Blue Hills Bancorp (BHBK) 10-Q8 Aug 142014 Q2 Quarterly reportFinancial data

Company Profile

Document_and_Entity_Informatio

Document and Entity Information Document	6 Months Ended
Document and Entity Information Document	Jun. 30, 2014	Aug. 08, 2014
Document and Entity Information [Abstract]	'	'
Entity Registrant Name	'Blue Hills Bancorp, Inc.	'
Entity Central Index Key	'0001601545	'
Current Fiscal Year End Date	'--12-31	'
Entity Filer Category	'Non-accelerated Filer	'
Document Type	'10-Q	'
Document Period End Date	30-Jun-14	'
Document Fiscal Year Focus	'2014	'
Document Fiscal Period Focus	'Q2	'
Amendment Flag	'false	'
Entity Common Stock, Shares Outstanding	'	28,466,813

Consolidated_Balance_Sheets_un

Consolidated Balance Sheets (unaudited) (USD $)	Jun. 30, 2014	Dec. 31, 2013
In Thousands, unless otherwise specified	Jun. 30, 2014	Dec. 31, 2013
Assets	'	'
Cash and due from banks	$15,308	$8,151
Short-term investments	281,618	32,165
Total cash and cash equivalents	296,926	40,316
Trading assets	0	750
Securities available for sale, at fair value	417,581	441,306
Federal Home Loan Bank stock, at cost	11,702	10,766
Loans held for sale	22,398	775
Loans, net of allowance for loan losses of $11,292,000 at June 30, 2014 and $9,671,000 at December 31, 2013	990,353	764,572
Premises and equipment, net	18,209	7,478
Accrued interest receivable	4,127	4,290
Goodwill	9,182	0
Core deposit intangible	5,179	0
Net deferred tax asset	1,020	2,831
Bank-owned life insurance	30,326	29,831
Other assets	16,102	11,372
Assets	1,823,105	1,314,287
Deposits [Abstract]	'	'
Non-interest bearing	108,252	43,471
Interest bearing	1,043,016	871,752
Total deposits	1,151,268	915,223
Stock subscriptions	283,958	0
Short-term borrowings	160,000	170,000
Long-term debt	35,000	45,000
Accrued expenses and other liabilities	16,724	12,530
Total liabilities	1,646,950	1,142,753
Commitments and contingencies	'	'
Equity [Abstract]	'	'
Preferred stock, Series A, $1.00 par value, $1,000 liquidation value (50,000 shares authorized; 18,724 issued and outstanding at June 30, 2014 and December 31, 2013)	18,724	18,724
Retained earnings	149,959	150,345
Accumulated other comprehensive income	7,472	2,465
Total equity	176,155	171,534
Liabilities and Equity	$1,823,105	$1,314,287

Consolidated_Balance_Sheets_un1

Consolidated Balance Sheets (unaudited) (Parenthetical) (USD $)	Jun. 30, 2014	Dec. 31, 2013
In Thousands, except Share data, unless otherwise specified	Jun. 30, 2014	Dec. 31, 2013
Statement of Financial Position [Abstract]	'	'
Allowance for Loan Losses	$11,292	$9,671
Preferred stock, par value (dollars per share)	$1	$1
Preferred stock, liquidation preference (dollars per share)	$1,000	$1,000
Preferred stock, shares authorized	50,000,000	50,000,000
Preferred stock, shares issued	18,724,000	18,724,000
Preferred stock, shares outstanding	18,724,000	18,724,000

Consolidated_Statements_of_Net

Consolidated Statements of Net Income (unaudited) (USD $)	3 Months Ended		6 Months Ended
In Thousands, unless otherwise specified	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013
Interest and dividend income:	'	'	'	'
Interest and fees on loans	$9,399	$4,894	$17,450	$9,758
Interest on securities	2,003	2,455	3,940	4,744
Dividends	119	475	284	649
Other	30	26	46	47
Total interest and dividend income	11,551	7,850	21,720	15,198
Interest expense:	'	'	'	'
Interest on deposits	1,348	1,827	2,699	3,639
Interest on borrowings	326	266	630	558
Total interest expense	1,674	2,093	3,329	4,197
Net interest and dividend income	9,877	5,757	18,391	11,001
Provision for loan losses	959	1,092	1,673	1,956
Net interest income, after provision for loan losses	8,918	4,665	16,718	9,045
Noninterest income:	'	'	'	'
Deposit account fees	343	134	633	267
Interchange and ATM fees	371	210	657	398
Mortgage banking	75	367	143	581
Gain on sale of jumbo residential loans	0	618	0	618
Loan level derivative income	57	182	207	270
Gains on sales of securities available for sale, net	1,191	86	1,732	4,376
Gains on trading assets, net	0	107	25	278
Bank-owned life insurance	246	1,714	495	1,987
Miscellaneous	27	247	47	332
Total noninterest income	2,310	3,665	3,939	9,107
Noninterest expense:	'	'	'	'
Salaries and employee benefits	5,212	3,870	10,341	7,794
Occupancy and equipment	1,298	945	2,899	1,938
Data processing	701	399	1,306	823
Professional fees	1,123	712	2,282	1,350
Advertising	658	654	959	1,212
FDIC deposit insurance	196	128	375	296
Directorsb fees	156	120	306	250
Amortization of core deposit intangible	509	0	862	0
Other general and administrative	809	794	1,588	1,430
Total noninterest expense	10,662	7,622	20,918	15,093
Income (loss) before income taxes	566	708	-261	3,059
Provision (benefit) for income taxes	137	-421	-292	397
Net income	$429	$1,129	$31	$2,662

Consolidated_Statements_of_Com

Consolidated Statements of Comprehensive Income (unaudited) Statement (USD $)	3 Months Ended				6 Months Ended
In Thousands, unless otherwise specified	Jun. 30, 2014		Jun. 30, 2013		Jun. 30, 2014	Jun. 30, 2013
Statement of Comprehensive Income [Abstract]	'		'		'	'
Net income	$429		$1,129		$31	$2,662
Securities available for sale:	'		'		'	'
Unrealized holding gains (losses)	5,583		-13,276		9,756	-9,701
Reclassification adjustment for net gains realized in net income	-1,191	[1]	-86	[1]	-1,732	-4,376
Net unrealized gain (loss)	4,392		-13,362		8,024	-14,077
Tax effect	-1,620		4,948		-3,017	5,227
Other comprehensive income (loss)	2,772		-8,414		5,007	-8,850
Comprehensive income (loss)	$3,201		($7,285)		$5,038	($6,188)

[1]	Amounts are included in gains on sales of securities available for sale, net, in noninterest income in the consolidated statements of operations. Income tax expense associated with the reclassification adjustment for the three months ended JuneB 30, 2014 and 2013 was approximately $440,000 and $26,000, respectively. Income tax expense associated with the reclassification adjustment for the six months ended JuneB 30, 2014 and 2013 was approximately $639,000 and $1,521,000, respectively.

Consolidated_Statements_of_Com1

Consolidated Statements of Comprehensive Income (unaudited) (Parenthetical) (USD $)	3 Months Ended		6 Months Ended
In Thousands, unless otherwise specified	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013
Statement of Comprehensive Income [Abstract]	'	'	'	'
Reclassification adjustment for net gains realized in net income, tax	$440	$26	$639	$1,521

Consolidated_Statements_of_Cha

Consolidated Statements of Changes in Equity (USD $)	Total	Preferred Stock	Retained Earnings	Accumulated Other Comprehensive Income
In Thousands, unless otherwise specified	Total	Preferred Stock	Retained Earnings	Accumulated Other Comprehensive Income
Beginning balance at Dec. 31, 2012	$176,938	$18,724	$148,211	$10,003
Increase (Decrease) in Stockholders' Equity [Roll Forward]	'	'	'	'
Comprehensive income (loss)	-6,188	0	2,662	-8,850
Preferred stock dividends declared	-318	0	-318	0
Ending balance at Jun. 30, 2013	170,432	18,724	150,555	1,153
Beginning balance at Dec. 31, 2013	171,534	18,724	150,345	2,465
Increase (Decrease) in Stockholders' Equity [Roll Forward]	'	'	'	'
Comprehensive income (loss)	5,038	0	31	5,007
Preferred stock dividends declared	-417	0	-417	0
Ending balance at Jun. 30, 2014	$176,155	$18,724	$149,959	$7,472

Consolidated_Statements_of_Cas

Consolidated Statements of Cash Flows (unaudited) (USD $)	6 Months Ended
In Thousands, unless otherwise specified	Jun. 30, 2014	Jun. 30, 2013
Cash flows from operating activities:	'	'
Net income	$31	$2,662
Adjustments to reconcile net income to net cash provided by (used in) operating activities:	'	'
Provision for loan losses	1,673	1,956
Net amortization of securities available for sale	906	1,146
Gains on sales of securities available for sale, net	-1,732	-4,376
Proceeds from sale of loans	3,765	18,680
Loans originated for sale	-3,660	-19,021
Gains on sale of loans, net	-105	-568
Gain on sale of jumbo residential loans	0	-618
Net amortization of deferred loan origination costs and discounts	507	272
Depreciation and amortization	712	679
Amortization of core deposit intangible	862	0
Bank-owned life insurance income	-495	-1,987
Deferred tax benefit	-747	-853
Net change in:	'	'
Trading assets	750	8,873
Accrued interest receivable	467	1,549
Other assets	-5,189	-11,470
Accrued expenses and other liabilities	3,453	4,956
Net cash provided by (used in) operating activities	1,198	1,880
Activity in securities available for sale:	'	'
Purchases	-129,082	-158,247
Sales	143,608	140,173
Maturities/calls	6,882	1,183
Principal paydowns	11,167	29,258
Loan (originations) net of paydowns	-89,973	-12,009
Purchases of loans	-62,145	-95,609
Proceeds from portfolio loan sales	0	27,406
Net purchases of premises and equipment	-681	-580
Purchases of FHLBB stock	-936	0
Redemption of FHLBB stock	0	384
Proceeds from bank-owned life insurance	0	5,720
Cash provided by business combination, net of purchase price	151,587	0
Net cash provided by (used in) investing activities	30,427	-62,321
Cash flows from financing activities:	'	'
Net change in deposits, excluding brokered deposits	-28,138	46,044
Net change in brokered deposits	-10,418	3,705
Net change in short-term borrowings	-10,000	-24,424
Net change in long-term borrowings	-10,000	0
Stock subscriptions received	283,958	0
Preferred stock dividends paid	-417	-318
Net cash provided by financing activities	224,985	25,007
Net change in cash and cash equivalents	256,610	-35,434
Cash and cash equivalents at beginning of year	40,316	73,819
Cash and cash equivalents at end of year	296,926	38,385
Supplementary information:	'	'
Interest paid	1,652	2,101
Income taxes paid, net of refunds	82	1,932
Preferred stock dividends declared	417	318
Fair value of non-cash assets acquired	123,755	0
Fair value of liabilities assumed	275,342	0
Portfolio loans transferred to loans held for sale designation	$22,398	'

Plan_of_Conversion

Plan of Conversion	6 Months Ended
Plan of Conversion	Jun. 30, 2014
Organization, Consolidation and Presentation of Financial Statements [Abstract]	'
Plan of Conversion	'
	PLAN OF CONVERSION

	Hyde Park Bancorp, MHC adopted a plan of conversion (the “Plan of Conversion”) on March 6, 2014, as amended on May 5, 2014, pursuant to which Blue Hills Bank (the “Bank”) converted from the mutual holding company to the stock holding company form of organization on July 21, 2014. In connection with the conversion, the Bank became a wholly owned subsidiary of Blue Hills Bancorp, Inc., a Maryland corporation (the “Company”), and the Company sold 27,772,500 shares of its common stock, representing the adjusted maximum of the offering range, at $10.00 per share, for gross offering proceeds of approximately $277,725,000, including the sale of 2,277,345 shares to the employee stock ownership plan (“ESOP”). The purchase of common stock by the ESOP was financed by a loan from Blue Hills Funding Corporation, a subsidiary of the Company. Upon the completion of the conversion, Hyde Park Bancorp, MHC and the Bank’s former Massachusetts chartered mid-tier holding company, Hyde Park Bancorp, Inc., ceased to exist.
	The direct costs of the Company’s stock offering are being deferred and deducted from the proceeds of the offering. At June 30, 2014, total deferred costs of $777,000 were included in other assets in the consolidated balance sheet. Through June 30, 2014, the Company had incurred approximately $818,000 of incremental organizational conversion costs that were charged to operations and included in noninterest expense in the consolidated statements of operations.

	In connection with the plan of conversion, the Company established the Blue Hills Bank Foundation (the “Foundation”). The Foundation was funded with $7.0 million, including 694,313 shares of the Company’s common stock and $57,000 in cash, which was recorded as an expense by the Company in July 2014. The Company anticipates the contribution will be deductible for federal income tax purposes.
	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 are maintained for the benefit of eligible holders who continue to maintain their accounts at the Bank after the 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, each account holder will be entitled to receive a distribution from the liquidation accounts as described in the Plan of Conversion. Neither the Company nor the Bank may declare or pay a cash dividend on its common stock if such dividend would cause its regulatory capital to be reduced below the amount required to maintain its respective liquidation account.

Basis_of_Presentation_and_Cons

Basis of Presentation and Consolidation	6 Months Ended
Basis of Presentation and Consolidation	Jun. 30, 2014
Organization, Consolidation and Presentation of Financial Statements [Abstract]	'
Basis of Presentation and Consolidation	'
	BASIS OF PRESENTATION AND CONSOLIDATION

	The accompanying unaudited interim consolidated financial statements include the accounts of Hyde Park Bancorp, MHC and its wholly-owned subsidiary Hyde Park Bancorp, Inc. (the mid-tier “Subsidiary”). The Subsidiary owns 100% of Blue Hills Bank. The Bank has two wholly-owned subsidiaries, HP Security Corporation and 1196 Corporation. HP Security Corporation is a Massachusetts security corporation and 1196 Corporation holds a restricted stock. All significant intercompany balances and transactions have been eliminated in consolidation. These financial statements have been prepared in accordance with accounting principles generally accepted in the United States of America (“GAAP”) for interim financial information, and with the instructions to Form 10-Q and Regulation S-X. Accordingly, they do not include all the information and footnotes required by GAAP for complete financial statements.
	In the opinion of management, all adjustments (consisting only of normal recurring accruals) considered necessary for a fair presentation have been included. The accompanying consolidated financial statements should be read in conjunction with the audited consolidated financial statements and notes thereto included in the Company's filing on Form S-1 which included the years ended December 31, 2013, 2012 and 2011. The results of operations for the three and six months ended June 30, 2014 are not necessarily indicative of the results that may be expected for the entire year or any other interim period.
	Reclassification
	Certain amounts in the December 31, 2013 consolidated financial statements have been reclassified to conform to current presentation.

	Loan policies

	Loans that management has the intent and ability to hold for the foreseeable future or until maturity or pay-off generally are reported at their outstanding unpaid principal balances adjusted for the allowance for loan losses, charge-offs and any deferred fees and costs on originated and purchased loans. Interest income is accrued on the unpaid principal balance. Deferred loan origination fees/costs and discounts on purchased loans are recognized as an adjustment of the related loan yield using the interest method.
	It is the policy of the Company to discontinue the accrual of interest on loans past due in excess of 90 days, unless the loan is well-secured and in the process of collection, or when in the judgment of management, the ultimate collectability of the principal or interest becomes doubtful and to reverse all interest previously accrued against interest income. Past due status is based on contractual terms of the loan. The interest on non-accrual loans is accounted for on the cash-basis until qualifying for return to accrual. Loans are returned to accrual status when all the principal and interest amounts contractually due have been current for six consecutive months and future payments are reasonably assured.
	Allowance for loan losses
	The allowance for loan losses is based on the size and the composition of the loan portfolio, delinquency levels, loss experience, economic conditions and other factors related to the collectability of the loan portfolio. Because 2013 and 2012 saw the growth in number and size of portfolios for which the Company had no prior loss experience, the loss experience extrapolated for all portfolios was derived from available national and state peer group losses for relevant portfolios generally over the years 2008-2013. Loan losses are charged against the allowance when management believes the uncollectability of a loan balance is confirmed. Subsequent recoveries, if any, are credited to the allowance.

