ESSA Bancorp (ESSA) 10-Q9 May 162016 Q2 Quarterly reportFinancial data

Company Profile

Document and Entity Information

Document and Entity Information - shares	6 Months Ended
Document and Entity Information - shares	Mar. 31, 2016	May. 04, 2016
Document And Entity Information [Abstract]
Document Type	10-Q
Amendment Flag	false
Document Period End Date	Mar. 31, 2016
Document Fiscal Year Focus	2,016
Document Fiscal Period Focus	Q2
Trading Symbol	ESSA
Entity Registrant Name	ESSA Bancorp, Inc.
Entity Central Index Key	1,382,230
Current Fiscal Year End Date	--09-30
Entity Filer Category	Accelerated Filer
Entity Common Stock, Shares Outstanding		11,379,664

Consolidated Balance Sheet

Consolidated Balance Sheet - USD ($) $ in Thousands	Mar. 31, 2016	Sep. 30, 2015
ASSETS
Cash and due from banks	$ 20,917	$ 15,905
Interest-bearing deposits with other institutions	2,966	2,853
Total cash and cash equivalents	23,883	18,758
Certificates of deposit	1,500	1,750
Investment securities available for sale, at fair value	389,603	379,407
Loans receivable (net of allowance for loan losses of $9,415 and $8,919)	1,235,613	1,102,118
Regulatory stock, at cost	15,492	13,831
Premises and equipment, net	17,185	16,553
Bank-owned life insurance	31,119	30,655
Foreclosed real estate	2,316	2,480
Intangible assets, net	2,852	1,759
Goodwill	13,801	10,259
Deferred income taxes	11,537	11,149
Other assets	18,388	17,825
TOTAL ASSETS	1,763,289	1,606,544
LIABILITIES
Deposits	1,210,106	1,096,754
Short-term borrowings	126,243	91,339
Other borrowings	230,601	229,101
Advances by borrowers for taxes and insurance	8,514	4,273
Other liabilities	13,264	13,797
TOTAL LIABILITIES	$ 1,588,728	$ 1,435,264
STOCKHOLDERS' EQUITY
Preferred Stock ($.01 par value; 10,000,000 shares authorized, none issued)
Common stock ($.01 par value; 40,000,000 shares authorized, 18,133,095 issued; 11,367,654 and 11,353,244 outstanding at March 31, 2016 and September 30, 2015)	$ 181	$ 181
Additional paid in capital	182,021	182,295
Unallocated common stock held by the Employee Stock Ownership Plan (ESOP)	(9,400)	(9,627)
Retained earnings	85,875	83,658
Treasury stock, at cost; 6,765,441 and 6,779,851 shares outstanding at March 31, 2016 and September 30, 2015, respectively	(82,679)	(82,832)
Accumulated other comprehensive loss	(1,437)	(2,395)
TOTAL STOCKHOLDERS' EQUITY	174,561	171,280
TOTAL LIABILITIES AND STOCKHOLDERS' EQUITY	$ 1,763,289	$ 1,606,544

Consolidated Balance Sheet (Par

Consolidated Balance Sheet (Parenthetical) - USD ($) $ in Thousands	Mar. 31, 2016	Sep. 30, 2015
Statement of Financial Position [Abstract]
Allowance for loan losses	$ 9,415	$ 8,919
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	11,367,654	11,353,244
Treasury stock, shares outstanding	6,765,441	6,779,851

Consolidated Statement of Incom

Consolidated Statement of Income - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
Consolidated Statement of Income - USD ($) $ in Thousands	Mar. 31, 2016	Mar. 31, 2015	Mar. 31, 2016	Mar. 31, 2015
INTEREST INCOME
Loans receivable, including fees	$ 12,805	$ 11,100	$ 24,379	$ 22,549
Investment securities:
Taxable	1,903	1,799	3,721	3,688
Exempt from federal income tax	255	239	499	473
Other investment income	196	442	375	578
Total interest income	15,159	13,580	28,974	27,288
INTEREST EXPENSE
Deposits	1,944	1,878	3,789	3,843
Short-term borrowings	115	103	209	206
Other borrowings	816	597	1,600	1,187
Total interest expense	2,875	2,578	5,598	5,236
NET INTEREST INCOME	12,284	11,002	23,376	22,052
Provision for loan losses	600	525	1,200	975
NET INTEREST INCOME AFTER PROVISION FOR LOAN LOSSES	11,684	10,477	22,176	21,077
NONINTEREST INCOME
Service fees on deposit accounts	875	757	1,738	1,584
Services charges and fees on loans	297	274	577	589
Trust and investment fees	194	204	407	442
Gain on sale of investments	365	204	368	204
Earnings on Bank-owned life insurance	234	231	464	470
Insurance commissions	217	217	416	399
Other	95	14	124	27
Total noninterest income	2,277	1,901	4,094	3,715
NONINTEREST EXPENSE
Compensation and employee benefits	6,003	5,232	11,581	10,346
Occupancy and equipment	1,422	1,134	2,531	2,115
Professional fees	672	407	1,125	921
Data processing	1,079	892	1,998	1,705
Advertising	153	224	240	352
Federal Deposit Insurance Corporation (FDIC) premiums	322	289	600	581
(Gain)/loss on foreclosed real estate	161	(137)	151	(175)
Merger related costs			245
Amortization of intangible assets	223	163	397	329
Other	1,071	894	2,024	1,890
Total noninterest expense	11,106	9,098	20,892	18,064
Income before income taxes	2,855	3,280	5,378	6,728
Income taxes	726	848	1,292	1,700
NET INCOME	$ 2,129	$ 2,432	$ 4,086	$ 5,028
Earnings per share
Basic	$ 0.20	$ 0.23	$ 0.39	$ 0.48
Diluted	0.20	0.23	0.39	0.48
Dividends per share	$ 0.09	$ 0.09	$ 0.18	$ 0.16

Consolidated Statement of Compr

Consolidated Statement of Comprehensive Income - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Mar. 31, 2016	Mar. 31, 2015	Mar. 31, 2016	Mar. 31, 2015
Statement of Comprehensive Income [Abstract]
Net income	$ 2,129	$ 2,432	$ 4,086	$ 5,028
Investment securities available for sale:
Unrealized holding gain	4,981	2,374	1,581	5,112
Tax effect	(1,694)	(807)	(538)	(1,737)
Reclassification of gains recognized in net income	(365)	(204)	(368)	(204)
Tax effect	124	69	125	69
Net of tax amount	3,046	1,432	800	3,240
Pension plan adjustment:
Related to actuarial losses	119	60	239	120
Tax effect	(40)	(20)	(81)	(40)
Net of tax amount	79	40	158	80
Total other comprehensive income (loss)	3,125	1,472	958	3,320
Comprehensive income	$ 5,254	$ 3,904	$ 5,044	$ 8,348

Consolidated Statement of Chang

Consolidated Statement of Changes in Stockholders' Equity - 6 months ended Mar. 31, 2016 - 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, 2015	$ 171,280	$ 181	$ 182,295	$ (9,627)	$ 83,658	$ (82,832)	$ (2,395)
Beginning Balance, Shares at Sep. 30, 2015	11,353,244	11,353,244
Net income	$ 4,086				4,086
Other comprehensive income	958						958
Cash dividends declared ($.18 per share)	(1,869)				(1,869)
Stock based compensation	79		79
Allocation of ESOP stock	303		76	227
Allocation of treasury shares to incentive plan			(429)			429
Allocation of treasury shares to incentive plan, Shares		37,110
Treasury shares purchased	(276)					(276)
Treasury shares purchased, Shares		(22,700)
Ending Balance at Mar. 31, 2016	$ 174,561	$ 181	$ 182,021	$ (9,400)	$ 85,875	$ (82,679)	$ (1,437)
Ending Balance, Shares at Mar. 31, 2016	11,367,654	11,367,654

Consolidated Statement of Chan7

Consolidated Statement of Changes in Stockholders' Equity (Parenthetical)	6 Months Ended
	Mar. 31, 2016$ / shares
Cash dividends declared, per share	$ 0.18
Retained Earnings [Member]
Cash dividends declared, per share	$ 0.18

Consolidated Statement of Cash

Consolidated Statement of Cash Flows - USD ($) $ in Thousands	3 Months Ended	6 Months Ended
	Mar. 31, 2016	Mar. 31, 2016	Mar. 31, 2015
OPERATING ACTIVITIES
Net income	$ 2,129	$ 4,086	$ 5,028
Adjustments to reconcile net income to net cash provided by operating activities:
Provision for loan losses	600	1,200	975
Provision for depreciation and amortization		876	641
Amortization and accretion of discounts and premiums, net		1,750	145
Gain on sale of investment securities	(365)	(368)	(204)
Compensation expense on ESOP		303	269
Stock based compensation		79	51
(Increase) decrease in accrued interest receivable		(477)	159
Increase/(decrease) in accrued interest payable		146	(18)
Earnings on bank-owned life insurance	(234)	(464)	(470)
Deferred federal income taxes		166	(339)
Increase in accrued pension liability		590	233
(Gain)/loss on foreclosed real estate, net		151	(175)
Amortization of identifiable intangible assets	223	397	329
Other, net		(223)	1,987
Net cash provided by operating activities		8,213	8,611
INVESTING ACTIVITIES
Certificates of deposit maturities		250	15
Investment securities available for sale:
Proceeds from sale of investment securities		29,022	3,319
Proceeds from principal repayments and maturities		47,903	30,318
Purchases		(50,016)	(29,317)
Increase in loans receivable, net		(13,040)	(22,416)
Redemption of regulatory stock		6,940	7,441
Purchase of regulatory stock		(7,712)	(6,801)
Proceeds from sale of foreclosed real estate		739	2,031
Acquisition, net of cash acquired		(16,174)
Capital improvements to foreclosed real estate			13
Purchase of premises, equipment, and software		(579)	(454)
Net cash used for investing activities		(2,667)	(15,851)
FINANCING ACTIVITIES
Decrease in deposits, net		(38,921)	(30,092)
Net increase in short-term borrowings		34,904	1,981
Proceeds from other borrowings		52,300	37,860
Repayment of other borrowings		(50,800)	(9,200)
Increase in advances by borrowers for taxes and insurance		4,241	4,472
Purchase of treasury stock shares		(276)	(1,803)
Dividends on common stock		(1,869)	(1,669)
Net cash provided by (used for) financing activities		(421)	1,549
Increase (decrease) in cash and cash equivalents		5,125	(5,691)
CASH AND CASH EQUIVALENTS AT BEGINNING OF PERIOD		18,758	22,301
CASH AND CASH EQUIVALENTS AT END OF PERIOD	23,883	23,883	16,610
Cash Paid:
Interest		5,388	5,253
Income taxes		500
Noncash items:
Transfers from loans to foreclosed real estate		726	$ 1,589
Eagle National Bancorp, Inc [Member]
Noncash assets acquired
Investment securities, available for sale	36,275	36,275
Loans receivable	123,380	123,380
Federal Home Loan Bank stock		889
Premises and equipment		945
Accrued interest receivable		185
Intangible assets		1,491
Goodwill		3,542
Deferred tax assets		715
Other assets		1,989
Liabilities assumed:
Certificates of deposit	32,408	32,408
Deposits other than certificates of deposit	$ 119,865	119,865
Accrued interest payable		64
Other liabilities		900
Net noncash assets acquired		16,174
Cash acquired		$ 8,481

Nature of Operations and Basis

Nature of Operations and Basis of Presentation	6 Months Ended
Nature of Operations and Basis of Presentation	Mar. 31, 2016
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, 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 investment in subsidiary on the parent company’s financial statements is carried at the parent company’s equity in the underlying net assets. ESSACOR, Inc. is a Pennsylvania corporation that has been used to purchase properties at tax sales that represent collateral for delinquent loans of the Bank. 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 six month period ended March 31, 2016 are not necessarily indicative of the results that may be expected for the year ending September 30, 2016.

Earnings per Share

Earnings per Share	6 Months Ended
Earnings per Share	Mar. 31, 2016
Earnings Per Share [Abstract]
Earnings per Share	2. Earnings per Share The following table sets forth the composition of the weighted-average common shares (denominator) used in the basic and diluted earnings per share computation for the three and six month periods ended March 31, 2016 and 2015. Three months ended Six months ended March 31, 2016 March 31, 2015 March 31, 2016 March 31, 2015 Weighted-average common shares outstanding 18,133,095 18,133,095 18,133,095 18,133,095 Average treasury stock shares (6,793,799 ) (6,695,606 ) (6,793,553 ) (6,652,080 ) Average unearned ESOP shares (933,558 ) (978,835 ) (939,247 ) (984,555 ) Average unearned non-vested shares (20,584 ) (16,344 ) (24,681 ) (16,590 ) Weighted average common shares and common stock equivalents used to calculate basic earnings per share 10,385,154 10,442,310 10,375,614 10,479,870 Additional common stock equivalents (non-vested stock) used to calculate diluted earnings per share 444 386 — — Additional common stock equivalents (stock options) used to calculate diluted earnings per share 139,100 78,451 140,155 42,727 Weighted average common shares and common stock equivalents used to calculate diluted earnings per share 10,524,697 10,521,147 10,515,770 10,522,597 At March 31, 2016 there were 48,498 shares of nonvested stock outstanding at an average weighted price of $12.90 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, 2015 there were 15,290 shares of nonvested stock outstanding at a price of $11.07 per share and options to purchase 1,317,910 shares of common stock outstanding at a price of $12.35 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
Use of Estimates in the Preparation of Financial Statements	Mar. 31, 2016
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.

Recent Accounting Pronouncement

Recent Accounting Pronouncements	6 Months Ended
Recent Accounting Pronouncements	Mar. 31, 2016
Accounting Changes and Error Corrections [Abstract]
Recent Accounting Pronouncements	4. Recent Accounting Pronouncements: Recent Accounting Pronouncements: In May 2014, the FASB issued ASU 2014-09, Revenue from Contracts with Customers In June 2014, the FASB issued ASU 2014-12, Compensation – Stock Compensation ( Topic 718 ): Accounting for Share-Based Payments when the Terms of an Award Provide that a Performance Target Could Be Achieved After the Requisite Service Period In August 2014, the FASB issued ASU 2014-15, Presentation of Financial Statements – Going Concern (Subtopic In November 2014, the FASB issued ASU 2014-16, Derivatives and Hedging (Topic 815): Determining Whether the Host Contract in a Hybrid Financial Instrument Issued in the Form of a Share Is More Akin to Debt or to Equity (a consensus of the FASB Emerging Issues Task Force). In January 2015, the FASB issued ASU 2015-01, Income Statement – Extraordinary and Unusual Items, In February 2015, the FASB issued ASU 2015-02, Consolidation (Topic 810) In April 2015, the FASB issued ASU 2015-03, Interest – Imputation of Interest (Subtopic 835-30) In April 2015, the FASB issued ASU 2015-04, Compensation – Retirement Benefits (Topic 715), In May 2015, the FASB issued ASU 2015-09, Financial Services – Insurance (Topic 944): Disclosure About Short-Duration Contracts Financial Services – Insurance In June 2015, the FASB issued ASU 2015-10, Technical Corrections and Improvements In August 2015, the FASB issued ASU 2015-14, Revenue from Contract with Customers Topic 606 In September 2015, the FASB issued ASU 2015-16, Business Combinations (Topic 805). In November 2015, the FASB issued ASU 2015-17, Income Taxes (Topic 740): Balance Sheet Classification of Deferred Taxes In January 2016, the FASB issued ASU 2016-01, Financial Instruments – Overall (Subtopic 825-10): Recognition and Measurement of Financial Assets and Financial Liabilities In February 2016, the FASB issued ASU 2016-02, Leases (Topic 842) In March 2016, the FASB issued ASU 2016-04, Liabilities – Extinguishments of Liabilities (Subtopic 405-20). In March 2016, the FASB issued ASU 2016-05, Derivatives and Hedging (Topic 815) . In March 2016, the FASB issued ASU 2016-06, Derivatives and Hedging (Topic 815) In March 2016, the FASB issued ASU 2016-07, Investments – Equity Method and Joint Ventures (Topic 323) In March 2016, the FASB issued ASU 2016-08, Revenue from Contracts with Customers (Topic 606). Revenue from Contracts with Customers (Topic 606), Revenue from Contracts with Customers (Topic 606): Deferral of the Effective Date, In March 2016, the FASB issued ASU 2016-09, Compensation – Stock Compensation (Topic 718) Share-Based Payment In April 2016, the FASB issued ASU 2016-10, Revenue from Contracts with Customers (Topic 606). Revenue from Contracts with Customers (Topic 606) Revenue from Contracts with Customers (Topic 606)

Investment Securities

Investment Securities	6 Months Ended
Investment Securities	Mar. 31, 2016
Investments, Debt and Equity Securities [Abstract]
Investment Securities	5. Investment Securities The amortized cost, gross unrealized gains and losses, and fair value of investment securities available for sale are summarized as follows (in thousands): March 31, 2016 Amortized Cost Gross Gains Gross Unrealized Losses Fair Value Available for Sale Fannie Mae $ 134,469 $ 1,965 $ (280 ) $ 136,154 Freddie Mac 87,858 1,224 (155 ) 88,927 Governmental National Mortgage Association 14,160 88 (49 ) 14,199 Other mortgage-backed securities 2,409 — (20 ) 2,389 Total mortgage-backed securities 238,896 3,277 (504 ) 241,669 Obligations of states and political subdivisions 55,272 2,324 (22 ) 57,574 U.S. government agency securities 32,968 363 (25 ) 33,306 Corporate obligations 34,852 411 (367 ) 34,896 Trust-preferred securities 1,628 — (18 ) 1,610 Other debt securities 20,310 286 (73 ) 20,523 Total debt securities 383,926 6,661 (1,009 ) 389,578 Equity securities - financial services 25 — — 25 Total $ 383,951 $ 6,661 $ (1,009 ) $ 389,603 September 30, 2015 Amortized Cost Gross Unrealized Gains Gross Unrealized Losses Fair Value Available for Sale Fannie Mae $ 130,476 $ 2,052 $ (541 ) $ 131,987 Freddie Mac 88,514 1,063 (286 ) 89,291 Governmental National Mortgage Association 13,201 103 (52 ) 13,252 Other mortgage-backed securities 2,494 — (17 ) 2,477 Total mortgage-backed securities 234,685 3,218 (896 ) 237,007 Obligations of states and political subdivisions 50,094 1,676 (145 ) 51,625 U.S. government agency securities 45,799 399 (12 ) 46,186 Corporate obligations 22,440 157 (237 ) 22,360 Trust-preferred securities 1,613 98 — 1,711 Other debt securities 20,313 216 (36 ) 20,493 Total debt securities 374,944 5,764 (1,326 ) 379,382 Equity securities - financial services 25 — — 25 Total $ 374,969 $ 5,764 $ (1,326 ) $ 379,407 The amortized cost and fair value of debt securities at March 31, 2016, by contractual maturity, are shown below. Expected maturities will differ from contractual maturities because borrowers may have the right to call or prepay obligations with or without call or prepayment penalties (in thousands): Available For Sale Amortized Cost Fair Value Due in one year or less $ 3,253 $ 3,264 Due after one year through five years 51,173 51,920 Due after five years through ten years 80,458 81,861 Due after ten years 249,042 252,533 Total $ 383,926 $ 389,578 For the three months ended March 31, 2016, the Company realized gross gains of $365,000 on proceeds from the sale of investment securities of $11.7 million. For the six months ended March 31, 2016, the Company realized gross gains of $368,000 on proceeds from the sale of investment securities of $29.0 million. During the first quarter of 2016, the Company sold $16.2 million of investment securities which were acquired in the merger with Eagle National Bancorp, Inc (“ENB”). The Company realized no gain or loss from the sale of these securities. For the three and six months ended March 31, 2015, the Company realized gross gains of $204,000 on proceeds from the sale of investment securities of $3.3 million.

