Pilgrim Bancshares (PLRM) 10-K 25 Mar 15 2014 FY Annual report Financial data

Document_and_Entity_Informatio

Document and Entity Information (USD $)	12 Months Ended
In Millions, except Share data, unless otherwise specified	Dec. 31, 2014	Mar. 20, 2015	Oct. 13, 2014
Document And Entity Information [Abstract]
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	PLRM
Entity Registrant Name	Pilgrim Bancshares, Inc.
Entity Central Index Key	1601347
Current Fiscal Year End Date	-19
Entity Well-known Seasoned Issuer	No
Entity Current Reporting Status	Yes
Entity Voluntary Filers	No
Entity Filer Category	Smaller Reporting Company
Entity Common Stock, Shares Outstanding		2,247,589
Entity Public Float			$25.10

Consolidated_Balance_Sheets

Consolidated Balance Sheets (USD $)	Dec. 31, 2014	Dec. 31, 2013
In Thousands, unless otherwise specified
ASSETS
Cash and due from banks	$1,938	$1,671
Interest-bearing demand deposits with other banks	16,357	7,320
Total cash and cash equivalents	18,295	8,991
Interest-bearing time deposits with other banks	2,575	4,511
Investments in available-for-sale securities (at fair value)	11,767	13,496
Investments in held-to-maturity securities (fair value of $196 at December 31, 2014, and $284 at December 31, 2013)	149	254
Federal Home Loan Bank stock, at cost	694	667
Investment in The Co-operative Central Reserve Fund, at cost	384	384
Loans, net of allowance for loan losses of $743 at December 31, 2014, and $742 at December 31, 2013	143,774	132,923
Premises and equipment, net	5,409	5,571
Investment in real estate, net	1,623	1,662
Accrued interest receivable	447	399
Deferred income tax asset, net	410	365
Bank-owned life insurance	2,230	2,181
Other assets	278	152
Total assets	188,035	171,556
Deposits:
Noninterest-bearing	13,978	12,023
Interest-bearing	137,032	141,709
Total deposits	151,010	153,732
Federal Home Loan Bank advances	5,000	5,000
Other liabilities	423	320
Total liabilities	156,433	159,052
Stockholders' equity:
Common stock $.01 par value per share: 10,000,000 shares authorized, 2,247,589 shares issued at December 31, 2014; none issued at December 31, 2013	22
Additional paid-in capital	20,770
Retained earnings	12,599	12,718
Unearned compensation - ESOP (173,813 shares unallocated at December 31, 2014)	-1,738
Accumulated other comprehensive loss	-51	-214
Total stockholders' equity	31,602	12,504
Total liabilities and stockholders' equity	$188,035	$171,556

Consolidated_Balance_Sheets_Pa

Consolidated Balance Sheets (Parenthetical) (USD $)	Dec. 31, 2014	Dec. 31, 2013
In Thousands, except Share data, unless otherwise specified
Statement of Financial Position [Abstract]
Securities held-to-maturity, fair value	$196	$284
Allowance for loan losses	$743	$742
Common stock, par value	$0.01	$0.01
Common stock, shares authorized	10,000,000	10,000,000
Common stock, shares issued	2,247,589	0
Employee stock ownership plan, shares unallocated	173,813

Consolidated_Statements_of_Los

Consolidated Statements of (Loss) Income (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013
Interest and dividend income:
Interest and fees on loans	$5,683	$5,600
Interest on debt securities:
Taxable	177	196
Tax-exempt	73	90
Other interest and dividends	60	77
Total interest and dividend income	5,993	5,963
Interest expense:
Interest on deposits	1,023	1,110
Interest on Federal Home Loan Bank advances	43	65
Total interest expense	1,066	1,175
Net interest and dividend income	4,927	4,788
Provision for loan losses	0	0
Net interest and dividend income after provision for loan losses	4,927	4,788
Noninterest income:
Service charges on deposit accounts	119	138
Net gain on sales and calls of securities	70	5
Writedown of securities (includes losses of $12 and $255, net of $0 and $8 recognized in other comprehensive income for the years ended December 31, 2014 and 2013, respectively, before taxes)	-12	-247
Gain on sales of loans, net	49
Rental income	262	204
Other income	127	251
Total noninterest income	615	351
Noninterest expense:
Salaries and employee benefits	2,817	2,627
Occupancy expense	479	459
Equipment expense	170	160
Data processing expense	380	359
Professional fees	311	260
FDIC assessment	129	233
Communications expense	118	95
Advertising and public relations expense	93	75
Insurance expense	73	65
Supplies expense	64	52
Contribution to Pilgrim Bank Foundation	725
Other expense	236	226
Total noninterest expense	5,595	4,611
(Loss) income before income taxes	-53	528
Income tax expense	66	160
Net (loss) income	($119)	$368

Consolidated_Statements_of_Los1

Consolidated Statements of (Loss) Income (Parenthetical) (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013
Income Statement [Abstract]
Losses recognized in other comprehensive income, before taxes	$12	$255
Losses recognized in other comprehensive income, net of taxes	$0	$8

Consolidated_Statements_of_Com

Consolidated Statements of Comprehensive Income (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013
Statement of Comprehensive Income [Abstract]
Net (loss) income	($119)	$368
Other comprehensive income (loss), net of tax:
Net unrealized holding gain (loss) on available-for-sale securities	330	-593
Reclassification adjustment for net realized (gains) losses in net income	-71	219
Other comprehensive income (loss) before income tax effect	259	-374
Income tax (expense) benefit	-96	136
Other comprehensive income (loss), net of tax	163	-238
Comprehensive income	$44	$130

Consolidated_Statements_of_Cha

Consolidated Statements of Changes In Stockholders' Equity (USD $)	Total	Pilgrim Bank Foundation [Member]	Common Stock [Member]	Common Stock [Member]	Additional Paid-in Capital [Member]	Additional Paid-in Capital [Member]	Retained Earnings [Member]	Unearned Compensation - ESOP [Member]	Accumulated Other Comprehensive Income (Loss) [Member]
In Thousands, except Share data				Pilgrim Bank Foundation [Member]		Pilgrim Bank Foundation [Member]
Beginning Balance at Dec. 31, 2012	$12,374						$12,350		$24
Net income	368						368
Other comprehensive income (loss), net of tax effect	-238								-238
Ending Balance at Dec. 31, 2013	12,504						12,718		-214
Net income	-119						-119
Proceeds from issuance of common stock for initial public offering, net of offering costs of $1,685	20,136		21		20,115
Proceeds from issuance of common stock for initial public offering, net of offering costs of $1,685, Shares			2,182,125
Issuance of common stock to Pilgrim Bank Foundation		655		1		654
Issuance of common stock to Pilgrim Bank Foundation, Shares				65,464
Common stock acquired by ESOP (179,807 shares)	-1,798							-1,798
Common stock held by ESOP committed to be allocated (5,994 shares)	61				1			60
Other comprehensive income (loss), net of tax effect	163								163
Ending Balance at Dec. 31, 2014	$31,602		$22		$20,770		$12,599	($1,738)	($51)
Ending Balance , Shares at Dec. 31, 2014			2,247,589

Consolidated_Statements_of_Cha1

Consolidated Statements of Changes In Stockholders' Equity (Parenthetical) (USD $)	12 Months Ended
In Thousands, except Share data, unless otherwise specified	Dec. 31, 2014
Initial public offering, net of offering costs	$1,685
Common Stock [Member]
Number of shares provided to the employee stock ownership plan	179,807
Number of shares committed to be allocated	5,994

Consolidated_Statements_of_Cas

Consolidated Statements of Cash Flows (USD $)	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013
Cash flows from operating activities:
Net (loss) income	($119,000)	$368,000
Adjustments to reconcile net (loss) income to net cash provided by operating activities:
Capitalized interest - interest-bearing time deposits	-6,000	-19,000
Amortization of securities, net	92,000	120,000
Net gain on sales and calls of securities	-70,000	-5,000
Loans originated for sale	-2,039,000
Proceeds from sales of loans originated for sale	2,088,000
Gain on sales of loans	-49,000
Writedown of securities	12,000	247,000
Change in deferred origination fees, costs and discounts, excluding purchase discounts	-13,000	-297,000
Loss on sale of other real estate owned		-121,000
Writedown of other real estate owned		229,000
Depreciation and amortization	335,000	312,000
Contribution of common stock to Pilgrim Bank Foundation	655,000
(Increase) decrease in accrued interest receivable	-48,000	25,000
Increase in other assets	-56,000	-8,000
(Increase) decrease in prepaid expenses	-37,000	183,000
(Increase) decrease in income taxes receivable	-33,000	177,000
Deferred tax benefit	-141,000	-73,000
Increase in bank-owned life insurance	-49,000	-52,000
Stock based compensation expense	61,000
Increase in other liabilities	6,000	43,000
Increase in accrued expenses	97,000	70,000
Net cash provided by operating activities	686,000	1,199,000
Cash flows from investing activities:
Proceeds from redemption and maturities of interest-bearing time deposits	1,942,000	6,238,000
Purchase of Federal Home Loan Bank stock	-169,000	-27,000
Redemption of Federal Home Loan Bank stock	142,000	117,000
Purchases of available-for-sale securities	-3,258,000	-3,897,000
Proceeds from maturities of available-for-sale securities	1,905,000	1,814,000
Proceeds from sales of available-for-sale securities	3,312,000	3,569,000
Principal payments received on held-to-maturity securities	56,000	142,000
Proceeds from maturities of held-to-maturity securities	44,000
Loan principal collections and originations, net	6,000	-9,761,000
Loans purchased	-10,845,000	-11,037,000
Recoveries on loans previously charged off	1,000	5,000
Capital expenditures	-134,000	-206,000
Proceeds from the sale of other real estate owned		922,000
Net cash used by investing activities	-6,998,000	-12,121,000
Cash flows from financing activities:
Net (decrease) increase in demand deposits, NOW and savings accounts	-4,733,000	2,375,000
Net increase (decrease) in time deposits	2,011,000	-5,296,000
Payments on Federal Home Loan Bank long-term advances	-1,500,000	-807,000
Net change in short-term Federal Home Loan Bank advances	1,500,000	2,500,000
Proceeds from issuance of common stock	21,821,000
Costs of issuance of common stock	-1,685,000
Common stock acquired by ESOP	-1,798,000
Net cash provided by (used in) financing activities	15,616,000	-1,228,000
Net increase (decrease) in cash and cash equivalents	9,304,000	-12,150,000
Cash and cash equivalents at beginning of period	8,991,000	21,141,000
Cash and cash equivalents at end of period	18,295,000	8,991,000
Supplemental disclosures:
Interest paid	1,069,000	1,175,000
Income taxes paid	240,000	56,000
Transfer from loans to other real estate owned		$785,000

Nature_of_Operations

Nature of Operations	12 Months Ended
	Dec. 31, 2014
Accounting Policies [Abstract]
Nature of Operations	NOTE 1 - NATURE OF OPERATIONS
	Pilgrim Bank is a state-chartered stock bank which was incorporated in 1916 and is headquartered in Cohasset, Massachusetts. The Bank operates its business from three banking offices located in 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, and in commercial, consumer and small business loans.
	On October 10, 2014, in accordance with a Plan of Conversion (the “Conversion”), Conahasset Bancshares, MHC, the Bank’s former mutual holding company, completed a mutual-to-stock conversion pursuant to which the Bank became a wholly owned subsidiary of Pilgrim Bancshares, Inc., (the “Company”) a stock holding company incorporated in February 2014. In connection with the conversion, the Company sold 2,182,125 shares of common stock, at an offering price of $10 per share, and issued an additional 65,464 shares of its common stock to the Pilgrim Bank Foundation, resulting in an aggregate issuance of 2,247,589 shares of common stock. The net proceeds from the stock offering, net of offering costs of $1,685,000, amounted to $20,136,000. The Company’s stock began trading on October 13, 2014 under the symbol PLRM on the OTC Pink Marketplace operated by OTC Market Group.
	As set forth above, in connection with the Conversion, the Company established and funded the Pilgrim Bank Foundation (the “Foundation”) with 65,464 shares of the Company’s common stock, plus a cash contribution of $70,360. This contribution resulted in recognition of expense of $725,000 in the year ended December 31, 2014 based on the $10 per share offering price, plus $70,360 of cash. The Foundation supports charitable causes and community development activities in the Bank’s area of operations.
	Also, in connection with the Conversion, the Company established an employee stock ownership plan (ESOP), which purchased 179,807 shares of the Company’s common stock at a price of $10 per share.
	At the time of conversion, the Company substantially restricted retained earnings by establishing a liquidation account and the Bank established a parallel liquidation account. The liquidation accounts will be maintained for the benefit of eligible account holders who continue to maintain their accounts at the Bank after conversion. The liquidation accounts will be reduced annually to the extent that eligible account holders have reduced their qualifying deposits. Subsequent increases will not restore an eligible account holder’s interest in the liquidation accounts. In the event of a complete liquidation of the Bank or the Bank and the Company, and only in such event, each account holder will be entitled to receive a distribution from the liquidation accounts in an amount proportionate to the adjusted qualifying account balances then held. The Company and the Bank may not pay dividends if those dividends would cause regulatory capital to be reduced below applicable capital requirements or the amount required to maintain its respective liquidation account amount. The conversion will be accounted for as a change in corporate form with the historic basis of the Company’s and the Bank’s assets, liabilities and equity unchanged as a result.

Accounting_Policies

Accounting Policies	12 Months Ended
	Dec. 31, 2014
Accounting Policies [Abstract]
Accounting Policies	NOTE 2 - ACCOUNTING POLICIES
	The accounting and reporting policies of the Company and its subsidiary conform to accounting principles generally accepted in the United States of America and predominant practices within the banking industry. The consolidated financial statements were prepared using the accrual basis of accounting. The significant accounting policies are summarized below to assist the reader in better understanding the consolidated financial statements and other data contained herein.
	USE OF ESTIMATES:
	In preparing consolidated financial statements in conformity with accounting principles generally accepted in the United States of America, management is required to make estimates and assumptions that affect the reported amounts of assets and liabilities as of the date of the consolidated balance sheets 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 change in the near term relate to the determination of the allowance for loan losses, impairment of securities and the valuation of deferred tax assets.
	BASIS OF PRESENTATION:
	The consolidated financial statements include the accounts of the Company and its wholly-owned subsidiary, the Bank, and the Bank’s wholly-owned subsidiaries, 48 South Main Street Corporation, which was formed to hold securities for its own account; 40 South Main Street Realty Trust, which was formed to hold our main office, and 800 CJC Realty Corporation, which was formed to invest in and develop residential and commercial property. All significant intercompany accounts and transactions have been eliminated in consolidation.
	CASH AND CASH EQUIVALENTS:
	For purposes of reporting cash flows, cash and cash equivalents include cash on hand, cash items, due from banks and interest-bearing demand deposits with other banks.
	The Bank is required to maintain average balances on hand with the Federal Reserve Bank. At December 31, 2014, the reserve balance amounted to $753,000.
	SECURITIES:
	Investments in debt securities are adjusted for amortization of premiums and accretion of discounts so as to approximate the interest method. Gains or losses on sales of investment securities are computed on a specific identification basis.
	The Company classifies debt and equity securities into one of three categories: held-to-maturity, available-for-sale, or trading. These security classifications may be modified after acquisition only under certain specified conditions. In general, securities may be classified as held-to-maturity only if the Company has the positive intent and ability to hold them to maturity. Trading securities are defined as those bought and held principally for the purpose of selling them in the near term. All other securities must be classified as available-for-sale.
		•		Held-to-maturity securities are measured at amortized cost in the consolidated balance sheets. Unrealized holding gains and losses are not included in earnings or in a separate component of stockholders’ equity. They are merely disclosed in the notes to the consolidated financial statements.
		•		Available-for-sale securities are carried at fair value on the consolidated balance sheets. Unrealized holding gains and losses are not included in earnings, but are reported as a net amount (less expected tax) in a separate component of stockholders’ equity until realized.
		•		Trading securities are carried at fair value on the consolidated balance sheets. Unrealized holding gains and losses for trading securities are included in earnings.
	For any debt security with a fair value less than its amortized cost basis, the Company will determine whether it has the intent to sell the debt security or whether it is more likely than not it will be required to sell the debt security before the recovery of its amortized cost basis. If either condition is met, the Company will recognize a full impairment charge to earnings. For all other debt securities that are considered other-than-temporarily impaired and do not meet either condition, the credit loss portion of impairment will be recognized in earnings as realized losses. The other-than-temporary impairment related to all other factors will be recorded in other comprehensive income.
	Declines in marketable equity securities below their cost that are deemed other than temporary are reflected in earnings as realized losses.
	As a member of the Federal Home Loan Bank of Boston (FHLB), the Company is required to invest in $100 par value stock of the FHLB. The FHLB capital structure mandates that members must own stock as determined by their Total Stock Investment Requirement which is the sum of a member’s Membership Stock Investment Requirement and Activity-Based Stock Investment Requirement. The Membership Stock Investment Requirement is calculated as 0.35% of a member’s Stock Investment Base, subject to a minimum investment of $10,000 and a maximum investment of $25,000,000. The Stock Investment Base is an amount calculated based on certain assets held by a member that are reflected on call reports submitted to applicable regulatory authorities. The Activity-Based Stock Investment Requirement is calculated as 3.0% for overnight advances, 4.0% for FHLB advances with original terms to maturity of two days to three months and 4.5% for other advances plus a percentage of advance commitments, and 0.25% of standby letters of credit issued by the FHLB. Management evaluates the Company’s investment in FHLB 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 as of December 31, 2014, management deems its investment in FHLB stock to be not other-than-temporarily impaired.
	LOANS:
	Loans receivable that management has the intent and ability to hold until maturity or payoff are reported at their outstanding principal balances adjusted for amounts due borrowers on unadvanced loans, any charge-offs, the allowance for loan losses and any deferred fees or costs on originated loans, or unamortized premiums or discounts on purchased loans.
	Interest on loans is recognized on a simple interest basis.
	Loan origination and commitment fees and certain direct origination costs are deferred, and the net amount amortized as an adjustment of the related loan’s yield. The Company is amortizing these amounts over the contractual lives of the related loans.
	Residential real estate loans are generally placed on nonaccrual when reaching 90 days past due or in process of foreclosure. All closed-end consumer loans 90 days or more past due and any equity line in the process of foreclosure are placed on nonaccrual status. Secured consumer loans are written down to realizable value and unsecured consumer loans are charged off upon reaching 120 or 180 days past due depending on the type of loan. Commercial real estate loans and commercial business loans and leases which are 90 days or more past due are generally placed on nonaccrual status, unless secured by sufficient cash or other assets immediately convertible to cash. When a loan has been placed on nonaccrual status, previously accrued and uncollected interest is reversed against interest on loans. A loan can be returned to accrual status when collectibility of principal is reasonably assured and the loan has performed for a period of time, generally six months.
	Cash receipts of interest income on impaired loans is credited to principal to the extent necessary to eliminate doubt as to the collectibility 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 and is based upon management’s periodic review of the collectibility of the loans in light of historical experience, the nature and volume of the loan portfolio, adverse situations that may affect the borrower’s ability to repay, estimated value of any underlying collateral and prevailing economic conditions. This evaluation is inherently subjective as it requires estimates that are susceptible to significant revision as more information becomes available.
	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, commercial real estate, construction, commercial 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 the years ended December 31, 2014 and 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: The Company generally does not originate loans with a loan-to-value ratio greater than 80 percent and does not grant subprime loans. All loans in this segment are 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 and multi-family real estate: Loans in this segment are primarily income-producing properties throughout Eastern Massachusetts, specifically the South Shore. 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 periodically obtains rent rolls and continually monitors the cash flows of these loans.
	Construction loans: Loans in this segment include land, speculative residential properties, investment multifamily, rehab to permanent investment properties and owner occupied residential properties. Payment is derived from sale of the property or long term rental cash flows once converted to permanent financing. Credit risk is affected by cost overruns, time to sell at an adequate price, vacancies and market conditions.
	Commercial loans: Loans in this segment are made to businesses, are generally secured by assets of the business and are primarily guaranteed by the United States Government. Repayment is expected from the cash flows of the business. A weakened economy, and resultant decreased consumer spending, will have an effect on the credit quality in this segment.
	Consumer loans: Loans in this segment are primarily secured by automobiles and repayment is dependent on the credit quality of the individual borrower.
	Allocated Component:
	The allocated component relates to loans that are classified as impaired. Impairment is measured on a loan by loan basis for commercial, commercial real estate and construction loans by either the present value of expected future cash flows discounted at the loan’s effective interest rate or the fair value of the collateral if the loan is collateral dependent. An allowance is established when the discounted cash flows (or collateral value) of the impaired loan are lower than the carrying value of that loan. Large groups of smaller balance homogeneous loans are collectively evaluated for impairment. Accordingly, the Company does not separately identify individual consumer and residential real estate loans for impairment disclosures, unless such loans are subject to a troubled debt restructuring agreement.
	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 on a temporary or permanent basis. When a loan is modified and a concession is made to a borrower experiencing financial difficulty, the modification is considered a troubled debt restructuring (“TDR”). All TDRs are initially classified as impaired.
	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.
	PREMISES AND EQUIPMENT:
	Land is stated at cost. Premises and equipment are stated at cost, less accumulated depreciation and amortization. Cost and related allowances for depreciation and amortization of premises and equipment retired or otherwise disposed of are removed from the respective accounts with any gain or loss included in income or expense. Depreciation and amortization are calculated principally on a straight-line basis over the estimated useful lives of the assets. Useful lives are dependent upon the nature and condition of the asset and range from one year to 40 years.
	OTHER REAL ESTATE OWNED AND IN-SUBSTANCE FORECLOSURES:
	Other real estate owned includes properties acquired through foreclosure and properties classified as in-substance foreclosures in accordance with ASC 310-40, “Receivables - Troubled Debt Restructuring by Creditors.” These properties are carried at their estimated fair value, less estimated selling costs. Any writedown from cost to estimated fair value required at the time of foreclosure or classification as in-substance foreclosure is charged to the allowance for loan losses. Expenses incurred in connection with maintaining these assets, subsequent writedowns and gains or losses recognized upon sale are included in other expense.
	In accordance with ASC 310-10-35, “Receivables - Overall - Subsequent Measurement,” 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.
	BANK-OWNED LIFE INSURANCE:
	The Company has purchased insurance policies on the lives of certain directors, executive officers and employees. Bank-owned life insurance policies are reflected on the consolidated balance sheets at cash surrender value. Changes in net cash surrender value of the policies, as well as insurance proceeds received, are reflected in non-interest income on the consolidated statements of income and are not subject to income taxes.
	ADVERTISING:
	The Company directly expenses costs associated with advertising as they are incurred.
	INCOME TAXES:
	The Company recognizes income taxes under the asset and liability method. Under this method, deferred tax assets and liabilities are established for the temporary differences between the accounting basis and the tax basis of the Company’s assets and liabilities at enacted tax rates expected to be in effect when the amounts related to such temporary differences are realized or settled.
	FAIR VALUES OF FINANCIAL INSTRUMENTS:
	Accounting Standards Codification (ASC) 825, “Financial Instruments,” requires that the Company disclose estimated fair values for its financial instruments. Fair value methods and assumptions used by the Company in estimating its fair value disclosures are as follows:
	Cash and cash equivalents: The carrying amounts reported in the consolidated balance sheets for cash and cash equivalents approximate those assets’ fair values.
	Interest-bearing time deposits with other banks: The fair value of interest-bearing time deposits with other banks was determined by discounting the cash flows associated with these instruments using current market rates for deposits with similar characteristics.
	Securities: Fair values for securities 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.
	Loans receivable: 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 by discounting the future cash flows, using interest rates currently being offered for loans with similar terms to borrowers of similar credit quality.
	Accrued interest receivable: The carrying amount of accrued interest receivable approximates its fair value.
	Deposit liabilities: The fair values disclosed for demand deposits, regular savings, NOW accounts, and money market accounts are equal to the amount payable on demand at the reporting date (i.e., their carrying amounts). Fair values for certificates of deposit 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 time deposits.
	Federal Home Loan Bank advances: Fair values for Federal Home Loan Bank advances are estimated using a discounted cash flow technique that applies interest rates currently being offered on advances to a schedule of aggregated expected monthly maturities on Federal Home Loan Bank advances.
	Off-balance sheet instruments: The fair value of commitments to originate loans is estimated using the fees currently charged to enter similar agreements, taking into account the remaining terms of the agreements and the present creditworthiness of the counterparties. For fixed-rate loan commitments and the unadvanced portion of loans, fair value also considers the difference between current levels of interest rates and the committed rates.
	PENSION PLAN:
	The Company provided pension benefits for its employees through participation in the Co-Operative Banks’ Employees Retirement Association. The Plan was frozen as of April 30, 2014 and therefore there are no future funding requirements or obligation on the part of the Company.
EARNINGS PER SHARE (EPS):
When presented, basic EPS is computed by dividing income available to common stockholders by the weighted-average number of common shares outstanding for the period. Diluted EPS reflects the potential dilution that could occur if securities or other contracts to issue common stock were exercised or converted into common stock or resulted in the issuance of common stock that then shared in the earnings of the entity. Because the formation of the Company was completed on October 10, 2014, earnings per share data is not meaningful for current and prior comparative periods and is therefore not presented.
RECENT ACCOUNTING PRONOUNCEMENTS:
In April 2014, the Financial Accounting Standards Board (FASB) issued Accounting Standards Update (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 in the first quarter of 2015 with calendar year ends. The adoption of this guidance is not expected to have an impact on the Company’s 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 amendments in this update are effective for annual reporting periods beginning after December 15, 2017, and interim periods within annual periods beginning after December 15, 2018. Early application is permitted, but no earlier than an annual reporting period beginning after December 15, 2016, including interim periods within that reporting period. The Company is currently reviewing this ASU to determine if it will have an 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 for a public business entity is prohibited; however, all other entities may elect to apply the requirements for interim periods beginning after December 15, 2014. The adoption of this guidance is not expected to have a material impact on the Company’s 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 adoption of this guidance is not expected to have a material impact on the Company’s 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 ending after December 15, 2016, and interim periods, beginning after December 15, 2016. Early adoption is permitted as of the beginning of an annual period. 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 2014-14, “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 ending after December 15, 2015, and interim periods, beginning after December 15, 2015. 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 or 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 of 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 results of operations or financial position.
In August 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 beginning after December 15, 2015, and interim periods within fiscal years beginning after December 15, 2016. Early adoption is permitted. The adoption of this guidance is not expected to have an impact on the Company’s results of operations or financial position.
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 Company anticipates that the adoption of this ASU will not have an impact on its results of operations or financial position.
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 results of operations or financial position.

