Accounts Notes Loans And Financing Receivable By Receivable Type [Axis] Receivable Type [Axis] Accounts Payable And Accrued Liabilities Current And Noncurrent Accrued expenses and other liabilities Accretion Amortization Of Discounts And Premiums Investments Net amortization of securities Accumulated Other Comprehensive Income Loss Net Of Tax Accumulated other comprehensive income Accumulated Other Comprehensive Income [Member] Accumulated Other Comprehensive Income Additional Paid In Capital Common Stock Additional paid-in-capital Additional Paid In Capital [Member] Additional Paid-in Capital Adjustments To Additional Paid In Capital Tax Effect From Share Based Compensation Tax benefit from Equity Incentive Plan vesting Adjustments To Reconcile Net Income Loss To Cash Provided By Used In Operating Activities [Abstract] Adjustments to reconcile net income to net cash provided by (used in) operating activities: Advance Payments By Borrowers For Taxes And Insurance Mortgagors' escrow accounts Advertising Expense Advertising Agency Residential Mortgage Backed Securities [Member] Agency Residential Mortgage Backed Securities [Member] Agency residential mortgage-backed securities [Member] Allowance For Credit Losses On Financing Receivables Table [Text Block] Schedule of Allowance for Loan Losses Amendment Flag Amendment Flag Amortization Of E S O P Award ESOP shares allocated or committed to be allocated Assets Total assets Assets [Abstract] ASSETS Assets Fair Value Disclosure Assets at fair value Total assets measured at fair value on a recurring basis Automobile And Other Secured Loan [Member] Automobile And Other Secured Loan [Member] Automobile and Other Secured Loans [Member] Available For Sale Debt Securities Amortized Cost Basis Securities available for sale - Debt securities - Amortized cost Available For Sale Equity Securities Amortized Cost Basis Securities available for sale - Equity securities - Amortized cost Available For Sale Securities Securities available for sale Securities available for sale - Fair value Securities available for sale, at fair value Available For Sale Securities Amortized Cost Securities available for sale - Amortized cost Availableforsale Securities Continuous Unrealized Loss Position 12 Months Or Longer Aggregate Losses 2 Securities available for sale - Continuous unrealized loss position, over 12 months - Gross unrealized losses Availableforsale Securities Continuous Unrealized Loss Position Aggregate Losses 2 Securities available for sale - Continuous unrealized loss - Gross unrealized losses This item represents the aggregate amortized cost of investments in debt and equity securities in an unrealized loss position which are categorized neither as held-to-maturity nor trading securities. Available For Sale Securities Continuous Unrealized Loss Position Amortized Cost Amortized cost of securities with unrealized losses Available For Sale Securities Continuous Unrealized Loss Position Fair Value Fair value of securities with unrealized losses Securities available for sale - Continuous unrealized loss position - Fair value Availableforsale Securities Continuous Unrealized Loss Position Less Than 12 Months Aggregate Losses 2 Securities available for sale - Continuous unrealized loss position, less than 12 months - Gross unrealized losses Available For Sale Securities Continuous Unrealized Loss Position Less Than Twelve Months Fair Value Securities available for sale - Continuous unrealized loss position, less than 12 months - Fair value Available For Sale Securities Continuous Unrealized Loss Position Twelve Months Or Longer Fair Value Securities available for sale - Continuous unrealized loss position, over 12 months - Fair value Available For Sale Securities Debt Maturities After One Through Five Years Amortized Cost Securities available for sale, due over 1 year through 5 years - Amortized cost Available For Sale Securities Debt Maturities After One Through Five Years Fair Value Securities available for sale, due over 1 year through 5 years - Fair value Available For Sale Securities Debt Maturities Within One Year Amortized Cost Securities available for sale, due within 1 year - Amortized cost Available For Sale Securities Debt Maturities Within One Year Fair Value Securities available for sale, due within 1 year - Fair value Available For Sale Securities Debt Securities Debt securities Securities available for sale - Debt securities - Fair value Securities available for sale - Debt securities - Fair value Available For Sale Securities Equity Securities Marketable equity securities Securities available for sale - Equity securities - Fair value Availableforsale Securities Gross Unrealized Gain Securities available for sale - Gross unrealized gains Available For Sale Securities Gross Unrealized Losses 1 Securities available for sale - Gross unrealized losses Available For Sale Securities In Unrealized Loss Positions Qualitative Disclosure Number Of Positions Number of securities with unrealized losses Award Type [Axis] Award Type [Axis] Balance Sheet Location [Axis] Balance Sheet Location [Axis] Balance Sheet Location [Domain] Balance Sheet Location [Domain] Bank Owned Life Insurance Bank-owned life insurance Bank Owned Life Insurance Income Increase in cash surrender value of bank-owned life insurance Increase in cash surrender value of bank-owned life insurance The aggregate amount of cash reserve accounts, funded by the loan broker, which are available for prepayments and losses on manufactured home loans. Broker Funded Cash Reserve Accounts Manufactured Home Loans Broker funded cash reserve accounts Carrying Reported Amount Fair Value Disclosure [Member] Carrying Amount [Member] Cash And Cash Equivalents Period Increase Decrease Net change in cash and cash equivalents Cash And Due From Banks Cash and due from banks Cash Cash Equivalents And Federal Funds Sold Cash and cash equivalents at end of period Cash and cash equivalents at beginning of period Cash and cash equivalents Cash and cash equivalents Class Of Stock [Line Items] Class of Stock [Line Items] Commercial Loan [Member] Other Commercial Loans [Member] Commercial Real Estate and Commercial Loans [Member] Commercial Real Estate And Commercial Loans [Member] Commercial Real Estate and Commercial Loans [Member] Commercial Real Estate Construction Financing Receivable [Member] Commercial Construction Loans [Member] Commercial Real Estate Other Receivable [Member] Commercial Real Estate Loans [Member] Commitments And Contingencies Commitments and contingencies Commitments And Contingencies Disclosure [Text Block] Loan Commitments Common Stock Dividends Per Share Cash Paid Cash dividends paid, per share Common dividend paid, per share Common Stock Dividends Per Share Declared Common dividend declared, per share Common Stock [Member] Common Stock Common Stock Par Or Stated Value Per Share Common stock, par value Common Stock Shares Authorized Common stock, shares authorized Common Stock Shares Issued Common stock, issued Common Stock Shares Outstanding Common stock, outstanding Common Stock Value Common stock ($.01 par value, 25,000,000 shares authorized; 7,951,548 issued; 5,860,605 outstanding at September 30, 2012 and 5,968,395 outstanding at June 30, 2012) Comprehensive Income Net Of Tax Comprehensive income Corporate Debt Securities [Member] Corporate bonds [Member] Current Fiscal Year End Date Current Fiscal Year End Date The term over which the debt instrument is scheduled to be fully repaid. Debt Instrument Maturity Term Maturity period of loan to ESOP Debt Securities [Member] Debt securities [Member] Deferred Compensation Equity Unearned compensation - equity incentive plan Deferred Compensation Share Based Payments [Member] Unearned Compensation - Equity Incentive Plan Deferred Finance Costs Net Net deferred loan costs Deferred Income Tax Expense Benefit Deferred tax benefit Deferred Tax Assets Liabilities Net Deferred tax asset, net Deposits Deposits Deposits, carrying value Deposits Fair Value Disclosure Deposits, fair value Depreciation Amortization And Accretion Net Depreciation and amortization Disclosure - Basis of Presentation and Consolidation [Abstract] Disclosure Basis Of Presentation And Consolidation [Abstract] Disclosure - Basis of Presentation and Consolidation [Abstract] Disclosure - Dividends [Abstract] Disclosure Dividends [Abstract] Disclosure - Dividends [Abstract] Disclosure - Earnings Per Share [Abstract] Disclosure Earnings Per Share [Abstract] Disclosure - Earnings Per Share [Abstract] Disclosure - Equity Incentive Plan [Abstract] Disclosure Equity Incentive Plan [Abstract] Disclosure - Equity Incentive Plan [Abstract] Disclosure - Fair Value of Assets and Liabilities - Narrative [Abstract] Disclosure Fair Value Of Assets And Liabilities Narrative [Abstract] Disclosure - Fair Value of Assets and Liabilities - Narrative [Abstract] Disclosure - Fair Value of Assets and Liabilities - Schedule of Carrying Amounts and Estimated Fair Values of Financial Instruments [Abstract] Disclosure Fair Value Of Assets And Liabilities Schedule Of Carrying Amounts And Estimated Fair Values Of Financial Instruments [Abstract] Disclosure - Fair Value of Assets and Liabilities - Schedule of Carrying Amounts and Estimated Fair Values of Financial Instruments [Abstract] Disclosure - Fair Value of Assets and Liabilities - Schedule of Financial Assets Measured at Fair Value on Nonrecurring Basis [Abstract] Disclosure Fair Value Of Assets And Liabilities Schedule Of Financial Assets Measured At Fair Value On Nonrecurring Basis [Abstract] Disclosure - Fair Value of Assets and Liabilities - Schedule of Financial Assets Measured at Fair Value on Nonrecurring Basis [Abstract] Disclosure - Fair Value of Assets and Liabilities - Schedule of Financial Assets Measured at Fair Value on Recurring Basis [Abstract] Disclosure Fair Value Of Assets And Liabilities Schedule Of Financial Assets Measured At Fair Value On Recurring Basis [Abstract] Disclosure - Fair Value of Assets and Liabilities - Schedule of Financial Assets Measured at Fair Value on Recurring Basis [Abstract] Disclosure - Fair Value of Assets and Liabilities - Schedule of Level 3 Assets Measured at Fair Value on Recurring Basis [Abstract] Disclosure Fair Value Of Assets And Liabilities Schedule Of Level 3 Assets Measured At Fair Value On Recurring Basis [Abstract] Disclosure - Fair Value of Assets and Liabilities - Schedule of Level 3 Assets Measured at Fair Value on Recurring Basis [Abstract] Disclosure - Loan Commitments [Abstract] Disclosure Loan Commitments [Abstract] Disclosure - Loan Commitments [Abstract] Disclosure - Loans - Narrative [Abstract] Disclosure Loans Narrative [Abstract] Disclosure - Loans - Narrative [Abstract] Disclosure - Loans - Schedule of Allowance for Loan Losses [Abstract] Disclosure Loans Schedule Of Allowance For Loan Losses [Abstract] Disclosure - Loans - Schedule of Allowance for Loan Losses [Abstract] Disclosure - Loans - Schedule of Impaired Loans, Average Recorded Investment and Interest Income Recognized [Abstract] Disclosure Loans Schedule Of Impaired Loans Average Recorded Investment And Interest Income Recognized [Abstract] Disclosure - Loans - Schedule of Impaired Loans, Average Recorded Investment and Interest Income Recognized [Abstract] Disclosure - Loans - Schedule of Impaired Loans by Category [Abstract] Disclosure Loans Schedule Of Impaired Loans By Category [Abstract] Disclosure - Loans - Schedule of Impaired Loans by Category [Abstract] Disclosure - Loans - Schedule of Loan Balances [Abstract] Disclosure Loans Schedule Of Loan Balances [Abstract] Disclosure - Loans - Schedule of Loan Balances [Abstract] Disclosure - Loans - Schedule of Loans by Risk Rating [Abstract] Disclosure Loans Schedule Of Loans By Risk Rating [Abstract] Disclosure - Loans - Schedule of Loans by Risk Rating [Abstract] Disclosure - Loans - Schedule of Past Due and Non-Accrual Loans [Abstract] Disclosure Loans Schedule Of Past Due And Non Accrual Loans [Abstract] Disclosure - Loans - Schedule of Past Due and Non-Accrual Loans [Abstract] Disclosure - Loans - Troubled Debt Restructurings - Narrative [Abstract] Disclosure Loans Troubled Debt Restructurings Narrative [Abstract] Disclosure - Loans - Troubled Debt Restructurings - Narrative [Abstract] Disclosure Of Compensation Related Costs Share Based Payments [Text Block] Equity Incentive Plan Disclosure - Securities Available For Sale - Narrative [Abstract] Disclosure Securities Available For Sale Narrative [Abstract] Disclosure - Securities Available For Sale - Narrative [Abstract] Disclosure - Securities Available For Sale - Schedule of Amortized Cost and Estimated Fair Value [Abstract] Disclosure