Blue Hills Bancorp (BHBK) 10-Q 5 May 17 2017 Q1 Quarterly report Financial data

Document and Entity Information

Document and Entity Information - shares	3 Months Ended
	Mar. 31, 2017	Apr. 30, 2017
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	Mar. 31, 2017
Document Fiscal Year Focus	2,017
Document Fiscal Period Focus	Q1
Amendment Flag	false
Entity Common Stock, Shares Outstanding		26,858,328

Consolidated Balance Sheets (un

Consolidated Balance Sheets (unaudited) - USD ($) $ in Thousands	Mar. 31, 2017	Dec. 31, 2016
Assets
Cash and due from banks	$ 15,594	$ 14,752
Short-term investments	19,555	15,744
Total cash and cash equivalents	35,149	30,496
Securities available for sale, at fair value	173,834	204,836
Securities held to maturity, at amortized cost	201,684	201,027
Federal Home Loan Bank stock, at cost	14,828	13,352
Loans held for sale	1,675	2,761
Loans, net of allowance for loan losses of $18,875 at March 31, 2017 and $18,750 at December 31, 2016	1,968,474	1,912,871
Premises and equipment, net	21,858	22,034
Accrued interest receivable	5,994	6,057
Goodwill	9,160	9,160
Core deposit intangible	1,153	1,400
Net deferred tax asset	8,751	10,146
Bank-owned life insurance	32,271	32,015
Other assets	21,779	23,537
Total assets	2,496,610	2,469,692
Deposits:
Non-interest bearing	190,506	184,982
Interest bearing	1,666,216	1,623,705
Total deposits	1,856,722	1,808,687
Short-term borrowings	118,000	146,000
Long-term debt	105,000	105,000
Accrued expenses and other liabilities	19,944	23,098
Total liabilities	2,099,666	2,082,785
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; 26,858,328 and 26,759,953 issued and outstanding at March 31, 2017 and December 31, 2016, respectively)	259	259
Additional paid-in capital	250,976	249,317
Unearned compensation-ESOP	(20,306)	(20,496)
Retained earnings	168,160	161,896
Accumulated other comprehensive loss	(2,145)	(4,069)
Total stockholders' equity	396,944	386,907
Total liabilities and stockholders' equity	$ 2,496,610	$ 2,469,692

Consolidated Balance Sheets (u3

Consolidated Balance Sheets (unaudited) (Parenthetical) - USD ($) $ in Thousands	Mar. 31, 2017	Dec. 31, 2016
Statement of Financial Position [Abstract]
Loans, net of allowance for loan losses of $18,875 at March 31, 2017 and $18,750 at December 31, 2016	$ 18,875	$ 18,750
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	26,858,328	26,759,953
Common stock, shares outstanding	26,858,328	26,759,953

Consolidated Statements of Net

Consolidated Statements of Net Income (unaudited) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
Interest and dividend income:
Interest and fees on loans	$ 17,382	$ 13,603
Interest on securities	2,210	2,295
Dividends	157	139
Other	32	26
Total interest and dividend income	19,781	16,063
Interest expense:
Interest on deposits	3,254	2,292
Interest on borrowings	646	570
Total interest expense	3,900	2,862
Net interest and dividend income	15,881	13,201
Provision (credit) for loan losses	57	(27)
Net interest and dividend income, after provision (credit) for loan losses	15,824	13,228
Non-interest income:
Deposit account fees	320	317
Interchange and ATM fees	348	347
Mortgage banking	740	244
Loan level derivative income	164	639
Loss on sales and calls of available-for-sale securities, net	(1,022)	(244)
Gain on exchange of investment in Northeast Retirement Services	5,947	0
Bank-owned life insurance income	257	257
Miscellaneous	62	(183)
Total non-interest income	6,816	1,377
Non-interest expense:
Salaries and employee benefits	7,563	6,885
Occupancy and equipment	2,115	1,619
Data processing	1,044	761
Professional fees	869	481
Advertising	367	532
FDIC deposit insurance	212	346
Directors’ fees	374	338
Amortization of core deposit intangible	247	342
Other general and administrative	609	764
Total non-interest expense	13,400	12,068
Income before income taxes	9,240	2,537
Provision for income taxes	1,753	870
Net income	$ 7,487	$ 1,667
Earnings per common share:
Basic (dollars per share)	$ 0.31	$ 0.07
Diluted (dollars per share)	$ 0.31	$ 0.07
Weighted average shares outstanding:
Basic (shares)	23,911,419	25,066,086
Diluted (shares)	24,275,665	25,132,441

Consolidated Statements of Comp

Consolidated Statements of Comprehensive Income (unaudited) - USD ($) $ in Thousands		3 Months Ended
		Mar. 31, 2017	Mar. 31, 2016
Statement of Comprehensive Income [Abstract]
Net income		$ 7,487	$ 1,667
Securities available for sale:
Change in unrealized holding gains		1,803	3,415
Reclassification adjustment for net losses realized in net income	[1]	1,022	289
Net change in unrealized gains		2,825	3,704
Tax effect		(904)	(1,294)
Net-of-tax amount		1,921	2,410
Securities held to maturity:
Reclassification adjustment for amortization of amounts previously recorded upon transfer from available for sale	[2]	(23)	(70)
Tax effect		(4)	25
Net-of-tax amount		(27)	(45)
Defined benefit pension plan:
Reclassification adjustment for net actuarial loss recognized in net periodic benefit cost	[3]	89	68
Tax effect		(59)	(24)
Net-of-tax amount		30	44
Other comprehensive income		1,924	2,409
Comprehensive income		$ 9,411	$ 4,076
[1]	Amounts are included in loss on sales and calls of available-for-sale securities, net, in the consolidated statements of net income. Income tax benefit associated with the reclassification adjustments for the three months ended March 31, 2017 and 2016 was $(356,000) and $(101,000), 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 (unaudited) (Parenthetical) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
Statement of Comprehensive Income [Abstract]
Reclassification adjustment for net losses realized in net income, tax	$ (356)	$ (101)

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 loss
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	4,076				1,667	2,409
ESOP shares committed to be released	265		75	190
Common stock dividends paid ($0.02 and $0.05 per common share for the three months ended March 31, 2016 and 2017, respectively))	(495)				(495)
Repurchase of common stock (shares)		(730,040)
Repurchase of common stock	(10,314)	$ (7)	(10,307)
Restricted stock awards granted (shares)		31,450
Restricted stock awards forfeited (shares)		(7,500)
Share-based compensation expense	1,195		1,195
Ending balance at Mar. 31, 2016	393,556	$ 269	260,041	(21,065)	157,090	(2,779)
Ending balance (shares) at Mar. 31, 2016		27,786,642
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Cumulative effect of change in accounting principle (Note 1)			27		(27)
Beginning balance at Dec. 31, 2016	386,907	$ 259	249,317	(20,496)	161,896	(4,069)
Beginning balance (shares) at Dec. 31, 2016		26,759,953
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Comprehensive income	9,411				7,487	1,924
ESOP shares committed to be released	341		151	190
Common stock dividends paid ($0.02 and $0.05 per common share for the three months ended March 31, 2016 and 2017, respectively))	(1,196)				(1,196)
Restricted stock awards granted (shares)		175,695
Restricted stock awards forfeited (shares)		(84,417)
Share-based compensation expense	1,408		1,408
Share redemption for tax withholdings for restricted stock vesting (shares)		(5,903)
Share redemption for tax withholdings for restricted stock vesting	$ (107)		(107)
Proceeds from exercise of options (shares)	13,000	13,000
Proceeds from exercise of options	$ 180		180
Ending balance at Mar. 31, 2017	$ 396,944	$ 259	$ 250,976	$ (20,306)	$ 168,160	$ (2,145)
Ending balance (shares) at Mar. 31, 2017		26,858,328

Consolidated Statements of Cha8

Consolidated Statements of Changes in Stockholders' Equity (unaudited) (Parenthetical) - $ / shares	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
Statement of Stockholders' Equity [Abstract]
Common stock paid (dollars per share)	$ 0.05	$ 0.02

Consolidated Statements of Cash

Consolidated Statements of Cash Flows (unaudited) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
Cash flows from operating activities:
Net income	$ 7,487	$ 1,667
Adjustments to reconcile net income to net cash provided by operating activities:
Provision (credit) for loan losses	57	(27)
Net amortization of securities	620	854
Loss on sales and calls of available-for-sale securities, net	1,022	244
Net change in loans held for sale	1,086	(2,271)
Gains on sales of portfolio loans, net	0	(169)
Net amortization (accretion) of net deferred loan origination costs and discounts	(19)	112
Depreciation and amortization of premises and equipment	532	476
Amortization of core deposit intangible	247	342
Bank-owned life insurance income	(257)	(257)
ESOP expense	341	265
Deferred income tax provision	428	598
Share-based compensation expense	1,408	1,195
Gain on exchange of investment in Northeast Retirement Services	(5,947)	0
Net change in:
Accrued interest receivable	63	(244)
Other assets	543	(8,090)
Accrued expenses and other liabilities	(3,717)	7,470
Net cash provided by operating activities	3,894	2,165
Activity in securities available for sale:
Purchases	(9,507)	(19,322)
Sales	44,855	15,456
Maturities/calls	0	250
Principal paydowns	3,364	594
Activity in securities held to maturity:
Purchases	(8,086)	(9,238)
Maturities/calls	0	6,085
Principal paydowns	7,099	6,295
Loan originations and purchases, net of paydowns	(55,641)	(43,222)
Proceeds from residential portfolio loan sales	0	7,831
Net purchases of premises and equipment	(356)	(560)
Purchase of FHLBB stock	(1,870)	(2,570)
Redemption of FHLBB stock	394	0
Proceeds from exchange of investment in Northeast Retirement Services	1,595	0
Net cash used in investing activities	(18,153)	(38,401)
Cash flows from financing activities:
Net change in deposits, excluding brokered deposits	70,318	51,065
Net change in brokered deposits	(22,283)	(309)
Net change in short-term borrowings	(28,000)	(35,000)
Proceeds from long-term debt	0	30,000
Repurchase of common stock	0	(10,314)
Share redemption for tax withholdings for restricted stock vesting	(107)	0
Proceeds from exercise of stock options	180	0
Common stock dividends paid	(1,196)	(495)
Net cash provided by financing activities	18,912	34,947
Net change in cash and cash equivalents	4,653	(1,289)
Cash and cash equivalents at beginning of period	30,496	33,298
Cash and cash equivalents at end of period	35,149	32,009
Supplementary information:
Interest paid	3,806	2,803
Income taxes paid, net of refunds	$ 46	$ 65

Basis of Presentation and Conso

Basis of Presentation and Consolidation	3 Months Ended
	Mar. 31, 2017
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") its wholly-owned subsidiaries, Blue Hills Funding Corporation and Blue Hills Bank (the "Bank'), the principal operating entity and its wholly-owned subsidiaries, B.H. Security Corporation, HP Security Corporation and 1196 Corporation, which are Massachusetts security corporations. 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, 2016, 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 valuation of deferred tax assets. Loan policies The Company has historically granted mortgage and consumer loans to its customers and a substantial portion of the loan portfolio consists of mortgage loans in communities including and near the locations of its banking offices. The ability of the Company’s debtors to honor their contracts is dependent upon the real estate and general economic conditions in these areas. The Company’s loan portfolio includes 1-4 family residential real estate, home equity, commercial real estate, construction, commercial business, and consumer segments. 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, deferred origination fees and costs, and discounts on purchased loans. Interest income is accrued on the unpaid principal balance. Deferred loan origination fees/costs and discounts on purchased loans are recognized as an adjustment of the related loan yield using the interest method. It is the policy of the Company to discontinue the accrual of interest on loans past due in excess of 90 days, unless the loan is well-secured and in the process of collection, or when in the judgment of management, the ultimate collectability of the principal or interest becomes doubtful and to reverse all interest previously accrued against interest income. Past due status is based on contractual terms of the loan. The interest on non-accrual loans is accounted for on the cash-basis until qualifying for return to accrual. Loans are returned to accrual status when all the principal and interest amounts contractually due have been current for six consecutive months and future payments are reasonably assured. Allowance for loan losses The allowance for loan losses is based on the size and the composition of the loan portfolio, delinquency levels, loss experience, economic conditions and other factors related to the collectability of the loan portfolio. Prior to the second quarter of 2016, for portfolios for which the Company had insufficient loss experience, losses from a national peer group of depository institutions with assets between one and five billion dollars for relevant portfolios dating back to 2008 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 on a combination of the Company's own history and an extrapolated historical loss experience based on FDIC data for depository institutions with assets of one billion to five billion dollars dating back to 2009, 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 and state 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 first or second 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, real estate collateral and owner-occupied properties. 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 due to increased vacancy rates, which in turn, can 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 classic and collector automobile loans. A significant portion of the used automobile loan portfolio is comprised of geographically diverse loans originated by and purchased from a third party, who also provides collection services and has a loss sharing agreement. Allocated component The allocated component relates to loans that are considered impaired. Impairment is measured by either the present value of expected future cash flows discounted at the loan’s effective interest rate or the fair value of the collateral if the loan is collateral dependent. An allowance is established when the discounted cash flows (or collateral value) of the impaired loan is lower than the carrying value of that loan. A loan is considered impaired when, based on current information and events, it is probable that the Company will be unable to collect the scheduled payments of principal or interest when due according to the contractual terms of the loan agreement. Management reviews all loan types for individual impairment. Factors considered by management in determining impairment include payment status, collateral value, and the probability of collecting scheduled principal and interest payments when due. Loans that experience insignificant payment delays and payment shortfalls generally are not classified as impaired. Management determines the significance of payment delays and payment shortfalls on a case-by-case basis, taking into consideration all of the circumstances surrounding the loan and the borrower, including the length of the delay, the reasons for the delay, the borrower’s prior payment record, and the amount of the shortfall in relation to the principal and interest owed. The Company periodically may agree to modify the contractual terms of loans. When a loan is modified and a concession is made to a borrower experiencing financial difficulty, the modification is considered a troubled debt restructuring (“TDR”). All TDRs are initially classified as impaired and generally remain impaired for the remaining life of the loan. The impaired classification may be removed if the borrower demonstrates compliance with the modified terms and the restructuring agreement specifies an interest rate equal to that which would be provided to a borrower with similar credit at the time of restructuring. Unallocated component The Company previously maintained an unallocated component to cover uncertainties that could affect management’s estimate of probable losses. The unallocated component of the allowance reflected the margin of imprecision inherent in the underlying assumptions used in the methodologies for estimating allocated and general reserves in the portfolio. As a large portion of the Company's loan portfolios is now seasoned, the unallocated component of the allowance for loan losses was eliminated during the fourth quarter of 2016. Change in accounting principle - Share-based compensation In March 2016, the Financial Accounting Standards Board ("FASB") issued an Accounting Standards Update ("ASU"), 2016-09 Compensation-Stock Compensation (Topic 718): Improvements to Employee Share-Based Payment Accounting. This Update amends its guidance on certain aspects of accounting for share-based payments to employees. The provisions of this Update became effective on January 1, 2017. The various changes applicable to adopting this Update include the following: Accounting for Income Taxes The Update states that entities will no longer record the excess tax benefits or deficiencies related to share-based compensation in additional paid in capital. Instead, they will record excess tax benefits or deficiencies in income tax expense or benefit in the income statement as part of the provision for income taxes on a prospective basis. For interim reporting purposes the excess tax benefits or deficiencies will be recorded as discrete items in the period in which they occur. The presentation of the excess tax benefits will be presented as an operating activity in the statement of cash flows. In addition, under the new guidance, when calculating incremental shares for earnings per share, entities exclude from assumed proceeds excess tax benefits that previously would have been recorded in additional paid in capital. The total income tax benefit recorded in the provision for income taxes for the quarter ended March 31, 2017 was $39,000 . One of the previous requirements for an award to qualify for equity classification was that an entity could not partially settle the award for cash in excess of the employer’s minimum statutory withholding requirements. The determination of an employee's minimum statutory withholding amount has been difficult for some entities. Under this Update, the threshold to qualify for equity classification would permit withholding up to the maximum individual statutory tax rate in the applicable jurisdictions. Also, the Update provides that cash paid by an employer when directly withholding shares for tax-withholding purposes would be classified as a financing activity in the statement of cash flows. Accounting for forfeitures Under this Update, the Company has elected to account for forfeitures of share-based payments by recognizing forfeitures of awards as they occur (e.g., when an award does not vest because the employee leaves the Company). The transition to this methodology is applied on a modified retrospective basis, whereby the compensation cost will be calculated as if the entity did not historically record a forfeiture estimate for outstanding awards and instead accounted for forfeitures of outstanding awards as the forfeitures occurred, with a cumulative-effect adjustment to retained earnings. The cumulative effect of changing to this methodology resulted in a $27,000 adjustment to beginning retained earnings in the consolidated statement of changes in stockholders' equity for the quarter ended March 31, 2017 .