	The allowance for loan losses is evaluated regularly by management and reflects consideration of all significant factors that affect the collectability of the loan portfolio. The evaluation is inherently subjective as it requires estimates that are susceptible to significant revision as more information becomes available; however, because of the increase in risk exposures new to the Company, it is the intention of management to maintain an allowance that is prudently commensurate with the growth in the loan portfolio.
	The allowance consists of general, allocated and unallocated components, as further described below.
	General component
	The general component of the allowance for loan losses is based on either actual or extrapolated historical loss experience for periods ranging from three to five years, adjusted for qualitative and environmental factors including levels/trends in delinquencies; trends in volumes 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.
	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 does not generally originate loans with a loan-to-value ratio greater than 80 percent and does not generally grant loans that would be classified as subprime upon origination. When the Company does extend credit either on a first- or second-lien basis at a loan-to-value ratio greater than 80 percent, such loans are supported by either mortgage insurance or state guarantee programs. All loans in this segment are collateralized by owner-occupied 1-4 family residential real estate and repayment is dependent on the credit quality of the individual borrower. The health of the regional economy, including unemployment rates and housing prices, will have an effect on the credit quality of loans in this segment.
	Home equity - Loans in this segment are generally secured by 1st or 2nd liens on residential real estate. Repayment is dependent on the credit quality of the individual borrower. The Company evaluates each loan application based on factors including the borrower’s credit score, income, length of employment, and other factors to establish the creditworthiness of the borrower. The Company purchased a geographically diverse portfolio of seasoned home equity lines of credit (HELOC) which are serviced by a third party. The rate of provision for this portfolio is slightly lower than that for the organically originated HELOC portfolio due to its seasoning, low loan-to-values, high credit scores, and first-lien collateral position.
	Commercial real estate - Loans in this segment include investment real estate and are generally secured by assignments of leases, real estate collateral and guarantees from sponsors or owners. In cases where there is a concentration of exposure to a single large tenant, underwriting standards include analysis of the tenant’s ability to support lease payments over the duration of the loan. 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. Payments on loans secured by income-producing properties often depend on the successful operation and management of the properties. Management continually monitors the cash flows of these loans.
	Construction - Loans in this segment primarily include speculative real estate development loans for which payment is derived from sale of the property. Credit risk is affected by cost overruns, time to sell at an adequate price, and market conditions.
	Consumer - Loans in this segment primarily include used auto loans. A significant portion of the used auto loan portfolio is comprised of geographically diverse loans originated by and purchased from a third party, who also provides collection services. While this portfolio has generated minimal charge-offs, the provisions for loan losses reflect management’s estimate of inherent losses based on a review of regional and national historical losses of other institutions with similar portfolios
	Commercial business - Loans in this segment are generally secured by business assets, including accounts receivable, inventory, real estate and intangible assets. Strict underwriting standards include considerations of the borrower’s ability to support the debt service requirements from the underlying historical and projected cash flows of the business, collateral values, the borrower’s credit history and the ultimate collectability of the debt. Economic conditions, real estate values, commodity prices, unemployment trends and other factors will affect the credit quality of loans in these segments.
	Allocated component
	The allocated component relates to loans that are on the watch list (non-accruing loans, partially charged-off non-accruing loans and accruing adversely-rated loans) and considered impaired. Impairment is measured 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 is lower than the carrying value of that loan.
	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. Management reviews all loan types for individual impairment. Factors considered by management in determining impairment include payment status, collateral value, and the probability of collecting scheduled principal and interest payments when due. Loans that experience insignificant payment delays and payment shortfalls generally are not classified as impaired. Management determines the significance of payment delays and payment shortfalls on a case-by-case basis, taking into consideration all of the circumstances surrounding the loan and the borrower, including the length of the delay, the reasons for the delay, the borrower’s prior payment record, and the amount of the shortfall in relation to the principal and interest owed.

	The Company periodically may agree to modify the contractual terms of loans. When a loan is modified and a concession is made to a borrower experiencing financial difficulty, the modification is considered a troubled debt restructuring (“TDR”). All TDRs are initially classified as impaired and generally remain impaired for the remaining life of the loan. Impaired classification may be removed if the borrower demonstrates compliance with the modified terms and the restructuring agreement specifies an interest rate equal to that which would be provided to a borrower with similar credit at the time of restructuring.
	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.

Acquisition

Acquisition	6 Months Ended
	Jun. 30, 2014
Business Combinations [Abstract]	'
Acquisition	'
	ACQUISITION
	On January 18, 2014, the Company completed the acquisition of Nantucket Bank (the "Nantucket Bank" acquisition), previously a division of Santander Bank, N.A., formerly Sovereign Bank, N.A. The acquisition included three branches and a commercial lending team in Nantucket that operate under the name Nantucket Bank, a division of Blue Hills Bank, at a purchase price of $10.3 million. The Bank assumed all of the deposits of Nantucket Bank, and acquired cash, selected local commercial loans, home equity loans and lines of credit, and real property. The goodwill resulting from the transaction is expected to be fully deductible for tax purposes. The Nantucket Bank acquisition assisted in the implementation of the Company's business strategy as it added a strong local market share of core deposits and reduced the Company's dependence on wholesale funding and brokered deposits to fund loan growth. The acquisition provided $151.6 million in cash, net of the purchase price, the majority of which has been used to pay down Federal Home Loan Bank advances and brokered deposits. The transaction also changed the interest rate sensitivity of the Bank through the addition of core deposits.
	The Company accounted for the acquisition using the acquisition method. Accordingly, the Company recorded merger and acquisition expenses of $149,000 and $947,000 during the three and six months ended June 30, 2014, respectively. There were no acquisition expenses during the three and six months ended June 30, 2013. Additionally, the acquisition method requires the acquirer to recognize the assets acquired and the liabilities assumed at their fair values as of the acquisition date. The following table summarizes the estimated fair value of the assets acquired and liabilities assumed as of the date of the acquisition:


	Assets acquired:
	Cash	$	161,900

	Loans:
	Home equity	39,966

	Commercial real estate	57,967

	Commercial business	3,862

	Consumer	444

	Discount on purchased loans	(4,773		)
	Loans, net	97,466

	Premises and equipment, net	10,762

	Core deposit intangible	6,041

	Goodwill	9,182

	Accrued interest receivable	304

	Total assets acquired	285,655


	Liabilities assumed:
	Deposits:
	NOW and demand	107,241

	Regular savings	24,511

	Money market deposits	113,764

	Term certificates	29,085

	Total deposits	274,601

	Accrued expenses and other liabilities	741

	Total liabilities assumed	275,342


	Net purchase price	$	10,313


	Fair value adjustments to assets acquired and liabilities assumed are generally amortized using either an effective yield or straight-line basis over periods consistent with the average life, useful life and/or contractual term of the related assets and liabilities.
	Fair values of the major categories of assets acquired and liabilities assumed were determined as follows:
	Cash and Cash Equivalents
	The fair values of cash and cash equivalents approximate the respective carrying amounts because the instruments are payable on demand or have short-term maturities.
	Loans
	The loans acquired were recorded at fair value without a carryover of the allowance for loan losses. Fair value of the loans is determined using market participant assumptions in estimating the amount and timing of both principal and interest cash flows expected to be collected, as adjusted for an estimate of future credit losses and prepayments, and then applying a market-based discount rate to those cash flows. The overall accretable discount on the loans acquired in this transaction was approximately $4.8 million primarily related to considerations for market interest rates, as well as estimated credit losses. For the three and six months ended June 30, 2014 the Company recorded approximately $722,000 and $855,000, respectively, of interest income attributable to the accretion of the discount on these acquired loans since the acquisition date.
	Core Deposit Intangible
	The fair value of the core deposit intangible is derived by comparing the interest rate and servicing costs that the financial institution pays on the core deposit liability versus the current market rate for alternative sources of financing. The intangible asset represents the stable and relatively low cost source of funds that the deposits and accompanying relationships provide the Company, when compared to alternative funding sources. Amortization of the core deposit intangible of $509,000 and $862,000 was recorded during three and six month periods ending June 30, 2014.
	Premises and Equipment
	The fair value of Nantucket Bank premises, including land, buildings and improvements, was determined based upon appraisal from third party appraisers. The appraisals were based upon the best and highest use of the property with final values determined based upon an analysis of the cost, sales comparison and income capitalization approaches for each property appraised.
	Deposits
	The fair value of acquired savings and transaction deposit accounts was assumed to approximate the carrying value as these accounts have no stated maturity and are payable on demand. The fair value of time deposits was determined based on the present value of the contractual cash flows over the remaining period to maturity using a market interest rate. The estimated fair value adjustment of the certificates of deposits amounted to $137,000. Accretion of certificates of deposit fair value adjustments of $57,000 and $114,000 was recorded during the three and six month periods ending June 30, 2014, respectively.

Recent_Accounting_Standards_Up

Recent Accounting Standards Updates	6 Months Ended
Recent Accounting Standards Updates	Jun. 30, 2014
Accounting Changes and Error Corrections [Abstract]	'
Recent Accounting Standards Updates	'
	RECENT ACCOUNTING STANDARDS UPDATES
	Financial Accounting Standards Board ("FASB") Accounting Standards Codification ("ASC") Subtopic 310-40 "Receivables - Troubled Debt Restructurings by Creditors" Update No. 2014-04. Update No. 2014-04 was issued in January 2014 to reduce diversity in practice by clarifying when an in substance repossession or foreclosure occurs, that is, when a creditor should be considered to have received physical possession of residential real estate property collateralizing a consumer mortgage loan such that the loan receivable should be derecognized and the real estate property recognized. The amendments in this update clarify that an in substance repossession or foreclosure occurs, and a creditor is considered to have received physical possession of residential real estate property collateralizing a consumer mortgage loan, upon either (1) the creditor obtaining legal title to the residential real estate property upon completion of a foreclosure or (2) the borrower conveying all interest in the residential real estate property to the creditor to satisfy the loan through completion of a deed in lieu of foreclosure or through a similar legal agreement. Additionally, the amendments require interim and annual disclosure of both (1) the amount of foreclosed residential real estate property held by the creditor and (2) the recorded investment in consumer mortgage loans collateralized by residential real estate property that are in the process of foreclosure according to local requirements of the applicable jurisdiction. The amendments in the update should be applied prospectively and are effective for fiscal years, and interim periods within those years, beginning after December 15, 2014. Early adoption is permitted. The adoption of this standard is not expected to have a material impact on the Company's consolidated financial statements.

Securities_Available_for_Sale

Securities Available for Sale	6 Months Ended
	Jun. 30, 2014
Investments, Debt and Equity Securities [Abstract]	'
Securities Available for Sale	'
	SECURITIES AVAILABLE FOR SALE
	The amortized cost and estimated fair value of securities available for sale, with gross unrealized gains and losses, follows:


		Amortized			Gross			Gross				Fair
		Cost			Unrealized			Unrealized				Value
					Gains			Losses
		(In thousands)
	30-Jun-14
	Debt securities:
	U.S. Treasury	$	90,622		$	276		$	(1,319	)		$	89,579

	Government-sponsored enterprises	13,318			58			(20		)		13,356

	Government-sponsored mortgage-backed and collateralized mortgage obligations	70,142			981			(313		)		70,810

	Other mortgage- and asset-backed securities:

	Privately issued commercial mortgage-backed securities	24,412			95			(119		)		24,388

	Privately issued residential mortgage-backed securities	4,841			527			(1		)		5,367

	SBA asset-backed securities	16,133			142			(163		)		16,112

	Other asset-backed securities	12,029			23			(6		)		12,046

	Total other mortgage- and asset-backed securities	57,415			787			(289		)		57,913

	State and political subdivisions	23,542			539			(14		)		24,067

	Foreign government backed securities	4,049			22			—				4,071

	Financial services:

	Banks	17,837			733			(17		)		18,553

	Diversified financials	14,008			589			(5		)		14,592

	Insurance and REITs	14,959			468			—				15,427

	Total financial services	46,804			1,790			(22		)		48,572

	Other corporate:
	Industrials	42,489			1,016			(38		)		43,467

	Utilities	17,166			519			—				17,685

	Total other corporate	59,655			1,535			(38		)		61,152

	Total debt securities	365,547			5,988			(2,015		)		369,520


	Marketable equity securities:
	Mutual funds:
	Global equity	5,000			821			—				5,821

	Domestic community	3,216			70			(5		)		3,281

	Global asset allocation	32,956			6,003			—				38,959

	Total marketable equity securities	41,172			6,894			(5		)		48,061

	Total securities available for sale	$	406,719		$	12,882		$	(2,020	)		$	417,581




	Amortized			Gross			Gross				Fair
	Cost			Unrealized			Unrealized				Value
				Gains			Losses
	(In thousands)
31-Dec-13
Debt securities:
U.S. Treasury	$	131,781		$	145		$	(3,724	)		$	128,202

Government-sponsored enterprises	13,985			81			(109		)		13,957

Government-sponsored mortgage-backed and collateralized mortgage obligations	67,787			778			(1,072		)		67,493

Other mortgage- and asset-backed securities:
Privately issued commercial mortgage-backed securities	22,828			127			(281		)		22,674

Privately issued residential mortgage-backed securities	3,021			362			—				3,383

SBA asset-backed securities	9,787			—			(393		)		9,394

Other asset-backed securities	10,974			57			(9		)		11,022

Total other mortgage- and asset-backed securities	46,610			546			(683		)		46,473

State and political subdivisions	15,628			218			(107		)		15,739

Financial services:

Banks	12,535			889			(74		)		13,350

Diversified financials	14,023			557			(52		)		14,528

Insurance and REITs	15,635			250			(92		)		15,793

Total financial services	42,193			1,696			(218		)		43,671

Other corporate:
Industrials	32,920			842			(312		)		33,450

Utilities	12,000			286			(200		)		12,086

Total other corporate	44,920			1,128			(512		)		45,536

Total debt securities	362,904			4,592			(6,425		)		361,071


Marketable equity securities:
Mutual funds:
Global equity	5,000			540			—				5,540

Domestic community	3,216			48			(43		)		3,221

Global asset allocation	32,956			4,168			—				37,124

Diversified bonds	34,392			71			(113		)		34,350

Total marketable equity securities	75,564			4,827			(156		)		80,235

Total securities available for sale	$	438,468		$	9,419		$	(6,581	)		$	441,306












The amortized cost and estimated fair value of debt securities by contractual maturity at June 30, 2014 follow. Expected maturities will differ from contractual maturities because the issuers may have the right to call or prepay obligations with or without call or prepayment penalties.


	Amortized			Fair
	Cost			Value
	(In thousands)
Within 1 year	$	12,494		$	12,544

After 1 year through 5 years	120,628			122,256

After 5 years through 10 years	92,352			93,142

After 10 years	12,516			12,855

	237,990			240,797

Mortgage- and asset-backed securities and collateralized mortgage obligations	127,557			128,723

	$	365,547		$	369,520

The Company continually reviews investment securities for the existence of other-than-temporary impairment ("OTTI"), taking into consideration current market conditions, the extent and nature of changes in fair value, issuer rating changes and trends, the credit worthiness of the obligor of the security, volatility of earnings, current analysts’ evaluations, the Company’s intent to sell the security, or whether it is more likely than not that the Company will be required to sell the debt security before its anticipated recovery, as well as other qualitative factors. The term “other-than-temporary” is not intended to indicate that the decline is permanent, but indicates that the prospects for a near-term recovery of value is not necessarily favorable, or that there is a lack of evidence to support a realizable value equal to or greater than the carrying value of the investment.
Information pertaining to securities available for sale with gross unrealized losses aggregated by investment category and length of time that individual securities have been in a continuous loss position, follows:


	Less Than Twelve Months						More Than Twelve Months
	Gross			Fair			Gross				Fair
	Unrealized			Value			Unrealized				Value
	Losses						Losses
	(In thousands)
30-Jun-14
Debt securities:
U.S. Treasury	$	(13	)	$	6,809		$	(1,306	)		$	56,288

Government-sponsored enterprises	—			—			(20		)		1,076

Government-sponsored mortgage-backed and collateralized mortgage obligations	—			—			(313		)		21,988

Other mortgage- and asset-backed securities:
Privately issued commercial mortgage- backed securities	(20		)	6,041			(99		)		8,939

Privately issued residential mortgage-backed securities	(1		)	803			—				—

SBA asset-backed securities	—			—			(163		)		4,210

Other asset-backed securities	(6		)	3,260			—

Total other mortgage- and asset-backed securities	(27		)	10,104			(262		)		13,149

State and political subdivisions	(3		)	989			(11		)		687

Financial services:
Banks	—			—			(17		)		680

Diversified financials	(5		)	1,093			—				—

Total financial services	(5		)	1,093			(17		)		680

Other corporate:
Industrials	(25		)	6,127			(13		)		2,718

Total debt securities	(73		)	25,122			(1,942		)		96,586

Marketable equity securities:
Mutual funds:
Domestic community	—			—			(5		)		461

Total marketable equity securities	—			—			(5		)		461

Total temporarily impaired securities	$	(73	)	$	25,122		$	(1,947	)		$	97,047



	Less Than Twelve Months						More Than Twelve Months
	Gross			Fair			Gross				Fair
	Unrealized			Value			Unrealized				Value
	Losses						Losses
	(In thousands)
31-Dec-13
Debt securities:
U.S. Treasury	$	(3,724	)	$	117,043		$	—			$	—

Government-sponsored enterprises	(109		)	3,920			—				—

Government-sponsored mortgage-backed and collateralized mortgage obligations	(973		)	37,265			(99		)		3,341

Other mortgage- and asset-backed securities:
Privately issued commercial mortgage- backed securities	(130		)	10,926			(151		)		4,153

SBA asset-backed securities	(393		)	8,499			—				—

Other asset-backed securities	(9		)	7,809			—				—

Total other mortgage- and asset-backed securities	(532		)	27,234			(151		)		4,153

State and political subdivisions	(107		)	5,904							—

Financial services:
Banks	(74		)	1,773			—				—

Diversified financials	(52		)	1,380			—				—

Insurance and REITs	(92		)	5,466			—				—

Total financial services	(218		)	8,619			—				—

Other corporate:
Industrials	(312		)	10,947			—				—

Utilities	(200		)	12,671			—				—

Total other corporate	(512		)	23,618			—				—

Total debt securities	(6,175		)	223,603			(250		)		7,494

Marketable equity securities:
Mutual funds:
Domestic community	(30		)	2,767			(13		)		453

Diversified bonds	(109		)	21,450			(4		)		71

Total marketable equity securities	(139		)	24,217			(17		)		524

Total temporarily impaired securities	$	(6,314	)	$	247,820		$	(267	)		$	8,018

Management evaluates securities for other-than-temporary impairment at least on a quarterly basis, and more frequently when economic or market concerns warrant such evaluation.
At June 30, 2014, multiple debt securities have unrealized losses with aggregate depreciation of less than 1% from the Company’s amortized cost basis. The unrealized losses were primarily caused by interest rate fluctuations. A significant portion of these investments are guaranteed by the U.S. Government or an agency thereof. It is expected that none of these securities would be settled at a price less than the par value of the investment. Because the decline in market value is attributable to changes in interest rates and not to credit quality, and because the Company does not intend to sell the securities and it is more likely than not that the Company will not be required to sell the securities before recovery of their amortized cost bases, which may be maturity, the Company does not consider these securities to be other-than-temporarily impaired at June 30, 2014.

At June 30, 2014, the Company had one mutual fund with unrealized losses of $5,000, or less than 1% depreciation from the Company’s cost basis. No issues have been identified that cause management to believe the declines in market value are other than temporary and the Company has the ability and intent to hold these investments until a recovery of fair value.