Securities Available For Sale Schedule Of Amortized Cost And Estimated Fair Value [Abstract] Disclosure - Securities Available For Sale - Schedule of Amortized Cost and Estimated Fair Value [Abstract] Disclosure - Securities Available For Sale - Schedule of Debt Securities by Contractual Maturity [Abstract] Disclosure Securities Available For Sale Schedule Of Debt Securities By Contractual Maturity [Abstract] Disclosure - Securities Available For Sale - Schedule of Debt Securities by Contractual Maturity [Abstract] Disclosure - Securities Available For Sale - Schedule of Securities with Gross Unrealized Losses [Abstract] Disclosure Securities Available For Sale Schedule Of Securities With Gross Unrealized Losses [Abstract] Disclosure - Securities Available For Sale - Schedule of Securities with Gross Unrealized Losses [Abstract] Dividend Declared [Member] Dividend Declared [Member] Dividend Income Operating Dividends Dividend Payable Date To Be Paid Day Month And Year Common dividend date payable Dividends Common Stock Cash Cash dividends paid Dividends Payable Date Of Record Day Month And Year Common dividend date of record Document - Document and Entity Information [Abstract] Document Documentand Entity Information [Abstract] Document - Document and Entity Information [Abstract] Document Fiscal Period Focus Document Fiscal Period Focus Document Fiscal Year Focus Document Fiscal Year Focus Document Period End Date Document Period End Date Document Type Document Type Doubtful [Member] Loans rated 8 [Member] Earnings Per Share [Abstract] Earnings per share Earnings Per Share Basic Basic (dollars per share) Basic earnings per share Earnings Per Share Diluted Diluted (dollars per share) Diluted earnings per share Earnings Per Share Diluted [Line Items] Earnings Per Share, Diluted, by Common Class, Including Two Class Method [Line Items] Earnings Per Share [Text Block] Earnings Per Share Employee Service Share Based Compensation Nonvested Awards Total Compensation Cost Not Yet Recognized Share Based Awards Other Than Options Total unrecognized compensation cost related to nonvested restricted stock awards Employee Service Share Based Compensation Nonvested Awards Total Compensation Cost Not Yet Recognized Stock Options Unrecognized stock-based compensation expense related to nonvested options Employee Stock Ownership Plan E S O P Compensation Expense Employee Stock Ownership Plan expense The number of shares in an ESOP trust that have been allocated or committed to be allocated to individual participant accounts during the reporting period. Employee Stock Ownership Plan E S O P Number Of Shares Allocated Or Committed To Be Allocated ESOP shares allocated or committed to be allocated, shares Employee Stock Ownership Plan E S O P Number Of Suspense Shares Unearned compensation - ESOP, shares unallocated Employee Stock Ownership Plan (ESOP), Plan [Member] Employee Stock Ownership Plan E S O P Plan [Member] Unearned Compensation - ESOP Entity Central Index Key Entity Central Index Key Entity Common Stock Shares Outstanding Entity Common Stock, Shares Outstanding Entity [Domain] Entity [Domain] Entity Filer Category Entity Filer Category Entity Registrant Name Entity Registrant Name Equity Component [Domain] Equity Component [Domain] Equity Incentive Plan 2008 [Member] Equity Incentive Plan 2008 [Member] 2008 Equity Incentive Plan [Member] Equity Securities [Member] Marketable equity securities [Member] Estimate Of Fair Value Fair Value Disclosure [Member] Fair Value [Member] Excess Tax Benefit From Share Based Compensation Financing Activities Tax benefit from Equity Incentive Plan vesting Excess Tax Benefit From Share Based Compensation Operating Activities Tax benefit from Equity Incentive Plan vesting Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items] Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Table] Fair Value Measurements, Recurring and Nonrecurring [Table] This item represents the amount of the total realized and unrealized gains or losses for the period which are included in the statement of income. Fair Value Assets Measured On Nonrecurring Basis Gain Loss Fair value, assets measured on nonrecurring basis, gain (loss) recognized in earnings Fair Value Assets Measured On Nonrecurring Basis [Text Block] Schedule of Financial Assets Measured at Fair Value on Nonrecurring Basis Fair Value Assets Measured On Recurring Basis [Text Block] Schedule of Financial Assets Measured at Fair Value on Recurring Basis Fair Value Assets Measured On Recurring Basis Unobservable Input Reconciliation By Asset Class [Domain] Fair Value by Asset Class [Domain] Fair Value Assets Measured On Recurring Basis Unobservable Input Reconciliation [Line Items] Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items] Fair Value Assets Measured On Recurring Basis Unobservable Input Reconciliation [Table] Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Table] Fair Value Assets Measured On Recurring Basis Unobservable Input Reconciliation [Text Block] Schedule of Level 3 Assets Measured at Fair Value on Recurring Basis Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items] Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] Fair Value By Asset Class [Axis] Asset Class [Axis] Fair Value By Balance Sheet Grouping Disclosure Item Amounts [Axis] Fair Value, by Balance Sheet Grouping, Disclosure Item Amounts [Axis] Fair Value By Balance Sheet Grouping [Table] Fair Value, by Balance Sheet Grouping [Table] Fair Value By Balance Sheet Grouping [Text Block] Schedule of Carrying Amounts and Estimated Fair Values of Financial Instruments Fair Value By Fair Value Hierarchy Level [Axis] Fair Value, Hierarchy [Axis] Fair Value By Measurement Frequency [Axis] Measurement Frequency [Axis] Fair Value Disclosure Item Amounts [Domain] Fair Value, Disclosure Item Amounts [Domain] Fair Value Disclosure Offbalance Sheet Risks Amount Liability Outstanding loan commitments Fair Value Disclosures [Text Block] Fair Value of Assets and Liabilities Fair Value Inputs Level 1 [Member] Level 1 [Member] Fair Value Inputs Level 2 [Member] Level 2 [Member] Fair Value Inputs Level 3 [Member] Level 3 [Member] Fair Value Measurement Frequency [Domain] Fair Value, Measurement Frequency [Domain] Fair Value Measurements Fair Value Hierarchy [Domain] Fair Value, Measurements, Fair Value Hierarchy [Domain] Fair Value Measurements Nonrecurring [Member] Fair Value, Measurements, Nonrecurring [Member] Fair Value Measurements Recurring [Member] Fair Value, Measurements, Recurring [Member] Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Asset Gain Loss Included In Earnings 1 Total realized and unrealized gains (losses) included in net income Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Asset Gain Loss Included In Other Comprehensive Income Loss Total unrealized gains (losses) included in other comprehensive income Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Asset Purchases Sales Issuances Settlements Capitalized servicing assets Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Asset Transfers Net Transfers in and/or out of Level 3 Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Asset Value Ending balance Beginning balance Fair Value Off Balance Sheet Risks Disclosure Information [Line Items] Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items] Fair Value Of Financial Instruments Policy Determination of Fair Value Federal Deposit Insurance Corporation Premium Expense FDIC insurance and assessment The amount outstanding of funds lent to other depository institutions, securities brokers, or securities dealers in the form of Federal Funds sold; for example, immediately available funds lent under agreements or contracts that mature in one business day or roll over under a continuing contract, regardless of the nature of the transaction or the collateral involved, excluding overnight lending for commercial and industrial purposes. Also include Federal Funds sold under agreements to resell on a gross basis, excluding (1) sales of term Federal Funds, (2) due bills representing purchases of securities or other assets by the reporting bank that have not yet been delivered and similar instruments, (3) resale agreements that mature in more than one business day involving assets other than securities, and (4) yield maintenance dollar repurchase agreements. Also includes other investments not otherwise specified in the taxonomy that will be realized in a short period of time, usually less than one year or the normal operating cycle, whichever is longer. Federal Funds Sold And Other Short Term Investments Federal funds sold and other short-term investments Federal Home Loan Bank Stock Federal Home Loan Bank of Boston stock, at cost Federal Home Loan Bank stock Fees And Commissions Depositor Accounts Customer service fees Financial Instrument [Axis] Financial Instrument [Axis] Financial Instruments Financial Assets Balance Sheet Groupings [Abstract] Financial assets: Financial Instruments Financial Liabilities Balance Sheet Groupings [Abstract] Financial liabilities: Financing Receivable Allowance For Credit Losses Collectively Evaluated For Impairment Ending balance: General allocation Financing Receivable Allowance For Credit Losses Individually Evaluated For Impairment 1 Ending balance: Specific allocation Financing Receivable Allowance For Credit Losses [Line Items] Financing Receivable, Allowance for Credit Losses [Line Items] Financing Receivable Allowance For Credit Losses Recovery Recoveries Financing Receivable Allowance For Credit Losses [Roll Forward] Allowance: Financing Receivable Allowance For Credit Losses Write Offs Charge-offs Financing Receivable By Credit Quality Indicator [Domain] Financing Receivable, by Credit Quality Indicator [Domain] Financing Receivable Collectively Evaluated For Impairment Ending balance: Non-impaired loans Financing Receivable Credit Quality Indicators Table [Text Block] Schedule of Loans by Risk Rating Financing Receivable Impaired [Line Items] Financing Receivable, Impaired [Line Items] Financing Receivable Individually Evaluated For Impairment Ending balance: Impaired loans Financing Receivable Information By Credit Quality Indicator [Axis] Credit Quality Indicator [Axis] Financing Receivable Modifications [Line Items] Financing Receivable, Modifications [Line Items] Financing Receivable Modifications Post Modification Recorded Investment 1 Post-modification carrying value of loan Financing Receivable Recorded Investment 30 To 59 Days Past Due 30-59 Days Past Due Financing Receivable Recorded Investment 60 To 89 Days Past Due 60-89 Days Past Due Financing Receivable Recorded Investment 90 Days Past Due And Still Accruing Past Due 90 Days or More and Still Accruing Financing Receivable Recorded Investment Equal To Greater Than 90 Days Past Due 90 Days or Greater Past Due Financing Receivable Recorded Investment [Line Items] Financing Receivable, Recorded Investment [Line Items] Financing Receivable Recorded Investment Past Due Total Past Due Financing Receivable Recorded Investment Past Due [Line Items] Financing Receivable, Recorded Investment, Past Due [Line Items] Financing Receivable Troubled Debt Restructuring [Axis] Financing Receivable, Troubled Debt Restructuring [Axis] Financing Receivable Troubled Debt Restructuring [Domain] Financing Receivable, Troubled Debt Restructuring [Domain] First Mortgage [Member] First Lien [Member] Gain Loss On Sales Of Loans Net Gain on sales of loans, net Gain on sales of loans, net The net gain resulting from sales of other real estate owned. Gain On Sales Of Other Real Estate Realized gain on sale of other real estate owned Gains Losses On Sales Of Other Real Estate Net gain on other real estate owned Gross unrealized loss as a percentage of amortized cost of available-for-sale securities. Gross Unrealized Loss Percentage Of Amortized Cost Available For Sale Securities Aggregate depreciation percentage from amortized cost basis Hampden Bank [Member] Hampden Bank [Member] Hampden Bank [Member] Hampden LS, Inc [Member] Hampden L S Inc [Member] Hampden LS, Inc. [Member] Home Equity [Member] Home Equity Lines of Credit [Member] Impaired Financing Receivable Average Recorded Investment Average investment in impaired loans Impaired Financing Receivable Interest Income Accrual Method Interest income recognized on impaired loans Impaired Financing Receivable Interest Income Cash Basis Method Interest income recognized on a cash basis on impaired loans Impaired Financing Receivable Recorded Investment Impaired loans, recorded investment Total impaired loans, recorded investment Impaired Financing Receivable Related Allowance Impaired loans with a valuation