Recent Accounting Standards Upd

Recent Accounting Standards Updates	3 Months Ended
	Mar. 31, 2017
Accounting Changes and Error Corrections [Abstract]
Recent Accounting Standards Updates	RECENT ACCOUNTING STANDARDS UPDATES In March 2017, the FASB issued ASU 2017-07, Compensation-Retirement Benefits (Topic 715): Improving the Presentation of Net Period Pension Cost and Net Periodic Postretirement Benefit Cost , to improve guidance related to the presentation of defined benefit cost in the income statement. Under GAAP, defined benefit pension cost and post retirement benefit cost (net benefit cost) comprise several components that reflect different aspects of an employer's financial arrangements, as well as the cost of benefits provided to employees. Those components are aggregated for reporting in the financial statements. Stakeholders had observed that the current presentation of defined benefit cost on a net basis combines elements that are heterogeneous. This reduces transparency and makes it more costly for investors and other users to analyze and understand the information. Under this Update employers will present the service cost component of the net periodic benefit cost in the same income statement line item(s) as other employee compensation costs arising from services rendered during the period. In addition, only the service cost component will be eligible for capitalization in assets. Employers will present the other components separately from the line item(s) that includes the service cost and outside of any subtotal of operating income, if one is presented. Employers will have to disclose the line(s) used to present the other components of net periodic benefit cost, if the components are not presented separately in the income statement. The Update is effective for public business entities for annual periods being after December 15, 2017, including interim periods within those annual periods. Early adoption is permitted. The Update should be applied retrospectively. The impact to the consolidated financial statements upon adopting this Update is not expected to be material. In April 2017, the FASB issued ASU 2017-08 Receivables – Non-refundable Fees and Other Costs (Subtopic 310-20), which shortens the period of amortization of the premium on certain callable debt securities to the earliest call date. Currently, generally accepted accounting principles (“GAAP”) excludes certain callable debt securities from consideration of early repayment of principal even if the holder is certain that the call will be exercised. As a result, upon the exercise of a call on a callable debt security held at a premium, the unamortized premium is recorded as a loss in earnings. This Update requires that premiums on certain callable debt securities be amortized to the shortest call date. Securities within the scope of this paragraph are those that have explicit, noncontingent call features that are callable at fixed prices and on preset dates. This Update is effective for public business entities for annual periods being after December 15, 2018, including interim periods within those annual periods. Early adoption is permitted, including adoption in an interim period. If an entity early adopts the amendments in an interim period, any adjustments should be reflected as of the beginning of the fiscal year that includes that interim period. An entity should apply the amendments from this Update on a modified retrospective basis through a cumulative-effect adjustment directly to retained earnings as of the beginning of the period of adoption. The premium on all investments within the scope of this Update will need to be recalculated from date of purchase as if the premium was being amortized to the call date. The difference between this recalculated amount and the current remaining premium as of the beginning of the period of adoption is recorded as the cumulative effect decrease to retained earnings. The impact to the Company's consolidated financial statements upon adopting this Update is not expected to be material.

Securities

Securities	3 Months Ended
	Mar. 31, 2017
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: March 31, 2017 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 $ 7,293 $ 1 $ (21 ) $ 7,273 Other asset-backed securities 9,166 5 (115 ) 9,056 Total mortgage- and other asset-backed securities 16,459 6 (136 ) 16,329 Municipal bonds 12,318 182 (157 ) 12,343 Financial services: Banks 24,408 69 (249 ) 24,228 Diversified financials 18,803 227 (127 ) 18,903 Insurance and REITs 18,263 156 (183 ) 18,236 Total financial services 61,474 452 (559 ) 61,367 Other corporate: Industrials 48,506 571 (614 ) 48,463 Utilities 25,902 289 (111 ) 26,080 Total other corporate 74,408 860 (725 ) 74,543 Total debt securities 164,659 1,500 (1,577 ) 164,582 Marketable equity securities 9,437 186 (371 ) 9,252 Total securities available for sale $ 174,096 $ 1,686 $ (1,948 ) $ 173,834 March 31, 2017 Amortized Cost Gross Unrealized Gains Gross Unrealized Losses Fair Value (In thousands) Securities Held to Maturity: Debt securities: Government-sponsored enterprises $ 32,670 $ 2 $ (832 ) $ 31,840 Government-sponsored mortgage-backed and collateralized mortgage obligations 155,214 33 (1,718 ) 153,529 SBA asset-backed securities 13,800 — (193 ) 13,607 Total securities held to maturity $ 201,684 $ 35 $ (2,743 ) $ 198,976 December 31, 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 $ 10,530 $ — $ (41 ) $ 10,489 Other asset-backed securities 9,174 6 (195 ) 8,985 Total mortgage- and other asset-backed securities 19,704 6 (236 ) 19,474 Municipal bonds 12,730 120 (157 ) 12,693 Financial services: Banks 20,263 57 (298 ) 20,022 Diversified financials 17,198 190 (198 ) 17,190 Insurance and REITs 18,304 150 (216 ) 18,238 Total financial services 55,765 397 (712 ) 55,450 Other corporate: Industrials 49,217 508 (761 ) 48,964 Utilities 24,895 292 (100 ) 25,087 Total other corporate 74,112 800 (861 ) 74,051 Total debt securities 162,311 1,323 (1,966 ) 161,668 Marketable equity securities: Mutual funds: Domestic community 3,216 25 (19 ) 3,222 Global asset allocation 42,396 48 (2,498 ) 39,946 Total marketable equity securities 45,612 73 (2,517 ) 43,168 Total securities available for sale $ 207,923 $ 1,396 $ (4,483 ) $ 204,836 December 31, 2016 Amortized Cost Gross Unrealized Gains Gross Unrealized Losses Fair Value (In thousands) Securities Held to Maturity: Debt securities: Government-sponsored enterprises $ 32,667 $ 4 $ (934 ) $ 31,737 Government-sponsored mortgage-backed and collateralized mortgage obligations 153,938 14 (1,806 ) 152,146 SBA asset-backed securities 14,422 — (212 ) 14,210 Total securities held to maturity $ 201,027 $ 18 $ (2,952 ) $ 198,093 The amortized cost and estimated fair value of debt securities by contractual maturity at March 31, 2017 are included in the following table. Expected maturities will differ from contractual maturities because the issuers may have the right to call or prepay obligations with or without call or prepayment penalties. Available for Sale Held to Maturity Amortized Cost Fair Value Amortized Cost Fair Value (In thousands) Within 1 year $ 4,785 $ 4,789 $ 5,005 $ 5,001 After 1 year through 5 years 66,244 66,467 9,688 9,497 After 5 years through 10 years 69,528 69,182 17,977 17,342 After 10 years 7,643 7,815 — — 148,200 148,253 32,670 31,840 Mortgage- and asset-backed securities and collateralized mortgage obligations 16,459 16,329 169,014 167,136 $ 164,659 $ 164,582 $ 201,684 $ 198,976 For the three months ended March 31, 2017 and 2016 , proceeds from sales of securities available for sale amounted to $44.9 million and $15.5 million , respectively. Gross realized gains, for the same periods, amounted to $267,000 and $178,000 , respectively, and gross realized losses amounted to $1.3 million and $422,000 , 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: March 31, 2017 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 $ (8 ) $ 1,764 $ (13 ) $ 5,018 Other asset-backed securities (31 ) 3,934 (84 ) 3,794 Total mortgage- and other asset-backed securities (39 ) 5,698 (97 ) 8,812 Municipal bonds (157 ) 5,292 — — Financial services: Banks (249 ) 13,220 — — Diversified financials (127 ) 8,626 — — Insurance and REITs (183 ) 4,641 — — Total financial services (559 ) 26,487 — — Other corporate: Industrials (530 ) 16,110 (84 ) 2,255 Utilities (111 ) 16,860 — — Total other corporate (641 ) 32,970 (84 ) 2,255 Total debt securities (1,396 ) 70,447 (181 ) 11,067 Marketable equity securities (350 ) 4,409 (21 ) 445 Total temporarily impaired available-for-sale securities $ (1,746 ) $ 74,856 $ (202 ) $ 11,512 Securities Held to Maturity: Debt securities: Government-sponsored enterprises $ (832 ) $ 30,645 $ — $ — Government-sponsored mortgage-backed and collateralized mortgage obligations (1,682 ) 135,636 (36 ) 3,873 SBA asset-backed securities (87 ) 8,622 (106 ) 4,985 Total temporarily impaired held-to-maturity securities $ (2,601 ) $ 174,903 $ (142 ) $ 8,858 The Company continually reviews 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 March 31, 2017 , 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 March 31, 2017 . At March 31, 2017 , the Company had two marketable equity securities with unrealized losses of $371,000 , or 7.1% 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, 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 securities $ (11 ) $ 3,163 $ (30 ) $ 7,326 Other asset-backed securities (43 ) 3,924 (152 ) 3,732 Total mortgage- and other asset-backed securities (54 ) 7,087 (182 ) 11,058 Municipal bonds (157 ) 5,301 — — Financial services: Banks (298 ) 14,553 — — Diversified financials (198 ) 9,369 — — Insurance and REITs (216 ) 6,900 — — Total financial services (712 ) 30,822 — — Other corporate: Industrials (655 ) 24,630 (106 ) 2,284 Utilities (99 ) 11,200 (1 ) 794 Total other corporate (754 ) 35,830 (107 ) 3,078 Total debt securities (1,677 ) 79,040 (289 ) 14,136 Marketable equity securities: Mutual funds: Domestic community — — (19 ) 448 Global asset allocation (424 ) 15,153 (2,074 ) 22,442 Total marketable equity securities (424 ) 15,153 (2,093 ) 22,890 Total temporarily impaired available-for-sale securities $ (2,101 ) $ 94,193 $ (2,382 ) $ 37,026 December 31, 2016 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: Government-sponsored enterprises $ (934 ) $ 28,533 $ — $ — Government-sponsored mortgage-backed and collateralized mortgage obligations (1,763 ) 146,098 (43 ) 3,827 SBA asset-backed securities (104 ) 9,157 (108 ) 5,053 Total temporarily impaired held-to-maturity securities $ (2,801 ) $ 183,788 $ (151 ) $ 8,880

Loans and The Allowance for Loa

Loans and The Allowance for Loan Losses	3 Months Ended
	Mar. 31, 2017
Receivables [Abstract]
Loans and The Allowance for Loan Losses	LOANS AND THE ALLOWANCE FOR LOAN LOSSES A summary of the balances of loans follows: March 31, December 31, 2017 2016 (In thousands) Real estate: 1-4 family residential $ 893,569 $ 851,154 Home equity 79,975 78,719 Commercial real estate 702,122 687,289 Construction 71,165 76,351 1,746,831 1,693,513 Commercial business 210,738 206,234 Consumer 26,978 29,281 Total loans 1,984,547 1,929,028 Allowance for loan losses (18,875 ) (18,750 ) Discount and fair value adjustments on purchased loans (1,804 ) (1,846 ) Deferred loan costs and fees, net 4,606 4,439 Loans, net $ 1,968,474 $ 1,912,871 Activity in the allowance for loan losses for the three months ended March 31, 2017 and 2016 , by loan segment, follows: 1-4 Family Home Commercial Construction Commercial Consumer Unallocated Total (In thousands) Three Months Ended March 31, 2017 Allowance at December 31, 2016 $ 4,846 $ 537 $ 8,374 $ 1,353 $ 3,206 $ 434 $ — $ 18,750 Provision (credit) for loan losses 80 21 (41 ) 104 (89 ) (18 ) — 57 Loans charged-off — — — — — (15 ) — (15 ) Recoveries 74 — — — 9 — — 83 Allowance at March 31, 2017 $ 5,000 $ 558 $ 8,333 $ 1,457 $ 3,126 $ 401 $ — $ 18,875 Three Months Ended March 31, 2016 Allowance at December 31, 2015 $ 3,916 $ 636 $ 7,147 $ 1,364 $ 2,839 $ 772 $ 428 $ 17,102 Provision (credit) for loan losses (251 ) (19 ) 191 258 (148 ) (55 ) (3 ) (27 ) Loans charged-off — — — — (105 ) (18 ) — (123 ) Recoveries — — — — 33 — — 33 Allowance at March 31, 2016 $ 3,665 $ 617 $ 7,338 $ 1,622 $ 2,619 $ 699 $ 425 $ 16,985 Additional information pertaining to the allowance for loan losses at March 31, 2017 and December 31, 2016 is as follows: 1-4 Family Home Commercial Construction Commercial Consumer Unallocated Total (In thousands) March 31, 2017 Allowance related to impaired loans $ 16 $ — $ — $ — $ — $ — $ — $ 16 Allowance related to non-impaired loans 4,984 558 8,333 1,457 3,126 401 — 18,859 Total allowance for loan losses $ 5,000 $ 558 $ 8,333 $ 1,457 $ 3,126 $ 401 $ — $ 18,875 Impaired loans $ 6,513 $ 1,388 $ 5,073 $ — $ 224 $ 155 $ — $ 13,353 Non-impaired loans 887,056 78,587 697,049 71,165 210,514 26,823 — 1,971,194 Total loans $ 893,569 $ 79,975 $ 702,122 $ 71,165 $ 210,738 $ 26,978 $ — $ 1,984,547 December 31, 2016 Allowance related to impaired loans $ 17 $ — $ — $ — $ — $ — $ — $ 17 Allowance related to non-impaired loans 4,829 537 8,374 1,353 3,206 434 — 18,733 Total allowance for loan losses $ 4,846 $ 537 $ 8,374 $ 1,353 $ 3,206 $ 434 $ — $ 18,750 Impaired loans $ 6,726 $ 1,153 $ 941 $ — $ 241 $ 170 $ — $ 9,231 Non-impaired loans 844,428 77,566 686,348 76,351 205,993 29,111 — 1,919,797 Total loans $ 851,154 $ 78,719 $ 687,289 $ 76,351 $ 206,234 $ 29,281 $ — $ 1,929,028 The following is a summary of past due and non-accrual loans, by loan class, at March 31, 2017 and December 31, 2016 : 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) March 31, 2017 Real estate: 1-4 family residential $ 2,112 $ 211 $ 1,636 $ 3,959 $ 6,269 Home equity 867 — 587 1,454 1,388 Commercial real estate — — 4,149 4,149 5,073 Commercial business 4,676 — — 4,676 224 Consumer 46 389 79 514 155 Total $ 7,701 $ 600 $ 6,451 $ 14,752 $ 13,109 December 31, 2016 Real estate: 1-4 family residential $ 584 $ 373 $ 2,322 $ 3,279 $ 6,478 Home equity 452 496 775 1,723 1,153 Commercial real estate 1,393 — — 1,393 941 Commercial business 4,996 13 — 5,009 241 Consumer 175 5 7 187 170 Total $ 7,600 $ 887 $ 3,104 $ 11,591 $ 8,983 There were no loans past due 90 days or more and still accruing interest at March 31, 2017 and December 31, 2016 . 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 March 31, 2017 (In thousands) Impaired loans without a valuation allowance: Real estate: 1-4 family residential $ 6,395 $ 6,739 $ — Home equity 1,388 1,455 — Commercial real estate 5,073 5,468 — Commercial business 224 3,288 — Consumer 155 166 — Total 13,235 17,116 — Impaired loans with a valuation allowance: 1-4 family residential 118 310 16 Total impaired loans $ 13,353 $ 17,426 $ 16 December 31, 2016 Impaired loans without a valuation allowance: Real estate: 1-4 family residential $ 6,605 $ 7,023 $ — Home equity 1,153 1,225 — Commercial real estate 941 1,207 — Commercial business 241 3,279 — Consumer 170 183 — Total 9,110 12,917 — Impaired loans with a valuation allowance: 1-4 family residential 121 313 17 Total impaired loans $ 9,231 $ 13,230 $ 17 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 March 31, 2017 (In thousands) Real estate: 1-4 family residential $ 6,620 $ 78 Home equity 1,087 14 Commercial real estate 3,007 8 Commercial 232 3 Consumer 167 1 Total $ 11,113 $ 104 Three Months Ended March 31, 2016 Real estate: 1-4 family residential $ 6,321 $ 73 Home equity 290 4 Commercial real estate 4,474 42 Commercial 5 — Consumer 177 2 Total $ 11,267 $ 121 No additional funds are committed to be advanced in connection with impaired loans. There were no material troubled debt restructurings recorded during the three months ended March 31, 2017 or 2016 . 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 March 31, 2017 and December 31, 2016 : 1-4 Family Residential Home Equity Commercial Real Estate Construction Commercial Business Consumer Total Loans (In thousands) March 31, 2017 Loans rated 1 - 6 $ 1,046 $ 288 $ 693,062 $ 71,165 $ 194,471 $ 4 $ 960,036 Loans rated 7 3,509 1,343 3,812 — 16,259 145 25,068 Loans rated 8 2,419 112 5,248 — 8 12 7,799 Loans rated 9 460 — — — — — 460 Loans rated 10 — — — — — — — Loans not rated 886,135 78,232 — — — 26,817 991,184 $ 893,569 $ 79,975 $ 702,122 $ 71,165 $ 210,738 $ 26,978 $ 1,984,547 December 31, 2016 Loans rated 1 - 6 $ 1,054 $ 293 $ 671,872 $ 76,351 $ 188,706 $ 4 $ 938,280 Loans rated 7 3,514 967 9,720 — 17,510 146 31,857 Loans rated 8 2,442 258 5,697 — 18 37 8,452 Loans rated 9 645 — — — — — 645 Loans rated 10 — — — — — — — Loans not rated 843,499 77,201 — — — 29,094 949,794 $ 851,154 $ 78,719 $ 687,289 $ 76,351 $ 206,234 $ 29,281 $ 1,929,028

Derivatives

Derivatives	3 Months Ended
	Mar. 31, 2017
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 March 31, 2017 and December 31, 2016 . Derivative Gains Derivative Losses Notional Amount Fair Value Notional Amount Fair Value (In thousands) March 31, 2017 Economic hedges: Commercial loan level interest rate swap agreements $ 426,021 $ 8,602 $ 426,021 $ 8,602 Other contracts 15,746 — 32,873 — Total derivatives $ 441,767 $ 8,602 $ 458,894 $ 8,602 December 31, 2016 Economic hedges: Commercial loan level interest rate swap agreements $ 419,488 $ 9,016 $ 419,488 $ 8,932 Other contracts 15,685 8 33,045 56 Total derivatives $ 435,173 $ 9,024 $ 452,533 $ 8,988 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 amounts of mortgage loan commitments as of March 31, 2017 and December 31, 2016 were $22.1 million and $6.8 million , respectively. The fair values of such commitments as of March 31, 2017 and December 31, 2016 included gains of $275,000 and $111,000 , respectively, recorded in other assets and losses of $37,000 and $3,000 , respectively, recorded in other liabilities 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 amounts of forward loan sale commitments at March 31, 2017 and December 31, 2016 were $23.8 million and $9.5 million , respectively. The fair values of such commitments as of March 31, 2017 and December 31, 2016 included gains of $37,000 and $15,000 , respectively, recorded in other assets and losses of $35,000 and $74,000 , respectively, recorded in other liabilities on the consolidated balance sheet.