Loans_and_The_Allowance_for_Lo

Loans and The Allowance for Loan Loss	6 Months Ended
	Jun. 30, 2014
Receivables [Abstract]	'
Loans and Allowance for Loan Loss	'
	LOANS AND THE ALLOWANCE FOR LOAN LOSS
	A summary of the balances of loans follows:



		June 30,				December 31,
		2014				2013
		(In thousands)
	Real estate:
	1-4 family residential	$	407,142			$	364,932

	Home equity	62,900				25,535

	Commercial real estate	337,643				228,688

	Construction	45,348				16,559

		853,033				635,714

	Commercial business	120,481				111,154

	Consumer	29,550				25,372

	Total loans	1,003,064				772,240

	Allowance for loan losses	(11,292		)		(9,671		)
	Discount on purchased loans	(4,226		)		(340		)
	Deferred loan costs and fees, net	2,807				2,343

	Loans, net	$	990,353			$	764,572

	Activity in the allowance for loan losses for the three and six months months ended June 30, 2014 and 2013 and allocation of the allowance to loan segments as of June 30, 2014 and December 31, 2013 follows:



		1-4 Family				Home				Commercial			Construction			Commercial			Consumer				Unallocated				Total
		Residential				Equity				Real Estate						Business
		(In thousands)
	Three Months Ended June 30, 2014

	Allowance at March 31, 2014	$	2,887			$	268			$	2,928		$	414		$	2,589		$	602			$	658			$	10,346

	Provision for loan losses	201				37				314			285			66			56				—				959

	Loans charged-off	—				—				—			—			—			(13		)		—				(13		)

	Recoveries	—				—				—			—			—			—				—				—

	Allowance at June 30, 2014	$	3,088			$	305			$	3,242		$	699		$	2,655		$	645			$	658			$	11,292





	Three Months Ended June 30, 2013
	Allowance at March 31, 2013	$	2,548			$	321			$	1,653		$	115		$	476		$	362			$	919			$	6,394

	Provision (credit) for loan losses	(269		)		8				279			78			1,025			54				(83		)		1,092

	Loans charged-off	(5		)		—				—			—			—			(15		)		—				(20		)

	Recoveries	156				—				—			—			—			—				—				156

Allowance at June 30, 2013	$	2,430			$	329			$	1,932		$	193		$	1,501		$	401			$	836			$	7,622




	1-4 Family				Home				Commercial			Construction			Commercial			Consumer				Unallocated				Total
	Residential				Equity				Real Estate						Business
	(In thousands)
Six Months Ended June 30, 2014
Allowance at December 31, 2013	$	2,835			$	247			$	2,608		$	303		$	2,416		$	574			$	688			$	9,671

Provision (credit) for loan losses	271				58				634			396			239			105				(30		)		1,673

Loans charged-off	(18		)		—				—			—			—			(34		)		—				(52		)

Recoveries	—				—				—			—			—			—				—				—

Allowance at June 30, 2014	$	3,088			$	305			$	3,242		$	699		$	2,655		$	645			$	658			$	11,292



Six Months Ended June 30, 2013
Allowance at December 31, 2012	$	2,725			$	316			$	1,343		$	106		$	565		$	313			$	182			$	5,550

Provision (credit) for loan losses	(433		)		13				589			87			936			110				654				1,956

Loans charged-off	(98		)		—				—			—			—			(22		)		—				(120		)

Recoveries	236				—				—			—			—			—				—				236

Allowance at June 30, 2013	$	2,430			$	329			$	1,932		$	193		$	1,501		$	401			$	836			$	7,622



Additional information pertaining to the allowance for loan losses at June 30, 2014 and December 31, 2013 is as follows:


	1-4 Family				Home				Commercial			Construction			Commercial			Consumer				Unallocated				Total
	Residential				Equity				Real Estate						Business
	(In thousands)
June 30, 2014
Allowance related to impaired loans	$	—			$	—			$	—		$	—		$	—		$	—			$	—			$	—

Allowance related to non-impaired loans	3,088				305				3,242			699			2,655			645				658				11,292

Total allowance for loan losses	$	3,088			$	305			$	3,242		$	699		$	2,655		$	645			$	658			$	11,292

Impaired loans	$	4,202			$	807			$	—		$	—		$	—		$	48			$	—			$	5,057

Non-impaired loans	402,940				62,093				337,643			45,348			120,481			29,502				—				998,007

Total loans	$	407,142			$	62,900			$	337,643		$	45,348		$	120,481		$	29,550			$	—			$	1,003,064

31-Dec-13
Allowance related to impaired loans	$	—			$	—			$	—		$	—		$	—		$	—			$	—			$	—

Allowance related to non-impaired loans	2,835				247				2,608			303			2,416			574				688				9,671

Total allowance for loan losses	$	2,835			$	247			$	2,608		$	303		$	2,416		$	574			$	688			$	9,671

Impaired loans	$	3,118			$	36			—			$	—		$	—		$	—			$	—			$	3,154

Non-impaired loans	361,814				25,499				228,688			16,559			111,154			25,372				—				769,086

Total loans	$	364,932			$	25,535			$	228,688		$	16,559		$	111,154		$	25,372			$	—			$	772,240


The following is a summary of past due and non-accrual loans, by loan class, at June 30, 2014 and December 31, 2013:



	30-59 Days				60-89 Days				Past Due 90			Total			Loans on
	Past Due				Past Due				Days or More			Past Due			Non-accrual
	(In thousands)
June 30, 2014
Real estate:
1-4 family residential	$	2,359			$	—			$	1,131		$	3,490		$	3,647

Home equity	205				—				563			768			807

Consumer	10				18				—			28			48

Total	$	2,574			$	18			$	1,694		$	4,286		$	4,502




December 31, 2013
Real estate:
1-4 family residential	$	1,426			$	196			$	828		$	2,450		$	1,706

Home equity	—				—				36			36			36

Total	$	1,426			$	196			$	864		$	2,486		$	1,742

There were no loans past due 90 days or more and still accruing at June 30, 2014 and December 31, 2013.

The following is a summary of information pertaining to impaired loans by loan segment at the dates indicated:



	Recorded				Unpaid				Related
	Investment				Principal				Allowance
					Balance
June 30, 2014
Impaired loans without a valuation allowance:
Real estate:
1-4 family residential	$	4,202			$	4,994			$	—

Home equity	807				1,066				—

Consumer	48				48				—

Total	$	5,057			$	6,108			$	—


December 31, 2013
Impaired loans without a valuation allowance:
Real estate:
1-4 family residential	$	3,118			$	3,893			$	—

Consumer loans	36				36				—

Total	$	3,154			$	3,929			$	—



The following tables set forth information regarding average balances and interest income recognized on impaired loans by segment, for the periods indicated:



	Average				Interest
	Recorded				Income
	Investment				Recognized
Three Months Ended June 30, 2014
Real estate:
1-4 family residential	$	3,753			$	49

Home equity	683				—

Commercial business	276				—

Consumer	29				—

Total	$	4,741			$	49


Three Months Ended June 30, 2013
Real estate:
1-4 family residential	$	2,369			$	39

Consumer	18				—

Total	$	2,387			$	39




	Average				Interest
	Recorded				Income
	Investment				Recognized
Six Months Ended June 30, 2014
Real estate:
1-4 family residential	$	3,241			$	83

Home equity	455				4

Commercial business	184				4

Consumer	19				—

Total	$	3,899			$	91


Six Months Ended June 30, 2013
Real estate:
1-4 family residential	$	2,171			$	65

Consumer	12				1

Total	$	2,183			$	66


None of the loans acquired in the Nantucket Acquisition were deemed to be Purchased Credit Impaired ("PCI").
No additional funds are committed to be advanced in connection with impaired loans.

There were no troubled debt restructurings recorded during the three and six months ended June 30, 2014 and 2013 and there were no troubled debt restructurings that defaulted during the three and six months ended June 30, 2014 and 2013, for which default was within one year of the restructure date.
Credit Quality Information
The Company utilizes a ten-grade internal loan rating system for all loans as follows:
Loans rated 1 – 6 are considered “acceptable” rated loans that are performing as agreed, meet minimum underwriting standards, and require only routine supervision.
Loans rated 7 are considered “special mention.” These loans are starting to show signs of potential weakness and are being closely monitored by management.
Loans rated 8 – 9 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. Generally, all loans 90 days delinquent are rated 8.
Loans rated 10 are considered "doubtful" and 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.
The Company assigns a 6 risk-rating to otherwise performing, satisfactorily collateralized Consumer and Residential loans where the Bank becomes aware of deterioration in a FICO score or other indication of potential inability to service the debt. The Company assigns risk ratings of 7-10 to residential or consumer loans that have a well-defined weakness that may jeopardize the collection of the contractual principal and interest, are contractually past due 90 days or more or legal action has commenced against the borrower. All other residential mortgage and consumer loans have no risk rating.
On an annual basis, or more often if needed, the Company formally reviews the ratings on all commercial and construction loans. At least annually, the Company engages an independent third party to review a significant portion of loans within these segments. Management uses the results of these reviews as part of its annual review process. In addition, management utilizes delinquency reports, the watch list and other loan reports to monitor credit quality of other loan segments.
The following tables present the Company’s loans by risk rating at June 30, 2014 and December 31, 2013:



	1-4 Family				Home				Commercial			Construction			Commercial			Consumer				Total
	Residential				Equity				Real Estate						Business							Loans
	(In thousands)
June 30, 2014
Loans rated 1 - 6	$	3,422			$	518			$	336,522		$	45,348		$	109,945		$	123			$	495,878

Loans rated 7	2,935				1,190				1,121			—			10,536			2				15,784

Loans rated 8 - 9	1,350				—				—			—			—			48				1,398

Loans rated 10	693				—				—			—			—			—				693

Loans not rated	398,742				61,192				—			—			—			29,377				489,311

	$	407,142			$	62,900			$	337,643		$	45,348		$	120,481		$	29,550			$	1,003,064

31-Dec-13
Loans rated 1 - 6	$	1,701			$	4,610			$	223,144		$	15,246		$	110,142		$	—			$	354,843

Loans rated 7	468				—				2,339			—			12			—				2,819

Loans rated 8 - 9	1,647				36				—			—			—			24				1,707

Loans rated 10	693				—				—			—			—			—				693

Loans not rated	360,423				20,889				3,205			1,313			1,000			25,348				412,178

	$	364,932			$	25,535			$	228,688		$	16,559		$	111,154		$	25,372			$	772,240

Interest_Rate_Swap_Agreements

Interest Rate Swap Agreements	6 Months Ended
	Jun. 30, 2014
Derivative Instruments and Hedging Activities Disclosure [Abstract]	'
Interest Rate Swap Agreements	'
	INTEREST RATE SWAP AGREEMENTS
	The Company is party to derivative financial instruments in the normal course of business to manage exposure to fluctuations in interest rates and to meet the needs of commercial customers. These financial instruments have been generally limited to loan level interest rate swap agreements, which are entered into with counterparties that meet established credit standards. These transactions involve both credit and market risk. The notional amounts are amounts on which calculations, payments, and the value of the derivatives are based. Notional amounts do not represent direct credit exposures. The fair value of the derivative instruments is reflected on the Company’s consolidated balance sheet as other assets or accrued expenses and other liabilities as appropriate. Changes in the fair value of these agreements are recorded in miscellaneous income in the consolidated statements of operations.

	The Company did not have derivative fair value hedges or derivative cash flow hedges at June 30, 2014 and December 31, 2013. The table below presents information about derivative financial instruments not designated as hedging instruments at June 30, 2014 and and December 31, 2013.


		Derivative Gains				Derivative Losses
		Notional		Fair		Notional		Fair
		Amount		Value		Amount		Value
		(In thousands)
	30-Jun-14
	Economic hedges:
	Commercial loan level interest rate swap agreements	$	184,973	$	4,126	$	184,973	$	4,299

	Other contracts	8,774		7		7,922		17

	Total derivatives	$	193,747	$	4,133	$	192,895	$	4,316

	31-Dec-13
	Economic hedges:
	Commercial loan level interest rate swap agreements	$	171,747	$	2,482	$	171,747	$	2,379

	Other contracts	8,932		5		7,988		14

	Total derivatives	$	180,679	$	2,487	$	179,735	$	2,393

	The Company is exposed to credit-related losses in the event of nonperformance by the counterparties to these agreements. The Company controls the credit risk of its financial contracts through credit approvals, limits and monitoring procedures, and does not expect any counterparties to fail their obligations. The Company has minimum collateral posting thresholds with certain of its interest rate swap derivative counterparties.
	Other contracts represent risk participation agreements on commercial loan level interest rate swap agreements. The Company has entered into risk participation agreements with the correspondent institutions to share in any interest rate swap gains or losses incurred as a result of the commercial loan customers’ termination of a loan level interest rate swap agreement prior to maturity. The Company records these risk participation agreements at fair value.

Deposits

Deposits	6 Months Ended
	Jun. 30, 2014
Banking and Thrift [Abstract]	'
Deposits	'
	DEPOSITS
	A summary of deposit balances, by type, is as follows:


		June 30,		December 31,
		2014		2013
		(In thousands)
	NOW and demand	$	237,586	$	118,648

	Regular savings	343,697		332,518

	Money market deposits	195,264		75,716

	Total non-certificate accounts	776,547		526,882


	Certificates of deposit	293,516		296,718

	Brokered deposits	81,205		91,623

	Total certificate accounts	374,721		388,341

	Total deposits	$	1,151,268	$	915,223


	At June 30, 2014, the scheduled maturities of term certificate accounts, including brokered deposits, are as follows:


		Amount		Weighted
				Average
				Rate
		(Dollars in thousands)
	Within 1 year	$	272,211	0.62	%

	1-2 years	47,301		1.41

	2-3 years	35,331		1.31

	3-4 years	10,647		1.18

	4 years and beyond	9,231		1.14

		$	374,721	0.82	%

Fair_Value_Measurements

Fair Value Measurements	6 Months Ended
	Jun. 30, 2014
Fair Value Disclosures [Abstract]	'
Fair Value Measurements	'
	FAIR VALUE MEASURMENTS
	Determination of fair value
	The Company uses fair value measurements to record fair value adjustments to certain assets and liabilities and to determine fair value disclosures. Fair value is the price that would be received to sell an asset or paid to transfer a liability in an orderly transaction between market participants at the measurement date. Fair value is best determined based upon quoted market prices. However, in many instances, there are no quoted market prices for the Company’s various financial instruments. In cases where quoted market prices are not available, fair values are based on estimates using present value or other valuation techniques. Those techniques are significantly affected by the assumptions used, including the discount rate and estimates of future cash flows. Accordingly, the fair value estimates may not be realized in an immediate settlement of the instrument.
	Fair value hierarchy
	The following methods and assumptions were used by the Company in estimating fair value disclosures for financial instruments:
	Cash and cash equivalents: The carrying amounts of cash and due from banks and short-term investments approximate fair value.
	Trading assets and securities available for sale: All fair value measurements are obtained from a third-party pricing service and are not adjusted by management. The securities measured at fair value in Level 1 are based on quoted market prices in an active exchange market. These securities include U.S. Treasuries and marketable equity securities. All other securities are measured at fair value in Level 2 based on pricing models that consider standard input factors such as observable market data, benchmark yields, interest rate volatilities, broker/dealer quotes, credit spreads and new issue data.
	Federal Home Loan Bank stock: The carrying value of Federal Home Loan Bank stock approximates fair value based on the redemption provisions of the Federal Home Loan Bank.

	Loans: For variable-rate loans that reprice frequently and with no significant change in credit risk, fair values are based on carrying values. Fair values for other types of loans are estimated using discounted cash flow analyses, using market interest rates currently being offered for loans with similar terms to borrowers of similar credit quality. Fair values for non-performing loans are estimated using discounted cash flow analyses or underlying collateral values, where applicable.

	Loans held for sale: Fair values are based on commitments in effect from investors or prevailing market prices.

	Accrued interest receivable: The carrying amount of accrued interest receivable approximates fair value.

	Deposits: The fair values for non-certificate accounts are, by definition, equal to the amount payable on demand at the reporting date (i.e., their carrying amounts). Fair values for certificate accounts are estimated using a discounted cash flow calculation that applies market interest rates currently being offered on certificates to a schedule of aggregated expected monthly maturities on time deposits.

	Borrowings: The carrying value of short-term borrowings approximates fair value based on the short-term nature of the instruments. The fair values of long-term debt are estimated using discounted cash flow analyses based on the current incremental borrowing rates in the market for similar types of borrowing arrangements.

	Derivative instruments: The fair values of interest rate swap agreements are based on a valuation model that uses primarily observable inputs, such as benchmark yield curves and interest rates and also include the value associated with counterparty credit risk.

	Off-balance sheet instruments: Fair values for off-balance sheet lending commitments are based on fees currently charged to enter into similar agreements, taking into account the remaining terms of the agreements and the counterparties’ credit standing. The estimated fair value of off-balance sheet financial instruments at June 30, 2014 and 2013, was immaterial since fees charged are not material.

	Assets and liabilities measured at fair value on a recurring basis
	Assets and liabilities measured at fair value on a recurring basis are summarized below:



		Level 1			Level 2				Level 3			Total
												Fair Value
		(In thousands)
	30-Jun-14
	Assets
	Securities available for sale:
	Debt securities	$	89,579		$	279,941			$	—		$	369,520

	Marketable equity securities	48,061			—				—			48,061

	Derivative assets	—			4,133				—			4,133

	Total assets	$	137,640		$	284,074			$	—		$	421,714

	Liabilities
	Derivative liabilities	$	—		$	4,316			$	—		$	4,316


	31-Dec-13
	Assets
	Trading assets	$	—		$	750			$	—		$	750

	Securities available for sale:
	Debt securities	128,202			232,869				—			361,071

	Marketable equity securities	80,235			—				—			80,235

	Derivative assets	—			2,487				—			2,487

	Total assets	$	208,437		$	236,106			$	—		$	444,543

	Liabilities
	Derivative liabilities	$	—		$	2,393			$	—		$	2,393

	Total liabilities	$	—		$	2,393			$	—		$	2,393


Assets measured at fair value on a non-recurring basis
The Company may also be required, from time to time, to measure certain assets at fair value on a nonrecurring basis in accordance with generally accepted accounting principles. These adjustments to fair value usually result from application of lower-of-cost-or-market accounting or write-downs of individual assets. There were no assets measured at fair value on a non-recurring basis at June 30, 2013 or December 31, 2013. There are no liabilities measured at fair value on a non-recurring basis. The following tables summarize losses and fair value hierarcy applicable to assets mesarued at fair value on a non-recurring basis:



	At June 30, 2014					Three months ended June 30, 2014	Six months ended June 30, 2014
	Level 1		Level 2	Level 3		Total Losses
	(In thousands)
Impaired loans	$—		$—	$1,197		$—	$18
Losses applicable to impaired loans are based on the appraised value of the underlying collateral, discounted as necessary due to management’s estimates of changes in market conditions. The losses applicable to impaired loans are not recorded as a direct adjustment to current earnings or comprehensive income, but rather as a component in determining the overall adequacy of the allowance for loan losses. Adjustments to the estimated fair value of impaired loans may result in increases or decreases to the provision for loan losses.

