Blue Hills Bancorp (BHBK) 10-Q 4 Nov 16 2016 Q3 Quarterly report Financial data

Document and Entity Information

Document and Entity Information - shares	9 Months Ended
	Sep. 30, 2016	Oct. 31, 2016
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	Accelerated Filer
Document Type	10-Q
Document Period End Date	Sep. 30, 2016
Document Fiscal Year Focus	2,016
Document Fiscal Period Focus	Q3
Amendment Flag	false
Entity Common Stock, Shares Outstanding		26,781,573

Consolidated Balance Sheets (un

Consolidated Balance Sheets (unaudited) - USD ($) $ in Thousands	Sep. 30, 2016	Dec. 31, 2015
Assets
Cash and due from banks	$ 15,490	$ 10,932
Short-term investments	21,512	22,366
Total cash and cash equivalents	37,002	33,298
Securities available for sale, at fair value	210,273	231,690
Securities held to maturity, at amortized cost	197,863	200,141
Federal Home Loan Bank stock, at cost	13,505	13,567
Loans held for sale	2,134	12,877
Loans, net of allowance for loan losses of $17,730 at September 30, 2016 and $17,102 at December 31, 2015	1,741,490	1,523,275
Premises and equipment, net	21,362	20,015
Accrued interest receivable	5,388	5,344
Goodwill	9,160	9,160
Core deposit intangible	1,671	2,625
Net deferred tax asset	8,780	10,665
Bank-owned life insurance	31,743	31,626
Other assets	33,295	20,060
Total assets	2,313,666	2,114,343
Deposits:
Non-interest bearing	184,964	153,155
Interest bearing	1,496,493	1,280,694
Total deposits	1,681,457	1,433,849
Short-term borrowings	103,700	205,000
Long-term debt	105,000	55,000
Accrued expenses and other liabilities	33,820	21,665
Total liabilities	1,923,977	1,715,514
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; 26,996,942 and 28,492,732 issued and outstanding at September 30, 2016 and December 31, 2015, respectively)	261	276
Additional paid-in capital	251,341	269,078
Unearned compensation-ESOP	(20,686)	(21,255)
Retained earnings	158,620	155,918
Accumulated other comprehensive income (loss)	153	(5,188)
Total stockholders' equity	389,689	398,829
Total liabilities and stockholders' equity	$ 2,313,666	$ 2,114,343

Consolidated Balance Sheets (u3

Consolidated Balance Sheets (unaudited) (Parenthetical) - USD ($) $ in Thousands	Sep. 30, 2016	Dec. 31, 2015
Statement of Financial Position [Abstract]
Allowance for Loan Losses	$ 17,730	$ 17,102
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	26,996,942	28,492,732
Common stock, shares outstanding	26,996,942	28,492,732

Consolidated Statements of Net

Consolidated Statements of Net Income (unaudited) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Interest and dividend income:
Interest and fees on loans	$ 15,113	$ 11,509	$ 42,854	$ 32,695
Interest on securities	2,238	2,227	6,570	6,600
Dividends	312	1,673	606	1,885
Other	22	9	74	50
Total interest and dividend income	17,685	15,418	50,104	41,230
Interest expense:
Interest on deposits	2,732	1,926	7,508	5,434
Interest on borrowings	458	287	1,584	811
Total interest expense	3,190	2,213	9,092	6,245
Net interest and dividend income	14,495	13,205	41,012	34,985
Provision for loan losses	2,872	1,318	3,958	2,141
Net interest and dividend income, after provision for loan losses	11,623	11,887	37,054	32,844
Non-interest income:
Deposit account fees	347	319	971	987
Interchange and ATM fees	418	430	1,158	1,133
Mortgage banking	1,262	52	2,037	236
Loan level derivative income	770	513	1,731	1,287
Gains on sales and calls of available-for-sale securities	562	238	937	1,823
Gains on calls of held-to-maturity securities	0	0	45	0
Bank-owned life insurance income	262	258	776	763
Bank-owned life insurance death benefit gains	297	0	506	0
Miscellaneous	214	(116)	159	126
Total non-interest income	4,132	1,694	8,320	6,355
Non-interest expense:
Salaries and employee benefits	7,596	5,591	21,619	16,721
Occupancy and equipment	1,807	1,617	5,079	4,579
Data processing	908	939	2,472	2,601
Professional fees	743	610	1,902	1,909
Advertising	495	620	1,746	1,682
FDIC deposit insurance	270	262	968	807
Directors’ fees	344	112	1,081	329
Amortization of core deposit intangible	294	390	954	1,241
Other general and administrative	777	707	2,416	2,265
Total non-interest expense	13,234	10,848	38,237	32,134
Income before income taxes	2,521	2,733	7,137	7,065
Provision for income taxes	891	923	2,482	2,250
Net income	$ 1,630	$ 1,810	$ 4,655	$ 4,815
Earnings per common share:
Basic (dollars per share)	$ 0.07	$ 0.07	$ 0.19	$ 0.18
Diluted (dollars per share)	$ 0.07	$ 0.07	$ 0.19	$ 0.18
Weighted average shares outstanding:
Basic (shares)	24,129,512	26,183,381	24,585,570	26,250,065
Diluted (shares)	24,307,540	26,183,381	24,708,559	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, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Statement of Comprehensive Income [Abstract]
Net income		$ 1,630	$ 1,810	$ 4,655	$ 4,815
Securities available for sale:
Change in unrealized holding gains (losses)		2,198	(4,504)	9,125	(5,135)
Reclassification adjustment for net gains realized in net income	[1]	(562)	(238)	(937)	(1,823)
Reclassification of unrealized gains on securities transferred to held to maturity		0	(666)	0	(666)
Net change in unrealized gains (losses)		1,636	(5,408)	8,188	(7,624)
Tax effect		(570)	1,887	(2,858)	2,691
Net-of-tax amount		1,066	(3,521)	5,330	(4,933)
Securities held to maturity:
Reclassification of unrealized gains on securities transferred from available for sale		0	666	0	666
Reclassification adjustment for amortization of amounts previously recorded upon transfer from available for sale	[2]	(39)	(35)	(188)	(35)
Tax effect		14	(252)	67	(252)
Net-of-tax amount		(25)	379	(121)	379
Defined benefit pension plan:
Reclassification adjustment for net actuarial loss recognized in net periodic benefit cost	[3]	68	27	204	83
Tax effect		(24)	(8)	(72)	(30)
Net-of-tax amount		44	19	132	53
Other comprehensive income (loss)		1,085	(3,123)	5,341	(4,501)
Comprehensive income (loss)		$ 2,715	$ (1,313)	$ 9,996	$ 314
[1]	Amounts are included in gains on sales and calls of available-for-sale securities, net, in the consolidated statements of net income. Income tax expense associated with the reclassification adjustments for the three months ended September 30, 2016 and 2015 was $196,000 and $76,000, respectively. Income tax expense associated with the reclassification adjustments for the nine months ended September 30, 2016 and 2015 was $327,000 and $640,000, respectively.
[2]	Amounts are included in interest income on securities in the consolidated statements of net income.
[3]	Amounts are included in salaries and benefits expense in the consolidated statements of net income.

Consolidated Statements of Com6

Consolidated Statements of Comprehensive Income (Loss) (unaudited) (Parenthetical) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Statement of Comprehensive Income [Abstract]
Reclassification adjustment for net gains realized in net income, tax	$ 196	$ 76	$ 327	$ 640

Consolidated Statements of Chan

Consolidated Statements of Changes in Stockholders' Equity (unaudited) - USD ($) $ in Thousands	Total	Common Stock	Additional paid-in capital	Unearned compensation- ESOP	Retained earnings	Accumulated other comprehensive income (loss)
Beginning balance at Dec. 31, 2014	$ 411,606	$ 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	314				4,815	(4,501)
ESOP shares committed to be released	782		213	569
Common stock dividends paid ($0.08 and $0.02 per common share for the nine months ended September 30, 2016 and 2015, respectively))	(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	$ 282	276,730	(21,445)	153,969	(1,924)
Ending balance (shares) at Sep. 30, 2015		28,150,313
Beginning balance at Jun. 30, 2015						1,199
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Comprehensive income	(1,313)
Ending balance at Sep. 30, 2015	407,612	$ 282	276,730	(21,445)	153,969	(1,924)
Ending balance (shares) at Sep. 30, 2015		28,150,313
Beginning balance at Dec. 31, 2015	398,829	$ 276	269,078	(21,255)	155,918	(5,188)
Beginning balance (shares) at Dec. 31, 2015		28,492,732
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Comprehensive income	9,996				4,655	5,341
ESOP shares committed to be released	818		249	569
Common stock dividends paid ($0.08 and $0.02 per common share for the nine months ended September 30, 2016 and 2015, respectively))	(1,953)				(1,953)
Repurchase of common stock (shares)		(1,517,840)
Repurchase of common stock	(21,607)	$ (15)	(21,592)
Restricted stock grants (shares)		31,450
Restricted stock grants		$ 0	0
Restricted stock awards forfeited (shares)		(9,400)
Restricted stock awards forfeited		$ 0	0
Share-based compensation expense	3,606		3,606
Ending balance at Sep. 30, 2016	389,689	$ 261	251,341	(20,686)	158,620	153
Ending balance (shares) at Sep. 30, 2016		26,996,942
Beginning balance at Jun. 30, 2016						(932)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Comprehensive income	2,715
Ending balance at Sep. 30, 2016	$ 389,689	$ 261	$ 251,341	$ (20,686)	$ 158,620	$ 153
Ending balance (shares) at Sep. 30, 2016		26,996,942

Consolidated Statements of Cha8

Consolidated Statements of Changes in Stockholders' Equity (unaudited) (Parenthetical) - $ / shares	9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015
Statement of Stockholders' Equity [Abstract]
Common stock paid (dollars per share)	$ 0.08	$ 0.02

Consolidated Statements of Cash

Consolidated Statements of Cash Flows (unaudited) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015
Cash flows from operating activities:
Net income	$ 4,655	$ 4,815
Adjustments to reconcile net income to net cash provided by operating activities:
Provision for loan losses	3,958	2,141
Net amortization of securities	2,427	2,813
Gains on sales and calls of available-for-sale securities, net	(937)	(1,823)
Gains on calls of held-to-maturity securities	(45)	0
Net change in loans held for sale	(798)	571
Net amortization (accretion) of deferred loan origination costs and discounts	414	(130)
Depreciation and amortization of premises and equipment	1,448	1,303
Amortization of core deposit intangible	954	1,241
Bank-owned life insurance income	(1,282)	(763)
ESOP expense	818	782
Deferred income tax provision (benefit)	(978)	274
Share-based compensation expense	3,606	0
Net change in:
Accrued interest receivable	(44)	(741)
Other assets	(13,235)	(3,441)
Accrued expenses and other liabilities	12,359	(6,875)
Net cash provided by operating activities	13,320	167
Activity in securities available for sale:
Purchases	(54,835)	(139,939)
Sales	78,990	91,197
Maturities/calls	2,820	5,632
Principal paydowns	2,129	23,211
Activity in securities held to maturity:
Purchases	(46,396)	(8,074)
Maturities/calls	22,235	3,000
Principal paydowns	25,307	4,108
Loan originations and purchases, net of paydowns	(232,209)	(236,228)
Proceeds from residential portfolio loan sales	21,163	7,608
Net purchases of premises and equipment	(2,795)	(2,000)
Purchase of FHLBB stock	(4,044)	0
Redemption of FHLBB stock	4,106	0
Proceeds from bank-owned life insurance death benefit	1,165	0
Net cash used in investing activities	(182,364)	(251,485)
Cash flows from financing activities:
Net change in deposits, excluding brokered deposits	209,201	96,484
Net change in brokered deposits	38,407	35,758
Net change in short-term borrowings	(101,300)	75,000
Proceeds from long-term debt	50,000	10,000
Repurchase of common stock	(21,607)	(4,521)
Common stock dividends paid	(1,953)	(569)
Net cash provided by financing activities	172,748	212,152
Net change in cash and cash equivalents	3,704	(39,166)
Cash and cash equivalents at beginning of period	33,298	60,146
Cash and cash equivalents at end of period	37,002	20,980
Supplementary information:
Interest paid	8,976	6,215
Income taxes paid, net of refunds	3,438	2,958
Amounts transferred from available for sale to held to maturity	0	196,958
Portfolio loans transferred to loans held for sale designation	$ 0	$ 20,669

Basis of Presentation and Conso

Basis of Presentation and Consolidation	9 Months Ended
	Sep. 30, 2016
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Basis of Presentation and Consolidation	BASIS OF PRESENTATION AND CONSOLIDATION Basis of Presentation The accompanying unaudited interim consolidated financial statements include the accounts of Blue Hills Bancorp, Inc. ("the Company") and its wholly-owned subsidiaries, Blue Hills Funding Corporation and Blue Hills Bank ("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 10 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, 2015, 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. 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. Prior to the second quarter of 2016, for portfolios for which the Company had insufficient prior loss experience, the national peer group losses for relevant portfolios generally over the years 2008-2015 were used. Commencing in the second quarter of 2016, the Company began to phase in its own loss history by loan type based upon the age and loss experience of the loan portfolio. While this change impacted the loss factors used for our Residential real estate, Home equity, Commercial real estate, Commercial business and Consumer loan portfolios, there was no material impact to the amount of the allowance for loan losses. Loss experience is updated at least quarterly with consideration given to unique circumstances in the portfolio. 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. 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 primarily on an extrapolated historical loss experience based on FDIC data for depository institutions with assets of one billion to five billion dollars for periods ranging from 2008-2015, 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 national 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 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 loans, non-accruing loans and accruing adversely-rated loans) and considered impaired. Impairment is measured by either the present value of expected future cash flows discounted at the loan’s effective interest rate or the fair value of the collateral if the loan is collateral dependent. An allowance is established when the discounted cash flows (or collateral value) of the impaired loan is lower than the carrying value of that loan. A loan is considered impaired when, based on current information and events, it is probable that the Company will be unable to collect the scheduled payments of principal or interest when due according to the contractual terms of the loan agreement. Management reviews all loan types for individual impairment. Factors considered by management in determining impairment include payment status, collateral value, and the probability of collecting scheduled principal and interest payments when due. Loans that experience insignificant payment delays and payment shortfalls generally are not classified as impaired. Management determines the significance of payment delays and payment shortfalls on a case-by-case basis, taking into consideration all of the circumstances surrounding the loan and the borrower, including the length of the delay, the reasons for the delay, the borrower’s prior payment record, and the amount of the shortfall in relation to the principal and interest owed. The Company periodically may agree to modify the contractual terms of loans. When a loan is modified and a concession is made to a borrower experiencing financial difficulty, the modification is considered a troubled debt restructuring (“TDR”). All TDRs are initially classified as impaired and generally remain impaired for the remaining life of the loan. 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.

Recent Accounting Standards Upd

Recent Accounting Standards Updates	9 Months Ended
	Sep. 30, 2016
Accounting Changes and Error Corrections [Abstract]
Recent Accounting Standards Updates	RECENT ACCOUNTING STANDARDS UPDATES On August 26, 2016, the Financial Accounting Standards Board ("FASB") issued Accounting Standards Update ("ASU") 2016-15, Statement of Cash Flows (Topic 230) , a consensus of the FASB’s Emerging Issues Task Force. The new guidance is intended to reduce diversity in practice in how certain transactions are classified in the statement of cash flows such as debt repayments, settlement of zero-coupon bonds, settlement of insurance claims and policies, and distributions from equity method investees. For public business entities, the standard is effective for financial statements issued for fiscal years beginning after December 15, 2017, and interim periods within those fiscal years. Early adoption is permitted, provided that all of the amendments are adopted in the same period. The guidance requires application using a retrospective transition method. The impact to the consolidated financial statements upon adopting this Update is not expected to be material.

