Blue Hills Bancorp (BHBK) 10-Q 13 Nov 15 2015 Q3 Quarterly report Financial data

Document and Entity Information

Document and Entity Information Document - shares	9 Months Ended
	Sep. 30, 2015	Nov. 06, 2015
Document and Entity Information [Abstract]
Entity Registrant Name	Blue Hills Bancorp, Inc.
Entity Central Index Key	1,601,545
Current Fiscal Year End Date	--12-31
Entity Filer Category	Non-accelerated Filer
Document Type	10-Q
Document Period End Date	Sep. 30, 2015
Document Fiscal Year Focus	2,015
Document Fiscal Period Focus	Q3
Amendment Flag	false
Entity Common Stock, Shares Outstanding		27,585,013

Consolidated Balance Sheets (un

Consolidated Balance Sheets (unaudited) - USD ($) $ in Thousands	Sep. 30, 2015	Dec. 31, 2014
Assets
Cash and due from banks	$ 9,447	$ 15,345
Short-term investments	11,533	44,801
Total cash and cash equivalents	20,980	60,146
Securities available for sale, at fair value	231,697	416,447
Securities held to maturity, at amortized cost	197,632	0
Federal Home Loan Bank stock, at cost	11,702	11,702
Loans held for sale	21,423	14,591
Loans, net of allowance for loan losses of $15,082 at September 30, 2015 and $12,973 at December 31, 2014	1,352,120	1,132,914
Premises and equipment, net	19,485	18,788
Accrued interest receivable	5,174	4,433
Goodwill	9,160	9,160
Core deposit intangible	2,991	4,232
Net deferred tax asset	8,368	6,233
Bank-owned life insurance	31,358	30,595
Other assets	22,348	18,907
Total assets	1,934,438	1,728,148
Deposits:
Non-interest bearing	146,479	123,392
Interest bearing	1,198,479	1,089,324
Total deposits	1,344,958	1,212,716
Short-term borrowings	115,000	40,000
Long-term debt	45,000	35,000
Accrued expenses and other liabilities	21,868	28,826
Total liabilities	1,526,826	1,316,542
Stockholders' Equity:
Preferred stock, zero par value, (50,000,000 shares authorized; none issued and outstanding)	0	0
Common Stock, $0.01 par value, (100,000,000 shares authorized; 28,150,313 and 28,466,813 issued and outstanding at September 30, 2015 and December 31, 2015, respectively)	282	285
Additional paid-in capital	276,730	281,035
Unearned compensation-ESOP	(21,445)	(22,014)
Retained earnings	153,969	149,723
Accumulated other comprehensive income (loss)	(1,924)	2,577
Total stockholders' equity	407,612	411,606
Total liabilities and stockholders' equity	$ 1,934,438	$ 1,728,148

Consolidated Balance Sheets (u3

Consolidated Balance Sheets (unaudited) (Parenthetical) - USD ($) $ in Thousands	Sep. 30, 2015	Dec. 31, 2014
Statement of Financial Position [Abstract]
Allowance for Loan Losses	$ 15,082	$ 12,973
Preferred stock, par value (dollars per share)	$ 0	$ 0
Preferred stock, shares authorized	50,000,000	50,000,000
Preferred stock, shares issued	0	0
Preferred stock, shares outstanding	0	0
Common stock, par value (dollars per share)	$ 0.01	$ 0.01
Common stock, shares authorized	100,000,000	100,000,000
Common stock, shares issued	28,150,313	28,466,813
Common stock, shares outstanding	28,150,313	28,466,813

Consolidated Statements of Net

Consolidated Statements of Net Income (unaudited) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Interest and dividend income:
Interest and fees on loans	$ 11,509	$ 9,725	$ 32,695	$ 27,175
Interest on securities	2,227	1,892	6,600	5,832
Dividends	1,673	1,388	1,885	1,673
Other	9	65	50	110
Total interest and dividend income	15,418	13,070	41,230	34,790
Interest expense:
Interest on deposits	1,926	1,376	5,434	4,075
Interest on borrowings	287	275	811	905
Total interest expense	2,213	1,651	6,245	4,980
Net interest and dividend income	13,205	11,419	34,985	29,810
Provision for loan losses	1,318	1,438	2,141	3,111
Net interest income, after provision for loan losses	11,887	9,981	32,844	26,699
Non-interest income:
Deposit account fees	319	337	987	971
Interchange and ATM fees	430	390	1,133	1,046
Mortgage banking	52	341	236	484
Loan level derivative income	513	296	1,287	503
Gains on sales and calls of securities, net	238	349	1,823	2,081
Bank-owned life insurance income	258	250	763	745
Pension curtailment gain	0	1,304	0	1,304
Miscellaneous	(116)	107	126	179
Total non-interest income	1,694	3,374	6,355	7,313
Non-interest expense:
Salaries and employee benefits	5,591	5,424	16,721	15,765
Occupancy and equipment	1,617	1,150	4,579	4,049
Data processing	939	805	2,601	2,111
Professional fees	610	694	1,909	2,976
Advertising	620	815	1,682	1,774
FDIC deposit insurance	262	360	807	734
Directors’ fees	112	150	329	456
Amortization of core deposit intangible	390	485	1,241	1,347
Charitable foundation contribution	0	7,000	0	7,000
Other general and administrative	707	865	2,265	2,454
Total non-interest expense	10,848	17,748	32,134	38,666
Income (loss) before income taxes	2,733	(4,393)	7,065	(4,654)
Provision (benefit) for income taxes	923	(1,435)	2,250	(1,726)
Net income (loss)	$ 1,810	$ (2,958)	$ 4,815	$ (2,928)
Earnings per common share:
Basic (dollars per share)	$ 0.07		$ 0.18
Diluted (dollars per share)	$ 0.07		$ 0.18
Weighted average shares outstanding:
Basic (shares)	26,183,381		26,250,065
Diluted (shares)	26,183,381		26,250,065

Consolidated Statements of Comp

Consolidated Statements of Comprehensive Income (Loss) (unaudited) - USD ($) $ in Thousands		3 Months Ended		9 Months Ended
		Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Statement of Comprehensive Income [Abstract]
Net income (loss)		$ 1,810	$ (2,958)	$ 4,815	$ (2,928)
Securities available for sale:
Net unrealized holding gains (losses)		(4,508)	(3,911)	(5,139)	5,846
Reclassification adjustment for net gains realized in net income	[1]	(234)	(349)	(1,819)	(2,081)
Reclassification of unrealized gains on securities transferred to held-to-maturity		(666)	0	(666)	0
Net change in unrealized gains and losses		(5,408)	(4,260)	(7,624)	3,765
Tax effect		1,887	1,539	2,691	(1,479)
Net-of-tax amount		(3,521)	(2,721)	(4,933)	2,286
Securities held to maturity:
Reclassification of unrealized gains on securities transferred from available-for-sale		666	0	666	0
Amortization of amounts previously recorded upon transferred from available-for-sale	[2]	(35)	0	(35)	0
Net change in unrealized gains		631	0	631	0
Tax effect		(252)	0	(252)	0
Net-of-tax amount		379	0	379	0
Defined benefit pension plan:
Reclassification adjustment for net actuarial loss (gain) recognized in net periodic benefit cost	[3]	27	(70)	83	(70)
Actuarial losses arising during the period		0	(732)	0	(732)
Net change in actuarial losses		27	(802)	83	(802)
Tax effect		(8)	320	(30)	320
Net-of-tax amount		19	(482)	53	(482)
Other comprehensive income (loss)		(3,123)	(3,203)	(4,501)	1,804
Comprehensive income (loss)		$ (1,313)	$ (6,161)	$ 314	$ (1,124)
[1]	Amounts are included in gains on sales of securities available for sale, net, in non-interest income in the consolidated statements of operations. Income tax expense associated with the reclassification adjustments for the three months ended September 30, 2015 and 2014 was $76,000 and $125,000, respectively. Income tax expense associated with the reclassification adjustment for the nine months ended September 30, 2015 and 2014 was $640,000 and $764,000, respectively.
[2]	Amounts are included in interest income on securities in the consolidated statements of operations. Income tax expense associated with the amortization amounts for the three and nine months ended September 30, 2015 was $14,000.
[3]	Amounts are included in salaries and benefits expense in the consolidated statements of operations. Income tax benefit (expense) associated with the reclassification adjustments for the three months ended September 30, 2015 and 2014 was $8,000 and $(24,000), respectively. Income tax benefit and (expense) associated with the reclassification adjustments for the nine months ended September 30, 2015 and 2014 was $30,000 and $(24,000), respectively.

Consolidated Statements of Com6

Consolidated Statements of Comprehensive Income (Loss) (unaudited) (Parenthetical) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Statement of Comprehensive Income [Abstract]
Reclassification adjustment for net gains realized in net income, tax	$ 76	$ 125	$ 640	$ 764
Amortization of amounts previously recorded upon reclassification to held-to-maturity from available-for-sale, tax	14		14
Reclassification adjustment from AOCI, pension and other postretirement benefit plans, for net gain (loss), tax	$ 8	$ (24)	$ 30	$ (24)

Consolidated Statements of Chan

Consolidated Statements of Changes in Stockholders' Equity (unaudited) - USD ($) $ in Thousands	Total	SBLF Preferred Stock	Common Stock	Additional Paid-in Capital	Unearned Compensation- ESOP	Retained Earnings	Accumulated Other Comprehensive Income	IPO	IPOCommon Stock	IPOAdditional Paid-in Capital	Private Placement	Private PlacementCommon Stock	Private PlacementAdditional Paid-in Capital
Beginning balance at Dec. 31, 2013	$ 171,534	$ 18,724	$ 0	$ 0	$ 0	$ 150,345	$ 2,465
Beginning balance (shares) at Dec. 31, 2013			0
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Comprehensive income (loss)	(1,124)					(2,928)	1,804
Issuance of common stock (Net of IPO expenses of $3,565) (shares)									27,772,500			694,313
Issuance of common stock (Net of IPO expenses of $3,565)								$ 274,160	$ 278	$ 273,882	$ 6,943	$ 7	$ 6,936
Stock purchased by the ESOP	(22,773)				(22,773)
ESOP shares committed to be released	488			108	380
Redemption of SBLF preferred stock	(18,724)	(18,724)
Preferred stock dividends declared	(438)					(438)
Ending balance at Sep. 30, 2014	410,066	0	$ 285	280,926	(22,393)	146,979	4,269
Ending balance (shares) at Sep. 30, 2014			28,466,813
Beginning balance at Dec. 31, 2014	411,606	0	$ 285	281,035	(22,014)	149,723	2,577
Beginning balance (shares) at Dec. 31, 2014			28,466,813
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Comprehensive income (loss)	314					4,815	(4,501)
ESOP shares committed to be released	782			213	569
Common stock dividends paid ($0.02 per common share)	(569)					(569)
Repurchase of common stock (shares)			(316,500)
Repurchase of common stock	(4,521)		$ (3)	(4,518)
Ending balance at Sep. 30, 2015	$ 407,612	$ 0	$ 282	$ 276,730	$ (21,445)	$ 153,969	$ (1,924)
Ending balance (shares) at Sep. 30, 2015			28,150,313

Consolidated Statements of Cha8

Consolidated Statements of Changes in Stockholders' Equity (unaudited) (Parenthetical) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014
Common stock paid (dollars per share)	$ 0.02
IPO | Common Stock
Issuance of common stock for initial public offering, expenses		$ 3,565

Consolidated Statements of Cash

Consolidated Statements of Cash Flows (unaudited) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014
Cash flows from operating activities:
Net income (loss)	$ 4,815	$ (2,928)
Adjustments to reconcile net income to net cash provided by operating activities:
Provision for loan losses	2,141	3,111
Net amortization of securities	2,813	1,535
Gains on sales and calls of securities, net	(1,823)	(2,081)
Proceeds from sale of loans	24,307	8,751
Loans originated for sale	(23,500)	(8,859)
Gains on sale of residential loans, net	(236)	(484)
Net amortization of deferred loan origination costs and (discounts)	(130)	441
Depreciation and amortization of premises and equipment	1,303	1,063
Amortization of core deposit intangible	1,241	1,347
Issuance of common stock to Charitable Foundation	0	6,943
Bank-owned life insurance income	(763)	(745)
ESOP expense	782	488
Pension curtailment gain	0	(1,304)
Deferred tax expense (benefit)	274	(2,776)
Net change in:
Trading assets	0	750
Accrued interest receivable	(741)	227
Other assets	(3,441)	(4,909)
Accrued expenses and other liabilities	(6,875)	819
Net cash provided by operating activities	167	1,389
Activity in securities available for sale:
Purchases	(139,939)	(167,474)
Sales	91,197	171,254
Maturities/calls	5,632	8,660
Principal paydowns	23,211	16,013
Activity in securities held to maturity:
Purchases	(8,074)	0
Maturities/calls	3,000	0
Principal paydowns	4,108	0
Loan originations and purchases, net of paydowns	(236,228)	(271,844)
Proceeds from jumbo residential portfolio loan sale	7,608	16,457
Net purchases of premises and equipment	(2,000)	(1,439)
Purchase of FHLBB stock	0	(936)
Cash provided by business combination, net of purchase price	0	151,587
Net cash used in investing activities	(251,485)	(77,722)
Cash flows from financing activities:
Net change in deposits, excluding brokered deposits	96,484	(4,429)
Net change in brokered deposits	35,758	(32,918)
Net change in short-term borrowings	75,000	(95,000)
Repayment of long-term debt	10,000	(10,000)
Net proceeds from issuance of common stock	0	274,160
Acquisition of common stock by ESOP	0	(22,773)
Repurchase of common stock	(4,521)	0
Common stock dividends paid	(569)	0
Redemption of preferred stock	0	(18,724)
Preferred stock dividends paid	0	(438)
Net cash provided by financing activities	212,152	89,878
Net change in cash and cash equivalents	(39,166)	13,545
Cash and cash equivalents at beginning of year	60,146	40,316
Cash and cash equivalents at end of year	20,980	53,861
Supplementary information:
Interest paid	6,215	4,966
Income taxes paid, net of refunds	2,958	82
Amounts transferred from available-for-sale to held-to-maturity	196,958	0
Fair value of non-cash assets acquired	0	123,733
Fair value of liabilities assumed	0	275,320
Portfolio loans transferred to loans held for sale designation	$ 20,669	$ 18,218

Basis of Presentation and Conso

Basis of Presentation and Consolidation	9 Months Ended
	Sep. 30, 2015
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Basis of Presentation and Consolidation	BASIS OF PRESENTATION AND CONSOLIDATION Conversion Blue Hills Bancorp, Inc. (the “Company”) is a Maryland corporation formed in February 2014 for the purpose of becoming the holding company for Blue Hills Bank (the “Bank”) concurrent with the conversion of Hyde Park Bancorp, MHC 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 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”) for $22,773,450 . 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. 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. Basis of Presentation The accompanying unaudited interim consolidated financial statements include the accounts of the Company and its wholly-owned subsidiaries, Blue Hills Funding Corporation and the Bank, the principal operating entity, and the Bank's wholly-owned subsidiaries, HP Security Corporation and B.H. Security Corporation, which are Massachusetts security corporations, and 1196 Corporation, which holds a restricted stock. All significant intercompany balances and transactions have been eliminated in consolidation. The unaudited consolidated financial statements of the Company presented herein have been prepared in accordance with U.S. Generally Accepted Accounting Principles (“GAAP”) for interim financial information and pursuant to the rules of the Securities and Exchange Commission ("SEC") for quarterly reports on Form 10-Q and Article 8 of Regulation S-X and do not include all of the information and note disclosures required by GAAP for a complete set of financial statements. In the opinion of management, all adjustments (consisting of normal recurring adjustments) and disclosures necessary for the fair presentation of the accompanying consolidated financial statements have been included. Interim results are not necessarily reflective of the results of the year. The accompanying unaudited financial statements should be read in conjunction with the audited consolidated financial statements and notes thereto for the year ended December 31, 2014, included in the Company's annual report on Form 10-K. In preparing the consolidated financial statements, management is required to make estimates and assumptions that affect the reported amounts of assets and liabilities as of the date of the balance sheet and reported amounts of revenues and expenses during the reporting period. Actual results could differ from those estimates. Material estimates that are particularly susceptible to significant change in the near term relate to the determination of the allowance for loan losses and the realizability of deferred tax assets. Reclassification Certain amounts in the December 31, 2014 consolidated financial statements have been reclassified to conform to the 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 or cost recovery method until qualifying for return to accrual. Loans are returned to accrual status when all the principal and interest amounts contractually due 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. For portfolios for which the Company had no prior loss experience, the national and state peer group losses for relevant portfolios generally over the years 2007-2014 were used. Charge-off factors are updated at least quarterly and management assesses them quantitatively on a quarterly basis. 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 extrapolated historical loss experience based on FDIC data for depository institutions with assets of one billion to five billion for periods ranging from 2007-2014, adjusted for qualitative and environmental factors including changes to lending policies and procedures, economic and business conditions, portfolio characteristics, staff experience, problem loan trends, collateral values, concentrations and the competitive, legal and regulatory environment. 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 1 st or 2 nd 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. Commercial real estate - Loans in this segment include investment real estate and are generally secured by assignments of leases and real estate collateral. 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 may be adversely impacted by a downturn in the economy as evidenced by increased vacancy rates, which in turn, will have an effect on the credit quality in this segment. 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 real estate development loans for which payment is derived from permanent financing or sale of the property. Credit risk is affected by cost overruns, time to sell at an adequate price, and market conditions. 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 de bt. Economic conditions, real estate values, commodity prices, unemployment trends and other factors will affect the credit quality of loans in these segments. 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. Allocated component The allocated component relates to loans that are on the watch list (partially charged-off, non-accruing loans and accruing adversely-rated loans) or are 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. The impaired classification may be removed if the borrower demonstrates compliance with the modified terms and the restructuring agreement specifies an interest rate greater than or equal to that which would be provided to a borrower with similar credit risk 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.