Unrealized Losses on Securities

Unrealized Losses on Securities	6 Months Ended
Unrealized Losses on Securities	Mar. 31, 2016
Text Block [Abstract]
Unrealized Losses on Securities	6. Unrealized Losses on Securities The following table shows 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, 2016 Number of Securities Less than Twelve Months Twelve Months or Greater Total Fair Value Gross Unrealized Losses Fair Value Gross Unrealized Fair Value Gross Fannie Mae 20 $ 7,962 $ (14 ) $ 19,159 $ (266 ) $ 27,121 $ (280 ) Freddie Mac 11 1,489 (9 ) 12,964 (146 ) 14,453 (155 ) Governmental National Mortgage Association 5 4,392 (46 ) 863 (3 ) 5,255 (49 ) Other mortgage-backed securities 3 — — 2,388 (20 ) 2,388 (20 ) Obligations of states and political subdivisions 6 7,867 (22 ) — — 7,867 (22 ) U.S. government agency securities 2 1,894 (25 ) — — 1,894 (25 ) Corporate obligations 11 10,482 (330 ) 963 (37 ) 11,445 (367 ) Trust-preferred securities 2 1,610 (18 ) — — 1,610 (18 ) Other debt securities 8 5,386 (45 ) 2,542 (28 ) 7,928 (73 ) Total 68 $ 41,082 $ (509 ) $ 38,879 $ (500 ) $ 79,961 $ (1,009 ) September 30, 2015 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 22 $ 7,238 $ (28 ) $ 23,609 $ (513 ) $ 30,847 $ (541 ) Freddie Mac 12 1,487 (1 ) 15,477 (285 ) 16,964 (286 ) Governmental National Mortgage Association 2 — — 2,209 (52 ) 2,209 (52 ) Other mortgage-backed securities 3 — — 2,477 (17 ) 2,477 (17 ) Obligations of states and political subdivisions 14 9,184 (57 ) 4,667 (88 ) 13,851 (145 ) U.S. government agency securities 3 3,246 (12 ) — — 3,246 (12 ) Corporate obligations 10 9,263 (207 ) 970 (30 ) 10,233 (237 ) Other debt securities 6 5,232 (26 ) 1,748 (10 ) 6,980 (36 ) Total 72 $ 35,650 $ (331 ) $ 51,157 $ (995 ) $ 86,807 $ (1,326 ) 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, corporate debt obligations, trust preferred securities and equity securities. The Company reviews its position quarterly and has asserted that at March 31, 2016, the declines outlined in the above table represent temporary declines and the Company would not be required to sell the security before its anticipated recovery in market value. The Company has concluded that any impairment of its investment securities portfolio 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
Loans Receivable, Net and Allowance for Loan Losses	Mar. 31, 2016
Receivables [Abstract]
Loans Receivable, Net and Allowance for Loan Losses	7. Loans Receivable, Net and Allowance for Loan Losses Loans receivable consist of the following (in thousands): March 31, 2016 September 30, 2015 Real estate loans: Residential $ 602,085 $ 610,582 Construction 3,135 878 Commercial 286,684 200,004 Commercial 55,170 34,314 Obligations of states and political subdivisions 59,673 59,820 Home equity loans and lines of credit 46,613 39,903 Auto Loans 188,334 162,193 Other 3,334 3,343 1,245,028 1,111,037 Less allowance for loan losses 9,415 8,919 Net loans $ 1,235,613 $ 1,102,118 Included in the March 31, 2016 balances are loans acquired from Eagle National Bank, as of the acquisition date of December 4, 2015 as follows: 2015 Real estate loans: Residential $ 10,743 Commercial 87,336 Commercial 16,604 Home equity loans and lines of credit 8,632 Other 65 Total loans $ 123,380 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. Upon acquisition, the Company evaluated whether each acquired loan (regardless of size) was within the scope of ASC 310-30, Receivables-Loans and Debt Securities Acquired with Deteriorated Credit Quality. Purchased credit-impaired loans are loans that have evidence of credit deterioration since origination and it is probable at the date of acquisition that the Company will not collect all contractually required principal and interest payments. The fair value of purchased credit-impaired loans, on the acquisition date of December 4, 2015, was determined, primarily based on the fair value of loan collateral. The carrying value of all purchased loans acquired with deteriorated credit quality was $6.0 million at March 31, 2016. On the acquisition date, the preliminary estimate of the unpaid principal balance for all loans evidencing credit impairment acquired in the ENB acquisition was $3.5 million and the estimated fair value of the loans was $2.0 million. Total contractually required payments on these loans, including interest, at the acquisition date was $4.2 million. However, the Company’s preliminary estimate of expected cash flows was $2.2 million. At such date, the Company established a credit risk related non-accretable discount (a discount representing amounts which are not expected to be collected from the customer nor liquidation of collateral) of $2.0 million relating to these impaired loans, reflected in the recorded net fair value. Such amount is reflected as a non-accretable fair value adjustment to loans. The Company further estimated the timing and amount of expected cash flows in excess of the estimated fair value and established an accretable discount of $240,000 on the acquisition date relating to these impaired loans. The carrying value of the loans acquired and accounted for in accordance with ASC 310-30, Loans and Debt Securities Acquired with Deteriorated Credit Quality Unpaid principal balance $ 3,468 Interest 717 Contractual cash flows 4,185 Non-accretable discount (1,973 ) Expected cash flows 2,212 Accretable discount (240 ) Estimated fair value $ 1,972 Changes in the accretable yield for purchased credit-impaired loans were as follows, since acquisition, for the periods ended March 31, 2016 and March 31, 2015: Six months ended March 31, 2016 2015 Balance at beginning of period $ 258 $ 170 Reclassification, new additions and other 240 — Accretion (133 ) (14 ) Balance at end of period $ 365 $ 156 The following table presents additional information regarding loans acquired and accounted for in accordance with ASC 310-30 (in thousands): March 31, 2016 September 30, 2015 Acquired Loans with Specific Acquired Loans with Specific Outstanding balance $ 7,622 $ 4,779 Carrying amount $ 5,995 $ 4,162 The following table shows the amount of loans in each category that was individually and collectively evaluated for impairment at the dates indicated (in thousands): Total Loans Individually Loans Acquired Collectively March 31, 2016 Real estate loans: Residential $ 602,085 $ 10,008 $ — $ 592,077 Construction 3,135 — — 3,135 Commercial 286,684 13,679 4,958 268,047 Commercial 55,170 1,939 411 52,820 Obligations of states and political subdivisions 59,673 — — 59,673 Home equity loans and lines of credit 46,613 640 626 45,347 Auto loans 188,334 707 — 187,627 Other 3,334 2 — 3,332 Total $ 1,245,028 $ 26,975 $ 5,995 $ 1,212,058 Total Loans Individually Loans Acquired Collectively September 30, 2015 Real estate loans: Residential $ 610,582 $ 11,985 $ — $ 598,597 Construction 878 — — 878 Commercial 200,004 15,100 4,108 180,796 Commercial 34,314 204 54 34,056 Obligations of states and political subdivisions 59,820 — — 59,820 Home equity loans and lines of credit 39,903 795 — 39,108 Auto loans 162,193 625 — 161,568 Other 3,343 — — 3,343 Total $ 1,111,037 $ 28,709 $ 4,162 $ 1,078,166 We maintain 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. We do 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 because of the borrower’s financial condition that it would not otherwise consider. Such concessions include the reduction of interest rates, forgiveness of principal or interest, or other modifications of interest rates that are less than the current market rate for new obligations with similar risk. TDR loans that are in compliance with their modified terms and that yield a market rate may be removed from the TDR status after one year of performance. The following table includes the recorded investment and unpaid principal balances for impaired loans with the associated allowance amount, if applicable (in thousands): Recorded Unpaid Associated March 31, 2016 With no specific allowance recorded: Real estate loans Residential $ 7,344 $ 9,071 $ — Construction — — — Commercial 11,944 13,862 — Commercial 1,939 1,954 — Obligations of states and political subdivisions — — — Home equity loans and lines of credit 583 642 — Auto loans 275 395 — Other 2 25 — Total 22,087 25,949 — With an allowance recorded: Real estate loans Residential 2,664 3,067 343 Construction — — — Commercial 1,735 1,883 170 Commercial — — — Obligations of states and political subdivisions — — — Home equity loans and lines of credit 57 106 56 Auto loans 432 432 191 Other — — — Total 4,888 5,488 760 Total: Real estate loans Residential 10,008 12,138 343 Construction — — — Commercial 13,679 15,745 170 Commercial 1,939 1,954 — Obligations of states and political subdivisions — — — Home equity loans and lines of credit 640 748 56 Auto loans 707 827 191 Other 2 25 — Total Impaired Loans $ 26,975 $ 31,437 $ 760 Recorded Unpaid Associated September 30, 2015 With no specific allowance recorded: Real Estate Loans Residential $ 9,552 $ 11,521 $ — Construction — — — Commercial 15,100 16,316 — Commercial 204 216 — Obligations of states and political subdivisions — — — Home equity loans and lines of credit 731 743 — Auto Loans 350 464 — Other — — — Total 25,937 29,260 — With an allowance recorded: Real Estate Loans Residential 2,433 2,639 373 Construction — — — Commercial — — — Commercial — — — Obligations of states and political subdivisions — — — Home equity loans and lines of credit 64 93 64 Auto Loans 275 275 131 Other — — — Total 2,772 3,007 568 Total: Real Estate Loans Residential 11,985 14,160 373 Construction — — — Commercial 15,100 16,316 — Commercial 204 216 — Obligations of states and political subdivisions — — — Home equity loans and lines of credit 795 836 64 Auto Loans 625 739 131 Other — — — Total Impaired Loans $ 28,709 $ 32,267 $ 568 The following table represents the average recorded investments in the impaired loans and the related amount of interest recognized during the time within the period that the impaired loans were impaired (in thousands): Three months ended March 31, 2016 2015 2016 2015 Average Average Interest Interest With no specific allowance recorded: Real estate loans Residential $ 7,296 $ 10,551 $ 22 $ 64 Construction — — — — Commercial 12,128 15,247 131 190 Commercial 1,919 343 37 2 Obligations of states and political subdivisions — — — — Home equity loans and lines of credit 594 266 — — Auto loans 228 55 — 1 Other — — — — Total 22,165 26,462 190 257 With an allowance recorded: Real estate loans Residential 2,679 2,411 4 19 Construction — — — — Commercial 1,490 313 — — Commercial 6 — — — Obligations of states and political subdivisions — — — — Home equity loans and lines of credit 59 39 — — Auto loans 222 67 2 1 Other 1 — — — Total 4,457 2,830 6 20 Total: Real estate loans Residential 9,975 12,962 26 83 Construction — — — — Commercial 13,618 15,560 131 190 Commercial 1,925 343 37 2 Obligations of states and political subdivisions — — — — Home equity loans and lines of credit 653 305 — — Auto loans 450 122 2 2 Other 1 — — — Total Impaired Loans $ 26,622 $ 29,292 $ 196 $ 277 Six months ended March 31, 2016 2015 2016 2015 Average Average Interest Interest With no specific allowance recorded: Real estate loans Residential $ 8,040 $ 10,740 $ 48 $ 163 Construction — — — — Commercial 12,908 15,446 307 384 Commercial 1,350 334 52 4 Obligations of states and political subdivisions — — — — Home equity loans and lines of credit 672 234 2 2 Auto loans 255 53 2 1 Other — — — — Total 23,225 26,807 411 554 With an allowance recorded: Real estate loans Residential 2,636 2,453 9 43 Construction — — — — Commercial 974 442 — — Commercial 4 — — — Obligations of states and political subdivisions — — — — Home equity loans and lines of credit 66 26 — — Auto loans 181 101 3 3 Other — — — — Total 3,861 3,022 12 46 Total: Real estate loans Residential 10,676 13,193 57 206 Construction — — — — Commercial 13,882 15,888 307 384 Commercial 1,354 334 52 4 Obligations of states and political subdivisions — — — — Home equity loans and lines of credit 738 260 2 2 Auto loans 436 154 5 4 Other — — — — Total Impaired Loans $ 27,086 $ 29,829 $ 423 $ 600 The Company uses a ten-point internal risk-rating system to monitor the credit quality of the overall loan portfolio. The first six categories are considered not criticized and are aggregated as Pass-rated. The criticized rating categories utilized by management generally follow bank regulatory definitions. The Special Mention category includes assets that are fundamentally sound yet, exhibit potentially unacceptable credit risk or deteriorating trends or characteristics which if left uncorrected, may result in deterioration of the repayment prospects for the asset or in the Company’s credit position at some future date. Loans in the Substandard category have well-defined weaknesses that jeopardize the liquidation of the debt and have a distinct possibility that some loss will be sustained if the weaknesses are not corrected. All loans greater than 90 days past due are considered Substandard. Loans in the Doubtful category have all the weaknesses inherent in one classified Substandard with the added characteristic that the weaknesses make collection or liquidation in full, on the basis of currently existing facts, conditions, and values, highly questionable and improbable. Loans in the Loss category are considered uncollectible and of little value that their continuance as bankable assets is not warranted. 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 of 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 $500,000 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 within the internal risk rating system as of March 31, 2016 and September 30, 2015 (in thousands): Pass Special Substandard Doubtful Total March 31, 2016 Commercial real estate loans $ 254,939 $ 10,578 $ 21,167 $ — $ 286,684 Commercial 51,561 330 3,279 — 55,170 Obligations of states and political subdivisions 59,673 — — — 59,673 Total $ 366,173 $ 10,908 $ 24,446 $ — $ 401,527 Pass Special Substandard Doubtful Total September 30, 2015 Commercial real estate loans $ 174,516 $ 4,521 $ 20,967 $ — $ 200,004 Commercial 33,801 — 513 — 34,314 Obligations of states and political subdivisions 59,820 — — — 59,820 Total $ 268,137 $ 4,521 $ 21,480 $ — $ 294,138 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, 2016 and September 30, 2015 (in thousands): Performing Non-performing Total March 31, 2016 Real estate loans: Residential $ 592,400 $ 9,685 $ 602,085 Construction 3,135 — 3,135 Home equity loans and lines of credit 45,322 1,291 46,613 Auto loans 187,738 596 188,334 Other 3,297 37 3,334 Total $ 831,892 $ 11,609 $ 843,501 Performing Non-performing Total September 30, 2015 Real estate loans: Residential $ 600,810 $ 9,772 $ 610,582 Construction 878 — 878 Home equity loans and lines of credit 39,213 690 39,903 Auto loans 161,827 366 162,193 Other 3,322 21 3,343 Total $ 806,050 $ 10,849 $ 816,899 Management 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, 2016 and September 30, 2015 (in thousands): Current 31-60 Days 61-90 Days Greater than Non-Accrual Total Past Total March 31, 2016 Real estate loans Residential $ 590,617 $ 1,321 $ 462 $ — $ 9,685 $ 11,468 $ 602,085 Construction 3,135 — — — — — 3,135 Commercial 275,800 214 157 — 10,513 10,884 286,684 Commercial 54,598 98 — — 474 572 55,170 Obligations of states and political subdivisions 59,673 — — — — — 59,673 Home equity loans and lines of credit 45,109 121 92 — 1,291 1,504 46,613 Auto loans 186,764 852 122 — 596 1,570 188,334 Other 3,255 42 — — 37 79 3,334 Total $ 1,218,951 $ 2,648 $ 833 $ — $ 22,596 $ 26,077 $ 1,245,028 Current 31-60 Days Past Due 61-90 Days Past Due Greater than Non-Accrual Total Past Total September 30, 2015 Real estate loans Residential $ 598,190 $ 1,575 $ 1,045 $ — $ 9,772 $ 12,392 $ 610,582 Construction 878 — — — — — 878 Commercial 190,440 137 587 — 8,840 9,564 200,004 Commercial 33,545 346 7 — 416 769 34,314 Obligations of states and political subdivisions 59,820 — — — — — 59,820 Home equity loans and lines of credit 39,136 32 45 — 690 767 39,903 Auto loans 160,272 1,375 180 — 366 1,921 162,193 Other 3,295 27 — — 21 48 3,343 Total $ 1,085,576 $ 3,492 $ 1,864 $ — $ 20,105 $ 25,461 $ 1,111,037 Our 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. Our 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, 2016 is maintained at a level that represents management’s best estimate of losses inherent in the loan portfolio, and such losses were both probable and reasonably estimable. In addition, the FDIC and the Pennsylvania Department of Banking 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 ALL. When information confirms all or part of specific loans to be uncollectible, these amounts are promptly charged off against the ALL. The following tables summarize changes in the primary segments of the ALL for the three and six month periods ending March 31, 2016 and 2015 (in thousands): Real Estate Loans Residential Construction Commercial Commercial Obligations of Home Auto Loans Other Unallocated Total ALL balance at December 31, 2015 $ 4,747 $ 14 $ 858 $ 705 $ 187 $ 389 $ 1,754 $ 27 $ 576 $ 9,257 Charge-offs (308 ) — (9 ) — — (29 ) (234 ) — — (580 ) Recoveries — — 52 — — 3 80 3 — 138 Provision 216 10 67 33 9 26 325 (5 ) (81 ) 600 ALL balance at March 31, 2016 $ 4,655 $ 24 $ 968 $ 738 $ 196 $ 389 $ 1,925 $ 25 $ 495 $ 9,415 ALL balance at December 31, 2014 $ 5,571 $ 13 $ 676 $ 515 $ 145 $ 545 $ 674 $ 26 $ 351 $ 8,516 Charge-offs (251 ) — (42 ) — — — (125 ) — — (418 ) Recoveries 4 — 20 9 — 4 8 — — 45 Provision (35 ) 4 189 111 (58 ) (81 ) 466 4 (75 ) 525 ALL balance at March 31, 2015 $ 5,289 $ 17 $ 843 $ 635 $ 87 $ 468 $ 1,023 $ 30 $ 276 $ 8,668 Real Estate Loans Residential Construction Commercial Commercial Obligations of Home Auto Loans Other Unallocated Total ALL balance at September 30, 2015 $ 5,140 $ 7 $ 671 $ 693 $ 189 $ 461 $ 1,570 $ 27 $ 161 $ 8,919 Charge-offs (399 ) — (9 ) (3 ) — (54 ) (422 ) — — (887 ) Recoveries 3 — 52 1 — 4 117 6 — 183 Provision (89 ) 17 254 47 7 (22 ) 660 (8 ) 334 1,200 ALL balance at March 31, 2016 $ 4,655 $ 24 $ 968 $ 738 $ 196 $ 389 $ 1,925 $ 25 $ 495 $ 9,415 ALL balance at September 30, 2014 $ 5,573 $ 11 $ 663 $ 528 $ 163 $ 470 $ 459 $ 32 $ 735 $ 8,634 Charge-offs (760 ) — (53 ) (27 ) — (19 ) (165 ) — — (1,024 ) Recoveries 22 — 31 9 — 12 9 — — 83 Provision 454 6 202 125 (76 ) 5 720 (2 ) (459 ) 975 ALL balance at March 31, 2015 $ 5,289 $ 17 $ 843 $ 635 $ 87 $ 468 $ 1,023 $ 30 $ 276 $ 8,668 Acquired loans are recorded at fair value on their purchase date without a carryover of the related allowance for loan losses. The following table summarizes the primary segments of the ALL, segregated into amount required for loans individually evaluated for impairment and the amount required for loans collectively evaluated for impairment as of March 31, 2016 and September 30, 2015 (in thousands): Real Estate Loans Residential Construction Commercial Commercial Obligations of Home Auto Loans Other Unallocated Total Individually evaluated for impairment $ 343 $ — $ 170 $ 0 $ — $ 56 $ 191 $ — $ — $ 760 Collectively evaluated for impairment 4,312 24 798 738 196 333 1,734 25 495 8,655 ALL Balance at March 31, 2016 $ 4,655 $ 24 $ 968 $ 738 $ 196 $ 389 $ 1,925 $ 25 $ 495 $ 9,415 Individually evaluated for impairment $ 373 $ — $ — $ — $ — $ 64 $ 131 $ — $ — $ 568 Collectively evaluated for impairment 4,767 7 671 693 189 397 1,439 27 161 8,351 ALL balance at September 30, 2015 $ 5,140 $ 7 $ 671 $ 693 $ 189 $ 461 $ 1,570 $ 27 $ 161 $ 8,919 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. The Company allocated increased provisions to residential real estate, construction loan, commercial real estate, commercial loans, obligations of states and political subdivisions and home equity loans and lines of credit for the three month period ending March 31, 2016 due to increased balances and impairment evaluations in those segments. The Company allocated decreased provisions to other loans for the three month period ending March 31, 2016 due primarily to decreased loan balances. The Company allocated increased provisions in auto loans due to increased loan balances, increased classified assets and increased charge off activity. Despite the above allocations, the allowance for loan losses is general in nature and is available to absorb losses from any loan segment. The Company allocated decreased provisions to residential real estate, home equity loans and lines of credit and other loans for the six month period ending March 31, 2016 due to declining loan balances and impairment evaluations in those segments. The Company allocated increased provisions to commercial real estate, obligations of states and political subdivisions, commercial loans and construction loans for the six month period ending March 31, 2016 due primarily to increased loan balances and increased classified assets. The Company allocated increased provisions in auto loans due to increased loan balances, increased classified assets and increased charge off activity. Despite the above allocations, the allowance for loan losses is general in nature and is available to absorb losses from any loan segment. The following is a summary of troubled debt restructuring granted during the three and six months ended March 31, 2016 and 2015 (dollars in thousands). For the Three Months Ended March 31, 2016 Dollars in thousands Number of Pre-Modification Post-Modification Troubled Debt Restructurings Real estate loans: Residential 3 $ 587 $ 587 Construction — — — Commercial 1 77 77 Commercial — — — Obligations of states and political subdivisions — — — Home equity loans and lines of credit — — — Auto loans — — — Other — — — Total 4 $ 664 $ 664 For the Three Months Ended March 31, 2015 Dollars in thousands Number of Pre-Modification Post-Modification Recorded Troubled Debt Restructurings Real estate loans: Residential 2 $ 408 $ 408 Construction — — — Commercial — — — Commercial — — — Obligations of states and political subdivisions — — — Home equity loans and lines of credit 1 150 150 Auto loans — — — Other — — — Total 3 $ 558 $ 558 For the Six Months Ended March 31, 2016 Dollars in thousands Number of Pre-Modification Post-Modification Troubled Debt Restructurings Real estate loans: Residential 4 $ 668 $ 668 Construction — — — Commercial — — — Commercial — — — Obligations of states and political subdivisions — — — Home equity loans and lines of credit 1 77 77 Auto loans — — — Other — — — Total 5 $ 745 $ 745 For the Six Months Ended March 31, 2016 Dollars in thousands Number of Pre-Modification Post-Modification Troubled Debt Restructurings Real estate loans: Residential 9 $ 1,474 $ 1,474 Construction — — — Commercial — — — Commercial — — — Obligations of states and political subdivisions — — — Home equity loans and lines of credit 1 150 150 Auto loans — — — Other — — — Total 10 $ 1,624 $ 1,624 Of the four new troubled debt restructurings granted for the three months ended March 31, 2016, two loans totaling $572,000 were granted term and rate concessions, one loans totaling $15,000 was granted term concessions and one loan totaling $77,000 was granted a rate concession. Of the three new troubled debt restructurings granted for the three months ended March 31, 2015, two loans totaling $408,000 were granted terms and rate concessions and one loan totaling $150,000 was granted terms concessions. Of the five new troubled debt restructurings granted for the six months ended March 31, 2016, two loans totaling $572,000 were granted term and rate concessions, two loans totaling $96,000 were granted term concessions and one loan totaling $77,000 was granted a rate concession. Of the ten new troubled debt restructurings granted for the six months ended March 31, 2015, five loans totaling $762,000 were granted terms and rate concessions, three loans totaling $496,000 were granted terms concessions and two loans totaling $366,000 were granted rate concessions (dollars in thousands). For the three and six months ended March 31, 2016, no loans defaulted on a restructuring agreement within one year of modification. For the three months ended March 31, 2015, three residential real estate loans totaling $521,000 defaulted on a restructuring agreement within one year of modification. For the six months ended March 31, 2015, four residential real estate loans totaling $677,000 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 other assets on the Consolidated Balance Sheet. As of March 31, 2016 and September 30, 2015 included with other assets are $2.3 million and $2.5 million, respectively, of foreclosed assets. As of March 31, 2016, included within the foreclosed assets is $1.9 million of consumer residential mortgages that were foreclosed on or received via a deed in lieu transaction prior to the period end. As of March 31, 2016, the Company has initiated formal foreclosure proceedings on $4.7 million of consumer residential mortgages which have not yet been transferred into foreclosed assets.