Investments_in_Securities

Investments in Securities	12 Months Ended
	Dec. 31, 2014
Investments, Debt and Equity Securities [Abstract]
Investments in Securities	NOTE 3 - INVESTMENTS IN SECURITIES
	Investments in securities have been classified in the consolidated balance sheets according to management’s intent. The amortized cost of securities and their approximate fair values are as follows :
			Amortized		Gross		Gross			Fair
			Cost		Unrealized		Unrealized			Value
			Basis		Gains		Losses
			(In Thousands)
	Available-for-sale securities:
	December 31, 2014 :
	Debt securities issued by U.S. government corporations and agencies		$	1,985	$	7	$	17		$	1,975
	Debt securities issued by states of the United States and political subdivisions of the states			3,258		5		30			3,233
	Mortgage-backed securities			6,606		24		71			6,559
			$	11,849	$	36	$	118		$	11,767
	December 31, 2013:
	Debt securities issued by the U.S. Treasury and other U.S. government corporations and agencies		$	2,460	$	—	$	138		$	2,322
	Debt securities issued by states of the United States and political subdivisions of the states			4,447		45		120			4,372
	Mortgage-backed securities			6,148		27		155			6,020
	Mutual funds			782		—		—			782
			$	13,837	$	72	$	413		$	13,496
			Amortized		Gross		Gross			Fair
			Cost		Unrealized		Unrealized			Value
			Basis		Gains		Losses
			(In Thousands)
	Held-to-maturity securities:
	December 31, 2014 :
	Mortgage-backed securities		$	149	$	47	$	—		$	196
			$	149	$	47	$	—		$	196
	December 31, 2013:
	Debt securities issued by the U.S. Treasury and other U.S. government corporations and agencies		$	26	$	—	$	1		$	25
	Mortgage-backed securities			228		43		12			259
			$	254	$	43	$	13		$	284
	The scheduled maturities of debt securities were as follows as of December 31, 2014:
			Available-For-Sale		Held-To-Maturity
			Fair		Amortized		Fair
			Value		Cost		Value
					Basis
			(In Thousands)
	Due within one year		$	369	$	—	$	—
	Due after one year through five years			1,346		—		—
	Due after five years through ten years			1,830		—		—
	Due after ten years			1,663		—		—
	Mortgage-backed securities			6,559		149		196
			$	11,767	$	149	$	196
	During 2014, proceeds from sales of available-for-sale securities amounted to $3,312,000. Gross realized gains on those sales amounted to $72,000 and gross realized losses amounted to $4,000. During 2013, proceeds from sales of available-for-sale securities amounted to $3,569,000. Gross realized gains on those sales on those sales amounted to $34,000 and gross realized losses amounted to $29,000. The tax expense applicable to these net realized gains for the years ended December 31, 2014 and 2013 amounted to $24,000 and $2,000, respectively.
	As of December 31, 2014 and 2013, there were no securities of issuers whose aggregate carrying amount exceeded 10% of stockholders’ equity.
	The aggregate fair value and unrealized losses of securities that have been in a continuous unrealized loss position for less than twelve months and for twelve months or more are as follows:
			Less than 12 Months				12 Months or Longer					Total
			Fair		Unrealized		Fair			Unrealized		Fair		Unrealized
			Value		Losses		Value			Losses		Value		Losses
			(In Thousands)
	December 31, 2014 :
	Debt securities issued by U.S. government corporations and agencies		$	—	$	—	$	1,485		$	17	$	1,485	$	17
	Debt securities issued by states of the United States and political subdivisions of the states			950		8		1,232			22		2,182		30
	Mortgage-backed securities			1,411		3		2,641			68		4,052		71
	Total temporarily impaired securities			2,361		11		5,358			107		7,719		118
	Other-than-temporarily impaired securities:
	Mortgage-backed securities			—		—		3			—		3		—
	Total temporarily impaired and other-than-temporarily impaired securities		$	2,361	$	11	$	5,361		$	107	$	7,722	$	118
	December 31, 2013:
	Debt securities issued by the U.S. Treasury and other U.S. government corporations and agencies		$	2,322	$	138	$	25		$	1	$	2,347	$	139
	Debt securities issued by states of the United States and political subdivisions of the states			686		55		926			65		1,612		120
	Mortgage-backed securities			2,701		75		1,058			79		3,759		154
	Total temporarily impaired securities			5,709		268		2,009			145		7,718		413
	Other-than-temporarily impaired securities:
	Mortgage-backed securities			—		—		7			13		7		13
Total temporarily impaired and other-than-temporarily impaired securities		$	5,709	$	268	$	2,016		$	158	$	7,725	$	426
As of December 31, 2014, investment securities with unrealized losses consist of debt securities issued by U.S. government corporations and government-sponsored agencies, debt securities issued by states of the United States and political subdivisions of the states and non-agency mortgage-backed securities. As of December 31, 2013, investment securities with unrealized losses consist of debt securities issued by the U.S. Treasury and other U.S. government corporations and government-sponsored agencies, debt securities issued by states of the United States and political subdivisions of the states and non-agency mortgage-backed securities. The Company reviews investments for other-than-temporary impairment using a number of factors including the length of time and the extent to which the market value has been less than cost and by examining any credit deterioration or ratings downgrades. The unrealized losses in the above tables are primarily attributable to changes in market interest rates. As Company management has the intent and ability to hold impaired debt securities until maturity, or for the foreseeable future if classified as available-for-sale, no declines are deemed to be other-than-temporary.
For those debt securities for which the fair value of the security is less than its amortized cost and the Company does not intend to sell such security and it is more likely than not that it will not be required to sell such security prior to the recovery of its amortized cost basis less any credit losses, ASC 320-10, “Investments - Debt and Equity Securities,” requires that the credit component of the other-than-temporary impairment losses be recognized in earnings while the noncredit component is recognized in other comprehensive income, net of related taxes.
Upon acquisition of a security, the Company decides whether it is within the scope of the accounting guidance for beneficial interests in securitized financial assets or will be evaluated for impairment under the accounting guidance for investments in debt and equity securities.
The accounting guidance for beneficial interests in securitized financial assets provides incremental impairment guidance for a subset of debt securities within the scope of the guidance for investments in debt and equity securities. For securities where the security is a beneficial interest in securitized financial assets, the Company uses the beneficial interests in securitized financial assets impairment model. For securities where the security is not a beneficial interest in securitized financial assets, the Company uses the debt and equity securities impairment model.
The following table summarizes other-than-temporary impairment losses on securities for the years ended December 31, 2014 and 2013:
		December 31,
		2014		2013
		Non-Agency		Mutual		Non-Agency
		Mortgage-Backed		Funds		Mortgage-Backed
		Securities				Securities
		(In Thousands)
Total other-than-temporary impairment losses		$	12	$	218	$	37
Less: unrealized other-than-temporary losses recognized in other comprehensive income (1)			—		—		(8	)
Net impairment losses recognized in earnings (2)		$	12	$	218	$	29
-1	Represents the noncredit component of the other-than-temporary impairment on the securities.
-2	Represents the credit component of the other-than-temporary impairment on securities.
For the year ended December 31, 2014, debt securities with other-than-temporary impairment losses related to credit quality that were recognized in earnings consisted of one non-agency mortgage-backed security. For the year ended December 31, 2013, debt securities with other-than-temporary impairment losses related to credit quality that were recognized in earnings consisted of a mutual fund and non-agency mortgage-backed securities. The Company estimated the credit component portion of loss for the non-agency mortgage-backed securities using a discounted cash flow model. Significant inputs for the non-agency mortgage-backed securities included estimated cash flows of the underlying collateral based on key assumptions such as default rate, loss severity and prepayment rate. The present value of the expected cash flows were compared to the Company’s holdings to determine the credit-related impairment loss. Based on the expected cash flows derived from the model, the Company expects to recover the remaining unrealized losses on non-agency mortgage-backed securities.

Loans

Loans	12 Months Ended
	Dec. 31, 2014
Receivables [Abstract]
Loans	NOTE 4 - LOANS
	Loans consisted of the following:
		December 31,
		2014			2013
		(In Thousands)
	Real estate loans:
	One-to four- family residential	$	96,440		$	92,383
	Commercial		17,401			19,380
	Multi-family		10,171			9,882
	Home equity loans and lines of credit		2,854			3,976
	Construction		12,072			3,513
	Commercial and industrial loans		3,012			2,506
	Consumer loans:
	Consumer line of credit		21			19
	Other consumer loans		2,446			1,919
			144,417			133,578
	Net deferred loan origination fees, costs and discounts		100			87
	Allowance for loan losses		(743	)		(742	)
	Net loans	$	143,774		$	132,923
	The following tables set forth information regarding the allowance for loan losses as of and for the years ended December 31:
		Real Estate:																		Consumer
		One- to			Commercial			Multi-family			Home Equity			Construction			Commercial			Consumer			Other			Unallocated			Total
		four-family									Loans and						and			Line of			Consumer
		Residential									Lines of						Industrial			Credit
											Credit						Loans
		(In Thousands)
	December 31, 2014 :
	Allowance for loan losses:
	Beginning balance	$	323		$	195		$	51		$	30		$	49		$	16		$	1		$	20		$	57		$	742
	Charge-offs		—			—			—			—			—			—			—			—			—			—
	Recoveries		1			—			—			—			—			—			—			—			—			1
	Provision (benefit)		38			(61	)		(15	)		(3	)		72			(8	)		—			—			(23	)		—
	Ending balance	$	362		$	134		$	36		$	27		$	121		$	8		$	1		$	20		$	34		$	743
	Ending balance:
	Individually evaluated for impairment	$	37		$	—		$	—		$	—		$	—		$	—		$	—		$	—		$	—		$	37
	Ending balance:
	Collectively evaluated for impairment		325			134			36			27			121			8			1			20			34			706
	Total allowance for loan losses ending balance	$	362		$	134		$	36		$	27		$	121		$	8		$	1		$	20		$	34		$	743
	Loans:
	Ending balance:
	Individually evaluated for impairment	$	6,572		$	695		$	—		$	53		$	—		$	—		$	—		$	—		$	—		$	7,320
	Ending balance:
	Collectively evaluated for impairment		89,868			16,706			10,171			2,801			12,072			3,012			21			2,446			—			137,097
	Total loans ending balance	$	96,440		$	17,401		$	10,171		$	2,854		$	12,072		$	3,012		$	21		$	2,446		$	—		$	144,417
		Real Estate:																		Consumer
		One- to			Commercial			Multi-family			Home Equity			Construction			Commercial			Consumer			Other			Unallocated			Total
		four-family									Loans and						and			Line of			Consumer
		Residential									Lines of						Industrial			Credit
											Credit						Loans
		(In Thousands)
	December 31, 2013:
	Allowance for loan losses:
	Beginning balance	$	362		$	152		$	35		$	46		$	50		$	7		$	2		$	37		$	97		$	788
	Charge-offs		(48	)		—			—			—			—			—			—			(3	)		—			(51	)
	Recoveries		—			—			—			—			—			—			—			5			—			5
	Provision (benefit)		9			43			16			(16	)		(1	)		9			(1	)		(19	)		(40	)		—
	Ending balance	$	323		$	195		$	51		$	30		$	49		$	16		$	1		$	20		$	57		$	742
	Ending balance:
	Individually evaluated for impairment	$	80		$	—		$	—		$	—		$	—		$	—		$	—		$	—		$	—		$	80
	Ending balance:
	Collectively evaluated for impairment		243			195			51			30			49			16			1			20			57			662
	Total allowance for loan losses ending balance	$	323		$	195		$	51		$	30		$	49		$	16		$	1		$	20		$	57		$	742
	Loans:
	Ending balance:
Individually evaluated for impairment	$	6,126		$	703		$	—		$	—		$	—		$	—		$	—		$	—		$	—		$	6,829
Ending balance:
Collectively evaluated for impairment		86,257			18,677			9,882			3,976			3,513			2,506			19			1,919			—			126,749
Total loans ending balance	$	92,383		$	19,380		$	9,882		$	3,976		$	3,513		$	2,506		$	19		$	1,919		$	—		$	133,578
Certain directors and executive officers of the Company and companies in which they have significant ownership interest were customers of the Bank during 2014. Total loans to such persons and their companies amounted to $693,000 as of December 31, 2014. During 2014, principal payments were $58,000 and there were no principal advances.
The following tables set forth information regarding nonaccrual loans and past-due loans:
	30-59			60-89			90 Days			Total			Total			Total			90 Days or			Nonaccrual
	Days			Days			or More			Past Due			Current						More Past			Loans
							Past Due												Due
																			and Accruing
	(In Thousands)
December 31, 2014:
Real estate loans:
One- to four-family residential	$	728		$	—		$	1,393		$	2,121		$	94,319		$	96,440		$	—		$	1,419
Commercial		—			—			—			—			17,401			17,401			—			—
Multi-family		938			—			—			938			9,233			10,171			—			—
Home equity loans and lines of credit		—			53			—			53			2,801			2,854			—			—
Construction		—			—			—			—			12,072			12,072			—			—
Commercial and industrial loans		—			—			—			—			3,012			3,012			—			—
Consumer loans:
Consumer line of credit		—			—			—			—			21			21			—			—
Other consumer		9			—			—			9			2,437			2,446			—			—
Total	$	1,675		$	53		$	1,393		$	3,121		$	141,296		$	144,417		$	—		$	1,419
December 31, 2013:
Real estate loans:
One- to four-family residential	$	—		$	240		$	2,075		$	2,315		$	90,068		$	92,383		$	—		$	2,344
Commercial		—			—			—			—			19,380			19,380			—			—
Multi-family		—			—			—			—			9,882			9,882			—			—
Home equity loans and lines of credit		—			—			—			—			3,976			3,976			—			8
Construction		—			—			—			—			3,513			3,513			—			—
Commercial and industrial loans		—			—			—			—			2,506			2,506			—			—
Consumer loans:
Consumer line of credit		—			—			—			—			19			19			—			—
Other consumer		—			—			—			—			1,919			1,919			—			—
Total	$	—		$	240		$	2,075		$	2,315		$	131,263		$	133,578		$	—		$	2,352
Information about loans that meet the definition of an impaired loan in ASC 310-10-35 is as follows:
	Recorded			Unpaid			Related			Average			Interest
	Investment			Principal			Allowance			Recorded			Income
				Balance						Investment			Recognized
	(In Thousands)
December 31, 2014:
With no related allowance recorded:
Real estate loans:
One- to four-family residential	$	5,991		$	5,991		$	—		$	5,586		$	226
Commercial		695			695			—			699			50
Home equity line of credit		53			53			—			8			—
Total impaired with no related allowance	$	6,739		$	6,739		$	—		$	6,293		$	276
With an allowance recorded:
Real estate loans:
One- to four-family residential	$	581		$	581		$	37		$	589		$	22
Commercial		—			—			—			—			—
Home equity line of credit		—			—			—			—			—
Total impaired with an allowance recorded	$	581		$	581		$	37		$	589		$	22
Total
Real estate loans:
One- to four-family residential	$	6,572		$	6,572		$	37		$	6,175		$	248
Commercial		695			695			—			699			50
Home equity line of credit		53			53			—			8			—
Total impaired loans	$	7,320		$	7,320		$	37		$	6,882		$	298
December 31, 2013:
With no related allowance recorded:
Real estate loans:
One- to four-family residential	$	4,143		$	4,143		$	—		$	4,150		$	168
Commercial		703			703			—			706			58
Total impaired with no related allowance	$	4,846		$	4,846		$	—		$	4,856		$	226
With an allowance recorded:
Real estate loans:
One- to four-family residential	$	1,983		$	1,983		$	80		$	1,997		$	103
Commercial		—			—			—			—			—
Total impaired with an allowance recorded	$	1,983		$	1,983		$	80		$	1,997		$	103
Total
Real estate loans:
One- to four-family residential	$	6,126		$	6,126		$	80		$	6,147		$	271
Commercial		703			703			—			706			58
Total impaired loans	$	6,829		$	6,829		$	80		$	6,853		$	329
The following tables present the Company’s loans by risk rating:
	Real Estate:																		Consumer
	One- to			Commercial			Multi-			Home Equity			Construction			Commercial			Consumer			Other			Total
	four-family						family			Loans and						and			Line of			Consumer
	Residential									Lines of						Industrial			Credit
										Credit						Loans
	(In Thousands)
December 31, 2014:
Grade:
Pass	$	—		$	16,706		$	9,233		$	—		$	12,072		$	3,012		$	—		$	—		$	41,023
Special mention		2,417			695			—			53			—			—			—			—			3,165
Substandard		1,393			—			938			—			—			—			—			—			2,331
Loans not formally rated		92,630			—			—			2,801			—			—			21			2,446			97,898
Total	$	96,440		$	17,401		$	10,171		$	2,854		$	12,072		$	3,012		$	21		$	2,446		$	144,417
December 31, 2013:
Grade:
Pass	$	—		$	17,829		$	8,932		$	—		$	3,513		$	2,506		$	—		$	—		$	32,780
Special mention		302			132			—			—			—			—			—			—			434
Substandard		4,227			1,419			950			8			—			—			—			—			6,604
Loans not formally rated		87,854			—			—			3,968			—			—			19			1,919			93,760
Total	$	92,383		$	19,380		$	9,882		$	3,976		$	3,513		$	2,506		$	19		$	1,919		$	133,578
Credit Quality Information
The Company utilizes a seven grade internal loan rating system for commercial real estate, construction and commercial loans as follows:
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 real estate, construction and commercial loans. For residential real estate and consumer loans, the Company initially assesses credit quality based upon the borrower’s ability to pay and subsequently monitors these loans based on the borrower’s payment activity.
The Company classifies loans modified as TDRs as impaired loans with an allowance established as part of the allocated component of the allowance for loan losses when the discounted cash flows or value of the underlying collateral of the impaired loan is lower than its carrying value.
During the year ended December 31, 2014, there were two related loans modified as TDRs. The following tables set forth information regarding loans modified as TDRs during the years ended December 31, 2014 and 2013:
	Number of			Pre-Modification			Post-Modification
	Contracts			Outstanding Recorded			Outstanding Recorded
				Investment			Investment
	(Dollars In Thousands)
December 31, 2014:
Troubled Debt Restructurings:
Real estate loans:
One- to four- family residential		1		$	521		$	521
Home equity loans and lines of credit		1			53			53
		2		$	574		$	574
	Number of			Pre-Modification			Post-Modification
	Contracts			Outstanding Recorded			Outstanding Recorded
				Investment			Investment
	(Dollars In Thousands)
December 31, 2013:
Troubled Debt Restructurings:
Real estate loans:
One- to four- family residential		1		$	1,883		$	1,883
		1		$	1,883		$	1,883
As of December 31, 2014 and 2013, there were no loans modified as TDRs that subsequently defaulted.
As of December 31, 2014 and 2013, there were no commitments to lend additional funds to borrowers whose loans were modified in TDRs. As of December 31, 2014 and 2013, the loans were individually evaluated for impairment and it was determined that a specific allocation was not necessary during either period.
The following tables provide information on how loans were modified as TDRs:
	Rate			Interest Only			Rate Reduction and
	Reduction			Period			Interest Only Period
	(In Thousands)
December 31, 2014:
Real estate loans:
One- to four- family residential	$			$	521		$	—
Home equity loans and lines of credit		—			53			—
Total	$	—		$	574		$	—
December 31, 2013:
Real estate loans:
One- to four- family residential	$	—		$	1,883		$	—
Total	$	—		$	1,883		$	—
Loans serviced for others are not included in the accompanying consolidated balance sheets. The unpaid balances of mortgage and other loans serviced for others were $17,635,000 and $16,755,000 at December 31, 2014 and 2013, respectively.