Securities Available for Sale

Securities Available for Sale	9 Months Ended
	Sep. 30, 2015
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: September 30, 2015 Amortized Cost Gross Unrealized Gains Gross Unrealized Losses Fair Value (In thousands) Securities Available for Sale: Debt securities: Mortgage- and other asset-backed securities: Privately issued commercial mortgage-backed $ 14,291 $ 4 $ (124 ) $ 14,171 Other asset-backed 10,059 29 (69 ) 10,019 Total mortgage- and other asset-backed securities 24,350 33 (193 ) 24,190 State and political subdivisions 16,098 398 (25 ) 16,471 Financial services: Banks 21,289 202 (64 ) 21,427 Diversified financials 22,358 527 (46 ) 22,839 Insurance and REITs 15,293 39 (173 ) 15,159 Total financial services 58,940 768 (283 ) 59,425 Other corporate: Industrials 54,776 488 (845 ) 54,419 Utilities 31,220 62 (829 ) 30,453 Total other corporate 85,996 550 (1,674 ) 84,872 Total debt securities 185,384 1,749 (2,175 ) 184,958 Marketable equity securities: Mutual funds: Global equity 5,000 188 — 5,188 Domestic community 3,216 102 (9 ) 3,309 Global asset allocation 40,456 27 (2,241 ) 38,242 Total marketable equity securities 48,672 317 (2,250 ) 46,739 Total securities available for sale $ 234,056 $ 2,066 $ (4,425 ) $ 231,697 September 30, 2015 Amortized Cost Gross Unrealized Gains Gross Unrealized Losses Fair Value (In thousands) Securities Held to Maturity: Debt securities: U.S. Treasury $ 646 $ 1 $ — $ 647 Government-sponsored enterprises 29,285 116 — 29,401 Government-sponsored mortgage-backed and collateralized mortgage obligations 151,357 748 (13 ) 152,092 SBA asset-backed securities 16,344 58 — 16,402 Total securities held to maturity $ 197,632 $ 923 $ (13 ) $ 198,542 December 31, 2014 Amortized Cost Gross Unrealized Gains Gross Unrealized Losses Fair Value (In thousands) Securities Available for Sale: Debt securities: U.S. Treasury $ 13,037 $ 182 $ — $ 13,219 Government-sponsored enterprises 26,335 131 (29 ) 26,437 Government-sponsored mortgage-backed and collateralized mortgage obligations 160,091 756 (294 ) 160,553 Other mortgage- and asset-backed securities: Privately issued commercial mortgage-backed securities 22,100 30 (201 ) 21,929 SBA asset-backed securities 27,765 308 (27 ) 28,046 Other asset-backed securities 16,235 — (43 ) 16,192 Total other mortgage- and asset-backed securities 66,100 338 (271 ) 66,167 State and political subdivisions 15,619 567 (3 ) 16,183 Financial services: Banks 12,364 531 (6 ) 12,889 Diversified financials 15,796 354 (18 ) 16,132 Insurance and REITs 9,387 138 (9 ) 9,516 Total financial services 37,547 1,023 (33 ) 38,537 Other corporate: Industrials 34,408 681 (54 ) 35,035 Utilities 16,873 265 (120 ) 17,018 Total other corporate 51,281 946 (174 ) 52,053 Total debt securities 370,010 3,943 (804 ) 373,149 Marketable equity securities: Mutual funds: Global equity 5,000 623 — 5,623 Domestic community 3,216 86 (5 ) 3,297 Global asset allocation 32,956 1,498 (76 ) 34,378 Total marketable equity securities 41,172 2,207 (81 ) 43,298 Total securities available for sale $ 411,182 $ 6,150 $ (885 ) $ 416,447 During the third quarter of 2015, approximately $196.3 million of securities available for sale, with net unrealized gains of $666,000 , were reclassified to held-to-maturity designation. Held-to-maturity investments are investments that management has the positive intent and ability to hold to maturity. If a security is reclassified from available for sale to held to maturity, the fair value at the time of transfer becomes the security's new cost basis. The unrealized holding gain at the transfer date continues to be reported in other comprehensive income and is amortized over the security's remaining life as an adjustment of yield in a manner similar to a premium or discount. At September 30, 2015, there are $631,000 of net holding gains remaining in other comprehensive income. The amortized cost and estimated fair value of debt securities by contractual maturity at September 30, 2015 are included in the following table. 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. Available for Sale Held to Maturity Amortized Cost Fair Value Amortized Cost Fair Value (In thousands) Within 1 year $ 4,223 $ 4,235 $ 5,060 $ 5,062 After 1 year through 5 years 89,131 89,790 15,839 15,881 After 5 years through 10 years 59,079 58,052 9,032 9,105 After 10 years 8,601 8,691 — — 161,034 160,768 29,931 30,048 Mortgage- and asset-backed securities and collateralized mortgage obligations 24,350 24,190 167,701 168,494 $ 185,384 $ 184,958 $ 197,632 $ 198,542 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. For the nine months ended September 30, 2015 and 2014, proceeds from sales of securities available for sale amounted to $91.2 million and $171.3 million , respectively. Gross realized gains amounted to $1.9 million and $2.6 million , respectively, and gross realized losses amounted to $35,000 and $515,000 , respectively. Information pertaining to securities with gross unrealized losses aggregated by investment category and length of time that individual securities have been in a continuous loss position, follows: September 30, 2015 Less Than Twelve Months More Than Twelve Months Gross Unrealized Losses Fair Value Gross Unrealized Losses Fair Value (In thousands) Securities Available for Sale: Debt securities: Mortgage- and other asset-backed securities: Privately issued commercial mortgage- backed $ (32 ) $ 4,015 $ (92 ) $ 7,941 Other asset-backed (69 ) 5,001 — — Total mortgage- and other asset-backed securities (101 ) 9,016 (92 ) 7,941 State and political subdivisions (25 ) 3,362 — — Financial services: Banks (64 ) 12,228 — — Diversified financials (46 ) 3,562 — — Insurance and REITs (173 ) 11,105 — — Total financial services (283 ) 26,895 — — Other corporate: Industrials (845 ) 28,693 — — Utilities (632 ) 23,466 (197 ) 866 Total other corporate (1,477 ) 52,159 (197 ) 866 Total debt securities (1,886 ) 91,432 (289 ) 8,807 Marketable equity securities: Mutual funds: Domestic community — — (9 ) 457 Global asset allocation (2,241 ) 37,717 — — Total marketable equity securities (2,241 ) 37,717 (9 ) 457 Total temporarily impaired available-for-sale securities $ (4,127 ) $ 129,149 $ (298 ) $ 9,264 Securities Held to Maturity: Debt securities: U.S. Treasury $ — $ — $ — $ — Government-sponsored enterprises — — — — Government-sponsored mortgage-backed and collateralized mortgage obligations (13 ) 4,454 — — SBA asset-backed securities — — — — Total temporarily impaired held-to-maturity securities $ (13 ) $ 4,454 $ — $ — At September 30, 2015 , multiple debt securities have unrealized losses with aggregate depreciation of 2.1% from the Company’s amortized cost basis. The unrealized losses were primarily caused by interest rate fluctuations. 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 fair 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 September 30, 2015 . At September 30, 2015 , the Company had several mutual funds with an unrealized loss of $2,250,000 , or 5.6% depreciation from the Company’s cost basis. No issues have been identified that cause management to believe the declines in fair value are other than temporary and the Company has the ability and intent to hold these investments until a recovery of fair value. December 31, 2014 Less Than Twelve Months More Than Twelve Months Gross Unrealized Losses Fair Value Gross Unrealized Losses Fair Value (In thousands) Securities Available for Sale: Debt securities: Government-sponsored enterprises $ (12 ) $ 5,932 $ (17 ) $ 1,080 Government-sponsored mortgage-backed and collateralized mortgage obligations (190 ) 93,364 (104 ) 8,425 Other mortgage- and asset-backed securities: Privately issued commercial mortgage- backed securities (69 ) 9,412 (132 ) 8,759 SBA asset-backed securities (27 ) 5,529 — — Other asset-backed securities (43 ) 16,192 — — Total other mortgage- and asset-backed securities (139 ) 31,133 (132 ) 8,759 State and political subdivisions (3 ) 1,955 — Financial services: Banks (6 ) 2,907 — — Diversified financials (18 ) 7,676 — — Insurance and REITs (9 ) 4,177 — — Total financial services (33 ) 14,760 — — Other corporate: Industrials (54 ) 9,575 — — Utilities (120 ) 7,291 — — Total other corporate (174 ) 16,866 — — Total debt securities (551 ) 164,010 (253 ) 18,264 Marketable equity securities: Mutual funds: Domestic community — — (5 ) 462 Diversified bonds (76 ) 7,057 — — Total marketable equity securities (76 ) 7,057 (5 ) 462 Total temporarily impaired securities $ (627 ) $ 171,067 $ (258 ) $ 18,726

Loans and The Allowance for Loa

Loans and The Allowance for Loan Losses	9 Months Ended
	Sep. 30, 2015
Receivables [Abstract]
Loans and The Allowance for Loan Loss	LOANS AND THE ALLOWANCE FOR LOAN LOSSES A summary of the balances of loans follows: September 30, December 31, 2015 2014 (In thousands) Real estate: 1-4 family residential $ 539,506 $ 460,273 Home equity 73,432 61,750 Commercial real estate 499,057 387,807 Construction 54,528 53,606 1,166,523 963,436 Commercial business 164,164 151,823 Consumer 35,960 31,778 Total loans 1,366,647 1,147,037 Allowance for loan losses (15,082 ) (12,973 ) Discount and fair value adjustments on purchased loans (2,272 ) (3,850 ) Deferred loan costs and fees, net 2,827 2,700 Loans, net $ 1,352,120 $ 1,132,914 Activity in the allowance for loan losses for the three and nine months ended September 30, 2015 and 2014 and allocation of the allowance to loan segments as of September 30, 2015 and December 31, 2014 follows: 1-4 Family Residential Home Equity Commercial Real Estate Construction Commercial Business Consumer Unallocated Total (In thousands) Three Months Ended September 30, 2015 Allowance at June 30, 2015 $ 3,407 $ 419 $ 4,568 $ 1,024 $ 2,991 $ 680 $ 688 $ 13,777 Provision (credit) for loan losses 153 126 652 (302 ) 580 44 65 1,318 Loans charged-off — — — — — (13 ) — (13 ) Recoveries — — — — — — — — Allowance at September 30, 2015 $ 3,560 $ 545 $ 5,220 $ 722 $ 3,571 $ 711 $ 753 $ 15,082 Three Months Ended September 30, 2014 Allowance at June 30, 2014 $ 3,088 $ 305 $ 3,242 $ 699 $ 2,655 $ 645 $ 658 $ 11,292 Provision for loan losses 341 45 398 256 345 53 — 1,438 Loans charged-off — — — — — (9 ) — (9 ) Recoveries — — — — — — — — Allowance at September 30, 2014 $ 3,429 $ 350 $ 3,640 $ 955 $ 3,000 $ 689 $ 658 $ 12,721 1-4 Family Residential Home Equity Commercial Real Estate Construction Commercial Business Consumer Unallocated Total (In thousands) Nine Months Ended September 30, 2015 Allowance at December 31, 2014 $ 3,222 $ 340 $ 3,551 $ 1,056 $ 3,410 $ 736 $ 658 $ 12,973 Provision (credit) for loan losses 338 205 1,669 (334 ) 161 7 95 2,141 Loans charged-off — — — — — (32 ) — (32 ) Recoveries — — — — — — — — Allowance at September 30, 2015 $ 3,560 $ 545 $ 5,220 $ 722 $ 3,571 $ 711 $ 753 $ 15,082 Nine Months Ended September 30, 2014 Allowance at December 31, 2013 $ 2,835 $ 247 $ 2,608 $ 303 $ 2,416 $ 574 $ 688 $ 9,671 Provision (credit) for loan losses 613 103 1,032 652 584 157 (30 ) 3,111 Loans charged-off (19 ) — — — — (42 ) — (61 ) Recoveries — — — — — — — — Allowance at September 30, 2014 $ 3,429 $ 350 $ 3,640 $ 955 $ 3,000 $ 689 $ 658 $ 12,721 Additional information pertaining to the allowance for loan losses at September 30, 2015 and December 31, 2014 is as follows: 1-4 Family Home Commercial Construction Commercial Consumer Unallocated Total (In thousands) September 30, 2015 Allowance related to impaired loans $ — $ — $ — $ — $ — $ — $ — $ — Allowance related to non-impaired loans 3,560 545 5,220 722 3,571 711 753 15,082 Total allowance for loan losses $ 3,560 $ 545 $ 5,220 $ 722 $ 3,571 $ 711 $ 753 $ 15,082 Impaired loans $ 4,636 $ 733 $ — $ — $ — $ 150 $ — $ 5,519 Non-impaired loans 534,870 72,699 499,057 54,528 164,164 35,810 — 1,361,128 Total loans $ 539,506 $ 73,432 $ 499,057 $ 54,528 $ 164,164 $ 35,960 $ — $ 1,366,647 December 31, 2014 Allowance related to impaired loans $ — $ — $ — $ — $ — $ — $ — $ — Allowance related to non-impaired loans 3,222 340 3,551 1,056 3,410 736 658 12,973 Total allowance for loan losses $ 3,222 $ 340 $ 3,551 $ 1,056 $ 3,410 $ 736 $ 658 $ 12,973 Impaired loans $ 4,419 $ 578 $ — $ — $ — $ 27 $ — $ 5,024 Non-impaired loans 455,854 61,172 387,807 53,606 151,823 31,751 — 1,142,013 Total loans $ 460,273 $ 61,750 $ 387,807 $ 53,606 $ 151,823 $ 31,778 $ — $ 1,147,037 The following is a summary of past due and non-accrual loans, by loan class, at September 30, 2015 and December 31, 2014 : 30-59 Days Past Due 60-89 Days Past Due Past Due 90 Days or More Total Past Due Loans on Non-accrual (In thousands) September 30, 2015 Real estate: 1-4 family residential $ 922 $ 1,238 $ 712 $ 2,872 $ 4,116 Home equity 502 309 612 1,423 733 Commercial business 11 — — 11 — Consumer — 82 110 192 150 Total $ 1,435 $ 1,629 $ 1,434 $ 4,498 $ 4,999 December 31, 2014 Real estate: 1-4 family residential $ 3,137 $ 522 $ 1,370 $ 5,029 $ 3,876 Home equity 680 — 475 1,155 578 Consumer 217 — 5 222 $ 27 Total $ 4,034 $ 522 $ 1,850 $ 6,406 $ 4,481 There were no loans past due 90 days or more and still accruing interest at September 30, 2015 and December 31, 2014 . The following is a summary of information pertaining to impaired loans by loan class at the dates indicated: Recorded Investment Unpaid Principal Balance Related Allowance September 30, 2015 (In thousands) Impaired loans without a valuation allowance: Real estate: 1-4 family residential $ 4,636 $ 5,426 $ — Home equity 733 965 — Consumer 150 153 — Total $ 5,519 $ 6,544 $ — December 31, 2014 Impaired loans without a valuation allowance: Real estate: 1-4 family residential $ 4,419 $ 5,211 $ — Home equity 578 804 — Consumer 27 32 — Total $ 5,024 $ 6,047 $ — The following tables set forth information regarding average balances and interest income recognized (all on a cash basis) on impaired loans by class, for the periods indicated: Average Recorded Investment Interest Income Recognized Three Months Ended September 30, 2015 (In thousands) Real estate: 1-4 family residential $ 4,559 $ 53 Home equity 717 6 Consumer 95 1 Total $ 5,371 $ 60 Three Months Ended September 30, 2014 Real estate: 1-4 family residential $ 4,248 $ 49 Home Equity 658 4 Consumer 47 1 Total $ 4,953 $ 54 Average Recorded Investment Interest Income Recognized Nine Months Ended September 30, 2015 (In thousands) Real estate: 1-4 family residential $ 4,558 $ 196 Home equity 652 20 Consumer 62 3 Total $ 5,272 $ 219 Nine Months Ended September 30, 2014 Real estate: 1-4 family residential $ 3,903 $ 153 Home Equity 289 14 Consumer 23 3 Total $ 4,215 $ 170 No additional funds are committed to be advanced in connection with impaired loans. There were no troubled debt restructurings during the three months ended September 30, 2015. Troubled debt restructurings entered into during the nine months ended September 30, 2015 consisted of four residential loans that had pre-modification recorded investments totaling $ 946,000 and post modification recorded investment of $984,000 . Such loans were modified to capitalize past due interest. There were no troubled debt restructurings recorded during the three and nine months ended September 30, 2014 . There was one troubled debt restructuring that defaulted during the three and nine months ended September 30, 2015 , for which default was within one year of the restructure date. There were no troubled debt restructurings that defaulted during the three and nine months ending September 30, 2014. 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, and generally 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 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 9 are considered “doubtful.” Serious problems exist to the point where a partial loss of principal is likely. Weakness is so pronounced that on the basis of current information, conditions and values, collection in full is highly improbable. Loans rated 10 are considered "loss" and the credit extended to the customer is considered uncollectible or of such little value that it does not warrant consideration as an active asset. 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 commercial 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 September 30, 2015 and December 31, 2014 : 1-4 Family Residential Home Equity Commercial Real Estate Construction Commercial Business Consumer Total Loans (In thousands) September 30, 2015 Loans rated 1 - 6 $ 2,050 $ 468 $ 493,477 $ 54,528 $ 163,162 $ 5 $ 713,690 Loans rated 7 4,253 863 5,129 — 1,002 — 11,247 Loans rated 8 1,604 144 451 — — 153 2,352 Loans rated 9 703 — — — — — 703 Loans rated 10 — — — — — — — Loans not rated 530,896 71,957 — — — 35,802 638,655 $ 539,506 $ 73,432 $ 499,057 $ 54,528 $ 164,164 $ 35,960 $ 1,366,647 December 31, 2014 Loans rated 1 - 6 $ 3,381 $ 473 $ 387,651 $ 53,606 $ 150,960 $ 5 $ 596,076 Loans rated 7 3,095 852 156 — 863 — 4,966 Loans rated 8 1,331 — — — — 31 1,362 Loans rated 9 709 — — — — — 709 Loans rated 10 — — — — — — — Loans not rated 451,757 60,425 — — — 31,742 543,924 $ 460,273 $ 61,750 $ 387,807 $ 53,606 $ 151,823 $ 31,778 $ 1,147,037