Deposits

Deposits	6 Months Ended
Deposits	Mar. 31, 2016
Banking and Thrift [Abstract]
Deposits	8. Deposits Deposits consist of the following major classifications (in thousands): March 31, 2016 September 30, 2015 Non-interest bearing demand accounts $ 150,593 $ 98,514 Interest bearing demand accounts 107,563 110,268 Money market accounts 202,786 162,418 Savings and club accounts 143,406 129,227 Certificates of deposit 605,758 596,327 Total $ 1,210,106 $ 1,096,754

Net Periodic Benefit Cost-Defin

Net Periodic Benefit Cost-Defined Benefit Plan	6 Months Ended
Net Periodic Benefit Cost-Defined Benefit Plan	Mar. 31, 2016
Compensation and Retirement Disclosure [Abstract]
Net Periodic Benefit Cost-Defined Benefit Plan	9. Net Periodic Benefit Cost-Defined Benefit Plan For a detailed disclosure on the Bank’s pension and employee benefits plans, please refer to Note 13 of the Company’s Consolidated Financial Statements for the year ended September 30, 2015 included in the Company’s Form 10-K. The following table comprises the components of net periodic benefit cost for the periods ended (in thousands): Three Months Ended Six Months Ended 2016 2015 2016 2015 Service Cost $ 249 $ 218 $ 498 $ 436 Interest Cost 245 206 490 412 Expected return on plan assets (311 ) (308 ) (622 ) (616 ) Amortization of unrecognized loss 119 60 239 120 Net periodic benefit cost $ 302 $ 176 $ 605 $ 352 The Bank plans to contribute $650,000 to its pension plan in June 2016.

Equity Incentive Plan

Equity Incentive Plan	6 Months Ended
Equity Incentive Plan	Mar. 31, 2016
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]
Equity Incentive Plan	10. Equity Incentive Plan The Company maintained the ESSA Bancorp, Inc. 2007 Equity Incentive Plan (the “Plan”). The Plan provided for a total of 2,377,326 shares of common stock for issuance upon the grant or exercise of awards. Of the shares available under the Plan, 1,698,090 may be issued in connection with the exercise of stock options and 679,236 may 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 are granted at no less than the fair value of the Company’s common stock on the date of the grant. The Company replaced the 2007 Equity Incentive Plan with the ESSA Bancorp, Inc. 2016 Equity Incentive Plan (the “2016 Plan”). The 2016 Plan provides for a total of 250,000 shares of common stock for issuance upon the grant or exercise of awards. The 2016 Plan allows for the granting of restricted stock, restricted stock units, incentive stock options and non-qualified stock options. Certain officers, employees and outside directors were granted in aggregate 1,140,469 NSOs; 317,910 ISOs; and 590,320 shares of restricted stock on May 23, 2008. Certain officers were granted in aggregate 30,000 shares of restricted stock on April 1, 2013, 19,880 of restricted stock on July 22, 2014, 21,843 shares of restricted stock on May 20, 2015 and 23,491 shares of restricted stock on March 4, 2016. In accordance with generally accepted accounting principles , The Company classifies share-based compensation for employees and outside directors within “Compensation and employee benefits” in the Consolidated Statement of Income to correspond with the same line item as compensation paid. Additionally, generally accepted accounting principles require the Company to report: (1) the expense associated with the grants as an adjustment to operating cash flows and (2) any benefits of realized tax deductions in excess of previously recognized tax benefits on compensation expense as a financing cash flow. Stock options vest over a five-year service period and expire ten years after grant date. The Company recognizes compensation expense for the fair values of these awards, which vest on a straight-line basis over the requisite service period of the awards. The 2013 restricted stock shares vested over an 18-month service period. The 2014 restricted shares vest over a 39 month service period. The 2015 restricted shares vest over a 40 month service period. The 2016 restricted shares vest over a 43 month service period. The product of the number of shares granted and the grant date market price of the Company’s common stock determines the fair value of restricted shares under the Company’s restricted stock plan. The Company recognizes compensation expense for the fair value of restricted shares on a straight-line basis over the requisite service period for the entire award. For the six months ended March 31, 2016 and 2015, the Company recorded $204,000 and $51,000 of share-based compensation expense, respectively, comprised of restricted stock expense. Expected future compensation expense relating to the 9,932 (2014 shares) restricted shares, at March 31, 2016 is $102,000 over the remaining vesting period of 1.50 years. Expected future compensation expense relating to the 16,379 restricted shares (2015 shares) at March 31, 2016 is $214,000 over the remaining vesting period of 2.5 years. Expected future compensation expense relating to the 23,491 restricted shares (2016 shares) at March 31, 2016 is $310,000 over the remaining vesting period of 3.5 years. The following is a summary of the Company’s stock option activity and related information for its option grants for the three month period ended March 31, 2016. Number of Stock Options Weighted- average Exercise Price Weighted- average Remaining Contractual Term (in years) Aggregate Intrinsic Value (in thousands) Outstanding, September 30, 2015 1,314,580 $ 12.35 2.67 $ 802,000 Granted — — — — Exercised (140,254 ) 12.35 2.17 — Forfeited — — — — Outstanding, March 31, 2016 1,174,326 $ 12.35 2.17 $ 1,339,000 Exercisable at March 31, 2016 1,174,326 $ 12.35 2.17 $ 1,339,000 The following is a summary of the status of the Company’s restricted stock as of March 31, 2016, and changes therein during the three month period then ended: Number of Restricted Stock Weighted- Grant Date Nonvested at September 30, 2015 26,311 $ 12.30 Granted 23,491 13.52 Vested — — Forfeited — — Nonvested at March 31, 2016 49,802 $ 12.88

Fair Value Measurement

Fair Value Measurement	6 Months Ended
Fair Value Measurement	Mar. 31, 2016
Fair Value Disclosures [Abstract]
Fair Value Measurement	11. Fair Value Measurement 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. The following table presents information about the Company’s securities, other real estate owned and impaired loans measured at fair value as of March 31, 2016 and September 30, 2015 and indicates the fair value hierarchy of the valuation techniques utilized by the Bank to determine such fair value: Fair Value Measurement at March 31, 2016 Fair Value Measurements Utilized for the Company’s Financial Assets (in thousands): Quoted Prices in Active Significant Other Significant Balances as of Securities available-for-sale measured on a recurring basis Mortgage backed securities $ — $ 241,669 $ — $ 241,669 Obligations of states and political subdivisions — 57,574 — 57,574 U.S. government agencies — 33,306 — 33,306 Corporate obligations — 29,934 4,962 34,896 Trust-preferred securities — — 1,610 1,610 Other debt securities — 20,023 500 20,523 Equity securities-financial services 25 — — 25 Total debt and equity securities $ 25 $ 382,506 $ 7,072 $ 389,603 Assets measured at fair value on a nonrecurring basis: Foreclosed real estate owned measured on a non-recurring basis $ — $ — $ 2,316 $ 2,316 Impaired loans measured on a non-recurring basis $ — $ — $ 26,215 $ 26,215 Mortgage servicing rights $ — $ — $ 512 $ 512 Fair Value Measurement at September 30, 2015 Fair Value Measurements Utilized for the Company’s Financial Assets (in thousands): Quoted Prices in Active Significant Other Significant Balances as of Securities available-for-sale measured on a recurring basis Mortgage backed securities $ — $ 237,007 $ — $ 237,007 Obligations of states and political subdivisions — 51,625 — 51,625 U.S. government agencies — 46,186 — 46,186 Corporate obligations — 20,360 2,000 22,360 Trust-preferred securities — — 1,711 1,711 Other debt securities — 19,993 500 20,493 Equity securities-financial services 25 — — 25 Total debt and equity securities $ 25 $ 375,171 $ 4,211 $ 379,407 Assets measured at fair value on a nonrecurring basis: Foreclosed real estate owned measured on a non-recurring basis $ — $ — $ 2,480 $ 2,480 Impaired loans measured on a non-recurring basis $ — $ — $ 28,141 $ 28,141 Mortgage Servicing rights $ — $ — $ 412 $ 412 The following table presents a summary of changes in the fair value of the Company’s Level III investments for the three and six month periods ended March 31, 2016 and 2015 (in thousands). Fair Value Measurement Using Significant Unobservable Inputs Three months ended March 31, 2016 March 31, 2015 Beginning balance $ 7,136 $ 2,200 Purchases, sales, issuances, settlements, net — 2,000 Total unrealized gain: Included in earnings — — Included in other comprehensive income (64 ) 40 Transfers in and/or out of Level III — — $ 7,072 $ 4,240 Fair Value Measurement Using Significant Unobservable Inputs Six months ended March 31, 2016 March 31, 2015 Beginning balance $ 4,211 $ 2,230 Purchases, sales, issuances, settlements, net 3,000 2,000 Total unrealized gain: Included in earnings — — Included in other comprehensive income (139 ) 10 Transfers in and/or out of Level III — — $ 7,072 $ 4,240 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 comparables. Multiples might lie in ranges with a different multiple for each comparable. The selection of where within the range the appropriate multiple falls requires judgment, considering factors specific to the measurement (qualitative and quantitative). Valuation techniques consistent with the market approach include matrix pricing. Matrix pricing is a mathematical technique used principally to value debt securities without relying exclusively on quoted prices for the specific securities, but rather by relying on a security’s relationship to other benchmark quoted securities. Most of the securities classified as available for sale are reported at fair value utilizing Level 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, most of these are classified as available for sale and are reported at fair value using Level 3 inputs. 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, 2016, 208 impaired loans with a carrying value of $27.0 million were reduced by specific valuation allowance totaling $760,000 resulting in a net fair value of $26.2 million based on Level 3 inputs. At September 30, 2015, 211 impaired loans with a carrying value of $28.7 million were reduced by a specific valuation totaling $568,000 resulting in a net fair value of $28.1 million based on Level 3 inputs. The following table presents additional quantitative information about assets measured at fair value on a nonrecurring basis and for which the Company has utilized Level 3 inputs to determine fair value: Quantitative Information about Level 3 Fair Value Measurements (in thousands) Fair Value Estimate Valuation Techniques Unobservable Input Range March 31, 2016 Impaired loans $ 26,215 Appraisal of Appraisal 0% to 50% Foreclosed real estate owned 2,316 Appraisal of Appraisal 20% to 49% Mortgage servicing rights 512 Discounted cash flow Discount rate 6% to 11% Prepayment speeds 7% to 81% Quantitative Information about Level 3 Fair Value Measurements (in thousands) Fair Value Estimate Valuation Techniques Unobservable Input Range September 30, 2015 Impaired loans $ 28,141 Appraisal of Appraisal 0% to 60% Foreclosed real estate owned 2,480 Appraisal of Appraisal 20% to 46% Mortgage servicing rights 412 Discounted cash flow Discount rate 6% to 11% Prepayment speeds 5% to 79% (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. The fair values presented represent the Company’s best estimate of fair value using the methodologies discussed below. Disclosures about Fair Value of Financial Instruments The fair values presented represent the Company’s best estimate of fair value using the methodologies discussed below. March 31, 2016 Carrying Value Level I Level II Level III Total Fair Value Financial assets: Cash and cash equivalents $ 23,883 $ 23,883 $ — $ — $ 23,883 Certificates of deposit 1,500 — — 1,526 1,526 Investment and mortgage backed securities available for sale 389,603 25 382,506 7,072 389,603 Loans receivable, net 1,235,613 — — 1,255,642 1,255,642 Accrued interest receivable 5,730 5,730 — — 5,730 Regulatory stock 15,492 15,492 — — 15,492 Mortgage servicing rights 512 — — 512 512 Bank owned life insurance 31,119 31,119 — — 31,119 Financial liabilities: Deposits $ 1,210,106 $ 604,347 $ — $ 610,374 $ 1,214,721 Short-term borrowings 126,243 126,243 — — 126,243 Other borrowings 230,601 — — 232,085 232,085 Advances by borrowers for taxes and insurance 8,514 8,514 — — 8,514 Accrued interest payable 1,076 1,076 — — 1,076 September 30, 2015 Carrying Value Level I Level II Level III Total Fair Value Financial assets: Cash and cash equivalents $ 18,758 $ 18,758 $ — $ — $ 18,758 Certificates of deposit 1,750 — — 1,774 1,774 Investment and mortgage backed securities available for sale 379,407 25 375,171 4,211 379,407 Loans receivable, net 1,102,118 — — 1,123,436 1,123,436 Accrued interest receivable 5,068 5,068 — — 5,068 Regulatory stock 13,831 13,831 — — 13,831 Mortgage servicing rights 412 — — 412 412 Bank owned life insurance 30,655 30,655 — — 30,655 Financial liabilities: Deposits $ 1,096,754 $ 500,427 $ — $ 600,250 1,100,677 Short-term borrowings 91,339 91,339 — — 91,339 Other borrowings 229,101 — — 230,255 230,255 Advances by borrowers for taxes and insurance 4,273 4,273 — — 4,273 Accrued interest payable 866 866 — — 866 Financial instruments are defined as cash, evidence of an ownership interest in an entity, or a contract which creates an obligation or right to receive or deliver cash or another financial instrument from/to a second entity on potentially favorable or unfavorable terms. Fair value is defined as the amount at which a financial instrument could be exchanged in a current transaction between willing parties other than in a forced or liquidation sale. If a quoted market price is available for a financial instrument, the fair value would be calculated based upon the market price per trading unit of the instrument. If no readily available market exists, the fair value for financial instruments should be based upon management’s judgment regarding current economic conditions, interest rate risk, expected cash flows, future estimated losses, and other factors as determined through various option pricing formulas or simulation modeling. As many of these assumptions result from judgments made by management based upon estimates which are inherently uncertain, the resulting values may not be indicative of the amount realizable in the sale of a particular financial instrument. In addition, changes in the assumptions on which the values are based may have a significant impact on the resulting estimated values. As certain assets and liabilities, such as deferred tax assets, premises and equipment, and many other operational elements of the Bank, are not considered financial instruments but have value, this fair value of financial instruments would not represent the full market value of the Company. The Company employed simulation modeling in determining the fair value of financial instruments for which quoted market prices were not available based upon the following assumptions: Cash and Cash Equivalents, Accrued Interest Receivable, Short-Term Borrowings, Advances by Borrowers for Taxes and Insurance, and Accrued Interest Payable The fair value approximates the current book value. Bank-Owned Life Insurance The fair value is equal to the cash surrender value of the Bank-owned life insurance. Investment and Mortgage-Backed Securities Available for Sale and Regulatory Stock The fair value of investment and mortgage-backed securities available for sale is equal to the available quoted market price. If no quoted market price is available, fair value is estimated using the quoted market price for similar securities. Since the Regulatory stock is not actively traded on a secondary market and held exclusively by member financial institutions, the fair market value approximates the carrying amount. For certain securities which are not traded in active markets or are subject to transfer restrictions, valuations are adjusted to reflect illiquidity and/or non-transferability, and such adjustments are generally based on available market evidence (Level 3). In the absence of such evidence, management’s best estimate is used. Management’s best estimate consists of both internal and external support on certain Level 3 investments. Internal cash flow models using a present value formula that includes assumptions market participants would use along with indicative exit pricing obtained from broker/dealers (where available) are used to support fair values of certain Level 3 investments, if applicable. Loans Receivable The fair values of loans are estimated using discounted cash flow analyses, using market rates at the balance sheet date that reflect the credit and interest rate-risk inherent in the loans. Projected future cash flows are calculated based upon contractual maturity or call dates, projected repayments and prepayments of principal. Generally, for variable rate loans that reprice frequently and with no significant change in credit risk, fair values are based on carrying values. Mortgage Servicing Rights The Company utilizes a third party provider to estimate the fair value of certain loan servicing rights. Fair value for the purpose of this measurement is defined as the amount at which the asset could be exchanged in a current transaction between willing parties, other than in a forced liquidation. Deposits The fair values disclosed for demand, savings, and money market deposit accounts are valued at the amount payable on demand as of quarter-end. Fair values for time deposits are estimated using a discounted cash flow calculation that applies contractual costs currently being offered in the existing portfolio to current market rates being offered for deposits of similar remaining maturities. Other Borrowings Fair values for other borrowings are estimated using a discounted cash flow calculation that applies contractual costs currently being offered in the existing portfolio to current market rates being offered for other borrowings of similar remaining maturities. Commitments to Extend Credit These financial instruments are generally not subject to sale, and fair values are not readily available. The carrying value, represented by the net deferred fee arising from the unrecognized commitment, and the fair value, determined by discounting the remaining contractual fee over the term of the commitment using fees currently charged to enter into similar agreements with similar credit risk, are not considered material for disclosure.