Premises_and_Equipment

Premises and Equipment	12 Months Ended
	Dec. 31, 2014
Property, Plant and Equipment [Abstract]
Premises and Equipment	NOTE 5 - PREMISES AND EQUIPMENT
	The following is a summary of premises and equipment:
		December 31,
		2014			2013
		(In Thousands)
	Land	$	864		$	864
	Buildings and improvements		5,373			5,356
	Furniture and equipment		2,196			2,084
			8,433			8,304
	Accumulated depreciation and amortization		(3,024	)		(2,733	)
		$	5,409		$	5,571

Investment_in_Real_Estate

Investment in Real Estate	12 Months Ended
	Dec. 31, 2014
Real Estate [Abstract]
Investment in Real Estate	NOTE 6 - INVESTMENT IN REAL ESTATE
	The following is a summary of investment in real estate:
		December 31,
		2014			2013
		(In Thousands)
	Land	$	453		$	453
	Buildings and improvements		1,489			1,489
			1,942			1,942
	Accumulated depreciation		(319	)		(280	)
		$	1,623		$	1,662
	The Company’s rental income for the years ended December 31, 2014 and 2013, amounted to $262,000 and $204,000, respectively.

Deposits

Deposits	12 Months Ended
	Dec. 31, 2014
Banking and Thrift [Abstract]
Deposits	NOTE 7 - DEPOSITS
	The aggregate amount of time deposit accounts in denominations of $100,000 or more as of December 31, 2014 and 2013 was $38,696,000 and $35,437,000, respectively.
	The aggregate amount of time deposit accounts in denominations that meet or exceed the Federal Deposit Insurance Corporation (FDIC) insurance limit (currently $250,000) at December 31, 2014 was $15,727,000.
	For time deposits as of December 31, 2014, the scheduled maturities for each of the following five years ended December 31 are:
		(In Thousands)
	2015	$	33,133
	2016		10,023
	2017		9,212
	2018		13,344
	2019		771
	Total	$	66,483

Federal_Home_Loan_Bank_Advance

Federal Home Loan Bank Advances	12 Months Ended
	Dec. 31, 2014
Banking and Thrift [Abstract]
Federal Home Loan Bank Advances	NOTE 8 - FEDERAL HOME LOAN BANK ADVANCES
	Advances consist of funds borrowed from the Federal Home Loan Bank of Boston (FHLB).
	Maturities of advances from the FHLB for the years ending after December 31, 2014 are summarized as follows:
		(In Thousands)
	2015	$	5,000
		$	5,000
	Interest rates range from .24% to 2.32% with a weighted-average interest rate of .63% at December 31, 2014.
	Borrowings from the FHLB are secured by a blanket lien on qualified collateral, consisting primarily of loans with first mortgages secured by one-to-four family properties, certain unencumbered investment securities and other qualified assets.

Income_Taxes

Income Taxes	12 Months Ended
	Dec. 31, 2014
Income Tax Disclosure [Abstract]
Income Taxes	NOTE 9 - INCOME TAXES
	The components of income tax expense are as follows:
		Years Ended
		December 31,
		2014			2013
		(In Thousands)
	Current:
	Federal	$	169		$	185
	State		38			48
			207			233
	Deferred:
	Federal		(220	)		322
	State		(49	)		(15	)
	Change in valuation allowance		128			(380	)
			(141	)		(73	)
	Total income tax expense	$	66		$	160
	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
		% of			% of
		Income			Income
	Statutory federal income tax rate		(34.0	)%		34	%
	Increase (decrease) in tax rates resulting from:
	Tax-exempt income		(78.4	)		(9.2	)
	Expiration of capital loss carryforwards		—			72
	Other		8			1.4
	State tax, net of federal tax		(14.0	)		4.1
	Change in valuation allowance		244.2			(72.0	)
	Effective tax rates		125.8	%		30.3	%
	The Company had gross deferred tax assets and gross deferred tax liabilities as follows:
		December 31,
		2014			2013
		(In Thousands)
	Deferred tax assets:
	Allowance for loan losses	$	302		$	300
	Securities capital loss carryforwards		55			4
	Writedown of securities		15			100
	Interest on nonaccrual loans		31			21
	Net unrealized holding loss on available-for-sale securities		31			127
	Charitable contribution carryovers		290			—
	Gross deferred tax assets		724			552
	Valuation allowance		(129	)		(1	)
	Gross deferred tax assets after valuation allowance		595			551
	Deferred tax liabilities:
	Book basis in excess of tax basis of premises and equipment		(177	)		(186	)
	ESOP expense		(8	)		—
	Gross deferred tax liabilities		(185	)		(186	)
	Net deferred tax asset	$	410		$	365
	As of December 31, 2014 and 2013, the Company had no operating loss and tax credit carryovers for tax purposes. As of December 31, 2014, the Company had capital loss carryovers of $162,000, $2,000 of which are due to expire in 2016, $10,000 of which are due to expire in 2018, and $150,000 of which are due to expire in 2019. The capital losses can only be utilized against realized capital gains; therefore, as of December 31, 2014 a valuation allowance has been provided in the amount of $22,000 against the deferred tax benefit to the extent management deems it probable the deferred tax benefits will not be realized.
	In connection with its initial public offering, the Company donated common stock and cash in the amount of $725,000 to the Foundation, which resulted in a tax benefit of $290,000. As of December 31, 2014, a valuation allowance of $107,000 has been established against deferred tax assets related to the uncertain utilization of the charitable contribution carryforward created by the donation to the Foundation.
	The judgment applied by management considers the likelihood that sufficient taxable income will be realized within the carryforward period in light of its tax planning strategies and market conditions.
	The charitable contribution carryforward of $725,000 at December 31, 2014 expires in 2019 and the related tax benefit, net of the valuation allowance, included in net deferred tax assets is $183,000.
	It is the Company’s policy to provide for uncertain tax positions and the related interest and penalties based upon management’s assessment of whether a tax benefit is more likely than not to be sustained upon examination by tax authorities. As of December 31, 2014 and 2013, there were no material uncertain tax positions related to federal and state income tax matters. The Company is currently open to audit under the statute of limitations by the Internal Revenue Service and state taxing authorities for the years ended December 31, 2011 through December 31, 2014.

Employee_Benefits

Employee Benefits	12 Months Ended
	Dec. 31, 2014
Compensation and Retirement Disclosure [Abstract]
Employee Benefits	NOTE 10 - EMPLOYEE BENEFITS
	Pension Plan
	As a participating employer in the Co-operative Banks’ Employees Retirement Association (CBERA) multi-employer plan, the Company had in effect a pension plan covering substantially all eligible officers and employees. Under the plan, the Company contributed amounts so that, upon retirement, the officer or employee will receive a percent of their annual compensation as defined by the plan. The plan was frozen as of April 30, 2014, and therefore there are no future funding requirements or obligation on the part of the Company. As of December 31, 2013, there were 43 participating employers in the plan. The required disclosures are contained in the table below.
	Name of Plan:	The Defined Benefit Plan (Plan C) of the CBERA Retirement Program
	Plan’s Tax ID #:	04-6035593
	Plan Number:	334
	Plan Year End:	31-Dec-13
	Actuarial Valuation:	1-Jan-13
	FTAP Percentage:	117% (Green)
	(Funded Target Attainment Percentage)
	Employer Plan Year Contributions:	$88,000
		Did not exceed 5%
	Funding Improvement:	The Company was not subject to any specific minimum contributions other than amounts, determined by the Trustees of the plan, that maintain the funded status of the plan in accordance with the requirements of the Pension Protection Act (PPA) and the Employee Retirement Income Security Act (ERISA).
	The Company’s contribution expense under this plan was $0 and $88,000 for the years ended December 31, 2014 and 2013, respectively.
	401(k) Plan
	The Company provides a savings and retirement plan for employees through the Co-operative Banks’ Employees Retirement Association (CBERA) 401(k) Plan, which is a multiple employer tax-qualified profit sharing plan with a salary deferral feature under Section 401(k) of the Internal Revenue Code (“401(k) Plan”). All employees who have attained age 21 and have completed three months of employment during which they worked at least 250 hours are eligible to participate in the 401(k) Plan.
	The plan provides for voluntary contributions by participating employees ranging from 1% to 75% of their compensation, subject to the limitations imposed by the Internal Revenue Code. In addition to salary deferral contributions, the Company will make a matching contribution to each participant’s account equal to 100% of the participant’s contribution, up to 5% of the participant’s pre-tax and after-tax contributions. For the years ended December 31, 2014 and 2013, contribution expense attributable to the plan amounted to $85,000 and $81,000, respectively.
	Incentive Plan
	The Company has a discretionary Incentive Plan whereby all employees are eligible to receive a payment if the Company meets or exceeds certain base performance standards for its fiscal year. The structure of the Incentive Plan is to be reviewed on an annual basis by the Board of Directors. Incentive compensation expense for the years ended December 31, 2014 and 2013 amounted to $115,000 and $59,000, respectively.
	Executive Annual Incentive Plan
	The Company has adopted an executive incentive plan effective January 1, 2015, which will supersede and replace the discretionary bonus arrangement above for certain named executive officers. For each plan year (which is the calendar year), each participant will receive an award agreement, which will provide the annual bonus award amount, designated as a percentage of base salary, and the performance objectives that must be satisfied for the participant to receive the annual bonus award. The specific performance objectives will be determined annually by the Company, but generally include objective performance targets on financial performance, growth, asset quality and risk management and subjective performance objectives, such as particular qualitative factors for the participant, based on his or her duties to the Company. Each performance objective will specify level of achievements at “threshold,” “target” and “maximum” levels and will be weighted by priority as a percentage of the total annual bonus award payable to the participant.
	Executive Supplemental Retirement Plan
	The Company has adopted a supplemental executive retirement plan (“SERP”) effective January 1, 2014. The SERP is a non-qualified retirement plan that provides supplemental retirement benefits to participants who are key employees as designated by the Compensation Committee. The President and Chief Executive Officer is currently the only participant in the SERP. For the year ended December 31, 2014, total expense applicable to this plan amounted to $43,000.
	Employee Stock Ownership Plan
	The Company has adopted a tax-qualified employee stock ownership plan (“ESOP”) for the benefit of eligible employees. On October 10, 2014, in accordance with a Plan of Conversion (the “Conversion”), Conahasset Bancshares, MHC, the Bank’s former mutual holding company, completed a mutual-to-stock conversion pursuant to which the Bank became a wholly owned subsidiary of Pilgrim Bancshares, Inc., (the “Company”) a stock holding company incorporated in February 2014. The Company completed its initial public offering in connection with the conversion transaction by selling a total of 2,182,125 shares of common stock at a purchase price of $10.00 per share in a subscription offering, of which 179,807 shares were purchased by the Bank’s ESOP.
	The ESOP funded its stock purchase through a loan from the Company equal to 100% of the aggregate purchase price of the common stock. The ESOP trustee will repay the loan principally through the Bank’s contributions to the ESOP and, possibly, dividends paid on common stock held by the plan over the loan term of 29.2 years.
	The trustee will hold the shares purchased by the ESOP in an unallocated suspense account. Shares will be released from the suspense account on a pro-rata basis as the loan is repaid. The trustee will allocate the shares released among the participants’ accounts on the basis of each participant’s proportional share of compensation relative to all participants. Participants will vest in their benefit at a rate of 20% per year, beginning after the completion of their second year of service, such that the participants will be 100% vested upon completion of six years of credited services. Participants who were employed by the Bank immediately prior to the conversion will receive credit for vesting purposes for years of service prior to adoption of the ESOP. Participants also will become fully vested upon normal retirement, death or disability, a change in control, or termination of the employee stock ownership plan. Generally, participants will receive distributions from the ESOP upon severance from employment. The ESOP reallocates any unvested shares forfeited upon termination of employment among the remaining participants. Under applicable accounting requirements, the Company will record a compensation expense for the ESOP equal to the fair market value of the shares when they are committed to be released from the suspense account to participants’ accounts under the plan.
	At December 31, 2014, the remaining principal balance on the ESOP debt was $1,719,000 and the number of shares held by the ESOP was 179,807.
	Total compensation expense recognized in connection with the ESOP was $61,000 for the year ended December 31, 2014.
	The remaining principal balance on the ESOP debt as of December 31, 2014 is payable as follows:
	Years Ending	Amount
	December 31,
		(In Thousands)
	2015	$	37
	2016		38
	2017		39
	2018		40
	2019		42
	Thereafter		1,523
		$	1,719
	Shares held by the ESOP are as follows as of December 31:
		2014
	Allocated		—
	Committed to be allocated		5,994
	Unallocated		173,813
	Shares held by ESOP		179,807
	The fair value of unallocated ESOP shares was $1,898,000 at December 31, 2014.
	Employment Agreements
	The Bank has entered into an employment agreement with its President and Chief Executive Officer, with an initial term of three years. The agreement provides for a specified minimum annual compensation and the continuation of benefits currently received upon termination events, including a change in control, as defined in the agreement. The Bank has also entered into change in control agreements with two officers of the Bank with an initial term of two years, which provides for a lump sum severance payment, subject to limitations. These agreements must be approved by the Board of Directors on an annual basis after the initial term, with an extension for an additional year. If the Board of Directors determines not to extend the term, a notice of non-renewal must be issued.

OffBalance_Sheet_Activities

Off-Balance Sheet Activities	12 Months Ended
	Dec. 31, 2014
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Off-Balance Sheet Activities	NOTE 11 - OFF-BALANCE SHEET ACTIVITIES
	The Company is a party to financial instruments with off-balance sheet risk in the normal course of business to meet the financing needs of its customers. These financial instruments include commitments to extend credit. Those instruments involve, to varying degrees, elements of credit and interest rate risk in excess of the amounts recognized in the consolidated balance sheets. The contract or notional amounts of those instruments reflect the extent of involvement the Company has in particular classes of financial instruments.
	The Company’s exposure to credit loss in the event of nonperformance by the other party to the financial instrument for commitments to extend credit is represented by the contractual notional amount of those instruments. The Company uses the same credit policies in making commitments and conditional obligations as it does for on-balance sheet instruments.
	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 Company evaluates each customer’s creditworthiness on a case-by-case basis. The amount of collateral obtained, if deemed necessary by the Company upon extension of credit, is based on management’s credit evaluation of the borrower. Collateral held varies but usually includes income-producing commercial properties or residential real estate.
	Notional amounts of financial instrument liabilities whose contract amounts represent off-balance sheet credit risk are as follows:
		December 31,
		2014		2013
		(In Thousands)
	Commitments to originate loans	$	9,981	$	4,180
	Commitments to purchase loans		4,799		—
	Unadvanced funds on loans:
	Home equity lines of credit		3,389		3,848
	Construction loans		8,049		1,566
	Commercial lines of credit		1,517		1,771
	Consumer		104		141
		$	27,839	$	11,506
	There is no material difference between the notional amounts and the estimated fair values of the off-balance sheet liabilities.

Commitments_and_Contingent_Lia

Commitments and Contingent Liabilities	12 Months Ended
	Dec. 31, 2014
Commitments and Contingencies Disclosure [Abstract]
Commitments and Contingent Liabilities	NOTE 12 - COMMITMENTS AND CONTINGENT LIABILITIES
	In April 2012, the Company amended its agreement originally dated March 10, 2007 with a third party in which the third party is to provide the Company with data processing and other related services. The effective date of the amendment was May 1, 2012 for a seven-year term and will automatically renew for successive seven-year terms unless either party notifies the other of its intention not to renew. Each month, the Company shall pay certain minimum monthly charges, as defined in the agreement, as well as charges for any additional services provided.

Fair_Value_Measurements

Fair Value Measurements	12 Months Ended
	Dec. 31, 2014
Fair Value Disclosures [Abstract]
Fair Value Measurements	NOTE 13 - FAIR VALUE MEASUREMENTS
	ASC 820-10, “Fair Value Measurement - Overall,” provides a framework for measuring fair value under generally accepted accounting principles. This guidance also allows an entity the irrevocable option to elect fair value for the initial and subsequent measurement for certain financial assets and liabilities on a contract-by-contract basis.
	In accordance with ASC 820-10, the Company groups its financial assets and financial liabilities measured at fair value in three levels, based on the markets in which the assets and liabilities are traded and the reliability of the assumptions used to determine fair value.
	Level 1 - Valuations for assets and liabilities traded in active exchange markets, such as the New York Stock Exchange. Level 1 also includes U.S. Treasury, other U.S. Government and agency mortgage-backed securities that are traded by dealers or brokers in active markets. Valuations are obtained from readily available pricing sources for market transactions involving identical assets or liabilities.
	Level 2 - Valuations for assets and liabilities traded in less active dealer or broker markets. Valuations are obtained from third party pricing services for identical or comparable assets or liabilities.
	Level 3 - Valuations for assets and liabilities that are derived from other methodologies, including option pricing models, discounted cash flow models and similar techniques, are not based on market exchange, dealer, or broker traded transactions. Level 3 valuations incorporate certain assumptions and projections in determining the fair value assigned to such assets and liabilities.
	A financial instrument’s level within the fair value hierarchy is based on the lowest level of input that is significant to the fair value measurement.
	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 as of December 31, 2014 and 2013. The Company did not have any significant transfers between level 1 and level 2 of the fair value hierarchy during the year ended December 31, 2014.
	The Company’s cash instruments are generally classified within level 1 or level 2 of the fair value hierarchy because they are valued using quoted market prices, broker or dealer quotations, or alternative pricing sources with reasonable levels of price transparency.
	The Company’s investment in mortgage-backed securities and other debt securities available-for-sale is generally classified within level 2 of the fair value hierarchy. For these securities, we obtain fair value measurements from independent pricing services. The fair value measurements consider observable data that may include 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.
	Level 3 is for positions that are not traded in active markets or are subject to transfer restrictions, valuations are adjusted to reflect illiquidity and/or non-transferability, and such adjustments are generally based on available market evidence. In the absence of such evidence, management’s best estimate is used. Subsequent to inception, management only changes level 3 inputs and assumptions when corroborated by evidence such as transactions in similar instruments, completed or pending third-party transactions in the underlying investment or comparable entities, subsequent rounds of financing, recapitalization and other transactions across the capital structure, offerings in the equity or debt markets, and changes in financial ratios or cash flows.
	The Company’s impaired loans are reported at the fair value of the underlying collateral if repayment is expected solely from the collateral. Collateral values are estimated using level 2 inputs based upon appraisals of similar properties obtained from a third party. For level 3 inputs, fair value is based upon management estimates of the value of the underlying collateral or the present value of the expected cash flows.
	Other real estate owned values are estimated using level 2 inputs based upon appraisals of similar properties obtained from a third party. For level 3 inputs, fair values are based on management estimates.
	The following summarizes assets measured at fair value on a recurring basis as of December 31, 2014 and 2013:
		Fair Value Measurements at Reporting Date Using:
		Total		Quoted Prices in		Significant		Significant
				Active Markets		Other Observable		Unobservable
				for Identical		Inputs		Inputs
				Assets		Level 2		Level 3
				Level 1
		(In Thousands)
	December 31, 2014:
	Debt securities issued by U.S. government corporations and agencies	$	1,975	$	—	$	1,975	$	—
	Debt securities issued by states of the United States and political subdivisions of the states		3,233		—		3,233		—
	Mortgage-backed securities		6,559		—		6,559		—
	Totals	$	11,767	$	—	$	11,767	$	—
	December 31, 2013:
	Debt securities issued by the U.S. Treasury and other U.S. government corporations and agencies	$	2,322	$	—	$	2,322	$	—
	Debt securities issued by states of the United States and political subdivisions of the states		4,372		—		4,372		—
	Mortgage-backed securities		6,020		—		6,020		—
	Mutual funds		782		782		—		—
	Totals	$	13,496	$	782	$	12,714	$	—
	Under certain circumstances we make adjustments to fair value for certain assets and liabilities although they are not measured at fair value on an ongoing basis. The following table presents assets carried on the consolidated balance sheet by caption and by level in the fair value hierarchy at December 31, 2014 and 2013 for which a nonrecurring change in fair value has been recorded:
		Fair Value Measurements at Reporting Date Using:
		Total		Quoted Prices		Significant		Significant
				in Active		Other		Unobservable
				Markets for		Observable		Inputs
				Identical Assets		Inputs		Level 3
				Level 1		Level 2
		(In Thousands)
	December 31, 2014:
	Impaired loans	$	544	$	—	$	—	$	544
	Totals	$	544	$	—	$	—	$	544
	December 31, 2013:
	Impaired loans	$	1,903	$	—	$	—	$	1,903
	Totals	$	1,903	$	—	$	—	$	1,903
	The estimated fair values of the Company’s financial instruments, all of which are held or issued for purposes other than trading, are as follows:
		December 31, 2014
		Carrying		Fair Value
		Amount		Level 1		Level 2		Level 3		Total
		(In Thousands)
	Financial assets:
	Cash and cash equivalents	$	18,295	$	18,295	$	—	$	—	$	18,295
	Interest-bearing time deposits with other banks		2,575		—		2,578		—		2,578
	Available-for-sale securities		11,767		—		11,767		—		11,767
	Held-to-maturity securities		149		—		196		—		196
	Federal Home Loan Bank stock		694		694		—		—		694
	Investment in The Co-operative Central Reserve Fund		384		384		—		—		384
	Loans, net		143,774		—		—		146,705		146,705
	Accrued interest receivable		447		447		—		—		447
	Financial liabilities:
	Deposits		151,010		—		151,638		—		151,638
	FHLB advances		5,000		—		5,006		—		5,006
		31-Dec-13
	Carrying		Fair Value
	Amount		Level 1		Level 2		Level 3		Total
	(In Thousands)
Financial assets:
Cash and cash equivalents	$	8,991	$	8,991	$	—	$	—	$	8,991
Interest-bearing time deposits with other banks		4,511		—		4,518		—		4,518
Available-for-sale securities		13,496		782		12,714		—		13,496
Held-to-maturity securities		254		—		284		—		284
Federal Home Loan Bank stock		667		667		—		—		667
Investment in The Co-operative Central Reserve Fund		384		384		—		—		384
Loans, net		132,923		—		—		134,272		134,272
Accrued interest receivable		399		399		—		—		399
Financial liabilities:
Deposits		153,732		—		154,278		—		154,278
FHLB advances		5,000		—		5,182		—		5,182
The carrying amounts of financial instruments shown in the above table are included in the consolidated balance sheets as of December 31, 2014 and 2013 under the indicated captions. Accounting policies related to financial instruments are described in Note 2.