Deposits

Deposits	3 Months Ended
	Mar. 31, 2017
Banking and Thrift [Abstract]
Deposits	DEPOSITS A summary of deposit balances, by type, is as follows: March 31, December 31, 2017 2016 (In thousands) NOW and demand $ 342,118 $ 331,508 Regular savings 265,116 262,984 Money market 622,852 573,204 Brokered money market 50,129 53,357 Total non-certificate accounts 1,280,215 1,221,053 Term certificates of $250,000 or more 82,814 77,550 Term certificates less than $250,000 265,228 262,564 Brokered term certificates 228,465 247,520 Total term certificate accounts 576,507 587,634 Total deposits $ 1,856,722 $ 1,808,687 At March 31, 2017 , the scheduled maturities of term certificate accounts, including brokered deposits, are as follows: Amount Weighted Average Rate (Dollars in thousands) Within 1 year $ 346,078 0.73 % 1-2 years 95,556 1.28 2-3 years 87,624 1.78 3-4 years 25,626 1.83 4 years and beyond 21,623 1.71 $ 576,507 1.07 %

Fair Value Measurements

Fair Value Measurements	3 Months Ended
	Mar. 31, 2017
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 March 31, 2017 and December 31, 2016 , 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) March 31, 2017 Assets Securities available for sale: Debt securities $ — $ 164,582 $ — $ 164,582 Marketable equity securities 9,252 — — 9,252 Derivative assets: Interest rate swap agreements — 8,602 — 8,602 Forward loan sale commitments — — 37 37 Mortgage loan commitments — — 275 275 Total assets $ 9,252 $ 173,184 $ 312 $ 182,748 Liabilities Derivative liabilities: Interest rate swap agreements $ — $ 8,602 $ — $ 8,602 Forward loan sale commitments — — 35 35 Mortgage loan commitments — — 37 37 Total liabilities $ — $ 8,602 $ 72 $ 8,674 December 31, 2016 Assets Securities available for sale: Debt securities $ — $ 161,668 $ — $ 161,668 Marketable equity securities 43,168 — — 43,168 Derivative assets: Interest rate swap agreements — 9,024 — 9,024 Forward loan sale commitments — — 15 15 Mortgage loan commitments — — 111 111 Total assets $ 43,168 $ 170,692 $ 126 $ 213,986 Liabilities Derivative liabilities: Interest rate swap agreements $ — $ 8,988 $ — $ 8,988 Forward loan sale commitments — — 74 74 Mortgage loan commitments — — 3 3 Total liabilities $ — $ 8,988 $ 77 $ 9,065 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: March 31, 2017 December 31, 2016 Level 1 Level 2 Level 3 Level 1 Level 2 Level 3 (In thousands) Impaired loans $ — $ — $ 151 $ — $ — $ 136 The following table summarizes the total gains on assets measured at fair value on a non-recurring basis for the three months ended March 31, 2017 and 2016 . Three Months Ended March 31, 2017 2016 (In thousands) Impaired loans $ 77 $ 221 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 gains and 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) March 31, 2017 Financial assets: Cash and cash equivalents $ 35,149 $ 35,149 $ — $ — $ 35,149 Securities available for sale 173,834 9,252 164,582 — 173,834 Securities held to maturity 201,684 — 198,976 — 198,976 Federal Home Loan Bank stock 14,828 — — 14,828 14,828 Loans and loans held for sale 1,970,149 — — 1,960,134 1,960,134 Accrued interest receivable 5,994 — — 5,994 5,994 Financial liabilities: Deposits 1,856,722 — — 1,856,153 1,856,153 Borrowings 223,000 — 222,512 — 222,512 On-balance sheet derivative financial instruments: Derivative assets: Interest rate swap agreements 8,602 — 8,602 — 8,602 Forward loan sale commitments 37 — — 37 37 Mortgage loan commitments 275 — — 275 275 Derivative liabilities: Interest rate swap agreements 8,602 — 8,602 — 8,602 Forward loan sale commitments 35 — — 35 35 Mortgage loan commitments 37 — — 37 37 December 31, 2016 Financial assets: Cash and cash equivalents $ 30,496 $ 30,496 $ — $ — $ 30,496 Securities available for sale 204,836 43,168 161,668 — 204,836 Securities held to maturity 201,027 — 198,093 — 198,093 Federal Home Loan Bank stock 13,352 — — 13,352 13,352 Loans and loans held for sale 1,915,632 — — 1,903,978 1,903,978 Accrued interest receivable 6,057 — — 6,057 6,057 Financial liabilities: Deposits 1,808,687 — — 1,808,629 1,808,629 Borrowings 251,000 — 250,648 — 250,648 On-balance sheet derivative financial instruments: Derivative assets: Interest rate swap agreements 9,024 — 9,024 — 9,024 Forward loan sale commitments 15 — — 15 15 Mortgage loan commitments 111 — — 111 111 Derivative liabilities: Interest rate swap agreements 8,988 — 8,988 — 8,988 Forward loan sale commitments 74 — — 74 74 Mortgage loan commitments 3 — — 3 3

Comprehensive Income

Comprehensive Income	3 Months Ended
	Mar. 31, 2017
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 loss, included in stockholders' equity, are as follows: March 31, December 31, 2017 2016 (In thousands) Securities available for sale: Net unrealized loss $ (262 ) $ (3,087 ) Tax effect 103 1,007 Net-of-tax amount (159 ) (2,080 ) Securities held to maturity: Net unrealized gain on transferred securities 314 337 Tax effect (118 ) (114 ) Net-of-tax amount 196 223 Defined benefit pension plan: Unrecognized net actuarial loss (3,393 ) (3,482 ) Tax effect 1,211 1,270 Net-of-tax amount (2,182 ) (2,212 ) $ (2,145 ) $ (4,069 ) Changes in accumulated other comprehensive income (loss), by component, follow: Three Months Ended March 31, 2017 Securities Available for Sale Securities Held to Maturity Defined Benefit Pension Plan Total (In thousands) Balance at December 31, 2016 $ (2,080 ) $ 223 $ (2,212 ) $ (4,069 ) Other comprehensive income before reclassification adjustments 1,803 — — 1,803 Reclassification adjustments: Net realized losses 1,022 — — 1,022 Amortization of actuarial losses — — 89 89 Amortization of amounts previously recorded upon transfer from available for sale — (23 ) — (23 ) Tax effects (904 ) (4 ) (59 ) (967 ) Net current-period other comprehensive income (loss) 1,921 (27 ) 30 1,924 Balance at March 31, 2017 $ (159 ) $ 196 $ (2,182 ) $ (2,145 ) Three Months Ended March 31, 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 loss before reclassification adjustments 3,415 — — 3,415 Reclassification adjustments: Net realized losses 289 — — 289 Amortization of actuarial losses — — 68 68 Amortization of amounts previously recorded upon transfer from available for sale — (70 ) — (70 ) Tax effects (1,294 ) 25 (24 ) (1,293 ) Net current-period other comprehensive income (loss) 2,410 (45 ) 44 2,409 Balance at March 31, 2016 $ (1,346 ) $ 329 $ (1,762 ) $ (2,779 )

Stockholders' Equity

Stockholders' Equity	3 Months Ended
	Mar. 31, 2017
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. Federal banking regulations include minimum capital ratios as displayed in the following table. 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 multiple years, with an initial phase-in of 0.625% . Beginning on January 1, 2017, the capital conservation buffer is 1.250% . Also, certain deductions from and adjustments to regulatory capital are being phased in over several years. Management believes that the Company 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 March 31, 2017 . As of March 31, 2017 , 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 March 31, 2017 and December 31, 2016 , 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 March 31, 2017 and December 31, 2016 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.: March 31, 2017 Total capital (to risk weighted assets) $ 405,534 20.4 % $ 158,655 8.0 % 198,318 10.0 % Tier 1 capital (to risk weighted assets) 386,659 19.5 118,991 6.0 158,655 8.0 Common equity Tier 1 (to risk weighted assets) 386,659 19.5 89,243 4.5 128,907 6.5 Tier 1 capital (to average assets) 386,659 15.6 98,895 4.0 123,619 5.0 December 31, 2016 Total capital (to risk weighted assets) $ 395,325 20.5 % $ 154,471 8.0 % 193,089 10.0 % Tier 1 capital (to risk weighted assets) 376,575 19.5 115,854 6.0 154,471 8.0 Common equity Tier 1 (to risk weighted assets) 376,575 19.5 86,890 4.5 125,508 6.5 Tier 1 capital (to average assets) 376,575 16.0 94,166 4.0 117,708 5.0 Blue Hills Bank: March 31, 2017 Total capital (to risk weighted assets) $ 325,098 16.4 % $ 158,418 8.0 % $ 198,023 10.0 % Tier 1 capital (to risk weighted assets) 306,223 15.5 118,814 6.0 158,418 8.0 Common equity Tier 1 (to risk weighted assets) 306,223 15.5 89,110 4.5 128,715 6.5 Tier 1 capital (to average assets) 306,223 12.4 98,897 4.0 123,622 5.0 December 31, 2016 Total capital (to risk weighted assets) $ 313,457 16.3 % $ 154,196 8.0 % $ 192,745 10.0 % Tier 1 capital (to risk weighted assets) 294,707 15.3 115,647 6.0 154,196 8.0 Common equity Tier 1 (to risk weighted assets) 294,707 15.3 86,735 4.5 125,284 6.5 Tier 1 capital (to average assets) 294,707 12.5 94,099 4.0 117,623 5.0

Employee Stock Ownership Plan

Employee Stock Ownership Plan	3 Months Ended
	Mar. 31, 2017
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: March 31, 2017 December 31, 2016 Allocated 225,247 149,613 Committed to be allocated 18,718 75,912 Unallocated 2,030,890 2,049,608 2,274,855 2,275,133 The fair value of unallocated shares was approximately $36.3 million and $38.4 million at March 31, 2017 and December 31, 2016 , respectively. Total compensation expense recognized in connection with the ESOP for the three months ended March 31, 2017 and 2016 was $341,000 and $265,000 , respectively.

Earnings Per Common Share

Earnings Per Common Share	3 Months Ended
	Mar. 31, 2017
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 March 31, 2017 2016 (In thousands, except share amounts) Net income applicable to common stock $ 7,487 $ 1,667 Average number of common shares outstanding 26,842,047 28,176,619 Less: Average unallocated ESOP shares (2,040,249 ) (2,115,383 ) Less: Average unvested restricted stock awards (890,379 ) (995,150 ) Average number of common shares outstanding used to calculate basic earnings per common share 23,911,419 25,066,086 Effect of dilutive stock options 139,392 — Effect of dilutive unvested restricted stock awards 224,854 66,355 Average number of common shares outstanding used to calculate diluted earnings per common share 24,275,665 25,132,441 Earnings per common share: Basic $ 0.31 $ 0.07 Diluted $ 0.31 $ 0.07 Options for 362,100 and 2,479,000 shares were not included in the computation of diluted earnings per common share because to do so would have been anti-dilutive for the three months ended March 31, 2017 and 2016 , respectively.

Share-Based Compensation

Share-Based Compensation	3 Months Ended
	Mar. 31, 2017
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 three months ended March 31, 2017 . Options granted 362,100 Vesting period (years) 5 Term (years) 10 Expected volatility 27.22%-27.43% Expected life (years) 6.5 Expected dividend yield 0.71%-1.11% Risk free interest rate 2.04%-2.16% Fair value per option $5.05-$5.31 A summary of the status of the Company's stock option grants for the three months ended March 31, 2017 , 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, 2016 2,449,670 $ 14.06 — $ — Granted 362,100 18.24 — — Forfeited (150,500 ) 14.07 — — Exercised (13,000 ) 13.84 — — Outstanding at March 31, 2017 2,648,270 $ 14.64 8.71 $ 8,653,603 Exercisable at March 31, 2017 493,890 $ 14.07 8.53 $ 1,866,904 Unrecognized compensation cost at March 31, 2017 $ 8,502,000 Weighted average remaining recognition period (years) 3.81 For the three months ended March 31, 2017 and 2016, share-based compensation expense applicable to the stock options was $610,000 and $ 511,000 , respectively, and the recognized tax benefit related to this expense was $156,000 and $125,000 . 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 three months ended March 31, 2017 : Outstanding Restricted Stock Awards Weighted Average Grant Price Nonvested stock awards at December 31, 2016 816,070 $ 14.06 Granted 175,695 18.25 Vested (21,873 ) 13.98 Forfeited (84,417 ) 14.07 Nonvested stock awards at March 31, 2017 885,475 $ 14.89 Unrecognized compensation cost inclusive of directors' fees at March 31, 2017 $11,907,000 Weighted average remaining recognition period (years) 3.90 For the three months ended March 31, 2017 and 2016, share-based compensation expense applicable to restricted stock awards was $ 798,000 and $684,000 , respectively, and the recognized tax benefit related to this expense was $305,000 and $243,000 respectively.

Subsequent Events

Subsequent Events	3 Months Ended
	Mar. 31, 2017
Subsequent Events [Abstract]
Subsequent Events	SUBSEQUENT EVENTS On April 28, 2017, the Company’s Management Investment Committee approved a change in strategy to liquidate its externally managed available for sale debt securities portfolio (largely consisting of corporate debt). Historically the externally managed portion of the portfolio had a focus on maximizing investment returns. Continued rising interest rates would likely negatively impact the returns of this portfolio over time. At March 31, 2017, this portfolio had a carrying value of $164.6 million including gross unrealized gains of $1.5 million and gross unrealized losses of $1.6 million , with a net unrealized loss of $77,000 . As of May 1, 2017 the carrying value of the portfolio was $165.3 million including gross unrealized gains of $1.8 million and gross unrealized losses of $1.2 million , for a net unrealized gain of approximately $600,000 . The Company intends to invest approximately $100.0 million of the proceeds in its internally managed fixed income securities liquidity portfolio, which is accounted for as held to maturity. This pool focuses on maximizing income while maintaining high quality intermediate duration as well as to provide adequate short-term liquidity to meet any cash flow demands. The remaining proceeds will be used to fund incremental loan growth. As the Company executes this transition, realized gains and losses may differ from the amounts noted above.

