ESSA Bancorp (ESSA) 10-K 16 Dec 13 2013 FY Annual report Financial data

Document_and_Entity_Informatio

Document and Entity Information (USD $)	12 Months Ended
	Sep. 30, 2013	Dec. 06, 2013	Mar. 31, 2013
Document And Entity Information [Abstract]	'	'	'
Document Type	'10-K	'	'
Amendment Flag	'false	'	'
Document Period End Date	30-Sep-13	'	'
Document Fiscal Year Focus	'2013	'	'
Document Fiscal Period Focus	'FY	'	'
Entity Registrant Name	'ESSA Bancorp, Inc.	'	'
Entity Central Index Key	'0001382230	'	'
Current Fiscal Year End Date	'--09-30	'	'
Entity Well-known Seasoned Issuer	'No	'	'
Entity Current Reporting Status	'Yes	'	'
Entity Voluntary Filers	'No	'	'
Entity Filer Category	'Accelerated Filer	'	'
Entity Public Float	'	'	$114,120,886
Entity Common Stock, Shares Outstanding	'	11,945,564	'

Consolidated_Balance_Sheet

Consolidated Balance Sheet (USD $)	Sep. 30, 2013	Sep. 30, 2012
In Thousands, unless otherwise specified
ASSETS	'	'
Cash and due from banks	$22,393	$11,034
Interest-bearing deposits with other institutions	4,255	4,516
Total cash and cash equivalents	26,648	15,550
Certificates of deposit	1,767	1,266
Investment securities available for sale, at fair value	315,622	329,585
Loans receivable (net of allowance for loan losses of $8,064 and $7,302)	928,230	950,355
Regulatory stock, at cost	9,415	21,914
Premises and equipment, net	15,747	16,170
Bank-owned life insurance	28,797	27,848
Foreclosed real estate	2,111	2,998
Intangible assets, net	2,466	3,457
Goodwill	8,817	8,541
Deferred income taxes	11,183	11,336
Other assets	21,512	29,766
TOTAL ASSETS	1,372,315	1,418,786
LIABILITIES	'	'
Deposits	1,041,059	995,634
Short-term borrowings	23,000	43,281
Other borrowings	129,260	191,460
Advances by borrowers for taxes and insurance	4,962	3,432
Other liabilities	7,588	9,568
TOTAL LIABILITIES	1,205,869	1,243,375
STOCKHOLDERS' EQUITY	'	'
Preferred stock ($.01 par value; 10,000,000 shares authorized, none issued)	'	'
Common stock ($.01 par value; 40,000,000 shares authorized, 18,133,095 issued; 11,945,564 and 13,229,908 outstanding at September 30, 2013 and 2012, respectively)	181	181
Additional paid-in capital	182,440	181,220
Unallocated common stock held by the Employee Stock Ownership Plan ("ESOP")	-10,532	-10,985
Retained earnings	71,709	65,181
Treasury stock, at cost; 6,187,531 and 4,903,187 shares outstanding at September 30, 2013 and 2012, respectively	-76,117	-61,944
Accumulated other comprehensive income (loss)	-1,235	1,758
TOTAL STOCKHOLDERS' EQUITY	166,446	175,411
TOTAL LIABILITIES AND STOCKHOLDERS' EQUITY	$1,372,315	$1,418,786

Consolidated_Balance_Sheet_Par

Consolidated Balance Sheet (Parenthetical) (USD $)	Sep. 30, 2013	Sep. 30, 2012
In Thousands, except Share data, unless otherwise specified
Statement Of Financial Position [Abstract]	'	'
Allowance for loan losses	$8,064	$7,302
Preferred stock, par value	$0.01	$0.01
Preferred stock, shares authorized	10,000,000	10,000,000
Preferred stock, shares issued	'	'
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	11,945,564	13,229,908
Treasury stock, shares outstanding	6,187,531	4,903,187

Consolidated_Statement_of_Inco

Consolidated Statement of Income (USD $)	12 Months Ended
In Thousands, except Per Share data, unless otherwise specified	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2011
INTEREST INCOME	'	'	'
Loans receivable, including fees	$44,744	$38,384	$38,949
Investment securities:	'	'	'
Taxable	5,958	6,583	7,964
Exempt from federal income tax	272	209	258
Other investment income	128	24	5
Total interest income	51,102	45,200	47,176
INTEREST EXPENSE	'	'	'
Deposits	7,408	7,486	7,486
Short-term borrowings	129	32	46
Other borrowings	3,720	8,614	10,748
Total interest expense	11,257	16,132	18,280
NET INTEREST INCOME	39,845	29,068	28,896
Provision for loan losses	3,750	2,550	2,055
NET INTEREST INCOME AFTER PROVISION FOR LOAN LOSSES	36,095	26,518	26,841
NONINTEREST INCOME	'	'	'
Service fees on deposit accounts	3,133	2,871	3,019
Services charges and fees on loans	1,027	747	639
Trust and investment fees	853	905	851
Gain on sale of investments, net	749	343	778
Gain on sale of loans, net	426	282	3
Earnings on bank-owned life insurance	949	806	638
Insurance commissions	838	748	361
Other	49	33	36
Total noninterest income	8,024	6,735	6,325
NONINTEREST EXPENSE	'	'	'
Compensation and employee benefits	19,002	16,284	15,865
Occupancy and equipment	3,895	3,178	3,071
Professional fees	1,868	1,368	1,488
Data processing	2,907	2,058	1,876
Advertising	574	415	658
Federal Deposit Insurance Corporation ("FDIC") premiums	947	783	763
(Gain) loss on foreclosed real estate	-468	112	35
Merger-related costs	'	1,379	'
Prepayment penalties on borrowings	'	4,644	'
Amortization of intangible assets	991	436	135
Other	2,746	2,348	2,154
Total noninterest expense	32,462	33,005	26,045
Income before income taxes	11,657	248	7,121
Income taxes	2,834	33	1,863
Net income	$8,823	$215	$5,258
Earnings per share:	'	'	'
Basic	$0.76	$0.02	$0.46
Diluted	$0.76	$0.02	$0.46
Dividends per share:	$0.20	$0.20	$0.20

Consolidated_Statement_of_Comp

Consolidated Statement of Comprehensive Income (Loss) (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2011
Amounts Reclassified Out Of Accumulated Other Comprehensive Income Loss [Abstract]	'	'	'
Net income	$8,823	$215	$5,258
Investment securities available for sale:	'	'	'
Unrealized holding gain (loss)	-8,550	1,163	3,549
Tax effect	2,907	-396	-1,207
Reclassification of gains recognized in net income	-749	-343	-778
Tax effect	255	117	264
Net of tax amount	-6,137	541	1,828
Pension plan adjustment:	'	'	'
Related to actuarial losses and prior service cost	4,763	956	-1,045
Tax effect	-1,619	-325	355
Net of tax amount	3,144	631	-690
Total other comprehensive gain (loss)	-2,993	1,172	1,138
Comprehensive income	$5,830	$1,387	$6,396

Consolidated_Statement_of_Chan

Consolidated Statement of Changes in Stockholders' Equity (USD $)	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 Income (Loss) [Member]
In Thousands, except Share data
Beginning Balance at Sep. 30, 2010	$171,623	$170	$164,494	($11,891)	$64,272	($44,870)	($552)
Beginning Balance, Shares at Sep. 30, 2010	'	13,482,612	'	'	'	'	'
Net income	5,258	'	'	'	5,258	'	'
Unrealized gain (loss) on securities available for sale, net of income taxes of $942, $279 and $3161 in 2011, 2012 and 2013, respectively	1,828	'	'	'	'	'	1,828
Change in unrecognized pension cost, net of income tax benefit of $355, $325 and $1620 in 2011, 2012 and 2013, respectively	-690	'	'	'	'	'	-690
Cash dividends declared ($.20 per share)	-2,315	'	'	'	-2,315	'	'
Stock-based compensation	2,162	'	2,162	'	'	'	'
Allocation of ESOP stock	555	'	102	453	'	'	'
Treasury shares purchased	-16,742	'	'	'	'	-16,742	'
Treasury shares purchased, Shares	'	-1,372,990	'	'	'	'	'
Ending Balance at Sep. 30, 2011	161,679	170	166,758	-11,438	67,215	-61,612	586
Ending Balance, Shares at Sep. 30, 2011	'	12,109,622	'	'	'	'	'
Net income	215	'	'	'	215	'	'
Unrealized gain (loss) on securities available for sale, net of income taxes of $942, $279 and $3161 in 2011, 2012 and 2013, respectively	541	'	'	'	'	'	541
Change in unrecognized pension cost, net of income tax benefit of $355, $325 and $1620 in 2011, 2012 and 2013, respectively	631	'	'	'	'	'	631
Cash dividends declared ($.20 per share)	-2,249	'	'	'	-2,249	'	'
Stock-based compensation	2,151	'	2,151	'	'	'	'
Allocation of ESOP stock	469	'	16	453	'	'	'
Treasury shares purchased	-332	'	'	'	'	-332	'
Treasury shares purchased, Shares	'	-31,909	'	'	'	'	'
First Star Bank acquisition	12,306	11	12,295	'	'	'	'
First Star Bank acquisition, Shares	'	1,152,195	'	'	'	'	'
Ending Balance at Sep. 30, 2012	175,411	181	181,220	-10,985	65,181	-61,944	1,758
Ending Balance, Shares at Sep. 30, 2012	13,229,908	13,229,908	'	'	'	'	'
Net income	8,823	'	'	'	8,823	'	'
Unrealized gain (loss) on securities available for sale, net of income taxes of $942, $279 and $3161 in 2011, 2012 and 2013, respectively	-6,137	'	'	'	'	'	-6,137
Change in unrecognized pension cost, net of income tax benefit of $355, $325 and $1620 in 2011, 2012 and 2013, respectively	3,144	'	'	'	'	'	3,144
Cash dividends declared ($.20 per share)	-2,295	'	'	'	-2,295	'	'
Stock-based compensation	1,516	'	1,516	'	'	'	'
Allocation of ESOP stock	485	'	32	453	'	'	'
Allocation of treasury shares to incentive plan	'	'	-328	'	'	328	'
Treasury shares purchased	-14,501	'	'	'	'	-14,501	'
Treasury shares purchased, Shares	'	-1,284,344	'	'	'	'	'
Ending Balance at Sep. 30, 2013	$166,446	$181	$182,440	($10,532)	$71,709	($76,117)	($1,235)
Ending Balance, Shares at Sep. 30, 2013	11,945,564	11,945,564	'	'	'	'	'

Consolidated_Statement_of_Chan1

Consolidated Statement of Changes in Stockholders' Equity (Parenthetical) (USD $)	12 Months Ended
In Thousands, except Per Share data, unless otherwise specified	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2011
Unrealized gain (loss) on securities available for sale, tax	$3,161	$279	$942
Change in unrecognized pension cost, tax	1,620	325	355
Cash dividends declared, per share	$0.20	$0.20	$0.20
Retained Earnings [Member]	'	'	'
Cash dividends declared, per share	$0.20	$0.20	$0.20
Accumulated Other Comprehensive Income (Loss) [Member]	'	'	'
Unrealized gain (loss) on securities available for sale, tax	3,161	279	942
Change in unrecognized pension cost, tax	$1,620	$325	$355

Consolidated_Statement_of_Cash

Consolidated Statement of Cash Flows (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2011
OPERATING ACTIVITIES	'	'	'
Net income	$8,823	$215	$5,258
Adjustments to reconcile net income to net cash provided by operating activities:	'	'	'
Provision for loan losses	3,750	2,550	2,055
Provision for depreciation and amortization	1,145	986	1,082
Amortization and accretion of discounts and premiums, net	1,504	1,567	1,195
Net gain on sale of investment securities	-749	-343	-778
Gain on sale of loans, net	-426	-282	-3
Origination of mortgage loans sold	-19,530	-7,966	-97
Proceeds from sale of mortgage loans originated for sale	19,956	8,248	100
Compensation expense from ESOP	485	469	555
Stock-based compensation	1,516	2,151	2,162
Decrease in accrued interest receivable	544	73	199
Decrease in accrued interest payable	-295	-836	-161
Earnings on bank-owned life insurance	-949	-806	-638
Deferred federal income taxes	1,188	1,825	-274
(Increase) decrease in prepaid FDIC insurance premiums	1,934	-1,340	699
Increase in accrued pension liability	4,587	379	419
(Gain) loss on foreclosed real estate	-468	112	35
Amortization of identifiable intangible assets	991	436	135
Other, net	-812	-2,111	-1,755
Net cash provided by operating activities	23,194	5,327	10,188
INVESTING ACTIVITIES	'	'	'
Purchase of certificates of deposit	-501	-1,250	'
Investment securities available for sale:	'	'	'
Proceeds from sale of investment securities	39,212	44,844	18,856
Proceeds from principal repayments and maturities	95,919	72,667	93,711
Purchases	-131,264	-91,967	-96,814
Investment securities held to maturity:	'	'	'
Proceeds from sale of investment securities	'	'	5,787
Proceeds from principal repayments and maturities	'	'	2,523
Purchases	'	'	-2,001
Decrease (increase) in loans receivable, net	16,719	-4,353	-13,276
Redemption of FHLB stock	13,795	3,793	3,845
Purchase of FHLB Stock	-1,296	'	'
Purchase of bank-owned life insurance	'	-8	-7,000
Investment in limited partnership	-327	-4,951	-2,441
Proceeds from sale of foreclosed real estate	3,150	2,354	3,318
Capital improvements to foreclosed real estate	-96	-30	-46
Purchase of insurance subsidiary	'	'	-2,025
Investment in insurance subsidiary	-276	-374	'
Acquisition, net of cash acquired	'	55,472	'
Purchase of premises, equipment, and software	-806	-799	-353
Net cash provided by investing activities	34,229	75,398	4,084
FINANCING ACTIVITIES	'	'	'
Increase in deposits, net	51,422	12,044	97,514
Net increase (decrease) in short-term borrowings	-20,281	39,281	-10,719
Proceeds from other borrowings	27,800	23,150	38,300
Repayment of other borrowings	-90,000	-177,338	-89,247
Increase (decrease) in advances by borrowers for taxes and insurance	1,530	-1,425	-84
Purchase of treasury stock shares	-14,501	-332	-16,917
Dividends on common stock	-2,295	-2,249	-2,315
Net cash (used for) provided by financing activities	-46,325	-106,869	16,532
Increase (decrease) in cash and cash equivalents	11,098	-26,144	30,804
CASH AND CASH EQUIVALENTS AT BEGINNING OF YEAR	15,550	41,694	10,890
CASH AND CASH EQUIVALENTS AT END OF YEAR	26,648	15,550	41,694
Cash paid:	'	'	'
Interest	11,552	16,489	18,441
Income taxes	662	300	2,475
Noncash items:	'	'	'
Transfers from loans to foreclosed real estate	1,699	2,685	3,349
Treasury stock payable	'	'	-175
Transfers from held-to-maturity investments to available-for-sale investments	'	'	-6,442
Brokered certificate purchase not settled	'	5,597	'
Acquisition of insurance company:	'	'	'
Cash paid	'	'	-2,025
Acquisition of First Star Bancorp, Inc.	'	'	'
Cash paid	'	24,611	'
Noncash assets acquired:	'	'	'
Investments available for sale	'	110,140	'
Certificates of deposit	'	16	'
Loans receivable	'	212,617	'
Regulatory stock	'	8,825	'
Premises and equipment	'	4,881	'
Bank-owned life insurance	'	3,778	'
Foreclosed real estate	'	393	'
Accrued interest receivable	'	1,059	'
Intangible assets	'	2,068	1,960
Goodwill	'	8,127	40
Deferred tax assets	'	11,760	'
Other assets	'	1,702	'
Total noncash assets	'	365,366	2,000
Liabilities assumed:	'	'	'
Certificates of deposit	'	221,442	'
Deposits other than certificates of deposit	'	118,627	'
Borrowings	'	61,238	'
Advances by borrowers for taxes and insurance	'	3,476	'
Accrued interest payable	'	479	'
Other liabilities	'	3,270	'
Total noncash liabilities	'	408,532	'
Net noncash assets acquired	'	-43,166	2,000
Cash acquired	'	$67,777	'

Summary_of_Significant_Account

Summary of Significant Accounting Policies	12 Months Ended
	Sep. 30, 2013
Accounting Policies [Abstract]	'
Summary of Significant Accounting Policies	'
	1	SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES
	A summary of significant accounting and reporting policies applied in the presentation of the accompanying financial statements follows:
	Nature of Operations and Basis of Presentation
	The consolidated financial statements include the accounts of ESSA Bancorp, Inc. (the “Company”), its wholly owned subsidiary, ESSA Bank & Trust (the “Bank”), and the Bank’s wholly owned subsidiaries, ESSACOR Inc.; Pocono Investments Company; ESSA Advisory Services, LLC; Integrated Financial Corporation; and Integrated Abstract Incorporated, a wholly owned subsidiary of Integrated Financial Corporation. The primary purpose of the Company is to act as a holding company for the Bank. The Company is subject to regulation and supervision as a savings and loan holding company by the Federal Reserve Board. The Bank is a Pennsylvania-chartered savings association located in Stroudsburg, Pennsylvania. The Bank’s primary business consists of the taking of deposits and granting of loans to customers generally in Monroe, Northampton, and Lehigh counties, Pennsylvania. The Bank is subject to regulation and supervision by the Pennsylvania Banking Department 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. Integrated Abstract Incorporated is a Pennsylvania Corporation that provides title insurance services. All significant intercompany accounts and transactions have been eliminated in consolidation.
	Use of Estimates in the Preparation of Financial Statements
	The accounting principles followed by the Company and its subsidiary and the methods of applying these principles conform to U.S. generally accepted accounting principles and to general practice within the banking industry. In preparing the consolidated financial statements, the Company is required to make estimates and assumptions that affect the reported amounts of assets and liabilities as of the Consolidated Balance Sheet date and related revenues and expenses for the period. Actual results could differ significantly from those estimates.
	Securities
	The Company determines the appropriate classification of debt securities at the time of purchase and reevaluates such designation as of each balance sheet date.
	Securities classified as available for sale are those securities that the Company intends to hold for an indefinite period of time but not necessarily to maturity. Any decision to sell a security classified as available for sale would be based on various factors, including significant movement in interest rates, changes in maturity mix of the Company’s assets and liabilities, liquidity needs, regulatory capital considerations, and other similar factors.
	Securities available for sale are carried at fair value. Unrealized gains and losses are reported in other comprehensive income, net of the related deferred tax effects. Realized gains or losses, determined on the basis of the cost of the specific securities sold, are included in earnings. Premiums and discounts are recognized in interest income using the interest method over the period to maturity.
	Declines in the fair value of available-for-sale securities below their cost that are deemed to be other than temporary are reflected in earnings as realized losses. In estimating other-than-temporary impairment losses, the Company considers: (1) the length of time and the extent to which the fair value has been less than cost; (2) the financial condition and near-term prospects of the issuer; and (3) the Company’s intent to sell the security or whether its more likely than not that the Company would be required to sell the security before its anticipated recovery in market value.
	Loans Receivable
	Loans receivable that the Company has the intent and ability to hold for the foreseeable future or until maturity or payoff are stated at their outstanding unpaid principal balances, net of an allowance for loan losses and any deferred fees and costs. Interest income is accrued on the unpaid principal balance. Loan origination fees, net of certain direct origination costs, are deferred and recognized as an adjustment of the yield (interest income) of the related loans. The Company is generally amortizing these amounts over the contractual life of the loan. Mortgage loans sold in the secondary market are sold without recourse.
	The accrual of interest is generally discontinued when the contractual payment of principal or interest has become 90 days past due or the Company has serious doubts about further collectibility of principal or interest, even though the loan is currently performing. A loan may remain on accrual status if it is in the process of collection and is either guaranteed or well secured. When a loan is placed on nonaccrual status, unpaid interest credited to income is reversed. Interest received on nonaccrual loans generally is either applied against principal or reported as interest income, according to the Company’s judgment as to the collectibility of principal. Generally, loans are restored to accrual status when the obligation is brought current and has performed in accordance with the contractual terms for a reasonable period of time and the ultimate collectibility of the total contractual principal and interest is no longer in doubt.
	Loans Held for Sale
	Loans originated and intended for sale in the secondary market are carried at the lower of cost or estimated fair value in the aggregate. Net unrealized losses, if any, are recognized through a valuation allowance by charges to income. All sales are made without recourse.
	Loans Acquired
	Loans acquired including loans that have evidence of deterioration of credit quality since origination and for which it is probable, at acquisition, that the Company will be unable to collect all contractually required payments receivable, are initially recorded at fair value (as determined by the present value of expected future cash flows) with no valuation allowance. Loans are evaluated individually to determine if there is evidence of deterioration of credit quality since origination. The difference between the undiscounted cash flows expected at acquisition and the investment in the loan, or the “accretable yield,” is recognized as interest income on a level-yield method over the life of the loan. Contractually required payments for interest and principal that exceed the undiscounted cash flows expected at acquisition, or the “non-accretable difference,” are not recognized as a yield adjustment or as a loss accrual or a valuation allowance. Increases in expected cash flows subsequent to the initial investment are recognized prospectively through adjustment of the yield on the loan over its remaining estimated life. Decreases in expected cash flows are recognized immediately as impairment. Any valuation allowances on these impaired loans reflect only losses incurred after acquisition.
	For purchased loans acquired that are not deemed impaired at acquisition, credit discounts representing the principal losses expected over the life of the loan are a component of the initial fair value. Loans may be aggregated and accounted for as a pool of loans if the loans being aggregated have common risk characteristics. Subsequent to the purchase date, the methods utilized to estimate the required allowance for credit losses for these loans is similar to originated loans; however, the Company records a provision for loan losses only when the required allowance exceeds any remaining credit discounts. The remaining differences between the purchase price and the unpaid principal balance at the date of acquisition are recorded in interest income over the life of the loans.
	Allowance for Loan Losses
	The allowance for loan losses is established through provisions for loan losses charged against income. Loans deemed to be uncollectible are charged against the allowance for loan losses, and subsequent recoveries, if any, are credited to the allowance.
	The allowance for loan losses is maintained at a level by management which represents the evaluation of known and inherent risks in the loan portfolio at the consolidated balance sheet date. Management’s periodic evaluation of the adequacy of the allowance is based on the Company’s past loan loss experience, known and inherent risks in the portfolio, adverse situations that may affect the borrower’s ability to repay, the estimated value of any underlying collateral, composition of the loan portfolio, current economic conditions, and other relevant factors. This evaluation is inherently subjective, since it requires material estimates that may be susceptible to significant change, including the amounts and timing of future cash flows expected to be received on impaired loans.
	The allowance consists of specific and general components. The specific component relates to loans that are classified as impaired. For such loans an allowance is established when the discounted cash flows (or collateral value or observable market price) of the impaired loan is lower than the carrying value of that loan. The general component covers nonclassified loans and is based on historical loss experience adjusted for qualitative factors.
	A loan is considered impaired when, based on current information and events, it is probable that the Company will be unable to collect the scheduled payments of principal or interest when due according to the contractual terms of the loan agreement and all loan types are considered impaired if the loan is restructured in a troubled debt restructuring. Factors considered by management in determining impairment include payment status, collateral value, and the probability of collecting scheduled principal and interest payments when due. Loans that experience insignificant payment delays and payment shortfalls generally are not classified as impaired. Management determines the significance of payment delays and payment shortfalls on a case-by-case basis, taking into consideration all of the circumstances surrounding the loan and the borrower, including the length of the delay, the reasons for the delay, the borrower’s prior payment record, and the amount of the shortfall in relation to the principal and interest owed. Impairment is measured on a loan-by-loan basis for commercial and construction loans by the present value of expected future cash flows discounted at the loan’s effective interest rate, the loan’s obtainable market price, or the fair value of the collateral if the loan is collateral-dependent.
	Large groups of smaller balance homogeneous loans are collectively evaluated for impairment. Accordingly, the Company does not separately identify individual consumer and residential mortgage loans for impairment disclosures.
	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 a period of performance.
	Federal Home Loan Bank Stock
	The Company is a member of the Federal Home Loan Bank System and holds stock in the Federal Home Loan Bank (“FHLB”) of Pittsburgh. As a member, the Company maintains an investment in the capital stock of the FHLB of Pittsburgh in an amount not less than 35 basis points of the outstanding member asset value plus 4.6 percent of its outstanding FHLB borrowings, as calculated throughout the year. The equity security is accounted for at cost and classified separately on the Consolidated Balance Sheet. The stock is bought from and sold to the FHLB based upon its $100 par value. The stock does not have a readily determinable fair value and as such is classified as restricted stock, carried at cost and evaluated by management. The stock’s value is determined by the ultimate recoverability of the par value rather than by recognizing temporary declines. The determination of whether the par value will ultimately be recovered is influenced by criteria such as the following: (a) The significance of the decline in net assets of the FHLB as compared to the capital stock amount and the length of time this situation has persisted (b) Commitments by the FHLB to make payments required by law or regulation and the level of such payments in relation to the operating performance (c) The impact of legislative and regulatory changes on the customer base of the FHLB and (d) The liquidity position of the FHLB.
	While the FHLB have been negatively impacted by the current economic conditions, the FHLB of Pittsburgh has reported profits for 2012, remains in compliance with regulatory capital and liquidity requirements, and continues to make redemptions at the par value. With consideration given these factors, management concluded that the stock was not impaired at September 30, 2013.
	Loan Servicing
	Servicing assets are recognized as separate assets when rights are acquired through purchase or through sale of financial assets. Capitalized servicing rights are reported in other assets and are amortized into noninterest income in proportion to, and over the period of, the estimated future net servicing income of the underlying financial assets. Servicing assets are evaluated for impairment based upon a third-party appraisal. Fair value is determined using prices for similar assets with similar characteristics, when available, or based upon discounted cash flows using market-based assumptions. Impairment is recognized through a valuation allowance to the extent that fair value is less than the capitalized amount. The Company’s loan servicing assets at September 30, 2013 and 2012, were not impaired. Total servicing assets included in other assets as of September 30, 2013 and 2012, were $382,000 and $365,000, respectively.
	Premises and Equipment
	Land is carried at cost. Premises and equipment are stated at cost less accumulated depreciation. Depreciation is calculated using the straight-line method over the useful lives of the related assets, which range from 10 to 40 years for buildings, land improvements, and leasehold improvements and 3 to 7 years for furniture, fixtures, and equipment. Expenditures for maintenance and repairs are charged to operations as incurred. Costs of major additions and improvements are capitalized.
	Bank-Owned Life Insurance (“BOLI”)
	The Company owns insurance on the lives of a certain group of key employees. The policies were purchased to help offset the increase in the costs of various fringe benefit plans, including healthcare. The cash surrender value of these policies is included as an asset on the Consolidated Balance Sheet, and any increase in cash surrender value is recorded as noninterest income on the Consolidated Statement of Income. In the event of the death of an insured individual under these policies, the Company would receive a death benefit which would be recorded as noninterest income.
	Foreclosed Real Estate
	Real estate owned acquired in settlement of foreclosed loans is carried at fair value minus estimated costs to sell. At acquisition of real estate acquired in settlement of foreclosed loans, the excess of the remaining loan balance over the asset’s estimated fair value less cost to sell is charged off against the allowance for loan losses. Subsequent declines in the asset’s value are recognized as noninterest expense in the consolidated statement of income. Operating expenses of such properties, net of related income, are expensed in the period incurred.
	Goodwill and Intangible Assets
	Goodwill is not amortized, but it is tested at least annually for impairment, in the fourth quarter or more frequently if indicators of impairment are present. If the estimated current fair value of a reporting unit exceeds its carrying value, no additional testing is required and an impairment loss is not recorded. The Company uses market capitalization and multiples of tangible book value methods to determine the estimated current fair value of its reporting unit. Based on this analysis, no impairment was recorded in 2013 or 2012.
	The other intangibles assets are assigned useful lives, which are amortized on an accelerated basis over their weighted-average lives. The Company periodically reviews the intangible asset for impairment as events or changes in circumstances indicate that the carrying amount of such asset may not be recoverable.
	The following tables provide information for the carrying amount of goodwill and intangible assets.
	Goodwill		2013			2012
	Balance at beginning of year		$	8,541		$	40
	Goodwill acquired			276			8,501
	Balance at end of year		$	8,817		$	8,541
	Intangible assets		2013			2012
	Balance at beginning of year		$	3,457		$	1,825
	Intangible assets acquired			—			2,068
	Amortization			(991	)		(436	)
	Balance at end of year		$	2,466		$	3,457
	Amortizable intangible assets were composed of the following:
						September 30,
						2013			2012
			Gross Carrying			Accumulated
			Amount			Amortization
			(dollars in thousands)
	Customer data		$	2,408		$	694		$	283
	Employment obligations			1,620			868			288
			$	4,028		$	1,562		$	571
			2013			2012
	Aggregate amortization expense:
	For the years ended September 30		$	991		$	436
Estimated amortization expense:
2014		$	870,000
2015			477,000
2016			382,000
2017			267,000
2018			180,000
2019			81,000
2020			81,000
2021			78,000
2022			50,000
		$	2,466,000
Employee Benefit Plans
The Bank maintains a noncontributory, defined benefit pension plan for all employees who have met age and length of service requirements. The Bank’s funding policy is to contribute annually up to the maximum amount that can be deducted for federal income tax purposes. The Bank also maintains a defined contribution Section 401(k) plan covering eligible employees. The Company created an ESOP for the benefit of employees who meet certain eligibility requirements. The Company makes cash contributions to the ESOP on an annual basis.
The Company maintains an equity incentive plan to provide for issuance or granting of shares of common stock for stock options or restricted stock. The Company has recorded stock-based employee compensation cost using the fair value method as allowed under generally accepted accounting principles. Management estimated the fair values of all option grants using the Black-Scholes option-pricing model. Management estimated the expected life of the options using the simplified method as allowed under generally accepted accounting principles. The risk-free rate was determined utilizing the treasury yield for the expected life of the option contract.
Advertising Costs
In accordance with generally accepted accounting principles, the Company expenses all advertising expenditures incurred.
Transfers of Financial Assets
Transfers of financial assets are accounted for as sales when control over the assets has been surrendered. Control over transferred assets is deemed to be surrendered when (1) the assets have been isolated from the Company; (2) the transferee obtains the right (free of conditions that constrain it from taking advantage of that right) to pledge or exchange the transferred assets; and (3) the Company does not maintain effective control over the transferred assets through an agreement to repurchase them before their maturity.
Income Taxes
Deferred tax assets and liabilities are reflected based on the differences between the financial statement and the income tax basis of assets and liabilities using the enacted marginal tax rates. Deferred income tax expense and benefit are based on the changes in the deferred tax assets or liabilities from period to period. Deferred tax assets and liabilities are reflected at currently enacted income tax rates applicable to the period in which such items are expected to be realized or settled. As changes in tax rates are enacted, deferred tax assets and liabilities are adjusted through the provision for income taxes. The Company files a consolidated federal income tax return and individual state income tax returns.
The Company prescribes a recognition threshold and a measurement attribute for the financial statement recognition and measurement of a tax position taken or expected to be taken in a tax return. Benefits from tax positions should be recognized in the financial statements only when it is more likely than not that the tax position will be sustained upon examination by the appropriate taxing authority that would have full knowledge of all relevant information. A tax position that meets the more-likely-than-not recognition threshold is measured at the largest amount of benefit that is greater than 50 percent likely of being realized upon ultimate settlement. Tax positions that previously failed to meet the more-likely-than-not recognition threshold should be recognized in the first subsequent financial reporting period in which that threshold is met. Previously recognized tax positions that no longer meet the more-likely-than-not recognition threshold should be derecognized in the first subsequent financial reporting period in which that threshold is no longer met. Accounting literature also provides guidance on the accounting for and disclosure of unrecognized tax benefits, interest, and penalties. In accordance with generally accepted accounting principles, interest or penalties incurred for income taxes will be recorded as a component of other expenses.
Cash and Cash Equivalents
The Company has defined cash and cash equivalents as cash and due from banks and interest-bearing deposits with other institutions with original maturities of less than 90 days.
Earnings Per Share
The Company provides dual presentation of basic and diluted earnings per share. Basic earnings per share are calculated utilizing net income as reported as the numerator and average shares outstanding as the denominator. The computation of diluted earnings per share differs in that the dilutive effects of any options are adjusted for in the denominator.
Comprehensive Income (Loss)
The Company is required to present comprehensive income (loss) and its components in a full set of general-purpose financial statements for all periods presented. Other comprehensive income (loss) is composed of net unrealized holding gains or losses on its available-for-sale investment and mortgage-backed securities portfolio, as well as changes in unrecognized pension cost.
The components of accumulated other comprehensive income (loss), net of tax, as of year-end were as follows:
		2013			2012			2011
Net unrealized gain on securities available for sale		$	71		$	6,208		$	5,667
Net unrecognized pension cost			(1,306	)		(4,450	)		(5,081	)
Total		$	(1,235	)	$	1,758		$	586
Fair Value Measurements
We group our assets at fair value in three levels, based on the markets in which the assets are traded and the reliability of the assumptions used to determine fair value. These levels are:
	•		Level I – Valuation is based upon quoted prices for identical instruments traded in active markets.
	•		Level II – Valuation is based upon quoted prices for similar instruments in active markets, quoted prices for identical or similar instruments in markets that are not active, and model-based valuation techniques for which all significant assumptions are observable in the market.
	•		Level III – Valuation is generated from model-based techniques that use significant assumptions not observable in the market. These unobservable assumptions reflect the Company’s own estimates of assumptions that market participants would use in pricing the asset.
We base our fair values on the price that would be received to sell an asset or paid to transfer a liability in an orderly transaction between market participants at the measurement date. It is our policy to maximize the use of observable inputs and minimize the use of unobservable inputs when developing fair value measurements, in accordance with the fair value hierarchy in generally accepted accounting principles.
Fair value measurements for most of our assets are obtained from independent pricing services that we have engaged for this purpose. When available, we, or our independent pricing service, use quoted market prices to measure fair value. If market prices are not available, fair value measurement is based upon models that incorporate available trade, bid, and other market information. Subsequently, all of our financial instruments use either of the foregoing methodologies to determine fair value adjustments recorded to our financial statements. In certain cases, however, when market observable inputs for model-based valuation techniques may not be readily available, we are required to make judgments about assumptions market participants would use in estimating the fair value of financial instruments. The degree of management judgment involved in determining the fair value of financial instrument is dependent upon the availability of quoted market prices or observable market parameters. For financial instruments that trade actively and have quoted market prices or observable market parameters, there is minimal subjectivity involved in measuring fair value. When observable market prices and parameters are not fully available, management judgment is necessary to estimate fair value. In addition, changes in the market conditions may reduce the availability of quoted prices or observable data. When market data is not available, we use valuation techniques requiring more management judgment to estimate the appropriate fair value measurement. Therefore, the results cannot be determined with precision and may not be realized in an actual sale or immediate settlement of the asset. Additionally, there may be inherent weaknesses in any calculation technique, and changes in the underlying assumptions used, including discount rates and estimates of future cash flows, that could significantly affect the results of current or future valuations.
Reclassification of Comparative Amounts
Certain items previously reported have been reclassified to conform to the current year’s reporting format. Such reclassifications did not affect consolidated net income or consolidated stockholders’ equity.
Recent Accounting Pronouncements
In December 2011, the FASB issued ASU 2011-11, Balance Sheet (Topic 210): Disclosures about Offsetting Assets and Liabilities. The amendments in this Update affect all entities that have financial instruments and derivative instruments that are either (1) offset in accordance with either Section 210-20-45 or Section 815-10-45 or (2) subject to an enforceable master netting arrangement or similar agreement. The requirements amend the disclosure requirements on offsetting in Section 210-20-50. This information will enable users of an entity’s financial statements to evaluate the effect or potential effect of netting arrangements on an entity’s financial position, including the effect or potential effect of rights of setoff associated with certain financial instruments and derivative instruments in the scope of this Update. An entity is required to apply the amendments for annual reporting periods beginning on or after January 1, 2013, and interim periods within those annual periods. An entity should provide the disclosures required by those amendments retrospectively for all comparative periods presented. This Update is not expected to have a significant impact on the Company’s financial statements.
In October 2012, the FASB issued ASU 2012-06, Business Combinations (Topic 805): Subsequent Accounting for an Indemnification Asset Recognized at the Acquisition Date as a Result of a Government-Assisted Acquisition of a Financial Institution. Update 2012-06 requires that when a reporting entity recognizes an indemnification asset (in accordance with Subtopic 805-20) as a result of a government-assisted acquisition of a financial institution and subsequently a change in the cash flows expected to be collected on the indemnification asset occurs (as a result of a change in cash flows expected to be collected on the assets subject to indemnification), the reporting entity should subsequently account for the change in the measurement of the indemnification asset on the same basis as the change in the assets subject to indemnification. Any amortization of changes in value should be limited to the contractual term of the indemnification agreement (that is, the lesser of the term of the indemnification agreement and the remaining life of the indemnified assets). Update 2012-06 is effective for fiscal years, and interim periods within those years, beginning on or after December 15, 2012. Early adoption is permitted. The amendments should be applied prospectively to any new indemnification assets acquired after the date of adoption and to indemnification assets existing as of the date of adoption arising from a government-assisted acquisition of a financial institution. This Update is not expected to have a significant impact on the Company’s financial statements.
In January 2013, the FASB issued ASU 2013-01, Balance Sheet (Topic 210): Clarifying the Scope of Disclosures about Offsetting Assets and Liabilities. The amendments clarify that the scope of Update 2011-11 applies to derivatives accounted for in accordance with Topic 815, Derivatives and Hedging, including bifurcated embedded derivatives, repurchase agreements and reverse repurchase agreements, and securities borrowing and securities lending transactions that are either offset in accordance with Section 210-20-45 or Section 815-10-45 or subject to an enforceable master netting arrangement or similar agreement. An entity is required to apply the amendments for fiscal years beginning on or after January 1, 2013, and interim periods within those annual periods. An entity should provide the required disclosures retrospectively for all comparative periods presented. The effective date is the same as the effective date of Update 2011-11. This Update is not expected to have a significant impact on the Company’s financial statements.
In February 2013, the FASB issued ASU 2013-04, Obligations Resulting from Joint and Several Liability Arrangements for Which the Total Amount of the Obligation Is Fixed at the Reporting Date. The Update requires the measurement of obligations resulting from joint and several liability arrangements for which the total amount of the obligation is fixed at the reporting date as the sum of the amount the reporting entity agreed to pay on the basis of its arrangement with its co-obligors as well as any additional amount that the entity expects to pay on behalf of its co-obligors. The new standard is effective retrospectively for fiscal years and interim periods within those years, beginning after December 15, 2013, and early adoption is permitted. This Update is not expected to have a significant impact on the Company’s financial statements.
In April 2013, the FASB issued ASU 2013-07, Presentation of Financial Statements (Topic 205): Liquidation Basis of Accounting. The amendments in this Update are being issued to clarify when an entity should apply the liquidation basis of accounting. In addition, the guidance provides principles for the recognition and measurement of assets and liabilities and requirements for financial statements prepared using the liquidation basis of accounting. The amendments require an entity to prepare its financial statements using the liquidation basis of accounting when liquidation is imminent. Liquidation is imminent when the likelihood is remote that the entity will return from liquidation and either (a) a plan for liquidation is approved by the person or persons with the authority to make such a plan effective and the likelihood is remote that the execution of the plan will be blocked by other parties or (b) a plan for liquidation is being imposed by other forces (for example, involuntary bankruptcy). If a plan for liquidation was specified in the entity’s governing documents from the entity’s inception (for example, limited-life entities), the entity should apply the liquidation basis of accounting only if the approved plan for liquidation differs from the plan for liquidation that was specified at the entity’s inception. The amendments are effective for entities that determine liquidation is imminent during annual reporting periods beginning after December 15, 2013, and interim reporting periods therein. Entities should apply the requirements prospectively from the day that liquidation becomes imminent. Early adoption is permitted. Entities that use the liquidation basis of accounting as of the effective date in accordance with other Topics (for example, terminating employee benefit plans) are not required to apply the amendments. Instead, those entities should continue to apply the guidance in those other Topics until they have completed liquidation. This Update is not expected to have a significant impact on the Company’s financial statements.
In June 2013, the FASB issued ASU 2013-08, Financial Services – Investment Companies (Topic 946): Amendments to the Scope, Measurement, and Disclosure Requirements. The amendments in this Update affect the scope, measurement, and disclosure requirements for investment companies under U.S. GAAP. The amendments do all of the following: 1. Change the approach to the investment company assessment in Topic 946, clarify the characteristics of an investment company, and provide comprehensive guidance for assessing whether an entity is an investment company. 2. Require an investment company to measure noncontrolling ownership interests in other investment companies at fair value rather than using the equity method of accounting. 3. Require the following additional disclosures: (a) the fact that the entity is an investment company and is applying the guidance in Topic 946, (b) information about changes, if any, in an entity’s status as an investment company, and (c) information about financial support provided or contractually required to be provided by an investment company to any of its investees. The amendments in this Update are effective for an entity’s interim and annual reporting periods in fiscal years that begin after December 15, 2013. Earlier application is prohibited. This Update is not expected to have a significant impact on the Company’s financial statements.
In July 2013, the FASB issued ASU 2013-09, Fair Value Measurement (Topic 820): Deferral of the Effective Date of Certain Disclosures for Nonpublic Employee Benefit Plans in Update 2011-04. The amendments in this Update apply to certain quantitative disclosure requirements for an employee benefit plan, other than those plans that are subject to the Securities and Exchange Commission’s filing requirements (hereafter “nonpublic employee benefit plan”), that holds investments in its plan sponsor’s own nonpublic entity equity securities, including equity securities of its plan sponsor’s nonpublic affiliated entities and that are within the scope of the disclosure requirements contained in FASB Accounting Standards Update 2011-04, Fair Value Measurement (Topic 820): Amendments to Achieve Common Fair Value Measurement and Disclosure Requirements in U.S. GAAP and IFRSs. The amendments in this Update defer indefinitely the effective date of certain required disclosures in Update 2011-04 (Topic 820) of quantitative information about the significant unobservable inputs used in Level 3 fair value measurements for investments held by a nonpublic employee benefit plan in its plan sponsor’s own nonpublic entity equity securities, including equity securities of its plan sponsor’s nonpublic affiliated entities. The amendments in this Update do not defer the effective date for those certain quantitative disclosures for other nonpublic entity equity securities held in the nonpublic employee benefit plan or any qualitative disclosures. The deferral in this amendment is effective upon issuance for financial statements that have not been issued. This Update did not have a significant impact on the Company’s financial statements.
In July 2013, the FASB issued ASU 2013-10, Derivatives and Hedging (Topic 815): Inclusion of the Fed Funds Effective Swap Rate (or Overnight Index Swap Rate) as a Benchmark Interest Rate for Hedge Accounting Purposes. The amendments in this Update permit the Fed Funds Effective Swap Rate (OIS) to be used as a U.S. benchmark interest rate for hedge accounting purposes under Topic 815, in addition to UST and LIBOR. The amendments also remove the restriction on using different benchmark rates for similar hedges. The amendments are effective prospectively for qualifying new or redesignated hedging relationships entered into on or after July 17, 2013. This Update did not have a significant impact on the Company’s financial statements.
In July 2013, the FASB issued ASU 2013-11, Income Taxes (Topic 740): Presentation of an Unrecognized Tax Benefit When a Net Operating Loss Carryforward, a Similar Tax Loss, or a Tax Credit Carryforward Exists. This Update applies to all entities that have unrecognized tax benefits when a net operating loss carryforward, a similar tax loss, or a tax credit carryforward exists at the reporting date. An unrecognized tax benefit, or a portion of an unrecognized tax benefit, should be presented in the financial statements as a reduction to a deferred tax asset for a net operating loss carryforward, a similar tax loss, or a tax credit carryforward, except as follows. To the extent a net operating loss carryforward, a similar tax loss, or a tax credit carryforward is not available at the reporting date under the tax law of the applicable jurisdiction to settle any additional income taxes that would result from the disallowance of a tax position or the tax law of the applicable jurisdiction does not require the entity to use, and the entity does not intend to use, the deferred tax asset for such purpose, the unrecognized tax benefit should be presented in the financial statements as a liability and should not be combined with deferred tax assets. The assessment of whether a deferred tax asset is available is based on the unrecognized tax benefit and deferred tax asset that exist at the reporting date and should be made presuming disallowance of the tax position at the reporting date. The amendments in this Update are effective for fiscal years, and interim periods within those years, beginning after December 15, 2013. For nonpublic entities, the amendments are effective for fiscal years, and interim periods within those years, beginning after December 15, 2014. Early adoption is permitted. The amendments should be applied prospectively to all unrecognized tax benefits that exist at the effective date. Retrospective application is permitted. This Update is not expected to have a significant impact on the Company’s financial statements.