allowance, related allowance Impaired Financing Receivables Table [Text Block] Schedule of Impaired Loans by Category Impaired Financing Receivable Unpaid Principal Balance Total impaired loans, unpaid principal balance Impaired Financing Receivable With No Related Allowance Recorded Investment Impaired loans without a valuation allowance, recorded investment Impaired Financing Receivable With No Related Allowance Unpaid Principal Balance Impaired loans without a valuation allowance, unpaid principal balance Impaired Financing Receivable With Related Allowance Recorded Investment Impaired loans with a valuation allowance, recorded investment Impaired Financing Receivable With Related Allowance Unpaid Principal Balance Impaired loans with a valuation allowance, unpaid principal balance Impaired Loans [Member] Impaired Loans [Member] Impaired Loans [Member] Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest Income before income taxes Income Statement [Abstract] Income Statement [Abstract] Income Taxes Paid Income taxes paid Income Tax Expense Benefit Income tax provision Increase Decrease In Accrued Interest Receivable Net Accrued interest receivable Increase Decrease In Accrued Liabilities And Other Operating Liabilities Accrued expenses and other liabilities Increase Decrease In Deposits Net change in deposits The net cash inflow (outflow) for the net change associated with funds held in escrow. Increase Decrease In Escrow Deposit Net change in mortgagors' escrow accounts The net increase or decrease in the gross carrying amount of the loan portfolio. Increase Decrease In Loans Receivable Gross Carrying Amount Change in loan portfolio Increase Decrease In Operating Capital [Abstract] Net change in: Increase Decrease In Other Operating Assets Other assets Incremental Common Shares Attributable To Share Based Payment Arrangements Plus: dilutive shares attributable to share-based payments Information Technology And Data Processing Data processing services Interest And Dividend Income Operating Total interest and dividend income Interest And Dividend Income Operating [Abstract] Interest and dividend income: Interest And Fee Income Loans And Leases Loans, including fees Interest Expense Total interest expense Interest Expense [Abstract] Interest expense: Interest Expense Borrowings Borrowings Interest Expense Deposits Deposits Represents interest income, including any amortization and accretion (as applicable) of discounts and premiums, derived from debt securities. Interest Income Available For Sale Securities Debt Debt securities Interest Income Expense After Provision For Loan Loss Net interest income, after provision for loan losses Interest Income Expense Net Net interest income Interest income on federal funds sold and all other interest income from highly liquid short-term investments, net of discount accretion and premium amortization. Federal funds sold represent the excess federal funds held by one commercial bank which it lends to another commercial bank, usually at an agreed-upon (federal funds) rate of interest. Such loans are made for legal reserve requirement purposes of the borrowing bank and generally are of short-duration (overnight). Interest Income Federal Funds Sold And Other Interest Income Federal funds sold and other short-term investments Interest Paid Net Interest paid on deposits The amount of cash paid for interest on borrowings during the period net of cash paid for interest that is capitalized. Interest Paid Net Borrowings Interest paid on borrowings Interest Receivable Accrued interest receivable Investment Issuer [Axis] Investment Issuer [Axis] Investment Issuer [Domain] Investment Issuer [Domain] Investments By Secondary Categorization [Domain] Investments by Secondary Categorization [Domain] Investments Classified By Contractual Maturity Date Table [Text Block] Schedule of Debt Securities by Contractual Maturity Investment Secondary Categorization [Axis] Investment Secondary Categorization [Axis] Investments In Debt And Marketable Equity Securities And Certain Trading Assets Disclosure [Text Block] Securities Available For Sale Investment Type [Axis] Investment Type [Axis] Investment Type Categorization [Member] Investment Type Categorization [Domain] Labor And Related Expense Salaries and employee benefits Legal Entity [Axis] Legal Entity [Axis] Liabilities Total liabilities Liabilities And Stockholders Equity Total liabilities and stockholders' equity Liabilities And Stockholders Equity [Abstract] LIABILITIES AND STOCKHOLDERS' EQUITY The loan amortization period for lines-of-credit that have converted to term loans. Line Of Credit Converted To Term Loan Amortization Period Lines-of-credit converted to term loans, amortization period Contractual range of the draw period for lines-of-credit. Line Of Credit Draw Period Contractual time period of availability for lines-of-credit to be drawn upon Loans And Leases Receivable Allowance Ending balance Beginning balance Loans, allowance for loan losses Allowance for loan losses Loans And Leases Receivable Allowance For Loan Losses Policy Allowance for Loan Losses Loans And Leases Receivable Consumer Construction Ending balance Residential construction loans Loans And Leases Receivable Consumer Mortgage 1-4 family residential mortgage loans Ending balance Loans And Leases Receivable Consumer Other Ending balance Other consumer loans Loans And Leases Receivable Gross Carrying Amount Ending balance Total loans Loans And Leases Receivable Gross Carrying Amount [Abstract] Loans: Loans And Leases Receivable Impaired Nonperforming Accrual Of Interest Impaired loans, accruing troubled debt restructured loans Loans And Leases Receivable Impaired Nonperforming Nonaccrual Of Interest Impaired loans, non-accrual Loans on Non-accrual Loans And Leases Receivable Net Reported Amount Loans, net of allowance for loan losses of $5,172 at September 30, 2012 and $5,148 at June 30, 2012 Total loans, net Loans, net, carrying value Loans And Leases Receivable Other Total other loans Loans Notes Trade And Other Receivables Disclosure [Text Block] Loans Loans Receivable Commercial Construction Commercial construction loans Ending balance Loans Receivable Commercial Mortgage Commercial real estate mortgage loans Ending balance The gross amount of other commercial loans not separately disclosed. Loans