Enterprise Bancorp (EBTC) 10-Q 7 Aug 17 2017 Q2 Quarterly report Financial data

Document and Entity Information

Document and Entity Information - shares	6 Months Ended
	Jun. 30, 2017	Aug. 02, 2017
Document and Entity Information [Abstract]
Entity Registrant Name	ENTERPRISE BANCORP INC /MA/
Entity Central Index Key	1,018,399
Current Fiscal Year End Date	--12-31
Entity Filer Category	Accelerated Filer
Document Type	10-Q
Document Period End Date	Jun. 30, 2017
Document Fiscal Year Focus	2,017
Document Fiscal Period Focus	Q2
Amendment Flag	false
Entity Common Stock, Shares Outstanding		11,585,031

Consolidated Balance Sheets

Consolidated Balance Sheets - USD ($) $ in Thousands	Jun. 30, 2017	Dec. 31, 2016
Cash and cash equivalents:
Cash and due from banks	$ 51,714	$ 33,047
Interest-earning deposits	24,049	17,428
Total cash and cash equivalents	75,763	50,475
Investment securities at fair value	388,005	374,790
Federal Home Loan Bank stock	4,364	2,094
Loans held for sale	856	1,569
Loans, less allowance for loan losses of $31,958 at June 30, 2017, and $31,342 at December 31, 2016	2,082,442	1,991,387
Premises and equipment, net	35,162	33,540
Accrued interest receivable	9,157	8,792
Deferred income taxes, net	14,924	17,020
Bank-owned life insurance	29,118	28,765
Prepaid income taxes	1,784	1,344
Prepaid expenses and other assets	9,316	10,837
Goodwill	5,656	5,656
Total assets	2,656,547	2,526,269
Liabilities
Deposits	2,353,782	2,268,921
Borrowed Funds	44,255	10,671
Subordinated debt	14,841	14,834
Accrued expenses and other liabilities	15,794	16,794
Accrued interest payable	218	263
Total liabilities	2,428,890	2,311,483
Commitments and Contingencies
Stockholders' Equity
Preferred stock, $0.01 par value per share; 1,000,000 shares authorized; no shares issued	0	0
Common stock $0.01 par value per share; 40,000,000 shares authorized; 11,582,344 shares issued and outstanding at June 30, 2017, and 11,475,742 shares issued and outstanding at December 31, 2016	116	115
Additional paid-in-capital	86,628	85,421
Retained earnings	138,049	130,008
Accumulated other comprehensive income (loss)	2,864	(758)
Total stockholders' equity	227,657	214,786
Total liabilities and stockholders' equity	$ 2,656,547	$ 2,526,269

Consolidated Balance Sheets (Pa

Consolidated Balance Sheets (Parenthetical) - USD ($) $ in Thousands	Jun. 30, 2017	Dec. 31, 2016
Statement of Financial Position [Abstract]
Allowance for loan losses	$ 31,958	$ 31,342
Common stock, par value	$ 0.01	$ 0.01
Common stock, shares authorized	40,000,000
Common stock, shares issued	11,582,344	11,475,742
Common stock, shares outstanding	11,582,344	11,475,742
Preferred stock, par value	$ 0.01	$ 0.01
Preferred stock, shares authorized	1,000,000	1,000,000
Preferred stock, shares issued	0	0

Consolidated Statements of Inco

Consolidated Statements of Income - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016
Interest and dividend income:
Loans and loans held for sale	$ 23,281	$ 21,032	$ 45,652	$ 41,913
Investment securities	1,964	1,551	3,884	3,091
Other interest-earning assets	93	49	166	93
Total interest and dividend income	25,338	22,632	49,702	45,097
Interest expense:
Deposits	1,380	1,099	2,608	2,187
Borrowed funds	192	14	253	77
Subordinated debt	231	230	459	461
Total interest expense	1,803	1,343	3,320	2,725
Net interest income	23,535	21,289	46,382	42,372
Provision for loan losses	280	267	405	1,117
Net interest income after provision for loan losses	23,255	21,022	45,977	41,255
Non-interest income:
Investment advisory fees	1,267	1,327	2,492	2,431
Deposit and interchange fees	1,522	1,276	2,862	2,518
Income on bank-owned life insurance,net	177	191	353	382
Net gains on sales of investment securities	229	63	769	65
Gains on sales of loans	138	105	271	194
Other income	606	620	1,326	1,198
Total non-interest income	3,939	3,582	8,073	6,788
Non-interest expense:
Salaries and employee benefits	11,792	11,025	24,484	21,510
Occupancy and equipment expenses	1,945	1,781	3,884	3,594
Technology and telecommunications expenses	1,606	1,548	3,188	2,971
Advertising and public relations expenses	797	817	1,416	1,496
Audit, legal and other professional fees	314	375	677	832
Deposit insurance premiums	376	324	759	650
Supplies and postage expenses	245	258	478	487
Other operating expenses	1,679	1,414	3,288	2,871
Total non-interest expense	18,754	17,542	38,174	34,411
Income before income taxes	8,440	7,062	15,876	13,632
Provision for income taxes	2,845	2,291	4,709	4,548
Net income	$ 5,595	$ 4,771	$ 11,167	$ 9,084
Basic earnings per share	$ 0.48	$ 0.45	$ 0.97	$ 0.87
Diluted earnings per share	$ 0.48	$ 0.45	$ 0.96	$ 0.86
Basic weighted average common shares outstanding	11,572,430	10,561,680	11,540,796	10,483,396
Diluted weighted average common shares outstanding	11,652,689	10,629,900	11,625,712	10,550,842

Consolidated Statements of Comp

Consolidated Statements of Comprehensive Income - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016
Statement of Comprehensive Income [Abstract]
Net income	$ 5,595	$ 4,771	$ 11,167	$ 9,084
Other comprehensive income, net of taxes:
Gross unrealized holding gains on investments arising during the period	4,911	4,054	6,431	7,080
Income tax expense	(1,772)	(1,479)	(2,316)	(2,629)
Net unrealized holding gains, net of tax	3,139	2,575	4,115	4,451
Less: Reclassification adjustment for net gains included in net income
Net realized gains on sales of securities during the period	229	63	769	65
Income tax expense	(83)	(23)	(276)	(24)
Reclassification adjustment for gains realized, net of tax	146	40	493	41
Total other comprehensive income, net	2,993	2,535	3,622	4,410
Comprehensive income	$ 8,588	$ 7,306	$ 14,789	$ 13,494

Consolidated Statement of Chang

Consolidated Statement of Changes in Stockholders' Equity - 6 months ended Jun. 30, 2017 - USD ($) $ in Thousands	Total	Common Stock	Additional Paid-in Capital	Retained Earnings	Accumulated Other Comprehensive (Loss)/Income
Balance, beginning at Dec. 31, 2016	$ 214,786	$ 115	$ 85,421	$ 130,008	$ (758)
Increase (Decrease) in Stockholders' Equity
Net income	11,167			11,167
Cumulative effect adjustment for adoption of new accounting pronouncement	0		13	(13)
Other comprehensive income, net	3,622				3,622
Common stock dividend paid ($0.27 per share)	(3,113)			(3,113)
Common stock issued under dividend reinvestment plan	748	0	748
Common stock issued other	37	0	37
Stock-based compensation, net	960	1	959
Repurchases for tax withholdings on options and restricted stock awards, net of proceeds from exercise of stock options	(550)	0	(550)
Balance, ending at Jun. 30, 2017	$ 227,657	$ 116	$ 86,628	$ 138,049	$ 2,864

Consolidated Statement of Chan7

Consolidated Statement of Changes in Stockholders' Equity (Parenthetical)	6 Months Ended
	Jun. 30, 2017$ / shares
Statement of Stockholders' Equity [Abstract]
Common stock dividend paid, per share	$ 0.27

Consolidated Statements of Cash

Consolidated Statements of Cash Flows - USD ($) $ in Thousands	3 Months Ended		6 Months Ended		12 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016	Dec. 31, 2016
Cash flows from operating activities
Net income	$ 5,595	$ 4,771	$ 11,167	$ 9,084
Adjustments to reconcile net income to net cash provided by operating activities:
Provision for loan losses	280	267	405	1,117
Depreciation and amortization			3,468	2,873
Stock-based compensation expense	496	462	820	905
Mortgage loans originated for sale			(11,610)	(10,682)
Proceeds from mortgage loans sold			12,594	10,614
Net gains on sales of loans			(271)	(194)
Net gains on sales of investments	(229)	(63)	(769)	(65)
Income on bank-owned life insurance,net	(177)	(191)	(353)	(382)
Changes in:
Decrease in other assets			425	218
Decrease in other liabilities			(747)	(1,371)
Net cash provided by operating activities			15,129	12,117
Cash flows from investing activities:
Proceeds from sales of investment securities			10,438	1,829
Net (purchases) proceeds from FHLB capital stock			(2,270)	1,171
Proceeds from maturities, calls and pay-downs of investment securities			12,986	9,824
Purchase of investment securities			(31,153)	(20,957)
Net increase in loans			(91,460)	(39,004)
Additions to premises and equipment, net			(3,949)	(5,964)
Proceeds from bank-owned life insurance			0	405
Net cash used in investing activities			(105,408)	(52,696)
Cash flows from financing activities:
Net increase in deposits			84,861	166,282
Net increase (decrease) in borrowed funds			33,584	(53,000)
Cash dividends paid			(3,113)	(2,712)
Proceeds from issuance of common stock			785	20,445
Repurchases for tax withholdings on options and restricted stock awards, net of proceeds from exercise of stock options			(550)	(69)
Net cash provided by financing activities			115,567	130,946
Net increase in cash and cash equivalents			25,288	90,367
Cash and cash equivalents at beginning of period			50,475	51,495	$ 51,495
Cash and cash equivalents at end of period	$ 75,763	$ 141,862	75,763	141,862	$ 50,475
Supplemental financial data:
Cash Paid For: Interest			3,320	2,749
Cash Paid For: Income Taxes			5,055	5,241
Supplemental schedule of non-cash investing activity:
Net purchases of investment securities not yet settled			0	5,793
Capital expenditures incurred not yet paid			$ 0	$ 257