Interest Rate Swap Agreements

Interest Rate Swap Agreements	9 Months Ended
	Sep. 30, 2015
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 table below presents information about derivative financial instruments not designated as hedging instruments at September 30, 2015 and December 31, 2014 . Derivative Gains Derivative Losses Notional Amount Fair Value Notional Amount Fair Value (In thousands) September 30, 2015 Economic hedges: Commercial loan level interest rate swap agreements $ 231,513 $ 9,730 $ 231,513 $ 10,373 Other contracts 8,379 12 10,505 102 Total derivatives $ 239,892 $ 9,742 $ 242,018 $ 10,475 December 31, 2014 Economic hedges: Commercial loan level interest rate swap agreements $ 202,970 $ 5,446 $ 202,970 $ 5,759 Other contracts 8,616 8 8,287 83 Total derivatives $ 211,586 $ 5,454 $ 211,257 $ 5,842 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	9 Months Ended
	Sep. 30, 2015
Banking and Thrift [Abstract]
Deposits	DEPOSITS A summary of deposit balances, by type, is as follows: September 30, December 31, 2015 2014 (In thousands) NOW and demand $ 284,720 $ 245,117 Regular savings 288,597 303,834 Money market 341,588 280,139 Brokered money market 33,924 23,166 Total non-certificate accounts 948,829 852,256 Term certificates of $100,000 or more 155,026 142,569 Term certificates less than $100,000 155,398 159,186 Brokered term certificates 85,705 58,705 Total certificate accounts 396,129 360,460 Total deposits $ 1,344,958 $ 1,212,716 At September 30, 2015 , the scheduled maturities of term certificate accounts, including brokered deposits, are as follows: Amount Weighted Average Rate (Dollars in thousands) Within 1 year $ 190,903 0.62 % 1-2 years 87,040 1.09 2-3 years 36,404 1.29 3-4 years 32,623 1.79 4 years and beyond 49,159 1.97 $ 396,129 1.05 %

Fair Value Measurements

Fair Value Measurements	9 Months Ended
	Sep. 30, 2015
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 assets and liabilities. 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 asset or liability. 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. 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. Treasury securities 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 : . Fair values 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 September 30, 2015 and December 31, 2014 , 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) September 30, 2015 Assets Securities available for sale: Debt securities $ — $ 184,958 $ — $ 184,958 Marketable equity securities 46,739 — — 46,739 Derivative assets — 9,742 — 9,742 Total assets $ 46,739 $ 194,700 $ — $ 241,439 Liabilities Derivative liabilities $ — $ 10,475 $ — $ 10,475 December 31, 2014 Assets Securities available for sale: Debt securities $ 13,219 $ 359,930 $ — $ 373,149 Marketable equity securities 43,298 — — 43,298 Derivative assets — 5,454 — 5,454 Total assets $ 56,517 $ 365,384 $ — $ 421,901 Liabilities Derivative liabilities $ — $ 5,842 $ — $ 5,842 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. At September 30, 2015 , there are no assets measured at fair value on a non-recurring basis. At December 31, 2014 , there was one impaired loan measured at fair value on a non-recurring basis using level 3 inputs, in the amount of $120,000 , with losses on this loan for the three and nine months ended September 30, 2014 amounting to $18,000 . At September 30, 2015 and December 31, 2014 there were no liabilities measured at fair value on a non-recurring basis. 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 Amount Fair Value Level 1 Level 2 Level 3 Total (In thousands) September 30, 2015 Financial assets: Cash and cash equivalents $ 20,980 $ 20,980 $ — $ — $ 20,980 Securities available for sale 231,697 46,739 184,958 — 231,697 Securities held to maturity 197,632 647 197,895 — 198,542 Federal Home Loan Bank stock 11,702 — — 11,702 11,702 Loans and loans held for sale 1,373,543 — — 1,347,827 1,347,827 Accrued interest receivable 5,174 — — 5,174 5,174 Financial liabilities: Deposits 1,344,958 — — 1,347,227 1,347,227 Borrowings 160,000 — 160,900 — 160,900 On-balance sheet derivative financial instruments: Interest rate swap agreements: Assets 9,742 — 9,742 — 9,742 Liabilities 10,475 — 10,475 — 10,475 December 31, 2014 Financial assets: Cash and cash equivalents $ 60,146 $ 60,146 $ — $ — $ 60,146 Securities available for sale 416,447 56,517 359,930 — 416,447 Federal Home Loan Bank stock 11,702 — — 11,702 11,702 Loans and loans held for sale 1,147,505 — — 1,132,024 1,132,024 Accrued interest receivable 4,433 — — 4,433 4,433 Financial liabilities: Deposits 1,212,716 — — 1,214,251 1,214,251 Borrowings 75,000 — 76,074 — 76,074 On-balance sheet derivative financial instruments: Interest rate swap agreements: Assets 5,454 — 5,454 — 5,454 Liabilities 5,842 — 5,842 — 5,842

Comprehensive Income

Comprehensive Income	9 Months Ended
	Sep. 30, 2015
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 stockholders' equity on the consolidated balance sheets, such items, along with net income, are components of comprehensive income. The components of accumulated other comprehensive income (loss), included in stockholders' equity, are as follows: September 30, December 31, 2015 2014 (In thousands) Securities available for sale: Net unrealized gain (loss) $ (2,359 ) $ 5,265 Tax effect 818 (1,873 ) Net-of-tax amount (1,541 ) 3,392 Securities held to maturity: Net unrealized gain on transferred securities 631 — Tax effect (252 ) — Net-of-tax amount 379 — Defined benefit pension plan: Unrecognized net actuarial loss (1,275 ) (1,358 ) Tax effect 513 543 Net-of-tax amount (762 ) (815 ) $ (1,924 ) $ 2,577 Changes in accumulated other comprehensive income (loss), by component, follow: Three Months Ended September 30, 2015 Securities Available for Sale Securities Held to Maturity Defined Benefit Pension Plan Total (In thousands) Balance at June 30, 2015 $ 1,980 $ — $ (781 ) $ 1,199 Other comprehensive loss before reclassification (4,508 ) — — (4,508 ) Realized gains reclassified (234 ) — — (234 ) Amortization of actuarial losses — — 27 27 Unrealized gains on securities reclassified as held to maturity (666 ) 666 — — Amortization of amounts previously recorded upon transfer to held-to-maturity from available-for-sale — (35 ) — (35 ) Tax effects 1,887 (252 ) (8 ) 1,627 Net current-period other comprehensive income (loss) (3,521 ) 379 19 (3,123 ) Balance at September 30, 2015 $ (1,541 ) $ 379 $ (762 ) $ (1,924 ) Three Months Ended September 30, 2014 Securities Available for Sale Securities Held to Maturity Defined Benefit Pension Plan Total (In thousands) Balance at June 30, 2014 $ 6,990 $ — $ 482 $ 7,472 Other comprehensive loss before reclassification (3,911 ) — (732 ) (4,643 ) Realized gains reclassified (349 ) — — (349 ) Amortization of actuarial gains — — (70 ) (70 ) Tax effects 1,539 — 320 1,859 Net current-period other comprehensive income (2,721 ) (482 ) (3,203 ) Balance at September 30, 2014 $ 4,269 $ — $ 4,269 Nine Months Ended September 30, 2015 Securities Available for Sale Securities Held to Maturity Defined Benefit Pension Plan Total (In thousands) Balance at December 31, 2014 $ 3,392 $ — $ (815 ) $ 2,577 Other comprehensive loss before reclassification (5,139 ) — — (5,139 ) Realized gains reclassified (1,819 ) — — (1,819 ) Amortization of actuarial gains — — 83 83 Unrealized gains on securities reclassified as held to maturity (666 ) 666 — — Amortization of amounts previously recorded upon transfer to held-to-maturity from available-for-sale — (35 ) — (35 ) Tax effects 2,691 (252 ) (30 ) 2,409 Net current-period other comprehensive income (4,933 ) 379 53 (4,501 ) Balance at September 30, 2015 $ (1,541 ) $ 379 $ (762 ) $ (1,924 ) Nine Months Ended September 30, 2014 Securities Available for Sale Securities Held to Maturity Defined Benefit Pension Plan Total (In thousands) Balance at December 31, 2013 $ 1,983 $ — $ 482 $ 2,465 Other comprehensive income (loss) before reclassification 5,846 — (732 ) 5,114 Realized gains reclassified (2,081 ) — — (2,081 ) Amortization of actuarial gains — — (70 ) (70 ) Tax effects (1,479 ) — 320 (1,159 ) Net current-period other comprehensive income 2,286 — (482 ) 1,804 Balance at September 30, 2014 $ 4,269 $ — $ — $ 4,269

Stockholders' Equity

Stockholders' Equity	9 Months Ended
	Sep. 30, 2015
Equity [Abstract]
Stockholders' Equity	STOCKHOLDERS' EQUITY 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 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 minimum ratios of Tier 1 capital to average assets (Leverage Ratio) and common equity Tier 1, Tier 1 and Total capital to risk-weighted assets. These capital guidelines assign risk weights to on- and off-balance sheet items in arriving at total risk-weighted assets. Minimum capital levels are based upon the perceived risk of various asset categories and certain off-balance sheet instruments. In July 2013, federal banking regulators approved final rules that implement changes to the regulatory capital framework for U.S. banks. The rules set minimum requirements for both the quantity and quality of capital held by community banking institutions. The final rule includes a new minimum ratio of common equity Tier 1 capital to risk weighted assets of 4.5% , raises the minimum ratio of Tier 1 capital to risk-weighted assets from 4% to 6% and includes a minimum leverage ratio of 4% for all banking organizations. Additionally, community banking institutions must maintain a capital conservation buffer of common equity Tier 1 capital in an amount greater than 2.5% of total risk-weighted assets to avoid being subject to limitations on capital distributions and discretionary bonus payments to executive officers. The phase-in period for the rules began for the Company on January 1, 2015, with full compliance with all of the final rule’s requirements phased in over a multi-year schedule. The final rules also apply, effective January 1, 2015, consolidated capital requirements to the Company that are not less stringent than those applicable to the Bank. As of September 30, 2015 , 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, Common Equity 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 September 30, 2015 and December 31, 2014 are presented below. Actual Minimum Capital Requirement Minimum To Be Well Capitalized Amount Ratio Amount Ratio Amount Ratio (Dollars in thousands) Blue Hills Bancorp, Inc.: September 30, 2015 Total capital (to risk weighted assets) $ 409,777 26.9 % $ 121,898 8.0 % $ 152,372 10.0 % Tier 1 capital (to risk weighted assets) 394,695 25.9 91,423 6.0 121,898 8.0 Common equity Tier 1(to risk weighted assets) 394,695 25.9 68,568 4.5 99,042 6.5 Tier 1 capital (to average assets) 394,695 21.3 74,302 4.0 92,878 5.0 December 31, 2014 Total capital (to risk weighted assets) $ 409,545 32.6 % $ 100,513 8.0 % N/A N/A Tier 1 capital (to risk weighted assets) 395,615 31.5 50,527 4.0 N/A N/A Common equity Tier 1(to risk weighted assets) N/A N/A N/A N/A N/A N/A Tier 1 capital (to average assets) 395,615 23.3 67,820 4.0 N/A N/A Blue Hills Bank: September 30, 2015 Total capital (to risk weighted assets) $ 292,580 19.2 % $ 121,843 8.0 % $ 152,304 10.0 % Tier 1 capital (to risk weighted assets) 277,498 18.2 91,383 6.0 121,843 8.0 Common equity Tier 1(to risk weighted assets) 277,498 18.2 68,537 4.5 98,998 6.5 Tier 1 capital (to average assets) 277,498 15.0 74,083 4.0 92,603 5.0 December 31, 2014 Total capital (to risk weighted assets) $ 283,443 22.7 % $ 99,973 8.0 % $ 124,966 10.0 % Tier 1 capital (to risk weighted assets) 269,513 21.6 49,987 4.0 74,980 6.0 Common equity Tier 1(to risk weighted assets) N/A N/A N/A N/A N/A N/A Tier 1 capital (to average assets) 269,513 15.9 67,707 4.0 84,634 5.0

Employee Stock Ownership Plan

Employee Stock Ownership Plan	9 Months Ended
	Sep. 30, 2015
Compensation and Retirement Disclosure [Abstract]
Employee Stock Ownership Plan	EMPLOYEE STOCK OWNERSHIP PLAN The Company maintains an Employee Stock Ownership Plan (“ESOP”) to provide eligible employees the opportunity to own Company stock. This plan is a tax-qualified retirement plan for the benefit of Company employees. Contributions are allocated to eligible participants on the basis of compensation, subject to federal tax limits. The number of shares committed to be released per year is 75,912 through 2043. Shares held by the ESOP include the following: September 30, 2015 Allocated 75,912 Committed to be allocated 56,778 Unallocated 2,144,655 2,277,345 The fair value of unallocated shares was approximately $29.7 million at September 30, 2015 . Total compensation expense recognized in connection with the ESOP for the three and nine months ended September 30, 2015 was $274,000 and $782,000 . Compensation expense recognized in connection with the ESOP during the three and nine months ended September 30, 2014 was $488,000 .

Earnings Per Common Share

Earnings Per Common Share	9 Months Ended
	Sep. 30, 2015
Earnings Per Share [Abstract]
Earnings Per Common Share	EARNINGS PER COMMON SHARE Basic earnings per share represents income available to common stockholders divided by the weighted-average number of common shares outstanding during the period. Unallocated ESOP shares are not deemed outstanding for earnings per share calculations. There were no potentially dilutive common stock equivalents as of September 30, 2015 . Earnings per share is not applicable for the periods ended September 30, 2014 . Three Months Ended Nine Months Ended September 30, 2015 September 30, 2015 (In thousands, except share amounts) Net income applicable to common stock $ 1,810 $ 4,815 Average number of common shares outstanding 28,337,603 28,423,110 Less: Average unallocated ESOP shares (2,154,222 ) (2,173,045 ) Average number of common shares outstanding used to calculate basic and diluted earnings per common share 26,183,381 26,250,065 Earnings per common share: Basic $ 0.07 $ 0.18 Diluted $ 0.07 $ 0.18 See Note 11 regarding the grant of restricted stock awards and stock options subsequent to September 30, 2015.

