	(293)	(299)	(586)	(597)
Net periodic benefit cost	$ (120)	$ (124)	$ (239)	$ (248)

Equity Incentive Plan - Additio

Equity Incentive Plan - Additional Information (Detail) - USD ($)	3 Months Ended		6 Months Ended
	Mar. 31, 2019	Mar. 31, 2018	Mar. 31, 2019	Mar. 31, 2018	Mar. 02, 2016
Compensation Related Costs Disclosure [Line Items]
Share-based compensation expense			$ 350,000	$ 184,000
2007 Equity Incentive Plan [Member]
Compensation Related Costs Disclosure [Line Items]
Common stock issuance, Grant					2,377,326
Further number of shares, grants					0
2016 Plan [Member]
Compensation Related Costs Disclosure [Line Items]
Common stock issuance, Grant	250,000		250,000
Stock Option [Member]
Compensation Related Costs Disclosure [Line Items]
Common stock issuance, Grant					1,698,090
Restricted Stock [Member]
Compensation Related Costs Disclosure [Line Items]
Share-based compensation expense	$ 98,000	$ 104,000	$ 350,000	$ 184,000
Expected future expense			$ 736,000
Remaining vesting periods			3 years 6 months
Restricted Stock [Member] | Minimum [Member]
Compensation Related Costs Disclosure [Line Items]
Restricted shares vesting period			6 months
Restricted Stock [Member] | Maximum [Member]
Compensation Related Costs Disclosure [Line Items]
Restricted shares vesting period			43 months
Restricted Stock [Member] | 2007 Equity Incentive Plan [Member]
Compensation Related Costs Disclosure [Line Items]
Common stock issuance, Grant					679,236

Equity Incentive Plan - Schedul

Equity Incentive Plan - Schedule of Restricted Stock Option Activity (Detail) - Restricted Stock [Member]	6 Months Ended
	Mar. 31, 2019$ / sharesshares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of Restricted Stock, Nonvested at September 30, 2018 | shares	35,072
Number of Restricted Stock, Granted | shares	37,236
Number of Restricted Stock, Vested | shares	(11,625)
Number of Restricted Stock, Forfeited | shares	(5,120)
Number of Restricted Stock, Nonvested at March 31, 2019 | shares	55,563
Weighted-average Grant Date Fair Value, Nonvested at September 30, 2018 | $ / shares	$ 15.37
Weighted-average Grant Date Fair Value, Granted | $ / shares	16.23
Weighted-average Grant Date Fair Value, Vested | $ / shares	15.95
Weighted-average Grant Date Fair Value, Forfeited | $ / shares	15.87
Weighted-average Grant Date Fair Value, Nonvested at March 31, 2019 | $ / shares	$ 15.93

