Hampden Bancorp 10-K 12 Sep 14 2014 FY Annual report Financial data

Document_and_Entity_Informatio

Document and Entity Information (USD $)	12 Months Ended
	Jun. 30, 2014	Sep. 10, 2014	Dec. 31, 2013
Document And Entity Information [Abstract]	'	'	'
Document Type	'10-K	'	'
Amendment Flag	'false	'	'
Document Period End Date	30-Jun-14	'	'
Document Fiscal Year Focus	'2014	'	'
Document Fiscal Period Focus	'FY	'	'
Trading Symbol	'HBNK	'	'
Entity Registrant Name	'HAMPDEN BANCORP, INC.	'	'
Entity Central Index Key	'0001375320	'	'
Current Fiscal Year End Date	'--06-30	'	'
Entity Filer Category	'Accelerated Filer	'	'
Entity Common Stock, Shares Outstanding (in shares)	'	5,532,018	'
Entity Well-known Seasoned Issuer	'No	'	'
Entity Current Reporting Status	'Yes	'	'
Entity Voluntary Filers	'No	'	'
Entity Public Float	'	'	$76,998,665

Consolidated_Balance_Sheets

Consolidated Balance Sheets (USD $)	Jun. 30, 2014	Jun. 30, 2013
In Thousands, unless otherwise specified
ASSETS	'	'
Cash and due from banks	$9,437	$13,737
Federal funds sold and other short-term investments	3,230	11,881
Cash and cash equivalents	12,667	25,618
Securities available for sale, at fair value	133,936	138,730
Securities held to maturity, at cost	9,302	0
Federal Home Loan Bank of Boston stock, at cost	6,648	5,092
Loans held for sale	330	1,274
Loans, net of allowance for loan losses of $5,651 at June 30, 2014 and $5,414 at June 30, 2013	507,635	450,347
Other real estate owned	309	1,221
Premises and equipment, net	4,668	5,010
Accrued interest receivable	1,688	1,636
Deferred tax asset, net	4,182	4,584
Bank-owned life insurance	17,459	16,956
Other assets	2,673	2,494
Total assets	701,497	652,962
LIABILITIES AND STOCKHOLDERS' EQUITY	'	'
Interest-bearing deposits	407,508	400,717
Non-interest bearing deposits	84,224	74,081
Total deposits	491,732	474,798
Short-term borrowings	4,000	4,500
Long-term debt	112,446	82,492
Mortgagors' escrow accounts	1,184	1,100
Accrued expenses and other liabilities	4,976	6,413
Total liabilities	614,338	569,303
Commitments and contingencies (Note 11)	'	'
Preferred stock ($.01 par value, 5,000,000 shares authorized, none issued or outstanding)	'	'
Common stock ($.01 par value, 25,000,000 shares authorized; 8,034,027 issued at June 30, 2014 and 7,982,976 issued at June 30, 2013; 5,651,130 outstanding at June 30, 2014 and 5,629,099 outstanding at June 30, 2013)	80	80
Additional paid-in-capital	80,389	79,926
Unearned compensation - ESOP (317,998 shares unallocated at June 30, 2014 and 360,397 shares unallocated at June 30, 2013)	-3,180	-3,604
Unearned compensation - equity incentive plan	-8	-16
Retained earnings	37,697	34,450
Accumulated other comprehensive income	158	346
Treasury stock, at cost (2,382,897 shares at June 30, 2014 and 2,353,877 shares at June 30, 2013)	-27,977	-27,523
Total stockholders' equity	87,159	83,659
Total liabilities and stockholders' equity	$701,497	$652,962

Consolidated_Balance_Sheets_Pa

Consolidated Balance Sheets (Parenthetical) (USD $)	Jun. 30, 2014	Jun. 30, 2013
In Thousands, except Share data, unless otherwise specified
Statement of Financial Position [Abstract]	'	'
Loans, allowance for loan losses	$5,651	$5,414
Preferred stock, par value (USD per share)	$0.01	$0.01
Preferred stock, shares authorized (shares)	5,000,000	5,000,000
Preferred stock, issued (shares)	0	0
Preferred stock, outstanding (shares)	0	0
Common stock, par value (USD per share)	$0.01	$0.01
Common stock, shares authorized (shares)	25,000,000	25,000,000
Common stock, issued (shares)	8,034,027	7,982,976
Common stock, outstanding (shares)	5,651,130	5,629,099
Unearned compensation - ESOP, shares unallocated (shares)	317,998	360,397
Treasury stock, shares (shares)	2,382,897	2,353,877

Consolidated_Statements_of_Net

Consolidated Statements of Net Income (USD $)	12 Months Ended
In Thousands, except Share data, unless otherwise specified	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2012
Interest and dividend income:	'	'	'
Loans, including fees	$22,729	$21,570	$21,805
Debt securities:	'	'	'
Taxable	2,615	2,713	2,981
Tax-exempt	68	1	0
Dividends	62	25	22
Federal funds sold and other short-term investments	38	39	25
Total interest and dividend income	25,512	24,348	24,833
Interest expense:	'	'	'
Deposits	3,009	3,664	4,197
Borrowings	2,161	1,821	1,567
Total interest expense	5,170	5,485	5,764
Net interest income	20,342	18,863	19,069
Provision for loan losses	550	675	425
Net interest income, after provision for loan losses	19,792	18,188	18,644
Non-interest income:	'	'	'
Customer service fees	2,168	1,989	1,712
Gain on sales of securities, net	0	114	19
Gain on sales of loans, net	276	910	625
Increase in cash surrender value of bank-owned life insurance	503	529	470
Other	691	660	414
Total non-interest income	3,638	4,202	3,240
Non-interest expense:	'	'	'
Salaries and employee benefits	9,132	9,959	9,870
Occupancy and equipment	1,857	1,921	1,837
Data processing services	931	1,022	593
Advertising	592	570	663
Net (gain) loss on other real estate owned	-1	-38	41
FDIC insurance and assessment	399	370	310
Other general and administrative	3,461	3,835	3,771
Total non-interest expense	16,371	17,639	17,085
Income before income taxes	7,059	4,751	4,799
Income tax provision	2,544	1,777	1,783
Net income	$4,515	$2,974	$3,016
Earnings per share:	'	'	'
Basic (dollars per share)	$0.85	$0.55	$0.52
Diluted (dollars per share)	$0.83	$0.54	$0.51
Weighted average shares outstanding	'	'	'
Basic (in shares)	5,304,151	5,414,851	5,806,977
Diluted (in shares)	5,435,761	5,548,151	5,888,591

Consolidated_Statements_of_Com

Consolidated Statements of Comprehensive Income (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Jun. 30, 2014		Jun. 30, 2013		Jun. 30, 2012
Statement of Comprehensive Income [Abstract]	'		'		'
Net income	$4,515		$2,974		$3,016
Other comprehensive income (loss):	'		'		'
Unrealized holding gains (losses) on available-for-sale securities	-308		-2,658		584
Reclassification adjustment for gains realized in income(1)	0	[1]	-114	[1]	-19	[1]
Net unrealized gains (losses)	-308		-2,772		565
Tax effect	120		1,001		-205
Other comprehensive income (loss), net-of-tax	-188		-1,771		360
Comprehensive income	4,327		1,203		3,376
Income tax related to reclassification adjustment for gains realized in income	'		$42		$6
[1]	Amounts are included in gain on sales of securities, net in the consolidated statements of net income. The related income tax-provision amounted to $42,000 and $6,000 for the years ended June 30, 2013 and 2012, respectively.

Consolidated_Statements_of_Cha

Consolidated Statements of Changes in Stockholders' Equity (USD $)	Total	Common Stock	Additional Paid-in Capital	Unearned Compensation- ESOP	Unearned Compensation- Equity Incentive Plan	Retained Earnings	Accumulated Other Comprehensive Income	Treasury Stock
In Thousands, except Share data
Balance at Jun. 30, 2011	$93,516	$80	$78,517	($4,452)	($871)	$30,327	$1,757	($11,842)
Balance (in shares) at Jun. 30, 2011	'	6,799,499	'	'	'	'	'	'
Comprehensive income	3,376	'	'	'	'	3,016	360	'
Issuance of common stock for exercise of stock options (in shares)	'	1,169	'	'	'	'	'	'
Issuance of common stock for exercise of stock options	0	0	'	'	'	'	'	'
Cash dividends paid	-820	'	'	'	'	-820	'	'
Common stock repurchased (in shares)	'	-832,273	'	'	'	'	'	'
Common stock repurchased	-10,410	'	'	'	'	'	'	-10,410
Stock-based compensation	926	'	330	'	596	'	'	'
Tax benefit from Equity Incentive Plan vesting	42	'	42	'	'	'	'	'
Forfeiture of restricted stock	0	'	'	'	50	-50	'	'
ESOP shares allocated or committed to be allocated	530	'	106	424	'	'	'	'
Balance at Jun. 30, 2012	87,160	80	78,995	-4,028	-225	32,473	2,117	-22,252
Balance (in shares) at Jun. 30, 2012	'	5,968,395	'	'	'	'	'	'
Comprehensive income	1,203	'	'	'	'	2,974	-1,771	'
Issuance of common stock for exercise of stock options (in shares)	'	31,428	'	'	'	'	'	'
Issuance of common stock for exercise of stock options	343	'	343	'	'	'	'	'
Cash dividends paid	-997	'	'	'	'	-997	'	'
Common stock repurchased (in shares)	'	-370,724	'	'	'	'	'	'
Common stock repurchased	-5,271	'	'	'	'	'	'	-5,271
Stock-based compensation	503	'	294	'	209	'	'	'
Tax benefit from Equity Incentive Plan vesting	105	'	105	'	'	'	'	'
ESOP shares allocated or committed to be allocated	613	'	189	424	'	'	'	'
Balance at Jun. 30, 2013	83,659	80	79,926	-3,604	-16	34,450	346	-27,523
Balance (in shares) at Jun. 30, 2013	'	5,629,099	'	'	'	'	'	'
Comprehensive income	4,327	'	'	'	'	4,515	-188	'
Issuance of common stock for exercise of stock options (in shares)	'	51,051	'	'	'	'	'	'
Issuance of common stock for exercise of stock options	163	'	163	'	'	'	'	'
Cash dividends paid	-1,268	'	'	'	'	-1,268	'	'
Common stock repurchased (in shares)	'	-29,020	'	'	'	'	'	'
Common stock repurchased	-454	'	'	'	'	'	'	-454
Stock-based compensation	46	'	38	'	8	'	'	'
Tax benefit from Equity Incentive Plan vesting	1	'	1	'	'	'	'	'
ESOP shares allocated or committed to be allocated	685	'	261	424	'	'	'	'
Balance at Jun. 30, 2014	$87,159	$80	$80,389	($3,180)	($8)	$37,697	$158	($27,977)
Balance (in shares) at Jun. 30, 2014	'	5,651,130	'	'	'	'	'	'

Consolidated_Statements_of_Cha1

Consolidated Statements of Changes in Stockholders' Equity (Parenthetical) (USD $)	12 Months Ended
	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2012
Statement of Stockholders' Equity [Abstract]	'	'	'
Cash dividends paid, per share (USD per share)	$0.24	$0.18	$0.14
ESOP shares allocated or committed to be allocated (shares)	42,399	42,399	42,399

Consolidated_Statement_of_Cash

Consolidated Statement of Cash Flows (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2012
Cash flows from operating activities:	'	'	'
Net income	$4,515	$2,974	$3,016
Adjustments to reconcile net income to net cash provided by operating activities:	'	'	'
Provision for loan losses	550	675	425
Changes in fair value of mortgage servicing rights	41	161	-159
Net amortization of securities premiums	372	783	199
Depreciation and amortization	671	734	764
Gain on sales of securities, net	0	-114	-19
Loans originated for sale	-16,615	-31,285	-23,073
Proceeds from loan sales	17,835	31,848	23,171
Gain on sales of loans, net	-276	-910	-625
Net (gain) loss on other real estate owned	-1	-38	41
Increase in cash surrender value of bank-owned life insurance	-503	-529	-470
Deferred tax provision (benefit)	522	-179	1,296
Employee Stock Ownership Plan expense	685	613	530
Stock-based compensation	46	503	926
Tax benefit from Equity Incentive Plan vesting	-1	-105	-42
Net change in:	'	'	'
Accrued interest receivable	-52	39	-134
Other assets	-219	1,031	-461
Accrued expenses and other liabilities	-1,437	539	-893
Net cash provided by operating activities	6,133	6,740	4,492
Cash flows from investing activities: Activity in available-for-sale securities:	'	'	'
Sales	0	3,189	1,308
Maturities and calls	6,626	178	1,000
Principal payments	29,547	45,899	29,766
Purchases	-41,361	-47,588	-63,620
Purchase of loans	-5,321	-6,576	-8,390
Loan originations, net of principal payments	-53,073	-38,559	-1,578
Proceeds from sales of other real estate owned	1,469	1,100	304
Purchase of bank-owned life insurance	0	-222	-5,000
(Purchase) redemption of Federal Home Loan Bank stock	-1,556	-133	274
Purchase of premises and equipment	-329	-585	-514
Net cash used by investing activities	-63,998	-43,297	-46,450
Cash flows from financing activities:	'	'	'
Net change in deposits	16,934	39,966	17,577
Net change in securities sold under agreements to repurchase	0	-7,315	82
Net change in short-term borrowings	-500	1,500	3,000
Proceeds from issuance of long-term debt	72,203	28,135	35,411
Repayment of long-term debt	-42,249	-22,304	-6,228
Net change in mortgagors' escrow accounts	84	90	80
Tax benefit from Equity Incentive Plan vesting	1	105	42
Issuance of common stock for exercise of stock options	163	343	0
Repurchase of common stock	-454	-5,271	-10,410
Payment of dividends on common stock	-1,268	-997	-820
Net cash provided by financing activities	44,914	34,252	38,734
Net increase (decrease) in cash and cash equivalents	-12,951	-2,305	-3,224
Cash and cash equivalents at beginning of year	25,618	27,923	31,147
Cash and cash equivalents at end of year	12,667	25,618	27,923
Supplemental cash flow information:	'	'	'
Interest paid on deposits	3,009	3,664	4,197
Interest paid on borrowings	2,156	1,832	1,597
Income taxes paid	2,333	960	284
Securities reclassified from available-for-sale to held-to-maturity	9,302	0	0
Transfers from loans to other real estate owned	$556	$413	$907

Summary_of_Significant_Account

Summary of Significant Accounting Policies	12 Months Ended
	Jun. 30, 2014
Accounting Policies [Abstract]	'
Summary of Significant Accounting Policies	'
	SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES
	Basis of Presentation and Consolidation
	The accompanying consolidated financial statements include the accounts of Hampden Bancorp, Inc. (the “Company”), a Delaware corporation, and its wholly-owned subsidiaries, Hampden Bank (the “Bank”) and Hampden LS, Inc.  Hampden Bank is a Massachusetts-chartered stock savings bank. The Company contributed funds to Hampden LS, Inc. to enable it to make a 15-year loan to the Employee Stock Ownership Plan (“ESOP”) to allow it to purchase shares of the Company’s common stock. The Bank has three wholly-owned subsidiaries: Hampden Investment Corporation and Hampden Investment Corporation II, which engage in buying, selling, holding and otherwise dealing in securities, and Hampden Insurance Agency, which is inactive.  All significant intercompany accounts and transactions have been eliminated in consolidation.
	Use of Estimates
	In preparing consolidated financial statements in conformity with accounting principles generally accepted in the United States of America, management is required to make estimates and assumptions that affect the reported amounts of assets and liabilities as of the date of the consolidated balance sheet and reported amounts of revenues and expenses during the reporting period. Actual results could differ from those estimates. The determination of the allowance for loan losses and the valuation of deferred tax assets are material estimates that are particularly susceptible to significant change in the near term.
	Business and Operating Segments
	The Company provides a variety of financial services to individuals and small businesses through its Internet operations and ten offices in Hampden County, Massachusetts, and surrounding communities. Its primary deposit products are checking, savings and term certificate accounts and its primary lending products are residential mortgage and commercial loans.
	Financial information is reported on the basis that it is used internally for evaluating segment performance and deciding how to allocate resources to segments. Management evaluates the Company's performance and allocates resources based on a single segment concept. Accordingly, there are no separately identified material operating segments for which discrete financial information is available. The Company does not derive revenues from, or have assets located in foreign countries, nor does it derive revenues from any single customer that represents 10% or more of the Company's total revenues.
	Reclassification
	Amounts in prior years consolidated financial statements are reclassified where necessary to conform to the current year presentation.
	Cash and Cash Equivalents and Statements of Cash Flows
	Cash and due from banks, federal funds sold and short-term investments with original maturities of less than 90 days are recognized as cash equivalents in the consolidated statements of cash flows. Federal funds sold generally mature in one day. Cash flows from loans and deposits are reported on a net basis, except for loan purchases. The Company maintains amounts due from banks that, at times, may exceed federally insured limits. The Company has not experienced any losses from such concentrations.
	Securities
	Debt securities that management has the positive intent and ability to hold to maturity are classified as "held to maturity" and recorded at amortized cost. Securities not classified as held to maturity, including equity securities with readily determinable fair values, are classified as "available for sale" and recorded at fair value, with unrealized gains and losses excluded from earnings and reported in other comprehensive income.
	Purchase premiums and discounts are recognized in interest income using the interest method over the terms of the securities. Realized gains and losses on disposition of securities are recorded on the trade date and determined using the specific identification method.
	Fair Value Hierarchy
	The Company groups its assets generally measured 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 the fair value, as follows:
	Level 1:	Inputs to the valuation methodology are quoted prices, unadjusted, for identical assets in active markets. A quoted price in an active market provides the most reliable evidence of fair value and is used to measure fair value whenever available.
	Level 2:	Inputs to the valuation methodology include quoted prices for similar assets in active markets; inputs to the valuation methodology include quoted prices for identical or similar assets in markets that are not active; or inputs to the valuation methodology that are derived principally from or can be corroborated by observable market data by correlation or other means.
	Level 3:	Inputs to the valuation methodology are unobservable and significant to the fair value measurement. Level 3 assets include financial instruments whose value is determined using discounted cash flow methodologies, as well as instruments for which the determination of fair value requires significant management judgment or estimation.
	Transfers between levels are recognized at the end of a reporting period if applicable.
	Federal Home Loan Bank Stock
	The Bank, as a member of the Federal Home Loan Bank of Boston ("FHLB"), is required to invest in shares of $100 par value stock of the FHLB in the amount of 1% of the Bank’s outstanding residential loans or 5% of its outstanding advances from the FHLB, whichever is higher. Based on redemption provisions of the FHLB, the stock has no quoted market value and is carried at cost. At its discretion, the FHLB may declare dividends on its stock. The Company reviews its investment in FHLB stock for impairment based on the ultimate recoverability of the cost basis in the FHLB stock. As of June 30, 2014, no impairment has been recognized.
	Loans Held for Sale
	Loans originated and intended for sale in the secondary market are carried at the lower of amortized cost or fair value in the aggregate, as determined by outstanding commitments from investors or current investor yield requirements. Net unrealized losses, if any, are recognized through a valuation allowance by charges to non-interest income. Gains or losses on sales of mortgage loans are recognized based on the difference between the selling price and the carrying value of the related mortgage loans sold. As of June 30, 2014 and 2013, the Company had no material derivative loan commitments.
	Loans
	The Company grants mortgage, commercial, and consumer loans to customers. A substantial portion of the loan portfolio consists of mortgage loans in Hampden and Hampshire Counties, Massachusetts, and surrounding communities. The ability of the Company's debtors to honor their contracts is dependent upon the local real estate market and economy.
	Loans that management has the intent and ability to hold for the foreseeable future or until maturity or pay-off generally are reported at their outstanding unpaid principal balances adjusted for charge-offs, the allowance for loan losses, and any deferred fees or costs on originated and purchased loans. 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 related loan yield using the interest method.
	The accrual of interest on mortgage and commercial loans is discontinued when reasonable doubt exists as to the full collection of interest and principal or at the time the loan is 90 days past due unless the credit is well-secured and in process of collection. Other personal loans are typically charged off no later than 180 days past due. Past due status is based on the contractual term of the loans. In all cases, loans are placed on non-accrual or charged-off at an earlier date if collection of principal or interest is considered doubtful. All interest accrued but not collected for loans that are placed on non-accrual or charged off is reversed against interest income. The interest on these loans is accounted for on the cash-basis or cost-recovery method, until qualifying for return to accrual status. Loans are reclassified to accrual status once the borrower has shown the ability and an acceptable history of repayment of six months. The Company may also return a loan to accrual status if the borrower evidences sufficient cash flow to service the debt and provides additional collateral to support the collectability of the loan.
	Allowance for Loan Losses
	The allowance for loan losses is established as losses are estimated to have occurred through a provision for loan losses charged to earnings. Loan losses are charged against the allowance when management believes the uncollectibility of a loan balance is confirmed. Subsequent recoveries, if any, are credited to the allowance.
	The allowance for loan losses is evaluated on a quarterly basis by management and is based upon management's periodic review of the collectability of the loans in light of historical experience, the nature and volume of the loan portfolio, adverse situations that may affect the borrower's ability to repay, estimated value of any underlying collateral and prevailing economic conditions. This evaluation is inherently subjective as it requires estimates that are susceptible to significant revision as more information becomes available.
	The analysis of the allowance for loan losses has two components: specific and general allocations, which are further described below.
	Specific allocation
	Specific loss allocations are made for loans determined to be impaired. Specific allocations result in a charge-off if the likelihood of loss is evaluated as probable. The Company’s policy for charging off uncollectible loans is based on an analysis of the financial condition of the borrower and/or the collateral value. To determine the adequacy of collateral on a particular loan, an estimate of the fair value of the collateral is based on the most current appraised value, tax assessed value, discounted cash flow valuation or other available information.
	A loan is considered impaired when, based on current information and events, it is probable that a creditor will be unable to collect the scheduled payments of principal and interest when due according to the contractual terms of the loan agreement. Impaired loans are generally placed on non-accrual status either when there is reasonable doubt as to the full collection of payments or when the loans become 90 days past due unless an evaluation clearly indicates that the loan is well secured and in the process of collection. Impairment is measured on a loan by loan basis by either the present value of expected future cash flows discounted at the loan’s effective interest rate, or the fair value of the collateral, adjusted for selling expenses, if the loan is collateral dependent.
	The Company may periodically agree to modify the contractual terms of loans. When a loan is modified and a concession is made to a borrower experiencing financial difficulty, the modification is considered a troubled debt restructuring (“TDR”). All TDRs are initially classified as impaired.
	Large groups of smaller balance homogeneous loans are collectively evaluated for impairment unless such loans are subject to a troubled debt restructuring agreement.
	General allocation
	The general allocation is determined by segregating the remaining loans, by loan segment and payment history. Consideration is given to historical loss experience, and qualitative factors such as delinquency trends, changes in underwriting standards or lending policies, procedures and practices, experience and depth of management and lending staff, and general economic conditions. This analysis establishes loss factors that are applied to the loan groups to determine the amount of the general allocations. This evaluation is inherently subjective as it requires material estimates that may be susceptible to significant revisions based upon changes in economic and real estate market conditions. Actual loan losses may be significantly more than the allowance for loan losses that have been established which could have a material negative effect on financial results. There were no changes in the Company’s policies or methodology pertaining to the general component of the allowance for loan losses during the year ended June 30, 2014.
	On a quarterly basis, management’s Loan Review Committee reviews the current status of various loan assets in order to evaluate the adequacy of the allowance for loan losses. In this evaluation process, specific loans are analyzed to determine their potential risk of loss. This process concentrates on non-accrual and classified loans with risk ratings of six or higher. Any loan determined to be impaired is evaluated for potential loss exposure as previously described.
	The qualitative factors are assessed based on the various risk characteristics of each loan segment. Risk characteristics relevant to each portfolio segment are as follows:
	Residential real estate – The Company generally does not originate loans with a loan-to-value ratio greater than 80 percent unless there is private mortgage insurance. All loans in this segment are collateralized by one- to four-family residential real estate and repayment is dependent on the credit quality of the individual borrower. The overall health of the economy, including unemployment rates and housing prices, will have an effect on the credit quality in this segment.
	Commercial real estate – Loans in this segment are primarily income-producing properties throughout Massachusetts and Connecticut. The underlying cash flows generated by the properties can be adversely impacted by a downturn in the economy as evidenced by increased vacancy rates, which in turn, will have an effect on the credit quality in this segment. Management requires annual borrower financial statements, obtains rent rolls annually and continually monitors the cash flows of these loans.
	Home equity loans - Home equity loans are broken out into two segments, secured by first or second mortgages on one- to four-family owner occupied properties, and are generally underwritten in amounts such that the combined first and second mortgage balances generally do not exceed 85% of the value of the property serving as collateral at time of origination. The lines of credit are available to be drawn upon for 10 to 20 years, at the end of which time they become term loans amortized over 5 to 10 years. Interest rates on home equity lines normally adjust based on the month-end prime rate published in the Wall Street Journal.
	Residential construction loans – Loans in this segment primarily include non-speculative real estate loans. All loans in this segment are collateralized by one- to four-family residential real estate and repayment is dependent on the credit quality of the individual borrower. The overall health of the economy, including unemployment rates and housing prices, will have an effect on the credit quality in this segment.
	Commercial construction loans – Loans in this segment primarily include construction to permanent non-speculative real estate loans. The underlying cash flows generated by the properties are adversely impacted by a downturn in the economy, which in turn, will have an effect on the credit quality in this segment.
	Commercial loans – Loans in this segment are made to businesses and are generally secured by assets of the business. Repayment is expected from the cash flows of the business. A weakened economy, and resultant decreased consumer spending, will have an effect on the credit quality in this segment.
	Manufactured home loans – Loans in this segment are secured by first liens on properties located primarily in the Northeast. Repayment is dependent on the credit quality of the individual borrower. The overall health of the economy, including unemployment rates, will have an effect on the credit quality in this segment.
	Automobile and other secured loans – Loans in this segment include consumer non-real estate secured loans that the Company originates as well as automobile loans that the Company purchases from third parties. The Company has the ability to select the automobile loans it purchases based on its own underwriting standards.
	Other consumer loans – Loans in this segment are generally unsecured and repayment is dependent on the credit quality of the individual borrower.
	Troubled Debt Restructurings
	A modified loan is considered a TDR when two conditions are met: (1) the borrower is experiencing financial difficulty and (2) concessions are made by the Company that would not otherwise be considered for a borrower with similar risk characteristics. The most common types of modifications include below market interest rate reductions, deferrals of principal and maturity extensions. Modified terms are dependent upon the financial position and needs of the individual borrower. If the modification agreement is violated, the loan is handled by the Company's Collections Department for resolution, which may result in foreclosure. The Company's determination of whether a loan modification is a TDR considers the individual facts and circumstances surrounding each modification.
	The Company's nonaccrual policy is followed for TDRs. If the loan was current prior to modification, nonaccrual status may not be required. If the loan was on nonaccrual prior to modification or if the payment amount significantly increases, the loan will remain on nonaccrual for a period of at least six months. Loans qualify for return to accrual status once the borrower has demonstrated the willingness and the ability to perform in accordance with the restructured terms of the loan agreement for a period of not less than six months and future payments are reasonably assured.
	TDR classifications may be removed if the borrower demonstrates compliance with the modified terms and the restructuring agreement specifies an interest rate equal to that which would be provided to a borrower with similar risk characteristics at the time of restructuring. All TDRs are initially reported as impaired.
	Loan Servicing
	Servicing assets are recognized as separate assets at fair value when rights are acquired through purchase or through sale of financial assets. Fair value is based on market prices for comparable mortgage servicing contracts, when available, or alternatively, is based on a valuation technique using the present value of estimated future cash flows calculated using current market discount rates. Servicing assets are measured at fair value at each reporting period and changes in fair value are recognized in other non-interest income in the period in which the change occurs.
	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.
	During the normal course of business, the Company may transfer a portion of a financial asset, for example, a participation loan or the government guaranteed portion of a loan. In order to be eligible for sales treatment, the transfer of the portion of the loan must meet the criteria of a participating interest. If it does not meet the criteria of a participating interest, the transfer must be accounted for as a secured borrowing. In order to meet the criteria for a participating interest, all cash flows from the loan must be divided proportionately, the rights of each loan holder must have the same priority, the loan holders must have no recourse to the transferor other than standard representations and warranties and no loan holder can have the right to pledge or exchange the entire loan.
	Bank-Owned Life Insurance
	Bank-owned life insurance policies are reflected on the consolidated balance sheet at cash surrender value. Changes in cash surrender value are reflected in non-interest income on the consolidated statement of net income and are not subject to income taxes.
	Premises and Equipment
Land is carried at cost. Buildings, leasehold improvements and equipment are stated at cost, less accumulated depreciation and amortization, computed on the straight-line method over the estimated useful lives of the assets or the expected term of the lease, if shorter. Expected terms include lease option periods to the extent that the exercise of such options is reasonably assured. The cost of maintenance and repairs is expensed as incurred.
Other Real Estate Owned
The Company classifies property acquired through foreclosure or acceptance of a deed in lieu of foreclosure as other real estate owned (“OREO”) in its consolidated financial statements. When property is placed into OREO, it is recorded at the fair value less estimated costs to sell at the date of foreclosure or acceptance of deed in lieu of foreclosure. At the time of transfer to OREO, any excess of carrying value over fair value less estimated cost to sell is charged to the allowance for loan losses. Management, or its designee, inspects all OREO property periodically. Holding costs and declines in fair value subsequent to transfer result in charges to non-interest expense.
Advertising Costs
All advertising costs are expensed as incurred.
Income Taxes
The Company uses the asset and liability method of accounting for income taxes. Under this method, deferred tax assets and liabilities are recognized for the future tax consequences attributable to differences between the financial statement carrying amounts of existing assets and liabilities and their respective tax bases. Deferred tax assets and liabilities are measured using enacted tax rates expected to apply to taxable income in the years in which those temporary differences are expected to be recovered or settled. As changes in the tax laws or rates are enacted, deferred tax assets and liabilities are adjusted accordingly through the provision for income taxes. The Company's base amount of its federal income tax reserve for loan losses is a permanent difference for which there is no recognition of a deferred tax liability. However, the loan loss allowance maintained for financial reporting purposes is a temporary difference with allowable recognition of a related deferred tax asset, if it is deemed realizable. The Company exercises significant judgment in evaluating the amount and timing of recognition of the resulting tax assets and liabilities. These judgments require projections of future taxable income. These judgments and estimates, which are inherently subjective, are reviewed periodically as regulatory and business factors change. Deferred tax assets are reduced by a valuation allowance when, in the opinion of management, it is more likely than not that all or some portion of the deferred tax assets will not be realized.
The Company has no material uncertain tax positions as of June 30, 2014 or 2013.
The Company records interest and penalties as part of income tax expense. No interest and penalties were recorded for the years ended June 30, 2014, 2013 and 2012.
Income tax benefits related to stock compensation in excess of grant date fair value less any proceeds on exercise are recognized as an increase to additional paid-in capital upon vesting or exercising and delivery of the stock. Any income tax effects related to stock compensation that are less than grant date fair value less any proceeds on exercise would be recognized as a reduction of additional paid-in capital to the extent of previously recognized income tax benefits and then through income tax expense for the remaining amount.
Treasury Stock
Common stock shares repurchased are recorded as treasury stock at cost.
Equity Incentive Plan
The Company measures compensation cost relating to share-based payment transactions based on the grant date fair value of the equity instruments issued. Compensation cost is recognized over the vesting period of such awards on a straight-line basis. Unrecognized compensation cost applicable to restricted stock awards is recorded as unearned compensation and a reduction of stockholders’ equity. The fair value of stock option awards are estimated on the date of grant using the Black-Scholes option pricing model, which includes several assumptions such as expected volatility, dividends, term and risk-free rate for each stock option award. See Note 14 for additional information. Reductions in compensation expense associated with forfeited awards are estimated at the grant date, and this estimated forfeiture rate is adjusted based on actual forfeiture experience.
Employee Stock Ownership Plan
Compensation expense is recognized based on the fair value of shares at the time they are committed to be released to the Employee Stock Ownership Plan (“ESOP”) participants. All shares held by the ESOP that are released and committed to be released are deemed outstanding for purposes of earnings per share calculations. The value of unearned shares to be allocated to ESOP participants for future services not yet performed is recorded as unearned compensation and a reduction of stockholders’ equity.
Comprehensive Income/loss
Accounting principles generally require that recognized revenue, expenses, gains and losses be included in net income. Although certain changes in assets and liabilities, such as unrealized gains and losses on available-for-sale securities, are reported as a separate component of the stockholders’ equity section of the consolidated balance sheet, such items, along with net income, are components of comprehensive income.
The components of accumulated other comprehensive income and related tax effects are as follows:
	June 30,
	2014			2013
	(In Thousands)
Net unrealized gains on available-for-sale securities	$	233		$	541
Tax effects	(75		)	(195		)
Net-of-tax amount	$	158		$	346
Earnings Per Common Share
Basic earnings per share ("EPS") excludes dilution and is calculated by dividing net income available to common stockholders by the weighted-average number of shares of common stock outstanding during the period. Diluted EPS is computed in a manner similar to that of basic EPS except that the weighted-average number of common shares outstanding is increased to include the number of incremental common shares (computed using the treasury stock method) that would have been outstanding if all potentially dilutive common stock equivalents (such as unvested restricted stock or shares subject to options) were issued during the period. Unallocated common shares held by the ESOP are shown as a reduction of stockholders' equity, and are included in the weighted-average number of common shares outstanding for both basic and diluted earnings per share calculations when committed to be released. Unvested restricted shares are not considered outstanding in the computation of basic earnings per share since the rights to the dividends are forfeitable.
Earnings per common share have been computed based upon the following:
	Years Ended June 30,
	2014			2013			2011
Net income available to common stock (in thousands)	$	4,515		$	2,974		$	3,016
Average number of shares issued	8,019,352			7,970,174			7,950,748
Less: average unallocated ESOP shares	(340,868		)	(383,264		)	(425,660		)
Less: average treasury stock	(2,371,873		)	(2,142,150		)	(1,631,852		)
Less: average unvested restricted stock awards	(2,460		)	(29,909		)	(86,259		)
Average number of basic shares outstanding	5,304,151			5,414,851			5,806,977
Plus: dilutive unvested restricted stock awards	1,487			20,942			37,545
Plus: dilutive stock option shares	130,123			112,358			44,069
Average number of diluted shares outstanding	5,435,761			5,548,151			5,888,591
Basic earnings per share	$	0.85		$	0.55		$	0.52
Diluted earnings per share	$	0.83		$	0.54		$	0.51
There were 10,000 stock options for the year ended June 30, 2014, which were excluded from the diluted earnings per share because their effect is anti-dilutive. There were no anti-dilutive shares for the years ended June 30, 2013 and 2012.
Recent Accounting Pronouncements
In February 2013, the Financial Accounting Standards Board ("FASB") issued Accounting Standards Update ("ASU") No. 2013-2 Comprehensive Income (Topic 220), Reporting of Amounts Reclassified Out of Accumulated Other Comprehensive Income. The standard requires that companies present either in a single note or parenthetically on the face of the financial statements, the effect of significant amounts reclassified from each component of accumulated other comprehensive income based on its source and the income statement line items affected by the reclassification. The new requirements took effect for public companies in fiscal years, and interim periods within those years, beginning after December 15, 2012. This ASU guidance did not have a material impact on the Company’s consolidated financial statements.
In January 2014, the FASB issued ASU No. 2014-04, Receivables - Troubled Debt Restructurings by Creditors (Subtopic 310-40): Reclassification of Residential Real Estate Collateralized Consumer Mortgage Loans upon Foreclosure. The ASU was issued to clarify that an in substance repossession or foreclosure occurs, and a creditor is considered to have received physical possession of residential real estate property collateralizing a consumer mortgage loan, upon either (1) the creditor obtaining legal title to the residential real estate property upon completion of a foreclosure or (2) the borrower conveying all interest in the residential real estate property to the creditor to satisfy that loan through completion of a deed in lieu of foreclosure or through a similar legal agreement. Additionally, the ASU amendments require interim and annual disclosure of both (1) the amount of foreclosed residential real estate property held by the creditor and (2) the recorded investment in consumer mortgage loans collateralized by residential real estate property that are in the process of foreclosure according to local requirements of the applicable jurisdiction. The ASU is effective for annual periods, and interim periods within those annual periods, beginning after December 15, 2014, and the ASU is to be adopted using either a modified retrospective transition method or a prospective transition method. The Company does not believe such ASU will have a material effect on the Company's consolidated financial statements for the interim and annual periods in 2014, other than the additional disclosures required.