Receivable Commercial Other Other commercial loans Commercial loans Ending balance Gross carrying amount under revolving lines of credit and term loans collateralized by equity in the borrower's residential property. Loans Receivable Consumer Home Equity Lines Of Credit And Home Equity Term Loans Ending balance Home equity loans Loans Receivable Fair Value Disclosure Loans, net, fair value Loans Receivable Held For Sale Net Loans held for sale Reflects the unfunded portion of contractual agreements to lend funds to borrowers for loans where it is probable that the company will be unable to collect the scheduled payments of principal or interest when due according to the contractual terms of the loan agreement. Loans Receivable Impaired Commitment To Lend Impaired loans, amount committed to be advanced The amount of the investment in impaired loans that are current with all payment terms. Loans Receivable Impaired Current With Payment Terms Impaired loans, current with payment terms The amount of the investment in impaired loans for which the Company believes based on current information and events it is probable that the Company will be unable to collect the scheduled payments of principal or interest when due according to the contractual terms of the loan agreement. Loans Receivable Impaired Unlikely To Collect Payments When Due Impaired loans, unlikely to collect scheduled payments when due The gross amount of loans that are secured by real estate mortgages. Loans Receivable Real Estate Mortgage Loans Total mortgage loans on real estate The maximum ratio of loan value to the fair value of the collateral when a loan is originated. Loan To Value Ratio Maximum At Time Of Origination Maximum loan-to-value ratio at time of origination Long Term Debt Long-term debt Long-term debt, carrying value Long Term Debt Fair Value Long-term debt, fair value Major Types Of Debt And Equity Securities [Axis] Major Types of Debt and Equity Securities [Axis] Major Types Of Debt And Equity Securities [Domain] Major Types of Debt and Equity Securities [Domain] Manufactured Home Loan [Member] Manufactured Home Loan [Member] Manufactured Home Loans [Member] Maximum [Member] Maximum [Member] Minimum [Member] Minimum [Member] Mortgage Loans On Real Estate Description Loan Category [Axis] Mortgage Loans on Real Estate, Description, Loan Category [Axis] Mortgage Loans On Real Estate Loan Category [Domain] Mortgage Loans on Real Estate, Loan Category [Domain] Mortgage Loans On Real Estate [Member] Mortgage Loans on Real Estate [Member] Mortgage Servicing Rights [Member] Mortgage Servicing Rights [Member] Mortgage Servicing Rights [Member] Mortgage Servicing Rights M S R Impairment Recovery Changes in fair value of mortgage servicing rights Net Cash Provided By Used In Financing Activities Continuing Operations Net cash provided by (used in) financing activities Net Cash Provided By Used In Financing Activities Continuing Operations [Abstract] Cash flows from financing activities: Net Cash Provided By Used In Investing Activities Continuing Operations Net cash (used in) provided by investing activities Net Cash Provided By Used In Investing Activities Continuing Operations [Abstract] Cash flows from investing activities: Net Cash Provided By Used In Operating Activities Continuing Operations Net cash provided by (used in) operating activities Net Cash Provided By Used In Operating Activities Continuing Operations [Abstract] Cash flows from operating activities: Net Income Loss Net income Net income Net income applicable to common stock New Accounting Pronouncements And Changes In Accounting Principles [Text Block] Recent Accounting Pronouncements New Accounting Pronouncements Policy Policy [Text Block] Recent Accounting Pronouncements Non-Agency Residential Mortgage Backed Securities [Member] Non Agency Residential Mortgage Backed Securities [Member] Non-agency residential mortgage-backed securities [Member] Noninterest Expense Total non-interest expense Noninterest Expense [Abstract] Non-interest expense: Noninterest Income Total non-interest income Noninterest Income [Abstract] Non-interest income: Noninterest Income Other Other Number of days principal and interest payments must be past due to trigger loan impairment and non-accrual status, unless the loan is well-secured and in process of collection. Number Of Days Past Due To Trigger Loan Impairment And Nonaccrual Status Number of days past due to trigger loan impairment and non-accrual status The number of impaired loans with commitments to lend held by the company. Number Of Impaired Loans With Commitments To Lend Number of performing impaired loans with future funding commitments Number of loans included in a troubled debt restructuring loan relationship with payment defaults during the reporting period. Number Of Loans Included In Troubled Debt Restructuring Loan Relationship With Payment Defaults During Period Number of loans included in troubled debt restructuring loan relationship with payment defaults The number of new troubled debt restructuring loan relationships that arose during the reporting period. Number Of New Troubled Debt Restructuring Loan Relationships During Period Number of new troubled debt restructuring loan relationships The number of subsidiaries wholly owned by the entity. Number Of Subsidiaries Owned Number of subsidiaries owned by Hampden Bank Number of troubled debt restructuring loan relationships with payment defaults during the reporting period. Number Of Troubled Debt Restructuring Loan Relationships With Payment Defaults During Period Number of troubled debt restructuring relationships with payment defaults Amount of net occupancy expense that may include items, such as depreciation of facilities and equipment, lease expenses, property taxes and property and casualty insurance expense and equipment expense including depreciation, repairs, rentals, and service contract costs. This item also includes equipment purchases which do not qualify for capitalization in accordance with the entity's accounting policy. This item may also include furniture expenses. Occupancy Net And Equipment Expense Occupancy and equipment Organization, Consolidation and Presentation of Financial Statements Disclosure [Line Items] Organization Consolidation And Presentation Of Financial Statements Disclosure [Line