Securities

Securities	9 Months Ended
	Sep. 30, 2016
Investments, Debt and Equity Securities [Abstract]
Securities	SECURITIES The amortized cost and estimated fair value of securities available for sale and held to maturity, with gross unrealized gains and losses, follows: September 30, 2016 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 securities $ 11,681 $ 2 $ (29 ) $ 11,654 Other asset-backed securities 9,790 15 (158 ) 9,647 Total mortgage- and other asset-backed securities 21,471 17 (187 ) 21,301 Municipal bonds 10,239 386 — 10,625 Financial services: Banks 17,638 262 (2 ) 17,898 Diversified financials 16,563 504 (32 ) 17,035 Insurance and REITs 17,290 493 (3 ) 17,780 Total financial services 51,491 1,259 (37 ) 52,713 Other corporate: Industrials 53,813 1,642 (80 ) 55,375 Utilities 25,160 831 (54 ) 25,937 Total other corporate 78,973 2,473 (134 ) 81,312 Total debt securities 162,174 4,135 (358 ) 165,951 Marketable equity securities: Mutual funds: Domestic community 3,216 115 (8 ) 3,323 Global asset allocation 42,396 145 (1,542 ) 40,999 Total marketable equity securities 45,612 260 (1,550 ) 44,322 Total securities available for sale $ 207,786 $ 4,395 $ (1,908 ) $ 210,273 Securities Held to Maturity: Debt securities: U.S. Treasury $ 600 $ 5 $ — $ 605 Government-sponsored enterprises 26,242 27 (54 ) 26,215 Government-sponsored mortgage-backed and collateralized mortgage obligations 156,291 2,279 (52 ) 158,518 SBA asset-backed securities 14,730 64 (203 ) 14,591 Total securities held to maturity $ 197,863 $ 2,375 $ (309 ) $ 199,929 December 31, 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 securities $ 13,126 $ — $ (195 ) $ 12,931 Other asset-backed securities 11,395 — (142 ) 11,253 Total other mortgage- and asset-backed securities 24,521 — (337 ) 24,184 Municipal bonds 16,016 354 (55 ) 16,315 Financial services: Banks 18,813 138 (90 ) 18,861 Diversified financials 23,124 349 (173 ) 23,300 Insurance and REITs 16,883 1 (282 ) 16,602 Total financial services 58,820 488 (545 ) 58,763 Other corporate: Industrials 55,470 306 (1,244 ) 54,532 Utilities 31,952 7 (1,639 ) 30,320 Total other corporate 87,422 313 (2,883 ) 84,852 Total debt securities 186,779 1,155 (3,820 ) 184,114 Marketable equity securities: Mutual funds: Global equity 5,000 388 — 5,388 Domestic community 3,216 70 (13 ) 3,273 Global asset allocation 42,396 3 (3,484 ) 38,915 Total marketable equity securities 50,612 461 (3,497 ) 47,576 Total securities available for sale $ 237,391 $ 1,616 $ (7,317 ) $ 231,690 Securities Held to Maturity: Debt securities: U.S. Treasury $ 636 $ — $ (2 ) $ 634 Government-sponsored enterprises 28,256 94 (126 ) 28,224 Government-sponsored mortgage-backed and collateralized mortgage obligations 155,232 10 (832 ) 154,410 SBA asset-backed securities 16,017 — (59 ) 15,958 Total securities held to maturity $ 200,141 $ 104 $ (1,019 ) $ 199,226 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, 2016 , there are $383,000 of net holding gains remaining in accumulated other comprehensive income. The amortized cost and estimated fair value of debt securities by contractual maturity at September 30, 2016 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 $ 3,458 $ 3,460 $ 600 $ 605 After 1 year through 5 years 62,541 63,891 11,195 11,214 After 5 years through 10 years 64,129 66,406 15,047 15,001 After 10 years 10,575 10,893 — — 140,703 144,650 26,842 26,820 Mortgage- and asset-backed securities and collateralized mortgage obligations 21,471 21,301 171,021 173,109 $ 162,174 $ 165,951 $ 197,863 $ 199,929 For the three months ended September 30, 2016 and 2015 , proceeds from sales of securities available for sale amounted to $18.8 million and $4.5 million , respectively. Gross realized gains, for the same two periods, amounted to $569,000 and $236,000 , respectively, and gross realized losses amounted to $7,000 and $0 , respectively. For the nine months ended September 30, 2016 and 2015 , proceeds from sales of securities available for sale amounted to $79.0 million and $91.2 million , respectively. Gross realized gains, for the same two periods, amounted to $1.9 million and $1.9 million , respectively, and gross realized losses amounted to $981,000 and $35,000 , 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, 2016 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 $ (5 ) $ 2,607 $ (24 ) $ 7,023 Other asset-backed (3 ) 3,290 (155 ) 3,732 Total mortgage- and other asset-backed securities (8 ) 5,897 (179 ) 10,755 Financial services: Banks (2 ) 1,766 — — Diversified financials (32 ) 1,492 — — Insurance and REITs (3 ) 1,325 — — Total financial services (37 ) 4,583 — — Other corporate: Industrials (35 ) 5,918 (45 ) 2,346 Utilities (38 ) 2,664 (16 ) 779 Total other corporate (73 ) 8,582 (61 ) 3,125 Total debt securities (118 ) 19,062 (240 ) 13,880 Marketable equity securities: Mutual funds: Domestic community — — (8 ) 458 Global asset allocation (89 ) 11,794 (1,453 ) 20,305 Total marketable equity securities (89 ) 11,794 (1,461 ) 20,763 Total temporarily impaired available-for-sale securities $ (207 ) $ 30,856 $ (1,701 ) $ 34,643 Securities Held to Maturity: Debt securities: Government-sponsored enterprises $ (54 ) $ 15,939 $ — $ — Government-sponsored mortgage-backed and collateralized mortgage obligations (52 ) 12,669 — — SBA asset-backed securities (203 ) 11,875 — — Total temporarily impaired held-to-maturity securities $ (309 ) $ 40,483 $ — $ — 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. At September 30, 2016 , multiple debt securities have unrealized losses with aggregate depreciation of less than 2.0% 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, 2016 . At September 30, 2016 , the Company had several mutual funds with unrealized losses of $1.6 million , or 5.0% 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, 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: Other mortgage- and asset-backed securities: Privately issued commercial mortgage- backed securities $ (84 ) $ 5,166 $ (111 ) $ 7,765 Other asset-backed securities (142 ) 11,253 — — Total other mortgage- and asset-backed securities (226 ) 16,419 (111 ) 7,765 Municipal bonds (55 ) 3,324 — — Financial services: Banks (90 ) 14,070 — — Diversified financials (173 ) 15,397 — — Insurance and REITs (282 ) 14,487 — — Total financial services (545 ) 43,954 — — Other corporate: Industrials (957 ) 43,848 (287 ) 395 Utilities (1,387 ) 25,353 (252 ) 1,618 Total other corporate (2,344 ) 69,201 (539 ) 2,013 Total debt securities (3,170 ) 132,898 (650 ) 9,778 Marketable equity securities: Mutual funds: Domestic community — — (13 ) 453 Global asset allocation (3,484 ) 36,609 — — Total marketable equity securities (3,484 ) 36,609 (13 ) 453 Total temporarily impaired available-for-sale securities $ (6,654 ) $ 169,507 $ (663 ) $ 10,231 December 31, 2015 Less Than Twelve Months More Than Twelve Months Gross Unrealized Losses Fair Value Gross Unrealized Losses Fair Value (In thousands) Securities Held to Maturity: Debt securities: U.S. Treasury $ (2 ) $ 634 $ — $ — Government-sponsored enterprises (126 ) 14,084 — — Government-sponsored mortgage-backed and collateralized mortgage obligations (832 ) 144,820 — — SBA asset-backed securities (59 ) 15,958 — — Total temporarily impaired held-to-maturity securities $ (1,019 ) $ 175,496 $ — $ —

Loans and The Allowance for Loa

Loans and The Allowance for Loan Losses	9 Months Ended
	Sep. 30, 2016
Receivables [Abstract]
Loans and The Allowance for Loan Losses	LOANS AND THE ALLOWANCE FOR LOAN LOSSES A summary of the balances of loans follows: September 30, December 31, 2016 2015 (In thousands) Real estate: 1-4 family residential $ 743,601 $ 599,938 Home equity 80,220 77,399 Commercial real estate 661,467 561,203 Construction 71,641 79,773 1,556,929 1,318,313 Commercial business 169,532 182,677 Consumer 30,925 38,186 Total loans 1,757,386 1,539,176 Allowance for loan losses (17,730 ) (17,102 ) Discount and fair value adjustments on purchased loans (1,912 ) (1,959 ) Deferred loan costs and fees, net 3,746 3,160 Loans, net $ 1,741,490 $ 1,523,275 Activity in the allowance for loan losses for the three and nine months ended September 30, 2016 and 2015 , and by loan segment follows: 1-4 Family Home Commercial Construction Commercial Consumer Unallocated Total (In thousands) Three Months Ended September 30, 2016 Allowance at June 30, 2016 $ 3,940 $ 539 $ 7,622 $ 1,747 $ 3,282 $ 496 $ 453 $ 18,079 Provision (credit) for loan losses 272 5 834 (568 ) 2,351 (13 ) (9 ) 2,872 Loans charged-off — — (321 ) — (2,985 ) (17 ) — (3,323 ) Recoveries 100 — — — 2 — — 102 Allowance at September 30, 2016 $ 4,312 $ 544 $ 8,135 $ 1,179 $ 2,650 $ 466 $ 444 $ 17,730 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 1-4 Family Residential Home Equity Commercial Real Estate Construction Commercial Business Consumer Unallocated Total (In thousands) Nine Months Ended September 30, 2016 Allowance at December 31, 2015 $ 3,916 $ 636 $ 7,147 $ 1,364 $ 2,839 $ 772 $ 428 $ 17,102 Provision (credit) for loan losses 296 (92 ) 1,309 (185 ) 2,874 (260 ) 16 3,958 Loans charged-off — — (321 ) — (3,098 ) (46 ) — (3,465 ) Recoveries 100 — — — 35 — — 135 Allowance at September 30, 2016 $ 4,312 $ 544 $ 8,135 $ 1,179 $ 2,650 $ 466 $ 444 $ 17,730 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 Additional information pertaining to the allowance for loan losses at September 30, 2016 and December 31, 2015 is as follows: 1-4 Family Home Commercial Construction Commercial Consumer Unallocated Total (In thousands) September 30, 2016 Allowance related to impaired loans $ — $ — $ — $ — $ — $ — $ — $ — Allowance related to non-impaired loans 4,312 544 8,135 1,179 2,650 466 444 17,730 Total allowance for loan losses $ 4,312 $ 544 $ 8,135 $ 1,179 $ 2,650 $ 466 $ 444 $ 17,730 Impaired loans $ 6,401 $ 589 $ 752 $ — $ 70 $ 178 $ — $ 7,990 Non-impaired loans 737,200 79,631 660,715 71,641 169,462 30,747 — 1,749,396 Total loans $ 743,601 $ 80,220 $ 661,467 $ 71,641 $ 169,532 $ 30,925 $ — $ 1,757,386 December 31, 2015 Allowance related to impaired loans $ — $ — $ 384 $ — $ 10 $ 10 $ — $ 404 Allowance related to non-impaired loans 3,916 636 6,763 1,364 2,829 762 428 16,698 Total allowance for loan losses $ 3,916 $ 636 $ 7,147 $ 1,364 $ 2,839 $ 772 $ 428 $ 17,102 Impaired loans $ 6,114 $ 270 $ 4,631 $ — $ 10 $ 145 $ — $ 11,170 Non-impaired loans 593,824 77,129 556,572 79,773 182,667 38,041 — 1,528,006 Total loans $ 599,938 $ 77,399 $ 561,203 $ 79,773 $ 182,677 $ 38,186 $ — $ 1,539,176 The following is a summary of past due and non-accrual loans, by loan class, at September 30, 2016 and December 31, 2015 : 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, 2016 Real estate: 1-4 family residential $ 2,176 $ 1,311 $ 1,012 $ 4,499 $ 6,260 Home equity 693 387 396 1,476 589 Commercial real estate — — 752 752 752 Commercial business 15 — 28 43 70 Construction 981 — — 981 — Consumer 408 — 82 490 178 Total $ 4,273 $ 1,698 $ 2,270 $ 8,241 $ 7,849 December 31, 2015 Real estate: 1-4 family residential $ 2,287 $ — $ 990 $ 3,277 $ 5,688 Home equity 1,031 19 176 1,226 270 Commercial real estate — 1,249 — 1,249 4,631 Commercial business 23 — — 23 10 Consumer 3 80 120 203 145 Total $ 3,344 $ 1,348 $ 1,286 $ 5,978 $ 10,744 There were no loans past due 90 days or more and still accruing interest at September 30, 2016 and December 31, 2015 . 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, 2016 (In thousands) Impaired loans without a valuation allowance: Real estate: 1-4 family residential $ 6,401 $ 7,011 $ — Home equity 589 764 — Commercial real estate 752 1,073 — Commercial 70 3,140 — Consumer 178 187 — Total impaired loans $ 7,990 $ 12,175 $ — December 31, 2015 Impaired loans without a valuation allowance: Real estate: 1-4 family residential $ 6,114 $ 6,824 $ — Home equity 270 425 — Consumer 35 39 — Total 6,419 7,288 — Impaired loans with a valuation allowance: Commercial real estate 4,631 4,631 384 Commercial business 10 11 10 Consumer 110 110 10 Total 4,751 4,752 404 Total impaired loans $ 11,170 $ 12,040 $ 404 The following tables set forth information regarding average balances and interest income recognized (the majority of which is on a cash basis) on impaired loans by class, for the periods indicated: Average Recorded Investment Interest Income Recognized Three Months Ended September 30, 2016 (In thousands) Real estate: 1-4 family residential $ 6,445 $ 186 Home equity 520 5 Commercial real estate 3,037 41 Consumer 136 2 Commercial 1,538 6 Total $ 11,676 $ 240 Three Months Ended September 30, 2015 Real estate: 1-4 family residential $ 4,559 $ 53 Home equity 717 6 Consumer 95 1 Total $ 5,371 $ 60 Nine Months Ended September 30, 2016 Real estate: 1-4 family residential $ 6,383 $ 331 Home equity 405 13 Commercial real estate 3,755 135 Consumer 156 6 Commercial 771 36 Total $ 11,470 $ 521 Nine Months Ended September 30, 2015 Real estate: 1-4 family residential $ 4,558 $ 196 Home equity 652 20 Consumer 62 3 Total $ 5,272 $ 219 No additional funds are committed to be advanced in connection with impaired loans. There were no significant troubled debt restructurings recorded during the three and nine months ended September 30, 2016 or 2015 . 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, 2016 and December 31, 2015 : 1-4 Family Residential Home Equity Commercial Real Estate Construction Commercial Business Consumer Total Loans (In thousands) September 30, 2016 Loans rated 1 - 6 $ 1,062 $ 295 $ 644,198 $ 71,641 $ 162,047 $ 4 $ 879,247 Loans rated 7 4,033 504 11,242 — 7,442 157 23,378 Loans rated 8 2,003 144 6,027 — 43 31 8,248 Loans rated 9 648 — — — — — 648 Loans rated 10 — — — — — — — Loans not rated 735,855 79,277 — — — 30,733 845,865 $ 743,601 $ 80,220 $ 661,467 $ 71,641 $ 169,532 $ 30,925 $ 1,757,386 December 31, 2015 Loans rated 1 - 6 $ 1,950 $ 465 $ 548,360 $ 79,773 $ 181,792 $ 6 $ 812,346 Loans rated 7 4,461 321 7,765 — 874 — 13,421 Loans rated 8 1,592 144 5,078 — — 149 6,963 Loans rated 9 701 — — — 11 — 712 Loans rated 10 — — — — — — — Loans not rated 591,234 76,469 — — — 38,031 705,734 $ 599,938 $ 77,399 $ 561,203 $ 79,773 $ 182,677 $ 38,186 $ 1,539,176

Derivatives

Derivatives	9 Months Ended
	Sep. 30, 2016
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Derivatives	DERIVATIVES 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 net income. The table below presents information about derivative financial instruments not designated as hedging instruments at September 30, 2016 and December 31, 2015 . Derivative Gains Derivative Losses Notional Amount Fair Value Notional Amount Fair Value (In thousands) September 30, 2016 Economic hedges: Commercial loan level interest rate swap agreements $ 379,736 $ 18,783 $ 379,736 $ 19,893 Other contracts 15,983 33 27,853 140 Total derivatives $ 395,719 $ 18,816 $ 407,589 $ 20,033 December 31, 2015 Economic hedges: Commercial loan level interest rate swap agreements $ 282,546 $ 7,956 $ 282,546 $ 8,411 Other contracts 8,300 6 12,698 78 Total derivatives $ 290,846 $ 7,962 $ 295,244 $ 8,489 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. Mortgage Banking Derivatives The Company enters into commitments to fund residential mortgage loans at specified rates and times in the future, with the intention that loans will subsequently be sold in the secondary market. Mortgage loan commitments are referred to as derivative loan commitments if the loan that will result from exercise of the commitment will be held for sale upon funding. These commitments are recognized at fair value on the consolidated balance sheet in other assets and other liabilities with changes in their fair values recorded in non-interest income. Outstanding loan commitments expose the Company to the risk that the price of the loans arising from exercise of the loan commitment might change from inception of the rate lock to funding of the loan due to changes in mortgage interest rates. If interest rates increase, the value of these loan commitments decreases. Conversely, if interest rates decrease, the value of these loan commitments increases. The notional amount of mortgage loan commitments as of September 30, 2016 was $6.4 million . The fair value of such commitments was $129,000 and was included in other assets on the consolidated balance sheet. To protect against the price risk inherent in derivative loan commitments, the Company utilizes “best efforts” forward loan sale commitments to mitigate the risk of potential decreases in the values of loans that would result from the exercise of the derivative loan commitments. With a “best efforts” contract, the Company commits to deliver an individual mortgage loan of a specified principal amount and quality to an investor if the loan to the underlying borrower closes. Generally, the price the investor will pay the seller for an individual loan is specified prior to the loan being funded (e.g., on the same day the lender commits to lend funds to a potential borrower). The Company expects that these forward sale commitments will experience changes in fair value opposite to the change in fair value of derivative loan commitments. The notional amount of forward loan sale commitments at September 30, 2016 was $8.5 million . The fair value of such commitments was a gain of $19,000 included in other assets and a loss of $35,000 included in other liabilities on the consolidated balance sheet.