Significant_Group_Concentratio

Significant Group Concentrations of Credit Risk	12 Months Ended
	Dec. 31, 2014
Risks and Uncertainties [Abstract]
Significant Group Concentrations of Credit Risk	NOTE 14 - SIGNIFICANT GROUP CONCENTRATIONS OF CREDIT RISK
	Most of the Bank’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 Bank’s loan portfolio is comprised of loans collateralized by real estate located in the Commonwealth of Massachusetts.

Other_Comprehensive_Income_Los

Other Comprehensive Income (Loss)	12 Months Ended
	Dec. 31, 2014
Equity [Abstract]
Other Comprehensive Income (Loss)	NOTE 15 - OTHER COMPREHENSIVE INCOME (LOSS)
	Accounting principles generally require that recognized revenue, expenses, gains and losses be included in net income. Although certain changes in assets and liabilities are reported as a separate component of the equity section of the consolidated balance sheets, such items, along with net income, are components of comprehensive income.
	The components of other comprehensive income (loss), included in equity are as follows:
		Years Ended December 31,
		2014			2013
		(In Thousands)
	Net unrealized holding gain (loss) on available-for-sale securities	$	330		$	(593	)
	Reclassification adjustment for net realized (gains) losses in net income (1)		(71	)		219
	Other comprehensive income (loss) before income tax effect		259			(374	)
	Income tax (expense) benefit		(96	)		136
	Other comprehensive income (loss), net of tax	$	163		$	(238	)
	Accumulated other comprehensive loss as of December 31, 2014 and 2013, consists of net unrealized holding losses on
	available-for-sale securities, net of taxes.
	(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 (loss) income as follows; the pre-tax amount is included in net gain on sales and calls of securities and writedown of securities, the tax expense amount is included in income tax expense and the after tax amount is included in net (loss) income.

Regulatory_Matters

Regulatory Matters	12 Months Ended
	Dec. 31, 2014
Banking and Thrift [Abstract]
Regulatory Matters	NOTE 16 - REGULATORY MATTERS
	The Bank is 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 Bank’s financial statements. Under capital adequacy guidelines and the regulatory framework for prompt corrective action, the Bank must meet specific capital guidelines that involve quantitative measures of the Bank’s assets, liabilities and certain off-balance sheet items as calculated under regulatory accounting practices. The Bank’s capital amounts and classification are also subject to qualitative judgments by the regulators about components, risk weightings and other factors.
	Quantitative measures established by regulation to ensure capital adequacy require the Bank to maintain minimum amounts and ratios (set forth in the table below) of total and Tier 1 capital (as defined in the regulations) to risk-weighted assets (as defined), and of Tier 1 capital (as defined) to average assets (as defined). Management believes, as of December 31, 2014 and 2013, that the Bank meets all capital adequacy requirements to which it is subject.
	As of December 31, 2014 and 2013, the most recent notification from the FDIC categorized the Bank as well capitalized under the regulatory framework for prompt corrective action. To be categorized as well capitalized the Bank must maintain minimum total risk-based, Tier 1 risk-based and Tier 1 leverage ratios as set forth in the table. There are no conditions or events since that notification that management believes have changed the institution’s category.
	The Bank’s actual capital amounts and ratios are also presented in the table.
		Actual					For Capital					To Be Well
							Adequacy Purposes					Capitalized Under
												Prompt Corrective
												Action Provisions
		Amount		Ratio			Amount		Ratio			Amount		Ratio
							(Dollars In Thousands)
	As of December 31, 2014:
	Total Capital (to Risk Weighted Assets)	$	22,153		21.9	%	$	8,086		8	%	$	10,108		10	%
	Tier 1 Capital (to Risk Weighted Assets)		21,398		21.2			4,043		4			6,065		6
	Tier 1 Capital (to Average Assets)		21,398		11.7			7,347		4			9,183		5
	As of December 31, 2013:
	Total Capital (to Risk Weighted Assets)		13,399		13.5			7,944		8			9,929		10
	Tier 1 Capital (to Risk Weighted Assets)		12,650		12.7			3,972		4			5,958		6
	Tier 1 Capital (to Average Assets)		12,650		7.5			6,759		4			8,449		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.

Reclassification

Reclassification	12 Months Ended
	Dec. 31, 2014
Equity [Abstract]
Reclassification	NOTE 17 - RECLASSIFICATION
	Certain amounts in the 2013 consolidated financial statements have been reclassified to be consistent with the current period presentation.

Condensed_Parent_Company_Finan

Condensed Parent Company Financial Statements	12 Months Ended
	Dec. 31, 2014
Condensed Financial Information of Parent Company Only Disclosure [Abstract]
Condensed Parent Company Financial Statements	NOTE 18 – CONDENSED PARENT COMPANY FINANCIAL STATEMENTS
	The condensed balance sheets of the parent company only are as follows:
	Pilgrim Bancshares, Inc.
	BALANCE SHEETS
				At December 31,
				2014				2013
				(In Thousands)
	ASSETS
	Noninterest bearing deposit in the Bank			$	8,380			$	—
	Loan to the ESOP				1,719				—
	Investment in subsidiary				21,347				12,437
	Other assets				189				67
	Total assets			$	31,635			$	12,504
	LIABILITIES AND STOCKHOLDERS’ EQUITY
	Other liabilities			$	33			$	—
	Stockholders’ equity				31,602				12,504
	Total liabilities and stockholders’ equity			$	31,635			$	12,504
	The condensed statements of net (loss) income of the parent company only are as follows:
	Pilgrim Bancshares, Inc.
	STATEMENTS OF (LOSS) INCOME
		Years Ended December 31,
		2014				2013
		(In Thousands)
	Interest income from ESOP loan	$	13			$	—
	Chartitable foundation contribution		725				—
	Other noninterest expense		31				—
	Loss before income tax benefit and equity in undistributed net Income of the Bank		(743	)			—
	Income tax benefit		(189	)			—
	Loss before equity in undistributed net income of subsidiary		(554	)			—
	Equity in undistributed net income of subsidiary		435				368
	Net (loss) income	$	(119	)		$	368
	The condensed statements of cash flows of the parent company only are as follows:
	Pilgrim Bancshares, Inc.
	STATEMENTS OF CASH FLOWS
		Years Ended December 31,
		2014				2013
		(In Thousands)
	Cash flows from operating activities:
	Net (loss) income	$	(119	)		$	368
	Adustments to reconcile net loss to net cash provided by operating activities:
	Repayment of principal on ESOP loan		79				—
	Equity in undistributed income of subsidiary		(435	)			(368	)
	Contribution of common stock to Pilgrim Bank Foundation		655				—
	Deferred tax benefit		(182	)			—
	Decrease in other assets		60				—
	Increase in other liabilities		33				—
	Net cash provided by operating activities		91				—
	Cash flows from investing activities:
	Capital contribution to Pilgrim Bank		(10,049	)			—
	Loan to ESOP		(1,798	)			—
	Net cash used by investing activities		(11,847	)			—
	Cash flows from financing activities:
	Net proceeds from issuance of common stock		20,136				—
	Net cash provided by financing activities		20,136				—
	Net change in cash and cash equivalents		8,380				—
	Cash and cash equivalents at beginning of period		—				—
	Cash and cash equivalents at end of period	$	8,380			$	—

Quarterly_Data_Unaudited

Quarterly Data (Unaudited)	12 Months Ended
	Dec. 31, 2014
Quarterly Financial Information Disclosure [Abstract]
Quarterly Data (Unaudited)	NOTE 19 - QUARTERLY DATA (UNAUDITED)
	A summary of consolidated operating results on a quarterly basis is as follows:
		Years Ended December 31,
		2014									2013
		Fourth			Third		Second		First		Fourth			Third		Second		First
		Quarter			Quarter		Quarter		Quarter		Quarter			Quarter		Quarter		Quarter
			(In Thousands)
	Interest and dividend income	$	1,491		$	1,489	$	1,470	$	1,543	$	1,515		$	1,513	$	1,521	$	1,414
	Interest expense		259			273		272		262		273			289		301		312
	Net interest and dividend income		1,232			1,216		1,198		1,281		1,242			1,224		1,220		1,102
	Provision for loan losses		—			—		—		—		(165	)		36		93		36
	Net interest and dividend income, after provision for loan losses		1,232			1,216		1,198		1,281		1,407			1,188		1,127		1,066
	Total noninterest income		131			128		217		139		(126	)		121		169		187
	Total noninterest expense		2,095			1,144		1,147		1,209		1,150			1,123		1,145		1,193
	(Loss) income before income taxes		(732	)		200		268		211		131			186		151		60
	(Benefit) provision for income taxes		(181	)		69		93		85		40			61		47		12
	Net (loss) income	$	(551	)	$	131	$	175	$	126	$	91		$	125	$	104	$	48

Accounting_Policies_Policies

Accounting Policies (Policies)	12 Months Ended
	Dec. 31, 2014
Accounting Policies [Abstract]
Use of Estimates	USE OF ESTIMATES:
	In preparing consolidated financial statements in conformity with accounting principles generally accepted in the United States of America, management is required to make estimates and assumptions that affect the reported amounts of assets and liabilities as of the date of the consolidated balance sheets 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 change in the near term relate to the determination of the allowance for loan losses, impairment of securities and the valuation of deferred tax assets.
Basis of Presentation	BASIS OF PRESENTATION:
	The consolidated financial statements include the accounts of the Company and its wholly-owned subsidiary, the Bank, and the Bank’s wholly-owned subsidiaries, 48 South Main Street Corporation, which was formed to hold securities for its own account; 40 South Main Street Realty Trust, which was formed to hold our main office, and 800 CJC Realty Corporation, which was formed to invest in and develop residential and commercial property. All significant intercompany accounts and transactions have been eliminated in consolidation.
Cash and Cash Equivalents	CASH AND CASH EQUIVALENTS:
	For purposes of reporting cash flows, cash and cash equivalents include cash on hand, cash items, due from banks and interest-bearing demand deposits with other banks.
	The Bank is required to maintain average balances on hand with the Federal Reserve Bank. At December 31, 2014, the reserve balance amounted to $753,000.
Securities	SECURITIES:
	Investments in debt securities are adjusted for amortization of premiums and accretion of discounts so as to approximate the interest method. Gains or losses on sales of investment securities are computed on a specific identification basis.
	The Company classifies debt and equity securities into one of three categories: held-to-maturity, available-for-sale, or trading. These security classifications may be modified after acquisition only under certain specified conditions. In general, securities may be classified as held-to-maturity only if the Company has the positive intent and ability to hold them to maturity. Trading securities are defined as those bought and held principally for the purpose of selling them in the near term. All other securities must be classified as available-for-sale.
		•		Held-to-maturity securities are measured at amortized cost in the consolidated balance sheets. Unrealized holding gains and losses are not included in earnings or in a separate component of stockholders’ equity. They are merely disclosed in the notes to the consolidated financial statements.
		•		Available-for-sale securities are carried at fair value on the consolidated balance sheets. Unrealized holding gains and losses are not included in earnings, but are reported as a net amount (less expected tax) in a separate component of stockholders’ equity until realized.
		•		Trading securities are carried at fair value on the consolidated balance sheets. Unrealized holding gains and losses for trading securities are included in earnings.
	For any debt security with a fair value less than its amortized cost basis, the Company will determine whether it has the intent to sell the debt security or whether it is more likely than not it will be required to sell the debt security before the recovery of its amortized cost basis. If either condition is met, the Company will recognize a full impairment charge to earnings. For all other debt securities that are considered other-than-temporarily impaired and do not meet either condition, the credit loss portion of impairment will be recognized in earnings as realized losses. The other-than-temporary impairment related to all other factors will be recorded in other comprehensive income.
	Declines in marketable equity securities below their cost that are deemed other than temporary are reflected in earnings as realized losses.
	As a member of the Federal Home Loan Bank of Boston (FHLB), the Company is required to invest in $100 par value stock of the FHLB. The FHLB capital structure mandates that members must own stock as determined by their Total Stock Investment Requirement which is the sum of a member’s Membership Stock Investment Requirement and Activity-Based Stock Investment Requirement. The Membership Stock Investment Requirement is calculated as 0.35% of a member’s Stock Investment Base, subject to a minimum investment of $10,000 and a maximum investment of $25,000,000. The Stock Investment Base is an amount calculated based on certain assets held by a member that are reflected on call reports submitted to applicable regulatory authorities. The Activity-Based Stock Investment Requirement is calculated as 3.0% for overnight advances, 4.0% for FHLB advances with original terms to maturity of two days to three months and 4.5% for other advances plus a percentage of advance commitments, and 0.25% of standby letters of credit issued by the FHLB. Management evaluates the Company’s investment in FHLB 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 as of December 31, 2014, management deems its investment in FHLB stock to be not other-than-temporarily impaired.
Loans	LOANS:
	Loans receivable that management has the intent and ability to hold until maturity or payoff are reported at their outstanding principal balances adjusted for amounts due borrowers on unadvanced loans, any charge-offs, the allowance for loan losses and any deferred fees or costs on originated loans, or unamortized premiums or discounts on purchased loans.
	Interest on loans is recognized on a simple interest basis.
	Loan origination and commitment fees and certain direct origination costs are deferred, and the net amount amortized as an adjustment of the related loan’s yield. The Company is amortizing these amounts over the contractual lives of the related loans.
	Residential real estate loans are generally placed on nonaccrual when reaching 90 days past due or in process of foreclosure. All closed-end consumer loans 90 days or more past due and any equity line in the process of foreclosure are placed on nonaccrual status. Secured consumer loans are written down to realizable value and unsecured consumer loans are charged off upon reaching 120 or 180 days past due depending on the type of loan. Commercial real estate loans and commercial business loans and leases which are 90 days or more past due are generally placed on nonaccrual status, unless secured by sufficient cash or other assets immediately convertible to cash. When a loan has been placed on nonaccrual status, previously accrued and uncollected interest is reversed against interest on loans. A loan can be returned to accrual status when collectibility of principal is reasonably assured and the loan has performed for a period of time, generally six months.
	Cash receipts of interest income on impaired loans is credited to principal to the extent necessary to eliminate doubt as to the collectibility 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 and is based upon management’s periodic review of the collectibility of the loans in light of historical experience, the nature and volume of the loan portfolio, adverse situations that may affect the borrower’s ability to repay, estimated value of any underlying collateral and prevailing economic conditions. This evaluation is inherently subjective as it requires estimates that are susceptible to significant revision as more information becomes available.
	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, commercial real estate, construction, commercial 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 the years ended December 31, 2014 and 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: The Company generally does not originate loans with a loan-to-value ratio greater than 80 percent and does not grant subprime loans. All loans in this segment are 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 and multi-family real estate: Loans in this segment are primarily income-producing properties throughout Eastern Massachusetts, specifically the South Shore. 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 periodically obtains rent rolls and continually monitors the cash flows of these loans.
	Construction loans: Loans in this segment include land, speculative residential properties, investment multifamily, rehab to permanent investment properties and owner occupied residential properties. Payment is derived from sale of the property or long term rental cash flows once converted to permanent financing. Credit risk is affected by cost overruns, time to sell at an adequate price, vacancies and market conditions.
	Commercial loans: Loans in this segment are made to businesses, are generally secured by assets of the business and are primarily guaranteed by the United States Government. Repayment is expected from the cash flows of the business. A weakened economy, and resultant decreased consumer spending, will have an effect on the credit quality in this segment.
	Consumer loans: Loans in this segment are primarily secured by automobiles and repayment is dependent on the credit quality of the individual borrower.
	Allocated Component:
	The allocated component relates to loans that are classified as impaired. Impairment is measured on a loan by loan basis for commercial, commercial real estate and construction loans by either the present value of expected future cash flows discounted at the loan’s effective interest rate or the fair value of the collateral if the loan is collateral dependent. An allowance is established when the discounted cash flows (or collateral value) of the impaired loan are lower than the carrying value of that loan. Large groups of smaller balance homogeneous loans are collectively evaluated for impairment. Accordingly, the Company does not separately identify individual consumer and residential real estate loans for impairment disclosures, unless such loans are subject to a troubled debt restructuring agreement.
	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 on a temporary or permanent basis. When a loan is modified and a concession is made to a borrower experiencing financial difficulty, the modification is considered a troubled debt restructuring (“TDR”). All TDRs are initially classified as impaired.
	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.
Premises and Equipment	PREMISES AND EQUIPMENT:
	Land is stated at cost. Premises and equipment are stated at cost, less accumulated depreciation and amortization. Cost and related allowances for depreciation and amortization of premises and equipment retired or otherwise disposed of are removed from the respective accounts with any gain or loss included in income or expense. Depreciation and amortization are calculated principally on a straight-line basis over the estimated useful lives of the assets. Useful lives are dependent upon the nature and condition of the asset and range from one year to 40 years.
Other Real Estate Owned and In-Substance Foreclosures	OTHER REAL ESTATE OWNED AND IN-SUBSTANCE FORECLOSURES:
	Other real estate owned includes properties acquired through foreclosure and properties classified as in-substance foreclosures in accordance with ASC 310-40, “Receivables - Troubled Debt Restructuring by Creditors.” These properties are carried at their estimated fair value, less estimated selling costs. Any writedown from cost to estimated fair value required at the time of foreclosure or classification as in-substance foreclosure is charged to the allowance for loan losses. Expenses incurred in connection with maintaining these assets, subsequent writedowns and gains or losses recognized upon sale are included in other expense.
	In accordance with ASC 310-10-35, “Receivables - Overall - Subsequent Measurement,” 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.
Bank-Owned Life Insurance	BANK-OWNED LIFE INSURANCE:
	The Company has purchased insurance policies on the lives of certain directors, executive officers and employees. Bank-owned life insurance policies are reflected on the consolidated balance sheets at cash surrender value. Changes in net cash surrender value of the policies, as well as insurance proceeds received, are reflected in non-interest income on the consolidated statements of income and are not subject to income taxes.
Advertising	ADVERTISING:
	The Company directly expenses costs associated with advertising as they are incurred.
Income Taxes	INCOME TAXES:
	The Company recognizes income taxes under the asset and liability method. Under this method, deferred tax assets and liabilities are established for the temporary differences between the accounting basis and the tax basis of the Company’s assets and liabilities at enacted tax rates expected to be in effect when the amounts related to such temporary differences are realized or settled.
Fair Values of Financial Instruments	FAIR VALUES OF FINANCIAL INSTRUMENTS:
	Accounting Standards Codification (ASC) 825, “Financial Instruments,” requires that the Company disclose estimated fair values for its financial instruments. Fair value methods and assumptions used by the Company in estimating its fair value disclosures are as follows:
	Cash and cash equivalents: The carrying amounts reported in the consolidated balance sheets for cash and cash equivalents approximate those assets’ fair values.
	Interest-bearing time deposits with other banks: The fair value of interest-bearing time deposits with other banks was determined by discounting the cash flows associated with these instruments using current market rates for deposits with similar characteristics.
	Securities: Fair values for securities 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.
	Loans receivable: 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 by discounting the future cash flows, using interest rates currently being offered for loans with similar terms to borrowers of similar credit quality.
	Accrued interest receivable: The carrying amount of accrued interest receivable approximates its fair value.
	Deposit liabilities: The fair values disclosed for demand deposits, regular savings, NOW accounts, and money market accounts are equal to the amount payable on demand at the reporting date (i.e., their carrying amounts). Fair values for certificates of deposit 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 time deposits.
	Federal Home Loan Bank advances: Fair values for Federal Home Loan Bank advances are estimated using a discounted cash flow technique that applies interest rates currently being offered on advances to a schedule of aggregated expected monthly maturities on Federal Home Loan Bank advances.
	Off-balance sheet instruments: The fair value of commitments to originate loans is estimated using the fees currently charged to enter similar agreements, taking into account the remaining terms of the agreements and the present creditworthiness of the counterparties. For fixed-rate loan commitments and the unadvanced portion of loans, fair value also considers the difference between current levels of interest rates and the committed rates.
Pension Plan	PENSION PLAN:
	The Company provided pension benefits for its employees through participation in the Co-Operative Banks’ Employees Retirement Association. The Plan was frozen as of April 30, 2014 and therefore there are no future funding requirements or obligation on the part of the Company.
Earnings per share (EPS)	EARNINGS PER SHARE (EPS):
	When presented, basic EPS is computed by dividing income available to common stockholders by the weighted-average number of common shares outstanding for the period. Diluted EPS reflects the potential dilution that could occur if securities or other contracts to issue common stock were exercised or converted into common stock or resulted in the issuance of common stock that then shared in the earnings of the entity. Because the formation of the Company was completed on October 10, 2014, earnings per share data is not meaningful for current and prior comparative periods and is therefore not presented.
Recent Accounting Pronouncements	RECENT ACCOUNTING PRONOUNCEMENTS:
	In April 2014, the Financial Accounting Standards Board (FASB) issued Accounting Standards Update (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 in the first quarter of 2015 with calendar year ends. The adoption of this guidance is not expected to have an impact on the Company’s 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 amendments in this update are effective for annual reporting periods beginning after December 15, 2017, and interim periods within annual periods beginning after December 15, 2018. Early application is permitted, but no earlier than an annual reporting period beginning after December 15, 2016, including interim periods within that reporting period. The Company is currently reviewing this ASU to determine if it will have an 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 for a public business entity is prohibited; however, all other entities may elect to apply the requirements for interim periods beginning after December 15, 2014. The adoption of this guidance is not expected to have a material impact on the Company’s 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 adoption of this guidance is not expected to have a material impact on the Company’s 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 ending after December 15, 2016, and interim periods, beginning after December 15, 2016. Early adoption is permitted as of the beginning of an annual period. 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 2014-14, “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 ending after December 15, 2015, and interim periods, beginning after December 15, 2015. 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 or 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 of 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 results of operations or financial position.
	In August 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 beginning after December 15, 2015, and interim periods within fiscal years beginning after December 15, 2016. Early adoption is permitted. The adoption of this guidance is not expected to have an impact on the Company’s results of operations or financial position.
	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 Company anticipates that the adoption of this ASU will not have an impact on its results of operations or financial position.
	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 results of operations or financial position.
Fair Value Measurements	In accordance with ASC 820-10, the Company groups its financial assets and financial liabilities measured at fair value in three levels, based on the markets in which the assets and liabilities are traded and the reliability of the assumptions used to determine fair value.
	Level 1 - Valuations for assets and liabilities traded in active exchange markets, such as the New York Stock Exchange. Level 1 also includes U.S. Treasury, other U.S. Government and agency mortgage-backed securities that are traded by dealers or brokers in active markets. Valuations are obtained from readily available pricing sources for market transactions involving identical assets or liabilities.
	Level 2 - Valuations for assets and liabilities traded in less active dealer or broker markets. Valuations are obtained from third party pricing services for identical or comparable assets or liabilities.
	Level 3 - Valuations for assets and liabilities that are derived from other methodologies, including option pricing models, discounted cash flow models and similar techniques, are not based on market exchange, dealer, or broker traded transactions. Level 3 valuations incorporate certain assumptions and projections in determining the fair value assigned to such assets and liabilities.

