BSB Bancorp 10-K 13 Mar 15 2014 FY Annual report Financial data

Document_and_Entity_Informatio

Document and Entity Information (USD $)	12 Months Ended
	Dec. 31, 2014	Mar. 05, 2015	Jun. 30, 2014
Document Information [Line Items]
Document Type	10-K
Amendment Flag	FALSE
Document Period End Date	31-Dec-14
Document Fiscal Year Focus	2014
Document Fiscal Period Focus	FY
Trading Symbol	BLMT
Entity Registrant Name	BSB BANCORP, INC.
Entity Central Index Key	1522420
Current Fiscal Year End Date	-19
Entity Well-known Seasoned Issuer	No
Entity Current Reporting Status	Yes
Entity Voluntary Filers	No
Entity Filer Category	Accelerated Filer
Entity Common Stock, Shares Outstanding		9,069,808
Entity Public Float			$134,276,880

CONSOLIDATED_BALANCE_SHEETS

CONSOLIDATED BALANCE SHEETS (USD $)	Dec. 31, 2014	Dec. 31, 2013
In Thousands, unless otherwise specified
ASSETS
Cash and due from banks	$2,275	$2,203
Interest-bearing deposits in other banks	49,492	35,839
Cash and cash equivalents	51,767	38,042
Interest-bearing time deposits with other banks	131	119
Investments in available-for-sale securities	22,079	21,921
Investments in held-to-maturity securities (fair value of $119,447 as of December 31, 2014 and $118,981 as of December 31, 2013)	118,528	119,776
Federal Home Loan Bank stock, at cost	13,712	7,712
Loans, net of allowance for loan losses of $8,881 as of December 31, 2014 and $7,958 as of December 31, 2013	1,179,399	839,013
Premises and equipment, net	3,066	3,327
Accrued interest receivable	2,977	2,241
Deferred tax asset, net	5,642	5,146
Income taxes receivable	321
Bank-owned life insurance	23,888	13,325
Other real estate owned	0	0
Other assets	4,040	3,997
Total assets	1,425,550	1,054,619
Deposits:
Noninterest-bearing	179,205	139,733
Interest-bearing	805,357	625,020
Total deposits	984,562	764,753
Federal Home Loan Bank advances	285,100	142,100
Securities sold under agreements to repurchase	1,392	2,127
Other borrowed funds	1,067	1,113
Accrued interest payable	961	683
Deferred compensation liability	5,751	5,137
Income taxes payable		178
Other liabilities	9,707	8,107
Total liabilities	1,288,540	924,198
Stockholders' equity:
Common stock; $0.01 par value, 100,000,000 shares authorized; 9,067,792 and 9,055,808 shares issued and outstanding at December 31, 2014 and 2013, respectively	91	91
Additional paid-in capital	87,428	85,449
Retained earnings	53,603	49,312
Accumulated other comprehensive loss	-22	-188
Unearned compensation - ESOP	-4,090	-4,243
Total stockholders' equity	137,010	130,421
Total liabilities and stockholders' equity	$1,425,550	$1,054,619

CONSOLIDATED_BALANCE_SHEETS_Pa

CONSOLIDATED BALANCE SHEETS (Parenthetical) (USD $)	Dec. 31, 2014	Dec. 31, 2013
In Thousands, except Share data, unless otherwise specified
Investments in held-to-maturity securities, fair value	$119,447	$118,981
Loans, allowance for loan losses	$8,881	$7,958
Common stock, par value	$0.01	$0.01
Common stock, shares authorized	100,000,000	100,000,000
Common stock, shares issued	9,067,792	9,055,808
Common stock, shares outstanding	9,067,792	9,055,808

CONSOLIDATED_STATEMENTS_OF_OPE

CONSOLIDATED STATEMENTS OF OPERATIONS (USD $)	12 Months Ended
In Thousands, except Per Share data, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Interest and dividend income:
Interest and fees on loans	$35,296	$28,407	$24,568
Interest on debt securities:
Taxable	3,131	2,455	2,124
Dividends	143	28	47
Other interest income	85	82	85
Total interest and dividend income	38,655	30,972	26,824
Interest expense:
Interest on deposits	5,809	4,215	4,125
Interest on Federal Home Loan Bank advances	1,209	735	958
Interest on securities sold under agreements to repurchase	3	4	8
Interest on other borrowed funds	30	33	42
Total interest expense	7,051	4,987	5,133
Net interest and dividend income	31,604	25,985	21,691
Provision for loan losses	1,552	1,498	2,736
Net interest and dividend income after provision for loan losses	30,052	24,487	18,955
Noninterest income:
Customer service fees	874	938	830
Income from bank-owned life insurance	559	435	439
Net gain on sales of loans	486	1,024	2,520
Net gain on sales and calls of securities		34	59
Loan servicing fee income	826	750	467
Other income	546	425	390
Total noninterest income	3,291	3,606	4,705
Noninterest expense:
Salaries and employee benefits	16,581	15,207	13,305
Director compensation	1,032	889	529
Occupancy expense	1,060	951	801
Equipment expense	605	650	450
Deposit insurance	749	575	500
Data processing	2,933	2,777	2,113
Professional fees	765	929	1,036
Marketing	975	999	928
Other expense	1,790	2,114	1,884
Total noninterest expense	26,490	25,091	21,546
Income before income tax expense	6,853	3,002	2,114
Income tax expense	2,562	1,042	713
Net income	4,291	1,960	1,401
Net income available to common stockholders	$4,152	$1,881	$1,396
Earnings per share
Basic	$0.50	$0.22	$0.16
Diluted	$0.49	$0.22	$0.16

CONSOLIDATED_STATEMENTS_OF_COM

CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Net income	$4,291	$1,960	$1,401
Securities available for sale:
Change in net unrealized gain/loss during the period	230	-454	138
Reclassification adjustment for net gains included in net income		-34
Total securities available for sale	230	-488	138
Defined benefit post-retirement benefit plan:
Change in unrecognized pension plan benefit	48	72	-28
Total defined benefit post-retirement benefit plan	48	72	-28
Other comprehensive income (loss), before tax	278	-416	110
Income tax (expense) benefit	-112	160	-37
Other comprehensive income (loss), net of tax	166	-256	73
Comprehensive income	$4,457	$1,704	$1,474

CONSOLIDATED_STATEMENTS_OF_CHA

CONSOLIDATED STATEMENTS OF CHANGES IN STOCKHOLDERS' EQUITY (USD $)	Total	Common Stock	Additional Paid-In Capital	Retained Earnings	Accumulated Other Comprehensive (Loss) Income	Employee Stock Ownership Plan Unearned Compensation
In Thousands, except Share data
Beginning Balance at Dec. 31, 2011	$131,506	$92	$90,016	$45,951	($5)	($4,548)
Beginning Balance (in shares) at Dec. 31, 2011		9,172,860
Net income	1,401			1,401
Other comprehensive income	73				73
Release of ESOP stock	185		32			153
Stock based compensation-restricted stock awards	74		74
Stock based compensation-stock options	69		69
Restricted stock awards granted (in shares)		359,570
Restricted stock awards granted		3	-3
Ending balance at Dec. 31, 2012	133,308	95	90,188	47,352	68	-4,395
Ending balance (in shares) at Dec. 31, 2012		9,532,430
Net income	1,960			1,960
Other comprehensive income	-256				-256
Release of ESOP stock	209		57			152
Stock based compensation-restricted stock awards	869		869
Stock based compensation-stock options	778		778
Tax benefit from stock compensation	31		31
Share repurchases (in shares)	0	-476,622
Share repurchases	-6,478	-4	-6,474
Ending balance at Dec. 31, 2013	130,421	91	85,449	49,312	-188	-4,243
Ending balance (in shares) at Dec. 31, 2013		9,055,808
Net income	4,291			4,291
Other comprehensive income	166				166
Release of ESOP stock	268		115			153
Stock based compensation-restricted stock awards	906		906
Stock based compensation-stock options	847		847
Tax benefit from stock compensation	109		109
Stock option exercises, net of shares surrendered (in shares)	23,076	10,254
Share repurchases (in shares)	0
Stock option exercises, net of shares surrendered	45		45
Restricted stock awards granted (in shares)		1,730
Restricted stock awards granted	-43		-43
Ending balance at Dec. 31, 2014	$137,010	$91	$87,428	$53,603	($22)	($4,090)
Ending balance (in shares) at Dec. 31, 2014		9,067,792

CONSOLIDATED_STATEMENTS_OF_CAS

CONSOLIDATED STATEMENTS OF CASH FLOWS (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Cash flows from operating activities:
Net income	$4,291	$1,960	$1,401
Adjustments to reconcile net income to net cash provided by operating activities:
Amortization of securities, net	606	608	965
Net gain on sales and calls of securities		-34	-59
Gain on sales of loans, net	-486	-1,024	-2,520
Loans originated for sale	-18,771	-87,892	-161,794
Proceeds from sales of loans	34,014	98,773	197,341
Provision for loan losses	1,552	1,498	2,736
Change in unamortized mortgage premium	-1,045	-883	-198
Change in net deferred loan costs	-1,533	-758	-236
ESOP expense	268	209	185
Depreciation and amortization expense	761	716	517
Impairment of fixed assets	3	41
Deferred income tax (benefit) expense	-608	-961	253
Increase in bank-owned life insurance	-559	-435	-439
Gain on sale of other real estate owned		-5
Stock based compensation expense	1,753	1,647	143
Excess tax benefit from stock-based compensation	-109	-31
Net change in:
Accrued interest receivable	-736	-24	-32
Other assets	-43	-1,723	-123
Income taxes receivable	-321	806	-806
Income taxes payable	-69	209	-121
Accrued interest payable	278	228	278
Deferred compensation liability	614	452	512
Other liabilities	1,088	3,875	1,378
Net cash provided by operating activities	20,948	17,252	39,381
Cash flows from investing activities:
Maturities of interest-bearing time deposits with other banks	119
Purchases of interest-bearing time deposits with other banks	-131
Purchases of available-for-sale securities		-17,833	-22,587
Proceeds from sales of available-for-sale securities		17,985
Proceeds from maturities, payments, and calls of held-to-maturity securities	20,330	25,585	38,350
Purchases of held-to-maturity securities	-19,616	-81,891	-13,745
Purchases of community loan fund investments		-250
Redemption of Federal Home Loan Bank stock	405	496	411
Purchases of Federal Home Loan Bank stock	-6,405	-581
Recoveries of loans previously charged off	29	155	197
Loan originations and principal collections, net	-184,634	-54,098	-75,311
Purchases of loans	-169,512	-129,284	-99,972
Payoff of first mortgage on OREO			-563
Capital expenditures	-503	-1,182	-1,419
Capital expenditures on other real estate owned		-79
Premiums paid on bank-owned life insurance	-10,004	-6	-25
Proceeds from sales of other real estate		745
Net cash used in investing activities	-369,922	-240,238	-174,664
Cash flows from financing activities:
Net increase in demand deposits, NOW and savings accounts	139,779	132,017	174,744
Net increase in time deposits	80,030	24,871	2,467
Proceeds from Federal Home Loan Bank advances	50,000	17,000	15,000
Principal payments on Federal Home Loan Bank advances	-9,000	-23,000	-29,500
Net change in short-term advances	102,000	65,000	2,000
Net (decrease) increase in securities sold under agreements to repurchase	-735	-1,277	419
Repayment of principal on other borrowed funds	-46	-43	-346
Proceeds from exercise of stock options, net of cash paid	45
Restricted stock awards issued, net of awards surrendered	-43
Net increase in mortgagors' escrow accounts	560	195	416
Payments to repurchase stock		-6,478
Excess tax benefit from stock-based compensation	109	31
Net cash provided by financing activities	362,699	208,316	165,200
Net increase (decrease) in cash and cash equivalents	13,725	-14,670	29,917
Cash and cash equivalents at beginning of period	38,042	52,712	22,795
Cash and cash equivalents at end of period	51,767	38,042	52,712
Supplemental disclosures:
Interest paid	6,773	4,759	4,855
Income taxes paid	3,557	988	1,387
Transfer of loans receivable to loans held for sale	14,757		28,355
Transfer of loans to other real estate owned			98
Transfer of loans held for sale to loans receivable		$1,347

SUMMARY_OF_SIGNIFICANT_ACCOUNT

SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES	12 Months Ended
	Dec. 31, 2014
SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES	NOTE 1 – SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES
	Nature of Operations
	BSB Bancorp, Inc. (the “Company”) was incorporated in Maryland in June, 2011 to become the holding company of Belmont Savings Bank (the “Bank”), a state-chartered Massachusetts savings bank. The Company is supervised by the Board of Governors of the Federal Reserve System (“FRB”), while the Bank is subject to the regulations of, and periodic examination by, the Federal Deposit Insurance Corporation (“FDIC”) and the Massachusetts Division of Banks (the “Division”). The Bank’s deposits are insured by the Bank Insurance Fund of the FDIC up to $250,000 per account. For balances in excess of the FDIC deposit insurance limits, coverage is provided by the Massachusetts Depositors Insurance Fund, Inc. (“Mass DIF”). In connection with the Company’s conversion from a mutual holding company to stock holding company form of organization (the “conversion”), on October 4, 2011 we completed our initial public offering of common stock, selling 8,993,000 shares of common stock at $10.00 per share for approximately $89.9 million in gross proceeds, including 458,643 shares sold to the Bank’s employee stock ownership plan. In addition, in connection with the conversion, we issued 179,860 shares of our common stock and contributed $200,000 in cash to the Belmont Savings Bank Foundation.
	Belmont Savings Bank is a state chartered savings bank which was incorporated in 1885 and is headquartered in Belmont, Massachusetts. The Bank is engaged principally in the business of attracting deposits from the general public and investing those deposits in residential and commercial real estate loans, consumer loans, including indirect auto loans, commercial loans and construction loans, as well as investment securities.
	Basis of Presentation
	The consolidated financial statements include the accounts of the Company and its wholly-owned subsidiaries, Belmont Savings Bank and BSB Funding Corporation. All significant intercompany balances and transactions have been eliminated in consolidation.
	The Company’s consolidated financial statements have been prepared in conformity with U.S. generally accepted accounting principles and general practices within the financial services industry.
	Use of Estimates
	The preparation of financial statements in conformity with accounting principles generally accepted in the United States of America requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities as of the date of the balance sheet and reported amounts of revenues and expenses during the reporting period. Actual results could differ from those estimates. Material estimates that are particularly susceptible to significant changes in the near-term relate to the determination of the allowance for loan losses, valuation and potential other-than-temporary impairment (“OTTI”) of investment securities, the valuation of deferred tax assets and the fair value of stock-based compensation awards.
	Reclassification
	Certain previously reported amounts have been reclassified to conform to the current year’s presentation.
	Significant Group Concentrations of Credit Risk
	Most of the Company’s business activity is with customers located within the Commonwealth of Massachusetts. There are no concentrations of credit to borrowers that have similar economic characteristics. The majority of the Company’s loan portfolio is comprised of loans collateralized by real estate located in the Commonwealth of Massachusetts.
	Cash and Cash Equivalents
	For purposes of the consolidated statements of cash flows, cash and cash equivalents include cash, balances due from banks and interest-bearing deposits in other banks.
	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 or trading, 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. Gains and losses on the sale of securities are recorded on the trade date and are determined using the specific identification method.
	Each reporting period, the Company evaluates all securities classified as available-for-sale or held-to-maturity, with a decline in fair value below the amortized cost of the investment to determine whether or not the impairment is deemed to be other-than-temporary (“OTTI”). Consideration is given to the obligor of the security, whether the security is guaranteed, whether there is a projected adverse change in cash flows, the liquidity of the security, the type of security, the capital position of security issuers, and payment history of the security, amongst other factors when evaluating these individual securities.
	OTTI is required to be recognized if (1) the Company intends to sell the security; (2) it is “more likely than not” that the Company will be required to sell the security before recovery of its amortized cost basis; or (3) for debt securities, the present value of expected cash flows is not sufficient to recover the entire amortized cost basis. Marketable equity securities are evaluated for OTTI based on the severity and duration of the impairment and, if deemed to be other than temporary, the declines in fair value are reflected in earnings as realized losses. For impaired debt securities that the Company intends to sell, or more likely than not will be required to sell, the full amount of the depreciation is recognized as OTTI through earnings. For all other impaired debt securities, credit-related OTTI is recognized through earnings and non-credit related OTTI is recognized in other comprehensive income, net of applicable taxes.
	Federal Home Loan Bank Stock
	As a member of the Federal Home Loan Bank of Boston (FHLB), the Company is required to invest in stock of the FHLB. Management evaluates the Company’s investment in the FHLB of Boston stock for other-than-temporary impairment at least on a quarterly basis and more frequently when economic or market conditions warrant such evaluation. Based on its most recent analysis of the FHLB of Boston as of December 31, 2014, management deems its investment in FHLB of Boston stock to be not other-than-temporarily impaired.
	Loans Held For Sale
	Loans purchased or transferred from held for investment, (if intent or ability to hold existing loans changes), and loans originated and intended for sale in the secondary market are carried at the lower of cost or estimated fair value, in the aggregate. Net unrealized losses, if any, are recognized through a valuation allowance by charges to income. Direct loan origination costs and fees are deferred upon origination and are recognized on the date of sale.
	Loans
	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, any deferred fees or costs on originated loans and unamortized premiums on purchased loans.
	Interest income is accrued on the unpaid principal balance. Loan origination fees, net of certain direct origination costs, are deferred and recognized over the expected term as an adjustment of the related loan yield using the interest method.
	The accrual of interest on all loans is discontinued at the time the loan is 90 days past due unless the credit is well-secured and in process of collection. Past due status is based on contractual terms of the loan. In all cases, loans are placed on nonaccrual if collection of principal or interest is considered doubtful. All interest accrued but not collected for loans that are placed on nonaccrual 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. Loans are returned to accrual status when all the principal and interest amounts contractually due are brought current and future payments are reasonably assured.
	Cash receipts of interest income on impaired loans are credited to principal to the extent necessary to eliminate doubt as to the collectability of the net carrying amount of the loan. Some or all of the cash receipts of interest income on impaired loans is recognized as interest income if the remaining net carrying amount of the loan is deemed to be fully collectible. When recognition of interest income on an impaired loan on a cash basis is appropriate, the amount of income that is recognized is limited to that which would have been accrued on the net carrying amount of the loan at the contractual interest rate. Any cash interest payments received in excess of the limit and not applied to reduce the net carrying amount of the loan are recorded as recoveries of charge-offs until the charge-offs are fully recovered.
	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 regular basis by management. This evaluation is inherently subjective as it requires estimates that are susceptible to significant revision as more information becomes available. The allowance consists of general, allocated and unallocated components, as further described below.
	General Component:
	The general component of the allowance for loan losses is based on historical loss experience adjusted for qualitative factors stratified by the following loan segments: residential real estate, home equity lines of credit, commercial real estate, construction, commercial, indirect auto and consumer. Management uses a rolling average of historical losses based on a time frame appropriate to capture relevant loss data for each loan segment. This historical loss factor is adjusted for the following qualitative factors: levels/trends in delinquencies; trends in volume and terms of loans; effects of changes in risk selection and underwriting standards and other changes in lending policies, procedures and practices; experience/ability/depth of lending management and staff; and national and local economic trends and conditions. There were no changes in the Company’s policies or methodology pertaining to the general component of the allowance for loan losses during 2014 or 2013.
	The qualitative factors are determined based on the various risk characteristics of each loan segment. Risk characteristics relevant to each portfolio segment are as follows:
	Residential real estate and home equity loans – The Company generally does not originate loans with a loan-to-value ratio greater than 80 percent and does not grant subprime loans. Loans in this segment are generally collateralized by owner-occupied 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 New England. The underlying cash flows generated by the properties are 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 generally obtains rent rolls annually and continually monitors the cash flows of these borrowers.
	Construction loans – Loans in this segment primarily include speculative real estate development loans for which payment is derived from sale and/or lease up of the property. Credit risk is affected by cost overruns, time to sell at an adequate price, and market conditions.
	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 and business spending, will have an effect on the credit quality in this segment.
	Indirect auto loans – Loans in this segment are secured installment loans that are originated through a network of select regional automobile dealerships. The Company’s interest in the vehicle is secured with a recorded lien on the state title of each automobile. Collections are sensitive to changes in borrower financial circumstances, and the collateral can depreciate or be damaged in the event of repossession. Repayment is dependent on the credit quality and the cash flow of the individual borrower.
	Consumer loans - Loans in this segment include secured and unsecured consumer loans. Repayment is dependent on the credit quality and the cash flow of the individual borrower.
	Allocated Component:
	The allocated component relates to loans that are classified as impaired. A loan is considered impaired when, based on current information and events, it is probable that the Company will be unable to collect the scheduled payments of principal or interest when due according to the contractual terms of the loan agreement. Factors considered by management in determining impairment include payment status, collateral value, and the probability of collecting scheduled principal and interest payments when due. Loans that experience insignificant payment delays and payment shortfalls generally are not classified as impaired. Management determines the significance of payment delays and payment shortfalls on a case-by-case basis, taking into consideration all of the circumstances surrounding the loan and the borrower, including the length of the delay, the reasons for the delay, the borrower’s prior payment record, and the amount of the shortfall in relation to the principal and interest owed.
	The Company periodically may 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 classified as impaired and therefore are subject to a specific review for impairment.
	Impaired loans are measured based on the present value of expected future cash flows discounted at the loan’s effective interest rate at the time of impairment or, as a practical expedient, at the loan’s observable market price or the fair value of the collateral if the loan is collateral-dependent. Generally, impairment on TDRs is measured using the discounted cash flow method by discounting expected cash flows by the loan’s contractual rate of interest in effect prior to the loan’s modification. Loans that have been classified as TDRs and which subsequently default are reviewed to determine if the loan should be deemed collateral dependent. In such an instance, any shortfall between the value of the collateral and the book value of the loan is determined by measuring the recorded investment in the loan against the fair value of the collateral less costs to sell. Generally, all other impaired loans are collateral dependent and impairment is measured through the collateral method. All loans on non-accrual status, with the exception of indirect auto and consumer loans, are considered to be impaired. When the measurement of the impaired loan is less than the recorded investment in the loan, the impairment is recorded through the allowance for loan losses. The Bank charges off the amount of any confirmed loan loss in the period when the loans, or portion of loans, are deemed uncollectible.
	Unallocated Component:
	An unallocated component is maintained to cover uncertainties that could affect management’s estimate of probable losses. The unallocated component of the allowance reflects the margin of imprecision inherent in the underlying assumptions used in the methodologies for estimating allocated and general reserves in the portfolio.
	In the ordinary course of business, the Bank enters into commitments to extend credit, commercial letters of credit and standby letters of credit. Such financial instruments are recorded in the financial statements when they are funded or become payable. The credit risk associated with these commitments is evaluated in a manner similar to the allowance for loan losses. The reserve for off-balance sheet commitments is included in other liabilities in the balance sheet. At December 31, 2014 and 2013, the reserve for unfunded loan commitments was $88,000 and $114,000, respectively. The related provision for off-balance sheet credit losses is included in non-interest expense in the statement of operations.
	Premises and Equipment
	Land is carried at cost. Building and equipment are stated at cost, less accumulated depreciation, computed on the straight-line method over the estimated useful lives of the assets. It is general practice to charge the cost of maintenance and repairs to earnings when incurred; major expenditures for betterments are capitalized and depreciated over the shorter of the lease term for leasehold improvements or their estimated useful lives.
	Bank-owned Life Insurance
	Bank-owned life insurance policies are reflected on the consolidated balance sheets at cash surrender value. Changes in the net cash surrender value of the policies, as well as insurance proceeds received, are reflected in non-interest income on the consolidated statements of operations and are generally not subject to income taxes. The Company reviews the financial strength of the insurance carriers prior to the purchase of life insurance policies and no less than annually thereafter. A life insurance policy with any individual carrier is limited to 15% of tier one capital and the total cash surrender value of life insurance policies is limited to 25% of tier one capital.
	Transfers and Servicing of Financial Assets
	Transfers of an entire financial asset, a group of entire financial assets, or a participating interest in an entire financial asset 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 to pledge or exchange the transferred assets, and (3) the Company does not maintain effective control over the transferred assets.
	During the normal course of business, the Company may transfer whole loans or a portion of a financial asset, such as 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 will 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 has the right to pledge or exchange the entire loan.
	The Company services mortgage loans for others. Mortgage servicing assets are recognized as separate assets when rights are acquired through purchase or through sale of financial assets with servicing rights retained. Fair value is determined using prices for similar assets with similar characteristics, when available, or based upon discounted cash flows using market-based assumptions. Capitalized servicing rights are reported in other assets and are amortized into loan servicing fee income in proportion to, and over the period of, the estimated future net servicing income of the underlying financial assets. Servicing assets are evaluated for impairment based upon the fair value of the rights as compared to amortized cost. Impairment is determined by stratifying rights by predominant risk characteristics, such as interest rates and terms. Impairment is recognized through a valuation allowance for an individual stratum, to the extent that fair value is less than the capitalized amount for the stratum.
	Other Real Estate Owned and Other Foreclosed Assets
	Assets acquired through, or in lieu of, loan foreclosure are held for sale and are initially recorded at fair value, less estimated costs to sell, at the date of foreclosure or when control is established, establishing a new cost basis. Subsequent to foreclosure, valuations are periodically performed by management and the assets are carried at the lower of carrying amount or fair value less cost to sell. Revenue and expenses from operations, changes in the valuation allowance and any direct writedowns are included in other noninterest expense.
	The Company classifies loans as in-substance repossessed or foreclosed if the Company receives physical possession of the debtor’s assets regardless of whether formal foreclosure proceedings take place.
	Advertising Costs
	Advertising costs are expensed as incurred.
	Supplemental Executive Retirement Plan
	The compensation cost of an employee’s retirement benefit is recognized on the projected unit credit method over the employee’s approximate service period. The aggregate cost method is utilized for funding purposes.
	The Company accounts for its supplemental executive retirement plan using an actuarial model that allocates benefit costs over the service period of employees in the plan. The Company accounts for the over-funded or under-funded status of the plan as an asset or liability in its consolidated balance sheets and recognizes changes in the funded status in the year in which the changes occur through other comprehensive income or loss.
Employee Stock Ownership Plan
Compensation expense for the Employee Stock Ownership Plan (“ESOP”) is recorded at an amount equal to the shares allocated by the ESOP multiplied by the average fair value of the shares during the period. The Company recognizes compensation expense ratably over the year based upon the Company’s estimate of the number of shares expected to be allocated by the ESOP. Unearned compensation applicable to the ESOP is reflected as a reduction of stockholders’ equity in the consolidated balance sheet. The difference between the average fair value and the cost of the shares allocated by the ESOP is recorded as an adjustment to additional paid-in capital.
Stock Based Compensation
The Company recognizes stock-based compensation based on the grant-date fair value of the award adjusted for expected forfeitures. The Company values share-based stock option awards granted using the Black-Scholes option-pricing model. The Company recognizes compensation expense for its awards on a straight-line basis over the requisite service period for the entire award (straight-line attribution method), ensuring that the amount of compensation cost recognized at any date at least equals the portion of the grant-date fair value of the award that is vested at that time.
Income Taxes
Deferred income tax assets and liabilities are determined using the liability (or balance sheet) method. Under this method, the net deferred tax asset or liability is determined based on the tax effects of the temporary differences between the book and tax bases of the various balance sheet assets and liabilities and gives current recognition to changes in tax rates and laws. A valuation allowance is established against deferred tax assets when, based upon all available evidence, both positive and negative, it is determined that it is more likely than not that some or all of the deferred tax assets will not be realized.
Fair Value Hierarchy
The Company measures the fair values of its financial instruments in accordance with accounting guidance that requires an entity to base fair value on exit price, and maximize the use of observable inputs and minimize the use of unobservable inputs to determine the exit price. Under applicable accounting guidance, the Company categorizes its financial instruments, based on the priority of inputs to the valuation technique, into a three-level hierarchy, as described below.
Level 1 - Level 1 inputs are quoted prices (unadjusted) in active markets for identical assets or liabilities that the reporting entity has the ability to access at the measurement date.
Level 2 - Level 2 inputs are inputs other than quoted prices included within Level 1 that are observable for the asset or liability, either directly or indirectly.
Level 3 - Level 3 inputs are unobservable inputs for the asset or liability.
Transfers between levels are recognized at the end of a reporting period, if applicable.
Earnings per Share (EPS)
Basic earnings per share is calculated using the two-class method. The two-class method is an earnings allocation formula under which earnings per share is calculated from common stock and participating securities considering both dividends declared (or accumulated) and participation rights in undistributed earnings as if all such earnings had been distributed during the period. Under this method, all earnings distributed and undistributed, are allocated to participating securities and common shares based on their respective rights to receive dividends. Unvested share-based payment awards that contain nonforfeitable rights to dividends are considered participating securities (i.e. unvested restricted stock), not subject to performance based measures. Basic earnings per share is calculated by dividing net income available to common shareholders by the weighted average number of common shares outstanding (inclusive of participating securities). Diluted earnings per share have been calculated in a manner similar to that of basic earnings per share except that the weighted average number of common shares outstanding is increased to include the number of additional common shares that would have been outstanding if all potentially dilutive common shares (such as those resulting from the exercise of stock options or the attainment of performance measures) were issued during the period, computed using the treasury stock method.
Comprehensive Income
Accounting principles generally require that recognized revenue, expenses, gains and losses be included in net income. Although certain changes in assets and liabilities are reported as a separate component of the stockholders’ equity section of the balance sheet, such items, along with net income, are components of comprehensive income. Other comprehensive income includes unrealized gains and losses on securities available for sale and changes in the funded status of the Company’s postretirement and supplemental retirement plans.
Recent accounting pronouncements
In January 2014, the Financial Accounting Standards Board (“FASB”) issued Accounting Standards Update (“ASU”) 2014-01, “Investments - Equity Method and Joint Ventures (Topic 323): Accounting for Investments in Qualified Affordable Housing Projects.” The amendments in this ASU apply to all reporting entities that invest in qualified affordable housing projects through limited liability entities that are flow-through entities for tax purposes as follows:
1. For reporting entities that meet the conditions for and that elect to use the proportional amortization method to account for investments in qualified affordable housing projects, all amendments in this ASU apply.
2. For reporting entities that do not meet the conditions for or that do not elect the proportional amortization method, only the amendments in this ASU that are related to disclosures apply.
The amendments in this ASU permit reporting entities to make an accounting policy election to account for their investments in qualified affordable housing projects using the proportional amortization method if certain conditions are met. Under the proportional amortization method, an entity amortizes the initial cost of the investment in proportion to the tax credits and other tax benefits received and recognizes the net investment performance in the income statement as a component of income tax expense (benefit). For those investments in qualified affordable housing projects not accounted for using the proportional amortization method, the investment should be accounted for as an equity method investment or a cost method investment in accordance with Subtopic 970-323. The amendments in this ASU should be applied retrospectively to all periods presented. A reporting entity that uses the effective yield method to account for its investments in qualified affordable housing projects before the date of adoption may continue to apply the effective yield method for those preexisting investments. The amendments in this ASU are effective for annual periods and interim reporting periods within those annual periods, beginning after December 15, 2014. Early adoption is permitted. The Company does not expect that the adoption of this ASU will have an impact on the Company’s consolidated financial statements.
In January 2014, the FASB issued ASU 2014-04, “Receivables-Troubled Debt Restructurings by Creditors (Subtopic 310-40): Reclassification of Residential Real Estate Collateralized Consumer Mortgage Loans upon Foreclosure.” The objective of the amendments in this ASU is to reduce diversity by clarifying when an in substance repossession or foreclosure occurs, that is, when a creditor should be considered to have received physical possession of residential real estate property collateralizing a consumer mortgage loan such that the loan receivable should be derecognized and the real estate property recognized. The amendments in this ASU 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 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 amendments in this ASU are effective for annual periods, and interim periods within those annual periods, beginning after December 15, 2014. An entity can elect to adopt the amendments in this ASU using either a modified retrospective transition method or a prospective transition method. The Company does not expect that the adoption of this ASU will have a material impact on the Company’s consolidated financial statements.
In April 2014, the FASB issued ASU 2014-08, “Presentation of Financial Statements (Topic 205) and Property, Plant, and Equipment (Topic 360): Reporting Discontinued Operations and Disclosures of Disposals of Components of an Entity.” This ASU changes the criteria for reporting discontinued operations and modifies related disclosure requirements. The new guidance is effective on a prospective basis for fiscal years beginning on or after December 15, 2014, and interim periods within those years. The Company anticipates that the adoption of this guidance will not have a material impact on its consolidated financial statements.
In May 2014, the FASB issued ASU 2014-09, “Revenue from Contracts with Customers (Topic 606).” The objective of this ASU is to clarify principles for recognizing revenue and to develop a common revenue standard for GAAP and International Financial Reporting Standards. The guidance in this ASU affects any entity that either enters into contracts with customers to transfer goods or services or enters into contracts for the transfer of nonfinancial assets unless those contracts are within the scope of other standards. The core principal of the guidance is that an entity should recognize revenue to depict the transfer of promised goods or services to customers in an amount that reflects the consideration to which the entity expects to be entitled in exchange for those goods or services. The amendments in this update are effective for annual reporting periods beginning after December 15, 2016, including interim periods within that reporting period. Early application is not permitted. The Company is currently reviewing this ASU to determine if it will have a material impact on its consolidated financial statements.
In June 2014, the FASB issued ASU 2014-11, “Transfers and Servicing (Topic 860): Repurchase-to-Maturity Transactions, Repurchase Financings, and Disclosures.” The amendments in this ASU require two accounting changes. First, the amendments in this ASU change the accounting for repurchase-to-maturity transactions to secured borrowing accounting. Second, for repurchase financing arrangements, the amendments require separate accounting for a transfer of a financial asset executed contemporaneously with a repurchase agreement with the same counterparty, which will result in secured borrowing accounting for the repurchase agreement. This ASU also includes new disclosure requirements. The accounting changes in this Update are effective for the first interim or annual period beginning after December 15, 2014. An entity is required to present changes in accounting for transactions outstanding on the effective date as a cumulative-effect adjustment to retained earnings as of the beginning of the period of adoption. Earlier application is prohibited. The Company anticipates that the adoption of this guidance will not have a material impact on its consolidated financial statements.
In June 2014, the FASB issued ASU 2014-12, “Compensation - Stock Compensation (Topic 718): Accounting for Share-Based Payments When the Terms of an Award Provide That a Performance Target Could be Achieved after the Requisite Service Period.” The amendments in this ASU require that a performance target that affects vesting and that could be achieved after the requisite service period be treated as a performance condition. A reporting entity should apply existing guidance in Topic 718 as it relates to awards with performance conditions that affect vesting to account for such awards. This ASU is effective for annual periods, and interim periods within those annual periods, beginning after December 15, 2015. Earlier adoption is permitted. ASU 2014-12 may be adopted either (a) prospectively to all awards granted or modified after the effective date or (b) retrospectively to all awards with performance targets that are outstanding as of the beginning of the earliest annual period presented in the financial statements, and to all new or modified awards thereafter. If retrospective transition is adopted, the cumulative effect of applying this update as of the beginning of the earliest annual period presented in the financial statements should be recognized as an adjustment to the opening retained earnings balance at that date. The Company anticipates that the adoption of this guidance will not have a material impact on its consolidated financial statements.
In August 2014, the FASB issued ASU 2014-13, “Consolidation (Topic 810): Measuring the Financial Assets and the Financial Liabilities of a Consolidated Collateralized Financing Entity.” This ASU applies to entities that meet the following criteria:
	1	they are required to consolidate a collateralized entity under the Variable Interest Entities guidance;
	2	they measure all of the financial assets and the financial liabilities of that consolidated collateralized financing entity at fair value in the consolidated financial statements based on other FASB rules; and
	3	those changes in fair value are reflected in earnings.
Under ASU 2014-13, entities that meet these criteria are provided an alternative under which they can choose to eliminate the difference between the fair value of financial assets and financial liabilities of a consolidated collateralized financing entity. If that alternative is not elected, then ASU 2014-13 indicates that the fair value of the financial assets and the fair value of the financial liabilities of the consolidated collateralized financing entity should be measured in accordance with ASC 820. Fair Value Measurement and differences between the fair value of the financial assets and the financial liabilities of that consolidated collateralized financing entity should be reflected in earnings and attributed to the reporting entity in the consolidated statement of income or loss. The amendments in this ASU are effective for annual periods, and interim periods within those annual periods, beginning after December 15, 2015. The Company anticipates that the adoption of this ASU will not have an impact on its consolidated financial statements.
In August 2014, the FASB issued ASU 2014-14, “Receivables - Troubled Debt Restructurings by Creditors (Subtopic 310-40): Classification of Certain Government - Guaranteed Mortgage Loans upon Foreclosure.” The amendments in this ASU require that a mortgage loan be derecognized and that a separate other receivable be recognized upon foreclosure if the following conditions are met:
	1	the loan has a government guarantee that is not separable from the loan before foreclosure;
	2	at the time of foreclosure, the creditor has the intent to convey the real estate property to the guarantor and make a claim on the guarantee, and the creditor has the ability to recover under that claim; and
	3	at the time of foreclosure, any amount of the claim that is determined on the basis of the fair value of the real estate is fixed.
Upon foreclosure, the separate other receivable should be measured based on the amount of the loan balance (principal and interest) expected to be recovered from the guarantor. The amendments in this ASU are effective for annual periods, and interim periods within those annual periods, beginning after December 15, 2014. The Company anticipates that the adoption of this ASU will not have a material impact on its consolidated financial statements.
In August 2014, the FASB issued ASU 2014-15, “Presentation of Financial Statements – Going Concern (Subtopic 205-40).” The amendments in this ASU provide guidance about management’s responsibility to evaluate whether there is substantial doubt about an entity’s ability to continue as a going concern and to provide related footnote disclosures. The amendments require management to assess an entity’s ability to continue as a going concern by incorporating and expanding upon certain principles that are currently in U.S. auditing standards. Specifically, the amendments (1) provide a definition of the term substantial doubt, (2) require an evaluation every reporting period including interim periods, (3) provide principles for considering the mitigating effect of management’s plans, (4) require certain disclosures when substantial doubt is alleviated as a result of consideration of management’s plans, (5) require an express statement and other disclosures when substantial doubt is not alleviated, and (6) require an assessment for a period of one year after the date that the financial statements are issued (or available to be issued). The amendments in this ASU are effective for the annual period ending after December 15, 2016, and for annual periods and interim periods thereafter. Early application is permitted. The adoption of this guidance is not expected to have an impact on the Company’s consolidated financial statements.
In November 2014, the FASB issued ASU 2014-16, “Derivatives and Hedging (Topic 815).” The objective of this ASU is to eliminate the use of different methods in practice and thereby reduce existing diversity under GAAP in the accounting for hybrid financial instruments issued in the form of a share. The amendments in this ASU apply to all entities that are issuers of, or investors in, hybrid financial instruments that are issued in the form of a share. The amendments in this ASU do not change the current criteria in GAAP for determining when separation of certain embedded derivative features in a hybrid financial instrument is required. The amendments clarify how current GAAP should be interpreted in evaluating the economic characteristics and risks of a host contract in a hybrid financial instrument that is issued in the form of a share. Specifically, the amendments clarify that an entity should consider all relevant terms and features, including the embedded derivative feature being evaluated for bifurcation, in evaluating the nature of the host contract. Furthermore, the amendments clarify that no single term or feature would necessarily determine the economic characteristics and risks of the host contract. Rather, the nature of the host contract depends upon the economic characteristics and risks of the entire hybrid financial instrument. In addition, the amendments in this ASU clarify that, in evaluating the nature of a host contract, an entity should assess the substance of the relevant terms and features when considering how to weight those terms and features. Specifically, the assessment of the substance of the relevant terms and features should incorporate a consideration of (1) the characteristics of the terms and features themselves, (2) the circumstances under which the hybrid financial instrument was issued or acquired, and (3) the potential outcomes of the hybrid financial instrument, as well as the likelihood of those potential outcomes. The amendments in this ASU are effective for fiscal years, and interim periods within those fiscal years, beginning after December 15, 2015. Early adoption is permitted. The adoption of this guidance is not expected to have an impact on the Company’s consolidated financial statements.
In November 2014, the FASB issued ASU 2014-17, “Business Combinations (Topic 805): Pushdown Accounting.” The amendments in this ASU provide guidance on whether and at what threshold an acquired entity that is a business or nonprofit activity may elect to apply pushdown accounting in its separate financial statements upon a change-in-control event in which an acquirer obtains control of the acquired entity. The amendments in this ASU are effective on November 18, 2014. After the effective date, an acquired entity can make an election to apply the guidance to future change-in-control events or to its most recent change-in-control event. However, if the financial statements for the period in which the most recent change-in-control event occurred already have been issued or made available to be issued, the application of this guidance would be a change in accounting principle. The adoption of this guidance did not have an impact on the Company’s consolidated financial statements.
In January 2015, the FASB issued ASU 2015-01, “Income Statement – Extraordinary and Unusual Items (Subtopic 225-20).” The amendments in this ASU eliminate the concept of extraordinary items. Eliminating the concept of extraordinary items will save time and reduce costs for preparers because they will not have to assess whether a particular event or transaction event is extraordinary (even if they ultimately would conclude it is not). This also alleviates uncertainty for preparers, auditors, and regulators because auditors and regulators no longer will need to evaluate whether a preparer treated an unusual and/or infrequent item appropriately. The presentation and disclosure guidance for items that are unusual in nature or occur infrequently will be retained and will be expanded to include items that are both unusual in nature and infrequently occurring. The amendments in this ASU are effective for fiscal years, and interim periods within those fiscal years, beginning after December 15, 2015. A reporting entity may apply the amendments prospectively. A reporting entity also may apply the amendments retrospectively to all prior periods presented in the financial statements. Early adoption is permitted provided that the guidance is applied from the beginning of the fiscal year of adoption. The adoption of this guidance is not expected to have an impact on the Company’s consolidated financial statements.