Deposits

Deposits	9 Months Ended
	Sep. 30, 2016
Banking and Thrift [Abstract]
Deposits	DEPOSITS A summary of deposit balances, by type, is as follows: September 30, December 31, 2016 2015 (In thousands) NOW and demand $ 337,225 $ 288,143 Regular savings 270,067 287,344 Money market 518,360 368,050 Brokered money market 46,235 41,807 Total non-certificate accounts 1,171,887 985,344 Term certificates of $250,000 or more 79,815 65,364 Term certificates less than $250,000 259,249 246,614 Brokered term certificates 170,506 136,527 Total term certificate accounts 509,570 448,505 Total deposits $ 1,681,457 $ 1,433,849 At September 30, 2016 , the scheduled maturities of term certificate accounts, including brokered deposits, are as follows: Amount Weighted Average Rate (Dollars in thousands) Within 1 year $ 285,918 0.66 % 1-2 years 96,686 1.26 2-3 years 46,631 1.47 3-4 years 59,640 1.98 4 years and beyond 20,695 1.79 $ 509,570 1.05 %

Fair Value Measurements

Fair Value Measurements	9 Months Ended
	Sep. 30, 2016
Fair Value Disclosures [Abstract]
Fair Value Measurements	FAIR VALUE MEASUREMENTS 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 : 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 fair value of borrowings are estimated using discounted cash flow analyses based on the current incremental borrowing rates in the market for similar types of borrowing arrangements. Interest rate swap agreements : 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. Forward loan sale commitments and derivative loan commitments : Fair values of forward loan sale commitments and derivative loan commitments are based on fair values of the underlying mortgage loans and, for derivative loan commitments, fair values also include the value of servicing, deferred origination fees/costs and the probability of such commitments being exercised. Significant management judgment and estimation is required in determining these fair value measurements. 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, 2016 and December 31, 2015 , 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, 2016 Assets Securities available for sale: Debt securities $ — $ 165,951 $ — $ 165,951 Marketable equity securities 44,322 — — 44,322 Derivative assets: Interest rate swap agreements — 18,816 — 18,816 Forward loan sale commitments — — 19 19 Mortgage loan commitments — — 129 129 Total assets $ 44,322 $ 184,767 $ 148 $ 229,237 Liabilities Derivative liabilities: Interest rate swap agreements $ — $ 20,033 $ — $ 20,033 Forward loan sale commitments — — 35 35 Total liabilities $ — $ 20,033 $ 35 $ 20,068 December 31, 2015 Assets Securities available for sale: Debt securities $ — $ 184,114 $ — $ 184,114 Marketable equity securities 47,576 — — 47,576 Interest rate swap agreements — 7,962 — 7,962 Total assets $ 47,576 $ 192,076 $ — $ 239,652 Liabilities Interest rate swap agreements $ — $ 8,489 $ — $ 8,489 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 non-recurring basis in accordance with generally accepted accounting principles. These adjustments to fair value usually result from application of lower-of-cost-or-market accounting or write-downs of individual assets. There are no liabilities measured at fair value on a non-recurring basis. The following table summarizes the fair value hierarchy applicable to assets measured at fair value on a non-recurring basis: September 30, 2016 December 31, 2015 Level 1 Level 2 Level 3 Level 1 Level 2 Level 3 (In thousands) Impaired loans $ — $ — $ 812 $ — $ — $ 4,752 Total assets $ — $ — $ 812 $ — $ — $ 4,752 The following table summarizes the total losses on assets measured at fair value on a non-recurring basis for the three and nine months ended September 30, 2016 and 2015 . Three Months Ended September 30, Nine Months Ended September 30, 2016 2015 2016 2015 (In thousands) Impaired loans $ (2,690 ) $ — $ (2,997 ) $ — Gains and 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, 2016 Financial assets: Cash and cash equivalents $ 37,002 $ 37,002 $ — $ — $ 37,002 Securities available for sale 210,273 44,322 165,951 — 210,273 Securities held to maturity 197,863 605 199,324 199,929 Federal Home Loan Bank stock 13,505 — — 13,505 13,505 Loans and loans held for sale 1,743,624 — — 1,752,000 1,752,000 Accrued interest receivable 5,388 — — 5,388 5,388 Financial liabilities: Deposits 1,681,457 — — 1,684,592 1,684,592 Borrowings 208,700 — 209,099 — 209,099 On-balance sheet derivative financial instruments: Derivative assets: Interest rate swap agreements 18,816 — 18,816 — 18,816 Forward loan sale commitments 19 — — 19 19 Mortgage loan commitments 129 — — 129 129 Derivative liabilities: Interest rate swap agreements 20,033 — 20,033 — 20,033 Forward loan sale commitments 35 — — 35 35 December 31, 2015 Financial assets: Cash and cash equivalents $ 33,298 $ 33,298 $ — $ — $ 33,298 Securities available for sale 231,690 47,576 184,114 — 231,690 Securities held to maturity 200,141 634 198,592 — 199,226 Federal Home Loan Bank stock 13,567 — — 13,567 13,567 Loans and loans held for sale 1,536,152 — — 1,538,809 1,538,809 Accrued interest receivable 5,344 — — 5,344 5,344 Financial liabilities: Deposits 1,433,849 — — 1,434,179 1,434,179 Borrowings 260,000 — 260,244 — 260,244 On-balance sheet derivative financial instruments: Interest rate swap agreements: Assets 7,962 — 7,962 — 7,962 Liabilities 8,489 — 8,489 — 8,489

Comprehensive Income

Comprehensive Income	9 Months Ended
	Sep. 30, 2016
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, 2016 2015 (In thousands) Securities available for sale: Net unrealized gain (loss) $ 2,487 $ (5,701 ) Tax effect (913 ) 1,945 Net-of-tax amount 1,574 (3,756 ) Securities held to maturity: Net unrealized gain on transferred securities 383 571 Tax effect (130 ) (197 ) Net-of-tax amount 253 374 Defined benefit pension plan: Unrecognized net actuarial loss (2,654 ) (2,858 ) Tax effect 980 1,052 Net-of-tax amount (1,674 ) (1,806 ) $ 153 $ (5,188 ) Changes in accumulated other comprehensive income (loss), by component, follow: Three Months Ended September 30, 2016 Securities Available for Sale Securities Held to Maturity Defined Benefit Pension Plan Total (In thousands) Balance at June 30, 2016 $ 508 $ 278 $ (1,718 ) $ (932 ) Other comprehensive income before reclassification adjustments 2,198 — — 2,198 Reclassification adjustments: Net realized gains (562 ) — — (562 ) Amortization of actuarial losses — — 68 68 Amortization of amounts previously recorded upon transfer from available for sale — (39 ) — (39 ) Tax effects (570 ) 14 (24 ) (580 ) Net current-period other comprehensive income (loss) 1,066 (25 ) 44 1,085 Balance at September 30, 2016 $ 1,574 $ 253 $ (1,674 ) $ 153 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 adjustments (4,504 ) — — (4,504 ) Reclassification adjustments: Net realized gains (238 ) — — (238 ) Amortization of actuarial losses — — 27 27 Unrealized gains on securities reclassified as held to maturity (666 ) 666 — — Amortization of amounts previously recorded upon transfer 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 ) Nine Months Ended September 30, 2016 Securities Available for Sale Securities Held to Maturity Defined Benefit Pension Plan Total (In thousands) Balance at December 31, 2015 $ (3,756 ) $ 374 $ (1,806 ) $ (5,188 ) Other comprehensive income before reclassification adjustments 9,125 — — 9,125 Reclassification adjustments: Net realized gains (937 ) — — (937 ) Amortization of actuarial losses — — 204 204 Amortization of amounts previously recorded upon transfer from available for sale — (188 ) — (188 ) Tax effects (2,858 ) 67 (72 ) (2,863 ) Net current-period other comprehensive income (loss) 5,330 (121 ) 132 5,341 Balance at September 30, 2016 $ 1,574 $ 253 $ (1,674 ) $ 153 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 adjustments (5,135 ) — — (5,135 ) Reclassification adjustments: Net realized gains (1,823 ) — — (1,823 ) Amortization of actuarial losses — — 83 83 Unrealized gains on securities reclassified as held to maturity (666 ) 666 — — Amortization of amounts previously recorded upon transfer from available for sale — (35 ) — (35 ) Tax effects 2,691 (252 ) (30 ) 2,409 Net current-period other comprehensive income (loss) (4,933 ) 379 53 (4,501 ) Balance at September 30, 2015 $ (1,541 ) $ 379 $ (762 ) $ (1,924 )

Stockholders' Equity

Stockholders' Equity	9 Months Ended
	Sep. 30, 2016
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. Effective January 1, 2015, federal banking regulations changed with regard to minimum capital requirements for community banking institutions. The regulations include a minimum ratio of common equity Tier 1 capital to risk-weighted assets of 4.5% , raise the minimum ratio of Tier 1 capital to risk-weighted assets from 4% to 6% and include 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 bonuses. The capital conservation buffer is being phased in over three years , commencing January 1, 2016. Also, certain new deductions from and adjustments to regulatory capital will be phased in over several years. Management believes that the Company's capital levels will remain characterized as "well capitalized" throughout the phase in periods. The application of the Capital Conservation Buffer resulted in no limitations to payout of retained earnings as of September 30, 2016 . As of September 30, 2016 , 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 ratios as set forth in the following tables. There are no conditions or events since the notification that management believes have changed the Bank's category. Management believes, as of September 30, 2016 and December 31, 2015 , that the Company and the Bank meet all capital adequacy requirements to which they are subject. The Company's and the Bank's actual capital amounts and ratios as of September 30, 2016 and December 31, 2015 are also presented in the following table. Actual Minimum Capital Requirement Minimum To Be Well Capitalized Amount Ratio Amount Ratio Amount Ratio (Dollars in thousands) Blue Hills Bancorp, Inc.: September 30, 2016 Total capital (to risk weighted assets) $ 394,035 21.7 % $ 145,244 8.0 % 181,555 10.0 % Tier 1 capital (to risk weighted assets) 376,305 20.7 108,933 6.0 145,244 8.0 Common equity Tier 1 (to risk weighted assets) 376,305 20.7 81,700 4.5 118,011 6.5 Tier 1 capital (to average assets) 376,305 16.7 90,155 4.0 112,693 5.0 December 31, 2015 Total capital (to risk weighted assets) $ 407,444 24.8 % $ 131,231 8.0 % 164,039 10.0 % Tier 1 capital (to risk weighted assets) 390,342 23.8 98,423 6.0 131,231 8.0 Common equity Tier 1 (to risk weighted assets) 390,342 23.8 73,818 4.5 106,625 6.5 Tier 1 capital (to average assets) 390,342 19.6 79,658 4.0 99,573 5.0 Blue Hills Bank: September 30, 2016 Total capital (to risk weighted assets) $ 308,013 17.0 % $ 144,952 8.0 % $ 181,190 10.0 % Tier 1 capital (to risk weighted assets) 290,283 16.0 108,714 6.0 144,952 8.0 Common equity Tier 1 (to risk weighted assets) 290,283 16.0 81,536 4.5 117,774 6.5 Tier 1 capital (to average assets) 290,283 12.9 90,127 4.0 112,659 5.0 December 31, 2015 Total capital (to risk weighted assets) $ 296,309 18.1 % $ 130,832 8.0 % $ 163,540 10.0 % Tier 1 capital (to risk weighted assets) 279,207 17.1 98,124 6.0 130,832 8.0 Common equity Tier 1 (to risk weighted assets) 279,207 17.1 73,593 4.5 106,301 6.5 Tier 1 capital (to average assets) 279,207 14.0 79,867 4.0 99,608 5.0

Employee Stock Ownership Plan

Employee Stock Ownership Plan	9 Months Ended
	Sep. 30, 2016
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, 2016 December 31, 2015 Allocated 150,229 75,912 Committed to be allocated 56,986 75,912 Unallocated 2,068,533 2,124,846 2,275,748 2,276,670 The fair value of unallocated shares was approximately $31.1 million and $32.5 million at September 30, 2016 and December 31, 2015 , respectively. Total compensation expense recognized in connection with the ESOP for the three months ended September 30, 2016 and 2015 was $277,000 and $274,000 , respectively. Total compensation expense recognized for the nine months ended September 30, 2016 and 2015 was $818,000 and $782,000 , respectively.

Earnings Per Common Share

Earnings Per Common Share	9 Months Ended
	Sep. 30, 2016
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. Three Months Ended September 30, 2016 2015 (In thousands, except share amounts) Net income applicable to common stock $ 1,630 $ 1,810 Average number of common shares outstanding 26,207,612 28,337,603 Less: Average unallocated ESOP shares (2,078,100 ) (2,154,222 ) Average number of common shares outstanding used to calculate basic earnings per common share 24,129,512 26,183,381 Effect of dilutive unvested restricted stock awards 178,028 — Average number of common shares outstanding used to calculate diluted earnings per common share 24,307,540 26,183,381 Earnings per common share: Basic $ 0.07 $ 0.07 Diluted $ 0.07 $ 0.07 Nine Months Ended September 30, 2016 2015 (In thousands, except share amounts) Net income applicable to common stock $ 4,655 $ 4,815 Average number of common shares outstanding 26,682,260 28,423,110 Less: Average unallocated ESOP shares (2,096,690 ) (2,173,045 ) Average number of common shares outstanding used to calculate basic earnings per common share 24,585,570 26,250,065 Effect of dilutive unvested restricted stock awards 122,989 — Average number of common shares outstanding used to calculate diluted earnings per common share 24,708,559 26,250,065 Earnings per common share: Basic $ 0.19 $ 0.18 Diluted $ 0.19 $ 0.18 Options for 2,461,350 shares were not included in the computation of diluted earnings per common share because to do so would have been antidilutive for the three and nine months ended September 30, 2016 .

Share-Based Compensation

Share-Based Compensation	9 Months Ended
	Sep. 30, 2016
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]
Share-Based Compensation	SHARE-BASED COMPENSATION Under the Blue Hills Bancorp, Inc. 2015 Equity Incentive Plan (the "Equity Plan"), the Company may grant options, restricted stock, restricted units or performance awards to its directors, officers and employees. Both incentive stock options and non-qualified stock options may be granted under the Equity Plan, with the total shares reserved for options equaling 2,846,681 . Board members may only receive non-qualified stock options. 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 . The vast majority of options and awards vest ratably over five years. The fair value of shares awarded is based on the market price at the date of grant. Expense related to options and restricted stock granted to directors is recognized as directors' fees within noninterest expense. The Company has standard form agreements used for stock option and restricted stock awards. The standard form agreements used for the Chief Executive Officer and all other Executive Officers have previously been disclosed in Securities and Exchange Commission filings and generally provide that: (1) any unvested options or unvested restricted stock vest upon a Change in Control; and, that (2) any stock options which vest pursuant to a Change in Control, which is an event described in Section 280G of the Internal Revenue Code of 1986, will be cashed out at the difference between the acquisition price and the exercise price of the stock option. Stock Options The fair value of each option grant is estimated on the date of the grant using the Black-Scholes option-pricing model with the following assumptions: • Volatility is based on peer group volatility because the Company does not have a sufficient trading history. • Expected life represents the period of time that the option is expected to be outstanding, taking into account the contractual term, and the vesting period. • Expected dividend yield is based on the Company's history and expectation of dividend payouts. • The risk-free rate is based on the U.S. Treasury yield curve in effect at the time of grant for a period equivalent to the expected life of the option. The Company made the following awards of options to purchase shares of common stock during the nine months ended September 30, 2016 . Date of grant February 29, 2016 Options granted 55,000 Vesting period (years) 5 Expiration date February 28, 2026 Expected volatility 28.47 % Expected life (years) 6.5 Expected dividend yield 0.58 % Risk free interest rate 1.38 % Fair value per option $ 4.02 A summary of the status of the Company's stock option grants for the nine months ended September 30, 2016 , is presented in the table below: Stock Option Awards Weighted Average Exercise Price Weighted Average Remaining Contractual Term (years) Aggregate Intrinsic Value Outstanding at December 31, 2015 2,434,000 $ 14.07 $ — Granted 55,000 13.80 — Forfeited (27,650 ) 14.07 — Outstanding at September 30, 2016 2,461,350 $ 14.06 9.03 $ 2,353,133 Exercisable at September 30, 2016 — $ — — $ — Unrecognized compensation cost at September 30, 2016 $ 8,237,000 Weighted average remaining recognition period (years) 4.03 For the three and nine months ended September 30, 2016 , share-based compensation expense applicable to the stock options was $513,000 and $ 1,509,000 , respectively, and the recognized tax benefit related to this expense was $126,000 and $376,000 . There was no share-based compensation expense related to stock options for the three and nine months September 30, 2015 . Restricted Stock Shares issued upon vesting may be either authorized but unissued shares or reacquired shares held by the Company. Any shares not issued because vesting requirements are not met will again be available for issuance under the plan. The fair market value of shares awarded, based on the market price at the date of grant, is recorded as unearned compensation and amortized over the applicable vesting period. Of the restricted shares granted, 40,000 are performance based. The following table presents the activity in non-vested stock awards under the Equity Plan for the nine months ended September 30, 2016 : Outstanding Restricted Stock Awards Weighted Average Grant Price Nonvested stock awards at December 31, 2015 983,175 $ 14.07 Granted 31,450 13.83 Forfeited (9,400 ) 14.07 Nonvested stock awards at September 30, 2016 1,005,225 $ 14.06 Unrecognized compensation cost inclusive of directors' fees at September 30,2016 $11,388,000 Weighted average remaining recognition period (years) 4.04 For the three and nine months ended September 30, 2016 , share-based compensation expense applicable to restricted stock awards was $ 712,000 and $2,097,000 , respectively, and the recognized tax benefit related to this expense was $249,000 and $738,000 respectively. There was no share-based compensation expense related to restricted stock awards for the three and nine months ended September 30, 2015 .

Basis of Presentation and Con22

Basis of Presentation and Consolidation (Policies)	9 Months Ended
	Sep. 30, 2016
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 Blue Hills Bancorp, Inc. ("the Company") and its wholly-owned subsidiaries, Blue Hills Funding Corporation and Blue Hills Bank ("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 10 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, 2015, 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.
Loan policies	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. Prior to the second quarter of 2016, for portfolios for which the Company had insufficient prior loss experience, the national peer group losses for relevant portfolios generally over the years 2008-2015 were used. Commencing in the second quarter of 2016, the Company began to phase in its own loss history by loan type based upon the age and loss experience of the loan portfolio. While this change impacted the loss factors used for our Residential real estate, Home equity, Commercial real estate, Commercial business and Consumer loan portfolios, there was no material impact to the amount of the allowance for loan losses. Loss experience is updated at least quarterly with consideration given to unique circumstances in the portfolio. 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. 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 primarily on an extrapolated historical loss experience based on FDIC data for depository institutions with assets of one billion to five billion dollars for periods ranging from 2008-2015, 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 national 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 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 loans, non-accruing loans and accruing adversely-rated loans) and considered impaired. Impairment is measured by either the present value of expected future cash flows discounted at the loan’s effective interest rate or the fair value of the collateral if the loan is collateral dependent. An allowance is established when the discounted cash flows (or collateral value) of the impaired loan is lower than the carrying value of that loan. A loan is considered impaired when, based on current information and events, it is probable that the Company will be unable to collect the scheduled payments of principal or interest when due according to the contractual terms of the loan agreement. Management reviews all loan types for individual impairment. Factors considered by management in determining impairment include payment status, collateral value, and the probability of collecting scheduled principal and interest payments when due. Loans that experience insignificant payment delays and payment shortfalls generally are not classified as impaired. Management determines the significance of payment delays and payment shortfalls on a case-by-case basis, taking into consideration all of the circumstances surrounding the loan and the borrower, including the length of the delay, the reasons for the delay, the borrower’s prior payment record, and the amount of the shortfall in relation to the principal and interest owed. The Company periodically may agree to modify the contractual terms of loans. When a loan is modified and a concession is made to a borrower experiencing financial difficulty, the modification is considered a troubled debt restructuring (“TDR”). All TDRs are initially classified as impaired and generally remain impaired for the remaining life of the loan. 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.
Recent Accounting Standards Updates	RECENT ACCOUNTING STANDARDS UPDATES On August 26, 2016, the Financial Accounting Standards Board ("FASB") issued Accounting Standards Update ("ASU") 2016-15, Statement of Cash Flows (Topic 230) , a consensus of the FASB’s Emerging Issues Task Force. The new guidance is intended to reduce diversity in practice in how certain transactions are classified in the statement of cash flows such as debt repayments, settlement of zero-coupon bonds, settlement of insurance claims and policies, and distributions from equity method investees. For public business entities, the standard is effective for financial statements issued for fiscal years beginning after December 15, 2017, and interim periods within those fiscal years. Early adoption is permitted, provided that all of the amendments are adopted in the same period. The guidance requires application using a retrospective transition method. The impact to the consolidated financial statements upon adopting this Update is not expected to be material.