Restrictions_on_Cash_and_Amoun

Restrictions on Cash and Amounts Due From Banks	12 Months Ended
	Jun. 30, 2014
Cash and Cash Equivalents [Abstract]	'
Restrictions on Cash and Amounts Due From Banks	'
	RESTRICTIONS ON CASH AND AMOUNTS DUE FROM BANKS
	The Company is required to maintain average balances on hand or with the Federal Reserve Bank of Boston. At June 30, 2014 and 2013, these reserve balances amounted to $7.3 million and $6.4 million, respectively.

Investment_Securities

Investment Securities	12 Months Ended
	Jun. 30, 2014
Investments, Debt and Equity Securities [Abstract]	'
Investment Securities	'
	INVESTMENT SECURITIES
	The amortized cost and estimated fair value of the Company's investment securities, with gross unrealized gains and losses, follows:
		June 30, 2014
		Amortized		Gross		Gross			Fair Value
		Cost		Unrealized		Unrealized
				Gains		Losses
		(In Thousands)
	Available for Sale
	Debt securities:
	Corporate bonds	$	3,026	$	60	$	—		$	3,086
	Residential mortgage-backed securities:
	Agency	128,938		1,629		(1,494		)	129,073
	Non-agency	1,688		15		(5		)	1,698
	Total debt securities	133,652		1,704		(1,499		)	133,857
	Marketable equity securities	51		28		—			79
	Total securities available for sale	$	133,703	$	1,732	$	(1,499	)	$	133,936
	Held to Maturity
	Municipal bonds	$	9,302	$	—	$	—		$	9,302
	Total securities held to maturity	$	9,302	$	—	$	—		$	9,302
		June 30, 2013
		Amortized		Gross		Gross			Fair Value
		Cost		Unrealized		Unrealized
				Gains		Losses
		(In Thousands)
	Available for Sale
	Debt securities:
	Municipal bonds	$	395	$	—	$	—		$	395
	Corporate bonds	3,036		40		—			3,076
	Residential mortgage-backed securities:
	Agency	132,498		1,916		(1,426		)	132,988
	Non-agency	2,209		10		(16		)	2,203
	Total debt securities	138,138		1,966		(1,442		)	138,662
	Marketable equity securities	51		17		—			68
	Total securities available for sale	$	138,189	$	1,983	$	(1,442	)	$	138,730
	Residential mortgage-backed agency securities are mortgage-backed securities that have been issued by the federal government or its agencies or government-sponsored enterprises. Residential mortgage-backed non-agency securities are mortgage-backed securities that have been issued by private mortgage originators.
	During the year ended June 30, 2014, $9.3 million in municipal securities were transferred at fair value from the available for sale category to the held to maturity category, as management has no intentions of selling any municipal security prior to maturity. There is no readily available market pricing and no active market to sell these securities, however management believes that the amortized cost of these securities approximates fair value based on their relatively short terms to maturity.
	Certain investment securities are pledged to secure FHLB advances. See Note 8.
	INVESTMENT SECURITIES (Continued)
	The amortized cost and estimated fair value of debt securities by contractual maturity at June 30, 2014 are set forth below. Expected maturities will differ from contractual maturities because the issuer may have the right to call or prepay obligations with or without call or prepayment penalties.
		Securities Available for Sale				Securities Held to Maturity
		Amortized		Fair Value		Amortized			Fair Value
		Cost				Cost
		(In Thousands)
	Within 1 year	$	—	$	—	$	6,813		$	6,813
	After 1 year but within 5 years	3,026		3,086		2,489			2,489
	Total bonds, obligations, and municipals	3,026		3,086		9,302			9,302
	Residential mortgage-backed securities:
	Agency	128,938		129,073		—			—
	Non-agency	1,688		1,698		—			—
	Total debt securities	$	133,652	$	133,857	$	9,302		$	9,302
	For the year ended June 30, 2014 there were no sales of securities available for sale. For the years ended June 30, 2013 and 2012, proceeds from sales of securities available for sale amounted to $3.2 million and $1.3 million, respectively. For the same periods, gross realized gains amounted to $114,000 and $19,000, respectively.
	Information pertaining to securities with gross unrealized losses at June 30, 2014 and 2013, aggregated by investment category and length of time that individual securities have been in a continuous loss position, follows:
		Less Than Twelve Months				Over Twelve Months					Total
		Gross		Fair Value		Gross			Fair Value		Gross		Fair Value
		Unrealized				Unrealized					Unrealized
		Losses				Losses					Losses
		(In Thousands)
	June 30, 2014:
	Residential mortgage-backed securities:
	Agency	$	38	$	7,357	$	1,456		$	51,094	$	1,494	$	58,451
	Non-agency	1		143		4			234		5		377
		$	39	$	7,500	$	1,460		$	51,328	$	1,499	$	58,828
	June 30, 2013:
Residential mortgage-backed securities:
Agency	$	1,337	$	68,456	$	89		$	6,142	$	1,426	$	74,598
Non-agency	5		330		11			1,047		16		1,377
	$	1,342	$	68,786	$	100		$	7,189	$	1,442	$	75,975
Management conducts, at least on a quarterly basis, a review of our investment securities to determine if the value of any security has declined below its cost or amortized cost and whether such decline represents other-than-temporary impairment (“OTTI”). There was no impairment charge recognized for the years ended June 30, 2014, 2013 and 2012.
INVESTMENT SECURITIES (Concluded)
At June 30, 2014, 47 debt securities had unrealized losses with aggregate depreciation of 2.5% from the Company's amortized cost basis. In analyzing an issuer's financial condition, management considers whether the securities are issued by the federal government, its agencies or government-sponsored enterprises, whether downgrades by bond rating agencies have occurred, and industry analyst's reports. The unrealized losses in residential mortgage-backed securities were primarily caused by interest rate
changes. As management has not decided to sell these securities, nor is it likely that the Company will be required to sell these securities, no declines are deemed to be other than temporary. At June 30, 2014, nine securities issued by private mortgage originators had unrealized losses. Such securities had an amortized cost of $382,000 and a fair value of $377,000. All of these investments are “Senior” Class tranches and have underlying credit enhancement. These securities were originated in the period 2002-2005 and are performing in accordance with contractual terms. Management estimates the loss projections for each security by evaluating the industry rating, amount of delinquencies, amount of foreclosure, amount of other real estate owned, average credit scores, average amortized loan to value and credit enhancement. Based on this review, management determined that no OTTI existed as of June 30, 2014.

Loan_Servicing

Loan Servicing	12 Months Ended
	Jun. 30, 2014
Transfers and Servicing [Abstract]	'
Loan Servicing	'
	LOAN SERVICING
	In the ordinary course of business, the Company sells real estate loans in the secondary market. The Company retains servicing on loans sold and earns servicing fees of .25% per annum based on the monthly outstanding balances of the loans serviced. The Company recognizes servicing assets each time it undertakes an obligation to service loans sold. Calculation of the fair value of mortgage servicing assets is based on Service Release Premium (“SRP”) rates for conforming fixed rate mortgages obtained from correspondent lenders.  SRP rates vary based on the outstanding balances of the mortgages and are periodically adjusted based on mortgage prepayments and market conditions.
	The changes in servicing assets measured using fair value are as follows:
		Years Ended June 30,
		2014		2013
		(In Thousands)
	Fair value at the beginning of year	$	654	$	445
	Capitalized servicing assets	97		48
	Changes in fair value	41		161
	Fair value at end of year	$	792	$	654
	The unpaid principal balance of mortgages serviced for others was $71.8 million and $67.7 million at June 30, 2014 and June 30, 2013, respectively. There are no recourse provisions for the loans that are serviced for others. The risks inherent in mortgage servicing assets relate primarily to changes in prepayments that result from shifts in mortgage interest rates. For the years ended June 30, 2014, 2013, and 2012, amounts recognized for loan servicing fees amounted to $321,000, $346,000, and $239,000, respectively, which are included in other non-interest income in the consolidated statements of net income.

Loans

Loans	12 Months Ended
	Jun. 30, 2014
Receivables [Abstract]	'
Loans	'
	LOANS
	A summary of the balances of loans follows:
		June 30,
		2014			2013
		(In Thousands)
	Mortgage loans on real estate:
	One- to four-family	$	107,498		$	107,617
	Commercial	200,750			167,381
	Home equity:
	First lien	36,299			36,093
	Second lien	39,845			42,328
	Construction:
	Residential	3,807			3,736
	Commercial	36,189			21,237
	Total mortgage loans on real estate	424,388			378,392
	Other loans:
	Commercial	54,756			43,566
	Consumer:
	Manufactured homes	21,766			21,716
	Automobile and other secured loans	7,172			7,682
	Other	2,566			1,679
	Total other loans	86,260			74,643
	Total loans	510,648			453,035
	Net deferred loan costs	2,638			2,726
	Allowance for loan losses	(5,651		)	(5,414		)
	Total loans, net	$	507,635		$	450,347
	The Company has transferred a portion of its originated commercial real estate and commercial loans to participating lenders. The amounts transferred have been accounted for as sales and are therefore not included in the Company’s accompanying consolidated balance sheets. The Company and participating lenders share in any gains or losses that may result from a borrower’s lack of compliance with contractual terms of the loan. The Company continues to service the loans on behalf of the participating lenders and, as such, collects cash payments from the borrowers, remits payments (net of servicing fees) to participating lenders and disburses required escrow funds to relevant parties. At June 30, 2014 and June 30, 2013, the Company was servicing loans for participants aggregating $34.4 million and $35.0 million, respectively.
	During fiscal years 2014 and 2013, the Company purchased manufactured home loans aggregating $3.0 million and $2.9 million, respectively. During fiscal years 2014 and 2013, the Company purchased automobile loans aggregating $2.3 million and $3.7 million, respectively.
	Certain residential and home equity loans are subject to a blanket lien securing FHLB advances. See Note 8.
	LOANS (Continued)
	Credit Quality Information
	The Company utilizes a nine grade internal loan rating system for all loans as follows:
	Loans rated 1 – 5: Loans in these categories are considered “pass” rated loans with low to average risk.
	Loans rated 6: Loans in this category are considered “special mention.” These loans are starting to show signs of potential weakness and are being closely monitored by management.
	Loans rated 7: Loans in this category are considered “substandard.” Generally, a loan is considered substandard if it is inadequately protected by the current net worth and paying capacity of the obligors and/or the collateral pledged. There is a distinct possibility that the Company will sustain some loss if the weakness is not corrected.
	Loans rated 8: Loans in this category are considered “doubtful.” Loans classified as doubtful have all the weaknesses inherent in those classified substandard with the added characteristic that the weaknesses make collection or liquidation in full, on the basis of currently existing facts, highly questionable and improbable.
	Loans rated 9: Loans in this category are considered uncollectible (“loss”) and of such little value that their continuance as loans is not warranted. These loans are generally charged off at each quarter end.
	On an annual basis, or more often if needed, the Company formally reviews the ratings on all commercial real estate, commercial construction and commercial loans. The Company engages an independent third-party to review a significant portion of loans within these segments. Management uses the results of these reviews as part of its annual review process. All credits rated 6 or worse are reviewed on a quarterly basis by management. At origination, management assigns risk ratings to one- to four-family residential loans, home equity loans, residential construction loans, manufactured home loans, and other consumer loans. The Company updates these risk ratings as needed based primarily on delinquency, bankruptcy, or tax delinquency.
	The following tables present the Company’s loans by risk rating at June 30, 2014 and 2013:
	June 30, 2014
			One- to Four-Family			Commercial			Home Equity			Home Equity			Residential			Commercial
						Real Estate			First Lien			Second Lien			Construction			Construction
			(In Thousands)
	Loans rated 1-5		$	104,221		$	184,317		$	36,299		$	39,688		$	3,807		$	36,189
	Loans rated 6		523			12,447			—			7			—			—
	Loans rated 7		2,608			3,986			—			150			—			—
	Loans rated 8		146			—			—			—			—			—
	Loans rated 9		—			—			—			—			—			—
			$	107,498		$	200,750		$	36,299		$	39,845		$	3,807		$	36,189
			Commercial			Manufactured			Automobile and Other			Other Consumer			Total
						Homes			Secured Loans
			(In Thousands)
	Loans rated 1-5		$	49,874		$	21,342		$	7,172		$	2,564		$	485,473
	Loans rated 6		533			160			—			1			13,671
	Loans rated 7		4,349			59			—			1			11,153
	Loans rated 8		—			205			—			—			351
	Loans rated 9		—			—			—			—			—
			$	54,756		$	21,766		$	7,172		$	2,566		$	510,648
	LOANS (Continued)
	June 30, 2013
			One- to Four-Family			Commercial			Home Equity			Home Equity			Residential			Commercial
						Real Estate			First Lien			Second Lien			Construction			Construction
			(In Thousands)
Loans rated 1-5		$	105,529		$	153,513		$	36,093		$	41,963		$	3,736		$	21,237
Loans rated 6		835			7,624			—			—			—			—
Loans rated 7		686			6,244			—			115			—			—
Loans rated 8		567			—			—			250			—			—
Loans rated 9		—			—			—			—			—			—
		$	107,617		$	167,381		$	36,093		$	42,328		$	3,736		$	21,237
		Commercial			Manufactured			Automobile and Other			Other Consumer			Total
					Homes			Secured Loans
		(In Thousands)
Loans rated 1-5		$	36,827		$	21,398		$	7,682		$	1,678		$	429,656
Loans rated 6		994			146			—			—			9,599
Loans rated 7		5,745			36			—			1			12,827
Loans rated 8		—			136			—			—			953
Loans rated 9		—			—			—			—			—
		$	43,566		$	21,716		$	7,682		$	1,679		$	453,035
The results of the Company’s quarterly loan review process are summarized by, and appropriate recommendations and loan loss allowances are approved by, the Loan Review Committee (the “Committee”). All supporting documentation with regard to the evaluation process, loan loss experience, allowance levels and the schedules of classified loans is maintained by the Company. The Committee is chaired by the Company’s Chief Financial Officer. The allowance for loan losses calculation is presented to the Board of Directors on a quarterly basis with recommendations on its adequacy.
The Company had no new TDR loan relationships in the year ended June 30, 2014. During fiscal 2014 and 2013, there were no TDR loans that were restructured within the previous twelve months that had any payment defaults.
The Company had two new TDR loan relationships in the year ended June 30, 2013. One loan relationship consists of a commercial real estate loan with a pre-modification balance totaling $528,000 and post-modification balance totaling $551,000. An impairment amount of $13,000 was calculated from the present value of expected future cash flows discounted at the loan’s effective interest rate. The Company capitalized the interest and expenses and restructured the payments for this loan. The second new TDR loan relationship is a commercial loan with a pre-modification and post-modification balance totaling $1.0 million.  The restructure did not result in any impairment from the present value of expected future cash flows discounted at the loan’s effective interest rate. The Company restructured the payments for this loan.
The Company had two new TDR loan relationships in the year ended June 30, 2012. One loan relationship consists of a home equity loan and a one-to-four family residential loan with pre-modification balances aggregating $225,000 and post-modification balances aggregating $232,000. The Company capitalized the interest and expenses and restructured the payments for these loans. The restructure did not result in any impairment from the present value of expected future cash flows discounted at the loan’s effective interest rate. The second was a commercial loan totaling $686,000 where the maturity date was extended by two years and a small impairment amount was calculated from the present value of expected future cash flows discounted at the loan’s effective interest rate. One TDR loan relationship that was restructured as of June 30, 2011 had payment defaults during the year ended June 30, 2012. This loan relationship included four loans comprised of two one-to-four family residential loans totaling $199,000, one home equity loan totaling $26,000, and one commercial real estate loan totaling $170,000 as of June 30, 2012.
LOANS (Continued)
The following are summaries of past due and non-accrual loans:
		30-59 Days			60-89 Days			90 Days			Total			Loans on
		Past Due			Past Due			or Greater			Past Due			Non-accrual
								Past Due
June 30, 2014		(In Thousands)
Mortgage loans on real estate:
One- to four-family		$	607		$	236		$	2,437		$	3,280		$	2,755
Commercial		583			—			—			583			534
Home equity:
First lien		—			—			—			—			—
Second lien		159			—			111			270			150
Commercial		—			—			1,500			1,500			1,500
Consumer:
Manufactured homes		304			27			240			571			240
Automobile and other		—			—			—			—			—
secured loans
Other		12			1			—			13			—
Total		$	1,665		$	264		$	4,288		$	6,217		$	5,179
June 30, 2013
Mortgage loans on real estate:
One- to four-family		$	642		$	—		$	1,013		$	1,655		$	1,405
Commercial		148			—			—			148			148
Home equity:
First lien		—			—			—			—			—
Second lien		180			29			268			477			335
Commercial		16			75			1,984			2,075			1,988
Consumer:
Manufactured homes		115			—			103			218			103
Automobile and other		18			—			—			18			—
secured loans
Other		1			—			—			1			—
Total		$	1,120		$	104		$	3,368		$	4,592		$	3,979
At June 30, 2014 and 2013, there were no loans past due 90 days or more and still accruing.
LOANS (Continued)
The following are summaries of impaired loans:
	June 30, 2014									June 30, 2013
	Recorded			Unpaid			Related			Recorded			Unpaid			Related
	Investment			Principal			Allowance			Investment			Principal			Allowance
				Balance									Balance
	(In Thousands)
Impaired loans without a valuation allowance:
Mortgage loans on real estate:
One- to four-family	$	2,755		$	2,814		$	—		$	1,405		$	1,676		$	—
Commercial	3,147			3,147			—			5,962			5,962			—
Home equity:
Second lien	150			170			—			335			335			—
Other loans:
Commercial	2,952			2,952			—			4,408			4,415			—
Manufactured homes	239			275			—			103			103			—
Total	9,243			9,358			—			12,213			12,491			—
Impaired loans with a valuation allowance:
Mortgage loans on real estate:
Commercial	537			537			11			2,208			2,208			32
Other loans:
Commercial	—			—			—			533			533			—
Total	537			537			11			2,741			2,741			32
Total impaired loans	$	9,780		$	9,895		$	11		$	14,954		$	15,232		$	32
LOANS (Continued)
At June 30, 2014, the Company has no impaired loans with additional funds committed to be advanced.  Information pertaining to impaired loans for the years ended June 30, 2014, 2013 and 2012 are as follows:
	Year Ended June 30, 2014									Year Ended June 30, 2013									Year Ended June 30, 2012
	Average			Interest Income						Average			Interest Income						Average			Interest Income
	Recorded			Recognized			Recognized			Recorded			Recognized						Recorded			Recognized			Recognized
	Investment						on a Cash			Investment on						Recognized			Investment						on a Cash
	on Impaired						Basis			Impaired						on a Cash			on Impaired						Basis
	Loans									Loans						Basis			Loans
	(In Thousands)
Mortgage loans on real estate:
One- to four-family	$	1,682		$	36		$	33		$	1,506		$	69		$	69		$	1,789		$	89		$	89
Commercial	5,905			252			17			10,795			682			682			10,482			701			685
Home equity:
First lien	—			—			—			34			2			2			—			—			—
Second lien	214			5			5			238			11			7			253			4			4
Construction:
Commercial	—			—			—			—			—			—			232			15			15
Commercial	4,199			131			6			4,294			138			138			4,606			226			226
Consumer:
Manufactured homes	112			1			1			131			11			—			104			—			1
Total loans	$	12,112		$	425		$	62		$	16,998		$	913		$	898		$	17,466		$	1,035		$	1,020
Information pertaining to activity in the allowance for loan losses for the years ended June 30, 2014, 2013 and 2012 is as follows:
	One- to Four-Family			Commercial			Home			Home			Residential			Commercial			Commercial			Manufactured			Automobile and			Other			Total
				Real Estate			Equity			Equity			Construction			Construction						Homes			Other Secured			Consumer
							First Lien			Second															Loans
										Lien
	(In Thousands)
Balance at June 30, 2011	$	893		$	2,922		$	196		$	321		$	33		$	32		$	1,020		$	—		$	—		$	56		$	5,473
Charge-offs	(391		)	(166		)	(69		)	—			—			—			(213		)	—			—			(20		)	(859		)
Recoveries	71			16			5			—			—			—			11			—			—			6			109
Provision (credit)	292			(412		)	74			(41		)	5			(12		)	151			375			25			(32		)	425
Balance at June 30, 2012	865			2,360			206			280			38			20			969			375			25			10			5,148
Charge-offs	(185		)	(207		)	—			(70		)	—			—			—			—			(53		)	(29		)	(544		)
Recoveries	8			—			4			—			—			—			104			—			12			7			135
Provision (credit)	74			62			23			92			(5		)	295			(8		)	57			50			35			675
Balance at June 30, 2013	762			2,215			233			302			33			315			1,065			432			34			23			5,414
Charge-offs	(147		)	(22		)	—			(19		)	—			—			—			(189		)	(5		)	(5		)	(387		)
Recoveries	—			—			5			—			—			—			50			—			18			1			74
Provision (credit)	82			95			(34		)	(15		)	(3		)	157			101			174			(17		)	10			550
Balance at June 30, 2014	$	697		$	2,288		$	204		$	268		$	30		$	472		$	1,216		$	417		$	30		$	29		$	5,651
LOANS (Concluded)
Information pertaining to the allowance for loan losses and recorded investment in loans at June 30, 2014, and 2013 are as follows:
	At June 30, 2014
	One- to Four-Family			Commercial Real Estate			Home			Home			Residential Construction			Commercial Construction			Commercial			Manufactured Homes			Automobile			Other Consumer			Total
							Equity			Equity															and Other Secured
							First			Second															Loans
							Lien			Lien
Allowance:	(In Thousands)
Impaired loans	$	—		$	11		$	—		$	—		$	—		$	—		$	—		$	—		$	—		$	—		$	11
Non-impaired loans	697			2,277			204			268			30			472			1,216			417			30			29			5,640
Total allowance for loan losses	$	697		$	2,288		$	204		$	268		$	30		$	472		$	1,216		$	417		$	30		$	29		$	5,651
Loans:
Impaired loans	$	2,755		$	3,684		$	—		$	150		$	—		$	—		$	2,952		$	239		$	—		$	—		$	9,780
Non-impaired loans	104,743			197,066			36,299			39,695			3,807			36,189			51,804			21,527			7,172			2,566			500,868
Total loans	$	107,498		$	200,750		$	36,299		$	39,845		$	3,807		$	36,189		$	54,756		$	21,766		$	7,172		$	2,566		$	510,648
	At June 30, 2013
	One- to Four-Family			Commercial Real Estate			Home			Home			Residential Construction			Commercial Construction			Commercial			Manufactured Homes			Automobile			Other Consumer			Total
							Equity			Equity															and Other Secured
							First			Second															Loans
							Lien			Lien
Allowance:	(In Thousands)
Impaired loans	$	—		$	32		$	—		$	—		$	—		$	—		$	—		$	—		$	—		$	—		$	32
Non-impaired loans	762			2,183			233			302			33			315			1,065			432			34			23			5,382
Total allowance for loan losses	$	762		$	2,215		$	233		$	302		$	33		$	315		$	1,065		$	432		$	34		$	23		$	5,414
Loans:
Impaired loans	$	1,405		$	8,170		$	—		$	335		$	—		$	—		$	4,941		$	103		$	—		$	—		$	14,954
Non-impaired loans	106,212			159,211			36,093			41,993			3,736			21,237			38,625			21,613			7,682			1,679			438,081
Total loans	$	107,617		$	167,381		$	36,093		$	42,328		$	3,736		$	21,237		$	43,566		$	21,716		$	7,682		$	1,679		$	453,035

Premises_and_Equipment

Premises and Equipment	12 Months Ended
	Jun. 30, 2014
Property, Plant and Equipment [Abstract]	'
Premises and Equipment	'
	PREMISES AND EQUIPMENT
	A summary of the cost and accumulated depreciation and amortization is as follows:
		June 30,
		2014			2013			Estimated
								Useful Lives
		(In Thousands)
	Premises:
	Land	$	763		$	763
	Buildings and improvements	5,693			5,616			5 - 39 Years
	Leasehold improvements	2,902			2,811			5 - 10 Years
	Equipment	3,890			3,723			3 - 10 Years
		13,248			12,913
	Accumulated depreciation and amortization	(8,580		)	(7,903		)
		$	4,668		$	5,010
	Depreciation and amortization expense for the years ended June 30, 2014, 2013 and 2012 amounted to $671,000, $734,000 and $764,000, respectively.

Deposits

Deposits	12 Months Ended
	Jun. 30, 2014
Banking and Thrift [Abstract]	'
Deposits	'
	DEPOSITS
	A summary of deposit balances by type is as follows:
		At June 30,
		2014		2013
		(In Thousands)
	Demand	$	84,224	$	74,081
	NOW	42,376		46,220
	Regular and other savings	102,909		104,893
	Money market deposits	99,505		84,277
	Total non-certificate accounts	329,014		309,471
	Term certificates less than $100,000	60,027		67,398
	Term certificates of $100,000 and greater	102,691		97,929
	Total certificate accounts	162,718		165,327
	Total deposits	$	491,732	$	474,798
	At June 30, 2014, the scheduled maturities of time deposits (in thousands) are as follows:
	Year Ending June 30,
	2015	$	68,184
	2016	32,233
	2017	31,646
	2018	13,895
	2019	16,760
		$	162,718

ShortTerm_Borrowings

Short-Term Borrowings	12 Months Ended
	Jun. 30, 2014
Debt Disclosure [Abstract]	'
Short-Term Borrowings	'
	SHORT-TERM BORROWINGS
	Short-term borrowings consist of FHLB advances with an original maturity within one year at a weighted average rate of 0.33% and 0.37%, at June 30, 2014 and 2013, respectively. All borrowings from the FHLB are secured by a blanket lien on qualified collateral, defined principally as 75% of the carrying value of first mortgage and first lien fixed rate home equity loans on owner-occupied residential property, and investments held at Hampden Investment Corporation ("HIC"). All of the assets held at HIC are pledged to the FHLB, at June 30, 2014, total assets of HIC were $108.7 million.
	At June 30, 2014 and 2013, the Company had an Ideal Way Line of Credit available with the FHLB of $2.0 million, of which there were no amounts outstanding. In addition, the Company had lines of credit with the Federal Reserve Bank of Boston and Bankers Bank Northeast totaling $10.0 million and $7.4 million at June 30, 2014, respectively, of which there were no amounts outstanding. As of June 30, 2014, the investments pledged for collateral with the Federal Reserve Bank of Boston had a fair value of $11.3 million.