Fair Value - Schedule of Fair V

Fair Value - Schedule of Fair Value For Assets Required to be Measured and Reported at Fair Value on a Recurring Basis (Detail) - USD ($) $ in Thousands	Mar. 31, 2019	Sep. 30, 2018
Investment securities available for sale:
Total Debt Securities	$ 348,617	$ 371,438
Equity securities- financial services	21	20
Derivatives and hedging activities:	1,355	2,595
Fair Value, Measurements, Recurring [Member]
Investment securities available for sale:
Total Debt Securities	348,617	371,438
Equity securities- financial services	21	20
Derivatives and hedging activities:	1,143	2,452
Fair Value, Measurements, Recurring [Member] | Mortgage-Backed Securities [Member]
Investment securities available for sale:
Total Debt Securities	250,639	258,123
Fair Value, Measurements, Recurring [Member] | Obligations of States and Political Subdivisions [Member]
Investment securities available for sale:
Total Debt Securities	24,368	40,949
Fair Value, Measurements, Recurring [Member] | U.S. Government Agency Securities [Member]
Investment securities available for sale:
Total Debt Securities	8,208	5,558
Fair Value, Measurements, Recurring [Member] | Corporate Obligations [Member]
Investment securities available for sale:
Total Debt Securities	47,362	47,415
Fair Value, Measurements, Recurring [Member] | Other Debt Securities [Member]
Investment securities available for sale:
Total Debt Securities	18,040	19,373
Fair Value, Measurements, Recurring [Member] | Level I [Member]
Investment securities available for sale:
Total Debt Securities		20
Equity securities- financial services	21	20
Fair Value, Measurements, Recurring [Member] | Level II [Member]
Investment securities available for sale:
Total Debt Securities	340,884	363,680
Derivatives and hedging activities:	1,143	2,452
Fair Value, Measurements, Recurring [Member] | Level II [Member] | Mortgage-Backed Securities [Member]
Investment securities available for sale:
Total Debt Securities	250,639	258,123
Fair Value, Measurements, Recurring [Member] | Level II [Member] | Obligations of States and Political Subdivisions [Member]
Investment securities available for sale:
Total Debt Securities	24,368	40,949
Fair Value, Measurements, Recurring [Member] | Level II [Member] | U.S. Government Agency Securities [Member]
Investment securities available for sale:
Total Debt Securities	8,208	5,558
Fair Value, Measurements, Recurring [Member] | Level II [Member] | Corporate Obligations [Member]
Investment securities available for sale:
Total Debt Securities	39,629	39,677
Fair Value, Measurements, Recurring [Member] | Level II [Member] | Other Debt Securities [Member]
Investment securities available for sale:
Total Debt Securities	18,040	19,373
Fair Value, Measurements, Recurring [Member] | Level III [Member]
Investment securities available for sale:
Total Debt Securities	7,733	7,738
Fair Value, Measurements, Recurring [Member] | Level III [Member] | Corporate Obligations [Member]
Investment securities available for sale:
Total Debt Securities	$ 7,733	$ 7,738

Fair Value - Schedule of Change

Fair Value - Schedule of Changes in Fair Value of Level III Investments (Detail) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Mar. 31, 2019	Mar. 31, 2018	Mar. 31, 2019	Mar. 31, 2018
Fair Value Disclosures [Abstract]
Beginning balance	$ 7,642	$ 7,826	$ 7,738	$ 7,224
Purchases, sales, issuances, settlements, net				500
Total unrealized gain (loss):
Included in other comprehensive income (loss)	91	(59)	(5)	43
Ending balance	$ 7,733	$ 7,767	$ 7,733	$ 7,767

Fair Value - Schedule of Fair_2

Fair Value - Schedule of Fair Value For Assets Required to be Measured and Reported at Fair Value on a Nonrecurring Basis (Detail) - USD ($) $ in Thousands	Mar. 31, 2019	Sep. 30, 2018
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Foreclosed real estate	$ 665	$ 1,141
Fair Value, Measurements, Nonrecurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Foreclosed real estate	665	1,141
Impaired loans	7,257	11,557
Level III [Member] | Fair Value, Measurements, Nonrecurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Foreclosed real estate	665	1,141
Impaired loans	$ 7,257	$ 11,557

Fair Value - Summary of Additio

Fair Value - Summary of Additional Quantitative Information about Assets Measured at Fair Value on Nonrecurring Basis (Detail) - Fair Value, Measurements, Nonrecurring [Member] - Level III [Member] $ in Thousands	Mar. 31, 2019USD ($)	Sep. 30, 2018USD ($)
Impaired Loans [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair Value Estimate	$ 7,257	$ 11,557
Servicing Asset Valuation Technique Extensible List	essa:AppraisalOfCollateralMember	essa:AppraisalOfCollateralMember
Servicing Asset, Measurement Input [Extensible List]	essa:AppraisalAdjustmentsMember	essa:AppraisalAdjustmentsMember
Fair value input appraisal adjustments	0.208	0.240
Impaired Loans [Member] | Minimum [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair value input appraisal adjustments	0	0
Impaired Loans [Member] | Maximum [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair value input appraisal adjustments	0.35	0.57
Foreclosed Real Estate Owned [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair Value Estimate	$ 665	$ 1,141
Servicing Asset Valuation Technique Extensible List	essa:AppraisalOfCollateralMember	essa:AppraisalOfCollateralMember
Servicing Asset, Measurement Input [Extensible List]	essa:AppraisalAdjustmentsMember	essa:AppraisalAdjustmentsMember
Fair value input appraisal adjustments	0.268	0.221
Foreclosed Real Estate Owned [Member] | Minimum [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair value input appraisal adjustments	0.20	0.20
Foreclosed Real Estate Owned [Member] | Maximum [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair value input appraisal adjustments	0.46	0.46