Securities (Tables)

Securities (Tables)	9 Months Ended
	Sep. 30, 2016
Investments, Debt and Equity Securities [Abstract]
Available-for-sale Securities	The amortized cost and estimated fair value of securities available for sale and held to maturity, with gross unrealized gains and losses, follows: September 30, 2016 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 securities $ 11,681 $ 2 $ (29 ) $ 11,654 Other asset-backed securities 9,790 15 (158 ) 9,647 Total mortgage- and other asset-backed securities 21,471 17 (187 ) 21,301 Municipal bonds 10,239 386 — 10,625 Financial services: Banks 17,638 262 (2 ) 17,898 Diversified financials 16,563 504 (32 ) 17,035 Insurance and REITs 17,290 493 (3 ) 17,780 Total financial services 51,491 1,259 (37 ) 52,713 Other corporate: Industrials 53,813 1,642 (80 ) 55,375 Utilities 25,160 831 (54 ) 25,937 Total other corporate 78,973 2,473 (134 ) 81,312 Total debt securities 162,174 4,135 (358 ) 165,951 Marketable equity securities: Mutual funds: Domestic community 3,216 115 (8 ) 3,323 Global asset allocation 42,396 145 (1,542 ) 40,999 Total marketable equity securities 45,612 260 (1,550 ) 44,322 Total securities available for sale $ 207,786 $ 4,395 $ (1,908 ) $ 210,273 December 31, 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 securities $ 13,126 $ — $ (195 ) $ 12,931 Other asset-backed securities 11,395 — (142 ) 11,253 Total other mortgage- and asset-backed securities 24,521 — (337 ) 24,184 Municipal bonds 16,016 354 (55 ) 16,315 Financial services: Banks 18,813 138 (90 ) 18,861 Diversified financials 23,124 349 (173 ) 23,300 Insurance and REITs 16,883 1 (282 ) 16,602 Total financial services 58,820 488 (545 ) 58,763 Other corporate: Industrials 55,470 306 (1,244 ) 54,532 Utilities 31,952 7 (1,639 ) 30,320 Total other corporate 87,422 313 (2,883 ) 84,852 Total debt securities 186,779 1,155 (3,820 ) 184,114 Marketable equity securities: Mutual funds: Global equity 5,000 388 — 5,388 Domestic community 3,216 70 (13 ) 3,273 Global asset allocation 42,396 3 (3,484 ) 38,915 Total marketable equity securities 50,612 461 (3,497 ) 47,576 Total securities available for sale $ 237,391 $ 1,616 $ (7,317 ) $ 231,690
Held-to-maturity Securities	Securities Held to Maturity: Debt securities: U.S. Treasury $ 600 $ 5 $ — $ 605 Government-sponsored enterprises 26,242 27 (54 ) 26,215 Government-sponsored mortgage-backed and collateralized mortgage obligations 156,291 2,279 (52 ) 158,518 SBA asset-backed securities 14,730 64 (203 ) 14,591 Total securities held to maturity $ 197,863 $ 2,375 $ (309 ) $ 199,929 Securities Held to Maturity: Debt securities: U.S. Treasury $ 636 $ — $ (2 ) $ 634 Government-sponsored enterprises 28,256 94 (126 ) 28,224 Government-sponsored mortgage-backed and collateralized mortgage obligations 155,232 10 (832 ) 154,410 SBA asset-backed securities 16,017 — (59 ) 15,958 Total securities held to maturity $ 200,141 $ 104 $ (1,019 ) $ 199,226
Investments Classified by Contractual Maturity Date	The amortized cost and estimated fair value of debt securities by contractual maturity at September 30, 2016 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 $ 3,458 $ 3,460 $ 600 $ 605 After 1 year through 5 years 62,541 63,891 11,195 11,214 After 5 years through 10 years 64,129 66,406 15,047 15,001 After 10 years 10,575 10,893 — — 140,703 144,650 26,842 26,820 Mortgage- and asset-backed securities and collateralized mortgage obligations 21,471 21,301 171,021 173,109 $ 162,174 $ 165,951 $ 197,863 $ 199,929
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, 2016 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 $ (5 ) $ 2,607 $ (24 ) $ 7,023 Other asset-backed (3 ) 3,290 (155 ) 3,732 Total mortgage- and other asset-backed securities (8 ) 5,897 (179 ) 10,755 Financial services: Banks (2 ) 1,766 — — Diversified financials (32 ) 1,492 — — Insurance and REITs (3 ) 1,325 — — Total financial services (37 ) 4,583 — — Other corporate: Industrials (35 ) 5,918 (45 ) 2,346 Utilities (38 ) 2,664 (16 ) 779 Total other corporate (73 ) 8,582 (61 ) 3,125 Total debt securities (118 ) 19,062 (240 ) 13,880 Marketable equity securities: Mutual funds: Domestic community — — (8 ) 458 Global asset allocation (89 ) 11,794 (1,453 ) 20,305 Total marketable equity securities (89 ) 11,794 (1,461 ) 20,763 Total temporarily impaired available-for-sale securities $ (207 ) $ 30,856 $ (1,701 ) $ 34,643 December 31, 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: Other mortgage- and asset-backed securities: Privately issued commercial mortgage- backed securities $ (84 ) $ 5,166 $ (111 ) $ 7,765 Other asset-backed securities (142 ) 11,253 — — Total other mortgage- and asset-backed securities (226 ) 16,419 (111 ) 7,765 Municipal bonds (55 ) 3,324 — — Financial services: Banks (90 ) 14,070 — — Diversified financials (173 ) 15,397 — — Insurance and REITs (282 ) 14,487 — — Total financial services (545 ) 43,954 — — Other corporate: Industrials (957 ) 43,848 (287 ) 395 Utilities (1,387 ) 25,353 (252 ) 1,618 Total other corporate (2,344 ) 69,201 (539 ) 2,013 Total debt securities (3,170 ) 132,898 (650 ) 9,778 Marketable equity securities: Mutual funds: Domestic community — — (13 ) 453 Global asset allocation (3,484 ) 36,609 — — Total marketable equity securities (3,484 ) 36,609 (13 ) 453 Total temporarily impaired available-for-sale securities $ (6,654 ) $ 169,507 $ (663 ) $ 10,231
Unrealized Gain (Loss) and Fair Value of Investments - Held-to-maturity Securities	Securities Held to Maturity: Debt securities: Government-sponsored enterprises $ (54 ) $ 15,939 $ — $ — Government-sponsored mortgage-backed and collateralized mortgage obligations (52 ) 12,669 — — SBA asset-backed securities (203 ) 11,875 — — Total temporarily impaired held-to-maturity securities $ (309 ) $ 40,483 $ — $ — December 31, 2015 Less Than Twelve Months More Than Twelve Months Gross Unrealized Losses Fair Value Gross Unrealized Losses Fair Value (In thousands) Securities Held to Maturity: Debt securities: U.S. Treasury $ (2 ) $ 634 $ — $ — Government-sponsored enterprises (126 ) 14,084 — — Government-sponsored mortgage-backed and collateralized mortgage obligations (832 ) 144,820 — — SBA asset-backed securities (59 ) 15,958 — — Total temporarily impaired held-to-maturity securities $ (1,019 ) $ 175,496 $ — $ —

Loans and The Allowance for L24

Loans and The Allowance for Loan Losses (Tables)	9 Months Ended
	Sep. 30, 2016
Receivables [Abstract]
Schedule of Accounts, Notes, Loans and Financing Receivable	A summary of the balances of loans follows: September 30, December 31, 2016 2015 (In thousands) Real estate: 1-4 family residential $ 743,601 $ 599,938 Home equity 80,220 77,399 Commercial real estate 661,467 561,203 Construction 71,641 79,773 1,556,929 1,318,313 Commercial business 169,532 182,677 Consumer 30,925 38,186 Total loans 1,757,386 1,539,176 Allowance for loan losses (17,730 ) (17,102 ) Discount and fair value adjustments on purchased loans (1,912 ) (1,959 ) Deferred loan costs and fees, net 3,746 3,160 Loans, net $ 1,741,490 $ 1,523,275
Activity in Allowance for Loan Losses	Activity in the allowance for loan losses for the three and nine months ended September 30, 2016 and 2015 , and by loan segment follows: 1-4 Family Home Commercial Construction Commercial Consumer Unallocated Total (In thousands) Three Months Ended September 30, 2016 Allowance at June 30, 2016 $ 3,940 $ 539 $ 7,622 $ 1,747 $ 3,282 $ 496 $ 453 $ 18,079 Provision (credit) for loan losses 272 5 834 (568 ) 2,351 (13 ) (9 ) 2,872 Loans charged-off — — (321 ) — (2,985 ) (17 ) — (3,323 ) Recoveries 100 — — — 2 — — 102 Allowance at September 30, 2016 $ 4,312 $ 544 $ 8,135 $ 1,179 $ 2,650 $ 466 $ 444 $ 17,730 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 1-4 Family Residential Home Equity Commercial Real Estate Construction Commercial Business Consumer Unallocated Total (In thousands) Nine Months Ended September 30, 2016 Allowance at December 31, 2015 $ 3,916 $ 636 $ 7,147 $ 1,364 $ 2,839 $ 772 $ 428 $ 17,102 Provision (credit) for loan losses 296 (92 ) 1,309 (185 ) 2,874 (260 ) 16 3,958 Loans charged-off — — (321 ) — (3,098 ) (46 ) — (3,465 ) Recoveries 100 — — — 35 — — 135 Allowance at September 30, 2016 $ 4,312 $ 544 $ 8,135 $ 1,179 $ 2,650 $ 466 $ 444 $ 17,730 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
Allowance for Credit Losses on Financing Receivables	Additional information pertaining to the allowance for loan losses at September 30, 2016 and December 31, 2015 is as follows: 1-4 Family Home Commercial Construction Commercial Consumer Unallocated Total (In thousands) September 30, 2016 Allowance related to impaired loans $ — $ — $ — $ — $ — $ — $ — $ — Allowance related to non-impaired loans 4,312 544 8,135 1,179 2,650 466 444 17,730 Total allowance for loan losses $ 4,312 $ 544 $ 8,135 $ 1,179 $ 2,650 $ 466 $ 444 $ 17,730 Impaired loans $ 6,401 $ 589 $ 752 $ — $ 70 $ 178 $ — $ 7,990 Non-impaired loans 737,200 79,631 660,715 71,641 169,462 30,747 — 1,749,396 Total loans $ 743,601 $ 80,220 $ 661,467 $ 71,641 $ 169,532 $ 30,925 $ — $ 1,757,386 December 31, 2015 Allowance related to impaired loans $ — $ — $ 384 $ — $ 10 $ 10 $ — $ 404 Allowance related to non-impaired loans 3,916 636 6,763 1,364 2,829 762 428 16,698 Total allowance for loan losses $ 3,916 $ 636 $ 7,147 $ 1,364 $ 2,839 $ 772 $ 428 $ 17,102 Impaired loans $ 6,114 $ 270 $ 4,631 $ — $ 10 $ 145 $ — $ 11,170 Non-impaired loans 593,824 77,129 556,572 79,773 182,667 38,041 — 1,528,006 Total loans $ 599,938 $ 77,399 $ 561,203 $ 79,773 $ 182,677 $ 38,186 $ — $ 1,539,176
Past Due Financing Receivables	The following is a summary of past due and non-accrual loans, by loan class, at September 30, 2016 and December 31, 2015 : 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, 2016 Real estate: 1-4 family residential $ 2,176 $ 1,311 $ 1,012 $ 4,499 $ 6,260 Home equity 693 387 396 1,476 589 Commercial real estate — — 752 752 752 Commercial business 15 — 28 43 70 Construction 981 — — 981 — Consumer 408 — 82 490 178 Total $ 4,273 $ 1,698 $ 2,270 $ 8,241 $ 7,849 December 31, 2015 Real estate: 1-4 family residential $ 2,287 $ — $ 990 $ 3,277 $ 5,688 Home equity 1,031 19 176 1,226 270 Commercial real estate — 1,249 — 1,249 4,631 Commercial business 23 — — 23 10 Consumer 3 80 120 203 145 Total $ 3,344 $ 1,348 $ 1,286 $ 5,978 $ 10,744
Impaired Financing Receivables	The following tables set forth information regarding average balances and interest income recognized (the majority of which is on a cash basis) on impaired loans by class, for the periods indicated: Average Recorded Investment Interest Income Recognized Three Months Ended September 30, 2016 (In thousands) Real estate: 1-4 family residential $ 6,445 $ 186 Home equity 520 5 Commercial real estate 3,037 41 Consumer 136 2 Commercial 1,538 6 Total $ 11,676 $ 240 Three Months Ended September 30, 2015 Real estate: 1-4 family residential $ 4,559 $ 53 Home equity 717 6 Consumer 95 1 Total $ 5,371 $ 60 Nine Months Ended September 30, 2016 Real estate: 1-4 family residential $ 6,383 $ 331 Home equity 405 13 Commercial real estate 3,755 135 Consumer 156 6 Commercial 771 36 Total $ 11,470 $ 521 Nine Months Ended September 30, 2015 Real estate: 1-4 family residential $ 4,558 $ 196 Home equity 652 20 Consumer 62 3 Total $ 5,272 $ 219 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, 2016 (In thousands) Impaired loans without a valuation allowance: Real estate: 1-4 family residential $ 6,401 $ 7,011 $ — Home equity 589 764 — Commercial real estate 752 1,073 — Commercial 70 3,140 — Consumer 178 187 — Total impaired loans $ 7,990 $ 12,175 $ — December 31, 2015 Impaired loans without a valuation allowance: Real estate: 1-4 family residential $ 6,114 $ 6,824 $ — Home equity 270 425 — Consumer 35 39 — Total 6,419 7,288 — Impaired loans with a valuation allowance: Commercial real estate 4,631 4,631 384 Commercial business 10 11 10 Consumer 110 110 10 Total 4,751 4,752 404 Total impaired loans $ 11,170 $ 12,040 $ 404
Financing Receivable Credit Quality Indicators	The following tables present the Company’s loans by risk rating at September 30, 2016 and December 31, 2015 : 1-4 Family Residential Home Equity Commercial Real Estate Construction Commercial Business Consumer Total Loans (In thousands) September 30, 2016 Loans rated 1 - 6 $ 1,062 $ 295 $ 644,198 $ 71,641 $ 162,047 $ 4 $ 879,247 Loans rated 7 4,033 504 11,242 — 7,442 157 23,378 Loans rated 8 2,003 144 6,027 — 43 31 8,248 Loans rated 9 648 — — — — — 648 Loans rated 10 — — — — — — — Loans not rated 735,855 79,277 — — — 30,733 845,865 $ 743,601 $ 80,220 $ 661,467 $ 71,641 $ 169,532 $ 30,925 $ 1,757,386 December 31, 2015 Loans rated 1 - 6 $ 1,950 $ 465 $ 548,360 $ 79,773 $ 181,792 $ 6 $ 812,346 Loans rated 7 4,461 321 7,765 — 874 — 13,421 Loans rated 8 1,592 144 5,078 — — 149 6,963 Loans rated 9 701 — — — 11 — 712 Loans rated 10 — — — — — — — Loans not rated 591,234 76,469 — — — 38,031 705,734 $ 599,938 $ 77,399 $ 561,203 $ 79,773 $ 182,677 $ 38,186 $ 1,539,176

Derivatives (Tables)

Derivatives (Tables)	9 Months Ended
	Sep. 30, 2016
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, 2016 and December 31, 2015 . Derivative Gains Derivative Losses Notional Amount Fair Value Notional Amount Fair Value (In thousands) September 30, 2016 Economic hedges: Commercial loan level interest rate swap agreements $ 379,736 $ 18,783 $ 379,736 $ 19,893 Other contracts 15,983 33 27,853 140 Total derivatives $ 395,719 $ 18,816 $ 407,589 $ 20,033 December 31, 2015 Economic hedges: Commercial loan level interest rate swap agreements $ 282,546 $ 7,956 $ 282,546 $ 8,411 Other contracts 8,300 6 12,698 78 Total derivatives $ 290,846 $ 7,962 $ 295,244 $ 8,489

Deposits (Tables)

Deposits (Tables)	9 Months Ended
	Sep. 30, 2016
Banking and Thrift [Abstract]
Schedule of Deposit Balances	A summary of deposit balances, by type, is as follows: September 30, December 31, 2016 2015 (In thousands) NOW and demand $ 337,225 $ 288,143 Regular savings 270,067 287,344 Money market 518,360 368,050 Brokered money market 46,235 41,807 Total non-certificate accounts 1,171,887 985,344 Term certificates of $250,000 or more 79,815 65,364 Term certificates less than $250,000 259,249 246,614 Brokered term certificates 170,506 136,527 Total term certificate accounts 509,570 448,505 Total deposits $ 1,681,457 $ 1,433,849
Schedule of Contractual Maturities of Deposits and Weighted Average Rate	At September 30, 2016 , the scheduled maturities of term certificate accounts, including brokered deposits, are as follows: Amount Weighted Average Rate (Dollars in thousands) Within 1 year $ 285,918 0.66 % 1-2 years 96,686 1.26 2-3 years 46,631 1.47 3-4 years 59,640 1.98 4 years and beyond 20,695 1.79 $ 509,570 1.05 %