LongTerm_Debt

Long-Term Debt	12 Months Ended
	Jun. 30, 2014
Debt Disclosure [Abstract]	'
Long-Term Debt	'
	LONG-TERM DEBT
	A summary of outstanding long-term fixed rate advances from the FHLB at June 30, 2014 and 2013 is as follows:
		Amount				Weighted Average Rate
		2014		2013		2014		2013
		(In Thousands)
	Advances maturing
	in the years ending June 30,
	2014	$	—	$	3,754	—	%	1.45	%
	*2015	13,427		6,053		0.53	%	0.85	%
	2016	35,800		28,800		1.3	%	1.47	%
	2017	26,000		25,000		1.92	%	1.95	%
	2018	18,885		18,885		2.09	%	2.09	%
	*2021	8,992		—		1.94	%	—	%
	*2024	9,342		—		2.75	%	—	%
	Total FHLB advances	$	112,446	$	82,492	1.66	%	1.71	%
	* For all starred items at June 30, 2014, includes amortizing advances aggregating $19.6 million requiring combined monthly principal and interest payments of $360,000.
	At June 30, 2014, FHLB advances in the amount of $6.0 million are callable by the FHLB commencing in fiscal year 2015. These advances have maturity dates in fiscal year 2017 and 2018.
	In September 2012, the Company restructured $8.6 million of FHLB borrowings. After the restructuring, the weighted average cost of these borrowings was reduced by 1.00% to 2.74%.

Income_Taxes

Income Taxes	12 Months Ended
	Jun. 30, 2014
Income Tax Disclosure [Abstract]	'
Income Taxes	'
	INCOME TAXES
	Allocation of the federal and state income taxes between current and deferred portions is as follows:
		Years Ended June 30,
		2014				2013				2012
		(In Thousands)
	Current tax provision:
	Federal	$	1,672			$	1,564			$	452
	State	350				392				35
		2,022				1,956				487
	Deferred tax provision (benefit):
	Federal	398				610				1,019
	State	124				(54		)		252
		522				556				1,271
	Change in valuation allowance	—				(735		)		25
		522				(179		)		1,296
	Total tax provision	$	2,544			$	1,777			$	1,783
	The reasons for the differences between the statutory federal income tax rate and the effective tax rates are summarized as follows:
		Years Ended June 30,
		2014			2013			2012
	Statutory tax rate	34	%		34	%		34	%
	Increase (decrease) resulting from:
	State taxes, net of federal tax benefit	4.4			4.7			3.9
	Tax exempt income	(0.8	)		(0.6	)		(0.6	)
	Bank-owned life insurance	(2.4	)		(3.8	)		(3.2	)
	Change in valuation allowance assumptions, net of carryover expiration	—			0.7			0.5
	Stock options	(0.2	)		1.3			1.8
	Other, net	1			1.1			0.8
	Effective income tax rate	36	%		37.4	%		37.2	%
	INCOME TAXES (Continued)
	The components of the net deferred tax asset are as follows:
		June 30,
		2014				2013
		(In Thousands)
	Deferred tax assets:
	Federal	$	3,923			$	4,297
	State	1,132				1,257
		5,055				5,554
	Deferred tax liabilities:
	Federal	(689		)		(786		)
	State	(184		)		(184		)
		(873		)		(970		)
	Net deferred tax asset	$	4,182			$	4,584
	The tax effects of each item that give rise to deferred taxes are as follows:
		June 30,
		2014				2013
		(In Thousands)
	Non-accrued interest income	$	158			$	64
	Net unrealized gain on securities available for sale	(75		)		(195		)
	Depreciation	439				547
	Mortgage servicing rights	(316		)		(261		)
	Allowance for loan losses	2,345				2,261
	Employee benefit plans	1,771				2,234
	Other-than-temporary impairment of securities	—				91
	Other, net	(140		)		(157		)
	Net deferred tax asset	$	4,182			$	4,584
	In fiscal 2013, the Company eliminated its valuation allowance against the deferred tax asset related to its charitable contribution carryforward as it expired. There was a charge of $35,000 to income tax expense as a result of the expiration. In fiscal 2012, the Company increased the valuation allowance by $25,000. The valuation allowance was established to reflect the uncertainty of fully utilizing a five-year charitable contribution carryforward of approximately $3.5 million that expired on October 31, 2012. The carryforward was created primarily by the contribution of 378,566 shares of the Company’s common stock to the Hampden Bank Charitable Foundation as part of the mutual to stock conversion.
	As of June 30, 2014, management believes it is more likely than not that the net deferred tax assets will be realizable through future earnings and future reversals of existing taxable temporary differences.
	The federal income tax reserve for loan losses at the Company's base year amounted to $2.3 million. If any portion of the reserve is used for purposes other than to absorb loan losses, approximately 150% of the amount actually used, limited to the amount of the reserve, would be subject to taxation in the fiscal year in which used. As the Company intends to use the reserves solely to absorb loan losses, a deferred income tax liability of $887,000 has not been provided.
	The Company’s income tax returns are subject to review and examination by federal and state taxing authorities. The Company is currently open to audit under applicable statutes of limitation by the Internal Revenue Service for the years ended October 31, 2011 through June 30, 2013. The Company changed its tax year end to coincide with the Company's fiscal year end, and a short return was filed for the period November 1, 2012 to June 30, 2013. The years open to examination by state taxing authorities vary by jurisdiction. However, no years prior to October 31, 2011 are open.

Commitments_and_Contingencies

Commitments and Contingencies	12 Months Ended
	Jun. 30, 2014
Commitments and Contingencies Disclosure [Abstract]	'
Commitments and Contingencies	'
	COMMITMENTS AND CONTINGENCIES
	In the normal course of business, there are outstanding commitments which are not reflected in the accompanying consolidated balance sheets.
	Loan commitments
	The Company is a party to financial instruments with off-balance-sheet risk in the normal course of business to meet the financing needs of its customers. These financial instruments include commitments to extend credit. These instruments involve, to varying degrees, elements of credit and interest rate risk in excess of the amount recognized in the accompanying consolidated balance sheets.
	The Company's exposure to credit loss is represented by the contractual amount of these commitments. The Company uses the same credit policies in making commitments and conditional obligations as it does for on-balance-sheet instruments. A summary of financial instruments outstanding whose contract amounts represent credit risk is as follows:
		June 30,
		2014		2013
		(In Thousands)
	Commitments to grant loans	$	20,380	$	63,607
	Unadvanced funds on home equity lines of credit	35,718		34,498
	Unadvanced funds on personal lines of credit	1,828		1,852
	Unadvanced funds on commercial lines of credit	37,789		29,882
	Unadvanced funds on construction loans	37,889		25,164
	Standby letters of credit	500		548
	Total loan commitments	$	134,104	$	155,551
	Commitments to extend credit are agreements to lend to a customer as long as there is no violation of any condition established in the contract. Commitments generally have fixed expiration dates or other termination clauses and may require payment of a fee. Commitments to grant loans are generally secured by real estate. Unadvanced lines of credit do not necessarily represent future cash requirements as these commitments may expire without being drawn upon. The Company evaluates each customer's creditworthiness on a case-by-case basis. Funds disbursed on construction loans and home equity lines of credit are collateralized by real estate. Overdraft lines of credit are unsecured.
	Unadvanced funds on commercial lines of credit are generally secured by the business assets of the borrower.
	Standby letters of credit are conditional commitments issued by the Company to guarantee the performance by a customer to a third party. Standby letters of credit are generally secured by cash, business assets, or real estate. The credit risk involved in issuing letters of credit is essentially the same as that involved in extending loan facilities to customers. The amount of the liability related to guarantees at June 30, 2014 and 2013 is not material.
	Operating Leases
	Pursuant to the terms of noncancelable lease agreements in effect at June 30, 2014, pertaining future minimum rent commitments under various operating leases for the years ending June 30, 2015 through 2019 and thereafter amounted to $349,000, $331,000, $330,000, $297,000, $271,000 and $1,567,000, respectively.
	The leases contain options to extend for periods of five and ten year terms. The cost of such rentals is not included above. Rent expense amounted to $366,000, $378,000 and $324,000 for the years ended June 30, 2014, 2013 and 2012, respectively.
	Contingencies
	Various legal claims arise from time to time in the ordinary course of business. In the opinion of management, these claims will have no material effect on the Company's consolidated financial position or results of operations.
	Employment and change-of-control agreements
	The Company entered into an employment agreement with the Company’s Chief Executive Officer and President in October 2012. The employment agreement provides for an annual base salary, subject to increase, and certain other benefits. It also guarantees customary corporate indemnification and insurance coverage under a standard directors’ and officers’ insurance policy throughout the employment term. The initial term of the agreement is three years. The term automatically extends at the conclusion of the initial term for a successive term of twelve months, unless notice not to renew is given by either party, or unless the agreement is earlier terminated by the parties. Following termination of the executive’s employment, the executive must adhere to non-competition and non-disclosure restrictions for one year, or for a period of time equal to the officer’s severance benefit, whichever is longer. Our employment agreement also provides certain termination and change in control benefits and payments. Under the agreement, if within the period ending two years after a change in control as defined in the agreement, Hampden Bank or Hampden Bancorp terminates the executive without “cause” or the executive resigns with “good reason”, as defined in the agreements, the Company’s Chief Executive Officer and President would be entitled to a severance payment equal to two times the average of his annual compensation for the five preceding taxable years.
	The Company entered into change-in-control agreements with certain other officers. Depending on the officer, the change-in-control agreements provide for a severance payment equal to either one or two times the individual’s average annual compensation for the five most recent taxable years.  The terms of each change-in-control agreement may be extended by the Board of Directors of Hampden Bank for an additional year.

Minimum_Regulatory_Capital_Req

Minimum Regulatory Capital Requirements	12 Months Ended
	Jun. 30, 2014
Banking and Thrift [Abstract]	'
Minimum Regulatory Capital Requirements	'
	MINIMUM REGULATORY CAPITAL REQUIREMENTS
	The Company (on a consolidated basis) and the Bank are subject to various regulatory capital requirements administered by the federal banking agencies. Failure to meet minimum capital requirements can initiate certain mandatory, and possibly additional discretionary, actions by regulators that, if undertaken, could have a direct material effect on the Company's and the Bank's consolidated financial statements. Under capital adequacy guidelines and the regulatory framework for prompt corrective action, the Company and Bank must meet specific capital guidelines that involve quantitative measures of their assets, liabilities, and certain off-balance-sheet items as calculated under regulatory accounting practices. The capital amounts and classification are also subject to qualitative judgments by the regulators about components, risk weightings, and other factors. Prompt corrective action provisions are not applicable to the Company.
	Quantitative measures established by regulation to ensure capital adequacy require the Company and the Bank to maintain minimum amounts and ratios (set forth in the following table) of total and Tier 1 capital (as defined in the regulations) to risk-weighted assets (as defined) and of Tier 1 capital (as defined) to average assets (as defined). Management believes, as of June 30, 2014 and 2013, that the Company and the Bank meets all capital adequacy requirements to which they are subject.
	As of June 30, 2014, the most recent notification from the Federal Deposit Insurance Corporation categorized the Bank as well capitalized under the regulatory framework for prompt corrective action. To be categorized as well capitalized, the Bank must maintain minimum total risk-based, Tier 1 risk-based, and Tier 1 leverage ratios as set forth in the table. There are no conditions or events since that notification that management believes have changed the Bank's category.
	MINIMUM REGULATORY CAPITAL REQUIREMENTS (Continued)
	The Company's and the Bank's actual and minimum required capital amounts and ratios are as follows:
												Minimum
												To Be Well
								Minimum				Capitalized Under
								For Capital				Prompt Corrective
		Actual						Adequacy Purposes				Action Provisions
		Amount			Ratio			Amount		Ratio		Amount		Ratio
		(Dollars in Thousands)
	As of June 30, 2014
	Total capital (to risk weighted assets):
	Consolidated	$	92,586		18.3	%		$	40,547	8	%	N/A		N/A
	Bank	80,715			15.9			40,570		8		$	50,712	10	%
	Tier 1 capital (to risk weighted assets):
	Consolidated	86,922			17.2			20,273		4		N/A		N/A
	Bank	75,051			14.8			20,285		4		30,427		6
	Tier 1 capital (to average assets):
	Consolidated	86,922			12.2			28,420		4		N/A		N/A
	Bank	75,051			10.6			28,297		4		35,372		5
	As of June 30, 2013
	Total capital (to risk weighted assets):
	Consolidated	$	88,670		19.1	%		$	37,077	8	%	N/A		N/A
	Bank	80,350			17.5			36,788		8		$	45,985	10	%
	Tier 1 capital (to risk weighted assets):
	Consolidated	83,248			18			18,538		4		N/A		N/A
	Bank	74,928			16.3			18,394		4		27,591		6
	Tier 1 capital (to average assets):
	Consolidated	83,248			12.7			26,240		4		N/A		N/A
	Bank	74,928			11.6			25,827		4		32,284		5
	In July 2013, the FDIC and the other federal bank regulatory agencies issued a final rule that will revise their leverage and risk-based capital requirements and the method for calculating risk-weighted assets to make them consistent with agreements that were reached by the Basel Committee on Banking Supervision and certain provisions of the Dodd-Frank Act. Among other things, the rule establishes a new common equity Tier 1 minimum capital requirement (4.5% of risk-weighted assets), increases the minimum Tier 1 capital to risk-based assets requirement (from 4% to 6% of risk-weighted assets) and assigns a higher risk weight (150%) to exposures that are more than 90 days past due or are on nonaccrual status and to certain commercial real estate facilities that finance the acquisition, development or construction of real property. The final rule also requires unrealized gains and losses on certain “available-for-sale” securities holdings to be included for purposes of calculating regulatory capital unless a one-time opt-out is exercised. The rule limits a banking organization's capital distributions and certain discretionary bonus payments if the banking organization does not hold a “capital conservation buffer” consisting of 2.5% of common equity Tier 1 capital to risk-weighted assets in addition to the amount necessary to meet its minimum risk-based capital requirements. The final rule becomes effective for the Company and the Bank on January 1, 2015. The capital conservation buffer requirement will be phased in beginning January 1, 2016 and ending January 1, 2019, when the full capital conservation buffer requirement will be effective. Management believes that the Company and the Bank will continue to exceed all minimum capital ratio requirements.
	MINIMUM REGULATORY CAPITAL REQUIREMENTS (Concluded)
	A reconciliation of the Company’s year-end total stockholders’ equity to the Bank’s regulatory capital is as follows:
		June 30, 2014
		Consolidated			Bank
		(In Thousands)
	Total stockholders' equity per consolidated financial statements	$	87,159		$	87,159
	Adjustments for Tier 1 capital:
	Holding company equity adjustment	—			(11,871		)
	Accumulated gains on securities available for sale, net of tax	(158		)	(158		)
	Mortgage servicing rights	(79		)	(79		)
	Total Tier 1 capital	86,922			75,051
	Adjustments for total capital:
	Unrealized gains on securities available for sale	13			13
	Allowance for loan losses	5,651			5,651
	Total capital per regulatory reporting	$	92,586		$	80,715
		June 30, 2013
		Consolidated			Bank
		(In Thousands)
	Total stockholders' equity per consolidated financial statements	$	83,659		$	83,659
	Adjustments for Tier 1 capital:
	Holding company equity adjustment	—			(8,320		)
	Accumulated gains on securities available for sale, net of tax	(346		)	(346		)
	Mortgage servicing rights	(65		)	(65		)
	Total Tier 1 capital	83,248			74,928
	Adjustments for total capital:
	Unrealized gains on securities available for sale	8			8
	Allowance for loan losses	5,414			5,414
	Total capital per regulatory reporting	$	88,670		$	80,350

Employee_Benefit_Plans

Employee Benefit Plans	12 Months Ended
	Jun. 30, 2014
Compensation and Retirement Disclosure [Abstract]	'
Employee Benefit Plans	'
	EMPLOYEE BENEFIT PLANS
	401(k) plan
	The Company provides a 401(k) retirement savings plan for eligible employees. Each employee reaching the age of 21 and having completed at least 1,000 hours of service in a twelve-month period automatically becomes a participant in the plan. For participating employees, the Company contributes an amount equal to 3% of each employee’s compensation for the plan year to their participation account and makes matching contributions equal to 50% of the first 2% of each participant’s deferred compensation for the plan year. Contributions for the years ended June 30, 2014, 2013 and 2012 amounted to $257,000, $268,000 and $220,000, respectively.
	Supplemental retirement benefits
	The Company has entered into supplemental retirement benefit agreements with certain officers and directors which provide for annual retirement benefits. The present value of future payments is being accrued monthly over the required service periods. Supplemental retirement benefit expense for the years ended June 30, 2014, 2013 and 2012 amounted to $246,000,
	EMPLOYEE BENEFIT PLANS (Concluded)
	$306,000 and $382,000, respectively. In connection with the supplemental retirement agreements, the Company maintains a liability account with balances of $2.3 million and $3.3 million at June 30, 2014 and 2013, respectively.
	Employee Stock Ownership Plan
	The Company contributed funds to a subsidiary, Hampden LS, Inc., to enable it to make a 15-year loan to the ESOP to allow it to purchase shares of the Company common stock. On January 16, 2007, the ESOP purchased 635,990 shares, or 8% of the 7,949,879 shares issued in the Company’s initial public offering. This plan is a tax-qualified retirement plan for the benefit of eligible Company employees.  The plan is created for the purpose of providing retirement benefits to participants and their beneficiaries in a manner consistent with the requirements of the Internal Revenue Code and Title I of ERISA. Eligible employees who have attained age 21 and have been employed by the Company for three months as of January 16, 2007 were eligible to participate in the plan. Thereafter, employees who have attained the age of 21 and have completed 1,000 hours of service during a continuous 12-month period will be eligible to participate as of the first entry date following completion of the plan’s eligibility requirements.
	At June 30, 2014, the principal balance on the ESOP debt is payable over the years ending June 30, 2015 to 2019 and thereafter in the amount of $399,000, $432,000, $467,000, $506,000, $548,000, and $1.9 million, respectively.
	The Company has committed to make contributions to the ESOP sufficient to support the debt service of the loan. The loan is secured by the shares purchased, which are held in a suspense account and allocated among the participants as the loan is repaid. 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.
	Shares held by the ESOP include the following:
		June 30,
		2014	2013	2012
	Allocated	243,956	232,721	199,907
	Committed to be allocated	21,200	21,200	21,200
	Unallocated	317,998	360,397	402,796
		583,154	614,318	623,903
	Total compensation expense for the years ended June 30, 2014, 2013 and 2012 was $685,000, $613,000 and $530,000, respectively. The total fair value of the unallocated shares as of June 30, 2014, and 2013 was $5.4 million.

Equity_Incentive_Plan

Equity Incentive Plan	12 Months Ended
	Jun. 30, 2014
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]	'
Equity Incentive Plan	'
	EQUITY INCENTIVE PLAN
	Stock Options
	Under the Company’s 2008 Equity Incentive Plan (the “Plan”), the Company may grant stock options to its directors, employees, and consultants for up to 794,987 shares of common stock. Both incentive stock options and non-qualified stock options may be granted under the Plan. On April 29, 2008, the Board of Directors of the Company granted stock options to purchase 595,000 shares of common stock to its directors and employees. The exercise price of each option equals the market price of the Company’s stock on the date of grant and the maximum term of each option is 10 years. For the options that were awarded on April 29, 2008, the vesting period is five years from date of grant, with vesting at 20% per year, except that the Company’s options granted to its former chief executive officer vest over four years from date of grant at 25% per year. At June 30, 2014, all of these options were fully vested. During the year ended June 30, 2013, 35,000 stock options with an exercise price of $12.51 per share were awarded to employees and the vesting period is five years from date of grant. During the year ended June 30, 2014, 10,000 stock options with an exercise price of $16.49 per share were awarded to an employee and the vesting period is five years from date of grant. There are 188,987 stock options that are available to be granted as of June 30, 2014. The fair value of each option granted is estimated on the date of grant using the Black-Scholes option-pricing model with the following weighted average assumptions for options granted during the years ended June 30, 2014, 2013 and 2012:
		Years Ended June 30,
		2014				2013				2012
	Fair value	$	4.45			$	3.34			$	3.44
	Expected dividends	1.49		%		1.26		%		0.94		%
	Expected term (years)	6.5				6.5				6.25
	Expected volatility	26.45		%		27.97		%		27.97		%
	Risk-free interest rate	2.84		%		1.75		%		2.19		%
	The expected volatility is based on historical volatility through the date of grant. The risk-free interest rate for periods within the contractual life of the awards is based on the U.S. Treasury yield curve in effect at the time of the grant. The expected term is based on the simplified method calculation allowed for “plain vanilla” share options. The dividend yield assumption is based on the Company’s history and expectation of dividend payouts.
	A summary of options under the Plan for the year ended June 30, 2014 is presented below:
		Shares			Weighted				Weighted Average
					Average				Remaining
					Exercise Price				Contractual Term
					per Share				(in Years)
	Outstanding at June 30, 2013	555,183			$	11.02
	Granted	10,000			16.49
	Exercised	(126,500	)		10.86
	Outstanding at June 30, 2014	438,683			$	11.2			4.4
	Exercisable at June 30, 2014	393,183			$	10.95			3.9
	Share-based compensation expense applicable to stock options was $37,000, $256,000 and $330,000 for the years ended June 30, 2014, 2013 and 2012, respectively, and the recognized tax benefit related to this expense was $13,000, $63,000 and $84,000, respectively. As of June 30, 2014, unrecognized stock-based compensation expense related to nonvested options amounted to $133,000. This amount is expected to be recognized over a weighted average period of 3.3 years.  The intrinsic value of all stock options outstanding and exercisable at June 30, 2014 was $2,484,000 and $2,323,000, respectively. The intrinsic value of stock options that were exercised in fiscal 2014 was $656,000.
	Stock Awards
	Under the Company’s 2008 Equity Incentive Plan, the Company may grant stock awards to its directors, employees and consultants for up to 317,996 shares of common stock. The stock awards vest at 20% - 25% per year. During the year ended June 30, 2013, 3,000 shares of restricted stock were awarded with a grant date fair value of $12.51 per share that vest over a five years period. There were no shares of restricted stock awarded during the year ended June 30, 2014. The fair market value of the stock awards, based on the market price at grant date, is recorded as unearned compensation. Unearned compensation is amortized over the applicable vesting period. The Company recognized compensation expense related to restricted stock awards of $9,000, $247,000 and $596,000 for the years ended June 30, 2014, 2013 and 2012, respectively. The tax benefit related to the vesting of restricted stock awards was $1,000, $105,000 and $42,000 for the years ended June 30, 2014, 2013 and 2012, respectively. As of June 30, 2014, there was $8,000 of total unrecognized compensation cost related to nonvested stock awards granted under the Plan, which is expected to be recognized over a period of 3.1 years.
	A summary of the status of the Company’s stock awards is presented below:
		Nonvested
		Shares
	Balance at June 30, 2013	3,000
	Granted	—
	Vested	(600	)
	Balance at June 30, 2014	2,400
	The aggregate fair value of the stock awards that vested in fiscal year 2014 was $9,000.

Restrictions_on_Dividends_Loan

Restrictions on Dividends, Loans and Advances	12 Months Ended
	Jun. 30, 2014
Equity [Abstract]	'
Restrictions on Dividends, Loans and Advances	'
	RESTRICTIONS ON DIVIDENDS, LOANS AND ADVANCES
	Federal and state banking regulations place certain restrictions on dividends paid and loans or advances made by the Bank to the Company. The total amount of dividends which may be paid at any date is generally limited to the retained earnings of the Bank, and loans or advances are limited to 10% of the Bank’s capital stock and surplus on a secured basis.
	At June 30, 2014, the Bank’s retained earnings available for the payment of dividends was $45.5 million. At June 30, 2014, $29.8 million of the Company’s equity in the net assets of the Bank was restricted. Funds available for loans or advances by the Bank to the Company amounted to $7.5 million.
	In addition, dividends paid by the Bank to the Company would be prohibited if the effect thereof would cause the Bank’s capital to be reduced below applicable minimum capital requirements.
	In 2007, as part of the conversion to a stock company, the Company established a liquidation account in an amount equal to the net worth of the Bank as of the date of the last consolidated balance sheet appearing in the final prospectus distributed in connection with the conversion. The amount of the liquidation account as of June 30, 2014 is $4.3 million; however, this amount will decline over time. The liquidation account is maintained for the benefit of eligible account holders and supplemental eligible account holders who maintain their accounts at the Company after the conversion. The liquidation account will be reduced annually to the extent that such account holders have reduced their qualifying deposits as of each anniversary date. Subsequent increases will not restore an account holder's interest in the liquidation account. In the event of a complete liquidation, each eligible account holder will be entitled to receive balances for accounts then held.

Fair_Value_of_Financial_Instru

Fair Value of Financial Instruments	12 Months Ended
	Jun. 30, 2014
Fair Value Disclosures [Abstract]	'
Fair Value of Financial Instruments	'
	FAIR VALUE OF ASSETS AND LIABILITIES
	Determination of Fair Value
	The Company uses fair value measurements to record fair value adjustments to certain assets and liabilities and to determine fair value disclosures. The fair value of a financial instrument is 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. Fair value is best determined based on quoted market prices. However, in many instances, there are no quoted market prices for the Company’s assets and liabilities. In cases where quoted market prices are not available, fair vales are based on estimates using present value or other valuation techniques. Those techniques are significantly affected by the assumptions used, including the discount rate and estimates for future cash flows. Accordingly, the fair value estimates may not be realized in an immediate settlement of the asset or liability.
	Methods and assumptions for valuing the Company’s financial instruments are set forth below. Estimated fair values are calculated based on the value without regard to any premium or discount that may result from concentrations of ownership of a financial instrument, possible tax ramifications or estimated transaction costs.
	Cash and cash equivalents: The carrying amounts of cash and short-term investments approximate fair values.
	Securities: The securities measured at fair value utilizing Level 1 and Level 2 inputs are government-sponsored enterprises, corporate bonds and other obligations, mortgage-backed securities and common stocks. The fair values used by the Company are obtained from an independent pricing service which are not adjusted by management and, represents either quoted market prices for identical securities, quoted market prices for comparable securities or fair values determined by pricing models that consider observable market data, such as interest rate volatilities, credit spreads and prices from market makers and live trading systems and other market indicators, industry and economic events. Municipal securities are valued utilizing Level 3 inputs. Since there is no readily available market pricing and no active market to sell these securities, management believes that the amortized cost of these securities approximates fair value based on their relatively short terms to maturity.
	FHLB stock: The carrying amount of FHLB stock approximates fair value based upon the redemption provisions of the FHLB.
	Loans held for sale: Fair value of loans held for sale are estimated based on commitments on hand from investors or prevailing market prices.
	Loans: Fair values for loans are estimated using discounted cash flow analysis, using market interest rates currently being offered for loans with similar terms to borrowers of similar credit quality. This analysis assumes no prepayment. Fair values for non-performing loans are estimated using discounted cash flow analysis or underlying collateral values, where applicable.
	Mortgage servicing rights: Mortgage servicing rights (“MSR”) are the rights of a mortgage servicer to collect mortgage payments and forward them, after deducting a fee, to the mortgage lender. The fair value of servicing rights is estimated using a present value cash flow model. The fair value of MSR is highly sensitive to changes in assumptions. Changes in prepayment speed assumptions generally have the most significant impact on the fair value of our MSR. Generally, as interest rates decline, mortgage loan prepayments accelerate due to increased refinance activity, which results in a decrease in the fair value of MSR. As interest rates rise, mortgage loan prepayments slow down, which results in an increase in the fair value of MSR. Thus, any measurement of the fair value of our MSR is limited by the conditions existing and the assumptions utilized as of a particular point in time, and those assumptions may not be appropriate if they are applied at a different point in time.
	Deposits and mortgage escrow accounts: The fair values for non-certificate accounts and mortgage escrow accounts are, by definition, equal to the amount payable on demand at the reporting date (i.e., their carrying amounts). Fair values for certificate accounts are estimated using a discounted cash flow calculation that applies market interest rates currently being offered on certificates to a schedule of aggregated expected monthly maturities on time deposits.
	Short-term borrowings: The carrying amount of short-term borrowings approximates fair value.
	Long-term debt: The fair values of the Company's advances are estimated using discounted cash flow analysis based on current market borrowing rates for similar types of borrowing arrangements.
	FAIR VALUE OF ASSETS AND LIABILITIES (Continued)
	Accrued interest: The carrying amounts of accrued interest approximate fair value.
	Off-balance-sheet instruments: Fair values for off-balance-sheet lending commitments are based on fees currently charged to enter into similar agreements, taking into account the remaining terms of the agreements and the counterparties' credit standing. The estimated fair value of off-balance sheet financial instruments at June 30, 2014 and 2013 was not material.
	The Company does not measure any liabilities at fair value on either a recurring or non-recurring basis.
	Assets Measured at Fair Value on a Recurring Basis
	The following table presents the balances of assets measured at fair value on a recurring basis as of June 30, 2014 and 2013:
			Level 1			Level 2		Level 3		Total
	June 30, 2014		(In Thousands)
	Securities available for sale:
	Debt securities		$	—		$	133,857	$	—	$	133,857
	Marketable equity securities		79			—		—		79
	Mortgage servicing rights		—			—		792		792
	Total		$	79		$	133,857	$	792	$	134,728
	June 30, 2013
	Securities available for sale:
	Debt securities		$	—		$	138,662	$	—	$	138,662
	Marketable equity securities		68			—		—		68
	Mortgage servicing rights		—			—		654		654
	Total		$	68		$	138,662	$	654	$	139,384
	The table below presents, for the years ended June 30, 2014 and 2013, the changes in Level 3 assets that are measured at fair value on a recurring basis:
		Mortgage
		Servicing
		Rights
		(In Thousands)
	Balance as of July 1, 2012	$	445
	Total realized and unrealized gains included in net income	161
	Capitalized servicing assets	48
	Balance as of June 30, 2013	654
	Total realized and unrealized gains included in net income	41
	Capitalized servicing assets	97
	Balance as of June 30, 2014	$	792
	FAIR VALUE OF ASSETS AND LIABILITIES (Continued)
	Assets Measured at Fair Value on a Non-recurring Basis
	Also, the Company may be required, from time to time, to measure certain other financial assets at fair value on a non-recurring basis in accordance with generally accepted accounting principles.  These adjustments to fair value usually result from
	the application of lower-of-cost-or-market accounting or write-downs of individual assets. The following table summarizes the carrying value of the related individual assets as of June 30, 2014 and 2013 all classified in Level 3 fair value hierarchy:
		June 30,
		2014			2013
		(In Thousands)
	Impaired loans	$	461		$	292
	Other real estate owned	309			1,221
	Total	$	770		$	1,513
	During the years ended June 30, 2014, 2013 and 2012 there were no transfers from levels 1, 2, or 3.
	The amount of impaired loans represents the carrying value of loans that include adjustments which are based on the estimated fair value of the underlying collateral. The fair value of collateral used by the Company represents the current tax assessed value, discounted by 20%. This data includes information such as selling price of similar properties, expected future cash flows or earnings of the subject property based on current market expectations, as well as relevant legal, physical and economic factors. If the impaired loan is being actively marketed, the Company uses the realtor’s market analysis or listing price discounted by 10% and less 5% for realtor commission, instead of the tax assessment. The Company had a $102,000 loss on impaired loans for the year ended June 30, 2014 compared to a $103,000 loss and a $121,000 loss for years ended June 30, 2013 and 2012, respectively. Any resulting losses are recognized in earnings through the provision for loan losses. The Company charges off any collateral shortfall on collateral dependent impaired loans.
	The Company classifies property acquired through foreclosure or acceptance of a deed in lieu of foreclosure as OREO in its consolidated financial statements. When property is placed into OREO, it is recorded at the fair value less estimated costs to sell at the date of foreclosure or acceptance of deed in lieu of foreclosure. At the time of transfer to OREO, any excess of carrying value over fair value is charged to the allowance for loan losses. Management, or its designee, inspects all OREO property periodically. Holding costs and declines in fair value result in charges to expense after the property is acquired. The Company had $226,000 loss on OREO, including a charge to the allowance for loan losses, for the year ended June 30, 2014. The Company had no loss on OREO, for the year ended June 30, 2013. The Company had a $362,000 loss on OREO, including a charge to the allowance for loan losses, for the year ended June 30, 2012.
	Summary of Fair Values of Financial Instruments
	The carrying amounts and related estimated fair values of the Company's financial instruments are as follows. Certain financial instruments and all non-financial instruments are exempt from disclosure requirements. Accordingly, the aggregate fair value amounts presented herein may not necessarily represent the underlying fair value of the Company.
	FAIR VALUE OF ASSETS AND LIABILITIES (Concluded)
			Carrying			Fair Value
	June 30, 2014		Amount			Level 1		Level 2		Level 3		Total
			(In Thousands)
Financial assets:
Cash and cash equivalents		$	12,667		$	12,667	$	—	$	—	$	12,667
Securities available for sale		133,936			79		133,857		—		133,936
Securities held to maturity		9,302			—		—		9,302		9,302
Federal Home Loan Bank stock		6,648			—		—		6,648		6,648
Loans held for sale		330			—		330		—		330
Loans, net		507,635			—		—		513,765		513,765
Accrued interest receivable		1,688			—		—		1,688		1,688
Mortgage servicing rights (1)		792			—		—		792		792
Financial liabilities:
Deposits		491,732			—		—		493,500		493,500
Short-term borrowings		4,000			—		4,000		—		4,000
Long-term debt		112,446			—		113,823		—		113,823
Mortgagors' escrow accounts		1,184			—		—		1,184		1,184
(1) Included in other assets.
June 30, 2013
Financial assets:
Cash and cash equivalents		$	25,618		$	25,618	$	—	$	—	$	25,618
Securities available for sale		138,730			68		138,662		—		138,730
Federal Home Loan Bank stock		5,092			—		—		5,092		5,092
Loans held for sale		1,274			—		1,274		—		1,274
Loans, net		450,347			—		—		459,018		459,018
Accrued interest receivable		1,636			—		—		1,636		1,636
Mortgage servicing rights (1)		654			—		—		654		654
Financial liabilities:
Deposits		474,798			—		—		477,059		477,059
Short-term borrowings		4,500			—		4,500		—		4,500
Long-term debt		82,492			—		82,527		—		82,527
Mortgagors' escrow accounts		1,100			—		—		1,100		1,100
(1) Included in other assets.