Basis of Presentation and Con23

Basis of Presentation and Consolidation (Policies)	3 Months Ended
	Mar. 31, 2017
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") its wholly-owned subsidiaries, Blue Hills Funding Corporation and Blue Hills Bank (the "Bank'), the principal operating entity and its wholly-owned subsidiaries, B.H. Security Corporation, HP Security Corporation and 1196 Corporation, which are Massachusetts security corporations. 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, 2016, 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 valuation of deferred tax assets.
Loan policies	Loan policies The Company has historically granted mortgage and consumer loans to its customers and a substantial portion of the loan portfolio consists of mortgage loans in communities including and near the locations of its banking offices. The ability of the Company’s debtors to honor their contracts is dependent upon the real estate and general economic conditions in these areas. The Company’s loan portfolio includes 1-4 family residential real estate, home equity, commercial real estate, construction, commercial business, and consumer segments. 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, deferred origination fees and costs, and discounts on purchased loans. Interest income is accrued on the unpaid principal balance. Deferred loan origination fees/costs and discounts on purchased loans are recognized as an adjustment of the related loan yield using the interest method. It is the policy of the Company to discontinue the accrual of interest on loans past due in excess of 90 days, unless the loan is well-secured and in the process of collection, or when in the judgment of management, the ultimate collectability of the principal or interest becomes doubtful and to reverse all interest previously accrued against interest income. Past due status is based on contractual terms of the loan. The interest on non-accrual loans is accounted for on the cash-basis until qualifying for return to accrual. Loans are returned to accrual status when all the principal and interest amounts contractually due have been current for six consecutive months and future payments are reasonably assured.
Allowance for Loan Losses	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 loss experience, losses from a national peer group of depository institutions with assets between one and five billion dollars for relevant portfolios dating back to 2008 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 on a combination of the Company's own history and an extrapolated historical loss experience based on FDIC data for depository institutions with assets of one billion to five billion dollars dating back to 2009, 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 and state 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 first or second 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, real estate collateral and owner-occupied properties. 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 due to increased vacancy rates, which in turn, can 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 classic and collector automobile loans. A significant portion of the used automobile loan portfolio is comprised of geographically diverse loans originated by and purchased from a third party, who also provides collection services and has a loss sharing agreement. Allocated component The allocated component relates to loans that are considered impaired. Impairment is measured by either the present value of expected future cash flows discounted at the loan’s effective interest rate or the fair value of the collateral if the loan is collateral dependent. An allowance is established when the discounted cash flows (or collateral value) of the impaired loan is lower than the carrying value of that loan. A loan is considered impaired when, based on current information and events, it is probable that the Company will be unable to collect the scheduled payments of principal or interest when due according to the contractual terms of the loan agreement. Management reviews all loan types for individual impairment. Factors considered by management in determining impairment include payment status, collateral value, and the probability of collecting scheduled principal and interest payments when due. Loans that experience insignificant payment delays and payment shortfalls generally are not classified as impaired. Management determines the significance of payment delays and payment shortfalls on a case-by-case basis, taking into consideration all of the circumstances surrounding the loan and the borrower, including the length of the delay, the reasons for the delay, the borrower’s prior payment record, and the amount of the shortfall in relation to the principal and interest owed. The Company periodically may agree to modify the contractual terms of loans. When a loan is modified and a concession is made to a borrower experiencing financial difficulty, the modification is considered a troubled debt restructuring (“TDR”). All TDRs are initially classified as impaired and generally remain impaired for the remaining life of the loan. The impaired classification may be removed if the borrower demonstrates compliance with the modified terms and the restructuring agreement specifies an interest rate equal to that which would be provided to a borrower with similar credit at the time of restructuring. Unallocated component The Company previously maintained an unallocated component to cover uncertainties that could affect management’s estimate of probable losses. The unallocated component of the allowance reflected the margin of imprecision inherent in the underlying assumptions used in the methodologies for estimating allocated and general reserves in the portfolio. As a large portion of the Company's loan portfolios is now seasoned, the unallocated component of the allowance for loan losses was eliminated during the fourth quarter of 2016.
Recent Accounting Standards Updates	Change in accounting principle - Share-based compensation In March 2016, the Financial Accounting Standards Board ("FASB") issued an Accounting Standards Update ("ASU"), 2016-09 Compensation-Stock Compensation (Topic 718): Improvements to Employee Share-Based Payment Accounting. This Update amends its guidance on certain aspects of accounting for share-based payments to employees. The provisions of this Update became effective on January 1, 2017. The various changes applicable to adopting this Update include the following: Accounting for Income Taxes The Update states that entities will no longer record the excess tax benefits or deficiencies related to share-based compensation in additional paid in capital. Instead, they will record excess tax benefits or deficiencies in income tax expense or benefit in the income statement as part of the provision for income taxes on a prospective basis. For interim reporting purposes the excess tax benefits or deficiencies will be recorded as discrete items in the period in which they occur. The presentation of the excess tax benefits will be presented as an operating activity in the statement of cash flows. In addition, under the new guidance, when calculating incremental shares for earnings per share, entities exclude from assumed proceeds excess tax benefits that previously would have been recorded in additional paid in capital. The total income tax benefit recorded in the provision for income taxes for the quarter ended March 31, 2017 was $39,000 . One of the previous requirements for an award to qualify for equity classification was that an entity could not partially settle the award for cash in excess of the employer’s minimum statutory withholding requirements. The determination of an employee's minimum statutory withholding amount has been difficult for some entities. Under this Update, the threshold to qualify for equity classification would permit withholding up to the maximum individual statutory tax rate in the applicable jurisdictions. Also, the Update provides that cash paid by an employer when directly withholding shares for tax-withholding purposes would be classified as a financing activity in the statement of cash flows. Accounting for forfeitures Under this Update, the Company has elected to account for forfeitures of share-based payments by recognizing forfeitures of awards as they occur (e.g., when an award does not vest because the employee leaves the Company). The transition to this methodology is applied on a modified retrospective basis, whereby the compensation cost will be calculated as if the entity did not historically record a forfeiture estimate for outstanding awards and instead accounted for forfeitures of outstanding awards as the forfeitures occurred, with a cumulative-effect adjustment to retained earnings. The cumulative effect of changing to this methodology resulted in a $27,000 adjustment to beginning retained earnings in the consolidated statement of changes in stockholders' equity for the quarter ended March 31, 2017 . RECENT ACCOUNTING STANDARDS UPDATES In March 2017, the FASB issued ASU 2017-07, Compensation-Retirement Benefits (Topic 715): Improving the Presentation of Net Period Pension Cost and Net Periodic Postretirement Benefit Cost , to improve guidance related to the presentation of defined benefit cost in the income statement. Under GAAP, defined benefit pension cost and post retirement benefit cost (net benefit cost) comprise several components that reflect different aspects of an employer's financial arrangements, as well as the cost of benefits provided to employees. Those components are aggregated for reporting in the financial statements. Stakeholders had observed that the current presentation of defined benefit cost on a net basis combines elements that are heterogeneous. This reduces transparency and makes it more costly for investors and other users to analyze and understand the information. Under this Update employers will present the service cost component of the net periodic benefit cost in the same income statement line item(s) as other employee compensation costs arising from services rendered during the period. In addition, only the service cost component will be eligible for capitalization in assets. Employers will present the other components separately from the line item(s) that includes the service cost and outside of any subtotal of operating income, if one is presented. Employers will have to disclose the line(s) used to present the other components of net periodic benefit cost, if the components are not presented separately in the income statement. The Update is effective for public business entities for annual periods being after December 15, 2017, including interim periods within those annual periods. Early adoption is permitted. The Update should be applied retrospectively. The impact to the consolidated financial statements upon adopting this Update is not expected to be material. In April 2017, the FASB issued ASU 2017-08 Receivables – Non-refundable Fees and Other Costs (Subtopic 310-20), which shortens the period of amortization of the premium on certain callable debt securities to the earliest call date. Currently, generally accepted accounting principles (“GAAP”) excludes certain callable debt securities from consideration of early repayment of principal even if the holder is certain that the call will be exercised. As a result, upon the exercise of a call on a callable debt security held at a premium, the unamortized premium is recorded as a loss in earnings. This Update requires that premiums on certain callable debt securities be amortized to the shortest call date. Securities within the scope of this paragraph are those that have explicit, noncontingent call features that are callable at fixed prices and on preset dates. This Update is effective for public business entities for annual periods being after December 15, 2018, including interim periods within those annual periods. Early adoption is permitted, including adoption in an interim period. If an entity early adopts the amendments in an interim period, any adjustments should be reflected as of the beginning of the fiscal year that includes that interim period. An entity should apply the amendments from this Update on a modified retrospective basis through a cumulative-effect adjustment directly to retained earnings as of the beginning of the period of adoption. The premium on all investments within the scope of this Update will need to be recalculated from date of purchase as if the premium was being amortized to the call date. The difference between this recalculated amount and the current remaining premium as of the beginning of the period of adoption is recorded as the cumulative effect decrease to retained earnings. The impact to the Company's consolidated financial statements upon adopting this Update is not expected to be material.

Securities (Tables)

Securities (Tables)	3 Months Ended
	Mar. 31, 2017
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: March 31, 2017 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 $ 7,293 $ 1 $ (21 ) $ 7,273 Other asset-backed securities 9,166 5 (115 ) 9,056 Total mortgage- and other asset-backed securities 16,459 6 (136 ) 16,329 Municipal bonds 12,318 182 (157 ) 12,343 Financial services: Banks 24,408 69 (249 ) 24,228 Diversified financials 18,803 227 (127 ) 18,903 Insurance and REITs 18,263 156 (183 ) 18,236 Total financial services 61,474 452 (559 ) 61,367 Other corporate: Industrials 48,506 571 (614 ) 48,463 Utilities 25,902 289 (111 ) 26,080 Total other corporate 74,408 860 (725 ) 74,543 Total debt securities 164,659 1,500 (1,577 ) 164,582 Marketable equity securities 9,437 186 (371 ) 9,252 Total securities available for sale $ 174,096 $ 1,686 $ (1,948 ) $ 173,834 December 31, 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 $ 10,530 $ — $ (41 ) $ 10,489 Other asset-backed securities 9,174 6 (195 ) 8,985 Total mortgage- and other asset-backed securities 19,704 6 (236 ) 19,474 Municipal bonds 12,730 120 (157 ) 12,693 Financial services: Banks 20,263 57 (298 ) 20,022 Diversified financials 17,198 190 (198 ) 17,190 Insurance and REITs 18,304 150 (216 ) 18,238 Total financial services 55,765 397 (712 ) 55,450 Other corporate: Industrials 49,217 508 (761 ) 48,964 Utilities 24,895 292 (100 ) 25,087 Total other corporate 74,112 800 (861 ) 74,051 Total debt securities 162,311 1,323 (1,966 ) 161,668 Marketable equity securities: Mutual funds: Domestic community 3,216 25 (19 ) 3,222 Global asset allocation 42,396 48 (2,498 ) 39,946 Total marketable equity securities 45,612 73 (2,517 ) 43,168 Total securities available for sale $ 207,923 $ 1,396 $ (4,483 ) $ 204,836
Held-to-maturity Securities	December 31, 2016 Amortized Cost Gross Unrealized Gains Gross Unrealized Losses Fair Value (In thousands) Securities Held to Maturity: Debt securities: Government-sponsored enterprises $ 32,667 $ 4 $ (934 ) $ 31,737 Government-sponsored mortgage-backed and collateralized mortgage obligations 153,938 14 (1,806 ) 152,146 SBA asset-backed securities 14,422 — (212 ) 14,210 Total securities held to maturity $ 201,027 $ 18 $ (2,952 ) $ 198,093 March 31, 2017 Amortized Cost Gross Unrealized Gains Gross Unrealized Losses Fair Value (In thousands) Securities Held to Maturity: Debt securities: Government-sponsored enterprises $ 32,670 $ 2 $ (832 ) $ 31,840 Government-sponsored mortgage-backed and collateralized mortgage obligations 155,214 33 (1,718 ) 153,529 SBA asset-backed securities 13,800 — (193 ) 13,607 Total securities held to maturity $ 201,684 $ 35 $ (2,743 ) $ 198,976
Investments Classified by Contractual Maturity Date	The amortized cost and estimated fair value of debt securities by contractual maturity at March 31, 2017 are included in the following table. Expected maturities will differ from contractual maturities because the issuers may have the right to call or prepay obligations with or without call or prepayment penalties. Available for Sale Held to Maturity Amortized Cost Fair Value Amortized Cost Fair Value (In thousands) Within 1 year $ 4,785 $ 4,789 $ 5,005 $ 5,001 After 1 year through 5 years 66,244 66,467 9,688 9,497 After 5 years through 10 years 69,528 69,182 17,977 17,342 After 10 years 7,643 7,815 — — 148,200 148,253 32,670 31,840 Mortgage- and asset-backed securities and collateralized mortgage obligations 16,459 16,329 169,014 167,136 $ 164,659 $ 164,582 $ 201,684 $ 198,976
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: March 31, 2017 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 $ (8 ) $ 1,764 $ (13 ) $ 5,018 Other asset-backed securities (31 ) 3,934 (84 ) 3,794 Total mortgage- and other asset-backed securities (39 ) 5,698 (97 ) 8,812 Municipal bonds (157 ) 5,292 — — Financial services: Banks (249 ) 13,220 — — Diversified financials (127 ) 8,626 — — Insurance and REITs (183 ) 4,641 — — Total financial services (559 ) 26,487 — — Other corporate: Industrials (530 ) 16,110 (84 ) 2,255 Utilities (111 ) 16,860 — — Total other corporate (641 ) 32,970 (84 ) 2,255 Total debt securities (1,396 ) 70,447 (181 ) 11,067 Marketable equity securities (350 ) 4,409 (21 ) 445 Total temporarily impaired available-for-sale securities $ (1,746 ) $ 74,856 $ (202 ) $ 11,512 December 31, 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 securities $ (11 ) $ 3,163 $ (30 ) $ 7,326 Other asset-backed securities (43 ) 3,924 (152 ) 3,732 Total mortgage- and other asset-backed securities (54 ) 7,087 (182 ) 11,058 Municipal bonds (157 ) 5,301 — — Financial services: Banks (298 ) 14,553 — — Diversified financials (198 ) 9,369 — — Insurance and REITs (216 ) 6,900 — — Total financial services (712 ) 30,822 — — Other corporate: Industrials (655 ) 24,630 (106 ) 2,284 Utilities (99 ) 11,200 (1 ) 794 Total other corporate (754 ) 35,830 (107 ) 3,078 Total debt securities (1,677 ) 79,040 (289 ) 14,136 Marketable equity securities: Mutual funds: Domestic community — — (19 ) 448 Global asset allocation (424 ) 15,153 (2,074 ) 22,442 Total marketable equity securities (424 ) 15,153 (2,093 ) 22,890 Total temporarily impaired available-for-sale securities $ (2,101 ) $ 94,193 $ (2,382 ) $ 37,026
Unrealized Gain (Loss) and Fair Value of Investments - Held-to-maturity Securities	December 31, 2016 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: Government-sponsored enterprises $ (934 ) $ 28,533 $ — $ — Government-sponsored mortgage-backed and collateralized mortgage obligations (1,763 ) 146,098 (43 ) 3,827 SBA asset-backed securities (104 ) 9,157 (108 ) 5,053 Total temporarily impaired held-to-maturity securities $ (2,801 ) $ 183,788 $ (151 ) $ 8,880 Securities Held to Maturity: Debt securities: Government-sponsored enterprises $ (832 ) $ 30,645 $ — $ — Government-sponsored mortgage-backed and collateralized mortgage obligations (1,682 ) 135,636 (36 ) 3,873 SBA asset-backed securities (87 ) 8,622 (106 ) 4,985 Total temporarily impaired held-to-maturity securities $ (2,601 ) $ 174,903 $ (142 ) $ 8,858

Loans and The Allowance for L25

Loans and The Allowance for Loan Losses (Tables)	3 Months Ended
	Mar. 31, 2017
Receivables [Abstract]
Schedule of Accounts, Notes, Loans and Financing Receivable	A summary of the balances of loans follows: March 31, December 31, 2017 2016 (In thousands) Real estate: 1-4 family residential $ 893,569 $ 851,154 Home equity 79,975 78,719 Commercial real estate 702,122 687,289 Construction 71,165 76,351 1,746,831 1,693,513 Commercial business 210,738 206,234 Consumer 26,978 29,281 Total loans 1,984,547 1,929,028 Allowance for loan losses (18,875 ) (18,750 ) Discount and fair value adjustments on purchased loans (1,804 ) (1,846 ) Deferred loan costs and fees, net 4,606 4,439 Loans, net $ 1,968,474 $ 1,912,871
Activity in Allowance for Loan Losses	Activity in the allowance for loan losses for the three months ended March 31, 2017 and 2016 , by loan segment, follows: 1-4 Family Home Commercial Construction Commercial Consumer Unallocated Total (In thousands) Three Months Ended March 31, 2017 Allowance at December 31, 2016 $ 4,846 $ 537 $ 8,374 $ 1,353 $ 3,206 $ 434 $ — $ 18,750 Provision (credit) for loan losses 80 21 (41 ) 104 (89 ) (18 ) — 57 Loans charged-off — — — — — (15 ) — (15 ) Recoveries 74 — — — 9 — — 83 Allowance at March 31, 2017 $ 5,000 $ 558 $ 8,333 $ 1,457 $ 3,126 $ 401 $ — $ 18,875 Three Months Ended March 31, 2016 Allowance at December 31, 2015 $ 3,916 $ 636 $ 7,147 $ 1,364 $ 2,839 $ 772 $ 428 $ 17,102 Provision (credit) for loan losses (251 ) (19 ) 191 258 (148 ) (55 ) (3 ) (27 ) Loans charged-off — — — — (105 ) (18 ) — (123 ) Recoveries — — — — 33 — — 33 Allowance at March 31, 2016 $ 3,665 $ 617 $ 7,338 $ 1,622 $ 2,619 $ 699 $ 425 $ 16,985
Allowance for Credit Losses on Financing Receivables	Additional information pertaining to the allowance for loan losses at March 31, 2017 and December 31, 2016 is as follows: 1-4 Family Home Commercial Construction Commercial Consumer Unallocated Total (In thousands) March 31, 2017 Allowance related to impaired loans $ 16 $ — $ — $ — $ — $ — $ — $ 16 Allowance related to non-impaired loans 4,984 558 8,333 1,457 3,126 401 — 18,859 Total allowance for loan losses $ 5,000 $ 558 $ 8,333 $ 1,457 $ 3,126 $ 401 $ — $ 18,875 Impaired loans $ 6,513 $ 1,388 $ 5,073 $ — $ 224 $ 155 $ — $ 13,353 Non-impaired loans 887,056 78,587 697,049 71,165 210,514 26,823 — 1,971,194 Total loans $ 893,569 $ 79,975 $ 702,122 $ 71,165 $ 210,738 $ 26,978 $ — $ 1,984,547 December 31, 2016 Allowance related to impaired loans $ 17 $ — $ — $ — $ — $ — $ — $ 17 Allowance related to non-impaired loans 4,829 537 8,374 1,353 3,206 434 — 18,733 Total allowance for loan losses $ 4,846 $ 537 $ 8,374 $ 1,353 $ 3,206 $ 434 $ — $ 18,750 Impaired loans $ 6,726 $ 1,153 $ 941 $ — $ 241 $ 170 $ — $ 9,231 Non-impaired loans 844,428 77,566 686,348 76,351 205,993 29,111 — 1,919,797 Total loans $ 851,154 $ 78,719 $ 687,289 $ 76,351 $ 206,234 $ 29,281 $ — $ 1,929,028
Past Due Financing Receivables	The following is a summary of past due and non-accrual loans, by loan class, at March 31, 2017 and December 31, 2016 : 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) March 31, 2017 Real estate: 1-4 family residential $ 2,112 $ 211 $ 1,636 $ 3,959 $ 6,269 Home equity 867 — 587 1,454 1,388 Commercial real estate — — 4,149 4,149 5,073 Commercial business 4,676 — — 4,676 224 Consumer 46 389 79 514 155 Total $ 7,701 $ 600 $ 6,451 $ 14,752 $ 13,109 December 31, 2016 Real estate: 1-4 family residential $ 584 $ 373 $ 2,322 $ 3,279 $ 6,478 Home equity 452 496 775 1,723 1,153 Commercial real estate 1,393 — — 1,393 941 Commercial business 4,996 13 — 5,009 241 Consumer 175 5 7 187 170 Total $ 7,600 $ 887 $ 3,104 $ 11,591 $ 8,983
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 March 31, 2017 (In thousands) Real estate: 1-4 family residential $ 6,620 $ 78 Home equity 1,087 14 Commercial real estate 3,007 8 Commercial 232 3 Consumer 167 1 Total $ 11,113 $ 104 Three Months Ended March 31, 2016 Real estate: 1-4 family residential $ 6,321 $ 73 Home equity 290 4 Commercial real estate 4,474 42 Commercial 5 — Consumer 177 2 Total $ 11,267 $ 121 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 March 31, 2017 (In thousands) Impaired loans without a valuation allowance: Real estate: 1-4 family residential $ 6,395 $ 6,739 $ — Home equity 1,388 1,455 — Commercial real estate 5,073 5,468 — Commercial business 224 3,288 — Consumer 155 166 — Total 13,235 17,116 — Impaired loans with a valuation allowance: 1-4 family residential 118 310 16 Total impaired loans $ 13,353 $ 17,426 $ 16 December 31, 2016 Impaired loans without a valuation allowance: Real estate: 1-4 family residential $ 6,605 $ 7,023 $ — Home equity 1,153 1,225 — Commercial real estate 941 1,207 — Commercial business 241 3,279 — Consumer 170 183 — Total 9,110 12,917 — Impaired loans with a valuation allowance: 1-4 family residential 121 313 17 Total impaired loans $ 9,231 $ 13,230 $ 17
Financing Receivable Credit Quality Indicators	The following tables present the Company’s loans by risk rating at March 31, 2017 and December 31, 2016 : 1-4 Family Residential Home Equity Commercial Real Estate Construction Commercial Business Consumer Total Loans (In thousands) March 31, 2017 Loans rated 1 - 6 $ 1,046 $ 288 $ 693,062 $ 71,165 $ 194,471 $ 4 $ 960,036 Loans rated 7 3,509 1,343 3,812 — 16,259 145 25,068 Loans rated 8 2,419 112 5,248 — 8 12 7,799 Loans rated 9 460 — — — — — 460 Loans rated 10 — — — — — — — Loans not rated 886,135 78,232 — — — 26,817 991,184 $ 893,569 $ 79,975 $ 702,122 $ 71,165 $ 210,738 $ 26,978 $ 1,984,547 December 31, 2016 Loans rated 1 - 6 $ 1,054 $ 293 $ 671,872 $ 76,351 $ 188,706 $ 4 $ 938,280 Loans rated 7 3,514 967 9,720 — 17,510 146 31,857 Loans rated 8 2,442 258 5,697 — 18 37 8,452 Loans rated 9 645 — — — — — 645 Loans rated 10 — — — — — — — Loans not rated 843,499 77,201 — — — 29,094 949,794 $ 851,154 $ 78,719 $ 687,289 $ 76,351 $ 206,234 $ 29,281 $ 1,929,028