Summary of Significant Accounti

Summary of Significant Accounting Policies	6 Months Ended
	Jun. 30, 2017
Accounting Policies [Abstract]
Summary of Significant Accounting Policies	Summary of Significant Accounting Policies (a) Organization of Holding Company and Basis of Presentation The accompanying unaudited consolidated interim financial statements and these notes should be read in conjunction with the December 31, 2016 audited consolidated financial statements and notes thereto contained in the 2016 Annual Report on Form 10-K of Enterprise Bancorp, Inc. (the "Company," "Enterprise," "we," or "our"), a Massachusetts corporation, as filed with the Securities and Exchange Commission (the "SEC") on March 14, 2017 (the " 2016 Annual Report on Form 10-K"). The Company has not changed its accounting policies from those disclosed in its 2016 Annual Report on Form 10-K. The Company's unaudited consolidated interim financial statements include the accounts of the Company and its wholly owned subsidiary, Enterprise Bank and Trust Company (the "Bank"). The Bank is a Massachusetts trust company organized in 1989. Substantially all of the Company's operations are conducted through the Bank and its subsidiaries. The Bank's subsidiaries include Enterprise Insurance Services, LLC and Enterprise Investment Services, LLC, organized under the laws of the State of Delaware for the purposes of engaging in insurance sales activities and offering non-deposit investment products and services, respectively. In addition, the Bank has the following subsidiaries that are incorporated in the Commonwealth of Massachusetts and classified as security corporations in accordance with applicable Massachusetts General Laws: Enterprise Security Corporation; Enterprise Security Corporation II; and Enterprise Security Corporation III. The security corporations, which hold various types of qualifying securities, are limited to conducting securities investment activities that the Bank itself would be allowed to conduct under applicable laws. At June 30, 2017 , the Company had 23 full service branches serving the Greater Merrimack Valley and North Central regions of Massachusetts and Southern New Hampshire (Southern Hillsborough and Rockingham counties). In July 2017, the Company opened its 24 th branch, located in Windham, New Hampshire. Through the Bank and its subsidiaries, the Company offers a range of commercial, residential and consumer loan products, deposit products and cash management services, as well as investment advisory and wealth management, trust and insurance services. The services offered through the Bank and its subsidiaries are managed as one strategic unit and represent the Company's only reportable operating segment. The Federal Deposit Insurance Corporation (the "FDIC") and the Massachusetts Division of Banks (the "Division") have regulatory authority over the Bank. The Bank is also subject to certain regulatory requirements of the Board of Governors of the Federal Reserve System (the "Federal Reserve Board") and, with respect to its New Hampshire branch operations, the New Hampshire Banking Department. The business and operations of the Company are subject to the regulatory oversight of the Federal Reserve Board. The Division also retains supervisory jurisdiction over the Company. The accompanying unaudited consolidated interim financial statements have been prepared in accordance with U.S. generally accepted accounting principles ("GAAP") for interim financial information and the instructions for Form 10-Q through the rules and interpretive releases of the SEC under federal securities law. In the opinion of management, the accompanying unaudited consolidated interim financial statements reflect all necessary adjustments consisting of normal recurring accruals for a fair presentation. All significant intercompany balances and transactions have been eliminated in the accompanying unaudited consolidated interim financial statements. Certain previous years' amounts in the consolidated financial statements, and notes thereto, have been reclassified to conform to the current year's presentation. Interim results are not necessarily indicative of results to be expected for the entire year, or any future period. The Company has evaluated subsequent events and transactions from June 30, 2017 through the date of this Quarterly report on Form 10-Q was filed with the SEC for potential recognition or disclosure as required by GAAP and determined that there were no material subsequent events requiring recognition or disclosure. (b) Critical Accounting Estimates In preparing the unaudited consolidated interim financial statements in conformity with GAAP, management is required to exercise judgment in determining many of the methodologies, assumptions and estimates to be utilized. These assumptions and estimates affect the reported values of assets and liabilities as of the balance sheet date and income and expenses for the period then ended. As future events and their effects cannot be determined with precision, actual results could differ significantly from these estimates should the assumptions and estimates used change over time due to changes in circumstances. Changes in those estimates resulting from continuing change in the economic environment and other factors will be reflected in the financial statements and results of operations in future periods. As discussed in the Company's 2016 Annual Report on Form 10-K, the three most significant areas in which management applies critical assumptions and estimates are the estimates of the allowance for loan losses, impairment review of investment securities and the impairment review of goodwill. Refer to Note 1, "Summary of Significant Accounting Policies," to the Company's consolidated financial statements included in the Company's 2016 Annual Report on Form 10-K for accounting policies related to these significant estimates. The Company has not changed its significant accounting policies from those disclosed in its 2016 Annual Report on Form 10-K. (c) Restricted Instruments Certain of the Company's derivative agreements contain provisions that require the Company to post collateral if the derivative exposure exceeds a threshold amount. When the Company has pledged cash as collateral for this purpose, the cash is carried as restricted cash within cash and cash equivalents. As a member of the Federal Home Loan Bank of Boston ("FHLB"), the Company is required to purchase certain levels of FHLB capital stock at par value in association with outstanding advances from the FHLB. From time-to-time, the FHLB may initiate the repurchase, at par value, of "excess" levels of its capital stock held by member banks. This stock is classified as a restricted investment and carried at cost, which management believes approximates fair value. FHLB stock represents the only restricted investment held by the Company. Management regularly reviews its holdings of FHLB stock for other-than-temporary-impairment ("OTTI"). Based on management's periodic review, the Company has not recorded any OTTI charges on this investment to date. If it was determined that a write-down of FHLB stock was required, impairment would be recognized through a charge to earnings. See Note 2, "Investment Securities," for additional information on management's OTTI review. (d) Income Taxes The Company uses the asset and liability method of accounting for income taxes. Under this method, deferred tax assets and liabilities are recognized for the future tax expense or benefit attributable to differences between the financial statement carrying amounts and the tax basis of assets and liabilities. The deferred tax assets and liabilities are reflected at currently enacted income tax rates applicable to the period in which the deferred tax assets or liabilities are expected to be realized or settled. As changes in tax laws or rates are enacted, deferred tax assets and liabilities will be adjusted accordingly through the provision for income taxes. The Company's policy is to classify interest resulting from underpayment of income taxes as income tax expense in the first period the interest would begin accruing according to the provisions of the relevant tax law. The Company classifies penalties resulting from underpayment of income taxes as income tax expense in the period for which the Company claims or expects to claim an uncertain tax position or in the period in which the Company's judgment changes regarding an uncertain tax position. The income tax provisions will differ from the expense that would result from applying the federal statutory rate to income before taxes, due primarily to the impact of tax-exempt interest from certain investment securities, loans and bank-owned life insurance. The Company did not have any unrecognized tax benefits accrued as income tax liabilities or receivables or as deferred tax items at June 30, 2017 . The Company is subject to U.S. federal and state income tax examinations by taxing authorities for the 2013 through 2016 tax years. (e) Recent Accounting Pronouncements Accounting pronouncements adopted by the Company In March 2016, the Financial Accounting Standards Board (the "FASB") issued Accounting Standards Update ("ASU" or "Update") No. 2016-09, "Compensation - Stock Compensation (Topic 718): Improvement to Employee Share-Based Payment Accounting." The new standard was effective for fiscal years beginning after December 15, 2016, including interim periods within those fiscal years. The Company adopted ASU No. 2016-09 in the first quarter of 2017. Several aspects of the accounting are simplified including, generally: a) income tax consequences; b) classification of awards as either equity or liabilities; c) accounting for forfeitures; and d) classification on the statement of cash flows. Upon adoption, the most significant impact of this amendment resulted from the prospective application of current excess tax benefits and deficiencies being recognized in income tax expense, which would previously have been recognized in additional paid-in capital, in the reporting period in which they occur. For the six months ended June 30, 2017 , this reduced the Company's provision for income taxes, increasing earnings by approximately $788 thousand . For the year ended December 31, 2016, the Company recognized $789 thousand in additional paid-in-capital in this regard, which, if under the new ASU, would have been recognized as income tax benefit in the income statement. This amount, treated as discrete items in the period in which they occur, will vary from year to year as a function of the volume of share-based payments vested or exercised and the then current market price of the Company's stock in comparison to the compensation cost recognized in the financial statements. Additionally upon adoption, the Company made a policy election to record forfeitures as they occur rather than make use of an estimate. Using a modified retrospective approach, the Company recorded an immaterial cumulative effect adjustment from retained earnings to additional paid-in-capital. The other provisions did not have a material impact on the Company's financial statements upon adoption. Accounting pronouncements not yet adopted by the Company (in order of effective date of implementation) In May 2014, the FASB issued ASU No. 2014-09, "Revenue from Contracts with Customers (Topic 606)." This ASU is intended to create a single source of revenue guidance which is more principles based than current revenue guidance. The guidance affects any entity that either enters into contracts with customers to transfer goods or services, or enters into contracts for the transfer of non-financial assets, unless those contracts are within the scope of other standards. In August 2015, the FASB issued ASU 2015-14, "Revenue from Contracts with Customers (Topic 606): Deferral of the Effective Date" to amend the effective date of ASU 2014-09. The amendments in ASU 2014-09 are effective for annual and interim periods within fiscal years beginning after December 15, 2017. Earlier adoption is permitted only as of annual reporting periods beginning after December 15, 2016, including interim reporting periods within that reporting period. The FASB has since issued additional related ASUs amendments intended to clarify certain aspects and improve understanding of the implementation guidance of Topic 606 but do not change the core principles of the guidance in Topic 606. The effective date and transition requirements for the amendments are the same as the effective date and transition requirements of Topic 606. The Company is currently evaluating the potential impact of the ASU and its amendments on the Company's financial statements, results of operations, and disclosures and does not currently plan to early adopt. Based on the Company's preliminary evaluations to date, and because the largest portion of the Company's revenue, interest income and various loan fees, are specifically excluded from the scope of this ASU, and because the Company currently recognizes the majority of the remaining revenue sources in a manner that management believes is consistent with the new ASU, management believes that revenue recognized under the new standard will generally approximate revenue recognized under current GAAP. The foregoing observations are subject to change as management completes their evaluation. In January 2016, the FASB issued ASU No. 2016-01, "Financial Instruments - Overall (Subtopic 825-10): Recognition and Measurement of Financial Assets and Financial Liabilities," which updates certain aspects of recognition, measurement, presentation and disclosure of financial instruments. Among other things, the new guidance: • Requires equity investments (except those accounted for under the equity method of accounting, or those that result in consolidation of the investee) to be measured at fair value with changes in fair value recognized in net income; • Requires public business entities to use the exit price notion when measuring the fair value of financial instruments for disclosure purposes; and • Requires separate presentation of financial assets and financial liabilities by measurement category and form of financial asset (i.e., securities or loans and receivables) on the balance sheet or the accompanying notes to the financial statements. The new guidance is effective for public companies for fiscal years beginning after December 15, 2017, including interim periods within those fiscal years. The Company is currently evaluating the effects of this ASU on the Company's financial statements, results of operations and disclosures. Based on the Company's evaluation to date, management believes the more significant implications upon adoption of this ASU will be the potential recognition of changes in fair value of the Company's equity portfolio in net income. Under current GAAP, net unrealized appreciation or depreciation on the equity portfolio, net of applicable income taxes, are reflected as a component of accumulated other comprehensive income. The net unrealized gain or loss on equity securities will fluctuate based on changes in the market value of the mutual funds and individual securities held in the portfolio. For the six months ended June 30, 2017 , other comprehensive income, net of taxes, generated from the equity portfolio amounted to $47 thousand , compared to other comprehensive loss of $28 thousand generated for the six months ended June 30, 2016 . Any potential future changes in fair value of the equity portfolio will depend on the amount of dollars invested in the portfolio and the potential magnitude of changes in equity market values. The foregoing observations are subject to change as management completes their evaluation. In August 2016, the FASB issued ASU No. 2016-15, "Statement of Cash flows (Topic 230) - Classification of Certain Cash Receipts and Cash Payments." The amendments are intended to reduce diversity in practice related to the presentation of eight specific cash flow issues. For public business entities that are SEC filers, such as the Company, the amendments in this Update are effective for fiscal years beginning after December 15, 2017, including interim periods within those fiscal years. Because this amendment primarily impacts the presentation and classification of information, the Company does not expect this ASU to have an impact on the Company's financial statements and results of operations. In November 2016, the FASB issued ASU No. 2016-18, "Statement of Cash flows-Restricted Cash (Topic 230)." The amendments in this Update clarify the inclusion of restricted cash in the cash and cash equivalents beginning-of-period and end-of period reconciliation on the statement of cash flows. For public business entities that are SEC filers, such as the Company, the amendments in this Update are effective for fiscal years beginning after December 15, 2017, including interim periods within those fiscal years. Because this amendment primarily impacts the presentation and classification of information, the Company does not expect this ASU to have an impact on the Company's financial statements and results of operations. In March 2017, the FASB issued ASU No. 2017-07, "Compensation-Retirement Benefits (Topic 715): Improving the Presentation of Net Periodic Pension Cost and Net Periodic Postretirement Benefit Cost." The amendments in this Update outline the presentation, classification and disclosure requirements for service cost and other components of net benefit costs. For public business entities that are SEC filers, such as the Company, the amendments in this Update are effective for fiscal years beginning after December 15, 2017, including interim periods within those fiscal years. Early adoption is permitted. Because this amendment primarily impacts the presentation and classification of information, the Company does not expect this ASU to have an impact on the Company's financial statements and results of operations. In May 2017, the FASB issued ASU No. 2017-09, "Compensation - Stock Compensation (Topic 718): Scope of Modification Accounting." The amendments in this Update apply to entities that change the terms of an outstanding share-based payment award. The amendments are intended to reduce diversity in practice as well as cost and complexity when applying guidance in Topic 718 to the modification of the terms and conditions of a share-based payment award. This ASU provides guidance on the three modifications to share-based payment awards and conditions that must be met in order to exempt an entity from modification accounting under topic 718. The amendments in this Update apply prospectively to award modifications on or after the adoption date, and are effective for fiscal years beginning after December 15, 2017, including interim periods within those fiscal years. The Company currently does not expect that adoption of the ASU will have a material impact on its financial statements, results of operations or disclosures. In February 2016, the FASB issued ASU No. 2016-02, "Leases (Topic 842)," which supersedes previous leasing guidance in Topic 840, Leases. Under the new guidance, lessees are required to recognize lease assets and lease liabilities on the balance sheet for all leases with terms longer than 12 months. Leases will be classified as either finance or operating, with classification affecting the pattern of expense recognition in the income statement. The new standard is effective for fiscal years beginning after December 15, 2018, including interim periods within those fiscal years. A modified retrospective transition approach is required for lessees for capital and operating leases existing at, or entered into after, the beginning of the earliest comparative period presented in the financial statements, with certain practical expedients available. The Company is currently evaluating the effects of this ASU on the Company's financial statements, results of operations and disclosures. Based on the Company's evaluation to date, management believes the more significant implication of this ASU on the Company relates to operating leases of our facilities, mainly branch leases. As of June 30, 2017 , the Company had leases on 17 of its locations, including branches and part of its main campus, and expects that upon adoption of this ASU the balance sheet will reflect both lease liabilities, equal to the present value of lease payments, and right-of-use assets, equal to the lease liability plus payments made to lessors adjusted for prepaid or accrued rent and any initial direct cost incurred. In addition, the Company will recognize lease expense in the income statement on a straight-line basis similar to current operating leases. The straight-line expense will reflect the interest expense on the lease liability (effective interest method) and amortization of the right-of-use asset. Lease expense will be presented as a single line item in the operating expense section of the income statement. Management believes that lease expense under the new standard will generally approximate lease expense under current GAAP. The foregoing observations are subject to change as management completes their evaluation. In March 2017, the FASB issued ASU No. 2017-08, "Receivables-Nonrefundable Fees and Other Costs (Subtopic 310-20): Premium Amortization on Purchased Callable Debt Securities." The amendments shorten the amortization period to the earliest call date for certain callable debt securities held at a premium. The accretion for securities held at a discount is not affected by this statement and remains unchanged. The new standard is effective for fiscal years beginning after December 15, 2018, including interim periods within those fiscal years. A modified retrospective basis is required upon adoption. Early adoption is permitted. The Company has assessed the impact of this ASU and does not expect that it will have a material impact on the Company's financial statements, results of operations and disclosures upon adoption. In June 2016, the FASB issued ASU No. 2016-13, "Financial Instruments - Credit Losses (Topic 326): Measurement of Credit Losses on Financial Instruments." The amendments in this ASU require a financial asset (or a group of financial assets) measured at amortized cost basis to be presented at the net amount expected to be collected. Previously, when credit losses were measured under GAAP, an entity generally only considered past events and current conditions in measuring the incurred loss and generally recognition of the full amount of credit losses was delayed until the loss was probable of occurring. The amendments in this ASU eliminate the probable initial recognition threshold in current GAAP and, instead, reflect an entity’s current estimate of all expected credit losses. The measurement of expected credit losses is based on relevant information about past events, including historical experience, current conditions, and reasonable and supportable forecasts that affect the collectability of the reported amount. An entity must use judgment in determining the relevant information and estimation methods that are appropriate in its circumstances. The income statement reflects the measurement of credit losses for newly recognized financial assets, as well as the expected increases or decreases of expected credit losses that have taken place during the period. The allowance for credit losses is a valuation account that is deducted from the amortized cost basis of the financial asset(s) to present the net carrying value at the amount expected to be collected on the financial asset. Credit losses on available-for-sale debt securities should be measured in a manner similar to current GAAP. However, the amendments in this Update require that credit losses be presented as an allowance rather than as a write-down. Unlike current GAAP, the ASU provides for reversals of credit losses in future period net income in situations where the estimate of loss declines. An entity will apply the amendments in this Update through a cumulative-effect adjustment to retained earnings as of the beginning of the first reporting period in which the guidance is effective (that is, a modified-retrospective approach). For public business entities that are SEC filers, such as the Company, the amendments in this Update are effective for fiscal years beginning after December 15, 2019, including interim periods within those fiscal years. Early adoption for fiscal years beginning after December 15, 2018 is permitted. The Company has established an implementation committee and an enterprise-wide implementation plan for this ASU, which will consider the impact to operations, financial results, disclosures and controls. At present, the impact of the adoption of ASU No. 2016-13 on the Company's operations, financial results, disclosures, and controls is unknown. In January 2017, the FASB issued ASU No. 2017-04, "Intangibles-Goodwill and Other (Topic 350)-Simplifying the Test for Goodwill Impairment." The main provision in this ASU eliminated Step 2 of the goodwill impairment test and instead requires an entity to perform its annual, or interim, goodwill impairment test by comparing the fair value of the reporting unit with its carrying amount. An impairment charge would be recognized for the amount the carrying value exceeds the reporting unit's fair value as long as the amount recognized doesn't exceed the amount of goodwill allocated to the reporting unit. For public business entities that are SEC filers, such as the Company, the amendments in this Update are effective for fiscal years beginning after December 15, 2019, including interim periods within those fiscal years. Early adoption is permitted for impairment tests performed on testing dates after January 1, 2017. Goodwill carried on the Company’s consolidated financial statements was $5.7 million at both June 30, 2017 and December 31, 2016 . This asset is related to the Company’s acquisition of two branch offices in July 2000. The Company does not expect the adoption of ASU No. 2017-01 to have a material impact on the Company's financial statements and results of operations.