Summary of fair values of financial instruments
The estimated fair values, and related carrying amounts, of the Company’s financial instruments are as follows. Certain financial instruments and all nonfinancial instruments are exempt from disclosure requirements. Accordingly, the aggregate fair value amounts presented herein do not represent the underlying fair value of the Company.



	Carrying			Fair Value
	Amount			Level 1				Level 2			Level 3			Total
	(In thousands)
30-Jun-14
Financial assets:
Cash and cash equivalents	$	296,926		$	296,926			$	—		$	—		$	296,926

Securities available for sale	417,581			137,640				279,941			—			417,581

Federal Home Loan Bank stock	11,702			—				—			11,702			11,702

Loans and loans held for sale	1,012,751			—				—			1,019,064			1,019,064

Accrued interest receivable	4,127			—				—			4,127			4,127

Financial liabilities:
Deposits	1,151,268			—				—			1,152,806			1,152,806

Borrowings	195,000			—				196,298			—			196,298

On-balance sheet derivative financial instruments:
Interest rate swap agreements:
Assets	4,133			—				4,133			—			4,133

Liabilities	4,316			—				4,316			—			4,316



	Carrying			Fair Value
	Amount			Level 1				Level 2			Level 3			Total
	(In thousands)
31-Dec-13
Financial assets:
Cash and cash equivalents	$	40,316		$	40,316			$	—		$	—		$	40,316

Trading assets	750			—				750			—			750

Securities available for sale	441,306			208,437				232,869			—			441,306

Federal Home Loan Bank stock	10,766			—				—			10,766			10,766

Loans and loans held for sale	765,347			—				—			768,803			768,803

Accrued interest receivable	4,290			—				—			4,290			4,290

Financial liabilities:
Deposits	915,223			—				—			917,121			917,121

Borrowings	215,000			—				216,332			—			216,332

On-balance sheet derivative financial instruments:
Interest rate swap agreements:
Assets	2,487			—				2,487			—			2,487

Liabilities	2,393			—				2,393			—			2,393

Comprehensive_Income

Comprehensive Income	6 Months Ended
	Jun. 30, 2014
Equity [Abstract]	'
Comprehensive Income	'
	COMPREHENSIVE INCOME
	Accounting principles generally require that recognized revenues, expenses, gains and losses be included in net income. Although certain changes in assets and liabilities are reported as a separate component of equity on the consolidated balance sheets, such items, along with net income, are components of comprehensive income.
	The components of accumulated other comprehensive income, included in equity, are as follows:



		June 30,			December 31,
		2014			2013
		(In thousands)
	Securities available for sale:
	Net unrealized gain	$	10,862		$	2,838

	Tax effect	(3,872		)	(855		)
	Net-of-tax amount	6,990			1,983

	Defined benefit pension plan:
	Unrecognized net actuarial gain	803			803

	Tax effect	(321		)	(321		)
	Net-of-tax amount	482			482

		$	7,472		$	2,465

Regulatory_Capital

Regulatory Capital	6 Months Ended
	Jun. 30, 2014
Banking and Thrift [Abstract]	'
Regulatory Capital	'
	REGULATORY CAPITAL
	Minimum regulatory capital requirements
	The Company (on a consolidated basis) and the Bank are subject to various regulatory capital requirements administered by the federal banking agencies. Failure to meet minimum capital requirements can initiate certain mandatory, and possibly additional discretionary actions by regulators that, if undertaken, could have a direct material effect on the Company’s and the Bank’s consolidated financial statements. Under capital adequacy guidelines and the regulatory framework for prompt corrective action, the Company and the Bank must meet specific capital guidelines that involve quantitative measures of the their assets, liabilities, and certain off-balance sheet items as calculated under regulatory accounting practices. The capital amounts and classification are also subject to qualitative judgments by the regulators about components, risk weightings, and other factors. Prompt corrective action provisions are not applicable to bank holding companies.
	Quantitative measures established by regulation to ensure capital adequacy require the Company and the Bank to maintain minimum amounts and ratios of total and Tier 1 capital (as defined in the regulations) to risk-weighted assets (as defined), and of Tier 1 capital to average assets (as defined). Management believes, as of June 30, 2014 and December 31, 2013, that the Company and the Bank met all capital adequacy requirements to which they are subject.
	As of June 30, 2014, the most recent notification from the Federal Deposit Insurance Corporation categorized the Bank as well capitalized under the regulatory framework for prompt corrective action. To be categorized as well capitalized an institution must maintain minimum total risk-based, Tier 1 risk-based, and Tier 1 leverage ratios as set forth in the following table. There are no conditions or events since that notification that management believes have changed the Bank’s category.

	The Bank’s and the Company’s actual and minimum required capital amounts and ratios as of June 30, 2014 and December 31, 2013 are presented below.



		Actual				Minimum				Minimum
						Capital				To Be Well
						Requirement				Capitalized Under
										Prompt Corrective
										Action Provisions
		Amount		Ratio		Amount		Ratio		Amount		Ratio
		(Dollars in thousands)
	Hyde Park Bancorp, MHC:
	30-Jun-14
	Total capital (to risk weighted assets)	$	168,689	15.1	%	$	89,641	8	%	N/A		N/A

	Tier 1 capital (to risk weighted assets)	154,297		13.8		44,820		4		N/A		N/A

	Tier 1 capital (to average assets)	154,297		9		68,503		4		N/A		N/A

	31-Dec-13
	Total capital (to risk weighted assets)	$	178,090	19.8	%	$	71,870	8	%	N/A		N/A

	Tier 1 capital (to risk weighted assets)	166,316		18.5		35,935		4		N/A		N/A

	Tier 1 capital (to average assets)	166,316		13.2		50,541		4		N/A		N/A

	Blue Hills Bank:
	30-Jun-14
	Total capital (to risk weighted assets)	$	140,256	12.8	%	$	87,820	8	%	$	109,775	10	%

	Tier 1 capital (to risk weighted assets)	125,864		11.5		43,910		4		65,865		6

	Tier 1 capital (to average assets)	125,864		7.4		68,508		4		85,629		5

	31-Dec-13
	Total capital (to risk weighted assets)	$	148,872	16.6	%	$	71,864	8	%	$	89,831	10	%

	Tier 1 capital (to risk weighted assets)	137,099		15.3		35,932		4		53,898		6

	Tier 1 capital (to average assets)	137,099		11.1		49,370		4		61,712		5

Subsequent_Events

Subsequent Events	6 Months Ended
Subsequent Events	Jun. 30, 2014
Subsequent Events [Abstract]	'
Subsequent Events	'
	SUBSEQUENT EVENTS

	On July 11, 2014, the Company redeemed the $18,724,000 of Series A Preferred Stock issued to the U.S. Treasury under the Small Business Lending Fund (“SBLF”) preferred stock program. The redemption was completed with a payment to the U.S. Treasury of $18,724,000 plus accrued dividends.

	As described in Note 1, the Company adopted a Plan of Conversion on March 6, 2014, as amended on May 5, 2014, pursuant to which the Company converted from the mutual holding company to the stock holding company form of organization on July 21, 2014.

Basis_of_Presentation_and_Cons1

Basis of Presentation and Consolidation (Policies)	6 Months Ended
Basis of Presentation and Consolidation (Policies)	Jun. 30, 2014
Organization, Consolidation and Presentation of Financial Statements [Abstract]	'
Loans Policy	'
	Loan policies

	Loans that management has the intent and ability to hold for the foreseeable future or until maturity or pay-off generally are reported at their outstanding unpaid principal balances adjusted for the allowance for loan losses, charge-offs and any deferred fees and costs on originated and purchased loans. Interest income is accrued on the unpaid principal balance. Deferred loan origination fees/costs and discounts on purchased loans are recognized as an adjustment of the related loan yield using the interest method.
	It is the policy of the Company to discontinue the accrual of interest on loans past due in excess of 90 days, unless the loan is well-secured and in the process of collection, or when in the judgment of management, the ultimate collectability of the principal or interest becomes doubtful and to reverse all interest previously accrued against interest income. Past due status is based on contractual terms of the loan. The interest on non-accrual loans is accounted for on the cash-basis until qualifying for return to accrual. Loans are returned to accrual status when all the principal and interest amounts contractually due have been current for six consecutive months and future payments are reasonably assured.
Allowance for Loan Losses Policy	'
	Allowance for loan losses
	The allowance for loan losses is based on the size and the composition of the loan portfolio, delinquency levels, loss experience, economic conditions and other factors related to the collectability of the loan portfolio. Because 2013 and 2012 saw the growth in number and size of portfolios for which the Company had no prior loss experience, the loss experience extrapolated for all portfolios was derived from available national and state peer group losses for relevant portfolios generally over the years 2008-2013. Loan losses are charged against the allowance when management believes the uncollectability of a loan balance is confirmed. Subsequent recoveries, if any, are credited to the allowance.

	The allowance for loan losses is evaluated regularly by management and reflects consideration of all significant factors that affect the collectability of the loan portfolio. The evaluation is inherently subjective as it requires estimates that are susceptible to significant revision as more information becomes available; however, because of the increase in risk exposures new to the Company, it is the intention of management to maintain an allowance that is prudently commensurate with the growth in the loan portfolio.
	The allowance consists of general, allocated and unallocated components, as further described below.
	General component
	The general component of the allowance for loan losses is based on either actual or extrapolated historical loss experience for periods ranging from three to five years, adjusted for qualitative and environmental factors including levels/trends in delinquencies; trends in volumes 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.
	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 does not generally originate loans with a loan-to-value ratio greater than 80 percent and does not generally grant loans that would be classified as subprime upon origination. When the Company does extend credit either on a first- or second-lien basis at a loan-to-value ratio greater than 80 percent, such loans are supported by either mortgage insurance or state guarantee programs. All loans in this segment are collateralized by owner-occupied 1-4 family residential real estate and repayment is dependent on the credit quality of the individual borrower. The health of the regional economy, including unemployment rates and housing prices, will have an effect on the credit quality of loans in this segment.
	Home equity - Loans in this segment are generally secured by 1st or 2nd liens on residential real estate. Repayment is dependent on the credit quality of the individual borrower. The Company evaluates each loan application based on factors including the borrower’s credit score, income, length of employment, and other factors to establish the creditworthiness of the borrower. The Company purchased a geographically diverse portfolio of seasoned home equity lines of credit (HELOC) which are serviced by a third party. The rate of provision for this portfolio is slightly lower than that for the organically originated HELOC portfolio due to its seasoning, low loan-to-values, high credit scores, and first-lien collateral position.
	Commercial real estate - Loans in this segment include investment real estate and are generally secured by assignments of leases, real estate collateral and guarantees from sponsors or owners. In cases where there is a concentration of exposure to a single large tenant, underwriting standards include analysis of the tenant’s ability to support lease payments over the duration of the loan. 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. Payments on loans secured by income-producing properties often depend on the successful operation and management of the properties. Management continually monitors the cash flows of these loans.
	Construction - Loans in this segment primarily include speculative real estate development loans for which payment is derived from sale of the property. Credit risk is affected by cost overruns, time to sell at an adequate price, and market conditions.
	Consumer - Loans in this segment primarily include used auto loans. A significant portion of the used auto loan portfolio is comprised of geographically diverse loans originated by and purchased from a third party, who also provides collection services. While this portfolio has generated minimal charge-offs, the provisions for loan losses reflect management’s estimate of inherent losses based on a review of regional and national historical losses of other institutions with similar portfolios
	Commercial business - Loans in this segment are generally secured by business assets, including accounts receivable, inventory, real estate and intangible assets. Strict underwriting standards include considerations of the borrower’s ability to support the debt service requirements from the underlying historical and projected cash flows of the business, collateral values, the borrower’s credit history and the ultimate collectability of the debt. Economic conditions, real estate values, commodity prices, unemployment trends and other factors will affect the credit quality of loans in these segments.
	Allocated component
	The allocated component relates to loans that are on the watch list (non-accruing loans, partially charged-off non-accruing loans and accruing adversely-rated loans) and considered impaired. Impairment is measured 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 is lower than the carrying value of that loan.
	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. Management reviews all loan types for individual impairment. Factors considered by management in determining impairment include payment status, collateral value, and the probability of collecting scheduled principal and interest payments when due. Loans that experience insignificant payment delays and payment shortfalls generally are not classified as impaired. Management determines the significance of payment delays and payment shortfalls on a case-by-case basis, taking into consideration all of the circumstances surrounding the loan and the borrower, including the length of the delay, the reasons for the delay, the borrower’s prior payment record, and the amount of the shortfall in relation to the principal and interest owed.

	The Company periodically may agree to modify the contractual terms of loans. When a loan is modified and a concession is made to a borrower experiencing financial difficulty, the modification is considered a troubled debt restructuring (“TDR”). All TDRs are initially classified as impaired and generally remain impaired for the remaining life of the loan. Impaired classification may be removed if the borrower demonstrates compliance with the modified terms and the restructuring agreement specifies an interest rate equal to that which would be provided to a borrower with similar credit at the time of restructuring.
	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.

Acquisition_Tables

Acquisition (Tables)	6 Months Ended
	Jun. 30, 2014
Business Combinations [Abstract]	'
Schedule of Recognized Identified Assets Acquired and Liabilities Assumed	'
	The following table summarizes the estimated fair value of the assets acquired and liabilities assumed as of the date of the acquisition:


	Assets acquired:
	Cash	$	161,900

	Loans:
	Home equity	39,966

	Commercial real estate	57,967

	Commercial business	3,862

	Consumer	444

	Discount on purchased loans	(4,773		)
	Loans, net	97,466

	Premises and equipment, net	10,762

	Core deposit intangible	6,041

	Goodwill	9,182

	Accrued interest receivable	304

	Total assets acquired	285,655


	Liabilities assumed:
	Deposits:
	NOW and demand	107,241

	Regular savings	24,511

	Money market deposits	113,764

	Term certificates	29,085

	Total deposits	274,601

	Accrued expenses and other liabilities	741

	Total liabilities assumed	275,342


	Net purchase price	$	10,313

Securities_Available_for_Sale_

Securities Available for Sale (Tables)	6 Months Ended
	Jun. 30, 2014
Investments, Debt and Equity Securities [Abstract]	'
Available-for-sale Securities	'
	The amortized cost and estimated fair value of securities available for sale, with gross unrealized gains and losses, follows:


		Amortized				Gross			Gross				Fair
		Cost				Unrealized			Unrealized				Value
						Gains			Losses
		(In thousands)
	30-Jun-14
	Debt securities:
	U.S. Treasury	$	90,622			$	276		$	(1,319	)		$	89,579

	Government-sponsored enterprises	13,318				58			(20		)		13,356

	Government-sponsored mortgage-backed and collateralized mortgage obligations	70,142				981			(313		)		70,810

	Other mortgage- and asset-backed securities:

	Privately issued commercial mortgage-backed securities	24,412				95			(119		)		24,388

	Privately issued residential mortgage-backed securities	4,841				527			(1		)		5,367

	SBA asset-backed securities	16,133				142			(163		)		16,112

	Other asset-backed securities	12,029				23			(6		)		12,046

	Total other mortgage- and asset-backed securities	57,415				787			(289		)		57,913

	State and political subdivisions	23,542				539			(14		)		24,067

	Foreign government backed securities	4,049				22			—				4,071

	Financial services:

	Banks	17,837				733			(17		)		18,553

	Diversified financials	14,008				589			(5		)		14,592

	Insurance and REITs	14,959				468			—				15,427

	Total financial services	46,804				1,790			(22		)		48,572

	Other corporate:
	Industrials	42,489				1,016			(38		)		43,467

	Utilities	17,166				519			—				17,685

	Total other corporate	59,655				1,535			(38		)		61,152

	Total debt securities	365,547				5,988			(2,015		)		369,520


	Marketable equity securities:
	Mutual funds:
	Global equity	5,000				821			—				5,821

	Domestic community	3,216				70			(5		)		3,281

	Global asset allocation	32,956				6,003			—				38,959

	Total marketable equity securities	41,172				6,894			(5		)		48,061

	Total securities available for sale	$	406,719			$	12,882		$	(2,020	)		$	417,581




	Amortized				Gross			Gross				Fair
	Cost				Unrealized			Unrealized				Value
					Gains			Losses
	(In thousands)
31-Dec-13
Debt securities:
U.S. Treasury	$	131,781			$	145		$	(3,724	)		$	128,202

Government-sponsored enterprises	13,985				81			(109		)		13,957

Government-sponsored mortgage-backed and collateralized mortgage obligations	67,787				778			(1,072		)		67,493

Other mortgage- and asset-backed securities:
Privately issued commercial mortgage-backed securities	22,828				127			(281		)		22,674

Privately issued residential mortgage-backed securities	3,021				362			—				3,383

SBA asset-backed securities	9,787				—			(393		)		9,394

Other asset-backed securities	10,974				57			(9		)		11,022

Total other mortgage- and asset-backed securities	46,610				546			(683		)		46,473

State and political subdivisions	15,628				218			(107		)		15,739

Financial services:

Banks	12,535				889			(74		)		13,350

Diversified financials	14,023				557			(52		)		14,528

Insurance and REITs	15,635				250			(92		)		15,793

Total financial services	42,193				1,696			(218		)		43,671

Other corporate:
Industrials	32,920				842			(312		)		33,450

Utilities	12,000				286			(200		)		12,086

Total other corporate	44,920				1,128			(512		)		45,536

Total debt securities	362,904				4,592			(6,425		)		361,071


Marketable equity securities:
Mutual funds:
Global equity	5,000				540			—				5,540

Domestic community	3,216				48			(43		)		3,221

Global asset allocation	32,956				4,168			—				37,124

Diversified bonds	34,392				71			(113		)		34,350

Total marketable equity securities	75,564				4,827			(156		)		80,235

Total securities available for sale	$	438,468			$	9,419		$	(6,581	)		$	441,306

Investments Classified by Contractual Maturity Date	'
	The amortized cost and estimated fair value of debt securities by contractual maturity at June 30, 2014 follow. Expected maturities will differ from contractual maturities because the issuers may have the right to call or prepay obligations with or without call or prepayment penalties.