Accumulated Other Comprehensive

Accumulated Other Comprehensive Loss	6 Months Ended
Accumulated Other Comprehensive Loss	Mar. 31, 2016
Equity [Abstract]
Accumulated Other Comprehensive Loss	12. Accumulated Other Comprehensive Loss The activity in accumulated other comprehensive loss for the three and six months ended March 31, 2016 and 2015 is as follows (in thousands): Accumulated Other Comprehensive Income/(Loss) Defined Benefit Pension Plan Unrealized Gains Available for Sale Total Balance at December 31, 2015 $ (5,246 ) $ 684 $ (4,562 ) Other comprehensive income before reclassifications — 3,287 3,287 Amounts reclassified from accumulated other comprehensive loss, net of tax 79 (241 ) (162 ) Period change 79 3,046 3,125 Balance at March 31, 2016 $ (5,167 ) $ 3,730 $ (1,437 ) Balance at December 31, 2014 $ (3,188 ) $ 2,457 $ (731 ) Other comprehensive income before reclassifications — 1,567 1,567 Amounts reclassified from accumulated other comprehensive loss, net of tax 40 (135 ) (95 ) Period change 40 1,432 1,472 Balance at March 31, 2015 $ (3,148 ) $ 3,889 $ 741 Accumulated Other Comprehensive Income/(Loss) Defined Benefit Pension Plan Unrealized Gains (Losses) on Securities Available for Sale Total Balance at September 30, 2015 $ (5,325 ) $ 2,930 $ (2,395 ) Other comprehensive loss before reclassifications — 1,043 1,043 Amounts reclassified from accumulated other comprehensive loss, net of tax 158 (243 ) (85 ) Period change 158 800 958 Balance at March 31, 2016 $ (5,167 ) $ 3,730 $ (1,437 ) Balance at September 30, 2014 $ (3,228 ) $ 649 $ (2,579 ) Other comprehensive income before reclassifications — 3,375 3,375 Amounts reclassified from accumulated other comprehensive loss, net of tax 80 (135 ) (55 ) Period change 80 3,240 3,320 Balance at March 31, 2015 $ (3,148 ) $ 3,889 $ 741 Amount Reclassified from Accumulated Other Comprehensive Income Accumulated Other Comprehensive Income for the Three months Ended March 31, Affected Line Item in the Consolidated Statement of Income 2016 2015 Securities available for sale: Securities gains reclassified into earnings $ 365 $ 204 Gain on sale of investments Related income tax expense (124 ) (69 ) Income taxes Net effect on accumulated other comprehensive loss for the period 241 135 Defined benefit pension plan: Amortization of net loss (119 ) (60 ) Compensation and employee benefits Related income tax expense 40 20 Income taxes Net effect on accumulated other comprehensive loss for the period $ (79 ) $ (40 ) Total reclassification for the period $ 162 $ 95 Amount Reclassified from Accumulated Other Comprehensive Income Accumulated Other Comprehensive Income for the Six months Ended March 31, Affected Line Item in the Consolidated Statement of Income 2016 2015 Securities available for sale: Securities gains reclassified into earnings $ 368 $ 204 Gain on sale of investments Related income tax expense (125 ) (69 ) Income taxes Net effect on accumulated other comprehensive loss for the period 243 135 Defined benefit pension plan: Amortization of net loss (239 ) (121 ) Compensation and employee benefits Related income tax expense 81 41 Income taxes Net effect on accumulated other comprehensive loss for the period $ (158 ) $ (80 ) Total reclassification for the period $ 85 $ 55

Acquisitions

Acquisitions	6 Months Ended
Acquisitions	Mar. 31, 2016
Business Combinations [Abstract]
Acquisitions	13. Acquisitions Acquisition of Eagle National Bancorp, Inc. On December 4, 2015, the Company closed on a merger transaction pursuant to which ESSA Bancorp, Inc. acquired Eagle National Bancorp, Inc. (“ENB”) and its’ wholly owned subsidiary Eagle National Bank, in a cash transaction. The acquisition added five branch locations in the Philadelphia, Pennsylvania market, establishing ESSA’s presence in that market. Under the terms of the merger agreement, the Company acquired all of the outstanding shares of ENB, for a total cash purchase price of approximately $24.7 million. Eagle National Bank has been merged into ESSA Bank & Trust, with ESSA Bank & Trust as the surviving entity. The acquired assets and assumed liabilities were measured at estimated fair values. Management made significant estimates and exercised significant judgment in accounting for the acquisition. Management measured loan fair values based on loan file reviews (including borrower financial statements or tax returns), appraised collateral values, expected cash flows and historical loss factors of ENB. The Company also recorded an identifiable intangible asset representing the core deposit base of ENB based on management’s evaluation of the cost of such deposits relative to alternative funding sources. Management used market quotations to measure the fair value of investment securities. The business combination resulted in the acquisition of loans with and without evidence of credit quality deterioration. ENB’s loans were deemed impaired at the acquisition date if the Company did not expect to receive all contractually required cash flows due to concerns about credit quality. Such loans were fair valued and the difference between contractually required payments at the acquisition date and cash flows expected to be collected was recorded as a nonaccretable difference. At the acquisition date, the Company recorded $3.5 million of purchased credit-impaired loans subject to a nonaccretable difference of $2.0 million. The method of measuring carrying value of purchased loans differs from loans originated by the Company (originated loans), and as such, the Company identifies purchased loans and purchased loans with a credit quality discount and originated loans as amortized cost. ENB’s loans without evidence of credit deterioration were measured to fair valued by discounting both expected principal and interest cash flows using an observable discount rate for similar instruments that a market participant would consider in determining fair value. Additionally, consideration was given to management’s best estimates of default rates and payment speeds. At acquisition, ENB’s loan portfolio without evidence of deterioration totaled $120.7 million and was recorded at a fair value of $121.4 million. The following condensed statement reflects the values assigned to ENB net assets as of the acquisitions date: Total purchase price $ 24,655 Net assets acquired: Cash $ 8,481 Investments available for sale 36,275 Loans receivable 123,380 Regulatory stock 889 Premises and equipment, net 945 Intangible assets 1,491 Deferred tax assets 715 Other assets 2,174 Certificates of deposits (32,408 ) Deposits other than certificates of deposits (119,865 ) Other liabilities (964 ) 21,113 Goodwill resulting from the ENB merger 3,542 Results of operations for ENB prior to the acquisition date are not included in the Consolidated Statement of Income for the three and six month periods ended March 31, 2016. The following table presents financial information regarding the former Eagle National Bank operations included in the Consolidated Statement of Income from the date of acquisition through March 31, 2016 under column “Actual from acquisition date through March 31, 2016.” In addition, the following table presents unaudited pro forma information as if the acquisition of ENB had occurred on October 1, 2014 under the “Pro Forma” columns. The table below has been prepared for comparative purposes only and is not necessarily indicative of the actual results that would have been attained had the acquisition occurred as of the beginning of the periods presented, nor is it indicative of future results. Furthermore, the unaudited pro forma information does not reflect management’s estimate of any revenue-enhancing opportunities nor anticipated cost savings as a result of the integration and consolidation of the acquisition. Merger and acquisition integration costs and amortization of fair value adjustments net of the related income tax effects are included in the amounts below. Actual From Acquisition Date Through March 31, 2016 (in thousands) Net interest income $ 2,123 Non interest income 166 Net income $ 575 Pro Formas Three months ended March 31, Six months ended March 31, 2016 2015 2016 2015 (in thousands, except per share data) Net interest income $ 12,284 $ 12,653 $ 24,760 $ 25,376 Non interest income 2,278 2,037 4,177 3,999 Net income 2,128 2,469 2,436 4,961 Pro forma earnings per share: Basic $ 0.21 $ 0.24 $ 0.24 $ 0.47 Diluted $ 0.20 $ 0.24 $ 0.23 $ 0.47

Recent Accounting Pronounceme22

Recent Accounting Pronouncements (Policies)	6 Months Ended
Recent Accounting Pronouncements (Policies)	Mar. 31, 2016
Accounting Changes and Error Corrections [Abstract]
Revenue from Contracts with Customers	In May 2014, the FASB issued ASU 2014-09, Revenue from Contracts with Customers In August 2015, the FASB issued ASU 2015-14, Revenue from Contract with Customers Topic 606 In March 2016, the FASB issued ASU 2016-08, Revenue from Contracts with Customers (Topic 606). Revenue from Contracts with Customers (Topic 606), Revenue from Contracts with Customers (Topic 606): Deferral of the Effective Date, In April 2016, the FASB issued ASU 2016-10, Revenue from Contracts with Customers (Topic 606). Revenue from Contracts with Customers (Topic 606) Revenue from Contracts with Customers (Topic 606)
Compensation Stock Compensation	In June 2014, the FASB issued ASU 2014-12, Compensation – Stock Compensation ( Topic 718 ): Accounting for Share-Based Payments when the Terms of an Award Provide that a Performance Target Could Be Achieved After the Requisite Service Period In March 2016, the FASB issued ASU 2016-09, Compensation – Stock Compensation (Topic 718) Share-Based Payment
Presentation of Financial Statements Going Concern	In August 2014, the FASB issued ASU 2014-15, Presentation of Financial Statements – Going Concern (Subtopic
Derivatives and Hedging	In November 2014, the FASB issued ASU 2014-16, Derivatives and Hedging (Topic 815): Determining Whether the Host Contract in a Hybrid Financial Instrument Issued in the Form of a Share Is More Akin to Debt or to Equity (a consensus of the FASB Emerging Issues Task Force). In March 2016, the FASB issued ASU 2016-05, Derivatives and Hedging (Topic 815) . In March 2016, the FASB issued ASU 2016-06, Derivatives and Hedging (Topic 815)
Income Statement Extraordinary and Unusual Items	In January 2015, the FASB issued ASU 2015-01, Income Statement – Extraordinary and Unusual Items,
Consolidation	In February 2015, the FASB issued ASU 2015-02, Consolidation (Topic 810)
Interest Imputation of Interest	In April 2015, the FASB issued ASU 2015-03, Interest – Imputation of Interest (Subtopic 835-30)
Compensation Retirement Benefits	In April 2015, the FASB issued ASU 2015-04, Compensation – Retirement Benefits (Topic 715),
Business Combinations	In September 2015, the FASB issued ASU 2015-16, Business Combinations (Topic 805).
Income Taxes	In November 2015, the FASB issued ASU 2015-17, Income Taxes (Topic 740): Balance Sheet Classification of Deferred Taxes
Financial Instruments	In January 2016, the FASB issued ASU 2016-01, Financial Instruments – Overall (Subtopic 825-10): Recognition and Measurement of Financial Assets and Financial Liabilities
Leases	In February 2016, the FASB issued ASU 2016-02, Leases (Topic 842)
Liabilities Extinguishments of Liabilities	In March 2016, the FASB issued ASU 2016-04, Liabilities – Extinguishments of Liabilities (Subtopic 405-20).
Investments	In March 2016, the FASB issued ASU 2016-07, Investments – Equity Method and Joint Ventures (Topic 323)

Earnings per Share (Tables)

Earnings per Share (Tables)	6 Months Ended
Earnings per Share (Tables)	Mar. 31, 2016
Earnings Per Share [Abstract]
Composition of the Weighted-Average Common Shares (Denominator) Used in the Basic and Diluted Earnings Per Share Computation	The following table sets forth the composition of the weighted-average common shares (denominator) used in the basic and diluted earnings per share computation for the three and six month periods ended March 31, 2016 and 2015. Three months ended Six months ended March 31, 2016 March 31, 2015 March 31, 2016 March 31, 2015 Weighted-average common shares outstanding 18,133,095 18,133,095 18,133,095 18,133,095 Average treasury stock shares (6,793,799 ) (6,695,606 ) (6,793,553 ) (6,652,080 ) Average unearned ESOP shares (933,558 ) (978,835 ) (939,247 ) (984,555 ) Average unearned non-vested shares (20,584 ) (16,344 ) (24,681 ) (16,590 ) Weighted average common shares and common stock equivalents used to calculate basic earnings per share 10,385,154 10,442,310 10,375,614 10,479,870 Additional common stock equivalents (non-vested stock) used to calculate diluted earnings per share 444 386 — — Additional common stock equivalents (stock options) used to calculate diluted earnings per share 139,100 78,451 140,155 42,727 Weighted average common shares and common stock equivalents used to calculate diluted earnings per share 10,524,697 10,521,147 10,515,770 10,522,597

Investment Securities (Tables)

Investment Securities (Tables)	6 Months Ended
Investment Securities (Tables)	Mar. 31, 2016
Investments, Debt and Equity Securities [Abstract]
Summary of Amortized Cost 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, 2016 Amortized Cost Gross Gains Gross Unrealized Losses Fair Value Available for Sale Fannie Mae $ 134,469 $ 1,965 $ (280 ) $ 136,154 Freddie Mac 87,858 1,224 (155 ) 88,927 Governmental National Mortgage Association 14,160 88 (49 ) 14,199 Other mortgage-backed securities 2,409 — (20 ) 2,389 Total mortgage-backed securities 238,896 3,277 (504 ) 241,669 Obligations of states and political subdivisions 55,272 2,324 (22 ) 57,574 U.S. government agency securities 32,968 363 (25 ) 33,306 Corporate obligations 34,852 411 (367 ) 34,896 Trust-preferred securities 1,628 — (18 ) 1,610 Other debt securities 20,310 286 (73 ) 20,523 Total debt securities 383,926 6,661 (1,009 ) 389,578 Equity securities - financial services 25 — — 25 Total $ 383,951 $ 6,661 $ (1,009 ) $ 389,603 September 30, 2015 Amortized Cost Gross Unrealized Gains Gross Unrealized Losses Fair Value Available for Sale Fannie Mae $ 130,476 $ 2,052 $ (541 ) $ 131,987 Freddie Mac 88,514 1,063 (286 ) 89,291 Governmental National Mortgage Association 13,201 103 (52 ) 13,252 Other mortgage-backed securities 2,494 — (17 ) 2,477 Total mortgage-backed securities 234,685 3,218 (896 ) 237,007 Obligations of states and political subdivisions 50,094 1,676 (145 ) 51,625 U.S. government agency securities 45,799 399 (12 ) 46,186 Corporate obligations 22,440 157 (237 ) 22,360 Trust-preferred securities 1,613 98 — 1,711 Other debt securities 20,313 216 (36 ) 20,493 Total debt securities 374,944 5,764 (1,326 ) 379,382 Equity securities - financial services 25 — — 25 Total $ 374,969 $ 5,764 $ (1,326 ) $ 379,407
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, 2016, by contractual maturity, are shown below. Expected maturities will differ from contractual maturities because borrowers may have the right to call or prepay obligations with or without call or prepayment penalties (in thousands): Available For Sale Amortized Cost Fair Value Due in one year or less $ 3,253 $ 3,264 Due after one year through five years 51,173 51,920 Due after five years through ten years 80,458 81,861 Due after ten years 249,042 252,533 Total $ 383,926 $ 389,578

Unrealized Losses on Securiti25

Unrealized Losses on Securities (Tables)	6 Months Ended
Unrealized Losses on Securities (Tables)	Mar. 31, 2016
Text Block [Abstract]
Schedule of Gross Unrealized Losses and Fair Value	The following table shows 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, 2016 Number of Securities Less than Twelve Months Twelve Months or Greater Total Fair Value Gross Unrealized Losses Fair Value Gross Unrealized Fair Value Gross Fannie Mae 20 $ 7,962 $ (14 ) $ 19,159 $ (266 ) $ 27,121 $ (280 ) Freddie Mac 11 1,489 (9 ) 12,964 (146 ) 14,453 (155 ) Governmental National Mortgage Association 5 4,392 (46 ) 863 (3 ) 5,255 (49 ) Other mortgage-backed securities 3 — — 2,388 (20 ) 2,388 (20 ) Obligations of states and political subdivisions 6 7,867 (22 ) — — 7,867 (22 ) U.S. government agency securities 2 1,894 (25 ) — — 1,894 (25 ) Corporate obligations 11 10,482 (330 ) 963 (37 ) 11,445 (367 ) Trust-preferred securities 2 1,610 (18 ) — — 1,610 (18 ) Other debt securities 8 5,386 (45 ) 2,542 (28 ) 7,928 (73 ) Total 68 $ 41,082 $ (509 ) $ 38,879 $ (500 ) $ 79,961 $ (1,009 ) September 30, 2015 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 22 $ 7,238 $ (28 ) $ 23,609 $ (513 ) $ 30,847 $ (541 ) Freddie Mac 12 1,487 (1 ) 15,477 (285 ) 16,964 (286 ) Governmental National Mortgage Association 2 — — 2,209 (52 ) 2,209 (52 ) Other mortgage-backed securities 3 — — 2,477 (17 ) 2,477 (17 ) Obligations of states and political subdivisions 14 9,184 (57 ) 4,667 (88 ) 13,851 (145 ) U.S. government agency securities 3 3,246 (12 ) — — 3,246 (12 ) Corporate obligations 10 9,263 (207 ) 970 (30 ) 10,233 (237 ) Other debt securities 6 5,232 (26 ) 1,748 (10 ) 6,980 (36 ) Total 72 $ 35,650 $ (331 ) $ 51,157 $ (995 ) $ 86,807 $ (1,326 )