Subsequent Events

Subsequent Events	9 Months Ended
	Sep. 30, 2015
Subsequent Events [Abstract]
Subsequent Events	SUBSEQUENT EVENTS Under the Blue Hills Bancorp, Inc. 2015 Equity Incentive Plan (the "Equity Plan"), the Company may grant options, restricted stock or restricted units to its directors, officers and employees. Both incentive stock options and non-qualified stock options may be granted under the Plan, with the total shares reserved for options equaling 2,846,681 . The exercise price of each option equals the market price of the Company’s stock on the date of grant and the maximum term of each option is ten years . The total number of shares reserved for restricted stock or restricted units is 1,138,673 . Shares awarded vest ratably over five years . The fair value of shares awarded is based on the market price at the date of grant. On October 7, 2015, the Company granted 2,434,000 stock options and 983,175 restricted stock awards under the Equity Plan to its directors, officers and employees, including the Company’s named executive officers. As of October 7, 2015, unrecognized share-based compensation expense related to nonvested options and restricted awards amounted to approximately $10.1 million and $13.8 million , respectively. This amount is expected to be recognized over a weighted average period of five years . On November 9, 2015 the Company signed a lease for a new branch location in the Seaport area of Boston, with an anticipated opening in 2016.

Basis of Presentation and Con21

Basis of Presentation and Consolidation (Policies)	9 Months Ended
	Sep. 30, 2015
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Basis of Presentation	Basis of Presentation The accompanying unaudited interim consolidated financial statements include the accounts of the Company and its wholly-owned subsidiaries, Blue Hills Funding Corporation and the Bank, the principal operating entity, and the Bank's wholly-owned subsidiaries, HP Security Corporation and B.H. Security Corporation, which are Massachusetts security corporations, and 1196 Corporation, which holds a restricted stock. All significant intercompany balances and transactions have been eliminated in consolidation. The unaudited consolidated financial statements of the Company presented herein have been prepared in accordance with U.S. Generally Accepted Accounting Principles (“GAAP”) for interim financial information and pursuant to the rules of the Securities and Exchange Commission ("SEC") for quarterly reports on Form 10-Q and Article 8 of Regulation S-X and do not include all of the information and note disclosures required by GAAP for a complete set of financial statements. In the opinion of management, all adjustments (consisting of normal recurring adjustments) and disclosures necessary for the fair presentation of the accompanying consolidated financial statements have been included. Interim results are not necessarily reflective of the results of the year. The accompanying unaudited financial statements should be read in conjunction with the audited consolidated financial statements and notes thereto for the year ended December 31, 2014, included in the Company's annual report on Form 10-K. In preparing the consolidated financial statements, management is required to make estimates and assumptions that affect the reported amounts of assets and liabilities as of the date of the balance sheet and reported amounts of revenues and expenses during the reporting period. Actual results could differ from those estimates. Material estimates that are particularly susceptible to significant change in the near term relate to the determination of the allowance for loan losses and the realizability of deferred tax assets.
Reclassification	Reclassification Certain amounts in the December 31, 2014 consolidated financial statements have been reclassified to conform to the current presentation.
Loans	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 or cost recovery method until qualifying for return to accrual. Loans are returned to accrual status when all the principal and interest amounts contractually due have been current for six consecutive months and future payments are reasonably assured.
Allowance for Loan Losses	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. For portfolios for which the Company had no prior loss experience, the national and state peer group losses for relevant portfolios generally over the years 2007-2014 were used. Charge-off factors are updated at least quarterly and management assesses them quantitatively on a quarterly basis. 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 extrapolated historical loss experience based on FDIC data for depository institutions with assets of one billion to five billion for periods ranging from 2007-2014, adjusted for qualitative and environmental factors including changes to lending policies and procedures, economic and business conditions, portfolio characteristics, staff experience, problem loan trends, collateral values, concentrations and the competitive, legal and regulatory environment. 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 1 st or 2 nd 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. Commercial real estate - Loans in this segment include investment real estate and are generally secured by assignments of leases and real estate collateral. 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 may be adversely impacted by a downturn in the economy as evidenced by increased vacancy rates, which in turn, will have an effect on the credit quality in this segment. 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 real estate development loans for which payment is derived from permanent financing or sale of the property. Credit risk is affected by cost overruns, time to sell at an adequate price, and market conditions. 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 de bt. Economic conditions, real estate values, commodity prices, unemployment trends and other factors will affect the credit quality of loans in these segments. 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. Allocated component The allocated component relates to loans that are on the watch list (partially charged-off, non-accruing loans and accruing adversely-rated loans) or are 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. The impaired classification may be removed if the borrower demonstrates compliance with the modified terms and the restructuring agreement specifies an interest rate greater than or equal to that which would be provided to a borrower with similar credit risk 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.

Securities Available for Sale (

Securities Available for Sale (Tables)	9 Months Ended
	Sep. 30, 2015
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: September 30, 2015 Amortized Cost Gross Unrealized Gains Gross Unrealized Losses Fair Value (In thousands) Securities Available for Sale: Debt securities: Mortgage- and other asset-backed securities: Privately issued commercial mortgage-backed $ 14,291 $ 4 $ (124 ) $ 14,171 Other asset-backed 10,059 29 (69 ) 10,019 Total mortgage- and other asset-backed securities 24,350 33 (193 ) 24,190 State and political subdivisions 16,098 398 (25 ) 16,471 Financial services: Banks 21,289 202 (64 ) 21,427 Diversified financials 22,358 527 (46 ) 22,839 Insurance and REITs 15,293 39 (173 ) 15,159 Total financial services 58,940 768 (283 ) 59,425 Other corporate: Industrials 54,776 488 (845 ) 54,419 Utilities 31,220 62 (829 ) 30,453 Total other corporate 85,996 550 (1,674 ) 84,872 Total debt securities 185,384 1,749 (2,175 ) 184,958 Marketable equity securities: Mutual funds: Global equity 5,000 188 — 5,188 Domestic community 3,216 102 (9 ) 3,309 Global asset allocation 40,456 27 (2,241 ) 38,242 Total marketable equity securities 48,672 317 (2,250 ) 46,739 Total securities available for sale $ 234,056 $ 2,066 $ (4,425 ) $ 231,697 December 31, 2014 Amortized Cost Gross Unrealized Gains Gross Unrealized Losses Fair Value (In thousands) Securities Available for Sale: Debt securities: U.S. Treasury $ 13,037 $ 182 $ — $ 13,219 Government-sponsored enterprises 26,335 131 (29 ) 26,437 Government-sponsored mortgage-backed and collateralized mortgage obligations 160,091 756 (294 ) 160,553 Other mortgage- and asset-backed securities: Privately issued commercial mortgage-backed securities 22,100 30 (201 ) 21,929 SBA asset-backed securities 27,765 308 (27 ) 28,046 Other asset-backed securities 16,235 — (43 ) 16,192 Total other mortgage- and asset-backed securities 66,100 338 (271 ) 66,167 State and political subdivisions 15,619 567 (3 ) 16,183 Financial services: Banks 12,364 531 (6 ) 12,889 Diversified financials 15,796 354 (18 ) 16,132 Insurance and REITs 9,387 138 (9 ) 9,516 Total financial services 37,547 1,023 (33 ) 38,537 Other corporate: Industrials 34,408 681 (54 ) 35,035 Utilities 16,873 265 (120 ) 17,018 Total other corporate 51,281 946 (174 ) 52,053 Total debt securities 370,010 3,943 (804 ) 373,149 Marketable equity securities: Mutual funds: Global equity 5,000 623 — 5,623 Domestic community 3,216 86 (5 ) 3,297 Global asset allocation 32,956 1,498 (76 ) 34,378 Total marketable equity securities 41,172 2,207 (81 ) 43,298 Total securities available for sale $ 411,182 $ 6,150 $ (885 ) $ 416,447
Held-to-maturity Securities	September 30, 2015 Amortized Cost Gross Unrealized Gains Gross Unrealized Losses Fair Value (In thousands) Securities Held to Maturity: Debt securities: U.S. Treasury $ 646 $ 1 $ — $ 647 Government-sponsored enterprises 29,285 116 — 29,401 Government-sponsored mortgage-backed and collateralized mortgage obligations 151,357 748 (13 ) 152,092 SBA asset-backed securities 16,344 58 — 16,402 Total securities held to maturity $ 197,632 $ 923 $ (13 ) $ 198,542
Investments Classified by Contractual Maturity Date	The amortized cost and estimated fair value of debt securities by contractual maturity at September 30, 2015 are included in the following table. 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. Available for Sale Held to Maturity Amortized Cost Fair Value Amortized Cost Fair Value (In thousands) Within 1 year $ 4,223 $ 4,235 $ 5,060 $ 5,062 After 1 year through 5 years 89,131 89,790 15,839 15,881 After 5 years through 10 years 59,079 58,052 9,032 9,105 After 10 years 8,601 8,691 — — 161,034 160,768 29,931 30,048 Mortgage- and asset-backed securities and collateralized mortgage obligations 24,350 24,190 167,701 168,494 $ 185,384 $ 184,958 $ 197,632 $ 198,542
Unrealized Gain (Loss) and Fair Value of Investments - Available-for-sale Securities	Information pertaining to securities with gross unrealized losses aggregated by investment category and length of time that individual securities have been in a continuous loss position, follows: September 30, 2015 Less Than Twelve Months More Than Twelve Months Gross Unrealized Losses Fair Value Gross Unrealized Losses Fair Value (In thousands) Securities Available for Sale: Debt securities: Mortgage- and other asset-backed securities: Privately issued commercial mortgage- backed $ (32 ) $ 4,015 $ (92 ) $ 7,941 Other asset-backed (69 ) 5,001 — — Total mortgage- and other asset-backed securities (101 ) 9,016 (92 ) 7,941 State and political subdivisions (25 ) 3,362 — — Financial services: Banks (64 ) 12,228 — — Diversified financials (46 ) 3,562 — — Insurance and REITs (173 ) 11,105 — — Total financial services (283 ) 26,895 — — Other corporate: Industrials (845 ) 28,693 — — Utilities (632 ) 23,466 (197 ) 866 Total other corporate (1,477 ) 52,159 (197 ) 866 Total debt securities (1,886 ) 91,432 (289 ) 8,807 Marketable equity securities: Mutual funds: Domestic community — — (9 ) 457 Global asset allocation (2,241 ) 37,717 — — Total marketable equity securities (2,241 ) 37,717 (9 ) 457 Total temporarily impaired available-for-sale securities $ (4,127 ) $ 129,149 $ (298 ) $ 9,264 December 31, 2014 Less Than Twelve Months More Than Twelve Months Gross Unrealized Losses Fair Value Gross Unrealized Losses Fair Value (In thousands) Securities Available for Sale: Debt securities: Government-sponsored enterprises $ (12 ) $ 5,932 $ (17 ) $ 1,080 Government-sponsored mortgage-backed and collateralized mortgage obligations (190 ) 93,364 (104 ) 8,425 Other mortgage- and asset-backed securities: Privately issued commercial mortgage- backed securities (69 ) 9,412 (132 ) 8,759 SBA asset-backed securities (27 ) 5,529 — — Other asset-backed securities (43 ) 16,192 — — Total other mortgage- and asset-backed securities (139 ) 31,133 (132 ) 8,759 State and political subdivisions (3 ) 1,955 — Financial services: Banks (6 ) 2,907 — — Diversified financials (18 ) 7,676 — — Insurance and REITs (9 ) 4,177 — — Total financial services (33 ) 14,760 — — Other corporate: Industrials (54 ) 9,575 — — Utilities (120 ) 7,291 — — Total other corporate (174 ) 16,866 — — Total debt securities (551 ) 164,010 (253 ) 18,264 Marketable equity securities: Mutual funds: Domestic community — — (5 ) 462 Diversified bonds (76 ) 7,057 — — Total marketable equity securities (76 ) 7,057 (5 ) 462 Total temporarily impaired securities $ (627 ) $ 171,067 $ (258 ) $ 18,726
Unrealized Gain (Loss) and Fair Value of Investments - Held-to-maturity Securities	Securities Held to Maturity: Debt securities: U.S. Treasury $ — $ — $ — $ — Government-sponsored enterprises — — — — Government-sponsored mortgage-backed and collateralized mortgage obligations (13 ) 4,454 — — SBA asset-backed securities — — — — Total temporarily impaired held-to-maturity securities $ (13 ) $ 4,454 $ — $ —

Loans and The Allowance for L23

Loans and The Allowance for Loan Losses (Tables)	9 Months Ended
	Sep. 30, 2015
Receivables [Abstract]
Schedule of Accounts, Notes, Loans and Financing Receivable	A summary of the balances of loans follows: September 30, December 31, 2015 2014 (In thousands) Real estate: 1-4 family residential $ 539,506 $ 460,273 Home equity 73,432 61,750 Commercial real estate 499,057 387,807 Construction 54,528 53,606 1,166,523 963,436 Commercial business 164,164 151,823 Consumer 35,960 31,778 Total loans 1,366,647 1,147,037 Allowance for loan losses (15,082 ) (12,973 ) Discount and fair value adjustments on purchased loans (2,272 ) (3,850 ) Deferred loan costs and fees, net 2,827 2,700 Loans, net $ 1,352,120 $ 1,132,914
Activity in Allowance for Loan Losses	Activity in the allowance for loan losses for the three and nine months ended September 30, 2015 and 2014 and allocation of the allowance to loan segments as of September 30, 2015 and December 31, 2014 follows: 1-4 Family Residential Home Equity Commercial Real Estate Construction Commercial Business Consumer Unallocated Total (In thousands) Three Months Ended September 30, 2015 Allowance at June 30, 2015 $ 3,407 $ 419 $ 4,568 $ 1,024 $ 2,991 $ 680 $ 688 $ 13,777 Provision (credit) for loan losses 153 126 652 (302 ) 580 44 65 1,318 Loans charged-off — — — — — (13 ) — (13 ) Recoveries — — — — — — — — Allowance at September 30, 2015 $ 3,560 $ 545 $ 5,220 $ 722 $ 3,571 $ 711 $ 753 $ 15,082 Three Months Ended September 30, 2014 Allowance at June 30, 2014 $ 3,088 $ 305 $ 3,242 $ 699 $ 2,655 $ 645 $ 658 $ 11,292 Provision for loan losses 341 45 398 256 345 53 — 1,438 Loans charged-off — — — — — (9 ) — (9 ) Recoveries — — — — — — — — Allowance at September 30, 2014 $ 3,429 $ 350 $ 3,640 $ 955 $ 3,000 $ 689 $ 658 $ 12,721 1-4 Family Residential Home Equity Commercial Real Estate Construction Commercial Business Consumer Unallocated Total (In thousands) Nine Months Ended September 30, 2015 Allowance at December 31, 2014 $ 3,222 $ 340 $ 3,551 $ 1,056 $ 3,410 $ 736 $ 658 $ 12,973 Provision (credit) for loan losses 338 205 1,669 (334 ) 161 7 95 2,141 Loans charged-off — — — — — (32 ) — (32 ) Recoveries — — — — — — — — Allowance at September 30, 2015 $ 3,560 $ 545 $ 5,220 $ 722 $ 3,571 $ 711 $ 753 $ 15,082 Nine Months Ended September 30, 2014 Allowance at December 31, 2013 $ 2,835 $ 247 $ 2,608 $ 303 $ 2,416 $ 574 $ 688 $ 9,671 Provision (credit) for loan losses 613 103 1,032 652 584 157 (30 ) 3,111 Loans charged-off (19 ) — — — — (42 ) — (61 ) Recoveries — — — — — — — — Allowance at September 30, 2014 $ 3,429 $ 350 $ 3,640 $ 955 $ 3,000 $ 689 $ 658 $ 12,721
Allowance for Credit Losses on Financing Receivables	Additional information pertaining to the allowance for loan losses at September 30, 2015 and December 31, 2014 is as follows: 1-4 Family Home Commercial Construction Commercial Consumer Unallocated Total (In thousands) September 30, 2015 Allowance related to impaired loans $ — $ — $ — $ — $ — $ — $ — $ — Allowance related to non-impaired loans 3,560 545 5,220 722 3,571 711 753 15,082 Total allowance for loan losses $ 3,560 $ 545 $ 5,220 $ 722 $ 3,571 $ 711 $ 753 $ 15,082 Impaired loans $ 4,636 $ 733 $ — $ — $ — $ 150 $ — $ 5,519 Non-impaired loans 534,870 72,699 499,057 54,528 164,164 35,810 — 1,361,128 Total loans $ 539,506 $ 73,432 $ 499,057 $ 54,528 $ 164,164 $ 35,960 $ — $ 1,366,647 December 31, 2014 Allowance related to impaired loans $ — $ — $ — $ — $ — $ — $ — $ — Allowance related to non-impaired loans 3,222 340 3,551 1,056 3,410 736 658 12,973 Total allowance for loan losses $ 3,222 $ 340 $ 3,551 $ 1,056 $ 3,410 $ 736 $ 658 $ 12,973 Impaired loans $ 4,419 $ 578 $ — $ — $ — $ 27 $ — $ 5,024 Non-impaired loans 455,854 61,172 387,807 53,606 151,823 31,751 — 1,142,013 Total loans $ 460,273 $ 61,750 $ 387,807 $ 53,606 $ 151,823 $ 31,778 $ — $ 1,147,037
Past Due Financing Receivables	The following is a summary of past due and non-accrual loans, by loan class, at September 30, 2015 and December 31, 2014 : 30-59 Days Past Due 60-89 Days Past Due Past Due 90 Days or More Total Past Due Loans on Non-accrual (In thousands) September 30, 2015 Real estate: 1-4 family residential $ 922 $ 1,238 $ 712 $ 2,872 $ 4,116 Home equity 502 309 612 1,423 733 Commercial business 11 — — 11 — Consumer — 82 110 192 150 Total $ 1,435 $ 1,629 $ 1,434 $ 4,498 $ 4,999 December 31, 2014 Real estate: 1-4 family residential $ 3,137 $ 522 $ 1,370 $ 5,029 $ 3,876 Home equity 680 — 475 1,155 578 Consumer 217 — 5 222 $ 27 Total $ 4,034 $ 522 $ 1,850 $ 6,406 $ 4,481
Impaired Financing Receivables	The following tables set forth information regarding average balances and interest income recognized (all on a cash basis) on impaired loans by class, for the periods indicated: Average Recorded Investment Interest Income Recognized Three Months Ended September 30, 2015 (In thousands) Real estate: 1-4 family residential $ 4,559 $ 53 Home equity 717 6 Consumer 95 1 Total $ 5,371 $ 60 Three Months Ended September 30, 2014 Real estate: 1-4 family residential $ 4,248 $ 49 Home Equity 658 4 Consumer 47 1 Total $ 4,953 $ 54 Average Recorded Investment Interest Income Recognized Nine Months Ended September 30, 2015 (In thousands) Real estate: 1-4 family residential $ 4,558 $ 196 Home equity 652 20 Consumer 62 3 Total $ 5,272 $ 219 Nine Months Ended September 30, 2014 Real estate: 1-4 family residential $ 3,903 $ 153 Home Equity 289 14 Consumer 23 3 Total $ 4,215 $ 170 The following is a summary of information pertaining to impaired loans by loan class at the dates indicated: Recorded Investment Unpaid Principal Balance Related Allowance September 30, 2015 (In thousands) Impaired loans without a valuation allowance: Real estate: 1-4 family residential $ 4,636 $ 5,426 $ — Home equity 733 965 — Consumer 150 153 — Total $ 5,519 $ 6,544 $ — December 31, 2014 Impaired loans without a valuation allowance: Real estate: 1-4 family residential $ 4,419 $ 5,211 $ — Home equity 578 804 — Consumer 27 32 — Total $ 5,024 $ 6,047 $ —
Financing Receivable Credit Quality Indicators	The following tables present the Company’s loans by risk rating at September 30, 2015 and December 31, 2014 : 1-4 Family Residential Home Equity Commercial Real Estate Construction Commercial Business Consumer Total Loans (In thousands) September 30, 2015 Loans rated 1 - 6 $ 2,050 $ 468 $ 493,477 $ 54,528 $ 163,162 $ 5 $ 713,690 Loans rated 7 4,253 863 5,129 — 1,002 — 11,247 Loans rated 8 1,604 144 451 — — 153 2,352 Loans rated 9 703 — — — — — 703 Loans rated 10 — — — — — — — Loans not rated 530,896 71,957 — — — 35,802 638,655 $ 539,506 $ 73,432 $ 499,057 $ 54,528 $ 164,164 $ 35,960 $ 1,366,647 December 31, 2014 Loans rated 1 - 6 $ 3,381 $ 473 $ 387,651 $ 53,606 $ 150,960 $ 5 $ 596,076 Loans rated 7 3,095 852 156 — 863 — 4,966 Loans rated 8 1,331 — — — — 31 1,362 Loans rated 9 709 — — — — — 709 Loans rated 10 — — — — — — — Loans not rated 451,757 60,425 — — — 31,742 543,924 $ 460,273 $ 61,750 $ 387,807 $ 53,606 $ 151,823 $ 31,778 $ 1,147,037