RESTRICTIONS_ON_CASH_AND_AMOUN

RESTRICTIONS ON CASH AND AMOUNTS DUE FROM BANKS	12 Months Ended
	Dec. 31, 2014
RESTRICTIONS ON CASH AND AMOUNTS DUE FROM BANKS	NOTE 2 – RESTRICTIONS ON CASH AND AMOUNTS DUE FROM BANKS
	Cash and cash equivalents as of December 31, 2014 and 2013 includes $15,263,000 and $8,816,000, respectively, which is subject to withdrawals and usage restrictions to satisfy the reserve requirements of the Federal Reserve Bank of Boston.

SECURITIES

SECURITIES	12 Months Ended
	Dec. 31, 2014
SECURITIES	NOTE 3 – SECURITIES
	Debt securities have been classified in the consolidated balance sheets according to management’s intent.
	The following table presents a summary of the amortized cost, gross unrealized holding gains and losses and fair value of securities available for sale and securities held to maturity for the periods indicated. Gross unrealized holding gains and losses on available for sale securities are included in accumulated other comprehensive loss.
				December 31, 2014											December 31, 2013
		Amortized		Gross			Gross			Fair			Amortized		Gross		Gross			Fair
		Cost		Unrealized			Unrealized			Value			Cost		Unrealized		Unrealized			Value
		Basis		Gains			Losses						Basis		Gains		Losses
	Available for sale securities:
	Corporate debt securities	$	22,199	$	86		$	(206	)	$	22,079		$	22,271	$	75	$	(425	)	$	21,921
		$	22,199	$	86		$	(206	)	$	22,079		$	22,271	$	75	$	(425	)	$	21,921
	Held to maturity securities:
	U.S. government sponsored mortgage-backed securities	$	100,977	$	1,019		$	(227	)	$	101,769		$	99,257	$	572	$	(998	)	$	98,831
	Corporate debt securities		17,551		164			(37	)		17,678			20,519		120		(489	)		20,150
		$	118,528	$	1,183		$	(264	)	$	119,447		$	119,776	$	692	$	(1,487	)	$	118,981
	The amortized cost and estimated fair value of debt securities by contractual maturity at December 31, 2014 is as follows. Expected maturities will differ from contractual maturities because issuers may have the right to call or prepay obligations with or without call or prepayment penalties.
		Available for Sale					Held-to-Maturity
		Amortized		Fair			Amortized			Fair
		Cost Basis		Value			Cost Basis			Value
	Due in one year or less	$	—	$	—		$	—		$	—
	Due from one year to five years		12,807		12,893			7,277			7,355
	Due from five years to ten years		9,392		9,186			65,912			66,256
	Due after ten years		—		—			45,339			45,836
	At December 31, 2014 and 2013, securities with a carrying value of $3,830,000 and $4,832,000, respectively, were pledged to secure securities sold under agreements to repurchase. Securities with a carrying value of $51,062,000 and $48,133,000 were pledged to secure borrowings with the Federal Home Loan Bank of Boston at December 31, 2014 and 2013, respectively, and securities with a carrying value of $15,662,000 and $3,016,000 were pledged to an available line of credit with the Federal Reserve Bank of Boston at December 31, 2014 and 2013, respectively.
	Information relating to sales of securities available-for-sale during the years ending December 31, 2014, 2013 and 2012 were as follows:
		2014		2013			2012
	Proceeds from sales	$	—	$	17,985		$	—
	Gross realized gains		—		64			—
	Gross realized losses		—		(30	)		—
	Tax expense of securities gains/losses		—		14			—
	In addition to the securities listed above, the Company holds securities in Rabbi Trust investments that are used to fund the executive and director non-qualified deferred compensation plan. These Rabbi Trust investments were included in other assets and consisted primarily of cash and cash equivalents, mutual funds and both U.S. government agency and corporate obligations, and are classified as trading securities and recorded at fair value. The fair value of these Rabbi Trust investments at December 31, 2014 and December 31, 2013 were $2.3 million and $2.2 million, respectively. For the year ended December 31, 2014, the net gain on Rabbi Trust investments still held at the reporting date was $65,000. For the year ended December 31, 2013, the net gain on Rabbi Trust investments still held at the reporting date was $81,000. Refer to Note 15 – Employee Benefit Plans, for more information.
	Information pertaining to securities with gross unrealized losses at December 31, 2014 and 2013, aggregated by investment category and length of time that individual securities have been in a continuous loss position, follows:
		Less than 12 Months					Over 12 Months
		Fair		Unrealized			Fair			Unrealized
		Value		Losses			Value			Losses
	December 31, 2014:
	Available-for-sale
	Corporate debt securities	$	—	$	—		$	4,185		$	(206	)
	Held-to-maturity
	Corporate debt securities		4,691		(37	)		—			—
	U.S. government sponsored mortgage-backed securities		10,974		(34	)		15,637			(193	)
	Total temporarily impaired securities	$	15,665	$	(71	)	$	19,822		$	(399	)
	December 31, 2013:
	Available-for-sale
	Corporate debt securities	$	4,970	$	(30	)	$	4,052		$	(395	)
	Held-to-maturity
	Corporate debt securities		10,010		(489	)		—			—
	U.S. government sponsored mortgage-backed securities		59,073		(998	)		6			—
	Total temporarily impaired securities	$	74,053	$	(1,517	)	$	4,058		$	(395	)
	Management evaluates securities for other-than-temporary impairment at least on a quarterly basis, and more frequently when economic or market concerns warrant such evaluation.
	At December 31, 2014, 21 debt securities had unrealized losses with aggregate depreciation of 1.31% from the Company’s amortized cost basis.
	The Company’s unrealized losses on investments in corporate bonds and mortgage-backed securities are primarily caused by changes in market interest rates. The contractual terms of these investments do not permit the companies to settle the security at a price less than the par value of the investment. The Company currently does not believe it is probable that it will be unable to collect all amounts due according to the contractual terms of the investments. Therefore, it is expected that the securities would not be settled at a price less than the par value of the investment. Because the Company does not intend to sell the investments and it is more likely than not that the Company will not be required to sell the investments before recovery of their amortized cost basis, it does not consider these investments to be other-than-temporarily impaired at December 31, 2014.

LOANS

LOANS	12 Months Ended
	Dec. 31, 2014
LOANS	NOTE 4 – LOANS
	A summary of the balances of loans follows:
			December 31,
			2014			2013
	Mortgage loans on real estate:
	Residential one-to-four family		$	450,572		$	287,652
	Commercial real estate loans			395,178			320,807
	Home equity loans			131,628			92,461
	Construction loans			31,389			9,965
	Total real estate loans			1,008,767			710,885
	Other loans:
	Commercial loans			39,161			30,691
	Indirect auto loans			131,961			99,798
	Consumer loans			774			558
				171,896			131,047
	Total loans			1,180,663			841,932
	Net deferred loan costs			5,068			3,535
	Net unamortized mortgage premiums			2,549			1,504
	Allowance for loan losses			(8,881	)		(7,958	)
	Total loans, net		$	1,179,399		$	839,013
	The following tables present the activity in the allowance for loan losses for the years ended December 31, 2014, 2013 and 2012 and the balances of the allowance for loan losses and recorded investment in loans by portfolio class based on impairment method at December 31, 2014 and 2013. The recorded investment in loans in any of the following tables does not include accrued and unpaid interest or any deferred loan fees or costs, as amounts are not significant.
			Year Ended December 31, 2014
			Beginning			Provision			Charge-offs			Recoveries		Ending Balance
			balance
	Residential one-to-four family		$	2,189		$	550		$	(375	)	$	—	$	2,364
	Commercial real estate			3,621			422			—			—		4,043
	Construction			134			94			—			—		228
	Commercial			419			43			(4	)		—		458
	Home equity			681			346			(199	)		—		828
	Indirect auto			749			65			(51	)		15		778
	Consumer			26			—			(29	)		14		11
	Unallocated			139			32			—			—		171
	Total		$	7,958		$	1,552		$	(658	)	$	29	$	8,881
			Year Ended December 31, 2013
			Beginning			Provision			Charge-offs			Recoveries		Ending Balance
			balance			(benefit)
	Residential one-to-four family		$	1,412		$	709		$	—		$	68	$	2,189
	Commercial real estate			3,039			582			—			—		3,621
	Construction			198			(64	)		—			—		134
	Commercial			470			(51	)		—			—		419
	Home equity			466			235			(20	)		—		681
	Indirect auto			772			(30	)		(62	)		69		749
	Consumer			19			42			(53	)		18		26
	Unallocated			64			75			—			—		139
	Total		$	6,440		$	1,498		$	(135	)	$	155	$	7,958
			Year Ended December 31, 2012
			Beginning			Provision			Charge-offs			Recoveries		Ending Balance
			balance
	Residential one-to-four family		$	986		$	608		$	(225	)	$	43	$	1,412
	Commercial real estate			1,969			1,070			—			—		3,039
	Construction			188			10			—			—		198
	Commercial			321			149			—			—		470
	Home equity			632			453			(715	)		96		466
	Indirect auto			664			343			(281	)		46		772
	Consumer			16			39			(48	)		12		19
	Unallocated			—			64			—			—		64
	Total		$	4,776		$	2,736		$	(1,269	)	$	197	$	6,440
			Year Ended December 31, 2014
			Individually evaluated for impairment						Collectively evaluated for impairment					Total
			Loan balance			Allowance			Loan balance			Allowance		Loan Balance		Allowance
	Residential one-to-four family		$	6,256		$	188		$	444,316		$	2,176	$	450,572	$	2,364
	Commercial real estate			3,882			5			391,296			4,038		395,178		4,043
	Construction			—			—			31,389			228		31,389		228
	Commercial			—			—			39,161			458		39,161		458
Home equity			296			—			131,332			828		131,628		828
Indirect auto			12			—			131,949			778		131,961		778
Consumer			—			—			774			11		774		11
Unallocated			—			—			—			171		—		171
Total		$	10,446		$	193		$	1,170,217		$	8,688	$	1,180,663	$	8,881
		Year Ended December 31, 2013
		Individually evaluated for impairment						Collectively evaluated for impairment					Total
		Loan balance			Allowance			Loan balance			Allowance		Loan Balance		Allowance
Residential one-to-four family		$	6,982		$	869		$	280,670		$	1,320	$	287,652	$	2,189
Commercial real estate			4,081			11			316,726			3,610		320,807		3,621
Construction			—			—			9,965			134		9,965		134
Commercial			—			—			30,691			419		30,691		419
Home equity			400			—			92,061			681		92,461		681
Indirect auto			16			—			99,782			749		99,798		749
Consumer			1			—			557			26		558		26
Unallocated			—			—			—			139		—		139
Total		$	11,480		$	880		$	830,452		$	7,078	$	841,932	$	7,958
Information about loans that meet the definition of an impaired loan in ASC 310-10-35 is as follows as of December 31, 2014 and 2013:
		Impaired loans with a related allowance for credit losses at December 31, 2014
		Recorded			Unpaid			Related
		Investment			Principal			Allowance For
					Balance			Credit Losses
Residential one-to-four family		$	1,186		$	1,186		$	188
Commercial real estate			3,060			3,060			5
Construction			—			—			—
Commercial			—			—			—
Home equity			—			—			—
Indirect auto			—			—			—
Consumer			—			—			—
Totals		$	4,246		$	4,246		$	193
		Impaired loans with no related allowance for credit losses at December 31, 2014
		Recorded			Unpaid			Related
		Investment			Principal			Allowance For
					Balance			Credit Losses
Residential one-to-four family		$	5,070		$	5,229		$	—
Commercial real estate			822			822			—
Construction			—			—			—
Commercial			—			—			—
Home equity			296			298			—
Indirect auto			12			12			—
Consumer			—			—			—
Totals		$	6,200		$	6,361		$	—
		Impaired loans with a related allowance for credit losses at December 31, 2013
		Recorded			Unpaid			Related
		Investment			Principal			Allowance For
					Balance			Credit Losses
Residential one-to-four family		$	3,824		$	3,824		$	869
Commercial real estate			3,111			3,111			11
Construction			—			—			—
Commercial			—			—			—
Home equity			—			—			—
Indirect auto			—			—			—
Consumer			—			—			—
Totals		$	6,935		$	6,935		$	880
		Impaired loans with no related allowance for credit losses at December 31, 2013
		Recorded			Unpaid			Related
		Investment			Principal			Allowance For
					Balance			Credit Losses
Residential one-to-four family		$	3,158		$	3,158		$	—
Commercial real estate			970			970			—
Construction			—			—			—
Commercial			—			—			—
Home equity			400			599			—
Indirect auto			16			16			—
Consumer			1			1			—
Totals		$	4,545		$	4,744		$	—
The following tables set forth information regarding interest income recognized on impaired loans, by portfolio, for the periods indicated.
		Year Ended December 31, 2014						Year Ended December 31, 2013					Year Ended December 31, 2012
With an allowance recorded		Average			Interest			Average			Interest		Average		Interest
		Recorded			Income			Recorded			Income		Recorded		Income
		Investment			Recognized			Investment			Recognized		Investment		Recognized
Residential one-to-four family		$	1,592		$	107		$	2,566		$	10	$	1,325	$	11
Commercial real estate			3,085			115			1,824			59		—		—
Construction			—			—			—			—		—		—
Commercial			—			—			—			—		—		—
Home equity			—			—			—			—		432		3
Indirect auto			—			—			—			—		—		—
Consumer			—			—			—			—		—		—
Totals		$	4,677		$	222		$	4,390		$	69	$	1,757	$	14
		Year Ended December 31, 2014						Year Ended December 31, 2013					Year Ended December 31, 2012
Without an allowance recorded		Average			Interest			Average			Interest		Average		Interest
		Recorded			Income			Recorded			Income		Recorded		Income
		Investment			Recognized			Investment			Recognized		Investment		Recognized
Residential one-to-four family		$	3,689		$	83		$	5,460		$	130	$	3,006	$	76
Commercial real estate			887			34			2,258			118		889		32
Construction			—			—			—			—		—		—
Commercial			—			—			—			—		35		4
Home equity			398			8			462			17		410		13
Indirect auto			2			—			3			—		—		—
Consumer			—			—			—			—		—		—
Totals		$	4,976		$	125		$	8,183		$	265	$	4,340	$	125
At December 31, 2014, there were no additional funds committed to be advanced in connection with loans to borrowers with impaired loans.
The following is a summary of past due and non-accrual loans at December 31, 2014 and 2013:
		December 31, 2014
		30–59 Days			60–89 Days			90 Days			Total		90 days		Loans on
								or More			Past Due		or more		Non-accrual
													and accruing
Real estate loans:
Residential one-to-four family		$	—		$	230		$	2,432		$	2,662	$	—	$	2,662
Commercial real estate			—			—			—			—		—		—
Home equity			270			—			96			366		—		96
Construction			—			—			—			—		—		—
Other loans:
Commercial			—			—			—			—		—		—
Indirect auto			463			45			12			520		—		12
Consumer			—			—			—			—		—		—
		$	733		$	275		$	2,540		$	3,548	$	—	$	2,770
		December 31, 2013
		30–59 Days			60–89 Days			90 Days			Total		90 days or		Loans on
								or More			Past Due		more		Non-accrual
													and accruing
Real estate loans:
Residential one-to-four family		$	410		$	—		$	1,911		$	2,321	$	—	$	3,860
Commercial real estate			—			—			38			38		—		38
Home equity			914			—			—			914		—		200
Construction			—			—			—			—		—		—
Other loans:
Commercial			—			—			—			—		—		—
Indirect auto			222			—			16			238		—		16
Consumer			—			—			1			1		—		1
		$	1,546		$	—		$	1,966		$	3,512	$	—	$	4,115
Credit Quality Information
The Company utilizes a seven grade internal loan rating system for commercial, commercial real estate and construction loans, and a five grade internal loan rating system for certain residential real estate, home equity and consumer loans that are rated if the loans become delinquent.
Loans rated 1 - 3: Loans in these categories are considered “pass” rated loans with low to average risk.
Loans rated 4: 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 5: 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 6: 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 7: Loans in this category are considered uncollectible (“loss”) and of such little value that their continuance as loans is not warranted.
On an annual basis, or more often if needed, the Company formally reviews the ratings on all commercial, commercial real estate loans, and construction loans. On an annual basis, 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.
On a quarterly basis, the Company formally reviews the ratings on all residential real estate and home equity loans if they have become delinquent. Criteria used to determine ratings consist of loan-to-value ratios and days delinquent.
The following table presents the Company’s loans by risk rating at December 31, 2014 and 2013. There were no loans rated as 6 (“doubtful”) or 7 (“loss”) at the dates indicated.
		December 31, 2014
		Loans rated 1-3			Loans rated 4			Loans rated 5			Loans not rated (A)		Total
Residential one-to-four family		$	—		$	1,134		$	3,400		$	446,038	$	450,572
Commercial real estate			386,513			—			8,665			—		395,178
Construction			31,389			—			—			—		31,389
Commercial			39,159			2			—			—		39,161
Home equity			—			—			895			130,733		131,628
Indirect auto			—			—			—			131,961		131,961
Consumer			—			—			—			774		774
Total		$	457,061		$	1,136		$	12,960		$	709,506	$	1,180,663
		31-Dec-13
		Loans rated 1-3			Loans rated 4			Loans rated 5			Loans not rated (A)		Total
Residential one-to-four family		$	—		$	3,123		$	4,613		$	279,916	$	287,652
Commercial real estate			307,093			4,277			9,437			—		320,807
Construction			9,965			—			—			—		9,965
Commercial			30,643			48			—			—		30,691
Home equity			—			200			999			91,262		92,461
Indirect auto			—			—			—			99,798		99,798
Consumer			—			9			4			545		558
Total		$	347,701		$	7,657		$	15,053		$	471,521	$	841,932
(A)	Residential real estate, home equity, indirect auto and consumer loans are not formally risk rated by the Company unless the loans become delinquent.
The Company periodically modifies loans to extend the term or make other concessions to help a borrower stay current on their loan and to avoid foreclosure. The Company generally does not forgive principal or interest on loans or modify the interest rates on loans to those not otherwise available in the market. During the year ended December 31, 2014, four loans were modified and determined to be troubled debt restructurings (three of which had previously been restructured and determined to be troubled debt restructurings). During the year ended December 31, 2013, five loans were modified and determined to be troubled debt restructurings. At December 31, 2014, the Company had $9.2 million of troubled debt restructurings related to 10 loans.
The following table shows the Company’s total TDRs and other pertinent information as of the dates indicated (in thousands):
		December 31, 2014			December 31, 2013
TDRs on Accrual Status		$	7,675		$	7,366
TDRs on Nonaccrual Status			1,551			1,900
Total TDRs		$	9,226		$	9,266
Amount of specific allocation included in the allowance for loan losses associated with TDRs		$	174		$	543
Additional commitments to lend to a borrower who has been a party to a TDR		$	—		$	—
The following table shows the TDR modifications which occurred during the periods indicated and the outstanding recorded investment subsequent to the modifications occurring:
		Year ended
		December 31, 2014
		# of			Pre-modification			Post-modification
		Contracts			outstanding			outstanding
					recorded investment			recorded investment (a)
Real estate loans:
Residential one-to-four family			2		$	2,224		$	2,261
Home equity lines of credit			1			200			200
Commercial real estate			1			882			882
			4		$	3,306		$	3,343
		Year ended
		31-Dec-13
		# of			Pre-modification			Post-modification
		Contracts			outstanding			outstanding
					recorded investment			recorded investment (a)
Real estate loans:
Residential one-to-four family			1		$	347		$	378
Commercial real estate			4			4,732			4,128
			5		$	5,079		$	4,506
(a)	The post-modification balances represent the balance of the loan on the date of modifications. These amounts may show an increase when modifications include a capitalization of interest or taxes.
The following table shows the Company’s post-modification balance of TDRs listed by type of modification during the years indicated:
		For the years ended
		December 31, 2014			December 31, 2013
Extended maturity		$	882		$	1,370
Adjusted interest rate			561			3,136
Interest only period			1,900			—
Total		$	3,343		$	4,506
The Company generally considers a TDR loan to have defaulted when it reaches 90 days past due. There were two TDRs in the amount of $1.9 million that have been modified during the twelve months ending on December 31, 2014 which have subsequently defaulted during the twelve months ending on December 31, 2014. During the twelve months ended December 31, 2014, we recorded charge offs of $573,000 related to these two loans and as of December 31, 2014 the one remaining loan with a balance of $1,551,000 was on non-accrual status. The loans previously had specific allowances of $555,000. There were no TDRs entered into during 2013 which have subsequently defaulted during 2013. There was one residential one to four family loan with a carrying amount of $1.7 million and one home equity line of credit with a carrying amount of $200,000 that were both modified and determined to be TDRs in 2012 that subsequently defaulted in 2013.
At December 31, 2014 and 2013, $518.4 million and $415.9 million in loans were pledged to secure FHLB advances.

TRANSFERS_AND_SERVICING

TRANSFERS AND SERVICING	12 Months Ended
	Dec. 31, 2014
TRANSFERS AND SERVICING	NOTE 5 – TRANSFERS AND SERVICING
	Certain residential mortgage loans are periodically sold by the Company to the secondary market. Most of these loans are sold without recourse and the Company retains the servicing rights. For loans sold with servicing rights retained, we provide the servicing for the loans on a per-loan fee basis. The Company also periodically sells auto loans to other financial institutions without recourse, and the Company generally provides servicing for these loans. Mortgage loans sold for cash during the years ended December 31, 2014, 2013 and 2012 were $16.0 million, $34.2 million and $97.7 million, respectively with net gains recognized in non-interest income of $348,000, $798,000 and $1,731,000, respectively. Auto loans sold for cash during the years ended December 31, 2014, 2013 and 2012 were $17.5 million, $63.6 million and $99.7 million, respectively with net gains recognized in non-interest income of $138,000, $226,000 and $789,000, respectively. At December 31, 2014 and 2013, residential mortgage loans previously sold and serviced by the Company were $69.5 million and $61.2, respectively. At December 31, 2014 and 2013, auto loans previously sold and serviced by the Company were $94.7 million and $124.8 million, respectively. There were no liabilities incurred during the years ended December 31, 2014 and 2013 in connection with these loan sales.
	On March 16, 2006, seventeen loans with an aggregate principal balance of $10.5 million were sold to another financial institution. The agreement related to this sale contains provisions requiring the Company during the initial 120 months to repurchase any loan that becomes 90 days past due. The Company will repurchase the past due loan for 100 percent of the unpaid principal plus interest to repurchase date. As of December 31, 2014 and 2013, the principal balance of these loans sold with recourse amounted to $1.1 million. The Company has not incurred, nor expects to incur, any losses related to the loans sold with recourse.
	Changes in mortgage servicing rights, which are included in other assets, were as follows:
		Years Ended December 31,
		2014			2013			2012
	Balance at beginning of period	$	411		$	353		$	—
	Capitalization		128			202			421
	Amortization		(75	)		(101	)		(32	)
	Valuation allowance adjustment		12			(43	)		(36	)
	Balance at end of period	$	476		$	411		$	353
	During the years ended December 31, 2014, 2013 and 2012, the Company recorded adjustments to the valuation allowance of $(12,000), $43,000 and $36,000, respectively, for the mortgage servicing rights. As of December 31, 2014, the fair value of mortgage servicing rights approximated carrying value.