Fair Value - Additional Informa

Fair Value - Additional Information (Detail) $ in Thousands	6 Months Ended	12 Months Ended
	Mar. 31, 2019USD ($)Loan	Sep. 30, 2018USD ($)Loan
Fair Value Disclosures [Abstract]
Number of impaired loans | Loan	146	133
Impaired loans, carrying value	$ 7,700	$ 11,900
Impaired loans, valuation allowance	452	313
Impaired loans, net fair value	$ 7,300	$ 11,600

Fair Value - Schedule of Assets

Fair Value - Schedule of Assets and Liabilities not Required to be Measured and Reported at Fair Value (Detail) - USD ($) $ in Thousands	Mar. 31, 2019	Sep. 30, 2018
Financial assets:
Loans receivable, net	$ 7,300	$ 11,600
Bank-owned life insurance	39,114	38,630
Financial liabilities:
Other borrowings	139,673	118,723
Advances by borrowers for taxes and insurance	10,353	6,826
Carrying Value [Member]
Financial assets:
Cash and cash equivalents	41,159	43,539
Certificates of deposit	250	500
Loans receivable, net	1,335,197	1,305,071
Accrued interest receivable	7,038	6,640
Regulatory stock	14,633	12,973
Mortgage servicing rights	210	206
Bank-owned life insurance	39,114	38,630
Financial liabilities:
Deposits	1,293,883	1,336,855
Short-term borrowings	198,293	179,773
Other borrowings	139,673	118,723
Advances by borrowers for taxes and insurance	10,353	6,826
Accrued interest payable	1,873	1,369
Estimated Fair Value [Member]
Financial assets:
Cash and cash equivalents	41,159	43,539
Certificates of deposit	250	505
Loans receivable, net	1,307,305	1,269,127
Accrued interest receivable	7,038	6,640
Regulatory stock	14,633	12,973
Mortgage servicing rights	323	340
Bank-owned life insurance	39,114	38,630
Financial liabilities:
Deposits	1,291,723	1,332,468
Short-term borrowings	198,293	179,773
Other borrowings	139,594	117,920
Advances by borrowers for taxes and insurance	10,353	6,826
Accrued interest payable	1,873	1,369
Estimated Fair Value [Member] | Level 1 [Member]
Financial assets:
Cash and cash equivalents	41,159	43,539
Accrued interest receivable	7,038	6,640
Regulatory stock	14,633	12,973
Bank-owned life insurance	39,114	38,630
Financial liabilities:
Deposits	811,322	811,607
Short-term borrowings	198,293	179,773
Advances by borrowers for taxes and insurance	10,353	6,826
Accrued interest payable	1,873	1,369
Estimated Fair Value [Member] | Level 3 [Member]
Financial assets:
Certificates of deposit	250	505
Loans receivable, net	1,307,305	1,269,127
Mortgage servicing rights	323	340
Financial liabilities:
Deposits	480,401	520,861
Other borrowings	$ 139,594	$ 117,920