Investments_in_Securities_Tabl

Investments in Securities (Tables)	12 Months Ended
	Dec. 31, 2014
Investments, Debt and Equity Securities [Abstract]
Schedule of Amortized Cost and Fair Values of Securities	The amortized cost of securities and their approximate fair values are as follows :
			Amortized		Gross		Gross			Fair
			Cost		Unrealized		Unrealized			Value
			Basis		Gains		Losses
			(In Thousands)
	Available-for-sale securities:
	December 31, 2014 :
	Debt securities issued by U.S. government corporations and agencies		$	1,985	$	7	$	17		$	1,975
	Debt securities issued by states of the United States and political subdivisions of the states			3,258		5		30			3,233
	Mortgage-backed securities			6,606		24		71			6,559
			$	11,849	$	36	$	118		$	11,767
	December 31, 2013:
	Debt securities issued by the U.S. Treasury and other U.S. government corporations and agencies		$	2,460	$	—	$	138		$	2,322
	Debt securities issued by states of the United States and political subdivisions of the states			4,447		45		120			4,372
	Mortgage-backed securities			6,148		27		155			6,020
	Mutual funds			782		—		—			782
			$	13,837	$	72	$	413		$	13,496
			Amortized		Gross		Gross			Fair
			Cost		Unrealized		Unrealized			Value
			Basis		Gains		Losses
			(In Thousands)
	Held-to-maturity securities:
	December 31, 2014 :
	Mortgage-backed securities		$	149	$	47	$	—		$	196
			$	149	$	47	$	—		$	196
	December 31, 2013:
	Debt securities issued by the U.S. Treasury and other U.S. government corporations and agencies		$	26	$	—	$	1		$	25
	Mortgage-backed securities			228		43		12			259
			$	254	$	43	$	13		$	284
Scheduled Maturities of Debt Securities	The scheduled maturities of debt securities were as follows as of December 31, 2014:
			Available-For-Sale		Held-To-Maturity
			Fair		Amortized		Fair
			Value		Cost		Value
					Basis
			(In Thousands)
	Due within one year		$	369	$	—	$	—
	Due after one year through five years			1,346		—		—
	Due after five years through ten years			1,830		—		—
	Due after ten years			1,663		—		—
	Mortgage-backed securities			6,559		149		196
			$	11,767	$	149	$	196
Schedule of Aggregate Fair Value and Unrealized Losses of Securities	The aggregate fair value and unrealized losses of securities that have been in a continuous unrealized loss position for less than twelve months and for twelve months or more are as follows:
			Less than 12 Months				12 Months or Longer					Total
			Fair		Unrealized		Fair			Unrealized		Fair		Unrealized
			Value		Losses		Value			Losses		Value		Losses
			(In Thousands)
	December 31, 2014 :
	Debt securities issued by U.S. government corporations and agencies		$	—	$	—	$	1,485		$	17	$	1,485	$	17
	Debt securities issued by states of the United States and political subdivisions of the states			950		8		1,232			22		2,182		30
	Mortgage-backed securities			1,411		3		2,641			68		4,052		71
	Total temporarily impaired securities			2,361		11		5,358			107		7,719		118
	Other-than-temporarily impaired securities:
	Mortgage-backed securities			—		—		3			—		3		—
	Total temporarily impaired and other-than-temporarily impaired securities		$	2,361	$	11	$	5,361		$	107	$	7,722	$	118
	December 31, 2013:
	Debt securities issued by the U.S. Treasury and other U.S. government corporations and agencies		$	2,322	$	138	$	25		$	1	$	2,347	$	139
	Debt securities issued by states of the United States and political subdivisions of the states			686		55		926			65		1,612		120
	Mortgage-backed securities			2,701		75		1,058			79		3,759		154
	Total temporarily impaired securities			5,709		268		2,009			145		7,718		413
	Other-than-temporarily impaired securities:
	Mortgage-backed securities			—		—		7			13		7		13
	Total temporarily impaired and other-than-temporarily impaired securities		$	5,709	$	268	$	2,016		$	158	$	7,725	$	426
Schedule of Other-than-Temporary Impairment Losses on Securities	The following table summarizes other-than-temporary impairment losses on securities for the years ended December 31, 2014 and 2013:
			December 31,
			2014		2013
			Non-Agency		Mutual		Non-Agency
			Mortgage-Backed		Funds		Mortgage-Backed
			Securities				Securities
			(In Thousands)
	Total other-than-temporary impairment losses		$	12	$	218	$	37
	Less: unrealized other-than-temporary losses recognized in other comprehensive income (1)			—		—		(8	)
	Net impairment losses recognized in earnings (2)		$	12	$	218	$	29
	-1	Represents the noncredit component of the other-than-temporary impairment on the securities.
	-2	Represents the credit component of the other-than-temporary impairment on securities.

Loans_Tables

Loans (Tables)	12 Months Ended
	Dec. 31, 2014
Receivables [Abstract]
Schedule of Loans	Loans consisted of the following:
		December 31,
		2014			2013
		(In Thousands)
	Real estate loans:
	One-to four- family residential	$	96,440		$	92,383
	Commercial		17,401			19,380
	Multi-family		10,171			9,882
	Home equity loans and lines of credit		2,854			3,976
	Construction		12,072			3,513
	Commercial and industrial loans		3,012			2,506
	Consumer loans:
	Consumer line of credit		21			19
	Other consumer loans		2,446			1,919
			144,417			133,578
	Net deferred loan origination fees, costs and discounts		100			87
	Allowance for loan losses		(743	)		(742	)
	Net loans	$	143,774		$	132,923
Schedule of Allowance for Loan Losses	The following tables set forth information regarding the allowance for loan losses as of and for the years ended December 31:
		Real Estate:																		Consumer
		One- to			Commercial			Multi-family			Home Equity			Construction			Commercial			Consumer			Other			Unallocated			Total
		four-family									Loans and						and			Line of			Consumer
		Residential									Lines of						Industrial			Credit
											Credit						Loans
		(In Thousands)
	December 31, 2014 :
	Allowance for loan losses:
	Beginning balance	$	323		$	195		$	51		$	30		$	49		$	16		$	1		$	20		$	57		$	742
	Charge-offs		—			—			—			—			—			—			—			—			—			—
	Recoveries		1			—			—			—			—			—			—			—			—			1
	Provision (benefit)		38			(61	)		(15	)		(3	)		72			(8	)		—			—			(23	)		—
	Ending balance	$	362		$	134		$	36		$	27		$	121		$	8		$	1		$	20		$	34		$	743
	Ending balance:
	Individually evaluated for impairment	$	37		$	—		$	—		$	—		$	—		$	—		$	—		$	—		$	—		$	37
	Ending balance:
	Collectively evaluated for impairment		325			134			36			27			121			8			1			20			34			706
	Total allowance for loan losses ending balance	$	362		$	134		$	36		$	27		$	121		$	8		$	1		$	20		$	34		$	743
	Loans:
	Ending balance:
	Individually evaluated for impairment	$	6,572		$	695		$	—		$	53		$	—		$	—		$	—		$	—		$	—		$	7,320
	Ending balance:
	Collectively evaluated for impairment		89,868			16,706			10,171			2,801			12,072			3,012			21			2,446			—			137,097
	Total loans ending balance	$	96,440		$	17,401		$	10,171		$	2,854		$	12,072		$	3,012		$	21		$	2,446		$	—		$	144,417
		Real Estate:																		Consumer
		One- to			Commercial			Multi-family			Home Equity			Construction			Commercial			Consumer			Other			Unallocated			Total
		four-family									Loans and						and			Line of			Consumer
		Residential									Lines of						Industrial			Credit
											Credit						Loans
		(In Thousands)
	December 31, 2013:
	Allowance for loan losses:
	Beginning balance	$	362		$	152		$	35		$	46		$	50		$	7		$	2		$	37		$	97		$	788
	Charge-offs		(48	)		—			—			—			—			—			—			(3	)		—			(51	)
	Recoveries		—			—			—			—			—			—			—			5			—			5
	Provision (benefit)		9			43			16			(16	)		(1	)		9			(1	)		(19	)		(40	)		—
	Ending balance	$	323		$	195		$	51		$	30		$	49		$	16		$	1		$	20		$	57		$	742
	Ending balance:
	Individually evaluated for impairment	$	80		$	—		$	—		$	—		$	—		$	—		$	—		$	—		$	—		$	80
	Ending balance:
	Collectively evaluated for impairment		243			195			51			30			49			16			1			20			57			662
	Total allowance for loan losses ending balance	$	323		$	195		$	51		$	30		$	49		$	16		$	1		$	20		$	57		$	742
	Loans:
	Ending balance:
	Individually evaluated for impairment	$	6,126		$	703		$	—		$	—		$	—		$	—		$	—		$	—		$	—		$	6,829
	Ending balance:
	Collectively evaluated for impairment		86,257			18,677			9,882			3,976			3,513			2,506			19			1,919			—			126,749
	Total loans ending balance	$	92,383		$	19,380		$	9,882		$	3,976		$	3,513		$	2,506		$	19		$	1,919		$	—		$	133,578
Schedule of Nonaccrual Loans and Past-Due Loans	The following tables set forth information regarding nonaccrual loans and past-due loans:
		30-59			60-89			90 Days			Total			Total			Total			90 Days or			Nonaccrual
		Days			Days			or More			Past Due			Current						More Past			Loans
								Past Due												Due
																				and Accruing
		(In Thousands)
	December 31, 2014:
	Real estate loans:
	One- to four-family residential	$	728		$	—		$	1,393		$	2,121		$	94,319		$	96,440		$	—		$	1,419
	Commercial		—			—			—			—			17,401			17,401			—			—
	Multi-family		938			—			—			938			9,233			10,171			—			—
	Home equity loans and lines of credit		—			53			—			53			2,801			2,854			—			—
	Construction		—			—			—			—			12,072			12,072			—			—
	Commercial and industrial loans		—			—			—			—			3,012			3,012			—			—
	Consumer loans:
	Consumer line of credit		—			—			—			—			21			21			—			—
	Other consumer		9			—			—			9			2,437			2,446			—			—
	Total	$	1,675		$	53		$	1,393		$	3,121		$	141,296		$	144,417		$	—		$	1,419
	December 31, 2013:
	Real estate loans:
	One- to four-family residential	$	—		$	240		$	2,075		$	2,315		$	90,068		$	92,383		$	—		$	2,344
	Commercial		—			—			—			—			19,380			19,380			—			—
	Multi-family		—			—			—			—			9,882			9,882			—			—
	Home equity loans and lines of credit		—			—			—			—			3,976			3,976			—			8
	Construction		—			—			—			—			3,513			3,513			—			—
	Commercial and industrial loans		—			—			—			—			2,506			2,506			—			—
	Consumer loans:
	Consumer line of credit		—			—			—			—			19			19			—			—
	Other consumer		—			—			—			—			1,919			1,919			—			—
	Total	$	—		$	240		$	2,075		$	2,315		$	131,263		$	133,578		$	—		$	2,352
Schedule of Impaired Loan	Information about loans that meet the definition of an impaired loan in ASC 310-10-35 is as follows:
		Recorded			Unpaid			Related			Average			Interest
		Investment			Principal			Allowance			Recorded			Income
					Balance						Investment			Recognized
		(In Thousands)
	December 31, 2014:
	With no related allowance recorded:
	Real estate loans:
	One- to four-family residential	$	5,991		$	5,991		$	—		$	5,586		$	226
	Commercial		695			695			—			699			50
	Home equity line of credit		53			53			—			8			—
	Total impaired with no related allowance	$	6,739		$	6,739		$	—		$	6,293		$	276
	With an allowance recorded:
	Real estate loans:
	One- to four-family residential	$	581		$	581		$	37		$	589		$	22
	Commercial		—			—			—			—			—
	Home equity line of credit		—			—			—			—			—
	Total impaired with an allowance recorded	$	581		$	581		$	37		$	589		$	22
	Total
	Real estate loans:
	One- to four-family residential	$	6,572		$	6,572		$	37		$	6,175		$	248
	Commercial		695			695			—			699			50
	Home equity line of credit		53			53			—			8			—
	Total impaired loans	$	7,320		$	7,320		$	37		$	6,882		$	298
	December 31, 2013:
	With no related allowance recorded:
	Real estate loans:
	One- to four-family residential	$	4,143		$	4,143		$	—		$	4,150		$	168
	Commercial		703			703			—			706			58
	Total impaired with no related allowance	$	4,846		$	4,846		$	—		$	4,856		$	226
	With an allowance recorded:
	Real estate loans:
	One- to four-family residential	$	1,983		$	1,983		$	80		$	1,997		$	103
	Commercial		—			—			—			—			—
	Total impaired with an allowance recorded	$	1,983		$	1,983		$	80		$	1,997		$	103
	Total
	Real estate loans:
	One- to four-family residential	$	6,126		$	6,126		$	80		$	6,147		$	271
	Commercial		703			703			—			706			58
	Total impaired loans	$	6,829		$	6,829		$	80		$	6,853		$	329
Schedule of Loans by Risk Rating	The following tables present the Company’s loans by risk rating:
		Real Estate:																		Consumer
		One- to			Commercial			Multi-			Home Equity			Construction			Commercial			Consumer			Other			Total
		four-family						family			Loans and						and			Line of			Consumer
		Residential									Lines of						Industrial			Credit
											Credit						Loans
		(In Thousands)
	December 31, 2014:
	Grade:
	Pass	$	—		$	16,706		$	9,233		$	—		$	12,072		$	3,012		$	—		$	—		$	41,023
	Special mention		2,417			695			—			53			—			—			—			—			3,165
	Substandard		1,393			—			938			—			—			—			—			—			2,331
	Loans not formally rated		92,630			—			—			2,801			—			—			21			2,446			97,898
	Total	$	96,440		$	17,401		$	10,171		$	2,854		$	12,072		$	3,012		$	21		$	2,446		$	144,417
	December 31, 2013:
	Grade:
	Pass	$	—		$	17,829		$	8,932		$	—		$	3,513		$	2,506		$	—		$	—		$	32,780
	Special mention		302			132			—			—			—			—			—			—			434
	Substandard		4,227			1,419			950			8			—			—			—			—			6,604
	Loans not formally rated		87,854			—			—			3,968			—			—			19			1,919			93,760
	Total	$	92,383		$	19,380		$	9,882		$	3,976		$	3,513		$	2,506		$	19		$	1,919		$	133,578
Schedule of Troubled Debt Restructuring, Current Period	The following tables set forth information regarding loans modified as TDRs during the years ended December 31, 2014 and 2013:
		Number of			Pre-Modification			Post-Modification
		Contracts			Outstanding Recorded			Outstanding Recorded
					Investment			Investment
		(Dollars In Thousands)
	December 31, 2014:
	Troubled Debt Restructurings:
	Real estate loans:
	One- to four- family residential		1		$	521		$	521
	Home equity loans and lines of credit		1			53			53
			2		$	574		$	574
		Number of			Pre-Modification			Post-Modification
		Contracts			Outstanding Recorded			Outstanding Recorded
					Investment			Investment
		(Dollars In Thousands)
	December 31, 2013:
	Troubled Debt Restructurings:
	Real estate loans:
	One- to four- family residential		1		$	1,883		$	1,883
			1		$	1,883		$	1,883
	The following tables provide information on how loans were modified as TDRs:
		Rate			Interest Only			Rate Reduction and
		Reduction			Period			Interest Only Period
		(In Thousands)
	December 31, 2014:
	Real estate loans:
	One- to four- family residential	$			$	521		$	—
	Home equity loans and lines of credit		—			53			—
	Total	$	—		$	574		$	—
	December 31, 2013:
	Real estate loans:
	One- to four- family residential	$	—		$	1,883		$	—
	Total	$	—		$	1,883		$	—

Premises_and_Equipment_Tables

Premises and Equipment (Tables)	12 Months Ended
	Dec. 31, 2014
Property, Plant and Equipment [Abstract]
Summary of Premises and Equipment	The following is a summary of premises and equipment:
		December 31,
		2014			2013
		(In Thousands)
	Land	$	864		$	864
	Buildings and improvements		5,373			5,356
	Furniture and equipment		2,196			2,084
			8,433			8,304
	Accumulated depreciation and amortization		(3,024	)		(2,733	)
		$	5,409		$	5,571

Investment_in_Real_Estate_Tabl

Investment in Real Estate (Tables)	12 Months Ended
	Dec. 31, 2014
Real Estate [Abstract]
Summary of Investment in Real Estate	The following is a summary of investment in real estate:
		December 31,
		2014			2013
		(In Thousands)
	Land	$	453		$	453
	Buildings and improvements		1,489			1,489
			1,942			1,942
	Accumulated depreciation		(319	)		(280	)
		$	1,623		$	1,662

Deposits_Tables

Deposits (Tables)	12 Months Ended
	Dec. 31, 2014
Banking and Thrift [Abstract]
Summary of Scheduled Maturities of Time Deposits	For time deposits as of December 31, 2014, the scheduled maturities for each of the following five years ended December 31 are:
		(In Thousands)
	2015	$	33,133
	2016		10,023
	2017		9,212
	2018		13,344
	2019		771
	Total	$	66,483

Federal_Home_Loan_Bank_Advance1

Federal Home Loan Bank Advances (Tables)	12 Months Ended
	Dec. 31, 2014
Banking and Thrift [Abstract]
Summary of Maturities of Advances from the FHLB	Maturities of advances from the FHLB for the years ending after December 31, 2014 are summarized as follows:
		(In Thousands)
	2015	$	5,000
		$	5,000