Earnings_Per_Share

Earnings Per Share	12 Months Ended
	Sep. 30, 2013
Earnings Per Share [Abstract]	'
Earnings Per Share	'
	2	EARNINGS PER SHARE
	The following table sets forth the composition of the weighted-average common shares (denominator) used in the basic and diluted earnings per share computation for the years ended September 30, 2013, 2012, and 2011.
			2013			2012			2011
	Weighted-average common shares outstanding			18,133,094			17,172,932			16,980,900
	Average treasury stock shares			(5,475,194	)		(4,882,611	)		(4,089,417	)
	Average unearned ESOP shares			(1,063,720	)		(1,109,012	)		(1,154,272	)
	Average unearned nonvested shares			(34,627	)		(130,626	)		(249,296	)
	Weighted-average common shares and common stock equivalents used to calculate basic earnings per share			11,559,553			11,050,683			11,487,915
	Additional common stock equivalents (nonvested stock) used to calculate diluted earnings per share			—			—			—
	Additional common stock equivalents (stock options) used to calculate diluted earnings per share			—			—			—
	Weighted-average common shares and common stock equivalents used to calculate diluted earnings per share			11,559,553			11,050,683			11,487,915
	At September 30, 2013, there were 19,998 shares of nonvested stock outstanding at a price of $10.94 per share and options to purchase 1,458,379 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. At September 30, 2012, there were 76,716 shares of nonvested stock outstanding at a price of $12.35 per share and options to purchase 1,458,379 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. At September 30, 2011, there were 195,262 shares of nonvested stock outstanding at a price of $12.35 per share and options to purchase 1,458,379 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.

Investment_Securities

Investment Securities	12 Months Ended
	Sep. 30, 2013
Investments Debt And Equity Securities [Abstract]	'
Investment Securities	'
	3	INVESTMENT SECURITIES
	The amortized cost and fair value of investment securities available for sale are summarized as follows (in thousands):
			2013
					Gross		Gross
			Amortized		Unrealized		Unrealized			Fair
			Cost		Gains		Losses			Value
	Available for sale
	Fannie Mae		$	114,927	$	1,691	$	(1,595	)	$	115,023
	Freddie Mac			60,111		838		(1,252	)		59,697
	Governmental National Mortgage Association securities			39,692		289		(230	)		39,751
	Other mortgage-backed securities			3,385		—		(19	)		3,366
	Total mortgage-backed securities			218,115		2,818		(3,096	)		217,837
	Obligations of states and political subdivisions			23,754		654		(499	)		23,909
	U.S. government agency securities			52,775		225		(480	)		52,520
	Corporate obligations			12,756		186		(169	)		12,773
	Trust-preferred securities			4,943		471		—			5,414
	Other debt securities			1,147		7		—			1,154
	Total debt securities			313,490		4,361		(4,244	)		313,607
	Equity securities—financial services			2,025		—		(10	)		2,015
	Total		$	315,515	$	4,361	$	(4,254	)	$	315,622
			2012
					Gross		Gross
			Amortized		Unrealized		Unrealized			Fair
			Cost		Gains		Losses			Value
	Available for sale
	Fannie Mae		$	111,145	$	4,652	$	(3	)	$	115,794
	Freddie Mac			48,913		1,952		(11	)		50,854
	Governmental National Mortgage Association securities			43,164		803		(16	)		43,951
	Other mortgage-backed securities			5,043		162		—			5,205
	Total mortgage-backed securities			208,265		7,569		(30	)		215,804
	Obligations of states and political subdivisions			18,611		906		—			19,517
	U.S. government agency securities			74,106		379		(1	)		74,484
	Corporate obligations			8,602		146		(91	)		8,657
	Trust-preferred securities			5,852		382		(1	)		6,233
	Other debt securities			1,476		36		—			1,512
	Total debt securities			316,912		9,418		(123	)		326,207
	Equity securities—financial services			3,267		111		—			3,378
	Total		$	320,179	$	9,529	$	(123	)	$	329,585
	The amortized cost and fair value of debt securities at September 30, 2013, 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		Fair
			Cost		Value
	Due in one year or less		$	3,026	$	3,044
	Due after one year through five years			41,889		42,147
	Due after five years through ten years			65,780		65,847
	Due after ten years			202,795		202,569
	Total		$	313,490	$	313,607
	For the years ended September 30, 2013, 2012, and 2011, the Company realized gross gains of $766,000, $343,000, and $792,000, and gross losses of $17,000, $0, and $14,000, respectively, and proceeds from the sale of investment securities of $39,212,000, $44,844,000, and $24,643,000, respectively.
	Investment securities with carrying values of $50,162,000 and $22,832,000 at September 30, 2013 and 2012, respectively, were pledged to secure public deposits and other purposes as required by law. Securities sold under agreements to repurchase and other borrowings are secured by U.S. government agency and mortgage-backed securities with a carrying value of $14,795,000 and $56,947,000 at September 30, 2013 and 2012, respectively.

Unrealized_Losses_on_Securitie

Unrealized Losses on Securities	12 Months Ended
	Sep. 30, 2013
Text Block [Abstract]	'
Unrealized Losses on Securities	'
	4	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 (in thousands):
			2013
					Less than Twelve Months					Twelve Months or Greater					Total
			Number				Gross					Gross					Gross
			of		Fair		Unrealized			Fair		Unrealized			Fair		Unrealized
			Securities		Value		Losses			Value		Losses			Value		Losses
	Fannie Mae			30	$	47,814	$	(1,589	)	$	1,057	$	(6	)	$	48,871	$	(1,595	)
	Freddie Mac			20		32,781		(1,252	)		—		—			32,781		(1,252	)
	Governmental National Mortgage Association securities			6		10,301		(230	)		—		—			10,301		(230	)
	Other mortgage-backed securities			3		3,366		(19	)		—		—			3,366		(19	)
	Obligations of states and political subdivisions			7		8,064		(499	)		—		—			8,064		(499	)
	U.S. government agency securities			10		30,084		(479	)		999		(1	)		31,083		(480	)
	Corporate obligations			5		5,042		(169	)		—		—			5,042		(169	)
	Equity securities			1		1,990		(10	)		—		—			1,990		(10	)
	Total			82	$	139,442	$	(4,247	)	$	2,056	$	(7	)	$	141,498	$	(4,254	)
			2012
					Less than Twelve Months					Twelve Months or Greater					Total
			Number				Gross					Gross					Gross
			of		Fair		Unrealized			Fair		Unrealized			Fair		Unrealized
			Securities		Value		Losses			Value		Losses			Value		Losses
	Fannie Mae			3	$	4,083	$	(3	)	$	—	$	—		$	4,083	$	(3	)
	Freddie Mac			1		2,002		(11	)		—		—			2,002		(11	)
	Governmental National Mortgage Association securities			5		6,090		(16	)		—		—			6,090		(16	)
	U.S. government agency securities			1		999		(1	)		—		—			999		(1	)
	Corporate obligations			5		1,059		(25	)		1,434		(66	)		2,493		(91	)
	Trust-preferred securities			1		998		(1	)		—		—			998		(1	)
	Total			16	$	15,231	$	(57	)	$	1,434	$	(66	)	$	16,665	$	(123	)
	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, corporate obligations, and debt obligations of a U.S. state or political subdivision.
	The Company reviews its position quarterly and has asserted that at September 30, 2013 and 2012, the declines outlined in the above table represent temporary declines and the Company would not be required to sell the security before its anticipated recovery in market value.
	The Company has concluded that any impairment of its investment securities portfolio at September 30, 2013, is not other than temporary but is the result of interest rate changes that are not expected to result in the noncollection of principal and interest during the period. The Company has concluded that any impairment of its investment securities portfolio at September 30, 2013 and 2012, is not other than temporary but is the result of interest rate changes that are not expected to result in the noncollection of principal and interest during the period.

Loans_Receivable

Loans Receivable	12 Months Ended
	Sep. 30, 2013
Receivables [Abstract]	'
Loans Receivable	'
	5	LOANS RECEIVABLE
	Loans receivable consist of the following (in thousands):
			2013			2012
	Real estate loans:
	Residential		$	686,651		$	696,696
	Construction			2,288			3,805
	Commercial			159,469			160,192
	Commercial			10,125			12,818
	Obligations of states and political subdivisions			33,445			33,736
	Home equity loans and lines of credit			41,923			47,925
	Other			2,393			2,485
				936,294			957,657
	Less allowance for loan losses			8,064			7,302
	Net loans		$	928,230		$	950,355
	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. There were no material increases or decreases in the expected cash flows of these loans between July 31, 2012 (the “acquisition date”) and September 30, 2013. The fair value of purchased credit-impaired loans, on the acquisition date, was determined, primarily based on the fair value of loan collateral. The carrying value of purchased loans acquired with deteriorated credit quality was $7.1 million at September 30, 2013.
	On the acquisition date, the preliminary estimate of the unpaid principal balance for all loans evidencing credit impairment acquired in the First Star Bank acquisition was $12.9 million and the estimated fair value of the loans was $7.3 million. Total contractually required payments on these loans, including interest, at the acquisition date was $13.9 million. However, the Company’s preliminary estimate of expected cash flows was $8.8 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 $5.1 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 $1.4 million 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, was determined by projecting discounted contractual cash flows. The table below presents the components of the purchase accounting adjustments related to the purchased impaired loans acquired in the First Star acquisition as of July 31, 2012 (in thousands):
	Unpaid principal balance		$	12,922
	Interest			968
	Contractual cash flows			13,890
	Non-accretable discount			(5,137	)
	Expected cash flows			8,753
	Accretable discount			(1,432	)
	Estimated fair value		$	7,321
	Changes in the accretable yield for purchased credit-impaired loans were as follows, since acquisition, for the periods ended September 30, 2013 and 2012.
	Balance at beginning of period		$	1,098		$	1,432
	Accretion			(1,098	)		(334	)
	Balance at end of period		$	—		$	1,098
	The following table presents additional information regarding loans acquired and accounted for in accordance with ASC 310-30 (in thousands):
			September 30, 2013			September 30, 2012
			Acquired Loans with Specific			Acquired Loans with Specific
			Evidence or Deterioration in			Evidence or Deterioration in
			Credit Quality (ASC 310-30)			Credit Quality (ASC 310-30)
	Outstanding balance		$	9,371		$	12,527
	Carrying amount			7,131			7,500
	There has been no allowance for loan losses recorded for acquired loans with or without specific evidence of deterioration in credit quality as of July 31, 2012 or September 30, 2013. In addition, no allowance for loan losses had to be reversed.
	Loans serviced by the Company for others amounted to $80,986,000 and $82,263,000 at September 30, 2013 and 2012, respectively.
	The Company’s primary business activity is with customers located within its local trade area. Commercial, residential, and consumer loans are granted. The Company also funds commercial and residential loans originated outside its immediate trade area provided such loans meet the Company’s credit policy guidelines. Although the Company has a diversified loan portfolio at September 30, 2013 and 2012, loans outstanding to individuals and businesses are dependent upon the local economic conditions in its immediate trade area.
	At September 30, 2013, 2012, and 2011, the Company had nonaccrual loans of $23,279,000, $23,707,000, and $10,971,000, respectively. Additional interest income that would have been recorded under the original terms of the loan agreements amounted to $883,000, $592,000, and $615,000, for the years ended September 30, 2013, 2012, and 2011, respectively.
	Impaired loans for the year ended September 30 are summarized as follows (in thousands):
			2013			2012			2011
	Impaired loans with a related allowance		$	6,160		$	4,368		$	5,630
	Impaired loans without a related allowance			31,066			29,103			12,589
	Related allowance for loan losses			819			952			1,160
	Average recorded balance of impaired loans			37,386			22,393			10,718
	Interest income recognized			860			649			109
	The following table shows the amount of loans in each category that were individually and collectively evaluated for impairment at the dates indicated (in thousands):
									Loans			Collectively
						Individually			Acquired with			Evalauated
			Total			Evaluated			Deteriorated			for
			Loans			for Impairment			Credit Quality			Impairment
	September 30, 2013
	Real estate loans:
	Residential		$	686,651		$	14,018		$	271		$	672,362
	Construction			2,288			—			—			2,288
	Commercial			159,469			15,478			6,355			137,636
	Commercial			10,125			220			502			9,403
	Obligations of states and political subdivisions			33,445			—			—			33,445
	Home equity loans and lines of credit			41,923			379			3			41,541
	Other			2,393			—			—			2,393
	Total		$	936,294		$	30,095		$	7,131		$	899,068
									Loans			Collectively
					Individually			Acquired with			Evalauated
		Total			Evaluated			Deteriorated			for
		Loans			for Impairment			Credit Quality			Impairment
September 30, 2012
Real estate loans:
Residential		$	696,696		$	7,942		$	271		$	688,483
Construction			3,805			—			—			3,805
Commercial			160,192			17,415			6,159			136,618
Commercial			12,818			423			1,007			11,388
Obligations of states and political subdivisions			33,736			—			—			33,736
Home equity loans and lines of credit			47,925			191			44			47,690
Other			2,485			—			19			2,466
Total		$	957,657		$	25,971		$	7,500		$	924,186
The Company maintains a loan review system, which allows for a periodic review of our loan portfolio and the early identification of potential impaired loans. Such system takes into consideration, among other things, delinquency status, size of loans, type and market value of collateral, and financial condition of the borrowers. Specific loan loss allowances are established for identified losses based on a review of such information. A loan evaluated for impairment is considered to be impaired when, based on current information and events, it is probable that the Company will be unable to collect all amounts due according to the contractual terms of the loan agreement. All loans identified as impaired are evaluated independently. The Company does not aggregate such loans for evaluation purposes. Impairment is measured on a loan-by-loan basis for commercial and construction loans by the present value of expected future cash flows discounted at the loan’s effective interest rate, the loan’s obtainable market price, or the fair value of the collateral if the loan is collateral-dependent.
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 a period of performance.
The following table includes the recorded investment and unpaid principal balances for impaired loans with the associated allowance amount, if applicable. Also presented are the average recorded investments in the impaired loans and the related amount of interest recognized during the time within the period that the impaired loans were impaired (in thousands).
					Unpaid						Average			Interest
		Recorded			Principal			Associated			Recorded			Income
		Investment			Balance			Allowance			Investment			Recognized
September 30, 2013
With no specific allowance recorded:
Real estate loans:
Residential		$	11,251		$	11,245		$	—		$	9,716		$	159
Construction			—			—			—			—			—
Commercial			18,711			18,723			—			20,751			615
Commercial			722			722			—			1,034			9
Obligations of states and political subdivisions			—			—			—			—			—
Home equity loans and lines of credit			382			382			—			373			3
Other			—			—			—			18			—
Subtotal			31,066			31,072			—			31,892			786
With an allowance recorded:
Real estate loans:
Residential			3,038			3,041			518			2,655			74
Construction			—			—			—			—			—
Commercial			3,122			3,123			301			2,839			—
Commercial			—			—			—			—			—
Obligations of states and political subdivisions			—			—			—			—			—
Home equity loans and lines of credit			—			—			—			—			—
Other			—			—			—			—			—
Subtotal			6,160			6,164			819			5,494			74
Total:
Real estate loans:
Residential			14,289			14,286			518			12,371			233
Construction			—			—			—			—			—
Commercial			21,833			21,846			301			23,590			615
Commercial			722			722			—			1,034			9
Obligations of states and political subdivisions			—			—			—			—			—
Home equity loans and lines of credit			382			382			—			373			3
Other			—			—			—			18			—
Total		$	37,226		$	37,236		$	819		$	37,386		$	860
					Unpaid						Average			Interest
		Recorded			Principal			Associated			Recorded			Income
		Investment			Balance			Allowance			Investment			Recognized
September 30, 2012
With no specific allowance recorded:
Real estate loans:
Residential		$	5,182		$	5,177		$	—		$	4,687		$	82
Construction			—			—			—			—			—
Commercial			22,290			22,341			—			13,584			457
Commercial			1,386			1,385			—			581			28
Obligations of states and political subdivisions			—			—			—			—			—
Home equity loans and lines of credit			226			226			—			238			—
Other			19			19			—			25			—
Subtotal			29,103			29,148			—			19,115			567
With an allowance recorded:
Real estate loans:
Residential			3,031			3,030			661			1,892			68
Construction			—			—			—			—			—
Commercial			1,284			1,286			270			1,326			13
Commercial			44			44			12			47			—
Obligations of states and political subdivisions			—			—			—			—			—
Home equity loans and lines of credit			9			9			9			13			1
Other			—			—			—			—			—
Subtotal			4,368			4,369			952			3,278			82
Total:
Real estate loans:
Residential			8,213			8,207			661			6,579			150
Construction			—			—			—			—			—
Commercial			23,574			23,627			270			14,910			470
Commercial			1,430			1,429			12			628			28
Obligations of states and political subdivisions			—			—			—			—			—
Home equity loans and lines of credit			235			235			9			251			1
Other			19			19			—			25			—
Total		$	33,471		$	33,517		$	952		$	22,393		$	649
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 currently protected but are potentially weak, resulting in an undue and unwarranted credit risk, but not to the point of justifying a Substandard classification. 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. The portion of any loan that represents a specific allocation of the allowance for loan losses is placed in the Doubtful category. Any portion of a loan that has been charged off is placed in the Loss category.
To help ensure that risk ratings are accurate and reflect the present and future capacity of borrowers to repay a loan as agreed, the Comapany has a structured loan rating process with several layers of internal and external oversight. Generally, consumer and residential mortgage loans are included in the Pass categories unless a specific action, such as bankruptcy, repossession, or death, occurs to raise awareness of a possible credit event. The Company’s Commercial Loan Officers are responsible for the timely and accurate risk rating of the loans in their portfolios at origination and on an ongoing basis. The Company’s Commercial Loan Officers perform an annual review of all commercial relationships $250,000 or greater. Confirmation of the appropriate risk grade is included in the review on an ongoing basis. The Company engages an external consultant to conduct loan reviews on at least a semiannual basis. Generally, the external consultant reviews commercial relationships greater than $500,000 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 table presents the classes of the loan portfolio summarized by the aggregate Pass and the criticized categories of Special Mention, Substandard, and Doubtful within the internal risk rating system as of September 30, 2013 and 2012 (in thousands):
					Special
		Pass			Mention			Substandard			Doubtful			Total
September 30, 2013
Commercial real estate loans		$	129,799		$	9,440		$	20,230		$	—		$	159,469
Commercial			9,466			436			223			—			10,125
Obligations of states and political subdivisions			33,445			—			—			—			33,445
Total		$	172,710		$	9,876		$	20,453		$	—		$	203,039
					Special
		Pass			Mention			Substandard			Doubtful			Total
September 30, 2012
Commercial real estate loans		$	132,841		$	5,502		$	21,849		$	—		$	160,192
Commercial			12,035			360			423			—			12,818
Obligations of states and political subdivisions			33,736			—			—			—			33,736
Total		$	178,612		$	5,862		$	22,272		$	—		$	206,746
All other loans are underwritten and structured using standardized criteria and characteristics, primarily payment performance, and are normally risk rated and monitored collectively on a monthly basis. These are typically loans to individuals in the consumer categories and are delineated as either performing or nonperforming.
For residential real estate loans, construction real estate loans, home equity loans and lines of credit, and other loans, the Company evaluates credit quality based on the performance of the individual credits. The following table presents the recorded investment in the loan classes based on payment activity as of September 30, 2013 and September 30, 2012 (in thousands):
		Performing			Nonperforming			Total
September 30, 2013
Real estate loans:
Residential		$	675,706		$	10,945		$	686,651
Construction			2,288			—			2,288
Home equity loans and lines of credit			41,584			339			41,923
Other			2,393			—			2,393
Total		$	721,971		$	11,284		$	733,255
		Performing			Nonperforming			Total
September 30, 2012
Real estate loans:
Residential		$	686,160		$	10,536		$	696,696
Construction			3,805			—			3,805
Home equity loans and lines of credit			47,552			373			47,925
Other			2,466			19			2,485
Total		$	739,983		$	10,928		$	750,911
The Company further monitors the performance and credit quality of the loan portfolio by analyzing the age of the portfolio as determined by the length of time a recorded payment is past due. The following table presents the classes of the loan portfolio summarized by the aging categories of performing loans and nonaccrual loans as of September 30, 2013 and 2012 (in thousands):
					31-60			61-90			Greater than
					Days			Days			90 Days			Non		Total			Total
		Current			Past Due			Past Due			Past Due			Accrual		Past Due			Loans
September 30, 2013
Real estate loans:
Residential		$	671,850		$	2,866		$	990		$	—		$	10,945	$	14,801		$	686,651
Construction			2,288			—			—			—			—		—			2,288
Commercial			146,062			2,589			—			—			10,818		13,407			159,469
Commercial			8,948			—			—			—			1,177		1,177			10,125
Obligations of states and political subdivisions			33,445			—			—			—			—		—			33,445
Home equity loans and lines of credit			41,380			127			77			—			339		543			41,923
Other			2,336			57			—			—			—		57			2,393
Total		$	906,309		$	5,639		$	1,067		$	—		$	23,279	$	29,985		$	936,294
					31-60			61-90			Greater than
					Days			Days			90 Days			Non		Total			Total
		Current			Past Due			Past Due			Past Due			Accrual		Past Due			Loans
September 30, 2012
Real estate loans:
Residential		$	681,222		$	3,664		$	1,274		$	—		$	10,536	$	15,474		$	696,696
Construction			3,805			—			—			—			—		—			3,805
Commercial			142,277			3,658			3,348			—			10,909		17,915			160,192
Commercial			10,948			—			—			—			1,870		1,870			12,818
Obligations of states and political subdivisions			33,736			—			—			—			—		—			33,736
Home equity loans and lines of credit			46,967			447			138			—			373		958			47,925
Other			2,452			14			—			—			19		33			2,485
Total		$	921,407		$	7,783		$	4,760		$	—		$	23,707	$	36,250		$	957,657
The allowance for loan losses (“ALL”) is maintained at a level necessary to absorb loan losses that are both probable and reasonably estimable. Management, in determining the allowance for loan losses, considers the losses inherent in its loan portfolio and changes in the nature and volume of loan activities, along with the general economic and real estate market conditions. The allowance for loan losses consists of two elements: (1) an allocated allowance, which comprises allowances established on specific loans and class allowances based on historical loss experience and current trends, 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 September 30, 2013, is maintained at a level that represents management’s best estimate of losses inherent in the loan portfolio, and such losses were both probable and reasonably estimable.
In addition, the FDIC and the Pennsylvania Department of Banking, as an integral part of their examination process, have periodically reviewed the Company’s allowance for loan losses. The banking regulators may require that the Company recognize additions to the allowance based on their analysis and review of information available to it at the time of their examination.
Management reviews the loan portfolio on a quarterly basis using a defined, consistently applied process in order to make appropriate and timely adjustments to the ALL. When information confirms all or part of specific loans to be uncollectible, these amounts are promptly charged-off against the ALL.
The following table summarizes the primary segments of the ALL, segregated into the amount required for loans individually evaluated for impairment and the amount required for loans collectively evaluated for impairment as of September 30, 2013 (in thousands):
		Real												Obligations of		Home Equity
		Estate												States and		Loans and
		Loans												Political		Lines of
		Residential			Construction			Commercial			Commercial			Subdivisions		Credit			Other			Unallocated			Total
ALL balance at September 30, 2011		$	5,220		$	8		$	1,255		$	500		$	74	$	622		$	80		$	411		$	8,170
Charge-offs			(2,366	)		—			(987	)		(31	)		—		(393	)		—			—			(3,777	)
Recoveries			291			—			7			26			—		35			—			—			359
Provision			2,256			21			424			(21	)		53		235			(58	)		(360	)		2,550
ALL balance at September 30, 2012		$	5,401		$	29		$	699		$	474		$	127	$	499		$	22		$	51		$	7,302
September 30, 2012		$	5,401		$	29		$	699		$	474		$	127	$	499		$	22		$	51		$	7,302
Charge-offs			(2,401	)		—			(403	)		—			—		(243	)		(6	)		—			(3,053	)
Recoveries			50			—			2			—			—		13			—			—			65
Provision			2,737			(9	)		648			(137	)		3		161			5			342			3,750
ALL balance at September 30, 2013		$	5,787		$	20		$	946		$	337		$	130	$	430		$	21		$	393		$	8,064
Individually evaluated for impairment		$	518		$	—		$	301		$	—		$	—	$	—		$	—		$	—		$	819
Collectively evaluated for impairment			5,269			20			645			337			130		430			21			393			7,245
ALL balance at September 30, 2013		$	5,787		$	20		$	946		$	337		$	130	$	430		$	21		$	393		$	8,064
Individually evaluated for impairment		$	661		$	—		$	270		$	12		$	—	$	9		$	—		$	—		$	952
Collectively evaluated for impairment			4,740			29			429			462			127		490			22			51			6,350
ALL balance at September 30, 2012		$	5,401		$	29		$	699		$	474		$	127	$	499		$	22		$	51		$	7,302
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 the residential real estate, commercial and home equity loans, and lines of credit segments for the year ended September 30, 2013, due to increased charge-off activity in those segments. The Company allocated decreased allowance for loan loss provisions to the commercial real estate segment due to actual loss experience being less than previously estimated. 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 restructurings granted during the periods indicated (in thousands).
		For the Year Ended September 30, 2013
					Pre-Modification			Post-Modification
					Outstanding			Outstanding
		Number of			Recorded			Recorded
		Contracts			Investment			Investment
Troubled debt restructurings
Real estate loans:
Residential			12		$	1,578		$	1,578
Construction			—			—			—
Commercial			—			—			—
Commercial			—			—			—
Obligations of states and political subdivisions
Home equity loans and lines of credit			1			98			98
Other			—			—			—
Total			13		$	1,676		$	1,676
		For the Year Ended September 30, 2012
					Pre-Modification			Post-Modification
					Outstanding			Outstanding
		Number of			Recorded			Recorded
		Contracts			Investment			Investment
Troubled debt restructurings
Real estate loans:
Residential			20		$	3,365		$	3,281
Construction			—			—			—
Commercial			10			3,165			3,102
Commercial			3			217			162
Obligations of states and political subdivisions
Home equity loans and lines of credit			2			5			4
Other			—			—			—
Total			35		$	6,752		$	6,549
During 2013, there were no new loans identified as troubled debt restructurings, nor were there any loan modifications classified as troubled debt restructurings that subsequently defaulted.
The following is a summary of troubled debt restructurings that have subsequently defaulted within one year of modification (in thousands).
		For the Year Ended September 30, 2012
		Number of			Recorded
		Contracts			Investment
Troubled debt restructurings
Real estate loans:
Residential			—		$	—
Construction			—			—
Commercial			1			41
Commercial			1			31
Obligations of states and political subdivisions
Home equity loans and lines of credit			—			—
Other			—			—
Total			2		$	72

Premises_and_Equipment

Premises and Equipment	12 Months Ended
	Sep. 30, 2013
Property Plant And Equipment [Abstract]	'
Premises and Equipment	'
	6	PREMISES AND EQUIPMENT
	Premises and equipment consist of the following (in thousands):
			2013			2012
	Land and land improvements		$	5,930		$	5,001
	Buildings and leasehold improvements			14,102			14,772
	Furniture, fixtures, and equipment			9,549			9,003
	Construction in process			15			234
				29,596			29,010
	Less accumulated depreciation			(13,849	)		(12,840	)
	Total		$	15,747		$	16,170
	Depreciation expense amounted to $1,009,000, $885,000, and $920,000, for the years ended September 30, 2013, 2012, and 2011, respectively.

Deposits

Deposits	12 Months Ended
	Sep. 30, 2013
Banking And Thrift [Abstract]	'
Deposits	'
	7	DEPOSITS
	Deposits and their respective weighted-average interest rates consist of the following major classifications (in thousands):
			2013					2012
			Weighted-					Weighted-
			Average					Average
			Interest Rate			Amount		Interest Rate			Amount
	Noninterest-bearing demand accounts			—	%	$	58,795		—	%	$	41,767
	NOW accounts			0.04			99,857		0.05			109,923
	Money market accounts			0.2			138,049		0.3			155,666
	Savings and club accounts			0.05			110,189		0.06			102,143
	Certificates of deposit			1.26			634,169		1.46			586,135
	Total			0.8	%	$	1,041,059		0.92	%	$	995,634
			2013					2012
			Weighted-					Weighted-
			Average					Average
			Interest Rate			Amount		Interest Rate			Amount
	Certificates of deposit:
	0.00 - 2.00%			0.84	%	$	496,310		0.93	%	$	423,426
	2.01 - 4.00%			2.71			133,579		2.72			150,692
	4.01 - 6.00%			4.55			4,280		4.46			12,017
	Total			1.26	%	$	634,169		1.46	%	$	586,135
	At September 30 scheduled maturities of certificates of deposit are as follows (in thousands):
	Within three months		$	129,805
	Three through six months			97,656
	Six through twelve months			84,691
	Over twelve months			322,017
	Total		$	634,169
	Brokered deposits totaled $233,315,000 and $156,823,000 at September 30, 2013 and 2012, respectively. The aggregate amount of certificates of deposit with a minimum denomination of $100,000 were $443,863,000 at September 30, 2013.
	The scheduled maturities of certificates of deposit in denominations of $100,000 or more as of September 30, 2013, are as follows (in thousands):
	Within three months		$	82,817
	Three through six months			71,392
	Six through twelve months			43,247
	Over twelve months			246,407
	Total		$	443,863
	A summary of interest expense on deposits for the years ended September 30 is as follows (in thousands):
			2013			2012		2011
	NOW accounts		$	51		$	24	$	25
	Money market accounts			327			326		551
	Savings and club accounts			51			80		156
	Certificates of deposits			6,979			7,056		6,754
	Total		$	7,408		$	7,486	$	7,486

ShortTerm_Borrowings

Short-Term Borrowings	12 Months Ended
	Sep. 30, 2013
Debt Disclosure [Abstract]	'
Short-Term Borrowings	'
	8	SHORT-TERM BORROWINGS
	As of September 30, 2013 and 2012, the Company had $23,000,000 and $43,281,000 of short-term borrowings, respectively, of which $20,281,000 in 2012 were advances on a $75,000,000 line of credit with the FHLB. There were no advances on the line of credit in 2013.
	All borrowings from the FHLB are secured by a blanket lien on qualified collateral, defined principally as investment securities and mortgage loans that are owned by the Company free and clear of any liens or encumbrances. At September 30, 2013, the Company had a borrowing limit of approximately $599 million, with a variable rate of interest, based on the FHLB’s cost of funds.
	The following table sets forth information concerning short-term borrowings (in thousands):
			2013			2012			2011
	Balance at year-end		$	23,000		$	43,281		$	4,000
	Maximum amount outstanding at any month-end			84,500			43,281			28,086
	Average balance outstanding during the year			45,792			11,712			6,439
	Weighted-average interest rate:
	As of year-end			0.29	%		0.3	%		0.22	%
	Paid during the year			0.28	%		0.27	%		0.71	%
	Average balances outstanding during the year represent daily average balances, and average interest rates represent interest expenses divided by the related average balance.