Loans Receivable, Net and All26

Loans Receivable, Net and Allowance for Loan Losses (Tables)	6 Months Ended
	Mar. 31, 2016
Summary of Loans Receivable	Loans receivable consist of the following (in thousands): March 31, 2016 September 30, 2015 Real estate loans: Residential $ 602,085 $ 610,582 Construction 3,135 878 Commercial 286,684 200,004 Commercial 55,170 34,314 Obligations of states and political subdivisions 59,673 59,820 Home equity loans and lines of credit 46,613 39,903 Auto Loans 188,334 162,193 Other 3,334 3,343 1,245,028 1,111,037 Less allowance for loan losses 9,415 8,919 Net loans $ 1,235,613 $ 1,102,118
Schedule of Investment and Unpaid Principal Balances for Impaired Loans	The following table includes the recorded investment and unpaid principal balances for impaired loans with the associated allowance amount, if applicable (in thousands): Recorded Unpaid Associated March 31, 2016 With no specific allowance recorded: Real estate loans Residential $ 7,344 $ 9,071 $ — Construction — — — Commercial 11,944 13,862 — Commercial 1,939 1,954 — Obligations of states and political subdivisions — — — Home equity loans and lines of credit 583 642 — Auto loans 275 395 — Other 2 25 — Total 22,087 25,949 — With an allowance recorded: Real estate loans Residential 2,664 3,067 343 Construction — — — Commercial 1,735 1,883 170 Commercial — — — Obligations of states and political subdivisions — — — Home equity loans and lines of credit 57 106 56 Auto loans 432 432 191 Other — — — Total 4,888 5,488 760 Total: Real estate loans Residential 10,008 12,138 343 Construction — — — Commercial 13,679 15,745 170 Commercial 1,939 1,954 — Obligations of states and political subdivisions — — — Home equity loans and lines of credit 640 748 56 Auto loans 707 827 191 Other 2 25 — Total Impaired Loans $ 26,975 $ 31,437 $ 760 Recorded Unpaid Associated September 30, 2015 With no specific allowance recorded: Real Estate Loans Residential $ 9,552 $ 11,521 $ — Construction — — — Commercial 15,100 16,316 — Commercial 204 216 — Obligations of states and political subdivisions — — — Home equity loans and lines of credit 731 743 — Auto Loans 350 464 — Other — — — Total 25,937 29,260 — With an allowance recorded: Real Estate Loans Residential 2,433 2,639 373 Construction — — — Commercial — — — Commercial — — — Obligations of states and political subdivisions — — — Home equity loans and lines of credit 64 93 64 Auto Loans 275 275 131 Other — — — Total 2,772 3,007 568 Total: Real Estate Loans Residential 11,985 14,160 373 Construction — — — Commercial 15,100 16,316 — Commercial 204 216 — Obligations of states and political subdivisions — — — Home equity loans and lines of credit 795 836 64 Auto Loans 625 739 131 Other — — — Total Impaired Loans $ 28,709 $ 32,267 $ 568 The following table represents the average recorded investments in the impaired loans and the related amount of interest recognized during the time within the period that the impaired loans were impaired (in thousands): Three months ended March 31, 2016 2015 2016 2015 Average Average Interest Interest With no specific allowance recorded: Real estate loans Residential $ 7,296 $ 10,551 $ 22 $ 64 Construction — — — — Commercial 12,128 15,247 131 190 Commercial 1,919 343 37 2 Obligations of states and political subdivisions — — — — Home equity loans and lines of credit 594 266 — — Auto loans 228 55 — 1 Other — — — — Total 22,165 26,462 190 257 With an allowance recorded: Real estate loans Residential 2,679 2,411 4 19 Construction — — — — Commercial 1,490 313 — — Commercial 6 — — — Obligations of states and political subdivisions — — — — Home equity loans and lines of credit 59 39 — — Auto loans 222 67 2 1 Other 1 — — — Total 4,457 2,830 6 20 Total: Real estate loans Residential 9,975 12,962 26 83 Construction — — — — Commercial 13,618 15,560 131 190 Commercial 1,925 343 37 2 Obligations of states and political subdivisions — — — — Home equity loans and lines of credit 653 305 — — Auto loans 450 122 2 2 Other 1 — — — Total Impaired Loans $ 26,622 $ 29,292 $ 196 $ 277 Six months ended March 31, 2016 2015 2016 2015 Average Average Interest Interest With no specific allowance recorded: Real estate loans Residential $ 8,040 $ 10,740 $ 48 $ 163 Construction — — — — Commercial 12,908 15,446 307 384 Commercial 1,350 334 52 4 Obligations of states and political subdivisions — — — — Home equity loans and lines of credit 672 234 2 2 Auto loans 255 53 2 1 Other — — — — Total 23,225 26,807 411 554 With an allowance recorded: Real estate loans Residential 2,636 2,453 9 43 Construction — — — — Commercial 974 442 — — Commercial 4 — — — Obligations of states and political subdivisions — — — — Home equity loans and lines of credit 66 26 — — Auto loans 181 101 3 3 Other — — — — Total 3,861 3,022 12 46 Total: Real estate loans Residential 10,676 13,193 57 206 Construction — — — — Commercial 13,882 15,888 307 384 Commercial 1,354 334 52 4 Obligations of states and political subdivisions — — — — Home equity loans and lines of credit 738 260 2 2 Auto loans 436 154 5 4 Other — — — — Total Impaired Loans $ 27,086 $ 29,829 $ 423 $ 600
Changes in Accretable Yield for Purchased Credit-Impaired Loans	Changes in the accretable yield for purchased credit-impaired loans were as follows, since acquisition, for the periods ended March 31, 2016 and March 31, 2015: Six months ended March 31, 2016 2015 Balance at beginning of period $ 258 $ 170 Reclassification, new additions and other 240 — Accretion (133 ) (14 ) Balance at end of period $ 365 $ 156
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, 2016 September 30, 2015 Acquired Loans with Specific Acquired Loans with Specific Outstanding balance $ 7,622 $ 4,779 Carrying amount $ 5,995 $ 4,162
Schedule of Loans Evaluated for Impairment	The following table shows the amount of loans in each category that was individually and collectively evaluated for impairment at the dates indicated (in thousands): Total Loans Individually Loans Acquired Collectively March 31, 2016 Real estate loans: Residential $ 602,085 $ 10,008 $ — $ 592,077 Construction 3,135 — — 3,135 Commercial 286,684 13,679 4,958 268,047 Commercial 55,170 1,939 411 52,820 Obligations of states and political subdivisions 59,673 — — 59,673 Home equity loans and lines of credit 46,613 640 626 45,347 Auto loans 188,334 707 — 187,627 Other 3,334 2 — 3,332 Total $ 1,245,028 $ 26,975 $ 5,995 $ 1,212,058 Total Loans Individually Loans Acquired Collectively September 30, 2015 Real estate loans: Residential $ 610,582 $ 11,985 $ — $ 598,597 Construction 878 — — 878 Commercial 200,004 15,100 4,108 180,796 Commercial 34,314 204 54 34,056 Obligations of states and political subdivisions 59,820 — — 59,820 Home equity loans and lines of credit 39,903 795 — 39,108 Auto loans 162,193 625 — 161,568 Other 3,343 — — 3,343 Total $ 1,111,037 $ 28,709 $ 4,162 $ 1,078,166
Classes of the Loan Portfolio, Internal Risk Rating System	The following tables present the classes of the loan portfolio summarized by the aggregate Pass and the criticized categories of Special Mention, Substandard and Doubtful within the internal risk rating system as of March 31, 2016 and September 30, 2015 (in thousands): Pass Special Substandard Doubtful Total March 31, 2016 Commercial real estate loans $ 254,939 $ 10,578 $ 21,167 $ — $ 286,684 Commercial 51,561 330 3,279 — 55,170 Obligations of states and political subdivisions 59,673 — — — 59,673 Total $ 366,173 $ 10,908 $ 24,446 $ — $ 401,527 Pass Special Substandard Doubtful Total September 30, 2015 Commercial real estate loans $ 174,516 $ 4,521 $ 20,967 $ — $ 200,004 Commercial 33,801 — 513 — 34,314 Obligations of states and political subdivisions 59,820 — — — 59,820 Total $ 268,137 $ 4,521 $ 21,480 $ — $ 294,138
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, 2016 and September 30, 2015 (in thousands): Performing Non-performing Total March 31, 2016 Real estate loans: Residential $ 592,400 $ 9,685 $ 602,085 Construction 3,135 — 3,135 Home equity loans and lines of credit 45,322 1,291 46,613 Auto loans 187,738 596 188,334 Other 3,297 37 3,334 Total $ 831,892 $ 11,609 $ 843,501 Performing Non-performing Total September 30, 2015 Real estate loans: Residential $ 600,810 $ 9,772 $ 610,582 Construction 878 — 878 Home equity loans and lines of credit 39,213 690 39,903 Auto loans 161,827 366 162,193 Other 3,322 21 3,343 Total $ 806,050 $ 10,849 $ 816,899
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, 2016 and September 30, 2015 (in thousands): Current 31-60 Days 61-90 Days Greater than Non-Accrual Total Past Total March 31, 2016 Real estate loans Residential $ 590,617 $ 1,321 $ 462 $ — $ 9,685 $ 11,468 $ 602,085 Construction 3,135 — — — — — 3,135 Commercial 275,800 214 157 — 10,513 10,884 286,684 Commercial 54,598 98 — — 474 572 55,170 Obligations of states and political subdivisions 59,673 — — — — — 59,673 Home equity loans and lines of credit 45,109 121 92 — 1,291 1,504 46,613 Auto loans 186,764 852 122 — 596 1,570 188,334 Other 3,255 42 — — 37 79 3,334 Total $ 1,218,951 $ 2,648 $ 833 $ — $ 22,596 $ 26,077 $ 1,245,028 Current 31-60 Days Past Due 61-90 Days Past Due Greater than Non-Accrual Total Past Total September 30, 2015 Real estate loans Residential $ 598,190 $ 1,575 $ 1,045 $ — $ 9,772 $ 12,392 $ 610,582 Construction 878 — — — — — 878 Commercial 190,440 137 587 — 8,840 9,564 200,004 Commercial 33,545 346 7 — 416 769 34,314 Obligations of states and political subdivisions 59,820 — — — — — 59,820 Home equity loans and lines of credit 39,136 32 45 — 690 767 39,903 Auto loans 160,272 1,375 180 — 366 1,921 162,193 Other 3,295 27 — — 21 48 3,343 Total $ 1,085,576 $ 3,492 $ 1,864 $ — $ 20,105 $ 25,461 $ 1,111,037
Summary of Primary Segments of ALL	The following tables summarize changes in the primary segments of the ALL for the three and six month periods ending March 31, 2016 and 2015 (in thousands): Real Estate Loans Residential Construction Commercial Commercial Obligations of Home Auto Loans Other Unallocated Total ALL balance at December 31, 2015 $ 4,747 $ 14 $ 858 $ 705 $ 187 $ 389 $ 1,754 $ 27 $ 576 $ 9,257 Charge-offs (308 ) — (9 ) — — (29 ) (234 ) — — (580 ) Recoveries — — 52 — — 3 80 3 — 138 Provision 216 10 67 33 9 26 325 (5 ) (81 ) 600 ALL balance at March 31, 2016 $ 4,655 $ 24 $ 968 $ 738 $ 196 $ 389 $ 1,925 $ 25 $ 495 $ 9,415 ALL balance at December 31, 2014 $ 5,571 $ 13 $ 676 $ 515 $ 145 $ 545 $ 674 $ 26 $ 351 $ 8,516 Charge-offs (251 ) — (42 ) — — — (125 ) — — (418 ) Recoveries 4 — 20 9 — 4 8 — — 45 Provision (35 ) 4 189 111 (58 ) (81 ) 466 4 (75 ) 525 ALL balance at March 31, 2015 $ 5,289 $ 17 $ 843 $ 635 $ 87 $ 468 $ 1,023 $ 30 $ 276 $ 8,668 Real Estate Loans Residential Construction Commercial Commercial Obligations of Home Auto Loans Other Unallocated Total ALL balance at September 30, 2015 $ 5,140 $ 7 $ 671 $ 693 $ 189 $ 461 $ 1,570 $ 27 $ 161 $ 8,919 Charge-offs (399 ) — (9 ) (3 ) — (54 ) (422 ) — — (887 ) Recoveries 3 — 52 1 — 4 117 6 — 183 Provision (89 ) 17 254 47 7 (22 ) 660 (8 ) 334 1,200 ALL balance at March 31, 2016 $ 4,655 $ 24 $ 968 $ 738 $ 196 $ 389 $ 1,925 $ 25 $ 495 $ 9,415 ALL balance at September 30, 2014 $ 5,573 $ 11 $ 663 $ 528 $ 163 $ 470 $ 459 $ 32 $ 735 $ 8,634 Charge-offs (760 ) — (53 ) (27 ) — (19 ) (165 ) — — (1,024 ) Recoveries 22 — 31 9 — 12 9 — — 83 Provision 454 6 202 125 (76 ) 5 720 (2 ) (459 ) 975 ALL balance at March 31, 2015 $ 5,289 $ 17 $ 843 $ 635 $ 87 $ 468 $ 1,023 $ 30 $ 276 $ 8,668 Acquired loans are recorded at fair value on their purchase date without a carryover of the related allowance for loan losses. The following table summarizes the primary segments of the ALL, segregated into amount required for loans individually evaluated for impairment and the amount required for loans collectively evaluated for impairment as of March 31, 2016 and September 30, 2015 (in thousands): Real Estate Loans Residential Construction Commercial Commercial Obligations of Home Auto Loans Other Unallocated Total Individually evaluated for impairment $ 343 $ — $ 170 $ 0 $ — $ 56 $ 191 $ — $ — $ 760 Collectively evaluated for impairment 4,312 24 798 738 196 333 1,734 25 495 8,655 ALL Balance at March 31, 2016 $ 4,655 $ 24 $ 968 $ 738 $ 196 $ 389 $ 1,925 $ 25 $ 495 $ 9,415 Individually evaluated for impairment $ 373 $ — $ — $ — $ — $ 64 $ 131 $ — $ — $ 568 Collectively evaluated for impairment 4,767 7 671 693 189 397 1,439 27 161 8,351 ALL balance at September 30, 2015 $ 5,140 $ 7 $ 671 $ 693 $ 189 $ 461 $ 1,570 $ 27 $ 161 $ 8,919
Summary of Troubled Debt Restructuring Granted	The following is a summary of troubled debt restructuring granted during the three and six months ended March 31, 2016 and 2015 (dollars in thousands). For the Three Months Ended March 31, 2016 Dollars in thousands Number of Pre-Modification Post-Modification Troubled Debt Restructurings Real estate loans: Residential 3 $ 587 $ 587 Construction — — — Commercial 1 77 77 Commercial — — — Obligations of states and political subdivisions — — — Home equity loans and lines of credit — — — Auto loans — — — Other — — — Total 4 $ 664 $ 664 For the Three Months Ended March 31, 2015 Dollars in thousands Number of Pre-Modification Post-Modification Recorded Troubled Debt Restructurings Real estate loans: Residential 2 $ 408 $ 408 Construction — — — Commercial — — — Commercial — — — Obligations of states and political subdivisions — — — Home equity loans and lines of credit 1 150 150 Auto loans — — — Other — — — Total 3 $ 558 $ 558 For the Six Months Ended March 31, 2016 Dollars in thousands Number of Pre-Modification Post-Modification Troubled Debt Restructurings Real estate loans: Residential 4 $ 668 $ 668 Construction — — — Commercial — — — Commercial — — — Obligations of states and political subdivisions — — — Home equity loans and lines of credit 1 77 77 Auto loans — — — Other — — — Total 5 $ 745 $ 745 For the Six Months Ended March 31, 2016 Dollars in thousands Number of Pre-Modification Post-Modification Troubled Debt Restructurings Real estate loans: Residential 9 $ 1,474 $ 1,474 Construction — — — Commercial — — — Commercial — — — Obligations of states and political subdivisions — — — Home equity loans and lines of credit 1 150 150 Auto loans — — — Other — — — Total 10 $ 1,624 $ 1,624
Eagle National Bancorp, Inc [Member]
Summary of Loans Receivable	Included in the March 31, 2016 balances are loans acquired from Eagle National Bank, as of the acquisition date of December 4, 2015 as follows: 2015 Real estate loans: Residential $ 10,743 Commercial 87,336 Commercial 16,604 Home equity loans and lines of credit 8,632 Other 65 Total loans $ 123,380
Schedule of Investment and Unpaid Principal Balances for Impaired Loans	The carrying value of the loans acquired and accounted for in accordance with ASC 310-30, Loans and Debt Securities Acquired with Deteriorated Credit Quality Unpaid principal balance $ 3,468 Interest 717 Contractual cash flows 4,185 Non-accretable discount (1,973 ) Expected cash flows 2,212 Accretable discount (240 ) Estimated fair value $ 1,972

Deposits (Tables)

Deposits (Tables)	6 Months Ended
Deposits (Tables)	Mar. 31, 2016
Banking and Thrift [Abstract]
Schedule of Deposits by Major Classifications	Deposits consist of the following major classifications (in thousands): March 31, 2016 September 30, 2015 Non-interest bearing demand accounts $ 150,593 $ 98,514 Interest bearing demand accounts 107,563 110,268 Money market accounts 202,786 162,418 Savings and club accounts 143,406 129,227 Certificates of deposit 605,758 596,327 Total $ 1,210,106 $ 1,096,754

Net Periodic Benefit Cost-Def28

Net Periodic Benefit Cost-Defined Benefit Plan (Tables)	6 Months Ended
Net Periodic Benefit Cost-Defined Benefit Plan (Tables)	Mar. 31, 2016
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 periods ended (in thousands): Three Months Ended Six Months Ended 2016 2015 2016 2015 Service Cost $ 249 $ 218 $ 498 $ 436 Interest Cost 245 206 490 412 Expected return on plan assets (311 ) (308 ) (622 ) (616 ) Amortization of unrecognized loss 119 60 239 120 Net periodic benefit cost $ 302 $ 176 $ 605 $ 352

Equity Incentive Plan (Tables)

Equity Incentive Plan (Tables)	6 Months Ended
Equity Incentive Plan (Tables)	Mar. 31, 2016
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]
Schedule of Stock Option Activity	The following is a summary of the Company’s stock option activity and related information for its option grants for the three month period ended March 31, 2016. Number of Stock Options Weighted- average Exercise Price Weighted- average Remaining Contractual Term (in years) Aggregate Intrinsic Value (in thousands) Outstanding, September 30, 2015 1,314,580 $ 12.35 2.67 $ 802,000 Granted — — — — Exercised (140,254 ) 12.35 2.17 — Forfeited — — — — Outstanding, March 31, 2016 1,174,326 $ 12.35 2.17 $ 1,339,000 Exercisable at March 31, 2016 1,174,326 $ 12.35 2.17 $ 1,339,000
Schedule of Restricted Stock Option Activity	The following is a summary of the status of the Company’s restricted stock as of March 31, 2016, and changes therein during the three month period then ended: Number of Restricted Stock Weighted- Grant Date Nonvested at September 30, 2015 26,311 $ 12.30 Granted 23,491 13.52 Vested — — Forfeited — — Nonvested at March 31, 2016 49,802 $ 12.88

Fair Value Measurement (Tables)

Fair Value Measurement (Tables)	6 Months Ended
Fair Value Measurement (Tables)	Mar. 31, 2016
Fair Value Disclosures [Abstract]
Schedule of Securities, Other Real Estate Owned and Impaired Loans Measured at Fair Value	The following table presents information about the Company’s securities, other real estate owned and impaired loans measured at fair value as of March 31, 2016 and September 30, 2015 and indicates the fair value hierarchy of the valuation techniques utilized by the Bank to determine such fair value: Fair Value Measurement at March 31, 2016 Fair Value Measurements Utilized for the Company’s Financial Assets (in thousands): Quoted Prices in Active Significant Other Significant Balances as of Securities available-for-sale measured on a recurring basis Mortgage backed securities $ — $ 241,669 $ — $ 241,669 Obligations of states and political subdivisions — 57,574 — 57,574 U.S. government agencies — 33,306 — 33,306 Corporate obligations — 29,934 4,962 34,896 Trust-preferred securities — — 1,610 1,610 Other debt securities — 20,023 500 20,523 Equity securities-financial services 25 — — 25 Total debt and equity securities $ 25 $ 382,506 $ 7,072 $ 389,603 Assets measured at fair value on a nonrecurring basis: Foreclosed real estate owned measured on a non-recurring basis $ — $ — $ 2,316 $ 2,316 Impaired loans measured on a non-recurring basis $ — $ — $ 26,215 $ 26,215 Mortgage servicing rights $ — $ — $ 512 $ 512 Fair Value Measurement at September 30, 2015 Fair Value Measurements Utilized for the Company’s Financial Assets (in thousands): Quoted Prices in Active Significant Other Significant Balances as of Securities available-for-sale measured on a recurring basis Mortgage backed securities $ — $ 237,007 $ — $ 237,007 Obligations of states and political subdivisions — 51,625 — 51,625 U.S. government agencies — 46,186 — 46,186 Corporate obligations — 20,360 2,000 22,360 Trust-preferred securities — — 1,711 1,711 Other debt securities — 19,993 500 20,493 Equity securities-financial services 25 — — 25 Total debt and equity securities $ 25 $ 375,171 $ 4,211 $ 379,407 Assets measured at fair value on a nonrecurring basis: Foreclosed real estate owned measured on a non-recurring basis $ — $ — $ 2,480 $ 2,480 Impaired loans measured on a non-recurring basis $ — $ — $ 28,141 $ 28,141 Mortgage Servicing rights $ — $ — $ 412 $ 412
Schedule of Changes in Fair Value of Level III Investments	The following table presents a summary of changes in the fair value of the Company’s Level III investments for the three and six month periods ended March 31, 2016 and 2015 (in thousands). Fair Value Measurement Using Significant Unobservable Inputs Three months ended March 31, 2016 March 31, 2015 Beginning balance $ 7,136 $ 2,200 Purchases, sales, issuances, settlements, net — 2,000 Total unrealized gain: Included in earnings — — Included in other comprehensive income (64 ) 40 Transfers in and/or out of Level III — — $ 7,072 $ 4,240 Fair Value Measurement Using Significant Unobservable Inputs Six months ended March 31, 2016 March 31, 2015 Beginning balance $ 4,211 $ 2,230 Purchases, sales, issuances, settlements, net 3,000 2,000 Total unrealized gain: Included in earnings — — Included in other comprehensive income (139 ) 10 Transfers in and/or out of Level III — — $ 7,072 $ 4,240
Summary of Additional Quantitative Information about Assets Measured at Fair Value on a Nonrecurring Basis	The following table presents additional quantitative information about assets measured at fair value on a nonrecurring basis and for which the Company has utilized Level 3 inputs to determine fair value: Quantitative Information about Level 3 Fair Value Measurements (in thousands) Fair Value Estimate Valuation Techniques Unobservable Input Range March 31, 2016 Impaired loans $ 26,215 Appraisal of Appraisal 0% to 50% Foreclosed real estate owned 2,316 Appraisal of Appraisal 20% to 49% Mortgage servicing rights 512 Discounted cash flow Discount rate 6% to 11% Prepayment speeds 7% to 81% Quantitative Information about Level 3 Fair Value Measurements (in thousands) Fair Value Estimate Valuation Techniques Unobservable Input Range September 30, 2015 Impaired loans $ 28,141 Appraisal of Appraisal 0% to 60% Foreclosed real estate owned 2,480 Appraisal of Appraisal 20% to 46% Mortgage servicing rights 412 Discounted cash flow Discount rate 6% to 11% Prepayment speeds 5% to 79% (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 Estimate of Fair Value Using Methodologies	The fair values presented represent the Company’s best estimate of fair value using the methodologies discussed below. March 31, 2016 Carrying Value Level I Level II Level III Total Fair Value Financial assets: Cash and cash equivalents $ 23,883 $ 23,883 $ — $ — $ 23,883 Certificates of deposit 1,500 — — 1,526 1,526 Investment and mortgage backed securities available for sale 389,603 25 382,506 7,072 389,603 Loans receivable, net 1,235,613 — — 1,255,642 1,255,642 Accrued interest receivable 5,730 5,730 — — 5,730 Regulatory stock 15,492 15,492 — — 15,492 Mortgage servicing rights 512 — — 512 512 Bank owned life insurance 31,119 31,119 — — 31,119 Financial liabilities: Deposits $ 1,210,106 $ 604,347 $ — $ 610,374 $ 1,214,721 Short-term borrowings 126,243 126,243 — — 126,243 Other borrowings 230,601 — — 232,085 232,085 Advances by borrowers for taxes and insurance 8,514 8,514 — — 8,514 Accrued interest payable 1,076 1,076 — — 1,076 September 30, 2015 Carrying Value Level I Level II Level III Total Fair Value Financial assets: Cash and cash equivalents $ 18,758 $ 18,758 $ — $ — $ 18,758 Certificates of deposit 1,750 — — 1,774 1,774 Investment and mortgage backed securities available for sale 379,407 25 375,171 4,211 379,407 Loans receivable, net 1,102,118 — — 1,123,436 1,123,436 Accrued interest receivable 5,068 5,068 — — 5,068 Regulatory stock 13,831 13,831 — — 13,831 Mortgage servicing rights 412 — — 412 412 Bank owned life insurance 30,655 30,655 — — 30,655 Financial liabilities: Deposits $ 1,096,754 $ 500,427 $ — $ 600,250 1,100,677 Short-term borrowings 91,339 91,339 — — 91,339 Other borrowings 229,101 — — 230,255 230,255 Advances by borrowers for taxes and insurance 4,273 4,273 — — 4,273 Accrued interest payable 866 866 — — 866