Investment Securities

Investment Securities	6 Months Ended
	Jun. 30, 2017
Investments, Debt and Equity Securities [Abstract]
Investment Securities	Investment Securities The amortized cost and carrying values of investment securities at the dates specified are summarized as follows: June 30, 2017 (Dollars in thousands) Amortized cost Unrealized gains Unrealized losses Fair Value Federal agency obligations (1) $ 74,736 $ 492 $ 39 $ 75,189 Residential federal agency MBS (1) 96,307 339 932 95,714 Commercial federal agency MBS (1) 76,800 380 743 76,437 Municipal securities 119,598 2,866 306 122,158 Corporate bonds 11,269 129 31 11,367 Certificates of deposits (2) 950 3 — 953 Total debt securities 379,660 4,209 2,051 381,818 Equity investments 3,884 2,311 8 6,187 Total investment securities, at fair value $ 383,544 $ 6,520 $ 2,059 $ 388,005 December 31, 2016 (Dollars in thousands) Amortized cost Unrealized gains Unrealized losses Fair Value Federal agency obligations (1) $ 74,682 $ 432 $ 45 $ 75,069 Residential federal agency MBS (1) 94,818 96 1,561 93,353 Commercial federal agency MBS (1) 71,993 15 1,730 70,278 Municipal securities 112,401 922 1,520 111,803 Corporate bonds 10,734 51 90 10,695 Certificates of deposits (2) 950 — 1 949 Total debt securities 365,578 1,516 4,947 362,147 Equity investments 10,413 2,532 302 12,643 Total investment securities, at fair value $ 375,991 $ 4,048 $ 5,249 $ 374,790 __________________________________________ (1) These categories may include investments issued or guaranteed by government sponsored enterprises such as Fannie Mae ("FNMA"), Freddie Mac ("FHLMC"), Federal Farm Credit Bank ("FFCB"), or one of several Federal Home Loan Banks, as well as, investments guaranteed by Ginnie Mae ("GNMA"), a wholly-owned government entity. (2) Certificates of deposits ("CDs") represent term deposits issued by banks that are subject to FDIC insurance and purchased on the open market. Included in the residential and commercial federal agency MBS categories were collateralized mortgage obligations (“CMOs”) issued by U.S. agencies with fair values totaling $106.0 million and $107.0 million at June 30, 2017 and December 31, 2016 , respectively. At June 30, 2017 , the equity portfolio consisted of investments in mutual funds, as well as investments in individual common stock of entities in the financial services industry (approximately 46% ). As of the dates reflected in the tables above, all of the Company’s investment securities were classified as available-for-sale and carried at fair value. Net unrealized appreciation and depreciation on investments available-for-sale, net of applicable income taxes, are reflected as a component of accumulated other comprehensive income (loss). The net unrealized gain or loss in the Company's debt security portfolio fluctuates as market interest rates rise and fall. Due to the predominantly fixed rate nature of this portfolio, as market rates fall, the value of the portfolio rises, and as market rates rise, the value of the portfolio declines. The unrealized gains or losses on debt securities will also decline as the securities approach maturity. Unrealized gains or losses will be recognized in the income statement if the securities are sold. However, if an unrealized loss on a debt security portfolio is deemed to be other than temporary, the credit loss portion is charged to earnings and the noncredit portion is recognized in accumulated other comprehensive income (loss). The net unrealized gain or loss on equity securities will fluctuate based on changes in the market value of the mutual funds and individual securities held in the portfolio. Unrealized gains or losses will be recognized in the statements of income if the securities are sold. However, if an unrealized loss on an equity security is deemed to be other than temporary prior to a sale, the loss is charged to earnings. The following tables summarize investments (debt and equity) having temporary impairment, due to the fair market values having declined below the amortized costs of the individual investments, and the period that the investments have been temporarily impaired at June 30, 2017 and December 31, 2016 . June 30, 2017 Less than 12 months 12 months or longer Total (Dollars in thousands) Fair Value Unrealized Losses Fair Value Unrealized Losses Fair Value Unrealized Losses # of holdings Federal agency obligations $ 18,006 $ 39 $ — $ — $ 18,006 $ 39 5 Residential federal agency MBS 42,216 573 11,990 359 54,206 932 23 Commercial federal agency MBS 38,490 743 — — 38,490 743 11 Municipal securities 19,527 266 1,045 40 20,572 306 29 Corporate bonds 2,713 27 425 4 3,138 31 19 Certificates of deposit — — — — — — — Equity investments 215 8 — — 215 8 4 Total temporarily impaired investment securities $ 121,167 $ 1,656 $ 13,460 $ 403 $ 134,627 $ 2,059 91 December 31, 2016 Less than 12 months 12 months or longer Total (Dollars in thousands) Fair Value Unrealized Losses Fair Value Unrealized Losses Fair Value Unrealized Losses # of holdings Federal agency obligations $ 13,956 $ 45 $ — $ — $ 13,956 $ 45 3 Residential federal agency MBS 68,138 1,236 8,008 325 76,146 1,561 31 Commercial federal agency MBS 60,060 1,730 — — 60,060 1,730 18 Municipal securities 60,436 1,520 — — 60,436 1,520 107 Corporate bonds 5,729 90 — — 5,729 90 37 Certificates of deposit 949 1 — — 949 1 4 Equity investments 1,185 20 2,743 282 3,928 302 3 Total temporarily impaired investment securities $ 210,453 $ 4,642 $ 10,751 $ 607 $ 221,204 $ 5,249 203 During the six months ended June 30, 2017 and 2016 , the Company did not record any fair value impairment charges on its investments. Management regularly reviews the portfolio for securities with unrealized losses that are other-than-temporarily impaired. At June 30, 2017 , management attributes the unrealized losses in the portfolio to increases in current market yields compared to the yields at the time the investments were purchased by the Company for debt securities and the impact of market value fluctuations on the equity portion of our portfolio. As of June 30, 2017 , management did not consider its debt securities to be other-than-temporarily impaired because (1) the decline in market value is not attributable to a fundamental deterioration in quality of the securities or the issuers, and (2) the Company did not intend to sell, and it is more likely than not that it will not be required to, sell those investments prior to a market price recovery or maturity with recovery of the amortized cost. Management did not consider equity investments to be other than temporarily impaired at June 30, 2017 because (1) the decline in market value is not attributable to a fundamental deterioration in the issuer or the equity fund and (2) the Company has the ability and intent to hold the investment until an anticipated market price recovery. In assessing the Company's investments in federal agency mortgage-backed securities and federal agency obligations, the contractual cash flows of these investments are guaranteed by the respective government sponsored enterprise (FHLMC, FNMA, FFCB, or FHLB) or wholly-owned government corporation (GNMA). Accordingly, it is expected that the securities would not be settled at a price less than the par value of the Company's investments. Management's assessment of other debt securities within the portfolio includes reviews of market pricing, ongoing credit quality evaluations, assessment of the investments' materiality, and duration of the investments' unrealized loss position. In addition, the Company utilizes an outside registered investment adviser to manage the corporate and municipal bond portfolios, within prescribed guidelines set by management, and to provide assistance in assessing the credit risk of those portfolios. At June 30, 2017 , the Company's corporate and municipal bond portfolios did not contain any securities below investment grade, as reported by major credit rating agencies. For equities and funds, management's assessment includes the severity of the declines, whether it is unlikely that the security or fund will completely recover its unrealized loss within a reasonable time period and if the equity security or fund exhibits fundamental deterioration. The contractual maturity distribution at June 30, 2017 of total debt securities was as follows: (Dollars in thousands) Amortized Cost Fair Value Due in one year or less $ 18,242 $ 18,283 Due after one, but within five years 112,036 113,033 Due after five, but within ten years 138,224 139,270 Due after ten years 111,158 111,232 Total debt securities $ 379,660 $ 381,818 Scheduled contractual maturities shown above may not reflect the actual maturities of the investments. The actual MBS/CMO cash flows likely will be faster than presented above due to prepayments and amortization. Similarly, included in the fair value of debt securities above are callable securities, comprised of municipal securities and corporate bonds totaling $52.2 million , which can be redeemed by the issuer prior to the maturity presented above. Management considers these factors when evaluating the interest rate risk in the Company's asset-liability management program. From time to time, the Company may pledge securities as collateral for deposit account balances of municipal customers, and for borrowing capacity with the FHLB and the Federal Reserve Bank of Boston (the "FRB"). The fair value of securities pledged as collateral for these purposes was $ 378.7 million at June 30, 2017 . Sales of investments, including pending trades based on trade date, if applicable, for the three and six months ended June 30, 2017 and June 30, 2016 are summarized as follows: Three months ended June 30, Six months ended June 30, (Dollars in thousands) 2017 2016 2017 2016 Amortized cost of investments sold (1) $ 252 $ 1,460 $ 9,368 $ 1,764 Gross realized gains on sales 229 63 875 65 Gross realized losses on sales — — (106 ) — Total proceeds from sales of investments $ 481 $ 1,523 $ 10,137 $ 1,829 _________________________________________ (1) Amortized cost of investments sold is determined on a specific identification basis. See Note 12, "Fair Value Measurements," below for further information regarding the Company's fair value measurements for available-for-sale securities.