Other_Borrowings

Other Borrowings	12 Months Ended
	Sep. 30, 2013
Debt Disclosure [Abstract]	'
Other Borrowings	'
	9	OTHER BORROWINGS
	The following table presents contractual maturities of FHLB long-term advances and securities sold under agreements to repurchase (in thousands):
								Weighted-			Stated Interest
			Maturity Range					Average			Rate Ranged
	Description		From		To			Interest Rate			From			To			2013		2012
	Convertible			12/5/18		12/5/18			3.3	%		3.3	%		3.3	%	$	5,000	$	5,000
	Fixed rate			11/19/13		9/21/20			1.9			0.63			4.1			107,260		133,960
	Mid-term			5/12/14		3/4/16			0.71			0.46			0.87			7,000		7,500
	Securities sold under agreements to repurchase			1/12/14		4/6/14			2.75			2.63			2.86			10,000		45,000
	Total																$	129,260	$	191,460
	Maturities of FHLB long-term advances and securities sold under agreements to repurchase are summarized as follows (in thousands):
	Year Ending				Weighted-
	September 30,		Amount		Average Rate
	2014		$	33,710		2.74	%
	2015			10,300		2.26
	2016			28,300		1.41
	2017			23,250		1.41
	2018			20,000		1.64
	2019 and thereafter			13,700		2.3
	Total		$	129,260		1.95	%
	Included above is one convertible note for $5,000,000 which is convertible to a variable-rate advance on specific dates at the discretion of the FHLB. Should the FHLB convert this advance, the Bank has the option of accepting the variable rate or repaying the advance without penalty.
	The FHLB long-term advances are secured by qualifying assets of the Bank, which include the FHLB stock, securities, and first-mortgage loans.
	Included in other borrowings are sales of securities under repurchase agreements. Repurchase agreements are treated as financings with the obligations to repurchase securities sold reflected as a liability in the balance sheet. The dollar amount of securities underlying the agreements remains recorded as an asset, although the securities underlying the agreements are delivered to the brokers who arranged the transactions.
	Securities sold under agreements to repurchase and other borrowings are secured by U.S. government mortgage-backed securities with a carrying value of $14,795,000 and $56,947,000 at September 30, 2013 and 2012, respectively.

Income_Taxes

Income Taxes	12 Months Ended
	Sep. 30, 2013
Income Tax Disclosure [Abstract]	'
Income Taxes	'
	10	INCOME TAXES
	The provision for income taxes consists of (in thousands):
			2013			2012			2011
	Current:
	Federal		$	1,646		$	(1,807	)	$	2,130
	State			—			15			7
	Total current taxes			1,646			(1,792	)		2,137
	Deferred income tax benefit			1,188			1,825			(274	)
	Total income tax provision		$	2,834		$	33		$	1,863
	Total
	The tax effects of deductible and taxable temporary differences that gave rise to significant portions of the deferred tax assets and deferred tax liabilities are as follows (in thousands):
			2013			2012
	Deferred tax assets:
	Allowance for loan losses		$	2,742		$	2,515
	Charitable contributions carryover			—			12
	Employee benefit plan			673			2,292
	Investment losses subject to Section 382 limitation			5,622			5,895
	Purchase accounting adjustment			789			2,287
	Other			4,232			3,447
	Total gross deferred tax assets			14,058			16,448
	Deferred tax liabilities:
	Pension plan			1,137			1,197
	Net unrealized gain on securities			36			3,198
	Mortgage servicing rights			131			125
	Premises and equipment			462			175
	Other			601			417
	Total gross deferred tax liabilities			2,367			5,112
	Net deferred tax assets		$	11,691		$	11,336
	The Company establishes a valuation allowance for deferred tax assets when management believes that the deferred tax assets are not likely to be realized either through a carryback to taxable income in prior years, future reversals of existing taxable temporary differences, and, to a lesser extent, future taxable income. The tax deduction generated by the contribution to the ESSA Bank & Trust Foundation exceeded the allowable federal income tax deduction limitations, resulting in the establishment of a valuation allowance in the amount of $0 at September 30, 2012. At September 30, 2013, this tax deduction and the corresponding allowance were both $0 due to the expiration of the carry forward for the deduction.
	Accounting principles prescribe a recognition threshold and a measurement attribute for the financial statement recognition and measurement of a tax position taken or expected to be taken in a tax return. Benefits from tax positions should be recognized in the financial statements only when it is more likely than not that the tax position will be sustained upon examination by the appropriate taxing authority that would have full knowledge of all relevant information. A tax position that meets the more-likely-than-not recognition threshold is measured at the largest amount of benefit that is greater than 50 percent likely of being realized upon ultimate settlement. Tax positions that previously failed to meet the more-likely-than-not recognition threshold should be recognized in the first subsequent financial reporting period in which that threshold is met. Previously recognized tax positions that no longer meet the more-likely-than-not recognition threshold should be derecognized in the first subsequent financial reporting period in which that threshold is no longer met.
	There is currently no liability for uncertain tax positions and no known unrecognized tax benefits. The Company recognizes, when applicable, interest and penalties related to unrecognized tax benefits in the provision for income taxes in the Statement of Income. The Company’s federal and state income tax returns for taxable years through 2008 have been closed for purposes of examination by the Internal Revenue Service and the Pennsylvania Department of Revenue.
	The reconciliation of the federal statutory rate and the Company’s effective income tax rate is as follows (in thousands):
			2013						2012						2011
			Amount			% of			Amount			% of			Amount			% of
						Pretax						Pretax						Pretax
						Income						Income						Income
	Provision at statutory rate		$	3,963			34	%	$	84			34	%	$	2,421			34	%
	Valuation allowance			—			—			247			99.6			39			0.5
	Income from bank-owned life insurance			(322	)		(2.8	)		(274	)		(110.7	)		(217	)		(3.0	)
	Tax-exempt income			(388	)		(3.3	)		(310	)		(125.5	)		(371	)		(5.2	)
	Low-income housing credits			(289	)		(2.5	)		(195	)		(78.7	)		(175	)		(2.5	)
	Nondeductible merger expenses			—			—			163			65.8			—			—
	Other, net			(130	)		(1.1	)		318			128.8			166			2.3
	Actual tax expense and effective rate		$	2,834			24.3	%	$	33			13.3	%	$	1,863			26.1	%
	The Bank is subject to the Pennsylvania Mutual Thrift Institutions Tax that is calculated at 11.5 percent of earnings based on U.S. generally accepted accounting principles with certain adjustments.
	Retained earnings include $4,600,000 at September 30, 2013, for which no provision for federal income tax has been made. This amount represents deductions for bad debt reserves for tax purposes, which were only allowed to savings institutions that met certain definitional tests prescribed by the Internal Revenue Code of 1986, as amended. The Small Business Job Protection Act of 1996 eliminated the special bad debt deduction granted solely to thrifts. Under the terms of the Act, there would be no recapture of the pre-1988 (base year) reserves. However, these pre-1988 reserves would be subject to recapture under the rules of the Internal Revenue Code if the Bank itself pays a cash dividend in excess of earnings and profits or liquidates. The act also provides for the recapture of deductions arising from “applicable excess reserve: defined as the total amount of reserve over the base year reserve.” The Bank’s total reserve exceeds the base year reserve, and deferred taxes have been provided for this excess.

Commitments

Commitments	12 Months Ended
	Sep. 30, 2013
Commitments And Contingencies Disclosure [Abstract]	'
Commitments	'
	11	COMMITMENTS
	In the normal course of business, management makes various commitments that are not reflected in the consolidated financial statements. These commitments involve, to varying degrees, elements of credit and interest rate risk in excess of the amount recognized in the Consolidated Balance Sheet. The Company’s exposure to credit loss in the event of nonperformance by the other parties to the financial instruments is represented by the contractual amounts as disclosed. Losses, if any, are charged to the allowance for loan losses. The Company minimizes its exposure to credit loss under these commitments by subjecting them to credit approval and review procedures and collateral requirements, as deemed necessary, in compliance with lending policy guidelines.
	The off-balance sheet commitments consist of the following (in thousands):
			2013		2012
	Commitments to extend credit		$	22,333	$	21,461
	Standby letters of credit			4,769		3,244
	Unfunded lines of credit			42,016		38,750
	Commitments to extend credit consist of fixed-rate commitments with interest rates ranging from 3.25 percent to 5.25 percent. The commitments outstanding at September 30, 2013, contractually mature in less than one year.
	The instruments involve, to varying degrees, elements of credit and interest rate risk in excess of the amount recognized in the Consolidated Balance Sheet. The Company uses the same credit policies in making commitments and conditional obligations as it does for on-balance sheet instruments. The amount of collateral obtained, as deemed necessary, is based upon management’s credit evaluation in compliance with the lending policy guidelines. Since many of the credit line commitments are expected to expire without being fully drawn upon, the total contractual amounts do not necessarily represent future funding requirements.
	Standby letters of credit and financial guarantees represent conditional commitments issued to guarantee performance of a customer to a third party. The coverage period for these instruments is typically a one-year period with renewal option subject to prior approval by management. Fees earned from the issuance of these letters are recognized over the coverage period. For secured letters of credit, the collateral is typically Company deposit instruments.

Lease_Commitments_and_Total_Re

Lease Commitments and Total Rental Expense	12 Months Ended
	Sep. 30, 2013
Text Block [Abstract]	'
Lease Commitments and Total Rental Expense	'
	12	LEASE COMMITMENTS AND TOTAL RENTAL EXPENSE
	The Company leases various branch locations and other offices under long-term operating leases. Future minimum lease payments by year and in the aggregate, under noncancellable operating leases with initial or remaining terms of one year or more, consisted of the following at September 30, 2013 (in thousands):
	2014		$	524
	2015			451
	2016			391
	2017			230
	2018			128
	2019 and beyond			1,151
	Total		$	2,875
	The total rental expenses for the above leases for the years ended September 30, 2013, 2012, and 2011, were $913,000, $835,000, and $760,000, respectively. The Company also operates six offices that currently do not have long-term operating leases.

Employee_Benefits

Employee Benefits	12 Months Ended
	Sep. 30, 2013
Postemployment Benefits [Abstract]	'
Employee Benefits	'
	13	EMPLOYEE BENEFITS
	Employee Stock Ownership Plan (“ESOP”)
	The Company created an ESOP for the benefit of employees who meet the eligibility requirements, which include having completed one year of service with the Company or its subsidiary and attained age 21. The ESOP trust acquired 1,358,472 shares of the Company’s stock from proceeds from a loan with the Company. The Company makes cash contributions to the ESOP on an annual basis sufficient to enable the ESOP to make the required loan payments. Cash dividends paid on allocated shares are distributed to participants and cash dividends paid on unallocated shares are used to repay the outstanding debt of the ESOP. The ESOP trust’s outstanding loan bears interest at 3.25 percent and requires an annual payment of principal and interest of $718,000 through December of 2036. The Company’s ESOP, which is internally leveraged, does not report the loans receivable extended to the ESOP as assets and does not report the ESOP debt due to the Company.
	As the debt is repaid, shares are released from the collateral and allocated to qualified employees based on the proportion of payments made during the year to the remaining amount of payments due on the loan through maturity. Accordingly, the shares pledged as collateral are reported as unallocated common stock held by the ESOP shares in the Consolidated Balance Sheet. As shares are released from collateral, the Company reports compensation expense equal to the current market price of the shares, and the shares become outstanding for earnings-per-share computations. The Company recognized ESOP expense of $485,000, $469,000, and $555,000, for the years ended September 30, 2013, 2012, and 2011, respectively.
	The following table presents the components of the ESOP shares:
			2013			2012
	Allocated shares			271,694			226,412
	Shares committed to be released			33,962			33,962
	Unreleased shares			1,052,816			1,098,098
	Total ESOP shares			1,358,472			1,358,472
	Fair value of unreleased shares (in thousands)		$	10,970		$	11,409
	Equity Incentive Plan
	The Company implemented the ESSA Bancorp, Inc. Equity Incentive Plan (the “Plan”). The Plan provides 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 allows 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.
	Certain officers, employees, and outside directors were granted in aggregate 1,140,469 NSOs; 317,910 ISOs; and 590,320 shares of restricted stock. Certain officers were granted in aggregate 30,000 shares of restricted stock on April 1, 2013. In accordance with generally accepted accounting principles, the Company began to expense the fair value of all share-based compensation grants over the requisite service periods.
	The Company classifies share-based compensation for employees and outside directors within “Compensation and employee benefits” in the consolidated statement of income to correspond with the same line item as compensation paid. 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 vested over a five-year service period and expire ten years after grant date. Management recognizes compensation expense for the fair values of these awards, which vested on a straight-line basis over the requisite service period of the awards.
	The 2008 restricted shares vested over a five-year service period. The 2013 restricted shares vest over an 18-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. Management recognizes compensation expense for the fair value of restricted shares on a straight-line basis over the requisite service period for the entire award.
	During the years ended September 30, 2013, 2012, and 2011, the Company recorded $1.5 million, $2.2 million, and $2.2 million of share-based compensation expense, consisting of stock option expense of $458,000, $687,000, and $705,000, and restricted stock expense of $1.1 million, $1.5 million, and $1.5 million, respectively. Expected future compensation expense relating to the 14,995 restricted shares at September 30, 2013, is $219,000 over the remaining vesting period of 1.00 years.
	The following is a summary of the Company’s stock option activity and related information for its option plan for the year ended September 30, 2013.
			Number of			Weighted-			Weighted-			Aggregate
			Stock Options			Average			Average			Intrinsic
						Exercise			Remaining			Value
						Price			Contractual			(in thousands)
									Term (in years)
	Outstanding, September 30, 2012			1,458,379		$	12.35			5.67		$	—
	Granted			—			—			—			—
	Exercised			—			—			—			—
	Forfeited			—			—			—			—
	Outstanding, September 30, 2013			1,458,379			12.35			4.67			—
	Exercisable at year-end			1,458,379			12.35			4.67			—
	The following is a summary of the status of the Company’s restricted stock as of September 30, 2013, and changes therein during the year then ended:
			Number of			Weighted-
			Restricted Stock			Average
						Grant Date
						Fair Value
	Nonvested at September 30, 2012			115,212		$	12.35
	Granted			30,000			10.94
	Vested			(130,217	)		12.19
	Forfeited			—			—
	Nonvested at September 30, 2013			14,995			10.94
	Defined Benefit Plan
	The Bank sponsors a trusteed, noncontributory defined benefit pension plan covering substantially all employees and officers. The plan calls for benefits to be paid to eligible employees at retirement based primarily upon years of service with the Bank and compensation rates near retirement. The Bank’s funding policy is to make annual contributions, if needed, based upon the funding formula developed by the plan’s actuary.
	The following table sets forth the change in plan assets and benefit obligation at September 30 (in thousands):
			2013			2012
	Change in benefit obligation:
	Benefit obligation at beginning of year		$	17,264		$	15,024
	Service cost			702			597
	Interest cost			716			713
	Actuarial gains			(3,588	)		1,043
	Benefits paid			(97	)		(113	)
	Benefit obligation at end of year			14,997			17,264
	Change in plan assets:
	Fair value of plan assets at beginning of year			14,042			11,457
	Actual return on plan assets			1,818			2,338
	Contributions			600			360
	Benefits paid			(97	)		(113	)
	Fair value of plan assets at end of year			16,363			14,042
	Funded status		$	1,366		$	(3,222	)
	Amounts not yet recognized as a component of net periodic pension cost (in thousands):
			2013			2012			2011
	Amounts recognized in accumulated other comprehensive income consist of:
	Net gain		$	1,979		$	6,742		$	7,697
	Prior service cost			—			—			—
Total		$	1,979		$	6,742		$	7,697
The accumulated benefit obligation for the defined benefit pension plan was $11,349,000 and $11,746,000 at September 30, 2013 and 2012, respectively.
The following table comprises the components of net periodic benefit cost for the years ended September 30 (in thousands):
		2013			2012			2011
Service cost		$	702		$	598		$	533
Interest cost			716			713			698
Expected return on plan assets			(1,034	)		(814	)		(769	)
Amortization of prior service cost			—			—			8
Amortization of unrecognized loss			392			475			404
Net periodic benefit cost		$	776		$	972		$	874
The estimated net loss and prior service cost for the defined benefit pension plans that will be amortized from accumulated other comprehensive income (loss) into net periodic benefit cost over the next fiscal year are $28,000 and $392,000, respectively.
Weighted-average assumptions used to determine benefit obligations:
		2013			2012
Discount rate			5.1	%		4.15	%
Rate of compensation increase			4			4
Weighted-average assumptions used to determine net periodic benefit cost for the years ended:
		2013			2012			2011
Discount rate			4.15	%		4.75	%		5.25	%
Expected long-term return on plan assets			7			7			7
Rate of compensation increase			4			5			5
The expected long-term rate of return was estimated using market benchmarks by which the plan assets would outperform the market in the future, based on historical experience adjusted for changes in asset allocation and expectations for overall lower future returns on similar investments compared with past periods.
Plan Assets
The following tables set forth by level, within the fair value hierarchy, the plan’s financial assets at fair value as of September 30, 2013 and 2012 (in thousands):
		September 30, 2013
		Level I			Level II			Level III			Total
Assets:
Investment in collective trusts
Fixed income		$	—		$	5,722		$			$	5,722
Equity			—			10,631						10,631
Investment in short-term investments			—			10						10
Total assets at fair value		$	—		$	16,363		$	—		$	16,363
		30-Sep-12
		Level I			Level II			Level III			Total
Assets:
Investment in collective trusts
Fixed income		$	—		$	4,884		$			$	4,884
Equity			—			9,142						9,142
Investment in short-term investments			—			16						16
Total assets at fair value		$	—		$	14,042		$	—		$	14,042
Investments in collective trusts and short-term investments are valued at the net asset value of shares held by the plan.
The Bank’s defined benefit pension plan weighted-average asset allocations at September 30, by asset category, are as follows:
Asset Category		2013			2012
Cash and fixed income securities			35	%		34.8	%
Equity securities			64.9			65.1
Other			0.1			0.1
Total			100	%		100	%
The Bank believes that the plan’s risk and liquidity position are, in large part, a function of the asset class mix. The Bank desires to utilize a portfolio mix that results in a balanced investment strategy. Two asset classes are outlined, as above. The target allocations of these classes are as follows: equities, 65 percent, and cash and fixed income, 35 percent.
Cash Flows
The Bank expects to contribute $600,000 to its pension plan in 2014.
Estimated future benefit payments, which reflect expected future service, as appropriate, are as follows (in thousands):
2014		$	72
2015			79
2016			85
2017			108
2018			298
2019-2023			3,963
401(k) Plan
The Bank also has a savings plan qualified under Section 401(k) of the Internal Revenue Code, which covers substantially all employees over 21 years of age. Employees can contribute to the plan, but are not required to. Employer contributions were suspended in January 2011. The expense related to the plan for the years ended September 30, 2013, 2012, and 2011, were $0, $0, and $65,000, respectively.
Supplemental Executive Retirement Plan
The Bank maintains a salary continuation agreement with certain executives of the Bank, which provides for benefits upon retirement to be paid to the executive for no less than 192 months, unless the executive elects to receive the present value of the payments as a lump sum. The Bank has recorded accruals of $680,000 and $677,000, at September 30, 2013 and 2012, respectively, which represent the estimated present value (using a discount rate of 6.25 percent) of the benefits earned under this agreement.

Regulatory_Restrictions

Regulatory Restrictions	12 Months Ended
	Sep. 30, 2013
Text Block [Abstract]	'
Regulatory Restrictions	'
	14	REGULATORY RESTRICTIONS
	Reserve Requirements
	The Bank is required to maintain reserve funds in cash or in deposit with the Federal Reserve Bank. The required reserve at September 30, 2013 and 2012, was $3,476,000 and $9,003,000, respectively.
	Dividend Restrictions
	Federal banking laws, regulations, and policies limit the Bank’s ability to pay dividends to the Company. Dividends may be declared and paid by the Bank only out of net earnings for the then current year. A dividend may not be declared or paid if it would impair the general reserves of the Bank as required to be maintained under the Savings Association Code. In addition, the Bank is required to notify the Federal Reserve Board prior to declaring a dividend to the Company and receive the nonobjection of the Federal Reserve Board to any such dividend.

Regulatory_Capital_Requirement

Regulatory Capital Requirements	12 Months Ended
	Sep. 30, 2013
Banking And Thrift [Abstract]	'
Regulatory Capital Requirements	'
	15	REGULATORY CAPITAL REQUIREMENTS
	Federal regulations require the Bank to maintain certain minimum amounts of capital. Specifically, the Bank is required to maintain certain minimum dollar amounts and ratios of Total and Tier I capital to risk-weighted assets and of Tier I capital to average total assets.
	In addition to the capital requirements, the Federal Deposit Insurance Corporation Improvement Act (“FDICIA”) established five capital categories ranging from “well capitalized” to “critically undercapitalized.” Should any institution fail to meet the requirements to be considered “adequately capitalized,” it would become subject to a series of increasingly restrictive regulatory actions. Management believes as of September 30, 2013, the Bank met all capital adequacy requirements to which it is subject.
	As of September 30, 2013 and 2012, the FDIC categorized the Bank as well capitalized under the regulatory framework for prompt corrective action. To be classified as a well capitalized financial institution, Total risk-based, Tier I risk-based, core capital, and tangible equity capital ratios must be at least 10 percent, 6 percent, 5 percent, and 1.5 percent, respectively. There have been no conditions or events since the notification that management believes have changed the Bank’s category.
	The following table reconciles the Bank’s capital under U.S. generally accepted accounting principles to regulatory capital (in thousands):
			2013			2012
	Total stockholders’ equity		$	161,701		$	168,676
	Accumulated other comprehensive (income) loss			1,235			(1,702	)
	Unrealized loss on equity securities			(10	)		—
	Goodwill and certain other intangible assets			(10,930	)		(11,812	)
	Disallowed servicing assets			(37	)		(36	)
	Tier I, core, and tangible capital			151,959			155,126
	Allowance for loan losses			7,297			6,402
	Unrealized gains on equity securities			—			4
	Total risk-based capital		$	159,256		$	161,532
	The Bank’s actual capital ratios are presented in the following table (in thousands):
			2013						2012
			Amount			Ratio			Amount		Ratio
	Total Capital
	(to Risk-Weighted Assets)
	Actual		$	159,256			20.4	%	$	161,532		19.6	%
	For Capital Adequacy Purposes			62,603			8			65,962		8
	To Be Well Capitalized			78,254			10			82,453		10
	Tier I Capital
	(to Risk-Weighted Assets)
	Actual		$	151,959			19.4	%	$	155,126		18.8	%
	For Capital Adequacy Purposes			31,301			4			32,981		4
	To Be Well Capitalized			46,952			6			49,972		6
	Tier I Capital
	(to Adjusted Assets)
	Actual		$	151,959			11.2	%	$	155,126		11.1	%
	For Capital Adequacy Purposes			54,337			4			56,001		4
	To Be Well Capitalized			67,921			5			70,002		5

Fair_Value_Measurements

Fair Value Measurements	12 Months Ended
	Sep. 30, 2013
Fair Value Disclosures [Abstract]	'
Fair Value Measurements	'
	16	FAIR VALUE MEASUREMENTS
	The following disclosures show the hierarchal disclosure framework associated within the level of pricing observations utilized in measuring assets and liabilities at fair value. The definition of fair value maintains the exchange price notion in earlier definitions of fair value but focuses on the exit price of the asset or liability. The exit price is the price that would be received to sell the asset or paid to transfer the liability adjusted for certain inherent risks and restrictions.
	The following table presents information about the Company’s securities, other real estate owned and impaired loans measured at fair value as of September 30, 2013 and 2012, and indicates the fair value hierarchy of the valuation techniques utilized by the Company to determine such fair value:
			September 30, 2013
			Level I		Level II			Level III		Total
	Assets measured at fair value on a recurring basis:
	Investment securities available for sale:
	Mortgage-backed securities		$	—	$	217,837		$	—	$	217,837
	Obligations of states and political subdivisions			—		23,909			—		23,909
	U.S. government agency securities			—		52,520			—		52,520
	Corporate obligations			—		12,773			—		12,773
	Trust-preferred securities			—		3,614			1,800		5,414
	Other debt securities			—		1,154			—		1,154
	Equity securities - financial services			2,015		—			—		2,015
	Total securities			2,015		311,807			1,800		315,622
	Assets measured at fair value on a nonrecurring basis:
	Foreclosed real estate owned			—		—			2,111		2,111
	Impaired loans			—		—			36,407		36,407
			30-Sep-12
			Level I		Level II			Level III		Total
	Assets measured at fair value on a recurring basis:
	Investment securities available for sale
	Mortgage-backed securities		$	—	$	215,804		$	—	$	215,804
	Obligations of states and political subdivisions			—		19,517			—		19,517
	U.S. government agency securities			—		74,484			—		74,484
	Corporate obligations			—		8,657			—		8,657
	Trust-preferred securities			—		4,493			1,740		6,233
	Other debt securities			—		1,512			—		1,512
	Equity securities - financial services			3,378		—			—		3,378
	Total securities			3,378		324,467			1,740		329,585
	Assets measured at fair value on a nonrecurring basis:
	Foreclosed real estate owned			—		—			2,998		2,998
	Impaired loans			—		—			32,520		32,520
	The following table presents a summary of changes in the fair value of the Company’s Level III investments for the years ended September 30, 2013 and 2012 (in thousands).
			Fair Value Measurement Using
			Significant Unobservable Inputs
			(Level III)
			September 30, 2013		September 30, 2012
	Beginning balance		$	1,740	$	—
	Purchases, sales, issuances, settlements, net			—		1,528
	Total unrealized gain:
	Included in earnings			—		—
	Included in other comprehensive income			60		212
	Transfers in and/or out of Level III			—		—
			$	1,800	$	1,740
	Financial assets and liabilities must be identified as having been valued according to a specified level of input, I, II or III. Level I inputs are quoted prices (unadjusted) in active markets for identical assets or liabilities that the Bank has the ability to access at the measurement date. Fair values determined by Level II inputs utilize inputs other than quoted prices included in Level I that are observable for the asset, either directly or indirectly. Level II inputs include quoted prices for similar assets in active markets, and inputs other than quoted prices that are observable for the asset or liability. Level III inputs are unobservable inputs for the asset, and include situations where there is little, if any, market activity for the asset or liability. In certain cases, the inputs used to measure fair value may fall into different levels of the fair value hierarchy. In such cases, the level in the fair value hierarchy, within which the fair value measurement in its entirety falls, has been determined based on the lowest level input that is significant to the fair value measurement in its entirety. The Company’s assessment of the significance of a particular input to the fair value measurement in its entirety requires judgment, and considers factors specific to the asset.
	The measurement of fair value should be consistent with one of the following valuation techniques: market approach, income approach, and/or cost approach. The market approach uses prices and other relevant information generated by market transactions involving identical or comparable assets or liabilities (including a business). For example, valuation techniques consistent with the market approach often use market multiples derived from a set of comparables. Multiples might lie in ranges with a different multiple for each comparable. The selection of where within the range the appropriate multiple falls requires judgment, considering factors specific to the measurement (qualitative and quantitative). Valuation techniques consistent with the market approach include matrix pricing. Matrix pricing is a mathematical technique used principally to value debt securities without relying exclusively on quoted prices for the specific securities, but rather by relying on a security’s relationship to other benchmark quoted securities. Most of the securities classified as available for sale are reported at fair value utilizing Level II inputs. For these securities, the Company obtains fair value measurements from an independent pricing service. The fair value measurements consider observable data that may include dealer quoted market spreads, cash flows, the U.S. Treasury yield curve, live trading levels, trade execution data, market consensus prepayment speeds, credit information and the bond’s terms and conditions, among other things. Securities reported at fair value utilizing Level I inputs are limited to actively traded equity securities whose market price is readily available from the New York Stock Exchange or the NASDAQ exchange. 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 September 30, 2013, 233 impaired loans with a carrying value of $37.2 million were reduced by specific valuation allowance totaling $819,000 resulting in a net fair value of $36.4 million based on Level III 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 III inputs to determine fair value:
			Quantitative Information About Level III Fair Value Measurements
			Fair Value		Valuation		Unobservable	Range
			Estimate		Techniques		Input
	September 30, 2013
	Impaired loans		$	36,407	Appraisal of		Appraisal	0% to 30%
					collateral (1)		adjustments (2)
	Foreclosed real estate owned			2,111	Appraisal of		Appraisal	0% to 30%
					collateral (1), (3)		adjustments (2)
	September 30, 2012
	Impaired loans		$	32,520	Appraisal of		Appraisal	0% to 30%
					collateral (1)		adjustments (2)
	Foreclosed real estate owned			2,998	Appraisal of		Appraisal	0% to 30%
					collateral (1), (3)		adjustments (2)
	-1	Fair value is generally determined through independent appraisals of the underlying collateral, which generally include various Level III inputs which are not identifiable.
	-2	Appraisals may be adjusted by management for qualitative factors such as economic conditions and estimated liquidation expenses. The range of liquidation expenses and other appraisal adjustments is presented as a percent of the appraisal.
-3	Includes qualitative adjustments by management and estimated liquidation expenses.
Investment Securities Available for Sale
Fair values for securities available for sale are determined by obtaining quoted prices on nationally recognized securities exchanges or matrix pricing, which is a mathematical technique that is widely used in the industry to value debt securities without relying exclusively on quoted prices for the specific securities but rather by relying on the securities’ relationship to other benchmark-quoted securities.
Impaired Loans
The Company has measured impairment on impaired loans generally based on the fair value of the loan’s collateral. Evaluating impaired loan collateral is based on Level II inputs utilizing outside appraisals. Those impaired loans for which management incorporates significant adjustments for sales costs and other discount assumptions regarding market conditions are considered Level III fair values. The fair value consists of the loan balances of $37,226,000 less their valuation allowances of $819,000 at September 30, 2013. The fair value consists of the loan balances of $33,471,000 less their valuation allowances of $952,000 at September 30, 2012.
Foreclosed Real Estate Owned
Foreclosed real estate owned is measured at fair value, less cost to sell at the date of foreclosure; valuations are periodically performed by management; and the assets are carried at fair value, less cost to sell. Income and expenses from operations and changes in valuation allowance are included in the net expenses from foreclosed real estate.

Fair_Value_of_Financial_Instru

Fair Value of Financial Instruments	12 Months Ended
	Sep. 30, 2013
Text Block [Abstract]	'
Fair Value of Financial Instruments	'
	17	FAIR VALUE OF FINANCIAL INSTRUMENTS
	The fair values of the Company’s financial instruments are as follows (in thousands):
			September 30, 2013
			Carrying								Total
			Value		Level I		Level II		Level III		Fair Value
	Financial assets:
	Cash and cash equivalents		$	26,648	$	26,648	$	—	$	—	$	26,648
	Investment and mortgage-backed securities available for sale			315,622		2,015		311,807		1,800		315,622
	Loans receivable, net			928,230		—		—		951,120		951,120
	Accrued interest receivable			4,413		4,413		—		—		4,413
	Regulatory stock			9,415		9,415		—		—		9,415
	Mortgage servicing rights			382		—		—		382		382
	Bank-owned life insurance			28,797		28,797		—		—		28,797
	Financial liabilities:
	Deposits		$	1,041,059	$	406,890	$	—	$	638,510	$	1,045,400
	Short-term borrowings			23,000		23,000		—		—		23,000
	Other borrowings			129,260		—				124,504		124,504
	Advances by borrowers for taxes and insurance			4,962		4,962		—		—		4,962
	Accrued interest payable			833		833		—		—		833
			September 30, 2012
			Carrying								Total
			Value		Level I		Level II		Level III		Fair Value
	Financial assets:
	Cash and cash equivalents		$	15,550	$	15,550	$	—	$	—	$	15,550
	Investment and mortgage-backed securities available for sale			329,585		3,378		324,467		1,740		329,585
	Loans receivable, net			950,355		—		—		997,685		997,685
	Accrued interest receivable			4,929		4,929		—		—		4,929
	Regulatory stock			21,914		21,914		—		—		21,914
	Mortgage servicing rights			365		—		—		365		365
	Bank-owned life insurance			27,848		27,848		—		—		27,848
	Financial liabilities:
	Deposits		$	995,634	$	409,499	$	597,028	$	—	$	1,006,527
	Short-term borrowings			43,281		43,281		—		—		43,281
	Other borrowings			191,460		—		195,636		—		195,636
	Advances by borrowers for taxes and insurance			3,432		3,432		—		—		3,432
	Accrued interest payable			1,128		1,128		—		—		1,128
	Financial instruments are defined as cash, evidence of an ownership interest in an entity, or a contract which creates an obligation or right to receive or deliver cash or another financial instrument from/to a second entity on potentially favorable or unfavorable terms.
	Fair value is defined as the amount at which a financial instrument could be exchanged in a current transaction between willing parties other than in a forced or liquidation sale. If a quoted market price is available for a financial instrument, the fair value would be calculated based upon the market price per trading unit of the instrument.
	If no readily available market exists, the fair value for financial instruments should be based upon management’s judgment regarding current economic conditions, interest rate risk, expected cash flows, future estimated losses, and other factors as determined through various option pricing formulas or simulation modeling.
	As many of these assumptions result from judgments made by management based upon estimates which are inherently uncertain, the resulting values may not be indicative of the amount realizable in the sale of a particular financial instrument. In addition, changes in the assumptions on which the values are based may have a significant impact on the resulting estimated values.
	As certain assets and liabilities, such as deferred tax assets, premises and equipment, and many other operational elements of the Company, are not considered financial instruments but have value, this fair value of financial instruments would not represent the full market value of the Company.
	The Company employed simulation modeling in determining the fair value of financial instruments for which quoted market prices were not available based upon the following assumptions:
	Cash and Cash Equivalents, Accrued Interest Receivable, Short-Term Borrowings, Advances by Borrowers for Taxes and Insurance, and Accrued Interest Payable
	The fair value approximates the current book value.
	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 FHLB 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 FHLB stock is not actively traded on a secondary market and held exclusively by member financial institutions, the fair market value approximates the carrying amount.
	Certificates of Deposit, Loans Receivable, Deposits, Other Borrowings, and Mortgage Servicing Rights
	The fair values for loans and mortgage servicing rights are estimated by discounting contractual cash flows and adjusting for prepayment estimates. Discount rates are based upon rates generally charged for such loans with similar characteristics. Demand, savings, and money market deposit accounts are valued at the amount payable on demand as of year end. Fair values for certificates of deposit, time deposits, and other borrowings are estimated using a discounted cash flow calculation that applies contractual costs currently being offered in the existing portfolio to current market rates being offered for deposits and borrowings of similar remaining maturities.
	Commitments to Extend Credit
	These financial instruments are generally not subject to sale, and fair values are not readily available. The carrying value, represented by the net deferred fee arising from the unrecognized commitment, and the fair value, determined by discounting the remaining contractual fee over the term of the commitment using fees currently charged to enter into similar agreements with similar credit risk, are not considered material for disclosure. The contractual amounts of unfunded commitments are presented in Note 11.

Accumulated_Other_Comprehensiv

Accumulated Other Comprehensive Income	12 Months Ended
	Sep. 30, 2013
Equity [Abstract]	'
Accumulated Other Comprehensive Income	'
	18	ACCUMULATED OTHER COMPREHENSIVE INCOME
	The activity in accumulated other comprehensive income for the years ended September 30, 2013 and 2012, is as follows (in thousands):
			Accumulated Other Comprehensive Income (1)
			Defined			Unrealized Gains			Total
			Benefit			(Losses) on
			Pension			Securities
			Plan			Available for Sale
	Balance at September 30, 2012		$	(4,450	)	$	6,208		$	1,758
	Other comprehensive income before reclassifications			—			(5,643	)		(5,643	)
	Amounts reclassified from accumulated other comprehensive income			3,144			(494	)		2,650
	Period change			3,144			(6,137	)		(2,993	)
	Balance at September 30, 2013		$	(1,306	)	$	71		$	(1,235	)
	Balance at September 30, 2011		$	(5,080	)	$	5,666		$	586
	Other comprehensive income before reclassifications			—			767			767
	Amounts reclassified from accumulated other comprehensive income			631			(226	)		405
	Period change			631			541			1,172
	Balance at September 30, 2012		$	(4,449	)	$	6,207		$	1,758
	(1)	All amounts are net of tax. Related income tax expense or benefit is calculated using an income tax rate approximating 34%.
			Amount Reclassified from
			Accumulated Other Comprehensive
			Income
	Details about Accumulated Other Comprehensive Income Components		For the Year Ended						Affected Line Item
			September 30, (3)						in the Consolidated
	(in thousands)		2013			2012			Statement of Income
	Securities available for sale (1):
	Net securities gains reclassified into earnings		$	749		$	343		Gain on sale of investments, net
	Related income tax expense			(255	)		(117	)	Provision for income taxes
	Net effect on accumulated other comprehensive income for the period			494			226		Net of tax
	Defined benefit pension plan (2):
	Amortization of net loss and prior service costs			(4,763	)		(956	)	Compensation and employee benefits
	Related income tax expense			1,619			325		Provision for income taxes
	Net effect on accumulated other comprehensive income for the period			(3,144	)		(631	)	Net of tax
	Total reclassifications for the period		$	(2,650	)	$	(405	)	Net of tax
	-1	For additional details related to unrealized gains on securities and related amounts reclassified from accumulated other comprehensive income see Note 3, “Investment Securities.”
	-2	Included in the computation of net periodic pension cost. See Note 13, “Employee Benefits” for additional detail.
	-3	Amounts in parenthesis indicate debits.