		Amortized				Fair
		Cost				Value
		(In thousands)
	Within 1 year	$	12,494			$	12,544

	After 1 year through 5 years	120,628				122,256

	After 5 years through 10 years	92,352				93,142

	After 10 years	12,516				12,855

		237,990				240,797

	Mortgage- and asset-backed securities and collateralized mortgage obligations	127,557				128,723

		$	365,547			$	369,520

Unrealized Gain (Loss) and Fair Value of Investments	'
	Information pertaining to securities available for sale with gross unrealized losses aggregated by investment category and length of time that individual securities have been in a continuous loss position, follows:


		Less Than Twelve Months							More Than Twelve Months
		Gross				Fair			Gross				Fair
		Unrealized				Value			Unrealized				Value
		Losses							Losses
		(In thousands)
	30-Jun-14
	Debt securities:
	U.S. Treasury	$	(13	)		$	6,809		$	(1,306	)		$	56,288

	Government-sponsored enterprises	—				—			(20		)		1,076

	Government-sponsored mortgage-backed and collateralized mortgage obligations	—				—			(313		)		21,988

	Other mortgage- and asset-backed securities:
	Privately issued commercial mortgage- backed securities	(20		)		6,041			(99		)		8,939

	Privately issued residential mortgage-backed securities	(1		)		803			—				—

	SBA asset-backed securities	—				—			(163		)		4,210

	Other asset-backed securities	(6		)		3,260			—

	Total other mortgage- and asset-backed securities	(27		)		10,104			(262		)		13,149

	State and political subdivisions	(3		)		989			(11		)		687

	Financial services:
	Banks	—				—			(17		)		680

	Diversified financials	(5		)		1,093			—				—

	Total financial services	(5		)		1,093			(17		)		680

	Other corporate:
	Industrials	(25		)		6,127			(13		)		2,718

	Total debt securities	(73		)		25,122			(1,942		)		96,586

	Marketable equity securities:
	Mutual funds:
	Domestic community	—				—			(5		)		461

	Total marketable equity securities	—				—			(5		)		461

	Total temporarily impaired securities	$	(73	)		$	25,122		$	(1,947	)		$	97,047



		Less Than Twelve Months							More Than Twelve Months
		Gross				Fair			Gross				Fair
		Unrealized				Value			Unrealized				Value
		Losses							Losses
		(In thousands)
	31-Dec-13
	Debt securities:
	U.S. Treasury	$	(3,724	)		$	117,043		$	—			$	—

	Government-sponsored enterprises	(109		)		3,920			—				—

	Government-sponsored mortgage-backed and collateralized mortgage obligations	(973		)		37,265			(99		)		3,341

Other mortgage- and asset-backed securities:
Privately issued commercial mortgage- backed securities	(130		)		10,926			(151		)		4,153

SBA asset-backed securities	(393		)		8,499			—				—

Other asset-backed securities	(9		)		7,809			—				—

Total other mortgage- and asset-backed securities	(532		)		27,234			(151		)		4,153

State and political subdivisions	(107		)		5,904							—

Financial services:
Banks	(74		)		1,773			—				—

Diversified financials	(52		)		1,380			—				—

Insurance and REITs	(92		)		5,466			—				—

Total financial services	(218		)		8,619			—				—

Other corporate:
Industrials	(312		)		10,947			—				—

Utilities	(200		)		12,671			—				—

Total other corporate	(512		)		23,618			—				—

Total debt securities	(6,175		)		223,603			(250		)		7,494

Marketable equity securities:
Mutual funds:
Domestic community	(30		)		2,767			(13		)		453

Diversified bonds	(109		)		21,450			(4		)		71

Total marketable equity securities	(139		)		24,217			(17		)		524

Total temporarily impaired securities	$	(6,314	)		$	247,820		$	(267	)		$	8,018

Loans_and_The_Allowance_for_Lo1

Loans and The Allowance for Loan Loss (Tables)	6 Months Ended
	Jun. 30, 2014
Receivables [Abstract]	'
Schedule of Accounts, Notes, Loans and Financing Receivable	'
	A summary of the balances of loans follows:



		June 30,				December 31,
		2014				2013
		(In thousands)
	Real estate:
	1-4 family residential	$	407,142			$	364,932

	Home equity	62,900				25,535

	Commercial real estate	337,643				228,688

	Construction	45,348				16,559

		853,033				635,714

	Commercial business	120,481				111,154

	Consumer	29,550				25,372

	Total loans	1,003,064				772,240

	Allowance for loan losses	(11,292		)		(9,671		)
	Discount on purchased loans	(4,226		)		(340		)
	Deferred loan costs and fees, net	2,807				2,343

	Loans, net	$	990,353			$	764,572

Activity in Allowance for Loan Losses	'
	Activity in the allowance for loan losses for the three and six months months ended June 30, 2014 and 2013 and allocation of the allowance to loan segments as of June 30, 2014 and December 31, 2013 follows:



		1-4 Family				Home			Commercial		Construction		Commercial		Consumer			Unallocated			Total
		Residential				Equity			Real Estate				Business
		(In thousands)
	Three Months Ended June 30, 2014

	Allowance at March 31, 2014	$	2,887			$	268		$	2,928	$	414	$	2,589	$	602		$	658		$	10,346

	Provision for loan losses	201				37			314		285		66		56			—			959

	Loans charged-off	—				—			—		—		—		(13		)	—			(13		)

	Recoveries	—				—			—		—		—		—			—			—

	Allowance at June 30, 2014	$	3,088			$	305		$	3,242	$	699	$	2,655	$	645		$	658		$	11,292





	Three Months Ended June 30, 2013
	Allowance at March 31, 2013	$	2,548			$	321		$	1,653	$	115	$	476	$	362		$	919		$	6,394

	Provision (credit) for loan losses	(269		)		8			279		78		1,025		54			(83		)	1,092

	Loans charged-off	(5		)		—			—		—		—		(15		)	—			(20		)

	Recoveries	156				—			—		—		—		—			—			156

	Allowance at June 30, 2013	$	2,430			$	329		$	1,932	$	193	$	1,501	$	401		$	836		$	7,622




		1-4 Family				Home			Commercial		Construction		Commercial		Consumer			Unallocated			Total
		Residential				Equity			Real Estate				Business
		(In thousands)
	Six Months Ended June 30, 2014
	Allowance at December 31, 2013	$	2,835			$	247		$	2,608	$	303	$	2,416	$	574		$	688		$	9,671

	Provision (credit) for loan losses	271				58			634		396		239		105			(30		)	1,673

	Loans charged-off	(18		)		—			—		—		—		(34		)	—			(52		)

	Recoveries	—				—			—		—		—		—			—			—

	Allowance at June 30, 2014	$	3,088			$	305		$	3,242	$	699	$	2,655	$	645		$	658		$	11,292



	Six Months Ended June 30, 2013
	Allowance at December 31, 2012	$	2,725			$	316		$	1,343	$	106	$	565	$	313		$	182		$	5,550

	Provision (credit) for loan losses	(433		)		13			589		87		936		110			654			1,956

	Loans charged-off	(98		)		—			—		—		—		(22		)	—			(120		)

	Recoveries	236				—			—		—		—		—			—			236

	Allowance at June 30, 2013	$	2,430			$	329		$	1,932	$	193	$	1,501	$	401		$	836		$	7,622

Allowance for Credit Losses on Financing Receivables	'
	Additional information pertaining to the allowance for loan losses at June 30, 2014 and December 31, 2013 is as follows:


		1-4 Family				Home			Commercial		Construction		Commercial		Consumer			Unallocated			Total
		Residential				Equity			Real Estate				Business
		(In thousands)
	June 30, 2014
	Allowance related to impaired loans	$	—			$	—		$	—	$	—	$	—	$	—		$	—		$	—

	Allowance related to non-impaired loans	3,088				305			3,242		699		2,655		645			658			11,292

	Total allowance for loan losses	$	3,088			$	305		$	3,242	$	699	$	2,655	$	645		$	658		$	11,292

	Impaired loans	$	4,202			$	807		$	—	$	—	$	—	$	48		$	—		$	5,057

	Non-impaired loans	402,940				62,093			337,643		45,348		120,481		29,502			—			998,007

	Total loans	$	407,142			$	62,900		$	337,643	$	45,348	$	120,481	$	29,550		$	—		$	1,003,064

	31-Dec-13
	Allowance related to impaired loans	$	—			$	—		$	—	$	—	$	—	$	—		$	—		$	—

	Allowance related to non-impaired loans	2,835				247			2,608		303		2,416		574			688			9,671

	Total allowance for loan losses	$	2,835			$	247		$	2,608	$	303	$	2,416	$	574		$	688		$	9,671

	Impaired loans	$	3,118			$	36		—		$	—	$	—	$	—		$	—		$	3,154

	Non-impaired loans	361,814				25,499			228,688		16,559		111,154		25,372			—			769,086

	Total loans	$	364,932			$	25,535		$	228,688	$	16,559	$	111,154	$	25,372		$	—		$	772,240

Past Due Financing Receivables	'
	The following is a summary of past due and non-accrual loans, by loan class, at June 30, 2014 and December 31, 2013:



		30-59 Days				60-89 Days			Past Due 90		Total		Loans on
		Past Due				Past Due			Days or More		Past Due		Non-accrual
		(In thousands)
	June 30, 2014
	Real estate:
	1-4 family residential	$	2,359			$	—		$	1,131	$	3,490	$	3,647

	Home equity	205				—			563		768		807

	Consumer	10				18			—		28		48

	Total	$	2,574			$	18		$	1,694	$	4,286	$	4,502




	December 31, 2013
	Real estate:
	1-4 family residential	$	1,426			$	196		$	828	$	2,450	$	1,706

	Home equity	—				—			36		36		36

	Total	$	1,426			$	196		$	864	$	2,486	$	1,742

Impaired Financing Receivables	'
	The following is a summary of information pertaining to impaired loans by loan segment at the dates indicated:



		Recorded				Unpaid			Related
		Investment				Principal			Allowance
						Balance
	June 30, 2014
	Impaired loans without a valuation allowance:
	Real estate:
	1-4 family residential	$	4,202			$	4,994		$	—

	Home equity	807				1,066			—

	Consumer	48				48			—

	Total	$	5,057			$	6,108		$	—


	December 31, 2013
	Impaired loans without a valuation allowance:
	Real estate:
	1-4 family residential	$	3,118			$	3,893		$	—

	Consumer loans	36				36			—

	Total	$	3,154			$	3,929		$	—


	The following tables set forth information regarding average balances and interest income recognized on impaired loans by segment, for the periods indicated:



		Average				Interest
		Recorded				Income
		Investment				Recognized
	Three Months Ended June 30, 2014
	Real estate:
	1-4 family residential	$	3,753			$	49

	Home equity	683				—

	Commercial business	276				—

	Consumer	29				—

	Total	$	4,741			$	49


	Three Months Ended June 30, 2013
	Real estate:
	1-4 family residential	$	2,369			$	39

	Consumer	18				—

	Total	$	2,387			$	39




		Average				Interest
		Recorded				Income
		Investment				Recognized
Six Months Ended June 30, 2014
Real estate:
1-4 family residential	$	3,241			$	83

Home equity	455				4

Commercial business	184				4

Consumer	19				—

Total	$	3,899			$	91


Six Months Ended June 30, 2013
Real estate:
1-4 family residential	$	2,171			$	65

Consumer	12				1

Total	$	2,183			$	66

Financing Receivable Credit Quality Indicators	'
	The following tables present the Company’s loans by risk rating at June 30, 2014 and December 31, 2013:



		1-4 Family				Home			Commercial		Construction		Commercial		Consumer			Total
		Residential				Equity			Real Estate				Business					Loans
		(In thousands)
	June 30, 2014
	Loans rated 1 - 6	$	3,422			$	518		$	336,522	$	45,348	$	109,945	$	123		$	495,878

	Loans rated 7	2,935				1,190			1,121		—		10,536		2			15,784

	Loans rated 8 - 9	1,350				—			—		—		—		48			1,398

	Loans rated 10	693				—			—		—		—		—			693

	Loans not rated	398,742				61,192			—		—		—		29,377			489,311

		$	407,142			$	62,900		$	337,643	$	45,348	$	120,481	$	29,550		$	1,003,064

	31-Dec-13
	Loans rated 1 - 6	$	1,701			$	4,610		$	223,144	$	15,246	$	110,142	$	—		$	354,843

	Loans rated 7	468				—			2,339		—		12		—			2,819

	Loans rated 8 - 9	1,647				36			—		—		—		24			1,707

	Loans rated 10	693				—			—		—		—		—			693

	Loans not rated	360,423				20,889			3,205		1,313		1,000		25,348			412,178

		$	364,932			$	25,535		$	228,688	$	16,559	$	111,154	$	25,372		$	772,240

Interest_Rate_Swap_Agreements_

Interest Rate Swap Agreements (Tables)	6 Months Ended
	Jun. 30, 2014
Derivative Instruments and Hedging Activities Disclosure [Abstract]	'
Schedule of Interest Rate Derivatives	'
	The table below presents information about derivative financial instruments not designated as hedging instruments at June 30, 2014 and and December 31, 2013.


		Derivative Gains				Derivative Losses
		Notional		Fair		Notional		Fair
		Amount		Value		Amount		Value
		(In thousands)
	30-Jun-14
	Economic hedges:
	Commercial loan level interest rate swap agreements	$	184,973	$	4,126	$	184,973	$	4,299

	Other contracts	8,774		7		7,922		17

	Total derivatives	$	193,747	$	4,133	$	192,895	$	4,316

	31-Dec-13
	Economic hedges:
	Commercial loan level interest rate swap agreements	$	171,747	$	2,482	$	171,747	$	2,379

	Other contracts	8,932		5		7,988		14

	Total derivatives	$	180,679	$	2,487	$	179,735	$	2,393

Deposits_Tables

Deposits (Tables)	6 Months Ended
	Jun. 30, 2014
Banking and Thrift [Abstract]	'
Schedule of Deposit Balances	'
	A summary of deposit balances, by type, is as follows:


		June 30,		December 31,
		2014		2013
		(In thousands)
	NOW and demand	$	237,586	$	118,648

	Regular savings	343,697		332,518

	Money market deposits	195,264		75,716

	Total non-certificate accounts	776,547		526,882


	Certificates of deposit	293,516		296,718

	Brokered deposits	81,205		91,623

	Total certificate accounts	374,721		388,341

	Total deposits	$	1,151,268	$	915,223

Schedule of Contractual Maturities of Deposits and Weighted Average Rate	'
	At June 30, 2014, the scheduled maturities of term certificate accounts, including brokered deposits, are as follows:


		Amount		Weighted
				Average
				Rate
		(Dollars in thousands)
	Within 1 year	$	272,211	0.62	%

	1-2 years	47,301		1.41

	2-3 years	35,331		1.31

	3-4 years	10,647		1.18

	4 years and beyond	9,231		1.14

		$	374,721	0.82	%

Fair_Value_Measurements_Tables

Fair Value Measurements (Tables)	6 Months Ended
	Jun. 30, 2014
Fair Value Disclosures [Abstract]	'
Schedule of Fair Value, Assets and Liabilities Measured on Recurring Basis	'
	Assets and liabilities measured at fair value on a recurring basis are summarized below:



		Level 1			Level 2				Level 3		Total
											Fair Value
		(In thousands)
	30-Jun-14
	Assets
	Securities available for sale:
	Debt securities	$	89,579		$	279,941			$	—	$	369,520

	Marketable equity securities	48,061			—				—		48,061

	Derivative assets	—			4,133				—		4,133

	Total assets	$	137,640		$	284,074			$	—	$	421,714

	Liabilities
	Derivative liabilities	$	—		$	4,316			$	—	$	4,316


	31-Dec-13
	Assets
	Trading assets	$	—		$	750			$	—	$	750

	Securities available for sale:
	Debt securities	128,202			232,869				—		361,071

	Marketable equity securities	80,235			—				—		80,235

	Derivative assets	—			2,487				—		2,487

	Total assets	$	208,437		$	236,106			$	—	$	444,543

	Liabilities
	Derivative liabilities	$	—		$	2,393			$	—	$	2,393

	Total liabilities	$	—		$	2,393			$	—	$	2,393

Fair Value Measurements, Nonrecurring	'
	The following tables summarize losses and fair value hierarcy applicable to assets mesarued at fair value on a non-recurring basis:



		At June 30, 2014					Three months ended June 30, 2014	Six months ended June 30, 2014
		Level 1		Level 2	Level 3		Total Losses
		(In thousands)
	Impaired loans	$—		$—	$1,197		$—	$18
Fair Value, by Balance Sheet Grouping	'


		Carrying			Fair Value
		Amount			Level 1				Level 2		Level 3		Total
		(In thousands)
	30-Jun-14
	Financial assets:
	Cash and cash equivalents	$	296,926		$	296,926			$	—	$	—	$	296,926

	Securities available for sale	417,581			137,640				279,941		—		417,581

	Federal Home Loan Bank stock	11,702			—				—		11,702		11,702

	Loans and loans held for sale	1,012,751			—				—		1,019,064		1,019,064

	Accrued interest receivable	4,127			—				—		4,127		4,127

	Financial liabilities:
	Deposits	1,151,268			—				—		1,152,806		1,152,806

	Borrowings	195,000			—				196,298		—		196,298

	On-balance sheet derivative financial instruments:
	Interest rate swap agreements:
	Assets	4,133			—				4,133		—		4,133

	Liabilities	4,316			—				4,316		—		4,316



		Carrying			Fair Value
		Amount			Level 1				Level 2		Level 3		Total
		(In thousands)
	31-Dec-13
	Financial assets:
	Cash and cash equivalents	$	40,316		$	40,316			$	—	$	—	$	40,316

	Trading assets	750			—				750		—		750

	Securities available for sale	441,306			208,437				232,869		—		441,306

	Federal Home Loan Bank stock	10,766			—				—		10,766		10,766

	Loans and loans held for sale	765,347			—				—		768,803		768,803

	Accrued interest receivable	4,290			—				—		4,290		4,290

	Financial liabilities:
	Deposits	915,223			—				—		917,121		917,121

	Borrowings	215,000			—				216,332		—		216,332

	On-balance sheet derivative financial instruments:
	Interest rate swap agreements:
	Assets	2,487			—				2,487		—		2,487

	Liabilities	2,393			—				2,393		—		2,393

Comprehensive_Income_Tables

Comprehensive Income (Tables)	6 Months Ended
	Jun. 30, 2014
Equity [Abstract]	'
Schedule of Accumulated Other Comprehensive Income (Loss)	'
	The components of accumulated other comprehensive income, included in equity, are as follows:



		June 30,			December 31,
		2014			2013
		(In thousands)
	Securities available for sale:
	Net unrealized gain	$	10,862		$	2,838

	Tax effect	(3,872		)	(855		)
	Net-of-tax amount	6,990			1,983

	Defined benefit pension plan:
	Unrecognized net actuarial gain	803			803

	Tax effect	(321		)	(321		)
	Net-of-tax amount	482			482

		$	7,472		$	2,465

Regulatory_Capital_Tables

Regulatory Capital (Tables)	6 Months Ended
	Jun. 30, 2014
Banking and Thrift [Abstract]	'
Schedule of Compliance with Regulatory Capital Requirements under Banking Regulations	'
	The Bank’s and the Company’s actual and minimum required capital amounts and ratios as of June 30, 2014 and December 31, 2013 are presented below.