Loans

Loans	6 Months Ended
	Jun. 30, 2017
Receivables [Abstract]
Loans	Loans The Company specializes in lending to business entities, non-profit organizations, professionals and individuals. The Company's primary lending focus is on the development of high quality commercial relationships achieved through active business development efforts, long-term relationships with established commercial developers, strong community involvement and focused marketing strategies. Loans made to businesses include commercial mortgage loans, construction and land development loans, secured and unsecured commercial loans and lines of credit, and standby letters of credit. The Company also originates equipment lease financing for businesses. Loans made to individuals include conventional residential mortgage loans, home equity loans and lines, residential construction loans on primary and secondary residences, and secured and unsecured personal loans and lines of credit. The Company manages its loan portfolio to avoid concentration by industry and relationship size to lessen its credit risk exposure. See Note 4, "Allowance for Loan Losses," for information on the Company's credit risk management, non-accrual, impaired and troubled debt restructured loans and the allowance for loan losses. Major classifications of loans at the periods indicated were as follows: (Dollars in thousands) June 30, December 31, Commercial real estate $ 1,107,714 $ 1,038,082 Commercial and industrial 505,240 490,799 Commercial construction 218,277 213,447 Total commercial loans 1,831,231 1,742,328 Residential mortgages 188,941 180,560 Home equity loans and lines 86,394 91,065 Consumer 10,064 10,845 Total retail loans 285,399 282,470 Gross loans 2,116,630 2,024,798 Deferred loan origination fees, net (2,230 ) (2,069 ) Total loans 2,114,400 2,022,729 Allowance for loan losses (31,958 ) (31,342 ) Net loans $ 2,082,442 $ 1,991,387 Loan Categories - Commercial loans: Commercial real estate loans include loans secured by both owner-use and non-owner occupied real estate. These loans are typically secured by a variety of commercial and industrial property types, including one-to-four and multi-family apartment buildings, office, industrial or mixed-use facilities, strip shopping centers, or other commercial properties, and are generally guaranteed by the principals of the borrower. Commercial real estate loans generally have repayment periods of approximately fifteen to twenty-five years. Variable interest rate loans have a variety of adjustment terms and underlying interest rate indices, and are generally fixed for an initial period before periodic rate adjustments begin. Commercial and industrial loans include seasonal revolving lines of credit, working capital loans, equipment financing (including equipment leases), and term loans. Also included in commercial and industrial loans are loans partially guaranteed by the U.S. Small Business Administration ("SBA"), and loans under various programs and agencies. Commercial and industrial credits may be unsecured loans and lines to financially strong borrowers, loans secured in whole or in part by real estate unrelated to the principal purpose of the loan or secured by inventories, equipment, or receivables, and are generally guaranteed by the principals of the borrower. Variable rate loans and lines in this portfolio have interest rates that are periodically adjusted, with loans generally having fixed initial periods. Commercial and industrial loans have average repayment periods of one to seven years. Commercial construction loans include the development of residential housing and condominium projects, the development of commercial and industrial use property, and loans for the purchase and improvement of raw land. These loans are secured in whole or in part by underlying real estate collateral and are generally guaranteed by the principals of the borrowers. Construction lenders work to cultivate long-term relationships with established developers. The Company limits the amount of financing provided to any single developer for the construction of properties built on a speculative basis. Funds for construction projects are disbursed as pre-specified stages of construction are completed. Regular site inspections are performed, prior to advancing additional funds, at each construction phase, either by experienced construction lenders on staff or by independent outside inspection companies. Commercial construction loans generally are variable rate loans and lines with interest rates that are periodically adjusted and generally have terms of one to three years. From time to time, the Company participates with other banks in the financing of certain commercial projects. Participating loans with other institutions provide banks the opportunity to retain customer relationships and reduce credit risk exposure among each participating bank, while providing customers with larger credit vehicles than the individual bank might be willing or able to offer independently. In some cases, the Company may act as the lead lender, originating and servicing the loans, but participating out a portion of the funding to other banks. In other cases, the Company may participate in loans originated by other institutions. In each case, the participating bank funds a percentage of the loan commitment and takes on the related pro-rata risk. In each case in which the Company participates in a loan, the rights and obligations of each participating bank are divided proportionately among the participating banks in an amount equal to their share of ownership and with equal priority among all banks. When the participation qualifies as a sale under GAAP, the balances participated out to other institutions are not carried as assets on the Company's financial statements. The Company performs an independent credit analysis of each commitment and a review of the participating institution prior to participation in the loan, and an annual review thereafter of each participating institution. Loans originated by other banks in which the Company is a participating institution are carried in the loan portfolio at the Company's pro rata share of ownership. Loans originated by other banks in which the Company is a participating institution amounted to $86.6 million at June 30, 2017 and $85.2 million at December 31, 2016 . See also "Loans serviced for others" below for information related to commercial loans participated out to various other institutions. Standby letters of credit are conditional commitments issued by the Company to guarantee the financial obligation or performance of a customer to a third party. The credit risk involved in issuing letters of credit is essentially the same as that involved in extending loan facilities to customers. If the letter of credit is drawn upon, a loan is created for the customer, generally a commercial loan, with the same criteria associated with similar commercial loans. - Residential loans: Enterprise originates conventional mortgage loans on one-to-four family residential properties. These properties may serve as the borrower's primary residence, or as vacation homes or investment properties. Loan-to-value limits vary, generally from 75% for multi-family, owner-occupied properties, up to 97% for single family, owner-occupied properties, with mortgage insurance coverage required for loan-to-value ratios greater than 80% based on program parameters. In addition, financing is provided for the construction of owner-occupied primary and secondary residences. Residential mortgage loans may have terms of up to 30 years at either fixed or adjustable rates of interest. Fixed and adjustable rate residential mortgage loans are generally originated using secondary market underwriting and documentation standards. Depending on the current interest rate environment, management projections of future interest rates and the overall asset-liability management program of the Company, management may elect to sell those fixed and adjustable rate residential mortgage loans which are eligible for sale in the secondary market, or hold some or all of this residential loan production for the Company's portfolio. Mortgage loans are generally not pooled for sale, but instead sold on an individual basis. The Company may retain or sell the servicing when selling the loans. Loans sold are subject to standard secondary market underwriting and eligibility representations and warranties over the life of the loan and are subject to an early payment default period covering the first four payments for certain loan sales. Loans classified as held for sale are carried as a separate line item on the balance sheet. - Home equity loans and lines of credit: Home equity term loans are originated for one-to-four family residential properties with maximum original loan-to-value ratios generally up to 80% of the automated valuation or appraised value of the property securing the loan. Home equity loan payments consist of monthly principal and interest based on amortization ranging from three to fifteen years. The rates may be variable or fixed. The Company originates home equity revolving lines of credit for one-to-four family residential properties with maximum original loan-to-value ratios generally up to 80% of the automated valuation or appraised value of the property securing the loan. Home equity lines generally have interest rates that adjust monthly based on changes in the Wall Street Journal Prime Rate, although minimum rates may be applicable. Some home equity line rates may be fixed for a period of time and then adjusted monthly thereafter. The payment schedule for home equity lines requires interest only payments for the first ten years of the lines. Generally at the end of ten years, the line may be frozen to future advances, and principal plus interest payments are collected over a fifteen -year amortization schedule or, for eligible borrowers meeting certain requirements, the line availability may be extended for an additional interest only period. - Consumer loans: Consumer loans consist primarily of secured or unsecured personal loans, loans under energy efficiency financing programs in conjunction with Massachusetts public utilities, and overdraft protection lines on checking accounts extended to individual customers. The aggregate amount of overdrawn deposit accounts are reclassified as loan balances. Loans serviced for others At June 30, 2017 and December 31, 2016 , the Company was servicing residential mortgage loans owned by investors amounting to $17.5 million and $18.7 million , respectively. Additionally, the Company was servicing commercial loans participated out to various other institutions amounting to $65.8 million and $62.3 million at June 30, 2017 and December 31, 2016 , respectively. See the discussion above under the heading "Commercial loans" for further information regarding commercial participations. Loans serving as collateral Loans designated as qualified collateral and pledged to the FHLB for borrowing capacity for the periods indicated are summarized below: (Dollars in thousands) June 30, December 31, Commercial real estate $ 233,768 $ 247,664 Residential mortgages 176,766 170,247 Home equity 10,449 12,340 Total loans pledged to FHLB $ 420,983 $ 430,251 See Note 12, "Fair Value Measurements," below for further information regarding the Company's fair value measurements for loans, and Note 7, "Derivatives and Hedging Activities," below for information regarding interest-rate swap agreements related to certain commercial loans.