Parent_Company

Parent Company	12 Months Ended
	Sep. 30, 2013
Condensed Financial Information Of Parent Company Only Disclosure [Abstract]	'
Parent Company	'
	19	PARENT COMPANY
	Condensed financial statements of ESSA Bancorp, Inc. are as follows (in thousands):
	CONDENSED BALANCE SHEET
			September 30,
			2013			2012
	ASSETS
	Cash and due from banks		$	3,195		$	3,650
	Certificates of deposit			17			16
	Investment securities available for sale			25			1,280
	Investment in subsidiary			161,701			168,082
	Premises and equipment, net			1,152			1,727
	Other assets			1,211			1,505
	TOTAL ASSETS		$	167,301		$	176,260
	LIABILITIES AND STOCKHOLDERS’ EQUITY
	Other liabilities		$	855		$	849
	Stockholders’ equity			166,446			175,411
	TOTAL LIABILITIES AND STOCKHOLDERS’ EQUITY		$	167,301		$	176,260
	CONDENSED STATEMENT OF INCOME
			Year Ended September 30,
			2013			2012			2011
	INCOME
	Interest income		$	408		$	403		$	473
	Net gains on sale of investments			30			—			99
	Dividends			15,000			25,000			10,000
	Total income			15,438			25,403			10,572
	EXPENSES
	Interest expense			—			101			—
	Professional fees			505			1,741			303
	Other			527			132			63
	Total expenses			1,032			1,974			366
	Income before income tax expense			14,406			23,429			10,206
	Income tax expense (benefit)			—			(32	)		94
	Income before equity in undistributed net earnings of subsidiary			14,406			23,461			10,112
	Equity in undistributed net earnings of subsidiary			(5,583	)		(23,246	)		(4,854	)
	NET INCOME		$	8,823		$	215		$	5,258
						September 30,
			2013			2012			2011
	OPERATING ACTIVITIES
	Net income		$	8,823		$	215		$	5,258
	Adjustments to reconcile net income to net cash provided by operating activities:
	Equity in undistributed net earnings of subsidiary			5,583			23,246			4,854
	Net gain on sale of investments			(30	)		—			(99	)
	(Decrease) increase in accrued income taxes			(12	)		1,254			56
	Decrease in accrued interest receivable			8			8			117
	Deferred federal income taxes			(29	)		576			(91	)
	Other, net			798			(1,362	)		186
	Net cash provided by operating activities			15,141			23,937			10,281
	INVESTING ACTIVITIES
	Business acquisitions			—			(12,306	)		—
	Proceeds from principal repayment, maturities, and sales			1,200			—			9,788
	Net cash provided by (used for) investing activities			1,200			(12,306	)		9,788
	FINANCING ACTIVITIES
	Repayment of trust-preferred debt			—			(8,596	)		—
	Purchase of treasury stock shares			(14,501	)		(332	)		(16,917	)
	Dividends on common stock			(2,295	)		(2,249	)		(2,315	)
	Net cash used for financing activities			(16,796	)		(11,177	)		(19,232	)
	Increase (decrease) in cash			(455	)		454			837
	CASH AT BEGINNING OF YEAR			3,650			3,196			2,359
	CASH AT END OF YEAR		$	3,195		$	3,650		$	3,196

Selected_Quarterly_Data_Unaudi

Selected Quarterly Data (Unaudited)	12 Months Ended
	Sep. 30, 2013
Quarterly Financial Information Disclosure [Abstract]	'
Selected Quarterly Data (Unaudited)	'
	20	SELECTED QUARTERLY DATA (UNAUDITED)
			Three Months Ended
			December 31,		March 31,		June 30,		September 30,
			2012		2013		2013		2013
	Total interest income		$	13,950	$	12,690	$	12,491	$	11,971
	Total interest expense			3,231		2,806		2,642		2,578
	Net interest income			10,719		9,884		9,849		9,393
	Provision for loan losses			1,000		850		1,100		800
	Net interest income after provision for loan losses			9,719		9,034		8,749		8,593
	Total noninterest income			2,026		2,458		1,800		1,740
	Total noninterest expense			7,505		8,790		8,154		8,013
	Income (loss) before income taxes			4,240		2,702		2,395		2,320
	Income taxes (benefit)			1,361		662		519		292
	Net income		$	2,879	$	2,040	$	1,876	$	2,028
	Per share data:
	Net income
	Basic		$	0.24	$	0.17	$	0.16	$	0.19
	Diluted		$	0.24	$	0.17	$	0.16	$	0.19
	Average shares outstanding
	Basic			12,088,125		11,763,581		11,409,791		10,954,982
	Diluted			12,088,125		11,763,581		11,409,791		10,954,982
			Three Months Ended
			December 31,		March 31,		June 30,		September 30,
			2011		2012		2012		2012
	Total interest income		$	11,029	$	10,834	$	10,576	$	12,761
	Total interest expense			4,321		4,063		3,840		3,908
	Net interest income			6,708		6,771		6,736		8,853
	Provision for loan losses			500		650		600		800
	Net interest income after provision for loan losses			6,208		6,121		6,136		8,053
	Total noninterest income			1,524		1,623		1,495		2,093
	Total noninterest expense			6,662		6,874		6,526		12,943
	Income (loss) before income taxes			1,070		870		1,105		(2,797	)
	Income taxes (benefit)			184		211		311		(673	)
	Net income (loss)		$	886	$	659	$	794	$	(2,124	)
	Per share data:
	Net income
	Basic		$	0.08	$	0.06	$	0.07	$	(0.18	)
	Diluted		$	0.08	$	0.06	$	0.07	$	(0.18	)
	Average shares outstanding
	Basic			10,807,598		10,840,604		10,857,483		11,632,918
	Diluted			10,807,598		10,840,604		10,857,483		11,632,918

Subsequent_Events

Subsequent Events	12 Months Ended
	Sep. 30, 2013
Subsequent Events [Abstract]	'
Subsequent Events	'
	21	SUBSEQUENT EVENTS
	On August 16, 2013, the Company announced its intent to acquire the customer deposits and loans from two branches and the property, plant, and equipment of one branch of another community bank in the Company’s market area. The estimated cost of the property, plant, and equipment is $2.5 million. The cost of the customer loans to be acquired, at par, will depend on the balances of these loans immediately preceding the transaction’s closing. The cost of the customer deposits to be acquired, including a weighted-average premium of 5.4 percent will depend on the balances of the deposits immediately preceding the transaction’s closing. The transaction is expected to close in January 2014.
	On November 18, 2013, the Company announced that it and Franklin Security Bancorp, Inc. (“FSB”) had executed a definitive agreement whereby the Company will acquire FSB and its wholly owned subsidiary, Franklin Security Bank, through and all-cash deal. Under the terms of the merger agreement, stockholders of FSB will receive $9.75 per share or an aggregate of approximately $15.7 million. Pending the satisfaction of customary closing conditions, including the receipt of all regulatory approvals and the approval of FSB stockholders, the transaction is expected to close in the second quarter of 2014. The merger is expected to be immediately accretive to ESSA Bancorp Inc.’s earnings upon closing.

Summary_of_Significant_Account1

Summary of Significant Accounting Policies (Policies)	12 Months Ended
	Sep. 30, 2013
Accounting Policies [Abstract]	'
Nature of Operations and Basis of Presentation	'
	Nature of Operations and Basis of Presentation
	The consolidated financial statements include the accounts of ESSA Bancorp, Inc. (the “Company”), its wholly owned subsidiary, ESSA Bank & Trust (the “Bank”), and the Bank’s wholly owned subsidiaries, ESSACOR Inc.; Pocono Investments Company; ESSA Advisory Services, LLC; Integrated Financial Corporation; and Integrated Abstract Incorporated, a wholly owned subsidiary of Integrated Financial Corporation. The primary purpose of the Company is to act as a holding company for the Bank. The Company is subject to regulation and supervision as a savings and loan holding company by the Federal Reserve Board. The Bank is a Pennsylvania-chartered savings association located in Stroudsburg, Pennsylvania. The Bank’s primary business consists of the taking of deposits and granting of loans to customers generally in Monroe, Northampton, and Lehigh counties, Pennsylvania. The Bank is subject to regulation and supervision by the Pennsylvania Banking Department 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. Integrated Abstract Incorporated is a Pennsylvania Corporation that provides title insurance services. All significant intercompany accounts and transactions have been eliminated in consolidation.
Use of Estimates in the Preparation of Financial Statements	'
	Use of Estimates in the Preparation of Financial Statements
	The accounting principles followed by the Company and its subsidiary and the methods of applying these principles conform to U.S. generally accepted accounting principles and to general practice within the banking industry. In preparing the consolidated financial statements, the Company is required to make estimates and assumptions that affect the reported amounts of assets and liabilities as of the Consolidated Balance Sheet date and related revenues and expenses for the period. Actual results could differ significantly from those estimates.
Securities	'
	Securities
	The Company determines the appropriate classification of debt securities at the time of purchase and reevaluates such designation as of each balance sheet date.
	Securities classified as available for sale are those securities that the Company intends to hold for an indefinite period of time but not necessarily to maturity. Any decision to sell a security classified as available for sale would be based on various factors, including significant movement in interest rates, changes in maturity mix of the Company’s assets and liabilities, liquidity needs, regulatory capital considerations, and other similar factors.
	Securities available for sale are carried at fair value. Unrealized gains and losses are reported in other comprehensive income, net of the related deferred tax effects. Realized gains or losses, determined on the basis of the cost of the specific securities sold, are included in earnings. Premiums and discounts are recognized in interest income using the interest method over the period to maturity.
	Declines in the fair value of available-for-sale securities below their cost that are deemed to be other than temporary are reflected in earnings as realized losses. In estimating other-than-temporary impairment losses, the Company considers: (1) the length of time and the extent to which the fair value has been less than cost; (2) the financial condition and near-term prospects of the issuer; and (3) the Company’s intent to sell the security or whether its more likely than not that the Company would be required to sell the security before its anticipated recovery in market value.
Loans Receivable	'
	Loans Receivable
	Loans receivable that the Company has the intent and ability to hold for the foreseeable future or until maturity or payoff are stated at their outstanding unpaid principal balances, net of an allowance for loan losses and any deferred fees and costs. Interest income is accrued on the unpaid principal balance. Loan origination fees, net of certain direct origination costs, are deferred and recognized as an adjustment of the yield (interest income) of the related loans. The Company is generally amortizing these amounts over the contractual life of the loan. Mortgage loans sold in the secondary market are sold without recourse.
	The accrual of interest is generally discontinued when the contractual payment of principal or interest has become 90 days past due or the Company has serious doubts about further collectibility of principal or interest, even though the loan is currently performing. A loan may remain on accrual status if it is in the process of collection and is either guaranteed or well secured. When a loan is placed on nonaccrual status, unpaid interest credited to income is reversed. Interest received on nonaccrual loans generally is either applied against principal or reported as interest income, according to the Company’s judgment as to the collectibility of principal. Generally, loans are restored to accrual status when the obligation is brought current and has performed in accordance with the contractual terms for a reasonable period of time and the ultimate collectibility of the total contractual principal and interest is no longer in doubt.
Loans Held for Sale	'
	Loans Held for Sale
	Loans originated and intended for sale in the secondary market are carried at the lower of cost or estimated fair value in the aggregate. Net unrealized losses, if any, are recognized through a valuation allowance by charges to income. All sales are made without recourse.
Loans Acquired	'
	Loans Acquired
	Loans acquired including loans that have evidence of deterioration of credit quality since origination and for which it is probable, at acquisition, that the Company will be unable to collect all contractually required payments receivable, are initially recorded at fair value (as determined by the present value of expected future cash flows) with no valuation allowance. Loans are evaluated individually to determine if there is evidence of deterioration of credit quality since origination. The difference between the undiscounted cash flows expected at acquisition and the investment in the loan, or the “accretable yield,” is recognized as interest income on a level-yield method over the life of the loan. Contractually required payments for interest and principal that exceed the undiscounted cash flows expected at acquisition, or the “non-accretable difference,” are not recognized as a yield adjustment or as a loss accrual or a valuation allowance. Increases in expected cash flows subsequent to the initial investment are recognized prospectively through adjustment of the yield on the loan over its remaining estimated life. Decreases in expected cash flows are recognized immediately as impairment. Any valuation allowances on these impaired loans reflect only losses incurred after acquisition.
	For purchased loans acquired that are not deemed impaired at acquisition, credit discounts representing the principal losses expected over the life of the loan are a component of the initial fair value. Loans may be aggregated and accounted for as a pool of loans if the loans being aggregated have common risk characteristics. Subsequent to the purchase date, the methods utilized to estimate the required allowance for credit losses for these loans is similar to originated loans; however, the Company records a provision for loan losses only when the required allowance exceeds any remaining credit discounts. The remaining differences between the purchase price and the unpaid principal balance at the date of acquisition are recorded in interest income over the life of the loans.
Allowance for Loan Losses	'
	Allowance for Loan Losses
	The allowance for loan losses is established through provisions for loan losses charged against income. Loans deemed to be uncollectible are charged against the allowance for loan losses, and subsequent recoveries, if any, are credited to the allowance.
	The allowance for loan losses is maintained at a level by management which represents the evaluation of known and inherent risks in the loan portfolio at the consolidated balance sheet date. Management’s periodic evaluation of the adequacy of the allowance is based on the Company’s past loan loss experience, known and inherent risks in the portfolio, adverse situations that may affect the borrower’s ability to repay, the estimated value of any underlying collateral, composition of the loan portfolio, current economic conditions, and other relevant factors. This evaluation is inherently subjective, since it requires material estimates that may be susceptible to significant change, including the amounts and timing of future cash flows expected to be received on impaired loans.
	The allowance consists of specific and general components. The specific component relates to loans that are classified as impaired. For such loans an allowance is established when the discounted cash flows (or collateral value or observable market price) of the impaired loan is lower than the carrying value of that loan. The general component covers nonclassified loans and is based on historical loss experience adjusted for qualitative factors.
	A loan is considered impaired when, based on current information and events, it is probable that the Company will be unable to collect the scheduled payments of principal or interest when due according to the contractual terms of the loan agreement and all loan types are considered impaired if the loan is restructured in a troubled debt restructuring. Factors considered by management in determining impairment include payment status, collateral value, and the probability of collecting scheduled principal and interest payments when due. Loans that experience insignificant payment delays and payment shortfalls generally are not classified as impaired. Management determines the significance of payment delays and payment shortfalls on a case-by-case basis, taking into consideration all of the circumstances surrounding the loan and the borrower, including the length of the delay, the reasons for the delay, the borrower’s prior payment record, and the amount of the shortfall in relation to the principal and interest owed. Impairment is measured on a loan-by-loan basis for commercial and construction loans by the present value of expected future cash flows discounted at the loan’s effective interest rate, the loan’s obtainable market price, or the fair value of the collateral if the loan is collateral-dependent.
	Large groups of smaller balance homogeneous loans are collectively evaluated for impairment. Accordingly, the Company does not separately identify individual consumer and residential mortgage loans for impairment disclosures.
	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 a period of performance.
Federal Home Loan Bank Stock	'
	Federal Home Loan Bank Stock
	The Company is a member of the Federal Home Loan Bank System and holds stock in the Federal Home Loan Bank (“FHLB”) of Pittsburgh. As a member, the Company maintains an investment in the capital stock of the FHLB of Pittsburgh in an amount not less than 35 basis points of the outstanding member asset value plus 4.6 percent of its outstanding FHLB borrowings, as calculated throughout the year. The equity security is accounted for at cost and classified separately on the Consolidated Balance Sheet. The stock is bought from and sold to the FHLB based upon its $100 par value. The stock does not have a readily determinable fair value and as such is classified as restricted stock, carried at cost and evaluated by management. The stock’s value is determined by the ultimate recoverability of the par value rather than by recognizing temporary declines. The determination of whether the par value will ultimately be recovered is influenced by criteria such as the following: (a) The significance of the decline in net assets of the FHLB as compared to the capital stock amount and the length of time this situation has persisted (b) Commitments by the FHLB to make payments required by law or regulation and the level of such payments in relation to the operating performance (c) The impact of legislative and regulatory changes on the customer base of the FHLB and (d) The liquidity position of the FHLB.
	While the FHLB have been negatively impacted by the current economic conditions, the FHLB of Pittsburgh has reported profits for 2012, remains in compliance with regulatory capital and liquidity requirements, and continues to make redemptions at the par value. With consideration given these factors, management concluded that the stock was not impaired at September 30, 2013.
Loan Servicing	'
	Loan Servicing
	Servicing assets are recognized as separate assets when rights are acquired through purchase or through sale of financial assets. Capitalized servicing rights are reported in other assets and are amortized into noninterest income in proportion to, and over the period of, the estimated future net servicing income of the underlying financial assets. Servicing assets are evaluated for impairment based upon a third-party appraisal. Fair value is determined using prices for similar assets with similar characteristics, when available, or based upon discounted cash flows using market-based assumptions. Impairment is recognized through a valuation allowance to the extent that fair value is less than the capitalized amount. The Company’s loan servicing assets at September 30, 2013 and 2012, were not impaired. Total servicing assets included in other assets as of September 30, 2013 and 2012, were $382,000 and $365,000, respectively.
Premises and Equipment	'
	Premises and Equipment
	Land is carried at cost. Premises and equipment are stated at cost less accumulated depreciation. Depreciation is calculated using the straight-line method over the useful lives of the related assets, which range from 10 to 40 years for buildings, land improvements, and leasehold improvements and 3 to 7 years for furniture, fixtures, and equipment. Expenditures for maintenance and repairs are charged to operations as incurred. Costs of major additions and improvements are capitalized.
Bank-Owned Life Insurance ("BOLI")	'
	Bank-Owned Life Insurance (“BOLI”)
	The Company owns insurance on the lives of a certain group of key employees. The policies were purchased to help offset the increase in the costs of various fringe benefit plans, including healthcare. The cash surrender value of these policies is included as an asset on the Consolidated Balance Sheet, and any increase in cash surrender value is recorded as noninterest income on the Consolidated Statement of Income. In the event of the death of an insured individual under these policies, the Company would receive a death benefit which would be recorded as noninterest income.
Foreclosed Real Estate	'
	Foreclosed Real Estate
	Real estate owned acquired in settlement of foreclosed loans is carried at fair value minus estimated costs to sell. At acquisition of real estate acquired in settlement of foreclosed loans, the excess of the remaining loan balance over the asset’s estimated fair value less cost to sell is charged off against the allowance for loan losses. Subsequent declines in the asset’s value are recognized as noninterest expense in the consolidated statement of income. Operating expenses of such properties, net of related income, are expensed in the period incurred.
Goodwill and Intangible Assets	'
	Goodwill and Intangible Assets
	Goodwill is not amortized, but it is tested at least annually for impairment, in the fourth quarter or more frequently if indicators of impairment are present. If the estimated current fair value of a reporting unit exceeds its carrying value, no additional testing is required and an impairment loss is not recorded. The Company uses market capitalization and multiples of tangible book value methods to determine the estimated current fair value of its reporting unit. Based on this analysis, no impairment was recorded in 2013 or 2012.
	The other intangibles assets are assigned useful lives, which are amortized on an accelerated basis over their weighted-average lives. The Company periodically reviews the intangible asset for impairment as events or changes in circumstances indicate that the carrying amount of such asset may not be recoverable.
Employee Benefit Plans	'
	Employee Benefit Plans
	The Bank maintains a noncontributory, defined benefit pension plan for all employees who have met age and length of service requirements. The Bank’s funding policy is to contribute annually up to the maximum amount that can be deducted for federal income tax purposes. The Bank also maintains a defined contribution Section 401(k) plan covering eligible employees. The Company created an ESOP for the benefit of employees who meet certain eligibility requirements. The Company makes cash contributions to the ESOP on an annual basis.
	The Company maintains an equity incentive plan to provide for issuance or granting of shares of common stock for stock options or restricted stock. The Company has recorded stock-based employee compensation cost using the fair value method as allowed under generally accepted accounting principles. Management estimated the fair values of all option grants using the Black-Scholes option-pricing model. Management estimated the expected life of the options using the simplified method as allowed under generally accepted accounting principles. The risk-free rate was determined utilizing the treasury yield for the expected life of the option contract.
Advertising Costs	'
	Advertising Costs
	In accordance with generally accepted accounting principles, the Company expenses all advertising expenditures incurred.
Transfers of Financial Assets	'
	Transfers of Financial Assets
	Transfers of financial assets are accounted for as sales when control over the assets has been surrendered. Control over transferred assets is deemed to be surrendered when (1) the assets have been isolated from the Company; (2) the transferee obtains the right (free of conditions that constrain it from taking advantage of that right) to pledge or exchange the transferred assets; and (3) the Company does not maintain effective control over the transferred assets through an agreement to repurchase them before their maturity.
Income Taxes	'
	Income Taxes
	Deferred tax assets and liabilities are reflected based on the differences between the financial statement and the income tax basis of assets and liabilities using the enacted marginal tax rates. Deferred income tax expense and benefit are based on the changes in the deferred tax assets or liabilities from period to period. Deferred tax assets and liabilities are reflected at currently enacted income tax rates applicable to the period in which such items are expected to be realized or settled. As changes in tax rates are enacted, deferred tax assets and liabilities are adjusted through the provision for income taxes. The Company files a consolidated federal income tax return and individual state income tax returns.
	The Company prescribes a recognition threshold and a measurement attribute for the financial statement recognition and measurement of a tax position taken or expected to be taken in a tax return. Benefits from tax positions should be recognized in the financial statements only when it is more likely than not that the tax position will be sustained upon examination by the appropriate taxing authority that would have full knowledge of all relevant information. A tax position that meets the more-likely-than-not recognition threshold is measured at the largest amount of benefit that is greater than 50 percent likely of being realized upon ultimate settlement. Tax positions that previously failed to meet the more-likely-than-not recognition threshold should be recognized in the first subsequent financial reporting period in which that threshold is met. Previously recognized tax positions that no longer meet the more-likely-than-not recognition threshold should be derecognized in the first subsequent financial reporting period in which that threshold is no longer met. Accounting literature also provides guidance on the accounting for and disclosure of unrecognized tax benefits, interest, and penalties. In accordance with generally accepted accounting principles, interest or penalties incurred for income taxes will be recorded as a component of other expenses.
Cash and Cash Equivalents	'
	Cash and Cash Equivalents
	The Company has defined cash and cash equivalents as cash and due from banks and interest-bearing deposits with other institutions with original maturities of less than 90 days.
Earnings Per Share	'
	Earnings Per Share
	The Company provides dual presentation of basic and diluted earnings per share. Basic earnings per share are calculated utilizing net income as reported as the numerator and average shares outstanding as the denominator. The computation of diluted earnings per share differs in that the dilutive effects of any options are adjusted for in the denominator.
Comprehensive Income (Loss)	'
	Comprehensive Income (Loss)
	The Company is required to present comprehensive income (loss) and its components in a full set of general-purpose financial statements for all periods presented. Other comprehensive income (loss) is composed of net unrealized holding gains or losses on its available-for-sale investment and mortgage-backed securities portfolio, as well as changes in unrecognized pension cost.
Fair Value Measurements	'
	Fair Value Measurements
	We group our assets at fair value in three levels, based on the markets in which the assets are traded and the reliability of the assumptions used to determine fair value. These levels are:
		•	Level I – Valuation is based upon quoted prices for identical instruments traded in active markets.
		•	Level II – Valuation is based upon quoted prices for similar instruments in active markets, quoted prices for identical or similar instruments in markets that are not active, and model-based valuation techniques for which all significant assumptions are observable in the market.
		•	Level III – Valuation is generated from model-based techniques that use significant assumptions not observable in the market. These unobservable assumptions reflect the Company’s own estimates of assumptions that market participants would use in pricing the asset.
	We base our fair values on the price that would be received to sell an asset or paid to transfer a liability in an orderly transaction between market participants at the measurement date. It is our policy to maximize the use of observable inputs and minimize the use of unobservable inputs when developing fair value measurements, in accordance with the fair value hierarchy in generally accepted accounting principles.
	Fair value measurements for most of our assets are obtained from independent pricing services that we have engaged for this purpose. When available, we, or our independent pricing service, use quoted market prices to measure fair value. If market prices are not available, fair value measurement is based upon models that incorporate available trade, bid, and other market information. Subsequently, all of our financial instruments use either of the foregoing methodologies to determine fair value adjustments recorded to our financial statements. In certain cases, however, when market observable inputs for model-based valuation techniques may not be readily available, we are required to make judgments about assumptions market participants would use in estimating the fair value of financial instruments. The degree of management judgment involved in determining the fair value of financial instrument is dependent upon the availability of quoted market prices or observable market parameters. For financial instruments that trade actively and have quoted market prices or observable market parameters, there is minimal subjectivity involved in measuring fair value. When observable market prices and parameters are not fully available, management judgment is necessary to estimate fair value. In addition, changes in the market conditions may reduce the availability of quoted prices or observable data. When market data is not available, we use valuation techniques requiring more management judgment to estimate the appropriate fair value measurement. Therefore, the results cannot be determined with precision and may not be realized in an actual sale or immediate settlement of the asset. Additionally, there may be inherent weaknesses in any calculation technique, and changes in the underlying assumptions used, including discount rates and estimates of future cash flows, that could significantly affect the results of current or future valuations.
Reclassification of Comparative Amounts	'
	Reclassification of Comparative Amounts
	Certain items previously reported have been reclassified to conform to the current year’s reporting format. Such reclassifications did not affect consolidated net income or consolidated stockholders’ equity.
Recent Accounting Pronouncements	'
	Recent Accounting Pronouncements
	In December 2011, the FASB issued ASU 2011-11, Balance Sheet (Topic 210): Disclosures about Offsetting Assets and Liabilities. The amendments in this Update affect all entities that have financial instruments and derivative instruments that are either (1) offset in accordance with either Section 210-20-45 or Section 815-10-45 or (2) subject to an enforceable master netting arrangement or similar agreement. The requirements amend the disclosure requirements on offsetting in Section 210-20-50. This information will enable users of an entity’s financial statements to evaluate the effect or potential effect of netting arrangements on an entity’s financial position, including the effect or potential effect of rights of setoff associated with certain financial instruments and derivative instruments in the scope of this Update. An entity is required to apply the amendments for annual reporting periods beginning on or after January 1, 2013, and interim periods within those annual periods. An entity should provide the disclosures required by those amendments retrospectively for all comparative periods presented. This Update is not expected to have a significant impact on the Company’s financial statements.
	In October 2012, the FASB issued ASU 2012-06, Business Combinations (Topic 805): Subsequent Accounting for an Indemnification Asset Recognized at the Acquisition Date as a Result of a Government-Assisted Acquisition of a Financial Institution. Update 2012-06 requires that when a reporting entity recognizes an indemnification asset (in accordance with Subtopic 805-20) as a result of a government-assisted acquisition of a financial institution and subsequently a change in the cash flows expected to be collected on the indemnification asset occurs (as a result of a change in cash flows expected to be collected on the assets subject to indemnification), the reporting entity should subsequently account for the change in the measurement of the indemnification asset on the same basis as the change in the assets subject to indemnification. Any amortization of changes in value should be limited to the contractual term of the indemnification agreement (that is, the lesser of the term of the indemnification agreement and the remaining life of the indemnified assets). Update 2012-06 is effective for fiscal years, and interim periods within those years, beginning on or after December 15, 2012. Early adoption is permitted. The amendments should be applied prospectively to any new indemnification assets acquired after the date of adoption and to indemnification assets existing as of the date of adoption arising from a government-assisted acquisition of a financial institution. This Update is not expected to have a significant impact on the Company’s financial statements.
	In January 2013, the FASB issued ASU 2013-01, Balance Sheet (Topic 210): Clarifying the Scope of Disclosures about Offsetting Assets and Liabilities. The amendments clarify that the scope of Update 2011-11 applies to derivatives accounted for in accordance with Topic 815, Derivatives and Hedging, including bifurcated embedded derivatives, repurchase agreements and reverse repurchase agreements, and securities borrowing and securities lending transactions that are either offset in accordance with Section 210-20-45 or Section 815-10-45 or subject to an enforceable master netting arrangement or similar agreement. An entity is required to apply the amendments for fiscal years beginning on or after January 1, 2013, and interim periods within those annual periods. An entity should provide the required disclosures retrospectively for all comparative periods presented. The effective date is the same as the effective date of Update 2011-11. This Update is not expected to have a significant impact on the Company’s financial statements.
	In February 2013, the FASB issued ASU 2013-04, Obligations Resulting from Joint and Several Liability Arrangements for Which the Total Amount of the Obligation Is Fixed at the Reporting Date. The Update requires the measurement of obligations resulting from joint and several liability arrangements for which the total amount of the obligation is fixed at the reporting date as the sum of the amount the reporting entity agreed to pay on the basis of its arrangement with its co-obligors as well as any additional amount that the entity expects to pay on behalf of its co-obligors. The new standard is effective retrospectively for fiscal years and interim periods within those years, beginning after December 15, 2013, and early adoption is permitted. This Update is not expected to have a significant impact on the Company’s financial statements.
	In April 2013, the FASB issued ASU 2013-07, Presentation of Financial Statements (Topic 205): Liquidation Basis of Accounting. The amendments in this Update are being issued to clarify when an entity should apply the liquidation basis of accounting. In addition, the guidance provides principles for the recognition and measurement of assets and liabilities and requirements for financial statements prepared using the liquidation basis of accounting. The amendments require an entity to prepare its financial statements using the liquidation basis of accounting when liquidation is imminent. Liquidation is imminent when the likelihood is remote that the entity will return from liquidation and either (a) a plan for liquidation is approved by the person or persons with the authority to make such a plan effective and the likelihood is remote that the execution of the plan will be blocked by other parties or (b) a plan for liquidation is being imposed by other forces (for example, involuntary bankruptcy). If a plan for liquidation was specified in the entity’s governing documents from the entity’s inception (for example, limited-life entities), the entity should apply the liquidation basis of accounting only if the approved plan for liquidation differs from the plan for liquidation that was specified at the entity’s inception. The amendments are effective for entities that determine liquidation is imminent during annual reporting periods beginning after December 15, 2013, and interim reporting periods therein. Entities should apply the requirements prospectively from the day that liquidation becomes imminent. Early adoption is permitted. Entities that use the liquidation basis of accounting as of the effective date in accordance with other Topics (for example, terminating employee benefit plans) are not required to apply the amendments. Instead, those entities should continue to apply the guidance in those other Topics until they have completed liquidation. This Update is not expected to have a significant impact on the Company’s financial statements.
	In June 2013, the FASB issued ASU 2013-08, Financial Services – Investment Companies (Topic 946): Amendments to the Scope, Measurement, and Disclosure Requirements. The amendments in this Update affect the scope, measurement, and disclosure requirements for investment companies under U.S. GAAP. The amendments do all of the following: 1. Change the approach to the investment company assessment in Topic 946, clarify the characteristics of an investment company, and provide comprehensive guidance for assessing whether an entity is an investment company. 2. Require an investment company to measure noncontrolling ownership interests in other investment companies at fair value rather than using the equity method of accounting. 3. Require the following additional disclosures: (a) the fact that the entity is an investment company and is applying the guidance in Topic 946, (b) information about changes, if any, in an entity’s status as an investment company, and (c) information about financial support provided or contractually required to be provided by an investment company to any of its investees. The amendments in this Update are effective for an entity’s interim and annual reporting periods in fiscal years that begin after December 15, 2013. Earlier application is prohibited. This Update is not expected to have a significant impact on the Company’s financial statements.
	In July 2013, the FASB issued ASU 2013-09, Fair Value Measurement (Topic 820): Deferral of the Effective Date of Certain Disclosures for Nonpublic Employee Benefit Plans in Update 2011-04. The amendments in this Update apply to certain quantitative disclosure requirements for an employee benefit plan, other than those plans that are subject to the Securities and Exchange Commission’s filing requirements (hereafter “nonpublic employee benefit plan”), that holds investments in its plan sponsor’s own nonpublic entity equity securities, including equity securities of its plan sponsor’s nonpublic affiliated entities and that are within the scope of the disclosure requirements contained in FASB Accounting Standards Update 2011-04, Fair Value Measurement (Topic 820): Amendments to Achieve Common Fair Value Measurement and Disclosure Requirements in U.S. GAAP and IFRSs. The amendments in this Update defer indefinitely the effective date of certain required disclosures in Update 2011-04 (Topic 820) of quantitative information about the significant unobservable inputs used in Level 3 fair value measurements for investments held by a nonpublic employee benefit plan in its plan sponsor’s own nonpublic entity equity securities, including equity securities of its plan sponsor’s nonpublic affiliated entities. The amendments in this Update do not defer the effective date for those certain quantitative disclosures for other nonpublic entity equity securities held in the nonpublic employee benefit plan or any qualitative disclosures. The deferral in this amendment is effective upon issuance for financial statements that have not been issued. This Update did not have a significant impact on the Company’s financial statements.
	In July 2013, the FASB issued ASU 2013-10, Derivatives and Hedging (Topic 815): Inclusion of the Fed Funds Effective Swap Rate (or Overnight Index Swap Rate) as a Benchmark Interest Rate for Hedge Accounting Purposes. The amendments in this Update permit the Fed Funds Effective Swap Rate (OIS) to be used as a U.S. benchmark interest rate for hedge accounting purposes under Topic 815, in addition to UST and LIBOR. The amendments also remove the restriction on using different benchmark rates for similar hedges. The amendments are effective prospectively for qualifying new or redesignated hedging relationships entered into on or after July 17, 2013. This Update did not have a significant impact on the Company’s financial statements.
	In July 2013, the FASB issued ASU 2013-11, Income Taxes (Topic 740): Presentation of an Unrecognized Tax Benefit When a Net Operating Loss Carryforward, a Similar Tax Loss, or a Tax Credit Carryforward Exists. This Update applies to all entities that have unrecognized tax benefits when a net operating loss carryforward, a similar tax loss, or a tax credit carryforward exists at the reporting date. An unrecognized tax benefit, or a portion of an unrecognized tax benefit, should be presented in the financial statements as a reduction to a deferred tax asset for a net operating loss carryforward, a similar tax loss, or a tax credit carryforward, except as follows. To the extent a net operating loss carryforward, a similar tax loss, or a tax credit carryforward is not available at the reporting date under the tax law of the applicable jurisdiction to settle any additional income taxes that would result from the disallowance of a tax position or the tax law of the applicable jurisdiction does not require the entity to use, and the entity does not intend to use, the deferred tax asset for such purpose, the unrecognized tax benefit should be presented in the financial statements as a liability and should not be combined with deferred tax assets. The assessment of whether a deferred tax asset is available is based on the unrecognized tax benefit and deferred tax asset that exist at the reporting date and should be made presuming disallowance of the tax position at the reporting date. The amendments in this Update are effective for fiscal years, and interim periods within those years, beginning after December 15, 2013. For nonpublic entities, the amendments are effective for fiscal years, and interim periods within those years, beginning after December 15, 2014. Early adoption is permitted. The amendments should be applied prospectively to all unrecognized tax benefits that exist at the effective date. Retrospective application is permitted. This Update is not expected to have a significant impact on the Company’s financial statements.

Summary_of_Significant_Account2

Summary of Significant Accounting Policies (Tables)	12 Months Ended
	Sep. 30, 2013
Carrying Amount of Goodwill and Intangible Assets	'
	The following tables provide information for the carrying amount of goodwill and intangible assets.
	Goodwill		2013			2012
	Balance at beginning of year		$	8,541		$	40
	Goodwill acquired			276			8,501
	Balance at end of year		$	8,817		$	8,541
	Intangible assets		2013			2012
	Balance at beginning of year		$	3,457		$	1,825
	Intangible assets acquired			—			2,068
	Amortization			(991	)		(436	)
	Balance at end of year		$	2,466		$	3,457
Amortizable Intangible Assets	'
	Amortizable intangible assets were composed of the following:
						September 30,
						2013			2012
			Gross Carrying			Accumulated
			Amount			Amortization
			(dollars in thousands)
	Customer data		$	2,408		$	694		$	283
	Employment obligations			1,620			868			288
			$	4,028		$	1,562		$	571
			2013			2012
	Aggregate amortization expense:
	For the years ended September 30		$	991		$	436
Estimated Amortization Expense	'
	Estimated amortization expense:
	2014		$	870,000
	2015			477,000
	2016			382,000
	2017			267,000
	2018			180,000
	2019			81,000
	2020			81,000
	2021			78,000
	2022			50,000
			$	2,466,000
Activity in Accumulated Other Comprehensive Income	'
	The components of accumulated other comprehensive income (loss), net of tax, as of year-end were as follows:
			2013			2012			2011
	Net unrealized gain on securities available for sale		$	71		$	6,208		$	5,667
	Net unrecognized pension cost			(1,306	)		(4,450	)		(5,081	)
	Total		$	(1,235	)	$	1,758		$	586
Reclassification out of Accumulated Other Comprehensive Income [Member]	'
Activity in Accumulated Other Comprehensive Income	'
	The activity in accumulated other comprehensive income for the years ended September 30, 2013 and 2012, is as follows (in thousands):
			Accumulated Other Comprehensive Income (1)
			Defined			Unrealized Gains			Total
			Benefit			(Losses) on
			Pension			Securities
			Plan			Available for Sale
	Balance at September 30, 2012		$	(4,450	)	$	6,208		$	1,758
	Other comprehensive income before reclassifications			—			(5,643	)		(5,643	)
	Amounts reclassified from accumulated other comprehensive income			3,144			(494	)		2,650
	Period change			3,144			(6,137	)		(2,993	)
	Balance at September 30, 2013		$	(1,306	)	$	71		$	(1,235	)
	Balance at September 30, 2011		$	(5,080	)	$	5,666		$	586
	Other comprehensive income before reclassifications			—			767			767
	Amounts reclassified from accumulated other comprehensive income			631			(226	)		405
	Period change			631			541			1,172
	Balance at September 30, 2012		$	(4,449	)	$	6,207		$	1,758
	(1)	All amounts are net of tax. Related income tax expense or benefit is calculated using an income tax rate approximating 34%.
			Amount Reclassified from
			Accumulated Other Comprehensive
			Income
	Details about Accumulated Other Comprehensive Income Components		For the Year Ended						Affected Line Item
			September 30, (3)						in the Consolidated
	(in thousands)		2013			2012			Statement of Income
	Securities available for sale (1):
	Net securities gains reclassified into earnings		$	749		$	343		Gain on sale of investments, net
	Related income tax expense			(255	)		(117	)	Provision for income taxes
	Net effect on accumulated other comprehensive income for the period			494			226		Net of tax
	Defined benefit pension plan (2):
	Amortization of net loss and prior service costs			(4,763	)		(956	)	Compensation and employee benefits
	Related income tax expense			1,619			325		Provision for income taxes
	Net effect on accumulated other comprehensive income for the period			(3,144	)		(631	)	Net of tax
	Total reclassifications for the period		$	(2,650	)	$	(405	)	Net of tax
	-1	For additional details related to unrealized gains on securities and related amounts reclassified from accumulated other comprehensive income see Note 3, “Investment Securities.”
	-2	Included in the computation of net periodic pension cost. See Note 13, “Employee Benefits” for additional detail.
	-3	Amounts in parenthesis indicate debits.