Parent_Company_Only_Condensed_

Parent Company Only Condensed Financial Statements	12 Months Ended
	Jun. 30, 2014
Condensed Financial Information of Parent Company Only Disclosure [Abstract]	'
Parent Company Only Condensed Financial Statements	'
	PARENT COMPANY ONLY CONDENSED FINANCIAL STATEMENTS
	The condensed financial information pertaining only to the parent company, Hampden Bancorp, Inc., is as follows:
	BALANCE SHEETS
		June 30,
		2014			2013
		(In Thousands)
	Assets
	Cash on hand	$	4,920		$	967
	Short-term investments	—			65
	Cash and cash equivalents	4,920			1,032
	Investment in Hampden Bank	75,289			75,339
	Investment in Hampden LS, Inc.	1,993			1,762
	Deferred tax asset	700			1,221
	Other assets	4,257			4,305
		$	87,159		$	83,659
	Liabilities and Stockholders' Equity
	Stockholders' equity	$	87,159		$	83,659
		$	87,159		$	83,659
	STATEMENTS OF OPERATIONS
		Years Ended June 30,
		2014			2013			2012
		(In Thousands)
	Income:
	Interest on securities	$	—		$	—		$	30
	Interest on cash and short-term investments	—			3			2
	Non-interest income	—			—			18
	Total income	—			3			50
	Operating expenses	951			1,343			1,920
	Loss before income taxes and equity in undistributed net income of subsidiaries	(951		)	(1,340		)	(1,870		)
	Income tax benefit	(250		)	(195		)	(321		)
	Loss before equity in undistributed net income of subsidiaries	(701		)	(1,145		)	(1,549		)
	Equity in undistributed net income of Hampden Bank	4,986			3,878			4,320
	Equity in undistributed net income of Hampden LS, Inc.	230			241			245
	Net income	$	4,515		$	2,974		$	3,016
	PARENT COMPANY ONLY CONDENSED FINANCIAL STATEMENTS (Concluded)
	STATEMENTS OF CASH FLOWS
		Years Ended June 30,
		2014			2013			2012
		(In Thousands)
	Cash flows from operating activities:
	Net income	$	4,515		$	2,974		$	3,016
	Adjustments to reconcile net income to net cash provided by operating activities:
	Dividends in excess of earnings of subsidiaries	5,600			4,500			3,000
	Equity in undistributed net income of Hampden Bank	(4,986		)	(3,878		)	(4,320		)
	Equity in undistributed net income of Hampden LS, Inc.	(230		)	(241		)	(245		)
	Stock-based compensation	46			503			926
	Deferred tax provision (benefit)	521			(69		)	(30		)
	Net change in:
	Accrued interest receivable	—			—			9
	Other assets	(429		)	(1,822		)	16
	Accrued expenses	477			1,508			1,168
	Net cash provided by operating activities	5,514			3,475			3,540
	Cash flows from investing activities:
	Activities in available-for-sale securities:
	Sales	—			15			1,309
	Maturities	—			—			1,933
	Net cash provided by investing activities	—			15			3,242
	Cash flows from financing activities:
	Payment of loan from Hampden LS, Inc.	752			752			752
	Common stock repurchased	(454		)	(5,271		)	(10,410		)
	Payment of dividends on common stock	(1,268		)	(997		)	(820		)
	Other, net	(656		)	(377		)	(742		)
	Net cash used by financing activities	(1,626		)	(5,893		)	(11,220		)
Net increase (decrease) in cash and cash equivalents	3,888			(2,403		)	(4,438		)
Cash and cash equivalents at beginning of year	1,032			3,435			7,873
Cash and cash equivalents at end of year	$	4,920		$	1,032		$	3,435

Quarterly_Data_Unaudited

Quarterly Data (Unaudited)	12 Months Ended
	Jun. 30, 2014
Quarterly Financial Information Disclosure [Abstract]	'
Quarterly Data (Unaudited)	'
	QUARTERLY DATA (UNAUDITED)
	Quarterly results of operations for the years ended June 30, 2014 and 2013 were as follows:
		2014								2013
		Fourth		Third		Second		First		Fourth		Third		Second		First
		Quarter		Quarter		Quarter		Quarter		Quarter		Quarter		Quarter		Quarter
		(Dollars In Thousands, except per share amounts)
	Interest and dividend income	$	6,501	$	6,434	$	6,428	$	6,149	$	6,094	$	5,924	$	6,121	$	6,209
	Interest expense	1,286		1,292		1,331		1,261		1,317		1,346		1,414		1,408
	Net interest income	5,215		5,142		5,097		4,888		4,777		4,578		4,707		4,801
	Provision for loan losses	150		150		150		100		350		100		175		50
	Non-interest income	837		788		911		1,103		986		1,177		1,072		966
	Non-interest expense	3,922		4,184		4,260		4,005		4,448		4,346		4,381		4,464
	Provision for income taxes	714		575		577		679		347		485		453		492
	Net income	$	1,266	$	1,021	$	1,021	$	1,207	$	618	$	824	$	770	$	761
	Basic earnings per share	$	0.24	$	0.19	$	0.19	$	0.23	$	0.12	$	0.15	$	0.14	$	0.14
	Diluted earnings per share	$	0.23	$	0.19	$	0.19	$	0.22	$	0.11	$	0.15	$	0.14	$	0.14
	Weighted average shares outstanding:
	Basic	5,327,928		5,313,484		5,300,289		5,274,900		5,372,849		5,389,400		5,401,349		5,495,803
	Diluted	5,458,803		5,439,177		5,443,078		5,401,982		5,519,703		5,560,481		5,527,472		5,584,946
	Quarterly data may not sum to annual data due to rounding.

Subsequent_Events

Subsequent Events	12 Months Ended
	Jun. 30, 2014
Subsequent Events [Abstract]	'
Subsequent Events	'
	SUBSEQUENT EVENTS
	On July 1, 2014, the Company announced that The Board of Directors the Company and the Bank unanimously elected Robert A. Massey, as Chief Operating Officer of the Company and the Bank effective as of July 1, 2014. In addition, the Board of Directors of the Company and the Bank unanimously elected Tara G. Corthell, as Chief Financial Officer and Treasurer of the Company and the Bank effective as of July 1, 2014.
	On August 5, 2014, the Company announced that its Board of Directors had declared a cash dividend of $0.08 per common share. The dividend was paid on August 29, 2014 to shareholders of record as of August 15, 2014.
	On September 10, 2014, the Company repurchased 122,700 shares of Company stock for $2.1 million, at an average price of $17.00 per share pursuant to the Company’s previously announced stock repurchase programs.

Summary_of_Significant_Account1

Summary of Significant Accounting Policies (Policies)	12 Months Ended
	Jun. 30, 2014
Accounting Policies [Abstract]	'
Basis of Presentation and Consolidation	'
	Basis of Presentation and Consolidation
	The accompanying consolidated financial statements include the accounts of Hampden Bancorp, Inc. (the “Company”), a Delaware corporation, and its wholly-owned subsidiaries, Hampden Bank (the “Bank”) and Hampden LS, Inc.  Hampden Bank is a Massachusetts-chartered stock savings bank. The Company contributed funds to Hampden LS, Inc. to enable it to make a 15-year loan to the Employee Stock Ownership Plan (“ESOP”) to allow it to purchase shares of the Company’s common stock. The Bank has three wholly-owned subsidiaries: Hampden Investment Corporation and Hampden Investment Corporation II, which engage in buying, selling, holding and otherwise dealing in securities, and Hampden Insurance Agency, which is inactive.  All significant intercompany accounts and transactions have been eliminated in consolidation.
Use of Estimates	'
	Use of Estimates
	In preparing consolidated financial statements in conformity with accounting principles generally accepted in the United States of America, management is required to make estimates and assumptions that affect the reported amounts of assets and liabilities as of the date of the consolidated balance sheet and reported amounts of revenues and expenses during the reporting period. Actual results could differ from those estimates. The determination of the allowance for loan losses and the valuation of deferred tax assets are material estimates that are particularly susceptible to significant change in the near term.
Business and Operating Segments	'
	Business and Operating Segments
	The Company provides a variety of financial services to individuals and small businesses through its Internet operations and ten offices in Hampden County, Massachusetts, and surrounding communities. Its primary deposit products are checking, savings and term certificate accounts and its primary lending products are residential mortgage and commercial loans.
	Financial information is reported on the basis that it is used internally for evaluating segment performance and deciding how to allocate resources to segments. Management evaluates the Company's performance and allocates resources based on a single segment concept. Accordingly, there are no separately identified material operating segments for which discrete financial information is available. The Company does not derive revenues from, or have assets located in foreign countries, nor does it derive revenues from any single customer that represents 10% or more of the Company's total revenues.
Reclassification	'
	Reclassification
	Amounts in prior years consolidated financial statements are reclassified where necessary to conform to the current year presentation.
Cash and Cash Equivalents and Statements of Cash Flows	'
	Cash and Cash Equivalents and Statements of Cash Flows
	Cash and due from banks, federal funds sold and short-term investments with original maturities of less than 90 days are recognized as cash equivalents in the consolidated statements of cash flows. Federal funds sold generally mature in one day. Cash flows from loans and deposits are reported on a net basis, except for loan purchases. The Company maintains amounts due from banks that, at times, may exceed federally insured limits. The Company has not experienced any losses from such concentrations.
Securities	'
	Securities
	Debt securities that management has the positive intent and ability to hold to maturity are classified as "held to maturity" and recorded at amortized cost. Securities not classified as held to maturity, including equity securities with readily determinable fair values, are classified as "available for sale" and recorded at fair value, with unrealized gains and losses excluded from earnings and reported in other comprehensive income.
	Purchase premiums and discounts are recognized in interest income using the interest method over the terms of the securities. Realized gains and losses on disposition of securities are recorded on the trade date and determined using the specific identification method.
Fair Value Hierarchy	'
	Fair Value Hierarchy
	The Company groups its assets generally measured 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 the fair value, as follows:
	Level 1:	Inputs to the valuation methodology are quoted prices, unadjusted, for identical assets in active markets. A quoted price in an active market provides the most reliable evidence of fair value and is used to measure fair value whenever available.
	Level 2:	Inputs to the valuation methodology include quoted prices for similar assets in active markets; inputs to the valuation methodology include quoted prices for identical or similar assets in markets that are not active; or inputs to the valuation methodology that are derived principally from or can be corroborated by observable market data by correlation or other means.
	Level 3:	Inputs to the valuation methodology are unobservable and significant to the fair value measurement. Level 3 assets include financial instruments whose value is determined using discounted cash flow methodologies, as well as instruments for which the determination of fair value requires significant management judgment or estimation.
	Transfers between levels are recognized at the end of a reporting period if applicable.
Federal Home Loan Bank Stock	'
	Federal Home Loan Bank Stock
	The Bank, as a member of the Federal Home Loan Bank of Boston ("FHLB"), is required to invest in shares of $100 par value stock of the FHLB in the amount of 1% of the Bank’s outstanding residential loans or 5% of its outstanding advances from the FHLB, whichever is higher. Based on redemption provisions of the FHLB, the stock has no quoted market value and is carried at cost. At its discretion, the FHLB may declare dividends on its stock. The Company reviews its investment in FHLB stock for impairment based on the ultimate recoverability of the cost basis in the FHLB stock. As of June 30, 2014, no impairment has been recognized.
Loans Held for Sale	'
	Loans Held for Sale
	Loans originated and intended for sale in the secondary market are carried at the lower of amortized cost or fair value in the aggregate, as determined by outstanding commitments from investors or current investor yield requirements. Net unrealized losses, if any, are recognized through a valuation allowance by charges to non-interest income. Gains or losses on sales of mortgage loans are recognized based on the difference between the selling price and the carrying value of the related mortgage loans sold. As of June 30, 2014 and 2013, the Company had no material derivative loan commitments.
Loans	'
	Loans
	The Company grants mortgage, commercial, and consumer loans to customers. A substantial portion of the loan portfolio consists of mortgage loans in Hampden and Hampshire Counties, Massachusetts, and surrounding communities. The ability of the Company's debtors to honor their contracts is dependent upon the local real estate market and economy.
	Loans that management has the intent and ability to hold for the foreseeable future or until maturity or pay-off generally are reported at their outstanding unpaid principal balances adjusted for charge-offs, the allowance for loan losses, and any deferred fees or costs on originated and purchased loans. 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 related loan yield using the interest method.
	The accrual of interest on mortgage and commercial loans is discontinued when reasonable doubt exists as to the full collection of interest and principal or at the time the loan is 90 days past due unless the credit is well-secured and in process of collection. Other personal loans are typically charged off no later than 180 days past due. Past due status is based on the contractual term of the loans. In all cases, loans are placed on non-accrual or charged-off at an earlier date if collection of principal or interest is considered doubtful. All interest accrued but not collected for loans that are placed on non-accrual or charged off is reversed against interest income. The interest on these loans is accounted for on the cash-basis or cost-recovery method, until qualifying for return to accrual status. Loans are reclassified to accrual status once the borrower has shown the ability and an acceptable history of repayment of six months. The Company may also return a loan to accrual status if the borrower evidences sufficient cash flow to service the debt and provides additional collateral to support the collectability of the loan.
Allowance for Loan Losses	'
	Allowance for Loan Losses
	The allowance for loan losses is established as losses are estimated to have occurred through a provision for loan losses charged to earnings. Loan losses are charged against the allowance when management believes the uncollectibility of a loan balance is confirmed. Subsequent recoveries, if any, are credited to the allowance.
	The allowance for loan losses is evaluated on a quarterly basis by management and is based upon management's periodic review of the collectability of the loans in light of historical experience, the nature and volume of the loan portfolio, adverse situations that may affect the borrower's ability to repay, estimated value of any underlying collateral and prevailing economic conditions. This evaluation is inherently subjective as it requires estimates that are susceptible to significant revision as more information becomes available.
	The analysis of the allowance for loan losses has two components: specific and general allocations, which are further described below.
	Specific allocation
	Specific loss allocations are made for loans determined to be impaired. Specific allocations result in a charge-off if the likelihood of loss is evaluated as probable. The Company’s policy for charging off uncollectible loans is based on an analysis of the financial condition of the borrower and/or the collateral value. To determine the adequacy of collateral on a particular loan, an estimate of the fair value of the collateral is based on the most current appraised value, tax assessed value, discounted cash flow valuation or other available information.
	A loan is considered impaired when, based on current information and events, it is probable that a creditor will be unable to collect the scheduled payments of principal and interest when due according to the contractual terms of the loan agreement. Impaired loans are generally placed on non-accrual status either when there is reasonable doubt as to the full collection of payments or when the loans become 90 days past due unless an evaluation clearly indicates that the loan is well secured and in the process of collection. Impairment is measured on a loan by loan basis by either the present value of expected future cash flows discounted at the loan’s effective interest rate, or the fair value of the collateral, adjusted for selling expenses, if the loan is collateral dependent.
	The Company may periodically agree to modify the contractual terms of loans. When a loan is modified and a concession is made to a borrower experiencing financial difficulty, the modification is considered a troubled debt restructuring (“TDR”). All TDRs are initially classified as impaired.
	Large groups of smaller balance homogeneous loans are collectively evaluated for impairment unless such loans are subject to a troubled debt restructuring agreement.
	General allocation
	The general allocation is determined by segregating the remaining loans, by loan segment and payment history. Consideration is given to historical loss experience, and qualitative factors such as delinquency trends, changes in underwriting standards or lending policies, procedures and practices, experience and depth of management and lending staff, and general economic conditions. This analysis establishes loss factors that are applied to the loan groups to determine the amount of the general allocations. This evaluation is inherently subjective as it requires material estimates that may be susceptible to significant revisions based upon changes in economic and real estate market conditions. Actual loan losses may be significantly more than the allowance for loan losses that have been established which could have a material negative effect on financial results. There were no changes in the Company’s policies or methodology pertaining to the general component of the allowance for loan losses during the year ended June 30, 2014.
	On a quarterly basis, management’s Loan Review Committee reviews the current status of various loan assets in order to evaluate the adequacy of the allowance for loan losses. In this evaluation process, specific loans are analyzed to determine their potential risk of loss. This process concentrates on non-accrual and classified loans with risk ratings of six or higher. Any loan determined to be impaired is evaluated for potential loss exposure as previously described.
	The qualitative factors are assessed based on the various risk characteristics of each loan segment. Risk characteristics relevant to each portfolio segment are as follows:
	Residential real estate – The Company generally does not originate loans with a loan-to-value ratio greater than 80 percent unless there is private mortgage insurance. All loans in this segment are collateralized by one- to four-family residential real estate and repayment is dependent on the credit quality of the individual borrower. The overall health of the economy, including unemployment rates and housing prices, will have an effect on the credit quality in this segment.
	Commercial real estate – Loans in this segment are primarily income-producing properties throughout Massachusetts and Connecticut. The underlying cash flows generated by the properties can be adversely impacted by a downturn in the economy as evidenced by increased vacancy rates, which in turn, will have an effect on the credit quality in this segment. Management requires annual borrower financial statements, obtains rent rolls annually and continually monitors the cash flows of these loans.
	Home equity loans - Home equity loans are broken out into two segments, secured by first or second mortgages on one- to four-family owner occupied properties, and are generally underwritten in amounts such that the combined first and second mortgage balances generally do not exceed 85% of the value of the property serving as collateral at time of origination. The lines of credit are available to be drawn upon for 10 to 20 years, at the end of which time they become term loans amortized over 5 to 10 years. Interest rates on home equity lines normally adjust based on the month-end prime rate published in the Wall Street Journal.
	Residential construction loans – Loans in this segment primarily include non-speculative real estate loans. All loans in this segment are collateralized by one- to four-family residential real estate and repayment is dependent on the credit quality of the individual borrower. The overall health of the economy, including unemployment rates and housing prices, will have an effect on the credit quality in this segment.
	Commercial construction loans – Loans in this segment primarily include construction to permanent non-speculative real estate loans. The underlying cash flows generated by the properties are adversely impacted by a downturn in the economy, which in turn, will have an effect on the credit quality in this segment.
	Commercial loans – Loans in this segment are made to businesses and are generally secured by assets of the business. Repayment is expected from the cash flows of the business. A weakened economy, and resultant decreased consumer spending, will have an effect on the credit quality in this segment.
	Manufactured home loans – Loans in this segment are secured by first liens on properties located primarily in the Northeast. Repayment is dependent on the credit quality of the individual borrower. The overall health of the economy, including unemployment rates, will have an effect on the credit quality in this segment.
	Automobile and other secured loans – Loans in this segment include consumer non-real estate secured loans that the Company originates as well as automobile loans that the Company purchases from third parties. The Company has the ability to select the automobile loans it purchases based on its own underwriting standards.
	Other consumer loans – Loans in this segment are generally unsecured and repayment is dependent on the credit quality of the individual borrower.
	Troubled Debt Restructurings
	A modified loan is considered a TDR when two conditions are met: (1) the borrower is experiencing financial difficulty and (2) concessions are made by the Company that would not otherwise be considered for a borrower with similar risk characteristics. The most common types of modifications include below market interest rate reductions, deferrals of principal and maturity extensions. Modified terms are dependent upon the financial position and needs of the individual borrower. If the modification agreement is violated, the loan is handled by the Company's Collections Department for resolution, which may result in foreclosure. The Company's determination of whether a loan modification is a TDR considers the individual facts and circumstances surrounding each modification.
	The Company's nonaccrual policy is followed for TDRs. If the loan was current prior to modification, nonaccrual status may not be required. If the loan was on nonaccrual prior to modification or if the payment amount significantly increases, the loan will remain on nonaccrual for a period of at least six months. Loans qualify for return to accrual status once the borrower has demonstrated the willingness and the ability to perform in accordance with the restructured terms of the loan agreement for a period of not less than six months and future payments are reasonably assured.
	TDR classifications may be removed if the borrower demonstrates compliance with the modified terms and the restructuring agreement specifies an interest rate equal to that which would be provided to a borrower with similar risk characteristics at the time of restructuring. All TDRs are initially reported as impaired.
Loan Servicing	'
	Loan Servicing
	Servicing assets are recognized as separate assets at fair value when rights are acquired through purchase or through sale of financial assets. Fair value is based on market prices for comparable mortgage servicing contracts, when available, or alternatively, is based on a valuation technique using the present value of estimated future cash flows calculated using current market discount rates. Servicing assets are measured at fair value at each reporting period and changes in fair value are recognized in other non-interest income in the period in which the change occurs.
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.
	During the normal course of business, the Company may transfer a portion of a financial asset, for example, a participation loan or the government guaranteed portion of a loan. In order to be eligible for sales treatment, the transfer of the portion of the loan must meet the criteria of a participating interest. If it does not meet the criteria of a participating interest, the transfer must be accounted for as a secured borrowing. In order to meet the criteria for a participating interest, all cash flows from the loan must be divided proportionately, the rights of each loan holder must have the same priority, the loan holders must have no recourse to the transferor other than standard representations and warranties and no loan holder can have the right to pledge or exchange the entire loan.
Bank-Owned Life Insurance	'
	Bank-Owned Life Insurance
	Bank-owned life insurance policies are reflected on the consolidated balance sheet at cash surrender value. Changes in cash surrender value are reflected in non-interest income on the consolidated statement of net income and are not subject to income taxes.
Premises and Equipment	'
	Premises and Equipment
	Land is carried at cost. Buildings, leasehold improvements and equipment are stated at cost, less accumulated depreciation and amortization, computed on the straight-line method over the estimated useful lives of the assets or the expected term of the lease, if shorter. Expected terms include lease option periods to the extent that the exercise of such options is reasonably assured. The cost of maintenance and repairs is expensed as incurred.
Other Real Estate Owned	'
	Other Real Estate Owned
	The Company classifies property acquired through foreclosure or acceptance of a deed in lieu of foreclosure as other real estate owned (“OREO”) in its consolidated financial statements. When property is placed into OREO, it is recorded at the fair value less estimated costs to sell at the date of foreclosure or acceptance of deed in lieu of foreclosure. At the time of transfer to OREO, any excess of carrying value over fair value less estimated cost to sell is charged to the allowance for loan losses. Management, or its designee, inspects all OREO property periodically. Holding costs and declines in fair value subsequent to transfer result in charges to non-interest expense
Advertising Costs	'
	Advertising Costs
	All advertising costs are expensed as incurred.
Income Taxes	'
	Income Taxes
	The Company uses the asset and liability method of accounting for income taxes. Under this method, deferred tax assets and liabilities are recognized for the future tax consequences attributable to differences between the financial statement carrying amounts of existing assets and liabilities and their respective tax bases. Deferred tax assets and liabilities are measured using enacted tax rates expected to apply to taxable income in the years in which those temporary differences are expected to be recovered or settled. As changes in the tax laws or rates are enacted, deferred tax assets and liabilities are adjusted accordingly through the provision for income taxes. The Company's base amount of its federal income tax reserve for loan losses is a permanent difference for which there is no recognition of a deferred tax liability. However, the loan loss allowance maintained for financial reporting purposes is a temporary difference with allowable recognition of a related deferred tax asset, if it is deemed realizable. The Company exercises significant judgment in evaluating the amount and timing of recognition of the resulting tax assets and liabilities. These judgments require projections of future taxable income. These judgments and estimates, which are inherently subjective, are reviewed periodically as regulatory and business factors change. Deferred tax assets are reduced by a valuation allowance when, in the opinion of management, it is more likely than not that all or some portion of the deferred tax assets will not be realized.
	The Company has no material uncertain tax positions as of June 30, 2014 or 2013.
	The Company records interest and penalties as part of income tax expense. No interest and penalties were recorded for the years ended June 30, 2014, 2013 and 2012.
	Income tax benefits related to stock compensation in excess of grant date fair value less any proceeds on exercise are recognized as an increase to additional paid-in capital upon vesting or exercising and delivery of the stock. Any income tax effects related to stock compensation that are less than grant date fair value less any proceeds on exercise would be recognized as a reduction of additional paid-in capital to the extent of previously recognized income tax benefits and then through income tax expense for the remaining amount.
Treasury Stock	'
	Treasury Stock
	Common stock shares repurchased are recorded as treasury stock at cost.
Equity Incentive Plan	'
	Equity Incentive Plan
	The Company measures compensation cost relating to share-based payment transactions based on the grant date fair value of the equity instruments issued. Compensation cost is recognized over the vesting period of such awards on a straight-line basis. Unrecognized compensation cost applicable to restricted stock awards is recorded as unearned compensation and a reduction of stockholders’ equity. The fair value of stock option awards are estimated on the date of grant using the Black-Scholes option pricing model, which includes several assumptions such as expected volatility, dividends, term and risk-free rate for each stock option award. See Note 14 for additional information. Reductions in compensation expense associated with forfeited awards are estimated at the grant date, and this estimated forfeiture rate is adjusted based on actual forfeiture experience.
Employee Stock Ownership Plan	'
	Employee Stock Ownership Plan
	Compensation expense is recognized based on the fair value of shares at the time they are committed to be released to the Employee Stock Ownership Plan (“ESOP”) participants. All shares held by the ESOP that are released and committed to be released are deemed outstanding for purposes of earnings per share calculations. The value of unearned shares to be allocated to ESOP participants for future services not yet performed is recorded as unearned compensation and a reduction of stockholders’ equity.
Comprehensive income/loss	'
	Comprehensive Income/loss
	Accounting principles generally require that recognized revenue, expenses, gains and losses be included in net income. Although certain changes in assets and liabilities, such as unrealized gains and losses on available-for-sale securities, are reported as a separate component of the stockholders’ equity section of the consolidated balance sheet, such items, along with net income, are components of comprehensive income.
Earnings Per Common Share	'
	Earnings Per Common Share
	Basic earnings per share ("EPS") excludes dilution and is calculated by dividing net income available to common stockholders by the weighted-average number of shares of common stock outstanding during the period. Diluted EPS is computed in a manner similar to that of basic EPS except that the weighted-average number of common shares outstanding is increased to include the number of incremental common shares (computed using the treasury stock method) that would have been outstanding if all potentially dilutive common stock equivalents (such as unvested restricted stock or shares subject to options) were issued during the period. Unallocated common shares held by the ESOP are shown as a reduction of stockholders' equity, and are included in the weighted-average number of common shares outstanding for both basic and diluted earnings per share calculations when committed to be released. Unvested restricted shares are not considered outstanding in the computation of basic earnings per share since the rights to the dividends are forfeitable.
Recent Accounting Pronouncements	'
	Recent Accounting Pronouncements
	In February 2013, the Financial Accounting Standards Board ("FASB") issued Accounting Standards Update ("ASU") No. 2013-2 Comprehensive Income (Topic 220), Reporting of Amounts Reclassified Out of Accumulated Other Comprehensive Income. The standard requires that companies present either in a single note or parenthetically on the face of the financial statements, the effect of significant amounts reclassified from each component of accumulated other comprehensive income based on its source and the income statement line items affected by the reclassification. The new requirements took effect for public companies in fiscal years, and interim periods within those years, beginning after December 15, 2012. This ASU guidance did not have a material impact on the Company’s consolidated financial statements.
	In January 2014, the FASB issued ASU No. 2014-04, Receivables - Troubled Debt Restructurings by Creditors (Subtopic 310-40): Reclassification of Residential Real Estate Collateralized Consumer Mortgage Loans upon Foreclosure. The ASU was issued to clarify that an in substance repossession or foreclosure occurs, and a creditor is considered to have received physical possession of residential real estate property collateralizing a consumer mortgage loan, upon either (1) the creditor obtaining legal title to the residential real estate property upon completion of a foreclosure or (2) the borrower conveying all interest in the residential real estate property to the creditor to satisfy that loan through completion of a deed in lieu of foreclosure or through a similar legal agreement. Additionally, the ASU amendments require interim and annual disclosure of both (1) the amount of foreclosed residential real estate property held by the creditor and (2) the recorded investment in consumer mortgage loans collateralized by residential real estate property that are in the process of foreclosure according to local requirements of the applicable jurisdiction. The ASU is effective for annual periods, and interim periods within those annual periods, beginning after December 15, 2014, and the ASU is to be adopted using either a modified retrospective transition method or a prospective transition method. The Company does not believe such ASU will have a material effect on the Company's consolidated financial statements for the interim and annual periods in 2014, other than the additional disclosures required.
Fair Value of Financial Instruments	'
	Determination of Fair Value
	The Company uses fair value measurements to record fair value adjustments to certain assets and liabilities and to determine fair value disclosures. The fair value of a financial instrument is 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. Fair value is best determined based on quoted market prices. However, in many instances, there are no quoted market prices for the Company’s assets and liabilities. In cases where quoted market prices are not available, fair vales are based on estimates using present value or other valuation techniques. Those techniques are significantly affected by the assumptions used, including the discount rate and estimates for future cash flows. Accordingly, the fair value estimates may not be realized in an immediate settlement of the asset or liability.
	Methods and assumptions for valuing the Company’s financial instruments are set forth below. Estimated fair values are calculated based on the value without regard to any premium or discount that may result from concentrations of ownership of a financial instrument, possible tax ramifications or estimated transaction costs.
	Cash and cash equivalents: The carrying amounts of cash and short-term investments approximate fair values.
	Securities: The securities measured at fair value utilizing Level 1 and Level 2 inputs are government-sponsored enterprises, corporate bonds and other obligations, mortgage-backed securities and common stocks. The fair values used by the Company are obtained from an independent pricing service which are not adjusted by management and, represents either quoted market prices for identical securities, quoted market prices for comparable securities or fair values determined by pricing models that consider observable market data, such as interest rate volatilities, credit spreads and prices from market makers and live trading systems and other market indicators, industry and economic events. Municipal securities are valued utilizing Level 3 inputs. Since there is no readily available market pricing and no active market to sell these securities, management believes that the amortized cost of these securities approximates fair value based on their relatively short terms to maturity.
	FHLB stock: The carrying amount of FHLB stock approximates fair value based upon the redemption provisions of the FHLB.
	Loans held for sale: Fair value of loans held for sale are estimated based on commitments on hand from investors or prevailing market prices.
	Loans: Fair values for loans are estimated using discounted cash flow analysis, using market interest rates currently being offered for loans with similar terms to borrowers of similar credit quality. This analysis assumes no prepayment. Fair values for non-performing loans are estimated using discounted cash flow analysis or underlying collateral values, where applicable.
	Mortgage servicing rights: Mortgage servicing rights (“MSR”) are the rights of a mortgage servicer to collect mortgage payments and forward them, after deducting a fee, to the mortgage lender. The fair value of servicing rights is estimated using a present value cash flow model. The fair value of MSR is highly sensitive to changes in assumptions. Changes in prepayment speed assumptions generally have the most significant impact on the fair value of our MSR. Generally, as interest rates decline, mortgage loan prepayments accelerate due to increased refinance activity, which results in a decrease in the fair value of MSR. As interest rates rise, mortgage loan prepayments slow down, which results in an increase in the fair value of MSR. Thus, any measurement of the fair value of our MSR is limited by the conditions existing and the assumptions utilized as of a particular point in time, and those assumptions may not be appropriate if they are applied at a different point in time.
	Deposits and mortgage escrow accounts: The fair values for non-certificate accounts and mortgage escrow accounts are, by definition, equal to the amount payable on demand at the reporting date (i.e., their carrying amounts). Fair values for certificate accounts are estimated using a discounted cash flow calculation that applies market interest rates currently being offered on certificates to a schedule of aggregated expected monthly maturities on time deposits.
	Short-term borrowings: The carrying amount of short-term borrowings approximates fair value.
	Long-term debt: The fair values of the Company's advances are estimated using discounted cash flow analysis based on current market borrowing rates for similar types of borrowing arrangements.
	FAIR VALUE OF ASSETS AND LIABILITIES (Continued)
	Accrued interest: The carrying amounts of accrued interest approximate fair value.
	Off-balance-sheet instruments: Fair values for off-balance-sheet lending commitments are based on fees currently charged to enter into similar agreements, taking into account the remaining terms of the agreements and the counterparties' credit standing. The estimated fair value of off-balance sheet financial instruments at June 30, 2014 and 2013 was not material.
	The Company does not measure any liabilities at fair value on either a recurring or non-recurring basis.