Allowance For Loan Loss

Allowance For Loan Loss	6 Months Ended
	Jun. 30, 2017
Receivables [Abstract]
Allowance for Loan Loss	Allowance for Loan Losses Allowance for probable loan losses methodology On a quarterly basis, management prepares an estimate of the allowance necessary to cover estimated probable credit losses. The Company uses a systematic methodology to measure the amount of estimated loan loss exposure inherent in the portfolio for purposes of establishing a sufficient allowance for loan losses. The methodology makes use of specific reserves for loans individually evaluated and deemed impaired, and general reserves for larger groups of homogeneous loans, which are collectively evaluated relying on a combination of qualitative and quantitative factors that may affect credit quality of the pool. There have been no material changes to the Company's underwriting practices, credit risk management system, or to the allowance assessment methodology used to estimate loan loss exposure as reported in the 2016 Annual Report on Form 10-K. Refer to Note 4, "Allowance for Loan Losses," to the Company's consolidated financial statements contained in the 2016 Annual Report on Form 10-K for further discussion of management's methodology used to estimate a sufficient allowance for loan losses, the credit risk management function and adversely classified loan rating system. The balances of loans as of June 30, 2017 by segment and evaluation method are summarized as follows: (Dollars in thousands) Loans individually evaluated for impairment Loans collectively evaluated for impairment Gross Loans Commercial real estate $ 15,584 $ 1,092,130 $ 1,107,714 Commercial and industrial 12,503 492,737 505,240 Commercial construction 1,619 216,658 218,277 Residential mortgages 272 188,669 188,941 Home equity loans and lines 494 85,900 86,394 Consumer 13 10,051 10,064 Total gross loans $ 30,485 $ 2,086,145 $ 2,116,630 The balances of loans as of December 31, 2016 by segment and evaluation method are summarized as follows: (Dollars in thousands) Loans individually evaluated for impairment Loans collectively evaluated for impairment Gross Loans Commercial real estate $ 14,261 $ 1,023,821 $ 1,038,082 Commercial and industrial 13,372 477,427 490,799 Commercial construction 3,364 210,083 213,447 Residential mortgages 289 180,271 180,560 Home equity loans and lines 509 90,556 91,065 Consumer 1 10,844 10,845 Total gross loans $ 31,796 $ 1,993,002 $ 2,024,798 Credit quality indicators Early detection of credit issues is critical to minimize credit losses. Accordingly, management regularly monitors internal credit quality indicators such as the risk classification of individual loans, individual review of problem assets, past due and non-accrual loans, impaired and restructured loans, and the level of foreclosure activity, as well as trends in the general levels of these indicators. These credit quality indicators are discussed below. Adversely classified loans The Company's loan risk rating system classifies loans depending on risk of loss characteristics. Loans which are evaluated to be of weaker credit quality are placed on the "watch credit listing" and reviewed on a more frequent basis by management. The classifications range from "substantially risk free" for the highest quality loans and loans that are secured by cash collateral, through a satisfactory range of "minimal," "moderate," "better than average," and "average" risk, to the regulatory problem-asset classifications of "criticized," for loans that may need additional monitoring, and the more severe adverse classifications of "substandard," "doubtful," and "loss" based on criteria established under banking regulations. Adversely classified loans may be accruing or in non-accrual status and may be additionally designated as impaired or restructured, or some combination thereof. The following tables present the Company's credit risk profile for each class of loan in its portfolio by internally assigned adverse risk rating category as of the periods indicated. June 30, 2017 Adversely Classified Not Adversely (Dollars in thousands) Substandard Doubtful Loss Classified Gross Loans Commercial real estate $ 15,915 $ — $ — $ 1,091,799 $ 1,107,714 Commercial and industrial 11,673 54 1 493,512 505,240 Commercial construction 1,620 — — 216,657 218,277 Residential mortgages 1,380 — — 187,561 188,941 Home equity loans and lines 644 — — 85,750 86,394 Consumer 41 — — 10,023 10,064 Total gross loans $ 31,273 $ 54 $ 1 $ 2,085,302 $ 2,116,630 December 31, 2016 Adversely Classified Not Adversely (Dollars in thousands) Substandard Doubtful Loss Classified Gross Loans Commercial real estate $ 16,003 $ — $ — $ 1,022,079 $ 1,038,082 Commercial and industrial 12,770 99 2 477,928 490,799 Commercial construction 3,364 — — 210,083 213,447 Residential mortgages 1,414 — — 179,146 180,560 Home equity loans and lines 666 — — 90,399 91,065 Consumer 30 — — 10,815 10,845 Total gross loans $ 34,247 $ 99 $ 2 $ 1,990,450 $ 2,024,798 Total adversely classified loans amounted to 1.48% of total loans at June 30, 2017 , as compared to 1.70% at December 31, 2016 . Past due and non-accrual loans The following tables present an age analysis of past due loans as of the dates indicated: Balance at June 30, 2017 (Dollars in thousands) 30-59 Days Past Due 60-89 Days Past Due Past Due 90 days or more Total Past Due Loans Current Loans Gross Loans Non-accrual Loans Commercial real estate $ 1,703 $ 74 $ 4,420 $ 6,197 $ 1,101,517 $ 1,107,714 $ 8,446 Commercial and industrial 308 1,411 1,463 3,182 502,058 505,240 3,744 Commercial construction 1,140 — — 1,140 217,137 218,277 200 Residential mortgages 128 — 186 314 188,627 188,941 272 Home equity loans and lines 88 96 212 396 85,998 86,394 594 Consumer 47 17 7 71 9,993 10,064 20 Total gross loans $ 3,414 $ 1,598 $ 6,288 $ 11,300 $ 2,105,330 $ 2,116,630 $ 13,276 Balance at December 31, 2016 (Dollars in thousands) 30-59 Days Past Due 60-89 Days Past Due Past Due 90 days or more Total Past Due Loans Current Loans Gross Loans Non-accrual Loans Commercial real estate $ 5,993 $ 923 $ 1,399 $ 8,315 $ 1,029,767 $ 1,038,082 $ 4,876 Commercial and industrial 267 4 1,544 1,815 488,984 490,799 3,174 Commercial construction — — — — 213,447 213,447 519 Residential mortgages 648 — 99 747 179,813 180,560 289 Home equity loans and lines 270 — 269 539 90,526 91,065 616 Consumer 94 13 11 118 10,727 10,845 11 Total gross loans $ 7,272 $ 940 $ 3,322 $ 11,534 $ 2,013,264 $ 2,024,798 $ 9,485 At June 30, 2017 and December 31, 2016 , all loans past due 90 days or more were carried as non-accrual, in addition to those loans where reasonable doubt exists as to the full and timely collection of interest or principal that have also been designated as non-accrual, despite their payment due status shown in the tables above. Non-accrual loans that were not adversely classified amounted to $81 thousand at June 30, 2017 and $220 thousand at December 31, 2016 . These balances primarily represented the guaranteed portions of non-performing SBA loans. The majority of the non-accrual loan balances were also carried as impaired loans during the periods noted, and are discussed further below. The ratio of non-accrual loans to total loans amounted to 0.63% at June 30, 2017 , and 0.47% at December 31, 2016 . At June 30, 2017 , additional funding commitments for non-accrual loans was not material. Impaired loans Impaired loans are individually significant loans for which management considers it probable that not all amounts due (principal and interest) in accordance with the original contractual terms will be collected. Impaired loans are individually evaluated for credit loss and a specific allowance reserve is assigned for the amount of the estimated probable credit loss. The majority of impaired loans are included within the non-accrual balances; however, not every loan on non-accrual status has been designated as impaired. Impaired loans include loans that have been modified in a troubled debt restructuring ("TDR,") see below. The carrying value of impaired loans amounted to $30.5 million and $31.8 million at June 30, 2017 and December 31, 2016 , respectively. Total accruing impaired loans amounted to $17.3 million and $22.4 million at June 30, 2017 and December 31, 2016 , respectively, while non-accrual impaired loans amounted to $13.2 million and $9.4 million as of June 30, 2017 and December 31, 2016 , respectively. The following tables set forth the recorded investment in impaired loans and the related specific allowance allocated as of the dates indicated: Balance at June 30, 2017 (Dollars in thousands) Unpaid contractual principal balance Total recorded investment in impaired loans Recorded investment with no allowance Recorded investment with allowance Related specific allowance Commercial real estate $ 17,181 $ 15,584 $ 13,213 $ 2,371 $ 393 Commercial and industrial 13,183 12,503 8,749 3,754 1,771 Commercial construction 1,667 1,619 1,619 — — Residential mortgages 381 272 272 — — Home equity loans and lines 659 494 494 — — Consumer 14 13 — 13 13 Total $ 33,085 $ 30,485 $ 24,347 $ 6,138 $ 2,177 Balance at December 31, 2016 (Dollars in thousands) Unpaid contractual principal balance Total recorded investment in impaired loans Recorded investment with no allowance Recorded investment with allowance Related specific allowance Commercial real estate $ 16,010 $ 14,261 $ 12,444 $ 1,817 $ 370 Commercial and industrial 14,291 13,372 9,366 4,006 2,222 Commercial construction 3,408 3,364 3,051 313 28 Residential mortgages 388 289 289 — — Home equity loans and lines 665 509 509 — — Consumer 2 1 — 1 1 Total $ 34,764 $ 31,796 $ 25,659 $ 6,137 $ 2,621 The following table presents the average recorded investment in impaired loans and the related interest recognized during the three months indicated: Three Months Ended June 30, 2017 Three Months Ended June 30, 2016 (Dollars in thousands) Average recorded investment Interest income recognized Average recorded investment Interest income recognized Commercial real estate $ 14,403 $ 78 $ 12,700 $ 64 Commercial and industrial 12,367 76 8,090 39 Commercial construction 1,622 22 3,089 37 Residential mortgages 279 — 304 — Home equity loans and lines 565 — 306 — Consumer 15 — 20 — Total $ 29,251 $ 176 $ 24,509 $ 140 The following table presents the average recorded investment in impaired loans and the related interest recognized during the periods indicated: Six Months Ended June 30, 2017 Six Months Ended June 30, 2016 (Dollars in thousands) Average recorded investment Interest income recognized Average recorded investment Interest income recognized Commercial real estate $ 13,891 $ 179 $ 11,184 $ 107 Commercial and industrial 12,623 181 8,257 65 Commercial construction 2,017 49 3,032 74 Residential mortgages 283 — 306 — Home equity loans and lines 552 (2 ) 276 (2 ) Consumer 14 — 21 — Total $ 29,380 $ 407 $ 23,076 $ 244 At June 30, 2017 , additional funding commitments for impaired loans totaled $394 thousand . The Company's obligation to fulfill the additional funding commitments on impaired loans is generally contingent on the borrower's compliance with the terms of the credit agreement. If the borrower is not in compliance, additional funding commitments may or may not be made at the Company's discretion. Troubled debt restructurings Loans are designated as a TDR when, as part of an agreement to modify the original contractual terms of the loan as a result of financial difficulties of the borrower, the Bank grants the borrower a concession on the terms, that would not otherwise be considered. Typically, such concessions may consist of a reduction in interest rate to a below market rate, taking into account the credit quality of the note, extension of additional credit based on receipt of adequate collateral, or a deferment or reduction of payments (principal or interest) which materially alters the Bank's position or significantly extends the note's maturity date, such that the present value of cash flows to be received is materially less than those contractually established at the loan's origination. Total TDR loans, included in the impaired loan balances above, as of June 30, 2017 and December 31, 2016 , were $23.3 million and $27.0 million , respectively. TDR loans on accrual status amounted to $17.3 million and $22.4 million at June 30, 2017 and December 31, 2016 , respectively. TDR loans included in non-performing loans amounted to $6.0 million and $4.6 million at June 30, 2017 and December 31, 2016 , respectively. The Company continues to work with customers, particularly commercial relationships, and enters into loan modifications to the extent deemed to be necessary or appropriate while attempting to achieve the best mutual outcome given the individual financial circumstances and future prospects of the borrower. At June 30, 2017 , additional funding commitments for TDR loans totaled $394 thousand . The Company's obligation to fulfill the additional funding commitments on TDR loans is generally contingent on the borrower's compliance with the terms of the credit agreement. If the borrower is not in compliance, additional funding commitments may or may not be made at the Company's discretion. The following table sets forth the post modification balances of TDRs listed by type of modification for TDRs that occurred during the periods indicated. Six months ended (Dollars in thousands) June 30, 2017 June 30, 2016 Loan advances with adequate collateral $ 367 $ 6,337 Extended maturity date 5,739 201 Temporary payment reduction and payment re-amortization of remaining principal over extended term 1,086 — Temporary interest only payment plan 1,016 594 Total $ 8,208 $ 7,132 Loans modified as TDRs during the three month period ended June 30, 2017 are detailed below. Three months ended June 30, 2017 (Dollars in thousands) Number of restructurings Pre-modification outstanding recorded investment Post-modification outstanding recorded investment Commercial real estate 3 $ 929 $ 928 Commercial and industrial 10 2,213 2,326 Commercial construction 2 1,420 1,419 Residential mortgages — — — Home equity loans and lines — — — Consumer — — — Total 15 $ 4,562 $ 4,673 Payment defaults, during the three month period ended June 30, 2017 , on loans modified as TDRs within the preceding twelve months are detailed below. Three months ended June 30, 2017 (Dollars in thousands) Number of TDRs that defaulted Post- modification outstanding recorded investment Commercial real estate — $ — Commercial and industrial 5 1,457 Commercial construction — — Residential mortgages — — Home equity loans and lines — — Consumer — — Total 5 $ 1,457 Loans modified as TDRs during the six month period ended June 30, 2017 are detailed below. Six months ended June 30, 2017 (Dollars in thousands) Number of restructurings Pre-modification outstanding recorded investment Post-modification outstanding recorded investment Commercial real estate 4 $ 1,304 $ 1,299 Commercial and industrial 12 5,165 5,290 Commercial construction 3 1,626 1,619 Residential mortgages — — — Home equity loans and lines — — — Consumer — — — Total 19 $ 8,095 $ 8,208 There were no subsequent charge-offs associated with the new TDRs noted in the table above during the six months ended June 30, 2017 . At June 30, 2017 , there were $376 thousand specific reserves allocated to the TDRs entered into during the 2017 period as management considered it likely that the majority of outstanding principal will ultimately be collected. Payment defaults, during the six month period ended June 30, 2017 , on loans modified as TDRs within the preceding twelve months are detailed below. Six months ended June 30, 2017 (Dollars in thousands) Number of TDRs that defaulted Post- modification outstanding recorded investment Commercial real estate 2 $ 734 Commercial and industrial 6 1,687 Commercial construction — — Residential mortgages — — Home equity loans and lines — — Consumer — — Total 8 $ 2,421 Loans modified as TDRs during the three month period ended June 30, 2016 are detailed below. Three months ended June 30, 2016 (Dollars in thousands) Number of restructurings Pre-modification outstanding recorded investment Post-modification outstanding recorded investment Commercial real estate 4 $ 5,093 $ 5,059 Commercial and industrial 5 1,794 1,810 Commercial construction — — — Residential mortgages — — — Home equity loans and lines — — — Consumer — — — Total 9 $ 6,887 $ 6,869 Payment defaults, during the three months ended June 30, 2016 , on loans modified as TDRs within the preceding twelve months are detailed below. Three months ended June 30, 2016 (Dollars in thousands) Number of TDRs that defaulted Post- modification outstanding recorded investment Commercial real estate — $ — Commercial and industrial 2 417 Commercial construction — — Residential — — Home Equity — — Consumer — — Total 2 $ 417 Loans modified as TDRs during the six month period ended June 30, 2016 are detailed below. Six months ended June 30, 2016 (Dollars in thousands) Number of restructurings Pre-modification outstanding recorded investment Post-modification outstanding recorded investment Commercial real estate 4 $ 5,093 $ 5,059 Commercial and industrial 6 2,058 2,073 Commercial construction — — — Residential mortgages — — — Home equity loans and lines — — — Consumer — — — Total 10 $ 7,151 $ 7,132 For the TDRs entered into during the 2016 period, there were no subsequent charge-offs associated, and there was $169 thousand in specific reserves allocated to these TDRs, as management considered it likely that the unreserved principal will ultimately be collected. Payment defaults, during the six months ended June 30, 2016 , on loans modified as TDRs within the preceding twelve months are detailed below. Six months ended June 30, 2016 (Dollars in thousands) Number of TDRs that defaulted Post- modification outstanding recorded investment Commercial real estate — — Commercial and industrial 2 $ 417 Commercial construction — — Residential mortgages — — Home equity loans and lines — — Consumer — — Total 2 $ 417 Other real estate owned ( " OREO " ) The Company carried no OREO at June 30, 2017 , December 31, 2016 or June 30, 2016 . There were no additions, sales or write downs on OREO during the six months ended June 30, 2017 or 2016 . At June 30, 2017 , the Company had consumer mortgage loans secured by residential real estate properties for which formal foreclosure proceedings were in process according to local requirements of the applicable jurisdictions with carrying amounts totaling $301 thousand compared with $200 thousand at December 31, 2016 . Allowance for loan loss activity The allowance for loan losses is established through a provision for loan losses, a direct charge to earnings. Loan losses are charged against the allowance when management believes that the collectability of the loan principal is unlikely. Recoveries on loans previously charged-off are credited to the allowance. The allowance for loan losses amounted to $32.0 million at June 30, 2017 , compared to $31.3 million at December 31, 2016 , and $30.3 million at June 30, 2016 . For the six months ended June 30, 2017 and June 30, 2016 , the provision for loan losses amounted to $405 thousand and $1.1 million , respectively. The decrease in the provision for the six months ended June 30, 2017 was due primarily to generally improving credit quality metrics and underlying collateral values, partially offset by the higher level of loan growth during the 2017 period, as compared to the 2016 period. The allowance for loan losses to total loans ratio was 1.51% at June 30, 2017 , 1.55% at December 31, 2016 and 1.60% at June 30, 2016 . Based on management's judgment as to the existing credit risks inherent in the loan portfolio, as discussed above under the heading "Credit Quality Indicators," management believes that the Company's allowance for loan losses is adequate to absorb probable losses from specifically known and other probable credit risks associated with the portfolio as of June 30, 2017 . Changes in the allowance for loan losses by portfolio segment for the three months ended June 30, 2017 are presented below: (Dollars in thousands) Cmml Real Estate Cmml and Industrial Cmml Constr Resid. Mortgage Home Equity Consumer Total Beginning Balance at March 31, 2017 $ 15,294 $ 11,178 $ 3,364 $ 978 $ 635 $ 234 $ 31,683 Provision 295 (148 ) 120 11 (14 ) 16 280 Recoveries 56 71 — — 1 2 130 Less: Charge offs — 114 — — — 21 135 Ending Balance at June 30, 2017 $ 15,645 $ 10,987 $ 3,484 $ 989 $ 622 $ 231 $ 31,958 Changes in the allowance for loan losses by portfolio segment for the six months ended June 30, 2017 are presented below: (Dollars in thousands) Cmml Real Estate Cmml and Industrial Cmml Constr Resid. Mortgage Home Equity Consumer Total Beginning Balance at December 31, 2016 $ 14,902 $ 11,204 $ 3,406 $ 960 $ 634 $ 236 $ 31,342 Provision 611 (343 ) 78 29 (14 ) 44 405 Recoveries 132 343 — — 2 5 482 Less: Charge offs — 217 — — — 54 271 Ending Balance at June 30, 2017 $ 15,645 $ 10,987 $ 3,484 $ 989 $ 622 $ 231 $ 31,958 Ending allowance balance: Allocated to loans individually evaluated for impairment $ 393 $ 1,771 $ — $ — $ — $ 13 $ 2,177 Allocated to loans collectively evaluated for impairment $ 15,252 $ 9,216 $ 3,484 $ 989 $ 622 $ 218 $ 29,781 Changes in the allowance for loan losses by portfolio segment for the three months ended June 30, 2016 are presented below: (Dollars in thousands) Cmml Real Estate Cmml and Industrial Cmml Constr Resid. Mortgage Home Equity Consumer Total Beginning Balance at March 31, 2016 $ 13,827 $ 10,278 $ 3,964 $ 1,077 $ 541 $ 223 $ 29,910 Provision 865 (714 ) 92 8 9 7 267 Recoveries 1 480 — — 2 1 484 Less: Charge offs 179 131 — — — 6 316 Ending Balance at June 30, 2016 $ 14,514 $ 9,913 $ 4,056 $ 1,085 $ 552 $ 225 $ 30,345 Changes in the allowance for loan losses by portfolio segment for the six months ended June 30, 2016 are presented below: (Dollars in thousands) Cmml Real Estate Cmml and Industrial Cmml Constr Resid. Mortgage Home Equity Consumer Total Beginning Balance at December 31, 2015 $ 13,514 $ 9,758 $ 3,905 $ 1,061 $ 540 $ 230 $ 29,008 Provision 1,159 (251 ) 156 24 15 14 1,117 Recoveries 20 609 — — 2 3 634 Less: Charge offs 179 203 5 — 5 22 414 Ending Balance at June 30, 2016 $ 14,514 $ 9,913 $ 4,056 $ 1,085 $ 552 $ 225 $ 30,345 Ending allowance balance: Allocated to loans individually evaluated for impairment $ 541 $ 990 $ 550 $ — $ — $ 18 $ 2,099 Allocated to loans collectively evaluated for impairment $ 13,973 $ 8,923 $ 3,506 $ 1,085 $ 552 $ 207 $ 28,246