Items] Organization, Consolidation and Presentation of Financial Statements Disclosure [Line Items] Organization, Consolidation and Presentation of Financial Statements Disclosure [Table] Organization Consolidation And Presentation Of Financial Statements Disclosure [Table] Organization, Consolidation and Presentation of Financial Statements Disclosure [Table] Organization Consolidation And Presentation Of Financial Statements Disclosure [Text Block] Basis of presentation and consolidation Other Asset [Member] Other Asset [Member] Other Assets [Member] Other Assets Other assets Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent Other comprehensive income Net-of-tax amount Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent [Abstract] Other comprehensive income: Other Comprehensive Income Loss Tax Portion Attributable To Parent 1 Tax effect Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Before Tax Unrealized holding gains on available-for-sale securities Other Consumer Loan [Member] Other Consumer Loan [Member] Other Consumer Loans [Member] Other General And Administrative Expense Other general and administrative Other Loans [Member] Other Loans [Member] Other Loans [Member] Other Real Estate And Foreclosed Assets Other real estate owned Pass [Member] Loans rated 1-5 [Member] Past Due Financing Receivables Table [Text Block] Schedule of Past Due and Non-Accrual Loans Payments For Origination Of Mortgage Loans Held For Sale Loans originated for sale Payments For Proceeds From Federal Home Loan Bank Stock Purchase of Federal Home Loan Bank stock The net cash outflow or inflow related to loan originations and principal collections. Payments For Proceeds From Loan Originations And Principal Collections Loan (originations), net of principal payments Payments For Repurchase Of Common Stock Repurchase of common stock Payments Of Dividends Common Stock Payment of dividends on common stock Payments To Acquire Available For Sale Securities Purchases of available-for-sale securities Payments To Acquire Loans Held For Investment Purchase of loans Payments To Acquire Property Plant And Equipment Purchase of premises and equipment The percentage of the net increase or decrease in the gross carrying amount of the loan portfolio. Percentage Increase Decrease In Loans Receivable Gross Carrying Amount Percentage change in loan portfolio A percentage of the gross carrying amount of the loan portfolio. Percentage Of Loan Portfolio Percentage of loan portfolio The percentage of the investment in impaired loans that are current with all payment terms. Percentage Of Loans Receivable Impaired Current With Payment Terms Impaired loans, percentage current with payment terms Plan Name [Axis] Plan Name [Axis] Plan Name [Domain] Plan Name [Domain] Pledged Financial Instruments Not Separately Reported Securities For Repurchase Agreements Carrying value of securities pledged to secure repurchase agreements Preferred Stock Par Or Stated Value Per Share Preferred stock, par value Preferred Stock Shares Authorized Preferred stock, shares authorized Preferred Stock Shares Issued Preferred stock, issued Preferred Stock Shares Outstanding Preferred stock, outstanding Preferred Stock Value Preferred stock ($.01 par value, 5,000,000 shares authorized, none issued or outstanding) Private mortgage originators [Member] Private Mortgage Originators [Member] Private mortgage originators [Member] Proceeds From Issuance Of Long Term Debt Proceeds from issuance of long-term debt Proceeds From Maturities Prepayments And Calls Of Available For Sale Securities Maturities and calls of available-for-sale securities Proceeds From Payments For In Securities Sold Under Agreements To Repurchase Net change in repurchase agreements The cash inflow associated with the principal payments of securities not classified as either held-to-maturity securities or trading securities which are classified as available-for-sale securities. Proceeds From Principal Payments Of Available For Sale Securities Principal payments of available-for-sale securities Proceeds From Repayments Of Short Term Debt Net change in short-term borrowings Proceeds From Sale Of Foreclosed Assets Proceeds from sale of other real estate owned Proceeds From Sale Of Loans Held For Sale Proceeds from loan sales Property Plant And Equipment Net Premises and equipment, net Provision For Loan Losses Expensed Provision for loan losses Range [Axis] Range [Axis] Range [Member] Range [Domain] Real Estate Acquired In Satisfaction Of Debt [Member] Other Real Estate Owned [Member] Line items represent receivables. Receivables [Line Items] Receivables [Line Items] Receivable Type [Domain] Receivable Type [Domain] Repayments Of Long Term Debt Repayment of long-term debt Residential Construction [Member] Residential Construction [Member] Residential Construction Loans [Member] Residential Mortgage [Member] 1-4 Family Residential Mortgage Loans [Member] Restricted Stock [Member] Restricted Stock [Member] Retained Earnings Accumulated Deficit Retained earnings Retained Earnings [Member] Retained Earnings Schedule Of Accounts Notes Loans And Financing Receivable [Table] Schedule of Accounts, Notes, Loans and Financing Receivable [Table] Schedule Of Accounts Notes Loans And Financing Receivable [Text Block] Schedule of Loan Balances Schedule Of Available For Sale Securities [Line Items] Schedule of Available-for-sale Securities [Line Items] Schedule Of Available For Sale Securities Reconciliation Table [Text Block] Schedule of Amortized Cost and Estimated Fair Value of Securities Available for Sale Schedule Of Available For Sale Securities [Table] Schedule of Available-for-sale Securities [Table] Schedule Of Earnings Per Share Basic And Diluted Table [Text Block] Schedule of Earnings Per Share Schedule Of Earnings Per Share Diluted By Common Class [Table] Schedule of Earnings Per Share, Diluted, by Common Class, Including Two Class Method [Table] Schedule Of Fair Value Off Balance Sheet Risks [Table] Schedule of Fair Value, Off-balance Sheet Risks [Table] Schedule Of Financing Receivable Allowance For Credit Losses [Table] Schedule of Financing Receivable, Allowance for Credit Losses [Table] Schedule Of Financing Receivable Recorded Investment Credit Quality Indicator [Table] Schedule of Financing Receivable, Recorded Investment, Credit Quality Indicator [Table] Schedule