PREMISES_AND_EQUIPMENT

PREMISES AND EQUIPMENT	12 Months Ended
	Dec. 31, 2014
PREMISES AND EQUIPMENT	NOTE 6 – PREMISES AND EQUIPMENT
	A summary of the cost and accumulated depreciation of premises and equipment follows:
		December 31,
		2014			2013
	Land	$	161		$	161
	Buildings		3,505			3,331
	Leasehold improvements		2,165			2,152
	Furniture and equipment		6,040			5,925
			11,871			11,569
	Accumulated depreciation		(8,805	)		(8,242	)
		$	3,066		$	3,327
	Depreciation and amortization expense for the years ended December 31, 2014, 2013 and 2012 amounted to $761,000, $716,000 and $517,000, respectively. During the year ended December 31, 2013, we purchased a new telephone system and determined that certain assets related to our previous system had no future economic benefit to the Company and recorded an impairment charge of $41,000 within equipment expense on the consolidated statement of operations.

DEPOSITS

DEPOSITS	12 Months Ended
	Dec. 31, 2014
DEPOSITS	NOTE 7 – DEPOSITS
	The aggregate amount of time deposits in denominations that meet or exceed the FDIC insurance limit of $250,000 at December 31, 2014 and 2013 was $37.1 million and $23.5 million, respectively.
	At December 31, 2014, the scheduled maturities of time deposits are as follows:
	2015	$	62,028
	2016		25,969
	2017		26,375
	2018		68,030
	2019		43,811
		$	226,213
	Included in time deposits are brokered deposits of $85.1 million at December 31, 2014 and $18.7 million at December 31, 2013.

SHORTTERM_BORROWINGS

SHORT-TERM BORROWINGS	12 Months Ended
	Dec. 31, 2014
SHORT-TERM BORROWINGS	NOTE 8 – SHORT-TERM BORROWINGS
	Federal Home Loan Bank Advances
	Fixed rate FHLB advances with an original maturity of less than one year, amounted to $182.0 million and $80.0 million at December 31, 2014 and 2013, respectively, at a weighted average rate of 0.25% and 0.17%, respectively. The Bank also has an available line of credit with the FHLB at an interest rate that adjusts daily. All borrowings from the FHLB are secured by a blanket security agreement on qualified collateral, principally mortgage loans, commercial loans and U.S. government sponsored mortgage backed securities in an aggregate amount equal to outstanding advances.
	Securities Sold Under Agreements to Repurchase
	Securities sold under agreements to repurchase amounted to $1.4 million and $2.1 million at December 31, 2014 and 2013, respectively, mature on a daily basis and are secured by U.S. government sponsored mortgage backed securities. The weighted average interest rate on these agreements was 0.15% at December 31, 2014 and 2013. The obligations to repurchase the securities sold are reflected as a liability in the consolidated balance sheets. The dollar amounts of the securities underlying the agreements remain in the asset accounts. The securities pledged are registered in the Company’s name; however, the securities are held by the designated trustee of the broker. Upon maturity of the agreements, the identical securities pledged as collateral are returned to the Company.

LONGTERM_BORROWINGS

LONG-TERM BORROWINGS	12 Months Ended
	Dec. 31, 2014
LONG-TERM BORROWINGS	NOTE 9 – LONG-TERM BORROWINGS
	Long-term debt at December 31, 2014 and 2013 consists of the following FHLB advances:
		Amount				Weighted Average Rate
		2014		2013		2014			2013
	Fixed rate advances maturing:
	2014		—	$	9,000		—	%		1.26	%
	2015	$	14,100		14,100		1.17	%		1.17	%
	2016		7,000		7,000		1.39	%		1.39	%
	2017		35,000		15,000		1.14	%		0.9	%
	2018		27,000		17,000		1.88	%		1.93	%
	2019		20,000		—		1.89	%		—	%
		$	103,100	$	62,100		1.5	%		1.35	%
	Other borrowed funds consist of the balance of loans sold with recourse (see Note 5).

INCOME_TAXES

INCOME TAXES	12 Months Ended
	Dec. 31, 2014
INCOME TAXES	NOTE 10 – INCOME TAXES
	Allocation of federal and state income taxes between current and deferred portions is as follows:
		Years Ended December 31,
		2014			2013			2012
	Current tax provision:
	Federal	$	2,517		$	1,615		$	401
	State		653			388			59
			3,170			2,003			460
	Deferred tax (benefit) provision:
	Federal		(419	)		(606	)		195
	State		(136	)		(175	)		58
			(555	)		(781	)		253
	Change in valuation allowance		(53	)		(180	)		—
	Total provision for income taxes	$	2,562		$	1,042		$	713
	The reasons for the differences between the statutory federal income tax rate and the effective tax rates are summarized as follows:
		Years Ended December 31,
		2014			2013			2012
	Statutory federal tax rate		34	%		34	%		34	%
	Increase (decrease) resulting from:
	State taxes, net of federal tax benefit		5			4.8			3.7
	Bank-owned life insurance		(3.9	)		(4.1	)		(5.8	)
	Change in valuation allowance		(0.8	)		(6.0	)		—
	Share based compensation		2.9			5.6			1.3
	Other, net		0.2			0.4			0.5
	Effective tax rates		37.4	%		34.7	%		33.7	%
	The components of the net deferred tax asset are as follows:
		Years Ended December 31,
		2014			2013
	Deferred tax assets:
	Employee benefit and deferred compensation plans	$	3,035		$	2,766
	Allowance for loan losses		3,582			3,224
	Depreciation		90			—
	Accrued rent		11			11
	Interest on non-performing loans		8			8
	Stock options		272			144
	Charitable contribution carryover		190			502
	Unrealized loss on securities available for sale		48			140
	ESOP		74			53
	Gross deferred tax assets		7,310			6,848
	Valuation allowance		—			(53	)
			7,310			6,795
	Deferred tax liabilities:
	Mortgage servicing rights		(190	)		(164	)
	Deferred loan origination costs		(934	)		(624	)
	Restricted stock awards		(483	)		(651	)
	Depreciation		—			(110	)
	Unrecognized retirement benefit		(34	)		(14	)
	Other		(27	)		(86	)
			(1,668	)		(1,649	)
	Net deferred tax asset	$	5,642		$	5,146
	A valuation reserve had been established for the income tax effects attributable to the deferred tax assets to limit the federal and state tax benefit related to the charitable contribution carryover.
		Years Ended December 31,
		2014			2013			2012
	Balance at beginning of year	$	(53	)	$	(233	)	$	(233	)
	Reserve for charitable contribution carryforward		—			—			—
	Reduction in valuation allowance		53			180			—
		$	—		$	(53	)	$	(233	)
	The Company does not have any uncertain tax positions at December 31, 2014 or 2013 which require accrual or disclosure. The Company records interest and penalties as part of income tax expense. No interest or penalties were recorded for the years ended December 31, 2014, 2013 and 2012.
	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 the applicable statutes of limitations by the Internal Revenue Service for the years ended December 31, 2011 through 2014. The years open to examination by state taxing authorities vary by jurisdiction; no years prior to 2011 are open.
	In prior years, the Company was allowed a special tax-basis bad debt deduction under certain provisions of the Internal Revenue Code. As a result, retained earnings of the Company as of December 31, 2014 and 2013 includes approximately $3.6 million for which federal and state income taxes have not been provided. If the Company no longer qualifies as a bank as defined in certain provisions of the Internal Revenue Code, this amount will be subject to recapture in taxable income ratably over four (4) years, subject to a combined federal and state tax rate of approximately 40%.

OFFBALANCE_SHEET_ACTIVITIES

OFF-BALANCE SHEET ACTIVITIES	12 Months Ended
	Dec. 31, 2014
OFF-BALANCE SHEET ACTIVITIES	NOTE 11 – OFF-BALANCE SHEET ACTIVITIES
	Credit-Related Financial Instruments
	The Company is a party to credit related 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, standby letters of credit and commercial letters of credit. Such commitments involve, to varying degrees, elements of credit and interest rate risk in excess of the amount recognized in the consolidated balance sheets.
	The Company’s exposure to credit loss is represented by the contractual amount of these commitments. The Company follows the same credit policies in making commitments as it does for on-balance sheet instruments.
	At December 31, 2014 and 2013, the following financial instruments were outstanding whose contract amounts represent credit risk:
		Contract Amount
		2014		2013
	Commitments to grant loans	$	21,594	$	27,588
	Unfunded commitments under lines of credit		183,512		132,825
	Unadvanced portion of construction loans		13,466		14,066
	Standby letters of credit		177		80
	Commitments to purchase loans		32,883		15,383
	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. The commitments for equity lines of credit may expire without being drawn upon. Therefore, the total commitment amounts do not necessarily represent future cash requirements. The amount of collateral obtained, if it is deemed necessary by the Company, is based on management’s credit evaluation of the customer.
	Unfunded commitments under commercial lines-of-credit, revolving credit lines and overdraft protection agreements are commitments for possible future extensions of credit to existing customers. These lines-of-credit are uncollateralized and usually do not contain a specified maturity date and ultimately may not be drawn upon to the total extent to which the Company is committed.
	Standby letters-of-credit are conditional commitments issued by the Company to guarantee the performance of a customer to a third party. Those letters-of-credit are primarily issued to support public and private borrowing arrangements. Essentially all letters of credit issued have expiration dates within one year. The credit risk involved in issuing letters-of-credit is essentially the same as that involved in extending loan facilities to customers. The Company generally holds collateral supporting those commitments.
	Commitments to purchase loans are conditional commitments issued by the Company to purchase loans through select correspondent mortgage companies who originate and sell loans as part of their operations. Typically the commitment to purchase is valid as long as there is no violation of any condition established in the correspondent contract. Commitments generally have fixed expiration dates or other termination clauses and generally do not require payment of a fee.

COMMITMENTS_AND_CONTINGENT_LIA

COMMITMENTS AND CONTINGENT LIABILITIES	12 Months Ended
	Dec. 31, 2014
COMMITMENTS AND CONTINGENT LIABILITIES	NOTE 12 – COMMITMENTS AND CONTINGENT LIABILITIES
	Pursuant to the terms of noncancelable lease agreements in effect at December 31, 2014, pertaining to banking premises and equipment, future minimum rent commitments under various operating leases are as follows:
	2015	$	427
	2016		413
	2017		322
	2018		276
	2019		281
	Thereafter		503
		$	2,222
	Certain leases contain provisions for escalation of minimum lease payments contingent upon increases in real estate taxes and percentage increases in the consumer price index. Also, certain leases contain options to extend for periods from one to ten years. The cost of such rentals is not included above. Total rent expense for the years ended December 31, 2014, 2013 and 2012 amounted to $407,000, $353,000 and $291,000, respectively.

LEGAL_CONTINGENCIES

LEGAL CONTINGENCIES	12 Months Ended
	Dec. 31, 2014
LEGAL CONTINGENCIES	NOTE 13 – LEGAL CONTINGENCIES
	In the normal course of business, there are various outstanding legal proceedings. In the opinion of management, after consulting with legal counsel, the consolidated financial position and results of operations of the Company are not expected to be affected materially by the outcome of such proceedings.

MINIMUM_REGULATORY_CAPITAL_REQ

MINIMUM REGULATORY CAPITAL REQUIREMENTS	12 Months Ended
	Dec. 31, 2014
MINIMUM REGULATORY CAPITAL REQUIREMENTS	NOTE 14 – MINIMUM REGULATORY CAPITAL REQUIREMENTS
	The Company’s primary source of cash is dividends from the Bank. The Bank is subject to certain restrictions on the amount of dividends that it may declare without prior regulatory approval. In addition, the dividends declared cannot be in excess of the amount which would cause the Bank to fall below the minimum required for capital adequacy purposes.
	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 Bank’s financial statements. Under capital adequacy guidelines and the regulatory framework for prompt corrective action, the Company and the 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 bank holding companies.
	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 to average assets (as defined). Management believes, as of December 31, 2014 and 2013, that the Company and the Bank meet all capital adequacy requirements to which they are subject.
	As of December 31, 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, an institution must maintain minimum total risk-based, Tier 1 risk-based and Tier 1 leverage ratios as set forth in the following tables. There are no conditions or events since the notification that management believes have changed the Bank’s category. The Company’s and the Bank’s actual capital amounts and ratios as of December 31, 2014 and 2013 are also presented in the following table.
		Actual					Minimum For Capital					Minimum To Be Well
							Adequacy Purposes					Capitalized Under
												Prompt Corrective
												Action Provisions
		Amount		Ratio			Amount		Ratio			Amount		Ratio
	As of December 31, 2014:
	Total Capital (to Risk Weighted Assets)
	Consolidated	$	145,653		12.99	%	$	89,718		8	%		N/A		N/A
	Belmont Savings Bank		137,139		12.23	%		89,673		8	%	$	112,092		10	%
	Tier 1 Capital (to Risk Weighted Assets)
	Consolidated	$	136,684		12.19	%	$	44,859		4	%		N/A		N/A
	Belmont Savings Bank		128,170		11.43	%		44,837		4	%	$	67,255		6	%
	Tier 1 Capital (to Average Assets)
	Consolidated	$	136,684		10.05	%	$	54,417		4	%		N/A		N/A
	Belmont Savings Bank		128,170		9.42	%		54,403		4	%	$	68,003		5	%
	As of December 31, 2013:
	Total Capital (to Risk Weighted Assets)
	Consolidated	$	138,146		16.3	%	$	67,806		8	%		N/A		N/A
	Belmont Savings Bank		117,849		13.91	%		67,782		8	%	$	84,728		10	%
	Tier 1 Capital (to Risk Weighted Assets)
	Consolidated	$	130,074		15.35	%	$	33,903		4	%		N/A		N/A
	Belmont Savings Bank		109,777		12.96	%		33,891		4	%	$	50,837		6	%
	Tier 1 Capital (to Average Assets)
	Consolidated	$	130,074		12.59	%	$	41,323		4	%		N/A		N/A
	Belmont Savings Bank		109,777		10.62	%		41,334		4	%	$	51,668		5	%
	Basel III:
	On July 2, 2013, the Federal Reserve Bank (FRB) approved the final rules implementing the Basel Committee on Banking Supervision’s capital guidelines for U.S. banks. On July 9, 2013, the FDIC also approved, as an interim final rule, the regulatory capital requirements for U.S. banks, following the actions of the FRB. On April 8, 2014, the FDIC adopted as final its interim final rule, which is identical in substance to the final rules issued by the FRB in July 2013. Under the final rules, minimum requirements will increase for both the quantity and quality of capital held by the Bank. The rules include a new common equity Tier 1 capital risk-weighted assets minimum ratio of 4.5%, raise the minimum ratio of Tier 1 capital to risk-weighted assets from 4.0% to 6.0%, require a minimum ratio of Total capital to risk-weighted assets of 8.0%, and require a minimum Tier 1 leverage ratio of 4.0%. A new capital conservation buffer, comprised of common equity Tier 1 capital, is also established above the regulatory minimum capital requirements. This capital conservation buffer will be phased in beginning January 1, 2016 at 0.625% of risk-weighted assets and increase each subsequent year by an additional 0.625% until reaching its final level of 2.5% on January 1, 2019. Strict eligibility criteria for regulatory capital instruments were also implemented under the final rules.
	The phase-in period for the final rules will begin for the Bank on January 1, 2015, with full compliance with all of the final rule’s requirements phased in over a multi-year schedule and should be fully phased-in by January 1, 2019. Management believes that the Bank’s capital levels will remain characterized as “well-capitalized” under the new rules.
	Stock Repurchase Plans. From time to time, the Company’s board of directors has authorized stock repurchase plans. In general, stock repurchase plans allow the Company to proactively manage its capital position and return excess capital to shareholders. During the twelve months ended December 31, 2013, the Company purchased 476,622 shares of its common stock for $6.5 million and completed the first stock repurchase program. As of December 31, 2014 and December 31, 2013, the Company had an active stock repurchase plan to repurchase up to 500,000 shares of the Company’s common stock. During the twelve months ended December 31, 2014 and December 31, 2013, no shares were repurchased under the second active repurchase plan.

EMPLOYEE_BENEFIT_PLANS

EMPLOYEE BENEFIT PLANS	12 Months Ended
	Dec. 31, 2014
EMPLOYEE BENEFIT PLANS	NOTE 15 – EMPLOYEE BENEFIT PLANS
	Supplemental Retirement Plans
	The Company has supplemental retirement plans for eligible executive officers that provide for a lump sum benefit upon termination of employment at or after age 55 and completing 10 or more years of service (certain reduced benefits are available prior to attaining age 55 or fewer than 10 years of service), subject to certain limitations as set forth in the agreements. The present value of these future payments is being accrued over the service period. The estimated liability at December 31, 2014 and 2013 relating to these plans was $1.8 million and $1.5 million, respectively. The discount rate used to determine the Company’s obligation was 4.0% in 2014 and 5.0% in 2013. The projected rate of salary increase was 3.0% in 2014 and 2013.
	The Company has a supplemental retirement plan for eligible directors that provides for monthly benefits based upon years of service to the Company, subject to certain limitations as set forth in the agreements. The present value of these future payments is being accrued over the estimated period of service. The estimated liability at December 31, 2014 and 2013 relating to this plan was $648,000 and $553,000, respectively. The discount rate used to determine the Company’s obligation was 4.0% in 2014 and 5.0% in 2013.
	Effective October 1, 2010, the Company established the Belmont Savings Bank Supplemental Executive Retirement Plan (Plan). The purpose of the Plan is to permit certain employees of the Company to receive supplemental retirement income from the Company. At December 31, 2014 and 2013, there were four and three participants in the Plan, respectively. Participants are fully vested after the completion of between five and ten years of service. The plan is unfunded. Information pertaining to the activity in the plan is as follows:
		Years Ended December 31,
		2014			2013
	Change in benefit obligation:
	Benefit obligation at beginning of year	$	729		$	538
	Service cost		258			242
	Interest cost		40			21
	Establish prior service cost base		63			—
	Actuarial gain		(105	)		(72	)
	Benefit obligation at end of year		985			729
	Funded status at end of year	$	(985	)	$	(729	)
	Accrued pension benefit		(1,069	)		(765	)
	Accumulated benefit obligation	$	857		$	670
	The assumptions used to determine the benefit obligation are as follows:
		December 31,
		2014			2013
	Discount rate		4	%		5	%
	Rate of compensation increase		3	%		3	%
	The components of net periodic pension cost are as follows:
		December 31,
		2014			2013
	Service cost	$	258		$	242
	Interest cost		40			21
	Amortization of prior service cost		6			—
	Net periodic cost	$	304		$	263
	Other changes in benefit obligations recognized in other comprehensive income are as follows:
		December 31,
		2014			2013
	Establish prior service cost base	$	63		$	—
	Amortization of prior service cost		(6	)		—
	Net actuarial gain		(105	)		(72	)
	Total recognized in other comprehensive income	$	(48	)	$	(72	)
	The assumptions used to determine net periodic pension cost are as follows:
		December 31,
		2014			2013
	Discount rate		5	%		4	%
	Rate of compensation increase		3	%		3	%
	Amounts recognized in accumulated other comprehensive loss, before tax effect, consist of the following:
		December 31,
		2014			2013
	Unrecognized prior service cost	$	57		$	—
	Unrecognized net gain		(141	)		(36	)
		$	(84	)	$	(36	)
	The estimated net actuarial gain and prior service cost that will be (accreted) amortized from accumulated other comprehensive loss into net periodic pension expense during the year ending December 31, 2015 are $(8,000) and $6,000, respectively.
	The Company does not expect to contribute to the Plan in 2015.
	Estimated future benefit payments, which reflect expected future service, as appropriate, are as follows:
	Year Ending	Amount
	December 31,
	2015	$	—
	2016		—
	2017		101
	2018		101
	2019		101
	Years 2020-2024	$	1,298
	Total supplemental retirement plan expense amounted to $688,000, $405,000 and $507,000 for the years ended December 31, 2014, 2013 and 2012, respectively.
	Incentive Compensation Plan
	The Incentive Compensation Plan is a discretionary annual cash-based incentive plan that is an integral part of the participant’s total compensation package and supports the continued growth and profitability of Belmont Savings Bank. Each year participants are awarded for the achievement of certain performance objectives on a company-wide and individual basis. Compensation expense recognized was $1.8 million, $1.4 million and $1.3 million for the years ended December 31, 2014, 2013 and 2012, respectively.
	Defined Contribution Plan
	The Company sponsors a 401(k) plan covering substantially all employees meeting certain eligibility requirements. Under the provisions of the plan, employees are able to contribute up to an annual limit of the lesser of 75% of eligible compensation or the maximum allowed by the Internal Revenue Service. The Company’s contributions for the years ended December 31, 2014, 2013 and 2012 totaled $757,000, $729,000 and $635,000, respectively.
	Deferred Compensation Plan
The Company has a deferred compensation plan by which selected employees and directors of the Company are entitled to elect, prior to the beginning of each year, to defer the receipt of an amount of their compensation for the forthcoming year. On April 1, 2013, the Company entered into deferred compensation agreements with certain Directors and employees of the Company. Each agreement allows for the individual to elect to defer a portion of his or her compensation to an individual deferred compensation account established by Belmont Savings Bank. Prior to April 1, 2013, each individual’s deferred compensation account balance was credited with earnings on a monthly basis based on the five year certificate of deposit yield as published by the Wall Street Journal. In April 2013, Belmont Savings Bank created a Rabbi Trust, or grantor trust. The Rabbi Trust is maintained by the Company primarily for purposes of providing deferred compensation for certain Directors and employees of the Company and replaced the existing agreements for non-retired participants with a Belmont Savings Bank Deferred Compensation Plan. The new plan is administered by a third party and permits participants to select from a number of investment options for the investment of their account balances. Each participant is always 100% vested in his or her deferred compensation account balance. Individuals that were retired as of April 1, 2013 continue to participate in the existing Salary Deferral Plan. As of December 31, 2014 and December 31, 2013, the recorded liability relating to the Rabbi Trust was $2.3 million and $2.2 million, respectively. The recorded liability at December 31, 2014 and 2013 relating to the Salary Deferral Plan was $14,000 and $91,000, respectively.
Capital Appreciation Plan
Effective September 30, 2010, the Company established the Capital Appreciation Plan. The purpose of this plan is to attract, retain, and motivate certain key employees and directors of the Company. Eligible participants may receive an award based on capital appreciation of the Bank and the Bank’s return on average assets, entitling the employee or director to a specific percentage of the Employee or Trustee Capital Appreciation Pool as outlined in the plan. The vesting period ended on June 30, 2014 and the plan was completed. Participants were paid lump sums totaling $266,000. The Company recognized $61,000, $113,000 and $92,000 of expense in relation to the plan during the years ended December 31, 2014, 2013 and 2012, respectively.
Employee Stock Ownership Plan
The Company maintains an Employee Stock Ownership Plan (“ESOP”) to provide eligible employees the opportunity to own Company stock. This plan is a tax-qualified retirement plan for the benefit of all Company employees. Contributions are allocated to eligible participants on the basis of compensation, subject to federal tax law limits.
The Company contributed funds to a subsidiary to enable it to grant a loan to the ESOP for the purchase of 458,643 shares of the Company’s common stock at a price of $10.00 per share. The loan obtained by the ESOP from the Company’s Subsidiary to purchase Company common stock is payable annually over 30 years at a rate per annum equal to the Prime Rate (3.25% at December 31, 2014). Loan payments are principally funded by cash contributions from the Company. The loan is secured by the shares purchased, which are held in a suspense account for allocation among 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 used as collateral to secure the loan are released and available for allocation to eligible employees as the principal and interest on the loan is paid.
At December 31, 2014, the remaining principal balance on the ESOP debt is payable as follows:
Years Ending	Amount
December 31,
2015	$	102
2016		105
2017		109
2018		113
2019		116
Thereafter		3,730
	$	4,275
Shares held by the ESOP include the following:
	December 31,
	2014			2013
Unallocated		408,955			424,271
Allocated		47,295			34,372
		456,250			458,643
The fair value of unallocated shares was approximately $7.6 million at December 31, 2014 and $6.4 million at December 31, 2013. Total compensation expense recognized in connection with the ESOP for the years ended December 31, 2014, 2013 and 2012 was $268,000, $209,000 and $185,000, respectively.
Severance Agreements
The Company has entered into employment agreements and change in control agreements with certain executive officers which would provide the executive officers with severance payments based on salary, and the continuation of other benefits, upon a change in control as defined in the agreements.

STOCK_BASED_COMPENSATION

STOCK BASED COMPENSATION	12 Months Ended
	Dec. 31, 2014
STOCK BASED COMPENSATION	NOTE 16 – STOCK BASED COMPENSATION
	On November 14, 2012, the stockholders of BSB Bancorp, Inc. approved the BSB Bancorp, Inc. 2012 Equity Incentive Plan.
	The following table presents the amount of cumulatively granted stock options and restricted stock awards, net of forfeitures, through December 31, 2014 under the BSB Bancorp, Inc. 2012 Equity Incentive Plan:
	Authorized				Authorized				Authorized				Cumulative Granted								Outstanding
	Stock				Restricted				Total				Net of Forfeitures								Total
	Option Awards				Stock Awards								Stock				Restricted
													Option Awards				Stock Awards
		917,286				366,914				1,284,200				886,040				363,570				1,249,610
	The following table presents the pre-tax expense associated with stock option and restricted stock awards and the related tax benefits recognized:
			For the year ended
			December 31,
			2014				2013
	Stock based compensation expense
	Stock options		$	847			$	778
	Restricted stock awards			906				869
	Total stock based award expense		$	1,753			$	1,647
	Related tax benefits recognized in earnings		$	511			$	481
	No cash was paid by the Company to settle equity instruments granted under stock-based compensation arrangements during the year ended December 31, 2014.
	Total compensation cost related to non-vested awards not yet recognized and the weighted average period (in years) over which it is expected to be recognized is as follows:
			As of December 31, 2014
			Amount				Weighted
							average period
	Stock options		$	2,195				3
	Restricted stock			2,313				2.9
	Total		$	4,508
	The Company granted 23,760, 10,000, and 10,414 stock option awards on January 8, 2014, May 1, 2014 and October 8, 2014, respectively. The fair value of the stock options granted was estimated on the date of the grant using the Black-Scholes option pricing model with the following assumptions used:
		•		Expected volatility is based on the standard deviation of the historical volatility of the daily adjusted closing price of the Company’s shares.
		•		Expected term represents the period of time that the option is expected to be outstanding. The Company determined the expected life using the “Simplified Method.”
		•		Expected dividend yield is determined based on management’s expectations regarding issuing dividends in the foreseeable future.
		•		The risk-free interest rate is based on the U.S. Treasury yield curve in effect at the time of grant for a period equivalent to the expected life of the option.
		•		The stock-based compensation expense recognized in earnings is based on the amount of awards ultimately expected to vest, therefore a forfeiture assumption is estimated at the time of grant and revised, if necessary, in subsequent periods if actual forfeitures differ from those estimates. Stock-based compensation expense recognized in 2014 and 2013 has been reduced for annualized estimated forfeitures of 7% for grants to employees, based on historical experience.
			Year ended
			December 31,
			2014
	Date of grant			1/8/14				5/1/14				10/8/14
	Exercise price		$	15.26			$	17.43			$	18.31
	Vesting period (1)			5 years				5 years				5 years
	Expiration date			1/8/24				5/1/24				10/8/24
	Expected volatility			15.64	%			15.98	%			15.69	%
	Expected term			6.5 years				6.5 years				6.5 years
	Expected dividend yield			0	%			0	%			0	%
	Risk free interest rate			2.27	%			2.07	%			1.91	%
	Fair value		$	3.44			$	3.87			$	3.93
	1-	Vesting period begins on the date of grant
	The option exercise price is derived from trading value on the date of grant.
	A summary of the status of the Company’s Stock Option and Restricted Stock Awards for the year ended December 31, 2014 is presented in the tables below:
			Outstanding and exercisable												Non-vested
			Stock option				Weighted average				Weighted average				Stock option				Weighted average				Weighted average
			awards				exercise price				remaining				awards				grant date				remaining
											contractual term								fair value				contractual term
	Balance at January 1, 2014			162,370			$	12.04				8.91				690,663			$	4.71				8.95
	Granted			—				—								44,174				3.65				9.28
	Exercised			(23,076	)			12.16				7.97				—				—				—
	Vested			144,248				12.12				7.95				(144,248	)			4.71				7.95
	Forfeited			(917	)			12.04				7.92				(10,250	)			3.93				9.78
	Balance at December 31, 2014			282,625			$	12.08				8.42				580,339			$	4.65				8.81
			Non-vested
			restricted stock
			awards
	Balance at January 1, 2014			287,648
	Granted			4,000
	Vested			(74,554	)
	Balance at December 31, 2014			217,094

EARNINGS_PER_SHARE

EARNINGS PER SHARE	12 Months Ended
	Dec. 31, 2014
EARNINGS PER SHARE	NOTE 17 – EARNINGS PER SHARE
	Earnings per share consisted of the following components for the years ended December 31, 2014, 2013 and 2012:
		December 31,			December 31,			December 31,
		2014			2013			2012
	Net income	$	4,291		$	1,960		$	1,401
	Undistributed earnings attributable to participating securities		(139	)		(79	)		(5	)
	Net income available to common stockholders	$	4,152		$	1,881		$	1,396
	Weighted average shares outstanding, basic		8,361,880			8,419,437			8,727,615
	Effect of dilutive shares		91,547			—			—
	Weighted average shares outstanding, assuming dilution		8,453,427			8,419,437			8,727,615
	Basic EPS	$	0.5		$	0.22		$	0.16
	Effect of dilutive shares		(0.01	)		—			—
	Diluted EPS	$	0.49		$	0.22		$	0.16
	For 2014, 2013 and 2012, average options to purchase 19,368, 850,180 and 79,446 shares of common stock were outstanding, respectively, but not included in the computation of EPS because they were antidilutive under the treasury stock method.

RELATED_PARTY_TRANSACTIONS

RELATED PARTY TRANSACTIONS	12 Months Ended
	Dec. 31, 2014
RELATED PARTY TRANSACTIONS	NOTE 18 – RELATED PARTY TRANSACTIONS
	In the ordinary course of business, the Bank has granted loans to principal officers and directors and their affiliates. As of December 31, 2014 and 2013, related party loans were not significant.

RESTRICTIONS_ON_DIVIDENDS_LOAN

RESTRICTIONS ON DIVIDENDS, LOANS AND ADVANCES	12 Months Ended
	Dec. 31, 2014
RESTRICTIONS ON DIVIDENDS, LOANS AND ADVANCES	NOTE 19 – 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 for dividends which may be paid in any calendar year cannot exceed the Bank’s net income for the current year, plus the Bank’s net income retained for the two previous years, without regulatory approval. Loans or advances are limited to 10 percent of the Bank’s capital stock and surplus on a secured basis.
	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.