		Actual				Minimum				Minimum
						Capital				To Be Well
						Requirement				Capitalized Under
										Prompt Corrective
										Action Provisions
		Amount		Ratio		Amount		Ratio		Amount		Ratio
		(Dollars in thousands)
	Hyde Park Bancorp, MHC:
	30-Jun-14
	Total capital (to risk weighted assets)	$	168,689	15.1	%	$	89,641	8	%	N/A		N/A

	Tier 1 capital (to risk weighted assets)	154,297		13.8		44,820		4		N/A		N/A

	Tier 1 capital (to average assets)	154,297		9		68,503		4		N/A		N/A

	31-Dec-13
	Total capital (to risk weighted assets)	$	178,090	19.8	%	$	71,870	8	%	N/A		N/A

	Tier 1 capital (to risk weighted assets)	166,316		18.5		35,935		4		N/A		N/A

	Tier 1 capital (to average assets)	166,316		13.2		50,541		4		N/A		N/A

	Blue Hills Bank:
	30-Jun-14
	Total capital (to risk weighted assets)	$	140,256	12.8	%	$	87,820	8	%	$	109,775	10	%

	Tier 1 capital (to risk weighted assets)	125,864		11.5		43,910		4		65,865		6

	Tier 1 capital (to average assets)	125,864		7.4		68,508		4		85,629		5

	31-Dec-13
	Total capital (to risk weighted assets)	$	148,872	16.6	%	$	71,864	8	%	$	89,831	10	%

	Tier 1 capital (to risk weighted assets)	137,099		15.3		35,932		4		53,898		6

	Tier 1 capital (to average assets)	137,099		11.1		49,370		4		61,712		5

Plan_of_Conversion_Details

Plan of Conversion (Details) (USD $)	0 Months Ended	6 Months Ended		0 Months Ended	1 Months Ended
	5-May-14	Jun. 30, 2014	5-May-14	Mar. 06, 2014	Jul. 31, 2014
				Blue Hills Bank Foundation	Subsequent Event
					Blue Hills Bank Foundation
Subsidiary or Equity Method Investee [Line Items]	'	'	'	'	'
New shares issued during period (shares)	27,772,500	'	'	694,313	'
Shares issued (in dollars per share)	'	'	$10	'	'
Proceeds from issuance of common stock	$277,725,000	'	'	'	'
Employee stock purchase plans, shares	2,277,345	'	'	'	'
Plan of Conversion, Deferred Finance Costs, Gross	'	777,000	'	'	'
Organization Conversion Costs	'	818,000	'	'	'
Capital contribution to affiliate	'	'	'	7,000,000	'
Cash payment to affiliate	'	'	'	'	$57,000

Basis_of_Presentation_and_Cons2

Basis of Presentation and Consolidation (Details)	6 Months Ended
Basis of Presentation and Consolidation (Details)	Jun. 30, 2014
Blue Hills Bank	'
Subsidiary or Equity Method Investee [Line Items]	'
Number of subsidiaries	2
Minimum	'
Subsidiary or Equity Method Investee [Line Items]	'
Allowance for credit losses, general component, loss period used in calculation	'3 years
Maximum	'
Subsidiary or Equity Method Investee [Line Items]	'
Allowance for credit losses, general component, loss period used in calculation	'5 years
1-4 Family Residential	'
Subsidiary or Equity Method Investee [Line Items]	'
Origination covenants, maximum loan-to-value ratio	80.00%

Acquisition_Narrative_Details

Acquisition - Narrative (Details) (USD $)	3 Months Ended		6 Months Ended		0 Months Ended	3 Months Ended	6 Months Ended	3 Months Ended	6 Months Ended
	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013	Jan. 18, 2014	Jun. 30, 2014	Jun. 30, 2014	Jun. 30, 2014	Jun. 30, 2014
					Nantucket Bank	Nantucket Bank	Nantucket Bank	Nantucket Bank	Nantucket Bank
					bank_branch			Certificates of Deposit	Certificates of Deposit
Business Acquisition [Line Items]	'	'	'	'	'	'	'	'	'
Number of bank branches acquired	'	'	'	'	3	'	'	'	'
Purchase price	'	'	'	'	$10,300,000	'	'	'	'
Cash from acquisition	'	'	151,587,000	0	151,600,000	'	'	'	'
Business acquisition, transaction costs	'	'	'	'	'	149,000	947,000	'	'
Discount on purchased loans	'	'	'	'	4,773,000	'	'	'	'
Interest income attributable to accretion of discount on acquired loans	'	'	'	'	'	722,000	855,000	'	'
Amortization of core deposit intangible	509,000	0	862,000	0	'	509,000	862,000	'	'
Estimated fair value adjustment	'	'	'	'	'	'	'	'	137,000
Accretion expense	'	'	'	'	'	'	'	$57,000	$114,000

Acquisition_Business_Acquisiti

Acquisition - Business Acquisition Table (Details) (USD $)	Jun. 30, 2014	Dec. 31, 2013	Jan. 18, 2014	Jan. 18, 2014	Jan. 18, 2014	Jan. 18, 2014	Jan. 18, 2014
In Thousands, unless otherwise specified			Nantucket Bank	Home Equity	Commercial Real Estate	Commercial Loan	Consumer Loan
				Nantucket Bank	Nantucket Bank	Nantucket Bank	Nantucket Bank
Assets acquired:	'	'	'	'	'	'	'
Cash	'	'	$161,900	'	'	'	'
Loans, gross	'	'	'	39,966	57,967	3,862	444
Discount on purchased loans	'	'	-4,773	'	'	'	'
Loans, net	'	'	97,466	'	'	'	'
Premises and equipment, net	'	'	10,762	'	'	'	'
Core deposit intangible	'	'	6,041	'	'	'	'
Goodwill	9,182	0	9,182	'	'	'	'
Accrued interest receivable	'	'	304	'	'	'	'
Total assets acquired	'	'	285,655	'	'	'	'
Deposits:	'	'	'	'	'	'	'
NOW and demand	'	'	107,241	'	'	'	'
Regular savings	'	'	24,511	'	'	'	'
Money market deposits	'	'	113,764	'	'	'	'
Term certificates	'	'	29,085	'	'	'	'
Total deposits	'	'	274,601	'	'	'	'
Accrued expenses and other liabilities	'	'	741	'	'	'	'
Total liabilities assumed	'	'	275,342	'	'	'	'
Net purchase price	'	'	$10,313	'	'	'	'

Securities_Available_for_Sale_1

Securities Available for Sale - Available-for-sale Securities (Details) (USD $)	Jun. 30, 2014	Dec. 31, 2013
In Thousands, unless otherwise specified	Jun. 30, 2014	Dec. 31, 2013
Debt securities:	'	'
Amortized Cost	$365,547	$362,904
Gross Unrealized Gains	5,988	4,592
Gross Unrealized Losses	-2,015	-6,425
Fair Value	369,520	361,071
Marketable equity securities:	'	'
Amortized Cost	41,172	75,564
Gross Unrealized Gains	6,894	4,827
Gross Unrealized Losses	-5	-156
Fair Value	48,061	80,235
Available-for-sale securities:	'	'
Amortized Cost	406,719	438,468
Gross Unrealized Gains	12,882	9,419
Gross Unrealized Losses	-2,020	-6,581
Fair Value	417,581	441,306
U.S. Treasury	'	'
Debt securities:	'	'
Amortized Cost	90,622	131,781
Gross Unrealized Gains	276	145
Gross Unrealized Losses	-1,319	-3,724
Fair Value	89,579	128,202
Government-sponsored enterprises	'	'
Debt securities:	'	'
Amortized Cost	13,318	13,985
Gross Unrealized Gains	58	81
Gross Unrealized Losses	-20	-109
Fair Value	13,356	13,957
Government-sponsored mortgage-backed and collateralized mortgage obligations	'	'
Debt securities:	'	'
Amortized Cost	70,142	67,787
Gross Unrealized Gains	981	778
Gross Unrealized Losses	-313	-1,072
Fair Value	70,810	67,493
Privately issued commercial mortgage- backed securities	'	'
Debt securities:	'	'
Amortized Cost	24,412	22,828
Gross Unrealized Gains	95	127
Gross Unrealized Losses	-119	-281
Fair Value	24,388	22,674
Privately issued residential mortgage-backed securities	'	'
Debt securities:	'	'
Amortized Cost	4,841	3,021
Gross Unrealized Gains	527	362
Gross Unrealized Losses	-1	0
Fair Value	5,367	3,383
SBA asset-backed securities	'	'
Debt securities:	'	'
Amortized Cost	16,133	9,787
Gross Unrealized Gains	142	0
Gross Unrealized Losses	-163	-393
Fair Value	16,112	9,394
Other asset-backed securities	'	'
Debt securities:	'	'
Amortized Cost	12,029	10,974
Gross Unrealized Gains	23	57
Gross Unrealized Losses	-6	-9
Fair Value	12,046	11,022
Total other mortgage- and asset-backed securities	'	'
Debt securities:	'	'
Amortized Cost	57,415	46,610
Gross Unrealized Gains	787	546
Gross Unrealized Losses	-289	-683
Fair Value	57,913	46,473
State and political	'	'
Debt securities:	'	'
Amortized Cost	23,542	15,628
Gross Unrealized Gains	539	218
Gross Unrealized Losses	-14	-107
Fair Value	24,067	15,739
Other Debt Obligations	'	'
Debt securities:	'	'
Amortized Cost	4,049	'
Gross Unrealized Gains	22	'
Gross Unrealized Losses	0	'
Fair Value	4,071	'
Global Equity	'	'
Marketable equity securities:	'	'
Amortized Cost	5,000	5,000
Gross Unrealized Gains	821	540
Gross Unrealized Losses	0	0
Fair Value	5,821	5,540
Domestic community	'	'
Marketable equity securities:	'	'
Amortized Cost	3,216	3,216
Gross Unrealized Gains	70	48
Gross Unrealized Losses	-5	-43
Fair Value	3,281	3,221
Global asset allocation	'	'
Marketable equity securities:	'	'
Amortized Cost	32,956	32,956
Gross Unrealized Gains	6,003	4,168
Gross Unrealized Losses	0	0
Fair Value	38,959	37,124
Diversified bonds	'	'
Marketable equity securities:	'	'
Amortized Cost	'	34,392
Gross Unrealized Gains	'	71
Gross Unrealized Losses	'	-113
Fair Value	'	34,350
Financial Services \| Corporate debt securities	'	'
Debt securities:	'	'
Amortized Cost	46,804	42,193
Gross Unrealized Gains	1,790	1,696
Gross Unrealized Losses	-22	-218
Fair Value	48,572	43,671
Banks \| Corporate debt securities	'	'
Debt securities:	'	'
Amortized Cost	17,837	12,535
Gross Unrealized Gains	733	889
Gross Unrealized Losses	-17	-74
Fair Value	18,553	13,350
Diversified Financials \| Corporate debt securities	'	'
Debt securities:	'	'
Amortized Cost	14,008	14,023
Gross Unrealized Gains	589	557
Gross Unrealized Losses	-5	-52
Fair Value	14,592	14,528
Insurance and REITs \| Corporate debt securities	'	'
Debt securities:	'	'
Amortized Cost	14,959	15,635
Gross Unrealized Gains	468	250
Gross Unrealized Losses	0	-92
Fair Value	15,427	15,793
Other Corporate \| Corporate debt securities	'	'
Debt securities:	'	'
Amortized Cost	59,655	44,920
Gross Unrealized Gains	1,535	1,128
Gross Unrealized Losses	-38	-512
Fair Value	61,152	45,536
Industrials \| Corporate debt securities	'	'
Debt securities:	'	'
Amortized Cost	42,489	32,920
Gross Unrealized Gains	1,016	842
Gross Unrealized Losses	-38	-312
Fair Value	43,467	33,450
Utilities \| Corporate debt securities	'	'
Debt securities:	'	'
Amortized Cost	17,166	12,000
Gross Unrealized Gains	519	286
Gross Unrealized Losses	0	-200
Fair Value	$17,685	$12,086

Securities_Available_for_Sale_2

Securities Available for Sale - Schedule of Contractual Maturities of Securities (Details) (USD $)	Jun. 30, 2014	Dec. 31, 2013
In Thousands, unless otherwise specified	Jun. 30, 2014	Dec. 31, 2013
Available-for-sale Securities, Amortized Cost Basis [Abstract]	'	'
Within 1 year	$12,494	'
After 1 year through 5 years	120,628	'
After 5 years through 10 years	92,352	'
After 10 years	12,516	'
Single Maturity Date, amortized cost basis	237,990	'
Mortgage- and asset-backed securities and collateralized mortgage obligations - Amortized Basis	127,557	'
Amortized Cost	365,547	362,904
Available-for-sale Securities, Debt Maturities, Fair Value, Fiscal Year Maturity [Abstract]	'	'
Within 1 year	12,544	'
After 1 year through 5 years	122,256	'
After 5 years through 10 years	93,142	'
After 10 years	12,855	'
Single Maturity Date	240,797	'
Mortgage- and asset-backed securities and collateralized mortgage obligations - Fair Value	128,723	'
Available-for-sale securities, total debt securities	$369,520	$361,071