Summary_of_Significant_Account2

Summary of Significant Accounting Policies (Tables)	12 Months Ended
	Jun. 30, 2014
Accounting Policies [Abstract]	'
Schedule of Accumulated Other Comprehensive Income	'
	The components of accumulated other comprehensive income and related tax effects are as follows:
		June 30,
		2014			2013
		(In Thousands)
	Net unrealized gains on available-for-sale securities	$	233		$	541
	Tax effects	(75		)	(195		)
	Net-of-tax amount	$	158		$	346
Schedule of Earnings Per Share	'
	Earnings per common share have been computed based upon the following:
		Years Ended June 30,
		2014			2013			2011
	Net income available to common stock (in thousands)	$	4,515		$	2,974		$	3,016
	Average number of shares issued	8,019,352			7,970,174			7,950,748
	Less: average unallocated ESOP shares	(340,868		)	(383,264		)	(425,660		)
	Less: average treasury stock	(2,371,873		)	(2,142,150		)	(1,631,852		)
	Less: average unvested restricted stock awards	(2,460		)	(29,909		)	(86,259		)
	Average number of basic shares outstanding	5,304,151			5,414,851			5,806,977
	Plus: dilutive unvested restricted stock awards	1,487			20,942			37,545
	Plus: dilutive stock option shares	130,123			112,358			44,069
	Average number of diluted shares outstanding	5,435,761			5,548,151			5,888,591
	Basic earnings per share	$	0.85		$	0.55		$	0.52
	Diluted earnings per share	$	0.83		$	0.54		$	0.51

Investment_SecuritiesTables

Investment Securities(Tables)	12 Months Ended
	Jun. 30, 2014
Investments, Debt and Equity Securities [Abstract]	'
Schedule of Amortized Cost and Estimated Fair Value of Securities Available for Sale	'
	The amortized cost and estimated fair value of the Company's investment securities, with gross unrealized gains and losses, follows:
		June 30, 2014
		Amortized		Gross		Gross			Fair Value
		Cost		Unrealized		Unrealized
				Gains		Losses
		(In Thousands)
	Available for Sale
	Debt securities:
	Corporate bonds	$	3,026	$	60	$	—		$	3,086
	Residential mortgage-backed securities:
	Agency	128,938		1,629		(1,494		)	129,073
	Non-agency	1,688		15		(5		)	1,698
	Total debt securities	133,652		1,704		(1,499		)	133,857
	Marketable equity securities	51		28		—			79
	Total securities available for sale	$	133,703	$	1,732	$	(1,499	)	$	133,936
	Held to Maturity
	Municipal bonds	$	9,302	$	—	$	—		$	9,302
	Total securities held to maturity	$	9,302	$	—	$	—		$	9,302
		June 30, 2013
		Amortized		Gross		Gross			Fair Value
		Cost		Unrealized		Unrealized
				Gains		Losses
		(In Thousands)
	Available for Sale
	Debt securities:
	Municipal bonds	$	395	$	—	$	—		$	395
	Corporate bonds	3,036		40		—			3,076
	Residential mortgage-backed securities:
	Agency	132,498		1,916		(1,426		)	132,988
	Non-agency	2,209		10		(16		)	2,203
	Total debt securities	138,138		1,966		(1,442		)	138,662
	Marketable equity securities	51		17		—			68
	Total securities available for sale	$	138,189	$	1,983	$	(1,442	)	$	138,730
Schedule of Debt Securities by Contractual Maturity	'
	The amortized cost and estimated fair value of debt securities by contractual maturity at June 30, 2014 are set forth below. Expected maturities will differ from contractual maturities because the issuer may have the right to call or prepay obligations with or without call or prepayment penalties.
		Securities Available for Sale				Securities Held to Maturity
		Amortized		Fair Value		Amortized			Fair Value
		Cost				Cost
		(In Thousands)
	Within 1 year	$	—	$	—	$	6,813		$	6,813
	After 1 year but within 5 years	3,026		3,086		2,489			2,489
	Total bonds, obligations, and municipals	3,026		3,086		9,302			9,302
	Residential mortgage-backed securities:
	Agency	128,938		129,073		—			—
	Non-agency	1,688		1,698		—			—
	Total debt securities	$	133,652	$	133,857	$	9,302		$	9,302
Schedule of Securities with Gross Unrealized Losses	'
	Information pertaining to securities with gross unrealized losses at June 30, 2014 and 2013, aggregated by investment category and length of time that individual securities have been in a continuous loss position, follows:
		Less Than Twelve Months				Over Twelve Months					Total
		Gross		Fair Value		Gross			Fair Value		Gross		Fair Value
		Unrealized				Unrealized					Unrealized
		Losses				Losses					Losses
		(In Thousands)
	June 30, 2014:
	Residential mortgage-backed securities:
	Agency	$	38	$	7,357	$	1,456		$	51,094	$	1,494	$	58,451
	Non-agency	1		143		4			234		5		377
		$	39	$	7,500	$	1,460		$	51,328	$	1,499	$	58,828
	June 30, 2013:
	Residential mortgage-backed securities:
	Agency	$	1,337	$	68,456	$	89		$	6,142	$	1,426	$	74,598
	Non-agency	5		330		11			1,047		16		1,377
		$	1,342	$	68,786	$	100		$	7,189	$	1,442	$	75,975

Loan_Servicing_Tables

Loan Servicing (Tables)	12 Months Ended
	Jun. 30, 2014
Transfers and Servicing [Abstract]	'
Schedule of Servicing Assets at Fair Value	'
	The changes in servicing assets measured using fair value are as follows:
		Years Ended June 30,
		2014		2013
		(In Thousands)
	Fair value at the beginning of year	$	654	$	445
	Capitalized servicing assets	97		48
	Changes in fair value	41		161
	Fair value at end of year	$	792	$	654

Loans_Tables

Loans (Tables)	12 Months Ended
	Jun. 30, 2014
Receivables [Abstract]	'
Schedule of Loan Balances	'
	A summary of the balances of loans follows:
		June 30,
		2014			2013
		(In Thousands)
	Mortgage loans on real estate:
	One- to four-family	$	107,498		$	107,617
	Commercial	200,750			167,381
	Home equity:
	First lien	36,299			36,093
	Second lien	39,845			42,328
	Construction:
	Residential	3,807			3,736
	Commercial	36,189			21,237
	Total mortgage loans on real estate	424,388			378,392
	Other loans:
	Commercial	54,756			43,566
	Consumer:
	Manufactured homes	21,766			21,716
	Automobile and other secured loans	7,172			7,682
	Other	2,566			1,679
	Total other loans	86,260			74,643
	Total loans	510,648			453,035
	Net deferred loan costs	2,638			2,726
	Allowance for loan losses	(5,651		)	(5,414		)
	Total loans, net	$	507,635		$	450,347
Schedule of Loans by Risk Rating	'
	The following tables present the Company’s loans by risk rating at June 30, 2014 and 2013:
	June 30, 2014
			One- to Four-Family			Commercial			Home Equity			Home Equity			Residential			Commercial
						Real Estate			First Lien			Second Lien			Construction			Construction
			(In Thousands)
	Loans rated 1-5		$	104,221		$	184,317		$	36,299		$	39,688		$	3,807		$	36,189
	Loans rated 6		523			12,447			—			7			—			—
	Loans rated 7		2,608			3,986			—			150			—			—
	Loans rated 8		146			—			—			—			—			—
	Loans rated 9		—			—			—			—			—			—
			$	107,498		$	200,750		$	36,299		$	39,845		$	3,807		$	36,189
			Commercial			Manufactured			Automobile and Other			Other Consumer			Total
						Homes			Secured Loans
			(In Thousands)
	Loans rated 1-5		$	49,874		$	21,342		$	7,172		$	2,564		$	485,473
	Loans rated 6		533			160			—			1			13,671
	Loans rated 7		4,349			59			—			1			11,153
	Loans rated 8		—			205			—			—			351
	Loans rated 9		—			—			—			—			—
			$	54,756		$	21,766		$	7,172		$	2,566		$	510,648
	LOANS (Continued)
	June 30, 2013
			One- to Four-Family			Commercial			Home Equity			Home Equity			Residential			Commercial
						Real Estate			First Lien			Second Lien			Construction			Construction
			(In Thousands)
	Loans rated 1-5		$	105,529		$	153,513		$	36,093		$	41,963		$	3,736		$	21,237
	Loans rated 6		835			7,624			—			—			—			—
	Loans rated 7		686			6,244			—			115			—			—
	Loans rated 8		567			—			—			250			—			—
	Loans rated 9		—			—			—			—			—			—
			$	107,617		$	167,381		$	36,093		$	42,328		$	3,736		$	21,237
			Commercial			Manufactured			Automobile and Other			Other Consumer			Total
						Homes			Secured Loans
			(In Thousands)
	Loans rated 1-5		$	36,827		$	21,398		$	7,682		$	1,678		$	429,656
	Loans rated 6		994			146			—			—			9,599
	Loans rated 7		5,745			36			—			1			12,827
	Loans rated 8		—			136			—			—			953
	Loans rated 9		—			—			—			—			—
			$	43,566		$	21,716		$	7,682		$	1,679		$	453,035
Schedule of Past Due and Non-Accrual Loans	'
	The following are summaries of past due and non-accrual loans:
			30-59 Days			60-89 Days			90 Days			Total			Loans on
			Past Due			Past Due			or Greater			Past Due			Non-accrual
									Past Due
	June 30, 2014		(In Thousands)
	Mortgage loans on real estate:
	One- to four-family		$	607		$	236		$	2,437		$	3,280		$	2,755
	Commercial		583			—			—			583			534
	Home equity:
	First lien		—			—			—			—			—
	Second lien		159			—			111			270			150
	Commercial		—			—			1,500			1,500			1,500
	Consumer:
	Manufactured homes		304			27			240			571			240
	Automobile and other		—			—			—			—			—
	secured loans
	Other		12			1			—			13			—
	Total		$	1,665		$	264		$	4,288		$	6,217		$	5,179
	June 30, 2013
	Mortgage loans on real estate:
	One- to four-family		$	642		$	—		$	1,013		$	1,655		$	1,405
	Commercial		148			—			—			148			148
	Home equity:
	First lien		—			—			—			—			—
	Second lien		180			29			268			477			335
	Commercial		16			75			1,984			2,075			1,988
	Consumer:
	Manufactured homes		115			—			103			218			103
	Automobile and other		18			—			—			18			—
	secured loans
	Other		1			—			—			1			—
	Total		$	1,120		$	104		$	3,368		$	4,592		$	3,979
Schedule of Impaired Loans by Category	'
	The following are summaries of impaired loans:
		June 30, 2014									June 30, 2013
		Recorded			Unpaid			Related			Recorded			Unpaid			Related
		Investment			Principal			Allowance			Investment			Principal			Allowance
					Balance									Balance
		(In Thousands)
	Impaired loans without a valuation allowance:
	Mortgage loans on real estate:
	One- to four-family	$	2,755		$	2,814		$	—		$	1,405		$	1,676		$	—
	Commercial	3,147			3,147			—			5,962			5,962			—
	Home equity:
	Second lien	150			170			—			335			335			—
	Other loans:
	Commercial	2,952			2,952			—			4,408			4,415			—
	Manufactured homes	239			275			—			103			103			—
	Total	9,243			9,358			—			12,213			12,491			—
	Impaired loans with a valuation allowance:
	Mortgage loans on real estate:
	Commercial	537			537			11			2,208			2,208			32
	Other loans:
	Commercial	—			—			—			533			533			—
	Total	537			537			11			2,741			2,741			32
	Total impaired loans	$	9,780		$	9,895		$	11		$	14,954		$	15,232		$	32
Schedule of Impaired Loans, Average Recorded Investment and Interest Income Recognized	'
	At June 30, 2014, the Company has no impaired loans with additional funds committed to be advanced.  Information pertaining to impaired loans for the years ended June 30, 2014, 2013 and 2012 are as follows:
		Year Ended June 30, 2014									Year Ended June 30, 2013									Year Ended June 30, 2012
		Average			Interest Income						Average			Interest Income						Average			Interest Income
		Recorded			Recognized			Recognized			Recorded			Recognized						Recorded			Recognized			Recognized
		Investment						on a Cash			Investment on						Recognized			Investment						on a Cash
		on Impaired						Basis			Impaired						on a Cash			on Impaired						Basis
		Loans									Loans						Basis			Loans
		(In Thousands)
	Mortgage loans on real estate:
	One- to four-family	$	1,682		$	36		$	33		$	1,506		$	69		$	69		$	1,789		$	89		$	89
	Commercial	5,905			252			17			10,795			682			682			10,482			701			685
	Home equity:
	First lien	—			—			—			34			2			2			—			—			—
	Second lien	214			5			5			238			11			7			253			4			4
	Construction:
	Commercial	—			—			—			—			—			—			232			15			15
	Commercial	4,199			131			6			4,294			138			138			4,606			226			226
	Consumer:
	Manufactured homes	112			1			1			131			11			—			104			—			1
	Total loans	$	12,112		$	425		$	62		$	16,998		$	913		$	898		$	17,466		$	1,035		$	1,020
Schedule of Allowance for Loan Losses	'
	Information pertaining to activity in the allowance for loan losses for the years ended June 30, 2014, 2013 and 2012 is as follows:
		One- to Four-Family			Commercial			Home			Home			Residential			Commercial			Commercial			Manufactured			Automobile and			Other			Total
					Real Estate			Equity			Equity			Construction			Construction						Homes			Other Secured			Consumer
								First Lien			Second															Loans
											Lien
		(In Thousands)
	Balance at June 30, 2011	$	893		$	2,922		$	196		$	321		$	33		$	32		$	1,020		$	—		$	—		$	56		$	5,473
	Charge-offs	(391		)	(166		)	(69		)	—			—			—			(213		)	—			—			(20		)	(859		)
	Recoveries	71			16			5			—			—			—			11			—			—			6			109
	Provision (credit)	292			(412		)	74			(41		)	5			(12		)	151			375			25			(32		)	425
	Balance at June 30, 2012	865			2,360			206			280			38			20			969			375			25			10			5,148
	Charge-offs	(185		)	(207		)	—			(70		)	—			—			—			—			(53		)	(29		)	(544		)
	Recoveries	8			—			4			—			—			—			104			—			12			7			135
	Provision (credit)	74			62			23			92			(5		)	295			(8		)	57			50			35			675
	Balance at June 30, 2013	762			2,215			233			302			33			315			1,065			432			34			23			5,414
	Charge-offs	(147		)	(22		)	—			(19		)	—			—			—			(189		)	(5		)	(5		)	(387		)
	Recoveries	—			—			5			—			—			—			50			—			18			1			74
	Provision (credit)	82			95			(34		)	(15		)	(3		)	157			101			174			(17		)	10			550
	Balance at June 30, 2014	$	697		$	2,288		$	204		$	268		$	30		$	472		$	1,216		$	417		$	30		$	29		$	5,651
	LOANS (Concluded)
	Information pertaining to the allowance for loan losses and recorded investment in loans at June 30, 2014, and 2013 are as follows:
		At June 30, 2014
		One- to Four-Family			Commercial Real Estate			Home			Home			Residential Construction			Commercial Construction			Commercial			Manufactured Homes			Automobile			Other Consumer			Total
								Equity			Equity															and Other Secured
								First			Second															Loans
								Lien			Lien
	Allowance:	(In Thousands)
	Impaired loans	$	—		$	11		$	—		$	—		$	—		$	—		$	—		$	—		$	—		$	—		$	11
	Non-impaired loans	697			2,277			204			268			30			472			1,216			417			30			29			5,640
	Total allowance for loan losses	$	697		$	2,288		$	204		$	268		$	30		$	472		$	1,216		$	417		$	30		$	29		$	5,651
	Loans:
	Impaired loans	$	2,755		$	3,684		$	—		$	150		$	—		$	—		$	2,952		$	239		$	—		$	—		$	9,780
	Non-impaired loans	104,743			197,066			36,299			39,695			3,807			36,189			51,804			21,527			7,172			2,566			500,868
	Total loans	$	107,498		$	200,750		$	36,299		$	39,845		$	3,807		$	36,189		$	54,756		$	21,766		$	7,172		$	2,566		$	510,648
		At June 30, 2013
		One- to Four-Family			Commercial Real Estate			Home			Home			Residential Construction			Commercial Construction			Commercial			Manufactured Homes			Automobile			Other Consumer			Total
								Equity			Equity															and Other Secured
								First			Second															Loans
								Lien			Lien
	Allowance:	(In Thousands)
	Impaired loans	$	—		$	32		$	—		$	—		$	—		$	—		$	—		$	—		$	—		$	—		$	32
	Non-impaired loans	762			2,183			233			302			33			315			1,065			432			34			23			5,382
	Total allowance for loan losses	$	762		$	2,215		$	233		$	302		$	33		$	315		$	1,065		$	432		$	34		$	23		$	5,414
	Loans:
	Impaired loans	$	1,405		$	8,170		$	—		$	335		$	—		$	—		$	4,941		$	103		$	—		$	—		$	14,954
	Non-impaired loans	106,212			159,211			36,093			41,993			3,736			21,237			38,625			21,613			7,682			1,679			438,081
	Total loans	$	107,617		$	167,381		$	36,093		$	42,328		$	3,736		$	21,237		$	43,566		$	21,716		$	7,682		$	1,679		$	453,035

Premises_and_Equipment_Tables

Premises and Equipment (Tables)	12 Months Ended
	Jun. 30, 2014
Property, Plant and Equipment [Abstract]	'
Schedule of Cost and Depreciation of Premises and Equipment	'
	A summary of the cost and accumulated depreciation and amortization is as follows:
		June 30,
		2014			2013			Estimated
								Useful Lives
		(In Thousands)
	Premises:
	Land	$	763		$	763
	Buildings and improvements	5,693			5,616			5 - 39 Years
	Leasehold improvements	2,902			2,811			5 - 10 Years
	Equipment	3,890			3,723			3 - 10 Years
		13,248			12,913
	Accumulated depreciation and amortization	(8,580		)	(7,903		)
		$	4,668		$	5,010

Deposits_Tables

Deposits (Tables)	12 Months Ended
	Jun. 30, 2014
Banking and Thrift [Abstract]	'
Schedule of Deposit Balances by Type	'
	A summary of deposit balances by type is as follows:
		At June 30,
		2014		2013
		(In Thousands)
	Demand	$	84,224	$	74,081
	NOW	42,376		46,220
	Regular and other savings	102,909		104,893
	Money market deposits	99,505		84,277
	Total non-certificate accounts	329,014		309,471
	Term certificates less than $100,000	60,027		67,398
	Term certificates of $100,000 and greater	102,691		97,929
	Total certificate accounts	162,718		165,327
	Total deposits	$	491,732	$	474,798
Schedule of Time Deposits by Maturity	'
	At June 30, 2014, the scheduled maturities of time deposits (in thousands) are as follows:
	Year Ending June 30,
	2015	$	68,184
	2016	32,233
	2017	31,646
	2018	13,895
	2019	16,760
		$	162,718

LongTerm_Debt_Tables

Long-Term Debt (Tables)	12 Months Ended
	Jun. 30, 2014
Debt Disclosure [Abstract]	'
Schedule of Federal Home Loan Bank Advances	'
	A summary of outstanding long-term fixed rate advances from the FHLB at June 30, 2014 and 2013 is as follows:
		Amount				Weighted Average Rate
		2014		2013		2014		2013
		(In Thousands)
	Advances maturing
	in the years ending June 30,
	2014	$	—	$	3,754	—	%	1.45	%
	*2015	13,427		6,053		0.53	%	0.85	%
	2016	35,800		28,800		1.3	%	1.47	%
	2017	26,000		25,000		1.92	%	1.95	%
	2018	18,885		18,885		2.09	%	2.09	%
	*2021	8,992		—		1.94	%	—	%
	*2024	9,342		—		2.75	%	—	%
	Total FHLB advances	$	112,446	$	82,492	1.66	%	1.71	%
	* For all starred items at June 30, 2014, includes amortizing advances aggregating $19.6 million requiring combined monthly principal and interest payments of $360,000.

Income_Taxes_Tables

Income Taxes (Tables)	12 Months Ended
	Jun. 30, 2014
Income Tax Disclosure [Abstract]	'
Schedule of Tax Provision by Jurisdiction Category and Classification	'
	Allocation of the federal and state income taxes between current and deferred portions is as follows:
		Years Ended June 30,
		2014				2013				2012
		(In Thousands)
	Current tax provision:
	Federal	$	1,672			$	1,564			$	452
	State	350				392				35
		2,022				1,956				487
	Deferred tax provision (benefit):
	Federal	398				610				1,019
	State	124				(54		)		252
		522				556				1,271
	Change in valuation allowance	—				(735		)		25
		522				(179		)		1,296
	Total tax provision	$	2,544			$	1,777			$	1,783
Schedule of Effective Income Tax Rate Reconciliation	'
	The reasons for the differences between the statutory federal income tax rate and the effective tax rates are summarized as follows:
		Years Ended June 30,
		2014			2013			2012
	Statutory tax rate	34	%		34	%		34	%
	Increase (decrease) resulting from:
	State taxes, net of federal tax benefit	4.4			4.7			3.9
	Tax exempt income	(0.8	)		(0.6	)		(0.6	)
	Bank-owned life insurance	(2.4	)		(3.8	)		(3.2	)
	Change in valuation allowance assumptions, net of carryover expiration	—			0.7			0.5
	Stock options	(0.2	)		1.3			1.8
	Other, net	1			1.1			0.8
	Effective income tax rate	36	%		37.4	%		37.2	%
Schedule of Deferred Tax Assets and Liabilities	'
	The components of the net deferred tax asset are as follows:
		June 30,
		2014				2013
		(In Thousands)
	Deferred tax assets:
	Federal	$	3,923			$	4,297
	State	1,132				1,257
		5,055				5,554
	Deferred tax liabilities:
	Federal	(689		)		(786		)
	State	(184		)		(184		)
		(873		)		(970		)
	Net deferred tax asset	$	4,182			$	4,584
Schedule of Components of Deferred Taxes	'
	The tax effects of each item that give rise to deferred taxes are as follows:
		June 30,
		2014				2013
		(In Thousands)
	Non-accrued interest income	$	158			$	64
	Net unrealized gain on securities available for sale	(75		)		(195		)
	Depreciation	439				547
	Mortgage servicing rights	(316		)		(261		)
	Allowance for loan losses	2,345				2,261
	Employee benefit plans	1,771				2,234
	Other-than-temporary impairment of securities	—				91
	Other, net	(140		)		(157		)
	Net deferred tax asset	$	4,182			$	4,584

Commitments_and_Contingencies_

Commitments and Contingencies (Tables)	12 Months Ended
	Jun. 30, 2014
Commitments and Contingencies Disclosure [Abstract]	'
Schedule of Off-balance-sheet Credit Risks	'
	A summary of financial instruments outstanding whose contract amounts represent credit risk is as follows:
		June 30,
		2014		2013
		(In Thousands)
	Commitments to grant loans	$	20,380	$	63,607
	Unadvanced funds on home equity lines of credit	35,718		34,498
	Unadvanced funds on personal lines of credit	1,828		1,852
	Unadvanced funds on commercial lines of credit	37,789		29,882
	Unadvanced funds on construction loans	37,889		25,164
	Standby letters of credit	500		548
	Total loan commitments	$	134,104	$	155,551

Minimum_Regulatory_Capital_Req1

Minimum Regulatory Capital Requirements (Tables)	12 Months Ended
	Jun. 30, 2014
Banking and Thrift [Abstract]	'
Schedule of Regulatory Capital Amounts and Ratios	'
	The Company's and the Bank's actual and minimum required capital amounts and ratios are as follows:
												Minimum
												To Be Well
								Minimum				Capitalized Under
								For Capital				Prompt Corrective
		Actual						Adequacy Purposes				Action Provisions
		Amount			Ratio			Amount		Ratio		Amount		Ratio
		(Dollars in Thousands)
	As of June 30, 2014
	Total capital (to risk weighted assets):
	Consolidated	$	92,586		18.3	%		$	40,547	8	%	N/A		N/A
	Bank	80,715			15.9			40,570		8		$	50,712	10	%
	Tier 1 capital (to risk weighted assets):
	Consolidated	86,922			17.2			20,273		4		N/A		N/A
	Bank	75,051			14.8			20,285		4		30,427		6
	Tier 1 capital (to average assets):
	Consolidated	86,922			12.2			28,420		4		N/A		N/A
	Bank	75,051			10.6			28,297		4		35,372		5
	As of June 30, 2013
	Total capital (to risk weighted assets):
	Consolidated	$	88,670		19.1	%		$	37,077	8	%	N/A		N/A
	Bank	80,350			17.5			36,788		8		$	45,985	10	%
	Tier 1 capital (to risk weighted assets):
	Consolidated	83,248			18			18,538		4		N/A		N/A
	Bank	74,928			16.3			18,394		4		27,591		6
	Tier 1 capital (to average assets):
	Consolidated	83,248			12.7			26,240		4		N/A		N/A
	Bank	74,928			11.6			25,827		4		32,284		5
Schedule of Reconciliation of Stockholders' Equity to Regulatory Capital	'
	A reconciliation of the Company’s year-end total stockholders’ equity to the Bank’s regulatory capital is as follows:
		June 30, 2014
		Consolidated			Bank
		(In Thousands)
	Total stockholders' equity per consolidated financial statements	$	87,159		$	87,159
	Adjustments for Tier 1 capital:
	Holding company equity adjustment	—			(11,871		)
	Accumulated gains on securities available for sale, net of tax	(158		)	(158		)
	Mortgage servicing rights	(79		)	(79		)
	Total Tier 1 capital	86,922			75,051
	Adjustments for total capital:
	Unrealized gains on securities available for sale	13			13
	Allowance for loan losses	5,651			5,651
	Total capital per regulatory reporting	$	92,586		$	80,715
		June 30, 2013
		Consolidated			Bank
		(In Thousands)
	Total stockholders' equity per consolidated financial statements	$	83,659		$	83,659
	Adjustments for Tier 1 capital:
	Holding company equity adjustment	—			(8,320		)
	Accumulated gains on securities available for sale, net of tax	(346		)	(346		)
	Mortgage servicing rights	(65		)	(65		)
	Total Tier 1 capital	83,248			74,928
	Adjustments for total capital:
	Unrealized gains on securities available for sale	8			8
	Allowance for loan losses	5,414			5,414
	Total capital per regulatory reporting	$	88,670		$	80,350