FAIR_VALUES_OF_ASSETS_AND_LIAB

FAIR VALUES OF ASSETS AND LIABILITIES	12 Months Ended
	Dec. 31, 2014
FAIR VALUES OF ASSETS AND LIABILITIES	NOTE 20 – FAIR VALUES OF ASSETS AND LIABILITIES
	Determination of Fair Value
	The fair value of an asset or liability 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. The Company uses prices and inputs that are current as of the measurement date, including during periods of market dislocation. In periods of market dislocation, the observability of prices and inputs may be reduced for many instruments. This condition could cause an instrument to be reclassified from one level to another. Fair value is best determined based upon quoted market prices. However, in many instances, there are no quoted market prices for the Company’s various assets and liabilities. In cases where quoted market prices are not available, fair values are based on estimates using present value of cash flows or other valuation techniques. Those techniques are significantly affected by the assumptions used, including the discount rate and estimates of future cash flows. Accordingly, the fair value estimates may not be realized in an immediate settlement of the instrument.
	The Company groups its assets and liabilities measured at fair value in three levels, based on the markets in which the assets and liabilities are traded and the observability and reliability of the assumptions used to determine fair value.
	Level 1 - Level 1 inputs are quoted prices (unadjusted) in active markets for identical assets or liabilities that the reporting entity has the ability to access at the measurement date.
	Level 2 - Level 2 inputs are inputs other than quoted prices included within Level 1 that are observable for the asset or liability, either directly or indirectly.
	Level 3 - Level 3 inputs are unobservable inputs for the asset or liability.
	For assets and liabilities, fair value is based upon the lowest level of observable input that is significant to the fair value measurement.
	In general, fair value is based upon quoted market prices, where available. If such quoted market prices are not available, fair value is based upon models that primarily use, as inputs, observable market based parameters. The Company’s valuation methodologies may produce a fair value calculation that may not be indicative of net realizable value or reflective of future fair values. While management believes the Company’s valuation methodologies are appropriate and consistent with other market participants, the use of different methodologies or assumptions to determine the fair value of certain financial instruments could result in a different estimate of fair value at the reporting date. Furthermore, the reported fair value amounts have not been comprehensively revalued since the presentation dates, and therefore, estimates of fair value after the balance sheet date may differ significantly from the amounts presented herein. A more detailed description of the valuation methodologies used for assets and liabilities measured at fair value is set forth below. A description of the valuation methodologies used for instruments measured at fair value, as well as the general classification of such instruments pursuant to the valuation hierarchy, is set forth below. These valuation methodologies were applied to all of the Company’s financial assets and financial liabilities carried at fair value for December 31, 2014 and 2013. There were no significant transfers between level 1 and level 2 of the fair value hierarchy during the year ended December 31, 2014.
	Financial Assets and Financial Liabilities: Financial assets and financial liabilities measured at fair value on a recurring basis include the following:
	Securities Available for Sale: The Company’s investment in mortgage-backed securities and other debt securities is generally classified within level 2 of the fair value hierarchy. For these securities, the Company obtains fair value measurements from independent pricing services. The fair value measurements consider observable data that may include reported trades, dealer quotes, market spreads, cash flows, the U.S. treasury yield curve, trading levels, market consensus prepayment speeds, credit information and the instrument’s terms and conditions.
	Rabbi Trust Investments: Rabbi Trust investments consist primarily of cash and cash equivalents, mutual funds and both U.S. government agency and corporate obligations, and were recorded at fair value and included in other assets. The purpose of these Rabbi Trust investments is to fund certain director and executive non-qualified retirement benefits and deferred compensation. For cash and cash equivalents, which have maturities of 90 days or less, their carrying amounts reported in the consolidated balance sheets approximate fair value and were categorized as Level 1. The fair value of other U.S. government agency and corporate obligations was estimated using either a matrix or benchmarks for similar securities. The inputs used include benchmark yields, reported trades, broker/dealer quotes, and issuer spreads. These securities were categorized as Level 2. The equity securities and other exchange-traded funds were valued based on quoted prices from the market. The equities and exchange-traded funds traded in an active market were categorized as Level 1.
	The following table summarizes financial assets measured at fair value on a recurring basis as of December 31, 2014 and 2013, segregated by the level of the valuation inputs within the fair value hierarchy utilized to measure fair value:
		Level 1		Level 2		Level 3		Total
								Fair Value
	At December 31, 2014
	Securities available-for-sale
	Corporate debt securities	$	—	$	22,079	$	—	$	22,079
	Trading securities
	Rabbi trust investments		2,336		—		—		2,336
	Totals	$	2,336	$	22,079	$	—	$	24,415
		Level 1		Level 2		Level 3		Total
								Fair Value
	At December 31, 2013
	Securities available-for-sale
	Corporate debt securities	$	—	$	21,921	$	—	$	21,921
	Trading securities
	Rabbi trust investments		2,181		53		—		2,234
	Totals	$	2,181	$	21,974	$	—	$	24,155
	Certain financial assets and financial liabilities are measured at fair value on a nonrecurring basis; that is, the instruments are not measured at fair value on an ongoing basis but are subject to fair value adjustments in certain circumstances (for example, when there is evidence of impairment). Financial assets measured at fair value on a non-recurring basis during the reported periods include certain impaired loans reported at the fair value of the underlying collateral. Fair value was measured using appraised values of collateral and adjusted as necessary by management based on unobservable inputs for specific properties. However, the choice of observable data is subject to significant judgment, and there are often adjustments based on judgment in order to make observable data comparable and to consider the impact of time, the condition of properties, interest rates, and other market factors on current values. Additionally, commercial real estate appraisals frequently involve discounting of projected cash flows, which relies inherently on unobservable data. Therefore, real estate collateral related nonrecurring fair value measurement adjustments have generally been classified as Level 3. Estimates of fair value used for other collateral supporting commercial loans generally are based on assumptions not observable in the marketplace and therefore such valuations have been classified as Level 3.
	The following table presents certain impaired loans that were remeasured and reported at fair value through a specific valuation allowance allocation of the allowance for loan losses based upon the fair value of the underlying collateral at December 31, 2014 and 2013:
		December 31, 2014
		Level 1		Level 2		Level 3
	Impaired loans	$	—	$	—	$	1,951
	Totals	$	—	$	—	$	1,951
		31-Dec-13
		Level 1		Level 2		Level 3
	Impaired loans	$	—	$	—	$	3,199
	Totals	$	—	$	—	$	3,199
	Non-Financial Assets and Non-Financial Liabilities: The Company has no non-financial assets or non-financial liabilities measured at fair value on a recurring basis. Certain non-financial assets measured at fair value on a non-recurring basis include foreclosed assets (upon initial recognition or subsequent impairment). Non-financial assets measured at fair value on a non-recurring basis during the reported periods include certain foreclosed assets which, upon initial recognition, were remeasured and reported at fair value through a charge-off to the allowance for loan losses and certain foreclosed assets which, subsequent to their initial recognition, were remeasured at fair value through a write-down included in other non-interest expense. Non-financial assets also include mortgage servicing right assets that are remeasured and reported at the lower of cost or fair value. The following tables (in thousands) present the non-financial assets that were re-measured and reported at the lower of cost or fair value at the periods indicated:
		December 31, 2014
		Level 1		Level 2		Level 3
	Mortgage servicing rights	$	—	$	—	$	476
	Totals	$	—	$	—	$	476
		31-Dec-13
		Level 1		Level 2		Level 3
	Mortgage servicing rights	$	—	$	—	$	411
	Totals	$	—	$	—	$	411
	There were no foreclosed assets at December 31, 2014 or 2013.
	ASC Topic 825, “Financial Instruments,” requires disclosure of the fair value of financial assets and financial liabilities, including those financial assets and financial liabilities that are not measured and reported at fair value on a recurring basis or non-recurring basis. The methodologies for estimating the fair value of financial assets and financial liabilities that are measured at fair value on a recurring or non-recurring basis are discussed above. The estimated fair value approximates carrying value for cash and cash equivalents, FHLB stock, accrued interest, securities sold under agreements to repurchase, and mortgagors’ escrow accounts. The methodologies for other financial assets and financial liabilities are discussed below:
	Securities held to maturity-The fair values presented are based on quoted market prices, where available. If quoted market prices are not available, fair values are based on quoted market prices of comparable instruments and/or discounted cash flow analyses.
	Loans- For variable-rate loans that reprice frequently and with no significant change in credit risk, fair values are based on carrying values. The fair values for other loans are estimated using discounted cash flow analyses, using interest rates currently being offered for loans with similar terms to borrowers of similar credit quality.
	Deposits- The fair values disclosed for demand deposits (e.g., interest and non-interest checking, passbook savings and money market accounts) are, by definition, equal to the amount payable on demand at the reporting date (i.e., their carrying amounts). Fair values for fixed-rate certificate accounts are estimated using a discounted cash flow calculation that applies interest rates currently being offered on certificates to a schedule of aggregated expected monthly maturities on certificate accounts.
	FHLB advances- The fair values of the Company’s FHLB advances are estimated using discounted cash flow analyses based on the current incremental borrowing rates in the market for similar types of borrowing arrangements.
	Summary of Fair Values of Financial Instruments not Carried at Fair Value
	The estimated fair values, and related carrying or notional amounts, of the Company’s financial instruments are as follows:
		December 31, 2014
		Carrying		Fair		Level 1		Level 2		Level 3
		Amount		Value
	Financial assets:
	Cash and cash equivalents	$	51,767	$	51,767	$	51,767	$	—	$	—
	Interest-bearing time deposits with other banks		131		132		—		132		—
	Held-to-maturity securities		118,528		119,447		—		119,447		—
	Federal Home Loan Bank stock		13,712		13,712		—		13,712		—
Loans, net		1,179,399		1,170,663		—		—		1,170,663
Accrued interest receivable		2,977		2,977		2,977		—		—
Financial liabilities:
Deposits		984,562		987,353		758,349		229,004		—
Federal Home Loan Bank advances		285,100		285,266		—		285,266		—
Securities sold under agreements to repurchase		1,392		1,392		—		1,392		—
Other borrowed funds		1,067		1,056		—		1,056		—
Accrued interest payable		961		961		961		—		—
Mortgagor’s escrow accounts		1,726		1,726		—		1,726		—
	December 31, 2013
	Carrying		Fair		Level 1		Level 2		Level 3
	Amount		Value
Financial assets:
Cash and cash equivalents	$	38,042	$	38,042	$	38,042	$	—	$	—
Interest-bearing time deposits with other banks		119		119		—		119		—
Held-to-maturity securities		119,776		118,981		—		118,981		—
Federal Home Loan Bank stock		7,712		7,712		—		7,712		—
Loans, net		839,013		833,423		—		—		833,423
Accrued interest receivable		2,241		2,241		2,241		—		—
Financial liabilities:
Deposits		764,753		767,494		618,570		148,924		—
Federal Home Loan Bank advances		142,100		141,960		—		141,960		—
Securities sold under agreements to repurchase		2,127		2,127		—		2,127		—
Other borrowed funds		1,113		1,113		—		1,113		—
Accrued interest payable		683		683		683		—		—
Mortgagor’s escrow accounts		1,054		1,054		—		1,054		—

COMPREHENSIVE_INCOME

COMPREHENSIVE INCOME	12 Months Ended
	Dec. 31, 2014
COMPREHENSIVE INCOME	NOTE 21 – COMPREHENSIVE INCOME
			Year Ended December 31, 2014
			Pre Tax			Tax			After Tax
			Amount			Expense			Amount
	Securities available-for-sale:
	Change in unrealized gain/loss during the period		$	230		$	(92	)	$	138
	Reclassification adjustment for net gains included in net income1			—			—			—
	Total securities available for sale			230			(92	)		138
	Defined benefit post-retirement benefit plans:
	Change in unrecognized pension plan benefit			48			(20	)		28
	Total defined-benefit post-retirement benefit plans			48			(20	)		28
	Total other comprehensive income		$	278		$	(112	)	$	166
			Year Ended December 31, 2013
			Pre Tax			Tax (Expense)			After Tax
			Amount			Benefit			Amount
	Securities available-for-sale:
	Change in unrealized gain/loss during the period		$	(454	)	$	173		$	(281	)
	Reclassification adjustment for net gains included in net income1			(34	)		14			(20	)
	Total securities available for sale			(488	)		187			(301	)
	Defined benefit post-retirement benefit plans:
	Change in the actuarial gain/loss			72			(27	)		45
	Total defined-benefit post-retirement benefit plans			72			(27	)		45
	Total other comprehensive loss		$	(416	)	$	160		$	(256	)
			Year Ended December 31, 2012
			Pre Tax			Tax (Expense)			After Tax
			Amount			Benefit			Amount
	Securities available-for-sale:
	Change in unrealized gain/loss during the period		$	138		$	(47	)		91
	Reclassification adjustment for net gains included in net income1			—			—			—
	Total securities available for sale			138			(47	)		91
	Defined benefit post-retirement benefit plans:
	Change in the actuarial gain/loss			(28	)		10			(18	)
	Total defined-benefit post-retirement benefit plans			(28	)		10			(18	)
	Total other comprehensive income		$	110		$	(37	)	$	73
	1-	Reclassification adjustments are comprised of realized security gains and losses. The gains and losses have been reclassified out of accumulated other comprehensive loss and have affected certain lines in the consolidated statements of operations as follows; the pre-tax amount is included in net gain on sales and calls of securities, the tax expense amount is included in income tax expense and the after tax amount is included in net income.
	The components of accumulated other comprehensive loss, included in stockholders’ equity, are as follows:
			December 31, 2014			December 31, 2013
	Net unrealized holding loss on available-for-sale securities, net of tax		$	(72	)	$	(210	)
	Unrecognized benefit pertaining to defined benefit plan, net of tax			50			22
	Accumulated other comprehensive loss		$	(22	)	$	(188	)

CONDENSED_FINANCIAL_STATEMENTS

CONDENSED FINANCIAL STATEMENTS OF PARENT COMPANY	12 Months Ended
	Dec. 31, 2014
CONDENSED FINANCIAL STATEMENTS OF PARENT COMPANY	NOTE 22 – CONDENSED FINANCIAL STATEMENTS OF PARENT COMPANY
	The following condensed financial statements are for the Parent Company only and should be read in conjunction with the consolidated financial statements of the Company.
	Condensed Balance Sheets
		December 31,
		2014			2013
	Assets
	Cash and cash equivalents held at Belmont Savings Bank	$	2,754		$	14,967
	Investment in Belmont Savings Bank		128,495			109,890
	Investment in BSB Funding Corp.		4,867			4,783
	Deferred tax asset		190			500
	Other assets		761			336
	Total assets	$	137,067		$	130,476
	Liabilities and Stockholders’ Equity
	Accrued expenses		41			55
	Other liabilities		16			—
	Total liabilities		57			55
	Stockholders’ equity		137,010			130,421
	Total liabilities and stockholders’ equity	$	137,067		$	130,476
	Condensed Statements of Operations
		Years Ended December 31,
		2014			2013			2012
	Interest and dividend income:
	Interest on cash equivalents	$	11		$	27		$	42
	Dividends from subsidiaries		—			—			—
	Total interest and dividend income		11			27			42
	Interest expense:		—			—			—
	Net interest and dividend income		11			27			42
	Non-interest income		—			—			—
	Non-interest expense		269			248			303
	Loss before income taxes and equity in undistributed earnings of subsidiaries		(258	)		(221	)		(261	)
	Income tax (benefit) provision		(156	)		(268	)		(105	)
	(Loss) income before equity in income of subsidiaries		(102	)		47			(156	)
	Equity in undistributed earnings of Belmont Savings Bank		4,308			1,826			1,469
	Equity in undistributed earnings of BSB Funding Corp		85			87			88
	Net income	$	4,291		$	1,960		$	1,401
	Condensed Statements of Cash Flows
		Years Ended December 31,
		2014			2013			2012
	Cash flows from operating activities:
	Net income	$	4,291		$	1,960		$	1,401
	Adjustments to reconcile net income to net cash used in operating activities:
	Equity in undistributed earnings of Belmont Savings Bank		(4,308	)		(1,826	)		(1,469	)
	Equity in undistributed earnings of BSB Funding Corp.		(85	)		(87	)		(88	)
	Deferred income tax expense		363			193			52
	Change in deferred tax valuation allowance		(53	)		(180	)		—
	Other, net		(423	)		(239	)		(122	)
	Net cash used in operating activities		(215	)		(179	)		(226	)
	Cash flows from investing activities:
	Investment in Belmont Savings Bank		(12,000	)		(20,000	)		—
	Net cash used in investing activities		(12,000	)		(20,000	)		—
	Cash flows from financing activities:
	Repurchase of common stock		—			(6,478	)		—
	Proceeds from exercise of stock options, net of cash paid		45			—			—
	Restricted stock awards issued, net of awards surrendered		(43	)		—			—
	Net cash provided by (used in) financing activities		2			(6,478	)		—
	Net decrease in cash and cash equivalents		(12,213	)		(26,657	)		(226	)
	Cash and cash equivalents at beginning of period		14,967			41,624			41,850
	Cash and cash equivalents at end of period	$	2,754		$	14,967		$	41,624

QUARTERLY_DATA_UNAUDITED

QUARTERLY DATA (UNAUDITED)	12 Months Ended
	Dec. 31, 2014
QUARTERLY DATA (UNAUDITED)	NOTE 23 – QUARTERLY DATA (UNAUDITED)
	Quarterly results of operations are as follows:
		Years Ended December 31,
		2014								2013
		Fourth		Third		Second		First		Fourth		Third		Second		First
		Quarter		Quarter		Quarter		Quarter		Quarter		Quarter		Quarter		Quarter
	Interest and dividend income	$	10,600	$	10,036	$	9,268	$	8,751	$	8,875	$	7,995	$	7,136	$	7,005
	Interest expense		2,068		1,896		1,659		1,428		1,316		1,223		1,222		1,226
	Net interest income		8,532		8,140		7,609		7,323		7,559		6,772		5,914		5,779
	Provision for loan losses		565		292		307		388		632		438		100		327
	Net interest income, after provision for loan losses		7,967		7,848		7,302		6,935		6,927		6,334		5,814		5,452
	Non-interest income		920		792		857		722		802		890		908		1,006
	Non-interest expense		6,657		6,656		6,504		6,673		6,797		6,373		6,161		5,800
	Income before taxes		2,230		1,984		1,655		984		932		851		561		658
	Income tax expense		862		782		614		304		287		313		200		242
	Net income	$	1,368	$	1,202	$	1,041	$	680	$	645	$	538	$	361	$	416
	Earnings per common share
	Basic	$	0.16	$	0.14	$	0.12	$	0.08	$	0.07	$	0.06	$	0.04	$	0.05
	Diluted	$	0.16	$	0.14	$	0.12	$	0.08	$	0.07	$	0.06	$	0.04	$	0.05

SUBSEQUENT_EVENTS

SUBSEQUENT EVENTS	12 Months Ended
	Dec. 31, 2014
SUBSEQUENT EVENTS	NOTE 24 – SUBSEQUENT EVENTS
	The Company has evaluated subsequent events for potential recognition and/or disclosure through the date these consolidated financial statements were issued. There were no subsequent events that required adjustment to or disclosure in the consolidated financial statements.