Fair Value Measurements (Tables

Fair Value Measurements (Tables)	9 Months Ended
	Sep. 30, 2016
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, 2016 Assets Securities available for sale: Debt securities $ — $ 165,951 $ — $ 165,951 Marketable equity securities 44,322 — — 44,322 Derivative assets: Interest rate swap agreements — 18,816 — 18,816 Forward loan sale commitments — — 19 19 Mortgage loan commitments — — 129 129 Total assets $ 44,322 $ 184,767 $ 148 $ 229,237 Liabilities Derivative liabilities: Interest rate swap agreements $ — $ 20,033 $ — $ 20,033 Forward loan sale commitments — — 35 35 Total liabilities $ — $ 20,033 $ 35 $ 20,068 December 31, 2015 Assets Securities available for sale: Debt securities $ — $ 184,114 $ — $ 184,114 Marketable equity securities 47,576 — — 47,576 Interest rate swap agreements — 7,962 — 7,962 Total assets $ 47,576 $ 192,076 $ — $ 239,652 Liabilities Interest rate swap agreements $ — $ 8,489 $ — $ 8,489
Fair Value Measurements, Nonrecurring	The following table summarizes the fair value hierarchy applicable to assets measured at fair value on a non-recurring basis: September 30, 2016 December 31, 2015 Level 1 Level 2 Level 3 Level 1 Level 2 Level 3 (In thousands) Impaired loans $ — $ — $ 812 $ — $ — $ 4,752 Total assets $ — $ — $ 812 $ — $ — $ 4,752 The following table summarizes the total losses on assets measured at fair value on a non-recurring basis for the three and nine months ended September 30, 2016 and 2015 . Three Months Ended September 30, Nine Months Ended September 30, 2016 2015 2016 2015 (In thousands) Impaired loans $ (2,690 ) $ — $ (2,997 ) $ —
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, 2016 Financial assets: Cash and cash equivalents $ 37,002 $ 37,002 $ — $ — $ 37,002 Securities available for sale 210,273 44,322 165,951 — 210,273 Securities held to maturity 197,863 605 199,324 199,929 Federal Home Loan Bank stock 13,505 — — 13,505 13,505 Loans and loans held for sale 1,743,624 — — 1,752,000 1,752,000 Accrued interest receivable 5,388 — — 5,388 5,388 Financial liabilities: Deposits 1,681,457 — — 1,684,592 1,684,592 Borrowings 208,700 — 209,099 — 209,099 On-balance sheet derivative financial instruments: Derivative assets: Interest rate swap agreements 18,816 — 18,816 — 18,816 Forward loan sale commitments 19 — — 19 19 Mortgage loan commitments 129 — — 129 129 Derivative liabilities: Interest rate swap agreements 20,033 — 20,033 — 20,033 Forward loan sale commitments 35 — — 35 35 December 31, 2015 Financial assets: Cash and cash equivalents $ 33,298 $ 33,298 $ — $ — $ 33,298 Securities available for sale 231,690 47,576 184,114 — 231,690 Securities held to maturity 200,141 634 198,592 — 199,226 Federal Home Loan Bank stock 13,567 — — 13,567 13,567 Loans and loans held for sale 1,536,152 — — 1,538,809 1,538,809 Accrued interest receivable 5,344 — — 5,344 5,344 Financial liabilities: Deposits 1,433,849 — — 1,434,179 1,434,179 Borrowings 260,000 — 260,244 — 260,244 On-balance sheet derivative financial instruments: Interest rate swap agreements: Assets 7,962 — 7,962 — 7,962 Liabilities 8,489 — 8,489 — 8,489

Comprehensive Income (Tables)

Comprehensive Income (Tables)	9 Months Ended
	Sep. 30, 2016
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, 2016 2015 (In thousands) Securities available for sale: Net unrealized gain (loss) $ 2,487 $ (5,701 ) Tax effect (913 ) 1,945 Net-of-tax amount 1,574 (3,756 ) Securities held to maturity: Net unrealized gain on transferred securities 383 571 Tax effect (130 ) (197 ) Net-of-tax amount 253 374 Defined benefit pension plan: Unrecognized net actuarial loss (2,654 ) (2,858 ) Tax effect 980 1,052 Net-of-tax amount (1,674 ) (1,806 ) $ 153 $ (5,188 ) Changes in accumulated other comprehensive income (loss), by component, follow: Three Months Ended September 30, 2016 Securities Available for Sale Securities Held to Maturity Defined Benefit Pension Plan Total (In thousands) Balance at June 30, 2016 $ 508 $ 278 $ (1,718 ) $ (932 ) Other comprehensive income before reclassification adjustments 2,198 — — 2,198 Reclassification adjustments: Net realized gains (562 ) — — (562 ) Amortization of actuarial losses — — 68 68 Amortization of amounts previously recorded upon transfer from available for sale — (39 ) — (39 ) Tax effects (570 ) 14 (24 ) (580 ) Net current-period other comprehensive income (loss) 1,066 (25 ) 44 1,085 Balance at September 30, 2016 $ 1,574 $ 253 $ (1,674 ) $ 153 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 adjustments (4,504 ) — — (4,504 ) Reclassification adjustments: Net realized gains (238 ) — — (238 ) Amortization of actuarial losses — — 27 27 Unrealized gains on securities reclassified as held to maturity (666 ) 666 — — Amortization of amounts previously recorded upon transfer 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 ) Nine Months Ended September 30, 2016 Securities Available for Sale Securities Held to Maturity Defined Benefit Pension Plan Total (In thousands) Balance at December 31, 2015 $ (3,756 ) $ 374 $ (1,806 ) $ (5,188 ) Other comprehensive income before reclassification adjustments 9,125 — — 9,125 Reclassification adjustments: Net realized gains (937 ) — — (937 ) Amortization of actuarial losses — — 204 204 Amortization of amounts previously recorded upon transfer from available for sale — (188 ) — (188 ) Tax effects (2,858 ) 67 (72 ) (2,863 ) Net current-period other comprehensive income (loss) 5,330 (121 ) 132 5,341 Balance at September 30, 2016 $ 1,574 $ 253 $ (1,674 ) $ 153 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 adjustments (5,135 ) — — (5,135 ) Reclassification adjustments: Net realized gains (1,823 ) — — (1,823 ) Amortization of actuarial losses — — 83 83 Unrealized gains on securities reclassified as held to maturity (666 ) 666 — — Amortization of amounts previously recorded upon transfer from available for sale — (35 ) — (35 ) Tax effects 2,691 (252 ) (30 ) 2,409 Net current-period other comprehensive income (loss) (4,933 ) 379 53 (4,501 ) Balance at September 30, 2015 $ (1,541 ) $ 379 $ (762 ) $ (1,924 )

Stockholders' Equity (Tables)

Stockholders' Equity (Tables)	9 Months Ended
	Sep. 30, 2016
Equity [Abstract]
Schedule of Compliance with Regulatory Capital Requirements under Banking Regulations	The Company's and the Bank's actual capital amounts and ratios as of September 30, 2016 and December 31, 2015 are also presented in the following table. Actual Minimum Capital Requirement Minimum To Be Well Capitalized Amount Ratio Amount Ratio Amount Ratio (Dollars in thousands) Blue Hills Bancorp, Inc.: September 30, 2016 Total capital (to risk weighted assets) $ 394,035 21.7 % $ 145,244 8.0 % 181,555 10.0 % Tier 1 capital (to risk weighted assets) 376,305 20.7 108,933 6.0 145,244 8.0 Common equity Tier 1 (to risk weighted assets) 376,305 20.7 81,700 4.5 118,011 6.5 Tier 1 capital (to average assets) 376,305 16.7 90,155 4.0 112,693 5.0 December 31, 2015 Total capital (to risk weighted assets) $ 407,444 24.8 % $ 131,231 8.0 % 164,039 10.0 % Tier 1 capital (to risk weighted assets) 390,342 23.8 98,423 6.0 131,231 8.0 Common equity Tier 1 (to risk weighted assets) 390,342 23.8 73,818 4.5 106,625 6.5 Tier 1 capital (to average assets) 390,342 19.6 79,658 4.0 99,573 5.0 Blue Hills Bank: September 30, 2016 Total capital (to risk weighted assets) $ 308,013 17.0 % $ 144,952 8.0 % $ 181,190 10.0 % Tier 1 capital (to risk weighted assets) 290,283 16.0 108,714 6.0 144,952 8.0 Common equity Tier 1 (to risk weighted assets) 290,283 16.0 81,536 4.5 117,774 6.5 Tier 1 capital (to average assets) 290,283 12.9 90,127 4.0 112,659 5.0 December 31, 2015 Total capital (to risk weighted assets) $ 296,309 18.1 % $ 130,832 8.0 % $ 163,540 10.0 % Tier 1 capital (to risk weighted assets) 279,207 17.1 98,124 6.0 130,832 8.0 Common equity Tier 1 (to risk weighted assets) 279,207 17.1 73,593 4.5 106,301 6.5 Tier 1 capital (to average assets) 279,207 14.0 79,867 4.0 99,608 5.0

Employee Stock Ownership Plan (

Employee Stock Ownership Plan (Tables)	9 Months Ended
	Sep. 30, 2016
Compensation and Retirement Disclosure [Abstract]
Employee Stock Ownership Plan (ESOP) Disclosures	Shares held by the ESOP include the following: September 30, 2016 December 31, 2015 Allocated 150,229 75,912 Committed to be allocated 56,986 75,912 Unallocated 2,068,533 2,124,846 2,275,748 2,276,670

Earnings Per Common Share (Tabl

Earnings Per Common Share (Tables)	9 Months Ended
	Sep. 30, 2016
Earnings Per Share [Abstract]
Schedule of Earnings Per Share, Basic and Diluted	Three Months Ended September 30, 2016 2015 (In thousands, except share amounts) Net income applicable to common stock $ 1,630 $ 1,810 Average number of common shares outstanding 26,207,612 28,337,603 Less: Average unallocated ESOP shares (2,078,100 ) (2,154,222 ) Average number of common shares outstanding used to calculate basic earnings per common share 24,129,512 26,183,381 Effect of dilutive unvested restricted stock awards 178,028 — Average number of common shares outstanding used to calculate diluted earnings per common share 24,307,540 26,183,381 Earnings per common share: Basic $ 0.07 $ 0.07 Diluted $ 0.07 $ 0.07 Nine Months Ended September 30, 2016 2015 (In thousands, except share amounts) Net income applicable to common stock $ 4,655 $ 4,815 Average number of common shares outstanding 26,682,260 28,423,110 Less: Average unallocated ESOP shares (2,096,690 ) (2,173,045 ) Average number of common shares outstanding used to calculate basic earnings per common share 24,585,570 26,250,065 Effect of dilutive unvested restricted stock awards 122,989 — Average number of common shares outstanding used to calculate diluted earnings per common share 24,708,559 26,250,065 Earnings per common share: Basic $ 0.19 $ 0.18 Diluted $ 0.19 $ 0.18

Share-Based Compensation (Table

Share-Based Compensation (Tables)	9 Months Ended
	Sep. 30, 2016
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]
Schedule of Share-based Payment Award, Stock Options, Valuation Assumptions	The Company made the following awards of options to purchase shares of common stock during the nine months ended September 30, 2016 . Date of grant February 29, 2016 Options granted 55,000 Vesting period (years) 5 Expiration date February 28, 2026 Expected volatility 28.47 % Expected life (years) 6.5 Expected dividend yield 0.58 % Risk free interest rate 1.38 % Fair value per option $ 4.02
Schedule of Share-based Compensation, Stock Options, Activity	A summary of the status of the Company's stock option grants for the nine months ended September 30, 2016 , is presented in the table below: Stock Option Awards Weighted Average Exercise Price Weighted Average Remaining Contractual Term (years) Aggregate Intrinsic Value Outstanding at December 31, 2015 2,434,000 $ 14.07 $ — Granted 55,000 13.80 — Forfeited (27,650 ) 14.07 — Outstanding at September 30, 2016 2,461,350 $ 14.06 9.03 $ 2,353,133 Exercisable at September 30, 2016 — $ — — $ — Unrecognized compensation cost at September 30, 2016 $ 8,237,000 Weighted average remaining recognition period (years) 4.03
Schedule of Share-based Compensation, Restricted Stock Units Award Activity	The following table presents the activity in non-vested stock awards under the Equity Plan for the nine months ended September 30, 2016 : Outstanding Restricted Stock Awards Weighted Average Grant Price Nonvested stock awards at December 31, 2015 983,175 $ 14.07 Granted 31,450 13.83 Forfeited (9,400 ) 14.07 Nonvested stock awards at September 30, 2016 1,005,225 $ 14.06 Unrecognized compensation cost inclusive of directors' fees at September 30,2016 $11,388,000 Weighted average remaining recognition period (years) 4.04

Basis of Presentation and Con33

Basis of Presentation and Consolidation (Details)	9 Months Ended
	Sep. 30, 2016
1-4 Family Residential
Subsidiary or Equity Method Investee [Line Items]
Origination covenants, maximum loan-to-value ratio (greater than) (percent)	80.00%

Securities - Available-for-sale

Securities - Available-for-sale Securities (Details) - USD ($) $ in Thousands	Sep. 30, 2016	Dec. 31, 2015
Debt securities:
Amortized Cost	$ 162,174	$ 186,779
Gross Unrealized Gains	4,135	1,155
Gross Unrealized Losses	(358)	(3,820)
Fair Value	165,951	184,114
Marketable equity securities:
Amortized Cost	45,612	50,612
Gross Unrealized Gains	260	461
Gross Unrealized Losses	(1,550)	(3,497)
Fair Value	44,322	47,576
Available-for-sale securities:
Amortized Cost	207,786	237,391
Gross Unrealized Gains	4,395	1,616
Gross Unrealized Losses	(1,908)	(7,317)
Fair Value	210,273	231,690
Privately issued commercial mortgage- backed securities
Debt securities:
Amortized Cost	11,681	13,126
Gross Unrealized Gains	2	0
Gross Unrealized Losses	(29)	(195)
Fair Value	11,654	12,931
Other asset-backed securities
Debt securities:
Amortized Cost	9,790	11,395
Gross Unrealized Gains	15	0
Gross Unrealized Losses	(158)	(142)
Fair Value	9,647	11,253
Total mortgage- and other asset-backed securities
Debt securities:
Amortized Cost	21,471	24,521
Gross Unrealized Gains	17	0
Gross Unrealized Losses	(187)	(337)
Fair Value	21,301	24,184
Municipal bonds
Debt securities:
Amortized Cost	10,239	16,016
Gross Unrealized Gains	386	354
Gross Unrealized Losses	0	(55)
Fair Value	10,625	16,315
Global Equity
Marketable equity securities:
Amortized Cost		5,000
Gross Unrealized Gains		388
Gross Unrealized Losses		0
Fair Value		5,388
Domestic community
Marketable equity securities:
Amortized Cost	3,216	3,216
Gross Unrealized Gains	115	70
Gross Unrealized Losses	(8)	(13)
Fair Value	3,323	3,273
Global asset allocation
Marketable equity securities:
Amortized Cost	42,396	42,396
Gross Unrealized Gains	145	3
Gross Unrealized Losses	(1,542)	(3,484)
Fair Value	40,999	38,915
Other Corporate | Corporate debt securities
Debt securities:
Amortized Cost	78,973	87,422
Gross Unrealized Gains	2,473	313
Gross Unrealized Losses	(134)	(2,883)
Fair Value	81,312	84,852
Industrials | Corporate debt securities
Debt securities:
Amortized Cost	53,813	55,470
Gross Unrealized Gains	1,642	306
Gross Unrealized Losses	(80)	(1,244)
Fair Value	55,375	54,532
Utilities | Corporate debt securities
Debt securities:
Amortized Cost	25,160	31,952
Gross Unrealized Gains	831	7
Gross Unrealized Losses	(54)	(1,639)
Fair Value	25,937	30,320
Financial Services | Corporate debt securities
Debt securities:
Amortized Cost	51,491	58,820
Gross Unrealized Gains	1,259	488
Gross Unrealized Losses	(37)	(545)
Fair Value	52,713	58,763
Banks | Corporate debt securities
Debt securities:
Amortized Cost	17,638	18,813
Gross Unrealized Gains	262	138
Gross Unrealized Losses	(2)	(90)
Fair Value	17,898	18,861
Diversified Financials | Corporate debt securities
Debt securities:
Amortized Cost	16,563	23,124
Gross Unrealized Gains	504	349
Gross Unrealized Losses	(32)	(173)
Fair Value	17,035	23,300
Insurance and REITs | Corporate debt securities
Debt securities:
Amortized Cost	17,290	16,883
Gross Unrealized Gains	493	1
Gross Unrealized Losses	(3)	(282)
Fair Value	$ 17,780	$ 16,602

Securities - Held-to-maturity S

Securities - Held-to-maturity Securities (Details) - USD ($) $ in Thousands	Sep. 30, 2016	Dec. 31, 2015
Schedule of Held-to-maturity Securities [Line Items]
Amortized Cost	$ 197,863	$ 200,141
Gross Unrealized Gains	2,375	104
Gross Unrealized Losses	(309)	(1,019)
Fair Value	199,929	199,226
U.S. Treasury
Schedule of Held-to-maturity Securities [Line Items]
Amortized Cost	600	636
Gross Unrealized Gains	5	0
Gross Unrealized Losses	0	(2)
Fair Value	605	634
Government-sponsored enterprises
Schedule of Held-to-maturity Securities [Line Items]
Amortized Cost	26,242	28,256
Gross Unrealized Gains	27	94
Gross Unrealized Losses	(54)	(126)
Fair Value	26,215	28,224
Government-sponsored mortgage-backed and collateralized mortgage obligations
Schedule of Held-to-maturity Securities [Line Items]
Amortized Cost	156,291	155,232
Gross Unrealized Gains	2,279	10
Gross Unrealized Losses	(52)	(832)
Fair Value	158,518	154,410
SBA asset-backed securities
Schedule of Held-to-maturity Securities [Line Items]
Amortized Cost	14,730	16,017
Gross Unrealized Gains	64	0
Gross Unrealized Losses	(203)	(59)
Fair Value	$ 14,591	$ 15,958

Securities - Schedule of Contra

Securities - Schedule of Contractual Maturities of Securities (Details) - USD ($) $ in Thousands	Sep. 30, 2016	Dec. 31, 2015
Available-for-sale Securities, Amortized Cost Basis [Abstract]
Within 1 year, Available for Sale, Amortized Cost	$ 3,458
After 1 year through 5 years, Available for Sale, Amortized Cost	62,541
After 5 years through 10 years, Available for Sale, Amortized Cost	64,129
After 10 years, Available for Sale, Amortized Cost	10,575
Single Maturity Date, Available for Sale, Amortized Cost	140,703
Mortgage- and asset-backed securities and collateralized mortgage obligations - Amortized Basis	21,471
Amortized Cost	162,174	$ 186,779
Available-for-sale Securities, Debt Maturities, Fair Value, Fiscal Year Maturity [Abstract]
Within 1 year, Available for Sale, Fair Value	3,460
After 1 year through 5 years, Available for Sale, Fair Value	63,891
After 5 years through 10 years, Available for Sale, Fair Value	66,406
After 10 years, Available for Sale, Fair Value	10,893
Single Maturity Date, Available for Sale, Fair Value	144,650
Mortgage- and asset-backed securities and collateralized mortgage obligations - Fair Value	21,301
Available-for-sale securities, total debt securities	165,951	184,114
Held-to-maturity Securities, Debt Maturities, Single Maturity Date, Amortized Cost Basis [Abstract]
Within 1 year, Held to Maturity, Amortized Cost	600
After 1 year through 5 years, Held to Maturity, Amortized Cost	11,195
After 5 years through 10 years, Held to Maturity, Amortized Cost	15,047
After 10 years, Held to Maturity, Amortized Cost	0
Single Maturity Date, Held to Maturity, Amortized Cost	26,842
Mortgage- and asset-backed securities and collateralized mortgage obligations - Amortized Basis	171,021
Amortized Cost	197,863	200,141
Held-to-maturity Securities, Debt Maturities, Single Maturity Date, Fair Value [Abstract]
Within 1 year, Held to Maturity, Fair Value	605
After 1 year through 5 years, Held to Maturity, Fair Value	11,214
After 5 years through 10 years, Held to Maturity, Fair Value	15,001
After 10 years, Held to Maturity, Fair Value	0
Single Maturity Date, Held to Maturity, Fair Value	26,820
Mortgage- and asset-backed securities and collateralized mortgage obligations - Fair Value	173,109
Held-to-maturity securities, total debt securities	$ 199,929	$ 199,226