Income_Taxes_Tables

Income Taxes (Tables)	12 Months Ended
	Dec. 31, 2014
Income Tax Disclosure [Abstract]
Components of Income Tax Expense	The components of income tax expense are as follows:
		Years Ended
		December 31,
		2014			2013
		(In Thousands)
	Current:
	Federal	$	169		$	185
	State		38			48
			207			233
	Deferred:
	Federal		(220	)		322
	State		(49	)		(15	)
	Change in valuation allowance		128			(380	)
			(141	)		(73	)
	Total income tax expense	$	66		$	160
Summary of Differences between Statutory Federal Income Tax Rate and Effective Tax Rates	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
		% of			% of
		Income			Income
	Statutory federal income tax rate		(34.0	)%		34	%
	Increase (decrease) in tax rates resulting from:
	Tax-exempt income		(78.4	)		(9.2	)
	Expiration of capital loss carryforwards		—			72
	Other		8			1.4
	State tax, net of federal tax		(14.0	)		4.1
	Change in valuation allowance		244.2			(72.0	)
	Effective tax rates		125.8	%		30.3	%
Schedule of Gross Deferred Tax Assets and Gross Deferred Tax Liabilities	The Company had gross deferred tax assets and gross deferred tax liabilities as follows:
		December 31,
		2014			2013
		(In Thousands)
	Deferred tax assets:
	Allowance for loan losses	$	302		$	300
	Securities capital loss carryforwards		55			4
	Writedown of securities		15			100
	Interest on nonaccrual loans		31			21
	Net unrealized holding loss on available-for-sale securities		31			127
	Charitable contribution carryovers		290			—
	Gross deferred tax assets		724			552
	Valuation allowance		(129	)		(1	)
	Gross deferred tax assets after valuation allowance		595			551
	Deferred tax liabilities:
	Book basis in excess of tax basis of premises and equipment		(177	)		(186	)
	ESOP expense		(8	)		—
	Gross deferred tax liabilities		(185	)		(186	)
	Net deferred tax asset	$	410		$	365

Employee_Benefits_Tables

Employee Benefits (Tables)	12 Months Ended
	Dec. 31, 2014
Compensation and Retirement Disclosure [Abstract]
Schedule of Employee Defined Contribution Plans and Multi-Employer Pension Plans	The required disclosures are contained in the table below.
	Name of Plan:	The Defined Benefit Plan (Plan C) of the CBERA Retirement Program
	Plan’s Tax ID #:	04-6035593
	Plan Number:	334
	Plan Year End:	31-Dec-13
	Actuarial Valuation:	1-Jan-13
	FTAP Percentage:	117% (Green)
	(Funded Target Attainment Percentage)
	Employer Plan Year Contributions:	$88,000
		Did not exceed 5%
	Funding Improvement:	The Company was not subject to any specific minimum contributions other than amounts, determined by the Trustees of the plan, that maintain the funded status of the plan in accordance with the requirements of the Pension Protection Act (PPA) and the Employee Retirement Income Security Act (ERISA).
Schedule of Remaining Principal Balance Payable on ESOP Debt	The remaining principal balance on the ESOP debt as of December 31, 2014 is payable as follows:
	Years Ending	Amount
	December 31,
		(In Thousands)
	2015	$	37
	2016		38
	2017		39
	2018		40
	2019		42
	Thereafter		1,523
		$	1,719
Schedule of Shares Held by ESOP	Shares held by the ESOP are as follows as of December 31:
		2014
	Allocated		—
	Committed to be allocated		5,994
	Unallocated		173,813
	Shares held by ESOP		179,807

OffBalance_Sheet_Activities_Ta

Off-Balance Sheet Activities (Tables)	12 Months Ended
	Dec. 31, 2014
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Notional Amounts of Financial Instrument Liabilities of Off-Balance Sheet Credit Risk	Notional amounts of financial instrument liabilities whose contract amounts represent off-balance sheet credit risk are as follows:
		December 31,
		2014		2013
		(In Thousands)
	Commitments to originate loans	$	9,981	$	4,180
	Commitments to purchase loans		4,799		—
	Unadvanced funds on loans:
	Home equity lines of credit		3,389		3,848
	Construction loans		8,049		1,566
	Commercial lines of credit		1,517		1,771
	Consumer		104		141
		$	27,839	$	11,506

Fair_Value_Measurements_Tables

Fair Value Measurements (Tables)	12 Months Ended
	Dec. 31, 2014
Fair Value Disclosures [Abstract]
Summary of Assets Measured at Fair Value on a Recurring Basis	The following summarizes assets measured at fair value on a recurring basis as of December 31, 2014 and 2013:
		Fair Value Measurements at Reporting Date Using:
		Total		Quoted Prices in		Significant		Significant
				Active Markets		Other Observable		Unobservable
				for Identical		Inputs		Inputs
				Assets		Level 2		Level 3
				Level 1
		(In Thousands)
	December 31, 2014:
	Debt securities issued by U.S. government corporations and agencies	$	1,975	$	—	$	1,975	$	—
	Debt securities issued by states of the United States and political subdivisions of the states		3,233		—		3,233		—
	Mortgage-backed securities		6,559		—		6,559		—
	Totals	$	11,767	$	—	$	11,767	$	—
	December 31, 2013:
	Debt securities issued by the U.S. Treasury and other U.S. government corporations and agencies	$	2,322	$	—	$	2,322	$	—
	Debt securities issued by states of the United States and political subdivisions of the states		4,372		—		4,372		—
	Mortgage-backed securities		6,020		—		6,020		—
	Mutual funds		782		782		—		—
	Totals	$	13,496	$	782	$	12,714	$	—
Summary of Assets Measured at Fair Value on a Nonrecurring Basis	The following table presents assets carried on the consolidated balance sheet by caption and by level in the fair value hierarchy at December 31, 2014 and 2013 for which a nonrecurring change in fair value has been recorded:
		Fair Value Measurements at Reporting Date Using:
		Total		Quoted Prices		Significant		Significant
				in Active		Other		Unobservable
				Markets for		Observable		Inputs
				Identical Assets		Inputs		Level 3
				Level 1		Level 2
		(In Thousands)
	December 31, 2014:
	Impaired loans	$	544	$	—	$	—	$	544
	Totals	$	544	$	—	$	—	$	544
	December 31, 2013:
	Impaired loans	$	1,903	$	—	$	—	$	1,903
	Totals	$	1,903	$	—	$	—	$	1,903
Schedule of Estimated Fair Values of Financial Instruments Held or Issued for Purposes Other Than Trading	The estimated fair values of the Company’s financial instruments, all of which are held or issued for purposes other than trading, are as follows:
		December 31, 2014
		Carrying		Fair Value
		Amount		Level 1		Level 2		Level 3		Total
		(In Thousands)
	Financial assets:
	Cash and cash equivalents	$	18,295	$	18,295	$	—	$	—	$	18,295
	Interest-bearing time deposits with other banks		2,575		—		2,578		—		2,578
	Available-for-sale securities		11,767		—		11,767		—		11,767
	Held-to-maturity securities		149		—		196		—		196
	Federal Home Loan Bank stock		694		694		—		—		694
	Investment in The Co-operative Central Reserve Fund		384		384		—		—		384
	Loans, net		143,774		—		—		146,705		146,705
	Accrued interest receivable		447		447		—		—		447
	Financial liabilities:
	Deposits		151,010		—		151,638		—		151,638
	FHLB advances		5,000		—		5,006		—		5,006
		31-Dec-13
		Carrying		Fair Value
		Amount		Level 1		Level 2		Level 3		Total
		(In Thousands)
	Financial assets:
	Cash and cash equivalents	$	8,991	$	8,991	$	—	$	—	$	8,991
	Interest-bearing time deposits with other banks		4,511		—		4,518		—		4,518
	Available-for-sale securities		13,496		782		12,714		—		13,496
	Held-to-maturity securities		254		—		284		—		284
	Federal Home Loan Bank stock		667		667		—		—		667
	Investment in The Co-operative Central Reserve Fund		384		384		—		—		384
	Loans, net		132,923		—		—		134,272		134,272
	Accrued interest receivable		399		399		—		—		399
	Financial liabilities:
	Deposits		153,732		—		154,278		—		154,278
	FHLB advances		5,000		—		5,182		—		5,182

Other_Comprehensive_Income_Los1

Other Comprehensive Income (Loss) (Tables)	12 Months Ended
	Dec. 31, 2014
Equity [Abstract]
Components of Other Comprehensive Income (Loss)	The components of other comprehensive income (loss), included in equity are as follows:
		Years Ended December 31,
		2014			2013
		(In Thousands)
	Net unrealized holding gain (loss) on available-for-sale securities	$	330		$	(593	)
	Reclassification adjustment for net realized (gains) losses in net income (1)		(71	)		219
	Other comprehensive income (loss) before income tax effect		259			(374	)
	Income tax (expense) benefit		(96	)		136
	Other comprehensive income (loss), net of tax	$	163		$	(238	)
	Accumulated other comprehensive loss as of December 31, 2014 and 2013, consists of net unrealized holding losses on
	available-for-sale securities, net of taxes.
	(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 (loss) income as follows; the pre-tax amount is included in net gain on sales and calls of securities and writedown of securities, the tax expense amount is included in income tax expense and the after tax amount is included in net (loss) income.

Regulatory_Matters_Tables

Regulatory Matters (Tables)	12 Months Ended
	Dec. 31, 2014
Banking and Thrift [Abstract]
Schedule of Bank's Actual Capital Amounts and Ratios	The Bank’s actual capital amounts and ratios are also presented in the table.
		Actual					For Capital					To Be Well
							Adequacy Purposes					Capitalized Under
												Prompt Corrective
												Action Provisions
		Amount		Ratio			Amount		Ratio			Amount		Ratio
							(Dollars In Thousands)
	As of December 31, 2014:
	Total Capital (to Risk Weighted Assets)	$	22,153		21.9	%	$	8,086		8	%	$	10,108		10	%
	Tier 1 Capital (to Risk Weighted Assets)		21,398		21.2			4,043		4			6,065		6
	Tier 1 Capital (to Average Assets)		21,398		11.7			7,347		4			9,183		5
	As of December 31, 2013:
	Total Capital (to Risk Weighted Assets)		13,399		13.5			7,944		8			9,929		10
	Tier 1 Capital (to Risk Weighted Assets)		12,650		12.7			3,972		4			5,958		6
	Tier 1 Capital (to Average Assets)		12,650		7.5			6,759		4			8,449		5

Condensed_Parent_Company_Finan1

Condensed Parent Company Financial Statements (Tables)	12 Months Ended
	Dec. 31, 2014
Condensed Financial Information of Parent Company Only Disclosure [Abstract]
Condensed Balance Sheets of Parent Company	The condensed balance sheets of the parent company only are as follows:
	Pilgrim Bancshares, Inc.
	BALANCE SHEETS
				At December 31,
				2014				2013
				(In Thousands)
	ASSETS
	Noninterest bearing deposit in the Bank			$	8,380			$	—
	Loan to the ESOP				1,719				—
	Investment in subsidiary				21,347				12,437
	Other assets				189				67
	Total assets			$	31,635			$	12,504
	LIABILITIES AND STOCKHOLDERS’ EQUITY
	Other liabilities			$	33			$	—
	Stockholders’ equity				31,602				12,504
	Total liabilities and stockholders’ equity			$	31,635			$	12,504
Condensed Statements of Net (Loss) Income of Parent Company	The condensed statements of net (loss) income of the parent company only are as follows:
	Pilgrim Bancshares, Inc.
	STATEMENTS OF (LOSS) INCOME
		Years Ended December 31,
		2014				2013
		(In Thousands)
	Interest income from ESOP loan	$	13			$	—
	Chartitable foundation contribution		725				—
	Other noninterest expense		31				—
	Loss before income tax benefit and equity in undistributed net Income of the Bank		(743	)			—
	Income tax benefit		(189	)			—
	Loss before equity in undistributed net income of subsidiary		(554	)			—
	Equity in undistributed net income of subsidiary		435				368
	Net (loss) income	$	(119	)		$	368
Condensed Statements of Cash Flows of Parent Company	The condensed statements of cash flows of the parent company only are as follows:
	Pilgrim Bancshares, Inc.
	STATEMENTS OF CASH FLOWS
		Years Ended December 31,
		2014				2013
		(In Thousands)
	Cash flows from operating activities:
	Net (loss) income	$	(119	)		$	368
	Adustments to reconcile net loss to net cash provided by operating activities:
	Repayment of principal on ESOP loan		79				—
	Equity in undistributed income of subsidiary		(435	)			(368	)
	Contribution of common stock to Pilgrim Bank Foundation		655				—
	Deferred tax benefit		(182	)			—
	Decrease in other assets		60				—
	Increase in other liabilities		33				—
	Net cash provided by operating activities		91				—
	Cash flows from investing activities:
	Capital contribution to Pilgrim Bank		(10,049	)			—
	Loan to ESOP		(1,798	)			—
	Net cash used by investing activities		(11,847	)			—
	Cash flows from financing activities:
	Net proceeds from issuance of common stock		20,136				—
	Net cash provided by financing activities		20,136				—
	Net change in cash and cash equivalents		8,380				—
	Cash and cash equivalents at beginning of period		—				—
	Cash and cash equivalents at end of period	$	8,380			$	—

Quarterly_Data_Unaudited_Table

Quarterly Data (Unaudited) (Tables)	12 Months Ended
	Dec. 31, 2014
Quarterly Financial Information Disclosure [Abstract]
Unaudited Quarterly Financial Data	A summary of consolidated operating results on a quarterly basis is as follows:
		Years Ended December 31,
		2014									2013
		Fourth			Third		Second		First		Fourth			Third		Second		First
		Quarter			Quarter		Quarter		Quarter		Quarter			Quarter		Quarter		Quarter
			(In Thousands)
	Interest and dividend income	$	1,491		$	1,489	$	1,470	$	1,543	$	1,515		$	1,513	$	1,521	$	1,414
	Interest expense		259			273		272		262		273			289		301		312
	Net interest and dividend income		1,232			1,216		1,198		1,281		1,242			1,224		1,220		1,102
	Provision for loan losses		—			—		—		—		(165	)		36		93		36
	Net interest and dividend income, after provision for loan losses		1,232			1,216		1,198		1,281		1,407			1,188		1,127		1,066
	Total noninterest income		131			128		217		139		(126	)		121		169		187
	Total noninterest expense		2,095			1,144		1,147		1,209		1,150			1,123		1,145		1,193
	(Loss) income before income taxes		(732	)		200		268		211		131			186		151		60
	(Benefit) provision for income taxes		(181	)		69		93		85		40			61		47		12
	Net (loss) income	$	(551	)	$	131	$	175	$	126	$	91		$	125	$	104	$	48

Nature_of_Operations_Additiona

Nature of Operations - Additional Information (Detail) (USD $)	0 Months Ended	12 Months Ended
	Oct. 10, 2014	Dec. 31, 2014	Dec. 31, 2013
		BankingCenters
Organization And Nature Of Operations [Line Items]
Number of banking offices operates		3
Aggregate issuance of common stock	2,247,589	2,247,589	0
Proceeds from issuance of common stock	$20,136,000	$21,821,000
Net offering cost of issuance	1,685,000
Common stock and cash contribution		22,000
Pilgrim Bank Foundation [Member]
Organization And Nature Of Operations [Line Items]
Additional issuance of common stock	65,464
Common stock and cash contribution		70,360
Common stock issued expense		$725,000
Offering price per share		$10
Employee Stock Ownership Plan (ESOP) [Member]
Organization And Nature Of Operations [Line Items]
Common stock issued price per share		$10
Common stock issued in connection with employee stock purchase plan		179,807
Conahasset Bancshares, MHC [Member]
Organization And Nature Of Operations [Line Items]
Common stock issued in connection with conversion	2,182,125
Common stock issued price per share	$10

Accounting_Policies_Additional

Accounting Policies - Additional Information (Detail) (USD $)	12 Months Ended
	Dec. 31, 2014
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Cash reserve balance in Federal Reserve Bank	$753,000
Minimum Stock Investment Base	10,000
Maximum Stock Investment Base	25,000,000
Minimum [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Investment interest percentage	0.24%
FHLB advances original maturity term	2 days
Originate loans with a loan-to-value ratio	80.00%
Useful life of assets	1 year
Maximum [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Investment interest percentage	2.32%
FHLB advances original maturity term	3 months
Useful life of assets	40 years
Residential Real Estate Loans [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Nonaccrual status of loans number of days	90 days
Consumer Loans [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Nonaccrual status of loans number of days	90 days
Unsecured Consumer Loans [Member] | Minimum [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Nonaccrual status of loans number of days	120 days
Unsecured Consumer Loans [Member] | Maximum [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Nonaccrual status of loans number of days	180 days
Commercial Real Estate Loans [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Nonaccrual status of loans number of days	90 days
Commercial Business Loans and Leases [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Nonaccrual status of loans number of days	90 days
Federal Home Loan Bank Overnight Advances [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Investment interest percentage	3.00%
FHLB Advances [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Investment interest percentage	4.00%
Other FHLB Advances [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Investment interest percentage	4.50%
Standby Letters of Credit [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Investment interest percentage	0.25%
Federal Home Loan Bank Stock [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Membership Stock Investment Requirement	$100
Stock Investment Requirement rate	0.35%

Investments_in_Securities_Sche

Investments in Securities - Schedule of Amortized Cost and Fair Values of Securities (Detail) (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013
Schedule of Available-for-sale Securities [Line Items]
Available-for-sale securities, Amortized Cost Basis	$11,849	$13,837
Available-for-sale securities, Gross Unrealized Gains	36	72
Available-for-sale securities, Gross Unrealized Losses	118	413
Available-for-sale securities, Fair Value	11,767	13,496
Held-to-maturity securities, Amortized Cost Basis	149	254
Held-to-maturity securities, Gross Unrealized Gains	47	43
Held-to-maturity securities, Gross Unrealized Losses		13
Held-to-maturity securities, Fair Value	196	284
Debt Securities Issued by the U.S. Treasury and Other U.S. Government Corporations and Agencies [Member]
Schedule of Available-for-sale Securities [Line Items]
Available-for-sale securities, Amortized Cost Basis	1,985	2,460
Available-for-sale securities, Gross Unrealized Gains	7
Available-for-sale securities, Gross Unrealized Losses	17	138
Available-for-sale securities, Fair Value	1,975	2,322
Held-to-maturity securities, Amortized Cost Basis		26
Held-to-maturity securities, Gross Unrealized Gains
Held-to-maturity securities, Gross Unrealized Losses		1
Held-to-maturity securities, Fair Value		25
Debt Securities Issued by States of the United States and Political Subdivisions of the States [Member]
Schedule of Available-for-sale Securities [Line Items]
Available-for-sale securities, Amortized Cost Basis	3,258	4,447
Available-for-sale securities, Gross Unrealized Gains	5	45
Available-for-sale securities, Gross Unrealized Losses	30	120
Available-for-sale securities, Fair Value	3,233	4,372
Mortgage-Backed Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Available-for-sale securities, Amortized Cost Basis	6,606	6,148
Available-for-sale securities, Gross Unrealized Gains	24	27
Available-for-sale securities, Gross Unrealized Losses	71	155
Available-for-sale securities, Fair Value	6,559	6,020
Held-to-maturity securities, Amortized Cost Basis	149	228
Held-to-maturity securities, Gross Unrealized Gains	47	43
Held-to-maturity securities, Gross Unrealized Losses		12
Held-to-maturity securities, Fair Value	196	259
Mutual Funds [Member]
Schedule of Available-for-sale Securities [Line Items]
Available-for-sale securities, Amortized Cost Basis		782
Available-for-sale securities, Gross Unrealized Gains
Available-for-sale securities, Gross Unrealized Losses
Available-for-sale securities, Fair Value		$782

Investments_in_Securities_Sche1

Investments in Securities - Scheduled Maturities of Debt Securities (Detail) (USD $)	Dec. 31, 2014	Dec. 31, 2013
In Thousands, unless otherwise specified
Available-for-sale Securities, Debt Maturities [Abstract]
Due within one year, Available-For-Sale Securities Fair Value	$369
Due after one year through five years, Available-For-Sale Securities Fair Value	1,346
Due after five years through ten years, Available-For-Sale Securities Fair Value	1,830
Due after ten years, Available-For-Sale Securities Fair Value	1,663
Mortgage-backed securities, Available-For-Sale Securities Fair Value	6,559
Available-For-Sale Securities Fair Value Total	11,767
Due within one year, Held-To-Maturity Securities Amortized Cost Basis	0
Due after one year through five years, Held-To-Maturity Securities Amortized Cost Basis	0
Due after five years through ten years, Held-To-Maturity Securities Amortized Cost Basis	0
Due after ten years, Held-To-Maturity Securities Amortized Cost Basis	0
Mortgage-backed securities, Held-To-Maturity Securities Amortized Cost Basis	149
Held-To-Maturity Securities Amortized Cost Basis Total	149	254
Due within one year, Held-To-Maturity Securities Fair Value	0
Due after one year through five years, Held-To-Maturity Securities Fair Value	0
Due after five years through ten years, Held-To-Maturity Securities Fair Value	0
Due after ten years, Held-To-Maturity Securities Fair Value	0
Mortgage-backed securities, Held-To-Maturity Securities Fair Value	196
Held-To-Maturity Securities Fair Value Total	$196	$284

Investments_in_Securities_Addi

Investments in Securities - Additional Information (Detail) (USD $)	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013
Schedule of Available-for-sale Securities [Line Items]
Proceeds from sales of available-for-sale securities	$3,312,000	$3,569,000
Gross realized gains	72,000	34,000
Gross realized losses	4,000	29,000
Tax expenses applicable to net realized gains	24,000	2,000
Securities whose aggregate carrying amount exceeded 10% of stockholders' equity	$0	$0
Maximum [Member]
Schedule of Available-for-sale Securities [Line Items]
Percentage of equity	10.00%	10.00%