Derivatives (Tables)

Derivatives (Tables)	3 Months Ended
	Mar. 31, 2017
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 March 31, 2017 and December 31, 2016 . Derivative Gains Derivative Losses Notional Amount Fair Value Notional Amount Fair Value (In thousands) March 31, 2017 Economic hedges: Commercial loan level interest rate swap agreements $ 426,021 $ 8,602 $ 426,021 $ 8,602 Other contracts 15,746 — 32,873 — Total derivatives $ 441,767 $ 8,602 $ 458,894 $ 8,602 December 31, 2016 Economic hedges: Commercial loan level interest rate swap agreements $ 419,488 $ 9,016 $ 419,488 $ 8,932 Other contracts 15,685 8 33,045 56 Total derivatives $ 435,173 $ 9,024 $ 452,533 $ 8,988

Deposits (Tables)

Deposits (Tables)	3 Months Ended
	Mar. 31, 2017
Banking and Thrift [Abstract]
Schedule of Deposit Balances	A summary of deposit balances, by type, is as follows: March 31, December 31, 2017 2016 (In thousands) NOW and demand $ 342,118 $ 331,508 Regular savings 265,116 262,984 Money market 622,852 573,204 Brokered money market 50,129 53,357 Total non-certificate accounts 1,280,215 1,221,053 Term certificates of $250,000 or more 82,814 77,550 Term certificates less than $250,000 265,228 262,564 Brokered term certificates 228,465 247,520 Total term certificate accounts 576,507 587,634 Total deposits $ 1,856,722 $ 1,808,687
Schedule of Contractual Maturities of Deposits and Weighted Average Rate	At March 31, 2017 , the scheduled maturities of term certificate accounts, including brokered deposits, are as follows: Amount Weighted Average Rate (Dollars in thousands) Within 1 year $ 346,078 0.73 % 1-2 years 95,556 1.28 2-3 years 87,624 1.78 3-4 years 25,626 1.83 4 years and beyond 21,623 1.71 $ 576,507 1.07 %

Fair Value Measurements (Tables

Fair Value Measurements (Tables)	3 Months Ended
	Mar. 31, 2017
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) March 31, 2017 Assets Securities available for sale: Debt securities $ — $ 164,582 $ — $ 164,582 Marketable equity securities 9,252 — — 9,252 Derivative assets: Interest rate swap agreements — 8,602 — 8,602 Forward loan sale commitments — — 37 37 Mortgage loan commitments — — 275 275 Total assets $ 9,252 $ 173,184 $ 312 $ 182,748 Liabilities Derivative liabilities: Interest rate swap agreements $ — $ 8,602 $ — $ 8,602 Forward loan sale commitments — — 35 35 Mortgage loan commitments — — 37 37 Total liabilities $ — $ 8,602 $ 72 $ 8,674 December 31, 2016 Assets Securities available for sale: Debt securities $ — $ 161,668 $ — $ 161,668 Marketable equity securities 43,168 — — 43,168 Derivative assets: Interest rate swap agreements — 9,024 — 9,024 Forward loan sale commitments — — 15 15 Mortgage loan commitments — — 111 111 Total assets $ 43,168 $ 170,692 $ 126 $ 213,986 Liabilities Derivative liabilities: Interest rate swap agreements $ — $ 8,988 $ — $ 8,988 Forward loan sale commitments — — 74 74 Mortgage loan commitments — — 3 3 Total liabilities $ — $ 8,988 $ 77 $ 9,065
Fair Value Measurements, Nonrecurring	The following table summarizes the fair value hierarchy applicable to assets measured at fair value on a non-recurring basis: March 31, 2017 December 31, 2016 Level 1 Level 2 Level 3 Level 1 Level 2 Level 3 (In thousands) Impaired loans $ — $ — $ 151 $ — $ — $ 136 The following table summarizes the total gains on assets measured at fair value on a non-recurring basis for the three months ended March 31, 2017 and 2016 . Three Months Ended March 31, 2017 2016 (In thousands) Impaired loans $ 77 $ 221
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) March 31, 2017 Financial assets: Cash and cash equivalents $ 35,149 $ 35,149 $ — $ — $ 35,149 Securities available for sale 173,834 9,252 164,582 — 173,834 Securities held to maturity 201,684 — 198,976 — 198,976 Federal Home Loan Bank stock 14,828 — — 14,828 14,828 Loans and loans held for sale 1,970,149 — — 1,960,134 1,960,134 Accrued interest receivable 5,994 — — 5,994 5,994 Financial liabilities: Deposits 1,856,722 — — 1,856,153 1,856,153 Borrowings 223,000 — 222,512 — 222,512 On-balance sheet derivative financial instruments: Derivative assets: Interest rate swap agreements 8,602 — 8,602 — 8,602 Forward loan sale commitments 37 — — 37 37 Mortgage loan commitments 275 — — 275 275 Derivative liabilities: Interest rate swap agreements 8,602 — 8,602 — 8,602 Forward loan sale commitments 35 — — 35 35 Mortgage loan commitments 37 — — 37 37 December 31, 2016 Financial assets: Cash and cash equivalents $ 30,496 $ 30,496 $ — $ — $ 30,496 Securities available for sale 204,836 43,168 161,668 — 204,836 Securities held to maturity 201,027 — 198,093 — 198,093 Federal Home Loan Bank stock 13,352 — — 13,352 13,352 Loans and loans held for sale 1,915,632 — — 1,903,978 1,903,978 Accrued interest receivable 6,057 — — 6,057 6,057 Financial liabilities: Deposits 1,808,687 — — 1,808,629 1,808,629 Borrowings 251,000 — 250,648 — 250,648 On-balance sheet derivative financial instruments: Derivative assets: Interest rate swap agreements 9,024 — 9,024 — 9,024 Forward loan sale commitments 15 — — 15 15 Mortgage loan commitments 111 — — 111 111 Derivative liabilities: Interest rate swap agreements 8,988 — 8,988 — 8,988 Forward loan sale commitments 74 — — 74 74 Mortgage loan commitments 3 — — 3 3

Comprehensive Income (Tables)

Comprehensive Income (Tables)	3 Months Ended
	Mar. 31, 2017
Equity [Abstract]
Schedule of Accumulated Other Comprehensive Loss	The components of accumulated other comprehensive loss, included in stockholders' equity, are as follows: March 31, December 31, 2017 2016 (In thousands) Securities available for sale: Net unrealized loss $ (262 ) $ (3,087 ) Tax effect 103 1,007 Net-of-tax amount (159 ) (2,080 ) Securities held to maturity: Net unrealized gain on transferred securities 314 337 Tax effect (118 ) (114 ) Net-of-tax amount 196 223 Defined benefit pension plan: Unrecognized net actuarial loss (3,393 ) (3,482 ) Tax effect 1,211 1,270 Net-of-tax amount (2,182 ) (2,212 ) $ (2,145 ) $ (4,069 ) Changes in accumulated other comprehensive income (loss), by component, follow: Three Months Ended March 31, 2017 Securities Available for Sale Securities Held to Maturity Defined Benefit Pension Plan Total (In thousands) Balance at December 31, 2016 $ (2,080 ) $ 223 $ (2,212 ) $ (4,069 ) Other comprehensive income before reclassification adjustments 1,803 — — 1,803 Reclassification adjustments: Net realized losses 1,022 — — 1,022 Amortization of actuarial losses — — 89 89 Amortization of amounts previously recorded upon transfer from available for sale — (23 ) — (23 ) Tax effects (904 ) (4 ) (59 ) (967 ) Net current-period other comprehensive income (loss) 1,921 (27 ) 30 1,924 Balance at March 31, 2017 $ (159 ) $ 196 $ (2,182 ) $ (2,145 ) Three Months Ended March 31, 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 loss before reclassification adjustments 3,415 — — 3,415 Reclassification adjustments: Net realized losses 289 — — 289 Amortization of actuarial losses — — 68 68 Amortization of amounts previously recorded upon transfer from available for sale — (70 ) — (70 ) Tax effects (1,294 ) 25 (24 ) (1,293 ) Net current-period other comprehensive income (loss) 2,410 (45 ) 44 2,409 Balance at March 31, 2016 $ (1,346 ) $ 329 $ (1,762 ) $ (2,779 )

Stockholders' Equity (Tables)

Stockholders' Equity (Tables)	3 Months Ended
	Mar. 31, 2017
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 March 31, 2017 and December 31, 2016 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.: March 31, 2017 Total capital (to risk weighted assets) $ 405,534 20.4 % $ 158,655 8.0 % 198,318 10.0 % Tier 1 capital (to risk weighted assets) 386,659 19.5 118,991 6.0 158,655 8.0 Common equity Tier 1 (to risk weighted assets) 386,659 19.5 89,243 4.5 128,907 6.5 Tier 1 capital (to average assets) 386,659 15.6 98,895 4.0 123,619 5.0 December 31, 2016 Total capital (to risk weighted assets) $ 395,325 20.5 % $ 154,471 8.0 % 193,089 10.0 % Tier 1 capital (to risk weighted assets) 376,575 19.5 115,854 6.0 154,471 8.0 Common equity Tier 1 (to risk weighted assets) 376,575 19.5 86,890 4.5 125,508 6.5 Tier 1 capital (to average assets) 376,575 16.0 94,166 4.0 117,708 5.0 Blue Hills Bank: March 31, 2017 Total capital (to risk weighted assets) $ 325,098 16.4 % $ 158,418 8.0 % $ 198,023 10.0 % Tier 1 capital (to risk weighted assets) 306,223 15.5 118,814 6.0 158,418 8.0 Common equity Tier 1 (to risk weighted assets) 306,223 15.5 89,110 4.5 128,715 6.5 Tier 1 capital (to average assets) 306,223 12.4 98,897 4.0 123,622 5.0 December 31, 2016 Total capital (to risk weighted assets) $ 313,457 16.3 % $ 154,196 8.0 % $ 192,745 10.0 % Tier 1 capital (to risk weighted assets) 294,707 15.3 115,647 6.0 154,196 8.0 Common equity Tier 1 (to risk weighted assets) 294,707 15.3 86,735 4.5 125,284 6.5 Tier 1 capital (to average assets) 294,707 12.5 94,099 4.0 117,623 5.0

Employee Stock Ownership Plan (

Employee Stock Ownership Plan (Tables)	3 Months Ended
	Mar. 31, 2017
Compensation and Retirement Disclosure [Abstract]
Employee Stock Ownership Plan (ESOP) Disclosures	Shares held by the ESOP include the following: March 31, 2017 December 31, 2016 Allocated 225,247 149,613 Committed to be allocated 18,718 75,912 Unallocated 2,030,890 2,049,608 2,274,855 2,275,133

Earnings Per Common Share (Tabl

Earnings Per Common Share (Tables)	3 Months Ended
	Mar. 31, 2017
Earnings Per Share [Abstract]
Schedule of Earnings Per Share, Basic and Diluted	Three Months Ended March 31, 2017 2016 (In thousands, except share amounts) Net income applicable to common stock $ 7,487 $ 1,667 Average number of common shares outstanding 26,842,047 28,176,619 Less: Average unallocated ESOP shares (2,040,249 ) (2,115,383 ) Less: Average unvested restricted stock awards (890,379 ) (995,150 ) Average number of common shares outstanding used to calculate basic earnings per common share 23,911,419 25,066,086 Effect of dilutive stock options 139,392 — Effect of dilutive unvested restricted stock awards 224,854 66,355 Average number of common shares outstanding used to calculate diluted earnings per common share 24,275,665 25,132,441 Earnings per common share: Basic $ 0.31 $ 0.07 Diluted $ 0.31 $ 0.07

Share-Based Compensation (Table

Share-Based Compensation (Tables)	3 Months Ended
	Mar. 31, 2017
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 three months ended March 31, 2017 . Options granted 362,100 Vesting period (years) 5 Term (years) 10 Expected volatility 27.22%-27.43% Expected life (years) 6.5 Expected dividend yield 0.71%-1.11% Risk free interest rate 2.04%-2.16% Fair value per option $5.05-$5.31
Schedule of Share-based Compensation, Stock Options, Activity	A summary of the status of the Company's stock option grants for the three months ended March 31, 2017 , 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, 2016 2,449,670 $ 14.06 — $ — Granted 362,100 18.24 — — Forfeited (150,500 ) 14.07 — — Exercised (13,000 ) 13.84 — — Outstanding at March 31, 2017 2,648,270 $ 14.64 8.71 $ 8,653,603 Exercisable at March 31, 2017 493,890 $ 14.07 8.53 $ 1,866,904 Unrecognized compensation cost at March 31, 2017 $ 8,502,000 Weighted average remaining recognition period (years) 3.81
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 three months ended March 31, 2017 : Outstanding Restricted Stock Awards Weighted Average Grant Price Nonvested stock awards at December 31, 2016 816,070 $ 14.06 Granted 175,695 18.25 Vested (21,873 ) 13.98 Forfeited (84,417 ) 14.07 Nonvested stock awards at March 31, 2017 885,475 $ 14.89 Unrecognized compensation cost inclusive of directors' fees at March 31, 2017 $11,907,000 Weighted average remaining recognition period (years) 3.90

Basis of Presentation and Con34

Basis of Presentation and Consolidation (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2017	Dec. 31, 2016
Subsidiary or Equity Method Investee [Line Items]
Tax benefit from adoption of ASU	$ 39
1-4 Family Residential
Subsidiary or Equity Method Investee [Line Items]
Origination covenants, maximum loan-to-value ratio (greater than) (percent)	80.00%
Retained earnings
Subsidiary or Equity Method Investee [Line Items]
Cumulative effect on change in accounting principle		$ (27)
ASU 2016-09 | Retained earnings
Subsidiary or Equity Method Investee [Line Items]
Cumulative effect on change in accounting principle		$ 27