Earnings_Per_Share_Tables

Earnings Per Share (Tables)	12 Months Ended
	Sep. 30, 2013
Earnings Per Share [Abstract]	'
Composition of the Weighted-Average Common Shares (Denominator) Used in the Basic and Diluted Earnings Per Share Computation	'
	The following table sets forth the composition of the weighted-average common shares (denominator) used in the basic and diluted earnings per share computation for the years ended September 30, 2013, 2012, and 2011.
		2013			2012			2011
	Weighted-average common shares outstanding		18,133,094			17,172,932			16,980,900
	Average treasury stock shares		(5,475,194	)		(4,882,611	)		(4,089,417	)
	Average unearned ESOP shares		(1,063,720	)		(1,109,012	)		(1,154,272	)
	Average unearned nonvested shares		(34,627	)		(130,626	)		(249,296	)
	Weighted-average common shares and common stock equivalents used to calculate basic earnings per share		11,559,553			11,050,683			11,487,915
	Additional common stock equivalents (nonvested stock) used to calculate diluted earnings per share		—			—			—
	Additional common stock equivalents (stock options) used to calculate diluted earnings per share		—			—			—
	Weighted-average common shares and common stock equivalents used to calculate diluted earnings per share		11,559,553			11,050,683			11,487,915

Investment_Securities_Tables

Investment Securities (Tables)	12 Months Ended
	Sep. 30, 2013
Investments Debt And Equity Securities [Abstract]	'
Summary of Amortized Cost and Fair Value of Investment Securities Available for Sale	'
	The amortized cost and fair value of investment securities available for sale are summarized as follows (in thousands):
		2013
				Gross		Gross
		Amortized		Unrealized		Unrealized			Fair
		Cost		Gains		Losses			Value
	Available for sale
	Fannie Mae	$	114,927	$	1,691	$	(1,595	)	$	115,023
	Freddie Mac		60,111		838		(1,252	)		59,697
	Governmental National Mortgage Association securities		39,692		289		(230	)		39,751
	Other mortgage-backed securities		3,385		—		(19	)		3,366
	Total mortgage-backed securities		218,115		2,818		(3,096	)		217,837
	Obligations of states and political subdivisions		23,754		654		(499	)		23,909
	U.S. government agency securities		52,775		225		(480	)		52,520
	Corporate obligations		12,756		186		(169	)		12,773
	Trust-preferred securities		4,943		471		—			5,414
	Other debt securities		1,147		7		—			1,154
	Total debt securities		313,490		4,361		(4,244	)		313,607
	Equity securities—financial services		2,025		—		(10	)		2,015
	Total	$	315,515	$	4,361	$	(4,254	)	$	315,622
		2012
				Gross		Gross
		Amortized		Unrealized		Unrealized			Fair
		Cost		Gains		Losses			Value
	Available for sale
	Fannie Mae	$	111,145	$	4,652	$	(3	)	$	115,794
	Freddie Mac		48,913		1,952		(11	)		50,854
	Governmental National Mortgage Association securities		43,164		803		(16	)		43,951
	Other mortgage-backed securities		5,043		162		—			5,205
	Total mortgage-backed securities		208,265		7,569		(30	)		215,804
	Obligations of states and political subdivisions		18,611		906		—			19,517
	U.S. government agency securities		74,106		379		(1	)		74,484
	Corporate obligations		8,602		146		(91	)		8,657
	Trust-preferred securities		5,852		382		(1	)		6,233
	Other debt securities		1,476		36		—			1,512
	Total debt securities		316,912		9,418		(123	)		326,207
	Equity securities—financial services		3,267		111		—			3,378
	Total	$	320,179	$	9,529	$	(123	)	$	329,585
Schedule of Amortized Cost and Fair Value of Debt Securities by Contractual Maturity	'
	The amortized cost and fair value of debt securities at September 30, 2013, 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		Fair
		Cost		Value
	Due in one year or less	$	3,026	$	3,044
	Due after one year through five years		41,889		42,147
	Due after five years through ten years		65,780		65,847
	Due after ten years		202,795		202,569
	Total	$	313,490	$	313,607

Unrealized_Losses_on_Securitie1

Unrealized Losses on Securities (Tables)	12 Months Ended
	Sep. 30, 2013
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 (in thousands):
		2013
				Less than Twelve Months					Twelve Months or Greater					Total
		Number				Gross					Gross					Gross
		of		Fair		Unrealized			Fair		Unrealized			Fair		Unrealized
		Securities		Value		Losses			Value		Losses			Value		Losses
	Fannie Mae		30	$	47,814	$	(1,589	)	$	1,057	$	(6	)	$	48,871	$	(1,595	)
	Freddie Mac		20		32,781		(1,252	)		—		—			32,781		(1,252	)
	Governmental National Mortgage Association securities		6		10,301		(230	)		—		—			10,301		(230	)
	Other mortgage-backed securities		3		3,366		(19	)		—		—			3,366		(19	)
	Obligations of states and political subdivisions		7		8,064		(499	)		—		—			8,064		(499	)
	U.S. government agency securities		10		30,084		(479	)		999		(1	)		31,083		(480	)
	Corporate obligations		5		5,042		(169	)		—		—			5,042		(169	)
	Equity securities		1		1,990		(10	)		—		—			1,990		(10	)
	Total		82	$	139,442	$	(4,247	)	$	2,056	$	(7	)	$	141,498	$	(4,254	)
		2012
				Less than Twelve Months					Twelve Months or Greater					Total
		Number				Gross					Gross					Gross
		of		Fair		Unrealized			Fair		Unrealized			Fair		Unrealized
		Securities		Value		Losses			Value		Losses			Value		Losses
	Fannie Mae		3	$	4,083	$	(3	)	$	—	$	—		$	4,083	$	(3	)
	Freddie Mac		1		2,002		(11	)		—		—			2,002		(11	)
	Governmental National Mortgage Association securities		5		6,090		(16	)		—		—			6,090		(16	)
	U.S. government agency securities		1		999		(1	)		—		—			999		(1	)
	Corporate obligations		5		1,059		(25	)		1,434		(66	)		2,493		(91	)
	Trust-preferred securities		1		998		(1	)		—		—			998		(1	)
	Total		16	$	15,231	$	(57	)	$	1,434	$	(66	)	$	16,665	$	(123	)

Loans_Receivable_Tables

Loans Receivable (Tables)	12 Months Ended
	Sep. 30, 2013
Receivables [Abstract]	'
Summary of Loans Receivable	'
	Loans receivable consist of the following (in thousands):
		2013			2012
	Real estate loans:
	Residential	$	686,651		$	696,696
	Construction		2,288			3,805
	Commercial		159,469			160,192
	Commercial		10,125			12,818
	Obligations of states and political subdivisions		33,445			33,736
	Home equity loans and lines of credit		41,923			47,925
	Other		2,393			2,485
			936,294			957,657
	Less allowance for loan losses		8,064			7,302
	Net loans	$	928,230		$	950,355
Accounting Adjustments Related to the Purchased Impaired Loans	'
	The table below presents the components of the purchase accounting adjustments related to the purchased impaired loans acquired in the First Star acquisition as of July 31, 2012 (in thousands):
	Unpaid principal balance	$	12,922
	Interest		968
	Contractual cash flows		13,890
	Non-accretable discount		(5,137	)
	Expected cash flows		8,753
	Accretable discount		(1,432	)
	Estimated fair value	$	7,321
Changes in Accretable Yield for Purchased Credit-Impaired Loans	'
	Changes in the accretable yield for purchased credit-impaired loans were as follows, since acquisition, for the periods ended September 30, 2013 and 2012.
	Balance at beginning of period	$	1,098		$	1,432
	Accretion		(1,098	)		(334	)
	Balance at end of period	$	—		$	1,098
Summary of Additional Information Regarding Loans Acquired and Accounted	'
	The following table presents additional information regarding loans acquired and accounted for in accordance with ASC 310-30 (in thousands):
		September 30, 2013			September 30, 2012
		Acquired Loans with Specific			Acquired Loans with Specific
		Evidence or Deterioration in			Evidence or Deterioration in
		Credit Quality (ASC 310-30)			Credit Quality (ASC 310-30)
	Outstanding balance	$	9,371		$	12,527
	Carrying amount		7,131			7,500
Summary of Impaired Loans	'
	Impaired loans for the year ended September 30 are summarized as follows (in thousands):
		2013			2012			2011
	Impaired loans with a related allowance	$	6,160		$	4,368		$	5,630
	Impaired loans without a related allowance		31,066			29,103			12,589
	Related allowance for loan losses		819			952			1,160
	Average recorded balance of impaired loans		37,386			22,393			10,718
	Interest income recognized		860			649			109
Schedule of Loans Evaluated for Impairment	'
	The following table shows the amount of loans in each category that were individually and collectively evaluated for impairment at the dates indicated (in thousands):
								Loans			Collectively
					Individually			Acquired with			Evalauated
		Total			Evaluated			Deteriorated			for
		Loans			for Impairment			Credit Quality			Impairment
	September 30, 2013
	Real estate loans:
	Residential	$	686,651		$	14,018		$	271		$	672,362
	Construction		2,288			—			—			2,288
	Commercial		159,469			15,478			6,355			137,636
	Commercial		10,125			220			502			9,403
	Obligations of states and political subdivisions		33,445			—			—			33,445
	Home equity loans and lines of credit		41,923			379			3			41,541
	Other		2,393			—			—			2,393
	Total	$	936,294		$	30,095		$	7,131		$	899,068
								Loans			Collectively
					Individually			Acquired with			Evalauated
		Total			Evaluated			Deteriorated			for
		Loans			for Impairment			Credit Quality			Impairment
	September 30, 2012
	Real estate loans:
	Residential	$	696,696		$	7,942		$	271		$	688,483
	Construction		3,805			—			—			3,805
	Commercial		160,192			17,415			6,159			136,618
	Commercial		12,818			423			1,007			11,388
	Obligations of states and political subdivisions		33,736			—			—			33,736
	Home equity loans and lines of credit		47,925			191			44			47,690
	Other		2,485			—			19			2,466
	Total	$	957,657		$	25,971		$	7,500		$	924,186
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. Also presented are the average recorded investments in the impaired loans and the related amount of interest recognized during the time within the period that the impaired loans were impaired (in thousands).
					Unpaid						Average			Interest
		Recorded			Principal			Associated			Recorded			Income
		Investment			Balance			Allowance			Investment			Recognized
	September 30, 2013
	With no specific allowance recorded:
	Real estate loans:
	Residential	$	11,251		$	11,245		$	—		$	9,716		$	159
	Construction		—			—			—			—			—
	Commercial		18,711			18,723			—			20,751			615
	Commercial		722			722			—			1,034			9
	Obligations of states and political subdivisions		—			—			—			—			—
	Home equity loans and lines of credit		382			382			—			373			3
	Other		—			—			—			18			—
	Subtotal		31,066			31,072			—			31,892			786
	With an allowance recorded:
	Real estate loans:
	Residential		3,038			3,041			518			2,655			74
	Construction		—			—			—			—			—
	Commercial		3,122			3,123			301			2,839			—
	Commercial		—			—			—			—			—
	Obligations of states and political subdivisions		—			—			—			—			—
	Home equity loans and lines of credit		—			—			—			—			—
	Other		—			—			—			—			—
	Subtotal		6,160			6,164			819			5,494			74
	Total:
	Real estate loans:
	Residential		14,289			14,286			518			12,371			233
	Construction		—			—			—			—			—
	Commercial		21,833			21,846			301			23,590			615
	Commercial		722			722			—			1,034			9
	Obligations of states and political subdivisions		—			—			—			—			—
	Home equity loans and lines of credit		382			382			—			373			3
	Other		—			—			—			18			—
	Total	$	37,226		$	37,236		$	819		$	37,386		$	860
					Unpaid						Average			Interest
		Recorded			Principal			Associated			Recorded			Income
		Investment			Balance			Allowance			Investment			Recognized
	September 30, 2012
	With no specific allowance recorded:
	Real estate loans:
	Residential	$	5,182		$	5,177		$	—		$	4,687		$	82
	Construction		—			—			—			—			—
	Commercial		22,290			22,341			—			13,584			457
	Commercial		1,386			1,385			—			581			28
	Obligations of states and political subdivisions		—			—			—			—			—
	Home equity loans and lines of credit		226			226			—			238			—
	Other		19			19			—			25			—
	Subtotal		29,103			29,148			—			19,115			567
	With an allowance recorded:
	Real estate loans:
	Residential		3,031			3,030			661			1,892			68
	Construction		—			—			—			—			—
	Commercial		1,284			1,286			270			1,326			13
	Commercial		44			44			12			47			—
	Obligations of states and political subdivisions		—			—			—			—			—
	Home equity loans and lines of credit		9			9			9			13			1
	Other		—			—			—			—			—
	Subtotal		4,368			4,369			952			3,278			82
	Total:
	Real estate loans:
	Residential		8,213			8,207			661			6,579			150
	Construction		—			—			—			—			—
Commercial		23,574			23,627			270			14,910			470
Commercial		1,430			1,429			12			628			28
Obligations of states and political subdivisions		—			—			—			—			—
Home equity loans and lines of credit		235			235			9			251			1
Other		19			19			—			25			—
Total	$	33,471		$	33,517		$	952		$	22,393		$	649
Classes of the Loan Portfolio, Internal Risk Rating System	'
	The following table presents the classes of the loan portfolio summarized by the aggregate Pass and the criticized categories of Special Mention, Substandard, and Doubtful within the internal risk rating system as of September 30, 2013 and 2012 (in thousands):
					Special
		Pass			Mention			Substandard			Doubtful			Total
	September 30, 2013
	Commercial real estate loans	$	129,799		$	9,440		$	20,230		$	—		$	159,469
	Commercial		9,466			436			223			—			10,125
	Obligations of states and political subdivisions		33,445			—			—			—			33,445
	Total	$	172,710		$	9,876		$	20,453		$	—		$	203,039
					Special
		Pass			Mention			Substandard			Doubtful			Total
	September 30, 2012
	Commercial real estate loans	$	132,841		$	5,502		$	21,849		$	—		$	160,192
	Commercial		12,035			360			423			—			12,818
	Obligations of states and political subdivisions		33,736			—			—			—			33,736
	Total	$	178,612		$	5,862		$	22,272		$	—		$	206,746
Schedule of Performing or Nonperforming Loans	'
	The following table presents the recorded investment in the loan classes based on payment activity as of September 30, 2013 and September 30, 2012 (in thousands):
		Performing			Nonperforming			Total
	September 30, 2013
	Real estate loans:
	Residential	$	675,706		$	10,945		$	686,651
	Construction		2,288			—			2,288
	Home equity loans and lines of credit		41,584			339			41,923
	Other		2,393			—			2,393
	Total	$	721,971		$	11,284		$	733,255
		Performing			Nonperforming			Total
	September 30, 2012
	Real estate loans:
	Residential	$	686,160		$	10,536		$	696,696
	Construction		3,805			—			3,805
	Home equity loans and lines of credit		47,552			373			47,925
	Other		2,466			19			2,485
	Total	$	739,983		$	10,928		$	750,911
Classes of the Loan Portfolio Summarized by the Aging Categories	'
	The following table presents the classes of the loan portfolio summarized by the aging categories of performing loans and nonaccrual loans as of September 30, 2013 and 2012 (in thousands):
					31-60			61-90			Greater than
					Days			Days			90 Days			Non		Total			Total
		Current			Past Due			Past Due			Past Due			Accrual		Past Due			Loans
	September 30, 2013
	Real estate loans:
	Residential	$	671,850		$	2,866		$	990		$	—		$	10,945	$	14,801		$	686,651
	Construction		2,288			—			—			—			—		—			2,288
	Commercial		146,062			2,589			—			—			10,818		13,407			159,469
	Commercial		8,948			—			—			—			1,177		1,177			10,125
	Obligations of states and political subdivisions		33,445			—			—			—			—		—			33,445
	Home equity loans and lines of credit		41,380			127			77			—			339		543			41,923
	Other		2,336			57			—			—			—		57			2,393
	Total	$	906,309		$	5,639		$	1,067		$	—		$	23,279	$	29,985		$	936,294
					31-60			61-90			Greater than
					Days			Days			90 Days			Non		Total			Total
		Current			Past Due			Past Due			Past Due			Accrual		Past Due			Loans
	September 30, 2012
	Real estate loans:
	Residential	$	681,222		$	3,664		$	1,274		$	—		$	10,536	$	15,474		$	696,696
	Construction		3,805			—			—			—			—		—			3,805
	Commercial		142,277			3,658			3,348			—			10,909		17,915			160,192
	Commercial		10,948			—			—			—			1,870		1,870			12,818
	Obligations of states and political subdivisions		33,736			—			—			—			—		—			33,736
	Home equity loans and lines of credit		46,967			447			138			—			373		958			47,925
	Other		2,452			14			—			—			19		33			2,485
	Total	$	921,407		$	7,783		$	4,760		$	—		$	23,707	$	36,250		$	957,657
Summary of Primary Segments of ALL	'
	The following table summarizes the primary segments of the ALL, segregated into the amount required for loans individually evaluated for impairment and the amount required for loans collectively evaluated for impairment as of September 30, 2013 (in thousands):
		Real												Obligations of		Home Equity
		Estate												States and		Loans and
		Loans												Political		Lines of
		Residential			Construction			Commercial			Commercial			Subdivisions		Credit			Other			Unallocated			Total
	ALL balance at September 30, 2011	$	5,220		$	8		$	1,255		$	500		$	74	$	622		$	80		$	411		$	8,170
	Charge-offs		(2,366	)		—			(987	)		(31	)		—		(393	)		—			—			(3,777	)
	Recoveries		291			—			7			26			—		35			—			—			359
	Provision		2,256			21			424			(21	)		53		235			(58	)		(360	)		2,550
	ALL balance at September 30, 2012	$	5,401		$	29		$	699		$	474		$	127	$	499		$	22		$	51		$	7,302
	September 30, 2012	$	5,401		$	29		$	699		$	474		$	127	$	499		$	22		$	51		$	7,302
	Charge-offs		(2,401	)		—			(403	)		—			—		(243	)		(6	)		—			(3,053	)
	Recoveries		50			—			2			—			—		13			—			—			65
	Provision		2,737			(9	)		648			(137	)		3		161			5			342			3,750
	ALL balance at September 30, 2013	$	5,787		$	20		$	946		$	337		$	130	$	430		$	21		$	393		$	8,064
	Individually evaluated for impairment	$	518		$	—		$	301		$	—		$	—	$	—		$	—		$	—		$	819
	Collectively evaluated for impairment		5,269			20			645			337			130		430			21			393			7,245
	ALL balance at September 30, 2013	$	5,787		$	20		$	946		$	337		$	130	$	430		$	21		$	393		$	8,064
	Individually evaluated for impairment	$	661		$	—		$	270		$	12		$	—	$	9		$	—		$	—		$	952
	Collectively evaluated for impairment		4,740			29			429			462			127		490			22			51			6,350
	ALL balance at September 30, 2012	$	5,401		$	29		$	699		$	474		$	127	$	499		$	22		$	51		$	7,302
Summary of Troubled Debt Restructuring Granted	'
	The following is a summary of troubled debt restructurings granted during the periods indicated (in thousands).
		For the Year Ended September 30, 2013
					Pre-Modification			Post-Modification
					Outstanding			Outstanding
		Number of			Recorded			Recorded
		Contracts			Investment			Investment
	Troubled debt restructurings
	Real estate loans:
	Residential		12		$	1,578		$	1,578
	Construction		—			—			—
	Commercial		—			—			—
	Commercial		—			—			—
	Obligations of states and political subdivisions
	Home equity loans and lines of credit		1			98			98
	Other		—			—			—
	Total		13		$	1,676		$	1,676
		For the Year Ended September 30, 2012
					Pre-Modification			Post-Modification
					Outstanding			Outstanding
		Number of			Recorded			Recorded
		Contracts			Investment			Investment
	Troubled debt restructurings
	Real estate loans:
	Residential		20		$	3,365		$	3,281
	Construction		—			—			—
	Commercial		10			3,165			3,102
	Commercial		3			217			162
	Obligations of states and political subdivisions
	Home equity loans and lines of credit		2			5			4
	Other		—			—			—
	Total		35		$	6,752		$	6,549
Summary of Troubled Debt Restructurings Subsequently Defaulted within One Year of Modification	'
	The following is a summary of troubled debt restructurings that have subsequently defaulted within one year of modification (in thousands).
		For the Year Ended September 30, 2012
		Number of			Recorded
		Contracts			Investment
	Troubled debt restructurings
	Real estate loans:
	Residential		—		$	—
	Construction		—			—
	Commercial		1			41
	Commercial		1			31
	Obligations of states and political subdivisions
	Home equity loans and lines of credit		—			—
	Other		—			—
	Total		2		$	72

Premises_and_Equipment_Tables

Premises and Equipment (Tables)	12 Months Ended
	Sep. 30, 2013
Property Plant And Equipment [Abstract]	'
Composition of Premises and Equipment	'
	Premises and equipment consist of the following (in thousands):
		2013			2012
	Land and land improvements	$	5,930		$	5,001
	Buildings and leasehold improvements		14,102			14,772
	Furniture, fixtures, and equipment		9,549			9,003
	Construction in process		15			234
			29,596			29,010
	Less accumulated depreciation		(13,849	)		(12,840	)
	Total	$	15,747		$	16,170

Deposits_Tables

Deposits (Tables)	12 Months Ended
	Sep. 30, 2013
Banking And Thrift [Abstract]	'
Schedule of Deposits and Respective Weighted-Average Interest Rates by Major Classifications	'
	Deposits and their respective weighted-average interest rates consist of the following major classifications (in thousands):
		2013					2012
		Weighted-					Weighted-
		Average					Average
		Interest Rate			Amount		Interest Rate			Amount
	Noninterest-bearing demand accounts		—	%	$	58,795		—	%	$	41,767
	NOW accounts		0.04			99,857		0.05			109,923
	Money market accounts		0.2			138,049		0.3			155,666
	Savings and club accounts		0.05			110,189		0.06			102,143
	Certificates of deposit		1.26			634,169		1.46			586,135
	Total		0.8	%	$	1,041,059		0.92	%	$	995,634
		2013					2012
		Weighted-					Weighted-
		Average					Average
		Interest Rate			Amount		Interest Rate			Amount
	Certificates of deposit:
	0.00 - 2.00%		0.84	%	$	496,310		0.93	%	$	423,426
	2.01 - 4.00%		2.71			133,579		2.72			150,692
	4.01 - 6.00%		4.55			4,280		4.46			12,017
	Total		1.26	%	$	634,169		1.46	%	$	586,135
Scheduled Maturities of Certificates of Deposit	'
	At September 30 scheduled maturities of certificates of deposit are as follows (in thousands):
	Within three months	$	129,805
	Three through six months		97,656
	Six through twelve months		84,691
	Over twelve months		322,017
	Total	$	634,169
Scheduled Maturities of Certificates of Deposit in Denominations	'
	The scheduled maturities of certificates of deposit in denominations of $100,000 or more as of September 30, 2013, are as follows (in thousands):
	Within three months	$	82,817
	Three through six months		71,392
	Six through twelve months		43,247
	Over twelve months		246,407
	Total	$	443,863
Summary of Interest Expense on Deposits	'
	A summary of interest expense on deposits for the years ended September 30 is as follows (in thousands):
		2013			2012		2011
	NOW accounts	$	51		$	24	$	25
	Money market accounts		327			326		551
	Savings and club accounts		51			80		156
	Certificates of deposits		6,979			7,056		6,754
	Total	$	7,408		$	7,486	$	7,486

ShortTerm_Borrowings_Tables

Short-Term Borrowings (Tables)	12 Months Ended
	Sep. 30, 2013
Debt Disclosure [Abstract]	'
Schedule of Short-Term Borrowings	'
	The following table sets forth information concerning short-term borrowings (in thousands):
		2013			2012			2011
	Balance at year-end	$	23,000		$	43,281		$	4,000
	Maximum amount outstanding at any month-end		84,500			43,281			28,086
	Average balance outstanding during the year		45,792			11,712			6,439
	Weighted-average interest rate:
	As of year-end		0.29	%		0.3	%		0.22	%
	Paid during the year		0.28	%		0.27	%		0.71	%

Other_Borrowings_Tables

Other Borrowings (Tables)	12 Months Ended
	Sep. 30, 2013
Debt Disclosure [Abstract]	'
Contractual Maturities of FHLB Long-Term Advances and Securities Sold under Agreements to Repurchase	'
	The following table presents contractual maturities of FHLB long-term advances and securities sold under agreements to repurchase (in thousands):
							Weighted-			Stated Interest
		Maturity Range					Average			Rate Ranged
	Description	From		To			Interest Rate			From			To			2013		2012
	Convertible		12/5/18		12/5/18			3.3	%		3.3	%		3.3	%	$	5,000	$	5,000
	Fixed rate		11/19/13		9/21/20			1.9			0.63			4.1			107,260		133,960
	Mid-term		5/12/14		3/4/16			0.71			0.46			0.87			7,000		7,500
	Securities sold under agreements to repurchase		1/12/14		4/6/14			2.75			2.63			2.86			10,000		45,000
	Total															$	129,260	$	191,460
Maturities of FHLB Long-Term Advances and Securities Sold under Agreements to Repurchase	'
	Maturities of FHLB long-term advances and securities sold under agreements to repurchase are summarized as follows (in thousands):
	Year Ending			Weighted-
	September 30,	Amount		Average Rate
	2014	$	33,710		2.74	%
	2015		10,300		2.26
	2016		28,300		1.41
	2017		23,250		1.41
	2018		20,000		1.64
	2019 and thereafter		13,700		2.3
	Total	$	129,260		1.95	%

Income_Taxes_Tables

Income Taxes (Tables)	12 Months Ended
	Sep. 30, 2013
Income Tax Disclosure [Abstract]	'
Schedule of Provision for Income Taxes	'
	The provision for income taxes consists of (in thousands):
		2013			2012			2011
	Current:
	Federal	$	1,646		$	(1,807	)	$	2,130
	State		—			15			7
	Total current taxes		1,646			(1,792	)		2,137
	Deferred income tax benefit		1,188			1,825			(274	)
	Total income tax provision	$	2,834		$	33		$	1,863
	Total
Schedule of Changes in Significant Portions of the Deferred Tax Assets and Deferred Tax Liabilities	'
	The tax effects of deductible and taxable temporary differences that gave rise to significant portions of the deferred tax assets and deferred tax liabilities are as follows (in thousands):
		2013			2012
	Deferred tax assets:
	Allowance for loan losses	$	2,742		$	2,515
	Charitable contributions carryover		—			12
	Employee benefit plan		673			2,292
	Investment losses subject to Section 382 limitation		5,622			5,895
	Purchase accounting adjustment		789			2,287
	Other		4,232			3,447
	Total gross deferred tax assets		14,058			16,448
	Deferred tax liabilities:
	Pension plan		1,137			1,197
	Net unrealized gain on securities		36			3,198
	Mortgage servicing rights		131			125
	Premises and equipment		462			175
	Other		601			417
	Total gross deferred tax liabilities		2,367			5,112
	Net deferred tax assets	$	11,691		$	11,336
Schedule of Reconciliation of the Federal Statutory Rate and the Effective Income Tax Rate	'
	The reconciliation of the federal statutory rate and the Company’s effective income tax rate is as follows (in thousands):
		2013						2012						2011
		Amount			% of			Amount			% of			Amount			% of
					Pretax						Pretax						Pretax
					Income						Income						Income
	Provision at statutory rate	$	3,963			34	%	$	84			34	%	$	2,421			34	%
	Valuation allowance		—			—			247			99.6			39			0.5
	Income from bank-owned life insurance		(322	)		(2.8	)		(274	)		(110.7	)		(217	)		(3.0	)
	Tax-exempt income		(388	)		(3.3	)		(310	)		(125.5	)		(371	)		(5.2	)
	Low-income housing credits		(289	)		(2.5	)		(195	)		(78.7	)		(175	)		(2.5	)
	Nondeductible merger expenses		—			—			163			65.8			—			—
	Other, net		(130	)		(1.1	)		318			128.8			166			2.3
	Actual tax expense and effective rate	$	2,834			24.3	%	$	33			13.3	%	$	1,863			26.1	%

Commitments_Tables

Commitments (Tables)	12 Months Ended
	Sep. 30, 2013
Commitments And Contingencies Disclosure [Abstract]	'
Components of Off Balance Sheet Commitments	'
	The off-balance sheet commitments consist of the following (in thousands):
		2013		2012
	Commitments to extend credit	$	22,333	$	21,461
	Standby letters of credit		4,769		3,244
	Unfunded lines of credit		42,016		38,750

Lease_Commitments_and_Total_Re1

Lease Commitments and Total Rental Expense (Tables)	12 Months Ended
	Sep. 30, 2013
Text Block [Abstract]	'
Future Minimum Lease Payments By Year and in the Aggregate	'
	Future minimum lease payments by year and in the aggregate, under noncancellable operating leases with initial or remaining terms of one year or more, consisted of the following at September 30, 2013 (in thousands):
	2014	$	524
	2015		451
	2016		391
	2017		230
	2018		128
	2019 and beyond		1,151
	Total	$	2,875

Employee_Benefits_Tables

Employee Benefits (Tables)	12 Months Ended
	Sep. 30, 2013
Postemployment Benefits [Abstract]	'
Components of the ESOP Shares	'
	The following table presents the components of the ESOP shares:
		2013			2012
	Allocated shares		271,694			226,412
	Shares committed to be released		33,962			33,962
	Unreleased shares		1,052,816			1,098,098
	Total ESOP shares		1,358,472			1,358,472
	Fair value of unreleased shares (in thousands)	$	10,970		$	11,409
Schedule of Stock Option Activity	'
	The following is a summary of the Company’s stock option activity and related information for its option plan for the year ended September 30, 2013.
		Number of			Weighted-			Weighted-			Aggregate
		Stock Options			Average			Average			Intrinsic
					Exercise			Remaining			Value
					Price			Contractual			(in thousands)
								Term (in years)
	Outstanding, September 30, 2012		1,458,379		$	12.35			5.67		$	—
	Granted		—			—			—			—
	Exercised		—			—			—			—
	Forfeited		—			—			—			—
	Outstanding, September 30, 2013		1,458,379			12.35			4.67			—
	Exercisable at year-end		1,458,379			12.35			4.67			—
Schedule of Restricted Stock Option Activity	'
	The following is a summary of the status of the Company’s restricted stock as of September 30, 2013, and changes therein during the year then ended:
		Number of			Weighted-
		Restricted			Average
		Stock			Grant Date
					Fair Value
	Nonvested at September 30, 2012		115,212		$	12.35
	Granted		30,000			10.94
	Vested		(130,217	)		12.19
	Forfeited		—			—
	Nonvested at September 30, 2013		14,995			10.94
Summary of Change in Plan Assets and Benefit Obligation	'
	The following table sets forth the change in plan assets and benefit obligation at September 30 (in thousands):
		2013			2012
	Change in benefit obligation:
	Benefit obligation at beginning of year	$	17,264		$	15,024
	Service cost		702			597
	Interest cost		716			713
	Actuarial gains		(3,588	)		1,043
	Benefits paid		(97	)		(113	)
	Benefit obligation at end of year		14,997			17,264
	Change in plan assets:
	Fair value of plan assets at beginning of year		14,042			11,457
	Actual return on plan assets		1,818			2,338
	Contributions		600			360
	Benefits paid		(97	)		(113	)
	Fair value of plan assets at end of year		16,363			14,042
	Funded status	$	1,366		$	(3,222	)
Summary of the Components of Net Periodic Pension Cost	'
	Amounts not yet recognized as a component of net periodic pension cost (in thousands):
		2013			2012			2011
	Amounts recognized in accumulated other comprehensive income consist of:
	Net gain	$	1,979		$	6,742		$	7,697
	Prior service cost		—			—			—
	Total	$	1,979		$	6,742		$	7,697
Summary of the Components of Net Periodic Benefit Cost	'
	The following table comprises the components of net periodic benefit cost for the years ended September 30 (in thousands):
		2013			2012			2011
	Service cost	$	702		$	598		$	533
	Interest cost		716			713			698
	Expected return on plan assets		(1,034	)		(814	)		(769	)
	Amortization of prior service cost		—			—			8
	Amortization of unrecognized loss		392			475			404
	Net periodic benefit cost	$	776		$	972		$	874
Schedule of Weighted-Average Assumptions	'
	Weighted-average assumptions used to determine benefit obligations:
		2013			2012
	Discount rate		5.1	%		4.15	%
	Rate of compensation increase		4			4
Schedule of Assumptions Used to Determine Net Periodic Benefit Cost	'
	Weighted-average assumptions used to determine net periodic benefit cost for the years ended:
		2013			2012			2011
	Discount rate		4.15	%		4.75	%		5.25	%
	Expected long-term return on plan assets		7			7			7
	Rate of compensation increase		4			5			5
Summary of the Plan's Financial Assets at Fair Value, within the Fair Value Hierarchy	'
	The following tables set forth by level, within the fair value hierarchy, the plan’s financial assets at fair value as of September 30, 2013 and 2012 (in thousands):
		30-Sep-13
		Level I			Level II			Level III			Total
	Assets:
	Investment in collective trusts
	Fixed income	$	—		$	5,722		$			$	5,722
	Equity		—			10,631						10,631
	Investment in short-term investments		—			10						10
	Total assets at fair value	$	—		$	16,363		$	—		$	16,363
		September 30, 2012
		Level I			Level II			Level III			Total
	Assets:
	Investment in collective trusts
	Fixed income	$	—		$	4,884		$			$	4,884
	Equity		—			9,142						9,142
	Investment in short-term investments		—			16						16
	Total assets at fair value	$	—		$	14,042		$	—		$	14,042
The Bank's Defined Benefit Pension Plan Weighted-Average Asset Allocations	'
	The Bank’s defined benefit pension plan weighted-average asset allocations at September 30, by asset category, are as follows:
	Asset Category	2013			2012
	Cash and fixed income securities		35	%		34.8	%
	Equity securities		64.9			65.1
	Other		0.1			0.1
	Total		100	%		100	%
Summary of Estimated Future Benefit Payments	'
	Estimated future benefit payments, which reflect expected future service, as appropriate, are as follows (in thousands):
	2014	$	72
	2015		79
	2016		85
	2017		108
	2018		298
	2019-2023		3,963

Regulatory_Capital_Requirement1

Regulatory Capital Requirements (Tables)	12 Months Ended
	Sep. 30, 2013
Banking And Thrift [Abstract]	'
Reconciliation of Bank's Capital Under U.S. Generally Accepted Accounting Principles to Regulatory Capital	'
	The following table reconciles the Bank’s capital under U.S. generally accepted accounting principles to regulatory capital (in thousands):
		2013			2012
	Total stockholders’ equity	$	161,701		$	168,676
	Accumulated other comprehensive (income) loss		1,235			(1,702	)
	Unrealized loss on equity securities		(10	)		—
	Goodwill and certain other intangible assets		(10,930	)		(11,812	)
	Disallowed servicing assets		(37	)		(36	)
	Tier I, core, and tangible capital		151,959			155,126
	Allowance for loan losses		7,297			6,402
	Unrealized gains on equity securities		—			4
	Total risk-based capital	$	159,256		$	161,532
The Bank's Actual Capital Ratios	'
	The Bank’s actual capital ratios are presented in the following table (in thousands):
		2013						2012
		Amount			Ratio			Amount		Ratio
	Total Capital
	(to Risk-Weighted Assets)
	Actual	$	159,256			20.4	%	$	161,532		19.6	%
	For Capital Adequacy Purposes		62,603			8			65,962		8
	To Be Well Capitalized		78,254			10			82,453		10
	Tier I Capital
	(to Risk-Weighted Assets)
	Actual	$	151,959			19.4	%	$	155,126		18.8	%
	For Capital Adequacy Purposes		31,301			4			32,981		4
	To Be Well Capitalized		46,952			6			49,972		6
	Tier I Capital
	(to Adjusted Assets)
	Actual	$	151,959			11.2	%	$	155,126		11.1	%
	For Capital Adequacy Purposes		54,337			4			56,001		4
	To Be Well Capitalized		67,921			5			70,002		5

Fair_Value_Measurements_Tables

Fair Value Measurements (Tables)	12 Months Ended
	Sep. 30, 2013
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 September 30, 2013 and 2012, and indicates the fair value hierarchy of the valuation techniques utilized by the Company to determine such fair value:
			September 30, 2013
			Level I		Level II			Level III		Total
	Assets measured at fair value on a recurring basis:
	Investment securities available for sale:
	Mortgage-backed securities		$	—	$	217,837		$	—	$	217,837
	Obligations of states and political subdivisions			—		23,909			—		23,909
	U.S. government agency securities			—		52,520			—		52,520
	Corporate obligations			—		12,773			—		12,773
	Trust-preferred securities			—		3,614			1,800		5,414
	Other debt securities			—		1,154			—		1,154
	Equity securities - financial services			2,015		—			—		2,015
	Total securities			2,015		311,807			1,800		315,622
	Assets measured at fair value on a nonrecurring basis:
	Foreclosed real estate owned			—		—			2,111		2,111
	Impaired loans			—		—			36,407		36,407
			30-Sep-12
			Level I		Level II			Level III		Total
	Assets measured at fair value on a recurring basis:
	Investment securities available for sale
	Mortgage-backed securities		$	—	$	215,804		$	—	$	215,804
	Obligations of states and political subdivisions			—		19,517			—		19,517
	U.S. government agency securities			—		74,484			—		74,484
	Corporate obligations			—		8,657			—		8,657
	Trust-preferred securities			—		4,493			1,740		6,233
	Other debt securities			—		1,512			—		1,512
	Equity securities - financial services			3,378		—			—		3,378
	Total securities			3,378		324,467			1,740		329,585
	Assets measured at fair value on a nonrecurring basis:
	Foreclosed real estate owned			—		—			2,998		2,998
	Impaired loans			—		—			32,520		32,520
Schedule of Changes in Fair Value of Level III Investments	'
	The following table presents a summary of changes in the fair value of the Company’s Level III investments for the years ended September 30, 2013 and 2012 (in thousands).
			Fair Value Measurement Using
			Significant Unobservable Inputs
			(Level III)
			September 30, 2013		September 30, 2012
	Beginning balance		$	1,740	$	—
	Purchases, sales, issuances, settlements, net			—		1,528
	Total unrealized gain:
	Included in earnings			—		—
	Included in other comprehensive income			60		212
	Transfers in and/or out of Level III			—		—
			$	1,800	$	1,740
Summary of Additional Quantitative Information about Assets Measured at Fair Value on a Nonrecurring Basis	'
	The following table presents additional quantitative information about assets measured at fair value on a nonrecurring basis and for which the Company has utilized Level III inputs to determine fair value:
			Quantitative Information About Level III Fair Value Measurements
			Fair Value		Valuation		Unobservable
			Estimate		Techniques		Input	Range
	September 30, 2013
	Impaired loans		$	36,407	Appraisal of		Appraisal	0% to 30%
					collateral (1)		adjustments (2)
	Foreclosed real estate owned			2,111	Appraisal of		Appraisal	0% to 30%
					collateral (1), (3)		adjustments (2)
	September 30, 2012
	Impaired loans		$	32,520	Appraisal of		Appraisal	0% to 30%
					collateral (1)		adjustments (2)
	Foreclosed real estate owned			2,998	Appraisal of		Appraisal	0% to 30%
					collateral (1), (3)		adjustments (2)
	-1	Fair value is generally determined through independent appraisals of the underlying collateral, which generally include various Level III inputs which are not identifiable.
	-2	Appraisals may be adjusted by management for qualitative factors such as economic conditions and estimated liquidation expenses. The range of liquidation expenses and other appraisal adjustments is presented as a percent of the appraisal.
	-3	Includes qualitative adjustments by management and estimated liquidation expenses.