Investments_in_Securities_Sche2

Investments in Securities - Schedule of Aggregate Fair Value and Unrealized Losses of Securities (Detail) (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013
Schedule of Available-for-sale Securities [Line Items]
Less than 12 Months, Fair Value	$2,361	$5,709
Less than 12 Months, Unrealized Losses	11	268
12 Months or Longer, Fair Value	5,361	2,016
12 Months or Longer, Unrealized Losses	107	158
Fair Value, Total	7,722	7,725
Unrealized Losses, Total	118	426
Temporarily Impaired Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Less than 12 Months, Fair Value	2,361	5,709
Less than 12 Months, Unrealized Losses	11	268
12 Months or Longer, Fair Value	5,358	2,009
12 Months or Longer, Unrealized Losses	107	145
Fair Value, Total	7,719	7,718
Unrealized Losses, Total	118	413
Debt Securities Issued by the U.S. Treasury and Other U.S. Government Corporations and Agencies [Member] | Temporarily Impaired Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Less than 12 Months, Fair Value		2,322
Less than 12 Months, Unrealized Losses		138
12 Months or Longer, Fair Value	1,485	25
12 Months or Longer, Unrealized Losses	17	1
Fair Value, Total	1,485	2,347
Unrealized Losses, Total	17	139
Debt Securities Issued by States of the United States and Political Subdivisions of the States [Member] | Temporarily Impaired Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Less than 12 Months, Fair Value	950	686
Less than 12 Months, Unrealized Losses	8	55
12 Months or Longer, Fair Value	1,232	926
12 Months or Longer, Unrealized Losses	22	65
Fair Value, Total	2,182	1,612
Unrealized Losses, Total	30	120
Mortgage-Backed Securities [Member] | Temporarily Impaired Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Less than 12 Months, Fair Value	1,411	2,701
Less than 12 Months, Unrealized Losses	3	75
12 Months or Longer, Fair Value	2,641	1,058
12 Months or Longer, Unrealized Losses	68	79
Fair Value, Total	4,052	3,759
Unrealized Losses, Total	71	154
Mortgage-Backed Securities [Member] | Other-Than-Temporarily Impaired Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
12 Months or Longer, Fair Value	3	7
12 Months or Longer, Unrealized Losses		13
Fair Value, Total	3	7
Unrealized Losses, Total		$13

Investments_in_Securities_Sche3

Investments in Securities - Schedule of Other-Than-Temporary Impairment Losses on Securities (Detail) (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013
Non-Agency Mortgage-Backed Securities [Member]
Gain (Loss) on Investments [Line Items]
Total other-than-temporary impairment losses	$12	$37
Less: unrealized other-than-temporary losses recognized in other comprehensive income		-8
Net impairment losses recognized in earnings	12	29
Mutual Funds [Member]
Gain (Loss) on Investments [Line Items]
Total other-than-temporary impairment losses		218
Net impairment losses recognized in earnings		$218

Loans_Schedule_of_Loan_Detail

Loans - Schedule of Loan (Detail) (USD $)	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
In Thousands, unless otherwise specified
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and leases receivable, gross	$144,417	$133,578
Net deferred loan origination fees, costs and discounts	100	87
Allowance for loan losses	-743	-742	-788
Net loans	143,774	132,923
Commercial and Industrial Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and leases receivable, gross	3,012	2,506
Allowance for loan losses	-8	-16	-7
Real Estate Loans [Member] | One-to Four-Family Residential [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and leases receivable, gross	96,440	92,383
Allowance for loan losses	-362	-323	-362
Real Estate Loans [Member] | Commercial [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and leases receivable, gross	17,401	19,380
Allowance for loan losses	-134	-195	-152
Real Estate Loans [Member] | Multi-Family [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and leases receivable, gross	10,171	9,882
Allowance for loan losses	-36	-51	-35
Real Estate Loans [Member] | Home Equity Loans and Lines of Credit [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and leases receivable, gross	2,854	3,976
Allowance for loan losses	-27	-30	-46
Real Estate Loans [Member] | Construction [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and leases receivable, gross	12,072	3,513
Allowance for loan losses	-121	-49	-50
Consumer Loans [Member] | Consumer Line of Credit [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and leases receivable, gross	21	19
Allowance for loan losses	-1	-1	-2
Consumer Loans [Member] | Other Consumer Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and leases receivable, gross	2,446	1,919
Allowance for loan losses	($20)	($20)	($37)

Loans_Schedule_of_Allowance_fo

Loans - Schedule of Allowance for Loan Losses (Detail) (USD $)	3 Months Ended				12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2014	Dec. 31, 2013
Financing Receivable, Allowance for Credit Losses [Line Items]
Beginning balance				$788	$742	$788
Charge-offs						-51
Recoveries					1	5
Provision (benefit)	-165	36	93	36	0	0
Ending balance	742				743	742
Recoveries					1	5
Provision (benefit)	-165	36	93	36	0	0
Ending balance	742				743	742
Individually evaluated for impairment	80				37	80
Collectively evaluated for impairment	662				706	662
Total allowance for loan losses ending balance	742				743	742
Individually evaluated for impairment	6,829				7,320	6,829
Collectively evaluated for impairment	126,749				137,097	126,749
Total	133,578				144,417	133,578
Commercial and Industrial Loans [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Beginning balance				7	16	7
Provision (benefit)					-8	9
Ending balance	16				8	16
Provision (benefit)					-8	9
Ending balance	16				8	16
Collectively evaluated for impairment	16				8	16
Total allowance for loan losses ending balance	16				8	16
Collectively evaluated for impairment	2,506				3,012	2,506
Total	2,506				3,012	2,506
Unallocated [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Beginning balance				97	57	97
Provision (benefit)					-23	-40
Ending balance	57				34	57
Provision (benefit)					-23	-40
Ending balance	57				34	57
Collectively evaluated for impairment	57				34	57
Total allowance for loan losses ending balance	57				34	57
Real Estate Loans [Member] | One-to Four-Family Residential [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Beginning balance				362	323	362
Charge-offs						-48
Recoveries					1
Provision (benefit)					38	9
Ending balance	323				362	323
Recoveries					1
Provision (benefit)					38	9
Ending balance	323				362	323
Individually evaluated for impairment	80				37	80
Collectively evaluated for impairment	243				325	243
Total allowance for loan losses ending balance	323				362	323
Individually evaluated for impairment	6,126				6,572	6,126
Collectively evaluated for impairment	86,257				89,868	86,257
Total	92,383				96,440	92,383
Real Estate Loans [Member] | Commercial [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Beginning balance				152	195	152
Provision (benefit)					-61	43
Ending balance	195				134	195
Provision (benefit)					-61	43
Ending balance	195				134	195
Collectively evaluated for impairment	195				134	195
Total allowance for loan losses ending balance	195				134	195
Individually evaluated for impairment	703				695	703
Collectively evaluated for impairment	18,677				16,706	18,677
Total	19,380				17,401	19,380
Real Estate Loans [Member] | Multi-Family [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Beginning balance				35	51	35
Provision (benefit)					-15	16
Ending balance	51				36	51
Provision (benefit)					-15	16
Ending balance	51				36	51
Collectively evaluated for impairment	51				36	51
Total allowance for loan losses ending balance	51				36	51
Collectively evaluated for impairment	9,882				10,171	9,882
Total	9,882				10,171	9,882
Real Estate Loans [Member] | Home Equity Loans and Lines of Credit [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Beginning balance				46	30	46
Provision (benefit)					-3	-16
Ending balance	30				27	30
Provision (benefit)					-3	-16
Ending balance	30				27	30
Collectively evaluated for impairment	30				27	30
Total allowance for loan losses ending balance	30				27	30
Individually evaluated for impairment					53
Collectively evaluated for impairment	3,976				2,801	3,976
Total	3,976				2,854	3,976
Real Estate Loans [Member] | Construction [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Beginning balance				50	49	50
Provision (benefit)					72	-1
Ending balance	49				121	49
Provision (benefit)					72	-1
Ending balance	49				121	49
Collectively evaluated for impairment	49				121	49
Total allowance for loan losses ending balance	49				121	49
Collectively evaluated for impairment	3,513				12,072	3,513
Total	3,513				12,072	3,513
Consumer Loans [Member] | Consumer Line of Credit [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Beginning balance				2		2
Provision (benefit)						-1
Ending balance	1				1	1
Provision (benefit)						-1
Ending balance	1				1	1
Collectively evaluated for impairment	1				1	1
Total allowance for loan losses ending balance	1				1	1
Collectively evaluated for impairment	19				21	19
Total	19				21	19
Consumer Loans [Member] | Other Consumer Loans [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Beginning balance				37		37
Charge-offs						-3
Recoveries						5
Provision (benefit)						-19
Ending balance	20				20	20
Recoveries						5
Provision (benefit)						-19
Ending balance	20				20	20
Collectively evaluated for impairment	20				20	20
Total allowance for loan losses ending balance	20				20	20
Collectively evaluated for impairment	1,919				2,446	1,919
Total	$1,919				$2,446	$1,919

Loans_Additional_Information_D

Loans - Additional Information (Detail) (USD $)	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013
	Contracts	Contracts
Accounts, Notes, Loans and Financing Receivable [Line Items]
Troubled debt restructuring, Number of contracts	2
Number of loans modified as TDRs that subsequently defaulted	0	0
Commitments to lend additional funds to borrowers	$0	$0
Loans serviced for others	17,635,000	16,755,000
Directors And Executive Officers [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans to related parties	693,000
Loan principal payments	58,000
Loan principal advances	$0

Loans_Schedule_of_Nonaccrual_L

Loans - Schedule of Nonaccrual Loans and Past-Due Loans (Detail) (USD $)	Dec. 31, 2014	Dec. 31, 2013
In Thousands, unless otherwise specified
Financing Receivable, Recorded Investment, Past Due [Line Items]
30-59 Days	$1,675
60-89 Days	53	240
90 Days or More Past Due	1,393	2,075
Total Past Due	3,121	2,315
Total Current	141,296	131,263
Total	144,417	133,578
90 Days or More Past Due and Accruing	0	0
Nonaccrual Loans	1,419	2,352
Commercial and Industrial Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Current	3,012	2,506
Total	3,012	2,506
90 Days or More Past Due and Accruing	0	0
Real Estate Loans [Member] | One-to Four-Family Residential [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
30-59 Days	728
60-89 Days		240
90 Days or More Past Due	1,393	2,075
Total Past Due	2,121	2,315
Total Current	94,319	90,068
Total	96,440	92,383
90 Days or More Past Due and Accruing	0	0
Nonaccrual Loans	1,419	2,344
Real Estate Loans [Member] | Commercial [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Current	17,401	19,380
Total	17,401	19,380
90 Days or More Past Due and Accruing	0	0
Real Estate Loans [Member] | Multi-Family [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
30-59 Days	938
Total Past Due	938
Total Current	9,233	9,882
Total	10,171	9,882
90 Days or More Past Due and Accruing	0	0
Real Estate Loans [Member] | Home Equity Loans and Lines of Credit [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
60-89 Days	53
Total Past Due	53
Total Current	2,801	3,976
Total	2,854	3,976
90 Days or More Past Due and Accruing	0	0
Nonaccrual Loans		8
Real Estate Loans [Member] | Construction [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Current	12,072	3,513
Total	12,072	3,513
90 Days or More Past Due and Accruing	0	0
Consumer Loans [Member] | Consumer Line of Credit [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Current	21	19
Total	21	19
90 Days or More Past Due and Accruing	0	0
Consumer Loans [Member] | Other Consumer Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
30-59 Days	9
Total Past Due	9
Total Current	2,437	1,919
Total	2,446	1,919
90 Days or More Past Due and Accruing	$0	$0

Loans_Schedule_of_Impaired_Loa

Loans - Schedule of Impaired Loan (Detail) (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013
Financing Receivable, Impaired [Line Items]
With no related allowance recorded, Recorded Investment	$6,739	$4,846
With no related allowance recorded, Unpaid Principal Balance	6,739	4,846
With no related allowance recorded, Related Allowance	0	0
With no related allowance recorded, Average Recorded Investment	6,293	4,856
With no related allowance recorded, Interest Income Recognized	276	226
With an allowance recorded, Recorded Investment	581	1,983
With an allowance recorded, Unpaid Principal Balance	581	1,983
With an allowance recorded, Related Allowance	37	80
With an allowance recorded, Average Recorded Investment	589	1,997
With an allowance recorded, Interest Income Recognized	22	103
Total, Recorded Investment	7,320	6,829
Total, Unpaid Principal Balance	7,320	6,829
Total, Related Allowance	37	80
Total, Average Recorded Investment	6,882	6,853
Total, Interest Income Recognized	298	329
Real Estate Loans [Member] | One-to Four-Family Residential [Member]
Financing Receivable, Impaired [Line Items]
With no related allowance recorded, Recorded Investment	5,991	4,143
With no related allowance recorded, Unpaid Principal Balance	5,991	4,143
With no related allowance recorded, Related Allowance	0	0
With no related allowance recorded, Average Recorded Investment	5,586	4,150
With no related allowance recorded, Interest Income Recognized	226	168
With an allowance recorded, Recorded Investment	581	1,983
With an allowance recorded, Unpaid Principal Balance	581	1,983
With an allowance recorded, Related Allowance	37	80
With an allowance recorded, Average Recorded Investment	589	1,997
With an allowance recorded, Interest Income Recognized	22	103
Total, Recorded Investment	6,572	6,126
Total, Unpaid Principal Balance	6,572	6,126
Total, Related Allowance	37	80
Total, Average Recorded Investment	6,175	6,147
Total, Interest Income Recognized	248	271
Real Estate Loans [Member] | Commercial [Member]
Financing Receivable, Impaired [Line Items]
With no related allowance recorded, Recorded Investment	695	703
With no related allowance recorded, Unpaid Principal Balance	695	703
With no related allowance recorded, Related Allowance	0	0
With no related allowance recorded, Average Recorded Investment	699	706
With no related allowance recorded, Interest Income Recognized	50	58
Total, Recorded Investment	695	703
Total, Unpaid Principal Balance	695	703
Total, Average Recorded Investment	699	706
Total, Interest Income Recognized	50	58
Real Estate Loans [Member] | Home Equity Loans and Lines of Credit [Member]
Financing Receivable, Impaired [Line Items]
With no related allowance recorded, Recorded Investment	53
With no related allowance recorded, Unpaid Principal Balance	53
With no related allowance recorded, Related Allowance	0
With no related allowance recorded, Average Recorded Investment	8
Total, Recorded Investment	53
Total, Unpaid Principal Balance	53
Total, Average Recorded Investment	$8

Loans_Schedule_of_Loans_by_Ris

Loans - Schedule of Loans by Risk Rating (Detail) (USD $)	Dec. 31, 2014	Dec. 31, 2013
In Thousands, unless otherwise specified
Financing Receivable, Recorded Investment [Line Items]
Total loans and leases receivable	$144,417	$133,578
Pass [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans and leases receivable	41,023	32,780
Special Mention [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans and leases receivable	3,165	434
Substandard [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans and leases receivable	2,331	6,604
Loans Not Formally Rated [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans and leases receivable	97,898	93,760
Commercial and Industrial Loans [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans and leases receivable	3,012	2,506
Commercial and Industrial Loans [Member] | Pass [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans and leases receivable	3,012	2,506
Real Estate Loans [Member] | One-to Four-Family Residential [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans and leases receivable	96,440	92,383
Real Estate Loans [Member] | One-to Four-Family Residential [Member] | Special Mention [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans and leases receivable	2,417	302
Real Estate Loans [Member] | One-to Four-Family Residential [Member] | Substandard [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans and leases receivable	1,393	4,227
Real Estate Loans [Member] | One-to Four-Family Residential [Member] | Loans Not Formally Rated [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans and leases receivable	92,630	87,854
Real Estate Loans [Member] | Commercial [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans and leases receivable	17,401	19,380
Real Estate Loans [Member] | Commercial [Member] | Pass [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans and leases receivable	16,706	17,829
Real Estate Loans [Member] | Commercial [Member] | Special Mention [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans and leases receivable	695	132
Real Estate Loans [Member] | Commercial [Member] | Substandard [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans and leases receivable		1,419
Real Estate Loans [Member] | Multi-Family [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans and leases receivable	10,171	9,882
Real Estate Loans [Member] | Multi-Family [Member] | Pass [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans and leases receivable	9,233	8,932
Real Estate Loans [Member] | Multi-Family [Member] | Substandard [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans and leases receivable	938	950
Real Estate Loans [Member] | Home Equity Loans and Lines of Credit [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans and leases receivable	2,854	3,976
Real Estate Loans [Member] | Home Equity Loans and Lines of Credit [Member] | Special Mention [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans and leases receivable	53
Real Estate Loans [Member] | Home Equity Loans and Lines of Credit [Member] | Substandard [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans and leases receivable		8
Real Estate Loans [Member] | Home Equity Loans and Lines of Credit [Member] | Loans Not Formally Rated [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans and leases receivable	2,801	3,968
Real Estate Loans [Member] | Construction [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans and leases receivable	12,072	3,513
Real Estate Loans [Member] | Construction [Member] | Pass [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans and leases receivable	12,072	3,513
Consumer Loans [Member] | Consumer Line of Credit [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans and leases receivable	21	19
Consumer Loans [Member] | Consumer Line of Credit [Member] | Loans Not Formally Rated [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans and leases receivable	21	19
Consumer Loans [Member] | Other Consumer Loans [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans and leases receivable	2,446	1,919
Consumer Loans [Member] | Other Consumer Loans [Member] | Loans Not Formally Rated [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans and leases receivable	$2,446	$1,919

Loans_Schedule_of_Loans_Modifi

Loans - Schedule of Loans Modified as Troubled Debt Restructuring (Detail) (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013
	Contracts	Contracts
Financing Receivable, Modifications [Line Items]
Troubled debt restructuring, Number of contracts	2
Real Estate Loans [Member]
Financing Receivable, Modifications [Line Items]
Troubled debt restructuring, Number of contracts	2	1
Troubled debt restructuring, Pre-modification outstanding recorded investment	$574	$1,883
Troubled debt restructuring, Post-modification outstanding recorded investment	574	1,883
Real Estate Loans [Member] | One-to Four-Family Residential [Member]
Financing Receivable, Modifications [Line Items]
Troubled debt restructuring, Number of contracts	1	1
Troubled debt restructuring, Pre-modification outstanding recorded investment	521	1,883
Troubled debt restructuring, Post-modification outstanding recorded investment	521	1,883
Real Estate Loans [Member] | Home Equity Loans and Lines of Credit [Member]
Financing Receivable, Modifications [Line Items]
Troubled debt restructuring, Number of contracts	1
Troubled debt restructuring, Pre-modification outstanding recorded investment	53
Troubled debt restructuring, Post-modification outstanding recorded investment	$53

Loans_Summary_of_PreModified_L

Loans - Summary of Pre-Modified Loans Modified as Troubled Debt Restructuring (Detail) (Real Estate Loans [Member], USD $)	Dec. 31, 2014	Dec. 31, 2013
In Thousands, unless otherwise specified
Financing Receivable, Modifications [Line Items]
Rate reduction	$0	$0
Interest only period	574	1,883
Rate reduction and interest only Period	0	0
One-to Four-Family Residential [Member]
Financing Receivable, Modifications [Line Items]
Rate reduction	0	0
Interest only period	521	1,883
Rate reduction and interest only Period	0	0
Home Equity Loans and Lines of Credit [Member]
Financing Receivable, Modifications [Line Items]
Rate reduction	0
Interest only period	53
Rate reduction and interest only Period	$0

Premises_and_Equipment_Summary

Premises and Equipment - Summary of Premises and Equipment (Detail) (USD $)	Dec. 31, 2014	Dec. 31, 2013
In Thousands, unless otherwise specified
Property, Plant and Equipment [Line Items]
Premises and equipment, gross	$8,433	$8,304
Accumulated depreciation and amortization	-3,024	-2,733
Premises and equipment, net	5,409	5,571
Land [Member]
Property, Plant and Equipment [Line Items]
Premises and equipment, gross	864	864
Buildings and Improvements [Member]
Property, Plant and Equipment [Line Items]
Premises and equipment, gross	5,373	5,356
Furniture and Equipment [Member]
Property, Plant and Equipment [Line Items]
Premises and equipment, gross	$2,196	$2,084

Investment_in_Real_Estate_Summ

Investment in Real Estate - Summary of Investment in Real Estate (Detail) (USD $)	Dec. 31, 2014	Dec. 31, 2013
In Thousands, unless otherwise specified
Real Estate Properties [Line Items]
Investment in real estate, gross	$1,942	$1,942
Accumulated depreciation	-319	-280
Investment in real estate, net	1,623	1,662
Land [Member]
Real Estate Properties [Line Items]
Investment in real estate, gross	453	453
Buildings and Improvements [Member]
Real Estate Properties [Line Items]
Investment in real estate, gross	$1,489	$1,489

Investment_in_Real_Estate_Addi

Investment in Real Estate - Additional Information (Detail) (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013
Real Estate [Abstract]
Rental income	$262	$204

Deposits_Additional_Informatio

Deposits - Additional Information (Detail) (USD $)	Dec. 31, 2014	Dec. 31, 2013
Deposits [Abstract]
Aggregate amount of time deposit accounts in denominations of $100,000 or more	$38,696,000	$35,437,000
Aggregate amount of time deposit accounts in denominations that meet or exceed the Federal Deposit Insurance Corporation (FDIC) insurance limit	$15,727,000

Deposits_Summary_of_Scheduled_

Deposits - Summary of Scheduled Maturities of Time Deposits (Detail) (USD $)	Dec. 31, 2014
In Thousands, unless otherwise specified
Maturities of Time Deposits [Abstract]
2015	$33,133
2016	10,023
2017	9,212
2018	13,344
2019	771
Total	$66,483

Federal_Home_Loan_Bank_Advance2

Federal Home Loan Bank Advances - Summary of Maturities of Advances from the FHLB (Detail) (USD $)	Dec. 31, 2014	Dec. 31, 2013
In Thousands, unless otherwise specified
Federal Home Loan Bank, Advances, Fiscal Year Maturity [Abstract]
2015	$5,000
Maturities of advances from FHLB, total	$5,000	$5,000

Federal_Home_Loan_Bank_Advance3

Federal Home Loan Bank Advances - Additional Information (Detail)	12 Months Ended
	Dec. 31, 2014
Federal Home Loan Bank, Advances, Branch of FHLB Bank [Line Items]
Weighted-average interest rate	0.63%
Borrowings from FHLB, description	Borrowings from the FHLB are secured by a blanket lien on qualified collateral, consisting primarily of loans with first mortgages secured by one-to-four family properties, certain unencumbered investment securities and other qualified assets.
Minimum [Member]
Federal Home Loan Bank, Advances, Branch of FHLB Bank [Line Items]
Interest rates	0.24%
Maximum [Member]
Federal Home Loan Bank, Advances, Branch of FHLB Bank [Line Items]
Interest rates	2.32%