Accumulated Other Comprehensi_3

Accumulated Other Comprehensive Loss - Summary of Activity in Accumulated Other Comprehensive Loss (Detail) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Mar. 31, 2019	Mar. 31, 2018	Mar. 31, 2019	Mar. 31, 2018
Accumulated Other Comprehensive Income Loss [Line Items]
Beginning Balance	$ 184,775	$ 179,479	$ 179,186	$ 182,727
Other comprehensive income (loss) before reclassifications	3,579	(4,513)	6,997	(5,500)
Amounts reclassified from accumulated other comprehensive loss, net of tax	(246)	(120)	(420)	(135)
Total other comprehensive income (loss)	3,333	(4,633)	6,581	(5,635)
Reclassification of certain income tax effects from accumulated other comprehensive income		(346)	4	(346)
Ending Balance	183,637	177,378	183,637	177,378
Defined Benefit Pension Plan [Member]
Accumulated Other Comprehensive Income Loss [Line Items]
Beginning Balance	(477)	(628)	(477)	(628)
Reclassification of certain income tax effects from accumulated other comprehensive income		(124)		(124)
Ending Balance	(477)	(752)	(477)	(752)
Unrealized Gains (Losses) on Securities Available for Sale [Member]
Accumulated Other Comprehensive Income Loss [Line Items]
Beginning Balance	(7,377)	(2,215)	(11,369)	(927)
Other comprehensive income (loss) before reclassifications	3,846	(5,100)	7,837	(6,388)
Amounts reclassified from accumulated other comprehensive loss, net of tax	(31)	(57)	(34)	(57)
Total other comprehensive income (loss)	3,815	(5,157)	7,807	(6,445)
Reclassification of certain income tax effects from accumulated other comprehensive income		(436)	4	(436)
Ending Balance	(3,562)	(7,808)	(3,562)	(7,808)
Derivatives [Member]
Accumulated Other Comprehensive Income Loss [Line Items]
Beginning Balance	1,192	1,087	1,936	801
Other comprehensive income (loss) before reclassifications	(267)	587	(840)	888
Amounts reclassified from accumulated other comprehensive loss, net of tax	(215)	(63)	(386)	(78)
Total other comprehensive income (loss)	(482)	524	(1,226)	810
Reclassification of certain income tax effects from accumulated other comprehensive income		214		214
Ending Balance	710	1,825	710	1,825
Accumulated Other Comprehensive Income/(Loss) [Member]
Accumulated Other Comprehensive Income Loss [Line Items]
Beginning Balance	(6,662)	(1,756)	(9,910)	(754)
Reclassification of certain income tax effects from accumulated other comprehensive income		(346)		(346)
Ending Balance	$ (3,329)	$ (6,735)	$ (3,329)	$ (6,735)

Accumulated Other Comprehensi_4

Accumulated Other Comprehensive Loss - Summary of Reclassification Out of Accumulated Other Comprehensive Income (Loss) (Detail) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Mar. 31, 2019	Mar. 31, 2018	Mar. 31, 2019	Mar. 31, 2018
Schedule of Available-for-sale Securities [Line Items]
Gain on sale of investments, net			$ 43	$ 75
Interest expense	$ (5,396)	$ (3,912)	(10,380)	(7,520)
Income taxes	(630)	(529)	(1,104)	(4,622)
Reclassification Out of Accumulated Other Comprehensive Income (Loss) [Member]
Schedule of Available-for-sale Securities [Line Items]
Net of tax	246	120	420	135
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	39	75	43	75
Income taxes	(8)	(18)	(9)	(18)
Net of tax	31	57	34	57
Reclassification Out of Accumulated Other Comprehensive Income (Loss) [Member] | Derivatives [Member]
Schedule of Available-for-sale Securities [Line Items]
Interest expense	271	76	488	99
Income taxes	(56)	(13)	(102)	(21)
Net of tax	$ 215	$ 63	$ 386	$ 78

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) - USD ($)	Mar. 31, 2019	Sep. 30, 2018
Derivatives Fair Value [Line Items]
Fair Values of Derivative Instruments, Asset	$ 1,355,000	$ 2,595,000
Fair Values of Derivative Instruments, Liability	244,000
Designated as Hedging Instrument [Member] | Interest Rate Products [Member]
Derivatives Fair Value [Line Items]
Derivatives, Notional Amount	100,000,000
Designated as Hedging Instrument [Member] | Interest Rate Products [Member] | Other Assets [Member]
Derivatives Fair Value [Line Items]
Fair Values of Derivative Instruments, Asset	1,355,000	$ 2,595,000
Designated as Hedging Instrument [Member] | Interest Rate Products [Member] | Other Liabilities [Member]
Derivatives Fair Value [Line Items]
Fair Values of Derivative Instruments, Liability	$ 244,000