Fair_Value_of_Financial_Instru1

Fair Value of Financial Instruments (Tables)	12 Months Ended
	Sep. 30, 2013
Text Block [Abstract]	'
Schedule of Fair Values of the Company's Financial Instruments	'
		September 30, 2013
		Carrying								Total
		Value		Level I		Level II		Level III		Fair Value
	Financial assets:
	Cash and cash equivalents	$	26,648	$	26,648	$	—	$	—	$	26,648
	Investment and mortgage-backed securities available for sale		315,622		2,015		311,807		1,800		315,622
	Loans receivable, net		928,230		—		—		951,120		951,120
	Accrued interest receivable		4,413		4,413		—		—		4,413
	Regulatory stock		9,415		9,415		—		—		9,415
	Mortgage servicing rights		382		—		—		382		382
	Bank-owned life insurance		28,797		28,797		—		—		28,797
	Financial liabilities:
	Deposits	$	1,041,059	$	406,890	$	—	$	638,510	$	1,045,400
	Short-term borrowings		23,000		23,000		—		—		23,000
	Other borrowings		129,260		—				124,504		124,504
	Advances by borrowers for taxes and insurance		4,962		4,962		—		—		4,962
	Accrued interest payable		833		833		—		—		833
		September 30, 2012
		Carrying								Total
		Value		Level I		Level II		Level III		Fair Value
	Financial assets:
	Cash and cash equivalents	$	15,550	$	15,550	$	—	$	—	$	15,550
	Investment and mortgage-backed securities available for sale		329,585		3,378		324,467		1,740		329,585
	Loans receivable, net		950,355		—		—		997,685		997,685
	Accrued interest receivable		4,929		4,929		—		—		4,929
	Regulatory stock		21,914		21,914		—		—		21,914
	Mortgage servicing rights		365		—		—		365		365
	Bank-owned life insurance		27,848		27,848		—		—		27,848
	Financial liabilities:
	Deposits	$	995,634	$	409,499	$	597,028	$	—	$	1,006,527
	Short-term borrowings		43,281		43,281		—		—		43,281
	Other borrowings		191,460		—		195,636		—		195,636
	Advances by borrowers for taxes and insurance		3,432		3,432		—		—		3,432
	Accrued interest payable		1,128		1,128		—		—		1,128

Parent_Company_Tables

Parent Company (Tables)	12 Months Ended
	Sep. 30, 2013
Condensed Financial Information Of Parent Company Only Disclosure [Abstract]	'
Condensed Balance Sheet	'
	CONDENSED BALANCE SHEET
		September 30,
		2013			2012
	ASSETS
	Cash and due from banks	$	3,195		$	3,650
	Certificates of deposit		17			16
	Investment securities available for sale		25			1,280
	Investment in subsidiary		161,701			168,082
	Premises and equipment, net		1,152			1,727
	Other assets		1,211			1,505
	TOTAL ASSETS	$	167,301		$	176,260
	LIABILITIES AND STOCKHOLDERS’ EQUITY
	Other liabilities	$	855		$	849
	Stockholders’ equity		166,446			175,411
	TOTAL LIABILITIES AND STOCKHOLDERS’ EQUITY	$	167,301		$	176,260
Condensed Statement of Income	'
	CONDENSED STATEMENT OF INCOME
		Year Ended September 30,
		2013			2012			2011
	INCOME
	Interest income	$	408		$	403		$	473
	Net gains on sale of investments		30			—			99
	Dividends		15,000			25,000			10,000
	Total income		15,438			25,403			10,572
	EXPENSES
	Interest expense		—			101			—
	Professional fees		505			1,741			303
	Other		527			132			63
	Total expenses		1,032			1,974			366
	Income before income tax expense		14,406			23,429			10,206
	Income tax expense (benefit)		—			(32	)		94
	Income before equity in undistributed net earnings of subsidiary		14,406			23,461			10,112
	Equity in undistributed net earnings of subsidiary		(5,583	)		(23,246	)		(4,854	)
	NET INCOME	$	8,823		$	215		$	5,258
Condensed Statement of Cash Flows	'
					September 30,
		2013			2012			2011
	OPERATING ACTIVITIES
	Net income	$	8,823		$	215		$	5,258
	Adjustments to reconcile net income to net cash provided by operating activities:
	Equity in undistributed net earnings of subsidiary		5,583			23,246			4,854
	Net gain on sale of investments		(30	)		—			(99	)
	(Decrease) increase in accrued income taxes		(12	)		1,254			56
	Decrease in accrued interest receivable		8			8			117
	Deferred federal income taxes		(29	)		576			(91	)
	Other, net		798			(1,362	)		186
	Net cash provided by operating activities		15,141			23,937			10,281
	INVESTING ACTIVITIES
	Business acquisitions		—			(12,306	)		—
	Proceeds from principal repayment, maturities, and sales		1,200			—			9,788
	Net cash provided by (used for) investing activities		1,200			(12,306	)		9,788
	FINANCING ACTIVITIES
	Repayment of trust-preferred debt		—			(8,596	)		—
	Purchase of treasury stock shares		(14,501	)		(332	)		(16,917	)
	Dividends on common stock		(2,295	)		(2,249	)		(2,315	)
	Net cash used for financing activities		(16,796	)		(11,177	)		(19,232	)
	Increase (decrease) in cash		(455	)		454			837
	CASH AT BEGINNING OF YEAR		3,650			3,196			2,359
	CASH AT END OF YEAR	$	3,195		$	3,650		$	3,196

Selected_Quarterly_Data_Unaudi1

Selected Quarterly Data (Unaudited) (Tables)	12 Months Ended
	Sep. 30, 2013
Quarterly Financial Information Disclosure [Abstract]	'
Summary of Selected Quarterly Data	'
	20	SELECTED QUARTERLY DATA (UNAUDITED)
			Three Months Ended
			December 31,		March 31,		June 30,		September 30,
			2012		2013		2013		2013
	Total interest income		$	13,950	$	12,690	$	12,491	$	11,971
	Total interest expense			3,231		2,806		2,642		2,578
	Net interest income			10,719		9,884		9,849		9,393
	Provision for loan losses			1,000		850		1,100		800
	Net interest income after provision for loan losses			9,719		9,034		8,749		8,593
	Total noninterest income			2,026		2,458		1,800		1,740
	Total noninterest expense			7,505		8,790		8,154		8,013
	Income (loss) before income taxes			4,240		2,702		2,395		2,320
	Income taxes (benefit)			1,361		662		519		292
	Net income		$	2,879	$	2,040	$	1,876	$	2,028
	Per share data:
	Net income
	Basic		$	0.24	$	0.17	$	0.16	$	0.19
	Diluted		$	0.24	$	0.17	$	0.16	$	0.19
	Average shares outstanding
	Basic			12,088,125		11,763,581		11,409,791		10,954,982
	Diluted			12,088,125		11,763,581		11,409,791		10,954,982
			Three Months Ended
			December 31,		March 31,		June 30,		September 30,
			2011		2012		2012		2012
	Total interest income		$	11,029	$	10,834	$	10,576	$	12,761
	Total interest expense			4,321		4,063		3,840		3,908
	Net interest income			6,708		6,771		6,736		8,853
	Provision for loan losses			500		650		600		800
	Net interest income after provision for loan losses			6,208		6,121		6,136		8,053
	Total noninterest income			1,524		1,623		1,495		2,093
	Total noninterest expense			6,662		6,874		6,526		12,943
	Income (loss) before income taxes			1,070		870		1,105		(2,797	)
	Income taxes (benefit)			184		211		311		(673	)
	Net income (loss)		$	886	$	659	$	794	$	(2,124	)
	Per share data:
	Net income
	Basic		$	0.08	$	0.06	$	0.07	$	(0.18	)
	Diluted		$	0.08	$	0.06	$	0.07	$	(0.18	)
	Average shares outstanding
	Basic			10,807,598		10,840,604		10,857,483		11,632,918
	Diluted			10,807,598		10,840,604		10,857,483		11,632,918

Summary_of_Significant_Account3

Summary of Significant Accounting Policies - Additional Information (Detail) (USD $)	12 Months Ended
	Sep. 30, 2013	Sep. 30, 2012
Summary Of Significant Accounting Policies [Line Items]	'	'
Percentage ownership of wholly owned subsidiary	100.00%	'
Total servicing assets included in other assets	$382,000	$365,000
Goodwill and Intangible Asset Impairment	0	0
Threshold percentage minimum for recognition upon settlement	'Greater than 50%	'
Cash equivalents interest bearing deposits with original maturities	'90 days	'
Minimum [Member]	'	'
Summary Of Significant Accounting Policies [Line Items]	'	'
Depreciation range for buildings, land improvements, and leasehold improvements	'10 years	'
Depreciation range for furniture, fixtures, and equipment	'3 years	'
Maximum [Member]	'	'
Summary Of Significant Accounting Policies [Line Items]	'	'
Depreciation range for buildings, land improvements, and leasehold improvements	'	'40 years
Depreciation range for furniture, fixtures, and equipment	'	'7 years
Federal Home Loan Bank System [Member]	'	'
Summary Of Significant Accounting Policies [Line Items]	'	'
Loan receivables contractual period for interest and principal accrual	'90 days	'
Percentage Investment in capital stock	0.35%	'
Investment on outstanding Borrowings, percentage	4.60%	'
Stock bought and sold based upon par value	$100	'

Summary_of_Significant_Account4

Summary of Significant Accounting Policies - Carrying Amount of Goodwill and Intangible Assets (Detail) (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2011
Goodwill	'	'	'
Balance at beginning of year	$8,541	$40	'
Goodwill acquired	276	8,501	'
Balance at end of year	8,817	8,541	40
Intangible assets	'	'	'
Balance at beginning of year	3,457	1,825	'
Intangible assets acquired	'	2,068	'
Amortization	-991	-436	-135
Balance at end of year	$2,466	$3,457	$1,825

Recovered_Sheet1

Summary of significant Accounting Policies - Amortizable Intangible Assets (Detail) (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2011
Finite And Infinite Lived Intangible Assets [Line Items]	'	'	'
Gross Carrying Amount	$4,028	'	'
Accumulated Amortization	1,562	571	'
Amortization of intangible assets	991	436	135
Customer Data [Member]	'	'	'
Finite And Infinite Lived Intangible Assets [Line Items]	'	'	'
Gross Carrying Amount	2,408	'	'
Accumulated Amortization	694	283	'
Employment Obligations [Member]	'	'	'
Finite And Infinite Lived Intangible Assets [Line Items]	'	'	'
Gross Carrying Amount	1,620	'	'
Accumulated Amortization	$868	$288	'

Summary_of_Significant_Account5

Summary of Significant Accounting Policies - Estimated Amortization Expense (Detail) (USD $)	Sep. 30, 2013
Accounting Policies [Abstract]	'
2014	$870,000
2015	477,000
2016	382,000
2017	267,000
2018	180,000
2019	81,000
2020	81,000
2021	78,000
2022	50,000
Total estimated amortization of expense	$2,466,000

Summary_of_Significant_Account6

Summary of Significant Accounting Policies - Components of Accumulated Other Comprehensive Income (Loss), Net of Tax (Detail) (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2011
Accounting Policies [Abstract]	'	'	'
Net unrealized gain on securities available for sale	$71	$6,208	$5,667
Net unrecognized pension cost	-1,306	-4,450	-5,081
Total	($1,235)	$1,758	$586

Earnings_per_Share_Composition

Earnings per Share - Composition of the Weighted-Average Common Shares (Denominator) Used in the Basic and Diluted Earnings Per Share Computation (Detail)	3 Months Ended								12 Months Ended
	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2012	Sep. 30, 2012	Jun. 30, 2012	Mar. 31, 2012	Dec. 31, 2011	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2011
Earnings Per Share [Abstract]	'	'	'	'	'	'	'	'	'	'	'
Weighted-average common shares outstanding	'	'	'	'	'	'	'	'	18,133,094	17,172,932	16,980,900
Average treasury stock shares	'	'	'	'	'	'	'	'	-5,475,194	-4,882,611	-4,089,417
Average unearned ESOP shares	'	'	'	'	'	'	'	'	-1,063,720	-1,109,012	-1,154,272
Average unearned nonvested shares	'	'	'	'	'	'	'	'	-34,627	-130,626	-249,296
Weighted-average common shares and common stock equivalents used to calculate basic earnings per share	10,954,982	11,409,791	11,763,581	12,088,125	11,632,918	10,857,483	10,840,604	10,807,598	11,559,553	11,050,683	11,487,915
Additional common stock equivalents (nonvested stock) used to calculate diluted earnings per share	'	'	'	'	'	'	'	'	'	'	'
Additional common stock equivalents (stock options) used to calculate diluted earnings per share	'	'	'	'	'	'	'	'	'	'	'
Weighted-average common shares and common stock equivalents used to calculate diluted earnings per share	'	'	'	'	'	'	'	'	11,559,553	11,050,683	11,487,915

Earnings_per_Share_Additional_

Earnings per Share - Additional Information (Detail) (USD $)	12 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2011
Stock Option [Member]	'	'	'
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]	'	'	'
Anti-dilutive securities	19,998	76,716	195,262
Price per share of anti-dilutive shares	$10.94	$12.35	$12.35
Stock Compensation Plan [Member]	'	'	'
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]	'	'	'
Anti-dilutive securities	1,458,379	1,458,379	1,458,379
Price per share of anti-dilutive shares	$12.35	$12.35	$12.35

Investment_Securities_Summary_

Investment Securities - Summary of Amortized Cost and Fair Value of Investment Securities Available for Sale (Detail) (USD $)	Sep. 30, 2013	Sep. 30, 2012
In Thousands, unless otherwise specified
Schedule of Available-for-sale Securities [Line Items]	'	'
Available for sale, Amortized Cost	$315,515	$320,179
Available for sale, Gross Unrealized Gains	4,361	9,529
Available for sale, Gross Unrealized Losses	-4,254	-123
Available for sale, Fair Value	315,622	329,585
Fannie Mae [Member]	'	'
Schedule of Available-for-sale Securities [Line Items]	'	'
Available for sale, Amortized Cost	114,927	111,145
Available for sale, Gross Unrealized Gains	1,691	4,652
Available for sale, Gross Unrealized Losses	-1,595	-3
Available for sale, Fair Value	115,023	115,794
Freddie Mac [Member]	'	'
Schedule of Available-for-sale Securities [Line Items]	'	'
Available for sale, Amortized Cost	60,111	48,913
Available for sale, Gross Unrealized Gains	838	1,952
Available for sale, Gross Unrealized Losses	-1,252	-11
Available for sale, Fair Value	59,697	50,854
Governmental National Mortgage Association Securities [Member]	'	'
Schedule of Available-for-sale Securities [Line Items]	'	'
Available for sale, Amortized Cost	39,692	43,164
Available for sale, Gross Unrealized Gains	289	803
Available for sale, Gross Unrealized Losses	-230	-16
Available for sale, Fair Value	39,751	43,951
Other Mortgage-backed Securities [Member]	'	'
Schedule of Available-for-sale Securities [Line Items]	'	'
Available for sale, Amortized Cost	3,385	5,043
Available for sale, Gross Unrealized Gains	'	162
Available for sale, Gross Unrealized Losses	-19	'
Available for sale, Fair Value	3,366	5,205
Mortgage-Backed Securities [Member]	'	'
Schedule of Available-for-sale Securities [Line Items]	'	'
Available for sale, Amortized Cost	218,115	208,265
Available for sale, Gross Unrealized Gains	2,818	7,569
Available for sale, Gross Unrealized Losses	-3,096	-30
Available for sale, Fair Value	217,837	215,804
Obligations of States and Political Subdivisions [Member]	'	'
Schedule of Available-for-sale Securities [Line Items]	'	'
Available for sale, Amortized Cost	23,754	18,611
Available for sale, Gross Unrealized Gains	654	906
Available for sale, Gross Unrealized Losses	-499	'
Available for sale, Fair Value	23,909	19,517
U.S. Government Agency Securities [Member]	'	'
Schedule of Available-for-sale Securities [Line Items]	'	'
Available for sale, Amortized Cost	52,775	74,106
Available for sale, Gross Unrealized Gains	225	379
Available for sale, Gross Unrealized Losses	-480	-1
Available for sale, Fair Value	52,520	74,484
Corporate Obligations [Member]	'	'
Schedule of Available-for-sale Securities [Line Items]	'	'
Available for sale, Amortized Cost	12,756	8,602
Available for sale, Gross Unrealized Gains	186	146
Available for sale, Gross Unrealized Losses	-169	-91
Available for sale, Fair Value	12,773	8,657
Trust-preferred Securities [Member]	'	'
Schedule of Available-for-sale Securities [Line Items]	'	'
Available for sale, Amortized Cost	4,943	5,852
Available for sale, Gross Unrealized Gains	471	382
Available for sale, Gross Unrealized Losses	'	-1
Available for sale, Fair Value	5,414	6,233
Other Debt Securities [Member]	'	'
Schedule of Available-for-sale Securities [Line Items]	'	'
Available for sale, Amortized Cost	1,147	1,476
Available for sale, Gross Unrealized Gains	7	36
Available for sale, Fair Value	1,154	1,512
Total Debt Securities [Member]	'	'
Schedule of Available-for-sale Securities [Line Items]	'	'
Available for sale, Amortized Cost	313,490	316,912
Available for sale, Gross Unrealized Gains	4,361	9,418
Available for sale, Gross Unrealized Losses	-4,244	-123
Available for sale, Fair Value	313,607	326,207
Equity Securities [Member]	'	'
Schedule of Available-for-sale Securities [Line Items]	'	'
Available for sale, Amortized Cost	2,025	3,267
Available for sale, Gross Unrealized Gains	'	111
Available for sale, Gross Unrealized Losses	-10	'
Available for sale, Fair Value	$2,015	$3,378

Investment_Securities_Schedule

Investment Securities - Schedule of Amortized Cost and Fair Value of Debt Securities by Contractual Maturity (Detail) (USD $)	Sep. 30, 2013
In Thousands, unless otherwise specified
Available For Sale Securities Debt Maturities Amortized Cost [Abstract]	'
Due in one year or less, Amortized Cost	$3,026
Due after one year through five years, Amortized Cost	41,889
Due after five years through ten years, Amortized Cost	65,780
Due after ten years, Amortized Cost	202,795
Total, Amortized Cost	313,490
Due in one year or less, Fair Value	3,044
Due after one year through five years, Fair Value	42,147
Due after five years through ten years, Fair Value	65,847
Due after ten years, Fair Value	202,569
Total, Fair Value	$313,607

Investment_Securities_Addition

Investment Securities - Additional Information (Detail) (USD $)	12 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2011
Schedule of Available-for-sale Securities [Line Items]	'	'	'
Realized gross gains	$766,000	$343,000	$792,000
Realized gross losses	17,000	0	14,000
Proceeds from the sale of investment securities	39,212,000	44,844,000	24,643,000
Investment securities with carrying values	50,162,000	22,832,000	'
U.S. Government Agency Securities [Member]	'	'	'
Schedule of Available-for-sale Securities [Line Items]	'	'	'
Securities sold under agreement to repurchase and other borrowings	14,795,000	'	'
Mortgage-Backed Securities [Member]	'	'	'
Schedule of Available-for-sale Securities [Line Items]	'	'	'
Securities sold under agreement to repurchase and other borrowings	'	$56,947,000	'

Unrealized_Losses_on_Securitie2

Unrealized Losses on Securities - Schedule of Gross Unrealized Losses and Fair Value (Detail) (USD $)	Sep. 30, 2013	Sep. 30, 2012
In Thousands, unless otherwise specified	Security	Security
Schedule of Available-for-sale Securities [Line Items]	'	'
Number of Securities	82	16
Fair Value, Less than Twelve Months	$139,442	$15,231
Gross Unrealized Losses, Less than Twelve Months	-4,247	-57
Fair Value, Twelve Months or Greater	2,056	1,434
Gross Unrealized Losses, Twelve Months or Greater	-7	-66
Fair Value, Total	141,498	16,665
Gross Unrealized Losses, Total	-4,254	-123
Fannie Mae [Member]	'	'
Schedule of Available-for-sale Securities [Line Items]	'	'
Number of Securities	30	3
Fair Value, Less than Twelve Months	47,814	4,083
Gross Unrealized Losses, Less than Twelve Months	-1,589	-3
Fair Value, Twelve Months or Greater	1,057	'
Gross Unrealized Losses, Twelve Months or Greater	-6	'
Fair Value, Total	48,871	4,083
Gross Unrealized Losses, Total	-1,595	-3
Freddie Mac [Member]	'	'
Schedule of Available-for-sale Securities [Line Items]	'	'
Number of Securities	20	1
Fair Value, Less than Twelve Months	32,781	2,002
Gross Unrealized Losses, Less than Twelve Months	-1,252	-11
Fair Value, Total	32,781	2,002
Gross Unrealized Losses, Total	-1,252	-11
Governmental National Mortgage Association Securities [Member]	'	'
Schedule of Available-for-sale Securities [Line Items]	'	'
Number of Securities	6	5
Fair Value, Less than Twelve Months	10,301	6,090
Gross Unrealized Losses, Less than Twelve Months	-230	-16
Fair Value, Total	10,301	6,090
Gross Unrealized Losses, Total	-230	-16
Other Mortgage-backed Securities [Member]	'	'
Schedule of Available-for-sale Securities [Line Items]	'	'
Number of Securities	3	'
Fair Value, Less than Twelve Months	3,366	'
Gross Unrealized Losses, Less than Twelve Months	-19	'
Fair Value, Total	3,366	'
Gross Unrealized Losses, Total	-19	'
Obligations of States and Political Subdivisions [Member]	'	'
Schedule of Available-for-sale Securities [Line Items]	'	'
Number of Securities	7	'
Fair Value, Less than Twelve Months	8,064	'
Gross Unrealized Losses, Less than Twelve Months	-499	'
Fair Value, Total	8,064	'
Gross Unrealized Losses, Total	-499	'
U.S. Government Agency Securities [Member]	'	'
Schedule of Available-for-sale Securities [Line Items]	'	'
Number of Securities	10	1
Fair Value, Less than Twelve Months	30,084	999
Gross Unrealized Losses, Less than Twelve Months	-479	-1
Fair Value, Twelve Months or Greater	999	'
Gross Unrealized Losses, Twelve Months or Greater	-1	'
Fair Value, Total	31,083	999
Gross Unrealized Losses, Total	-480	-1
Corporate Obligations [Member]	'	'
Schedule of Available-for-sale Securities [Line Items]	'	'
Number of Securities	5	5
Fair Value, Less than Twelve Months	5,042	1,059
Gross Unrealized Losses, Less than Twelve Months	-169	-25
Fair Value, Twelve Months or Greater	'	1,434
Gross Unrealized Losses, Twelve Months or Greater	'	-66
Fair Value, Total	5,042	2,493
Gross Unrealized Losses, Total	-169	-91
Equity Securities [Member]	'	'
Schedule of Available-for-sale Securities [Line Items]	'	'
Number of Securities	1	'
Fair Value, Less than Twelve Months	1,990	'
Gross Unrealized Losses, Less than Twelve Months	-10	'
Fair Value, Total	1,990	'
Gross Unrealized Losses, Total	-10	'
Trust-preferred Securities [Member]	'	'
Schedule of Available-for-sale Securities [Line Items]	'	'
Number of Securities	'	1
Fair Value, Less than Twelve Months	'	998
Gross Unrealized Losses, Less than Twelve Months	'	-1
Fair Value, Total	'	998
Gross Unrealized Losses, Total	'	($1)

Loans_Receivable_Summary_of_Lo

Loans Receivable - Summary of Loans Receivable (Detail) (USD $)	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2011
In Thousands, unless otherwise specified
Real estate loans:	'	'	'
Total Loans	$936,294	$957,657	'
Less allowance for loan losses	8,064	7,302	8,170
Net loans	928,230	950,355	'
Residential Real Estate Loans [Member]	'	'	'
Real estate loans:	'	'	'
Total Loans	686,651	696,696	'
Less allowance for loan losses	5,787	5,401	5,220
Construction Real Estate Loans [Member]	'	'	'
Real estate loans:	'	'	'
Total Loans	2,288	3,805	'
Less allowance for loan losses	20	29	8
Commercial Real Estate Loans [Member]	'	'	'
Real estate loans:	'	'	'
Total Loans	159,469	160,192	'
Less allowance for loan losses	946	699	1,255
Commercial [Member]	'	'	'
Real estate loans:	'	'	'
Total Loans	10,125	12,818	'
Less allowance for loan losses	337	474	500
Obligations of States and Political Subdivisions [Member]	'	'	'
Real estate loans:	'	'	'
Total Loans	33,445	33,736	'
Less allowance for loan losses	130	127	74
Home Equity Loans and Lines of Credit [Member]	'	'	'
Real estate loans:	'	'	'
Total Loans	41,923	47,925	'
Less allowance for loan losses	430	499	622
Other [Member]	'	'	'
Real estate loans:	'	'	'
Total Loans	2,393	2,485	'
Less allowance for loan losses	$21	$22	$80

Loans_Receivable_Additional_In

Loans Receivable - Additional Information (Detail) (USD $)	1 Months Ended	12 Months Ended
	Jul. 31, 2012	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2011
Receivables [Abstract]	'	'	'	'
Carrying value of Purchased loans	'	$7,100,000	'	'
Unpaid principal balance	12,922,000	37,236,000	33,517,000	'
Estimated fair value	7,321,000	7,300,000	'	'
Contractual cash flows	13,890,000	13,900,000	'	'
Preliminary estimate of expected cash flows	8,753,000	8,800,000	'	'
Non-accretable discount	-5,137,000	5,100,000	'	'
Cash flows in excess of estimated fair value	'	1,400,000	'	'
Mortgage loans	'	80,986,000	82,263,000	'
Non Accrual loans	'	23,279,000	23,707,000	10,971,000
Additional interest income under loan agreements	'	883,000	592,000	615,000
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	'	250,000	'	'
Minimum external review amount	'	$500,000	'	'

Loans_Receivable_Accounting_Ad

Loans Receivable - Accounting Adjustments Related to the Purchased Impaired Loans (Detail) (USD $)	1 Months Ended	12 Months Ended
In Thousands, unless otherwise specified	Jul. 31, 2012	Sep. 30, 2013	Sep. 30, 2012
Receivables [Abstract]	'	'	'
Unpaid principal balance	$12,922	$37,236	$33,517
Interest	968	'	'
Contractual cash flows	13,890	13,900	'
Non-accretable discount	-5,137	5,100	'
Expected cash flows	8,753	8,800	'
Accretable discount	-1,432	'	'
Estimated fair value	$7,321	$7,300	'

Loans_Receivable_Changes_in_Yi

Loans Receivable - Changes in Yield for Accretable Purchased Credit-Impaired Loans (Detail) (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Sep. 30, 2013	Sep. 30, 2012
Receivables [Abstract]	'	'
Balance at beginning of period	$1,098	$1,432
Accretion	-1,098	-334
Balance at end of period	'	$1,098

Loans_Receivable_Summary_of_Ad

Loans Receivable - Summary of Additional Information Regarding Loans Acquired and Accounted (Detail) (USD $)	Sep. 30, 2013	Sep. 30, 2012
In Thousands, unless otherwise specified
Receivables [Abstract]	'	'
Outstanding balance	$9,371	$12,527
Carrying amount	$7,131	$7,500

Loans_Receivable_Summary_of_Im

Loans Receivable - Summary of Impaired Loans (Detail) (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2011
Receivables [Abstract]	'	'	'
Impaired loans with a related allowance	$6,160	$4,368	$5,630
Impaired loans without a related allowance	31,066	29,103	12,589
Related allowance for loan losses	819	952	1,160
Average recorded balance of impaired loans	37,386	22,393	10,718
Interest income recognized	$860	$649	$109

Loans_Receivable_Schedule_of_L

Loans Receivable - Schedule of Loans Evaluated for Impairment (Detail) (USD $)	Sep. 30, 2013	Sep. 30, 2012
In Thousands, unless otherwise specified
Financing Receivable, Recorded Investment [Line Items]	'	'
Total Loans	$936,294	$957,657
Individually Evaluated for Impairment	30,095	25,971
Loans Acquired with Deteriorated Credit Quality	7,131	7,500
Collectively Evaluated for Impairment	899,068	924,186
Residential Real Estate Loans [Member]	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Total Loans	686,651	696,696
Individually Evaluated for Impairment	14,018	7,942
Loans Acquired with Deteriorated Credit Quality	271	271
Collectively Evaluated for Impairment	672,362	688,483
Construction Real Estate Loans [Member]	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Total Loans	2,288	3,805
Collectively Evaluated for Impairment	2,288	3,805
Commercial Real Estate Loans [Member]	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Total Loans	159,469	160,192
Individually Evaluated for Impairment	15,478	17,415
Loans Acquired with Deteriorated Credit Quality	6,355	6,159
Collectively Evaluated for Impairment	137,636	136,618
Commercial [Member]	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Total Loans	10,125	12,818
Individually Evaluated for Impairment	220	423
Loans Acquired with Deteriorated Credit Quality	502	1,007
Collectively Evaluated for Impairment	9,403	11,388
Obligations of States and Political Subdivisions [Member]	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Total Loans	33,445	33,736
Collectively Evaluated for Impairment	33,445	33,736
Home Equity Loans and Lines of Credit [Member]	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Total Loans	41,923	47,925
Individually Evaluated for Impairment	379	191
Loans Acquired with Deteriorated Credit Quality	3	44
Collectively Evaluated for Impairment	41,541	47,690
Other [Member]	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Total Loans	2,393	2,485
Loans Acquired with Deteriorated Credit Quality	'	19
Collectively Evaluated for Impairment	$2,393	$2,466

Loans_Receivable_Schedule_of_I

Loans Receivable - Schedule of Investment and Unpaid Principal Balances for Impaired Loans (Detail) (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2011	Jul. 31, 2012
Financing Receivable, Impaired [Line Items]	'	'	'	'
Recorded Investment	$37,226	$33,471	'	'
Unpaid principal balance	37,236	33,517	'	12,922
Associated Allowance	819	952	1,160	'
Average Recorded Investment	37,386	22,393	10,718	'
Interest income recognized	860	649	109	'
With no Specific Allowance Recorded [Member]	'	'	'	'
Financing Receivable, Impaired [Line Items]	'	'	'	'
Recorded Investment	31,066	29,103	'	'
Unpaid principal balance	31,072	29,148	'	'
Associated Allowance	'	'	'	'
Average Recorded Investment	31,892	19,115	'	'
Interest income recognized	786	567	'	'
With an Allowance Recorded [Member]	'	'	'	'
Financing Receivable, Impaired [Line Items]	'	'	'	'
Recorded Investment	6,160	4,368	'	'
Unpaid principal balance	6,164	4,369	'	'
Associated Allowance	819	952	'	'
Average Recorded Investment	5,494	3,278	'	'
Interest income recognized	74	82	'	'
Residential Real Estate Loans [Member]	'	'	'	'
Financing Receivable, Impaired [Line Items]	'	'	'	'
Recorded Investment	14,289	8,213	'	'
Unpaid principal balance	14,286	8,207	'	'
Associated Allowance	518	661	'	'
Average Recorded Investment	12,371	6,579	'	'
Interest income recognized	233	150	'	'
Residential Real Estate Loans [Member] | With no Specific Allowance Recorded [Member]	'	'	'	'
Financing Receivable, Impaired [Line Items]	'	'	'	'
Recorded Investment	11,251	5,182	'	'
Unpaid principal balance	11,245	5,177	'	'
Associated Allowance	'	'	'	'
Average Recorded Investment	9,716	4,687	'	'
Interest income recognized	159	82	'	'
Residential Real Estate Loans [Member] | With an Allowance Recorded [Member]	'	'	'	'
Financing Receivable, Impaired [Line Items]	'	'	'	'
Recorded Investment	3,038	3,031	'	'
Unpaid principal balance	3,041	3,030	'	'
Associated Allowance	518	661	'	'
Average Recorded Investment	2,655	1,892	'	'
Interest income recognized	74	68	'	'
Construction [Member]	'	'	'	'
Financing Receivable, Impaired [Line Items]	'	'	'	'
Recorded Investment	'	'	'	'
Unpaid principal balance	'	'	'	'
Associated Allowance	'	'	'	'
Average Recorded Investment	'	'	'	'
Interest income recognized	'	'	'	'
Construction [Member] | With no Specific Allowance Recorded [Member]	'	'	'	'
Financing Receivable, Impaired [Line Items]	'	'	'	'
Recorded Investment	'	'	'	'
Unpaid principal balance	'	'	'	'
Associated Allowance	'	'	'	'
Average Recorded Investment	'	'	'	'
Interest income recognized	'	'	'	'
Construction [Member] | With an Allowance Recorded [Member]	'	'	'	'
Financing Receivable, Impaired [Line Items]	'	'	'	'
Recorded Investment	'	'	'	'
Unpaid principal balance	'	'	'	'
Associated Allowance	'	'	'	'
Average Recorded Investment	'	'	'	'
Interest income recognized	'	'	'	'
Commercial Real Estate Loans [Member]	'	'	'	'
Financing Receivable, Impaired [Line Items]	'	'	'	'
Recorded Investment	21,833	23,574	'	'
Unpaid principal balance	21,846	23,627	'	'
Associated Allowance	301	270	'	'
Average Recorded Investment	23,590	14,910	'	'
Interest income recognized	615	470	'	'
Commercial Real Estate Loans [Member] | With no Specific Allowance Recorded [Member]	'	'	'	'
Financing Receivable, Impaired [Line Items]	'	'	'	'
Recorded Investment	18,711	22,290	'	'
Unpaid principal balance	18,723	22,341	'	'
Associated Allowance	'	'	'	'
Average Recorded Investment	20,751	13,584	'	'
Interest income recognized	615	457	'	'
Commercial Real Estate Loans [Member] | With an Allowance Recorded [Member]	'	'	'	'
Financing Receivable, Impaired [Line Items]	'	'	'	'
Recorded Investment	3,122	1,284	'	'
Unpaid principal balance	3,123	1,286	'	'
Associated Allowance	301	270	'	'
Average Recorded Investment	2,839	1,326	'	'
Interest income recognized	'	13	'	'
Commercial [Member]	'	'	'	'
Financing Receivable, Impaired [Line Items]	'	'	'	'
Recorded Investment	722	1,430	'	'
Unpaid principal balance	722	1,429	'	'
Associated Allowance	'	12	'	'
Average Recorded Investment	1,034	628	'	'
Interest income recognized	9	28	'	'
Commercial [Member] | With no Specific Allowance Recorded [Member]	'	'	'	'
Financing Receivable, Impaired [Line Items]	'	'	'	'
Recorded Investment	722	1,386	'	'
Unpaid principal balance	722	1,385	'	'
Associated Allowance	'	'	'	'
Average Recorded Investment	1,034	581	'	'
Interest income recognized	9	28	'	'
Commercial [Member] | With an Allowance Recorded [Member]	'	'	'	'
Financing Receivable, Impaired [Line Items]	'	'	'	'
Recorded Investment	'	44	'	'
Unpaid principal balance	'	44	'	'
Associated Allowance	'	12	'	'
Average Recorded Investment	'	47	'	'
Interest income recognized	'	'	'	'
Obligations of States and Political Subdivisions [Member]	'	'	'	'
Financing Receivable, Impaired [Line Items]	'	'	'	'
Recorded Investment	'	'	'	'
Unpaid principal balance	'	'	'	'
Associated Allowance	'	'	'	'
Average Recorded Investment	'	'	'	'
Interest income recognized	'	'	'	'
Obligations of States and Political Subdivisions [Member] | With no Specific Allowance Recorded [Member]	'	'	'	'
Financing Receivable, Impaired [Line Items]	'	'	'	'
Recorded Investment	'	'	'	'
Unpaid principal balance	'	'	'	'
Associated Allowance	'	'	'	'
Average Recorded Investment	'	'	'	'
Interest income recognized	'	'	'	'
Obligations of States and Political Subdivisions [Member] | With an Allowance Recorded [Member]	'	'	'	'
Financing Receivable, Impaired [Line Items]	'	'	'	'
Recorded Investment	'	'	'	'
Unpaid principal balance	'	'	'	'
Associated Allowance	'	'	'	'
Average Recorded Investment	'	'	'	'
Interest income recognized	'	'	'	'
Home Equity Loans and Lines of Credit [Member]	'	'	'	'
Financing Receivable, Impaired [Line Items]	'	'	'	'
Recorded Investment	382	235	'	'
Unpaid principal balance	382	235	'	'
Associated Allowance	'	9	'	'
Average Recorded Investment	373	251	'	'
Interest income recognized	3	1	'	'
Home Equity Loans and Lines of Credit [Member] | With no Specific Allowance Recorded [Member]	'	'	'	'
Financing Receivable, Impaired [Line Items]	'	'	'	'
Recorded Investment	382	226	'	'
Unpaid principal balance	382	226	'	'
Associated Allowance	'	'	'	'
Average Recorded Investment	373	238	'	'
Interest income recognized	3	'	'	'
Home Equity Loans and Lines of Credit [Member] | With an Allowance Recorded [Member]	'	'	'	'
Financing Receivable, Impaired [Line Items]	'	'	'	'
Recorded Investment	'	9	'	'
Unpaid principal balance	'	9	'	'
Associated Allowance	'	9	'	'
Average Recorded Investment	'	13	'	'
Interest income recognized	'	1	'	'
Other [Member]	'	'	'	'
Financing Receivable, Impaired [Line Items]	'	'	'	'
Recorded Investment	'	19	'	'
Unpaid principal balance	'	19	'	'
Associated Allowance	'	'	'	'
Average Recorded Investment	18	25	'	'
Interest income recognized	'	'	'	'
Other [Member] | With no Specific Allowance Recorded [Member]	'	'	'	'
Financing Receivable, Impaired [Line Items]	'	'	'	'
Recorded Investment	'	19	'	'
Unpaid principal balance	'	19	'	'
Associated Allowance	'	'	'	'
Average Recorded Investment	18	25	'	'
Interest income recognized	'	'	'	'
Other [Member] | With an Allowance Recorded [Member]	'	'	'	'
Financing Receivable, Impaired [Line Items]	'	'	'	'
Recorded Investment	'	'	'	'
Unpaid principal balance	'	'	'	'
Associated Allowance	'	'	'	'
Average Recorded Investment	'	'	'	'
Interest income recognized	'	'	'	'