Interest Rate Swap Agreements (

Interest Rate Swap Agreements (Tables)	9 Months Ended
	Sep. 30, 2015
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 September 30, 2015 and December 31, 2014 . Derivative Gains Derivative Losses Notional Amount Fair Value Notional Amount Fair Value (In thousands) September 30, 2015 Economic hedges: Commercial loan level interest rate swap agreements $ 231,513 $ 9,730 $ 231,513 $ 10,373 Other contracts 8,379 12 10,505 102 Total derivatives $ 239,892 $ 9,742 $ 242,018 $ 10,475 December 31, 2014 Economic hedges: Commercial loan level interest rate swap agreements $ 202,970 $ 5,446 $ 202,970 $ 5,759 Other contracts 8,616 8 8,287 83 Total derivatives $ 211,586 $ 5,454 $ 211,257 $ 5,842

Deposits (Tables)

Deposits (Tables)	9 Months Ended
	Sep. 30, 2015
Banking and Thrift [Abstract]
Schedule of Deposit Balances	A summary of deposit balances, by type, is as follows: September 30, December 31, 2015 2014 (In thousands) NOW and demand $ 284,720 $ 245,117 Regular savings 288,597 303,834 Money market 341,588 280,139 Brokered money market 33,924 23,166 Total non-certificate accounts 948,829 852,256 Term certificates of $100,000 or more 155,026 142,569 Term certificates less than $100,000 155,398 159,186 Brokered term certificates 85,705 58,705 Total certificate accounts 396,129 360,460 Total deposits $ 1,344,958 $ 1,212,716
Schedule of Contractual Maturities of Deposits and Weighted Average Rate	At September 30, 2015 , the scheduled maturities of term certificate accounts, including brokered deposits, are as follows: Amount Weighted Average Rate (Dollars in thousands) Within 1 year $ 190,903 0.62 % 1-2 years 87,040 1.09 2-3 years 36,404 1.29 3-4 years 32,623 1.79 4 years and beyond 49,159 1.97 $ 396,129 1.05 %

Fair Value Measurements (Tables

Fair Value Measurements (Tables)	9 Months Ended
	Sep. 30, 2015
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) September 30, 2015 Assets Securities available for sale: Debt securities $ — $ 184,958 $ — $ 184,958 Marketable equity securities 46,739 — — 46,739 Derivative assets — 9,742 — 9,742 Total assets $ 46,739 $ 194,700 $ — $ 241,439 Liabilities Derivative liabilities $ — $ 10,475 $ — $ 10,475 December 31, 2014 Assets Securities available for sale: Debt securities $ 13,219 $ 359,930 $ — $ 373,149 Marketable equity securities 43,298 — — 43,298 Derivative assets — 5,454 — 5,454 Total assets $ 56,517 $ 365,384 $ — $ 421,901 Liabilities Derivative liabilities $ — $ 5,842 $ — $ 5,842
Fair Value, by Balance Sheet Grouping	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 Amount Fair Value Level 1 Level 2 Level 3 Total (In thousands) September 30, 2015 Financial assets: Cash and cash equivalents $ 20,980 $ 20,980 $ — $ — $ 20,980 Securities available for sale 231,697 46,739 184,958 — 231,697 Securities held to maturity 197,632 647 197,895 — 198,542 Federal Home Loan Bank stock 11,702 — — 11,702 11,702 Loans and loans held for sale 1,373,543 — — 1,347,827 1,347,827 Accrued interest receivable 5,174 — — 5,174 5,174 Financial liabilities: Deposits 1,344,958 — — 1,347,227 1,347,227 Borrowings 160,000 — 160,900 — 160,900 On-balance sheet derivative financial instruments: Interest rate swap agreements: Assets 9,742 — 9,742 — 9,742 Liabilities 10,475 — 10,475 — 10,475 December 31, 2014 Financial assets: Cash and cash equivalents $ 60,146 $ 60,146 $ — $ — $ 60,146 Securities available for sale 416,447 56,517 359,930 — 416,447 Federal Home Loan Bank stock 11,702 — — 11,702 11,702 Loans and loans held for sale 1,147,505 — — 1,132,024 1,132,024 Accrued interest receivable 4,433 — — 4,433 4,433 Financial liabilities: Deposits 1,212,716 — — 1,214,251 1,214,251 Borrowings 75,000 — 76,074 — 76,074 On-balance sheet derivative financial instruments: Interest rate swap agreements: Assets 5,454 — 5,454 — 5,454 Liabilities 5,842 — 5,842 — 5,842

Comprehensive Income (Tables)

Comprehensive Income (Tables)	9 Months Ended
	Sep. 30, 2015
Equity [Abstract]
Schedule of Accumulated Other Comprehensive Income (Loss)	The components of accumulated other comprehensive income (loss), included in stockholders' equity, are as follows: September 30, December 31, 2015 2014 (In thousands) Securities available for sale: Net unrealized gain (loss) $ (2,359 ) $ 5,265 Tax effect 818 (1,873 ) Net-of-tax amount (1,541 ) 3,392 Securities held to maturity: Net unrealized gain on transferred securities 631 — Tax effect (252 ) — Net-of-tax amount 379 — Defined benefit pension plan: Unrecognized net actuarial loss (1,275 ) (1,358 ) Tax effect 513 543 Net-of-tax amount (762 ) (815 ) $ (1,924 ) $ 2,577 Changes in accumulated other comprehensive income (loss), by component, follow: Three Months Ended September 30, 2015 Securities Available for Sale Securities Held to Maturity Defined Benefit Pension Plan Total (In thousands) Balance at June 30, 2015 $ 1,980 $ — $ (781 ) $ 1,199 Other comprehensive loss before reclassification (4,508 ) — — (4,508 ) Realized gains reclassified (234 ) — — (234 ) Amortization of actuarial losses — — 27 27 Unrealized gains on securities reclassified as held to maturity (666 ) 666 — — Amortization of amounts previously recorded upon transfer to held-to-maturity from available-for-sale — (35 ) — (35 ) Tax effects 1,887 (252 ) (8 ) 1,627 Net current-period other comprehensive income (loss) (3,521 ) 379 19 (3,123 ) Balance at September 30, 2015 $ (1,541 ) $ 379 $ (762 ) $ (1,924 ) Three Months Ended September 30, 2014 Securities Available for Sale Securities Held to Maturity Defined Benefit Pension Plan Total (In thousands) Balance at June 30, 2014 $ 6,990 $ — $ 482 $ 7,472 Other comprehensive loss before reclassification (3,911 ) — (732 ) (4,643 ) Realized gains reclassified (349 ) — — (349 ) Amortization of actuarial gains — — (70 ) (70 ) Tax effects 1,539 — 320 1,859 Net current-period other comprehensive income (2,721 ) (482 ) (3,203 ) Balance at September 30, 2014 $ 4,269 $ — $ 4,269 Nine Months Ended September 30, 2015 Securities Available for Sale Securities Held to Maturity Defined Benefit Pension Plan Total (In thousands) Balance at December 31, 2014 $ 3,392 $ — $ (815 ) $ 2,577 Other comprehensive loss before reclassification (5,139 ) — — (5,139 ) Realized gains reclassified (1,819 ) — — (1,819 ) Amortization of actuarial gains — — 83 83 Unrealized gains on securities reclassified as held to maturity (666 ) 666 — — Amortization of amounts previously recorded upon transfer to held-to-maturity from available-for-sale — (35 ) — (35 ) Tax effects 2,691 (252 ) (30 ) 2,409 Net current-period other comprehensive income (4,933 ) 379 53 (4,501 ) Balance at September 30, 2015 $ (1,541 ) $ 379 $ (762 ) $ (1,924 ) Nine Months Ended September 30, 2014 Securities Available for Sale Securities Held to Maturity Defined Benefit Pension Plan Total (In thousands) Balance at December 31, 2013 $ 1,983 $ — $ 482 $ 2,465 Other comprehensive income (loss) before reclassification 5,846 — (732 ) 5,114 Realized gains reclassified (2,081 ) — — (2,081 ) Amortization of actuarial gains — — (70 ) (70 ) Tax effects (1,479 ) — 320 (1,159 ) Net current-period other comprehensive income 2,286 — (482 ) 1,804 Balance at September 30, 2014 $ 4,269 $ — $ — $ 4,269

Stockholders' Equity (Tables)

Stockholders' Equity (Tables)	9 Months Ended
	Sep. 30, 2015
Equity [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 September 30, 2015 and December 31, 2014 are presented below. Actual Minimum Capital Requirement Minimum To Be Well Capitalized Amount Ratio Amount Ratio Amount Ratio (Dollars in thousands) Blue Hills Bancorp, Inc.: September 30, 2015 Total capital (to risk weighted assets) $ 409,777 26.9 % $ 121,898 8.0 % $ 152,372 10.0 % Tier 1 capital (to risk weighted assets) 394,695 25.9 91,423 6.0 121,898 8.0 Common equity Tier 1(to risk weighted assets) 394,695 25.9 68,568 4.5 99,042 6.5 Tier 1 capital (to average assets) 394,695 21.3 74,302 4.0 92,878 5.0 December 31, 2014 Total capital (to risk weighted assets) $ 409,545 32.6 % $ 100,513 8.0 % N/A N/A Tier 1 capital (to risk weighted assets) 395,615 31.5 50,527 4.0 N/A N/A Common equity Tier 1(to risk weighted assets) N/A N/A N/A N/A N/A N/A Tier 1 capital (to average assets) 395,615 23.3 67,820 4.0 N/A N/A Blue Hills Bank: September 30, 2015 Total capital (to risk weighted assets) $ 292,580 19.2 % $ 121,843 8.0 % $ 152,304 10.0 % Tier 1 capital (to risk weighted assets) 277,498 18.2 91,383 6.0 121,843 8.0 Common equity Tier 1(to risk weighted assets) 277,498 18.2 68,537 4.5 98,998 6.5 Tier 1 capital (to average assets) 277,498 15.0 74,083 4.0 92,603 5.0 December 31, 2014 Total capital (to risk weighted assets) $ 283,443 22.7 % $ 99,973 8.0 % $ 124,966 10.0 % Tier 1 capital (to risk weighted assets) 269,513 21.6 49,987 4.0 74,980 6.0 Common equity Tier 1(to risk weighted assets) N/A N/A N/A N/A N/A N/A Tier 1 capital (to average assets) 269,513 15.9 67,707 4.0 84,634 5.0

Employee Stock Ownership Plan (

Employee Stock Ownership Plan (Tables)	9 Months Ended
	Sep. 30, 2015
Compensation and Retirement Disclosure [Abstract]
Employee Stock Ownership Plan (ESOP) Disclosures	Shares held by the ESOP include the following: September 30, 2015 Allocated 75,912 Committed to be allocated 56,778 Unallocated 2,144,655 2,277,345

Earnings Per Common Share (Tabl

Earnings Per Common Share (Tables)	9 Months Ended
	Sep. 30, 2015
Earnings Per Share [Abstract]
Schedule of Earnings Per Share, Basic and Diluted	Three Months Ended Nine Months Ended September 30, 2015 September 30, 2015 (In thousands, except share amounts) Net income applicable to common stock $ 1,810 $ 4,815 Average number of common shares outstanding 28,337,603 28,423,110 Less: Average unallocated ESOP shares (2,154,222 ) (2,173,045 ) Average number of common shares outstanding used to calculate basic and diluted earnings per common share 26,183,381 26,250,065 Earnings per common share: Basic $ 0.07 $ 0.18 Diluted $ 0.07 $ 0.18

Basis of Presentation and Con31

Basis of Presentation and Consolidation (Details) - USD ($)	Jul. 21, 2014	Jul. 31, 2014	Sep. 30, 2015	Sep. 30, 2014
Subsidiary or Equity Method Investee [Line Items]
New shares issued during period (shares)	27,772,500
Shares issued (in dollars per share)	$ 10
Net proceeds from issuance of common stock	$ 277,725,000		$ 0	$ 274,160,000
Employee stock ownership plan, shares	2,277,345
Employee stock ownership plan, value	$ 22,773,450
Blue Hills Bank Foundation
Subsidiary or Equity Method Investee [Line Items]
New shares issued during period (shares)	694,313
Capital contribution to affiliate	$ 7,000,000
Cash payment to affiliate		$ 57,000
1-4 Family Residential
Subsidiary or Equity Method Investee [Line Items]
Origination covenants, maximum loan-to-value ratio			80.00%