Derivatives and Hedging Activ_3

Derivatives and Hedging Activities - Additional Information (Detail)	3 Months Ended		6 Months Ended		12 Months Ended
	Mar. 31, 2019USD ($)ContractDerivative	Mar. 31, 2018USD ($)	Mar. 31, 2019USD ($)ContractDerivative	Mar. 31, 2018USD ($)	Mar. 31, 2020USD ($)	Sep. 30, 2018USD ($)Derivative
Derivative Instruments And Hedging Activities Disclosures [Line Items]
Interest income	$ 17,128,000	$ 15,847,000	$ 33,997,000	$ 31,223,000
Increase (decrease) in accrued interest payable			504,000	34,000
Derivative liabilities	$ 0		$ 0			$ 0
Number of derivatives in a net liability position | Derivative	0		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	$ 271,000	$ 76,000	$ 488,000	$ 99,000
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					$ 739,000
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	4		4
Derivative, notional principal amount	$ 100,000,000		$ 100,000,000

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	3 Months Ended		6 Months Ended
	Mar. 31, 2019	Mar. 31, 2018	Mar. 31, 2019	Mar. 31, 2018
Derivative Instruments Gain Loss [Line Items]
Gain (Loss) Recognized in OCI on Derivative	$ (336)	$ 738	$ (1,061)	$ 1,195
Designated as Hedging Instrument [Member] | Cash Flow Hedges of Interest Rate Risk [Member]
Derivative Instruments Gain Loss [Line Items]
Gain (Loss) Recognized in OCI on Derivative	(609)	738	(1,550)	1,195
Gain (Loss) Reclassified from Accumulated OCI into Income	271	76	488	99
Designated as Hedging Instrument [Member] | Interest Rate Products [Member] | Cash Flow Hedges of Interest Rate Risk [Member]
Derivative Instruments Gain Loss [Line Items]
Gain (Loss) Recognized in OCI on Derivative	(609)	738	(1,550)	1,195
Designated as Hedging Instrument [Member] | Interest Rate Products [Member] | Cash Flow Hedges of Interest Rate Risk [Member] | Interest Expense [Member]
Derivative Instruments Gain Loss [Line Items]
Gain (Loss) Reclassified from Accumulated OCI into Income	$ 271	$ 76	$ 488	$ 99

Derivatives and Hedging Activ_5

Derivatives and Hedging Activities - Schedule of Effect of Derivative Financial Instruments on Income Statement (Detail) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Mar. 31, 2019	Mar. 31, 2018	Mar. 31, 2019	Mar. 31, 2018
Derivative Instruments Gain Loss [Line Items]
Total amounts of income and expense line items presented in the consolidated statement of operations in which the effects of fair value or cash flow hedges are recorded	$ (336)	$ 738	$ (1,061)	$ 1,195
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 consolidated statement of operations in which the effects of fair value or cash flow hedges are recorded	(609)	738	(1,550)	1,195
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 consolidated statement of operations in which the effects of fair value or cash flow hedges are recorded	(609)	738	(1,550)	1,195
Designated as Hedging Instrument [Member] | Interest Income (Expense) [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 consolidated statement of operations in which the effects of fair value or cash flow hedges are recorded	271	76	488	99
Amount of gain reclassified from accumulated other comprehensive income into income	271	76	488	99
Designated as Hedging Instrument [Member] | Other Income (Expense) [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 consolidated statement of operations in which the effects of fair value or cash flow hedges are recorded	0	0	0	0
Amount of gain reclassified from accumulated other comprehensive income into income	$ 0	$ 0	$ 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	Mar. 31, 2019	Sep. 30, 2018
Derivative Instruments And Hedging Activities Disclosure [Abstract]
Derivative Assets, Gross Amounts of Recognized Assets	$ 1,355	$ 2,595
Derivative Assets, Net Amounts of Assets presented in the Statement of Financial Position	1,355	2,595
Derivative Assets, Financial Instruments	(244)
Derivative Assets, Cash Collateral Received	1,111	2,540
Derivative Assets, Net Amount		55
Derivative Liabilities, Gross Amounts of Recognized Assets	244
Derivative Liabilities, Net Amounts of Liabilities presented in the Statement of Financial Position	244
Derivative Liabilities, Financial Instruments	(244)
Derivative Liabilities, Net Amount	$ 0	$ 0

Contingent Liabilities - Additi

Contingent Liabilities - Additional Information (Detail)	Dec. 08, 2016Plaintiff
Commitments And Contingencies Disclosure [Abstract]
Number of plaintiffs	1

Revenue Recognition - Additiona

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