Loans_Receivable_Classes_of_Lo

Loans Receivable - Classes of Loan Portfolio, Internal Risk Rating System (Detail) (USD $)	Sep. 30, 2013	Sep. 30, 2012
In Thousands, unless otherwise specified
Financing Receivable, Recorded Investment [Line Items]	'	'
Loan, total	$203,039	$206,746
Commercial Real Estate Loans [Member]	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Loan, total	159,469	160,192
Commercial [Member]	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Loan, total	10,125	12,818
Obligations of States and Political Subdivisions [Member]	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Loan, total	33,445	33,736
Pass [Member]	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Loan, total	172,710	178,612
Pass [Member] | Commercial Real Estate Loans [Member]	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Loan, total	129,799	132,841
Pass [Member] | Commercial [Member]	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Loan, total	9,466	12,035
Pass [Member] | Obligations of States and Political Subdivisions [Member]	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Loan, total	33,445	33,736
Special Mention [Member]	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Loan, total	9,876	5,862
Special Mention [Member] | Commercial Real Estate Loans [Member]	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Loan, total	9,440	5,502
Special Mention [Member] | Commercial [Member]	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Loan, total	436	360
Special Mention [Member] | Obligations of States and Political Subdivisions [Member]	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Loan, total	'	'
Substandard [Member]	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Loan, total	20,453	22,272
Substandard [Member] | Commercial Real Estate Loans [Member]	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Loan, total	20,230	21,849
Substandard [Member] | Commercial [Member]	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Loan, total	223	423
Substandard [Member] | Obligations of States and Political Subdivisions [Member]	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Loan, total	'	'
Doubtful [Member]	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Loan, total	'	'
Doubtful [Member] | Commercial Real Estate Loans [Member]	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Loan, total	'	'
Doubtful [Member] | Commercial [Member]	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Loan, total	'	'
Doubtful [Member] | Obligations of States and Political Subdivisions [Member]	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Loan, total	'	'

Loans_Receivable_Schedule_of_P

Loans Receivable - Schedule of Performing or Nonperforming Loans (Detail) (USD $)	Sep. 30, 2013	Sep. 30, 2012
In Thousands, unless otherwise specified
Financing Receivable, Recorded Investment [Line Items]	'	'
Total	$733,255	$750,911
Residential Real Estate Loans [Member]	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Total	686,651	696,696
Construction Real Estate Loans [Member]	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Total	2,288	3,805
Home Equity Loans and Lines of Credit [Member]	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Total	41,923	47,925
Other [Member]	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Total	2,393	2,485
Performing [Member]	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Total	721,971	739,983
Performing [Member] | Residential Real Estate Loans [Member]	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Total	675,706	686,160
Performing [Member] | Construction Real Estate Loans [Member]	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Total	2,288	3,805
Performing [Member] | Home Equity Loans and Lines of Credit [Member]	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Total	41,584	47,552
Performing [Member] | Other [Member]	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Total	2,393	2,466
Nonperforming [Member]	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Total	11,284	10,928
Nonperforming [Member] | Residential Real Estate Loans [Member]	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Total	10,945	10,536
Nonperforming [Member] | Home Equity Loans and Lines of Credit [Member]	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Total	339	373
Nonperforming [Member] | Other [Member]	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Total	'	$19

Loans_Receivable_Classes_of_th

Loans Receivable - Classes of the Loan Portfolio Summarized by the Aging Categories (Detail) (USD $)	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2011
In Thousands, unless otherwise specified
Financing Receivable, Recorded Investment, Past Due [Line Items]	'	'	'
Current	$906,309	$921,407	'
31-60 Days Past Due	5,639	7,783	'
61-90 Days Past Due	1,067	4,760	'
Greater than 90 Days Past Due	'	'	'
Non Accrual	23,279	23,707	10,971
Total Past Due	29,985	36,250	'
Total Loans	936,294	957,657	'
Residential Real Estate Loans [Member]	'	'	'
Financing Receivable, Recorded Investment, Past Due [Line Items]	'	'	'
Current	671,850	681,222	'
31-60 Days Past Due	2,866	3,664	'
61-90 Days Past Due	990	1,274	'
Greater than 90 Days Past Due	'	'	'
Non Accrual	10,945	10,536	'
Total Past Due	14,801	15,474	'
Total Loans	686,651	696,696	'
Construction Real Estate Loans [Member]	'	'	'
Financing Receivable, Recorded Investment, Past Due [Line Items]	'	'	'
Current	2,288	3,805	'
31-60 Days Past Due	'	'	'
61-90 Days Past Due	'	'	'
Greater than 90 Days Past Due	'	'	'
Non Accrual	'	'	'
Total Past Due	'	'	'
Total Loans	2,288	3,805	'
Commercial Real Estate Loans [Member]	'	'	'
Financing Receivable, Recorded Investment, Past Due [Line Items]	'	'	'
Current	146,062	142,277	'
31-60 Days Past Due	2,589	3,658	'
61-90 Days Past Due	'	3,348	'
Greater than 90 Days Past Due	'	'	'
Non Accrual	10,818	10,909	'
Total Past Due	13,407	17,915	'
Total Loans	159,469	160,192	'
Commercial [Member]	'	'	'
Financing Receivable, Recorded Investment, Past Due [Line Items]	'	'	'
Current	8,948	10,948	'
31-60 Days Past Due	'	'	'
61-90 Days Past Due	'	'	'
Greater than 90 Days Past Due	'	'	'
Non Accrual	1,177	1,870	'
Total Past Due	1,177	1,870	'
Total Loans	10,125	12,818	'
Obligations of States and Political Subdivisions [Member]	'	'	'
Financing Receivable, Recorded Investment, Past Due [Line Items]	'	'	'
Current	33,445	33,736	'
31-60 Days Past Due	'	'	'
61-90 Days Past Due	'	'	'
Greater than 90 Days Past Due	'	'	'
Non Accrual	'	'	'
Total Past Due	'	'	'
Total Loans	33,445	33,736	'
Home Equity Loans and Lines of Credit [Member]	'	'	'
Financing Receivable, Recorded Investment, Past Due [Line Items]	'	'	'
Current	41,380	46,967	'
31-60 Days Past Due	127	447	'
61-90 Days Past Due	77	138	'
Greater than 90 Days Past Due	'	'	'
Non Accrual	339	373	'
Total Past Due	543	958	'
Total Loans	41,923	47,925	'
Other [Member]	'	'	'
Financing Receivable, Recorded Investment, Past Due [Line Items]	'	'	'
Current	2,336	2,452	'
31-60 Days Past Due	57	14	'
61-90 Days Past Due	'	'	'
Greater than 90 Days Past Due	'	'	'
Non Accrual	'	19	'
Total Past Due	57	33	'
Total Loans	$2,393	$2,485	'

Loans_Receivable_Summary_of_Pr

Loans Receivable - Summary of Primary Segments of ALL (Detail) (USD $)	3 Months Ended								12 Months Ended
In Thousands, unless otherwise specified	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2012	Sep. 30, 2012	Jun. 30, 2012	Mar. 31, 2012	Dec. 31, 2011	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2011
Financing Receivable, Allowance for Credit Losses [Line Items]	'	'	'	'	'	'	'	'	'	'	'
Balance, Beginning of period	'	'	'	$7,302	'	'	'	$8,170	$7,302	$8,170	'
Charge-offs	'	'	'	'	'	'	'	'	-3,053	-3,777	'
Recoveries	'	'	'	'	'	'	'	'	65	359	'
Provision	800	1,100	850	1,000	800	600	650	500	3,750	2,550	2,055
Balance, End of period	8,064	'	'	'	7,302	'	'	'	8,064	7,302	8,170
Individually evaluated for impairment	819	'	'	'	952	'	'	'	819	952	'
Collectively evaluated for impairment	7,245	'	'	'	6,350	'	'	'	7,245	6,350	'
Balance, End of period	8,064	'	'	'	7,302	'	'	'	8,064	7,302	8,170
Residential Real Estate Loans [Member]	'	'	'	'	'	'	'	'	'	'	'
Financing Receivable, Allowance for Credit Losses [Line Items]	'	'	'	'	'	'	'	'	'	'	'
Balance, Beginning of period	'	'	'	5,401	'	'	'	5,220	5,401	5,220	'
Charge-offs	'	'	'	'	'	'	'	'	-2,401	-2,366	'
Recoveries	'	'	'	'	'	'	'	'	50	291	'
Provision	'	'	'	'	'	'	'	'	2,737	2,256	'
Balance, End of period	5,787	'	'	'	5,401	'	'	'	5,787	5,401	'
Individually evaluated for impairment	518	'	'	'	661	'	'	'	518	661	'
Collectively evaluated for impairment	5,269	'	'	'	4,740	'	'	'	5,269	4,740	'
Balance, End of period	5,787	'	'	'	5,401	'	'	'	5,787	5,401	'
Construction Real Estate Loans [Member]	'	'	'	'	'	'	'	'	'	'	'
Financing Receivable, Allowance for Credit Losses [Line Items]	'	'	'	'	'	'	'	'	'	'	'
Balance, Beginning of period	'	'	'	29	'	'	'	8	29	8	'
Charge-offs	'	'	'	'	'	'	'	'	'	'	'
Recoveries	'	'	'	'	'	'	'	'	'	'	'
Provision	'	'	'	'	'	'	'	'	-9	21	'
Balance, End of period	20	'	'	'	29	'	'	'	20	29	'
Individually evaluated for impairment	'	'	'	'	'	'	'	'	'	'	'
Collectively evaluated for impairment	20	'	'	'	29	'	'	'	20	29	'
Balance, End of period	20	'	'	'	29	'	'	'	20	29	'
Commercial Real Estate Loans [Member]	'	'	'	'	'	'	'	'	'	'	'
Financing Receivable, Allowance for Credit Losses [Line Items]	'	'	'	'	'	'	'	'	'	'	'
Balance, Beginning of period	'	'	'	699	'	'	'	1,255	699	1,255	'
Charge-offs	'	'	'	'	'	'	'	'	-403	-987	'
Recoveries	'	'	'	'	'	'	'	'	2	7	'
Provision	'	'	'	'	'	'	'	'	648	424	'
Balance, End of period	946	'	'	'	699	'	'	'	946	699	'
Individually evaluated for impairment	301	'	'	'	270	'	'	'	301	270	'
Collectively evaluated for impairment	645	'	'	'	429	'	'	'	645	429	'
Balance, End of period	946	'	'	'	699	'	'	'	946	699	'
Commercial [Member]	'	'	'	'	'	'	'	'	'	'	'
Financing Receivable, Allowance for Credit Losses [Line Items]	'	'	'	'	'	'	'	'	'	'	'
Balance, Beginning of period	'	'	'	474	'	'	'	500	474	500	'
Charge-offs	'	'	'	'	'	'	'	'	'	-31	'
Recoveries	'	'	'	'	'	'	'	'	'	26	'
Provision	'	'	'	'	'	'	'	'	-137	-21	'
Balance, End of period	337	'	'	'	474	'	'	'	337	474	'
Individually evaluated for impairment	'	'	'	'	12	'	'	'	'	12	'
Collectively evaluated for impairment	337	'	'	'	462	'	'	'	337	462	'
Balance, End of period	337	'	'	'	474	'	'	'	337	474	'
Obligations of States and Political Subdivisions [Member]	'	'	'	'	'	'	'	'	'	'	'
Financing Receivable, Allowance for Credit Losses [Line Items]	'	'	'	'	'	'	'	'	'	'	'
Balance, Beginning of period	'	'	'	127	'	'	'	74	127	74	'
Charge-offs	'	'	'	'	'	'	'	'	'	'	'
Recoveries	'	'	'	'	'	'	'	'	'	'	'
Provision	'	'	'	'	'	'	'	'	3	53	'
Balance, End of period	130	'	'	'	127	'	'	'	130	127	'
Individually evaluated for impairment	'	'	'	'	'	'	'	'	'	'	'
Collectively evaluated for impairment	130	'	'	'	127	'	'	'	130	127	'
Balance, End of period	130	'	'	'	127	'	'	'	130	127	'
Home Equity Loans and Lines of Credit [Member]	'	'	'	'	'	'	'	'	'	'	'
Financing Receivable, Allowance for Credit Losses [Line Items]	'	'	'	'	'	'	'	'	'	'	'
Balance, Beginning of period	'	'	'	499	'	'	'	622	499	622	'
Charge-offs	'	'	'	'	'	'	'	'	-243	-393	'
Recoveries	'	'	'	'	'	'	'	'	13	35	'
Provision	'	'	'	'	'	'	'	'	161	235	'
Balance, End of period	430	'	'	'	499	'	'	'	430	499	'
Individually evaluated for impairment	'	'	'	'	9	'	'	'	'	9	'
Collectively evaluated for impairment	430	'	'	'	490	'	'	'	430	490	'
Balance, End of period	430	'	'	'	499	'	'	'	430	499	'
Other [Member]	'	'	'	'	'	'	'	'	'	'	'
Financing Receivable, Allowance for Credit Losses [Line Items]	'	'	'	'	'	'	'	'	'	'	'
Balance, Beginning of period	'	'	'	22	'	'	'	80	22	80	'
Charge-offs	'	'	'	'	'	'	'	'	-6	'	'
Recoveries	'	'	'	'	'	'	'	'	'	'	'
Provision	'	'	'	'	'	'	'	'	5	-58	'
Balance, End of period	21	'	'	'	22	'	'	'	21	22	'
Individually evaluated for impairment	'	'	'	'	'	'	'	'	'	'	'
Collectively evaluated for impairment	21	'	'	'	22	'	'	'	21	22	'
Balance, End of period	21	'	'	'	22	'	'	'	21	22	'
Unallocated [Member]	'	'	'	'	'	'	'	'	'	'	'
Financing Receivable, Allowance for Credit Losses [Line Items]	'	'	'	'	'	'	'	'	'	'	'
Balance, Beginning of period	'	'	'	51	'	'	'	411	51	411	'
Charge-offs	'	'	'	'	'	'	'	'	'	'	'
Recoveries	'	'	'	'	'	'	'	'	'	'	'
Provision	'	'	'	'	'	'	'	'	342	-360	'
Balance, End of period	393	'	'	'	51	'	'	'	393	51	'
Individually evaluated for impairment	'	'	'	'	'	'	'	'	'	'	'
Collectively evaluated for impairment	393	'	'	'	51	'	'	'	393	51	'
Balance, End of period	$393	'	'	'	$51	'	'	'	$393	$51	'

Loans_Receivable_Summary_of_Tr

Loans Receivable - Summary of Troubled Debt Restructuring Granted (Detail) (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Sep. 30, 2013	Sep. 30, 2012
	Contract	Contract
Real Estate Loans [Member] | Residential [Member]	'	'
Financing Receivable Modifications Number Of Contracts [Line Items]	'	'
Number of Contracts	12	20
Pre-Modification Outstanding Recorded Investment	$1,578	$3,365
Post-Modification Outstanding Recorded Investment	1,578	3,281
Real Estate Loans [Member] | Construction [Member]	'	'
Financing Receivable Modifications Number Of Contracts [Line Items]	'	'
Number of Contracts	'	'
Pre-Modification Outstanding Recorded Investment	'	'
Post-Modification Outstanding Recorded Investment	'	'
Real Estate Loans [Member] | Commercial [Member]	'	'
Financing Receivable Modifications Number Of Contracts [Line Items]	'	'
Number of Contracts	'	10
Pre-Modification Outstanding Recorded Investment	'	3,165
Post-Modification Outstanding Recorded Investment	'	3,102
Commercial [Member]	'	'
Financing Receivable Modifications Number Of Contracts [Line Items]	'	'
Number of Contracts	'	3
Pre-Modification Outstanding Recorded Investment	'	217
Post-Modification Outstanding Recorded Investment	'	162
Obligations of States and Political Subdivisions [Member]	'	'
Financing Receivable Modifications Number Of Contracts [Line Items]	'	'
Number of Contracts	'	'
Pre-Modification Outstanding Recorded Investment	'	'
Post-Modification Outstanding Recorded Investment	'	'
Home Equity Loans and Lines of Credit [Member]	'	'
Financing Receivable Modifications Number Of Contracts [Line Items]	'	'
Number of Contracts	1	2
Pre-Modification Outstanding Recorded Investment	98	5
Post-Modification Outstanding Recorded Investment	98	4
Other [Member]	'	'
Financing Receivable Modifications Number Of Contracts [Line Items]	'	'
Number of Contracts	'	'
Pre-Modification Outstanding Recorded Investment	'	'
Post-Modification Outstanding Recorded Investment	'	'
Troubled Debt Restructurings [Member]	'	'
Financing Receivable Modifications Number Of Contracts [Line Items]	'	'
Number of Contracts	13	35
Pre-Modification Outstanding Recorded Investment	1,676	6,752
Post-Modification Outstanding Recorded Investment	$1,676	$6,549

Loans_Receivable_Summary_of_Tr1

Loans Receivable - Summary of Troubled Debt Restructurings Subsequently Defaulted within One Year of Modification (Detail) (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Sep. 30, 2012
	Contract
Real Estate Loans [Member] | Residential [Member]	'
Financing Receivable Modifications Number Of Contracts [Line Items]	'
Number of Contracts	'
Recorded Investment	'
Real Estate Loans [Member] | Construction [Member]	'
Financing Receivable Modifications Number Of Contracts [Line Items]	'
Number of Contracts	'
Recorded Investment	'
Real Estate Loans [Member] | Commercial [Member]	'
Financing Receivable Modifications Number Of Contracts [Line Items]	'
Number of Contracts	1
Recorded Investment	41
Commercial [Member]	'
Financing Receivable Modifications Number Of Contracts [Line Items]	'
Number of Contracts	1
Recorded Investment	31
Obligations of States and Political Subdivisions [Member]	'
Financing Receivable Modifications Number Of Contracts [Line Items]	'
Number of Contracts	'
Recorded Investment	'
Home Equity Loans and Lines of Credit [Member]	'
Financing Receivable Modifications Number Of Contracts [Line Items]	'
Number of Contracts	'
Recorded Investment	'
Other [Member]	'
Financing Receivable Modifications Number Of Contracts [Line Items]	'
Number of Contracts	'
Recorded Investment	'
Troubled Debt Restructurings [Member]	'
Financing Receivable Modifications Number Of Contracts [Line Items]	'
Number of Contracts	2
Recorded Investment	$72

Premises_and_Equipment_Composi

Premises and Equipment - Composition of premises and Equipment (Detail) (USD $)	Sep. 30, 2013	Sep. 30, 2012
In Thousands, unless otherwise specified
Property Plant And Equipment Useful Life And Values [Abstract]	'	'
Land and land improvements	$5,930	$5,001
Buildings and leasehold improvements	14,102	14,772
Furniture, fixtures, and equipment	9,549	9,003
Construction in process	15	234
Premises and equipment Gross	29,596	29,010
Less accumulated depreciation	-13,849	-12,840
Total	$15,747	$16,170

Premises_and_Equipment_Additio

Premises and Equipment - Additional Information (Detail) (USD $)	12 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2011
Property Plant And Equipment Useful Life And Values [Abstract]	'	'	'
Depreciation Expense	$1,009,000	$885,000	$920,000

Deposits_Schedule_of_Depositsa

Deposits - Schedule of Depositsand Respective Weighted-Average Interest Rates by Major Classifications (Detail) (USD $)	Sep. 30, 2013	Sep. 30, 2012
In Thousands, unless otherwise specified
Deposits [Line Items]	'	'
Weighted Average Interest Rate, Noninterest-bearing demand accounts	'	'
Weighted Average Interest Rate, NOW accounts	0.04%	0.05%
Weighted Average Interest Rate, Money market accounts	0.20%	0.30%
Weighted Average Interest Rate, Savings and club accounts	0.05%	0.06%
Weighted Average Interest Rate, Certificates of deposit	1.26%	1.46%
Weighted Average Interest Rate, Total	0.80%	0.92%
Noninterest-bearing demand accounts	$58,795	$41,767
NOW accounts	99,857	109,923
Money market accounts	138,049	155,666
Savings and club accounts	110,189	102,143
Certificates of deposit	634,169	586,135
Total	1,041,059	995,634
Certificates of deposit	634,169	586,135
0.00 - 2.00% [Member]	'	'
Deposits [Line Items]	'	'
Weighted Average Interest Rate, Certificates of deposit	0.84%	0.93%
Certificates of deposit	496,310	423,426
Certificates of deposit	496,310	423,426
2.01 - 4.00% [Member]	'	'
Deposits [Line Items]	'	'
Weighted Average Interest Rate, Certificates of deposit	2.71%	2.72%
Certificates of deposit	133,579	150,692
Certificates of deposit	133,579	150,692
4.01 - 6.00% [Member]	'	'
Deposits [Line Items]	'	'
Weighted Average Interest Rate, Certificates of deposit	4.55%	4.46%
Certificates of deposit	4,280	12,017
Certificates of deposit	$4,280	$12,017

Deposits_Scheduled_Maturities_

Deposits - Scheduled Maturities of Certificates of Deposit (Detail) (USD $)	Sep. 30, 2013
In Thousands, unless otherwise specified
Fees And Commissions Income [Line Items]	'
Within three months	$129,805
Three through six months	97,656
Six through twelve months	84,691
Over twelve months	322,017
Total	$634,169

Deposits_Additional_Informatio

Deposits - Additional Information (Detail) (USD $)	12 Months Ended
	Sep. 30, 2013	Sep. 30, 2012
Fees And Commissions Income [Line Items]	'	'
Brokered deposits Total	$233,315,000	$156,823,000
Aggregate amount of time certificates of deposit	443,863,000	'
Aggregate amount of time certificates of deposit with a minimum denomination	$100,000	'

Deposits_Scheduled_Maturities_1

Deposits - Scheduled Maturities of Certificates of Deposit in Denominations (Detail) (USD $)	Sep. 30, 2013
In Thousands, unless otherwise specified
Fees And Commissions Income [Line Items]	'
Within three months	$82,817
Three through six months	71,392
Six through twelve months	43,247
Over twelve months	246,407
Total	$443,863

Deposits_Summary_of_Interest_E

Deposits - Summary of Interest Expense on Deposits (Detail) (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2011
Fees And Commissions Income [Line Items]	'	'	'
NOW accounts	$51	$24	$25
Money market accounts	327	326	551
Savings and club accounts	51	80	156
Certificates of deposits	6,979	7,056	6,754
Total	$7,408	$7,486	$7,486

ShortTerm_Borrowings_Additiona

Short-Term Borrowings - Additional Information (Detail) (USD $)	Sep. 30, 2013	Sep. 30, 2012
Debt Disclosure [Abstract]	'	'
Short-term borrowings	$23,000,000	$43,281,000
Advances on line of credit with the FHLB	0	20,281,000
Line of credit with the FHLB	75,000,000	'
Borrowing limit	$599,000,000	'

ShortTerm_Borrowings_Schedule_

Short-Term Borrowings - Schedule of Short-Term Borrowings (Detail) (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2011
Debt Disclosure [Abstract]	'	'	'
Balance at year-end	$23,000	$43,281	$4,000
Maximum amount outstanding at any month-end	84,500	43,281	28,086
Average balance outstanding during the year	$45,792	$11,712	$6,439
Weighted-average interest rate:	'	'	'
As of year-end	0.29%	0.30%	0.22%
Paid during the year	0.28%	0.27%	0.71%

Other_Borrowings_Contractual_M

Other Borrowings - Contractual Maturities of FHLB Long-term Advances and Securities Sold Under Agreements to Repurchase (Detail) (USD $)	Sep. 30, 2013	Sep. 30, 2012
In Thousands, unless otherwise specified
Federal Home Loan Bank Advances [Line Items]	'	'
FHLB bank amount of advances by branch	$129,260	$191,460
Convertible [Member]	'	'
Federal Home Loan Bank Advances [Line Items]	'	'
Maturity Range From	'2018	'
Maturity Range To	'2018	'
Weighted- Average Interest Rate	3.30%	'
Stated Interest Rate Ranged From	3.30%	'
Stated Interest Rate Ranged To	3.30%	'
FHLB bank amount of advances by branch	5,000	5,000
Fixed Rate [Member]	'	'
Federal Home Loan Bank Advances [Line Items]	'	'
Maturity Range From	'2013	'
Maturity Range To	'2020	'
Weighted- Average Interest Rate	1.90%	'
Stated Interest Rate Ranged From	0.63%	'
Stated Interest Rate Ranged To	4.10%	'
FHLB bank amount of advances by branch	107,260	133,960
Mid-Term [Member]	'	'
Federal Home Loan Bank Advances [Line Items]	'	'
Maturity Range From	'2014	'
Maturity Range To	'2016	'
Weighted- Average Interest Rate	0.71%	'
Stated Interest Rate Ranged From	0.46%	'
Stated Interest Rate Ranged To	0.87%	'
FHLB bank amount of advances by branch	7,000	7,500
Securities Sold Under Agreements to Repurchase [Member]	'	'
Federal Home Loan Bank Advances [Line Items]	'	'
Maturity Range From	'2014	'
Maturity Range To	'2014	'
Weighted- Average Interest Rate	2.75%	'
Stated Interest Rate Ranged From	2.63%	'
Stated Interest Rate Ranged To	2.86%	'
FHLB bank amount of advances by branch	$10,000	$45,000

Other_Borrowings_Maturities_of

Other Borrowings - Maturities of FHLB Long-term Advances and Securities Sold Under Agreements to Repurchase (Detail) (USD $)	Sep. 30, 2013	Sep. 30, 2012
In Thousands, unless otherwise specified
Fees And Commissions Income [Line Items]	'	'
2014	$33,710	'
2015	10,300	'
2016	28,300	'
2017	23,250	'
2018	20,000	'
2019 and thereafter	13,700	'
Total	$129,260	$191,460
Weighted Average Rate 2014	2.74%	'
Weighted Average Rate 2015	2.26%	'
Weighted Average Rate 2016	1.41%	'
Weighted Average Rate 2017	1.41%	'
Weighted Average Rate 2018	1.64%	'
Weighted Average Rate 2019 and thereafter	2.30%	'
Weighted Average Rate Total	1.95%	'

Other_Borrowings_Additional_In

Other Borrowings - Additional Information (Detail) (USD $)	12 Months Ended
	Sep. 30, 2013	Sep. 30, 2012
	Note
Fees And Commissions Income [Line Items]	'	'
Note payable	$5,000,000	'
Number of convertible notes	1	'
Mortgage-backed securities	$14,795,000	$56,947,000

Income_Taxes_Provision_for_Inc

Income Taxes - Provision for Income Taxes (Detail) (USD $)	3 Months Ended								12 Months Ended
In Thousands, unless otherwise specified	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2012	Sep. 30, 2012	Jun. 30, 2012	Mar. 31, 2012	Dec. 31, 2011	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2011
Income Tax Disclosure [Abstract]	'	'	'	'	'	'	'	'	'	'	'
Federal	'	'	'	'	'	'	'	'	$1,646	($1,807)	$2,130
State	'	'	'	'	'	'	'	'	'	15	7
Total current taxes	'	'	'	'	'	'	'	'	1,646	-1,792	2,137
Deferred income tax benefit	'	'	'	'	'	'	'	'	1,188	1,825	-274
Actual tax expense and effective rate, Amount	$292	$519	$662	$1,361	($673)	$311	$211	$184	$2,834	$33	$1,863

Income_Taxes_Schedule_of_Chang

Income Taxes - Schedule of Changes in Significant Portions of the Deferred Tax Assets and Deferred Tax Liabilities (Detail) (USD $)	Sep. 30, 2013	Sep. 30, 2012
In Thousands, unless otherwise specified
Deferred tax assets:	'	'
Allowance for loan losses	$2,742	$2,515
Charitable contributions carryover	'	12
Employee benefit plan	673	2,292
Investment losses subject to Section 382 limitation	5,622	5,895
Purchase accounting adjustment	789	2,287
Other	4,232	3,447
Total gross deferred tax assets	14,058	16,448
Deferred tax liabilities:	'	'
Pension plan	1,137	1,197
Net unrealized gain on securities	36	3,198
Mortgage servicing rights	131	125
Premises and equipment	462	175
Other	601	417
Total gross deferred tax liabilities	2,367	5,112
Net deferred tax assets	$11,183	$11,336

Income_Taxes_Additional_Inform

Income Taxes - Additional Information (Detail) (USD $)	12 Months Ended
	Sep. 30, 2013	Sep. 30, 2012
Income Tax Disclosure [Abstract]	'	'
Valuation allowance	$0	$0
Unrecognized Tax Benefits	0	'
Uncertain tax position	0	'
Effective income tax rate	11.50%	'
Retained earnings	4,600,000	'
Provision for Federal income tax	$0	'

Income_Taxes_Schedule_of_Recon

Income Taxes - Schedule of Reconciliation of the Federal Statutory Rate and the Effective Income Tax Rate (Detail) (USD $)	3 Months Ended								12 Months Ended
In Thousands, unless otherwise specified	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2012	Sep. 30, 2012	Jun. 30, 2012	Mar. 31, 2012	Dec. 31, 2011	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2011
Income Tax Disclosure [Abstract]	'	'	'	'	'	'	'	'	'	'	'
Provision at statutory rate, Amount	'	'	'	'	'	'	'	'	$3,963	$84	$2,421
Valuation allowance, Amount	'	'	'	'	'	'	'	'	'	247	39
Income from bank-owned life insurance, Amount	'	'	'	'	'	'	'	'	-322	-274	-217
Tax-exempt income, Amount	'	'	'	'	'	'	'	'	-388	-310	-371
Low-income housing credits, Amount	'	'	'	'	'	'	'	'	-289	-195	-175
Nondeductible merger expenses, Amount	'	'	'	'	'	'	'	'	'	163	'
Other, net, Amount	'	'	'	'	'	'	'	'	-130	318	166
Actual tax expense and effective rate, Amount	$292	$519	$662	$1,361	($673)	$311	$211	$184	$2,834	$33	$1,863
Provision at statutory rate, Percentage of pretax income	'	'	'	'	'	'	'	'	34.00%	34.00%	34.00%
Valuation allowance, Percentage of pretax income	'	'	'	'	'	'	'	'	'	99.60%	0.50%
Income from bank-owned life insurance, Percentage of pretax income	'	'	'	'	'	'	'	'	-2.80%	-110.70%	-3.00%
Tax-exempt income, Percentage of pretax income	'	'	'	'	'	'	'	'	-3.30%	-125.50%	-5.20%
Low-income housing credits, Percentage of pretax income	'	'	'	'	'	'	'	'	-2.50%	-78.70%	-2.50%
Nondeductible merger expenses, Percentage of pretax income	'	'	'	'	'	'	'	'	'	65.80%	'
Other, net, Percentage of pretax income	'	'	'	'	'	'	'	'	-1.10%	128.80%	2.30%
Actual tax expense and effective rate, Percentage of pretax income	'	'	'	'	'	'	'	'	24.30%	13.30%	26.10%

Commitments_Components_of_Off_

Commitments - Components of Off Balance Sheet Commitments (Detail) (USD $)	Sep. 30, 2013	Sep. 30, 2012
In Thousands, unless otherwise specified
Commitments to Extend Credit [Member]	'	'
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]	'	'
Off balance sheet commitments	$22,333	$21,461
Standby Letters of Credit [Member]	'	'
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]	'	'
Off balance sheet commitments	4,769	3,244
Unfunded Lines of Credit [Member]	'	'
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]	'	'
Off balance sheet commitments	$42,016	$38,750

Commitments_Additional_Informa

Commitments - Additional Information (Detail)	12 Months Ended
	Sep. 30, 2013
Commitments And Contingencies Disclosure [Abstract]	'
Interest Rate, Fixed Rate Commitments Minimum	3.25%
Interest Rate, Fixed Rate Commitments Maximum	5.25%
Contract Maturity Period	'Less than one year
Coverage Period for Instrument	'1 year

Lease_Commitments_and_Total_Re2

Lease Commitments and Total Rental Expense - Future Minimum Lease Payments By Year and in the Aggregate (Detail) (USD $)	Sep. 30, 2013
In Thousands, unless otherwise specified
Commitments And Contingencies Disclosure [Abstract]	'
2014	$524
2015	451
2016	391
2017	230
2018	128
2019 and beyond	1,151
Total	$2,875

Lease_Commitments_and_Total_Re3

Lease Commitments and Total Rental Expense - Additional Information (Detail) (USD $)	12 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2011
	Office
Commitments And Contingencies Disclosure [Abstract]	'	'	'
Total rental expenses	$913,000	$835,000	$760,000
Number of offices	6	'	'

Employee_Benefits_Additional_I

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

12 Months Ended

12 Months Ended

1 Months Ended

12 Months Ended

Sep. 30, 2013

Sep. 30, 2012

Sep. 30, 2011

Sep. 30, 2013

Sep. 30, 2013

Sep. 30, 2013

Sep. 30, 2013

Apr. 30, 2013

Sep. 30, 2013

Sep. 30, 2013

Sep. 30, 2013

Sep. 30, 2013

Age

Equity Incentive Plan [Member]

Equity [Member]

Cash and Fixed Income [Member]

Stock Option [Member]

Restricted Stock [Member]

Restricted Stock [Member]

Restricted Stock [Member]

Non Qualified Stock Option [Member]

Incentive Stock Option [Member]

2013 [Member]

Compensation Related Costs Disclosure [Line Items]

'

'

'

'

'

'

'

'

'

'

'

'

Service Period

'1 year

'

'

'

'

'

'

'

'

'

'

'

Age of Employee

21

'

'

'

'

'

'

'

'

'

'

'

Acquired Shares of the Company's Stock

1,358,472

'

'

'

'

'

'

'

'

'

'

'

Outstanding loan interest

3.25%

'

'

'

'

'

'

'

'

'

'

'

Annual payment of principal and interest

$718,000

'

'

'

'

'

'

'

'

'

'

'

Recognized ESOP expense

485,000

469,000

555,000

'

'

'

'

'

'

'

'

'

Common stock issuance, Grant

'

'

'

2,377,326

'

'

'

'

'

'

'

'

Number of available shares

'

'

'

'

'

'

1,698,090

'

679,236

'

'

'

Shares granted

'

'

'

'

'

'

'

30,000

590,320

'

1,140,469

317,910

Option vesting period (in years)

'5 years

'

'

'

'

'

'

'

'

'

'

'

Option expiration date (in years)

'10 years

'

'

'

'

'