Of Financing Receivables Past Due [Table] Schedule of Financing Receivables Past Due [Table] Schedule Of Financing Receivable Troubled Debt Restructurings [Table] Schedule of Financing Receivable, Troubled Debt Restructurings [Table] Schedule Of Impaired Financing Receivable [Table] Schedule of Impaired Financing Receivable [Table] Tabular disclosure of average recorded investment in impaired loans and interest income recognized on impaired loans. Schedule Of Impaired Loans Average Recorded Investment And Interest Income Recognized Table [Text Block] Schedule of Impaired Loans, Average Recorded Investment and Interest Income Recognized Schedule Of Share Based Compensation Arrangements By Share Based Payment Award [Table] Schedule of Share-based Compensation Arrangements by Share-based Payment Award [Table] Schedule Of Stock By Class [Table] Schedule of Stock by Class [Table] Schedule Of Unrealized Loss On Investments Table [Text Block] Schedule of Securities with Gross Unrealized Losses Second Mortgage [Member] Second Lien [Member] Securities Sold Under Agreements To Repurchase Securities sold under agreements to repurchase Servicing Asset At Fair Value Amount Mortgage servicing rights Share Based Compensation Stock-based compensation Share Based Compensation Arrangement By Share Based Payment Award Award Vesting Period 1 Vesting period Share Based Compensation Arrangement By Share Based Payment Award Description Share-based compensation plan, description Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Grants In Period Shares granted Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Nonvested Weighted Average Grant Date Fair Value Fair value per share at grant date Share Based Compensation Arrangement By Share Based Payment Award Fair Value Assumptions Method Used Fair value assumptions, method used Share Based Compensation Arrangement By Share Based Payment Award [Line Items] Share-based Compensation Arrangement by Share-based Payment Award [Line Items] Share Based Compensation Arrangement By Share Based Payment Award Number Of Shares Authorized Shares authorized for grant Share Based Compensation Arrangement By Share Based Payment Award Options Grants In Period Gross Stock options granted Share Based Compensation Arrangement By Share Based Payment Award Options Grants In Period Weighted Average Grant Date Fair Value Fair value per stock option at grant date Share Based Compensation Arrangements By Share Based Payment Award Award Type And Plan Name [Domain] Award Type [Domain] Share Based Compensation Arrangements By Share Based Payment Award Options Grants In Period Weighted Average Exercise Price Stock options, exercise price Shares Outstanding Balance (in shares) Balance (in shares) Short Term Borrowings Short-term borrowings Special Mention [Member] Loans rated 6 [Member] Statement Equity Components [Axis] Equity Components [Axis] Statement [Line Items] Statement [Line Items] Statement Of Cash Flows [Abstract] Statement of Cash Flows [Abstract] Statement Of Financial Position [Abstract] Statement of Financial Position [Abstract] Statement Of Income And Comprehensive Income [Abstract] Statement of Other Comprehensive Income [Abstract] Statement Of Stockholders Equity [Abstract] Statement of Stockholders' Equity [Abstract] Statement [Table] Statement [Table] Stockholders Equity Balance Balance Total stockholders' equity Stockholders Equity Note Disclosure [Text Block] Dividends Stock Issued During Period Value Share Based Compensation Stock-based compensation Stock Options [Member] Stock Options [Member] Subsequent Event Type [Axis] Subsequent Event Type [Axis] Subsequent Event Type [Domain] Subsequent Event Type [Domain] Substandard [Member] Loans rated 7 [Member] Supplemental Cash Flow Information [Abstract] Supplemental cash flow information: Trading Symbol Trading Symbol Value of loans transferred to foreclosed assets in noncash transactions. Transfer Of Loans To Foreclosed Assets Transfers from loans to other real estate owned Transfers And Servicing Of Financial Instruments Types Of Financial Instruments [Domain] Types of Financial Instruments [Domain] Treasury Stock [Member] Treasury Stock Treasury Stock Shares Treasury stock, shares Treasury Stock Shares Acquired Common stock repurchased (in shares) Treasury Stock Value Treasury stock, at cost (2,090,943 shares at September 30, 2012 and 1,983,153 shares at June 30, 2012) Treasury Stock Value Acquired Cost Method Common stock repurchased Generic abstract to contain tags that are not otherwise categorized. Uncategorized [Abstract] Uncategorized [Abstract] Carrying value of unearned shares for all classes of common stock and nonredeemable preferred stock (or preferred stock redeemable solely at the option of the issuer) held by an employee stock ownership plan (ESOP). Includes the sale of shares or the issuance treasury shares to an ESOP. Unearned E S O P Shares Carrying Value Unearned compensation - ESOP (392,196 shares unallocated at September 30, 2012 and 402,796 shares unallocated at June 30, 2012) Unlikely To Be Collected Financing Receivable [Member] Loans rated 9 [Member] The unpaid principal balance of loans originated and sold by the entity, on which it continues to provide loan servicing to transferees. Unpaid Principal Balance Of Loans Sold And Serviced Loans sold and serviced by the company US Government Sponsored Enterprises and Corporate Debt Securities [Member] U S Government Sponsored Enterprises And Corporate Debt Securities [Member] Government-sponsored enterprises and corporate bonds [Member] Valuation Allowances And Reserves Charged To Cost And Expense Provision Weighted Average Number Of Diluted Shares Outstanding Average number of diluted shares outstanding Diluted (in shares) Weighted Average Number Of Shares Employee Stock Ownership Plan Shares Not Committed To Be Released Less: average unallocated ESOP shares Weighted Average Number Of Shares Issued Basic Average number of shares issued Weighted Average Number Of Shares Outstanding [Abstract] Weighted average shares outstanding Weighted Average Number Of Shares Outstanding Basic Basic (in shares) Average number of basic shares outstanding Weighted Average Number Of Shares Restricted Stock Less: average unvested restricted stock awards Weighted Average Number Of Shares Treasury Stock Less: average treasury stock