SUMMARY_OF_SIGNIFICANT_ACCOUNT1

SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Policies)	12 Months Ended
	Dec. 31, 2014
Nature of Operations	Nature of Operations
	BSB Bancorp, Inc. (the “Company”) was incorporated in Maryland in June, 2011 to become the holding company of Belmont Savings Bank (the “Bank”), a state-chartered Massachusetts savings bank. The Company is supervised by the Board of Governors of the Federal Reserve System (“FRB”), while the Bank is subject to the regulations of, and periodic examination by, the Federal Deposit Insurance Corporation (“FDIC”) and the Massachusetts Division of Banks (the “Division”). The Bank’s deposits are insured by the Bank Insurance Fund of the FDIC up to $250,000 per account. For balances in excess of the FDIC deposit insurance limits, coverage is provided by the Massachusetts Depositors Insurance Fund, Inc. (“Mass DIF”). In connection with the Company’s conversion from a mutual holding company to stock holding company form of organization (the “conversion”), on October 4, 2011 we completed our initial public offering of common stock, selling 8,993,000 shares of common stock at $10.00 per share for approximately $89.9 million in gross proceeds, including 458,643 shares sold to the Bank’s employee stock ownership plan. In addition, in connection with the conversion, we issued 179,860 shares of our common stock and contributed $200,000 in cash to the Belmont Savings Bank Foundation.
	Belmont Savings Bank is a state chartered savings bank which was incorporated in 1885 and is headquartered in Belmont, Massachusetts. The Bank is engaged principally in the business of attracting deposits from the general public and investing those deposits in residential and commercial real estate loans, consumer loans, including indirect auto loans, commercial loans and construction loans, as well as investment securities.
Basis of Presentation	Basis of Presentation
	The consolidated financial statements include the accounts of the Company and its wholly-owned subsidiaries, Belmont Savings Bank and BSB Funding Corporation. All significant intercompany balances and transactions have been eliminated in consolidation.
	The Company’s consolidated financial statements have been prepared in conformity with U.S. generally accepted accounting principles and general practices within the financial services industry.
Use of Estimates	Use of Estimates
	The preparation of financial statements in conformity with accounting principles generally accepted in the United States of America requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities as of the date of the balance sheet and reported amounts of revenues and expenses during the reporting period. Actual results could differ from those estimates. Material estimates that are particularly susceptible to significant changes in the near-term relate to the determination of the allowance for loan losses, valuation and potential other-than-temporary impairment (“OTTI”) of investment securities, the valuation of deferred tax assets and the fair value of stock-based compensation awards.
Reclassification	Reclassification
	Certain previously reported amounts have been reclassified to conform to the current year’s presentation.
Significant Group Concentrations of Credit Risk	Significant Group Concentrations of Credit Risk
	Most of the Company’s business activity is with customers located within the Commonwealth of Massachusetts. There are no concentrations of credit to borrowers that have similar economic characteristics. The majority of the Company’s loan portfolio is comprised of loans collateralized by real estate located in the Commonwealth of Massachusetts.
Cash and Cash Equivalents	Cash and Cash Equivalents
	For purposes of the consolidated statements of cash flows, cash and cash equivalents include cash, balances due from banks and interest-bearing deposits in other banks.
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 or trading, 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. Gains and losses on the sale of securities are recorded on the trade date and are determined using the specific identification method.
	Each reporting period, the Company evaluates all securities classified as available-for-sale or held-to-maturity, with a decline in fair value below the amortized cost of the investment to determine whether or not the impairment is deemed to be other-than-temporary (“OTTI”). Consideration is given to the obligor of the security, whether the security is guaranteed, whether there is a projected adverse change in cash flows, the liquidity of the security, the type of security, the capital position of security issuers, and payment history of the security, amongst other factors when evaluating these individual securities.
	OTTI is required to be recognized if (1) the Company intends to sell the security; (2) it is “more likely than not” that the Company will be required to sell the security before recovery of its amortized cost basis; or (3) for debt securities, the present value of expected cash flows is not sufficient to recover the entire amortized cost basis. Marketable equity securities are evaluated for OTTI based on the severity and duration of the impairment and, if deemed to be other than temporary, the declines in fair value are reflected in earnings as realized losses. For impaired debt securities that the Company intends to sell, or more likely than not will be required to sell, the full amount of the depreciation is recognized as OTTI through earnings. For all other impaired debt securities, credit-related OTTI is recognized through earnings and non-credit related OTTI is recognized in other comprehensive income, net of applicable taxes.
Federal Home Loan Bank Stock	Federal Home Loan Bank Stock
	As a member of the Federal Home Loan Bank of Boston (FHLB), the Company is required to invest in stock of the FHLB. Management evaluates the Company’s investment in the FHLB of Boston stock for other-than-temporary impairment at least on a quarterly basis and more frequently when economic or market conditions warrant such evaluation. Based on its most recent analysis of the FHLB of Boston as of December 31, 2014, management deems its investment in FHLB of Boston stock to be not other-than-temporarily impaired.
Loans Held For Sale	Loans Held For Sale
	Loans purchased or transferred from held for investment, (if intent or ability to hold existing loans changes), and loans originated and intended for sale in the secondary market are carried at the lower of cost or estimated fair value, in the aggregate. Net unrealized losses, if any, are recognized through a valuation allowance by charges to income. Direct loan origination costs and fees are deferred upon origination and are recognized on the date of sale.
Loans	Loans
	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, any deferred fees or costs on originated loans and unamortized premiums on purchased loans.
	Interest income is accrued on the unpaid principal balance. Loan origination fees, net of certain direct origination costs, are deferred and recognized over the expected term as an adjustment of the related loan yield using the interest method.
	The accrual of interest on all loans is discontinued at the time the loan is 90 days past due unless the credit is well-secured and in process of collection. Past due status is based on contractual terms of the loan. In all cases, loans are placed on nonaccrual if collection of principal or interest is considered doubtful. All interest accrued but not collected for loans that are placed on nonaccrual 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. Loans are returned to accrual status when all the principal and interest amounts contractually due are brought current and future payments are reasonably assured.
	Cash receipts of interest income on impaired loans are credited to principal to the extent necessary to eliminate doubt as to the collectability of the net carrying amount of the loan. Some or all of the cash receipts of interest income on impaired loans is recognized as interest income if the remaining net carrying amount of the loan is deemed to be fully collectible. When recognition of interest income on an impaired loan on a cash basis is appropriate, the amount of income that is recognized is limited to that which would have been accrued on the net carrying amount of the loan at the contractual interest rate. Any cash interest payments received in excess of the limit and not applied to reduce the net carrying amount of the loan are recorded as recoveries of charge-offs until the charge-offs are fully recovered.
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 regular basis by management. This evaluation is inherently subjective as it requires estimates that are susceptible to significant revision as more information becomes available. The allowance consists of general, allocated and unallocated components, as further described below.
	General Component:
	The general component of the allowance for loan losses is based on historical loss experience adjusted for qualitative factors stratified by the following loan segments: residential real estate, home equity lines of credit, commercial real estate, construction, commercial, indirect auto and consumer. Management uses a rolling average of historical losses based on a time frame appropriate to capture relevant loss data for each loan segment. This historical loss factor is adjusted for the following qualitative factors: levels/trends in delinquencies; trends in volume and terms of loans; effects of changes in risk selection and underwriting standards and other changes in lending policies, procedures and practices; experience/ability/depth of lending management and staff; and national and local economic trends and conditions. There were no changes in the Company’s policies or methodology pertaining to the general component of the allowance for loan losses during 2014 or 2013.
	The qualitative factors are determined based on the various risk characteristics of each loan segment. Risk characteristics relevant to each portfolio segment are as follows:
	Residential real estate and home equity loans – The Company generally does not originate loans with a loan-to-value ratio greater than 80 percent and does not grant subprime loans. Loans in this segment are generally collateralized by owner-occupied 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 New England. The underlying cash flows generated by the properties are 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 generally obtains rent rolls annually and continually monitors the cash flows of these borrowers.
	Construction loans – Loans in this segment primarily include speculative real estate development loans for which payment is derived from sale and/or lease up of the property. Credit risk is affected by cost overruns, time to sell at an adequate price, and market conditions.
	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 and business spending, will have an effect on the credit quality in this segment.
	Indirect auto loans – Loans in this segment are secured installment loans that are originated through a network of select regional automobile dealerships. The Company’s interest in the vehicle is secured with a recorded lien on the state title of each automobile. Collections are sensitive to changes in borrower financial circumstances, and the collateral can depreciate or be damaged in the event of repossession. Repayment is dependent on the credit quality and the cash flow of the individual borrower.
	Consumer loans - Loans in this segment include secured and unsecured consumer loans. Repayment is dependent on the credit quality and the cash flow of the individual borrower.
	Allocated Component:
	The allocated component relates to loans that are classified as impaired. A loan is considered impaired when, based on current information and events, it is probable that the Company will be unable to collect the scheduled payments of principal or interest when due according to the contractual terms of the loan agreement. Factors considered by management in determining impairment include payment status, collateral value, and the probability of collecting scheduled principal and interest payments when due. Loans that experience insignificant payment delays and payment shortfalls generally are not classified as impaired. Management determines the significance of payment delays and payment shortfalls on a case-by-case basis, taking into consideration all of the circumstances surrounding the loan and the borrower, including the length of the delay, the reasons for the delay, the borrower’s prior payment record, and the amount of the shortfall in relation to the principal and interest owed.
	The Company periodically may 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 classified as impaired and therefore are subject to a specific review for impairment.
	Impaired loans are measured based on the present value of expected future cash flows discounted at the loan’s effective interest rate at the time of impairment or, as a practical expedient, at the loan’s observable market price or the fair value of the collateral if the loan is collateral-dependent. Generally, impairment on TDRs is measured using the discounted cash flow method by discounting expected cash flows by the loan’s contractual rate of interest in effect prior to the loan’s modification. Loans that have been classified as TDRs and which subsequently default are reviewed to determine if the loan should be deemed collateral dependent. In such an instance, any shortfall between the value of the collateral and the book value of the loan is determined by measuring the recorded investment in the loan against the fair value of the collateral less costs to sell. Generally, all other impaired loans are collateral dependent and impairment is measured through the collateral method. All loans on non-accrual status, with the exception of indirect auto and consumer loans, are considered to be impaired. When the measurement of the impaired loan is less than the recorded investment in the loan, the impairment is recorded through the allowance for loan losses. The Bank charges off the amount of any confirmed loan loss in the period when the loans, or portion of loans, are deemed uncollectible.
	Unallocated Component:
	An unallocated component is maintained to cover uncertainties that could affect management’s estimate of probable losses. The unallocated component of the allowance reflects the margin of imprecision inherent in the underlying assumptions used in the methodologies for estimating allocated and general reserves in the portfolio.
	In the ordinary course of business, the Bank enters into commitments to extend credit, commercial letters of credit and standby letters of credit. Such financial instruments are recorded in the financial statements when they are funded or become payable. The credit risk associated with these commitments is evaluated in a manner similar to the allowance for loan losses. The reserve for off-balance sheet commitments is included in other liabilities in the balance sheet. At December 31, 2014 and 2013, the reserve for unfunded loan commitments was $88,000 and $114,000, respectively. The related provision for off-balance sheet credit losses is included in non-interest expense in the statement of operations.
Premises and Equipment	Premises and Equipment
	Land is carried at cost. Building and equipment are stated at cost, less accumulated depreciation, computed on the straight-line method over the estimated useful lives of the assets. It is general practice to charge the cost of maintenance and repairs to earnings when incurred; major expenditures for betterments are capitalized and depreciated over the shorter of the lease term for leasehold improvements or their estimated useful lives.
Bank-owned Life Insurance	Bank-owned Life Insurance
	Bank-owned life insurance policies are reflected on the consolidated balance sheets at cash surrender value. Changes in the net cash surrender value of the policies, as well as insurance proceeds received, are reflected in non-interest income on the consolidated statements of operations and are generally not subject to income taxes. The Company reviews the financial strength of the insurance carriers prior to the purchase of life insurance policies and no less than annually thereafter. A life insurance policy with any individual carrier is limited to 15% of tier one capital and the total cash surrender value of life insurance policies is limited to 25% of tier one capital.
Transfers and Servicing of Financial Assets	Transfers and Servicing of Financial Assets
	Transfers of an entire financial asset, a group of entire financial assets, or a participating interest in an entire financial asset 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 to pledge or exchange the transferred assets, and (3) the Company does not maintain effective control over the transferred assets.
	During the normal course of business, the Company may transfer whole loans or a portion of a financial asset, such as 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 will 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 has the right to pledge or exchange the entire loan.
	The Company services mortgage loans for others. Mortgage servicing assets are recognized as separate assets when rights are acquired through purchase or through sale of financial assets with servicing rights retained. Fair value is determined using prices for similar assets with similar characteristics, when available, or based upon discounted cash flows using market-based assumptions. Capitalized servicing rights are reported in other assets and are amortized into loan servicing fee income in proportion to, and over the period of, the estimated future net servicing income of the underlying financial assets. Servicing assets are evaluated for impairment based upon the fair value of the rights as compared to amortized cost. Impairment is determined by stratifying rights by predominant risk characteristics, such as interest rates and terms. Impairment is recognized through a valuation allowance for an individual stratum, to the extent that fair value is less than the capitalized amount for the stratum.
Other Real Estate Owned and Other Foreclosed Assets	Other Real Estate Owned and Other Foreclosed Assets
	Assets acquired through, or in lieu of, loan foreclosure are held for sale and are initially recorded at fair value, less estimated costs to sell, at the date of foreclosure or when control is established, establishing a new cost basis. Subsequent to foreclosure, valuations are periodically performed by management and the assets are carried at the lower of carrying amount or fair value less cost to sell. Revenue and expenses from operations, changes in the valuation allowance and any direct writedowns are included in other noninterest expense.
	The Company classifies loans as in-substance repossessed or foreclosed if the Company receives physical possession of the debtor’s assets regardless of whether formal foreclosure proceedings take place.
Advertising Costs	Advertising Costs
	Advertising costs are expensed as incurred.
Supplemental Executive Retirement Plan	Supplemental Executive Retirement Plan
	The compensation cost of an employee’s retirement benefit is recognized on the projected unit credit method over the employee’s approximate service period. The aggregate cost method is utilized for funding purposes.
	The Company accounts for its supplemental executive retirement plan using an actuarial model that allocates benefit costs over the service period of employees in the plan. The Company accounts for the over-funded or under-funded status of the plan as an asset or liability in its consolidated balance sheets and recognizes changes in the funded status in the year in which the changes occur through other comprehensive income or loss.
Employee Stock Ownership Plan	Employee Stock Ownership Plan
	Compensation expense for the Employee Stock Ownership Plan (“ESOP”) is recorded at an amount equal to the shares allocated by the ESOP multiplied by the average fair value of the shares during the period. The Company recognizes compensation expense ratably over the year based upon the Company’s estimate of the number of shares expected to be allocated by the ESOP. Unearned compensation applicable to the ESOP is reflected as a reduction of stockholders’ equity in the consolidated balance sheet. The difference between the average fair value and the cost of the shares allocated by the ESOP is recorded as an adjustment to additional paid-in capital.
Stock Based Compensation	Stock Based Compensation
	The Company recognizes stock-based compensation based on the grant-date fair value of the award adjusted for expected forfeitures. The Company values share-based stock option awards granted using the Black-Scholes option-pricing model. The Company recognizes compensation expense for its awards on a straight-line basis over the requisite service period for the entire award (straight-line attribution method), ensuring that the amount of compensation cost recognized at any date at least equals the portion of the grant-date fair value of the award that is vested at that time.
Income Taxes	Income Taxes
	Deferred income tax assets and liabilities are determined using the liability (or balance sheet) method. Under this method, the net deferred tax asset or liability is determined based on the tax effects of the temporary differences between the book and tax bases of the various balance sheet assets and liabilities and gives current recognition to changes in tax rates and laws. A valuation allowance is established against deferred tax assets when, based upon all available evidence, both positive and negative, it is determined that it is more likely than not that some or all of the deferred tax assets will not be realized.
Fair Value Hierarchy	Fair Value Hierarchy
	The Company measures the fair values of its financial instruments in accordance with accounting guidance that requires an entity to base fair value on exit price, and maximize the use of observable inputs and minimize the use of unobservable inputs to determine the exit price. Under applicable accounting guidance, the Company categorizes its financial instruments, based on the priority of inputs to the valuation technique, into a three-level hierarchy, as described below.
	Level 1 - Level 1 inputs are quoted prices (unadjusted) in active markets for identical assets or liabilities that the reporting entity has the ability to access at the measurement date.
	Level 2 - Level 2 inputs are inputs other than quoted prices included within Level 1 that are observable for the asset or liability, either directly or indirectly.
	Level 3 - Level 3 inputs are unobservable inputs for the asset or liability.
	Transfers between levels are recognized at the end of a reporting period, if applicable.
Earnings per Share (EPS)	Earnings per Share (EPS)
	Basic earnings per share is calculated using the two-class method. The two-class method is an earnings allocation formula under which earnings per share is calculated from common stock and participating securities considering both dividends declared (or accumulated) and participation rights in undistributed earnings as if all such earnings had been distributed during the period. Under this method, all earnings distributed and undistributed, are allocated to participating securities and common shares based on their respective rights to receive dividends. Unvested share-based payment awards that contain nonforfeitable rights to dividends are considered participating securities (i.e. unvested restricted stock), not subject to performance based measures. Basic earnings per share is calculated by dividing net income available to common shareholders by the weighted average number of common shares outstanding (inclusive of participating securities). Diluted earnings per share have been calculated in a manner similar to that of basic earnings per share except that the weighted average number of common shares outstanding is increased to include the number of additional common shares that would have been outstanding if all potentially dilutive common shares (such as those resulting from the exercise of stock options or the attainment of performance measures) were issued during the period, computed using the treasury stock method.
Comprehensive Income	Comprehensive Income
	Accounting principles generally require that recognized revenue, expenses, gains and losses be included in net income. Although certain changes in assets and liabilities are reported as a separate component of the stockholders’ equity section of the balance sheet, such items, along with net income, are components of comprehensive income. Other comprehensive income includes unrealized gains and losses on securities available for sale and changes in the funded status of the Company’s postretirement and supplemental retirement plans.
Recent accounting pronouncements	Recent accounting pronouncements
	In January 2014, the Financial Accounting Standards Board (“FASB”) issued Accounting Standards Update (“ASU”) 2014-01, “Investments - Equity Method and Joint Ventures (Topic 323): Accounting for Investments in Qualified Affordable Housing Projects.” The amendments in this ASU apply to all reporting entities that invest in qualified affordable housing projects through limited liability entities that are flow-through entities for tax purposes as follows:
	1. For reporting entities that meet the conditions for and that elect to use the proportional amortization method to account for investments in qualified affordable housing projects, all amendments in this ASU apply.
	2. For reporting entities that do not meet the conditions for or that do not elect the proportional amortization method, only the amendments in this ASU that are related to disclosures apply.
	The amendments in this ASU permit reporting entities to make an accounting policy election to account for their investments in qualified affordable housing projects using the proportional amortization method if certain conditions are met. Under the proportional amortization method, an entity amortizes the initial cost of the investment in proportion to the tax credits and other tax benefits received and recognizes the net investment performance in the income statement as a component of income tax expense (benefit). For those investments in qualified affordable housing projects not accounted for using the proportional amortization method, the investment should be accounted for as an equity method investment or a cost method investment in accordance with Subtopic 970-323. The amendments in this ASU should be applied retrospectively to all periods presented. A reporting entity that uses the effective yield method to account for its investments in qualified affordable housing projects before the date of adoption may continue to apply the effective yield method for those preexisting investments. The amendments in this ASU are effective for annual periods and interim reporting periods within those annual periods, beginning after December 15, 2014. Early adoption is permitted. The Company does not expect that the adoption of this ASU will have an impact on the Company’s consolidated financial statements.
	In January 2014, the FASB issued ASU 2014-04, “Receivables-Troubled Debt Restructurings by Creditors (Subtopic 310-40): Reclassification of Residential Real Estate Collateralized Consumer Mortgage Loans upon Foreclosure.” The objective of the amendments in this ASU is to reduce diversity by clarifying when an in substance repossession or foreclosure occurs, that is, when a creditor should be considered to have received physical possession of residential real estate property collateralizing a consumer mortgage loan such that the loan receivable should be derecognized and the real estate property recognized. The amendments in this ASU 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 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 amendments in this ASU are effective for annual periods, and interim periods within those annual periods, beginning after December 15, 2014. An entity can elect to adopt the amendments in this ASU using either a modified retrospective transition method or a prospective transition method. The Company does not expect that the adoption of this ASU will have a material impact on the Company’s consolidated financial statements.
	In April 2014, the FASB issued ASU 2014-08, “Presentation of Financial Statements (Topic 205) and Property, Plant, and Equipment (Topic 360): Reporting Discontinued Operations and Disclosures of Disposals of Components of an Entity.” This ASU changes the criteria for reporting discontinued operations and modifies related disclosure requirements. The new guidance is effective on a prospective basis for fiscal years beginning on or after December 15, 2014, and interim periods within those years. The Company anticipates that the adoption of this guidance will not have a material impact on its consolidated financial statements.
	In May 2014, the FASB issued ASU 2014-09, “Revenue from Contracts with Customers (Topic 606).” The objective of this ASU is to clarify principles for recognizing revenue and to develop a common revenue standard for GAAP and International Financial Reporting Standards. The guidance in this ASU affects any entity that either enters into contracts with customers to transfer goods or services or enters into contracts for the transfer of nonfinancial assets unless those contracts are within the scope of other standards. The core principal of the guidance is that an entity should recognize revenue to depict the transfer of promised goods or services to customers in an amount that reflects the consideration to which the entity expects to be entitled in exchange for those goods or services. The amendments in this update are effective for annual reporting periods beginning after December 15, 2016, including interim periods within that reporting period. Early application is not permitted. The Company is currently reviewing this ASU to determine if it will have a material impact on its consolidated financial statements.
	In June 2014, the FASB issued ASU 2014-11, “Transfers and Servicing (Topic 860): Repurchase-to-Maturity Transactions, Repurchase Financings, and Disclosures.” The amendments in this ASU require two accounting changes. First, the amendments in this ASU change the accounting for repurchase-to-maturity transactions to secured borrowing accounting. Second, for repurchase financing arrangements, the amendments require separate accounting for a transfer of a financial asset executed contemporaneously with a repurchase agreement with the same counterparty, which will result in secured borrowing accounting for the repurchase agreement. This ASU also includes new disclosure requirements. The accounting changes in this Update are effective for the first interim or annual period beginning after December 15, 2014. An entity is required to present changes in accounting for transactions outstanding on the effective date as a cumulative-effect adjustment to retained earnings as of the beginning of the period of adoption. Earlier application is prohibited. The Company anticipates that the adoption of this guidance will not have a material impact on its consolidated financial statements.
	In June 2014, the FASB issued ASU 2014-12, “Compensation - Stock Compensation (Topic 718): Accounting for Share-Based Payments When the Terms of an Award Provide That a Performance Target Could be Achieved after the Requisite Service Period.” The amendments in this ASU require that a performance target that affects vesting and that could be achieved after the requisite service period be treated as a performance condition. A reporting entity should apply existing guidance in Topic 718 as it relates to awards with performance conditions that affect vesting to account for such awards. This ASU is effective for annual periods, and interim periods within those annual periods, beginning after December 15, 2015. Earlier adoption is permitted. ASU 2014-12 may be adopted either (a) prospectively to all awards granted or modified after the effective date or (b) retrospectively to all awards with performance targets that are outstanding as of the beginning of the earliest annual period presented in the financial statements, and to all new or modified awards thereafter. If retrospective transition is adopted, the cumulative effect of applying this update as of the beginning of the earliest annual period presented in the financial statements should be recognized as an adjustment to the opening retained earnings balance at that date. The Company anticipates that the adoption of this guidance will not have a material impact on its consolidated financial statements.
	In August 2014, the FASB issued ASU 2014-13, “Consolidation (Topic 810): Measuring the Financial Assets and the Financial Liabilities of a Consolidated Collateralized Financing Entity.” This ASU applies to entities that meet the following criteria:
		1	they are required to consolidate a collateralized entity under the Variable Interest Entities guidance;
		2	they measure all of the financial assets and the financial liabilities of that consolidated collateralized financing entity at fair value in the consolidated financial statements based on other FASB rules; and
		3	those changes in fair value are reflected in earnings.
	Under ASU 2014-13, entities that meet these criteria are provided an alternative under which they can choose to eliminate the difference between the fair value of financial assets and financial liabilities of a consolidated collateralized financing entity. If that alternative is not elected, then ASU 2014-13 indicates that the fair value of the financial assets and the fair value of the financial liabilities of the consolidated collateralized financing entity should be measured in accordance with ASC 820. Fair Value Measurement and differences between the fair value of the financial assets and the financial liabilities of that consolidated collateralized financing entity should be reflected in earnings and attributed to the reporting entity in the consolidated statement of income or loss. The amendments in this ASU are effective for annual periods, and interim periods within those annual periods, beginning after December 15, 2015. The Company anticipates that the adoption of this ASU will not have an impact on its consolidated financial statements.
	In August 2014, the FASB issued ASU 2014-14, “Receivables - Troubled Debt Restructurings by Creditors (Subtopic 310-40): Classification of Certain Government - Guaranteed Mortgage Loans upon Foreclosure.” The amendments in this ASU require that a mortgage loan be derecognized and that a separate other receivable be recognized upon foreclosure if the following conditions are met:
		1	the loan has a government guarantee that is not separable from the loan before foreclosure;
		2	at the time of foreclosure, the creditor has the intent to convey the real estate property to the guarantor and make a claim on the guarantee, and the creditor has the ability to recover under that claim; and
		3	at the time of foreclosure, any amount of the claim that is determined on the basis of the fair value of the real estate is fixed.
	Upon foreclosure, the separate other receivable should be measured based on the amount of the loan balance (principal and interest) expected to be recovered from the guarantor. The amendments in this ASU are effective for annual periods, and interim periods within those annual periods, beginning after December 15, 2014. The Company anticipates that the adoption of this ASU will not have a material impact on its consolidated financial statements.
	In August 2014, the FASB issued ASU 2014-15, “Presentation of Financial Statements – Going Concern (Subtopic 205-40).” The amendments in this ASU provide guidance about management’s responsibility to evaluate whether there is substantial doubt about an entity’s ability to continue as a going concern and to provide related footnote disclosures. The amendments require management to assess an entity’s ability to continue as a going concern by incorporating and expanding upon certain principles that are currently in U.S. auditing standards. Specifically, the amendments (1) provide a definition of the term substantial doubt, (2) require an evaluation every reporting period including interim periods, (3) provide principles for considering the mitigating effect of management’s plans, (4) require certain disclosures when substantial doubt is alleviated as a result of consideration of management’s plans, (5) require an express statement and other disclosures when substantial doubt is not alleviated, and (6) require an assessment for a period of one year after the date that the financial statements are issued (or available to be issued). The amendments in this ASU are effective for the annual period ending after December 15, 2016, and for annual periods and interim periods thereafter. Early application is permitted. The adoption of this guidance is not expected to have an impact on the Company’s consolidated financial statements.
	In November 2014, the FASB issued ASU 2014-16, “Derivatives and Hedging (Topic 815).” The objective of this ASU is to eliminate the use of different methods in practice and thereby reduce existing diversity under GAAP in the accounting for hybrid financial instruments issued in the form of a share. The amendments in this ASU apply to all entities that are issuers of, or investors in, hybrid financial instruments that are issued in the form of a share. The amendments in this ASU do not change the current criteria in GAAP for determining when separation of certain embedded derivative features in a hybrid financial instrument is required. The amendments clarify how current GAAP should be interpreted in evaluating the economic characteristics and risks of a host contract in a hybrid financial instrument that is issued in the form of a share. Specifically, the amendments clarify that an entity should consider all relevant terms and features, including the embedded derivative feature being evaluated for bifurcation, in evaluating the nature of the host contract. Furthermore, the amendments clarify that no single term or feature would necessarily determine the economic characteristics and risks of the host contract. Rather, the nature of the host contract depends upon the economic characteristics and risks of the entire hybrid financial instrument. In addition, the amendments in this ASU clarify that, in evaluating the nature of a host contract, an entity should assess the substance of the relevant terms and features when considering how to weight those terms and features. Specifically, the assessment of the substance of the relevant terms and features should incorporate a consideration of (1) the characteristics of the terms and features themselves, (2) the circumstances under which the hybrid financial instrument was issued or acquired, and (3) the potential outcomes of the hybrid financial instrument, as well as the likelihood of those potential outcomes. The amendments in this ASU are effective for fiscal years, and interim periods within those fiscal years, beginning after December 15, 2015. Early adoption is permitted. The adoption of this guidance is not expected to have an impact on the Company’s consolidated financial statements.
	In November 2014, the FASB issued ASU 2014-17, “Business Combinations (Topic 805): Pushdown Accounting.” The amendments in this ASU provide guidance on whether and at what threshold an acquired entity that is a business or nonprofit activity may elect to apply pushdown accounting in its separate financial statements upon a change-in-control event in which an acquirer obtains control of the acquired entity. The amendments in this ASU are effective on November 18, 2014. After the effective date, an acquired entity can make an election to apply the guidance to future change-in-control events or to its most recent change-in-control event. However, if the financial statements for the period in which the most recent change-in-control event occurred already have been issued or made available to be issued, the application of this guidance would be a change in accounting principle. The adoption of this guidance did not have an impact on the Company’s consolidated financial statements.
	In January 2015, the FASB issued ASU 2015-01, “Income Statement – Extraordinary and Unusual Items (Subtopic 225-20).” The amendments in this ASU eliminate the concept of extraordinary items. Eliminating the concept of extraordinary items will save time and reduce costs for preparers because they will not have to assess whether a particular event or transaction event is extraordinary (even if they ultimately would conclude it is not). This also alleviates uncertainty for preparers, auditors, and regulators because auditors and regulators no longer will need to evaluate whether a preparer treated an unusual and/or infrequent item appropriately. The presentation and disclosure guidance for items that are unusual in nature or occur infrequently will be retained and will be expanded to include items that are both unusual in nature and infrequently occurring. The amendments in this ASU are effective for fiscal years, and interim periods within those fiscal years, beginning after December 15, 2015. A reporting entity may apply the amendments prospectively. A reporting entity also may apply the amendments retrospectively to all prior periods presented in the financial statements. Early adoption is permitted provided that the guidance is applied from the beginning of the fiscal year of adoption. The adoption of this guidance is not expected to have an impact on the Company’s consolidated financial statements.

SECURITIES_Tables

SECURITIES (Tables)	12 Months Ended
	Dec. 31, 2014
Amortized Cost and Fair Values of Held-to-Maturity Securities	The following table presents a summary of the amortized cost, gross unrealized holding gains and losses and fair value of securities available for sale and securities held to maturity for the periods indicated. Gross unrealized holding gains and losses on available for sale securities are included in accumulated other comprehensive loss.
				December 31, 2014											December 31, 2013
		Amortized		Gross			Gross			Fair			Amortized		Gross		Gross			Fair
		Cost		Unrealized			Unrealized			Value			Cost		Unrealized		Unrealized			Value
		Basis		Gains			Losses						Basis		Gains		Losses
	Available for sale securities:
	Corporate debt securities	$	22,199	$	86		$	(206	)	$	22,079		$	22,271	$	75	$	(425	)	$	21,921
		$	22,199	$	86		$	(206	)	$	22,079		$	22,271	$	75	$	(425	)	$	21,921
	Held to maturity securities:
	U.S. government sponsored mortgage-backed securities	$	100,977	$	1,019		$	(227	)	$	101,769		$	99,257	$	572	$	(998	)	$	98,831
	Corporate debt securities		17,551		164			(37	)		17,678			20,519		120		(489	)		20,150
		$	118,528	$	1,183		$	(264	)	$	119,447		$	119,776	$	692	$	(1,487	)	$	118,981
Amortized Cost and Estimated Fair Value of Debt Securities by Contractual Maturity	The amortized cost and estimated fair value of debt securities by contractual maturity at December 31, 2014 is as follows. Expected maturities will differ from contractual maturities because issuers may have the right to call or prepay obligations with or without call or prepayment penalties.
		Available for Sale					Held-to-Maturity
		Amortized		Fair			Amortized			Fair
		Cost Basis		Value			Cost Basis			Value
	Due in one year or less	$	—	$	—		$	—		$	—
	Due from one year to five years		12,807		12,893			7,277			7,355
	Due from five years to ten years		9,392		9,186			65,912			66,256
	Due after ten years		—		—			45,339			45,836
Sales of Securities Available for Sale	Information relating to sales of securities available-for-sale during the years ending December 31, 2014, 2013 and 2012 were as follows:
		2014		2013			2012
	Proceeds from sales	$	—	$	17,985		$	—
	Gross realized gains		—		64			—
	Gross realized losses		—		(30	)		—
	Tax expense of securities gains/losses		—		14			—
Securities with Gross Unrealized Losses Aggregated by Investment Category and Length of Time	Information pertaining to securities with gross unrealized losses at December 31, 2014 and 2013, aggregated by investment category and length of time that individual securities have been in a continuous loss position, follows:
		Less than 12 Months					Over 12 Months
		Fair		Unrealized			Fair			Unrealized
		Value		Losses			Value			Losses
	December 31, 2014:
	Available-for-sale
	Corporate debt securities	$	—	$	—		$	4,185		$	(206	)
	Held-to-maturity
	Corporate debt securities		4,691		(37	)		—			—
	U.S. government sponsored mortgage-backed securities		10,974		(34	)		15,637			(193	)
	Total temporarily impaired securities	$	15,665	$	(71	)	$	19,822		$	(399	)
	December 31, 2013:
	Available-for-sale
	Corporate debt securities	$	4,970	$	(30	)	$	4,052		$	(395	)
	Held-to-maturity
	Corporate debt securities		10,010		(489	)		—			—
	U.S. government sponsored mortgage-backed securities		59,073		(998	)		6			—
	Total temporarily impaired securities	$	74,053	$	(1,517	)	$	4,058		$	(395	)

LOANS_Tables

LOANS (Tables)	12 Months Ended
	Dec. 31, 2014
Summary of Loans	A summary of the balances of loans follows:
			December 31,
			2014			2013
	Mortgage loans on real estate:
	Residential one-to-four family		$	450,572		$	287,652
	Commercial real estate loans			395,178			320,807
	Home equity loans			131,628			92,461
	Construction loans			31,389			9,965
	Total real estate loans			1,008,767			710,885
	Other loans:
	Commercial loans			39,161			30,691
	Indirect auto loans			131,961			99,798
	Consumer loans			774			558
				171,896			131,047
	Total loans			1,180,663			841,932
	Net deferred loan costs			5,068			3,535
	Net unamortized mortgage premiums			2,549			1,504
	Allowance for loan losses			(8,881	)		(7,958	)
	Total loans, net		$	1,179,399		$	839,013
Activity in Allowance for Loan Losses by Portfolio Class and Balances of Allowance for Loan Losses and Recorded Investment in Loans by Portfolio Class	The following tables present the activity in the allowance for loan losses for the years ended December 31, 2014, 2013 and 2012 and the balances of the allowance for loan losses and recorded investment in loans by portfolio class based on impairment method at December 31, 2014 and 2013. The recorded investment in loans in any of the following tables does not include accrued and unpaid interest or any deferred loan fees or costs, as amounts are not significant.
			Year Ended December 31, 2014
			Beginning			Provision			Charge-offs			Recoveries		Ending Balance
			balance
	Residential one-to-four family		$	2,189		$	550		$	(375	)	$	—	$	2,364
	Commercial real estate			3,621			422			—			—		4,043
	Construction			134			94			—			—		228
	Commercial			419			43			(4	)		—		458
	Home equity			681			346			(199	)		—		828
	Indirect auto			749			65			(51	)		15		778
	Consumer			26			—			(29	)		14		11
	Unallocated			139			32			—			—		171
	Total		$	7,958		$	1,552		$	(658	)	$	29	$	8,881
			Year Ended December 31, 2013
			Beginning			Provision			Charge-offs			Recoveries		Ending Balance
			balance			(benefit)
	Residential one-to-four family		$	1,412		$	709		$	—		$	68	$	2,189
	Commercial real estate			3,039			582			—			—		3,621
	Construction			198			(64	)		—			—		134
	Commercial			470			(51	)		—			—		419
	Home equity			466			235			(20	)		—		681
	Indirect auto			772			(30	)		(62	)		69		749
	Consumer			19			42			(53	)		18		26
	Unallocated			64			75			—			—		139
	Total		$	6,440		$	1,498		$	(135	)	$	155	$	7,958
			Year Ended December 31, 2012
			Beginning			Provision			Charge-offs			Recoveries		Ending Balance
			balance
	Residential one-to-four family		$	986		$	608		$	(225	)	$	43	$	1,412
	Commercial real estate			1,969			1,070			—			—		3,039
	Construction			188			10			—			—		198
	Commercial			321			149			—			—		470
	Home equity			632			453			(715	)		96		466
	Indirect auto			664			343			(281	)		46		772
	Consumer			16			39			(48	)		12		19
	Unallocated			—			64			—			—		64
	Total		$	4,776		$	2,736		$	(1,269	)	$	197	$	6,440
			Year Ended December 31, 2014
			Individually evaluated for impairment						Collectively evaluated for impairment					Total
			Loan balance			Allowance			Loan balance			Allowance		Loan Balance		Allowance
	Residential one-to-four family		$	6,256		$	188		$	444,316		$	2,176	$	450,572	$	2,364
	Commercial real estate			3,882			5			391,296			4,038		395,178		4,043
	Construction			—			—			31,389			228		31,389		228
	Commercial			—			—			39,161			458		39,161		458
	Home equity			296			—			131,332			828		131,628		828
	Indirect auto			12			—			131,949			778		131,961		778
	Consumer			—			—			774			11		774		11
	Unallocated			—			—			—			171		—		171
	Total		$	10,446		$	193		$	1,170,217		$	8,688	$	1,180,663	$	8,881
			Year Ended December 31, 2013
			Individually evaluated for impairment						Collectively evaluated for impairment					Total
			Loan balance			Allowance			Loan balance			Allowance		Loan Balance		Allowance
	Residential one-to-four family		$	6,982		$	869		$	280,670		$	1,320	$	287,652	$	2,189
	Commercial real estate			4,081			11			316,726			3,610		320,807		3,621
	Construction			—			—			9,965			134		9,965		134
	Commercial			—			—			30,691			419		30,691		419
	Home equity			400			—			92,061			681		92,461		681
	Indirect auto			16			—			99,782			749		99,798		749
	Consumer			1			—			557			26		558		26
	Unallocated			—			—			—			139		—		139
	Total		$	11,480		$	880		$	830,452		$	7,078	$	841,932	$	7,958
Information about Loans that Meet Definition of Impaired Loan	Information about loans that meet the definition of an impaired loan in ASC 310-10-35 is as follows as of December 31, 2014 and 2013:
			Impaired loans with a related allowance for credit losses at December 31, 2014
			Recorded			Unpaid			Related
			Investment			Principal			Allowance For
						Balance			Credit Losses
	Residential one-to-four family		$	1,186		$	1,186		$	188
	Commercial real estate			3,060			3,060			5
	Construction			—			—			—
	Commercial			—			—			—
	Home equity			—			—			—
	Indirect auto			—			—			—
	Consumer			—			—			—
	Totals		$	4,246		$	4,246		$	193
			Impaired loans with no related allowance for credit losses at December 31, 2014
			Recorded			Unpaid			Related
			Investment			Principal			Allowance For
						Balance			Credit Losses
	Residential one-to-four family		$	5,070		$	5,229		$	—
	Commercial real estate			822			822			—
	Construction			—			—			—
	Commercial			—			—			—
	Home equity			296			298			—
	Indirect auto			12			12			—
	Consumer			—			—			—
	Totals		$	6,200		$	6,361		$	—
			Impaired loans with a related allowance for credit losses at December 31, 2013
			Recorded			Unpaid			Related
			Investment			Principal			Allowance For
						Balance			Credit Losses
	Residential one-to-four family		$	3,824		$	3,824		$	869
	Commercial real estate			3,111			3,111			11
	Construction			—			—			—
	Commercial			—			—			—
	Home equity			—			—			—
	Indirect auto			—			—			—
	Consumer			—			—			—
	Totals		$	6,935		$	6,935		$	880
			Impaired loans with no related allowance for credit losses at December 31, 2013
			Recorded			Unpaid			Related
			Investment			Principal			Allowance For
						Balance			Credit Losses
	Residential one-to-four family		$	3,158		$	3,158		$	—
	Commercial real estate			970			970			—
	Construction			—			—			—
	Commercial			—			—			—
	Home equity			400			599			—
	Indirect auto			16			16			—
	Consumer			1			1			—
	Totals		$	4,545		$	4,744		$	—
Information regarding Interest Income Recognized on Impaired Loans	The following tables set forth information regarding interest income recognized on impaired loans, by portfolio, for the periods indicated.
			Year Ended December 31, 2014						Year Ended December 31, 2013					Year Ended December 31, 2012
	With an allowance recorded		Average			Interest			Average			Interest		Average		Interest
			Recorded			Income			Recorded			Income		Recorded		Income
			Investment			Recognized			Investment			Recognized		Investment		Recognized
	Residential one-to-four family		$	1,592		$	107		$	2,566		$	10	$	1,325	$	11
	Commercial real estate			3,085			115			1,824			59		—		—
	Construction			—			—			—			—		—		—
	Commercial			—			—			—			—		—		—
	Home equity			—			—			—			—		432		3
	Indirect auto			—			—			—			—		—		—
	Consumer			—			—			—			—		—		—
	Totals		$	4,677		$	222		$	4,390		$	69	$	1,757	$	14
			Year Ended December 31, 2014						Year Ended December 31, 2013					Year Ended December 31, 2012
	Without an allowance recorded		Average			Interest			Average			Interest		Average		Interest
			Recorded			Income			Recorded			Income		Recorded		Income
			Investment			Recognized			Investment			Recognized		Investment		Recognized
	Residential one-to-four family		$	3,689		$	83		$	5,460		$	130	$	3,006	$	76
	Commercial real estate			887			34			2,258			118		889		32
	Construction			—			—			—			—		—		—
	Commercial			—			—			—			—		35		4
	Home equity			398			8			462			17		410		13
	Indirect auto			2			—			3			—		—		—
	Consumer			—			—			—			—		—		—
	Totals		$	4,976		$	125		$	8,183		$	265	$	4,340	$	125
Summary of Past Due and Non-Accrual Loans	The following is a summary of past due and non-accrual loans at December 31, 2014 and 2013:
			December 31, 2014
			30–59 Days			60–89 Days			90 Days			Total		90 days		Loans on
									or More			Past Due		or more		Non-accrual
														and accruing
	Real estate loans:
	Residential one-to-four family		$	—		$	230		$	2,432		$	2,662	$	—	$	2,662
	Commercial real estate			—			—			—			—		—		—
	Home equity			270			—			96			366		—		96
	Construction			—			—			—			—		—		—
	Other loans:
	Commercial			—			—			—			—		—		—
	Indirect auto			463			45			12			520		—		12
	Consumer			—			—			—			—		—		—
			$	733		$	275		$	2,540		$	3,548	$	—	$	2,770
			December 31, 2013
			30–59 Days			60–89 Days			90 Days			Total		90 days or		Loans on
									or More			Past Due		more		Non-accrual
														and accruing
	Real estate loans:
	Residential one-to-four family		$	410		$	—		$	1,911		$	2,321	$	—	$	3,860
	Commercial real estate			—			—			38			38		—		38
	Home equity			914			—			—			914		—		200
	Construction			—			—			—			—		—		—
	Other loans:
	Commercial			—			—			—			—		—		—
	Indirect auto			222			—			16			238		—		16
	Consumer			—			—			1			1		—		1
			$	1,546		$	—		$	1,966		$	3,512	$	—	$	4,115
Company's Loans by Risk Rating	The following table presents the Company’s loans by risk rating at December 31, 2014 and 2013. There were no loans rated as 6 (“doubtful”) or 7 (“loss”) at the dates indicated.
			December 31, 2014
			Loans rated 1-3			Loans rated 4			Loans rated 5			Loans not rated (A)		Total
	Residential one-to-four family		$	—		$	1,134		$	3,400		$	446,038	$	450,572
	Commercial real estate			386,513			—			8,665			—		395,178
	Construction			31,389			—			—			—		31,389
	Commercial			39,159			2			—			—		39,161
	Home equity			—			—			895			130,733		131,628
	Indirect auto			—			—			—			131,961		131,961
	Consumer			—			—			—			774		774
	Total		$	457,061		$	1,136		$	12,960		$	709,506	$	1,180,663
			31-Dec-13
			Loans rated 1-3			Loans rated 4			Loans rated 5			Loans not rated (A)		Total
	Residential one-to-four family		$	—		$	3,123		$	4,613		$	279,916	$	287,652
	Commercial real estate			307,093			4,277			9,437			—		320,807
	Construction			9,965			—			—			—		9,965
	Commercial			30,643			48			—			—		30,691
	Home equity			—			200			999			91,262		92,461
	Indirect auto			—			—			—			99,798		99,798
	Consumer			—			9			4			545		558
	Total		$	347,701		$	7,657		$	15,053		$	471,521	$	841,932
	(A)	Residential real estate, home equity, indirect auto and consumer loans are not formally risk rated by the Company unless the loans become delinquent.
Trouble Debt Restructuring Accrual Status	The following table shows the Company’s total TDRs and other pertinent information as of the dates indicated (in thousands):
			December 31, 2014			December 31, 2013
	TDRs on Accrual Status		$	7,675		$	7,366
	TDRs on Nonaccrual Status			1,551			1,900
	Total TDRs		$	9,226		$	9,266
	Amount of specific allocation included in the allowance for loan losses associated with TDRs		$	174		$	543
	Additional commitments to lend to a borrower who has been a party to a TDR		$	—		$	—
Troubled Debt Restructurings on Financing Receivables	The following table shows the TDR modifications which occurred during the periods indicated and the outstanding recorded investment subsequent to the modifications occurring:
			Year ended
			December 31, 2014
			# of			Pre-modification			Post-modification
			Contracts			outstanding			outstanding
						recorded investment			recorded investment (a)
	Real estate loans:
	Residential one-to-four family			2		$	2,224		$	2,261
	Home equity lines of credit			1			200			200
	Commercial real estate			1			882			882
				4		$	3,306		$	3,343
			Year ended
			31-Dec-13
			# of			Pre-modification			Post-modification
			Contracts			outstanding			outstanding
						recorded investment			recorded investment (a)
	Real estate loans:
	Residential one-to-four family			1		$	347		$	378
	Commercial real estate			4			4,732			4,128
				5		$	5,079		$	4,506
	(a)	The post-modification balances represent the balance of the loan on the date of modifications. These amounts may show an increase when modifications include a capitalization of interest or taxes.
Post Modification of Troubled Debt Restructuring Balance	The following table shows the Company’s post-modification balance of TDRs listed by type of modification during the years indicated:
			For the years ended
			December 31, 2014			December 31, 2013
	Extended maturity		$	882		$	1,370
	Adjusted interest rate			561			3,136
	Interest only period			1,900			—
	Total		$	3,343		$	4,506