'

'

'

'

'

'

Restricted shares vesting period

'

'

'

'

'

'

'

'

'5 years

'18 months

'

'

Share-based compensation expense

1,516,000

2,151,000

2,162,000

'

'

'

'

'

'

'

'

'

Stock option expense

458,000

687,000

705,000

'

'

'

'

'

'

'

'

'

Restricted stock expense

1,100,000

1,500,000

1,500,000

'

'

'

'

'

'

'

'

'

Non-vested option outstanding, shares

1,458,379

1,458,379

'

'

'

'

'

'

14,995

'

'

'

Expected future expense

'

'

'

'

'

'

'

'

219,000

'

'

'

Remaining vesting period

'

'

'

'

'

'

'

'

'1 year

'

'

'

Accumulated benefit obligation

11,349,000

11,746,000

'

'

'

'

'

'

'

'

'

'

Estimated net loss

28,000

392,000

'

'

'

'

'

'

'

'

'

'

Target allocation of cash and fixed income

'

'

'

'

65.00%

35.00%

'

'

'

'

'

'

Expected contribution of bank

600,000

'

'

'

'

'

'

'

'

'

'

'

Defined benefit pension 401(k) plan related expenses

0

0

65,000

'

'

'

'

'

'

'

'

'

Supplemental Executive Retirement Plan Minimum Period

'No less than 192 months

'

'

'

'

'

'

'

'

'

'

'

Estimated Present Value Of Benefits Under Plan

$680,000

$677,000

'

'

'

'

'

'

'

'

'

'

Supplemental executive retirement plan discounting rate for present value calculation

6.25%

'

'

'

'

'

'

'

'

'

'

'

Employee_Benefits_Components_o

Employee Benefits - Components of the ESOP Shares (Detail) (USD $)	Sep. 30, 2013	Sep. 30, 2012
In Thousands, except Share data, unless otherwise specified
Compensation Related Costs [Abstract]	'	'
Allocated shares	271,694	226,412
Shares committed to be released	33,962	33,962
Unreleased shares	1,052,816	1,098,098
Total ESOP shares	1,358,472	1,358,472
Fair value of unreleased shares	$10,970	$11,409

Employee_Benefits_Summary_of_t

Employee Benefits - Summary of the Company's Stock Option Activity (Detail) (USD $)	12 Months Ended
	Sep. 30, 2013	Sep. 30, 2012
Compensation Related Costs [Abstract]	'	'
Number of Stock Options, Outstanding, September 30, 2012	1,458,379	'
Number of Stock Options, Granted	'	'
Number of Stock Options, Exercised	'	'
Number of Stock Options, Forfeited	'	'
Number of Stock Options, Outstanding, September 30, 2013	1,458,379	1,458,379
Number of Stock Options, Exercisable at year-end	1,458,379	'
Weighted-average Exercise Price, Outstanding, September 30, 2012	$12.35	'
Weighted-average Exercise Price, Granted	'	'
Weighted-average Exercise Price, Exercised	'	'
Weighted-average Exercise Price, Forfeited	'	'
Weighted-average Exercise Price, Outstanding, September 30, 2013	$12.35	$12.35
Weighted-average Exercise Price, Exercisable at year-end	$12.35	'
Weighted-average Remaining Contractual Term (in years), Outstanding, September 30, 2012	'4 years 8 months 1 day	'5 years 8 months 1 day
Weighted-average Remaining Contractual Term (in years), Granted	'0 years	'
Weighted-average Remaining Contractual Term (in years), Exercised	'0 years	'
Weighted-average Remaining Contractual Term (in years), Forfeited	'0 years	'
Weighted-average Remaining Contractual Term (in years), Outstanding, September 30, 2013	'4 years 8 months 1 day	'5 years 8 months 1 day
Weighted-average Remaining Contractual Term (in years), Exercisable at year-end	'4 years 8 months 1 day	'
Aggregate Intrinsic Value, Outstanding, September 30, 2012	'	'
Aggregate Intrinsic Value, Granted	'	'
Aggregate Intrinsic Value, Exercised	'	'
Aggregate Intrinsic Value, Forfeited	'	'
Aggregate Intrinsic Value, Outstanding, September 30, 2013	'	'
Aggregate Intrinsic Value, Exercisable at year-end	'	'

Employee_Benefits_Summary_of_t1

Employee Benefits - Summary of the Status of the Company's Restricted Stock (Detail) (USD $)	12 Months Ended
	Sep. 30, 2013
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]	'
Number of Restricted Stock, Granted	'
Number of Restricted Stock, Forfeited	'
Weighted-average Grant Date Fair Value, Forfeited	'
Restricted Stock [Member]	'
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]	'
Number of Restricted Stock, Nonvested at September 30, 2012	115,212
Number of Restricted Stock, Granted	30,000
Number of Restricted Stock, Vested	-130,217
Number of Restricted Stock, Forfeited	'
Number of Restricted Stock, Nonvested at September 30, 2013	14,995
Weighted-average Grant Date Fair Value, Nonvested at September 30, 2012	$12.35
Weighted-average Grant Date Fair Value, Granted	$10.94
Weighted-average Grant Date Fair Value, Vested	$12.19
Weighted-average Grant Date Fair Value, Forfeited	'
Weighted-average Grant Date Fair Value, Nonvested at September 30, 2013	$10.94

Employee_Benefits_Summary_of_C

Employee Benefits - Summary of Change in Plan Assets and Benefit Obligation (Detail) (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2011
Compensation Related Costs [Abstract]	'	'	'
Benefit obligation at beginning of year	$17,264	$15,024	'
Service cost	702	597	533
Interest cost	716	713	698
Actuarial gains	-3,588	1,043	'
Benefits paid	-97	-113	'
Benefit obligation at end of year	14,997	17,264	15,024
Fair value of plan assets at beginning of year	14,042	11,457	'
Actual return on plan assets	1,818	2,338	'
Contributions	600	360	'
Benefits paid	-97	-113	'
Fair value of plan assets at end of year	16,363	14,042	11,457
Funded status	$1,366	($3,222)	'

Employee_Benefits_Summary_of_t2

Employee Benefits - Summary of the Components of Net Periodic Pension Cost (Detail) (USD $)	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2011
In Thousands, unless otherwise specified
Compensation Related Costs [Abstract]	'	'	'
Net gain	$1,979	$6,742	$7,697
Prior service cost	'	'	'
Total	$1,979	$6,742	$7,697

Employee_Benefits_Summary_of_t3

Employee Benefits - Summary of the Components of Net Periodic Benefit Cost (Detail) (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2011
Compensation Related Costs [Abstract]	'	'	'
Service cost	$702	$597	$533
Interest cost	716	713	698
Expected return on plan assets	-1,034	-814	-769
Amortization of prior service cost	'	'	8
Amortization of unrecognized loss	392	475	404
Net periodic benefit cost	$776	$972	$874

Employee_Benefits_Schedule_of_

Employee Benefits - Schedule of Weighted-Average Assumptions (Detail)	Sep. 30, 2013	Sep. 30, 2012
Compensation Related Costs [Abstract]	'	'
Discount rate	5.10%	4.15%
Rate of compensation increase	4.00%	4.00%

Employee_Benefits_Schedule_of_1

Employee Benefits - Schedule of Assumptions Used to Determine Net Periodic Benefit Cost (Detail)	12 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2011
Compensation Related Costs [Abstract]	'	'	'
Discount rate	4.15%	4.75%	5.25%
Expected long-term return on plan assets	7.00%	7.00%	7.00%
Rate of compensation increase	4.00%	5.00%	5.00%

Employee_Benefits_Summary_of_t4

Employee Benefits - Summary of the Plan's Financial Assets at Fair Value, Within the Fair Value Hierarchy (Detail) (USD $)	Sep. 30, 2013	Sep. 30, 2012
In Thousands, unless otherwise specified
Defined Benefit Plan Disclosure [Line Items]	'	'
Total assets at fair value	$16,363	$14,042
Investment in Collective Trusts Fixed Income [Member]	'	'
Defined Benefit Plan Disclosure [Line Items]	'	'
Total assets at fair value	5,722	4,884
Investment in Collective Trusts Equity [Member]	'	'
Defined Benefit Plan Disclosure [Line Items]	'	'
Total assets at fair value	10,631	9,142
Investment in Short-Term Investments [Member]	'	'
Defined Benefit Plan Disclosure [Line Items]	'	'
Total assets at fair value	10	16
Level I [Member]	'	'
Defined Benefit Plan Disclosure [Line Items]	'	'
Total assets at fair value	'	'
Level I [Member] | Investment in Collective Trusts Fixed Income [Member]	'	'
Defined Benefit Plan Disclosure [Line Items]	'	'
Total assets at fair value	'	'
Level I [Member] | Investment in Collective Trusts Equity [Member]	'	'
Defined Benefit Plan Disclosure [Line Items]	'	'
Total assets at fair value	'	'
Level I [Member] | Investment in Short-Term Investments [Member]	'	'
Defined Benefit Plan Disclosure [Line Items]	'	'
Total assets at fair value	'	'
Level II [Member]	'	'
Defined Benefit Plan Disclosure [Line Items]	'	'
Total assets at fair value	16,363	14,042
Level II [Member] | Investment in Collective Trusts Fixed Income [Member]	'	'
Defined Benefit Plan Disclosure [Line Items]	'	'
Total assets at fair value	5,722	4,884
Level II [Member] | Investment in Collective Trusts Equity [Member]	'	'
Defined Benefit Plan Disclosure [Line Items]	'	'
Total assets at fair value	10,631	9,142
Level II [Member] | Investment in Short-Term Investments [Member]	'	'
Defined Benefit Plan Disclosure [Line Items]	'	'
Total assets at fair value	10	16
Level III [Member]	'	'
Defined Benefit Plan Disclosure [Line Items]	'	'
Total assets at fair value	'	'
Level III [Member] | Investment in Collective Trusts Fixed Income [Member]	'	'
Defined Benefit Plan Disclosure [Line Items]	'	'
Total assets at fair value	'	'
Level III [Member] | Investment in Collective Trusts Equity [Member]	'	'
Defined Benefit Plan Disclosure [Line Items]	'	'
Total assets at fair value	'	'
Level III [Member] | Investment in Short-Term Investments [Member]	'	'
Defined Benefit Plan Disclosure [Line Items]	'	'
Total assets at fair value	'	'

Employee_Benefits_The_Banks_De

Employee Benefits - The Bank's Defined Benefit Pension Plan Weighted-Average Asset Allocations (Detail)	Sep. 30, 2013	Sep. 30, 2012
Defined Benefit Plan Disclosure [Line Items]	'	'
Total Defined Benefit Plan, Actual Plan Asset Allocations	100.00%	100.00%
Cash and Fixed Income Securities [Member]	'	'
Defined Benefit Plan Disclosure [Line Items]	'	'
Total Defined Benefit Plan, Actual Plan Asset Allocations	35.00%	34.80%
Equity Securities [Member]	'	'
Defined Benefit Plan Disclosure [Line Items]	'	'
Total Defined Benefit Plan, Actual Plan Asset Allocations	64.90%	65.10%
Other [Member]	'	'
Defined Benefit Plan Disclosure [Line Items]	'	'
Total Defined Benefit Plan, Actual Plan Asset Allocations	0.10%	0.10%

Employee_Benefits_Summary_of_E

Employee Benefits - Summary of Estimated Future Benefit Payments (Detail) (USD $)	Sep. 30, 2013
In Thousands, unless otherwise specified
Compensation Related Costs [Abstract]	'
2014	$72
2015	79
2016	85
2017	108
2018	298
2019-2023	$3,963

Regulatory_Restrictions_Additi

Regulatory Restrictions - Additional Information (Detail) (USD $)	Sep. 30, 2013	Sep. 30, 2012
Fees And Commissions Income [Line Items]	'	'
Reserve funds deposit	$3,476,000	$9,003,000

Regulatory_Capital_Requirement2

Regulatory Capital Requirements - Additional Information (Detail)	Sep. 30, 2013	Sep. 30, 2012
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]	'	'
Total risk-based ratio	10.00%	10.00%
Tier 1 risk-based ratio	4.00%	4.00%
Minimum [Member]	'	'
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]	'	'
Total risk-based ratio	10.00%	10.00%
Tier 1 risk-based ratio	6.00%	6.00%
Core capital ratio	5.00%	5.00%
Tangible equity capital ratio	1.50%	1.50%

Regulatory_Capital_Requirement3

Regulatory Capital Requirements - Reconciliation of Bank's Capital under U.S. Generally Accepted Accounting Principles to Regulatory Capital (Detail) (USD $)	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2011	Sep. 30, 2010
In Thousands, unless otherwise specified
Fees And Commissions Income [Line Items]	'	'	'	'
Total stockholders' equity	$166,446	$175,411	$161,679	$171,623
Accumulated other comprehensive (income) loss	-1,235	1,758	586	'
Unrealized loss on equity securities	-10	'	'	'
Goodwill and certain other intangible assets	-10,930	-11,812	'	'
Disallowed servicing assets	-37	-36	'	'
Tier I, core, and tangible capital	151,959	155,126	'	'
Allowance for loan losses	7,297	6,402	'	'
Unrealized gains on equity securities	'	4	'	'
Total risk-based capital	$159,256	$161,532	'	'

Regulatory_Capital_Requirement4

Regulatory Capital Requirements - Bank's Actual Capital Ratios (Detail) (USD $)	Sep. 30, 2013	Sep. 30, 2012
In Thousands, unless otherwise specified
Fees And Commissions Income [Line Items]	'	'
Actual, Amount	$159,256	$161,532
For Capital Adequacy Purposes, Amount	62,603	65,962
To Be Well Capitalized, Amount	78,254	82,453
Actual, Amount	151,959	155,126
For Capital Adequacy Purposes, Amount	31,301	32,981
To Be Well Capitalized, Amount	46,952	49,972
Actual, Amount	151,959	155,126
For Capital Adequacy Purposes, Amount	54,337	56,001
To Be Well Capitalized, Amount	$67,921	$70,002
Actual, Ratio	20.40%	19.60%
For Capital Adequacy Purposes, Ratio	8.00%	8.00%
To Be Well Capitalized, Ratio	10.00%	10.00%
Actual, Ratio	19.40%	18.80%
For Capital Adequacy Purposes, Ratio	4.00%	4.00%
To Be Well Capitalized, Ratio	6.00%	6.00%
Actual, Ratio	11.20%	11.10%
For Capital Adequacy Purposes, Ratio	4.00%	4.00%
To Be Well Capitalized, Ratio	5.00%	5.00%

Fair_Value_Measurements_Schedu

Fair Value Measurements - Schedule of Securities, Other Real Estate Owned and Impaired Loans Measured at Fair Value (Detail) (USD $)	Sep. 30, 2013	Sep. 30, 2012
In Thousands, unless otherwise specified
Investment securities available for sale	'	'
Total securities	$315,622	$329,585
Foreclosed real estate owned	2,111	2,998
Impaired loans	36,407	32,520
Level I [Member]	'	'
Investment securities available for sale	'	'
Total securities	2,015	3,378
Foreclosed real estate owned	'	'
Impaired loans	'	'
Level II [Member]	'	'
Investment securities available for sale	'	'
Total securities	311,807	324,467
Foreclosed real estate owned	'	'
Impaired loans	'	'
Level III [Member]	'	'
Investment securities available for sale	'	'
Total securities	1,800	1,740
Foreclosed real estate owned	2,111	2,998
Impaired loans	36,407	32,520
Mortgage-Backed Securities [Member]	'	'
Investment securities available for sale	'	'
Total securities	217,837	215,804
Mortgage-Backed Securities [Member] | Level II [Member]	'	'
Investment securities available for sale	'	'
Total securities	217,837	215,804
Mortgage-Backed Securities [Member] | Level III [Member]	'	'
Investment securities available for sale	'	'
Total securities	'	'
Obligations of States and Political Subdivisions [Member]	'	'
Investment securities available for sale	'	'
Total securities	23,909	19,517
Obligations of States and Political Subdivisions [Member] | Level I [Member]	'	'
Investment securities available for sale	'	'
Total securities	'	'
Obligations of States and Political Subdivisions [Member] | Level II [Member]	'	'
Investment securities available for sale	'	'
Total securities	23,909	19,517
Obligations of States and Political Subdivisions [Member] | Level III [Member]	'	'
Investment securities available for sale	'	'
Total securities	'	'
U.S. Government Agency Securities [Member]	'	'
Investment securities available for sale	'	'
Total securities	52,520	74,484
U.S. Government Agency Securities [Member] | Level I [Member]	'	'
Investment securities available for sale	'	'
Total securities	'	'
U.S. Government Agency Securities [Member] | Level II [Member]	'	'
Investment securities available for sale	'	'
Total securities	52,520	74,484
U.S. Government Agency Securities [Member] | Level III [Member]	'	'
Investment securities available for sale	'	'
Total securities	'	'
Corporate Obligations [Member]	'	'
Investment securities available for sale	'	'
Total securities	12,773	8,657
Corporate Obligations [Member] | Level I [Member]	'	'
Investment securities available for sale	'	'
Total securities	'	'
Corporate Obligations [Member] | Level II [Member]	'	'
Investment securities available for sale	'	'
Total securities	12,773	8,657
Corporate Obligations [Member] | Level III [Member]	'	'
Investment securities available for sale	'	'
Total securities	'	'
Trust-Preferred Securities [Member]	'	'
Investment securities available for sale	'	'
Total securities	5,414	6,233
Trust-Preferred Securities [Member] | Level I [Member]	'	'
Investment securities available for sale	'	'
Total securities	'	'
Trust-Preferred Securities [Member] | Level II [Member]	'	'
Investment securities available for sale	'	'
Total securities	3,614	4,493
Trust-Preferred Securities [Member] | Level III [Member]	'	'
Investment securities available for sale	'	'
Total securities	1,800	1,740
Other Debt Securities [Member]	'	'
Investment securities available for sale	'	'
Total securities	1,154	1,512
Other Debt Securities [Member] | Level I [Member]	'	'
Investment securities available for sale	'	'
Total securities	'	'
Other Debt Securities [Member] | Level II [Member]	'	'
Investment securities available for sale	'	'
Total securities	1,154	1,512
Other Debt Securities [Member] | Level III [Member]	'	'
Investment securities available for sale	'	'
Total securities	'	'
Equity Securities [Member]	'	'
Investment securities available for sale	'	'
Total securities	2,015	3,378
Equity Securities [Member] | Level I [Member]	'	'
Investment securities available for sale	'	'
Total securities	2,015	3,378
Equity Securities [Member] | Level III [Member]	'	'
Investment securities available for sale	'	'
Total securities	'	'

Fair_Value_Measurement_Schedul

Fair Value Measurement - Schedule of Changes in Fair Value of Level III Investments (Detail) (Level III [Member], USD $)	12 Months Ended
In Thousands, unless otherwise specified	Sep. 30, 2013	Sep. 30, 2012
Level III [Member]	'	'
Fair Value Of Assets And Liabilities Measured On Non Recurring Basis [Line Items]	'	'
Beginning balance	$1,740	'
Purchases, sales, issuances, settlements, net	'	1,528
Total unrealized gain:	'	'
Included in earnings	'	'
Included in other comprehensive income	60	212
Transfers in and/or out of Level III	'	'
Ending Balance	$1,800	$1,740

Fair_Value_Measurements_Additi

Fair Value Measurements - Additional Information (Detail) (USD $)	12 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2011
	Loans
Fair Value Disclosures [Abstract]	'	'	'
Number of impaired loans	233	'	'
Impaired loans, carrying value	$37,200,000	'	'
Impaired loans, valuation allowance	819,000	'	'
Impaired loans, net fair value	36,400,000	'	'
Fair value consists of the loan receivable	951,120,000	997,685,000	'
Impaired financing valuation allowances	$819,000	$952,000	$1,160,000

Fair_Value_Measurement_Summary

Fair Value Measurement - Summary of Additional Quantitative Information about Assets Measured at Fair Value on a Nonrecurring Basis (Detail) (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Sep. 30, 2013	Sep. 30, 2012
Fair Value Of Assets And Liabilities Measured On Non Recurring Basis [Line Items]	'	'
Fair Value Estimate	$16,363	$14,042
Impaired Loans [Member]	'	'
Fair Value Of Assets And Liabilities Measured On Non Recurring Basis [Line Items]	'	'
Fair Value Estimate	36,407	32,520
Unobservable Input	'Appraisal adjustments (2)	'Appraisal adjustments (2)
Impaired Loans [Member] | Minimum [Member]	'	'
Fair Value Of Assets And Liabilities Measured On Non Recurring Basis [Line Items]	'	'
Fair value input appraisal adjustments	0.00%	0.00%
Impaired Loans [Member] | Maximum [Member]	'	'
Fair Value Of Assets And Liabilities Measured On Non Recurring Basis [Line Items]	'	'
Fair value input appraisal adjustments	30.00%	30.00%
Foreclosed Real Estate Owned [Member]	'	'
Fair Value Of Assets And Liabilities Measured On Non Recurring Basis [Line Items]	'	'
Fair Value Estimate	$2,111	$2,998
Unobservable Input	'Appraisal adjustments (2)	'Appraisal adjustments (2)
Foreclosed Real Estate Owned [Member] | Minimum [Member]	'	'
Fair Value Of Assets And Liabilities Measured On Non Recurring Basis [Line Items]	'	'
Fair value input appraisal adjustments	0.00%	0.00%
Foreclosed Real Estate Owned [Member] | Maximum [Member]	'	'
Fair Value Of Assets And Liabilities Measured On Non Recurring Basis [Line Items]	'	'
Fair value input appraisal adjustments	30.00%	30.00%
Appraisal of Collateral [Member] | Impaired Loans [Member]	'	'
Fair Value Of Assets And Liabilities Measured On Non Recurring Basis [Line Items]	'	'
Valuation Techniques	'Appraisal of collateral (1)	'Appraisal of collateral (1)
Appraisal of Collateral [Member] | Foreclosed Real Estate Owned [Member]	'	'
Fair Value Of Assets And Liabilities Measured On Non Recurring Basis [Line Items]	'	'
Valuation Techniques	'Appraisal of collateral (1), (3)	'Appraisal of collateral (1), (3)

Fair_Value_of_Financial_Instru2

Fair Value of Financial Instruments - Schedule of Fair Values of the Company's Financial Instruments (Detail) (USD $)	Sep. 30, 2013	Sep. 30, 2012
In Thousands, unless otherwise specified
Financial assets:	'	'
Cash and cash equivalents	$26,648	$15,550
Investment and mortgage-backed securities available for sale	315,622	329,585
Loans receivable, net	951,120	997,685
Accrued interest receivable	4,413	4,929
Regulatory stock	9,415	21,914
Mortgage servicing rights	382	365
Bank-owned life insurance	28,797	27,848
Financial liabilities:	'	'
Deposits	1,045,400	1,006,527
Short-term borrowings	23,000	43,281
Other borrowings	129,260	191,460
Advances by borrowers for taxes and insurance	4,962	3,432
Accrued interest payable	833	1,128
Carrying Value [Member]	'	'
Financial assets:	'	'
Cash and cash equivalents	26,648	15,550
Investment and mortgage-backed securities available for sale	315,622	329,585
Loans receivable, net	928,230	950,355
Accrued interest receivable	4,413	4,929
Regulatory stock	9,415	21,914
Mortgage servicing rights	382	365
Bank-owned life insurance	28,797	27,848
Financial liabilities:	'	'
Deposits	1,041,059	995,634
Short-term borrowings	23,000	43,281
Other borrowings	129,260	191,460
Advances by borrowers for taxes and insurance	4,962	3,432
Accrued interest payable	833	1,128
Level I [Member]	'	'
Financial assets:	'	'
Cash and cash equivalents	26,648	15,550
Investment and mortgage-backed securities available for sale	2,015	3,378
Loans receivable, net	'	'
Accrued interest receivable	4,413	4,929
Regulatory stock	9,415	21,914
Mortgage servicing rights	'	'
Bank-owned life insurance	28,797	27,848
Financial liabilities:	'	'
Deposits	406,890	409,499
Short-term borrowings	23,000	43,281
Other borrowings	'	'
Advances by borrowers for taxes and insurance	4,962	3,432
Accrued interest payable	833	1,128
Level II [Member]	'	'
Financial assets:	'	'
Cash and cash equivalents	'	'
Investment and mortgage-backed securities available for sale	311,807	324,467
Loans receivable, net	'	'
Accrued interest receivable	'	'
Regulatory stock	'	'
Mortgage servicing rights	'	'
Bank-owned life insurance	'	'
Financial liabilities:	'	'
Deposits	'	597,028
Short-term borrowings	'	'
Other borrowings	'	195,636
Advances by borrowers for taxes and insurance	'	'
Accrued interest payable	'	'
Level III [Member]	'	'
Financial assets:	'	'
Cash and cash equivalents	'	'
Investment and mortgage-backed securities available for sale	1,800	1,740
Loans receivable, net	951,120	997,685
Accrued interest receivable	'	'
Regulatory stock	'	'
Mortgage servicing rights	382	365
Bank-owned life insurance	'	'
Financial liabilities:	'	'
Deposits	638,510	'
Short-term borrowings	'	'
Other borrowings	124,504	'
Advances by borrowers for taxes and insurance	'	'
Accrued interest payable	'	'

Accumulated_Other_Comprehensiv1

Accumulated Other Comprehensive Income - Activity in Accumulated Other Comprehensive Income (Detail) (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2011
Schedule of Available-for-sale Securities [Line Items]	'	'	'
Beginning Balance, Defined Benefit Pension Plan	($4,449)	($5,080)	'
Other comprehensive income before reclassifications, Defined Benefit Pension Plan	'	'	'
Amounts reclassified from accumulated other comprehensive income, Defined Benefit Pension Plan	3,144	631	'
Period change, Defined Benefit Pension Plan	3,144	631	'
Ending Balance, Defined Benefit Pension Plan	-1,306	-4,449	-5,080
Beginning Balance, Unrealized Gains (Losses) on Securities Available for Sale	6,207	5,666	'
Other comprehensive income before reclassifications, Unrealized Gains (Losses) on Securities Available for Sale	-5,643	767	'
Amounts reclassified from accumulated other comprehensive income, Unrealized Gains (Losses) on Securities Available for Sale	-494	-226	'
Period change, Unrealized Gains (Losses) on Securities Available for Sale	-6,137	541	'
Ending Balance, Unrealized Gains (Losses) on Securities Available for Sale	71	6,207	5,666
Beginning Balance, Accumulated Other Comprehensive Income	1,758	586	'
Other comprehensive income before reclassifications	-5,643	767	'
Amounts reclassified from accumulated other comprehensive income	2,650	405	'
Period change	-2,993	1,172	'
Ending Balance, Accumulated Other Comprehensive Income	-1,235	1,758	586
Securities available for sale, Net securities gains reclassified into earnings	749	343	778
Securities available for sale, Related income tax expense	255	117	264
Accumulated Other Comprehensive Income (Loss) [Member]	'	'	'
Schedule of Available-for-sale Securities [Line Items]	'	'	'
Amounts reclassified from accumulated other comprehensive income, Defined Benefit Pension Plan	-3,144	-631	'
Amounts reclassified from accumulated other comprehensive income, Unrealized Gains (Losses) on Securities Available for Sale	494	226	'
Amounts reclassified from accumulated other comprehensive income	-2,650	-405	'
Securities available for sale, Net securities gains reclassified into earnings	749	343	'
Securities available for sale, Related income tax expense	-255	-117	'
Defined benefit pension plan, Amortization of net loss and prior service costs	-4,763	-956	'
Defined benefit pension plan, Related income tax expense	$1,619	$325	'

Accumulated_Other_Comprehensiv2

Accumulated Other Comprehensive Income - Activity in Accumulated Other Comprehensive Income (Parenthetical) (Detail)	12 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2011
Text Block [Abstract]	'	'	'
Related income tax expense or benefit	34.00%	34.00%	34.00%

Parent_Company_Condensed_Balan

Parent Company - Condensed Balance Sheet (Detail) (USD $)	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2011	Sep. 30, 2010
In Thousands, unless otherwise specified
ASSETS	'	'	'	'
Cash and due from banks	$22,393	$11,034	'	'
Certificates of deposit	1,767	1,266	'	'
Investment securities available for sale	315,622	329,585	'	'
Premises and equipment, net	15,747	16,170	'	'
Other assets	21,512	29,766	'	'
TOTAL ASSETS	1,372,315	1,418,786	'	'
LIABILITIES AND STOCKHOLDERS' EQUITY	'	'	'	'
Other liabilities	7,588	9,568	'	'
Stockholders' equity	166,446	175,411	161,679	171,623
TOTAL LIABILITIES AND STOCKHOLDERS' EQUITY	1,372,315	1,418,786	'	'
Parent Company [Member]	'	'	'	'
ASSETS	'	'	'	'
Cash and due from banks	3,195	3,650	'	'
Certificates of deposit	17	16	'	'
Investment securities available for sale	25	1,280	'	'
Investment in subsidiary	161,701	168,082	'	'
Premises and equipment, net	1,152	1,727	'	'
Other assets	1,211	1,505	'	'
TOTAL ASSETS	167,301	176,260	'	'
LIABILITIES AND STOCKHOLDERS' EQUITY	'	'	'	'
Other liabilities	855	849	'	'
Stockholders' equity	166,446	175,411	'	'
TOTAL LIABILITIES AND STOCKHOLDERS' EQUITY	$167,301	$176,260	'	'

Parent_Company_Condensed_State

Parent Company - Condensed Statement of Income (Detail) (USD $)	3 Months Ended								12 Months Ended
In Thousands, unless otherwise specified	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2012	Sep. 30, 2012	Jun. 30, 2012	Mar. 31, 2012	Dec. 31, 2011	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2011
INCOME	'	'	'	'	'	'	'	'	'	'	'
Interest income	$9,393	$9,849	$9,884	$10,719	$8,853	$6,736	$6,771	$6,708	$39,845	$29,068	$28,896
Net gains on sale of investments	'	'	'	'	'	'	'	'	749	343	778
EXPENSES	'	'	'	'	'	'	'	'	'	'	'
Interest expense	2,578	2,642	2,806	3,231	3,908	3,840	4,063	4,321	11,257	16,132	18,280
Professional fees	'	'	'	'	'	'	'	'	1,868	1,368	1,488
Other	'	'	'	'	'	'	'	'	2,746	2,348	2,154
Total noninterest expense	8,013	8,154	8,790	7,505	12,943	6,526	6,874	6,662	32,462	33,005	26,045
Income (loss) before income taxes	2,320	2,395	2,702	4,240	-2,797	1,105	870	1,070	11,657	248	7,121
Income tax expense (benefit)	292	519	662	1,361	-673	311	211	184	2,834	33	1,863
Net income	2,028	1,876	2,040	2,879	-2,124	794	659	886	8,823	215	5,258
Parent Company [Member]	'	'	'	'	'	'	'	'	'	'	'
INCOME	'	'	'	'	'	'	'	'	'	'	'
Interest income	'	'	'	'	'	'	'	'	408	403	473
Net gains on sale of investments	'	'	'	'	'	'	'	'	30	'	99
Dividends	'	'	'	'	'	'	'	'	15,000	25,000	10,000
Total income	'	'	'	'	'	'	'	'	15,438	25,403	10,572
EXPENSES	'	'	'	'	'	'	'	'	'	'	'
Interest expense	'	'	'	'	'	'	'	'	'	101	'
Professional fees	'	'	'	'	'	'	'	'	505	1,741	303
Other	'	'	'	'	'	'	'	'	527	132	63
Total noninterest expense	'	'	'	'	'	'	'	'	1,032	1,974	366
Income (loss) before income taxes	'	'	'	'	'	'	'	'	14,406	23,429	10,206
Income tax expense (benefit)	'	'	'	'	'	'	'	'	'	-32	94
Income before equity in undistributed net earnings of subsidiary	'	'	'	'	'	'	'	'	14,406	23,461	10,112
Equity in undistributed net earnings of subsidiary	'	'	'	'	'	'	'	'	-5,583	-23,246	-4,854
Net income	'	'	'	'	'	'	'	'	$8,823	$215	$5,258

Parent_Company_Condensed_State1

Parent Company - Condensed Statement of Cash Flows (Detail) (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2011
OPERATING ACTIVITIES	'	'	'
Net income	$8,823	$215	$5,258
Adjustments to reconcile net income to net cash provided by operating activities:	'	'	'
Net gain on sale of investments	-749	-343	-778
Decrease in accrued interest receivable	544	73	199
Other, net	-812	-2,111	-1,755
Net cash provided by operating activities	23,194	5,327	10,188
INVESTING ACTIVITIES	'	'	'
Proceeds from principal repayment, maturities, and sales	-806	-799	-353
Net cash provided by investing activities	34,229	75,398	4,084
FINANCING ACTIVITIES	'	'	'
Repayment of trust-preferred debt	-90,000	-177,338	-89,247
Purchase of treasury stock shares	-14,501	-332	-16,917
Dividends on common stock	-2,295	-2,249	-2,315
Net cash (used for) provided by financing activities	-46,325	-106,869	16,532
Increase (decrease) in cash	11,098	-26,144	30,804
CASH AND CASH EQUIVALENTS AT BEGINNING OF YEAR	15,550	41,694	10,890
CASH AND CASH EQUIVALENTS AT END OF YEAR	26,648	15,550	41,694
Parent Company [Member]	'	'	'
OPERATING ACTIVITIES	'	'	'
Net income	8,823	215	5,258
Adjustments to reconcile net income to net cash provided by operating activities:	'	'	'
Equity in undistributed net earnings of subsidiary	5,583	23,246	4,854
Net gain on sale of investments	-30	'	-99
(Decrease) increase in accrued income taxes	-12	1,254	56
Decrease in accrued interest receivable	8	8	117
Deferred federal income taxes	-29	576	-91
Other, net	798	-1,362	186
Net cash provided by operating activities	15,141	23,937	10,281
INVESTING ACTIVITIES	'	'	'
Business acquisitions	'	-12,306	'
Proceeds from principal repayment, maturities, and sales	1,200	'	9,788
Net cash provided by investing activities	1,200	-12,306	9,788
FINANCING ACTIVITIES	'	'	'
Repayment of trust-preferred debt	'	-8,596	'
Purchase of treasury stock shares	-14,501	-332	-16,917
Dividends on common stock	-2,295	-2,249	-2,315
Net cash (used for) provided by financing activities	-16,796	-11,177	-19,232
Increase (decrease) in cash	-455	454	837
CASH AND CASH EQUIVALENTS AT BEGINNING OF YEAR	3,650	3,196	2,359
CASH AND CASH EQUIVALENTS AT END OF YEAR	$3,195	$3,650	$3,196

Selected_Quarterly_Data_Unaudi2

Selected Quarterly Data (Unaudited) - Summary of Selected Quarterly Data (Detail) (USD $)	3 Months Ended								12 Months Ended
In Thousands, except Share data, unless otherwise specified	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2012	Sep. 30, 2012	Jun. 30, 2012	Mar. 31, 2012	Dec. 31, 2011	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2011
Quarterly Financial Information Disclosure [Abstract]	'	'	'	'	'	'	'	'	'	'	'
Total interest income	$11,971	$12,491	$12,690	$13,950	$12,761	$10,576	$10,834	$11,029	$51,102	$45,200	$47,176
Total interest expense	2,578	2,642	2,806	3,231	3,908	3,840	4,063	4,321	11,257	16,132	18,280
Net interest income	9,393	9,849	9,884	10,719	8,853	6,736	6,771	6,708	39,845	29,068	28,896
Provision for loan losses	800	1,100	850	1,000	800	600	650	500	3,750	2,550	2,055
Net interest income after provision for loan losses	8,593	8,749	9,034	9,719	8,053	6,136	6,121	6,208	36,095	26,518	26,841
Total noninterest income	1,740	1,800	2,458	2,026	2,093	1,495	1,623	1,524	8,024	6,735	6,325
Total noninterest expense	8,013	8,154	8,790	7,505	12,943	6,526	6,874	6,662	32,462	33,005	26,045
Income (loss) before income taxes	2,320	2,395	2,702	4,240	-2,797	1,105	870	1,070	11,657	248	7,121
Income taxes (benefit)	292	519	662	1,361	-673	311	211	184	2,834	33	1,863
Net income	$2,028	$1,876	$2,040	$2,879	($2,124)	$794	$659	$886	$8,823	$215	$5,258
Net income	'	'	'	'	'	'	'	'	'	'	'
Basic	$0.19	$0.16	$0.17	$0.24	($0.18)	$0.07	$0.06	$0.08	$0.76	$0.02	$0.46
Diluted	$0.19	$0.16	$0.17	$0.24	($0.18)	$0.07	$0.06	$0.08	$0.76	$0.02	$0.46
Average shares outstanding	'	'	'	'	'	'	'	'	'	'	'
Basic	10,954,982	11,409,791	11,763,581	12,088,125	11,632,918	10,857,483	10,840,604	10,807,598	11,559,553	11,050,683	11,487,915
Diluted	10,954,982	11,409,791	11,763,581	12,088,125	11,632,918	10,857,483	10,840,604	10,807,598	'	'	'

Subsequent_Event_Additional_In

Subsequent Event - Additional Information (Detail) (Subsequent Event [Member], USD $)	1 Months Ended	12 Months Ended
In Millions, except Per Share data, unless otherwise specified	Aug. 16, 2013	Sep. 30, 2013	Sep. 30, 2012	Nov. 18, 2013
Subsequent Event [Member]	'	'	'	'
Subsequent Event [Line Items]	'	'	'	'
Estimated cost of the property, plant, and equipment	$2.50	'	'	'
Weighted-average premium	5.40%	'	'	'
Transaction's closing date	'	'2014-01	'	'
Merger agreement, stockholders of FSB per share	'	'	'	$9.75
Merger agreement, stockholders of FSB amount	'	'	'	$15.70
Expected date of transaction to close	'	'	'Second quarter of 2014	'