Securities - Available-for-sale

Securities - Available-for-sale Securities (Details) - USD ($) $ in Thousands	Mar. 31, 2017	Dec. 31, 2016
Debt securities:
Amortized Cost	$ 164,659	$ 162,311
Gross Unrealized Gains	1,500	1,323
Gross Unrealized Losses	(1,577)	(1,966)
Fair Value	164,582	161,668
Marketable equity securities:
Amortized Cost	9,437	45,612
Gross Unrealized Gains	186	73
Gross Unrealized Losses	(371)	(2,517)
Fair Value	9,252	43,168
Available-for-sale securities:
Amortized Cost	174,096	207,923
Gross Unrealized Gains	1,686	1,396
Gross Unrealized Losses	(1,948)	(4,483)
Fair Value	173,834	204,836
Total mortgage- and other asset-backed securities
Debt securities:
Amortized Cost	16,459	19,704
Gross Unrealized Gains	6	6
Gross Unrealized Losses	(136)	(236)
Fair Value	16,329	19,474
Privately issued commercial mortgage- backed securities
Debt securities:
Amortized Cost	7,293	10,530
Gross Unrealized Gains	1	0
Gross Unrealized Losses	(21)	(41)
Fair Value	7,273	10,489
Other asset-backed securities
Debt securities:
Amortized Cost	9,166	9,174
Gross Unrealized Gains	5	6
Gross Unrealized Losses	(115)	(195)
Fair Value	9,056	8,985
Municipal bonds
Debt securities:
Amortized Cost	12,318	12,730
Gross Unrealized Gains	182	120
Gross Unrealized Losses	(157)	(157)
Fair Value	12,343	12,693
Domestic community
Marketable equity securities:
Amortized Cost		3,216
Gross Unrealized Gains		25
Gross Unrealized Losses		(19)
Fair Value		3,222
Global asset allocation
Marketable equity securities:
Amortized Cost		42,396
Gross Unrealized Gains		48
Gross Unrealized Losses		(2,498)
Fair Value		39,946
Other Corporate | Corporate debt securities
Debt securities:
Amortized Cost	74,408	74,112
Gross Unrealized Gains	860	800
Gross Unrealized Losses	(725)	(861)
Fair Value	74,543	74,051
Industrials | Corporate debt securities
Debt securities:
Amortized Cost	48,506	49,217
Gross Unrealized Gains	571	508
Gross Unrealized Losses	(614)	(761)
Fair Value	48,463	48,964
Utilities | Corporate debt securities
Debt securities:
Amortized Cost	25,902	24,895
Gross Unrealized Gains	289	292
Gross Unrealized Losses	(111)	(100)
Fair Value	26,080	25,087
Financial Services | Corporate debt securities
Debt securities:
Amortized Cost	61,474	55,765
Gross Unrealized Gains	452	397
Gross Unrealized Losses	(559)	(712)
Fair Value	61,367	55,450
Banks | Corporate debt securities
Debt securities:
Amortized Cost	24,408	20,263
Gross Unrealized Gains	69	57
Gross Unrealized Losses	(249)	(298)
Fair Value	24,228	20,022
Diversified Financials | Corporate debt securities
Debt securities:
Amortized Cost	18,803	17,198
Gross Unrealized Gains	227	190
Gross Unrealized Losses	(127)	(198)
Fair Value	18,903	17,190
Insurance and REITs | Corporate debt securities
Debt securities:
Amortized Cost	18,263	18,304
Gross Unrealized Gains	156	150
Gross Unrealized Losses	(183)	(216)
Fair Value	$ 18,236	$ 18,238

Securities - Held-to-maturity S

Securities - Held-to-maturity Securities (Details) - USD ($) $ in Thousands	Mar. 31, 2017	Dec. 31, 2016
Debt securities:
Amortized Cost	$ 201,684	$ 201,027
Gross Unrealized Gains	35	18
Gross Unrealized Losses	(2,743)	(2,952)
Fair Value	198,976	198,093
Government-sponsored enterprises
Debt securities:
Amortized Cost	32,670	32,667
Gross Unrealized Gains	2	4
Gross Unrealized Losses	(832)	(934)
Fair Value	31,840	31,737
Government-sponsored mortgage-backed and collateralized mortgage obligations
Debt securities:
Amortized Cost	155,214	153,938
Gross Unrealized Gains	33	14
Gross Unrealized Losses	(1,718)	(1,806)
Fair Value	153,529	152,146
SBA asset-backed securities
Debt securities:
Amortized Cost	13,800	14,422
Gross Unrealized Gains	0	0
Gross Unrealized Losses	(193)	(212)
Fair Value	$ 13,607	$ 14,210

Securities - Schedule of Contra

Securities - Schedule of Contractual Maturities of Securities (Details) - USD ($) $ in Thousands	Mar. 31, 2017	Dec. 31, 2016
Available-for-sale Securities, Amortized Cost Basis [Abstract]
Within 1 year, Available for Sale, Amortized Cost	$ 4,785
After 1 year through 5 years, Available for Sale, Amortized Cost	66,244
After 5 years through 10 years, Available for Sale, Amortized Cost	69,528
After 10 years, Available for Sale, Amortized Cost	7,643
Single Maturity Date, Available for Sale, Amortized Cost	148,200
Mortgage- and asset-backed securities and collateralized mortgage obligations - Amortized Basis	16,459
Amortized Cost	164,659	$ 162,311
Available-for-sale Securities, Debt Maturities, Fair Value, Fiscal Year Maturity [Abstract]
Within 1 year, Available for Sale, Fair Value	4,789
After 1 year through 5 years, Available for Sale, Fair Value	66,467
After 5 years through 10 years, Available for Sale, Fair Value	69,182
After 10 years, Available for Sale, Fair Value	7,815
Single Maturity Date, Available for Sale, Fair Value	148,253
Mortgage- and asset-backed securities and collateralized mortgage obligations - Fair Value	16,329
Available-for-sale securities, total debt securities	164,582	161,668
Held-to-maturity Securities, Debt Maturities, Single Maturity Date, Amortized Cost Basis [Abstract]
Within 1 year, Held to Maturity, Amortized Cost	5,005
After 1 year through 5 years, Held to Maturity, Amortized Cost	9,688
After 5 years through 10 years, Held to Maturity, Amortized Cost	17,977
After 10 years, Held to Maturity, Amortized Cost	0
Single Maturity Date, Held to Maturity, Amortized Cost	32,670
Mortgage- and asset-backed securities and collateralized mortgage obligations - Amortized Basis	169,014
Amortized Cost	201,684	201,027
Held-to-maturity Securities, Debt Maturities, Single Maturity Date, Fair Value [Abstract]
Within 1 year, Held to Maturity, Fair Value	5,001
After 1 year through 5 years, Held to Maturity, Fair Value	9,497
After 5 years through 10 years, Held to Maturity, Fair Value	17,342
After 10 years, Held to Maturity, Fair Value	0
Single Maturity Date, Held to Maturity, Fair Value	31,840
Mortgage- and asset-backed securities and collateralized mortgage obligations - Fair Value	167,136
Held-to-maturity securities, total debt securities	$ 198,976	$ 198,093

Securities - Available-for-sa38

Securities - Available-for-sale Securities Unrealized Loss (Details) - USD ($) $ in Thousands	Mar. 31, 2017	Dec. 31, 2016
Available-for-sale Securities, Continuous Unrealized Loss Position, Aggregate Loss [Abstract]
Gross Unrealized Losses - Less than twelve months	$ (1,746)	$ (2,101)
Gross Unrealized Losses - More than twelve months	(202)	(2,382)
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value [Abstract]
Fair Value - Less than twelve months	74,856	94,193
Fair Value - More than twelve months	11,512	37,026
Total debt securities
Available-for-sale Securities, Continuous Unrealized Loss Position, Aggregate Loss [Abstract]
Gross Unrealized Losses - Less than twelve months	(1,396)	(1,677)
Gross Unrealized Losses - More than twelve months	(181)	(289)
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value [Abstract]
Fair Value - Less than twelve months	70,447	79,040
Fair Value - More than twelve months	11,067	14,136
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	(39)	(54)
Gross Unrealized Losses - More than twelve months	(97)	(182)
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value [Abstract]
Fair Value - Less than twelve months	5,698	7,087
Fair Value - More than twelve months	8,812	11,058
Privately issued commercial mortgage- backed securities
Available-for-sale Securities, Continuous Unrealized Loss Position, Aggregate Loss [Abstract]
Gross Unrealized Losses - Less than twelve months	(8)	(11)
Gross Unrealized Losses - More than twelve months	(13)	(30)
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value [Abstract]
Fair Value - Less than twelve months	1,764	3,163
Fair Value - More than twelve months	5,018	7,326
Other asset-backed securities
Available-for-sale Securities, Continuous Unrealized Loss Position, Aggregate Loss [Abstract]
Gross Unrealized Losses - Less than twelve months	(31)	(43)
Gross Unrealized Losses - More than twelve months	(84)	(152)
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value [Abstract]
Fair Value - Less than twelve months	3,934	3,924
Fair Value - More than twelve months	3,794	3,732
Municipal bonds
Available-for-sale Securities, Continuous Unrealized Loss Position, Aggregate Loss [Abstract]
Gross Unrealized Losses - Less than twelve months	(157)	(157)
Gross Unrealized Losses - More than twelve months	0	0
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value [Abstract]
Fair Value - Less than twelve months	5,292	5,301
Fair Value - More than twelve months	0	0
Total marketable equity securities
Available-for-sale Securities, Continuous Unrealized Loss Position, Aggregate Loss [Abstract]
Gross Unrealized Losses - Less than twelve months	(350)	(424)
Gross Unrealized Losses - More than twelve months	(21)	(2,093)
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value [Abstract]
Fair Value - Less than twelve months	4,409	15,153
Fair Value - More than twelve months	445	22,890
Domestic community
Available-for-sale Securities, Continuous Unrealized Loss Position, Aggregate Loss [Abstract]
Gross Unrealized Losses - Less than twelve months		0
Gross Unrealized Losses - More than twelve months		(19)
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value [Abstract]
Fair Value - Less than twelve months		0
Fair Value - More than twelve months		448
Global asset allocation
Available-for-sale Securities, Continuous Unrealized Loss Position, Aggregate Loss [Abstract]
Gross Unrealized Losses - Less than twelve months		(424)
Gross Unrealized Losses - More than twelve months		(2,074)
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value [Abstract]
Fair Value - Less than twelve months		15,153
Fair Value - More than twelve months		22,442
Other Corporate | Corporate debt securities
Available-for-sale Securities, Continuous Unrealized Loss Position, Aggregate Loss [Abstract]
Gross Unrealized Losses - Less than twelve months	(641)	(754)
Gross Unrealized Losses - More than twelve months	(84)	(107)
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value [Abstract]
Fair Value - Less than twelve months	32,970	35,830
Fair Value - More than twelve months	2,255	3,078
Industrials | Corporate debt securities
Available-for-sale Securities, Continuous Unrealized Loss Position, Aggregate Loss [Abstract]
Gross Unrealized Losses - Less than twelve months	(530)	(655)
Gross Unrealized Losses - More than twelve months	(84)	(106)
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value [Abstract]
Fair Value - Less than twelve months	16,110	24,630
Fair Value - More than twelve months	2,255	2,284
Utilities | Corporate debt securities
Available-for-sale Securities, Continuous Unrealized Loss Position, Aggregate Loss [Abstract]
Gross Unrealized Losses - Less than twelve months	(111)	(99)
Gross Unrealized Losses - More than twelve months	0	(1)
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value [Abstract]
Fair Value - Less than twelve months	16,860	11,200
Fair Value - More than twelve months	0	794
Financial Services | Corporate debt securities
Available-for-sale Securities, Continuous Unrealized Loss Position, Aggregate Loss [Abstract]
Gross Unrealized Losses - Less than twelve months	(559)	(712)
Gross Unrealized Losses - More than twelve months	0	0
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value [Abstract]
Fair Value - Less than twelve months	26,487	30,822
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	(249)	(298)
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	13,220	14,553
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	(127)	(198)
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	8,626	9,369
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	(183)	(216)
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	4,641	6,900
Fair Value - More than twelve months	$ 0	$ 0

Securities - Held-to-maturity39

Securities - Held-to-maturity Securities Unrealized Loss (Details) - USD ($) $ in Thousands	3 Months Ended	12 Months Ended
	Mar. 31, 2017	Dec. 31, 2015
Held-to-maturity Securities, Continuous Unrealized Loss Position, Aggregate Loss [Abstract]
Gross Unrealized Losses - Less than twelve months	$ (2,601)	$ (2,801)
Gross Unrealized Losses - More than twelve months	(142)	(151)
Held-to-maturity Securities, Continuous Unrealized Loss Position, Fair Value [Abstract]
Fair Value - Less than twelve months	174,903	183,788
Fair Value - More than twelve months	8,858	8,880
Government-sponsored enterprises
Held-to-maturity Securities, Continuous Unrealized Loss Position, Aggregate Loss [Abstract]
Gross Unrealized Losses - Less than twelve months	(832)	(934)
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	30,645	28,533
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	(1,682)	(1,763)
Gross Unrealized Losses - More than twelve months	(36)	(43)
Held-to-maturity Securities, Continuous Unrealized Loss Position, Fair Value [Abstract]
Fair Value - Less than twelve months	135,636	146,098
Fair Value - More than twelve months	3,873	3,827
SBA asset-backed securities
Held-to-maturity Securities, Continuous Unrealized Loss Position, Aggregate Loss [Abstract]
Gross Unrealized Losses - Less than twelve months	(87)	(104)
Gross Unrealized Losses - More than twelve months	(106)	(108)
Held-to-maturity Securities, Continuous Unrealized Loss Position, Fair Value [Abstract]
Fair Value - Less than twelve months	8,622	9,157
Fair Value - More than twelve months	$ 4,985	$ 5,053

Securities - Narrative (Details

Securities - Narrative (Details) $ in Thousands	3 Months Ended
	Mar. 31, 2017USD ($)mutual_fund	Mar. 31, 2016USD ($)
Schedule of Available-for-sale Securities [Line Items]
Proceeds from sale of available-for-sale securities	$ 44,855	$ 15,456
Available-for-sale securities, gross realized gains	267	178
Available-for-sale securities, gross realized losses	$ (1,300)	$ (422)
Depreciation, percentage of amortized cost basis	2.00%
Number of securities in loss positions | mutual_fund	2
Marketable equity securities
Schedule of Available-for-sale Securities [Line Items]
Depreciation, percentage of amortized cost basis	7.10%
Gross unrealized losses	$ 371

Loans and The Allowance for L41

Loans and The Allowance for Loan Losses - Summary of Loan balances (Details) - USD ($) $ in Thousands	Mar. 31, 2017	Dec. 31, 2016
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	$ 1,984,547	$ 1,929,028
Allowance for loan losses	(18,875)	(18,750)
Discount and fair value adjustments on purchased loans	(1,804)	(1,846)
Deferred loan costs and fees, net	4,606	4,439
Loans, net	1,968,474	1,912,871
Consumer and Commercial Portfolio Segment | Construction
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	71,165	76,351
Consumer, Excluding Consumer Other Portfolio Segment
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	1,746,831	1,693,513
Consumer, Excluding Consumer Other Portfolio Segment | 1-4 Family Residential
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	893,569	851,154
Consumer, Excluding Consumer Other Portfolio Segment | Home Equity
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	79,975	78,719
Consumer, Excluding Consumer Other Portfolio Segment | Commercial Real Estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	702,122	687,289
Commercial business
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	210,738	206,234
Consumer
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	$ 26,978	$ 29,281

Loans and The Allowance for L42

Loans and The Allowance for Loan Losses - Activity in Allowance for Loan Losses (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Loans and Leases Receivable, Beginning Allowance	$ 18,750	$ 17,102
Provision (credit) for loan losses	57	(27)
Loans charged-off	(15)	(123)
Recoveries	83	33
Loans and Leases Receivable, Ending Allowance	18,875	16,985
Unallocated
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Loans and Leases Receivable, Beginning Allowance	0	428
Provision (credit) for loan losses	0	(3)
Loans charged-off	0	0
Recoveries	0	0
Loans and Leases Receivable, Ending Allowance	0	425
Consumer, Excluding Consumer Other Portfolio Segment | 1-4 Family Residential
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Loans and Leases Receivable, Beginning Allowance	4,846	3,916
Provision (credit) for loan losses	80	(251)
Loans charged-off	0	0
Recoveries	74	0
Loans and Leases Receivable, Ending Allowance	5,000	3,665
Consumer, Excluding Consumer Other Portfolio Segment | Home Equity
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Loans and Leases Receivable, Beginning Allowance	537	636
Provision (credit) for loan losses	21	(19)
Loans charged-off	0	0
Recoveries	0	0
Loans and Leases Receivable, Ending Allowance	558	617
Consumer, Excluding Consumer Other Portfolio Segment | Commercial Real Estate
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Loans and Leases Receivable, Beginning Allowance	8,374	7,147
Provision (credit) for loan losses	(41)	191
Loans charged-off	0	0
Recoveries	0	0
Loans and Leases Receivable, Ending Allowance	8,333	7,338
Consumer and Commercial Portfolio Segment | Construction
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Loans and Leases Receivable, Beginning Allowance	1,353	1,364
Provision (credit) for loan losses	104	258
Loans charged-off	0	0
Recoveries	0	0
Loans and Leases Receivable, Ending Allowance	1,457	1,622
Commercial business
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Loans and Leases Receivable, Beginning Allowance	3,206	2,839
Provision (credit) for loan losses	(89)	(148)
Loans charged-off	0	(105)
Recoveries	9	33
Loans and Leases Receivable, Ending Allowance	3,126	2,619
Consumer
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Loans and Leases Receivable, Beginning Allowance	434	772
Provision (credit) for loan losses	(18)	(55)
Loans charged-off	(15)	(18)
Recoveries	0	0
Loans and Leases Receivable, Ending Allowance	$ 401	$ 699