Securities Available for Sale -

Securities Available for Sale - Available-for-sale Securities (Details) - USD ($) $ in Thousands	Sep. 30, 2015	Dec. 31, 2014
Debt securities:
Amortized Cost	$ 185,384	$ 370,010
Gross Unrealized Gains	1,749	3,943
Gross Unrealized Losses	(2,175)	(804)
Fair Value	184,958	373,149
Marketable equity securities:
Amortized Cost	48,672	41,172
Gross Unrealized Gains	317	2,207
Gross Unrealized Losses	(2,250)	(81)
Fair Value	46,739	43,298
Available-for-sale securities:
Amortized Cost	234,056	411,182
Gross Unrealized Gains	2,066	6,150
Gross Unrealized Losses	(4,425)	(885)
Fair Value	231,697	416,447
U.S. Treasury
Debt securities:
Amortized Cost		13,037
Gross Unrealized Gains		182
Gross Unrealized Losses		0
Fair Value		13,219
Government-sponsored enterprises
Debt securities:
Amortized Cost		26,335
Gross Unrealized Gains		131
Gross Unrealized Losses		(29)
Fair Value		26,437
Government-sponsored mortgage-backed and collateralized mortgage obligations
Debt securities:
Amortized Cost		160,091
Gross Unrealized Gains		756
Gross Unrealized Losses		(294)
Fair Value		160,553
Privately issued commercial mortgage- backed securities
Debt securities:
Amortized Cost	14,291	22,100
Gross Unrealized Gains	4	30
Gross Unrealized Losses	(124)	(201)
Fair Value	14,171	21,929
SBA asset-backed securities
Debt securities:
Amortized Cost		27,765
Gross Unrealized Gains		308
Gross Unrealized Losses		(27)
Fair Value		28,046
Other asset-backed securities
Debt securities:
Amortized Cost	10,059	16,235
Gross Unrealized Gains	29	0
Gross Unrealized Losses	(69)	(43)
Fair Value	10,019	16,192
Total mortgage- and other asset-backed securities
Debt securities:
Amortized Cost	24,350	66,100
Gross Unrealized Gains	33	338
Gross Unrealized Losses	(193)	(271)
Fair Value	24,190	66,167
State and political
Debt securities:
Amortized Cost	16,098	15,619
Gross Unrealized Gains	398	567
Gross Unrealized Losses	(25)	(3)
Fair Value	16,471	16,183
Global Equity
Marketable equity securities:
Amortized Cost	5,000	5,000
Gross Unrealized Gains	188	623
Gross Unrealized Losses	0	0
Fair Value	5,188	5,623
Domestic community
Marketable equity securities:
Amortized Cost	3,216	3,216
Gross Unrealized Gains	102	86
Gross Unrealized Losses	(9)	(5)
Fair Value	3,309	3,297
Global asset allocation
Marketable equity securities:
Amortized Cost	40,456	32,956
Gross Unrealized Gains	27	1,498
Gross Unrealized Losses	(2,241)	(76)
Fair Value	38,242	34,378
Other Corporate | Corporate debt securities
Debt securities:
Amortized Cost	85,996	51,281
Gross Unrealized Gains	550	946
Gross Unrealized Losses	(1,674)	(174)
Fair Value	84,872	52,053
Industrials | Corporate debt securities
Debt securities:
Amortized Cost	54,776	34,408
Gross Unrealized Gains	488	681
Gross Unrealized Losses	(845)	(54)
Fair Value	54,419	35,035
Utilities | Corporate debt securities
Debt securities:
Amortized Cost	31,220	16,873
Gross Unrealized Gains	62	265
Gross Unrealized Losses	(829)	(120)
Fair Value	30,453	17,018
Financial Services | Corporate debt securities
Debt securities:
Amortized Cost	58,940	37,547
Gross Unrealized Gains	768	1,023
Gross Unrealized Losses	(283)	(33)
Fair Value	59,425	38,537
Banks | Corporate debt securities
Debt securities:
Amortized Cost	21,289	12,364
Gross Unrealized Gains	202	531
Gross Unrealized Losses	(64)	(6)
Fair Value	21,427	12,889
Diversified Financials | Corporate debt securities
Debt securities:
Amortized Cost	22,358	15,796
Gross Unrealized Gains	527	354
Gross Unrealized Losses	(46)	(18)
Fair Value	22,839	16,132
Insurance and REITs | Corporate debt securities
Debt securities:
Amortized Cost	15,293	9,387
Gross Unrealized Gains	39	138
Gross Unrealized Losses	(173)	(9)
Fair Value	$ 15,159	$ 9,516

Securities Available for Sale33

Securities Available for Sale - Held-to-maturity Securities (Details) - USD ($) $ in Thousands	Sep. 30, 2015	Dec. 31, 2014
Schedule of Held-to-maturity Securities [Line Items]
Amortized Cost	$ 197,632	$ 0
Gross Unrealized Gains	923
Gross Unrealized Losses	(13)
Fair Value	198,542
U.S. Treasury
Schedule of Held-to-maturity Securities [Line Items]
Amortized Cost	646
Gross Unrealized Gains	1
Gross Unrealized Losses	0
Fair Value	647
Government-sponsored enterprises
Schedule of Held-to-maturity Securities [Line Items]
Amortized Cost	29,285
Gross Unrealized Gains	116
Gross Unrealized Losses	0
Fair Value	29,401
Government-sponsored mortgage-backed and collateralized mortgage obligations
Schedule of Held-to-maturity Securities [Line Items]
Amortized Cost	151,357
Gross Unrealized Gains	748
Gross Unrealized Losses	(13)
Fair Value	152,092
SBA asset-backed securities
Schedule of Held-to-maturity Securities [Line Items]
Amortized Cost	16,344
Gross Unrealized Gains	58
Gross Unrealized Losses	0
Fair Value	$ 16,402

Securities Available for Sale34

Securities Available for Sale - Schedule of Contractual Maturities of Securities (Details) - USD ($) $ in Thousands	Sep. 30, 2015	Dec. 31, 2014
Available-for-sale Securities, Amortized Cost Basis [Abstract]
Within 1 year, Available for Sale, Amortized Cost	$ 4,223
After 1 year through 5 years, Available for Sale, Amortized Cost	89,131
After 5 years through 10 years, Available for Sale, Amortized Cost	59,079
After 10 years, Available for Sale, Amortized Cost	8,601
Single Maturity Date, Available for Sale, Amortized Cost	161,034
Mortgage- and asset-backed securities and collateralized mortgage obligations - Amortized Basis	24,350
Amortized Cost	185,384	$ 370,010
Available-for-sale Securities, Debt Maturities, Fair Value, Fiscal Year Maturity [Abstract]
Within 1 year, Available for Sale, Fair Value	4,235
After 1 year through 5 years, Available for Sale, Fair Value	89,790
After 5 years through 10 years, Available for Sale, Fair Value	58,052
After 10 years, Available for Sale, Fair Value	8,691
Single Maturity Date, Available for Sale, Fair Value	160,768
Mortgage- and asset-backed securities and collateralized mortgage obligations - Fair Value	24,190
Available-for-sale securities, total debt securities	184,958	373,149
Held-to-maturity Securities, Debt Maturities, Single Maturity Date, Amortized Cost Basis [Abstract]
Within 1 year, Held to Maturity, Amortized Cost	5,060
After 1 year through 5 years, Held to Maturity, Amortized Cost	15,839
After 5 years through 10 years, Held to Maturity, Amortized Cost	9,032
After 10 years, Held to Maturity, Amortized Cost	0
Single Maturity Date, Held to Maturity, Amortized Cost	29,931
Mortgage- and asset-backed securities and collateralized mortgage obligations - Amortized Basis	167,701
Amortized Cost	197,632	$ 0
Held-to-maturity Securities, Debt Maturities, Single Maturity Date, Fair Value [Abstract]
Within 1 year, Held to Maturity, Fair Value	5,062
After 1 year through 5 years, Held to Maturity, Fair Value	15,881
After 5 years through 10 years, Held to Maturity, Fair Value	9,105
After 10 years, Held to Maturity, Fair Value	0
Single Maturity Date, Held to Maturity, Fair Value	30,048
Mortgage- and asset-backed securities and collateralized mortgage obligations - Fair Value	168,494
Held-to-maturity securities, total debt securities	$ 198,542

Securities Available for Sale35

Securities Available for Sale - Available-for-sale Securities Unrealized Loss (Details) - USD ($) $ in Thousands	Sep. 30, 2015	Dec. 31, 2014
Available-for-sale Securities, Continuous Unrealized Loss Position, Aggregate Loss [Abstract]
Gross Unrealized Losses - Less than twelve months	$ (4,127)	$ (627)
Gross Unrealized Losses - More than twelve months	(298)	(258)
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value [Abstract]
Fair Value - Less than twelve months	129,149	171,067
Fair Value - More than twelve months	9,264	18,726
Total debt securities
Available-for-sale Securities, Continuous Unrealized Loss Position, Aggregate Loss [Abstract]
Gross Unrealized Losses - Less than twelve months	(1,886)	(551)
Gross Unrealized Losses - More than twelve months	(289)	(253)
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value [Abstract]
Fair Value - Less than twelve months	91,432	164,010
Fair Value - More than twelve months	8,807	18,264
Government-sponsored enterprises
Available-for-sale Securities, Continuous Unrealized Loss Position, Aggregate Loss [Abstract]
Gross Unrealized Losses - Less than twelve months		(12)
Gross Unrealized Losses - More than twelve months		(17)
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value [Abstract]
Fair Value - Less than twelve months		5,932
Fair Value - More than twelve months		1,080
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		(190)
Gross Unrealized Losses - More than twelve months		(104)
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value [Abstract]
Fair Value - Less than twelve months		93,364
Fair Value - More than twelve months		8,425
Privately issued commercial mortgage- backed securities
Available-for-sale Securities, Continuous Unrealized Loss Position, Aggregate Loss [Abstract]
Gross Unrealized Losses - Less than twelve months	(32)	(69)
Gross Unrealized Losses - More than twelve months	(92)	(132)
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value [Abstract]
Fair Value - Less than twelve months	4,015	9,412
Fair Value - More than twelve months	7,941	8,759
SBA asset-backed securities
Available-for-sale Securities, Continuous Unrealized Loss Position, Aggregate Loss [Abstract]
Gross Unrealized Losses - Less than twelve months		(27)
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		5,529
Fair Value - More than twelve months		0
Other asset-backed securities
Available-for-sale Securities, Continuous Unrealized Loss Position, Aggregate Loss [Abstract]
Gross Unrealized Losses - Less than twelve months	(69)	(43)
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	5,001	16,192
Fair Value - More than twelve months	0	0
Total mortgage- and other asset-backed securities
Available-for-sale Securities, Continuous Unrealized Loss Position, Aggregate Loss [Abstract]
Gross Unrealized Losses - Less than twelve months	(101)	(139)
Gross Unrealized Losses - More than twelve months	(92)	(132)
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value [Abstract]
Fair Value - Less than twelve months	9,016	31,133
Fair Value - More than twelve months	7,941	8,759
State and political
Available-for-sale Securities, Continuous Unrealized Loss Position, Aggregate Loss [Abstract]
Gross Unrealized Losses - Less than twelve months	(25)	$ (3)
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	3,362	$ 1,955
Fair Value - More than twelve months	0	0
Total marketable equity securities
Available-for-sale Securities, Continuous Unrealized Loss Position, Aggregate Loss [Abstract]
Gross Unrealized Losses - Less than twelve months	(2,241)	(76)
Gross Unrealized Losses - More than twelve months	(9)	(5)
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value [Abstract]
Fair Value - Less than twelve months	37,717	7,057
Fair Value - More than twelve months	457	462
Domestic community
Available-for-sale Securities, Continuous Unrealized Loss Position, Aggregate Loss [Abstract]
Gross Unrealized Losses - Less than twelve months	0	0
Gross Unrealized Losses - More than twelve months	(9)	(5)
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value [Abstract]
Fair Value - Less than twelve months	0	0
Fair Value - More than twelve months	457	462
Global asset allocation
Available-for-sale Securities, Continuous Unrealized Loss Position, Aggregate Loss [Abstract]
Gross Unrealized Losses - Less than twelve months	(2,241)
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	37,717
Fair Value - More than twelve months	0
Diversified bonds
Available-for-sale Securities, Continuous Unrealized Loss Position, Aggregate Loss [Abstract]
Gross Unrealized Losses - Less than twelve months		(76)
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		7,057
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	(1,477)	(174)
Gross Unrealized Losses - More than twelve months	(197)	0
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value [Abstract]
Fair Value - Less than twelve months	52,159	16,866
Fair Value - More than twelve months	866	0
Industrials | Corporate debt securities
Available-for-sale Securities, Continuous Unrealized Loss Position, Aggregate Loss [Abstract]
Gross Unrealized Losses - Less than twelve months	(845)	(54)
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	28,693	9,575
Fair Value - More than twelve months	0	0
Utilities | Corporate debt securities
Available-for-sale Securities, Continuous Unrealized Loss Position, Aggregate Loss [Abstract]
Gross Unrealized Losses - Less than twelve months	(632)	(120)
Gross Unrealized Losses - More than twelve months	(197)	0
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value [Abstract]
Fair Value - Less than twelve months	23,466	7,291
Fair Value - More than twelve months	866	0
Financial Services | Corporate debt securities
Available-for-sale Securities, Continuous Unrealized Loss Position, Aggregate Loss [Abstract]
Gross Unrealized Losses - Less than twelve months	(283)	(33)
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	26,895	14,760
Fair Value - More than twelve months	0	0
Banks | Corporate debt securities
Available-for-sale Securities, Continuous Unrealized Loss Position, Aggregate Loss [Abstract]
Gross Unrealized Losses - Less than twelve months	(64)	(6)
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	12,228	2,907
Fair Value - More than twelve months	0	0
Diversified Financials | Corporate debt securities
Available-for-sale Securities, Continuous Unrealized Loss Position, Aggregate Loss [Abstract]
Gross Unrealized Losses - Less than twelve months	(46)	(18)
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	3,562	7,676
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	(173)	(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	11,105	4,177
Fair Value - More than twelve months	$ 0	$ 0

Securities Available for Sale36

Securities Available for Sale - Held-to-maturity Securities Unrealized Loss (Details) $ in Thousands	9 Months Ended
	Sep. 30, 2015USD ($)
Held-to-maturity Securities, Continuous Unrealized Loss Position, Aggregate Loss [Abstract]
Gross Unrealized Losses - Less than twelve months	$ (13)
Gross Unrealized Losses - More than twelve months	0
Held-to-maturity Securities, Continuous Unrealized Loss Position, Fair Value [Abstract]
Fair Value - Less than twelve months	4,454
Fair Value - More than twelve months	0
U.S. Treasury
Held-to-maturity Securities, Continuous Unrealized Loss Position, Aggregate Loss [Abstract]
Gross Unrealized Losses - Less than twelve months	0
Gross Unrealized Losses - More than twelve months	0
Held-to-maturity Securities, Continuous Unrealized Loss Position, Fair Value [Abstract]
Fair Value - Less than twelve months	0
Fair Value - More than twelve months	0
Government-sponsored enterprises
Held-to-maturity Securities, Continuous Unrealized Loss Position, Aggregate Loss [Abstract]
Gross Unrealized Losses - Less than twelve months	0
Gross Unrealized Losses - More than twelve months	0
Held-to-maturity Securities, Continuous Unrealized Loss Position, Fair Value [Abstract]
Fair Value - Less than twelve months	0
Fair Value - More than twelve months	0
Government-sponsored mortgage-backed and collateralized mortgage obligations
Held-to-maturity Securities, Continuous Unrealized Loss Position, Aggregate Loss [Abstract]
Gross Unrealized Losses - Less than twelve months	(13)
Gross Unrealized Losses - More than twelve months	0
Held-to-maturity Securities, Continuous Unrealized Loss Position, Fair Value [Abstract]
Fair Value - Less than twelve months	4,454
Fair Value - More than twelve months	0
SBA asset-backed securities
Held-to-maturity Securities, Continuous Unrealized Loss Position, Aggregate Loss [Abstract]
Gross Unrealized Losses - Less than twelve months	0
Gross Unrealized Losses - More than twelve months	0
Held-to-maturity Securities, Continuous Unrealized Loss Position, Fair Value [Abstract]
Fair Value - Less than twelve months	0
Fair Value - More than twelve months	$ 0

Securities Available for Sale37

Securities Available for Sale - Narrative (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014	Dec. 31, 2014
Schedule of Available-for-sale Securities [Line Items]
Available-for-sale securities, transferred security, carrying value	$ 196,300		$ 196,300
Available-for-sale securities, transferred security, unrealized gain	666
Holding gain	$ 631	$ 0	631	$ 0
Proceeds from sale of available-for-sale securities			91,197	171,254
Available-for-sale securities, gross realized gains			1,900	2,600
Available-for-sale securities, gross realized losses			$ 35	$ 515
Depreciation, percentage of amortized cost basis	2.10%		2.10%
Gross Unrealized Losses - More than twelve months	$ 298		$ 298		$ 258
Mutual Funds
Schedule of Available-for-sale Securities [Line Items]
Depreciation, percentage of amortized cost basis	5.60%		5.60%
Gross Unrealized Losses - More than twelve months	$ 2,250		$ 2,250