Deposits

Deposits	6 Months Ended
	Jun. 30, 2017
Deposits [Abstract]
Deposits	Deposits Deposits are summarized as follows: (Dollars in thousands) June 30, 2017 December 31, 2016 Non-interest bearing demand deposits $ 700,415 $ 646,115 Interest bearing checking 406,077 372,696 Savings 199,018 178,637 Money market 793,131 844,216 Certificates of deposit $250,000 or less 128,346 125,580 Certificates of deposit more than $250,000 39,335 42,315 Total customer deposits 2,266,322 2,209,559 Brokered deposits (1) 87,460 59,362 Total deposits $ 2,353,782 $ 2,268,921 ___________________________________ (1) Primarily brokered CDs $250,000 and under Total customer deposits (deposits excluding brokered deposits) include reciprocal money market deposits and CDs received from participating banks in nationwide deposit networks as a result of our customers electing to participate in Company offered programs which allow for full FDIC insurance. Essentially, the equivalent of the customers' original deposited funds comes back to the Company as customer deposits within the appropriate category under total deposits on the consolidated balance sheet. The Company's customers' balances in these reciprocal products were $252.4 million and $281.6 million at June 30, 2017 and December 31, 2016 , respectively. See Note 12, "Fair Value Measurements," below for further information regarding the Company's fair value measurements for deposits.

Borrowed Funds and Subordinated

Borrowed Funds and Subordinated Debt	6 Months Ended
	Jun. 30, 2017
Debt Disclosure [Abstract]
Borrowed Funds and Subordinated Debt	Borrowed Funds and Subordinated Debt Borrowed funds, consisting of FHLB borrowings, amounted to $44.3 million at June 30, 2017 , compared to $10.7 million at December 31, 2016 . The Company also carried subordinated debt of $14.8 million (net of deferred issuance costs) at both June 30, 2017 and December 31, 2016 , which consisted of $15.0 million in aggregate principal amount of Fixed-to-Floating Rate Subordinated Notes (the "Notes"), issued in January 2015 , with a 15 year term. The Notes are intended to qualify as Tier 2 capital for regulatory purposes, and pay interest at a fixed rate of 6.00% per annum through January 30, 2025 . Refer to Note 7, "Borrowed Funds and Subordinated Debt," to the Company's consolidated financial statements contained in the 2016 Annual Report on Form 10-K for additional information about the Company's subordinated debt. See Note 12, "Fair Value Measurements," below for further information regarding the Company's fair value measurements for borrowed funds and subordinated debt.