TRANSFERS_AND_SERVICING_Tables

TRANSFERS AND SERVICING (Tables)	12 Months Ended
	Dec. 31, 2014
Changes in Mortgage Servicing Rights	Changes in mortgage servicing rights, which are included in other assets, were as follows:
		Years Ended December 31,
		2014			2013			2012
	Balance at beginning of period	$	411		$	353		$	—
	Capitalization		128			202			421
	Amortization		(75	)		(101	)		(32	)
	Valuation allowance adjustment		12			(43	)		(36	)
	Balance at end of period	$	476		$	411		$	353

PREMISES_AND_EQUIPMENT_Tables

PREMISES AND EQUIPMENT (Tables)	12 Months Ended
	Dec. 31, 2014
Summary of Cost and Accumulated Depreciation of Premises and Equipment	A summary of the cost and accumulated depreciation of premises and equipment follows:
		December 31,
		2014			2013
	Land	$	161		$	161
	Buildings		3,505			3,331
	Leasehold improvements		2,165			2,152
	Furniture and equipment		6,040			5,925
			11,871			11,569
	Accumulated depreciation		(8,805	)		(8,242	)
		$	3,066		$	3,327

DEPOSITS_Tables

DEPOSITS (Tables)	12 Months Ended
	Dec. 31, 2014
Scheduled Maturities of Time Deposits	At December 31, 2014, the scheduled maturities of time deposits are as follows:
	2015	$	62,028
	2016		25,969
	2017		26,375
	2018		68,030
	2019		43,811
		$	226,213

LONGTERM_BORROWINGS_Tables

LONG-TERM BORROWINGS (Tables) (Federal Home Loan Bank Advances)	12 Months Ended
	Dec. 31, 2014
Federal Home Loan Bank Advances
Schedule of Maturities of Long-Term Debt	Long-term debt at December 31, 2014 and 2013 consists of the following FHLB advances:
		Amount				Weighted Average Rate
		2014		2013		2014			2013
	Fixed rate advances maturing:
	2014		—	$	9,000		—	%		1.26	%
	2015	$	14,100		14,100		1.17	%		1.17	%
	2016		7,000		7,000		1.39	%		1.39	%
	2017		35,000		15,000		1.14	%		0.9	%
	2018		27,000		17,000		1.88	%		1.93	%
	2019		20,000		—		1.89	%		—	%
		$	103,100	$	62,100		1.5	%		1.35	%

INCOME_TAXES_Tables

INCOME TAXES (Tables)	12 Months Ended
	Dec. 31, 2014
Allocation of Federal and State Income Taxes between Current and Deferred Portions	Allocation of federal and state income taxes between current and deferred portions is as follows:
		Years Ended December 31,
		2014			2013			2012
	Current tax provision:
	Federal	$	2,517		$	1,615		$	401
	State		653			388			59
			3,170			2,003			460
	Deferred tax (benefit) provision:
	Federal		(419	)		(606	)		195
	State		(136	)		(175	)		58
			(555	)		(781	)		253
	Change in valuation allowance		(53	)		(180	)		—
	Total provision for income taxes	$	2,562		$	1,042		$	713
Summary of Reasons for Differences between Statutory Income Tax Rate and Effective Tax Rate	The reasons for the differences between the statutory federal income tax rate and the effective tax rates are summarized as follows:
		Years Ended December 31,
		2014			2013			2012
	Statutory federal tax rate		34	%		34	%		34	%
	Increase (decrease) resulting from:
	State taxes, net of federal tax benefit		5			4.8			3.7
	Bank-owned life insurance		(3.9	)		(4.1	)		(5.8	)
	Change in valuation allowance		(0.8	)		(6.0	)		—
	Share based compensation		2.9			5.6			1.3
	Other, net		0.2			0.4			0.5
	Effective tax rates		37.4	%		34.7	%		33.7	%
Components of Net Deferred Tax Assets	The components of the net deferred tax asset are as follows:
		Years Ended December 31,
		2014			2013
	Deferred tax assets:
	Employee benefit and deferred compensation plans	$	3,035		$	2,766
	Allowance for loan losses		3,582			3,224
	Depreciation		90			—
	Accrued rent		11			11
	Interest on non-performing loans		8			8
	Stock options		272			144
	Charitable contribution carryover		190			502
	Unrealized loss on securities available for sale		48			140
	ESOP		74			53
	Gross deferred tax assets		7,310			6,848
	Valuation allowance		—			(53	)
			7,310			6,795
	Deferred tax liabilities:
	Mortgage servicing rights		(190	)		(164	)
	Deferred loan origination costs		(934	)		(624	)
	Restricted stock awards		(483	)		(651	)
	Depreciation		—			(110	)
	Unrecognized retirement benefit		(34	)		(14	)
	Other		(27	)		(86	)
			(1,668	)		(1,649	)
	Net deferred tax asset	$	5,642		$	5,146
Schedule of Valuation Reserve	A valuation reserve had been established for the income tax effects attributable to the deferred tax assets to limit the federal and state tax benefit related to the charitable contribution carryover.
		Years Ended December 31,
		2014			2013			2012
	Balance at beginning of year	$	(53	)	$	(233	)	$	(233	)
	Reserve for charitable contribution carryforward		—			—			—
	Reduction in valuation allowance		53			180			—
		$	—		$	(53	)	$	(233	)

OFFBALANCE_SHEET_ACTIVITIES_Ta

OFF-BALANCE SHEET ACTIVITIES (Tables)	12 Months Ended
	Dec. 31, 2014
Financial Instruments Outstanding whose Contract Amounts Represent Credit Risk	At December 31, 2014 and 2013, the following financial instruments were outstanding whose contract amounts represent credit risk:
		Contract Amount
		2014		2013
	Commitments to grant loans	$	21,594	$	27,588
	Unfunded commitments under lines of credit		183,512		132,825
	Unadvanced portion of construction loans		13,466		14,066
	Standby letters of credit		177		80
	Commitments to purchase loans		32,883		15,383

COMMITMENTS_AND_CONTINGENT_LIA1

COMMITMENTS AND CONTINGENT LIABILITIES (Tables)	12 Months Ended
	Dec. 31, 2014
Future Minimum Rent Commitments under Operating Leases	Pursuant to the terms of noncancelable lease agreements in effect at December 31, 2014, pertaining to banking premises and equipment, future minimum rent commitments under various operating leases are as follows:
	2015	$	427
	2016		413
	2017		322
	2018		276
	2019		281
	Thereafter		503
		$	2,222

MINIMUM_REGULATORY_CAPITAL_REQ1

MINIMUM REGULATORY CAPITAL REQUIREMENTS (Tables)	12 Months Ended
	Dec. 31, 2014
Actual Capital Amounts and Ratio
		Actual					Minimum For Capital					Minimum To Be Well
							Adequacy Purposes					Capitalized Under
												Prompt Corrective
												Action Provisions
		Amount		Ratio			Amount		Ratio			Amount		Ratio
	As of December 31, 2014:
	Total Capital (to Risk Weighted Assets)
	Consolidated	$	145,653		12.99	%	$	89,718		8	%		N/A		N/A
	Belmont Savings Bank		137,139		12.23	%		89,673		8	%	$	112,092		10	%
	Tier 1 Capital (to Risk Weighted Assets)
	Consolidated	$	136,684		12.19	%	$	44,859		4	%		N/A		N/A
	Belmont Savings Bank		128,170		11.43	%		44,837		4	%	$	67,255		6	%
	Tier 1 Capital (to Average Assets)
	Consolidated	$	136,684		10.05	%	$	54,417		4	%		N/A		N/A
	Belmont Savings Bank		128,170		9.42	%		54,403		4	%	$	68,003		5	%
	As of December 31, 2013:
	Total Capital (to Risk Weighted Assets)
	Consolidated	$	138,146		16.3	%	$	67,806		8	%		N/A		N/A
	Belmont Savings Bank		117,849		13.91	%		67,782		8	%	$	84,728		10	%
	Tier 1 Capital (to Risk Weighted Assets)
	Consolidated	$	130,074		15.35	%	$	33,903		4	%		N/A		N/A
	Belmont Savings Bank		109,777		12.96	%		33,891		4	%	$	50,837		6	%
	Tier 1 Capital (to Average Assets)
	Consolidated	$	130,074		12.59	%	$	41,323		4	%		N/A		N/A
	Belmont Savings Bank		109,777		10.62	%		41,334		4	%	$	51,668		5	%

EMPLOYEE_BENEFIT_PLANS_Tables

EMPLOYEE BENEFIT PLANS (Tables)	12 Months Ended
	Dec. 31, 2014
Information Pertaining to Activity in Plan	Information pertaining to the activity in the plan is as follows:
		Years Ended December 31,
		2014			2013
	Change in benefit obligation:
	Benefit obligation at beginning of year	$	729		$	538
	Service cost		258			242
	Interest cost		40			21
	Establish prior service cost base		63			—
	Actuarial gain		(105	)		(72	)
	Benefit obligation at end of year		985			729
	Funded status at end of year	$	(985	)	$	(729	)
	Accrued pension benefit		(1,069	)		(765	)
	Accumulated benefit obligation	$	857		$	670
Components of Net Periodic Pension Cost	The components of net periodic pension cost are as follows:
		December 31,
		2014			2013
	Service cost	$	258		$	242
	Interest cost		40			21
	Amortization of prior service cost		6			—
	Net periodic cost	$	304		$	263
Other Changes in Benefit Obligations Recognized in Other Comprehensive Income	Other changes in benefit obligations recognized in other comprehensive income are as follows:
		December 31,
		2014			2013
	Establish prior service cost base	$	63		$	—
	Amortization of prior service cost		(6	)		—
	Net actuarial gain		(105	)		(72	)
	Total recognized in other comprehensive income	$	(48	)	$	(72	)
Amounts Recognized in Accumulated Other Comprehensive Loss, before Tax Effect	Amounts recognized in accumulated other comprehensive loss, before tax effect, consist of the following:
		December 31,
		2014			2013
	Unrecognized prior service cost	$	57		$	—
	Unrecognized net gain		(141	)		(36	)
		$	(84	)	$	(36	)
Estimated Future Benefit Payments	Estimated future benefit payments, which reflect expected future service, as appropriate, are as follows:
	Year Ending	Amount
	December 31,
	2015	$	—
	2016		—
	2017		101
	2018		101
	2019		101
	Years 2020-2024	$	1,298
Schedule of Employee Stock Ownership Plan (ESOP) Disclosures	At December 31, 2014, the remaining principal balance on the ESOP debt is payable as follows:
	Years Ending	Amount
	December 31,
	2015	$	102
	2016		105
	2017		109
	2018		113
	2019		116
	Thereafter		3,730
		$	4,275
	Shares held by the ESOP include the following:
		December 31,
		2014			2013
	Unallocated		408,955			424,271
	Allocated		47,295			34,372
			456,250			458,643
Defined Benefit Obligations
Schedule of Assumptions Used	The assumptions used to determine the benefit obligation are as follows:
		December 31,
		2014			2013
	Discount rate		4	%		5	%
	Rate of compensation increase		3	%		3	%
Net Periodic Benefit Cost
Schedule of Assumptions Used	The assumptions used to determine net periodic pension cost are as follows:
		December 31,
		2014			2013
	Discount rate		5	%		4	%
	Rate of compensation increase		3	%		3	%

STOCK_BASED_COMPENSATION_Table

STOCK BASED COMPENSATION (Tables)	12 Months Ended
	Dec. 31, 2014
Cumulatively Granted Stock Options and Restricted Stock Awards Net of Forfeitures	The following table presents the amount of cumulatively granted stock options and restricted stock awards, net of forfeitures, through December 31, 2014 under the BSB Bancorp, Inc. 2012 Equity Incentive Plan:
	Authorized				Authorized				Authorized				Cumulative Granted								Outstanding
	Stock				Restricted				Total				Net of Forfeitures								Total
	Option Awards				Stock Awards								Stock				Restricted
													Option Awards				Stock Awards
		917,286				366,914				1,284,200				886,040				363,570				1,249,610
Pre-Tax Expense Associated with Stock Option and Restricted Stock Awards and Related Tax Benefits Recognized	The following table presents the pre-tax expense associated with stock option and restricted stock awards and the related tax benefits recognized:
			For the year ended
			December 31,
			2014				2013
	Stock based compensation expense
	Stock options		$	847			$	778
	Restricted stock awards			906				869
	Total stock based award expense		$	1,753			$	1,647
	Related tax benefits recognized in earnings		$	511			$	481
Compensation Cost Related to Non-Vested Awards not Yet Recognized and Weighted Average Recognition Period	Total compensation cost related to non-vested awards not yet recognized and the weighted average period (in years) over which it is expected to be recognized is as follows:
			As of December 31, 2014
			Amount				Weighted
							average period
	Stock options		$	2,195				3
	Restricted stock			2,313				2.9
	Total		$	4,508
Fair Value of Stock Options Granted Estimate on Date of Grant Using Black-Scholes Option-Pricing Model	The Company granted 23,760, 10,000, and 10,414 stock option awards on January 8, 2014, May 1, 2014 and October 8, 2014, respectively. The fair value of the stock options granted was estimated on the date of the grant using the Black-Scholes option pricing model with the following assumptions used:
		•		Expected volatility is based on the standard deviation of the historical volatility of the daily adjusted closing price of the Company’s shares.
		•		Expected term represents the period of time that the option is expected to be outstanding. The Company determined the expected life using the “Simplified Method.”
		•		Expected dividend yield is determined based on management’s expectations regarding issuing dividends in the foreseeable future.
		•		The risk-free interest rate is based on the U.S. Treasury yield curve in effect at the time of grant for a period equivalent to the expected life of the option.
		•		The stock-based compensation expense recognized in earnings is based on the amount of awards ultimately expected to vest, therefore a forfeiture assumption is estimated at the time of grant and revised, if necessary, in subsequent periods if actual forfeitures differ from those estimates. Stock-based compensation expense recognized in 2014 and 2013 has been reduced for annualized estimated forfeitures of 7% for grants to employees, based on historical experience.
			Year ended
			December 31,
			2014
	Date of grant			1/8/14				5/1/14				10/8/14
	Exercise price		$	15.26			$	17.43			$	18.31
	Vesting period (1)			5 years				5 years				5 years
	Expiration date			1/8/24				5/1/24				10/8/24
	Expected volatility			15.64	%			15.98	%			15.69	%
	Expected term			6.5 years				6.5 years				6.5 years
	Expected dividend yield			0	%			0	%			0	%
	Risk free interest rate			2.27	%			2.07	%			1.91	%
	Fair value		$	3.44			$	3.87			$	3.93
	1-	Vesting period begins on the date of grant
	The option exercise price is derived from trading value on the date of grant.
Summary of Stock Option and Restricted Stock Awards	A summary of the status of the Company’s Stock Option and Restricted Stock Awards for the year ended December 31, 2014 is presented in the tables below:
			Outstanding and exercisable												Non-vested
			Stock option				Weighted average				Weighted average				Stock option				Weighted average				Weighted average
			awards				exercise price				remaining				awards				grant date				remaining
											contractual term								fair value				contractual term
	Balance at January 1, 2014			162,370			$	12.04				8.91				690,663			$	4.71				8.95
	Granted			—				—								44,174				3.65				9.28
	Exercised			(23,076	)			12.16				7.97				—				—				—
	Vested			144,248				12.12				7.95				(144,248	)			4.71				7.95
	Forfeited			(917	)			12.04				7.92				(10,250	)			3.93				9.78
	Balance at December 31, 2014			282,625			$	12.08				8.42				580,339			$	4.65				8.81
			Non-vested
			restricted stock
			awards
	Balance at January 1, 2014			287,648
	Granted			4,000
	Vested			(74,554	)
	Balance at December 31, 2014			217,094

EARNINGS_PER_SHARE_Tables

EARNINGS PER SHARE (Tables)	12 Months Ended
	Dec. 31, 2014
Components of Earning Per Share	Earnings per share consisted of the following components for the years ended December 31, 2014, 2013 and 2012:
		December 31,			December 31,			December 31,
		2014			2013			2012
	Net income	$	4,291		$	1,960		$	1,401
	Undistributed earnings attributable to participating securities		(139	)		(79	)		(5	)
	Net income available to common stockholders	$	4,152		$	1,881		$	1,396
	Weighted average shares outstanding, basic		8,361,880			8,419,437			8,727,615
	Effect of dilutive shares		91,547			—			—
	Weighted average shares outstanding, assuming dilution		8,453,427			8,419,437			8,727,615
	Basic EPS	$	0.5		$	0.22		$	0.16
	Effect of dilutive shares		(0.01	)		—			—
	Diluted EPS	$	0.49		$	0.22		$	0.16

FAIR_VALUES_OF_ASSETS_AND_LIAB1

FAIR VALUES OF ASSETS AND LIABILITIES (Tables)	12 Months Ended
	Dec. 31, 2014
Summary of Financial Assets Measured at Fair Value on Recurring Basis	The following table summarizes financial assets measured at fair value on a recurring basis as of December 31, 2014 and 2013, segregated by the level of the valuation inputs within the fair value hierarchy utilized to measure fair value:
		Level 1		Level 2		Level 3		Total
								Fair Value
	At December 31, 2014
	Securities available-for-sale
	Corporate debt securities	$	—	$	22,079	$	—	$	22,079
	Trading securities
	Rabbi trust investments		2,336		—		—		2,336
	Totals	$	2,336	$	22,079	$	—	$	24,415
		Level 1		Level 2		Level 3		Total
								Fair Value
	At December 31, 2013
	Securities available-for-sale
	Corporate debt securities	$	—	$	21,921	$	—	$	21,921
	Trading securities
	Rabbi trust investments		2,181		53		—		2,234
	Totals	$	2,181	$	21,974	$	—	$	24,155
Schedule of Estimated Fair Values and Related Carrying or Notional Amounts of Financial Instruments	The estimated fair values, and related carrying or notional amounts, of the Company’s financial instruments are as follows:
		December 31, 2014
		Carrying		Fair		Level 1		Level 2		Level 3
		Amount		Value
	Financial assets:
	Cash and cash equivalents	$	51,767	$	51,767	$	51,767	$	—	$	—
	Interest-bearing time deposits with other banks		131		132		—		132		—
	Held-to-maturity securities		118,528		119,447		—		119,447		—
	Federal Home Loan Bank stock		13,712		13,712		—		13,712		—
	Loans, net		1,179,399		1,170,663		—		—		1,170,663
	Accrued interest receivable		2,977		2,977		2,977		—		—
	Financial liabilities:
	Deposits		984,562		987,353		758,349		229,004		—
	Federal Home Loan Bank advances		285,100		285,266		—		285,266		—
	Securities sold under agreements to repurchase		1,392		1,392		—		1,392		—
	Other borrowed funds		1,067		1,056		—		1,056		—
	Accrued interest payable		961		961		961		—		—
	Mortgagor’s escrow accounts		1,726		1,726		—		1,726		—
		December 31, 2013
		Carrying		Fair		Level 1		Level 2		Level 3
		Amount		Value
	Financial assets:
	Cash and cash equivalents	$	38,042	$	38,042	$	38,042	$	—	$	—
	Interest-bearing time deposits with other banks		119		119		—		119		—
	Held-to-maturity securities		119,776		118,981		—		118,981		—
	Federal Home Loan Bank stock		7,712		7,712		—		7,712		—
	Loans, net		839,013		833,423		—		—		833,423
	Accrued interest receivable		2,241		2,241		2,241		—		—
	Financial liabilities:
	Deposits		764,753		767,494		618,570		148,924		—
	Federal Home Loan Bank advances		142,100		141,960		—		141,960		—
	Securities sold under agreements to repurchase		2,127		2,127		—		2,127		—
	Other borrowed funds		1,113		1,113		—		1,113		—
	Accrued interest payable		683		683		683		—		—
	Mortgagor’s escrow accounts		1,054		1,054		—		1,054		—
Loans Held for Sale and Impaired Loans
Fair Value of Assets Measured on Nonrecurring Basis	The following table presents certain impaired loans that were remeasured and reported at fair value through a specific valuation allowance allocation of the allowance for loan losses based upon the fair value of the underlying collateral at December 31, 2014 and 2013:
		December 31, 2014
		Level 1		Level 2		Level 3
	Impaired loans	$	—	$	—	$	1,951
	Totals	$	—	$	—	$	1,951
		31-Dec-13
		Level 1		Level 2		Level 3
	Impaired loans	$	—	$	—	$	3,199
	Totals	$	—	$	—	$	3,199
Other Real Estate Owned
Fair Value of Assets Measured on Nonrecurring Basis	The following tables (in thousands) present the non-financial assets that were re-measured and reported at the lower of cost or fair value at the periods indicated:
		December 31, 2014
		Level 1		Level 2		Level 3
	Mortgage servicing rights	$	—	$	—	$	476
	Totals	$	—	$	—	$	476
		31-Dec-13
		Level 1		Level 2		Level 3
	Mortgage servicing rights	$	—	$	—	$	411
	Totals	$	—	$	—	$	411

COMPREHENSIVE_INCOME_Tables

COMPREHENSIVE INCOME (Tables)	12 Months Ended
	Dec. 31, 2014
Schedules of Other Comprehensive Income
			Year Ended December 31, 2014
			Pre Tax			Tax			After Tax
			Amount			Expense			Amount
	Securities available-for-sale:
	Change in unrealized gain/loss during the period		$	230		$	(92	)	$	138
	Reclassification adjustment for net gains included in net income1			—			—			—
	Total securities available for sale			230			(92	)		138
	Defined benefit post-retirement benefit plans:
	Change in unrecognized pension plan benefit			48			(20	)		28
	Total defined-benefit post-retirement benefit plans			48			(20	)		28
	Total other comprehensive income		$	278		$	(112	)	$	166
			Year Ended December 31, 2013
			Pre Tax			Tax (Expense)			After Tax
			Amount			Benefit			Amount
	Securities available-for-sale:
	Change in unrealized gain/loss during the period		$	(454	)	$	173		$	(281	)
	Reclassification adjustment for net gains included in net income1			(34	)		14			(20	)
	Total securities available for sale			(488	)		187			(301	)
	Defined benefit post-retirement benefit plans:
	Change in the actuarial gain/loss			72			(27	)		45
	Total defined-benefit post-retirement benefit plans			72			(27	)		45
	Total other comprehensive loss		$	(416	)	$	160		$	(256	)
			Year Ended December 31, 2012
			Pre Tax			Tax (Expense)			After Tax
			Amount			Benefit			Amount
	Securities available-for-sale:
	Change in unrealized gain/loss during the period		$	138		$	(47	)		91
	Reclassification adjustment for net gains included in net income1			—			—			—
	Total securities available for sale			138			(47	)		91
	Defined benefit post-retirement benefit plans:
	Change in the actuarial gain/loss			(28	)		10			(18	)
	Total defined-benefit post-retirement benefit plans			(28	)		10			(18	)
	Total other comprehensive income		$	110		$	(37	)	$	73
	1-	Reclassification adjustments are comprised of realized security gains and losses. The gains and losses have been reclassified out of accumulated other comprehensive loss and have affected certain lines in the consolidated statements of operations as follows; the pre-tax amount is included in net gain on sales and calls of securities, the tax expense amount is included in income tax expense and the after tax amount is included in net income.
Components of Accumulated Other Comprehensive Loss, included in Stockholders' Equity	The components of accumulated other comprehensive loss, included in stockholders’ equity, are as follows:
			December 31, 2014			December 31, 2013
	Net unrealized holding loss on available-for-sale securities, net of tax		$	(72	)	$	(210	)
	Unrecognized benefit pertaining to defined benefit plan, net of tax			50			22
	Accumulated other comprehensive loss		$	(22	)	$	(188	)

CONDENSED_FINANCIAL_STATEMENTS1

CONDENSED FINANCIAL STATEMENTS OF PARENT COMPANY (Tables)	12 Months Ended
	Dec. 31, 2014
Condensed Balance Sheets	The following condensed financial statements are for the Parent Company only and should be read in conjunction with the consolidated financial statements of the Company.
	Condensed Balance Sheets
		December 31,
		2014			2013
	Assets
	Cash and cash equivalents held at Belmont Savings Bank	$	2,754		$	14,967
	Investment in Belmont Savings Bank		128,495			109,890
	Investment in BSB Funding Corp.		4,867			4,783
	Deferred tax asset		190			500
	Other assets		761			336
	Total assets	$	137,067		$	130,476
	Liabilities and Stockholders’ Equity
	Accrued expenses		41			55
	Other liabilities		16			—
	Total liabilities		57			55
	Stockholders’ equity		137,010			130,421
	Total liabilities and stockholders’ equity	$	137,067		$	130,476
Condensed Statements of Operations	Condensed Statements of Operations
		Years Ended December 31,
		2014			2013			2012
	Interest and dividend income:
	Interest on cash equivalents	$	11		$	27		$	42
	Dividends from subsidiaries		—			—			—
	Total interest and dividend income		11			27			42
	Interest expense:		—			—			—
	Net interest and dividend income		11			27			42
	Non-interest income		—			—			—
	Non-interest expense		269			248			303
	Loss before income taxes and equity in undistributed earnings of subsidiaries		(258	)		(221	)		(261	)
	Income tax (benefit) provision		(156	)		(268	)		(105	)
	(Loss) income before equity in income of subsidiaries		(102	)		47			(156	)
	Equity in undistributed earnings of Belmont Savings Bank		4,308			1,826			1,469
	Equity in undistributed earnings of BSB Funding Corp		85			87			88
	Net income	$	4,291		$	1,960		$	1,401
Condensed Statements of Cash Flows	Condensed Statements of Cash Flows
		Years Ended December 31,
		2014			2013			2012
	Cash flows from operating activities:
	Net income	$	4,291		$	1,960		$	1,401
	Adjustments to reconcile net income to net cash used in operating activities:
	Equity in undistributed earnings of Belmont Savings Bank		(4,308	)		(1,826	)		(1,469	)
	Equity in undistributed earnings of BSB Funding Corp.		(85	)		(87	)		(88	)
	Deferred income tax expense		363			193			52
	Change in deferred tax valuation allowance		(53	)		(180	)		—
	Other, net		(423	)		(239	)		(122	)
	Net cash used in operating activities		(215	)		(179	)		(226	)
	Cash flows from investing activities:
	Investment in Belmont Savings Bank		(12,000	)		(20,000	)		—
	Net cash used in investing activities		(12,000	)		(20,000	)		—
	Cash flows from financing activities:
	Repurchase of common stock		—			(6,478	)		—
	Proceeds from exercise of stock options, net of cash paid		45			—			—
	Restricted stock awards issued, net of awards surrendered		(43	)		—			—
	Net cash provided by (used in) financing activities		2			(6,478	)		—
	Net decrease in cash and cash equivalents		(12,213	)		(26,657	)		(226	)
	Cash and cash equivalents at beginning of period		14,967			41,624			41,850
	Cash and cash equivalents at end of period	$	2,754		$	14,967		$	41,624

QUARTERLY_DATA_UNAUDITED_Table

QUARTERLY DATA (UNAUDITED) (Tables)	12 Months Ended
	Dec. 31, 2014
Quarterly Results of Operations	Quarterly results of operations are as follows:
		Years Ended December 31,
		2014								2013
		Fourth		Third		Second		First		Fourth		Third		Second		First
		Quarter		Quarter		Quarter		Quarter		Quarter		Quarter		Quarter		Quarter
	Interest and dividend income	$	10,600	$	10,036	$	9,268	$	8,751	$	8,875	$	7,995	$	7,136	$	7,005
	Interest expense		2,068		1,896		1,659		1,428		1,316		1,223		1,222		1,226
	Net interest income		8,532		8,140		7,609		7,323		7,559		6,772		5,914		5,779
	Provision for loan losses		565		292		307		388		632		438		100		327
	Net interest income, after provision for loan losses		7,967		7,848		7,302		6,935		6,927		6,334		5,814		5,452
	Non-interest income		920		792		857		722		802		890		908		1,006
	Non-interest expense		6,657		6,656		6,504		6,673		6,797		6,373		6,161		5,800
	Income before taxes		2,230		1,984		1,655		984		932		851		561		658
	Income tax expense		862		782		614		304		287		313		200		242
	Net income	$	1,368	$	1,202	$	1,041	$	680	$	645	$	538	$	361	$	416
	Earnings per common share
	Basic	$	0.16	$	0.14	$	0.12	$	0.08	$	0.07	$	0.06	$	0.04	$	0.05
	Diluted	$	0.16	$	0.14	$	0.12	$	0.08	$	0.07	$	0.06	$	0.04	$	0.05

Recovered_Sheet1

Summary of Significant Accounting Policies - Additional Information (Detail) (USD $)	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2011	Dec. 31, 2013
Significant Accounting Policies [Line Items]
Stock issued, shares		8,993,000
Stock issued, price per share		$10
Gross proceeds		$89,900,000
Shares sold to the Bank's employee stock ownership plan	458,643	458,643
Due days of accrual of interest on all loans	90 days
Originate loans with a loan-to-value	80.00%
Other liabilities	9,707,000		8,107,000
Maximum
Significant Accounting Policies [Line Items]
Insured amount for per account deposit by Bank Insurance Fund	250,000
Life insurance policy with individual carrier as a percentage of tier one capital	15.00%
Total Cash Surrender Value of life insurance policies as a percentage of tier one capital	25.00%
Commitments to Grant Loans
Significant Accounting Policies [Line Items]
Other liabilities	88,000		114,000
Belmont Savings Bank
Significant Accounting Policies [Line Items]
Stock issued, shares		179,860
Cash contribution to charity		$200,000

Recovered_Sheet2

Restrictions on Cash and Amounts due From Banks - Additional Information (Detail) (USD $)	Dec. 31, 2014	Dec. 31, 2013
Restricted Cash and Cash Equivalents Items [Line Items]
Cash and cash equivalents subject to withdrawals and usage restrictions	$15,263,000	$8,816,000

Amortized_Cost_of_Available_fo

Amortized Cost of Available for Sale and Held-to-Maturity Securities (Detail) (USD $)	Dec. 31, 2014	Dec. 31, 2013
In Thousands, unless otherwise specified
Schedule of Available-for-sale Securities [Line Items]
Available-for-sale Securities, Amortized Cost Basis	$22,199	$22,271
Available-for-sale Securities, Gross Unrealized Gains	86	75
Available-for-sale Securities, Gross Unrealized Losses	-206	-425
Available-for-sale Securities, Fair Value	22,079	21,921
Held-to-maturity securities, Amortized Cost Basis	118,528	119,776
Held-to-maturity securities, Gross Unrealized Gains	1,183	692
Held-to-maturity securities, Gross Unrealized Losses	-264	-1,487
Held-to-maturity securities, Fair Value	119,447	118,981
Corporate debt securities
Schedule of Available-for-sale Securities [Line Items]
Available-for-sale Securities, Amortized Cost Basis	22,199	22,271
Available-for-sale Securities, Gross Unrealized Gains	86	75
Available-for-sale Securities, Gross Unrealized Losses	-206	-425
Available-for-sale Securities, Fair Value	22,079	21,921
Held-to-maturity securities, Amortized Cost Basis	17,551	20,519
Held-to-maturity securities, Gross Unrealized Gains	164	120
Held-to-maturity securities, Gross Unrealized Losses	-37	-489
Held-to-maturity securities, Fair Value	17,678	20,150
U.S. government sponsored mortgage-backed securities
Schedule of Available-for-sale Securities [Line Items]
Held-to-maturity securities, Amortized Cost Basis	100,977	99,257
Held-to-maturity securities, Gross Unrealized Gains	1,019	572
Held-to-maturity securities, Gross Unrealized Losses	-227	-998
Held-to-maturity securities, Fair Value	$101,769	$98,831