Securities - Available-for-sa37

Securities - Available-for-sale Securities Unrealized Loss (Details) - USD ($) $ in Thousands	Sep. 30, 2016	Dec. 31, 2015
Available-for-sale Securities, Continuous Unrealized Loss Position, Aggregate Loss [Abstract]
Gross Unrealized Losses - Less than twelve months	$ (207)	$ (6,654)
Gross Unrealized Losses - More than twelve months	(1,701)	(663)
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value [Abstract]
Fair Value - Less than twelve months	30,856	169,507
Fair Value - More than twelve months	34,643	10,231
Total debt securities
Available-for-sale Securities, Continuous Unrealized Loss Position, Aggregate Loss [Abstract]
Gross Unrealized Losses - Less than twelve months	(118)	(3,170)
Gross Unrealized Losses - More than twelve months	(240)	(650)
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value [Abstract]
Fair Value - Less than twelve months	19,062	132,898
Fair Value - More than twelve months	13,880	9,778
Privately issued commercial mortgage- backed securities
Available-for-sale Securities, Continuous Unrealized Loss Position, Aggregate Loss [Abstract]
Gross Unrealized Losses - Less than twelve months	(5)	(84)
Gross Unrealized Losses - More than twelve months	(24)	(111)
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value [Abstract]
Fair Value - Less than twelve months	2,607	5,166
Fair Value - More than twelve months	7,023	7,765
Other asset-backed securities
Available-for-sale Securities, Continuous Unrealized Loss Position, Aggregate Loss [Abstract]
Gross Unrealized Losses - Less than twelve months	(3)	(142)
Gross Unrealized Losses - More than twelve months	(155)	0
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value [Abstract]
Fair Value - Less than twelve months	3,290	11,253
Fair Value - More than twelve months	3,732	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	(8)	(226)
Gross Unrealized Losses - More than twelve months	(179)	(111)
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value [Abstract]
Fair Value - Less than twelve months	5,897	16,419
Fair Value - More than twelve months	10,755	7,765
Municipal bonds
Available-for-sale Securities, Continuous Unrealized Loss Position, Aggregate Loss [Abstract]
Gross Unrealized Losses - Less than twelve months		(55)
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		3,324
Fair Value - More than twelve months		0
Total marketable equity securities
Available-for-sale Securities, Continuous Unrealized Loss Position, Aggregate Loss [Abstract]
Gross Unrealized Losses - Less than twelve months	(89)	(3,484)
Gross Unrealized Losses - More than twelve months	(1,461)	(13)
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value [Abstract]
Fair Value - Less than twelve months	11,794	36,609
Fair Value - More than twelve months	20,763	453
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	(8)	(13)
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	458	453
Global asset allocation
Available-for-sale Securities, Continuous Unrealized Loss Position, Aggregate Loss [Abstract]
Gross Unrealized Losses - Less than twelve months	(89)	(3,484)
Gross Unrealized Losses - More than twelve months	(1,453)	0
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value [Abstract]
Fair Value - Less than twelve months	11,794	36,609
Fair Value - More than twelve months	20,305	0
Other Corporate | Corporate debt securities
Available-for-sale Securities, Continuous Unrealized Loss Position, Aggregate Loss [Abstract]
Gross Unrealized Losses - Less than twelve months	(73)	(2,344)
Gross Unrealized Losses - More than twelve months	(61)	(539)
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value [Abstract]
Fair Value - Less than twelve months	8,582	69,201
Fair Value - More than twelve months	3,125	2,013
Industrials | Corporate debt securities
Available-for-sale Securities, Continuous Unrealized Loss Position, Aggregate Loss [Abstract]
Gross Unrealized Losses - Less than twelve months	(35)	(957)
Gross Unrealized Losses - More than twelve months	(45)	(287)
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value [Abstract]
Fair Value - Less than twelve months	5,918	43,848
Fair Value - More than twelve months	2,346	395
Utilities | Corporate debt securities
Available-for-sale Securities, Continuous Unrealized Loss Position, Aggregate Loss [Abstract]
Gross Unrealized Losses - Less than twelve months	(38)	(1,387)
Gross Unrealized Losses - More than twelve months	(16)	(252)
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value [Abstract]
Fair Value - Less than twelve months	2,664	25,353
Fair Value - More than twelve months	779	1,618
Financial Services | Corporate debt securities
Available-for-sale Securities, Continuous Unrealized Loss Position, Aggregate Loss [Abstract]
Gross Unrealized Losses - Less than twelve months	(37)	(545)
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	4,583	43,954
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	(2)	(90)
Gross Unrealized Losses - More than twelve months	0	0
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value [Abstract]
Fair Value - Less than twelve months	1,766	14,070
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	(32)	(173)
Gross Unrealized Losses - More than twelve months	0	0
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value [Abstract]
Fair Value - Less than twelve months	1,492	15,397
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	(3)	(282)
Gross Unrealized Losses - More than twelve months	0	0
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value [Abstract]
Fair Value - Less than twelve months	1,325	14,487
Fair Value - More than twelve months	$ 0	$ 0

Securities - Held-to-maturity38

Securities - Held-to-maturity Securities Unrealized Loss (Details) - USD ($) $ in Thousands	9 Months Ended	12 Months Ended
	Sep. 30, 2016	Dec. 31, 2015
Held-to-maturity Securities, Continuous Unrealized Loss Position, Aggregate Loss [Abstract]
Gross Unrealized Losses - Less than twelve months	$ (309)	$ (1,019)
Gross Unrealized Losses - More than twelve months	0	0
Held-to-maturity Securities, Continuous Unrealized Loss Position, Fair Value [Abstract]
Fair Value - Less than twelve months	40,483	175,496
Fair Value - More than twelve months	0	0
U.S. Treasury
Held-to-maturity Securities, Continuous Unrealized Loss Position, Aggregate Loss [Abstract]
Gross Unrealized Losses - Less than twelve months		(2)
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		634
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	(54)	(126)
Gross Unrealized Losses - More than twelve months	0	0
Held-to-maturity Securities, Continuous Unrealized Loss Position, Fair Value [Abstract]
Fair Value - Less than twelve months	15,939	14,084
Fair Value - More than twelve months	0	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	(52)	(832)
Gross Unrealized Losses - More than twelve months	0	0
Held-to-maturity Securities, Continuous Unrealized Loss Position, Fair Value [Abstract]
Fair Value - Less than twelve months	12,669	144,820
Fair Value - More than twelve months	0	0
SBA asset-backed securities
Held-to-maturity Securities, Continuous Unrealized Loss Position, Aggregate Loss [Abstract]
Gross Unrealized Losses - Less than twelve months	(203)	(59)
Gross Unrealized Losses - More than twelve months	0	0
Held-to-maturity Securities, Continuous Unrealized Loss Position, Fair Value [Abstract]
Fair Value - Less than twelve months	11,875	15,958
Fair Value - More than twelve months	$ 0	$ 0

Securities - Narrative (Details

Securities - Narrative (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015	Dec. 31, 2015
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
Proceeds from sale of available-for-sale securities	$ 18,800	4,500	$ 78,990	91,197
Available-for-sale securities, gross realized gains	600	236	1,900	1,900
Available-for-sale securities, gross realized losses	$ (7)	$ 0	$ (981)	$ (35)
Depreciation, percentage of amortized cost basis	2.00%		2.00%
Gross Unrealized Losses - More than twelve months	$ 1,701		$ 1,701		$ 663
Mutual Funds
Schedule of Available-for-sale Securities [Line Items]
Depreciation, percentage of amortized cost basis	5.00%		5.00%
Gross Unrealized Losses - More than twelve months	$ 1,600		$ 1,600
Securities Held to Maturity | Accumulated Net Investment Gain (Loss)
Schedule of Available-for-sale Securities [Line Items]
Gross unrealized gains	$ 383		$ 383		$ 571

Loans and The Allowance for L40

Loans and The Allowance for Loan Losses - Summary of Loan balances (Details) - USD ($) $ in Thousands	Sep. 30, 2016	Dec. 31, 2015
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	$ 1,757,386	$ 1,539,176
Allowance for loan losses	(17,730)	(17,102)
Discount and fair value adjustments on purchased loans	(1,912)	(1,959)
Deferred loan costs and fees, net	3,746	3,160
Loans, net	1,741,490	1,523,275
Consumer and Commercial Portfolio Segment | Construction
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	71,641	79,773
Consumer, Excluding Consumer Other Portfolio Segment
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	1,556,929	1,318,313
Consumer, Excluding Consumer Other Portfolio Segment | 1-4 Family Residential
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	743,601	599,938
Consumer, Excluding Consumer Other Portfolio Segment | Home Equity
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	80,220	77,399
Consumer, Excluding Consumer Other Portfolio Segment | Commercial Real Estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	661,467	561,203
Commercial Portfolio Segment
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	169,532	182,677
Consumer Other Portfolio Segment
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	$ 30,925	$ 38,186

Loans and The Allowance for L41

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, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Loans and Leases Receivable, Beginning Allowance	$ 18,079	$ 13,777	$ 17,102	$ 12,973
Provision (credit) for loan losses	2,872	1,318	3,958	2,141
Loans charged-off	(3,323)	(13)	(3,465)	(32)
Recoveries	102	0	135	0
Loans and Leases Receivable, Ending Allowance	17,730	15,082	17,730	15,082
Unallocated
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Loans and Leases Receivable, Beginning Allowance	453	688	428	658
Provision (credit) for loan losses	(9)	65	16	95
Loans charged-off	0	0	0	0
Recoveries	0	0	0	0
Loans and Leases Receivable, Ending Allowance	444	753	444	753
Consumer, Excluding Consumer Other Portfolio Segment | 1-4 Family Residential
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Loans and Leases Receivable, Beginning Allowance	3,940	3,407	3,916	3,222
Provision (credit) for loan losses	272	153	296	338
Loans charged-off	0	0	0	0
Recoveries	100	0	100	0
Loans and Leases Receivable, Ending Allowance	4,312	3,560	4,312	3,560
Consumer, Excluding Consumer Other Portfolio Segment | Home Equity
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Loans and Leases Receivable, Beginning Allowance	539	419	636	340
Provision (credit) for loan losses	5	126	(92)	205
Loans charged-off	0	0	0	0
Recoveries	0	0	0	0
Loans and Leases Receivable, Ending Allowance	544	545	544	545
Consumer, Excluding Consumer Other Portfolio Segment | Commercial Real Estate
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Loans and Leases Receivable, Beginning Allowance	7,622	4,568	7,147	3,551
Provision (credit) for loan losses	834	652	1,309	1,669
Loans charged-off	(321)	0	(321)	0
Recoveries	0	0	0	0
Loans and Leases Receivable, Ending Allowance	8,135	5,220	8,135	5,220
Consumer and Commercial Portfolio Segment | Construction
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Loans and Leases Receivable, Beginning Allowance	1,747	1,024	1,364	1,056
Provision (credit) for loan losses	(568)	(302)	(185)	(334)
Loans charged-off	0	0	0	0
Recoveries	0	0	0	0
Loans and Leases Receivable, Ending Allowance	1,179	722	1,179	722
Commercial Portfolio Segment
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Loans and Leases Receivable, Beginning Allowance	3,282	2,991	2,839	3,410
Provision (credit) for loan losses	2,351	580	2,874	161
Loans charged-off	(2,985)	0	(3,098)	0
Recoveries	2	0	35	0
Loans and Leases Receivable, Ending Allowance	2,650	3,571	2,650	3,571
Consumer Other Portfolio Segment
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Loans and Leases Receivable, Beginning Allowance	496	680	772	736
Provision (credit) for loan losses	(13)	44	(260)	7
Loans charged-off	(17)	(13)	(46)	(32)
Recoveries	0	0	0	0
Loans and Leases Receivable, Ending Allowance	$ 466	$ 711	$ 466	$ 711

Loans and The Allowance for L42

Loans and The Allowance for Loan Losses - Additional Activity in Allowance for Loan Losses (Details) - USD ($)	Sep. 30, 2016	Jun. 30, 2016	Dec. 31, 2015	Sep. 30, 2015	Jun. 30, 2015	Dec. 31, 2014
Financing Receivable, Allowance for Credit Losses [Line Items]
Allowance related to impaired loans	$ 0		$ 404,000
Allowance related to non-impaired loans	17,730,000		16,698,000
Total allowance for loan losses	17,730,000	$ 18,079,000	17,102,000	$ 15,082,000	$ 13,777,000	$ 12,973,000
Impaired loans	7,990,000		11,170,000
Non-impaired loans	1,749,396,000		1,528,006,000
Total loans	1,757,386,000		1,539,176,000
Unallocated
Financing Receivable, Allowance for Credit Losses [Line Items]
Allowance related to impaired loans	0		0
Allowance related to non-impaired loans	444,000		428,000
Total allowance for loan losses	444,000	453,000	428,000	753,000	688,000	658,000
Impaired loans	0		0
Non-impaired loans	0		0
Total loans	0		0
Consumer, Excluding Consumer Other Portfolio Segment | 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	4,312,000		3,916,000
Total allowance for loan losses	4,312,000	3,940,000	3,916,000	3,560,000	3,407,000	3,222,000
Impaired loans	6,401,000		6,114,000
Non-impaired loans	737,200,000		593,824,000
Total loans	743,601,000		599,938,000
Consumer, Excluding Consumer Other Portfolio Segment | Home Equity
Financing Receivable, Allowance for Credit Losses [Line Items]
Allowance related to impaired loans	0		0
Allowance related to non-impaired loans	544,000		636,000
Total allowance for loan losses	544,000	539,000	636,000	545,000	419,000	340,000
Impaired loans	589,000		270,000
Non-impaired loans	79,631,000		77,129,000
Total loans	80,220,000		77,399,000
Consumer, Excluding Consumer Other Portfolio Segment | Commercial Real Estate
Financing Receivable, Allowance for Credit Losses [Line Items]
Allowance related to impaired loans	0		384,000
Allowance related to non-impaired loans	8,135,000		6,763,000
Total allowance for loan losses	8,135,000	7,622,000	7,147,000	5,220,000	4,568,000	3,551,000
Impaired loans	752,000		4,631,000
Non-impaired loans	660,715,000		556,572,000
Total loans	661,467,000		561,203,000
Consumer and Commercial Portfolio Segment | Construction
Financing Receivable, Allowance for Credit Losses [Line Items]
Allowance related to impaired loans	0		0
Allowance related to non-impaired loans	1,179,000		1,364,000
Total allowance for loan losses	1,179,000	1,747,000	1,364,000	722,000	1,024,000	1,056,000
Impaired loans	0		0
Non-impaired loans	71,641,000		79,773,000
Total loans	71,641,000		79,773,000
Commercial Portfolio Segment
Financing Receivable, Allowance for Credit Losses [Line Items]
Allowance related to impaired loans	0		10,000
Allowance related to non-impaired loans	2,650,000		2,829,000
Total allowance for loan losses	2,650,000	3,282,000	2,839,000	3,571,000	2,991,000	3,410,000
Impaired loans	70,000		10,000
Non-impaired loans	169,462,000		182,667,000
Total loans	169,532,000		182,677,000
Consumer Other Portfolio Segment
Financing Receivable, Allowance for Credit Losses [Line Items]
Allowance related to impaired loans	0		10,000
Allowance related to non-impaired loans	466,000		762,000
Total allowance for loan losses	466,000	$ 496,000	772,000	$ 711,000	$ 680,000	$ 736,000
Impaired loans	178,000		145,000
Non-impaired loans	30,747,000		38,041,000
Total loans	$ 30,925,000		$ 38,186,000

Loans and The Allowance for L43

Loans and The Allowance for Loan Losses - Summary of Past Due and Non-accrual loans, by class (Details) - USD ($) $ in Thousands	Sep. 30, 2016	Dec. 31, 2015
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	$ 8,241	$ 5,978
Loans on Non-accrual	7,849	10,744
30-59 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	4,273	3,344
60-89 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	1,698	1,348
Past Due 90 Days or More
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	2,270	1,286
Consumer, Excluding Consumer Other Portfolio Segment | 1-4 Family Residential
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	4,499	3,277
Loans on Non-accrual	6,260	5,688
Consumer, Excluding Consumer Other Portfolio Segment | Home Equity
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	1,476	1,226
Loans on Non-accrual	589	270
Consumer, Excluding Consumer Other Portfolio Segment | Commercial Real Estate
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	752	1,249
Loans on Non-accrual	752	4,631
Consumer, Excluding Consumer Other Portfolio Segment | 30-59 Days Past Due | 1-4 Family Residential
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	2,176	2,287
Consumer, Excluding Consumer Other Portfolio Segment | 30-59 Days Past Due | Home Equity
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	693	1,031
Consumer, Excluding Consumer Other Portfolio Segment | 30-59 Days Past Due | Commercial Real Estate
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	0	0
Consumer, Excluding Consumer Other Portfolio Segment | 60-89 Days Past Due | 1-4 Family Residential
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	1,311	0
Consumer, Excluding Consumer Other Portfolio Segment | 60-89 Days Past Due | Home Equity
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	387	19
Consumer, Excluding Consumer Other Portfolio Segment | 60-89 Days Past Due | Commercial Real Estate
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	0	1,249
Consumer, Excluding Consumer Other Portfolio Segment | Past Due 90 Days or More | 1-4 Family Residential
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	1,012	990
Consumer, Excluding Consumer Other Portfolio Segment | Past Due 90 Days or More | Home Equity
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	396	176
Consumer, Excluding Consumer Other Portfolio Segment | Past Due 90 Days or More | Commercial Real Estate
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	752	0
Commercial Portfolio Segment
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	43	23
Loans on Non-accrual	70	10
Commercial Portfolio Segment | 30-59 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	15	23
Commercial Portfolio Segment | 60-89 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	0	0
Commercial Portfolio Segment | Past Due 90 Days or More
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	28	0
Construction Portfolio Segment
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	981
Loans on Non-accrual	0
Construction Portfolio Segment | 30-59 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	981
Construction Portfolio Segment | 60-89 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	0
Construction Portfolio Segment | Past Due 90 Days or More
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	0
Consumer Other Portfolio Segment
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	490	203
Loans on Non-accrual	178	145
Consumer Other Portfolio Segment | 30-59 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	408	3
Consumer Other Portfolio Segment | 60-89 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	0	80
Consumer Other Portfolio Segment | Past Due 90 Days or More
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	$ 82	$ 120