Accumulated Other Comprehensi31

Accumulated Other Comprehensive Loss (Tables)	6 Months Ended
Accumulated Other Comprehensive Loss (Tables)	Mar. 31, 2016
Reclassification Out of Accumulated Other Comprehensive Income (Loss) [Member]
Activity in Accumulated Other Comprehensive Loss	The activity in accumulated other comprehensive loss for the three and six months ended March 31, 2016 and 2015 is as follows (in thousands): Accumulated Other Comprehensive Income/(Loss) Defined Benefit Pension Plan Unrealized Gains Available for Sale Total Balance at December 31, 2015 $ (5,246 ) $ 684 $ (4,562 ) Other comprehensive income before reclassifications — 3,287 3,287 Amounts reclassified from accumulated other comprehensive loss, net of tax 79 (241 ) (162 ) Period change 79 3,046 3,125 Balance at March 31, 2016 $ (5,167 ) $ 3,730 $ (1,437 ) Balance at December 31, 2014 $ (3,188 ) $ 2,457 $ (731 ) Other comprehensive income before reclassifications — 1,567 1,567 Amounts reclassified from accumulated other comprehensive loss, net of tax 40 (135 ) (95 ) Period change 40 1,432 1,472 Balance at March 31, 2015 $ (3,148 ) $ 3,889 $ 741 Accumulated Other Comprehensive Income/(Loss) Defined Benefit Pension Plan Unrealized Gains (Losses) on Securities Available for Sale Total Balance at September 30, 2015 $ (5,325 ) $ 2,930 $ (2,395 ) Other comprehensive loss before reclassifications — 1,043 1,043 Amounts reclassified from accumulated other comprehensive loss, net of tax 158 (243 ) (85 ) Period change 158 800 958 Balance at March 31, 2016 $ (5,167 ) $ 3,730 $ (1,437 ) Balance at September 30, 2014 $ (3,228 ) $ 649 $ (2,579 ) Other comprehensive income before reclassifications — 3,375 3,375 Amounts reclassified from accumulated other comprehensive loss, net of tax 80 (135 ) (55 ) Period change 80 3,240 3,320 Balance at March 31, 2015 $ (3,148 ) $ 3,889 $ 741 Amount Reclassified from Accumulated Other Comprehensive Income Accumulated Other Comprehensive Income for the Three months Ended March 31, Affected Line Item in the Consolidated Statement of Income 2016 2015 Securities available for sale: Securities gains reclassified into earnings $ 365 $ 204 Gain on sale of investments Related income tax expense (124 ) (69 ) Income taxes Net effect on accumulated other comprehensive loss for the period 241 135 Defined benefit pension plan: Amortization of net loss (119 ) (60 ) Compensation and employee benefits Related income tax expense 40 20 Income taxes Net effect on accumulated other comprehensive loss for the period $ (79 ) $ (40 ) Total reclassification for the period $ 162 $ 95 Amount Reclassified from Accumulated Other Comprehensive Income Accumulated Other Comprehensive Income for the Six months Ended March 31, Affected Line Item in the Consolidated Statement of Income 2016 2015 Securities available for sale: Securities gains reclassified into earnings $ 368 $ 204 Gain on sale of investments Related income tax expense (125 ) (69 ) Income taxes Net effect on accumulated other comprehensive loss for the period 243 135 Defined benefit pension plan: Amortization of net loss (239 ) (121 ) Compensation and employee benefits Related income tax expense 81 41 Income taxes Net effect on accumulated other comprehensive loss for the period $ (158 ) $ (80 ) Total reclassification for the period $ 85 $ 55

Acquisitions (Tables)

Acquisitions (Tables)	6 Months Ended
Acquisitions (Tables)	Mar. 31, 2016
Pro Forma Selected Information	Actual From Acquisition Date Through March 31, 2016 (in thousands) Net interest income $ 2,123 Non interest income 166 Net income $ 575 Pro Formas Three months ended March 31, Six months ended March 31, 2016 2015 2016 2015 (in thousands, except per share data) Net interest income $ 12,284 $ 12,653 $ 24,760 $ 25,376 Non interest income 2,278 2,037 4,177 3,999 Net income 2,128 2,469 2,436 4,961 Pro forma earnings per share: Basic $ 0.21 $ 0.24 $ 0.24 $ 0.47 Diluted $ 0.20 $ 0.24 $ 0.23 $ 0.47
Eagle National Bancorp, Inc [Member]
Condensed Statement Reflecting Values Assigned to Net Assets	The following condensed statement reflects the values assigned to ENB net assets as of the acquisitions date: Total purchase price $ 24,655 Net assets acquired: Cash $ 8,481 Investments available for sale 36,275 Loans receivable 123,380 Regulatory stock 889 Premises and equipment, net 945 Intangible assets 1,491 Deferred tax assets 715 Other assets 2,174 Certificates of deposits (32,408 ) Deposits other than certificates of deposits (119,865 ) Other liabilities (964 ) 21,113 Goodwill resulting from the ENB merger 3,542

Nature of Operations and Basi33

Nature of Operations and Basis of Presentation - Additional Information (Detail)	Mar. 31, 2016
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, 2016	Mar. 31, 2015	Mar. 31, 2016	Mar. 31, 2015
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	(6,793,799)	(6,695,606)	(6,793,553)	(6,652,080)
Average unearned ESOP shares	(933,558)	(978,835)	(939,247)	(984,555)
Average unearned non-vested shares	(20,584)	(16,344)	(24,681)	(16,590)
Weighted average common shares and common stock equivalents used to calculate basic earnings per share	10,385,154	10,442,310	10,375,614	10,479,870
Additional common stock equivalents (non-vested stock) used to calculate diluted earnings per share	444	386
Additional common stock equivalents (stock options) used to calculate diluted earnings per share	139,100	78,451	140,155	42,727
Weighted average common shares and common stock equivalents used to calculate diluted earnings per share	10,524,697	10,521,147	10,515,770	10,522,597

Earnings Per Share - Additional

Earnings Per Share - Additional Information (Detail) - $ / shares	6 Months Ended
	Mar. 31, 2016	Mar. 31, 2015
Stock Option [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Anti-dilutive securities	48,498	15,290
Price per share of anti-dilutive shares		$ 11.07
Stock Compensation Plan [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Anti-dilutive securities		1,317,910
Price per share of anti-dilutive shares	$ 12.90	$ 12.35

Investment Securities - Summary

Investment Securities - Summary of Amortized Cost and Fair Value of Investment Securities Available for Sale (Detail) - USD ($) $ in Thousands	Mar. 31, 2016	Sep. 30, 2015
Schedule of Available-for-sale Securities [Line Items]
Available for sale, Amortized Cost	$ 383,951	$ 374,969
Available for sale, Gross Unrealized Gains	6,661	5,764
Available for sale, Gross Unrealized Losses	(1,009)	(1,326)
Available for sale, Fair Value	389,603	379,407
Fannie Mae [Member]
Schedule of Available-for-sale Securities [Line Items]
Available for sale, Amortized Cost	134,469	130,476
Available for sale, Gross Unrealized Gains	1,965	2,052
Available for sale, Gross Unrealized Losses	(280)	(541)
Available for sale, Fair Value	136,154	131,987
Freddie Mac [Member]
Schedule of Available-for-sale Securities [Line Items]
Available for sale, Amortized Cost	87,858	88,514
Available for sale, Gross Unrealized Gains	1,224	1,063
Available for sale, Gross Unrealized Losses	(155)	(286)
Available for sale, Fair Value	88,927	89,291
Governmental National Mortgage Association [Member]
Schedule of Available-for-sale Securities [Line Items]
Available for sale, Amortized Cost	14,160	13,201
Available for sale, Gross Unrealized Gains	88	103
Available for sale, Gross Unrealized Losses	(49)	(52)
Available for sale, Fair Value	14,199	13,252
Other Mortgage-Backed Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Available for sale, Amortized Cost	2,409	2,494
Available for sale, Gross Unrealized Losses	(20)	(17)
Available for sale, Fair Value	2,389	2,477
Mortgage-Backed Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Available for sale, Amortized Cost	238,896	234,685
Available for sale, Gross Unrealized Gains	3,277	3,218
Available for sale, Gross Unrealized Losses	(504)	(896)
Available for sale, Fair Value	241,669	237,007
Obligations of States and Political Subdivisions [Member]
Schedule of Available-for-sale Securities [Line Items]
Available for sale, Amortized Cost	55,272	50,094
Available for sale, Gross Unrealized Gains	2,324	1,676
Available for sale, Gross Unrealized Losses	(22)	(145)
Available for sale, Fair Value	57,574	51,625
U.S. Government Agency Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Available for sale, Amortized Cost	32,968	45,799
Available for sale, Gross Unrealized Gains	363	399
Available for sale, Gross Unrealized Losses	(25)	(12)
Available for sale, Fair Value	33,306	46,186
Corporate Obligations [Member]
Schedule of Available-for-sale Securities [Line Items]
Available for sale, Amortized Cost	34,852	22,440
Available for sale, Gross Unrealized Gains	411	157
Available for sale, Gross Unrealized Losses	(367)	(237)
Available for sale, Fair Value	34,896	22,360
Trust-Preferred Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Available for sale, Amortized Cost	1,628	1,613
Available for sale, Gross Unrealized Gains		98
Available for sale, Gross Unrealized Losses	(18)
Available for sale, Fair Value	1,610	1,711
Other Debt Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Available for sale, Amortized Cost	20,310	20,313
Available for sale, Gross Unrealized Gains	286	216
Available for sale, Gross Unrealized Losses	(73)	(36)
Available for sale, Fair Value	20,523	20,493
Total Debt Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Available for sale, Amortized Cost	383,926	374,944
Available for sale, Gross Unrealized Gains	6,661	5,764
Available for sale, Gross Unrealized Losses	(1,009)	(1,326)
Available for sale, Fair Value	389,578	379,382
Equity Securities-Financial Services [Member]
Schedule of Available-for-sale Securities [Line Items]
Available for sale, Amortized Cost	25	25
Available for sale, Fair Value	$ 25	$ 25

Investment Securities - Schedul

Investment Securities - Schedule of Amortized Cost and Fair Value of Debt Securities by Contractual Maturity (Detail) $ in Thousands	Mar. 31, 2016USD ($)
Available-for-sale Securities, Debt Maturities, Amortized Cost Basis, Fiscal Year Maturity [Abstract]
Due in one year or less, Amortized Cost	$ 3,253
Due after one year through five years, Amortized Cost	51,173
Due after five years through ten years, Amortized Cost	80,458
Due after ten years, Amortized Cost	249,042
Total, Amortized Cost	383,926
Due in one year or less, Fair Value	3,264
Due after one year through five years, Fair Value	51,920
Due after five years through ten years, Fair Value	81,861
Due after ten years, Fair Value	252,533
Total, Fair Value	$ 389,578

Investment Securities - Additio

Investment Securities - Additional Information (Detail) - USD ($)	3 Months Ended		6 Months Ended
	Mar. 31, 2016	Mar. 31, 2015	Mar. 31, 2016	Mar. 31, 2015
Schedule of Available-for-sale Securities [Line Items]
Realized gross gains	$ 365,000	$ 204,000	$ 368,000	$ 204,000
Proceeds from the sale of investment securities	11,700,000	$ 3,300,000	$ 29,000,000	$ 3,300,000
Eagle National Bancorp, Inc [Member]
Schedule of Available-for-sale Securities [Line Items]
Realized gross gains	0
Proceeds from the sale of investment securities	16,200,000
Realized gross losses	$ 0

Unrealized Losses on Securiti39

Unrealized Losses on Securities - Schedule of Gross Unrealized Losses and Fair Value (Detail) $ in Thousands	Mar. 31, 2016USD ($)Security	Sep. 30, 2015USD ($)Security
Schedule of Available-for-sale Securities [Line Items]
Number of Securities \| Security	68	72
Fair Value, Less than Twelve Months	$ 41,082	$ 35,650
Gross Unrealized Losses, Less than Twelve Months	(509)	(331)
Fair Value, Twelve Months or Greater	38,879	51,157
Gross Unrealized Losses, Twelve Months or Greater	(500)	(995)
Fair Value, Total	79,961	86,807
Gross Unrealized Losses, Total	$ (1,009)	$ (1,326)
Fannie Mae [Member]
Schedule of Available-for-sale Securities [Line Items]
Number of Securities \| Security	20	22
Fair Value, Less than Twelve Months	$ 7,962	$ 7,238
Gross Unrealized Losses, Less than Twelve Months	(14)	(28)
Fair Value, Twelve Months or Greater	19,159	23,609
Gross Unrealized Losses, Twelve Months or Greater	(266)	(513)
Fair Value, Total	27,121	30,847
Gross Unrealized Losses, Total	$ (280)	$ (541)
Freddie Mac [Member]
Schedule of Available-for-sale Securities [Line Items]
Number of Securities \| Security	11	12
Fair Value, Less than Twelve Months	$ 1,489	$ 1,487
Gross Unrealized Losses, Less than Twelve Months	(9)	(1)
Fair Value, Twelve Months or Greater	12,964	15,477
Gross Unrealized Losses, Twelve Months or Greater	(146)	(285)
Fair Value, Total	14,453	16,964
Gross Unrealized Losses, Total	$ (155)	$ (286)
Governmental National Mortgage Association [Member]
Schedule of Available-for-sale Securities [Line Items]
Number of Securities \| Security	5	2
Fair Value, Less than Twelve Months	$ 4,392
Gross Unrealized Losses, Less than Twelve Months	(46)
Fair Value, Twelve Months or Greater	863	$ 2,209
Gross Unrealized Losses, Twelve Months or Greater	(3)	(52)
Fair Value, Total	5,255	2,209
Gross Unrealized Losses, Total	$ (49)	$ (52)
Other Mortgage-Backed Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Number of Securities \| Security	3	3
Fair Value, Twelve Months or Greater	$ 2,388	$ 2,477
Gross Unrealized Losses, Twelve Months or Greater	(20)	(17)
Fair Value, Total	2,388	2,477
Gross Unrealized Losses, Total	$ (20)	$ (17)
Obligations of States and Political Subdivisions [Member]
Schedule of Available-for-sale Securities [Line Items]
Number of Securities \| Security	6	14
Fair Value, Less than Twelve Months	$ 7,867	$ 9,184
Gross Unrealized Losses, Less than Twelve Months	(22)	(57)
Fair Value, Twelve Months or Greater		4,667
Gross Unrealized Losses, Twelve Months or Greater		(88)
Fair Value, Total	7,867	13,851
Gross Unrealized Losses, Total	$ (22)	$ (145)
U.S. Government Agency Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Number of Securities \| Security	2	3
Fair Value, Less than Twelve Months	$ 1,894	$ 3,246
Gross Unrealized Losses, Less than Twelve Months	(25)	(12)
Fair Value, Total	1,894	3,246
Gross Unrealized Losses, Total	$ (25)	$ (12)
Corporate Obligations [Member]
Schedule of Available-for-sale Securities [Line Items]
Number of Securities \| Security	11	10
Fair Value, Less than Twelve Months	$ 10,482	$ 9,263
Gross Unrealized Losses, Less than Twelve Months	(330)	(207)
Fair Value, Twelve Months or Greater	963	970
Gross Unrealized Losses, Twelve Months or Greater	(37)	(30)
Fair Value, Total	11,445	10,233
Gross Unrealized Losses, Total	$ (367)	$ (237)
Other Debt Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Number of Securities \| Security	8	6
Fair Value, Less than Twelve Months	$ 5,386	$ 5,232
Gross Unrealized Losses, Less than Twelve Months	(45)	(26)
Fair Value, Twelve Months or Greater	2,542	1,748
Gross Unrealized Losses, Twelve Months or Greater	(28)	(10)
Fair Value, Total	7,928	6,980
Gross Unrealized Losses, Total	$ (73)	$ (36)
Trust-Preferred Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Number of Securities \| Security	2
Fair Value, Less than Twelve Months	$ 1,610
Gross Unrealized Losses, Less than Twelve Months	(18)
Fair Value, Total	1,610
Gross Unrealized Losses, Total	$ (18)

Loans Receivable, Net and All40

Loans Receivable, Net and Allowance for Loan Losses - Summary of Loans Receivable (Detail) - USD ($) $ in Thousands	Mar. 31, 2016	Dec. 31, 2015	Dec. 04, 2015	Sep. 30, 2015	Mar. 31, 2015	Dec. 31, 2014	Sep. 30, 2014
Real estate loans:
Total Loans	$ 1,245,028			$ 1,111,037
Less allowance for loan losses	9,415	$ 9,257		8,919	$ 8,668	$ 8,516	$ 8,634
Net loans	1,235,613			1,102,118
Eagle National Bancorp, Inc [Member]
Real estate loans:
Total Loans			$ 123,380
Residential Real Estate Loans [Member]
Real estate loans:
Total Loans	602,085			610,582
Less allowance for loan losses	4,655	4,747		5,140	5,289	5,571	5,573
Residential Real Estate Loans [Member] \| Eagle National Bancorp, Inc [Member]
Real estate loans:
Total Loans			10,743
Construction Real Estate Loans [Member]
Real estate loans:
Total Loans	3,135			878
Commercial Real Estate Loans [Member]
Real estate loans:
Total Loans	286,684			200,004
Less allowance for loan losses	968	858		671	843	676	663
Commercial Real Estate Loans [Member] \| Eagle National Bancorp, Inc [Member]
Real estate loans:
Total Loans			87,336
Commercial Loans [Member]
Real estate loans:
Total Loans	55,170			34,314
Less allowance for loan losses	738	705		693	635	515	528
Commercial Loans [Member] \| Eagle National Bancorp, Inc [Member]
Real estate loans:
Total Loans			16,604
Obligations of States and Political Subdivisions [Member]
Real estate loans:
Total Loans	59,673			59,820
Less allowance for loan losses	196	187		189	87	145	163
Home Equity Loans and Lines of Credit [Member]
Real estate loans:
Total Loans	46,613			39,903
Less allowance for loan losses	389	389		461	468	545	470
Home Equity Loans and Lines of Credit [Member] \| Eagle National Bancorp, Inc [Member]
Real estate loans:
Total Loans			8,632
Auto Loans [Member]
Real estate loans:
Total Loans	188,334			162,193
Less allowance for loan losses	1,925	1,754		1,570	1,023	674	459
Other [Member]
Real estate loans:
Total Loans	3,334			3,343
Less allowance for loan losses	$ 25	$ 27		$ 27	$ 30	$ 26	$ 32
Other [Member] \| Eagle National Bancorp, Inc [Member]
Real estate loans:
Total Loans			$ 65

Loans Receivable, Net and All41

Loans Receivable, Net and Allowance for Loan Losses - Additional Information (Detail)	Dec. 04, 2015USD ($)	Mar. 31, 2016USD ($)ContractContractsSecurityLoan	Mar. 31, 2015USD ($)ContractContractsSecurityLoan	Mar. 31, 2016USD ($)ContractContractsSecurityLoan	Mar. 31, 2015USD ($)ContractContractsSecurityLoan	Sep. 30, 2015USD ($)
Accounts, Notes, Loans and Financing Receivable [Line Items]
Unpaid Principal Balance	$ 3,468,000	$ 31,437,000		$ 31,437,000		$ 32,267,000
Estimated fair value	1,972,000
Contractual cash flows	4,185,000
Preliminary estimate of expected cash flows	2,212,000
Non-accretable discount	1,973,000
Cash flows in excess of estimated fair value	$ 240,000
Criteria in internal rating system				Ten-point
Categories considered as not criticized				Six
Days past due over which loans are considered as substandard				90 days
Minimum internal review amount		500,000		$ 500,000
Minimum external review amount		$ 1,000,000		$ 1,000,000
Number of troubled debt restructuring loans granted \| Contract		4
Number of troubled debt restructuring loans granted terms and rate concessions \| SecurityLoan		2	2	2	5
Troubled debt restructurings granted terms and rate concession		$ 572,000	$ 408,000	$ 572,000	$ 762,000
Number of troubled debt restructuring loans granted terms concessions \| SecurityLoan		1	1	2	3
Troubled debt restructurings granted terms concession		$ 15,000	$ 150,000	$ 96,000	$ 496,000
Number of troubled debt restructuring loans granted interest rate concession \| SecurityLoan		1		1	2
Troubled debt restructurings loans granted interest rate concession		$ 77,000		$ 77,000	$ 366,000
Number of troubled debt restructuring loans granted \| Contract			3	5	10
Number of troubled debt restructurings, loan modified, defaulted within one year of modification \| Contracts		0	3	0	4
Troubled debt restructurings, loan modified, defaulted within one year of modification			$ 521,000		$ 677,000
Other foreclosed assets		$ 2,300,000		$ 2,300,000		$ 2,500,000
Loans Acquired with Deteriorated Credit Quality [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Carrying value of Purchased loans		6,000,000		6,000,000
Consumer Residential Mortgages [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Other foreclosed assets		1,900,000		1,900,000
Formal foreclosure proceeding assets		4,700,000		4,700,000
Eagle National Bancorp, Inc [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Unpaid Principal Balance		3,500,000		3,500,000
Estimated fair value				2,000,000
Contractual cash flows		4,200,000		4,200,000
Preliminary estimate of expected cash flows		2,200,000		2,200,000
Non-accretable discount				2,000,000
Cash flows in excess of estimated fair value		$ 240,000		$ 240,000