Derivatives and Hedging Activit

Derivatives and Hedging Activities	6 Months Ended
	Jun. 30, 2017
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Derivatives and Hedging Activities	Derivatives and Hedging Activities Interest rate lock commitments related to the origination of mortgage loans that will be sold are considered derivative instruments. The commitments to sell loans are also considered derivative instruments. The Company generally does not pool mortgage loans for sale, but instead, sells the loans on an individual basis. To reduce the net interest rate exposure arising from its loan sale activity, the Company enters into the commitment to sell these loans at essentially the same time that the interest rate lock commitment is quoted on the origination of the loan. The Company estimates the fair value of these derivatives based on current secondary mortgage market prices. At June 30, 2017 and December 31, 2016 , the estimated fair values of these derivative instruments were considered to be immaterial. The Company may use interest-rate contract swaps as part of its interest-rate risk management strategy. Interest-rate swap agreements are entered into as hedges against future interest-rate fluctuations on specifically identified assets or liabilities. The Company did not have derivative fair value hedges or derivative cash flow hedges at either June 30, 2017 or December 31, 2016 . The Company also has a “Back-to-Back Swap” program whereby the Bank enters into an interest rate swap with a qualified commercial banking customer and simultaneously enters into an equal and opposite interest rate swap with a counterparty. The customer interest rate swap agreement allows commercial banking customers to convert a floating-rate loan payment to fixed-rate payment. The transaction structure effectively minimizes the Bank’s net risk exposure resulting from such transactions. Customer-related credit risk is minimized by the cross collateralization of the loan and the interest rate swap agreement. Back-to-Back Swaps are not speculative but rather, result from a service the Company provides to certain customers. Back-to-Back Swaps do not meet hedge accounting requirements and therefore changes in the fair value of both the customer swaps and the counterparty swaps, which have an offsetting relationship, are recognized directly in earnings. As a result of this offsetting relationship, there were no net gains or losses recognized in income on Back-to-Back Swaps during the six months ended June 30, 2017 or June 30, 2016 . The Company had six interest-rate swaps at June 30, 2017 with an aggregate notional amount of $29.8 million compared to four interest-rate swaps with an aggregate notional amount of $26.7 million at December 31, 2016 . Asset derivatives and liability derivatives are included in prepaid expenses and other assets and accrued expenses and other liabilities on the consolidated balance sheets, respectively. The table below presents the fair value and classification of the Company’s derivative financial instruments for the periods presented: As of June 30, 2017 As of December 31, 2016 (Dollars in thousands) Asset Derivatives Liability Derivatives Asset Derivatives Liability Derivatives Back-to-Back Swaps $ 459 $ 459 $ 610 $ 610 By using derivative financial instruments, the Company exposes itself to counterparty credit risk. Credit risk is the risk of failure by the counterparty to perform under the terms of the derivative contract. When the fair value of a derivative contract is positive, the counterparty owes the Company, which creates credit risk for the Company. When the fair value of a derivative is negative, the Company owes the counterparty and, therefore, it does not possess credit risk. The credit risk in derivative instruments is mitigated by entering into transactions with highly-rated counterparties that management believes to be creditworthy. As the swaps are subject to master netting agreements, the Company had reduced exposure relating to interest rate swaps with institutional counterparties at June 30, 2017 . The Company had unsecured counterparty credit risk exposure of $459 thousand and $610 thousand on interest rate swaps at June 30, 2017 and December 31, 2016 , respectively. The counterparty was rated A / A2 by S&P and Moody’s, respectively, at June 30, 2017 . Certain counterparty interest rate swaps contain provisions that require the Company to post collateral if the derivative exposure exceeds a threshold amount. See the table below for amounts held at each period presented. The table below also presents the Company's asset and liability derivative positions and the potential effect of netting arrangements on its financial position, as of the periods presented. June 30, 2017 Gross Amounts of Recognized Asset/Liabilities Gross Amounts Offset in the Statement of Financial Position Net Amounts of Assets Presented in the Statement of Financial Position Gross amounts not offset in the Statement of Financial Position (Dollars in thousands) Financial Instruments Cash collateral (Received)/Posted Net Amount Asset Derivatives Back-to-Back Swaps $ 459 $ — $ 459 $ — $ — $ 459 Liability Derivatives Back-to-Back Swaps $ 459 $ — $ 459 $ — $ — $ 459 December 31, 2016 Gross Amounts of Recognized Asset/Liabilities Gross Amounts Offset in the Statement of Financial Position Net Amounts of Assets Presented in the Statement of Financial Position Gross amounts not offset in the Statement of Financial Position (Dollars in thousands) Financial Instruments Cash collateral (Received)/Posted Net Amount Asset Derivatives Back-to-Back Swaps $ 610 $ — $ 610 $ — $ — $ 610 Liability Derivatives Back-to-Back Swaps $ 610 $ — $ 610 $ — $ — $ 610 The Company has interest rate swaps with counterparties that contain credit-risk-related contingent provisions. These provisions provide the counterparty with the right to terminate its derivative positions and require the Company to settle its obligations under the agreements if the Company defaults on certain of its indebtedness. The Company also participates in loans originated by third party banks, where the originating bank utilizes a back-to-back interest rate swap structure; however, the Company is not a party to the swap agreements. Under the terms of the loan participations, the Company has accepted contingent liabilities that would only be realized if the swaps were terminated early and there were outstanding losses not covered by the underlying borrowers and the borrowers' pledged collateral. If applicable, the Company’s swap loss exposure would be equal to the percentage of the Company’s participation in the underlying loan applied to the originating bank's swap loss. At June 30, 2017 and December 31, 2016 , the Company had two such participation loans and management considers the risk of material swap loss exposure to be unlikely based on the borrower's financial and collateral strength.

Stockholder's Equity

Stockholder's Equity	6 Months Ended
	Jun. 30, 2017
Equity [Abstract]
Stockholders' Equity	Stockholders' Equity Shares authorized and share issuance The Company’s authorized capital is divided into common stock and preferred stock. At the Company's annual meeting on May 2, 2017, shareholders voted to amend the Company’s Restated Articles of Organization to increase the number of shares of common stock that the Company is authorized to issue from 20,000,000 shares to 40,000,000 shares. The Company is authorized to issue 1,000,000 shares of preferred stock. The Company has a shareholders rights plan. Under the plan, each share of common stock includes a right to purchase under certain circumstances one one-hundredth of a share of the Company’s Series A Junior Participating Preferred Stock, par value 0.01 per share, at a purchase price of $52.00 per one one-hundredth of a preferred share, subject to adjustment, or, in certain circumstances, to receive cash, property, shares of common stock or other securities of the Company. The rights are not presently exercisable and remain attached to the shares of common stock until the occurrence of certain triggering events that would ordinarily be associated with an unsolicited acquisition or attempted acquisition of 10% or more of the Company’s outstanding shares of common stock. The rights have no voting or dividend privileges, and unless and until they become exercisable, have no dilutive effect on the earnings of the Company. The rights will expire, unless earlier redeemed, exchanged, or otherwise rescinded by the Company, on January 13, 2018. The Company is currently evaluating the renewal of the plan in anticipation of this expiration date. The Company's stock incentive plans permit the Board of Directors to grant, under various terms, stock options (for the purchase of newly issued shares of common stock), restricted stock, restricted stock units and stock appreciation rights to officers and other employees, directors and consultants. These plans also allow for newly issued shares of common stock to be issued without restrictions to officers and other employees, directors and consultants. The Company issues stock options and restricted stock awards to officers and other employees and restricted stock awards and stock compensation in lieu of cash fees to non-employee directors. The restricted stock awards allow for the non-forfeitable receipt of dividends, and the voting of all shares, whether or not vested, throughout the vesting periods at the same proportional level as common shares outstanding. The unvested restricted stock awards are the Company's only participating securities and are included in shares outstanding. Unvested participating restricted awards amounted to 126,770 shares and 141,580 shares as of June 30, 2017 and December 31, 2016 , respectively. Upon vesting, restricted stock awards may be net share-settled to cover payment for employee tax obligations, resulting in shares of common stock being reacquired by the Company. Chapter 156D of the Massachusetts General Laws, a statute known as the Massachusetts Business Corporation Act, which applies to Massachusetts corporations such as the Company, eliminates the concept of “treasury stock” and provides that shares a Massachusetts company reacquires will be treated as authorized but unissued shares. See Note 10, "Stock-Based Compensation," below for additional information regarding the Company's stock incentive plans. In addition to shares issued to employees, directors and consultants and shares issued through equity offerings (see below), the Company maintains a dividend reinvestment and direct stock purchase plan (“DRSPP”) for stockholders and new investors to reinvest or purchase additional shares of common stock directly from the Company. Capital Raised In the second quarter of 2016, the Company completed a combined shareholder subscription rights offering and supplemental community offering (the "Offering"), at an offering price of $21.50 per share, under its $40 million shelf registration statement (Reg No. 333-190017). The Company issued 930,232 shares of common stock and received gross proceeds of $20.0 million ( $19.7 million , net of offering costs) in the Offering. The Company contributed the net proceeds to the Bank to support future asset growth and for general corporate purposes. See Note 11, "Earnings per Share," below for addition information regarding the impact of common stock and options issued. Comprehensive Income Comprehensive income is defined as all changes to stockholders' equity except investments by and distributions to stockholders. Net income is one component of comprehensive income, with other components referred to in the aggregate as other comprehensive income. The Company's only other comprehensive income component is the net unrealized holding gains or losses on investments available-for-sale, net of deferred income taxes. Pursuant to GAAP, the Company initially excludes these unrealized holding gains and losses from net income; however, they are later reported as reclassifications out of accumulated other comprehensive income into net income when the securities are sold. When securities are sold, the reclassification of realized gains and losses on available-for-sale securities are included on the Consolidated Statements of Income under the "non-interest income" subheading on the line item "net gains on sales of investment securities" and the related income tax expense is included in the line item "provision for income taxes," both of which are also detailed on the Consolidated Statements of Comprehensive Income under the subheading "reclassification adjustment for net gains included in net income." Refer to Note 10, "Stockholders' Equity," to the Company's consolidated financial statements included in the Company's 2016 Annual Report on Form 10-K for additional information relating to capital adequacy requirements, dividends and the DRSPP.

Supplemental Retirement Plan an

Supplemental Retirement Plan and Other Postretirement Benefit Obligations	6 Months Ended
	Jun. 30, 2017
Compensation and Retirement Disclosure [Abstract]
Supplemental Retirement Plan and Other Postretirement Benefit Obligations	Supplemental Retirement Plan and Other Post-retirement Benefit Obligations Supplemental Employee Retirement Plan ("SERP") The Company has salary continuation agreements with two of its current executive officers and one former executive officer. These salary continuation agreements provide for predetermined fixed-cash supplemental retirement benefits to be provided for a period of 20 years after each individual reaches a defined "benefit age." The individuals covered under the SERP have reached the defined benefit age and are receiving payments under the plan. Additionally, the Company has not recognized service costs in the current or prior year as each officer had previously attained their individually defined benefit age and was fully vested under the plan. This non-qualified plan represents a direct liability of the Company, and as such has no specific assets set aside to settle the benefit obligation. The funded status is the aggregate amount accrued, or the "accumulated benefit obligation," which is equal to the present value of the benefits to be provided to the employee or any beneficiary. Because the Company's benefit obligations provide for predetermined fixed-cash payments, the Company does not have any unrecognized costs to be included as a component of accumulated other comprehensive income. Total net periodic benefit costs, comprised of interest costs only, were $29 thousand and $58 thousand for the three and six months ended June 30, 2017 , respectively, compared to $31 thousand and $62 thousand for the three and six months ended June 30, 2016 , respectively. Benefits paid amounted to $69 thousand and $138 thousand for both the three and six months ended June 30, 2017 and June 30, 2016 , respectively. The Company anticipates accruing an additional $58 thousand to the SERP during the remainder of 2017 . Supplemental Life Insurance The Company has provided supplemental life insurance through split-dollar life insurance arrangements for certain executive and senior officers on whom the Bank owns bank-owned life insurance ("BOLI"). These arrangements provide a death benefit to the officer's designated beneficiaries that extend to postretirement periods for some of the supplemental life insurance plans. The Company has recognized a liability for these future postretirement benefits. These non-qualified plans represent a direct liability of the Company, and as such has no specific assets set aside to settle the benefit obligation. The funded status is the aggregate amount accrued, or the "accumulated postretirement benefit obligation," which is the present value of the post-retirement benefits associated with this arrangement. The following table illustrates the net periodic post-retirement benefit cost for the supplemental life insurance plans for the periods indicated: Three months ended June 30, Six months ended June 30, (Dollars in thousands) 2017 2016 2017 2016 Service Cost $ (3 ) $ (3 ) $ (6 ) $ (5 ) Interest Cost 23 21 46 42 Net periodic post-retirement benefit cost $ 20 $ 18 $ 40 $ 37