Income_Taxes_Components_of_Inc

Income Taxes - Components of Income Tax Expense (Detail) (USD $)	3 Months Ended								12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2014	Dec. 31, 2013
Current:
Federal									$169	$185
State									38	48
Current income tax expense (benefit), total									207	233
Deferred:
Federal									-220	322
State									-49	-15
Change in valuation allowance									128	-380
Deferred income tax expense (benefit), total									-141	-73
Total income tax expense	($181)	$69	$93	$85	$40	$61	$47	$12	$66	$160

Income_Taxes_Summary_of_Differ

Income Taxes - Summary of Differences between Statutory Federal Income Tax Rate and Effective Tax Rates (Detail)	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013
Income Tax Disclosure [Abstract]
Statutory federal income tax rate	-34.00%	34.00%
Increase (decrease) in tax rates resulting from:
Tax-exempt income	-78.40%	-9.20%
Expiration of capital loss carryforwards		72.00%
Other	8.00%	1.40%
State tax, net of federal tax	-14.00%	4.10%
Change in valuation allowance	244.20%	-72.00%
Effective tax rates	125.80%	30.30%

Income_Taxes_Schedule_of_Gross

Income Taxes - Schedule of Gross Deferred Tax Assets and Gross Deferred Tax Liabilities (Detail) (USD $)	Dec. 31, 2014	Dec. 31, 2013
In Thousands, unless otherwise specified
Deferred tax assets:
Allowance for loan losses	$302	$300
Securities capital loss carryforwards	55	4
Writedown of securities	15	100
Interest on nonaccrual loans	31	21
Net unrealized holding loss on available-for-sale securities	31	127
Charitable contribution carryovers	290
Gross deferred tax assets	724	552
Valuation allowance	-129	-1
Gross deferred tax assets after valuation allowance	595	551
Deferred tax liabilities:
Book basis in excess of tax basis of premises and equipment	-177	-186
ESOP expense	-8
Gross deferred tax liabilities	-185	-186
Net deferred tax asset	$410	$365

Income_Taxes_Additional_Inform

Income Taxes - Additional Information (Detail) (USD $)	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013
Income Taxes [Line Items]
Operating loss carryovers	$0	$0
Charitable contribution carryforward	0	0
Tax benefit from charitable contribution	290,000
Deferred tax assets valuation allowance	129,000	1,000
Pilgrim Bank Foundation [Member] | IPO [Member]
Income Taxes [Line Items]
Common stock and cash donated	725,000
Tax benefit from charitable contribution	290,000
Deferred tax assets valuation allowance	107,000
Capital loss carryovers [Member]
Income Taxes [Line Items]
Capital loss carryovers	162,000
Deferred tax assets valuation allowance	22,000
Capital loss carryovers [Member] | Tax year 2016 [Member]
Income Taxes [Line Items]
Capital loss carryovers	2,000
Capital loss carryovers expiration year	2016
Capital loss carryovers [Member] | Tax year 2018 [Member]
Income Taxes [Line Items]
Capital loss carryovers	10,000
Capital loss carryovers expiration year	2018
Capital loss carryovers [Member] | Tax year 2019 [Member]
Income Taxes [Line Items]
Capital loss carryovers	150,000
Capital loss carryovers expiration year	2019
Charitable Contributions [Member]
Income Taxes [Line Items]
Charitable contribution carryforward	725,000
Deferred tax assets valuation allowance	$129,000

Employee_Benefits_Additional_I

Employee Benefits - Additional Information (Detail) (USD $)	0 Months Ended	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2014	Dec. 31, 2013
	Employer	Officers
Multiemployer Plans [Line Items]
Number of participating employers	43
Employer Plan Year Contributions		$0	$88,000
Number of shares for ESOP		179,807
Term of loan under ESOP		29 years 2 months 12 days
Remaining principal balance on ESOP debt		1,719,000
Total compensation expense recognized		61,000
Fair value of unallocated ESOP shares		1,898,000
Employment agreement term period		3 years
Employment agreement term, number of officers		2
Change in control agreement terms		2 years
Employee Stock Ownership Plan [Member]
Multiemployer Plans [Line Items]
Percentage of aggregate purchase price of common stock		100.00%
Employee Stock Ownership Plan [Member] | After Second Year Service [Member]
Multiemployer Plans [Line Items]
Participants vesting percentage under the plan		20.00%
Employee Stock Ownership Plan [Member] | After Six Year Service [Member]
Multiemployer Plans [Line Items]
Participants vesting percentage under the plan		100.00%
IPO [Member]
Multiemployer Plans [Line Items]
Number of shares sale		2,182,125
Purchase price of shares		$10
401(k) Plan [Member]
Multiemployer Plans [Line Items]
Minimum age of employees to be eligible to participate in the plan		21
Requisite service period of employees to be eligible to participate in the plan		3 months
Minimum hours of work of employees to be eligible to participate in the plan		250 hours
Employer matching contribution percentage		100.00%
Employer matching contribution percentage relating to participant's tax contribution		5.00%
Contribution expense under the plan		85,000	81,000
401(k) Plan [Member] | Minimum [Member]
Multiemployer Plans [Line Items]
Employee matching contribution percentage		1.00%
401(k) Plan [Member] | Maximum [Member]
Multiemployer Plans [Line Items]
Employee matching contribution percentage		75.00%
Incentive Plan [Member]
Multiemployer Plans [Line Items]
Incentive compensation expense		115,000	59,000
SERP [Member]
Multiemployer Plans [Line Items]
Other retirement expense		43,000
Defined Benefit Plan (Plan C) of the CBERA Retirement Program [Member]
Multiemployer Plans [Line Items]
Further obligations under the plan		$0
Suspended benefit plan effective date		30-Apr-14

Employee_Benefits_Schedule_of_

Employee Benefits - Schedule of Employee Defined Contribution Plans and Multi-Employer Pension Plans (Detail) (USD $)	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013
Compensation and Retirement Disclosure [Abstract]
Name of Plan:	The Defined Benefit Plan (Plan C) of the CBERA Retirement Program
Plan's Tax ID #:		46035593
Plan Number:		334
Plan Year End:		31-Dec-13
Actuarial Valuation:		1-Jan-13
FTAP Percentage:		117.00%
(Funded Target Attainment Percentage)		Green
Employer Plan Year Contributions:	$0	$88,000
Multiemployer Plans, Contribution Rate Increase (Decrease), Description	Did not exceed 5%
Funding Improvement:	The Company was not subject to any specific minimum contributions other than amounts, determined by the Trustees of the plan, that maintain the funded status of the plan in accordance with the requirements of the Pension Protection Act (PPA) and the Employee Retirement Income Security Act (ERISA).

Employee_Benefits_Schedule_of_1

Employee Benefits - Schedule of Remaining Principal Balance Payable on ESOP Debt (Detail) (Employee Stock Ownership Plan [Member], USD $)	Dec. 31, 2014
In Thousands, unless otherwise specified
Employee Stock Ownership Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
2015	$37
2016	38
2017	39
2018	40
2019	42
Thereafter	1,523
Total	$1,719

Employee_Benefits_Schedule_of_2

Employee Benefits - Schedule of Shares Held by ESOP (Detail)	Dec. 31, 2014
Employee Stock Ownership Plan (ESOP), Shares in ESOP [Abstract]
Allocated	0
Committed to be allocated	5,994
Unallocated	173,813
Shares held by ESOP	179,807

OffBalance_Sheet_Activities_No

Off-Balance Sheet Activities - Notional Amounts of Financial Instrument Liabilities of Off-Balance Sheet Credit Risk (Detail) (USD $)	Dec. 31, 2014	Dec. 31, 2013
In Thousands, unless otherwise specified
Offsetting Liabilities [Line Items]
Notional amounts of financial instrument liabilities	$27,839	$11,506
Commitments to Originate Loans [Member]
Offsetting Liabilities [Line Items]
Notional amounts of financial instrument liabilities	9,981	4,180
Commitments to Purchase Loans [Member]
Offsetting Liabilities [Line Items]
Notional amounts of financial instrument liabilities	4,799
Home Equity Loans and Lines of Credit [Member] | Unadvanced Funds on Loans [Member]
Offsetting Liabilities [Line Items]
Notional amounts of financial instrument liabilities	3,389	3,848
Construction Loans [Member] | Unadvanced Funds on Loans [Member]
Offsetting Liabilities [Line Items]
Notional amounts of financial instrument liabilities	8,049	1,566
Commercial Lines of Credit [Member] | Unadvanced Funds on Loans [Member]
Offsetting Liabilities [Line Items]
Notional amounts of financial instrument liabilities	1,517	1,771
Consumer Loans [Member] | Unadvanced Funds on Loans [Member]
Offsetting Liabilities [Line Items]
Notional amounts of financial instrument liabilities	$104	$141

Commitments_and_Contingent_Lia1

Commitments and Contingent Liabilities - Additional Information (Detail)	12 Months Ended
	Dec. 31, 2014
Commitments and Contingencies Disclosure [Abstract]
Agreement original date	10-Mar-07
Term of agreement	7 years
Amended third party agreement description	The effective date of the amendment was May 1, 2012 for a seven-year term and will automatically renew for successive seven-year terms unless either party notifies the other of its intention not to renew.

Fair_Value_Measurements_Additi

Fair Value Measurements - Additional Information (Detail) (USD $)	Dec. 31, 2014
Fair Value Disclosures [Abstract]
Fair value assets transfers from Level 1 to Level 2	$0
Fair value assets transfers from Level 2 to Level 1	0
Fair value liabilities transfers from Level 1 to Level 2	0
Fair value liabilities transfers from Level 2 to Level 1	$0

Fair_Value_Measurements_Summar

Fair Value Measurements - Summary of Assets Measured at Fair Value on a Recurring Basis (Detail) (Fair Value Measurements Recurring [Member], 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]
Total assets at fair value	$11,767	$13,496
Quoted Prices in Active Markets for Identical Assets Level 1 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total assets at fair value		782
Significant Other Observable Inputs Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total assets at fair value	11,767	12,714
Debt Securities Issued by U.S. Government Corporations and Agencies [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total assets at fair value	1,975
Debt Securities Issued by U.S. Government Corporations and Agencies [Member] | Significant Other Observable Inputs Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total assets at fair value	1,975
Debt Securities Issued by States of the United States and Political Subdivisions of the States [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total assets at fair value	3,233	4,372
Debt Securities Issued by States of the United States and Political Subdivisions of the States [Member] | Significant Other Observable Inputs Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total assets at fair value	3,233	4,372
Mortgage-Backed Securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total assets at fair value	6,559	6,020
Mortgage-Backed Securities [Member] | Significant Other Observable Inputs Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total assets at fair value	6,559	6,020
Debt Securities Issued by the U.S. Treasury and Other U.S. Government Corporations and Agencies [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total assets at fair value		2,322
Debt Securities Issued by the U.S. Treasury and Other U.S. Government Corporations and Agencies [Member] | Significant Other Observable Inputs Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total assets at fair value		2,322
Mutual Funds [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total assets at fair value		782
Mutual Funds [Member] | Quoted Prices in Active Markets for Identical Assets Level 1 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total assets at fair value		$782

Fair_Value_Measurements_Summar1

Fair Value Measurements - Summary of Assets Measured at Fair Value on a Nonrecurring Basis (Detail) (Fair Value Measurements Nonrecurring [Member], 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]
Total assets at fair value	$544	$1,903
Significant Unobservable Inputs Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total assets at fair value	544	1,903
Impaired Loans [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total assets at fair value	544	1,903
Impaired Loans [Member] | Significant Unobservable Inputs Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total assets at fair value	$544	$1,903

Fair_Value_Measurements_Schedu

Fair Value Measurements - Schedule of Estimated Fair Values of Financial Instruments Held or Issued for Purposes Other Than Trading (Detail) (USD $)	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
In Thousands, unless otherwise specified
Financial assets:
Cash and cash equivalents	$18,295	$8,991	$21,141
Interest-bearing time deposits with other banks	2,575	4,511
Available-for-sale securities	11,767	13,496
Held-to-maturity securities	149	254
Federal Home Loan Bank stock	694	667
Investment in The Co-operative Central Reserve Fund	384	384
Accrued interest receivable	447	399
Financial liabilities:
Deposits	151,010	153,732
FHLB advances	5,000	5,000
Carrying Amount [Member]
Financial assets:
Cash and cash equivalents	18,295	8,991
Interest-bearing time deposits with other banks	2,575	4,511
Available-for-sale securities	11,767	13,496
Held-to-maturity securities	149	254
Federal Home Loan Bank stock	694	667
Investment in The Co-operative Central Reserve Fund	384	384
Loans, net	143,774	132,923
Accrued interest receivable	447	399
Financial liabilities:
Deposits	151,010	153,732
FHLB advances	5,000	5,000
Estimated Fair Value [Member]
Financial assets:
Cash and cash equivalents	18,295	8,991
Interest-bearing time deposits with other banks	2,578	4,518
Available-for-sale securities	11,767	13,496
Held-to-maturity securities	196	284
Federal Home Loan Bank stock	694	667
Investment in The Co-operative Central Reserve Fund	384	384
Loans, net	146,705	134,272
Accrued interest receivable	447	399
Financial liabilities:
Deposits	151,638	154,278
FHLB advances	5,006	5,182
Estimated Fair Value [Member] | Quoted Prices in Active Markets for Identical Assets Level 1 [Member]
Financial assets:
Cash and cash equivalents	18,295	8,991
Available-for-sale securities		782
Federal Home Loan Bank stock	694	667
Investment in The Co-operative Central Reserve Fund	384	384
Accrued interest receivable	447	399
Estimated Fair Value [Member] | Significant Other Observable Inputs Level 2 [Member]
Financial assets:
Interest-bearing time deposits with other banks	2,578	4,518
Available-for-sale securities	11,767	12,714
Held-to-maturity securities	196	284
Financial liabilities:
Deposits	151,638	154,278
FHLB advances	5,006	5,182
Estimated Fair Value [Member] | Significant Unobservable Inputs Level 3 [Member]
Financial assets:
Loans, net	$146,705	$134,272

Other_Comprehensive_Income_Los2

Other Comprehensive Income (Loss) - Components of Other Comprehensive Income (Loss) (Detail) (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013
Statement of Comprehensive Income [Abstract]
Net unrealized holding gain (loss) on available-for-sale securities	$330	($593)
Reclassification adjustment for net realized (gains) losses in net income	-71	219
Other comprehensive income (loss) before income tax effect	259	-374
Income tax (expense) benefit	-96	136
Other comprehensive income (loss), net of tax	$163	($238)

Regulatory_Matters_Schedule_of

Regulatory Matters - Schedule of Bank's Actual Capital Amounts and Ratios (Detail) (USD $)	Dec. 31, 2014	Dec. 31, 2013
In Thousands, unless otherwise specified
Fees And Commissions Income [Abstract]
Total Capital (to Risk Weighted Assets), Actual Amount	$22,153	$13,399
Tier 1 Capital (to Risk Weighted Assets), Actual Amount	21,398	12,650
Tier 1 Capital (to Average Assets), Actual Amount	21,398	12,650
Total Capital (to Risk Weighted Assets), Actual Ratio	21.90%	13.50%
Tier 1 Capital (to Risk Weighted Assets), Actual Ratio	21.20%	12.70%
Tier 1 Capital (to Average Assets), Actual Ratio	11.70%	7.50%
Total Capital (to Risk Weighted Assets), For Capital Adequacy Purposes, Amount	8,086	7,944
Tier 1 Capital (to Risk Weighted Assets), For Capital Adequacy Purposes, Amount	4,043	3,972
Tier 1 Capital (to Average Assets), For Capital Adequacy Purposes, Amount	7,347	6,759
Total Capital (to Risk Weighted Assets), For Capital Adequacy Purposes, Ratio	8.00%	8.00%
Tier 1 Capital (to Risk Weighted Assets), For Capital Adequacy Purposes, Ratio	4.00%	4.00%
Tier 1 Capital (to Average Assets), For Capital Adequacy Purposes, Ratio	4.00%	4.00%
Total Capital (to Risk Weighted Assets), To Be Well Capitalized Under Prompt Corrective Action Provisions, Amount	10,108	9,929
Tier 1 Capital (to Risk Weighted Assets), To Be Well Capitalized Under Prompt Corrective Action Provisions, Amount	6,065	5,958
Tier 1 Capital (to Average Assets), To Be Well Capitalized Under Prompt Corrective Action Provisions, Amount	$9,183	$8,449
Total Capital (to Risk Weighted Assets), To Be Well Capitalized Under Prompt Corrective Action Provisions, Ratio	10.00%	10.00%
Tier 1 Capital (to Risk Weighted Assets), To Be Well Capitalized Under Prompt Corrective Action Provisions, Ratio	6.00%	6.00%
Tier 1 Capital (to Average Assets), To Be Well Capitalized Under Prompt Corrective Action Provisions, Ratio	5.00%	5.00%

Regulatory_Matters_Additional_

Regulatory Matters - Additional Information (Detail) (Basel Three [Member])	Dec. 31, 2014
Basel Three [Member]
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]
Tier 1 capital to risk-weighted assets, year one	0.63%
Tier 1 capital to risk-weighted assets, multiple period increase	0.63%
Tier 1 capital to risk-weighted assets, year four	2.50%

Condensed_Parent_Company_Finan2

Condensed Parent Company Financial Statements - Condensed Balance Sheets of Parent Company (Detail) (USD $)	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
In Thousands, unless otherwise specified
ASSETS
Other assets	$278	$152
Total assets	188,035	171,556
LIABILITIES AND STOCKHOLDERS' EQUITY
Other liabilities	423	320
Stockholders' equity	31,602	12,504	12,374
Total liabilities and stockholders' equity	188,035	171,556
Parent Company [Member]
ASSETS
Noninterest bearing deposit in the Bank	8,380
Loan to the ESOP	1,719
Investment in subsidiary	21,347	12,437
Other assets	189	67
Total assets	31,635	12,504
LIABILITIES AND STOCKHOLDERS' EQUITY
Other liabilities	33
Stockholders' equity	31,602	12,504
Total liabilities and stockholders' equity	$31,635	$12,504

Condensed_Parent_Company_Finan3

Condensed Parent Company Financial Statements - Condensed Statements of Net (Loss) Income of Parent Company (Detail) (USD $)	3 Months Ended								12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2014	Dec. 31, 2013
Parent Company Only Financial Information [Line Items]
Other noninterest expense									$236	$226
Loss before income tax benefit and equity in undistributed net Income of the Bank	-732	200	268	211	131	186	151	60	-53	528
Income tax benefit	-181	69	93	85	40	61	47	12	66	160
Net (loss) income	-551	131	175	126	91	125	104	48	-119	368
Parent Company [Member]
Parent Company Only Financial Information [Line Items]
Interest income from ESOP loan									13
Charitable foundation contribution									725
Other noninterest expense									31
Loss before income tax benefit and equity in undistributed net Income of the Bank									-743
Income tax benefit									-189
Loss before equity in undistributed net income of subsidiary									-554
Equity in undistributed net income of subsidiary									435	368
Net (loss) income									($119)	$368

Condensed_Parent_Company_Finan4

Condensed Parent Company Financial Statements - Condensed Statements of Cash Flows of Parent Company (Detail) (USD $)	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013
Cash flows from operating activities:
Net (loss) income	($119,000)	$368,000
Adjustments to reconcile net loss to net cash provided by operating activities:
Contribution of common stock to Pilgrim Bank Foundation	655,000
Deferred tax benefit	-141,000	-73,000
Decrease in other assets	-56,000	-8,000
Increase in other liabilities	6,000	43,000
Net cash provided by operating activities	686,000	1,199,000
Cash flows from investing activities:
Net cash used by investing activities	-6,998,000	-12,121,000
Cash flows from financing activities:
Net proceeds from issuance of common stock	21,821,000
Net cash provided by financing activities	15,616,000	-1,228,000
Net change in cash and cash equivalents	9,304,000	-12,150,000
Cash and cash equivalents at beginning of period	8,991,000	21,141,000
Cash and cash equivalents at end of period	18,295,000	8,991,000
Parent Company [Member]
Cash flows from operating activities:
Net (loss) income	-119,000	368,000
Adjustments to reconcile net loss to net cash provided by operating activities:
Repayment of principal on ESOP loan	79,000
Equity in undistributed income of subsidiary	-435,000	-368,000
Contribution of common stock to Pilgrim Bank Foundation	655,000
Deferred tax benefit	-182,000
Decrease in other assets	60,000
Increase in other liabilities	33,000
Net cash provided by operating activities	91,000
Cash flows from investing activities:
Capital contribution to Pilgrim Bank	-10,049,000
Loan to ESOP	-1,798,000
Net cash used by investing activities	-11,847,000
Cash flows from financing activities:
Net proceeds from issuance of common stock	20,136,000
Net cash provided by financing activities	20,136,000
Net change in cash and cash equivalents	8,380,000
Cash and cash equivalents at end of period	$8,380,000

Quarterly_Financial_Data_Unaud

Quarterly Financial Data (Unaudited) - Unaudited Quarterly Financial Data (Detail) (USD $)	3 Months Ended								12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2014	Dec. 31, 2013
Quarterly Financial Information Disclosure [Abstract]
Interest and dividend income	$1,491	$1,489	$1,470	$1,543	$1,515	$1,513	$1,521	$1,414	$5,993	$5,963
Interest expense	259	273	272	262	273	289	301	312	1,066	1,175
Net interest and dividend income	1,232	1,216	1,198	1,281	1,242	1,224	1,220	1,102	4,927	4,788
Provision for loan losses					-165	36	93	36	0	0
Net interest and dividend income, after provision for loan losses	1,232	1,216	1,198	1,281	1,407	1,188	1,127	1,066	4,927	4,788
Total noninterest income	131	128	217	139	-126	121	169	187	615	351
Total noninterest expense	2,095	1,144	1,147	1,209	1,150	1,123	1,145	1,193	5,595	4,611
(Loss) income before income taxes	-732	200	268	211	131	186	151	60	-53	528
(Benefit) provision for income taxes	-181	69	93	85	40	61	47	12	66	160
Net (loss) income	($551)	$131	$175	$126	$91	$125	$104	$48	($119)	$368