Loans Receivable, Net and All42

Loans Receivable, Net and Allowance for Loan Losses - Schedule of Investment and Unpaid Principal Balances for Impaired Loans (Detail) - USD ($) $ in Thousands	Dec. 04, 2015	Mar. 31, 2016	Mar. 31, 2015	Mar. 31, 2016	Mar. 31, 2015	Sep. 30, 2015
Financing Receivable, Impaired [Line Items]
Recorded Investment		$ 26,975		$ 26,975		$ 28,709
Average Recorded Investment		26,622	$ 29,292	27,086	$ 29,829
Unpaid Principal Balance	$ 3,468	31,437		31,437		32,267
Associated Allowance		760		760		568
Interest	717	196	277	423	600
Contractual cash flows	4,185
Non-accretable discount	(1,973)
Expected cash flows	2,212
Accretable discount	(240)
Estimated fair value	$ 1,972
With no Specific Allowance Recorded [Member]
Financing Receivable, Impaired [Line Items]
Recorded Investment		22,087		22,087		25,937
Average Recorded Investment		22,165	26,462	23,225	26,807
Unpaid Principal Balance		25,949		25,949		29,260
Interest		190	257	411	554
With an Allowance Recorded [Member]
Financing Receivable, Impaired [Line Items]
Recorded Investment		4,888		4,888		2,772
Average Recorded Investment		4,457	2,830	3,861	3,022
Unpaid Principal Balance		5,488		5,488		3,007
Associated Allowance		760		760		568
Interest		6	20	12	46
Residential Real Estate Loans [Member]
Financing Receivable, Impaired [Line Items]
Recorded Investment		10,008		10,008		11,985
Average Recorded Investment		9,975	12,962	10,676	13,193
Unpaid Principal Balance		12,138		12,138		14,160
Associated Allowance		343		343		373
Interest		26	83	57	206
Residential Real Estate Loans [Member] \| With no Specific Allowance Recorded [Member]
Financing Receivable, Impaired [Line Items]
Recorded Investment		7,344		7,344		9,552
Average Recorded Investment		7,296	10,551	8,040	10,740
Unpaid Principal Balance		9,071		9,071		11,521
Interest		22	64	48	163
Residential Real Estate Loans [Member] \| With an Allowance Recorded [Member]
Financing Receivable, Impaired [Line Items]
Recorded Investment		2,664		2,664		2,433
Average Recorded Investment		2,679	2,411	2,636	2,453
Unpaid Principal Balance		3,067		3,067		2,639
Associated Allowance		343		343		373
Interest		4	19	9	43
Commercial Real Estate Loans [Member]
Financing Receivable, Impaired [Line Items]
Recorded Investment		13,679		13,679		15,100
Average Recorded Investment		13,618	15,560	13,882	15,888
Unpaid Principal Balance		15,745		15,745		16,316
Associated Allowance		170		170
Interest		131	190	307	384
Commercial Real Estate Loans [Member] \| With no Specific Allowance Recorded [Member]
Financing Receivable, Impaired [Line Items]
Recorded Investment		11,944		11,944		15,100
Average Recorded Investment		12,128	15,247	12,908	15,446
Unpaid Principal Balance		13,862		13,862		16,316
Interest		131	190	307	384
Commercial Real Estate Loans [Member] \| With an Allowance Recorded [Member]
Financing Receivable, Impaired [Line Items]
Recorded Investment		1,735		1,735
Average Recorded Investment		1,490	313	974	442
Unpaid Principal Balance		1,883		1,883
Associated Allowance		170		170
Commercial Loans [Member]
Financing Receivable, Impaired [Line Items]
Recorded Investment		1,939		1,939		204
Average Recorded Investment		1,925	343	1,354	334
Unpaid Principal Balance		1,954		1,954		216
Interest		37	2	52	4
Commercial Loans [Member] \| With no Specific Allowance Recorded [Member]
Financing Receivable, Impaired [Line Items]
Recorded Investment		1,939		1,939		204
Average Recorded Investment		1,919	343	1,350	334
Unpaid Principal Balance		1,954		1,954		216
Interest		37	2	52	4
Commercial Loans [Member] \| With an Allowance Recorded [Member]
Financing Receivable, Impaired [Line Items]
Average Recorded Investment		6		4
Home Equity Loans and Lines of Credit [Member]
Financing Receivable, Impaired [Line Items]
Recorded Investment		640		640		795
Average Recorded Investment		653	305	738	260
Unpaid Principal Balance		748		748		836
Associated Allowance		56		56		64
Interest				2	2
Home Equity Loans and Lines of Credit [Member] \| With no Specific Allowance Recorded [Member]
Financing Receivable, Impaired [Line Items]
Recorded Investment		583		583		731
Average Recorded Investment		594	266	672	234
Unpaid Principal Balance		642		642		743
Interest				2	2
Home Equity Loans and Lines of Credit [Member] \| With an Allowance Recorded [Member]
Financing Receivable, Impaired [Line Items]
Recorded Investment		57		57		64
Average Recorded Investment		59	39	66	26
Unpaid Principal Balance		106		106		93
Associated Allowance		56		56		64
Auto Loans [Member]
Financing Receivable, Impaired [Line Items]
Recorded Investment		707		707		625
Average Recorded Investment		450	122	436	154
Unpaid Principal Balance		827		827		739
Associated Allowance		191		191		131
Interest		2	2	5	4
Auto Loans [Member] \| With no Specific Allowance Recorded [Member]
Financing Receivable, Impaired [Line Items]
Recorded Investment		275		275		350
Average Recorded Investment		228	55	255	53
Unpaid Principal Balance		395		395		464
Interest			1	2	1
Auto Loans [Member] \| With an Allowance Recorded [Member]
Financing Receivable, Impaired [Line Items]
Recorded Investment		432		432		275
Average Recorded Investment		222	67	181	101
Unpaid Principal Balance		432		432		275
Associated Allowance		191		191		$ 131
Interest		2	$ 1	3	$ 3
Other [Member]
Financing Receivable, Impaired [Line Items]
Recorded Investment		2		2
Average Recorded Investment		1
Unpaid Principal Balance		25		25
Other [Member] \| With no Specific Allowance Recorded [Member]
Financing Receivable, Impaired [Line Items]
Recorded Investment		2		2
Unpaid Principal Balance		25		$ 25
Other [Member] \| With an Allowance Recorded [Member]
Financing Receivable, Impaired [Line Items]
Average Recorded Investment		$ 1

Loans Receivable, Net and All43

Loans Receivable, Net and Allowance for Loan Losses - Changes in Accretable Yield for Purchased Credit-Impaired Losses (Detail) - USD ($) $ in Thousands	6 Months Ended
	Mar. 31, 2016	Mar. 31, 2015
Receivables [Abstract]
Balance at beginning of period	$ 258	$ 170
Reclassification and other	240
Accretion	(133)	(14)
Balance at end of period	$ 365	$ 156

Loans Receivable, Net and All44

Loans Receivable, Net and Allowance for Loan Losses - Summary of Additional Information Regarding Loans Acquired and Accounted (Detail) - USD ($) $ in Thousands	Mar. 31, 2016	Sep. 30, 2015
Accounts, Notes, Loans and Financing Receivable [Line Items]
Carrying amount	$ 1,245,028	$ 1,111,037
Loans Acquired with Deteriorated Credit Quality [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Outstanding balance	7,622	4,779
Carrying amount	$ 5,995	$ 4,162

Loans Receivable, Net and All45

Loans Receivable, Net and Allowance for Loan Losses - Schedule of Loans Evaluated for Impairment (Detail) - USD ($) $ in Thousands	Mar. 31, 2016	Sep. 30, 2015
Financing Receivable, Recorded Investment [Line Items]
Total Loans	$ 1,245,028	$ 1,111,037
Individually Evaluated for Impairment	26,975	28,709
Collectively Evaluated for Impairment	1,212,058	1,078,166
Loans Acquired with Deteriorated Credit Quality [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Loans	5,995	4,162
Residential Real Estate Loans [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Loans	602,085	610,582
Individually Evaluated for Impairment	10,008	11,985
Collectively Evaluated for Impairment	592,077	598,597
Commercial Real Estate Loans [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Loans	286,684	200,004
Individually Evaluated for Impairment	13,679	15,100
Collectively Evaluated for Impairment	268,047	180,796
Commercial Real Estate Loans [Member] \| Loans Acquired with Deteriorated Credit Quality [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Loans	4,958	4,108
Commercial Real Estate Loans [Member] \| Construction Real Estate Loans [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Loans	3,135	878
Collectively Evaluated for Impairment	3,135	878
Commercial Loans [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Loans	55,170	34,314
Individually Evaluated for Impairment	1,939	204
Collectively Evaluated for Impairment	52,820	34,056
Commercial Loans [Member] \| Loans Acquired with Deteriorated Credit Quality [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Loans	411	54
Obligations of States and Political Subdivisions [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Loans	59,673	59,820
Collectively Evaluated for Impairment	59,673	59,820
Home Equity Loans and Lines of Credit [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Loans	46,613	39,903
Individually Evaluated for Impairment	640	795
Collectively Evaluated for Impairment	45,347	39,108
Home Equity Loans and Lines of Credit [Member] \| Loans Acquired with Deteriorated Credit Quality [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Loans	626
Auto Loans [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Loans	188,334	162,193
Individually Evaluated for Impairment	707	625
Collectively Evaluated for Impairment	187,627	161,568
Other [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Loans	3,334	3,343
Individually Evaluated for Impairment	2
Collectively Evaluated for Impairment	$ 3,332	$ 3,343

Loans Receivable, Net and All46

Loans Receivable, Net and Allowance for Loan Losses - Classes of Loan Portfolio, Internal Risk Rating System (Detail) - USD ($) $ in Thousands	Mar. 31, 2016	Sep. 30, 2015
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loan, total	$ 401,527	$ 294,138
Commercial Real Estate Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loan, total	286,684	200,004
Commercial Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loan, total	55,170	34,314
Obligations of States and Political Subdivisions [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loan, total	59,673	59,820
Pass [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loan, total	366,173	268,137
Pass [Member] \| Commercial Real Estate Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loan, total	254,939	174,516
Pass [Member] \| Commercial Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loan, total	51,561	33,801
Pass [Member] \| Obligations of States and Political Subdivisions [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loan, total	59,673	59,820
Special Mention [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loan, total	10,908	4,521
Special Mention [Member] \| Commercial Real Estate Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loan, total	10,578	4,521
Special Mention [Member] \| Commercial Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loan, total	330
Substandard [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loan, total	24,446	21,480
Substandard [Member] \| Commercial Real Estate Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loan, total	21,167	20,967
Substandard [Member] \| Commercial Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loan, total	$ 3,279	$ 513

Loans Receivable, Net and All47

Loans Receivable, Net and Allowance for Loan Losses - Schedule of Performing or Non-Performing Loans (Detail) - USD ($) $ in Thousands	Mar. 31, 2016	Sep. 30, 2015
Financing Receivable, Recorded Investment [Line Items]
Total	$ 843,501	$ 816,899
Residential Real Estate Loans [Member]
Financing Receivable, Recorded Investment [Line Items]
Total	602,085	610,582
Commercial Real Estate Loans [Member] \| Construction Real Estate Loans [Member]
Financing Receivable, Recorded Investment [Line Items]
Total	3,135	878
Home Equity Loans and Lines of Credit [Member]
Financing Receivable, Recorded Investment [Line Items]
Total	46,613	39,903
Auto Loans [Member]
Financing Receivable, Recorded Investment [Line Items]
Total	188,334	162,193
Other [Member]
Financing Receivable, Recorded Investment [Line Items]
Total	3,334	3,343
Performing [Member]
Financing Receivable, Recorded Investment [Line Items]
Total	831,892	806,050
Performing [Member] \| Residential Real Estate Loans [Member]
Financing Receivable, Recorded Investment [Line Items]
Total	592,400	600,810
Performing [Member] \| Commercial Real Estate Loans [Member] \| Construction Real Estate Loans [Member]
Financing Receivable, Recorded Investment [Line Items]
Total	3,135	878
Performing [Member] \| Home Equity Loans and Lines of Credit [Member]
Financing Receivable, Recorded Investment [Line Items]
Total	45,322	39,213
Performing [Member] \| Auto Loans [Member]
Financing Receivable, Recorded Investment [Line Items]
Total	187,738	161,827
Performing [Member] \| Other [Member]
Financing Receivable, Recorded Investment [Line Items]
Total	3,297	3,322
Nonperforming [Member]
Financing Receivable, Recorded Investment [Line Items]
Total	11,609	10,849
Nonperforming [Member] \| Residential Real Estate Loans [Member]
Financing Receivable, Recorded Investment [Line Items]
Total	9,685	9,772
Nonperforming [Member] \| Home Equity Loans and Lines of Credit [Member]
Financing Receivable, Recorded Investment [Line Items]
Total	1,291	690
Nonperforming [Member] \| Auto Loans [Member]
Financing Receivable, Recorded Investment [Line Items]
Total	596	366
Nonperforming [Member] \| Other [Member]
Financing Receivable, Recorded Investment [Line Items]
Total	$ 37	$ 21

Loans Receivable, Net and All48

Loans Receivable, Net and Allowance for Loan Losses - Classes of Loan Portfolio Summarized by Aging Categories (Detail) - USD ($) $ in Thousands	Mar. 31, 2016	Sep. 30, 2015
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current	$ 1,218,951	$ 1,085,576
31-60 Days Past Due	2,648	3,492
61-90 Days Past Due	833	1,864
Greater than 90 Days Past Due	0	0
Non-accrual	22,596	20,105
Total Past Due	26,077	25,461
Total Loans	1,245,028	1,111,037
Residential Real Estate Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current	590,617	598,190
31-60 Days Past Due	1,321	1,575
61-90 Days Past Due	462	1,045
Greater than 90 Days Past Due	0	0
Non-accrual	9,685	9,772
Total Past Due	11,468	12,392
Total Loans	602,085	610,582
Construction [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current	3,135	878
Greater than 90 Days Past Due	0	0
Total Loans	3,135	878
Commercial Real Estate Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current	275,800	190,440
31-60 Days Past Due	214	137
61-90 Days Past Due	157	587
Greater than 90 Days Past Due	0	0
Non-accrual	10,513	8,840
Total Past Due	10,884	9,564
Total Loans	286,684	200,004
Commercial Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current	54,598	33,545
31-60 Days Past Due	98	346
61-90 Days Past Due		7
Greater than 90 Days Past Due	0	0
Non-accrual	474	416
Total Past Due	572	769
Total Loans	55,170	34,314
Obligations of States and Political Subdivisions [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current	59,673	59,820
Greater than 90 Days Past Due	0	0
Total Loans	59,673	59,820
Home Equity Loans and Lines of Credit [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current	45,109	39,136
31-60 Days Past Due	121	32
61-90 Days Past Due	92	45
Greater than 90 Days Past Due	0	0
Non-accrual	1,291	690
Total Past Due	1,504	767
Total Loans	46,613	39,903
Auto Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current	186,764	160,272
31-60 Days Past Due	852	1,375
61-90 Days Past Due	122	180
Greater than 90 Days Past Due	0	0
Non-accrual	596	366
Total Past Due	1,570	1,921
Total Loans	188,334	162,193
Other [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current	3,255	3,295
31-60 Days Past Due	42	27
Greater than 90 Days Past Due	0	0
Non-accrual	37	21
Total Past Due	79	48
Total Loans	$ 3,334	$ 3,343

Loans Receivable, Net and All49

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, 2016	Mar. 31, 2015	Mar. 31, 2016	Mar. 31, 2015	Sep. 30, 2015
Financing Receivable, Allowance for Credit Losses [Line Items]
Balance, Beginning of period	$ 9,257	$ 8,516	$ 8,919	$ 8,634
Individually evaluated for impairment	760		760		$ 568
Charge-offs	(580)	(418)	(887)	(1,024)
Collectively evaluated for impairment	8,655		8,655		8,351
Recoveries	138	45	183	83
Provision	600	525	1,200	975
Balance, End of period	9,415	8,668	9,415	8,668
Residential Real Estate Loans [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Balance, Beginning of period	4,747	5,571	5,140	5,573
Individually evaluated for impairment	343		343		373
Charge-offs	(308)	(251)	(399)	(760)
Collectively evaluated for impairment	4,312		4,312		4,767
Recoveries		4	3	22
Provision	216	(35)	(89)	454
Balance, End of period	4,655	5,289	4,655	5,289
Commercial Real Estate Loans [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Balance, Beginning of period	858	676	671	663
Individually evaluated for impairment	170		170
Charge-offs	(9)	(42)	(9)	(53)
Collectively evaluated for impairment	798		798		671
Recoveries	52	20	52	31
Provision	67	189	254	202
Balance, End of period	968	843	968	843
Commercial Real Estate Loans [Member] \| Construction Real Estate Loans [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Balance, Beginning of period	14	13	7	11
Collectively evaluated for impairment	24		24		7
Provision	10	4	17	6
Balance, End of period	24	17	24	17
Commercial Loans [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Balance, Beginning of period	705	515	693	528
Individually evaluated for impairment	0		0
Charge-offs			(3)	(27)
Collectively evaluated for impairment	738		738		693
Recoveries		9	1	9
Provision	33	111	47	125
Balance, End of period	738	635	738	635
Obligations of States and Political Subdivisions [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Balance, Beginning of period	187	145	189	163
Collectively evaluated for impairment	196		196		189
Provision	9	(58)	7	(76)
Balance, End of period	196	87	196	87
Home Equity Loans and Lines of Credit [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Balance, Beginning of period	389	545	461	470
Individually evaluated for impairment	56		56		64
Charge-offs	(29)		(54)	(19)
Collectively evaluated for impairment	333		333		397
Recoveries	3	4	4	12
Provision	26	(81)	(22)	5
Balance, End of period	389	468	389	468
Auto Loans [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Balance, Beginning of period	1,754	674	1,570	459
Individually evaluated for impairment	191		191		131
Charge-offs	(234)	(125)	(422)	(165)
Collectively evaluated for impairment	1,734		1,734		1,439
Recoveries	80	8	117	9
Provision	325	466	660	720
Balance, End of period	1,925	1,023	1,925	1,023
Other [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Balance, Beginning of period	27	26	27	32
Collectively evaluated for impairment	25		25		27
Recoveries	3		6
Provision	(5)	4	(8)	(2)
Balance, End of period	25	30	25	30
Unallocated [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Balance, Beginning of period	576	351	161	735
Collectively evaluated for impairment	495		495		$ 161
Provision	(81)	(75)	334	(459)
Balance, End of period	$ 495	$ 276	$ 495	$ 276

Loans Receivable, Net and All50

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, 2016USD ($)Contract	Mar. 31, 2015USD ($)Contract	Mar. 31, 2016USD ($)Contract	Mar. 31, 2015USD ($)Contract
Financing Receivable, Modifications [Line Items]
Number of Contracts \| Contract		3	5	10
Real Estate Loans [Member] \| Residential [Member]
Financing Receivable, Modifications [Line Items]
Number of Contracts \| Contract	3	2	4	9
Pre-Modification Outstanding Recorded Investment	$ 587	$ 408	$ 668	$ 1,474
Post-Modification Outstanding Recorded Investment	$ 587	$ 408	$ 668	$ 1,474
Real Estate Loans [Member] \| Commercial Real Estate Loans [Member]
Financing Receivable, Modifications [Line Items]
Number of Contracts \| Contract	1
Pre-Modification Outstanding Recorded Investment	$ 77
Post-Modification Outstanding Recorded Investment	$ 77
Home Equity Loans and Lines of Credit [Member]
Financing Receivable, Modifications [Line Items]
Number of Contracts \| Contract		1	1	1
Pre-Modification Outstanding Recorded Investment		$ 150	$ 77	$ 150
Post-Modification Outstanding Recorded Investment		$ 150	$ 77	$ 150
Troubled Debt Restructurings [Member]
Financing Receivable, Modifications [Line Items]
Number of Contracts \| Contract	4	3	5	10
Pre-Modification Outstanding Recorded Investment	$ 664	$ 558	$ 745	$ 1,624
Post-Modification Outstanding Recorded Investment	$ 664	$ 558	$ 745	$ 1,624

Deposits - Schedule of Deposits

Deposits - Schedule of Deposits by Major Classifications (Detail) - USD ($) $ in Thousands	Mar. 31, 2016	Sep. 30, 2015
Banking and Thrift [Abstract]
Non-interest bearing demand accounts	$ 150,593	$ 98,514
Interest bearing demand accounts	107,563	110,268
Money market accounts	202,786	162,418
Savings and club accounts	143,406	129,227
Certificates of deposit	605,758	596,327
Total	$ 1,210,106	$ 1,096,754

Net Periodic Benefit Cost-Def52

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, 2016	Mar. 31, 2015	Mar. 31, 2016	Mar. 31, 2015
Compensation Related Costs [Abstract]
Service cost	$ 249	$ 218	$ 498	$ 436
Interest cost	245	206	490	412
Expected return on plan assets	(311)	(308)	(622)	(616)
Amortization of unrecognized loss	119	60	239	120
Net periodic benefit cost	$ 302	$ 176	$ 605	$ 352

Net Periodic Benefit Cost-Def53

Net Periodic Benefit Cost-Defined Benefit Plan - Additional Information (Detail)	1 Months Ended
	Jun. 30, 2016USD ($)
Scenario, Forecast [Member]
Compensation Related Costs Disclosure [Line Items]
Expected contribution of bank	$ 650,000