Loans and The Allowance for L44

Loans and The Allowance for Loan Losses - Summary of Impaired Loans (Details) - USD ($) $ in Thousands	Sep. 30, 2016	Dec. 31, 2015
Recorded Investment
Recorded Investment, without valuation allowance		$ 6,419
Recorded Investment, with a valuation allowance		4,751
Recorded Investment, total	$ 7,990	11,170
Unpaid Principal Balance
Unpaid Principal Balance, without a valuation allowance		7,288
Unpaid Principal Balance, with a valuation allowance		4,752
Unpaid Principal Balance, total	12,175	12,040
Related Allowance	0	404
Commercial Real Estate
Recorded Investment
Recorded Investment, with a valuation allowance		4,631
Unpaid Principal Balance
Unpaid Principal Balance, with a valuation allowance		4,631
Related Allowance		384
Commercial Portfolio Segment
Unpaid Principal Balance
Related Allowance		10
Consumer
Unpaid Principal Balance
Related Allowance		10
Consumer, Excluding Consumer Other Portfolio Segment | 1-4 Family Residential
Recorded Investment
Recorded Investment, without valuation allowance	6,401	6,114
Unpaid Principal Balance
Unpaid Principal Balance, without a valuation allowance	7,011	6,824
Consumer, Excluding Consumer Other Portfolio Segment | Home Equity
Recorded Investment
Recorded Investment, without valuation allowance	589	270
Unpaid Principal Balance
Unpaid Principal Balance, without a valuation allowance	764	425
Consumer, Excluding Consumer Other Portfolio Segment | Commercial Real Estate
Recorded Investment
Recorded Investment, without valuation allowance	752
Unpaid Principal Balance
Unpaid Principal Balance, without a valuation allowance	1,073
Commercial Portfolio Segment
Recorded Investment
Recorded Investment, without valuation allowance	70
Recorded Investment, with a valuation allowance		10
Unpaid Principal Balance
Unpaid Principal Balance, without a valuation allowance	3,140
Unpaid Principal Balance, with a valuation allowance		11
Consumer Other Portfolio Segment
Recorded Investment
Recorded Investment, without valuation allowance	178	35
Recorded Investment, with a valuation allowance		110
Unpaid Principal Balance
Unpaid Principal Balance, without a valuation allowance	$ 187	39
Unpaid Principal Balance, with a valuation allowance		$ 110

Loans and The Allowance for L45

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, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Financing Receivable, Impaired [Line Items]
Average Recorded Investment	$ 11,676	$ 5,371	$ 11,470	$ 5,272
Interest Income Recognized	240	60	521	219
Consumer, Excluding Consumer Other Portfolio Segment | 1-4 Family Residential
Financing Receivable, Impaired [Line Items]
Average Recorded Investment	6,445	4,559	6,383	4,558
Interest Income Recognized	186	53	331	196
Consumer, Excluding Consumer Other Portfolio Segment | Home Equity
Financing Receivable, Impaired [Line Items]
Average Recorded Investment	520	717	405	652
Interest Income Recognized	5	6	13	20
Consumer, Excluding Consumer Other Portfolio Segment | Commercial Real Estate
Financing Receivable, Impaired [Line Items]
Average Recorded Investment	3,037		3,755
Interest Income Recognized	41		135
Consumer Other Portfolio Segment
Financing Receivable, Impaired [Line Items]
Average Recorded Investment	136	95	156	62
Interest Income Recognized	2	$ 1	6	$ 3
Commercial Portfolio Segment
Financing Receivable, Impaired [Line Items]
Average Recorded Investment	1,538		771
Interest Income Recognized	$ 6		$ 36

Loans and The Allowance for L46

Loans and The Allowance for Loan Losses - Summary of Loan by Risk Rating (Details) - USD ($) $ in Thousands	Sep. 30, 2016	Dec. 31, 2015
Financing Receivable, Recorded Investment [Line Items]
Total loans	$ 1,757,386	$ 1,539,176
Loans rated 1 - 6
Financing Receivable, Recorded Investment [Line Items]
Total loans	879,247	812,346
Loans rated 7
Financing Receivable, Recorded Investment [Line Items]
Total loans	23,378	13,421
Loans rated 8
Financing Receivable, Recorded Investment [Line Items]
Total loans	8,248	6,963
Loans rated 9
Financing Receivable, Recorded Investment [Line Items]
Total loans	648	712
Loans rated 10
Financing Receivable, Recorded Investment [Line Items]
Total loans	0	0
Loans not rated
Financing Receivable, Recorded Investment [Line Items]
Total loans	845,865	705,734
Consumer, Excluding Consumer Other Portfolio Segment
Financing Receivable, Recorded Investment [Line Items]
Total loans	1,556,929	1,318,313
Consumer, Excluding Consumer Other Portfolio Segment | 1-4 Family Residential
Financing Receivable, Recorded Investment [Line Items]
Total loans	743,601	599,938
Consumer, Excluding Consumer Other Portfolio Segment | Home Equity
Financing Receivable, Recorded Investment [Line Items]
Total loans	80,220	77,399
Consumer, Excluding Consumer Other Portfolio Segment | Commercial Real Estate
Financing Receivable, Recorded Investment [Line Items]
Total loans	661,467	561,203
Consumer, Excluding Consumer Other Portfolio Segment | Loans rated 1 - 6 | 1-4 Family Residential
Financing Receivable, Recorded Investment [Line Items]
Total loans	1,062	1,950
Consumer, Excluding Consumer Other Portfolio Segment | Loans rated 1 - 6 | Home Equity
Financing Receivable, Recorded Investment [Line Items]
Total loans	295	465
Consumer, Excluding Consumer Other Portfolio Segment | Loans rated 1 - 6 | Commercial Real Estate
Financing Receivable, Recorded Investment [Line Items]
Total loans	644,198	548,360
Consumer, Excluding Consumer Other Portfolio Segment | Loans rated 7 | 1-4 Family Residential
Financing Receivable, Recorded Investment [Line Items]
Total loans	4,033	4,461
Consumer, Excluding Consumer Other Portfolio Segment | Loans rated 7 | Home Equity
Financing Receivable, Recorded Investment [Line Items]
Total loans	504	321
Consumer, Excluding Consumer Other Portfolio Segment | Loans rated 7 | Commercial Real Estate
Financing Receivable, Recorded Investment [Line Items]
Total loans	11,242	7,765
Consumer, Excluding Consumer Other Portfolio Segment | Loans rated 8 | 1-4 Family Residential
Financing Receivable, Recorded Investment [Line Items]
Total loans	2,003	1,592
Consumer, Excluding Consumer Other Portfolio Segment | Loans rated 8 | Home Equity
Financing Receivable, Recorded Investment [Line Items]
Total loans	144	144
Consumer, Excluding Consumer Other Portfolio Segment | Loans rated 8 | Commercial Real Estate
Financing Receivable, Recorded Investment [Line Items]
Total loans	6,027	5,078
Consumer, Excluding Consumer Other Portfolio Segment | Loans rated 9 | 1-4 Family Residential
Financing Receivable, Recorded Investment [Line Items]
Total loans	648	701
Consumer, Excluding Consumer Other Portfolio Segment | Loans rated 9 | Home Equity
Financing Receivable, Recorded Investment [Line Items]
Total loans	0	0
Consumer, Excluding Consumer Other Portfolio Segment | Loans rated 9 | Commercial Real Estate
Financing Receivable, Recorded Investment [Line Items]
Total loans	0	0
Consumer, Excluding Consumer Other Portfolio Segment | Loans rated 10 | 1-4 Family Residential
Financing Receivable, Recorded Investment [Line Items]
Total loans	0	0
Consumer, Excluding Consumer Other Portfolio Segment | Loans rated 10 | Home Equity
Financing Receivable, Recorded Investment [Line Items]
Total loans	0	0
Consumer, Excluding Consumer Other Portfolio Segment | Loans rated 10 | Commercial Real Estate
Financing Receivable, Recorded Investment [Line Items]
Total loans	0	0
Consumer, Excluding Consumer Other Portfolio Segment | Loans not rated | 1-4 Family Residential
Financing Receivable, Recorded Investment [Line Items]
Total loans	735,855	591,234
Consumer, Excluding Consumer Other Portfolio Segment | Loans not rated | Home Equity
Financing Receivable, Recorded Investment [Line Items]
Total loans	79,277	76,469
Consumer, Excluding Consumer Other Portfolio Segment | Loans not rated | Commercial Real Estate
Financing Receivable, Recorded Investment [Line Items]
Total loans	0	0
Consumer and Commercial Portfolio Segment | Construction
Financing Receivable, Recorded Investment [Line Items]
Total loans	71,641	79,773
Consumer and Commercial Portfolio Segment | Loans rated 1 - 6 | Construction
Financing Receivable, Recorded Investment [Line Items]
Total loans	71,641	79,773
Consumer and Commercial Portfolio Segment | Loans rated 7 | Construction
Financing Receivable, Recorded Investment [Line Items]
Total loans	0	0
Consumer and Commercial Portfolio Segment | Loans rated 8 | Construction
Financing Receivable, Recorded Investment [Line Items]
Total loans	0	0
Consumer and Commercial Portfolio Segment | Loans rated 9 | Construction
Financing Receivable, Recorded Investment [Line Items]
Total loans		0
Consumer and Commercial Portfolio Segment | Loans rated 10 | Construction
Financing Receivable, Recorded Investment [Line Items]
Total loans	0	0
Consumer and Commercial Portfolio Segment | Loans not rated | Construction
Financing Receivable, Recorded Investment [Line Items]
Total loans	0	0
Commercial Portfolio Segment
Financing Receivable, Recorded Investment [Line Items]
Total loans	169,532	182,677
Commercial Portfolio Segment | Loans rated 1 - 6
Financing Receivable, Recorded Investment [Line Items]
Total loans	162,047	181,792
Commercial Portfolio Segment | Loans rated 7
Financing Receivable, Recorded Investment [Line Items]
Total loans	7,442	874
Commercial Portfolio Segment | Loans rated 8
Financing Receivable, Recorded Investment [Line Items]
Total loans	43	0
Commercial Portfolio Segment | Loans rated 9
Financing Receivable, Recorded Investment [Line Items]
Total loans	0	11
Commercial Portfolio Segment | Loans rated 10
Financing Receivable, Recorded Investment [Line Items]
Total loans	0	0
Commercial Portfolio Segment | Loans not rated
Financing Receivable, Recorded Investment [Line Items]
Total loans	0	0
Consumer Other Portfolio Segment
Financing Receivable, Recorded Investment [Line Items]
Total loans	30,925	38,186
Consumer Other Portfolio Segment | Loans rated 1 - 6
Financing Receivable, Recorded Investment [Line Items]
Total loans	4	6
Consumer Other Portfolio Segment | Loans rated 7
Financing Receivable, Recorded Investment [Line Items]
Total loans	157	0
Consumer Other Portfolio Segment | Loans rated 8
Financing Receivable, Recorded Investment [Line Items]
Total loans	31	149
Consumer Other Portfolio Segment | Loans rated 9
Financing Receivable, Recorded Investment [Line Items]
Total loans	0	0
Consumer Other Portfolio Segment | Loans rated 10
Financing Receivable, Recorded Investment [Line Items]
Total loans	0	0
Consumer Other Portfolio Segment | Loans not rated
Financing Receivable, Recorded Investment [Line Items]
Total loans	$ 30,733	$ 38,031

Derivatives - Derivative Financ

Derivatives - Derivative Financial Instruments Not Designated as hedging Instruments (Details) - Not Designated as Hedging Instrument - USD ($) $ in Thousands	Sep. 30, 2016	Dec. 31, 2015
Derivatives, Fair Value [Line Items]
Derivative Gains, notional amount	$ 395,719	$ 290,846
Derivative Gains, fair value	18,816	7,962
Derivative Losses, notional amount	407,589	295,244
Derivative Losses, fair value	20,033	8,489
Commercial loan level interest rate swap agreements
Derivatives, Fair Value [Line Items]
Derivative Gains, notional amount	379,736	282,546
Derivative Gains, fair value	18,783	7,956
Derivative Losses, notional amount	379,736	282,546
Derivative Losses, fair value	19,893	8,411
Other contracts
Derivatives, Fair Value [Line Items]
Derivative Gains, notional amount	15,983	8,300
Derivative Gains, fair value	33	6
Derivative Losses, notional amount	27,853	12,698
Derivative Losses, fair value	$ 140	$ 78

Derivatives (Narrative) (Detail

Derivatives (Narrative) (Details) - Not Designated as Hedging Instrument - USD ($)	Sep. 30, 2016	Dec. 31, 2015
Derivative [Line Items]
Notional amount	$ 395,719,000	$ 290,846,000
Derivative Gains, fair value	18,816,000	7,962,000
Derivative Losses, fair value	20,033,000	$ 8,489,000
Mortgage loan commitments
Derivative [Line Items]
Notional amount	6,400,000
Derivative Gains, fair value	129,000
Forward loan sale commitments
Derivative [Line Items]
Notional amount	8,500,000
Derivative Gains, fair value	19,000
Derivative Losses, fair value	$ 35,000

Deposits - Summary of Deposit B

Deposits - Summary of Deposit Balances (Details) - USD ($) $ in Thousands	Sep. 30, 2016	Dec. 31, 2015
Banking and Thrift [Abstract]
NOW and demand	$ 337,225	$ 288,143
Regular savings	270,067	287,344
Money market	518,360	368,050
Brokered money market	46,235	41,807
Total non-certificate accounts	1,171,887	985,344
Term certificates of $250,000 or more	79,815	65,364
Term certificates less than $250,000	259,249	246,614
Brokered term certificates	170,506	136,527
Total term certificate accounts	509,570	448,505
Total deposits	$ 1,681,457	$ 1,433,849

Deposits - Schedule of Contract

Deposits - Schedule of Contractual Maturities (Details) - USD ($) $ in Thousands	Sep. 30, 2016	Dec. 31, 2015
Time Deposits, Fiscal Year Maturity [Abstract]
Amount - Within 1 year	$ 285,918
Amount - 1-2 years	96,686
Amount - 2-3 years	46,631
Amount - 3-4 years	59,640
Amount - 4 years and beyond	20,695
Total term certificate accounts	$ 509,570	$ 448,505
Weighted Average Rate of Time Deposits [Abstract]
Weighted Average Rate - Within 1 year	0.66%
Weighted Average Rate - 1-2 years	1.26%
Weighted Average Rate - 2-3 years	1.47%
Weighted Average Rate - 3-4 years	1.98%
Weighted Average Rate - 4 years and beyond	1.79%
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, 2016	Dec. 31, 2015
Assets
Debt securities	$ 165,951	$ 184,114
Marketable equity securities	44,322	47,576
Recurring
Assets
Debt securities	165,951	184,114
Marketable equity securities	44,322	47,576
Interest rate swap agreements		7,962
Total assets	229,237	239,652
Liabilities
Interest rate swap agreements	20,068	8,489
Recurring | Level 1
Assets
Debt securities	0	0
Marketable equity securities	44,322	47,576
Interest rate swap agreements		0
Total assets	44,322	47,576
Liabilities
Interest rate swap agreements	0	0
Recurring | Level 2
Assets
Debt securities	165,951	184,114
Marketable equity securities	0	0
Interest rate swap agreements		7,962
Total assets	184,767	192,076
Liabilities
Interest rate swap agreements	20,033	8,489
Recurring | Level 3
Assets
Debt securities	0	0
Marketable equity securities	0	0
Interest rate swap agreements		0
Total assets	148	0
Liabilities
Interest rate swap agreements	35	0
Interest rate swap agreements | Level 1
Assets
Interest rate swap agreements	0	0
Liabilities
Interest rate swap agreements	0	0
Interest rate swap agreements | Level 2
Assets
Interest rate swap agreements	18,816	7,962
Liabilities
Interest rate swap agreements	20,033	8,489
Interest rate swap agreements | Level 3
Assets
Interest rate swap agreements	0	0
Liabilities
Interest rate swap agreements	0	$ 0
Interest rate swap agreements | Recurring
Assets
Interest rate swap agreements	18,816
Liabilities
Interest rate swap agreements	20,033
Interest rate swap agreements | Recurring | Level 1
Assets
Interest rate swap agreements	0
Liabilities
Interest rate swap agreements	0
Interest rate swap agreements | Recurring | Level 2
Assets
Interest rate swap agreements	18,816
Liabilities
Interest rate swap agreements	20,033
Interest rate swap agreements | Recurring | Level 3
Assets
Interest rate swap agreements	0
Liabilities
Interest rate swap agreements	0
Forward loan sale commitments | Level 1
Assets
Interest rate swap agreements	0
Liabilities
Interest rate swap agreements	0
Forward loan sale commitments | Level 2
Assets
Interest rate swap agreements	0
Liabilities
Interest rate swap agreements	0
Forward loan sale commitments | Level 3
Assets
Interest rate swap agreements	19
Liabilities
Interest rate swap agreements	35
Forward loan sale commitments | Recurring
Assets
Interest rate swap agreements	19
Liabilities
Interest rate swap agreements	35
Forward loan sale commitments | Recurring | Level 1
Assets
Interest rate swap agreements	0
Liabilities
Interest rate swap agreements	0
Forward loan sale commitments | Recurring | Level 2
Assets
Interest rate swap agreements	0
Liabilities
Interest rate swap agreements	0
Forward loan sale commitments | Recurring | Level 3
Assets
Interest rate swap agreements	19
Liabilities
Interest rate swap agreements	35
Mortgage loan commitments | Level 1
Assets
Interest rate swap agreements	0
Mortgage loan commitments | Level 2
Assets
Interest rate swap agreements	0
Mortgage loan commitments | Level 3
Assets
Interest rate swap agreements	129
Mortgage loan commitments | Recurring
Assets
Interest rate swap agreements	129
Mortgage loan commitments | Recurring | Level 1
Assets
Interest rate swap agreements	0
Mortgage loan commitments | Recurring | Level 2
Assets
Interest rate swap agreements	0
Mortgage loan commitments | Recurring | Level 3
Assets
Interest rate swap agreements	$ 129