Employee_Benefit_Plans_Tables

Employee Benefit Plans (Tables)	12 Months Ended
	Jun. 30, 2014
Compensation and Retirement Disclosure [Abstract]	'
Schedule of Shares Held by ESOP by Status	'
	Shares held by the ESOP include the following:
		June 30,
		2014	2013	2012
	Allocated	243,956	232,721	199,907
	Committed to be allocated	21,200	21,200	21,200
	Unallocated	317,998	360,397	402,796
		583,154	614,318	623,903

Equity_Incentive_Plan_Tables

Equity Incentive Plan (Tables)	12 Months Ended
	Jun. 30, 2014
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]	'
Schedule of Valuation Assumptions for Stock Options	'
	The fair value of each option granted is estimated on the date of grant using the Black-Scholes option-pricing model with the following weighted average assumptions for options granted during the years ended June 30, 2014, 2013 and 2012:
		Years Ended June 30,
		2014				2013				2012
	Fair value	$	4.45			$	3.34			$	3.44
	Expected dividends	1.49		%		1.26		%		0.94		%
	Expected term (years)	6.5				6.5				6.25
	Expected volatility	26.45		%		27.97		%		27.97		%
	Risk-free interest rate	2.84		%		1.75		%		2.19		%
Schedule of Stock Options Outstanding and Exercisable	'
	A summary of options under the Plan for the year ended June 30, 2014 is presented below:
		Shares			Weighted				Weighted Average
					Average				Remaining
					Exercise Price				Contractual Term
					per Share				(in Years)
	Outstanding at June 30, 2013	555,183			$	11.02
	Granted	10,000			16.49
	Exercised	(126,500	)		10.86
	Outstanding at June 30, 2014	438,683			$	11.2			4.4
	Exercisable at June 30, 2014	393,183			$	10.95			3.9
Schedule of Nonvested Stock Awards	'
	A summary of the status of the Company’s stock awards is presented below:
		Nonvested
		Shares
	Balance at June 30, 2013	3,000
	Granted	—
	Vested	(600	)
	Balance at June 30, 2014	2,400

Fair_Value_of_Financial_Instru1

Fair Value of Financial Instruments (Tables)	12 Months Ended
	Jun. 30, 2014
Fair Value Disclosures [Abstract]	'
Schedule of Financial Assets Measured at Fair Value on Recurring Basis	'
	The following table presents the balances of assets measured at fair value on a recurring basis as of June 30, 2014 and 2013:
			Level 1			Level 2		Level 3		Total
	June 30, 2014		(In Thousands)
	Securities available for sale:
	Debt securities		$	—		$	133,857	$	—	$	133,857
	Marketable equity securities		79			—		—		79
	Mortgage servicing rights		—			—		792		792
	Total		$	79		$	133,857	$	792	$	134,728
	June 30, 2013
	Securities available for sale:
	Debt securities		$	—		$	138,662	$	—	$	138,662
	Marketable equity securities		68			—		—		68
	Mortgage servicing rights		—			—		654		654
	Total		$	68		$	138,662	$	654	$	139,384
Schedule of Level 3 Assets Measured at Fair Value on Recurring Basis	'
	The table below presents, for the years ended June 30, 2014 and 2013, the changes in Level 3 assets that are measured at fair value on a recurring basis:
		Mortgage
		Servicing
		Rights
		(In Thousands)
	Balance as of July 1, 2012	$	445
	Total realized and unrealized gains included in net income	161
	Capitalized servicing assets	48
	Balance as of June 30, 2013	654
	Total realized and unrealized gains included in net income	41
	Capitalized servicing assets	97
	Balance as of June 30, 2014	$	792
Schedule of Financial Assets Measured at Fair Value on Nonrecurring Basis	'
	The following table summarizes the carrying value of the related individual assets as of June 30, 2014 and 2013 all classified in Level 3 fair value hierarchy:
		June 30,
		2014			2013
		(In Thousands)
	Impaired loans	$	461		$	292
	Other real estate owned	309			1,221
	Total	$	770		$	1,513
Schedule of Carrying Amounts and Estimated Fair Values of Financial Instruments	'
	The carrying amounts and related estimated fair values of the Company's financial instruments are as follows. Certain financial instruments and all non-financial instruments are exempt from disclosure requirements. Accordingly, the aggregate fair value amounts presented herein may not necessarily represent the underlying fair value of the Company.
	FAIR VALUE OF ASSETS AND LIABILITIES (Concluded)
			Carrying			Fair Value
	June 30, 2014		Amount			Level 1		Level 2		Level 3		Total
			(In Thousands)
	Financial assets:
	Cash and cash equivalents		$	12,667		$	12,667	$	—	$	—	$	12,667
	Securities available for sale		133,936			79		133,857		—		133,936
	Securities held to maturity		9,302			—		—		9,302		9,302
	Federal Home Loan Bank stock		6,648			—		—		6,648		6,648
	Loans held for sale		330			—		330		—		330
	Loans, net		507,635			—		—		513,765		513,765
	Accrued interest receivable		1,688			—		—		1,688		1,688
	Mortgage servicing rights (1)		792			—		—		792		792
	Financial liabilities:
	Deposits		491,732			—		—		493,500		493,500
	Short-term borrowings		4,000			—		4,000		—		4,000
	Long-term debt		112,446			—		113,823		—		113,823
	Mortgagors' escrow accounts		1,184			—		—		1,184		1,184
	(1) Included in other assets.
	June 30, 2013
	Financial assets:
	Cash and cash equivalents		$	25,618		$	25,618	$	—	$	—	$	25,618
	Securities available for sale		138,730			68		138,662		—		138,730
	Federal Home Loan Bank stock		5,092			—		—		5,092		5,092
	Loans held for sale		1,274			—		1,274		—		1,274
	Loans, net		450,347			—		—		459,018		459,018
	Accrued interest receivable		1,636			—		—		1,636		1,636
	Mortgage servicing rights (1)		654			—		—		654		654
	Financial liabilities:
	Deposits		474,798			—		—		477,059		477,059
	Short-term borrowings		4,500			—		4,500		—		4,500
	Long-term debt		82,492			—		82,527		—		82,527
	Mortgagors' escrow accounts		1,100			—		—		1,100		1,100
	(1) Included in other assets.

Parent_Company_Only_Condensed_1

Parent Company Only Condensed Financial Statements(Tables)	12 Months Ended
	Jun. 30, 2014
Condensed Financial Information of Parent Company Only Disclosure [Abstract]	'
Schedule of Condensed Financial Statements	'
	The condensed financial information pertaining only to the parent company, Hampden Bancorp, Inc., is as follows:
	BALANCE SHEETS
		June 30,
		2014			2013
		(In Thousands)
	Assets
	Cash on hand	$	4,920		$	967
	Short-term investments	—			65
	Cash and cash equivalents	4,920			1,032
	Investment in Hampden Bank	75,289			75,339
	Investment in Hampden LS, Inc.	1,993			1,762
	Deferred tax asset	700			1,221
	Other assets	4,257			4,305
		$	87,159		$	83,659
	Liabilities and Stockholders' Equity
	Stockholders' equity	$	87,159		$	83,659
		$	87,159		$	83,659
	STATEMENTS OF OPERATIONS
		Years Ended June 30,
		2014			2013			2012
		(In Thousands)
	Income:
	Interest on securities	$	—		$	—		$	30
	Interest on cash and short-term investments	—			3			2
	Non-interest income	—			—			18
	Total income	—			3			50
	Operating expenses	951			1,343			1,920
	Loss before income taxes and equity in undistributed net income of subsidiaries	(951		)	(1,340		)	(1,870		)
	Income tax benefit	(250		)	(195		)	(321		)
	Loss before equity in undistributed net income of subsidiaries	(701		)	(1,145		)	(1,549		)
	Equity in undistributed net income of Hampden Bank	4,986			3,878			4,320
	Equity in undistributed net income of Hampden LS, Inc.	230			241			245
	Net income	$	4,515		$	2,974		$	3,016
	PARENT COMPANY ONLY CONDENSED FINANCIAL STATEMENTS (Concluded)
	STATEMENTS OF CASH FLOWS
		Years Ended June 30,
		2014			2013			2012
		(In Thousands)
	Cash flows from operating activities:
	Net income	$	4,515		$	2,974		$	3,016
	Adjustments to reconcile net income to net cash provided by operating activities:
	Dividends in excess of earnings of subsidiaries	5,600			4,500			3,000
	Equity in undistributed net income of Hampden Bank	(4,986		)	(3,878		)	(4,320		)
	Equity in undistributed net income of Hampden LS, Inc.	(230		)	(241		)	(245		)
	Stock-based compensation	46			503			926
	Deferred tax provision (benefit)	521			(69		)	(30		)
	Net change in:
	Accrued interest receivable	—			—			9
	Other assets	(429		)	(1,822		)	16
	Accrued expenses	477			1,508			1,168
	Net cash provided by operating activities	5,514			3,475			3,540
	Cash flows from investing activities:
	Activities in available-for-sale securities:
	Sales	—			15			1,309
	Maturities	—			—			1,933
	Net cash provided by investing activities	—			15			3,242
	Cash flows from financing activities:
	Payment of loan from Hampden LS, Inc.	752			752			752
	Common stock repurchased	(454		)	(5,271		)	(10,410		)
	Payment of dividends on common stock	(1,268		)	(997		)	(820		)
	Other, net	(656		)	(377		)	(742		)
	Net cash used by financing activities	(1,626		)	(5,893		)	(11,220		)
	Net increase (decrease) in cash and cash equivalents	3,888			(2,403		)	(4,438		)
Cash and cash equivalents at beginning of year	1,032			3,435			7,873
Cash and cash equivalents at end of year	$	4,920		$	1,032		$	3,435

Quarterly_Data_Unaudited_Table

Quarterly Data (Unaudited) (Tables)	12 Months Ended
	Jun. 30, 2014
Quarterly Financial Information Disclosure [Abstract]	'
Schedule of Quarterly Financial Information	'
	Quarterly results of operations for the years ended June 30, 2014 and 2013 were as follows:
		2014								2013
		Fourth		Third		Second		First		Fourth		Third		Second		First
		Quarter		Quarter		Quarter		Quarter		Quarter		Quarter		Quarter		Quarter
		(Dollars In Thousands, except per share amounts)
	Interest and dividend income	$	6,501	$	6,434	$	6,428	$	6,149	$	6,094	$	5,924	$	6,121	$	6,209
	Interest expense	1,286		1,292		1,331		1,261		1,317		1,346		1,414		1,408
	Net interest income	5,215		5,142		5,097		4,888		4,777		4,578		4,707		4,801
	Provision for loan losses	150		150		150		100		350		100		175		50
	Non-interest income	837		788		911		1,103		986		1,177		1,072		966
	Non-interest expense	3,922		4,184		4,260		4,005		4,448		4,346		4,381		4,464
	Provision for income taxes	714		575		577		679		347		485		453		492
	Net income	$	1,266	$	1,021	$	1,021	$	1,207	$	618	$	824	$	770	$	761
	Basic earnings per share	$	0.24	$	0.19	$	0.19	$	0.23	$	0.12	$	0.15	$	0.14	$	0.14
	Diluted earnings per share	$	0.23	$	0.19	$	0.19	$	0.22	$	0.11	$	0.15	$	0.14	$	0.14
	Weighted average shares outstanding:
	Basic	5,327,928		5,313,484		5,300,289		5,274,900		5,372,849		5,389,400		5,401,349		5,495,803
	Diluted	5,458,803		5,439,177		5,443,078		5,401,982		5,519,703		5,560,481		5,527,472		5,584,946

Summary_of_Significant_Account3

Summary of Significant Accounting Policies - Narrative (Detail) (USD $)	12 Months Ended
	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2012
	Location
Significant Accounting Policies [Line Items]	'	'	'
Number of office locations (in locations)	10	'	'
Mortgage and commercial loans, number of days past due when accrual of interest is discontinued	'90 days	'	'
Other personal loans, time period past due when loan is charged off	'180 days	'	'
Period of acceptable repayment after which loans are reclassified to accrual status	'6 months	'	'
Period during which performance must occur to return troubled debt to accrual status	'6 months	'	'
Interest and penalties recorded as part of income tax expense	$0	$0	$0
One- to four-family	'	'	'
Significant Accounting Policies [Line Items]	'	'	'
Maximum loan-to-value ratio at time of origination	80.00%	'	'
Home equity:	'	'	'
Significant Accounting Policies [Line Items]	'	'	'
Maximum loan-to-value ratio at time of origination	85.00%	'	'
Home equity: | Minimum	'	'	'
Significant Accounting Policies [Line Items]	'	'	'
Contractual time period of availability for lines-of-credit to be drawn upon	'10 years	'	'
Lines-of-credit converted to term loans, amortization period	'5 years	'	'
Home equity: | Maximum	'	'	'
Significant Accounting Policies [Line Items]	'	'	'
Contractual time period of availability for lines-of-credit to be drawn upon	'20 years	'	'
Lines-of-credit converted to term loans, amortization period	'10 years	'	'
Federal Home Loan Bank of Boston	'	'	'
Significant Accounting Policies [Line Items]	'	'	'
Federal Home Loan Bank of Boston stock, par value per share (USD per share)	$100	'	'
Percentage of residential loans as one of two thresholds for calculating the amount of stock of FHLB the entity is required to acquire and hold	1.00%	'	'
Percentage of advances from FHLB as one of two thresholds for calculating the amount of stock of FHLB the entity is required to acquire and hold	5.00%	'	'
Hampden Bank	'	'	'
Significant Accounting Policies [Line Items]	'	'	'
Number of subsidiaries owned by Hampden Bank (in entities)	3	'	'

Summary_of_Significant_Account4

Summary of Significant Accounting Policies - Schedule of Accumulated Other Comprehensive Income (Detail) (USD $)	Jun. 30, 2014	Jun. 30, 2013
In Thousands, unless otherwise specified
Accounting Policies [Abstract]	'	'
Net unrealized gains on available-for-sale securities	$233	$541
Tax effects	-75	-195
Net-of-tax amount	$158	$346

Summary_of_Significant_Account5

Summary of Significant Accounting Policies - Schedule of Earnings Per Share (Detail) (USD $)	3 Months Ended								12 Months Ended
In Thousands, except Share data, unless otherwise specified	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2012	Sep. 30, 2012	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2012
Earnings Per Share, Diluted, by Common Class, Including Two Class Method [Line Items]	'	'	'	'	'	'	'	'	'	'	'
Net income available to common stock	$1,266	$1,021	$1,021	$1,207	$618	$824	$770	$761	$4,515	$2,974	$3,016
Average number of shares issued (in shares)	'	'	'	'	'	'	'	'	8,019,352	7,970,174	7,950,748
Less: average unallocated ESOP shares (in shares)	'	'	'	'	'	'	'	'	-340,868	-383,264	-425,660
Less: average treasury stock (in shares)	'	'	'	'	'	'	'	'	-2,371,873	-2,142,150	-1,631,852
Less: average unvested restricted stock awards (in shares)	'	'	'	'	'	'	'	'	-2,460	-29,909	-86,259
Average number of basic shares outstanding (in shares)	5,327,928	5,313,484	5,300,289	5,274,900	5,372,849	5,389,400	5,401,349	5,495,803	5,304,151	5,414,851	5,806,977
Average number of diluted shares outstanding (in shares)	5,458,803	5,439,177	5,443,078	5,401,982	5,519,703	5,560,481	5,527,472	5,584,946	5,435,761	5,548,151	5,888,591
Basic earnings per share (in shares)	$0.24	$0.19	$0.19	$0.23	$0.12	$0.15	$0.14	$0.14	$0.85	$0.55	$0.52
Diluted earnings per share (in shares)	$0.23	$0.19	$0.19	$0.22	$0.11	$0.15	$0.14	$0.14	$0.83	$0.54	$0.51
Anti-dilutive securities excluded from computation of earnings per share (in shares)	'	'	'	'	'	'	'	'	10,000	0	0
Restricted Stock	'	'	'	'	'	'	'	'	'	'	'
Earnings Per Share, Diluted, by Common Class, Including Two Class Method [Line Items]	'	'	'	'	'	'	'	'	'	'	'
Plus: dilutive unvested restricted stock awards (in shares)	'	'	'	'	'	'	'	'	1,487	20,942	37,545
Stock Options	'	'	'	'	'	'	'	'	'	'	'
Earnings Per Share, Diluted, by Common Class, Including Two Class Method [Line Items]	'	'	'	'	'	'	'	'	'	'	'
Plus: dilutive unvested restricted stock awards (in shares)	'	'	'	'	'	'	'	'	130,123	112,358	44,069

Restrictions_on_Cash_and_Amoun1

Restrictions on Cash and Amounts Due from Banks (Detail) (USD $)	Jun. 30, 2014	Jun. 30, 2013
In Millions, unless otherwise specified
Cash and Cash Equivalents [Abstract]	'	'
Average cash balances required to be maintained on hand or with Federal Reserve Bank	$7.30	$6.40

Investment_Securities_Schedule

Investment Securities - Schedule of Amortized Cost and Estimated Fair Value (Detail) (USD $)	Jun. 30, 2014	Jun. 30, 2013
In Thousands, unless otherwise specified
Available for Sale	'	'
Amortized Cost	$133,703	$138,189
Gross Unrealized Gains	1,732	1,983
Gross Unrealized Losses	-1,499	-1,442
Fair Value	133,936	138,730
Held to Maturity	'	'
Amortized Cost	9,302	0
Gross Unrealized Gains	0	'
Gross Unrealized Losses	0	'
Fair Value	9,302	'
Debt securities	'	'
Available for Sale	'	'
Amortized Cost	133,652	138,138
Gross Unrealized Gains	1,704	1,966
Gross Unrealized Losses	-1,499	-1,442
Fair Value	133,857	138,662
Debt securities | Corporate bonds	'	'
Available for Sale	'	'
Amortized Cost	3,026	3,036
Gross Unrealized Gains	60	40
Gross Unrealized Losses	0	0
Fair Value	3,086	3,076
Debt securities | Agency	'	'
Available for Sale	'	'
Amortized Cost	128,938	132,498
Gross Unrealized Gains	1,629	1,916
Gross Unrealized Losses	-1,494	-1,426
Fair Value	129,073	132,988
Debt securities | Non-agency	'	'
Available for Sale	'	'
Amortized Cost	1,688	2,209
Gross Unrealized Gains	15	10
Gross Unrealized Losses	-5	-16
Fair Value	1,698	2,203
Debt securities | Municipal bonds	'	'
Available for Sale	'	'
Amortized Cost	'	395
Gross Unrealized Gains	'	0
Gross Unrealized Losses	'	0
Fair Value	'	395
Held to Maturity	'	'
Amortized Cost	9,302	'
Gross Unrealized Gains	0	'
Gross Unrealized Losses	0	'
Fair Value	9,302	'
Marketable equity securities	'	'
Available for Sale	'	'
Amortized Cost	51	51
Gross Unrealized Gains	28	17
Gross Unrealized Losses	0	0
Fair Value	$79	$68

Investment_Securities_Schedule1

Investment Securities - Schedule of Debt Securities by Contractual Maturity (Detail) (USD $)	Jun. 30, 2014
In Thousands, unless otherwise specified
Held-to-maturity Securities, Debt Maturities, Single Maturity Date, Amortized Cost Basis [Abstract]	'
Total amortized cost basis	$9,302
Held-to-maturity Securities, Debt Maturities, Fair Value, Rolling Maturity [Abstract]	'
Total fair value basis	9,302
Available for Sale	'
Total amortized cost basis	133,652
Available-for-sale Securities, Debt Maturities, Fair Value, Rolling Maturity [Abstract]	'
Securities available for sale, at fair value	133,857
Municipal And Corporate Bonds	'
Held-to-maturity Securities, Debt Maturities, Single Maturity Date, Amortized Cost Basis [Abstract]	'
Amortized cost within 1 year	6,813
Amortized cost, after year 1, but within 5 years	2,489
Total amortized cost basis	9,302
Held-to-maturity Securities, Debt Maturities, Fair Value, Rolling Maturity [Abstract]	'
Fair vale, within 1 year	6,813
Fair value, after year 1, but within 5 years	2,489
Total fair value basis	9,302
Available for Sale	'
Amortized cost within 1 year	0
Amortized cost, after year 1, but within 5 years	3,026
Total amortized cost basis	3,026
Available-for-sale Securities, Debt Maturities, Fair Value, Rolling Maturity [Abstract]	'
Fair value, within 1 year	0
Fair value, after 1 year but within 5 years	3,086
Securities available for sale, at fair value	3,086
Agency	'
Held-to-maturity Securities, Debt Maturities, Single Maturity Date, Amortized Cost Basis [Abstract]	'
Total amortized cost basis	0
Held-to-maturity Securities, Debt Maturities, Fair Value, Rolling Maturity [Abstract]	'
Total fair value basis	0
Available for Sale	'
Total amortized cost basis	128,938
Available-for-sale Securities, Debt Maturities, Fair Value, Rolling Maturity [Abstract]	'
Securities available for sale, at fair value	129,073
Non-agency	'
Held-to-maturity Securities, Debt Maturities, Single Maturity Date, Amortized Cost Basis [Abstract]	'
Total amortized cost basis	0
Held-to-maturity Securities, Debt Maturities, Fair Value, Rolling Maturity [Abstract]	'
Total fair value basis	0
Available for Sale	'
Total amortized cost basis	1,688
Available-for-sale Securities, Debt Maturities, Fair Value, Rolling Maturity [Abstract]	'
Securities available for sale, at fair value	$1,698

Investment_Securities_Schedule2

Investment Securities - Schedule of Securities with Gross Unrealized Losses (Detail) (Debt securities, USD $)	Jun. 30, 2014	Jun. 30, 2013
In Thousands, unless otherwise specified
Schedule of Available-for-sale Securities [Line Items]	'	'
Securities available for sale - Continuous unrealized loss position, less than 12 months - Gross unrealized losses	$39	$1,342
Securities available for sale - Continuous unrealized loss position, less than 12 months - Fair value	7,500	68,786
Securities available for sale - Continuous unrealized loss position, over 12 months - Gross unrealized losses	1,460	100
Securities available for sale - Continuous unrealized loss position, over 12 months - Fair value	51,328	7,189
Securities available for sale - Continuous unrealized loss - Gross unrealized losses	1,499	1,442
Securities available for sale - Continuous unrealized loss position - Fair value	58,828	75,975
Agency	'	'
Schedule of Available-for-sale Securities [Line Items]	'	'
Securities available for sale - Continuous unrealized loss position, less than 12 months - Gross unrealized losses	38	1,337
Securities available for sale - Continuous unrealized loss position, less than 12 months - Fair value	7,357	68,456
Securities available for sale - Continuous unrealized loss position, over 12 months - Gross unrealized losses	1,456	89
Securities available for sale - Continuous unrealized loss position, over 12 months - Fair value	51,094	6,142
Securities available for sale - Continuous unrealized loss - Gross unrealized losses	1,494	1,426
Securities available for sale - Continuous unrealized loss position - Fair value	58,451	74,598
Non-agency	'	'
Schedule of Available-for-sale Securities [Line Items]	'	'
Securities available for sale - Continuous unrealized loss position, less than 12 months - Gross unrealized losses	1	5
Securities available for sale - Continuous unrealized loss position, less than 12 months - Fair value	143	330
Securities available for sale - Continuous unrealized loss position, over 12 months - Gross unrealized losses	4	11
Securities available for sale - Continuous unrealized loss position, over 12 months - Fair value	234	1,047
Securities available for sale - Continuous unrealized loss - Gross unrealized losses	5	16
Securities available for sale - Continuous unrealized loss position - Fair value	$377	$1,377

Investment_Securities_Narrativ

Investment Securities - Narrative (Detail) (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2012
Schedule of Available-for-sale Securities [Line Items]	'	'	'
Securities reclassified from available-for-sale to held-to-maturity	$9,302	$0	$0
Proceeds from sales of securities available for sale	0	3,189	1,308
Gross realized gains on securities available for sale	'	114	19
Debt securities	'	'	'
Schedule of Available-for-sale Securities [Line Items]	'	'	'
Number of securities with unrealized losses (in securities)	47	'	'
Aggregate depreciation percentage from amortized cost basis	2.50%	'	'
Fair value of securities with unrealized losses	58,828	75,975	'
Debt securities | Private mortgage originators	'	'	'
Schedule of Available-for-sale Securities [Line Items]	'	'	'
Number of securities with unrealized losses (in securities)	9	'	'
Amortized cost of securities with unrealized losses	382	'	'
Fair value of securities with unrealized losses	$377	'	'

Loan_Servicing_Narrative_Detai

Loan Servicing - Narrative (Detail) (Mortgage Loans on Real Estate, USD $)	12 Months Ended
	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2012
Mortgage Loans on Real Estate	'	'	'
Servicing Assets at Fair Value [Line Items]	'	'	'
Loan servicing fees, annual percentage based on monthly outstanding balances of loans serviced	0.25%	'	'
Unpaid principal balance of mortgages serviced for others	$71,800,000	$67,700,000	'
Loan servicing fees recognized	$321,000	$346,000	$239,000

Loan_Servicing_Schedule_of_Ser

Loan Servicing - Schedule of Servicing Assets at Fair Value (Detail) (Other Assets, USD $)	12 Months Ended
In Thousands, unless otherwise specified	Jun. 30, 2014	Jun. 30, 2013
Other Assets	'	'
Servicing Assets at Fair Value [Line Items]	'	'
Fair value of servicing assets at the beginning of year	$654	$445
Capitalized servicing assets	97	48
Changes in fair value of servicing assets	41	161
Fair value of servicing assets at end of year	$792	$654

Loans_Schedule_of_Loan_Balance

Loans - Schedule of Loan Balances (Detail) (USD $)	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2011
In Thousands, unless otherwise specified
Loans Receivable [Line Items]	'	'	'	'
Total loans	$510,648	$453,035	'	'
Net deferred loan costs	2,638	2,726	'	'
Allowance for loan losses	-5,651	-5,414	-5,148	-5,473
Total loans, net	507,635	450,347	'	'
First Lien	'	'	'	'
Loans Receivable [Line Items]	'	'	'	'
Total loans	36,299	36,093	'	'
Second Lien	'	'	'	'
Loans Receivable [Line Items]	'	'	'	'
Total loans	39,845	42,328	'	'
Mortgage Loans on Real Estate	'	'	'	'
Loans Receivable [Line Items]	'	'	'	'
Total loans	424,388	378,392	'	'
One- to four-family	'	'	'	'
Loans Receivable [Line Items]	'	'	'	'
Total loans	107,498	107,617	'	'
Allowance for loan losses	-697	-762	-865	-893
Commercial	'	'	'	'
Loans Receivable [Line Items]	'	'	'	'
Total loans	200,750	167,381	'	'
Allowance for loan losses	-2,288	-2,215	-2,360	-2,922
Home equity: | First Lien	'	'	'	'
Loans Receivable [Line Items]	'	'	'	'
Total loans	36,299	36,093	'	'
Allowance for loan losses	-204	-233	-206	-196
Home equity: | Second Lien	'	'	'	'
Loans Receivable [Line Items]	'	'	'	'
Total loans	39,845	42,328	'	'
Allowance for loan losses	-268	-302	-280	-321
Residential Construction Loans	'	'	'	'
Loans Receivable [Line Items]	'	'	'	'
Total loans	3,807	3,736	'	'
Allowance for loan losses	-30	-33	-38	-33
Commercial Construction Loans	'	'	'	'
Loans Receivable [Line Items]	'	'	'	'
Total loans	36,189	21,237	'	'
Allowance for loan losses	-472	-315	-20	-32
Other Loan [Member]	'	'	'	'
Loans Receivable [Line Items]	'	'	'	'
Total loans	86,260	74,643	'	'
Commercial	'	'	'	'
Loans Receivable [Line Items]	'	'	'	'
Total loans	54,756	43,566	'	'
Allowance for loan losses	-1,216	-1,065	-969	-1,020
Manufactured homes	'	'	'	'
Loans Receivable [Line Items]	'	'	'	'
Total loans	21,766	21,716	'	'
Allowance for loan losses	-417	-432	-375	0
Automobile and other secured loans	'	'	'	'
Loans Receivable [Line Items]	'	'	'	'
Total loans	7,172	7,682	'	'
Allowance for loan losses	-30	-34	-25	0
Other	'	'	'	'
Loans Receivable [Line Items]	'	'	'	'
Total loans	2,566	1,679	'	'
Allowance for loan losses	($29)	($23)	($10)	($56)

Loans_Narrative_Detail

Loans - Narrative (Detail) (USD $)	12 Months Ended
	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2012
Loans Receivable [Line Items]	'	'	'
Purchase of loans	$5,321,000	$6,576,000	$8,390,000
Manufactured homes	'	'	'
Loans Receivable [Line Items]	'	'	'
Purchase of loans	3,000,000	2,900,000	'
Automobile and other secured loans	'	'	'
Loans Receivable [Line Items]	'	'	'
Purchase of loans	2,300,000	3,700,000	'
Commercial Real Estate and Commercial Loans	'	'	'
Loans Receivable [Line Items]	'	'	'
Loans sold and serviced by the company	$34,400,000	$35,000,000	'