Equity Incentive Plan - Additio

Equity Incentive Plan - Additional Information (Detail) - USD ($)	Mar. 04, 2016	May. 20, 2015	Jul. 22, 2014	Apr. 01, 2013	May. 23, 2008	Mar. 31, 2016	Mar. 31, 2015
Compensation Related Costs Disclosure [Line Items]
Option vesting period						5 years
Option expiration period						10 years
Share-based compensation expense						$ 79,000	$ 51,000
Equity Incentive Plan [Member]
Compensation Related Costs Disclosure [Line Items]
Common stock issuance, Grant						2,377,326
Equity Incentive Plan 2016 [Member]
Compensation Related Costs Disclosure [Line Items]
Common stock issuance, Grant						250,000
Stock Option [Member]
Compensation Related Costs Disclosure [Line Items]
Number of available shares						1,698,090
Restricted Stock [Member]
Compensation Related Costs Disclosure [Line Items]
Number of available shares						679,236
Shares granted	23,491	21,843	19,880	30,000	590,320
Share-based compensation expense						$ 204,000	$ 51,000
Restricted Stock [Member] \| 2013 [Member]
Compensation Related Costs Disclosure [Line Items]
Restricted shares vesting period						18 months
Restricted Stock [Member] \| 2014 [Member]
Compensation Related Costs Disclosure [Line Items]
Restricted shares vesting period						39 months
Outstanding nonvested restricted stock						9,932
Expected future expense						$ 102,000
Remaining vesting periods						1 year 6 months
Restricted Stock [Member] \| 2015 [Member]
Compensation Related Costs Disclosure [Line Items]
Restricted shares vesting period						40 months
Outstanding nonvested restricted stock						16,379
Expected future expense						$ 214,000
Remaining vesting periods						2 years 6 months
Restricted Stock [Member] \| 2016 [Member]
Compensation Related Costs Disclosure [Line Items]
Restricted shares vesting period						43 months
Outstanding nonvested restricted stock						23,491
Expected future expense						$ 310,000
Remaining vesting periods						3 years 6 months
Non Qualified Stock Option [Member]
Compensation Related Costs Disclosure [Line Items]
Shares granted					1,140,469
Incentive Stock Option [Member]
Compensation Related Costs Disclosure [Line Items]
Shares granted					317,910

Equity Incentive Plan - Schedul

Equity Incentive Plan - Schedule of Stock Option Activity (Detail) - USD ($) $ / shares in Units, $ in Thousands	6 Months Ended	12 Months Ended
	Mar. 31, 2016	Sep. 30, 2015
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]
Number of Stock Options, Outstanding, September 30, 2015	1,314,580
Number of Stock Options, Granted	0
Number of Stock Options, Exercised	(140,254)
Number of Stock Options, Forfeited	0
Number of Stock Options, Outstanding, March 31, 2016	1,174,326	1,314,580
Number of Stock Options, Exercisable at year-end	1,174,326
Weighted-average Exercise Price, Outstanding, September 30, 2015	$ 12.35
Weighted-average Exercise Price, Granted	0
Weighted-average Exercise Price, Exercised	12.35
Weighted-average Exercise Price, Forfeited	0
Weighted-average Exercise Price, Outstanding, March 31, 2016	12.35	$ 12.35
Weighted-average Exercise Price, Exercisable at year-end	$ 12.35
Weighted-average Remaining Contractual Term (in years), Outstanding	2 years 2 months 1 day	2 years 8 months 1 day
Weighted-average Remaining Contractual Term (in years), Granted	0 years
Weighted-average Remaining Contractual Term (in years), Exercised	2 years 2 months 1 day
Weighted-average Remaining Contractual Term (in years), Forfeited	0 years
Weighted-average Remaining Contractual Term (in years), Outstanding, Ending Balance	2 years 2 months 1 day	2 years 8 months 1 day
Weighted-average Remaining Contractual Term (in years), Exercisable, Ending Balance	2 years 2 months 1 day
Aggregate Intrinsic Value, Outstanding, Beginning Balance	$ 802,000
Aggregate Intrinsic Value, Granted	0
Aggregate Intrinsic Value, Exercised	0
Aggregate Intrinsic Value, Forfeited	0
Aggregate Intrinsic Value, Outstanding, Ending Balance	1,339,000	$ 802,000
Aggregate Intrinsic Value, Exercisable at year-end	$ 1,339,000

Equity Incentive Plan - Sched56

Equity Incentive Plan - Schedule of Restricted Stock Option Activity (Detail)	6 Months Ended
	Mar. 31, 2016$ / sharesshares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of Restricted Stock, Granted	0
Number of Restricted Stock, Forfeited	0
Weighted-average Grant Date Fair Value, Forfeited \| $ / shares	$ 0
Restricted Stock [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of Restricted Stock, Nonvested at September 30, 2015	26,311
Number of Restricted Stock, Granted	23,491
Number of Restricted Stock, Vested	0
Number of Restricted Stock, Forfeited	0
Number of Restricted Stock, Nonvested at March 31, 2016	49,802
Weighted-average Grant Date Fair Value, Nonvested at September 30, 2015 \| $ / shares	$ 12.30
Weighted-average Grant Date Fair Value, Granted \| $ / shares	13.52
Weighted-average Grant Date Fair Value, Vested \| $ / shares	0
Weighted-average Grant Date Fair Value, Forfeited \| $ / shares	0
Weighted-average Grant Date Fair Value, Nonvested at March 31, 2016 \| $ / shares	$ 12.88

Fair Value Measurement - Schedu

Fair Value Measurement - Schedule of Securities, Other Real Estate Owned and Impaired Loans Measured at Fair Value (Detail) - USD ($) $ in Thousands	Mar. 31, 2016	Sep. 30, 2015
Securities available-for-sale measured on a recurring basis
Total debt and equity securities	$ 389,603	$ 379,407
Foreclosed real estate owned	2,316	2,480
Impaired loans	26,215	28,141
Mortgage servicing rights	512	412
Mortgage-Backed Securities [Member]
Securities available-for-sale measured on a recurring basis
Total debt and equity securities	241,669	237,007
Obligations of States and Political Subdivisions [Member]
Securities available-for-sale measured on a recurring basis
Total debt and equity securities	57,574	51,625
U.S. Government Agency Securities [Member]
Securities available-for-sale measured on a recurring basis
Total debt and equity securities	33,306	46,186
Corporate Obligations [Member]
Securities available-for-sale measured on a recurring basis
Total debt and equity securities	34,896	22,360
Trust-Preferred Securities [Member]
Securities available-for-sale measured on a recurring basis
Total debt and equity securities	1,610	1,711
Other Debt Securities [Member]
Securities available-for-sale measured on a recurring basis
Total debt and equity securities	20,523	20,493
Equity Securities-Financial Services [Member]
Securities available-for-sale measured on a recurring basis
Total debt and equity securities	25	25
Quoted Prices in Active Markets for Identical Assets (Level 1) [Member]
Securities available-for-sale measured on a recurring basis
Total debt and equity securities	25	25
Quoted Prices in Active Markets for Identical Assets (Level 1) [Member] \| Equity Securities-Financial Services [Member]
Securities available-for-sale measured on a recurring basis
Total debt and equity securities	25	25
Significant Other Observable Inputs (Level 2) [Member]
Securities available-for-sale measured on a recurring basis
Total debt and equity securities	382,506	375,171
Significant Other Observable Inputs (Level 2) [Member] \| Mortgage-Backed Securities [Member]
Securities available-for-sale measured on a recurring basis
Total debt and equity securities	241,669	237,007
Significant Other Observable Inputs (Level 2) [Member] \| Obligations of States and Political Subdivisions [Member]
Securities available-for-sale measured on a recurring basis
Total debt and equity securities	57,574	51,625
Significant Other Observable Inputs (Level 2) [Member] \| U.S. Government Agency Securities [Member]
Securities available-for-sale measured on a recurring basis
Total debt and equity securities	33,306	46,186
Significant Other Observable Inputs (Level 2) [Member] \| Corporate Obligations [Member]
Securities available-for-sale measured on a recurring basis
Total debt and equity securities	29,934	20,360
Significant Other Observable Inputs (Level 2) [Member] \| Other Debt Securities [Member]
Securities available-for-sale measured on a recurring basis
Total debt and equity securities	20,023	19,993
Significant Unobservable Inputs (Level 3) [Member]
Securities available-for-sale measured on a recurring basis
Total debt and equity securities	7,072	4,211
Foreclosed real estate owned	2,316	2,480
Impaired loans	26,215	28,141
Mortgage servicing rights	512	412
Significant Unobservable Inputs (Level 3) [Member] \| Corporate Obligations [Member]
Securities available-for-sale measured on a recurring basis
Total debt and equity securities	4,962	2,000
Significant Unobservable Inputs (Level 3) [Member] \| Trust-Preferred Securities [Member]
Securities available-for-sale measured on a recurring basis
Total debt and equity securities	1,610	1,711
Significant Unobservable Inputs (Level 3) [Member] \| Other Debt Securities [Member]
Securities available-for-sale measured on a recurring basis
Total debt and equity securities	$ 500	$ 500

Fair Value Measurement - Sche58

Fair Value Measurement - Schedule of Changes in Fair Value of Level III Investments (Detail) - Significant Unobservable Inputs (Level 3) [Member] - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Mar. 31, 2016	Mar. 31, 2015	Mar. 31, 2016	Mar. 31, 2015
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Beginning balance	$ 7,136	$ 2,200	$ 4,211	$ 2,230
Purchases, sales, issuances, settlements, net		2,000	3,000	2,000
Total unrealized gain:
Included in earnings	0	0	0	0
Included in other comprehensive income	(64)	40	(139)	10
Transfers in and/or out of Level III	0	0	0	0
Ending balance	$ 7,072	$ 4,240	$ 7,072	$ 4,240

Fair Value Measurement - Additi

Fair Value Measurement - Additional Information (Detail)	6 Months Ended	12 Months Ended
Fair Value Measurement - Additional Information (Detail)	Mar. 31, 2016USD ($)Loans	Sep. 30, 2015USD ($)Loans
Fair Value Disclosures [Abstract]
Number of impaired loans \| Loans	208	211
Impaired loans, carrying value	$ 27,000,000	$ 28,700,000
Impaired loans, valuation allowance	760,000	568,000
Impaired loans, net fair value	$ 26,200,000	$ 28,100,000

Fair Value Measurement - Summar

Fair Value Measurement - Summary of Additional Quantitative Information about Assets Measured at Fair Value on Nonrecurring Basis (Detail) - USD ($) $ in Thousands	6 Months Ended
	Mar. 31, 2016	Sep. 30, 2015
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Unobservable Input	Prepayment speeds
Fair value input appraisal adjustments	17.70%	17.90%
Minimum [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair value input appraisal adjustments	7.00%	5.00%
Maximum [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair value input appraisal adjustments	81.00%	79.00%
Impaired Loans [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair Value Estimate	$ 26,215	$ 28,141
Unobservable Input	Appraisal adjustments
Fair value input appraisal adjustments	23.80%	22.30%
Impaired Loans [Member] \| Minimum [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair value input appraisal adjustments	0.00%	0.00%
Impaired Loans [Member] \| Maximum [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair value input appraisal adjustments	50.00%	60.00%
Foreclosed Real Estate Owned [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair Value Estimate	$ 2,316	$ 2,480
Unobservable Input	Appraisal adjustments
Fair value input appraisal adjustments	22.70%	21.30%
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	20.00%	20.00%
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	49.00%	46.00%
Mortgage Servicing Rights [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair Value Estimate	$ 512	$ 412
Unobservable Input	Discount rate
Fair value input appraisal adjustments	10.30%	10.10%
Mortgage Servicing Rights [Member] \| Minimum [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair value input appraisal adjustments	6.00%	6.00%
Mortgage Servicing Rights [Member] \| Maximum [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair value input appraisal adjustments	11.00%	11.00%
Appraisal of Collateral [Member] \| Impaired Loans [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Valuation Techniques	Appraisal of collateral
Appraisal of Collateral [Member] \| Foreclosed Real Estate Owned [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Valuation Techniques	Appraisal of collateral
Appraisal of Collateral [Member] \| Mortgage Servicing Rights [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Valuation Techniques	Discounted cash flow

Fair Value Measurement - Sche61

Fair Value Measurement - Schedule of Estimate of Fair Value Using Methodologies (Detail) - USD ($) $ in Thousands	Mar. 31, 2016	Sep. 30, 2015	Mar. 31, 2015	Sep. 30, 2014
Financial assets:
Cash and cash equivalents	$ 23,883	$ 18,758	$ 16,610	$ 22,301
Certificates of deposit	1,500	1,750
Investment and mortgage backed securities available for sale	389,603	379,407
Loans receivable, net	1,235,613	1,102,118
Mortgage servicing rights	512	412
Bank owned life insurance	31,119	30,655
Financial liabilities:
Deposits	1,210,106	1,096,754
Short-term borrowings	126,243	91,339
Other borrowings	230,601	229,101
Advances by borrowers for taxes and insurance	8,514	4,273
Quoted Prices in Active Markets for Identical Assets (Level 1) [Member]
Financial assets:
Investment and mortgage backed securities available for sale	25	25
Significant Other Observable Inputs (Level 2) [Member]
Financial assets:
Investment and mortgage backed securities available for sale	382,506	375,171
Significant Unobservable Inputs (Level 3) [Member]
Financial assets:
Investment and mortgage backed securities available for sale	7,072	4,211
Mortgage servicing rights	512	412
Carrying Value [Member]
Financial assets:
Cash and cash equivalents	23,883	18,758
Certificates of deposit	1,500	1,750
Investment and mortgage backed securities available for sale	389,603	379,407
Loans receivable, net	1,235,613	1,102,118
Accrued interest receivable	5,730	5,068
Regulatory stock	15,492	13,831
Mortgage servicing rights	512	412
Bank owned life insurance	31,119	30,655
Financial liabilities:
Deposits	1,210,106	1,096,754
Short-term borrowings	126,243	91,339
Other borrowings	230,601	229,101
Advances by borrowers for taxes and insurance	8,514	4,273
Accrued interest payable	1,076	866
Estimated Fair Value [Member]
Financial assets:
Cash and cash equivalents	23,883	18,758
Certificates of deposit	1,526	1,774
Investment and mortgage backed securities available for sale	389,603	379,407
Loans receivable, net	1,255,642	1,123,436
Accrued interest receivable	5,730	5,068
Regulatory stock	15,492	13,831
Mortgage servicing rights	512	412
Bank owned life insurance	31,119	30,655
Financial liabilities:
Deposits	1,214,721	1,100,677
Short-term borrowings	126,243	91,339
Other borrowings	232,085	230,255
Advances by borrowers for taxes and insurance	8,514	4,273
Accrued interest payable	1,076	866
Estimated Fair Value [Member] \| Quoted Prices in Active Markets for Identical Assets (Level 1) [Member]
Financial assets:
Cash and cash equivalents	23,883	18,758
Investment and mortgage backed securities available for sale	25	25
Accrued interest receivable	5,730	5,068
Regulatory stock	15,492	13,831
Bank owned life insurance	31,119	30,655
Financial liabilities:
Deposits	604,347	500,427
Short-term borrowings	126,243	91,339
Advances by borrowers for taxes and insurance	8,514	4,273
Accrued interest payable	1,076	866
Estimated Fair Value [Member] \| Significant Other Observable Inputs (Level 2) [Member]
Financial assets:
Investment and mortgage backed securities available for sale	382,506	375,171
Estimated Fair Value [Member] \| Significant Unobservable Inputs (Level 3) [Member]
Financial assets:
Certificates of deposit	1,526	1,774
Investment and mortgage backed securities available for sale	7,072	4,211
Loans receivable, net	1,255,642	1,123,436
Mortgage servicing rights	512	412
Financial liabilities:
Deposits	610,374	600,250
Other borrowings	$ 232,085	$ 230,255

Accumulated Other Comprehensi62

Accumulated Other Comprehensive Loss - Activity in Accumulated Other Comprehensive Loss (Detail) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Mar. 31, 2016	Mar. 31, 2015	Mar. 31, 2016	Mar. 31, 2015
Schedule of Available-for-sale Securities [Line Items]
Beginning balance, Accumulated Other Comprehensive Income/(Loss)	$ (4,562)	$ (731)	$ (2,395)	$ (2,579)
Other comprehensive income (loss) before reclassifications	3,287	1,567	1,043	3,375
Amounts reclassified from accumulated other comprehensive loss, net of tax	(162)	(95)	(85)	(55)
Total other comprehensive income (loss)	3,125	1,472	958	3,320
Ending balance, Accumulated Other Comprehensive Income/(Loss)	(1,437)	741	(1,437)	741
Gain on sale of investments	365	204	368	204
Income taxes	726	848	1,292	1,700
Reclassification Out of Accumulated Other Comprehensive Income (Loss) [Member]
Schedule of Available-for-sale Securities [Line Items]
Net of tax	162	95	85	55
Defined Benefit Pension Plan [Member]
Schedule of Available-for-sale Securities [Line Items]
Beginning balance, Accumulated Other Comprehensive Income/(Loss)	(5,246)	(3,188)	(5,325)	(3,228)
Amounts reclassified from accumulated other comprehensive loss, net of tax	79	40	158	80
Total other comprehensive income (loss)	79	40	158	80
Ending balance, Accumulated Other Comprehensive Income/(Loss)	(5,167)	(3,148)	(5,167)	(3,148)
Defined Benefit Pension Plan [Member] \| Reclassification Out of Accumulated Other Comprehensive Income (Loss) [Member]
Schedule of Available-for-sale Securities [Line Items]
Compensation and employee benefits	(119)	(60)	(239)	(121)
Income taxes	40	20	81	41
Net of tax	(79)	(40)	(158)	(80)
Unrealized Gains (Losses) on Securities Available for Sale [Member]
Schedule of Available-for-sale Securities [Line Items]
Beginning balance, Accumulated Other Comprehensive Income/(Loss)	684	2,457	2,930	649
Other comprehensive income (loss) before reclassifications	3,287	1,567	1,043	3,375
Amounts reclassified from accumulated other comprehensive loss, net of tax	(241)	(135)	(243)	(135)
Total other comprehensive income (loss)	3,046	1,432	800	3,240
Ending balance, Accumulated Other Comprehensive Income/(Loss)	3,730	3,889	3,730	3,889
Unrealized Gains (Losses) on Securities Available for Sale [Member] \| Reclassification Out of Accumulated Other Comprehensive Income (Loss) [Member]
Schedule of Available-for-sale Securities [Line Items]
Gain on sale of investments	365	204	368	204
Income taxes	(124)	(69)	(125)	(69)
Net of tax	$ 241	$ 135	$ 243	$ 135

Acquisitions - Additional Infor

Acquisitions - Additional Information (Detail) - Eagle National Bancorp, Inc [Member] $ in Thousands	Dec. 04, 2015USD ($)Branch
Business Acquisition [Line Items]
Date of acquisition	Dec. 4, 2015
Number of branches acquired \| Branch	5
Total purchase price related to acquisition	$ 24,655
Acquired credit impaired loans	3,500
Credit impaired loans, nonaccretable difference amount	2,000
Loan portfolio without evidence of deterioration	120,700
Fair value of loan portfolio	$ 121,400

Acquisitions - Condensed Statem

Acquisitions - Condensed Statement Reflecting Values Assigned to Net Assets (Detail) - USD ($) $ in Thousands	Mar. 31, 2016	Dec. 04, 2015	Sep. 30, 2015
Net assets acquired:
Goodwill resulting from the ENB merger	$ 13,801		$ 10,259
Eagle National Bancorp, Inc [Member]
Business Acquisition [Line Items]
Total purchase price		$ 24,655
Net assets acquired:
Cash		8,481
Investments available for sale		36,275
Loans receivable		123,380
Regulatory stock		889
Premises and equipment, net		945
Intangible assets		1,491
Deferred tax assets		715
Other assets		2,174
Certificates of deposits		(32,408)
Deposits other than certificates of deposits		(119,865)
Other liabilities		(964)
Net Cash acquired		21,113
Goodwill resulting from the ENB merger		$ 3,542

Acquisitions - Pro Forma Select

Acquisitions - Pro Forma Selected Information (Detail) - Eagle National Bancorp, Inc [Member] - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended		4 Months Ended	6 Months Ended
	Mar. 31, 2016	Mar. 31, 2015	Mar. 31, 2016	Mar. 31, 2016	Mar. 31, 2015
Business Acquisition [Line Items]
Net interest income	$ 12,284	$ 12,653	$ 2,123	$ 24,760	$ 25,376
Non interest income	2,278	2,037	166	4,177	3,999
Net	$ 2,128	$ 2,469	$ 575	$ 2,436	$ 4,961
Earnings per share, basic	$ 0.21	$ 0.24		$ 0.24	$ 0.47
Earnings per share, diluted	$ 0.20	$ 0.24		$ 0.23	$ 0.47