Fair Value Measurements - Ass52

Fair Value Measurements - Assets and Liabilities Measured at Fair Value on a Nonrecurring Basis (Details) - Nonrecurring - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015	Dec. 31, 2015
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Impaired loans	$ (2,690)	$ 0	$ (2,997)	$ 0
Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Impaired loans	0		0		$ 0
Total assets	0		0		0
Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Impaired loans	0		0		0
Total assets	0		0		0
Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Impaired loans	812		812		4,752
Total assets	$ 812		$ 812		$ 4,752

Fair Value Measurements - Summa

Fair Value Measurements - Summary of Fair Value, Balance Sheet Grouping (Details) - USD ($) $ in Thousands	Sep. 30, 2016	Dec. 31, 2015
Financial assets:
Securities available for sale	$ 210,273	$ 231,690
Securities held to maturity	197,863	200,141
Estimate of Fair Value Measurement
Financial assets:
Cash and cash equivalents	37,002	33,298
Securities available for sale	210,273	231,690
Securities held to maturity	199,929	199,226
Federal Home Loan Bank stock	13,505	13,567
Loans and loans held for sale	1,752,000	1,538,809
Accrued interest receivable	5,388	5,344
Financial liabilities:
Deposits	1,684,592	1,434,179
Borrowings	209,099	260,244
Carrying Amount
Financial assets:
Cash and cash equivalents	37,002	33,298
Securities available for sale	210,273	231,690
Securities held to maturity	197,863	200,141
Federal Home Loan Bank stock	13,505	13,567
Loans and loans held for sale	1,743,624	1,536,152
Accrued interest receivable	5,388	5,344
Financial liabilities:
Deposits	1,681,457	1,433,849
Borrowings	208,700	260,000
Level 1
Financial assets:
Cash and cash equivalents	37,002	33,298
Securities available for sale	44,322	47,576
Securities held to maturity	605	634
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	165,951	184,114
Securities held to maturity	199,324	198,592
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	209,099	260,244
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	13,505	13,567
Loans and loans held for sale	1,752,000	1,538,809
Accrued interest receivable	5,388	5,344
Financial liabilities:
Deposits	1,684,592	1,434,179
Borrowings	0	0
Interest Rate Swap | Estimate of Fair Value Measurement
Financial liabilities:
Derivative assets:	18,816	7,962
Derivative liabilities:	20,033	8,489
Interest Rate Swap | Carrying Amount
Financial liabilities:
Derivative assets:	18,816	7,962
Derivative liabilities:	20,033	8,489
Interest Rate Swap | Level 1
Financial liabilities:
Derivative assets:	0	0
Derivative liabilities:	0	0
Interest Rate Swap | Level 2
Financial liabilities:
Derivative assets:	18,816	7,962
Derivative liabilities:	20,033	8,489
Interest Rate Swap | Level 3
Financial liabilities:
Derivative assets:	0	0
Derivative liabilities:	0	$ 0
Forward loan sale commitments | Estimate of Fair Value Measurement
Financial liabilities:
Derivative assets:	19
Derivative liabilities:	35
Forward loan sale commitments | Carrying Amount
Financial liabilities:
Derivative assets:	19
Derivative liabilities:	35
Forward loan sale commitments | Level 1
Financial liabilities:
Derivative assets:	0
Derivative liabilities:	0
Forward loan sale commitments | Level 2
Financial liabilities:
Derivative assets:	0
Derivative liabilities:	0
Forward loan sale commitments | Level 3
Financial liabilities:
Derivative assets:	19
Derivative liabilities:	35
Mortgage loan commitments | Estimate of Fair Value Measurement
Financial liabilities:
Derivative assets:	129
Mortgage loan commitments | Carrying Amount
Financial liabilities:
Derivative assets:	129
Mortgage loan commitments | Level 1
Financial liabilities:
Derivative assets:	0
Mortgage loan commitments | Level 2
Financial liabilities:
Derivative assets:	0
Mortgage loan commitments | Level 3
Financial liabilities:
Derivative assets:	$ 129

Comprehensive Income - Componen

Comprehensive Income - Components of Accumulated Other Comprehensive Income (Details) - USD ($) $ in Thousands	Sep. 30, 2016	Dec. 31, 2015
Accumulated Other Comprehensive Income (Loss) [Line Items]
Accumulated other comprehensive income	$ 153	$ (5,188)
Accumulated Defined Benefit Plans Adjustment, Net Unamortized Gain (Loss)
Accumulated Other Comprehensive Income (Loss) [Line Items]
Net unrealized actuarial gain (loss)	(2,654)	(2,858)
Tax effect	980	1,052
Accumulated other comprehensive income	(1,674)	(1,806)
Securities Available for Sale | Accumulated Net Investment Gain (Loss)
Accumulated Other Comprehensive Income (Loss) [Line Items]
Net unrealized actuarial gain (loss)	2,487	(5,701)
Tax effect	(913)	1,945
Accumulated other comprehensive income	1,574	(3,756)
Securities Held to Maturity | Accumulated Net Investment Gain (Loss)
Accumulated Other Comprehensive Income (Loss) [Line Items]
Net unrealized actuarial gain (loss)	383	571
Tax effect	(130)	(197)
Accumulated other comprehensive income	$ 253	$ 374

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, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning balance				$ 398,829	$ 411,606
Unrealized gains on securities reclassified as held to maturity		$ 0	$ (666)	0	(666)
Amortization of amounts previously recorded upon transfer from available for sale	[1]	(39)	(35)	(188)	(35)
Other comprehensive income (loss)		1,085	(3,123)	5,341	(4,501)
Ending balance		389,689	407,612	389,689	407,612
Accumulated other comprehensive income (loss)
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning balance		(932)	1,199	(5,188)	2,577
Other comprehensive income before reclassification adjustments		2,198	(4,504)	9,125	(5,135)
Net realized gains		(562)	(238)	(937)	(1,823)
Amortization of actuarial losses		68	27	204	83
Unrealized gains on securities reclassified as held to maturity			0		0
Amortization of amounts previously recorded upon transfer from available for sale		(39)	(35)	(188)	(35)
Tax effects		(580)	1,627	(2,863)	2,409
Other comprehensive income (loss)		1,085	(3,123)	5,341	(4,501)
Ending balance		153	(1,924)	153	(1,924)
Defined Benefit Pension Plan
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning balance		(1,718)	(781)	(1,806)	(815)
Other comprehensive income before reclassification adjustments		0	0	0	0
Net realized gains		0	0	0	0
Amortization of actuarial losses		68	27	204	83
Amortization of amounts previously recorded upon transfer from available for sale		0	0	0	0
Tax effects		(24)	(8)	(72)	(30)
Other comprehensive income (loss)		44	19	132	53
Ending balance		(1,674)	(762)	(1,674)	(762)
Securities Available for Sale | Accumulated Net Investment Gain (Loss)
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning balance		508	1,980	(3,756)	3,392
Other comprehensive income before reclassification adjustments		2,198	(4,504)	9,125	(5,135)
Net realized gains		(562)	(238)	(937)	(1,823)
Unrealized gains on securities reclassified as held to maturity			(666)		(666)
Amortization of amounts previously recorded upon transfer from available for sale		0	0	0	0
Tax effects		(570)	1,887	(2,858)	2,691
Other comprehensive income (loss)		1,066	(3,521)	5,330	(4,933)
Ending balance		1,574	(1,541)	1,574	(1,541)
Securities Held to Maturity | Accumulated Net Investment Gain (Loss)
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning balance		278	0	374	0
Other comprehensive income before reclassification adjustments		0	0	0	0
Net realized gains		0	0	0	0
Unrealized gains on securities reclassified as held to maturity			666		666
Amortization of amounts previously recorded upon transfer from available for sale		(39)	(35)	(188)	(35)
Tax effects		14	(252)	67	(252)
Other comprehensive income (loss)		(25)	379	(121)	379
Ending balance		$ 253	$ 379	$ 253	$ 379
[1]	Amounts are included in interest income on securities in the consolidated statements of net income.

Stockholders' Equity (Details)

Stockholders' Equity (Details) - USD ($) $ in Thousands	Sep. 30, 2016	Dec. 31, 2015	Jan. 01, 2015	Dec. 31, 2014
Capital [Abstract]
Actual - Total Capital to Risk Weighted Assets	$ 394,035	$ 407,444
Actual - Total Capital to Risk Weighted Assets Ratio (percentage)	21.70%	24.80%
Minimum Capital Requirement - Total Capital	$ 145,244	$ 131,231
Minimum Capital Requirement - Total Capital to Risk Weighted Assets Ratio (percentage)	8.00%	8.00%
Minimum to Be Well Capitalized - Total Capital	$ 181,555	$ 164,039
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	$ 376,305	$ 390,342
Actual - Tier 1 Capital to Risk Weighted Assets Ratio (percentage)	20.70%	23.80%
Minimum Capital Requirement - Tier 1 Capital to Risk Weighted Assets	$ 108,933	$ 98,423
Minimum Capital Requirement - Tier 1 Capital to Risk Weighted Assets Ratio (percentage)	6.00%	6.00%	6.00%	4.00%
Minimum to Be Well Capitalized - Tier 1 Capital to Risk Weighted Assets	$ 145,244	$ 131,231
Minimum to Be Well Capitalized - Tier 1 Capital to Risk Weighted Assets Ratio (percentage)	8.00%	8.00%
Common Equity Risk Based Capital [Abstract]
Actual - Common Equity to Risk Weighted Assets	$ 376,305	$ 390,342
Actual - Common Equity to Risk Weighted Assets Ratio (percentage)	20.70%	23.80%
Minimum Capital Requirement - Common Equity to Risk Weighted Assets	$ 81,700	$ 73,818
Minimum Capital Requirement - Common Equity to Risk Weighted Assets Ratio (percentage)	4.50%	4.50%
Minimum to Be Well Capitalized - Common Equity to Risk Weighted Assets	$ 118,011	$ 106,625
Minimum to Be Well Capitalized - Common Equity to Risk Weighted Assets Ratio (percentage)	6.50%	6.50%
Tier One Leverage Capital [Abstract]
Actual - Tier 1 Capital to Average Assets	$ 376,305	$ 390,342
Actual - Tier 1 Capital to Average Assets Ratio (percentage)	16.70%	19.60%
Minimum Capital Requirement - Tier 1 Capital to Average Assets	$ 90,155	$ 79,658
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	$ 112,693	$ 99,573
Minimum to Be Well Capitalized - Tier 1 Capital to Average Assets Ratio (percentage)	5.00%	5.00%
Blue Hills Bank
Capital [Abstract]
Actual - Total Capital to Risk Weighted Assets	$ 308,013	$ 296,309
Actual - Total Capital to Risk Weighted Assets Ratio (percentage)	17.00%	18.10%
Minimum Capital Requirement - Total Capital	$ 144,952	$ 130,832
Minimum Capital Requirement - Total Capital to Risk Weighted Assets Ratio (percentage)	8.00%	8.00%
Minimum to Be Well Capitalized - Total Capital	$ 181,190	$ 163,540
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	$ 290,283	$ 279,207
Actual - Tier 1 Capital to Risk Weighted Assets Ratio (percentage)	16.00%	17.10%
Minimum Capital Requirement - Tier 1 Capital to Risk Weighted Assets	$ 108,714	$ 98,124
Minimum Capital Requirement - Tier 1 Capital to Risk Weighted Assets Ratio (percentage)	6.00%	6.00%
Minimum to Be Well Capitalized - Tier 1 Capital to Risk Weighted Assets	$ 144,952	$ 130,832
Minimum to Be Well Capitalized - Tier 1 Capital to Risk Weighted Assets Ratio (percentage)	8.00%	8.00%
Common Equity Risk Based Capital [Abstract]
Actual - Common Equity to Risk Weighted Assets	$ 290,283	$ 279,207
Actual - Common Equity to Risk Weighted Assets Ratio (percentage)	16.00%	17.10%
Minimum Capital Requirement - Common Equity to Risk Weighted Assets	$ 81,536	$ 73,593
Minimum Capital Requirement - Common Equity to Risk Weighted Assets Ratio (percentage)	4.50%	4.50%
Minimum to Be Well Capitalized - Common Equity to Risk Weighted Assets	$ 117,774	$ 106,301
Minimum to Be Well Capitalized - Common Equity to Risk Weighted Assets Ratio (percentage)	6.50%	6.50%
Tier One Leverage Capital [Abstract]
Actual - Tier 1 Capital to Average Assets	$ 290,283	$ 279,207
Actual - Tier 1 Capital to Average Assets Ratio (percentage)	12.90%	14.00%
Minimum Capital Requirement - Tier 1 Capital to Average Assets	$ 90,127	$ 79,867
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	$ 112,659	$ 99,608
Minimum to Be Well Capitalized - Tier 1 Capital to Average Assets Ratio (percentage)	5.00%	5.00%

Stockholders' Equity - Addition

Stockholders' Equity - Additional Information (Details)	9 Months Ended
	Sep. 30, 2016	Dec. 31, 2015	Jan. 01, 2015	Dec. 31, 2014
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%	6.00%	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%
Capital conservation buffer, phase in period (years)	3 years

Employee Stock Ownership Plan -

Employee Stock Ownership Plan - Employee Stock Ownership Plan (Details) - shares	Sep. 30, 2016	Dec. 31, 2015
Compensation and Retirement Disclosure [Abstract]
Allocated	150,229	75,912
Committed to be allocated	56,986	75,912
Unallocated	2,068,533	2,124,846
Total	2,275,748	2,276,670

Employee Stock Ownership Plan59

Employee Stock Ownership Plan - Additional information (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015	Dec. 31, 2015
Compensation and Retirement Disclosure [Abstract]
ESOP, Number of shares committed to be released annually	75,912		75,912
Fair Value of unallocated shares	$ 31,100		$ 31,100		$ 32,500
ESOP expense	$ 277	$ 274	$ 818	$ 782

Earnings Per Common Share (Deta

Earnings Per Common Share (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Earnings Per Share [Abstract]
Net income applicable to common stock	$ 1,630	$ 1,810	$ 4,655	$ 4,815
Average number of common shares outstanding	26,207,612	28,337,603	26,682,260	28,423,110
Less: Average unallocated ESOP shares	(2,078,100)	(2,154,222)	(2,096,690)	(2,173,045)
Average number of common shares outstanding used to calculate basic earnings per common share	24,129,512	26,183,381	24,585,570	26,250,065
Effect of dilutive unvested restricted stock awards (in shares)	178,028	0	122,989	0
Average number of common shares outstanding used to calculate diluted earnings per common share	24,307,540	26,183,381	24,708,559	26,250,065
Basic (dollars per share)	$ 0.07	$ 0.07	$ 0.19	$ 0.18
Diluted (dollars per share)	$ 0.07	$ 0.07	$ 0.19	$ 0.18
Antidilutive securities excluded from computation of earnings per share (shares)	2,461,350		2,461,350

Share-Based Compensation - Addi

Share-Based Compensation - Additional Information (Details) - USD ($)	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Stock Options
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of shares authorized	2,846,681		2,846,681
Expected life (years)			6 years 6 months
Vesting period (years)			5 years
Share-based compensation expense	$ 513,000	$ 0	$ 1,509,000	$ 0
Tax benefit related to share-based compensation expense	$ 126,000		$ 376,000
Restricted Stock
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of shares authorized	1,138,673		1,138,673
Share-based compensation expense	$ 712,000	$ 0	$ 2,097,000	$ 0
Tax benefit related to share-based compensation expense	$ 249,000		$ 738,000
Granted (shares)			31,450
Performance Shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Granted (shares)			40,000
Maximum | Stock Options
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Expected life (years)			10 years

Share-Based Compensation - Fair

Share-Based Compensation - Fair Value Assumptions (Details) - $ / shares	9 Months Ended
	Sep. 30, 2016	Dec. 31, 2015
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Options granted (shares)	2,461,350	2,434,000
Stock Options
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Options granted (shares)	55,000
Vesting period (years)	5 years
Expected volatility (percent)	28.47%
Expected life (years)	6 years 6 months
Expected dividend yield (percent)	0.58%
Risk free interest rate (percent)	1.38%
Fair value per option (dollars per share)	$ 4.02

Share-Based Compensation - Stoc

Share-Based Compensation - Stock Option Activity (Details) - USD ($)	9 Months Ended	12 Months Ended
	Sep. 30, 2016	Dec. 31, 2015
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding [Roll Forward]
Beginning balance (shares)	2,434,000
Granted (shares)	55,000
Forfeited (shares)	(27,650)
Ending balance (shares)	2,461,350	2,434,000
Exercisable at end of period (shares)	0
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price [Abstract]
Beginning balance, weighted average exercise price (dollars per share)	$ 14.07
Granted, weighted average exercise price (dollars per share)	13.80
Forfeited, weighted average exercise price (dollars per share)	14.07
Ending balance, weighted average exercise price (dollars per share)	14.06	$ 14.07
Exercisable at end of period, weighted average exercise price (dollars per share)	$ 0
Share-based Compensation Arrangement by Share-based Payment Award, Options, Additional Disclosures [Abstract]
Outstanding, weighted average remaining contractual term (years)	9 years 11 days
Granted, weighted average remaining contractual term (years)
Outstanding, aggregate intrinsic value	$ 2,353,133	$ 0
Granted, aggregate intrinsic value	0
Exercisable, aggregate intrinsic value	$ 0
Stock Options
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding [Roll Forward]
Ending balance (shares)	55,000
Share-based Compensation Arrangement by Share-based Payment Award, Options, Additional Disclosures [Abstract]
Unrecognized compensation cost	$ 8,237,000
Weighted average remaining recognition period (years)	4 years 11 days

Share-Based Compensation - Rest

Share-Based Compensation - Restricted Stock Activity (Details) - Restricted Stock $ / shares in Units, $ in Thousands	9 Months Ended
	Sep. 30, 2016USD ($)$ / sharesshares
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward]
Beginning balance (shares) | shares	983,175
Granted (shares) | shares	31,450
Forfeited (shares) | shares	(9,400)
Ending balance (shares) | shares	1,005,225
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value [Abstract]
Beginning balance, weighted average exercise price (dollars per share) | $ / shares	$ 14.07
Granted, weighted average exercise price (dollars per share) | $ / shares	13.83
Forfeited, weighted average exercise price (dollars per share) | $ / shares	14.07
Ending balance, weighted average exercise price (dollars per share) | $ / shares	$ 14.06
Unrecognized compensation cost inclusive of directors' fees | $	$ 11,388
Weighted average remaining recognition period (years)	4 years 15 days