Securities_Available_for_Sale_3

Securities Available for Sale - Available-for-sale Securities Unrealized Loss (Details) (USD $)	Jun. 30, 2014	Dec. 31, 2013
In Thousands, unless otherwise specified	Jun. 30, 2014	Dec. 31, 2013
Available-for-sale Securities, Continuous Unrealized Loss Position, Aggregate Loss [Abstract]	'	'
Gross Unrealized Losses - Less than twelve months	($73)	($6,314)
Gross Unrealized Losses - More than twelve months	-1,947	-267
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value [Abstract]	'	'
Fair Value - Less than twelve months	25,122	247,820
Fair Value - More than twelve months	97,047	8,018
Total debt securities	'	'
Available-for-sale Securities, Continuous Unrealized Loss Position, Aggregate Loss [Abstract]	'	'
Gross Unrealized Losses - Less than twelve months	-73	-6,175
Gross Unrealized Losses - More than twelve months	-1,942	-250
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value [Abstract]	'	'
Fair Value - Less than twelve months	25,122	223,603
Fair Value - More than twelve months	96,586	7,494
U.S. Treasury	'	'
Available-for-sale Securities, Continuous Unrealized Loss Position, Aggregate Loss [Abstract]	'	'
Gross Unrealized Losses - Less than twelve months	-13	-3,724
Gross Unrealized Losses - More than twelve months	-1,306	0
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value [Abstract]	'	'
Fair Value - Less than twelve months	6,809	117,043
Fair Value - More than twelve months	56,288	0
Government-sponsored enterprises	'	'
Available-for-sale Securities, Continuous Unrealized Loss Position, Aggregate Loss [Abstract]	'	'
Gross Unrealized Losses - Less than twelve months	0	-109
Gross Unrealized Losses - More than twelve months	-20	0
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value [Abstract]	'	'
Fair Value - Less than twelve months	0	3,920
Fair Value - More than twelve months	1,076	0
Government-sponsored mortgage-backed and collateralized mortgage obligations	'	'
Available-for-sale Securities, Continuous Unrealized Loss Position, Aggregate Loss [Abstract]	'	'
Gross Unrealized Losses - Less than twelve months	0	-973
Gross Unrealized Losses - More than twelve months	-313	-99
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value [Abstract]	'	'
Fair Value - Less than twelve months	0	37,265
Fair Value - More than twelve months	21,988	3,341
Privately issued commercial mortgage- backed securities	'	'
Available-for-sale Securities, Continuous Unrealized Loss Position, Aggregate Loss [Abstract]	'	'
Gross Unrealized Losses - Less than twelve months	-20	-130
Gross Unrealized Losses - More than twelve months	-99	-151
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value [Abstract]	'	'
Fair Value - Less than twelve months	6,041	10,926
Fair Value - More than twelve months	8,939	4,153
Privately issued residential mortgage-backed securities	'	'
Available-for-sale Securities, Continuous Unrealized Loss Position, Aggregate Loss [Abstract]	'	'
Gross Unrealized Losses - Less than twelve months	-1	'
Gross Unrealized Losses - More than twelve months	0	'
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value [Abstract]	'	'
Fair Value - Less than twelve months	803	'
Fair Value - More than twelve months	0	'
SBA asset-backed securities	'	'
Available-for-sale Securities, Continuous Unrealized Loss Position, Aggregate Loss [Abstract]	'	'
Gross Unrealized Losses - Less than twelve months	0	-393
Gross Unrealized Losses - More than twelve months	-163	0
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value [Abstract]	'	'
Fair Value - Less than twelve months	0	8,499
Fair Value - More than twelve months	4,210	0
Other asset-backed securities	'	'
Available-for-sale Securities, Continuous Unrealized Loss Position, Aggregate Loss [Abstract]	'	'
Gross Unrealized Losses - Less than twelve months	-6	-9
Gross Unrealized Losses - More than twelve months	0	0
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value [Abstract]	'	'
Fair Value - Less than twelve months	3,260	7,809
Fair Value - More than twelve months	'	0
Total other mortgage- and asset-backed securities	'	'
Available-for-sale Securities, Continuous Unrealized Loss Position, Aggregate Loss [Abstract]	'	'
Gross Unrealized Losses - Less than twelve months	-27	-532
Gross Unrealized Losses - More than twelve months	-262	-151
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value [Abstract]	'	'
Fair Value - Less than twelve months	10,104	27,234
Fair Value - More than twelve months	13,149	4,153
State and political	'	'
Available-for-sale Securities, Continuous Unrealized Loss Position, Aggregate Loss [Abstract]	'	'
Gross Unrealized Losses - Less than twelve months	-3	-107
Gross Unrealized Losses - More than twelve months	-11	'
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value [Abstract]	'	'
Fair Value - Less than twelve months	989	5,904
Fair Value - More than twelve months	687	0
Total marketable equity securities	'	'
Available-for-sale Securities, Continuous Unrealized Loss Position, Aggregate Loss [Abstract]	'	'
Gross Unrealized Losses - Less than twelve months	0	-139
Gross Unrealized Losses - More than twelve months	-5	-17
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value [Abstract]	'	'
Fair Value - Less than twelve months	0	24,217
Fair Value - More than twelve months	461	524
Domestic community	'	'
Available-for-sale Securities, Continuous Unrealized Loss Position, Aggregate Loss [Abstract]	'	'
Gross Unrealized Losses - Less than twelve months	0	-30
Gross Unrealized Losses - More than twelve months	-5	-13
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value [Abstract]	'	'
Fair Value - Less than twelve months	0	2,767
Fair Value - More than twelve months	461	453
Diversified bonds	'	'
Available-for-sale Securities, Continuous Unrealized Loss Position, Aggregate Loss [Abstract]	'	'
Gross Unrealized Losses - Less than twelve months	'	-109
Gross Unrealized Losses - More than twelve months	'	-4
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value [Abstract]	'	'
Fair Value - Less than twelve months	'	21,450
Fair Value - More than twelve months	'	71
Financial Services \| Corporate debt securities	'	'
Available-for-sale Securities, Continuous Unrealized Loss Position, Aggregate Loss [Abstract]	'	'
Gross Unrealized Losses - Less than twelve months	-5	-218
Gross Unrealized Losses - More than twelve months	-17	0
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value [Abstract]	'	'
Fair Value - Less than twelve months	1,093	8,619
Fair Value - More than twelve months	680	0
Banks \| Corporate debt securities	'	'
Available-for-sale Securities, Continuous Unrealized Loss Position, Aggregate Loss [Abstract]	'	'
Gross Unrealized Losses - Less than twelve months	0	-74
Gross Unrealized Losses - More than twelve months	-17	0
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value [Abstract]	'	'
Fair Value - Less than twelve months	0	1,773
Fair Value - More than twelve months	680	0
Diversified Financials \| Corporate debt securities	'	'
Available-for-sale Securities, Continuous Unrealized Loss Position, Aggregate Loss [Abstract]	'	'
Gross Unrealized Losses - Less than twelve months	-5	-52
Gross Unrealized Losses - More than twelve months	0	0
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value [Abstract]	'	'
Fair Value - Less than twelve months	1,093	1,380
Fair Value - More than twelve months	0	0
Insurance and REITs \| Corporate debt securities	'	'
Available-for-sale Securities, Continuous Unrealized Loss Position, Aggregate Loss [Abstract]	'	'
Gross Unrealized Losses - Less than twelve months	'	-92
Gross Unrealized Losses - More than twelve months	'	0
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value [Abstract]	'	'
Fair Value - Less than twelve months	'	5,466
Fair Value - More than twelve months	'	0
Other Corporate \| Corporate debt securities	'	'
Available-for-sale Securities, Continuous Unrealized Loss Position, Aggregate Loss [Abstract]	'	'
Gross Unrealized Losses - Less than twelve months	'	-512
Gross Unrealized Losses - More than twelve months	'	0
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value [Abstract]	'	'
Fair Value - Less than twelve months	'	23,618
Fair Value - More than twelve months	'	0
Industrials \| Corporate debt securities	'	'
Available-for-sale Securities, Continuous Unrealized Loss Position, Aggregate Loss [Abstract]	'	'
Gross Unrealized Losses - Less than twelve months	-25	-312
Gross Unrealized Losses - More than twelve months	-13	0
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value [Abstract]	'	'
Fair Value - Less than twelve months	6,127	10,947
Fair Value - More than twelve months	2,718	0
Utilities \| Corporate debt securities	'	'
Available-for-sale Securities, Continuous Unrealized Loss Position, Aggregate Loss [Abstract]	'	'
Gross Unrealized Losses - Less than twelve months	'	-200
Gross Unrealized Losses - More than twelve months	'	0
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value [Abstract]	'	'
Fair Value - Less than twelve months	'	12,671
Fair Value - More than twelve months	'	$0

Securities_Available_for_Sale_4

Securities Available for Sale - Narrative (Details) (USD $)	Jun. 30, 2014	Dec. 31, 2013
In Thousands, unless otherwise specified	Jun. 30, 2014	Dec. 31, 2013
Schedule of Available-for-sale Securities [Line Items]	'	'
Depreciation, percentage of amortized cost basis	0.55%	'
Gross Unrealized Losses - More than twelve months	$1,947	$267
Domestic community	'	'
Schedule of Available-for-sale Securities [Line Items]	'	'
Depreciation, percentage of amortized cost basis	1.00%	'
Unrealized loss position, number of positions, more than twelve months	1	'
Gross Unrealized Losses - More than twelve months	$5	$13

Loans_and_The_Allowance_for_Lo2

Loans and The Allowance for Loan Loss - Summary of Loan balances (Details) (USD $)	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2012
In Thousands, unless otherwise specified	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2012
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'	'	'	'	'
Total loans	$1,003,064	'	$772,240	'	'	'
Allowance for loan losses	-11,292	-10,346	-9,671	-7,622	-6,394	-5,550
Discount on purchased loans	-4,226	'	-340	'	'	'
Deferred loan costs and fees, net	2,807	'	2,343	'	'	'
Loans, net	990,353	'	764,572	'	'	'
Real Estate	'	'	'	'	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'	'	'	'	'
Total loans	853,033	'	635,714	'	'	'
1-4 Family Residential	'	'	'	'	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'	'	'	'	'
Total loans	407,142	'	364,932	'	'	'
Allowance for loan losses	-3,088	-2,887	-2,835	-2,430	-2,548	-2,725
Home Equity	'	'	'	'	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'	'	'	'	'
Total loans	62,900	'	25,535	'	'	'
Allowance for loan losses	-305	-268	-247	-329	-321	-316
Commercial Real Estate	'	'	'	'	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'	'	'	'	'
Total loans	337,643	'	228,688	'	'	'
Allowance for loan losses	-3,242	-2,928	-2,608	-1,932	-1,653	-1,343
Construction	'	'	'	'	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'	'	'	'	'
Total loans	45,348	'	16,559	'	'	'
Allowance for loan losses	-699	-414	-303	-193	-115	-106
Commercial Business	'	'	'	'	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'	'	'	'	'
Total loans	120,481	'	111,154	'	'	'
Allowance for loan losses	-2,655	-2,589	-2,416	-1,501	-476	-565
Consumer	'	'	'	'	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'	'	'	'	'
Total loans	29,550	'	25,372	'	'	'
Allowance for loan losses	($645)	($602)	($574)	($401)	($362)	($313)

Loans_and_The_Allowance_for_Lo3

Loans and The Allowance for Loan Loss - Activity in Allowance for Loan Losses (Details) (USD $)	3 Months Ended		6 Months Ended
In Thousands, unless otherwise specified	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013
Financing Receivable, Allowance for Credit Losses [Roll Forward]	'	'	'	'
Loans and Leases Receivable, Allowance	$10,346	$6,394	$9,671	$5,550
Provision for loan losses	959	1,092	1,673	1,956
Loans charged-off	-13	-20	-52	-120
Recoveries	0	156	0	236
Loans and Leases Receivable, Allowance	11,292	7,622	11,292	7,622
1-4 Family Residential	'	'	'	'
Financing Receivable, Allowance for Credit Losses [Roll Forward]	'	'	'	'
Loans and Leases Receivable, Allowance	2,887	2,548	2,835	2,725
Provision for loan losses	201	-269	271	-433
Loans charged-off	0	-5	-18	-98
Recoveries	0	156	0	236
Loans and Leases Receivable, Allowance	3,088	2,430	3,088	2,430
Home Equity	'	'	'	'
Financing Receivable, Allowance for Credit Losses [Roll Forward]	'	'	'	'
Loans and Leases Receivable, Allowance	268	321	247	316
Provision for loan losses	37	8	58	13
Loans charged-off	0	0	0	0
Recoveries	0	0	0	0
Loans and Leases Receivable, Allowance	305	329	305	329
Commercial Real Estate	'	'	'	'
Financing Receivable, Allowance for Credit Losses [Roll Forward]	'	'	'	'
Loans and Leases Receivable, Allowance	2,928	1,653	2,608	1,343
Provision for loan losses	314	279	634	589
Loans charged-off	0	0	0	0
Recoveries	0	0	0	0
Loans and Leases Receivable, Allowance	3,242	1,932	3,242	1,932
Construction	'	'	'	'
Financing Receivable, Allowance for Credit Losses [Roll Forward]	'	'	'	'
Loans and Leases Receivable, Allowance	414	115	303	106
Provision for loan losses	285	78	396	87
Loans charged-off	0	0	0	0
Recoveries	0	0	0	0
Loans and Leases Receivable, Allowance	699	193	699	193
Commercial Business	'	'	'	'
Financing Receivable, Allowance for Credit Losses [Roll Forward]	'	'	'	'
Loans and Leases Receivable, Allowance	2,589	476	2,416	565
Provision for loan losses	66	1,025	239	936
Loans charged-off	0	0	0	0
Recoveries	0	0	0	0
Loans and Leases Receivable, Allowance	2,655	1,501	2,655	1,501
Consumer	'	'	'	'
Financing Receivable, Allowance for Credit Losses [Roll Forward]	'	'	'	'
Loans and Leases Receivable, Allowance	602	362	574	313
Provision for loan losses	56	54	105	110
Loans charged-off	-13	-15	-34	-22
Recoveries	0	0	0	0
Loans and Leases Receivable, Allowance	645	401	645	401
Unallocated	'	'	'	'
Financing Receivable, Allowance for Credit Losses [Roll Forward]	'	'	'	'
Loans and Leases Receivable, Allowance	658	919	688	182
Provision for loan losses	0	-83	-30	654
Loans charged-off	0	0	0	0
Recoveries	0	0	0	0
Loans and Leases Receivable, Allowance	$658	$836	$658	$836

Loans_and_The_Allowance_for_Lo4

Loans and The Allowance for Loan Loss - Additional Activity in Allowance for Loan Losses (Details) (USD $)	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2012
In Thousands, unless otherwise specified	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2012
Financing Receivable, Allowance for Credit Losses [Line Items]	'	'	'	'	'	'
Allowance related to impaired loans	$0	'	$0	'	'	'
Allowance related to non-impaired loans	11,292	'	9,671	'	'	'
Total allowance for loan losses	11,292	10,346	9,671	7,622	6,394	5,550
Impaired loans	5,057	'	3,154	'	'	'
Non-impaired loans	998,007	'	769,086	'	'	'
Total loans	1,003,064	'	772,240	'	'	'
1-4 Family Residential	'	'	'	'	'	'
Financing Receivable, Allowance for Credit Losses [Line Items]	'	'	'	'	'	'
Allowance related to impaired loans	0	'	0	'	'	'
Allowance related to non-impaired loans	3,088	'	2,835	'	'	'
Total allowance for loan losses	3,088	2,887	2,835	2,430	2,548	2,725
Impaired loans	4,202	'	3,118	'	'	'
Non-impaired loans	402,940	'	361,814	'	'	'
Total loans	407,142	'	364,932	'	'	'
Home Equity	'	'	'	'	'	'
Financing Receivable, Allowance for Credit Losses [Line Items]	'	'	'	'	'	'
Allowance related to impaired loans	0	'	0	'	'	'
Allowance related to non-impaired loans	305	'	247	'	'	'
Total allowance for loan losses	305	268	247	329	321	316
Impaired loans	807	'	36	'	'	'
Non-impaired loans	62,093	'	25,499	'	'	'
Total loans	62,900	'	25,535	'	'	'
Commercial Real Estate	'	'	'	'	'	'
Financing Receivable, Allowance for Credit Losses [Line Items]	'	'	'	'	'	'
Allowance related to impaired loans	0	'	0	'	'	'
Allowance related to non-impaired loans	3,242	'	2,608	'	'	'
Total allowance for loan losses	3,242	2,928	2,608	1,932	1,653	1,343
Impaired loans	0	'	0	'	'	'
Non-impaired loans	337,643	'	228,688	'	'	'
Total loans	337,643	'	228,688	'	'	'
Construction	'	'	'	'	'	'
Financing Receivable, Allowance for Credit Losses [Line Items]	'	'	'	'	'	'
Allowance related to impaired loans	0	'	0	'	'	'
Allowance related to non-impaired loans	699	'	303	'	'	'
Total allowance for loan losses	699	414	303	193	115	106
Impaired loans	0	'	0	'	'	'
Non-impaired loans	45,348	'	16,559	'	'	'
Total loans	45,348	'	16,559	'	'	'
Commercial Business	'	'	'	'	'	'
Financing Receivable, Allowance for Credit Losses [Line Items]	'	'	'	'	'	'
Allowance related to impaired loans	0	'	0	'	'	'
Allowance related to non-impaired loans	2,655	'	2,416	'	'	'
Total allowance for loan losses	2,655	2,589	2,416	1,501	476	565
Impaired loans	0	'	0	'	'	'
Non-impaired loans	120,481	'	111,154	'	'	'
Total loans	120,481	'	111,154	'	'	'
Consumer	'	'	'	'	'	'
Financing Receivable, Allowance for Credit Losses [Line Items]	'	'	'	'	'	'
Allowance related to impaired loans	0	'	0	'	'	'
Allowance related to non-impaired loans	645	'	574	'	'	'
Total allowance for loan losses	645	602	574	401	362	313
Impaired loans	48	'	0	'	'	'
Non-impaired loans	29,502	'	25,372	'	'	'
Total loans	29,550	'	25,372	'	'	'
Unallocated	'	'	'	'	'	'
Financing Receivable, Allowance for Credit Losses [Line Items]	'	'	'	'	'	'
Allowance related to impaired loans	0	'	0	'	'	'
Allowance related to non-impaired loans	658	'	688	'	'	'
Total allowance for loan losses	658	658	688	836	919	182
Impaired loans	0	'	0	'	'	'
Non-impaired loans	0	'	0	'	'	'
Total loans	$0	'	$0	'	'	'

Loans_and_The_Allowance_for_Lo5

Loans and The Allowance for Loan Loss - Summary of Past Due and Non-accrual loans, by class (Details) (USD $)	Jun. 30, 2014	Dec. 31, 2013
In Thousands, unless otherwise specified	Jun. 30, 2014	Dec. 31, 2013
Financing Receivable, Recorded Investment, Past Due [Line Items]	'	'
30-59 Days Past Due	$2,574	$1,426
60-89 Days Past Due	18	196
Past Due 90 Days or More	1,694	864
Total Past Due	4,286	2,486
Loans on Non-accrual	4,502	1,742
1-4 Family Residential	'	'
Financing Receivable, Recorded Investment, Past Due [Line Items]	'	'
30-59 Days Past Due	2,359	1,426
60-89 Days Past Due	0	196
Past Due 90 Days or More	1,131	828
Total Past Due	3,490	2,450
Loans on Non-accrual	3,647	1,706
Home Equity	'	'
Financing Receivable, Recorded Investment, Past Due [Line Items]	'	'
30-59 Days Past Due	205	0
60-89 Days Past Due	0	0
Past Due 90 Days or More	563	36
Total Past Due	768	36
Loans on Non-accrual	807	36
Consumer	'	'
Financing Receivable, Recorded Investment, Past Due [Line Items]	'	'
30-59 Days Past Due	10	'
60-89 Days Past Due	18	'
Past Due 90 Days or More	0	'
Total Past Due	28	'
Loans on Non-accrual	$48	'

Loans_and_The_Allowance_for_Lo6

Loans and The Allowance for Loan Loss - Summary of Impaired Loans (Details) (USD $)	Jun. 30, 2014	Dec. 31, 2013
In Thousands, unless otherwise specified	Jun. 30, 2014	Dec. 31, 2013
Financing Receivable, Impaired [Line Items]	'	'
Recorded Investment	$5,057	$3,154
Unpaid Principal Balance	6,108	3,929
Allowance related to impaired loans	0	0
1-4 Family Residential	'	'
Financing Receivable, Impaired [Line Items]	'	'
Recorded Investment	4,202	3,118
Unpaid Principal Balance	4,994	3,893
Allowance related to impaired loans	0	0
Home Equity	'	'
Financing Receivable, Impaired [Line Items]	'	'
Recorded Investment	807	'
Unpaid Principal Balance	1,066	'
Allowance related to impaired loans	0	'
Consumer	'	'
Financing Receivable, Impaired [Line Items]	'	'
Recorded Investment	48	36
Unpaid Principal Balance	48	36
Allowance related to impaired loans	$0	$0