Loans and The Allowance for L38

Loans and The Allowance for Loan Losses - Summary of Loan balances (Details) - USD ($) $ in Thousands	Sep. 30, 2015	Dec. 31, 2014
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	$ 1,366,647	$ 1,147,037
Allowance for loan losses	(15,082)	(12,973)
Discount and fair value adjustments on purchased loans	(2,272)	(3,850)
Deferred loan costs and fees, net	2,827	2,700
Loans, net	1,352,120	1,132,914
Real Estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	1,166,523	963,436
1-4 Family Residential
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	539,506	460,273
Home Equity
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	73,432	61,750
Commercial Real Estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	499,057	387,807
Construction
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	54,528	53,606
Commercial Business
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	164,164	151,823
Consumer
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	$ 35,960	$ 31,778

Loans and The Allowance for L39

Loans and The Allowance for Loan Losses - Activity in Allowance for Loan Losses (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Loans and Leases Receivable, Beginning Allowance	$ 13,777	$ 11,292	$ 12,973	$ 9,671
Provision for loan losses	1,318	1,438	2,141	3,111
Loans charged-off	(13)	(9)	(32)	(61)
Recoveries	0	0	0	0
Loans and Leases Receivable, Ending Allowance	15,082	12,721	15,082	12,721
1-4 Family Residential
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Loans and Leases Receivable, Beginning Allowance	3,407	3,088	3,222	2,835
Provision for loan losses	153	341	338	613
Loans charged-off	0	0	0	(19)
Recoveries	0	0	0	0
Loans and Leases Receivable, Ending Allowance	3,560	3,429	3,560	3,429
Home Equity
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Loans and Leases Receivable, Beginning Allowance	419	305	340	247
Provision for loan losses	126	45	205	103
Loans charged-off	0	0	0	0
Recoveries	0	0	0	0
Loans and Leases Receivable, Ending Allowance	545	350	545	350
Commercial Real Estate
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Loans and Leases Receivable, Beginning Allowance	4,568	3,242	3,551	2,608
Provision for loan losses	652	398	1,669	1,032
Loans charged-off	0	0	0	0
Recoveries	0	0	0	0
Loans and Leases Receivable, Ending Allowance	5,220	3,640	5,220	3,640
Construction
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Loans and Leases Receivable, Beginning Allowance	1,024	699	1,056	303
Provision for loan losses	(302)	256	(334)	652
Loans charged-off	0	0	0	0
Recoveries	0	0	0	0
Loans and Leases Receivable, Ending Allowance	722	955	722	955
Commercial Business
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Loans and Leases Receivable, Beginning Allowance	2,991	2,655	3,410	2,416
Provision for loan losses	580	345	161	584
Loans charged-off	0	0	0	0
Recoveries	0	0	0	0
Loans and Leases Receivable, Ending Allowance	3,571	3,000	3,571	3,000
Consumer
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Loans and Leases Receivable, Beginning Allowance	680	645	736	574
Provision for loan losses	44	53	7	157
Loans charged-off	(13)	(9)	(32)	(42)
Recoveries	0	0	0	0
Loans and Leases Receivable, Ending Allowance	711	689	711	689
Unallocated
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Loans and Leases Receivable, Beginning Allowance	688	658	658	688
Provision for loan losses	65	0	95	(30)
Loans charged-off	0	0	0	0
Recoveries	0	0	0	0
Loans and Leases Receivable, Ending Allowance	$ 753	$ 658	$ 753	$ 658

Loans and The Allowance for L40

Loans and The Allowance for Loan Losses - Additional Activity in Allowance for Loan Losses (Details) - USD ($) $ in Thousands	Sep. 30, 2015	Jun. 30, 2015	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Dec. 31, 2013
Financing Receivable, Allowance for Credit Losses [Line Items]
Allowance related to impaired loans	$ 0		$ 0
Allowance related to non-impaired loans	15,082		12,973
Total allowance for loan losses	15,082	$ 13,777	12,973	$ 12,721	$ 11,292	$ 9,671
Impaired loans	5,519		5,024
Non-impaired loans	1,361,128		1,142,013
Total loans	1,366,647		1,147,037
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	3,560		3,222
Total allowance for loan losses	3,560	3,407	3,222	3,429	3,088	2,835
Impaired loans	4,636		4,419
Non-impaired loans	534,870		455,854
Total loans	539,506		460,273
Home Equity
Financing Receivable, Allowance for Credit Losses [Line Items]
Allowance related to impaired loans	0		0
Allowance related to non-impaired loans	545		340
Total allowance for loan losses	545	419	340	350	305	247
Impaired loans	733		578
Non-impaired loans	72,699		61,172
Total loans	73,432		61,750
Commercial Real Estate
Financing Receivable, Allowance for Credit Losses [Line Items]
Allowance related to impaired loans	0		0
Allowance related to non-impaired loans	5,220		3,551
Total allowance for loan losses	5,220	4,568	3,551	3,640	3,242	2,608
Impaired loans	0		0
Non-impaired loans	499,057		387,807
Total loans	499,057		387,807
Construction
Financing Receivable, Allowance for Credit Losses [Line Items]
Allowance related to impaired loans	0		0
Allowance related to non-impaired loans	722		1,056
Total allowance for loan losses	722	1,024	1,056	955	699	303
Impaired loans	0		0
Non-impaired loans	54,528		53,606
Total loans	54,528		53,606
Commercial Business
Financing Receivable, Allowance for Credit Losses [Line Items]
Allowance related to impaired loans	0		0
Allowance related to non-impaired loans	3,571		3,410
Total allowance for loan losses	3,571	2,991	3,410	3,000	2,655	2,416
Impaired loans	0		0
Non-impaired loans	164,164		151,823
Total loans	164,164		151,823
Consumer
Financing Receivable, Allowance for Credit Losses [Line Items]
Allowance related to impaired loans	0		0
Allowance related to non-impaired loans	711		736
Total allowance for loan losses	711	680	736	689	645	574
Impaired loans	150		27
Non-impaired loans	35,810		31,751
Total loans	35,960		31,778
Unallocated
Financing Receivable, Allowance for Credit Losses [Line Items]
Allowance related to impaired loans	0		0
Allowance related to non-impaired loans	753		658
Total allowance for loan losses	753	$ 688	658	$ 658	$ 658	$ 688
Impaired loans	0		0
Non-impaired loans	0		0
Total loans	$ 0		$ 0

Loans and The Allowance for L41

Loans and The Allowance for Loan Losses - Summary of Past Due and Non-accrual loans, by class (Details) - USD ($) $ in Thousands	Sep. 30, 2015	Dec. 31, 2014
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	$ 4,498	$ 6,406
Loans on Non-accrual	4,999	4,481
1-4 Family Residential
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	2,872	5,029
Loans on Non-accrual	4,116	3,876
Home Equity
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	1,423	1,155
Loans on Non-accrual	733	578
Commercial Business
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	11
Loans on Non-accrual	0
Consumer
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	192	222
Loans on Non-accrual	150	27
30-59 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	1,435	4,034
30-59 Days Past Due | 1-4 Family Residential
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	922	3,137
30-59 Days Past Due | Home Equity
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	502	680
30-59 Days Past Due | Commercial Business
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	11
30-59 Days Past Due | Consumer
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	0	217
60-89 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	1,629	522
60-89 Days Past Due | 1-4 Family Residential
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	1,238	522
60-89 Days Past Due | Home Equity
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	309	0
60-89 Days Past Due | Commercial Business
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	0
60-89 Days Past Due | Consumer
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	82	0
Past Due 90 Days or More
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	1,434	1,850
Past Due 90 Days or More | 1-4 Family Residential
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	712	1,370
Past Due 90 Days or More | Home Equity
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	612	475
Past Due 90 Days or More | Commercial Business
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	0
Past Due 90 Days or More | Consumer
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	$ 110	$ 5

Loans and The Allowance for L42

Loans and The Allowance for Loan Losses - Summary of Impaired Loans (Details) - USD ($) $ in Thousands	Sep. 30, 2015	Dec. 31, 2014
Financing Receivable, Impaired [Line Items]
Recorded Investment	$ 5,519	$ 5,024
Unpaid Principal Balance	6,544	6,047
Related Allowance	0	0
1-4 Family Residential
Financing Receivable, Impaired [Line Items]
Recorded Investment	4,636	4,419
Unpaid Principal Balance	5,426	5,211
Related Allowance	0	0
Home Equity
Financing Receivable, Impaired [Line Items]
Recorded Investment	733	578
Unpaid Principal Balance	965	804
Related Allowance	0	0
Consumer
Financing Receivable, Impaired [Line Items]
Recorded Investment	150	27
Unpaid Principal Balance	153	32
Related Allowance	$ 0	$ 0

Loans and The Allowance for L43

Loans and The Allowance for Loan Losses - Summary of Average Recorded Investments and Interest Income of Impaired Loans (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Financing Receivable, Impaired [Line Items]
Average Recorded Investment	$ 5,371	$ 4,953	$ 5,272	$ 4,215
Interest Income Recognized	60	54	219	170
1-4 Family Residential
Financing Receivable, Impaired [Line Items]
Average Recorded Investment	4,559	4,248	4,558	3,903
Interest Income Recognized	53	49	196	153
Home Equity
Financing Receivable, Impaired [Line Items]
Average Recorded Investment	717	658	652	289
Interest Income Recognized	6	4	20	14
Consumer
Financing Receivable, Impaired [Line Items]
Average Recorded Investment	95	47	62	23
Interest Income Recognized	$ 1	$ 1	$ 3	$ 3

Loans and The Allowance for L44

Loans and The Allowance for Loan Losses - Summary of Loan by Risk Rating (Details) - USD ($) $ in Thousands	Sep. 30, 2015	Dec. 31, 2014
Financing Receivable, Recorded Investment [Line Items]
Total loans	$ 1,366,647	$ 1,147,037
1-4 Family Residential
Financing Receivable, Recorded Investment [Line Items]
Total loans	539,506	460,273
Home Equity
Financing Receivable, Recorded Investment [Line Items]
Total loans	73,432	61,750
Commercial Real Estate
Financing Receivable, Recorded Investment [Line Items]
Total loans	499,057	387,807
Construction
Financing Receivable, Recorded Investment [Line Items]
Total loans	54,528	53,606
Commercial Business
Financing Receivable, Recorded Investment [Line Items]
Total loans	164,164	151,823
Consumer
Financing Receivable, Recorded Investment [Line Items]
Total loans	35,960	31,778
Loans rated 1 - 6
Financing Receivable, Recorded Investment [Line Items]
Total loans	713,690	596,076
Loans rated 1 - 6 | 1-4 Family Residential
Financing Receivable, Recorded Investment [Line Items]
Total loans	2,050	3,381
Loans rated 1 - 6 | Home Equity
Financing Receivable, Recorded Investment [Line Items]
Total loans	468	473
Loans rated 1 - 6 | Commercial Real Estate
Financing Receivable, Recorded Investment [Line Items]
Total loans	493,477	387,651
Loans rated 1 - 6 | Construction
Financing Receivable, Recorded Investment [Line Items]
Total loans	54,528	53,606
Loans rated 1 - 6 | Commercial Business
Financing Receivable, Recorded Investment [Line Items]
Total loans	163,162	150,960
Loans rated 1 - 6 | Consumer
Financing Receivable, Recorded Investment [Line Items]
Total loans	5	5
Loans rated 7
Financing Receivable, Recorded Investment [Line Items]
Total loans	11,247	4,966
Loans rated 7 | 1-4 Family Residential
Financing Receivable, Recorded Investment [Line Items]
Total loans	4,253	3,095
Loans rated 7 | Home Equity
Financing Receivable, Recorded Investment [Line Items]
Total loans	863	852
Loans rated 7 | Commercial Real Estate
Financing Receivable, Recorded Investment [Line Items]
Total loans	5,129	156
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	1,002	863
Loans rated 7 | Consumer
Financing Receivable, Recorded Investment [Line Items]
Total loans	0	0
Loans rated 8
Financing Receivable, Recorded Investment [Line Items]
Total loans	2,352	1,362
Loans rated 8 | 1-4 Family Residential
Financing Receivable, Recorded Investment [Line Items]
Total loans	1,604	1,331
Loans rated 8 | Home Equity
Financing Receivable, Recorded Investment [Line Items]
Total loans	144	0
Loans rated 8 | Commercial Real Estate
Financing Receivable, Recorded Investment [Line Items]
Total loans	451	0
Loans rated 8 | Construction
Financing Receivable, Recorded Investment [Line Items]
Total loans	0	0
Loans rated 8 | Commercial Business
Financing Receivable, Recorded Investment [Line Items]
Total loans	0	0
Loans rated 8 | Consumer
Financing Receivable, Recorded Investment [Line Items]
Total loans	153	31
Loans rated 9
Financing Receivable, Recorded Investment [Line Items]
Total loans	703	709
Loans rated 9 | 1-4 Family Residential
Financing Receivable, Recorded Investment [Line Items]
Total loans	703	709
Loans rated 9 | Home Equity
Financing Receivable, Recorded Investment [Line Items]
Total loans	0	0
Loans rated 9 | Commercial Real Estate
Financing Receivable, Recorded Investment [Line Items]
Total loans	0	0
Loans rated 9 | Construction
Financing Receivable, Recorded Investment [Line Items]
Total loans	0	0
Loans rated 9 | Commercial Business
Financing Receivable, Recorded Investment [Line Items]
Total loans	0	0
Loans rated 9 | Consumer
Financing Receivable, Recorded Investment [Line Items]
Total loans	0	0
Loans rated 10
Financing Receivable, Recorded Investment [Line Items]
Total loans	0	0
Loans rated 10 | 1-4 Family Residential
Financing Receivable, Recorded Investment [Line Items]
Total loans	0	0
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	638,655	543,924
Loans not rated | 1-4 Family Residential
Financing Receivable, Recorded Investment [Line Items]
Total loans	530,896	451,757
Loans not rated | Home Equity
Financing Receivable, Recorded Investment [Line Items]
Total loans	71,957	60,425
Loans not rated | Commercial Real Estate
Financing Receivable, Recorded Investment [Line Items]
Total loans	0	0
Loans not rated | Construction
Financing Receivable, Recorded Investment [Line Items]
Total loans	0	0
Loans not rated | Commercial Business
Financing Receivable, Recorded Investment [Line Items]
Total loans	0	0
Loans not rated | Consumer
Financing Receivable, Recorded Investment [Line Items]
Total loans	$ 35,802	$ 31,742

Loans and The Allowance for L45

Loans and The Allowance for Loan Losses - Narrative (Details)	3 Months Ended		9 Months Ended
	Sep. 30, 2015USD ($)loan	Sep. 30, 2014USD ($)loan	Sep. 30, 2015USD ($)loan	Sep. 30, 2014USD ($)loan
Financing Receivable, Modifications [Line Items]
Financing receivable, modification, recorded investment	$ 0	$ 0	$ 0	$ 0
Financing receivable, modifications, subsequent default, number of contracts | loan	1	0	1	0
1-4 Family Residential
Financing Receivable, Modifications [Line Items]
Number of contracts | loan			4
Pre-Modification Outstanding Recorded Investment			$ 946,000
Post-Modification Outstanding Recorded Investment			$ 984,000

Interest Rate Swap Agreements46

Interest Rate Swap Agreements (Details) - Not Designated as Hedging Instrument - USD ($) $ in Thousands	Sep. 30, 2015	Dec. 31, 2014
Derivatives, Fair Value [Line Items]
Derivative Gains, notional amount	$ 239,892	$ 211,586
Derivative Gains, fair value	9,742	5,454
Derivative Losses, notional amount	242,018	211,257
Derivative Losses, fair value	10,475	5,842
Interest Rate Swap
Derivatives, Fair Value [Line Items]
Derivative Gains, notional amount	231,513	202,970
Derivative Gains, fair value	9,730	5,446
Derivative Losses, notional amount	231,513	202,970
Derivative Losses, fair value	10,373	5,759
Other Contract
Derivatives, Fair Value [Line Items]
Derivative Gains, notional amount	8,379	8,616
Derivative Gains, fair value	12	8
Derivative Losses, notional amount	10,505	8,287
Derivative Losses, fair value	$ 102	$ 83

Deposits - Summary of Deposit B

Deposits - Summary of Deposit Balances (Details) - USD ($) $ in Thousands	Sep. 30, 2015	Dec. 31, 2014
Banking and Thrift [Abstract]
NOW and demand	$ 284,720	$ 245,117
Regular savings	288,597	303,834
Money market	341,588	280,139
Brokered money market	33,924	23,166
Total non-certificate accounts	948,829	852,256
Term certificates of $100,000 or more	155,026	142,569
Term certificates less than $100,000	155,398	159,186
Brokered term certificates	85,705	58,705
Total certificate accounts	396,129	360,460
Total deposits	$ 1,344,958	$ 1,212,716