Amortized_Cost_Basis_and_Estim

Amortized Cost Basis and Estimated Fair Value of Debt Securities by Contractual Maturity (Detail) (USD $)	Dec. 31, 2014
In Thousands, unless otherwise specified
Investments Classified by Contractual Maturity Date [Line Items]
Due within one year, Available-for-sale Securities, Amortized Cost Basis	$0
Due after one year through five years, Available-for-sale Securities, Amortized Cost Basis	12,807
Due after five years through ten years, Available-for-sale Securities, Amortized Cost Basis	9,392
Due after ten years, Available-for-sale Securities, Amortized Cost Basis	0
Due within one year, Available-for-sale Securities, Fair Value	0
Due after one year through five years, Available-for-sale Securities, Fair Value	12,893
Due after five years through ten years, Available-for-sale Securities, Fair Value	9,186
Due after ten years, Available-for-sale Securities, Fair Value	0
Due within one year, Held-to-Maturity, Amortized Cost Basis	0
Due after one year through five years, Held-to-Maturity, Amortized Cost Basis	7,277
Due after five years through ten years, Held-to-Maturity, Amortized Cost Basis	65,912
Due after ten years, Held-to-Maturity, Amortized Cost Basis	45,339
Due within one year, Held-to-Maturity, Fair Value	0
Due after one year through five years, Held-to-Maturity, Fair Value	7,355
Due after five years through ten years, Held-to-Maturity, Fair Value	66,256
Due after ten years, Held-to-Maturity, Fair Value	$45,836

Securities_Additional_Informat

Securities - Additional Information (Detail) (USD $)	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013
Investment Securities [Line Items]
Securities pledged to secure securities sold under agreements to repurchase	$3,830,000	$4,832,000
Securities pledged to secure borrowings with Federal Home Loan Bank	51,062,000	48,133,000
Securities pledged to secure available line of credit with Federal Home Loan Bank	15,662,000	3,016,000
Number of securities that had unrealized losses	21
Securities that had unrealized losses, aggregate depreciation percentage	1.31%
Rabbi Trust
Investment Securities [Line Items]
Trading securities, fair value	2,300,000	2,200,000
Trading securities, unrealized holding gain (loss)	$65,000	$81,000

Sales_of_Securities_Available_

Sales of Securities Available for Sale (Detail) (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2013
Schedule of Available-for-sale Securities [Line Items]
Proceeds from sales	$17,985
Gross realized gains	64
Gross realized losses	-30
Tax expense of securities gains/losses	$14

Securities_with_Gross_Unrealiz

Securities with Gross Unrealized Losses Aggregated by Investment Category and Length of Time (Detail) (USD $)	Dec. 31, 2014	Dec. 31, 2013
In Thousands, unless otherwise specified
Investments, Unrealized Loss Position [Line Items]
Less than 12 Months, Fair Value	$15,665	$74,053
Less than 12 Months, Unrealized Losses	-71	-1,517
12 Months or longer, Fair Value	19,822	4,058
12 Months or longer, Unrealized Losses	-399	-395
Corporate debt securities
Investments, Unrealized Loss Position [Line Items]
Less than 12 Months, Fair Value		4,970
Less than 12 Months, Unrealized Losses		-30
12 Months or longer, Fair Value	4,185	4,052
12 Months or longer, Unrealized Losses	-206	-395
Held-to-maturity Securities | Corporate debt securities
Investments, Unrealized Loss Position [Line Items]
Less than 12 Months, Fair Value	4,691	10,010
Less than 12 Months, Unrealized Losses	-37	-489
U.S. government sponsored mortgage-backed securities | Held-to-maturity Securities
Investments, Unrealized Loss Position [Line Items]
Less than 12 Months, Fair Value	10,974	59,073
Less than 12 Months, Unrealized Losses	-34	-998
12 Months or longer, Fair Value	15,637	6
12 Months or longer, Unrealized Losses	($193)

Summary_of_Loans_Detail

Summary of Loans (Detail) (USD $)	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
In Thousands, unless otherwise specified
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans Balance	$1,180,663	$841,932
Net deferred loan costs	5,068	3,535
Net unamortized mortgage premiums	2,549	1,504
Allowance for loan losses	-8,881	-7,958	-6,440	-4,776
Total loans, net	1,179,399	839,013
Construction loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans Balance	31,389	9,965
Allowance for loan losses	-228	-134	-198	-188
Commercial real estate loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans Balance	395,178	320,807
Allowance for loan losses	-4,043	-3,621	-3,039	-1,969
Home equity loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans Balance	131,628	92,461
Allowance for loan losses	-828	-681	-466	-632
Commercial loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans Balance	39,161	30,691
Allowance for loan losses	-458	-419	-470	-321
Residential one-to-four family
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans Balance	450,572	287,652
Allowance for loan losses	-2,364	-2,189	-1,412	-986
Consumer loans Indirect auto loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans Balance	131,961	99,798
Allowance for loan losses	-778	-749	-772	-664
Consumer loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans Balance	774	558
Allowance for loan losses	-11	-26	-19	-16
Mortgage loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans Balance	1,008,767	710,885
Mortgage loans | Construction loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans Balance	31,389	9,965
Mortgage loans | Commercial real estate loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans Balance	395,178	320,807
Mortgage loans | Home equity loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans Balance	131,628	92,461
Mortgage loans | Residential one-to-four family
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans Balance	450,572	287,652
Consumer Loan
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans Balance	171,896	131,047
Consumer Loan | Commercial loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans Balance	39,161	30,691
Consumer Loan | Consumer loans Indirect auto loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans Balance	131,961	99,798
Consumer Loan | Consumer loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans Balance	$774	$558

Allowance_for_Loan_Losses_by_P

Allowance for Loan Losses by Portfolio Class (Detail) (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Financing Receivable, Allowance for Credit Losses [Line Items]
Beginning balance	$7,958	$6,440	$4,776
Provision (benefit)	1,552	1,498	2,736
Charge-offs	-658	-135	-1,269
Recoveries	29	155	197
Ending balance	8,881	7,958	6,440
Construction loans
Financing Receivable, Allowance for Credit Losses [Line Items]
Beginning balance	134	198	188
Provision (benefit)	94	-64	10
Ending balance	228	134	198
Commercial real estate loans
Financing Receivable, Allowance for Credit Losses [Line Items]
Beginning balance	3,621	3,039	1,969
Provision (benefit)	422	582	1,070
Ending balance	4,043	3,621	3,039
Commercial loans
Financing Receivable, Allowance for Credit Losses [Line Items]
Beginning balance	419	470	321
Provision (benefit)	43	-51	149
Charge-offs	-4
Ending balance	458	419	470
Home equity loans
Financing Receivable, Allowance for Credit Losses [Line Items]
Beginning balance	681	466	632
Provision (benefit)	346	235	453
Charge-offs	-199	-20	-715
Recoveries			96
Ending balance	828	681	466
Residential one-to-four family
Financing Receivable, Allowance for Credit Losses [Line Items]
Beginning balance	2,189	1,412	986
Provision (benefit)	550	709	608
Charge-offs	-375		-225
Recoveries		68	43
Ending balance	2,364	2,189	1,412
Consumer loans Indirect auto loans
Financing Receivable, Allowance for Credit Losses [Line Items]
Beginning balance	749	772	664
Provision (benefit)	65	-30	343
Charge-offs	-51	-62	-281
Recoveries	15	69	46
Ending balance	778	749	772
Consumer loans
Financing Receivable, Allowance for Credit Losses [Line Items]
Beginning balance	26	19	16
Provision (benefit)		42	39
Charge-offs	-29	-53	-48
Recoveries	14	18	12
Ending balance	11	26	19
Unallocated
Financing Receivable, Allowance for Credit Losses [Line Items]
Beginning balance	139	64
Provision (benefit)	32	75	64
Ending balance	$171	$139	$64

Individually_Impaired_Loans_by

Individually Impaired Loans by Class of Loans (Detail) (USD $)	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
In Thousands, unless otherwise specified
Financing Receivable, Allowance for Credit Losses [Line Items]
Individually evaluated for impairment, Loan balance	$10,446	$11,480
Individually evaluated for impairment, Loan allowance	193	880
Collectively evaluated for impairment, Loan balance	1,170,217	830,452
Collectively evaluated for impairment, Loan allowance	8,688	7,078
Total Loan balance	1,180,663	841,932
Total Loan, allowance	8,881	7,958	6,440	4,776
Construction loans
Financing Receivable, Allowance for Credit Losses [Line Items]
Collectively evaluated for impairment, Loan balance	31,389	9,965
Collectively evaluated for impairment, Loan allowance	228	134
Total Loan balance	31,389	9,965
Total Loan, allowance	228	134	198	188
Commercial real estate loans
Financing Receivable, Allowance for Credit Losses [Line Items]
Individually evaluated for impairment, Loan balance	3,882	4,081
Individually evaluated for impairment, Loan allowance	5	11
Collectively evaluated for impairment, Loan balance	391,296	316,726
Collectively evaluated for impairment, Loan allowance	4,038	3,610
Total Loan balance	395,178	320,807
Total Loan, allowance	4,043	3,621	3,039	1,969
Commercial loans
Financing Receivable, Allowance for Credit Losses [Line Items]
Collectively evaluated for impairment, Loan balance	39,161	30,691
Collectively evaluated for impairment, Loan allowance	458	419
Total Loan balance	39,161	30,691
Total Loan, allowance	458	419	470	321
Home equity loans
Financing Receivable, Allowance for Credit Losses [Line Items]
Individually evaluated for impairment, Loan balance	296	400
Collectively evaluated for impairment, Loan balance	131,332	92,061
Collectively evaluated for impairment, Loan allowance	828	681
Total Loan balance	131,628	92,461
Total Loan, allowance	828	681	466	632
Residential one-to-four family
Financing Receivable, Allowance for Credit Losses [Line Items]
Individually evaluated for impairment, Loan balance	6,256	6,982
Individually evaluated for impairment, Loan allowance	188	869
Collectively evaluated for impairment, Loan balance	444,316	280,670
Collectively evaluated for impairment, Loan allowance	2,176	1,320
Total Loan balance	450,572	287,652
Total Loan, allowance	2,364	2,189	1,412	986
Consumer loans Indirect auto loans
Financing Receivable, Allowance for Credit Losses [Line Items]
Individually evaluated for impairment, Loan balance	12	16
Collectively evaluated for impairment, Loan balance	131,949	99,782
Collectively evaluated for impairment, Loan allowance	778	749
Total Loan balance	131,961	99,798
Total Loan, allowance	778	749	772	664
Consumer loans
Financing Receivable, Allowance for Credit Losses [Line Items]
Individually evaluated for impairment, Loan balance		1
Collectively evaluated for impairment, Loan balance	774	557
Collectively evaluated for impairment, Loan allowance	11	26
Total Loan balance	774	558
Total Loan, allowance	11	26	19	16
Unallocated
Financing Receivable, Allowance for Credit Losses [Line Items]
Collectively evaluated for impairment, Loan allowance	171	139
Total Loan, allowance	$171	$139	$64

Impaired_Loans_Detail

Impaired Loans (Detail) (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Financing Receivable, Allowance for Credit Losses [Line Items]
Impaired loans with a related allowance for credit losses at, Recorded Investment	$4,246	$6,935
Impaired loans with a related allowance for credit losses at, Unpaid Principal Balance	4,246	6,935
Impaired loans with a related allowance for credit losses at, Average recorded Investment	193	880
Impaired loans with no related allowance for credit losses, Recorded Investment	6,200	4,545
Impaired loans with no related allowance for credit losses, Unpaid Principal Balance	6,361	4,744
Impaired loans with no related allowance for credit losses at, Average recorded Investment	0	0
Impaired loans with a related allowance for credit losses, Average recorded Investment	4,677	4,390	1,757
Impaired loans with a related allowance for credit losses, Income Recognized	222	69	14
Impaired loans with no related allowance for credit losses, Average recorded Investment	4,976	8,183	4,340
Impaired loans with no related allowance for credit losses, Interest income recognized	125	265	125
Construction loans
Financing Receivable, Allowance for Credit Losses [Line Items]
Impaired loans with no related allowance for credit losses at, Average recorded Investment	0	0
Commercial real estate loans
Financing Receivable, Allowance for Credit Losses [Line Items]
Impaired loans with a related allowance for credit losses at, Recorded Investment	3,060	3,111
Impaired loans with a related allowance for credit losses at, Unpaid Principal Balance	3,060	3,111
Impaired loans with a related allowance for credit losses at, Average recorded Investment	5	11
Impaired loans with no related allowance for credit losses, Recorded Investment	822	970
Impaired loans with no related allowance for credit losses, Unpaid Principal Balance	822	970
Impaired loans with no related allowance for credit losses at, Average recorded Investment	0	0
Impaired loans with a related allowance for credit losses, Average recorded Investment	3,085	1,824
Impaired loans with a related allowance for credit losses, Income Recognized	115	59
Impaired loans with no related allowance for credit losses, Average recorded Investment	887	2,258	889
Impaired loans with no related allowance for credit losses, Interest income recognized	34	118	32
Commercial loans
Financing Receivable, Allowance for Credit Losses [Line Items]
Impaired loans with no related allowance for credit losses at, Average recorded Investment	0	0
Impaired loans with no related allowance for credit losses, Average recorded Investment			35
Impaired loans with no related allowance for credit losses, Interest income recognized			4
Home equity loans
Financing Receivable, Allowance for Credit Losses [Line Items]
Impaired loans with no related allowance for credit losses, Recorded Investment	296	400
Impaired loans with no related allowance for credit losses, Unpaid Principal Balance	298	599
Impaired loans with no related allowance for credit losses at, Average recorded Investment	0	0
Impaired loans with a related allowance for credit losses, Average recorded Investment			432
Impaired loans with a related allowance for credit losses, Income Recognized			3
Impaired loans with no related allowance for credit losses, Average recorded Investment	398	462	410
Impaired loans with no related allowance for credit losses, Interest income recognized	8	17	13
Residential one-to-four family
Financing Receivable, Allowance for Credit Losses [Line Items]
Impaired loans with a related allowance for credit losses at, Recorded Investment	1,186	3,824
Impaired loans with a related allowance for credit losses at, Unpaid Principal Balance	1,186	3,824
Impaired loans with a related allowance for credit losses at, Average recorded Investment	188	869
Impaired loans with no related allowance for credit losses, Recorded Investment	5,070	3,158
Impaired loans with no related allowance for credit losses, Unpaid Principal Balance	5,229	3,158
Impaired loans with no related allowance for credit losses at, Average recorded Investment	0	0
Impaired loans with a related allowance for credit losses, Average recorded Investment	1,592	2,566	1,325
Impaired loans with a related allowance for credit losses, Income Recognized	107	10	11
Impaired loans with no related allowance for credit losses, Average recorded Investment	3,689	5,460	3,006
Impaired loans with no related allowance for credit losses, Interest income recognized	83	130	76
Consumer loans Indirect auto loans
Financing Receivable, Allowance for Credit Losses [Line Items]
Impaired loans with no related allowance for credit losses, Recorded Investment	12	16
Impaired loans with no related allowance for credit losses, Unpaid Principal Balance	12	16
Impaired loans with no related allowance for credit losses at, Average recorded Investment	0	0
Impaired loans with no related allowance for credit losses, Average recorded Investment	2	3
Consumer loans
Financing Receivable, Allowance for Credit Losses [Line Items]
Impaired loans with no related allowance for credit losses, Recorded Investment		1
Impaired loans with no related allowance for credit losses, Unpaid Principal Balance		1
Impaired loans with no related allowance for credit losses at, Average recorded Investment	$0	$0

Past_Due_and_NonAccrual_Loans_

Past Due and Non-Accrual Loans (Detail) (USD $)	Dec. 31, 2014	Dec. 31, 2013
In Thousands, unless otherwise specified
Financing Receivable, Allowance for Credit Losses [Line Items]
30-59 Days	$733	$1,546
60-89 Days	275
90 Days or More	2,540	1,966
Total Past Due	3,548	3,512
90 days or more and accruing	0	0
Loans on Non-accrual	2,770	4,115
Consumer Loan | Commercial loans
Financing Receivable, Allowance for Credit Losses [Line Items]
90 days or more and accruing	0	0
Consumer Loan | Consumer loans Indirect auto loans
Financing Receivable, Allowance for Credit Losses [Line Items]
30-59 Days	463	222
60-89 Days	45
90 Days or More	12	16
Total Past Due	520	238
90 days or more and accruing	0	0
Loans on Non-accrual	12	16
Consumer Loan | Consumer loans
Financing Receivable, Allowance for Credit Losses [Line Items]
90 Days or More		1
Total Past Due		1
90 days or more and accruing	0	0
Loans on Non-accrual		1
Real estate loans | Construction loans
Financing Receivable, Allowance for Credit Losses [Line Items]
90 days or more and accruing	0	0
Real estate loans | Commercial real estate loans
Financing Receivable, Allowance for Credit Losses [Line Items]
90 Days or More		38
Total Past Due		38
90 days or more and accruing	0	0
Loans on Non-accrual		38
Real estate loans | Home equity loans
Financing Receivable, Allowance for Credit Losses [Line Items]
30-59 Days	270	914
90 Days or More	96
Total Past Due	366	914
90 days or more and accruing	0	0
Loans on Non-accrual	96	200
Real estate loans | Residential one-to-four family
Financing Receivable, Allowance for Credit Losses [Line Items]
30-59 Days		410
60-89 Days	230
90 Days or More	2,432	1,911
Total Past Due	2,662	2,321
90 days or more and accruing	0	0
Loans on Non-accrual	$2,662	$3,860

Loans_Classified_by_Risk_Ratin

Loans Classified by Risk Rating (Detail) (USD $)	Dec. 31, 2014		Dec. 31, 2013
In Thousands, unless otherwise specified
Financing Receivable, Recorded Investment [Line Items]
Total Loans Balance	$1,180,663		$841,932
Construction loans
Financing Receivable, Recorded Investment [Line Items]
Total Loans Balance	31,389		9,965
Commercial real estate loans
Financing Receivable, Recorded Investment [Line Items]
Total Loans Balance	395,178		320,807
Commercial loans
Financing Receivable, Recorded Investment [Line Items]
Total Loans Balance	39,161		30,691
Home equity loans
Financing Receivable, Recorded Investment [Line Items]
Total Loans Balance	131,628		92,461
Residential one-to-four family
Financing Receivable, Recorded Investment [Line Items]
Total Loans Balance	450,572		287,652
Consumer loans Indirect auto loans
Financing Receivable, Recorded Investment [Line Items]
Total Loans Balance	131,961		99,798
Consumer loans
Financing Receivable, Recorded Investment [Line Items]
Total Loans Balance	774		558
Loans rated 1-3
Financing Receivable, Recorded Investment [Line Items]
Total Loans Balance	457,061		347,701
Loans rated 1-3 | Construction loans
Financing Receivable, Recorded Investment [Line Items]
Total Loans Balance	31,389		9,965
Loans rated 1-3 | Commercial real estate loans
Financing Receivable, Recorded Investment [Line Items]
Total Loans Balance	386,513		307,093
Loans rated 1-3 | Commercial loans
Financing Receivable, Recorded Investment [Line Items]
Total Loans Balance	39,159		30,643
Loans rated 4
Financing Receivable, Recorded Investment [Line Items]
Total Loans Balance	1,136		7,657
Loans rated 4 | Commercial real estate loans
Financing Receivable, Recorded Investment [Line Items]
Total Loans Balance			4,277
Loans rated 4 | Commercial loans
Financing Receivable, Recorded Investment [Line Items]
Total Loans Balance	2		48
Loans rated 4 | Home equity loans
Financing Receivable, Recorded Investment [Line Items]
Total Loans Balance			200
Loans rated 4 | Residential one-to-four family
Financing Receivable, Recorded Investment [Line Items]
Total Loans Balance	1,134		3,123
Loans rated 4 | Consumer loans
Financing Receivable, Recorded Investment [Line Items]
Total Loans Balance			9
Loans rated 5
Financing Receivable, Recorded Investment [Line Items]
Total Loans Balance	12,960		15,053
Loans rated 5 | Commercial real estate loans
Financing Receivable, Recorded Investment [Line Items]
Total Loans Balance	8,665		9,437
Loans rated 5 | Home equity loans
Financing Receivable, Recorded Investment [Line Items]
Total Loans Balance	895		999
Loans rated 5 | Residential one-to-four family
Financing Receivable, Recorded Investment [Line Items]
Total Loans Balance	3,400		4,613
Loans rated 5 | Consumer loans
Financing Receivable, Recorded Investment [Line Items]
Total Loans Balance			4
Loans not rated
Financing Receivable, Recorded Investment [Line Items]
Total Loans Balance	709,506	[1]	471,521	[1]
Loans not rated | Home equity loans
Financing Receivable, Recorded Investment [Line Items]
Total Loans Balance	130,733	[1]	91,262	[1]
Loans not rated | Residential one-to-four family
Financing Receivable, Recorded Investment [Line Items]
Total Loans Balance	446,038	[1]	279,916	[1]
Loans not rated | Consumer loans Indirect auto loans
Financing Receivable, Recorded Investment [Line Items]
Total Loans Balance	131,961	[1]	99,798	[1]
Loans not rated | Consumer loans
Financing Receivable, Recorded Investment [Line Items]
Total Loans Balance	$774	[1]	$545	[1]
[1]	Residential real estate, home equity, indirect auto and consumer loans are not formally risk rated by the Company unless the loans become delinquent.

Loans_Additional_Information_D

Loans - Additional Information (Detail) (USD $)	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013
	Contract	Contract
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total TDRs	$9,226,000	$9,266,000
Number of Contracts	4	5
TDR's defaulted modification, number of contracts	2	0
Financing receivables that have been modified by TDR's and subsequently defaulted, carrying amount	1,900,000
Financing receivables that have been modified by TDR's and subsequently defaulted, charge offs	573,000
Financing receivables that have been modified by TDR's and subsequently defaulted, allowances previously reported	555,000
Loans pledged to secure FHLB advances.	518,400,000	415,900,000
Non Accrual Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total TDRs	1,551,000
Residential one-to-four family
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing receivables that have been modified by TDR's and subsequently defaulted, carrying amount		1,700,000
Financing receivables that have been modified by TDR's and subsequently defaulted, charge offs		$200,000
Troubled debt restructurings
Accounts, Notes, Loans and Financing Receivable [Line Items]
Number of Contracts	4	5

Troubled_Debt_Restructuring_Ac

Troubled Debt Restructuring Accrual Status (Detail) (USD $)	Dec. 31, 2014	Dec. 31, 2013
Financing Receivable, Recorded Investment [Line Items]
Total TDRs	$9,226,000	$9,266,000
Amount of specific allocation included in the allowance for loan losses associated with TDRs	174,000	543,000
Additional commitments to lend to a borrower who has been a party to a TDR	0	0
Accrual Loans
Financing Receivable, Recorded Investment [Line Items]
Total TDRs	7,675,000	7,366,000
Non Accrual Loans
Financing Receivable, Recorded Investment [Line Items]
Total TDRs	$1,551,000	$1,900,000

Troubled_Debt_Restructurings_o

Troubled Debt Restructurings on Financing Receivables (Detail) (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2014		Dec. 31, 2013
	Contract		Contract
Financing Receivable, Modifications [Line Items]
Number of Contracts	4		5
Pre-modification outstanding recorded investment	$3,306		$5,079
Post-modification outstanding recorded investment	3,343	[1]	4,506	[1]
Home equity loans
Financing Receivable, Modifications [Line Items]
Number of Contracts	1
Pre-modification outstanding recorded investment	200
Post-modification outstanding recorded investment	200	[1]
Real estate loans | Commercial real estate loans
Financing Receivable, Modifications [Line Items]
Number of Contracts	1		4
Pre-modification outstanding recorded investment	882		4,732
Post-modification outstanding recorded investment	882	[1]	4,128	[1]
Real estate loans | Residential one-to-four family
Financing Receivable, Modifications [Line Items]
Number of Contracts	2		1
Pre-modification outstanding recorded investment	2,224		347
Post-modification outstanding recorded investment	$2,261	[1]	$378	[1]
[1]	The post-modification balances represent the balance of the loan on the date of modifications. These amounts may show an increase when modifications include a capitalization of interest or taxes.

Post_Modification_of_Troubled_

Post Modification of Troubled Debt Restructuring Balance (Detail) (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2014		Dec. 31, 2013
Troubled Debt Restructuring, Debtor, Subsequent Periods [Line Items]
Post-modification outstanding recorded investment	$3,343	[1]	$4,506	[1]
Extended Maturity
Troubled Debt Restructuring, Debtor, Subsequent Periods [Line Items]
Post-modification outstanding recorded investment	882		1,370
Adjusted Interest Rate
Troubled Debt Restructuring, Debtor, Subsequent Periods [Line Items]
Post-modification outstanding recorded investment	561		3,136
Interest only
Troubled Debt Restructuring, Debtor, Subsequent Periods [Line Items]
Post-modification outstanding recorded investment	$1,900
[1]	The post-modification balances represent the balance of the loan on the date of modifications. These amounts may show an increase when modifications include a capitalization of interest or taxes.

Transfers_and_Servicing_Additi

Transfers and Servicing - Additional Information (Detail) (USD $)	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012	Mar. 16, 2006
				Loan
Securitization or Asset-backed Financing Arrangement, Financial Asset for which Transfer is Accounted as Sale [Line Items]
Principal balance of loans sold to another financial institution				$10,500,000
Number of loans sold to another financial institution				17
Initial period for repurchase of loan	120 months
Repurchase Agreement	Loan that becomes 90 days past due
Valuation allowance adjustment	-12,000	43,000	36,000
Residential Mortgage
Securitization or Asset-backed Financing Arrangement, Financial Asset for which Transfer is Accounted as Sale [Line Items]
Proceed from sale of loans	16,000,000	34,200,000	97,700,000
Gains(loss) from sale of loans	348,000	798,000	1,731,000
Loans previously sold and serviced	69,500,000	61,200,000
Transferred and Servicing Loan
Securitization or Asset-backed Financing Arrangement, Financial Asset for which Transfer is Accounted as Sale [Line Items]
Total principal balance of loans	1,100,000	1,100,000
Consumer loans Indirect auto loans
Securitization or Asset-backed Financing Arrangement, Financial Asset for which Transfer is Accounted as Sale [Line Items]
Proceed from sale of loans	17,500,000	63,600,000	99,700,000
Gains(loss) from sale of loans	138,000	226,000	789,000
Loans previously sold and serviced	$94,700,000	$124,800,000

Changes_in_Mortgage_Servicing_

Changes in Mortgage Servicing Rights (Detail) (USD $)	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Servicing Asset at Amortized Cost [Line Items]
Balance at beginning of period	$411,000	$353,000
Capitalization	128,000	202,000	421,000
Amortization	-75,000	-101,000	-32,000
Valuation allowance adjustment	12,000	-43,000	-36,000
Balance at end of period	$476,000	$411,000	$353,000

Summary_of_Cost_and_Accumulate

Summary of Cost and Accumulated Depreciation of Premises and Equipment (Detail) (USD $)	Dec. 31, 2014	Dec. 31, 2013
In Thousands, unless otherwise specified
Property, Plant and Equipment [Line Items]
Land	$161	$161
Buildings	3,505	3,331
Leasehold improvements	2,165	2,152
Furniture and equipment	6,040	5,925
Property, Plant and Equipment, Gross, Total	11,871	11,569
Accumulated depreciation	-8,805	-8,242
Premises and equipment, net	$3,066	$3,327

Premises_and_Equipment_Additio

Premises and Equipment - Additional Information (Detail) (USD $)	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Property, Plant and Equipment [Line Items]
Depreciation and amortization expense	$761,000	$716,000	$517,000
Assets impairment charges	$3,000	$41,000

Deposits_Additional_Informatio

Deposits - Additional Information (Detail) (USD $)	Dec. 31, 2014	Dec. 31, 2013
In Millions, unless otherwise specified
Time Deposits [Line Items]
Aggregate amount of time deposits	$37.10	$23.50
Brokered deposits included in time deposits	$85.10	$18.70

Scheduled_Maturities_of_Time_D

Scheduled Maturities of Time Deposits (Detail) (USD $)	Dec. 31, 2014
In Thousands, unless otherwise specified
Time Deposits [Line Items]
2015	$62,028
2016	25,969
2017	26,375
2018	68,030
2019	43,811
Time Deposits Total	$226,213

ShortTerm_Borrowings_Additiona

Short-Term Borrowings - Additional Information (Detail) (USD $)	Dec. 31, 2014	Dec. 31, 2013
Short-term Debt [Line Items]
Federal Home Loan Bank advances, short-term	$182,000,000	$80,000,000
Federal Home Loan Bank advances weighted average interest rate, short term	0.25%	0.17%
Securities sold under agreements to repurchase	$1,392,000	$2,127,000
Securities sold under agreements to repurchase, weighted average interest rate	0.15%	0.15%

LongTerm_Debt_Consisting_FHLB_

Long-Term Debt Consisting FHLB Advances (Detail) (USD $)	Dec. 31, 2014	Dec. 31, 2013
In Thousands, unless otherwise specified
Federal Home Loan Bank, Advances, Branch of FHLB Bank [Line Items]
2014		$9,000
2015	14,100	14,100
2016	7,000	7,000
2017	35,000	15,000
2018	27,000	17,000
2019	20,000
Long-term Federal Home Loan Bank Advances, Total	$103,100	$62,100
2014		1.26%
2015	1.17%	1.17%
2016	1.39%	1.39%
2017	1.14%	0.90%
2018	1.88%	1.93%
2019	1.89%
Federal Home Loan Bank, Advances, Maturities Summary, Average Interest Rate	1.50%	1.35%

Allocation_of_Federal_and_Stat

Allocation of Federal and State Income Taxes between Current and Deferred Portions (Detail) (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Components Of Income Tax Expense Benefit [Line Items]
Federal	$2,517	$1,615	$401
State	653	388	59
Total current tax provision	3,170	2,003	460
Federal	-419	-606	195
State	-136	-175	58
Total deferred tax provision	-555	-781	253
Change in valuation allowance	-53	-180
Total provision for income taxes	$2,562	$1,042	$713

Summary_of_Reasons_for_Differe

Summary of Reasons for Differences between Statutory Income Tax Rate and Effective Tax Rate (Detail)	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Schedule Of Effective Tax Rates Line Items
Statutory federal tax rate	34.00%	34.00%	34.00%
State taxes, net of federal tax benefit	5.00%	4.80%	3.70%
Bank-owned life insurance	-3.90%	-4.10%	-5.80%
Change in valuation allowance	-0.80%	-6.00%
Share based compensation	2.90%	5.60%	1.30%
Other, net	0.20%	0.40%	0.50%
Effective tax rates	37.40%	34.70%	33.70%

Components_of_Net_Deferred_Tax

Components of Net Deferred Tax Asset (Detail) (USD $)	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
In Thousands, unless otherwise specified
Schedule of Deferred Tax Assets and Liabilities [Line Items]
Employee benefit and deferred compensation plans	$3,035	$2,766
Allowance for loan losses	3,582	3,224
Depreciation	90
Accrued rent	11	11
Interest on non-performing loans	8	8
Stock options	272	144
Charitable contribution carryover	190	502
Unrealized loss on securities available for sale	48	140
ESOP	74	53
Gross deferred tax assets	7,310	6,848
Valuation allowance		-53	-233	-233
Deferred tax asset	7,310	6,795
Mortgage servicing rights	-190	-164
Deferred loan origination costs	-934	-624
Restricted stock awards	-483	-651
Depreciation		-110
Unrecognized retirement benefit	-34	-14
Other	-27	-86
Deferred Tax Liabilities, Gross	-1,668	-1,649
Net deferred tax asset	$5,642	$5,146

Schedule_of_Valuation_Reserve_

Schedule of Valuation Reserve (Detail) (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2011
Valuation Allowance [Line Items]
Balance at beginning of year	($53)	($233)	($233)
Change in valuation allowance	-53	-180
Balance at ending of year		-53	-233
Valuation Allowances
Valuation Allowance [Line Items]
Change in valuation allowance	$53	$180

Income_Taxes_Additional_Inform

Income Taxes - Additional Information (Detail) (USD $)	12 Months Ended
In Millions, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013
Income Tax [Line Items]
Retained earnings which federal and state income taxes have not been provided	$3.60	$3.60
Period for recapture in taxable income if no longer qualifies as a bank	4 years
Federal and state tax rate applicable if no longer qualifies as a bank	40.00%