Loans and The Allowance for L43

Loans and The Allowance for Loan Losses - Additional Activity in Allowance for Loan Losses (Details) - USD ($) $ in Thousands	Mar. 31, 2017	Dec. 31, 2016	Mar. 31, 2016	Dec. 31, 2015
Financing Receivable, Allowance for Credit Losses [Line Items]
Allowance related to impaired loans	$ 16	$ 17
Allowance related to non-impaired loans	18,859	18,733
Total allowance for loan losses	18,875	18,750	$ 16,985	$ 17,102
Impaired loans	13,353	9,231
Non-impaired loans	1,971,194	1,919,797
Total loans	1,984,547	1,929,028
Unallocated
Financing Receivable, Allowance for Credit Losses [Line Items]
Allowance related to impaired loans	0	0
Allowance related to non-impaired loans	0	0
Total allowance for loan losses	0	0	425	428
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	16	17
Allowance related to non-impaired loans	4,984	4,829
Total allowance for loan losses	5,000	4,846	3,665	3,916
Impaired loans	6,513	6,726
Non-impaired loans	887,056	844,428
Total loans	893,569	851,154
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	558	537
Total allowance for loan losses	558	537	617	636
Impaired loans	1,388	1,153
Non-impaired loans	78,587	77,566
Total loans	79,975	78,719
Consumer, Excluding Consumer Other Portfolio Segment | Commercial Real Estate
Financing Receivable, Allowance for Credit Losses [Line Items]
Allowance related to impaired loans	0	0
Allowance related to non-impaired loans	8,333	8,374
Total allowance for loan losses	8,333	8,374	7,338	7,147
Impaired loans	5,073	941
Non-impaired loans	697,049	686,348
Total loans	702,122	687,289
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	1,457	1,353
Total allowance for loan losses	1,457	1,353	1,622	1,364
Impaired loans	0	0
Non-impaired loans	71,165	76,351
Total loans	71,165	76,351
Commercial business
Financing Receivable, Allowance for Credit Losses [Line Items]
Allowance related to impaired loans	0	0
Allowance related to non-impaired loans	3,126	3,206
Total allowance for loan losses	3,126	3,206	2,619	2,839
Impaired loans	224	241
Non-impaired loans	210,514	205,993
Total loans	210,738	206,234
Consumer
Financing Receivable, Allowance for Credit Losses [Line Items]
Allowance related to impaired loans	0	0
Allowance related to non-impaired loans	401	434
Total allowance for loan losses	401	434	$ 699	$ 772
Impaired loans	155	170
Non-impaired loans	26,823	29,111
Total loans	$ 26,978	$ 29,281

Loans and The Allowance for L44

Loans and The Allowance for Loan Losses - Summary of Past Due and Non-accrual loans, by class (Details) - USD ($) $ in Thousands	Mar. 31, 2017	Dec. 31, 2016
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	$ 14,752	$ 11,591
Loans on Non-accrual	13,109	8,983
30-59 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	7,701	7,600
60-89 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	600	887
Past Due 90 Days or More
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	6,451	3,104
Consumer, Excluding Consumer Other Portfolio Segment | 1-4 Family Residential
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	3,959	3,279
Loans on Non-accrual	6,269	6,478
Consumer, Excluding Consumer Other Portfolio Segment | Home Equity
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	1,454	1,723
Loans on Non-accrual	1,388	1,153
Consumer, Excluding Consumer Other Portfolio Segment | Commercial Real Estate
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	4,149	1,393
Loans on Non-accrual	5,073	941
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	2,112	584
Consumer, Excluding Consumer Other Portfolio Segment | 30-59 Days Past Due | Home Equity
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	867	452
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	1,393
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	211	373
Consumer, Excluding Consumer Other Portfolio Segment | 60-89 Days Past Due | Home Equity
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	0	496
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	0
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	1,636	2,322
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	587	775
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	4,149	0
Commercial business
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	4,676	5,009
Loans on Non-accrual	224	241
Commercial business | 30-59 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	4,676	4,996
Commercial business | 60-89 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	0	13
Commercial business | Past Due 90 Days or More
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	0	0
Consumer
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	514	187
Loans on Non-accrual	155	170
Consumer | 30-59 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	46	175
Consumer | 60-89 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	389	5
Consumer | Past Due 90 Days or More
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	$ 79	$ 7

Loans and The Allowance for L45

Loans and The Allowance for Loan Losses - Summary of Impaired Loans (Details) - USD ($) $ in Thousands	Mar. 31, 2017	Dec. 31, 2016
Recorded Investment
Recorded Investment, without valuation allowance	$ 13,235	$ 9,110
Recorded Investment, total	13,353	9,231
Unpaid Principal Balance
Unpaid Principal Balance, without a valuation allowance	17,116	12,917
Unpaid Principal Balance, total	17,426	13,230
Related Allowance	16	17
1-4 Family Residential
Recorded Investment
Recorded Investment, with a valuation allowance	118	121
Unpaid Principal Balance
Unpaid Principal Balance, with a valuation allowance	310	313
Related Allowance	16	17
Consumer, Excluding Consumer Other Portfolio Segment | 1-4 Family Residential
Recorded Investment
Recorded Investment, without valuation allowance	6,395	6,605
Unpaid Principal Balance
Unpaid Principal Balance, without a valuation allowance	6,739	7,023
Consumer, Excluding Consumer Other Portfolio Segment | Home Equity
Recorded Investment
Recorded Investment, without valuation allowance	1,388	1,153
Unpaid Principal Balance
Unpaid Principal Balance, without a valuation allowance	1,455	1,225
Consumer, Excluding Consumer Other Portfolio Segment | Commercial Real Estate
Recorded Investment
Recorded Investment, without valuation allowance	5,073	941
Unpaid Principal Balance
Unpaid Principal Balance, without a valuation allowance	5,468	1,207
Commercial business
Recorded Investment
Recorded Investment, without valuation allowance	224	241
Unpaid Principal Balance
Unpaid Principal Balance, without a valuation allowance	3,288	3,279
Consumer
Recorded Investment
Recorded Investment, without valuation allowance	155	170
Unpaid Principal Balance
Unpaid Principal Balance, without a valuation allowance	$ 166	$ 183

Loans and The Allowance for L46

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
	Mar. 31, 2017	Mar. 31, 2016
Financing Receivable, Impaired [Line Items]
Average Recorded Investment	$ 11,113	$ 11,267
Interest Income Recognized	104	121
Consumer, Excluding Consumer Other Portfolio Segment | 1-4 Family Residential
Financing Receivable, Impaired [Line Items]
Average Recorded Investment	6,620	6,321
Interest Income Recognized	78	73
Consumer, Excluding Consumer Other Portfolio Segment | Home Equity
Financing Receivable, Impaired [Line Items]
Average Recorded Investment	1,087	290
Interest Income Recognized	14	4
Consumer, Excluding Consumer Other Portfolio Segment | Commercial Real Estate
Financing Receivable, Impaired [Line Items]
Average Recorded Investment	3,007	4,474
Interest Income Recognized	8	42
Consumer
Financing Receivable, Impaired [Line Items]
Average Recorded Investment	167	177
Interest Income Recognized	1	2
Commercial business
Financing Receivable, Impaired [Line Items]
Average Recorded Investment	232	5
Interest Income Recognized	$ 3	$ 0

Loans and The Allowance for L47

Loans and The Allowance for Loan Losses - Summary of Loan by Risk Rating (Details) - USD ($) $ in Thousands	Mar. 31, 2017	Dec. 31, 2016
Financing Receivable, Recorded Investment [Line Items]
Total loans	$ 1,984,547	$ 1,929,028
Loans rated 1 - 6
Financing Receivable, Recorded Investment [Line Items]
Total loans	960,036	938,280
Loans rated 7
Financing Receivable, Recorded Investment [Line Items]
Total loans	25,068	31,857
Loans rated 8
Financing Receivable, Recorded Investment [Line Items]
Total loans	7,799	8,452
Loans rated 9
Financing Receivable, Recorded Investment [Line Items]
Total loans	460	645
Loans rated 10
Financing Receivable, Recorded Investment [Line Items]
Total loans	0	0
Loans not rated
Financing Receivable, Recorded Investment [Line Items]
Total loans	991,184	949,794
Consumer, Excluding Consumer Other Portfolio Segment
Financing Receivable, Recorded Investment [Line Items]
Total loans	1,746,831	1,693,513
Consumer, Excluding Consumer Other Portfolio Segment | 1-4 Family Residential
Financing Receivable, Recorded Investment [Line Items]
Total loans	893,569	851,154
Consumer, Excluding Consumer Other Portfolio Segment | Home Equity
Financing Receivable, Recorded Investment [Line Items]
Total loans	79,975	78,719
Consumer, Excluding Consumer Other Portfolio Segment | Commercial Real Estate
Financing Receivable, Recorded Investment [Line Items]
Total loans	702,122	687,289
Consumer, Excluding Consumer Other Portfolio Segment | Loans rated 1 - 6 | 1-4 Family Residential
Financing Receivable, Recorded Investment [Line Items]
Total loans	1,046	1,054
Consumer, Excluding Consumer Other Portfolio Segment | Loans rated 1 - 6 | Home Equity
Financing Receivable, Recorded Investment [Line Items]
Total loans	288	293
Consumer, Excluding Consumer Other Portfolio Segment | Loans rated 1 - 6 | Commercial Real Estate
Financing Receivable, Recorded Investment [Line Items]
Total loans	693,062	671,872
Consumer, Excluding Consumer Other Portfolio Segment | Loans rated 7 | 1-4 Family Residential
Financing Receivable, Recorded Investment [Line Items]
Total loans	3,509	3,514
Consumer, Excluding Consumer Other Portfolio Segment | Loans rated 7 | Home Equity
Financing Receivable, Recorded Investment [Line Items]
Total loans	1,343	967
Consumer, Excluding Consumer Other Portfolio Segment | Loans rated 7 | Commercial Real Estate
Financing Receivable, Recorded Investment [Line Items]
Total loans	3,812	9,720
Consumer, Excluding Consumer Other Portfolio Segment | Loans rated 8 | 1-4 Family Residential
Financing Receivable, Recorded Investment [Line Items]
Total loans	2,419	2,442
Consumer, Excluding Consumer Other Portfolio Segment | Loans rated 8 | Home Equity
Financing Receivable, Recorded Investment [Line Items]
Total loans	112	258
Consumer, Excluding Consumer Other Portfolio Segment | Loans rated 8 | Commercial Real Estate
Financing Receivable, Recorded Investment [Line Items]
Total loans	5,248	5,697
Consumer, Excluding Consumer Other Portfolio Segment | Loans rated 9 | 1-4 Family Residential
Financing Receivable, Recorded Investment [Line Items]
Total loans	460	645
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	886,135	843,499
Consumer, Excluding Consumer Other Portfolio Segment | Loans not rated | Home Equity
Financing Receivable, Recorded Investment [Line Items]
Total loans	78,232	77,201
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	71,165	76,351
Consumer and Commercial Portfolio Segment | Loans rated 1 - 6 | Construction
Financing Receivable, Recorded Investment [Line Items]
Total loans	71,165	76,351
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	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 business
Financing Receivable, Recorded Investment [Line Items]
Total loans	210,738	206,234
Commercial business | Loans rated 1 - 6
Financing Receivable, Recorded Investment [Line Items]
Total loans	194,471	188,706
Commercial business | Loans rated 7
Financing Receivable, Recorded Investment [Line Items]
Total loans	16,259	17,510
Commercial business | Loans rated 8
Financing Receivable, Recorded Investment [Line Items]
Total loans	8	18
Commercial business | Loans rated 9
Financing Receivable, Recorded Investment [Line Items]
Total loans	0	0
Commercial business | Loans rated 10
Financing Receivable, Recorded Investment [Line Items]
Total loans	0	0
Commercial business | Loans not rated
Financing Receivable, Recorded Investment [Line Items]
Total loans	0	0
Consumer
Financing Receivable, Recorded Investment [Line Items]
Total loans	26,978	29,281
Consumer | Loans rated 1 - 6
Financing Receivable, Recorded Investment [Line Items]
Total loans	4	4
Consumer | Loans rated 7
Financing Receivable, Recorded Investment [Line Items]
Total loans	145	146
Consumer | Loans rated 8
Financing Receivable, Recorded Investment [Line Items]
Total loans	12	37
Consumer | Loans rated 9
Financing Receivable, Recorded Investment [Line Items]
Total loans	0	0
Consumer | Loans rated 10
Financing Receivable, Recorded Investment [Line Items]
Total loans	0	0
Consumer | Loans not rated
Financing Receivable, Recorded Investment [Line Items]
Total loans	$ 26,817	$ 29,094

Derivatives - Derivative Financ

Derivatives - Derivative Financial Instruments Not Designated as hedging Instruments (Details) - Not Designated as Hedging Instrument - USD ($) $ in Thousands	Mar. 31, 2017	Dec. 31, 2016
Derivatives, Fair Value [Line Items]
Derivative Gains, notional amount	$ 441,767	$ 435,173
Derivative Gains, fair value	8,602	9,024
Derivative Losses, notional amount	458,894	452,533
Derivative Losses, fair value	8,602	8,988
Commercial loan level interest rate swap agreements
Derivatives, Fair Value [Line Items]
Derivative Gains, notional amount	426,021	419,488
Derivative Gains, fair value	8,602	9,016
Derivative Losses, notional amount	426,021	419,488
Derivative Losses, fair value	8,602	8,932
Other contracts
Derivatives, Fair Value [Line Items]
Derivative Gains, notional amount	15,746	15,685
Derivative Gains, fair value	0	8
Derivative Losses, notional amount	32,873	33,045
Derivative Losses, fair value	$ 0	$ 56

Derivatives - Additional Inform

Derivatives - Additional Information (Details) - Not Designated as Hedging Instrument - USD ($) $ in Thousands	Mar. 31, 2017	Dec. 31, 2016
Derivative [Line Items]
Derivative Gains, fair value	$ 8,602	$ 9,024
Derivative Losses, fair value	8,602	8,988
Mortgage loan commitments
Derivative [Line Items]
Notional amount	22,100	6,800
Derivative Gains, fair value	275	111
Derivative Losses, fair value	37	3
Forward loan sale commitments
Derivative [Line Items]
Notional amount	23,800	9,500
Derivative Gains, fair value	37	15
Derivative Losses, fair value	$ 35	$ 74

Deposits - Summary of Deposit B

Deposits - Summary of Deposit Balances (Details) - USD ($) $ in Thousands	Mar. 31, 2017	Dec. 31, 2016
Banking and Thrift [Abstract]
NOW and demand	$ 342,118	$ 331,508
Regular savings	265,116	262,984
Money market	622,852	573,204
Brokered money market	50,129	53,357
Total non-certificate accounts	1,280,215	1,221,053
Term certificates of $250,000 or more	82,814	77,550
Term certificates less than $250,000	265,228	262,564
Brokered term certificates	228,465	247,520
Total term certificate accounts	576,507	587,634
Total deposits	$ 1,856,722	$ 1,808,687

Deposits - Schedule of Contract

Deposits - Schedule of Contractual Maturities (Details) - USD ($) $ in Thousands	Mar. 31, 2017	Dec. 31, 2016
Time Deposits, Fiscal Year Maturity [Abstract]
Amount - Within 1 year	$ 346,078
Amount - 1-2 years	95,556
Amount - 2-3 years	87,624
Amount - 3-4 years	25,626
Amount - 4 years and beyond	21,623
Total term certificate accounts	$ 576,507	$ 587,634
Weighted Average Rate of Time Deposits [Abstract]
Weighted Average Rate - Within 1 year	0.73%
Weighted Average Rate - 1-2 years	1.28%
Weighted Average Rate - 2-3 years	1.78%
Weighted Average Rate - 3-4 years	1.83%
Weighted Average Rate - 4 years and beyond	1.71%
Weighted Average Rate	1.07%

Fair Value Measurements - Asset

Fair Value Measurements - Assets and Liabilities Measured at Fair Value on a Recurring Basis (Details) - USD ($) $ in Thousands	Mar. 31, 2017	Dec. 31, 2016
Assets
Debt securities	$ 164,582	$ 161,668
Marketable equity securities	9,252	43,168
Recurring
Assets
Debt securities	164,582	161,668
Marketable equity securities	9,252	43,168
Total assets	182,748	213,986
Liabilities
Interest rate swap agreements	8,674	9,065
Recurring | Level 1
Assets
Debt securities	0	0
Marketable equity securities	9,252	43,168
Total assets	9,252	43,168
Liabilities
Interest rate swap agreements	0	0
Recurring | Level 2
Assets
Debt securities	164,582	161,668
Marketable equity securities	0	0
Total assets	173,184	170,692
Liabilities
Interest rate swap agreements	8,602	8,988
Recurring | Level 3
Assets
Debt securities	0	0
Marketable equity securities	0	0
Total assets	312	126
Liabilities
Interest rate swap agreements	72	77
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	8,602	9,024
Liabilities
Interest rate swap agreements	8,602	8,988
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	8,602	9,024
Liabilities
Interest rate swap agreements	8,602	8,988
Interest rate swap agreements | Recurring | Level 1
Assets
Interest rate swap agreements	0	0
Liabilities
Interest rate swap agreements	0	0
Interest rate swap agreements | Recurring | Level 2
Assets
Interest rate swap agreements	8,602	9,024
Liabilities
Interest rate swap agreements	8,602	8,988
Interest rate swap agreements | Recurring | Level 3
Assets
Interest rate swap agreements	0	0
Liabilities
Interest rate swap agreements	0	0
Forward loan sale commitments | Level 1
Assets
Interest rate swap agreements	0	0
Liabilities
Interest rate swap agreements	0	0
Forward loan sale commitments | Level 2
Assets
Interest rate swap agreements	0	0
Liabilities
Interest rate swap agreements	0	0
Forward loan sale commitments | Level 3
Assets
Interest rate swap agreements	37	15
Liabilities
Interest rate swap agreements	35	74
Forward loan sale commitments | Recurring
Assets
Interest rate swap agreements	37	15
Liabilities
Interest rate swap agreements	35	74
Forward loan sale commitments | Recurring | Level 1
Assets
Interest rate swap agreements	0	0
Liabilities
Interest rate swap agreements	0	0
Forward loan sale commitments | Recurring | Level 2
Assets
Interest rate swap agreements	0	0
Liabilities
Interest rate swap agreements	0	0
Forward loan sale commitments | Recurring | Level 3
Assets
Interest rate swap agreements	37	15
Liabilities
Interest rate swap agreements	35	74
Mortgage loan commitments | Level 1
Assets
Interest rate swap agreements	0	0
Liabilities
Interest rate swap agreements	0	0
Mortgage loan commitments | Level 2
Assets
Interest rate swap agreements	0	0
Liabilities
Interest rate swap agreements	0	0
Mortgage loan commitments | Level 3
Assets
Interest rate swap agreements	275	111
Liabilities
Interest rate swap agreements	37	3
Mortgage loan commitments | Recurring
Assets
Interest rate swap agreements	275	111
Liabilities
Interest rate swap agreements	37	3
Mortgage loan commitments | Recurring | Level 1
Assets
Interest rate swap agreements	0	0
Liabilities
Interest rate swap agreements	0	0
Mortgage loan commitments | Recurring | Level 2
Assets
Interest rate swap agreements	0	0
Liabilities
Interest rate swap agreements	0	0
Mortgage loan commitments | Recurring | Level 3
Assets
Interest rate swap agreements	275	111
Liabilities
Interest rate swap agreements	$ 37	$ 3