Deposits - Schedule of Contract

Deposits - Schedule of Contractual Maturities (Details) - USD ($) $ in Thousands	Sep. 30, 2015	Dec. 31, 2014
Time Deposits, Fiscal Year Maturity [Abstract]
Amount - Within 1 year	$ 190,903
Amount - 1-2 years	87,040
Amount - 2-3 years	36,404
Amount - 3-4 years	32,623
Amount - 4 years and beyond	49,159
Total certificate accounts	$ 396,129	$ 360,460
Weighted Average Rate of Time Deposits [Abstract]
Weighted Average Rate - Within 1 year	0.62%
Weighted Average Rate - 1-2 years	1.09%
Weighted Average Rate - 2-3 years	1.29%
Weighted Average Rate - 3-4 years	1.79%
Weighted Average Rate - 4 years and beyond	1.97%
Weighted Average Rate	1.05%

Fair Value Measurements - Asset

Fair Value Measurements - Assets and Liabilities Measured at Fair Value on a Recurring Basis (Details) - USD ($) $ in Thousands	Sep. 30, 2015	Dec. 31, 2014
Assets
Debt securities	$ 184,958	$ 373,149
Marketable equity securities	46,739	43,298
Recurring
Assets
Debt securities	184,958	373,149
Marketable equity securities	46,739	43,298
Derivative assets	9,742	5,454
Total assets	241,439	421,901
Liabilities
Derivative liabilities	10,475	5,842
Recurring | Level 1
Assets
Debt securities	0	13,219
Marketable equity securities	46,739	43,298
Derivative assets	0	0
Total assets	46,739	56,517
Liabilities
Derivative liabilities	0	0
Recurring | Level 2
Assets
Debt securities	184,958	359,930
Marketable equity securities	0	0
Derivative assets	9,742	5,454
Total assets	194,700	365,384
Liabilities
Derivative liabilities	10,475	5,842
Recurring | Level 3
Assets
Debt securities	0	0
Marketable equity securities	0	0
Derivative assets	0	0
Total assets	0	0
Liabilities
Derivative liabilities	$ 0	$ 0

Fair Value Measurements - Ass50

Fair Value Measurements - Assets and Liabilities Measured at Fair Value on a Nonrecurring Basis (Details) - Nonrecurring - Level 3 $ in Thousands	3 Months Ended	9 Months Ended
	Sep. 30, 2014USD ($)	Sep. 30, 2014USD ($)	Dec. 31, 2014loan
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Number of impaired loans | loan			1
Impaired loans	$ 120	$ 120
Total Losses	$ 18	$ 18

Fair Value Measurements - Summa

Fair Value Measurements - Summary of Fair Value, Balance Sheet Grouping (Details) - USD ($) $ in Thousands	Sep. 30, 2015	Dec. 31, 2014
Financial assets:
Securities available for sale	$ 231,697	$ 416,447
Securities held to maturity	197,632	0
Estimate of Fair Value Measurement
Financial assets:
Cash and cash equivalents	20,980	60,146
Securities available for sale	231,697	416,447
Securities held to maturity	198,542
Federal Home Loan Bank stock	11,702	11,702
Loans and loans held for sale	1,347,827	1,132,024
Accrued interest receivable	5,174	4,433
Financial liabilities:
Deposits	1,347,227	1,214,251
Borrowings	160,900	76,074
Carrying Amount
Financial assets:
Cash and cash equivalents	20,980	60,146
Securities available for sale	231,697	416,447
Securities held to maturity	197,632
Federal Home Loan Bank stock	11,702	11,702
Loans and loans held for sale	1,373,543	1,147,505
Accrued interest receivable	5,174	4,433
Financial liabilities:
Deposits	1,344,958	1,212,716
Borrowings	160,000	75,000
Level 1
Financial assets:
Cash and cash equivalents	20,980	60,146
Securities available for sale	46,739	56,517
Securities held to maturity	647
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
Securities available for sale	184,958	359,930
Securities held to maturity	197,895
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	160,900	76,074
Level 3
Financial assets:
Cash and cash equivalents	0	0
Securities available for sale	0	0
Securities held to maturity	0
Federal Home Loan Bank stock	11,702	11,702
Loans and loans held for sale	1,347,827	1,132,024
Accrued interest receivable	5,174	4,433
Financial liabilities:
Deposits	1,347,227	1,214,251
Borrowings	0	0
Interest Rate Swap | Estimate of Fair Value Measurement
Financial liabilities:
Derivative assets	9,742	5,454
Derivative liabilities	10,475	5,842
Interest Rate Swap | Carrying Amount
Financial liabilities:
Derivative assets	9,742	5,454
Derivative liabilities	10,475	5,842
Interest Rate Swap | Level 1
Financial liabilities:
Derivative assets	0	0
Derivative liabilities	0	0
Interest Rate Swap | Level 2
Financial liabilities:
Derivative assets	9,742	5,454
Derivative liabilities	10,475	5,842
Interest Rate Swap | Level 3
Financial liabilities:
Derivative assets	0	0
Derivative liabilities	$ 0	$ 0

Comprehensive Income - Componen

Comprehensive Income - Components of Accumulated Other Comprehensive Income (Details) - USD ($) $ in Thousands	Sep. 30, 2015	Dec. 31, 2014
Accumulated Other Comprehensive Income (Loss) [Line Items]
Accumulated other comprehensive income	$ (1,924)	$ 2,577
Accumulated Defined Benefit Plans Adjustment, Net Unamortized Gain (Loss)
Accumulated Other Comprehensive Income (Loss) [Line Items]
Net unrealized actuarial gain (loss)	(1,275)	(1,358)
Tax effect	513	543
Accumulated other comprehensive income	(762)	(815)
Available-for-sale Securities | Accumulated Net Investment Gain (Loss)
Accumulated Other Comprehensive Income (Loss) [Line Items]
Net unrealized actuarial gain (loss)	(2,359)	5,265
Tax effect	818	(1,873)
Accumulated other comprehensive income	(1,541)	3,392
Held-to-maturity Securities | Accumulated Net Investment Gain (Loss)
Accumulated Other Comprehensive Income (Loss) [Line Items]
Net unrealized actuarial gain (loss)	631	0
Tax effect	(252)	0
Accumulated other comprehensive income	$ 379	$ 0

Comprehensive Income - Changes

Comprehensive Income - Changes in Accumulated Other Comprehensive Income (Loss) by Component (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning Balance			$ 2,577
Unrealized gains on securities reclassified as held to maturity	$ (666)	$ 0	(666)	$ 0
Other comprehensive income (loss)	(3,123)	(3,203)	(4,501)	1,804
Ending Balance	(1,924)		(1,924)
Defined Benefit Pension Plan
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning Balance	(781)	482	(815)	482
Other comprehensive income (loss) before reclassification	0	(732)	0	(732)
Realized gains reclassified	0	0	0	0
Amortization of actuarial losses	27	(70)	83	(70)
Tax effects	(8)	320	(30)	320
Other comprehensive income (loss)	19	(482)	53	(482)
Ending Balance	(762)	0	(762)	0
Accumulated Other Comprehensive Income
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning Balance	1,199	7,472	2,577	2,465
Other comprehensive income (loss) before reclassification	(4,508)	(4,643)	(5,139)	5,114
Realized gains reclassified	(234)	(349)	(1,819)	(2,081)
Amortization of actuarial losses	27	(70)	83	(70)
Unrealized gains on securities reclassified as held to maturity	0		0
Amortization of amounts previously recorded upon transfer to held-to-maturity from available-for-sale	(35)		(35)
Tax effects	1,627	1,859	2,409	(1,159)
Other comprehensive income (loss)	(3,123)	(3,203)	(4,501)	1,804
Ending Balance	(1,924)	4,269	(1,924)	4,269
Available-for-sale Securities | Accumulated Net Investment Gain (Loss)
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning Balance	1,980	6,990	3,392	1,983
Other comprehensive income (loss) before reclassification	(4,508)	(3,911)	(5,139)	5,846
Realized gains reclassified	(234)	(349)	(1,819)	(2,081)
Unrealized gains on securities reclassified as held to maturity	(666)		(666)
Amortization of amounts previously recorded upon transfer to held-to-maturity from available-for-sale	0		0
Tax effects	1,887	1,539	2,691	(1,479)
Other comprehensive income (loss)	(3,521)	(2,721)	(4,933)	2,286
Ending Balance	(1,541)	4,269	(1,541)	4,269
Held-to-maturity Securities | Accumulated Net Investment Gain (Loss)
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning Balance	0	0	0	0
Other comprehensive income (loss) before reclassification	0	0	0	0
Realized gains reclassified	0	0	0	0
Unrealized gains on securities reclassified as held to maturity	666		666
Amortization of amounts previously recorded upon transfer to held-to-maturity from available-for-sale	(35)		(35)
Tax effects	(252)	0	(252)	0
Other comprehensive income (loss)	379		379	0
Ending Balance	$ 379	$ 0	$ 379	$ 0

Stockholders' Equity (Details)

Stockholders' Equity (Details) - USD ($) $ in Thousands	Sep. 30, 2015	Dec. 31, 2014	Jul. 31, 2013	Jul. 30, 2013
Capital [Abstract]
Actual - Total Capital	$ 409,777	$ 409,545
Actual - Total Capital to Risk Weighted Assets Ratio (percentage)	26.90%	32.60%
Minimum Capital Requirement - Total Capital	$ 121,898	$ 100,513
Minimum Capital Requirement - Total Capital to Risk Weighted Assets (percentage)	8.00%	8.00%
Minimum to Be Well Capitalized - Total Capital	$ 152,372
Minimum to Be Well Capitalized - Total Capital to Risk Weighted Assets Ratio (percentage)	10.00%
Tier One Risk Based Capital [Abstract]
Actual - Tier 1 Capital to Risk Weighted Assets	$ 394,695	$ 395,615
Actual - Tier 1 Capital to Risk Weighted Assets Ratio (percentage)	25.90%	31.50%
Minimum Capital Requirement - Tier 1 Capital to Risk Weighted Assets	$ 91,423	$ 50,527
Minimum Capital Requirement - Tier 1 Capital to Risk Weighted Assets Ratio (percentage)	6.00%	4.00%	6.00%	4.00%
Minimum to Be Well Capitalized - Tier 1 Capital to Risk Weighted Assets	$ 121,898
Minimum to Be Well Capitalized - Tier 1 Capital to Risk Weighted Assets Ratio (percentage)	8.00%
Common Equity Risk Based Capital [Abstract]
Actual - Common Equity to Risk Weighted Assets	$ 394,695
Actual - Common Equity to Risk Weighted Assets (percentage)	25.90%
Minimum Capital Requirement - Common Equity to Risk Weighted Assets	$ 68,568
Minimum Capital Requirement - Common Equity to Risk Weighted Assets (percentage)	4.50%
Minimum to Be Well Capitalized - Common Equity to Risk Weighted Assets	$ 99,042
Minimum to Be Well Capitalized - Common Equity to Risk Weighted Assets (percentage)	6.50%
Tier One Leverage Capital [Abstract]
Actual - Tier 1 Capital to Average Assets	$ 394,695	$ 395,615
Actual - Tier 1 Capital to Average Assets Ratio (percentage)	21.30%	23.30%
Minimum Capital Requirement - Tier 1 Capital to Average Assets	$ 74,302	$ 67,820
Minimum Capital Requirement - Tier 1 Capital to Average Assets Ratio (percentage)	4.00%	4.00%	4.00%
Minimum to Be Well Capitalized - Tier 1 Capital to Average Assets	$ 92,878
Minimum to Be Well Capitalized - Tier 1 Capital to Average Assets Ratio (percentage)	5.00%
Blue Hills Bank
Capital [Abstract]
Actual - Total Capital	$ 292,580	$ 283,443
Actual - Total Capital to Risk Weighted Assets Ratio (percentage)	19.20%	22.70%
Minimum Capital Requirement - Total Capital	$ 121,843	$ 99,973
Minimum Capital Requirement - Total Capital to Risk Weighted Assets (percentage)	8.00%	8.00%
Minimum to Be Well Capitalized - Total Capital	$ 152,304	$ 124,966
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	$ 277,498	$ 269,513
Actual - Tier 1 Capital to Risk Weighted Assets Ratio (percentage)	18.20%	21.60%
Minimum Capital Requirement - Tier 1 Capital to Risk Weighted Assets	$ 91,383	$ 49,987
Minimum Capital Requirement - Tier 1 Capital to Risk Weighted Assets Ratio (percentage)	6.00%	4.00%
Minimum to Be Well Capitalized - Tier 1 Capital to Risk Weighted Assets	$ 121,843	$ 74,980
Minimum to Be Well Capitalized - Tier 1 Capital to Risk Weighted Assets Ratio (percentage)	8.00%	6.00%
Common Equity Risk Based Capital [Abstract]
Actual - Common Equity to Risk Weighted Assets	$ 277,498
Actual - Common Equity to Risk Weighted Assets (percentage)	18.20%
Minimum Capital Requirement - Common Equity to Risk Weighted Assets	$ 68,537
Minimum Capital Requirement - Common Equity to Risk Weighted Assets (percentage)	4.50%
Minimum to Be Well Capitalized - Common Equity to Risk Weighted Assets	$ 98,998
Minimum to Be Well Capitalized - Common Equity to Risk Weighted Assets (percentage)	6.50%
Tier One Leverage Capital [Abstract]
Actual - Tier 1 Capital to Average Assets	$ 277,498	$ 269,513
Actual - Tier 1 Capital to Average Assets Ratio (percentage)	15.00%	15.90%
Minimum Capital Requirement - Tier 1 Capital to Average Assets	$ 74,083	$ 67,707
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	$ 92,603	$ 84,634
Minimum to Be Well Capitalized - Tier 1 Capital to Average Assets Ratio (percentage)	5.00%	5.00%

Stockholders' Equity -Additiona

Stockholders' Equity -Additional Information (Details)	Sep. 30, 2015	Dec. 31, 2014	Jul. 31, 2013	Jul. 30, 2013
Equity [Abstract]
Tier one common capital to risk weighted assets			4.50%
Tier one risk based capital required for capital adequacy to risk weighted assets	6.00%	4.00%	6.00%	4.00%
Tier one leverage capital required for capital adequacy to average assets	4.00%	4.00%	4.00%
Tier one capital conservation buffer common equity capital to risk weighted assets (greater than)			2.50%

Employee Stock Ownership Plan56

Employee Stock Ownership Plan (Details)	Sep. 30, 2015shares
Compensation and Retirement Disclosure [Abstract]
Allocated	75,912
Committed to be allocated	56,778
Unallocated	2,144,655
Total	2,277,345

Employee Stock Ownership Plan A

Employee Stock Ownership Plan Additional information (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Compensation and Retirement Disclosure [Abstract]
ESOP, Number of shares committed to be released annually	75,912		75,912
Fair Value of unallocated shares	$ 29,700		$ 29,700
ESOP expense	$ 274	$ 488	$ 782	$ 488

Earnings Per Common Share (Deta

Earnings Per Common Share (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Earnings Per Share [Abstract]
Net income applicable to common stock	$ 1,810	$ (2,958)	$ 4,815	$ (2,928)
Average number of common shares outstanding	28,337,603		28,423,110
Less: Average unallocated ESOP shares	(2,154,222)		(2,173,045)
Average number of common shares outstanding used to calculate basic and diluted earnings per common share	26,183,381		26,250,065
Basic (dollars per share)	$ 0.07		$ 0.18
Diluted (dollars per share)	$ 0.07		$ 0.18

Subsequent Events (Details)

Subsequent Events (Details) - 2015 Equity Incentive Plan - USD ($) $ in Millions	Oct. 07, 2015	Sep. 30, 2015
Subsequent Event
Subsequent Event [Line Items]
Unrecognized share-based compensation, recognition period (in years)	5 years
Stock Option
Subsequent Event [Line Items]
Number of shares authorized (up to) (shares)		2,846,681
Stock Option | Subsequent Event
Subsequent Event [Line Items]
Options granted (shares)	2,434,000
Unrecognized share-based compensation expense	$ 10.1
Non-Qualified Stock Option
Subsequent Event [Line Items]
Award vesting period (in years)		10 years
Incentive Stock Option
Subsequent Event [Line Items]
Award vesting period (in years)		10 years
Restricted Stock
Subsequent Event [Line Items]
Number of shares authorized (up to) (shares)		1,138,673
Award vesting period (in years)		5 years
Restricted Stock | Subsequent Event
Subsequent Event [Line Items]
Equity instruments other than options granted (shares)	983,175
Unrecognized share-based compensation expense	$ 13.8