Loans_Schedule_of_Loans_by_Ris

Loans - Schedule of Loans by Risk Rating (Detail) (USD $)	Jun. 30, 2014	Jun. 30, 2013
In Thousands, unless otherwise specified
Financing Receivable, Recorded Investment [Line Items]	'	'
Total loans	$510,648	$453,035
Loans rated 1-5	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Total loans	485,473	429,656
Loans rated 6	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Total loans	13,671	9,599
Loans rated 7	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Total loans	11,153	12,827
Loans rated 8	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Total loans	351	953
Loans rated 9	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Total loans	0	0
First Lien	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Total loans	36,299	36,093
Second Lien	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Total loans	39,845	42,328
Commercial	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Total loans	54,756	43,566
Commercial | Loans rated 1-5	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Total loans	49,874	36,827
Commercial | Loans rated 6	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Total loans	533	994
Commercial | Loans rated 7	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Total loans	4,349	5,745
Commercial | Loans rated 8	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Total loans	0	0
Commercial | Loans rated 9	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Total loans	0	0
Manufactured homes	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Total loans	21,766	21,716
Manufactured homes | Loans rated 1-5	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Total loans	21,342	21,398
Manufactured homes | Loans rated 6	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Total loans	160	146
Manufactured homes | Loans rated 7	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Total loans	59	36
Manufactured homes | Loans rated 8	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Total loans	205	136
Manufactured homes | Loans rated 9	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Total loans	0	0
Automobile and other secured loans	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Total loans	7,172	7,682
Automobile and other secured loans | Loans rated 1-5	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Total loans	7,172	7,682
Automobile and other secured loans | Loans rated 6	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Total loans	0	0
Automobile and other secured loans | Loans rated 7	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Total loans	0	0
Automobile and other secured loans | Loans rated 8	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Total loans	0	0
Automobile and other secured loans | Loans rated 9	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Total loans	0	0
Other	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Total loans	2,566	1,679
Other | Loans rated 1-5	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Total loans	2,564	1,678
Other | Loans rated 6	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Total loans	1	0
Other | Loans rated 7	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Total loans	1	1
Other | Loans rated 8	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Total loans	0	0
Other | Loans rated 9	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Total loans	0	0
One- to four-family	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Total loans	107,498	107,617
One- to four-family | Loans rated 1-5	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Total loans	104,221	105,529
One- to four-family | Loans rated 6	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Total loans	523	835
One- to four-family | Loans rated 7	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Total loans	2,608	686
One- to four-family | Loans rated 8	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Total loans	146	567
One- to four-family | Loans rated 9	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Total loans	0	0
Commercial	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Total loans	200,750	167,381
Commercial | Loans rated 1-5	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Total loans	184,317	153,513
Commercial | Loans rated 6	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Total loans	12,447	7,624
Commercial | Loans rated 7	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Total loans	3,986	6,244
Commercial | Loans rated 8	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Total loans	0	0
Commercial | Loans rated 9	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Total loans	0	0
Home equity: | First Lien	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Total loans	36,299	36,093
Home equity: | First Lien | Loans rated 1-5	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Total loans	36,299	36,093
Home equity: | First Lien | Loans rated 6	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Total loans	0	0
Home equity: | First Lien | Loans rated 7	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Total loans	0	0
Home equity: | First Lien | Loans rated 8	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Total loans	0	0
Home equity: | First Lien | Loans rated 9	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Total loans	0	0
Home equity: | Second Lien	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Total loans	39,845	42,328
Home equity: | Second Lien | Loans rated 1-5	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Total loans	39,688	41,963
Home equity: | Second Lien | Loans rated 6	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Total loans	7	0
Home equity: | Second Lien | Loans rated 7	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Total loans	150	115
Home equity: | Second Lien | Loans rated 8	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Total loans	0	250
Home equity: | Second Lien | Loans rated 9	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Total loans	0	0
Residential Construction Loans	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Total loans	3,807	3,736
Residential Construction Loans | Loans rated 1-5	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Total loans	3,807	3,736
Residential Construction Loans | Loans rated 6	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Total loans	0	0
Residential Construction Loans | Loans rated 7	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Total loans	0	0
Residential Construction Loans | Loans rated 8	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Total loans	0	0
Residential Construction Loans | Loans rated 9	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Total loans	0	0
Commercial Construction Loans	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Total loans	36,189	21,237
Commercial Construction Loans | Loans rated 1-5	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Total loans	36,189	21,237
Commercial Construction Loans | Loans rated 6	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Total loans	0	0
Commercial Construction Loans | Loans rated 7	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Total loans	0	0
Commercial Construction Loans | Loans rated 8	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Total loans	0	0
Commercial Construction Loans | Loans rated 9	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Total loans	$0	$0

Loans_Troubled_Debt_Restructur

Loans - Troubled Debt Restructurings - Narrative (Detail) (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2012
	Loan	Loan	Loan
Financing Receivable, Modifications [Line Items]	'	'	'
Number of new troubled debt restructuring loan relationships (in loans)	0	2	2
Commercial Real Estate	'	'	'
Financing Receivable, Modifications [Line Items]	'	'	'
Pre-modification carrying value of loan	'	528	'
Post-modification carrying value of loan	'	551	'
Impairment of restructured loan	'	13	'
Restructured loans with payment defaults	'	'	170
Commercial	'	'	'
Financing Receivable, Modifications [Line Items]	'	'	'
Pre-modification carrying value of loan	'	1,000	'
Post-modification carrying value of loan	'	'	686
Home Equity Loan	'	'	'
Financing Receivable, Modifications [Line Items]	'	'	'
Pre-modification carrying value of loan	'	'	225
Post-modification carrying value of loan	'	'	232
One- to four-family	'	'	'
Financing Receivable, Modifications [Line Items]	'	'	'
Restructured loans with payment defaults	'	'	199
Home equity:	'	'	'
Financing Receivable, Modifications [Line Items]	'	'	'
Restructured loans with payment defaults	'	'	26

Loans_Schedule_of_Past_Due_and

Loans - Schedule of Past Due and Non-Accrual Loans (Detail) (USD $)	Jun. 30, 2014	Jun. 30, 2013
Financing Receivable, Recorded Investment, Past Due [Line Items]	'	'
30-59 Days Past Due	$1,665,000	$1,120,000
60-89 Days Past Due	264,000	104,000
90 Days or Greater Past Due	4,288,000	3,368,000
Total Past Due	6,217,000	4,592,000
Loans on Non-accrual	5,179,000	3,979,000
Number of loans past due 90 days or more and still accruing (in loans)	0	0
One- to four-family	'	'
Financing Receivable, Recorded Investment, Past Due [Line Items]	'	'
30-59 Days Past Due	607,000	642,000
60-89 Days Past Due	236,000	0
90 Days or Greater Past Due	2,437,000	1,013,000
Total Past Due	3,280,000	1,655,000
Loans on Non-accrual	2,755,000	1,405,000
Commercial	'	'
Financing Receivable, Recorded Investment, Past Due [Line Items]	'	'
30-59 Days Past Due	583,000	148,000
60-89 Days Past Due	0	0
90 Days or Greater Past Due	0	0
Total Past Due	583,000	148,000
Loans on Non-accrual	534,000	148,000
Home equity: | First Lien	'	'
Financing Receivable, Recorded Investment, Past Due [Line Items]	'	'
30-59 Days Past Due	0	0
60-89 Days Past Due	0	0
90 Days or Greater Past Due	0	0
Total Past Due	0	0
Loans on Non-accrual	0	0
Home equity: | Second Lien	'	'
Financing Receivable, Recorded Investment, Past Due [Line Items]	'	'
30-59 Days Past Due	159,000	180,000
60-89 Days Past Due	0	29,000
90 Days or Greater Past Due	111,000	268,000
Total Past Due	270,000	477,000
Loans on Non-accrual	150,000	335,000
Commercial	'	'
Financing Receivable, Recorded Investment, Past Due [Line Items]	'	'
30-59 Days Past Due	0	16,000
60-89 Days Past Due	0	75,000
90 Days or Greater Past Due	1,500,000	1,984,000
Total Past Due	1,500,000	2,075,000
Loans on Non-accrual	1,500,000	1,988,000
Manufactured homes	'	'
Financing Receivable, Recorded Investment, Past Due [Line Items]	'	'
30-59 Days Past Due	304,000	115,000
60-89 Days Past Due	27,000	0
90 Days or Greater Past Due	240,000	103,000
Total Past Due	571,000	218,000
Loans on Non-accrual	240,000	103,000
Automobile and other secured loans	'	'
Financing Receivable, Recorded Investment, Past Due [Line Items]	'	'
30-59 Days Past Due	0	18,000
60-89 Days Past Due	0	0
90 Days or Greater Past Due	0	0
Total Past Due	0	18,000
Loans on Non-accrual	0	0
Other	'	'
Financing Receivable, Recorded Investment, Past Due [Line Items]	'	'
30-59 Days Past Due	12,000	1,000
60-89 Days Past Due	1,000	0
90 Days or Greater Past Due	0	0
Total Past Due	13,000	1,000
Loans on Non-accrual	$0	$0

Loans_Schedule_of_Impaired_Loa

Loans - Schedule of Impaired Loans by Category (Detail) (USD $)	Jun. 30, 2014	Jun. 30, 2013
In Thousands, unless otherwise specified
Financing Receivable, Impaired [Line Items]	'	'
Impaired loans without a valuation allowance, recorded investment	$9,243	$12,213
Impaired loans without a valuation allowance, unpaid principal balance	9,358	12,491
Impaired loans with a valuation allowance, recorded investment	537	2,741
Impaired loans with a valuation allowance, unpaid principal balance	537	2,741
Impaired loans with a valuation allowance, related allowance	11	32
Total impaired loans, recorded investment	9,780	14,954
Total impaired loans, unpaid principal balance	9,895	15,232
One- to four-family	'	'
Financing Receivable, Impaired [Line Items]	'	'
Impaired loans without a valuation allowance, recorded investment	2,755	1,405
Impaired loans without a valuation allowance, unpaid principal balance	2,814	1,676
Commercial	'	'
Financing Receivable, Impaired [Line Items]	'	'
Impaired loans without a valuation allowance, recorded investment	3,147	5,962
Impaired loans without a valuation allowance, unpaid principal balance	3,147	5,962
Impaired loans with a valuation allowance, recorded investment	537	2,208
Impaired loans with a valuation allowance, unpaid principal balance	537	2,208
Impaired loans with a valuation allowance, related allowance	11	32
Home equity: | Second Lien	'	'
Financing Receivable, Impaired [Line Items]	'	'
Impaired loans without a valuation allowance, recorded investment	150	335
Impaired loans without a valuation allowance, unpaid principal balance	170	335
Commercial	'	'
Financing Receivable, Impaired [Line Items]	'	'
Impaired loans without a valuation allowance, recorded investment	2,952	4,408
Impaired loans without a valuation allowance, unpaid principal balance	2,952	4,415
Impaired loans with a valuation allowance, recorded investment	0	533
Impaired loans with a valuation allowance, unpaid principal balance	0	533
Impaired loans with a valuation allowance, related allowance	0	0
Manufactured homes	'	'
Financing Receivable, Impaired [Line Items]	'	'
Impaired loans without a valuation allowance, recorded investment	239	103
Impaired loans without a valuation allowance, unpaid principal balance	$275	$103

Loans_Schedule_of_Impaired_Loa1

Loans - Schedule of Impaired Loans, Average Recorded Investment and Interest Income Recognized (Detail) (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2012
	Loan
Financing Receivable, Impaired [Line Items]	'	'	'
Number of impaired loans committed to be advanced (in loans)	0	'	'
Average investment in impaired loans	$12,112	$16,998	$17,466
Interest income recognized on impaired loans	425	913	1,035
Interest income recognized on a cash basis on impaired loans	62	898	1,020
One- to four-family	'	'	'
Financing Receivable, Impaired [Line Items]	'	'	'
Average investment in impaired loans	1,682	1,506	1,789
Interest income recognized on impaired loans	36	69	89
Interest income recognized on a cash basis on impaired loans	33	69	89
Commercial	'	'	'
Financing Receivable, Impaired [Line Items]	'	'	'
Average investment in impaired loans	5,905	10,795	10,482
Interest income recognized on impaired loans	252	682	701
Interest income recognized on a cash basis on impaired loans	17	682	685
Home equity: | First Lien	'	'	'
Financing Receivable, Impaired [Line Items]	'	'	'
Average investment in impaired loans	0	34	0
Interest income recognized on impaired loans	0	2	0
Interest income recognized on a cash basis on impaired loans	0	2	0
Home equity: | Second Lien	'	'	'
Financing Receivable, Impaired [Line Items]	'	'	'
Average investment in impaired loans	214	238	253
Interest income recognized on impaired loans	5	11	4
Interest income recognized on a cash basis on impaired loans	5	7	4
Commercial Construction Loans	'	'	'
Financing Receivable, Impaired [Line Items]	'	'	'
Average investment in impaired loans	0	0	232
Interest income recognized on impaired loans	0	0	15
Interest income recognized on a cash basis on impaired loans	0	0	15
Commercial	'	'	'
Financing Receivable, Impaired [Line Items]	'	'	'
Average investment in impaired loans	4,199	4,294	4,606
Interest income recognized on impaired loans	131	138	226
Interest income recognized on a cash basis on impaired loans	6	138	226
Manufactured homes	'	'	'
Financing Receivable, Impaired [Line Items]	'	'	'
Average investment in impaired loans	112	131	104
Interest income recognized on impaired loans	1	11	0
Interest income recognized on a cash basis on impaired loans	$1	$0	$1

Loans_Schedule_of_Allowance_fo

Loans - Schedule of Allowance for Loan Losses (Detail) (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2012
Allowance:	'	'	'
Beginning balance	$5,414	$5,148	$5,473
Charge-offs	-387	-544	-859
Recoveries	74	135	109
Provision (credit)	550	675	425
Ending balance	5,651	5,414	5,148
Impaired loans	11	32	'
Non-impaired loans	5,640	5,382	'
Total allowance for loan losses	5,651	5,414	5,148
Loans:	'	'	'
Impaired loans	9,780	14,954	'
Non-impaired loans	500,868	438,081	'
Total loans	510,648	453,035	'
First Lien	'	'	'
Loans:	'	'	'
Total loans	36,299	36,093	'
Second Lien	'	'	'
Loans:	'	'	'
Total loans	39,845	42,328	'
One- to four-family	'	'	'
Allowance:	'	'	'
Beginning balance	762	865	893
Charge-offs	-147	-185	-391
Recoveries	0	8	71
Provision (credit)	82	74	292
Ending balance	697	762	865
Impaired loans	0	0	'
Non-impaired loans	697	762	'
Total allowance for loan losses	697	762	865
Loans:	'	'	'
Impaired loans	2,755	1,405	'
Non-impaired loans	104,743	106,212	'
Total loans	107,498	107,617	'
Commercial	'	'	'
Allowance:	'	'	'
Beginning balance	2,215	2,360	2,922
Charge-offs	-22	-207	-166
Recoveries	0	0	16
Provision (credit)	95	62	-412
Ending balance	2,288	2,215	2,360
Impaired loans	11	32	'
Non-impaired loans	2,277	2,183	'
Total allowance for loan losses	2,288	2,215	2,360
Loans:	'	'	'
Impaired loans	3,684	8,170	'
Non-impaired loans	197,066	159,211	'
Total loans	200,750	167,381	'
Home equity: | First Lien	'	'	'
Allowance:	'	'	'
Beginning balance	233	206	196
Charge-offs	0	0	-69
Recoveries	5	4	5
Provision (credit)	-34	23	74
Ending balance	204	233	206
Impaired loans	0	0	'
Non-impaired loans	204	233	'
Total allowance for loan losses	204	233	206
Loans:	'	'	'
Impaired loans	0	0	'
Non-impaired loans	36,299	36,093	'
Total loans	36,299	36,093	'
Home equity: | Second Lien	'	'	'
Allowance:	'	'	'
Beginning balance	302	280	321
Charge-offs	-19	-70	0
Recoveries	0	0	0
Provision (credit)	-15	92	-41
Ending balance	268	302	280
Impaired loans	0	0	'
Non-impaired loans	268	302	'
Total allowance for loan losses	268	302	280
Loans:	'	'	'
Impaired loans	150	335	'
Non-impaired loans	39,695	41,993	'
Total loans	39,845	42,328	'
Residential Construction Loans	'	'	'
Allowance:	'	'	'
Beginning balance	33	38	33
Charge-offs	0	0	0
Recoveries	0	0	0
Provision (credit)	-3	-5	5
Ending balance	30	33	38
Impaired loans	0	0	'
Non-impaired loans	30	33	'
Total allowance for loan losses	30	33	38
Loans:	'	'	'
Impaired loans	0	0	'
Non-impaired loans	3,807	3,736	'
Total loans	3,807	3,736	'
Commercial Construction Loans	'	'	'
Allowance:	'	'	'
Beginning balance	315	20	32
Charge-offs	0	0	0
Recoveries	0	0	0
Provision (credit)	157	295	-12
Ending balance	472	315	20
Impaired loans	0	0	'
Non-impaired loans	472	315	'
Total allowance for loan losses	472	315	20
Loans:	'	'	'
Impaired loans	0	0	'
Non-impaired loans	36,189	21,237	'
Total loans	36,189	21,237	'
Commercial	'	'	'
Allowance:	'	'	'
Beginning balance	1,065	969	1,020
Charge-offs	0	0	-213
Recoveries	50	104	11
Provision (credit)	101	-8	151
Ending balance	1,216	1,065	969
Impaired loans	0	0	'
Non-impaired loans	1,216	1,065	'
Total allowance for loan losses	1,216	1,065	969
Loans:	'	'	'
Impaired loans	2,952	4,941	'
Non-impaired loans	51,804	38,625	'
Total loans	54,756	43,566	'
Manufactured homes	'	'	'
Allowance:	'	'	'
Beginning balance	432	375	0
Charge-offs	-189	0	0
Recoveries	0	0	0
Provision (credit)	174	57	375
Ending balance	417	432	375
Impaired loans	0	0	'
Non-impaired loans	417	432	'
Total allowance for loan losses	417	432	375
Loans:	'	'	'
Impaired loans	239	103	'
Non-impaired loans	21,527	21,613	'
Total loans	21,766	21,716	'
Automobile and other secured loans	'	'	'
Allowance:	'	'	'
Beginning balance	34	25	0
Charge-offs	-5	-53	0
Recoveries	18	12	0
Provision (credit)	-17	50	25
Ending balance	30	34	25
Impaired loans	0	0	'
Non-impaired loans	30	34	'
Total allowance for loan losses	30	34	25
Loans:	'	'	'
Impaired loans	0	0	'
Non-impaired loans	7,172	7,682	'
Total loans	7,172	7,682	'
Other	'	'	'
Allowance:	'	'	'
Beginning balance	23	10	56
Charge-offs	-5	-29	-20
Recoveries	1	7	6
Provision (credit)	10	35	-32
Ending balance	29	23	10
Impaired loans	0	0	'
Non-impaired loans	29	23	'
Total allowance for loan losses	29	23	10
Loans:	'	'	'
Impaired loans	0	0	'
Non-impaired loans	2,566	1,679	'
Total loans	$2,566	$1,679	'

Premises_and_Equipment_Schedul

Premises and Equipment - Schedule of Cost and Depreciation of Premises and Equipment (Detail) (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2012
Property, Plant and Equipment [Line Items]	'	'	'
Premises and equipment	$13,248	$12,913	'
Accumulated depreciation and amortization	-8,580	-7,903	'
Premises and equipment, net	4,668	5,010	'
Depreciation and amortization	671	734	764
Land	'	'	'
Property, Plant and Equipment [Line Items]	'	'	'
Premises and equipment	763	763	'
Building and Building Improvements	'	'	'
Property, Plant and Equipment [Line Items]	'	'	'
Premises and equipment	5,693	5,616	'
Building and Building Improvements | Minimum	'	'	'
Property, Plant and Equipment [Line Items]	'	'	'
Estimated Useful Lives	'5 years	'5 years	'
Building and Building Improvements | Maximum	'	'	'
Property, Plant and Equipment [Line Items]	'	'	'
Estimated Useful Lives	'39 years	'39 years	'
Leasehold Improvements	'	'	'
Property, Plant and Equipment [Line Items]	'	'	'
Premises and equipment	2,902	2,811	'
Leasehold Improvements | Minimum	'	'	'
Property, Plant and Equipment [Line Items]	'	'	'
Estimated Useful Lives	'5 years	'5 years	'
Leasehold Improvements | Maximum	'	'	'
Property, Plant and Equipment [Line Items]	'	'	'
Estimated Useful Lives	'10 years	'10 years	'
Equipment	'	'	'
Property, Plant and Equipment [Line Items]	'	'	'
Premises and equipment	$3,890	$3,723	'
Equipment | Minimum	'	'	'
Property, Plant and Equipment [Line Items]	'	'	'
Estimated Useful Lives	'3 years	'3 years	'
Equipment | Maximum	'	'	'
Property, Plant and Equipment [Line Items]	'	'	'
Estimated Useful Lives	'10 years	'10 years	'

Deposits_Schedule_of_Deposit_B

Deposits - Schedule of Deposit Balances by Type (Detail) (USD $)	Jun. 30, 2014	Jun. 30, 2013
In Thousands, unless otherwise specified
Deposits, by Type [Abstract]	'	'
Demand	$84,224	$74,081
NOW	42,376	46,220
Regular and other savings	102,909	104,893
Money market deposits	99,505	84,277
Total non-certificate accounts	329,014	309,471
Term certificates less than $100,000	60,027	67,398
Term certificates of $100,000 and greater	102,691	97,929
Total certificate accounts	162,718	165,327
Total deposits	$491,732	$474,798

Deposits_Schedule_of_Time_Depo

Deposits - Schedule of Time Deposits by Maturity (Detail) (USD $)	Jun. 30, 2014	Jun. 30, 2013
In Thousands, unless otherwise specified
Maturities of Time Deposits [Abstract]	'	'
Deposits maturing in year ending June 30, 2015	$68,184	'
Deposits maturing in year ending June 30, 2016	32,233	'
Deposits maturing in year ending June 30, 2017	31,646	'
Deposits maturing in year ending June 30, 2018	13,895	'
Deposits maturing in year ending June 30, 2019	16,760	'
Total certificate accounts	$162,718	$165,327

ShortTerm_Borrowings_Detail

Short-Term Borrowings (Detail) (USD $)	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2014	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014
			Federal Home Loan Bank of Boston	FHLB Ideal Way Line of Credit	FHLB Ideal Way Line of Credit	Federal Reserve Bank of Boston	Bankers Bank Northeast	Short-term borrowings	Short-term borrowings	Hampden Investment Corporation
								Federal Home Loan Bank of Boston	Federal Home Loan Bank of Boston
Short-term Debt [Line Items]	'	'	'	'	'	'	'	'	'	'
FHLB advances, weighted average rate	0.53%	1.45%	'	'	'	'	'	0.33%	0.37%	'
Percentage of carrying value of first mortgage and first lien fixed rate home equity loans on owner-occupied residential property and investments held at Hampden Investment Corporation securing borrowings under a blanket lien provided to the FHLB	'	'	75.00%	'	'	'	'	'	'	'
Assets	$701,497,000	$652,962,000	'	'	'	'	'	'	'	$108,700,000
Line of credit, amount available	'	'	'	2,000,000	2,000,000	10,000,000	7,400,000	'	'	'
Line of credit, amount outstanding	'	'	'	0	0	0	'	'	'	'
Investments pledged for collateral with FHLB, market value	'	'	$11,300,000	'	'	'	'	'	'	'

LongTerm_Debt_Schedule_of_Fede

Long-Term Debt - Schedule of Federal Home Loan Bank Advances (Detail) (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Jun. 30, 2014		Jun. 30, 2013
Federal Home Loan Bank, Advances, Fiscal Year Maturity [Abstract	'		'
Due in next twelve months	$13,427	[1]	$3,754
Due in year two	35,800		6,053	[1]
Due in year three	26,000		28,800
Due in year four	18,885		25,000
Due in year five	'		18,885
Due in year eight	8,992	[1]	'
Due in year ten	9,342	[1]	'
Total FHLB advances	$112,446		$82,492
Federal Home Loan Bank, Advances, Maturities Summary, Average Interest Rate of Amounts Due [Abstract]	'		'
FHLB advances maturing year one, weighted average rate	0.53%		1.45%
FHLB advances maturing year two, weighted average rate	1.30%		0.85%
FHLB advances maturing year three, weighted average rate	1.92%		1.47%
FHLB advances maturing year four, weighted average rate	2.09%		1.95%
FHLB advances maturing year five, weighted average rate	'		2.09%
FHLB advances maturing year seven, weighted average rate	1.94%		'
FHLB advances maturing year ten, weighted average rate	2.75%		'
Total FHLB advances, weighted average rate	1.66%		1.71%
[1]	For all starred items at JuneB 30, 2014, includes amortizing advances aggregating $19.6 million requiring combined monthly principal and interest payments of $360,000.

LongTerm_Debt_Schedule_of_Fede1

Long-Term Debt - Schedule of Federal Home Loan Bank Advances (Parenthetical) (Detail) (Long-term debt, Federal Home Loan Bank of Boston, USD $)	12 Months Ended
	Jun. 30, 2014
Long-term debt | Federal Home Loan Bank of Boston	'
Federal Home Loan Bank, Advances, Branch of FHLB Bank [Line Items]	'
Amortizing advances	$19,600,000
Combined monthly principal and interest payments required for amortizing advances	$360,000

LongTerm_Debt_Narrative_Detail

Long-Term Debt - Narrative (Detail) (USD $)	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Sep. 30, 2012
In Millions, unless otherwise specified			Federal Home Loan Bank of Boston	Federal Home Loan Bank of Boston
				Restructured FHLB Advances
Federal Home Loan Bank, Advances, Branch of FHLB Bank [Line Items]	'	'	'	'
Callable amount of FHLB advances	'	'	$6	'
FHLB advances	'	'	'	$8.60
Reduction in weighted average cost of FHLB advances	'	'	'	1.00%
Weighted average cost of FHLB advances	1.66%	1.71%	'	2.74%

Income_Taxes_Schedule_of_Tax_P

Income Taxes - Schedule of Tax Provision by Jurisdiction Category and Classification (Detail) (USD $)	3 Months Ended								12 Months Ended
In Thousands, unless otherwise specified	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2012	Sep. 30, 2012	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2012
Current tax provision:	'	'	'	'	'	'	'	'	'	'	'
Federal	'	'	'	'	'	'	'	'	$1,672	$1,564	$452
State	'	'	'	'	'	'	'	'	350	392	35
Total current tax provision	'	'	'	'	'	'	'	'	2,022	1,956	487
Deferred tax provision (benefit):	'	'	'	'	'	'	'	'	'	'	'
Federal	'	'	'	'	'	'	'	'	398	610	1,019
State	'	'	'	'	'	'	'	'	124	-54	252
Total deferred tax benefit, gross	'	'	'	'	'	'	'	'	522	556	1,271
Change in valuation allowance	'	'	'	'	'	'	'	'	0	-735	25
Total deferred tax benefit, net	'	'	'	'	'	'	'	'	522	-179	1,296
Total tax provision	$714	$575	$577	$679	$347	$485	$453	$492	$2,544	$1,777	$1,783

Income_Taxes_Schedule_of_Effec

Income Taxes - Schedule of Effective Income Tax Rate Reconciliation (Detail)	12 Months Ended
	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2012
Income Tax Disclosure [Abstract]	'	'	'
Statutory tax rate	34.00%	34.00%	34.00%
State taxes, net of federal tax benefit	4.40%	4.70%	3.90%
Tax exempt income	-0.80%	-0.60%	-0.60%
Bank-owned life insurance	-2.40%	-3.80%	-3.20%
Change in valuation allowance assumptions, net of carryover expiration	0.00%	0.70%	0.50%
Stock options	-0.20%	1.30%	1.80%
Other, net	1.00%	1.10%	0.80%
Effective income tax rate	36.00%	37.40%	37.20%

Income_Taxes_Schedule_of_Defer

Income Taxes - Schedule of Deferred Tax Assets and Liabilities (Detail) (USD $)	Jun. 30, 2014	Jun. 30, 2013
In Thousands, unless otherwise specified
Deferred tax assets:	'	'
Federal	$3,923	$4,297
State	1,132	1,257
Total deferred tax assets, before valuation reserve	5,055	5,554
Deferred tax liabilities:	'	'
Federal	-689	-786
State	-184	-184
Total deferred tax liabilities	-873	-970
Net deferred tax asset	$4,182	$4,584

Income_Taxes_Schedule_of_Compo

Income Taxes - Schedule of Components of Deferred Taxes (Detail) (USD $)	Jun. 30, 2014	Jun. 30, 2013
In Thousands, unless otherwise specified
Income Tax Disclosure [Abstract]	'	'
Non-accrued interest income	$158	$64
Net unrealized gain on securities available for sale	-75	-195
Depreciation	439	547
Mortgage servicing rights	-316	-261
Allowance for loan losses	2,345	2,261
Employee benefit plans	1,771	2,234
Other-than-temporary impairment of securities	0	91
Other, net	-140	-157
Net deferred tax asset	$4,182	$4,584

Income_Taxes_Narrative_Detail

Income Taxes - Narrative (Detail) (USD $)	12 Months Ended				12 Months Ended		0 Months Ended
	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2012	Oct. 31, 2012	Jun. 30, 2013	Jun. 30, 2012	Jan. 16, 2007
				Charitable Contribution	Valuation Allowance, Charitable Contribution Carryforward	Valuation Allowance, Charitable Contribution Carryforward	Hampden Bank Charitable Foundation
							Charitable Contribution
Income Taxes [Line Items]	'	'	'	'	'	'	'
Income tax expense related to expiration of charitable contribution carryforward	'	'	'	'	$35,000	'	'
Change in valuation allowance	0	-735,000	25,000	'	'	25,000	'
Charitable contribution carryforward, gross amount	'	'	'	3,500,000	'	'	'
Number of common shares contributed as part of the Bank's mutual to stock conversion	'	'	'	'	'	'	378,566
Federal income tax reserve for loan losses	2,300,000	'	'	'	'	'	'
Approximate percentage of federal income tax reserve for loan losses that would be subject to taxation in the fiscal year in which used other than to absorb loan losses	150.00%	'	'	'	'	'	'
Deferred income tax liability not provided	$887,000	'	'	'	'	'	'

Commitments_and_Contingencies_1

Commitments and Contingencies - Schedule of Off-balance-sheet Credit Risks (Detail) (USD $)	Jun. 30, 2014	Jun. 30, 2013
In Thousands, unless otherwise specified
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]	'	'
Off-balance-sheet credit risk liability	$134,104	$155,551
Commitments to Grant Loans	'	'
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]	'	'
Off-balance-sheet credit risk liability	20,380	63,607
Unadvanced Funds on Lines of Credit | Home equity:	'	'
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]	'	'
Off-balance-sheet credit risk liability	35,718	34,498
Unadvanced Funds on Lines of Credit | Personal Line of Credit	'	'
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]	'	'
Off-balance-sheet credit risk liability	1,828	1,852
Unadvanced Funds on Lines of Credit | Commercial Line of Credit	'	'
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]	'	'
Off-balance-sheet credit risk liability	37,789	29,882
Unadvanced Funds on Loans | Construction Loans	'	'
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]	'	'
Off-balance-sheet credit risk liability	37,889	25,164
Standby Letters of Credit	'	'
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]	'	'
Off-balance-sheet credit risk liability	$500	$548

Commitments_and_Contingencies_2

Commitments and Contingencies - Operating Leases - Narrative (Detail) (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2012
Operating Leased Assets [Line Items]	'	'	'
Future minimum rent payments under operating leases due in year ended June 30, 2015	$349	'	'
Future minimum rent payments under operating leases due in year ended June 30, 2016	331	'	'
Future minimum rent payments under operating leases due in year ended June 30, 2017	330	'	'
Future minimum rent payments under operating leases due in year ended June 30, 2018	297	'	'
Future minimum rent payments under operating leases due in year ended June 30, 2019	271	'	'
Future minimum rent payments under operating leases due thereafter	1,567	'	'
Rent expense under operating leases	$366	$378	$324
Minimum	'	'	'
Operating Leased Assets [Line Items]	'	'	'
Option to extend operating lease term, number of years	'5 years	'	'
Maximum	'	'	'
Operating Leased Assets [Line Items]	'	'	'
Option to extend operating lease term, number of years	'10 years	'	'

Commitments_and_Contingencies_3

Commitments and Contingencies - Employment and Change of Control Agreements - Narrative (Detail)	1 Months Ended		12 Months Ended	1 Months Ended
	Oct. 31, 2012	Oct. 31, 2012	Jun. 30, 2014	Oct. 31, 2012	Nov. 30, 2013	Nov. 30, 2013
	Chief Executive Officer	President	President	Officer	Officer	Officer
					Minimum	Maximum
Commitments and Contingencies Disclosure [Line Items]	'	'	'	'	'	'
Initial term of employment agreement	'3 years	'	'3 years	'	'	'
Automatic extension of agreement term	'12 months	'	'12 months	'	'	'
Minimum term of non-competition and non-disclosure restrictions following termination of executive's employment	'1 year	'	'1 year	'	'	'
Term of severance pay coverage upon change in control	'2 years	'	'2 years	'	'	'
Number of years prior to termination used to determine average annual compensation for change-in-control severance payment	'5 years	'	'5 years	'5 years	'	'
Employment and change-of-control agreement, annual salary multiplier	200.00%	200.00%	'	'	100.00%	200.00%