Fair Value Measurements - Ass53

Fair Value Measurements - Assets and Liabilities Measured at Fair Value on a Nonrecurring Basis (Details) - Nonrecurring - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016	Dec. 31, 2016
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Impaired loans	$ 77	$ 221
Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Impaired loans	0		$ 0
Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Impaired loans	0		0
Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Impaired loans	$ 151		$ 136

Fair Value Measurements - Summa

Fair Value Measurements - Summary of Fair Value, Balance Sheet Grouping (Details) - USD ($) $ in Thousands	Mar. 31, 2017	Dec. 31, 2016
Financial assets:
Securities available for sale	$ 173,834	$ 204,836
Securities held to maturity	201,684	201,027
Estimate of Fair Value Measurement
Financial assets:
Cash and cash equivalents	35,149	30,496
Securities available for sale	173,834	204,836
Securities held to maturity	198,976	198,093
Federal Home Loan Bank stock	14,828	13,352
Loans and loans held for sale	1,960,134	1,903,978
Accrued interest receivable	5,994	6,057
Financial liabilities:
Deposits	1,856,153	1,808,629
Borrowings	222,512	250,648
Carrying Amount
Financial assets:
Cash and cash equivalents	35,149	30,496
Securities available for sale	173,834	204,836
Securities held to maturity	201,684	201,027
Federal Home Loan Bank stock	14,828	13,352
Loans and loans held for sale	1,970,149	1,915,632
Accrued interest receivable	5,994	6,057
Financial liabilities:
Deposits	1,856,722	1,808,687
Borrowings	223,000	251,000
Level 1
Financial assets:
Cash and cash equivalents	35,149	30,496
Securities available for sale	9,252	43,168
Securities held to maturity	0	0
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	164,582	161,668
Securities held to maturity	198,976	198,093
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	222,512	250,648
Level 3
Financial assets:
Cash and cash equivalents	0	0
Securities available for sale	0	0
Securities held to maturity	0	0
Federal Home Loan Bank stock	14,828	13,352
Loans and loans held for sale	1,960,134	1,903,978
Accrued interest receivable	5,994	6,057
Financial liabilities:
Deposits	1,856,153	1,808,629
Borrowings	0	0
Interest rate swap agreements | Estimate of Fair Value Measurement
Financial liabilities:
Derivative assets:	8,602	9,024
Derivative liabilities:	8,602	8,988
Interest rate swap agreements | Carrying Amount
Financial liabilities:
Derivative assets:	8,602	9,024
Derivative liabilities:	8,602	8,988
Interest rate swap agreements | Level 1
Financial liabilities:
Derivative assets:	0	0
Derivative liabilities:	0	0
Interest rate swap agreements | Level 2
Financial liabilities:
Derivative assets:	8,602	9,024
Derivative liabilities:	8,602	8,988
Interest rate swap agreements | 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:	37	15
Derivative liabilities:	35	74
Forward loan sale commitments | Carrying Amount
Financial liabilities:
Derivative assets:	37	15
Derivative liabilities:	35	74
Forward loan sale commitments | Level 1
Financial liabilities:
Derivative assets:	0	0
Derivative liabilities:	0	0
Forward loan sale commitments | Level 2
Financial liabilities:
Derivative assets:	0	0
Derivative liabilities:	0	0
Forward loan sale commitments | Level 3
Financial liabilities:
Derivative assets:	37	15
Derivative liabilities:	35	74
Mortgage loan commitments | Estimate of Fair Value Measurement
Financial liabilities:
Derivative assets:	275	111
Derivative liabilities:	37	3
Mortgage loan commitments | Carrying Amount
Financial liabilities:
Derivative assets:	275	111
Derivative liabilities:	37	3
Mortgage loan commitments | Level 1
Financial liabilities:
Derivative assets:	0	0
Derivative liabilities:	0	0
Mortgage loan commitments | Level 2
Financial liabilities:
Derivative assets:	0	0
Derivative liabilities:	0	0
Mortgage loan commitments | Level 3
Financial liabilities:
Derivative assets:	275	111
Derivative liabilities:	$ 37	$ 3

Comprehensive Income - Componen

Comprehensive Income - Components of Accumulated Other Comprehensive Loss (Details) - USD ($) $ in Thousands	Mar. 31, 2017	Dec. 31, 2016
Accumulated Other Comprehensive Income (Loss) [Line Items]
Accumulated other comprehensive income	$ (2,145)	$ (4,069)
Accumulated Defined Benefit Plans Adjustment, Net Unamortized Gain (Loss)
Accumulated Other Comprehensive Income (Loss) [Line Items]
Net unrealized actuarial loss	(3,393)	(3,482)
Tax effect	1,211	1,270
Accumulated other comprehensive income	(2,182)	(2,212)
Securities Available for Sale | Accumulated Net Investment Gain (Loss)
Accumulated Other Comprehensive Income (Loss) [Line Items]
Net unrealized actuarial loss	(262)	(3,087)
Tax effect	103	1,007
Accumulated other comprehensive income	(159)	(2,080)
Securities Held to Maturity | Accumulated Net Investment Gain (Loss)
Accumulated Other Comprehensive Income (Loss) [Line Items]
Net unrealized actuarial loss	314	337
Tax effect	(118)	(114)
Accumulated other comprehensive income	$ 196	$ 223

Comprehensive Income - Changes

Comprehensive Income - Changes in Accumulated Other Comprehensive Income (Loss) by Component (Details) - USD ($) $ in Thousands		3 Months Ended
		Mar. 31, 2017	Mar. 31, 2016
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning balance		$ 386,907	$ 398,829
Amortization of amounts previously recorded upon transfer from available for sale	[1]	(23)	(70)
Other comprehensive income		1,924	2,409
Ending balance		396,944	393,556
Accumulated other comprehensive loss
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning balance		(4,069)	(5,188)
Other comprehensive income before reclassification adjustments		1,803	3,415
Net realized losses		1,022	289
Amortization of actuarial losses		89	68
Amortization of amounts previously recorded upon transfer from available for sale		(23)	(70)
Tax effects		(967)	(1,293)
Other comprehensive income		1,924	2,409
Ending balance		(2,145)	(2,779)
Defined Benefit Pension Plan
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning balance		(2,212)	(1,806)
Other comprehensive income before reclassification adjustments		0	0
Net realized losses		0	0
Amortization of actuarial losses		89	68
Amortization of amounts previously recorded upon transfer from available for sale		0	0
Tax effects		(59)	(24)
Other comprehensive income		30	44
Ending balance		(2,182)	(1,762)
Securities Available for Sale | Accumulated Net Investment Gain (Loss)
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning balance		(2,080)	(3,756)
Other comprehensive income before reclassification adjustments		1,803	3,415
Net realized losses		1,022	289
Amortization of amounts previously recorded upon transfer from available for sale		0	0
Tax effects		(904)	(1,294)
Other comprehensive income		1,921	2,410
Ending balance		(159)	(1,346)
Securities Held to Maturity | Accumulated Net Investment Gain (Loss)
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning balance		223	374
Other comprehensive income before reclassification adjustments		0	0
Net realized losses		0	0
Amortization of amounts previously recorded upon transfer from available for sale		(23)	(70)
Tax effects		(4)	25
Other comprehensive income		(27)	(45)
Ending balance		$ 196	$ 329
[1]	Amounts are included in interest income on securities in the consolidated statements of net income.

Stockholders' Equity - Addition

Stockholders' Equity - Additional Information (Details)	Mar. 31, 2017	Jan. 01, 2017	Dec. 31, 2016	Jan. 01, 2015
Equity [Abstract]
Tier one risk based capital required for capital adequacy to risk weighted assets	6.00%		6.00%
Tier one leverage capital required for capital adequacy to average assets	4.00%		4.00%
Tier one capital conservation buffer common equity capital to risk weighted assets (greater than)		1.25%	0.625%	2.50%

Stockholders' Equity - Minimum

Stockholders' Equity - Minimum Required Capital (Details) - USD ($) $ in Thousands	Mar. 31, 2017	Dec. 31, 2016
Capital [Abstract]
Actual - Total Capital to Risk Weighted Assets	$ 405,534	$ 395,325
Actual - Total Capital to Risk Weighted Assets Ratio (percentage)	20.40%	20.50%
Minimum Capital Requirement - Total Capital	$ 158,655	$ 154,471
Minimum Capital Requirement - Total Capital to Risk Weighted Assets Ratio (percentage)	8.00%	8.00%
Minimum to Be Well Capitalized - Total Capital	$ 198,318	$ 193,089
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	$ 386,659	$ 376,575
Actual - Tier 1 Capital to Risk Weighted Assets Ratio (percentage)	19.50%	19.50%
Minimum Capital Requirement - Tier 1 Capital to Risk Weighted Assets	$ 118,991	$ 115,854
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	$ 158,655	$ 154,471
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	$ 386,659	$ 376,575
Actual - Common Equity to Risk Weighted Assets Ratio (percentage)	19.50%	19.50%
Minimum Capital Requirement - Common Equity to Risk Weighted Assets	$ 89,243	$ 86,890
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	$ 128,907	$ 125,508
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	$ 386,659	$ 376,575
Actual - Tier 1 Capital to Average Assets Ratio (percentage)	15.60%	16.00%
Minimum Capital Requirement - Tier 1 Capital to Average Assets	$ 98,895	$ 94,166
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	$ 123,619	$ 117,708
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	$ 325,098	$ 313,457
Actual - Total Capital to Risk Weighted Assets Ratio (percentage)	16.40%	16.30%
Minimum Capital Requirement - Total Capital	$ 158,418	$ 154,196
Minimum Capital Requirement - Total Capital to Risk Weighted Assets Ratio (percentage)	8.00%	8.00%
Minimum to Be Well Capitalized - Total Capital	$ 198,023	$ 192,745
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	$ 306,223	$ 294,707
Actual - Tier 1 Capital to Risk Weighted Assets Ratio (percentage)	15.50%	15.30%
Minimum Capital Requirement - Tier 1 Capital to Risk Weighted Assets	$ 118,814	$ 115,647
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	$ 158,418	$ 154,196
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	$ 306,223	$ 294,707
Actual - Common Equity to Risk Weighted Assets Ratio (percentage)	15.50%	15.30%
Minimum Capital Requirement - Common Equity to Risk Weighted Assets	$ 89,110	$ 86,735
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	$ 128,715	$ 125,284
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	$ 306,223	$ 294,707
Actual - Tier 1 Capital to Average Assets Ratio (percentage)	12.40%	12.50%
Minimum Capital Requirement - Tier 1 Capital to Average Assets	$ 98,897	$ 94,099
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	$ 123,622	$ 117,623
Minimum to Be Well Capitalized - Tier 1 Capital to Average Assets Ratio (percentage)	5.00%	5.00%

Employee Stock Ownership Plan -

Employee Stock Ownership Plan - Employee Stock Ownership Plan (Details) - shares	Mar. 31, 2017	Dec. 31, 2016
Compensation and Retirement Disclosure [Abstract]
Allocated	225,247	149,613
Committed to be allocated	18,718	75,912
Unallocated	2,030,890	2,049,608
Total	2,274,855	2,275,133

Employee Stock Ownership Plan60

Employee Stock Ownership Plan - Additional information (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016	Dec. 31, 2016
Compensation and Retirement Disclosure [Abstract]
ESOP, Number of shares committed to be released annually (shares)	75,912
Fair Value of unallocated shares	$ 36,300		$ 38,400
ESOP expense	$ 341	$ 265

Earnings Per Common Share (Deta

Earnings Per Common Share (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Net income applicable to common stock	$ 7,487	$ 1,667
Average number of common shares outstanding	26,842,047	28,176,619
Less: Average unallocated ESOP shares	(2,040,249)	(2,115,383)
Less: Average unvested restricted stock awards	(890,379)	(995,150)
Average number of common shares outstanding used to calculate basic earnings per common share	23,911,419	25,066,086
Average number of common shares outstanding used to calculate diluted earnings per common share	24,275,665	25,132,441
Earnings per common share:
Basic (dollars per share)	$ 0.31	$ 0.07
Diluted (dollars per share)	$ 0.31	$ 0.07
Antidilutive securities excluded from computation of earnings per share (shares)	362,100	2,479,000
Stock Options
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Effect of dilutive share-based compensation awards (in shares)	139,392	0
Unvested Restricted Stock
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Effect of dilutive share-based compensation awards (in shares)	224,854	66,355

Share-Based Compensation - Addi

Share-Based Compensation - Additional Information (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
Stock Options
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of shares authorized	2,846,681
Term (years)	10 years
Expected life (years)	6 years 6 months
Vesting period (years)	5 years
Share-based compensation expense	$ 610	$ 511
Tax benefit related to share-based compensation expense	$ 156	125
Restricted Stock
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of shares authorized	1,138,673
Share-based compensation expense	$ 798	684
Tax benefit related to share-based compensation expense	$ 305	$ 243
Granted (shares)	175,695
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]
Term (years)	10 years

Share-Based Compensation - Fair

Share-Based Compensation - Fair Value Assumptions (Details)	3 Months Ended
	Mar. 31, 2017$ / sharesshares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Options granted (shares) | shares	362,100
Stock Options
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Options granted (shares) | shares	362,100
Vesting period (years)	5 years
Term (years)	10 years
Expected life (years)	6 years 6 months
Minimum | Stock Options
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Expected volatility (percent)	27.22%
Expected dividend yield (percent)	0.71%
Risk free interest rate (percent)	2.04%
Fair value per option (dollars per share) | $ / shares	$ 5.05
Maximum | Stock Options
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Term (years)	10 years
Expected volatility (percent)	27.43%
Expected dividend yield (percent)	1.11%
Risk free interest rate (percent)	2.16%
Fair value per option (dollars per share) | $ / shares	$ 5.31

Share-Based Compensation - Stoc

Share-Based Compensation - Stock Option Activity (Details)	3 Months Ended
	Mar. 31, 2017USD ($)$ / sharesshares
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding [Roll Forward]
Beginning balance (shares)	2,449,670
Granted (shares)	362,100
Forfeited (shares)	(150,500)
Exercised (shares)	(13,000)
Ending balance (shares)	2,648,270
Exercisable at end of period (shares)	493,890
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) | $ / shares	$ 14.06
Granted, weighted average exercise price (dollars per share) | $ / shares	18.24
Forfeited, weighted average exercise price (dollars per share) | $ / shares	14.07
Exercised, weighted average exercise price (dollars per share) | $ / shares	13.84
Ending balance, weighted average exercise price (dollars per share) | $ / shares	14.64
Exercisable at end of period, weighted average exercise price (dollars per share) | $ / shares	$ 14.07
Share-based Compensation Arrangement by Share-based Payment Award, Options, Additional Disclosures [Abstract]
Outstanding, weighted average remaining contractual term (years)	8 years 8 months 16 days
Outstanding, aggregate intrinsic value | $	$ 8,653,603
Exercisable, aggregate intrinsic value | $	$ 1,866,904
Exercisable at period end, weighted average remaining contractual term (years)	8 years 6 months 11 days
Stock Options
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding [Roll Forward]
Granted (shares)	362,100
Share-based Compensation Arrangement by Share-based Payment Award, Options, Additional Disclosures [Abstract]
Unrecognized compensation cost | $	$ 8,502,000
Weighted average remaining recognition period (years)	3 years 9 months 22 days

Share-Based Compensation - Rest

Share-Based Compensation - Restricted Stock Activity (Details) - Restricted Stock $ / shares in Units, $ in Thousands	3 Months Ended
	Mar. 31, 2017USD ($)$ / 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	816,070
Granted (shares) | shares	175,695
Vested (shares) | shares	(21,873)
Forfeited (shares) | shares	(84,417)
Ending balance (shares) | shares	885,475
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	$ 14.06
Granted, weighted average exercise price (dollars per share) | $ / shares	18.25
Vested, weighted average exercise price (dollars per share) | $ / shares	13.98
Forfeited, weighted average exercise price (dollars per share) | $ / shares	14.07
Ending balance, weighted average exercise price (dollars per share) | $ / shares	$ 14.89
Unrecognized compensation cost inclusive of directors' fees | $	$ 11,907
Weighted average remaining recognition period (years)	3 years 10 months 24 days

Subsequent Events - Narrative (

Subsequent Events - Narrative (Details) - USD ($) $ in Thousands	May 01, 2017	Mar. 31, 2017	Mar. 31, 2016	Dec. 31, 2016
Subsequent Event [Line Items]
Debt securities		$ 164,582		$ 161,668
Gross unrealized gains		1,500		1,323
Gross unrealized losses		(1,577)		$ (1,966)
Net unrealized gains (losses)		(77)
Investment in held-to-maturity securities		$ 8,086	$ 9,238
Subsequent Event
Subsequent Event [Line Items]
Debt securities	$ 165,300
Gross unrealized gains	1,800
Gross unrealized losses	(1,200)
Net unrealized gains (losses)	600
Scenario, Forecast
Subsequent Event [Line Items]
Investment in held-to-maturity securities	$ 100,000