Loans_and_The_Allowance_for_Lo7

Loans and The Allowance for Loan Loss - Summary of Average Recorded Investments and Interest Income of Impaired Loans (Details) (USD $)	3 Months Ended		6 Months Ended
In Thousands, unless otherwise specified	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013
Financing Receivable, Impaired [Line Items]	'	'	'	'
Average Recorded Investment	$4,741	$2,387	$3,899	$2,183
Interest Income Recognized	49	39	91	66
1-4 Family Residential	'	'	'	'
Financing Receivable, Impaired [Line Items]	'	'	'	'
Average Recorded Investment	3,753	2,369	3,241	2,171
Interest Income Recognized	49	39	83	65
Home Equity	'	'	'	'
Financing Receivable, Impaired [Line Items]	'	'	'	'
Average Recorded Investment	683	18	455	'
Interest Income Recognized	0	'	4	'
Commercial Business	'	'	'	'
Financing Receivable, Impaired [Line Items]	'	'	'	'
Average Recorded Investment	276	'	184	'
Interest Income Recognized	0	'	4	'
Consumer	'	'	'	'
Financing Receivable, Impaired [Line Items]	'	'	'	'
Average Recorded Investment	29	'	19	12
Interest Income Recognized	$0	$0	$0	$1

Loans_and_The_Allowance_for_Lo8

Loans and The Allowance for Loan Loss - Summary of Loan by Risk Rating (Details) (USD $)	Jun. 30, 2014	Dec. 31, 2013
In Thousands, unless otherwise specified	Jun. 30, 2014	Dec. 31, 2013
Financing Receivable, Recorded Investment [Line Items]	'	'
Total loans	$1,003,064	$772,240
1-4 Family Residential	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Total loans	407,142	364,932
Home Equity	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Total loans	62,900	25,535
Commercial Real Estate	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Total loans	337,643	228,688
Construction	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Total loans	45,348	16,559
Commercial Business	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Total loans	120,481	111,154
Consumer	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Total loans	29,550	25,372
Loans rated 1 - 6	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Total loans	495,878	354,843
Loans rated 1 - 6 \| 1-4 Family Residential	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Total loans	3,422	1,701
Loans rated 1 - 6 \| Home Equity	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Total loans	518	4,610
Loans rated 1 - 6 \| Commercial Real Estate	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Total loans	336,522	223,144
Loans rated 1 - 6 \| Construction	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Total loans	45,348	15,246
Loans rated 1 - 6 \| Commercial Business	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Total loans	109,945	110,142
Loans rated 1 - 6 \| Consumer	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Total loans	123	0
Loans rated 7	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Total loans	15,784	2,819
Loans rated 7 \| 1-4 Family Residential	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Total loans	2,935	468
Loans rated 7 \| Home Equity	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Total loans	1,190	0
Loans rated 7 \| Commercial Real Estate	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Total loans	1,121	2,339
Loans rated 7 \| Construction	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Total loans	0	0
Loans rated 7 \| Commercial Business	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Total loans	10,536	12
Loans rated 7 \| Consumer	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Total loans	2	0
Loans rated 8 - 9	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Total loans	1,398	1,707
Loans rated 8 - 9 \| 1-4 Family Residential	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Total loans	1,350	1,647
Loans rated 8 - 9 \| Home Equity	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Total loans	0	36
Loans rated 8 - 9 \| Commercial Real Estate	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Total loans	0	0
Loans rated 8 - 9 \| Construction	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Total loans	0	0
Loans rated 8 - 9 \| Commercial Business	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Total loans	0	0
Loans rated 8 - 9 \| Consumer	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Total loans	48	24
Loans rated 10	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Total loans	693	693
Loans rated 10 \| 1-4 Family Residential	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Total loans	693	693
Loans rated 10 \| Home Equity	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Total loans	0	0
Loans rated 10 \| Commercial Real Estate	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Total loans	0	0
Loans rated 10 \| Construction	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Total loans	0	0
Loans rated 10 \| Commercial Business	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Total loans	0	0
Loans rated 10 \| Consumer	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Total loans	0	0
Loans not rated	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Total loans	489,311	412,178
Loans not rated \| 1-4 Family Residential	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Total loans	398,742	360,423
Loans not rated \| Home Equity	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Total loans	61,192	20,889
Loans not rated \| Commercial Real Estate	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Total loans	0	3,205
Loans not rated \| Construction	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Total loans	0	1,313
Loans not rated \| Commercial Business	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Total loans	0	1,000
Loans not rated \| Consumer	'	'
Financing Receivable, Recorded Investment [Line Items]	'	'
Total loans	$29,377	$25,348

Interest_Rate_Swap_Agreements_1

Interest Rate Swap Agreements (Details) (Not Designated as Hedging Instrument, USD $)	Jun. 30, 2014	Dec. 31, 2013
In Thousands, unless otherwise specified	Jun. 30, 2014	Dec. 31, 2013
Derivatives, Fair Value [Line Items]	'	'
Derivative Asset, notional amount	$193,747	$180,679
Derivative Asset, fair value	4,133	2,487
Derivative Liability, notional amount	192,895	179,735
Derivative Liability, fair value	4,316	2,393
Interest Rate Swap	'	'
Derivatives, Fair Value [Line Items]	'	'
Derivative Asset, notional amount	184,973	171,747
Derivative Asset, fair value	4,126	2,482
Derivative Liability, notional amount	184,973	171,747
Derivative Liability, fair value	4,299	2,379
Other Contract	'	'
Derivatives, Fair Value [Line Items]	'	'
Derivative Asset, notional amount	8,774	8,932
Derivative Asset, fair value	7	5
Derivative Liability, notional amount	7,922	7,988
Derivative Liability, fair value	$17	$14

Deposits_Summary_of_Deposit_Ba

Deposits - Summary of Deposit Balances (Details) (USD $)	Jun. 30, 2014	Dec. 31, 2013
In Thousands, unless otherwise specified	Jun. 30, 2014	Dec. 31, 2013
Banking and Thrift [Abstract]	'	'
NOW and demand	$237,586	$118,648
Regular savings	343,697	332,518
Money market deposits	195,264	75,716
Total non-certificate accounts	776,547	526,882
Certificates of deposit	293,516	296,718
Brokered deposits	81,205	91,623
Total certificate accounts	374,721	388,341
Total deposits	$1,151,268	$915,223

Deposits_Schedule_of_Contractu

Deposits - Schedule of Contractual Maturities (Details) (USD $)	Jun. 30, 2014	Dec. 31, 2013
In Thousands, unless otherwise specified	Jun. 30, 2014	Dec. 31, 2013
Time Deposits, Fiscal Year Maturity [Abstract]	'	'
Amount - Within 1 year	$272,211	'
Amount - 1-2 years	47,301	'
Amount - 2-3 years	35,331	'
Amount - 3-4 years	10,647	'
Amount - 4 years and beyond	9,231	'
Total certificate accounts	$374,721	$388,341
Weighted Average Rate of Time Deposits [Abstract]	'	'
Weighted Average Rate - Within 1 year	0.62%	'
Weighted Average Rate - 1-2 years	1.41%	'
Weighted Average Rate - 2-3 years	1.31%	'
Weighted Average Rate - 3-4 years	1.18%	'
Weighted Average Rate - 4 years and beyond	1.14%	'
Weighted Average Rate	0.82%	'

Fair_Value_Measurements_Assets

Fair Value Measurements - Assets and Liabilities Measured at Fair Value on a Recurring Basis (Details) (USD $)	Jun. 30, 2014	Dec. 31, 2013
In Thousands, unless otherwise specified	Jun. 30, 2014	Dec. 31, 2013
Assets	'	'
Trading assets	$0	$750
Debt securities	369,520	361,071
Marketable equity securities	48,061	80,235
Level 1	'	'
Assets	'	'
Trading assets	'	0
Level 2	'	'
Assets	'	'
Trading assets	'	750
Level 3	'	'
Assets	'	'
Trading assets	'	0
Recurring	'	'
Assets	'	'
Trading assets	'	750
Debt securities	369,520	361,071
Marketable equity securities	48,061	80,235
Derivative assets	4,133	2,487
Total assets	421,714	444,543
Liabilities	'	'
Derivative liabilities	4,316	2,393
Total liabilities	'	2,393
Recurring \| Level 1	'	'
Assets	'	'
Trading assets	'	0
Debt securities	89,579	128,202
Marketable equity securities	48,061	80,235
Derivative assets	0	0
Total assets	137,640	208,437
Liabilities	'	'
Derivative liabilities	0	0
Total liabilities	'	0
Recurring \| Level 2	'	'
Assets	'	'
Trading assets	'	750
Debt securities	279,941	232,869
Marketable equity securities	0	0
Derivative assets	4,133	2,487
Total assets	284,074	236,106
Liabilities	'	'
Derivative liabilities	4,316	2,393
Total liabilities	'	2,393
Recurring \| Level 3	'	'
Assets	'	'
Trading assets	'	0
Debt securities	0	0
Marketable equity securities	0	0
Derivative assets	0	0
Total assets	0	0
Liabilities	'	'
Derivative liabilities	0	0
Total liabilities	'	$0

Fair_Value_Measurements_Assets1

Fair Value Measurements - Assets and Liabilities Measured at Fair Value on a Nonrecurring Basis (Details) (USD $)	3 Months Ended	6 Months Ended
In Thousands, unless otherwise specified	Jun. 30, 2014	Jun. 30, 2014
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'
Total Losses	$0	$18
Nonrecurring \| Level 1	'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'
Impaired loans	0	0
Nonrecurring \| Level 2	'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'
Impaired loans	0	0
Nonrecurring \| Level 3	'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'
Impaired loans	$1,197	$1,197

Fair_Value_Measurements_Summar

Fair Value Measurements - Summary of Fair Value, Balance Sheet Grouping (Details) (USD $)	Jun. 30, 2014	Dec. 31, 2013
In Thousands, unless otherwise specified	Jun. 30, 2014	Dec. 31, 2013
Financial assets:	'	'
Trading assets	$0	$750
Securities available for sale	417,581	441,306
Carrying Amount	'	'
Financial assets:	'	'
Cash and cash equivalents	296,926	40,316
Trading assets	'	750
Securities available for sale	417,581	441,306
Federal Home Loan Bank stock	11,702	10,766
Loans and loans held for sale	1,012,751	765,347
Accrued interest receivable	4,127	4,290
Financial liabilities:	'	'
Deposits	1,151,268	915,223
Borrowings	195,000	215,000
Estimate of Fair Value Measurement	'	'
Financial assets:	'	'
Cash and cash equivalents	296,926	40,316
Trading assets	'	750
Securities available for sale	417,581	441,306
Federal Home Loan Bank stock	11,702	10,766
Loans and loans held for sale	1,019,064	768,803
Accrued interest receivable	4,127	4,290
Financial liabilities:	'	'
Deposits	1,152,806	917,121
Borrowings	196,298	216,332
Level 1	'	'
Financial assets:	'	'
Cash and cash equivalents	296,926	40,316
Trading assets	'	0
Securities available for sale	137,640	208,437
Federal Home Loan Bank stock	0	0
Loans and loans held for sale	0	0
Accrued interest receivable	0	0
Financial liabilities:	'	'
Deposits	0	0
Borrowings	0	0
Level 2	'	'
Financial assets:	'	'
Cash and cash equivalents	0	0
Trading assets	'	750
Securities available for sale	279,941	232,869
Federal Home Loan Bank stock	0	0
Loans and loans held for sale	0	0
Accrued interest receivable	0	0
Financial liabilities:	'	'
Deposits	0	0
Borrowings	196,298	216,332
Level 3	'	'
Financial assets:	'	'
Cash and cash equivalents	0	0
Trading assets	'	0
Securities available for sale	0	0
Federal Home Loan Bank stock	11,702	10,766
Loans and loans held for sale	1,019,064	768,803
Accrued interest receivable	4,127	4,290
Financial liabilities:	'	'
Deposits	1,152,806	917,121
Borrowings	0	0
Interest Rate Swap \| Carrying Amount	'	'
Financial liabilities:	'	'
Derivative assets	4,133	2,487
Derivative liabilities	4,316	2,393
Interest Rate Swap \| Estimate of Fair Value Measurement	'	'
Financial liabilities:	'	'
Derivative assets	4,133	2,487
Derivative liabilities	4,316	2,393
Interest Rate Swap \| Level 1	'	'
Financial liabilities:	'	'
Derivative assets	0	0
Derivative liabilities	0	0
Interest Rate Swap \| Level 2	'	'
Financial liabilities:	'	'
Derivative assets	4,133	2,487
Derivative liabilities	4,316	2,393
Interest Rate Swap \| Level 3	'	'
Financial liabilities:	'	'
Derivative assets	0	0
Derivative liabilities	$0	$0

Comprehensive_Income_Details

Comprehensive Income (Details) (USD $)	Jun. 30, 2014	Dec. 31, 2013
In Thousands, unless otherwise specified	Jun. 30, 2014	Dec. 31, 2013
Accumulated Other Comprehensive Income (Loss) [Line Items]	'	'
Accumulated other comprehensive income	$7,472	$2,465
Accumulated Net Unrealized Investment Gain (Loss)	'	'
Accumulated Other Comprehensive Income (Loss) [Line Items]	'	'
Accumulated Other Comprehensive Income (Loss), before Tax	10,862	2,838
Tax effect	-3,872	-855
Accumulated other comprehensive income	6,990	1,983
Accumulated Defined Benefit Plans Adjustment, Net Unamortized Gain (Loss)	'	'
Accumulated Other Comprehensive Income (Loss) [Line Items]	'	'
Accumulated Other Comprehensive Income (Loss), before Tax	803	803
Tax effect	-321	-321
Accumulated other comprehensive income	$482	$482

Regulatory_Capital_Details

Regulatory Capital (Details) (USD $)	Jun. 30, 2014	Dec. 31, 2013
In Thousands, unless otherwise specified	Jun. 30, 2014	Dec. 31, 2013
Hyde Park Bancorp, MHC	'	'
Capital [Abstract]	'	'
Actual - Total Capital	$168,689	$178,090
Actual - Total Capital to Risk Weighted Assets Ratio (percentage)	15.10%	19.80%
Minimum Capital Requirement - Total Capital	89,641	71,870
Minimum Capital Requirement - Total Capital to Risk Weighted Assets (percentage)	8.00%	8.00%
Tier One Risk Based Capital [Abstract]	'	'
Actual - Tier 1 Capital to Risk Weighted Assets	154,297	166,316
Actual - Tier 1 Capital to Risk Weighted Assets Ratio (percentage)	13.80%	18.50%
Minimum Capital Requirement - Tier 1 Capital to Risk Weighted Assets	44,820	35,935
Minimum Capital Requirement - Tier 1 Capital to Risk Weighted Assets Ratio (percentage)	4.00%	4.00%
Tier One Leverage Capital [Abstract]	'	'
Actual - Tier 1 Capital to Average Assets	154,297	166,316
Actual - Tier 1 Capital to Average Assets Ratio (percentage)	9.00%	13.20%
Minimum Capital Requirement - Tier 1 Capital to Average Assets	68,503	50,541
Minimum Capital Requirement - Tier 1 Capital to Average Assets Ratio (percentage)	4.00%	4.00%
Blue Hills Bank	'	'
Capital [Abstract]	'	'
Actual - Total Capital	140,256	148,872
Actual - Total Capital to Risk Weighted Assets Ratio (percentage)	12.80%	16.60%
Minimum Capital Requirement - Total Capital	87,820	71,864
Minimum Capital Requirement - Total Capital to Risk Weighted Assets (percentage)	8.00%	8.00%
Minimum to Be Well Capitalized - Total Capital	109,775	89,831
Minimum to Be Well Capitalized - Total Capital to Risk Weighted Assets Ratio (percentage)	10.00%	10.00%
Tier One Risk Based Capital [Abstract]	'	'
Actual - Tier 1 Capital to Risk Weighted Assets	125,864	137,099
Actual - Tier 1 Capital to Risk Weighted Assets Ratio (percentage)	11.50%	15.30%
Minimum Capital Requirement - Tier 1 Capital to Risk Weighted Assets	43,910	35,932
Minimum Capital Requirement - Tier 1 Capital to Risk Weighted Assets Ratio (percentage)	4.00%	4.00%
Minimum to Be Well Capitalized - Tier 1 Capital to Risk Weighted Assets	65,865	53,898
Minimum to Be Well Capitalized - Tier 1 Capital to Risk Weighted Assets Ratio (percentage)	6.00%	6.00%
Tier One Leverage Capital [Abstract]	'	'
Actual - Tier 1 Capital to Average Assets	125,864	137,099
Actual - Tier 1 Capital to Average Assets Ratio (percentage)	7.40%	11.10%
Minimum Capital Requirement - Tier 1 Capital to Average Assets	68,508	49,370
Minimum Capital Requirement - Tier 1 Capital to Average Assets Ratio (percentage)	4.00%	4.00%
Minimum to Be Well Capitalized - Tier 1 Capital to Average Assets	$85,629	$61,712
Minimum to Be Well Capitalized - Tier 1 Capital to Average Assets Ratio (percentage)	5.00%	5.00%

Subsequent_Events_Details

Subsequent Events (Details) (Subsequent Event, USD $)	0 Months Ended
Subsequent Events (Details) (Subsequent Event, USD $)	Jul. 11, 2014	Jul. 11, 2014
Subsequent Event	'	'
Subsequent Event [Line Items]	'	'
Preferred stock, redemption amount	'	$18,724,000
Payment for repurchase of redeemable preferred stock	$18,724,000	'