Minimum_Regulatory_Capital_Req2

Minimum Regulatory Capital Requirements - Schedule of Regulatory Capital Amounts and Ratios (Detail) (USD $)	Jun. 30, 2014	Jun. 30, 2013
In Thousands, unless otherwise specified
Capital [Abstract]	'	'
Total capital (to risk weighted assets), actual, amount	$92,586	$88,670
Total capital (to risk weighted assets), minimum for capital adequacy purposes, amount	40,547	37,077
Tier One Leverage Capital [Abstract]	'	'
Tier 1 capital (to average assets), actual, amount	86,922	83,248
Tier 1 capital (to average assets), minimum for capital adequacy purposes, amount	28,420	26,240
Risk Based Ratios [Abstract]	'	'
Total capital (to risk weighted assets), actual, ratio	18.30%	19.10%
Total capital (to risk weighted assets), minimum for capital adequacy purposes, ratio	8.00%	8.00%
Tier 1 capital (to risk weighted assets), actual, ratio	17.20%	18.00%
Tier 1 capital (to risk weighted assets), minimum for capital adequacy purposes, ratio	4.00%	4.00%
Leverage Ratios [Abstract]	'	'
Tier 1 capital (to average assets), actual, ratio	12.20%	12.70%
Tier 1 capital (to average assets), minimum for capital adequacy purposes, ratio	4.00%	4.00%
Tier One Risk Based Capital [Abstract]	'	'
Tier 1 capital (to risk weighted assets), actual, amount	86,922	83,248
Tier 1 capital (to risk weighted assets), minimum for capital adequacy purposes, amount	20,273	18,538
Hampden Bank	'	'
Capital [Abstract]	'	'
Total capital (to risk weighted assets), actual, amount	80,715	80,350
Total capital (to risk weighted assets), minimum for capital adequacy purposes, amount	40,570	36,788
Total capital (to risk weighted assets), minimum to be well capitalized under prompt corrective action provisions, amount	50,712	45,985
Tier One Leverage Capital [Abstract]	'	'
Tier 1 capital (to average assets), actual, amount	75,051	74,928
Tier 1 capital (to average assets), minimum for capital adequacy purposes, amount	28,297	25,827
Tier 1 capital (to average assets), minimum to be well capitalized under prompt corrective action provisions, amount	35,372	32,284
Risk Based Ratios [Abstract]	'	'
Total capital (to risk weighted assets), actual, ratio	15.90%	17.50%
Total capital (to risk weighted assets), minimum for capital adequacy purposes, ratio	8.00%	8.00%
Tier 1 capital (to risk weighted assets), actual, ratio	14.80%	16.30%
Tier 1 capital (to risk weighted assets), minimum for capital adequacy purposes, ratio	4.00%	4.00%
Total capital (to risk weighted assets), minimum to be well capitalized under prompt corrective action provisions, ratio	10.00%	10.00%
Tier 1 capital (to risk weighted assets), minimum to be well capitalized under prompt corrective action provisions, ratio	6.00%	6.00%
Leverage Ratios [Abstract]	'	'
Tier 1 capital (to average assets), actual, ratio	10.60%	11.60%
Tier 1 capital (to average assets), minimum for capital adequacy purposes, ratio	4.00%	4.00%
Tier 1 capital (to average assets), minimum to be well capitalized under prompt corrective action provisions, ratio	5.00%	5.00%
Tier One Risk Based Capital [Abstract]	'	'
Tier 1 capital (to risk weighted assets), actual, amount	75,051	74,928
Tier 1 capital (to risk weighted assets), minimum for capital adequacy purposes, amount	20,285	18,394
Tier 1 capital (to risk weighted assets), minimum to be well capitalized under prompt corrective action provisions, amount	$30,427	$27,591

Minimum_Regulatory_Capital_Req3

Minimum Regulatory Capital Requirements - Schedule of Reconciliation of Stockholders' Equity to Regulatory Capital (Detail) (USD $)	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2011
In Thousands, unless otherwise specified
Reconciliation of Stockholders' Equity to Regulatory Capital [Line Items]	'	'	'	'
Total stockholders' equity per consolidated financial statements	$87,159	$83,659	$87,160	$93,516
Holding company equity adjustment	0	'	'	'
Accumulated gains on securities available for sale, net of tax	-158	-346	'	'
Mortgage servicing rights	-79	-65	'	'
Total Tier 1 capital	86,922	83,248	'	'
Unrealized gains on securities available for sale	13	8	'	'
Allowance for loan losses	5,651	5,414	'	'
Total capital per regulatory reporting	92,586	88,670	'	'
Hampden Bank	'	'	'	'
Reconciliation of Stockholders' Equity to Regulatory Capital [Line Items]	'	'	'	'
Total stockholders' equity per consolidated financial statements	87,159	83,659	'	'
Holding company equity adjustment	-11,871	-8,320	'	'
Accumulated gains on securities available for sale, net of tax	-158	-346	'	'
Mortgage servicing rights	-79	-65	'	'
Total Tier 1 capital	75,051	74,928	'	'
Unrealized gains on securities available for sale	13	8	'	'
Allowance for loan losses	5,651	5,414	'	'
Total capital per regulatory reporting	$80,715	$80,350	'	'

Employee_Benefit_Plans_401K_Pl

Employee Benefit Plans - 401(K) Plan - Narrative (Detail) (401(K) Retirement Savings Plan, USD $)	12 Months Ended
In Thousands, unless otherwise specified	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2012
401(K) Retirement Savings Plan	'	'	'
Deferred Compensation Plans [Line Items]	'	'	'
Percentage of employee's annual compensation contributed to 401(K) retirement savings plan	3.00%	'	'
Percentage cap on employer matching contributions to a 401(k) plan	50.00%	'	'
Percentage cap on employee contributions for setting employer matching contributions to a 401(k) plan	2.00%	'	'
Deferred compensation arrangement expense	$257	$268	$220

Employee_Benefit_Plans_Supplem

Employee Benefit Plans - Supplemental Retirement Benefits - Narrative (Detail) (Supplemental Retirement Benefits, Officers and Directors, USD $)	12 Months Ended
	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2012
Supplemental Retirement Benefits | Officers and Directors	'	'	'
Deferred Compensation Plans [Line Items]	'	'	'
Supplemental retirement benefit expense	$246,000	$306,000	$382,000
Liability account for supplemental retirement agreements	$2,300,000	$3,300,000	'

Employee_Benefit_Plans_Employe

Employee Benefit Plans - Employee Stock Ownership Plan - Narrative (Detail) (USD $)	0 Months Ended	12 Months Ended
	Jan. 16, 2007	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2012
Employee Stock Ownership Plan (ESOP) Disclosures [Line Items]	'	'	'	'
Number of shares issued in the Company's initial public offering	7,949,879	'	'	'
Compensation expense, ESOP plan	'	$685,000	$613,000	$530,000
Employee Stock Ownership Plan	'	'	'	'
Employee Stock Ownership Plan (ESOP) Disclosures [Line Items]	'	'	'	'
Number of shares purchased by ESOP	635,990	'	'	'
Percentage of shares issued in the Company's initial public offering purchased by ESOP	8.00%	'	'	'
Compensation expense, ESOP plan	'	685,000	613,000	530,000
Fair value of unallocated shares	'	5,400,000	5,400,000	'
Loan from Hampden LS, Inc. | Employee Stock Ownership Plan	'	'	'	'
Employee Stock Ownership Plan (ESOP) Disclosures [Line Items]	'	'	'	'
Maturity period of loan to ESOP	'	'15 years	'	'
Principal balance payable in year ending June 30, 2015	'	399,000,000	'	'
Principal balance payable in year ending June 30, 2016	'	432,000,000	'	'
Principal balance payable in year ending June 30, 2017	'	467,000,000	'	'
Principal balance payable in year ending June 30, 2018	'	506,000,000	'	'
Principal balance payable in year ending June 30, 2019	'	548,000,000	'	'
Principal balance payable after June 30, 2020	'	$1,900,000	'	'

Employee_Benefit_Plans_Schedul

Employee Benefit Plans - Schedule of Shares Held by ESOP by Status (Detail)	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2012
Employee Stock Ownership Plan (ESOP) Disclosures [Line Items]	'	'	'
Shares held by ESOP, unallocated (in shares)	317,998	360,397	'
Employee Stock Ownership Plan	'	'	'
Employee Stock Ownership Plan (ESOP) Disclosures [Line Items]	'	'	'
Shares held by ESOP, allocated (in shares)	243,956	232,721	199,907
Shares held by ESOP, committed to be allocated (in shares)	21,200	21,200	21,200
Shares held by ESOP, unallocated (in shares)	317,998	360,397	402,796
Shares held by ESOP, total (in shares)	583,154	614,318	623,903

Equity_Incentive_Plan_Narrativ

Equity Incentive Plan - Narrative (Detail) (2008 Equity Incentive Plan, USD $)	0 Months Ended	12 Months Ended
In Thousands, except Share data, unless otherwise specified	Apr. 29, 2008	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2012
Stock Options	'	'	'	'
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]	'	'	'	'
Shares authorized for grant (in shares)	'	794,987	'	'
Stock options granted (in shares)	595,000	10,000	'	'
Share-based compensation award, maximum term	'10 years	'	'	'
Stock options, vesting period	'5 years	'	'	'
Percentage of shares vesting annually	20.00%	'	'	'
Stock options, exercise price (USD per share)	'	$16.49	'	'
Stock options available for grant under stock option plan (in shares)	'	188,987	'	'
Share-based compensation expense, stock options	'	$37	$256	$330
Recognized tax benefit related to share-based compensation	'	13	63	84
Unrecognized stock-based compensation expense related to nonvested options	'	133	'	'
Unrecognized stock-based compensation expense, recognition period	'	'3 years 3 months 15 days	'	'
Intrinsic value of stock options outstanding	'	2,484	'	'
Intrinsic value of stock options exercisable	'	2,323	'	'
Intrinsic value of stock options exercised	'	656	'	'
Stock Options | Chief Executive Officer	'	'	'	'
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]	'	'	'	'
Stock options, vesting period	'4 years	'	'	'
Percentage of shares vesting annually	25.00%	'	'	'
Stock Options | Employee	'	'	'	'
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]	'	'	'	'
Stock options granted (in shares)	'	10,000	35,000	'
Stock options, vesting period	'	'5 years	'5 years	'
Stock options, exercise price (USD per share)	'	$16.49	$12.51	'
Restricted Stock	'	'	'	'
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]	'	'	'	'
Shares authorized for grant (in shares)	'	317,996	'	'
Stock options, vesting period	'	'	'5 years	'
Recognized tax benefit related to share-based compensation	'	1	105	42
Unrecognized stock-based compensation expense, recognition period	'	'3 years 1 month 6 days	'	'
Shares granted (in shares)	'	0	3,000	'
Fair value per share at grant date	'	'	$12.51	'
Share-based compensation expense, restricted stock	'	9	247	596
Total unrecognized compensation cost related to nonvested restricted stock awards	'	8	'	'
Shares vested, aggregate fair value	'	$9	'	'
Restricted Stock | Minimum	'	'	'	'
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]	'	'	'	'
Percentage of shares vesting annually	'	20.00%	'	'
Restricted Stock | Maximum	'	'	'	'
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]	'	'	'	'
Percentage of shares vesting annually	'	25.00%	'	'

Equity_Incentive_Plan_Schedule

Equity Incentive Plan - Schedule of Valuation Assumptions for Stock Options (Detail) (2008 Equity Incentive Plan, Stock Options, USD $)	12 Months Ended
	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2012
2008 Equity Incentive Plan | Stock Options	'	'	'
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]	'	'	'
Stock option fair value assumptions, fair value per share	$4.45	$3.34	$3.44
Stock option fair value assumptions, expected dividends	1.49%	1.26%	0.94%
Stock option fair value assumptions, expected term	'6 years 6 months	'6 years 6 months	'6 years 3 months
Stock option fair value assumptions, expected volatility	26.45%	27.97%	27.97%
Stock option fair value assumptions, risk-free interest rate	2.84%	1.75%	2.19%

Equity_Incentive_Plan_Schedule1

Equity Incentive Plan - Schedule of Stock Options Outstanding and Exercisable (Detail) (2008 Equity Incentive Plan, Stock Options, USD $)	0 Months Ended	12 Months Ended
	Apr. 29, 2008	Jun. 30, 2014
2008 Equity Incentive Plan | Stock Options	'	'
Shares	'	'
Outstanding at beginning of year (in shares)	'	555,183
Granted (in shares)	595,000	10,000
Exercised (in shares)	'	-126,500
Outstanding at end of year (in shares)	'	438,683
Options exercisable at end of year (in shares)	'	393,183
Weighted Average Exercise Price per Share	'	'
Outstanding at beginning of year, weighted average exercise price per share (USD per share)	'	$11.02
Granted, weighted average exercise price per share (USD per share)	'	$16.49
Exercised, weighted average exercise price per share (USD per share)	'	$10.86
Outstanding at end of year, weighted average exercise price per share (USD per share)	'	$11.20
Options exercisable at end of year, weighted average exercise price per share (USD per share)	'	$10.95
Outstanding at end of year, weighted average remaining contractual term	'	'4 years 4 months 24 days
Options exercisable at end of year, weighted average remaining contractual term	'	'3 years 10 months 24 days

Equity_Incentive_Plan_Schedule2

Equity Incentive Plan - Schedule of Nonvested Stock Awards (Detail) (2008 Equity Incentive Plan, Restricted Stock)	12 Months Ended
	Jun. 30, 2014	Jun. 30, 2013
2008 Equity Incentive Plan | Restricted Stock	'	'
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]	'	'
Balance at beginning of year, nonvested shares (in shares)	3,000	'
Granted (in shares)	0	3,000
Vested (in shares)	-600	'
Balance at end of year, nonvested shares (in shares)	2,400	3,000

Restrictions_on_Dividends_Loan1

Restrictions on Dividends, Loans and Advances (Detail) (USD $)	Jun. 30, 2014
In Millions, unless otherwise specified
Restrictions on Dividends, Loans and Advances [Line Items]	'
Liquidation account	$4.30
Hampden Bank	'
Restrictions on Dividends, Loans and Advances [Line Items]	'
Percentage of capital stock and surplus, maximum for loans and advances to parent company	10.00%
Retained earnings of Hampden Bank available for payment of dividends	45.5
Restricted equity in net assets of Hampden Bank	29.8
Funds available for loans or advances by the Bank to the Company	$7.50

Fair_Value_of_Financial_Instru2

Fair Value of Financial Instruments - Narrative (Detail) (Fair Value, Measurements, Nonrecurring, Level 3, USD $)	12 Months Ended
	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2012
Impaired loans	'	'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'	'
Discount percentage from tax assessment for underlying collateral of impaired loans	20.00%	'	'
Discount percentage from realtor's market analysis or listing price for underlying collateral of impaired loans	10.00%	'	'
Realtor commission percentage deducted from market analysis or listing price for underlying collateral of impaired loans	5.00%	'	'
Fair value, assets measured on nonrecurring basis, loss recognized in provision for loan losses	$102,000	$103,000	'
Fair value, assets measured on nonrecurring basis, loss recognized in earnings	'	'	121,000
Other real estate owned	'	'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'	'
Fair value, assets measured on nonrecurring basis, loss recognized in provision for loan losses	$226,000	$0	$362,000

Fair_Value_of_Financial_Instru3

Fair Value of Financial Instruments - Schedule of Financial Assets Measured at Fair Value on Recurring Basis (Detail) (USD $)	Jun. 30, 2014	Jun. 30, 2013
In Thousands, unless otherwise specified
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'
Debt securities	$133,857	'
Fair Value, Measurements, Recurring	'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'
Debt securities	133,857	138,662
Marketable equity securities	79	68
Mortgage servicing rights	792	654
Total	134,728	139,384
Level 1	'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'
Mortgage servicing rights	0	0
Level 1 | Fair Value, Measurements, Recurring	'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'
Debt securities	0	0
Marketable equity securities	79	68
Mortgage servicing rights	0	0
Total	79	68
Level 2	'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'
Mortgage servicing rights	0	0
Level 2 | Fair Value, Measurements, Recurring	'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'
Debt securities	133,857	138,662
Marketable equity securities	0	0
Mortgage servicing rights	0	0
Total	133,857	138,662
Level 3	'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'
Mortgage servicing rights	792	654
Level 3 | Fair Value, Measurements, Recurring	'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'
Debt securities	0	0
Marketable equity securities	0	0
Mortgage servicing rights	792	654
Total	$792	$654

Fair_Value_of_Financial_Instru4

Fair Value of Financial Instruments - Schedule of Level 3 Assets Measured at Fair Value on Recurring Basis (Detail) (Mortgage Servicing Rights, Fair Value, Measurements, Recurring, USD $)	12 Months Ended
In Thousands, unless otherwise specified	Jun. 30, 2014	Jun. 30, 2013
Mortgage Servicing Rights | Fair Value, Measurements, Recurring	'	'
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]	'	'
Beginning balance	$654	$445
Total realized and unrealized gains included in net income	41	161
Capitalized servicing assets	97	48
Ending balance	$792	$654

Fair_Value_of_Financial_Instru5

Fair Value of Financial Instruments - Schedule of Financial Assets Measured at Fair Value on Nonrecurring Basis (Detail) (Fair Value, Measurements, Nonrecurring, Level 3, USD $)	Jun. 30, 2014	Jun. 30, 2013
In Thousands, unless otherwise specified
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'
Assets at fair value	$770	$1,513
Impaired loans	'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'
Assets at fair value	461	292
Other real estate owned	'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'
Assets at fair value	$309	$1,221

Fair_Value_of_Financial_Instru6

Fair Value of Financial Instruments - Schedule of Carrying Amounts and Estimated Fair Values of Financial Instruments (Detail) (USD $)	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2011
In Thousands, unless otherwise specified
Financial assets:	'	'	'	'
Cash and cash equivalents	$12,667	$25,618	$27,923	$31,147
Securities available for sale, at fair value	133,936	138,730	'	'
Securities held to maturity, at cost	9,302	0	'	'
Federal Home Loan Bank stock	6,648	5,092	'	'
Loans held for sale	330	1,274	'	'
Loans, net	507,635	450,347	'	'
Accrued interest receivable	1,688	1,636	'	'
Financial liabilities:	'	'	'	'
Deposits	491,732	474,798	'	'
Short-term borrowings	4,000	4,500	'	'
Long-term debt	112,446	82,492	'	'
Mortgagors' escrow accounts	1,184	1,100	'	'
Level 1	'	'	'	'
Financial assets:	'	'	'	'
Cash and cash equivalents	12,667	25,618	'	'
Securities available for sale, at fair value	79	68	'	'
Securities held to maturity, at cost	0	'	'	'
Federal Home Loan Bank stock	0	0	'	'
Loans held for sale	0	0	'	'
Loans, net	0	0	'	'
Accrued interest receivable	0	0	'	'
Mortgage servicing rights	0	0	'	'
Financial liabilities:	'	'	'	'
Deposits	0	0	'	'
Short-term borrowings	0	0	'	'
Long-term debt	0	0	'	'
Mortgagors' escrow accounts	0	0	'	'
Level 2	'	'	'	'
Financial assets:	'	'	'	'
Cash and cash equivalents	0	0	'	'
Securities available for sale, at fair value	133,857	138,662	'	'
Securities held to maturity, at cost	0	'	'	'
Federal Home Loan Bank stock	0	0	'	'
Loans held for sale	330	1,274	'	'
Loans, net	0	0	'	'
Accrued interest receivable	0	0	'	'
Mortgage servicing rights	0	0	'	'
Financial liabilities:	'	'	'	'
Deposits	0	0	'	'
Short-term borrowings	4,000	4,500	'	'
Long-term debt	113,823	82,527	'	'
Mortgagors' escrow accounts	0	0	'	'
Level 3	'	'	'	'
Financial assets:	'	'	'	'
Cash and cash equivalents	0	0	'	'
Securities available for sale, at fair value	0	0	'	'
Securities held to maturity, at cost	9,302	'	'	'
Federal Home Loan Bank stock	6,648	5,092	'	'
Loans held for sale	0	0	'	'
Loans, net	513,765	459,018	'	'
Accrued interest receivable	1,688	1,636	'	'
Mortgage servicing rights	792	654	'	'
Financial liabilities:	'	'	'	'
Deposits	493,500	477	'	'
Short-term borrowings	0	0	'	'
Long-term debt	0	0	'	'
Mortgagors' escrow accounts	1,184	1,100	'	'
Carrying Amount	'	'	'	'
Financial assets:	'	'	'	'
Cash and cash equivalents	12,667	25,618	'	'
Securities available for sale, at fair value	133,936	138,730	'	'
Securities held to maturity, at cost	9,302	'	'	'
Federal Home Loan Bank stock	6,648	5,092	'	'
Loans held for sale	330	1,274	'	'
Loans, net	507,635	450,347	'	'
Accrued interest receivable	1,688	1,636	'	'
Mortgage servicing rights	792	654	'	'
Financial liabilities:	'	'	'	'
Deposits	491,732	475	'	'
Short-term borrowings	4,000	4,500	'	'
Long-term debt	112,446	82,492	'	'
Mortgagors' escrow accounts	1,184	1,100	'	'
Fair Value	'	'	'	'
Financial assets:	'	'	'	'
Cash and cash equivalents	12,667	25,618	'	'
Securities available for sale, at fair value	133,936	138,730	'	'
Securities held to maturity, at cost	9,302	'	'	'
Federal Home Loan Bank stock	6,648	5,092	'	'
Loans held for sale	330	1,274	'	'
Loans, net	513,765	459,018	'	'
Accrued interest receivable	1,688	1,636	'	'
Mortgage servicing rights	792	654	'	'
Financial liabilities:	'	'	'	'
Deposits	493,500	477	'	'
Short-term borrowings	4,000	4,500	'	'
Long-term debt	113,823	82,527	'	'
Mortgagors' escrow accounts	$1,184	$1,100	'	'

Parent_Company_Only_Condensed_2

Parent Company Only Condensed Financial Statements - Balance Sheets (Detail) (USD $)	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2011
In Thousands, unless otherwise specified
ASSETS	'	'	'	'
Other assets	$2,673	$2,494	'	'
Total assets	701,497	652,962	'	'
LIABILITIES AND STOCKHOLDERS' EQUITY	'	'	'	'
Stockholders' equity	87,159	83,659	87,160	93,516
Total liabilities and stockholders' equity	701,497	652,962	'	'
Hampden Bancorp, Inc.	'	'	'	'
ASSETS	'	'	'	'
Cash on hand	4,920	967	'	'
Short-term investments	0	65	'	'
Cash and cash equivalents	4,920	1,032	3,435	7,873
Deferred tax asset	700	1,221	'	'
Other assets	4,257	4,305	'	'
Total assets	87,159	83,659	'	'
LIABILITIES AND STOCKHOLDERS' EQUITY	'	'	'	'
Stockholders' equity	87,159	83,659	'	'
Total liabilities and stockholders' equity	87,159	83,659	'	'
Hampden Bancorp, Inc. | Hampden Bank	'	'	'	'
ASSETS	'	'	'	'
Investment in common stock of subsidiary	75,289	75,339	'	'
Hampden Bancorp, Inc. | Hampden LS, Inc.	'	'	'	'
ASSETS	'	'	'	'
Investment in common stock of subsidiary	$1,993	$1,762	'	'

Parent_Company_Only_Condensed_3

Parent Company Only Condensed Financial Statements - Statements of Operations (Detail) (USD $)	3 Months Ended								12 Months Ended
In Thousands, unless otherwise specified	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2012	Sep. 30, 2012	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2012
Income:	'	'	'	'	'	'	'	'	'	'	'
Non-interest income	$837	$788	$911	$1,103	$986	$1,177	$1,072	$966	$3,638	$4,202	$3,240
Operating expenses	3,922	4,184	4,260	4,005	4,448	4,346	4,381	4,464	16,371	17,639	17,085
Income tax benefit	714	575	577	679	347	485	453	492	2,544	1,777	1,783
Net income	1,266	1,021	1,021	1,207	618	824	770	761	4,515	2,974	3,016
Hampden Bancorp, Inc.	'	'	'	'	'	'	'	'	'	'	'
Income:	'	'	'	'	'	'	'	'	'	'	'
Interest on securities	'	'	'	'	'	'	'	'	0	0	30
Interest on cash and short-term investments	'	'	'	'	'	'	'	'	0	3	2
Non-interest income	'	'	'	'	'	'	'	'	0	0	18
Total income	'	'	'	'	'	'	'	'	0	3	50
Operating expenses	'	'	'	'	'	'	'	'	951	1,343	1,920
Loss before income taxes and equity in undistributed net income of subsidiaries	'	'	'	'	'	'	'	'	-951	-1,340	-1,870
Income tax benefit	'	'	'	'	'	'	'	'	-250	-195	-321
Loss before equity in undistributed net income of subsidiaries	'	'	'	'	'	'	'	'	-701	-1,145	-1,549
Net income	'	'	'	'	'	'	'	'	4,515	2,974	3,016
Hampden Bancorp, Inc. | Hampden Bank	'	'	'	'	'	'	'	'	'	'	'
Income:	'	'	'	'	'	'	'	'	'	'	'
Equity in undistributed net income of subsidiary	'	'	'	'	'	'	'	'	4,986	3,878	4,320
Hampden Bancorp, Inc. | Hampden LS, Inc.	'	'	'	'	'	'	'	'	'	'	'
Income:	'	'	'	'	'	'	'	'	'	'	'
Equity in undistributed net income of subsidiary	'	'	'	'	'	'	'	'	$230	$241	$245

Parent_Company_Only_Condensed_4

Parent Company Only Condensed Financial Statements - Statements of Cash Flows (Detail) (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2012
Cash flows from operating activities:	'	'	'
Net income	$4,515	$2,974	$3,016
Adjustments to reconcile net income to net cash provided by operating activities:	'	'	'
Stock-based compensation	46	503	926
Deferred tax provision (benefit)	522	-179	1,296
Net change in:	'	'	'
Other assets	-219	1,031	-461
Accrued expenses	-1,437	539	-893
Net cash provided by operating activities	6,133	6,740	4,492
Cash flows from investing activities:	'	'	'
Sales	0	3,189	1,308
Maturities	6,626	178	1,000
Net cash provided by investing activities	-63,998	-43,297	-46,450
Cash flows from financing activities:	'	'	'
Common stock repurchased	-454	-5,271	-10,410
Payment of dividends on common stock	-1,268	-997	-820
Net cash used by financing activities	44,914	34,252	38,734
Net increase (decrease) in cash and cash equivalents	-12,951	-2,305	-3,224
Hampden Bancorp, Inc.	'	'	'
Cash flows from operating activities:	'	'	'
Net income	4,515	2,974	3,016
Adjustments to reconcile net income to net cash provided by operating activities:	'	'	'
Dividends in excess of earnings of subsidiaries	5,600	4,500	3,000
Stock-based compensation	46	503	926
Deferred tax provision (benefit)	521	-69	-30
Net change in:	'	'	'
Accrued interest receivable	0	0	9
Other assets	-429	-1,822	16
Accrued expenses	477	1,508	1,168
Net cash provided by operating activities	5,514	3,475	3,540
Cash flows from investing activities:	'	'	'
Sales	0	15	1,309
Maturities	0	0	1,933
Net cash provided by investing activities	0	15	3,242
Cash flows from financing activities:	'	'	'
Common stock repurchased	-454	-5,271	-10,410
Payment of dividends on common stock	-1,268	-997	-820
Other, net	-656	-377	-742
Net cash used by financing activities	-1,626	-5,893	-11,220
Net increase (decrease) in cash and cash equivalents	3,888	-2,403	-4,438
Cash and cash equivalents at beginning of year	1,032	3,435	7,873
Cash and cash equivalents at end of year	4,920	1,032	3,435
Hampden Bancorp, Inc. | Hampden Bank	'	'	'
Adjustments to reconcile net income to net cash provided by operating activities:	'	'	'
Equity in undistributed net income of subsidiary	-4,986	-3,878	-4,320
Hampden Bancorp, Inc. | Hampden LS, Inc.	'	'	'
Adjustments to reconcile net income to net cash provided by operating activities:	'	'	'
Equity in undistributed net income of subsidiary	-230	-241	-245
Cash flows from financing activities:	'	'	'
Payment of loan from Hampden LS, Inc.	$752	$752	$752

Quarterly_Data_Unaudited_Sched

Quarterly Data (Unaudited) - Schedule of Quarterly Financial Information (Detail) (USD $)	3 Months Ended								12 Months Ended
In Thousands, except Share data, unless otherwise specified	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2012	Sep. 30, 2012	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2012
Quarterly Financial Information Disclosure [Abstract]	'	'	'	'	'	'	'	'	'	'	'
Interest and dividend income	$6,501	$6,434	$6,428	$6,149	$6,094	$5,924	$6,121	$6,209	$25,512	$24,348	$24,833
Interest expense	1,286	1,292	1,331	1,261	1,317	1,346	1,414	1,408	5,170	5,485	5,764
Net interest income	5,215	5,142	5,097	4,888	4,777	4,578	4,707	4,801	20,342	18,863	19,069
Provision for loan losses	150	150	150	100	350	100	175	50	550	675	425
Non-interest income	837	788	911	1,103	986	1,177	1,072	966	3,638	4,202	3,240
Non-interest expense	3,922	4,184	4,260	4,005	4,448	4,346	4,381	4,464	16,371	17,639	17,085
Provision for income taxes	714	575	577	679	347	485	453	492	2,544	1,777	1,783
Net income	$1,266	$1,021	$1,021	$1,207	$618	$824	$770	$761	$4,515	$2,974	$3,016
Basic earnings per share (in shares)	$0.24	$0.19	$0.19	$0.23	$0.12	$0.15	$0.14	$0.14	$0.85	$0.55	$0.52
Diluted earnings per share (in shares)	$0.23	$0.19	$0.19	$0.22	$0.11	$0.15	$0.14	$0.14	$0.83	$0.54	$0.51
Weighted average shares outstanding:	'	'	'	'	'	'	'	'	'	'	'
Basic (in shares)	5,327,928	5,313,484	5,300,289	5,274,900	5,372,849	5,389,400	5,401,349	5,495,803	5,304,151	5,414,851	5,806,977
Diluted (in shares)	5,458,803	5,439,177	5,443,078	5,401,982	5,519,703	5,560,481	5,527,472	5,584,946	5,435,761	5,548,151	5,888,591

Subsequent_Events_Details

Subsequent Events (Details) (USD $)	12 Months Ended			0 Months Ended
In Thousands, except Share data, unless otherwise specified	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2012	Sep. 10, 2014	Aug. 05, 2014
				Subsequent Event	Subsequent Event
Subsequent Event [Line Items]	'	'	'	'	'
Cash dividend per common share (USD per share)	'	'	'	'	$0.08
Common stock repurchased (in shares)	'	'	'	-122,700	'
Common stock repurchased	($454)	($5,271)	($10,410)	($2,100)	'
Treasury stock, average cost per share (USD per share)	'	'	'	$17	'