Financial_Instruments_Outstand

Financial Instruments Outstanding whose Contract Amounts Represent Credit Risk (Detail) (USD $)	Dec. 31, 2014	Dec. 31, 2013
In Thousands, unless otherwise specified
Commitments to Grant Loans
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]
Financial instruments with off-balance-sheet risk	$21,594	$27,588
Unfunded Commitments under Line Of Credit
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]
Financial instruments with off-balance-sheet risk	183,512	132,825
Unfunded Commitments for Construction Loans
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]
Financial instruments with off-balance-sheet risk	13,466	14,066
Standby Letters of Credit
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]
Financial instruments with off-balance-sheet risk	177	80
Loan Purchase Commitments
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]
Financial instruments with off-balance-sheet risk	$32,883	$15,383

OffBalance_Sheet_Activities_Ad

Off-Balance Sheet Activities - Additional Information (Detail)	12 Months Ended
	Dec. 31, 2014
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]
Letters of credit issued expiration period	1 year

Future_Minimum_Rent_Commitment

Future Minimum Rent Commitments under Operating Leases (Detail) (USD $)	Dec. 31, 2014
In Thousands, unless otherwise specified
Leases Future Minimum Payments [Line Items]
2015	$427
2016	413
2017	322
2018	276
2019	281
Thereafter	503
Total	$2,222

Recovered_Sheet3

Commitments and Contingent Liabilities - Additional Information (Detail) (USD $)	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Commitments and Contingencies Disclosure [Line Items]
Total rent expense	$407,000	$353,000	$291,000
Minimum
Commitments and Contingencies Disclosure [Line Items]
Operating lease, optional renewal period	1 year
Maximum
Commitments and Contingencies Disclosure [Line Items]
Operating lease, optional renewal period	10 years

Actual_Capital_Amounts_and_Rat

Actual Capital Amounts and Ratios (Detail) (USD $)	Dec. 31, 2014	Dec. 31, 2013
In Thousands, unless otherwise specified
Consolidated
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]
Total Capital to Risk Weighted Assets, Actual Amount	$145,653	$138,146
Total Capital to Risk Weighted Assets, Actual Ratio	12.99%	16.30%
Total Capital to Risk Weighted Assets, Minimum For Capital Adequacy Purposes Amount	89,718	67,806
Total Capital to Risk Weighted Assets, Minimum For Capital Adequacy Purposes Ratio	8.00%	8.00%
Tier 1 Capital to Risk Weighted Assets, Actual Amount	136,684	130,074
Tier 1 Capital to Risk Weighted Assets, Actual Ratio	12.19%	15.35%
Tier 1 Capital to Risk Weighted Assets, Minimum For Capital Adequacy Purposes Amount	44,859	33,903
Tier 1 Capital to Risk Weighted Assets, Minimum For Capital Adequacy Purposes Ratio	4.00%	4.00%
Tier 1 Capital to Average Assets, Actual Amount	136,684	130,074
Tier 1 Capital to Average Assets, Actual Ratio	10.05%	12.59%
Tier 1 Capital to Average Assets, Minimum For Capital Adequacy Purposes Amount	54,417	41,323
Tier 1 Capital to Average Assets, Minimum For Capital Adequacy Purposes Ratio	4.00%	4.00%
Belmont Savings Bank
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]
Total Capital to Risk Weighted Assets, Actual Amount	137,139	117,849
Total Capital to Risk Weighted Assets, Actual Ratio	12.23%	13.91%
Total Capital to Risk Weighted Assets, Minimum For Capital Adequacy Purposes Amount	89,673	67,782
Total Capital to Risk Weighted Assets, Minimum For Capital Adequacy Purposes Ratio	8.00%	8.00%
Total Capital to Risk Weighted Assets, Minimum To Be Well Capitalized Under Prompt Corrective Action Provisions Amount	112,092	84,728
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, Actual Amount	128,170	109,777
Tier 1 Capital to Risk Weighted Assets, Actual Ratio	11.43%	12.96%
Tier 1 Capital to Risk Weighted Assets, Minimum For Capital Adequacy Purposes Amount	44,837	33,891
Tier 1 Capital to Risk Weighted Assets, Minimum For Capital Adequacy Purposes Ratio	4.00%	4.00%
Tier 1 Capital to Risk Weighted Assets, Minimum To Be Well Capitalized Under Prompt Corrective Action Provisions Amount	67,255	50,837
Tier 1 Capital to Risk Weighted Assets, Minimum To Be Well Capitalized Under Prompt Corrective Action Provisions Ratio	6.00%	6.00%
Tier 1 Capital to Average Assets, Actual Amount	128,170	109,777
Tier 1 Capital to Average Assets, Actual Ratio	9.42%	10.62%
Tier 1 Capital to Average Assets, Minimum For Capital Adequacy Purposes Amount	54,403	41,334
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 Amount	$68,003	$51,668
Tier 1 Capital to Average Assets, Minimum To Be Well Capitalized Under Prompt Corrective Action Provisions Ratio	5.00%	5.00%

Recovered_Sheet4

Minimum Regulatory Capital Requirements - Additional Information (Detail) (USD $)	12 Months Ended		0 Months Ended
In Thousands, except Share data, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Jan. 01, 2019	Jan. 01, 2016
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]
Stock repurchase plan, number of shares repurchased	0	0
Stock repurchase, value		$6,478
Stock Repurchase Program, One
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]
Stock repurchase plan, number of shares repurchased		476,622
Stock repurchase, value		$6,478
Maximum
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]
Active stock repurchase plan to repurchase	500,000	500,000
Basel III
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]
Tier 1 capital to risk weighted assets	4.50%
Total capital to risk weighted assets	8.00%
Basel III | Subsequent Event
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]
Tier 1 capital conservation buffer to risk weighted assets			2.50%	0.63%
Basel III | Minimum
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]
Tier 1 capital to risk weighted assets	4.00%
Tier 1 leverage ratio	4.00%
Basel III | Maximum
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]
Tier 1 capital to risk weighted assets	6.00%

Employee_Benefit_Plans_Additio

Employee Benefit Plans - Additional Information (Detail) (USD $)	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2015
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Discount rate used to determine obligation	4.00%	5.00%
Projected rate of salary increase	3.00%	3.00%
Estimated prior service benefit to be amortized from accumulated other comprehensive loss	$63,000
Net periodic cost	304,000	263,000
Compensation expense recognized	1,800,000	1,400,000	1,300,000
Percentage of eligible compensation of employee	75.00%
Contributions by the Company	757,000	729,000	635,000
Percentage of deferred compensation vested	100.00%
Expense recognized by the company	61,000	113,000	92,000
Capital Appreciation Plan, Benefits paid	266,000
ESOP, purchase shares	458,643			458,643
Common stock price per share	$10
Loan obtained by the ESOP, payable annually over	30 years
Loan Obtained By ESOP Rate Per Annum Equal To Prime Rate	3.25%
Fair value of unallocated shares	7,600,000	6,400,000
Total compensation expense, Connection with ESOP	268,000	209,000	185,000
Minimum
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Fully vested participants, years of service to complete	5 years
Maximum
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Fully vested participants, years of service to complete	10 years
Scenario, Forecast
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Estimated net actuarial loss to be amortized from accumulated other comprehensive loss					-8,000
Estimated prior service benefit to be amortized from accumulated other comprehensive loss					6,000
Supplemental Employee Retirement Plans, Defined Benefit
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Net periodic cost	688,000	405,000	507,000
Deferred Compensation Plan
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Recorded liability	14,000	91,000
Deferred Compensation Plan | Rabbi Trust
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Recorded liability	2,300,000	2,200,000
Directors
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Estimated liability	648,000	553,000
Discount rate used to determine obligation	4.00%	5.00%
Executive Officers
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Benefit upon termination of employment at or after age	55
Reduced benefits available prior to attaining age	55
Estimated liability	$1,800,000	$1,500,000
Discount rate used to determine obligation	4.00%	5.00%
Projected rate of salary increase	3.00%	3.00%
Executive Officers | Minimum
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Number of years of service to complete	10 years
Executive Officers | Maximum
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Number of years of service to complete	10 years

Information_Pertaining_to_Acti

Information Pertaining to Activity in Plan (Detail) (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013
Defined Benefit Plan Disclosure [Line Items]
Benefit obligation at beginning of year	$729	$538
Service cost	258	242
Interest cost	40	21
Establish prior service cost base	63
Actuarial gain	-105	-72
Benefit obligation at end of year	985	729
Funded status at end of year	-985	-729
Accrued pension benefit	-1,069	-765
Accumulated benefit obligation	$857	$670

Assumption_used_to_Determine_B

Assumption used to Determine Benefit Obligation (Detail)	Dec. 31, 2014	Dec. 31, 2013
Defined Benefit Plan Disclosure [Line Items]
Discount rate	4.00%	5.00%
Rate of compensation increase	3.00%	3.00%

Components_of_Net_Periodic_Pen

Components of Net Periodic Pension Cost (Detail) (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013
Defined Benefit Plan Disclosure [Line Items]
Service cost	$258	$242
Interest cost	40	21
Amortization of prior service cost	6
Net periodic cost	$304	$263

Changes_in_Benefit_Obligations

Changes in Benefit Obligations Recognized in Other Comprehensive Income (Detail) (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013
Defined Benefit Plan Disclosure [Line Items]
Establish prior service cost base	$63
Amortization of prior service cost	-6
Net actuarial gain	-105	-72
Total recognized in other comprehensive income	($48)	($72)

Assumptions_Used_to_Determine_

Assumptions Used to Determine Net Periodic Pension Cost (Detail)	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Discount rate	5.00%	4.00%
Rate of compensation increase	3.00%	3.00%

Amounts_Recognized_in_Accumula

Amounts Recognized in Accumulated Other Comprehensive Loss, before Tax Effect (Detail) (USD $)	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013
Defined Benefit Plan Disclosure [Line Items]
Unrecognized prior service cost	$57
Unrecognized net gain	-141	-36
Total defined-benefit post-retirement benefit plans, Pre-Tax Amount	($84)	($36)

Estimated_Future_Benefit_Payme

Estimated Future Benefit Payments (Detail) (USD $)	Dec. 31, 2014
In Thousands, unless otherwise specified
Defined Benefit Plan Disclosure [Line Items]
2015	$0
2016	0
2017	101
2018	101
2019	101
Years 2020-2024	$1,298

Remaining_Principal_Balance_on

Remaining Principal Balance on Employee Stock Ownership Plan Debt (Detail) (Employee Stock Ownership Plan, USD $)	Dec. 31, 2014
In Thousands, unless otherwise specified
Employee Stock Ownership Plan
Employee Stock Ownership Plan (ESOP) Disclosures [Line Items]
2015	$102
2016	105
2017	109
2018	113
2019	116
Thereafter	3,730
Total	$4,275

Shares_Held_by_Employee_Stock_

Shares Held by Employee Stock Ownership Plan ESOP (Detail)	Dec. 31, 2014	Dec. 31, 2013
Employee Stock Ownership Plan (ESOP) Disclosures [Line Items]
Unallocated	408,955	424,271
Allocated	47,295	34,372
Total	456,250	458,643

Cumulatively_Granted_Stock_Opt

Cumulatively Granted Stock Options and Restricted Stock Awards Net of Forfeitures (Detail)	0 Months Ended			12 Months Ended
	Oct. 08, 2014	1-May-14	Jan. 08, 2014	Dec. 31, 2014
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Authorized Stock Awards				1,284,200
Stock Option Awards	10,414	10,000	23,760
Outstanding Total				1,249,610
Stock Options
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Authorized Stock Awards				917,286
Stock Option Awards				886,040
Restricted Stock
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Authorized Stock Awards				366,914
Restricted Stock Awards				363,570

PreTax_Expense_Associated_with

Pre-Tax Expense Associated with Stock Option and Restricted Stock Awards and Related Tax Benefits Recognized (Detail) (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Stock based compensation expense
Stock options	$847	$778
Restricted stock awards	906	869
Total stock based award expense	1,753	1,647	143
Related tax benefits recognized in earnings	$511	$481

Compensation_Cost_Related_to_N

Compensation Cost Related to Non-Vested Awards not Yet Recognized and Weighted Average Recognition Period (Detail) (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2014
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Total	$4,508
Stock Options
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock options, amount	2,195
Restricted stock, weighted average period	3 years
Restricted Stock
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Restricted stock, amount	$2,313
Restricted stock, weighted average period	2 years 10 months 24 days

Stock_Based_Compensation_Addit

Stock Based Compensation - Additional Information (Detail)	0 Months Ended			12 Months Ended
	Oct. 08, 2014	1-May-14	Jan. 08, 2014	Dec. 31, 2014	Dec. 31, 2013
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock Option Awards	10,414	10,000	23,760
Annualized estimated forfeitures, percentage				7.00%	7.00%

Fair_Value_of_Stock_Options_Gr

Fair Value of Stock Options Granted Estimate on Date of Grant Using Black-Scholes Option-Pricing Model (Detail) (USD $)	12 Months Ended
	Dec. 31, 2014
Date of grant 2014-08-01
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Date of grant	1-Aug-14
Exercise price	$15.26
Vesting period	5 years	[1]
Expiration date	1-Aug-14
Expected volatility	15.64%
Expected term	6 years 6 months
Expected dividend yield	0.00%
Risk free interest rate	2.27%
Fair value	$3.44
Date of grant 2014-05-01
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Date of grant	1-May-14
Exercise price	$17.43
Vesting period	5 years	[1]
Expiration date	1-May-14
Expected volatility	15.98%
Expected term	6 years 6 months
Expected dividend yield	0.00%
Risk free interest rate	2.07%
Fair value	$3.87
Date of grant 2014-10-08
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Date of grant	8-Oct-14
Exercise price	$18.31
Vesting period	5 years	[1]
Expiration date	8-Oct-14
Expected volatility	15.69%
Expected term	6 years 6 months
Expected dividend yield	0.00%
Risk free interest rate	1.91%
Fair value	$3.93
[1]	Vesting period begins on the date of grant

Summary_of_Stock_Option_and_Re

Summary of Stock Option and Restricted Stock Grants (Detail) (USD $)	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013
Non-vested restricted stock awards
Non-vested Stock option awards, Beginning balance	162,370
Stock option awards, exercised	-23,076
Stock option awards, vested	144,248
Forfeited	-917
Balance at December 31, 2014	282,625	162,370
Weighted Average Exercise Price
Weighted average exercise price, Beginning Balance	$12.04
Weighted average exercise price, Granted	$0
Weighted average exercise price, exercised	$12.16
Weighted average exercise price, Vested	$12.12
Weighted average exercise price, Forfeited	$12.04
Weighted average exercise price, Ending balance	$12.08	$12.04
Weighted average remaining contractual term
Weighted average remaining contractual term, Forfeited	7 years 11 months 1 day
Weighted average remaining contractual term, Ending balance	8 years 5 months 1 day	8 years 10 months 28 days
Weighted average remaining contractual term, exercised	7 years 11 months 19 days
Weighted average remaining contractual term, Vested	7 years 11 months 12 days
Weighted remaining contractual term, Ending balance	8 years 5 months 1 day	8 years 10 months 28 days
Non-vested restricted stock awards
Non-vested restricted stock awards, Beginning balance	287,648
Granted	4,000
Non-vested restricted stock awards, Vested	-74,554
Non-vested restricted stock awards, Ending balance	217,094	287,648
Nonvested Stock Option
Non-vested restricted stock awards
Non-vested Stock option awards, Beginning balance	690,663
Non-vested Stock option awards, Granted	44,174
Stock option awards, vested	-144,248
Forfeited	-10,250
Balance at December 31, 2014	580,339
Weighted average grant date fair value
Weighted average grant date fair value, Beginning balance	$4.71
Weighted average grant date fair value, Granted	$3.65
Weighted average grant date fair value, exercised	$0
Weighted average grant date fair value, vested	$4.71
Weighted average grant date fair value, Forfeited	$3.93
Weighted average grant date fair value, Ending balance	$4.65
Weighted average remaining contractual term
Weighted average remaining contractual term, Beginning balance	8 years 11 months 12 days
Weighted average remaining contractual term, Granted	9 years 3 months 11 days
Weighted average remaining contractual term, exercised	0 years
Weighted average remaining contractual term, Vested	7 years 11 months 12 days
Weighted average remaining contractual term, Forfeited	9 years 9 months 11 days
Weighted average remaining contractual term, Ending balance	8 years 9 months 22 days
Weighted remaining contractual term, Ending balance	8 years 9 months 22 days

Earning_Per_Share_Detail

Earning Per Share (Detail) (USD $)	12 Months Ended
In Thousands, except Share data, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Computation Of Earnings Per Share Line Items
Net income	$4,291	$1,960	$1,401
Undistributed earnings attributable to participating securities	-139	-79	-5
Net income available to common stockholders	$4,152	$1,881	$1,396
Weighted average shares outstanding, basic	8,361,880	8,419,437	8,727,615
Effect of dilutive shares	91,547
Weighted average shares outstanding, assuming dilution	8,453,427	8,419,437	8,727,615
Basic EPS	$0.50	$0.22	$0.16
Effect of dilutive shares	($0.01)
Diluted EPS	$0.49	$0.22	$0.16

Earnings_Per_Share_Additional_

Earnings Per Share - Additional information (Detail)	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Computation Of Earnings Per Share Line Items
Antidilutive securities excluded from computation of earnings per share	19,368	850,180	79,446

Recovered_Sheet5

Restrictions on Dividends Loans and Advances - Additional Information (Detail)	Dec. 31, 2014
Restrictions on Dividends, Loans and Advances [Line Items]
Loans or advances as a percentage of capital stock and surplus	10.00%

Summary_of_Financial_Assets_Me

Summary of Financial Assets Measured at Fair Value on Recurring Basis (Detail) (USD $)	Dec. 31, 2014	Dec. 31, 2013
In Thousands, unless otherwise specified
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Totals	$24,415	$24,155
Corporate debt securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities available-for-sale	22,079	21,921
Rabbi Trust
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Trading securities	2,336	2,234
Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Totals	2,336	2,181
Level 1 | Rabbi Trust
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Trading securities	2,336	2,181
Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Totals	22,079	21,974
Level 2 | Corporate debt securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities available-for-sale	22,079	21,921
Level 2 | Rabbi Trust
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Trading securities		$53

Loans_Remeasured_and_Reported_

Loans Remeasured and Reported at Fair Value (Detail) (Fair Value, Measurements, Nonrecurring, Level 3, USD $)	Dec. 31, 2014	Dec. 31, 2013
In Thousands, unless otherwise specified
Fair Value, Measurements, Nonrecurring | Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Impaired loans	$1,951	$3,199
Totals	$1,951	$3,199

Assets_Remeasured_and_Reported

Assets Remeasured and Reported at Lower of Cost or Fair Value (Detail) (Level 3, USD $)	Dec. 31, 2014	Dec. 31, 2013
In Thousands, unless otherwise specified
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets measured at fair value on a nonrecurring basis	$476	$411
Mortgage Servicing Rights
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets measured at fair value on a nonrecurring basis	$476	$411

Fair_Value_Measurements_Detail

Fair Value Measurements (Detail) (USD $)	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Fair Value, Assets and Liabilities Measured on Nonrecurring Basis [Line Items]
Cash and cash equivalents	$51,767,000	$38,042,000	$52,712,000	$22,795,000
Interest-bearing time deposits with other banks	49,492,000	35,839,000
Held-to-maturity securities	118,528,000	119,776,000
Federal Home Loan Bank stock	13,712,000	7,712,000
Loans, net	1,179,399,000	839,013,000
Accrued interest receivable	2,977,000	2,241,000
Deposits	984,562,000	764,753,000
Federal Home Loan Bank advances	285,100,000	142,100,000
Securities sold under agreements to repurchase	1,392,000	2,127,000
Other borrowed funds	1,067,000	1,113,000
Accrued interest payable	961,000	683,000
Mortgagor's escrow accounts	9,707,000	8,107,000
Cash and cash equivalents	51,767,000	38,042,000
Interest-bearing time deposits with other banks	132,000	119,000
Held-to-maturity securities	119,447,000	118,981,000
Federal Home Loan Bank stock	13,712,000	7,712,000
Loans, net	1,170,663,000	833,423,000
Accrued interest receivable	2,977,000	2,241,000
Deposits	987,353,000	767,494,000
Federal Home Loan Bank advances	285,266,000	141,960,000
Securities sold under agreements to repurchase	1,392,000	2,127,000
Other borrowed funds	1,056,000	1,113,000
Accrued interest payable	961,000	683,000
Mortgagor's escrow accounts	1,726,000	1,054,000
Carrying Amount
Fair Value, Assets and Liabilities Measured on Nonrecurring Basis [Line Items]
Cash and cash equivalents	51,767,000	38,042,000
Interest-bearing time deposits with other banks	131,000	119,000
Held-to-maturity securities	118,528,000	119,776,000
Federal Home Loan Bank stock	13,712,000	7,712,000
Loans, net	1,179,399,000	839,013,000
Accrued interest receivable	2,977,000	2,241,000
Deposits	984,562,000	764,753,000
Federal Home Loan Bank advances	285,100,000	142,100,000
Securities sold under agreements to repurchase	1,392,000	2,127,000
Other borrowed funds	1,067,000	1,113,000
Accrued interest payable	961,000	683,000
Mortgagor's escrow accounts	1,726,000	1,054,000
Level 1
Fair Value, Assets and Liabilities Measured on Nonrecurring Basis [Line Items]
Cash and cash equivalents	51,767,000	38,042,000
Accrued interest receivable	2,977,000	2,241,000
Deposits	758,349,000	618,570,000
Accrued interest payable	961,000	683,000
Level 2
Fair Value, Assets and Liabilities Measured on Nonrecurring Basis [Line Items]
Interest-bearing time deposits with other banks	132,000	119,000
Held-to-maturity securities	119,447,000	118,981,000
Federal Home Loan Bank stock	13,712,000	7,712,000
Deposits	229,004,000	148,924,000
Federal Home Loan Bank advances	285,266,000	141,960,000
Securities sold under agreements to repurchase	1,392,000	2,127,000
Other borrowed funds	1,056,000	1,113,000
Mortgagor's escrow accounts	1,726,000	1,054,000
Level 3
Fair Value, Assets and Liabilities Measured on Nonrecurring Basis [Line Items]
Loans, net	$1,170,663,000	$833,423,000

Other_Comprehensive_Income_Det

Other Comprehensive Income (Detail) (USD $)	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013		Dec. 31, 2012
Schedule of Other Comprehensive Income (Loss) [Line Items]
Change in unrealized gain/loss during the period, Pre-Tax Amount	$230,000	($454,000)		$138,000
Reclassification adjustment for net (gains) losses included in net income		-34,000
Total defined-benefit post-retirement benefit plans, Pre-Tax Amount	84	36
Total other comprehensive income, Pre-Tax Amount	278,000	-416,000		110,000
Total other comprehensive income, Tax (Expense) Benefit	112,000	-160,000		37,000
Total defined-benefit post-retirement benefit plans, After Tax Amount	48,000	72,000
Other comprehensive income (loss), net of tax	166,000	-256,000		73,000
After Tax
Schedule of Other Comprehensive Income (Loss) [Line Items]
Change in unrealized gain/loss during the period, After Tax Amount	138,000	-281,000		91,000
Reclassification adjustment for net (gains) losses included in net income, After Tax Amount		-20,000	[1]
Total securities available for sale, After Tax Amount	138,000	-301,000		91,000
Change in unrecognized pension plan benefit, After Tax Amount	28,000
Change in the net actuarial gain/loss, After Tax Amount		45,000		-18,000
Total defined-benefit post-retirement benefit plans, After Tax Amount	28,000	45,000		-18,000
Other comprehensive income (loss), net of tax	166,000	-256,000		73,000
Income Tax Benefit
Schedule of Other Comprehensive Income (Loss) [Line Items]
Change in unrealized gain/loss during the period, Tax (Expense) Benefit	-92,000	173,000		-47,000
Reclassification adjustment for net (gains) losses included in net income, Tax (Expense) Benefit		14,000	[1]
Total securities available for sale, Tax (Expense) Benefit	-92,000	187,000		-47,000
Change in unrecognized pension plan benefit, Tax (Expense) Benefit	-20,000
Change in the net actuarial gain/loss, Tax (Expense) Benefit		-27,000		10,000
Total defined-benefit post-retirement benefit plans, Tax (Expense) Benefit	-20,000	-27,000		10,000
Total other comprehensive income, Tax (Expense) Benefit	-112,000	160,000		-37,000
Pre Tax
Schedule of Other Comprehensive Income (Loss) [Line Items]
Change in unrealized gain/loss during the period, Pre-Tax Amount	230,000	-454,000		138,000
Reclassification adjustment for net (gains) losses included in net income		-34,000	[1]
Total securities available for sale, Pre-Tax Amount	230,000	-488,000		138,000
Change in unrecognized pension plan benefit, Pre-Tax Amount	48,000
Change in the net actuarial gain/loss, Pre-Tax Amount		72,000		-28,000
Total defined-benefit post-retirement benefit plans, Pre-Tax Amount	48,000	72,000		-28,000
Total other comprehensive income, Pre-Tax Amount	$278,000	($416,000)		$110,000
[1]	Reclassification adjustments are comprised of realized security gains and losses. The gains and losses have been reclassified out of accumulated other comprehensive loss and have affected certain lines in the consolidated statements of operations as follows; the pre-tax amount is included in net gain on sales and calls of securities, the tax expense amount is included in income tax expense and the after tax amount is included in net income.

Components_of_Accumulated_Othe

Components of Accumulated Other Comprehensive Income (loss) included in Stockholders' Equity (Detail) (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013
Accumulated Other Comprehensive Income (Loss) [Line Items]
Accumulated other comprehensive loss	($22)	($188)
Accumulated Other Comprehensive (Loss) Income
Accumulated Other Comprehensive Income (Loss) [Line Items]
Net unrealized holding loss on available-for-sale securities, net of tax	-72	-210
Unrecognized benefit pertaining to defined benefit plan, net of tax	50	22
Accumulated other comprehensive loss	($22)	($188)

Condensed_Balance_Sheets_of_Pa

Condensed Balance Sheets of Parent Company (Detail) (USD $)	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
ASSETS
Cash and cash equivalents held at Belmont Savings Bank	$51,767,000	$38,042,000	$52,712,000	$22,795,000
Investments	118,528,000	119,776,000
Deferred tax asset	7,310,000	6,795,000
Other assets	4,040,000	3,997,000
Total assets	1,425,550,000	1,054,619,000
LIABILITIES AND STOCKHOLDERS' EQUITY
Other liabilities	9,707,000	8,107,000
Total liabilities	1,288,540,000	924,198,000
Stockholders' equity	137,010,000	130,421,000	133,308,000	131,506,000
Total liabilities and stockholders' equity	1,425,550,000	1,054,619,000
Parent Company
ASSETS
Cash and cash equivalents held at Belmont Savings Bank	2,754,000	14,967,000	41,624,000	41,850,000
Deferred tax asset	190,000	500,000
Other assets	761,000	336,000
Total assets	137,067,000	130,476,000
LIABILITIES AND STOCKHOLDERS' EQUITY
Accrued expenses	41,000	55,000
Other liabilities	16,000
Total liabilities	57,000	55,000
Stockholders' equity	137,010,000	130,421,000
Total liabilities and stockholders' equity	137,067,000	130,476,000
Parent Company | Belmont Savings Bank
ASSETS
Investments	128,495,000	109,890,000
Parent Company | Belmont Savings Bank Funding Corporation
ASSETS
Investments	$4,867,000	$4,783,000

Condensed_Statements_of_Operat

Condensed Statements of Operations of Parent Company (Detail) (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Interest and dividend income:
Interest on cash equivalents	$35,296	$28,407	$24,568
Dividends from subsidiaries	143	28	47
Total interest and dividend income	38,655	30,972	26,824
Interest expense:	7,051	4,987	5,133
Net interest and dividend income	31,604	25,985	21,691
Non-interest income	3,291	3,606	4,705
Non-interest expense	26,490	25,091	21,546
Income tax (benefit) provision	2,562	1,042	713
Net income	4,291	1,960	1,401
Parent Company
Interest and dividend income:
Interest on cash equivalents	11	27	42
Dividends from subsidiaries	0	0	0
Total interest and dividend income	11	27	42
Interest expense:	0	0	0
Net interest and dividend income	11	27	42
Non-interest income	0	0	0
Non-interest expense	269	248	303
Loss before income taxes and equity in undistributed earnings of subsidiaries	-258	-221	-261
Income tax (benefit) provision	-156	-268	-105
(Loss) income before equity in income of subsidiaries	-102	47	-156
Net income	4,291	1,960	1,401
Parent Company | Belmont Savings Bank
Interest and dividend income:
Equity in undistributed income	4,308	1,826	1,469
Parent Company | Belmont Savings Bank Funding Corporation
Interest and dividend income:
Equity in undistributed income	$85	$87	$88

Condensed_Statement_of_Cash_Fl

Condensed Statement of Cash Flows of Parent Company (Detail) (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Cash flows from operating activities:
Net income	$4,291	$1,960	$1,401
Adjustments to reconcile net income to net cash used in operating activities:
Deferred income tax expense	-608	-961	253
Cash flows from investing activities:
Net cash used in investing activities	-369,922	-240,238	-174,664
Cash flows from financing activities:
Repurchase of common stock		-6,478
Proceeds from exercise of stock options, net of cash paid	45
Restricted stock awards issued, net of awards surrendered	43
Net increase (decrease) in cash and cash equivalents	13,725	-14,670	29,917
Cash and cash equivalents at beginning of period	38,042	52,712	22,795
Cash and cash equivalents at end of period	51,767	38,042	52,712
Parent Company
Cash flows from operating activities:
Net income	4,291	1,960	1,401
Adjustments to reconcile net income to net cash used in operating activities:
Deferred income tax expense	363	193	52
Change in deferred tax valuation allowance	-53	-180
Other, net	-423	-239	-122
Net cash used in operating activities	-215	-179	-226
Cash flows from investing activities:
Net cash used in investing activities	-12,000	-20,000
Cash flows from financing activities:
Repurchase of common stock		-6,478
Proceeds from exercise of stock options, net of cash paid	45
Restricted stock awards issued, net of awards surrendered	-43
Net cash provided by (used in) financing activities	2	-6,478
Net increase (decrease) in cash and cash equivalents	-12,213	-26,657	-226
Cash and cash equivalents at beginning of period	14,967	41,624	41,850
Cash and cash equivalents at end of period	2,754	14,967	41,624
Parent Company | Belmont Savings Bank
Adjustments to reconcile net income to net cash used in operating activities:
Equity in undistributed earnings	-4,308	-1,826	-1,469
Cash flows from investing activities:
Investments	-12,000	-20,000
Parent Company | Belmont Savings Bank Funding Corporation
Adjustments to reconcile net income to net cash used in operating activities:
Equity in undistributed earnings	($85)	($87)	($88)

Quarterly_Results_of_Operation

Quarterly Results of Operations (Detail) (USD $)	12 Months Ended			3 Months Ended
In Thousands, except Per Share data, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013
Quarterly Financial Information [Line Items]
Interest and dividend income	$38,655	$30,972	$26,824
Interest expense	7,051	4,987	5,133
Net interest income	31,604	25,985	21,691
Provision for loan losses	1,552	1,498	2,736
Net interest income, after provision for loan losses	30,052	24,487	18,955
Non-interest income	3,291	3,606	4,705
Non-interest expense	26,490	25,091	21,546
Income before taxes	6,853	3,002	2,114
Income tax expense	2,562	1,042	713
Net income	4,291	1,960	1,401
Earnings per common share
Basic	$0.50	$0.22	$0.16
Diluted	$0.49	$0.22	$0.16
Parent
Quarterly Financial Information [Line Items]
Interest and dividend income				10,600	10,036	9,268	8,751	8,875	7,995	7,136	7,005
Interest expense				2,068	1,896	1,659	1,428	1,316	1,223	1,222	1,226
Net interest income				8,532	8,140	7,609	7,323	7,559	6,772	5,914	5,779
Provision for loan losses				565	292	307	388	632	438	100	327
Net interest income, after provision for loan losses				7,967	7,848	7,302	6,935	6,927	6,334	5,814	5,452
Non-interest income				920	792	857	722	802	890	908	1,006
Non-interest expense				6,657	6,656	6,504	6,673	6,797	6,373	6,161	5,800
Income before taxes				2,230	1,984	1,655	984	932	851	561	658
Income tax expense				862	782	614	304	287	313	200	242
Net income				$1,368	$1,202	$1,041	$680	$645	$538	$361	$416
Earnings per common share
Basic				$0.16	$0.14	$0.12	$0.08	$0.07	$0.06	$0.04	$0.05
Diluted				$0.16	$0.14	$0.12	$0.08	$0.07	$0.06	$0.04	$0.05