Stock-Based Compensation

Stock-Based Compensation	6 Months Ended
	Jun. 30, 2017
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]
Stock-Based Compensation	Stock-Based Compensation The Company currently has two individual stock incentive plans: the 2009 plan, as amended in 2015, and the 2016 plan. As of June 30, 2017 , an aggregate of 440,470 shares remain available for future grants under the plans. The Company's stock-based compensation expense related to these plans includes stock options and stock awards to officers and other employees included in salary and benefits expense, and stock awards and stock compensation in lieu of cash fees to non-employee directors both included in other operating expenses. Total stock-based compensation expense was $496 thousand and $820 thousand for the three and six months ended June 30, 2017 , respectively, compared to $462 thousand and $905 thousand for the three and six months ended June 30, 2016 , respectively. Stock Option Awards The Company recognized stock-based compensation expense related to stock option awards of $41 thousand and $103 thousand for the three and six months ended June 30, 2017 , respectively, compared to $63 thousand and $142 thousand for the three and six months ended June 30, 2016 , respectively. The Company utilizes the Black-Scholes option valuation model in order to determine the per share grant date fair value of option grants. The table below provides a summary of the options granted in during the periods indicated: Six Months Ended June 30, 2017 2016 Options granted 15,009 31,047 Term in years 10 10 Weighted average assumptions used in the fair value model: Expected volatility 40 % 42 % Expected dividend yield 2.09 % 3.02 % Expected life in years 7 7 Risk-free interest rate 2.35 % 1.91 % Weighted average market price on date of grants $ 30.46 $ 21.91 Per share weighted average fair value $ 11.34 $ 7.91 Fair value as a percentage of market value at grant date 37 % 36 % Options granted during the first six months of 2017 and 2016 generally vest 50% in year two and 50% in year four, on the anniversary date of the awards. Vested options are only exercisable while the employee remains employed with the Bank and for a limited time thereafter. For all awards, if a grantee’s employment or other service relationship, such as service as a director, is terminated for any reason, then any stock options granted that have not vested as of the time of such termination generally must be forfeited, unless the Compensation Committee or the Board of Directors, as the case may be, waives such forfeiture requirement. Refer to Note 12 "Stock-Based Compensation Plans," in the Company's 2016 Annual Report on Form 10-K for a further description of the assumptions used in the valuation model. Stock Awards Stock-based compensation expense recognized in association with stock awards amounted to $384 thousand and $571 thousand for the three and six months ended June 30, 2017 , respectively, compared to $323 thousand and $617 thousand for the three and six months ended June 30, 2016 , respectively. Restricted stock awards are granted at the market price on the date of the grant. Employee awards generally vest over four years in equal portions beginning on the first anniversary date of the award or are performance based awards that vest upon the Company achieving certain predefined performance objectives. Non-employee director awards generally vest over two years in equal portions beginning on the first anniversary date of the award. The table below provides a summary of restricted stock awards granted during the periods indicated: Six Months Ended June 30, Restricted Stock Awards (no. of underlying shares) 2017 2016 Two Year Vesting 6,944 9,060 Four Year Vesting 16,253 18,298 Performance-Based Vesting 25,623 35,071 Total Restricted Stock Awards 48,820 62,429 Weighted average grant date fair value $ 30.46 $ 21.90 If a grantee's employment or other service relationship, such as service as a director, is terminated for any reason, then any shares of restricted stock granted that have not vested as of the time of such termination generally must be forfeited, unless the Compensation Committee or the Board of Directors, as the case may be, waives such forfeiture requirement. The restricted stock awards allow for the receipt of dividends, and the voting of all shares, whether or not vested, throughout the vesting periods at the same proportional level as common shares outstanding. Upon vesting, restricted stock awards may be net share-settled to cover payment for employee tax obligations, resulting in shares of common stock being reacquired by the Company. Any shares that are returned to the Company prior to vesting or as payment for employee tax obligations upon vesting shall remain available for issuance under such plan, while the plan is still open. Stock in Lieu of Directors' Fees In addition to restricted stock awards discussed above, the non-employee members of the Company's Board of Directors may opt to receive newly issued shares of the Company's common stock in lieu of cash compensation for attendance at Board and Board Committee meetings. Stock-based compensation expense related to these directors' fees amounted to $71 thousand and $146 thousand for the three and six months ended June 30, 2017 , respectively, compared to $76 thousand and $146 thousand for the three and six months ended June 30, 2016 , respectively, and is included in other operating expenses. In January 2017 , non-employee directors were issued 12,992 shares of common stock in lieu of 2016 annual cash fees of $286 thousand at a market value price of $22.04 per share, the market value of the common stock on the opt-in measurement date of January 4, 2016 . In the first quarter of 2017 , the Company adopted ASU 2016-09. For further information regarding the implementation of this update and the financial statement impact, refer to Note 1, "Summary of Significant Accounting Policies," Item (e), "Recent Accounting Pronouncements" above. For further information regarding the Company's stock awards, see Note 8, "Stockholders' Equity," above under the caption "Shares authorized and share issuance."

Earnings Per Share

Earnings Per Share	6 Months Ended
	Jun. 30, 2017
Earnings Per Share [Abstract]
Earnings Per Share	Earnings per share Basic earnings per share are calculated by dividing net income available to common stockholders by the weighted average number of common shares outstanding (including participating securities) during the year. The Company's only participating securities are unvested restricted stock awards that contain non-forfeitable rights to dividends. See Note 8, "Stockholders' Equity," under the caption "Shares authorized and share issuance," below for further information regarding the Company's participating securities. Diluted earnings per share reflects the effect on weighted average shares outstanding of the number of additional shares outstanding if dilutive stock options were converted into common stock using the treasury stock method. The table below presents the increase in average shares outstanding, using the treasury stock method, for the diluted earnings per share calculation for the periods indicated: Three months ended June 30, Six months ended June 30, 2017 2016 2017 2016 Basic weighted average common shares outstanding 11,572,430 10,561,680 11,540,796 10,483,396 Dilutive shares 80,259 68,220 84,916 67,446 Diluted weighted average common shares outstanding 11,652,689 10,629,900 11,625,712 10,550,842 Basic and diluted weighted average common shares outstanding for the three and six months ended June 30, 2017 include the full impact of the 930,232 shares of common stock issued in the Company’s 2016 equity offering, while the respective weighted averages for the 2016 periods were only marginally affected from the issue date of June 23, 2016 through period end. There were 15,009 options outstanding that were determined to be anti-dilutive and therefore excluded from the calculation of dilutive shares for the six months ended June 30, 2017 . These options, which were not dilutive at that date, may potentially dilute earnings per share in the future.

Fair Value Measurements

Fair Value Measurements	6 Months Ended
	Jun. 30, 2017
Fair Value Disclosures [Abstract]
Fair Value Measurements	Fair Value Measurements The FASB defines the fair value of an asset or liability to be the price which a seller would receive in an orderly transaction between market participants (an exit price) and also establishes a fair value hierarchy segregating fair value measurements using three levels of inputs: (Level 1) quoted market prices in active markets for identical assets or liabilities; (Level 2) significant other observable inputs, including quoted prices for similar items in active markets, quoted prices for identical or similar items in markets that are not active, inputs such as interest rates and yield curves, volatilities, prepayment speeds, credit risks and default rates which provide a reasonable basis for fair value determination or inputs derived principally from observed market data; and (Level 3) significant unobservable inputs for situations in which there is little, if any, market activity for the asset or liability. Unobservable inputs must reflect reasonable assumptions that market participants would use in pricing the asset or liability, which are developed on the basis of the best information available under the circumstances. The following tables summarize significant assets and liabilities carried at fair value and placement in the fair value hierarchy at the dates specified: June 30, 2017 Fair Value Measurements using: (Dollars in thousands) Fair Value (level 1) (level 2) (level 3) Assets measured on a recurring basis: Debt securities $ 381,818 $ — $ 381,818 $ — Equity securities 6,187 6,187 — — FHLB stock 4,364 — — 4,364 Interest-rate swaps 459 — 459 — Assets measured on a non-recurring basis: Impaired loans (collateral dependent) 3,919 — — 3,919 Liabilities measured on a recurring basis: Interest-rate swaps 459 — 459 — December 31, Fair Value Measurements using: (Dollars in thousands) Fair Value (level 1) (level 2) (level 3) Assets measured on a recurring basis: Debt securities $ 362,147 $ — $ 362,147 $ — Equity investments 12,643 12,643 — — FHLB stock 2,094 — — 2,094 Interest-rate swaps 610 — 610 — Assets measured on a non-recurring basis: Impaired loans (collateral dependent) 3,481 — — 3,481 Liabilities measured on a recurring basis: Interest-rate swaps 610 — 610 — The Company did not transfer any assets between the fair value measurement levels during the six months ended June 30, 2017 or the year ended December 31, 2016 . All of the Company's debt and equity securities that are considered "available-for-sale" are carried at fair value. The debt security category above includes federal agency obligations, commercial and residential federal agency MBS, municipal securities, corporate bonds and certificates of deposits, as held at those dates. The Company utilizes third-party pricing vendors to provide valuations on its debt securities. Fair values provided by the vendors were generally determined based upon pricing matrices utilizing observable market data inputs for similar or benchmark securities in active markets and/or based on a matrix pricing methodology which employs The Bond Market Association's standard calculations for cash flow and price/yield analysis, live benchmark bond pricing and terms/condition data available from major pricing sources. Therefore, management regards the inputs and methods used by third-party pricing vendors to be "Level 2 inputs and methods" as defined in the "fair value hierarchy." The Company periodically obtains a second price from an impartial third party on debt securities to assess the reasonableness of prices provided by the primary independent pricing vendor. The Company's equity portfolio fair value is measured based on quoted market prices for the shares; therefore, these securities are categorized as Level 1 within the fair value hierarchy. The Bank is required to purchase FHLB stock at par value in association with advances from the FHLB; this stock is classified as a restricted investment and carried at cost which management believes approximates fair value; therefore, these securities are categorized as Level 3 measures. See Note 1, "Summary of Significant Accounting Policies," Item (c) "Restricted Instruments" for further information regarding the Company's fair value assessment of FHLB capital stock. Impaired loan balances in the table above represent those collateral dependent impaired commercial loans where management has estimated the probable credit loss by comparing the loan's carrying value against the expected realizable fair value of the collateral (appraised value, or internal analysis less estimated cost to sell, adjusted as necessary for changes in relevant valuation factors subsequent to the measurement date). Certain inputs used in these assessments, and possible subsequent adjustments, are not always observable, and therefore, collateral dependent impaired loans are categorized as Level 3 within the fair value hierarchy. A specific allowance is assigned to the collateral dependent impaired loan for the amount of management's estimated probable credit loss. The specific allowances assigned to the collateral dependent impaired loans amounted to $1.6 million at June 30, 2017 compared to $1.9 million at December 31, 2016 . The fair values for the interest-rate swap assets and liabilities represent a FASB Level 2 measurement and are based on settlement values adjusted for credit risk and observable market interest rate curves. The settlement values are based on discounted cash flow analysis, a widely accepted valuation technique, reflecting the contractual terms of the derivatives, including the period to maturity, and uses observable market-based inputs, including interest rate curves. Credit risk adjustments consider factors such as the likelihood of default by the Company and its counterparties, its net exposures and remaining contractual life. The change in value of interest-rate swap assets and liabilities attributable to credit risk was not significant during the reported periods. Refer also to Note 7, "Derivatives and Hedging Activities," for additional information on the Company's interest-rate swaps. Standby letters of credit are conditional commitments issued by the Company to guarantee the financial obligation or performance of a customer to a third party. The fair value of these commitments was estimated to be the fees charged to enter into similar agreements, and accordingly these fair value measures are deemed to be FASB Level 2 measurements. In accordance with the FASB, the estimated fair values of these commitments are carried on the balance sheet as a liability and amortized to income over the life of the letters of credit, which are typically one year. The estimated fair value of these commitments carried on the balance sheet at June 30, 2017 and December 31, 2016 were deemed immaterial. Interest rate lock commitments related to the origination of mortgage loans that will be sold are considered derivative instruments. The commitments to sell loans are also considered derivative instruments. The Company generally does not pool mortgage loans for sale, but instead sells the loans on an individual basis. To reduce the net interest rate exposure arising from its loan sale activity, the Company enters into the commitment to sell these loans at essentially the same time that the interest rate lock commitment is quoted on the origination of the loan. The Company estimates the fair value of these derivatives based on current secondary mortgage market prices. These commitments are accounted for in accordance with FASB guidance. The fair values of the Company's derivative instruments are deemed to be FASB Level 2 measurements. At June 30, 2017 and December 31, 2016 , the estimated fair value of the Company's interest-rate lock commitments and commitments to sell these mortgages loans were deemed immaterial. The following table presents additional quantitative information about assets measured at fair value on a recurring and non-recurring basis for which the Company utilized Level 3 inputs (significant unobservable inputs for situations in which there is little, if any, market activity for the asset or liability) to determine fair value as of June 30, 2017 : (Dollars in thousands) Fair Value Valuation Technique Unobservable Input Unobservable Input Value or Range Assets measured on a recurring basis: FHLB stock $ 4,364 FHLB Stated Par Value N/A N/A Assets measured on a non-recurring basis: Impaired loans (collateral dependent) $ 3,919 Appraisal of collateral Appraisal adjustments (1) 5% - 50% (1) Appraisals may be adjusted by management for qualitative factors such as economic conditions and estimated liquidation expenses. Estimated Fair Values of Assets and Liabilities In addition to disclosures regarding the measurement of assets and liabilities carried at fair value on the consolidated balance sheet, the Company is also required to disclose fair value information about financial instruments for which it is practicable to estimate that value, whether or not recognized on the balance sheet. The carrying values, estimated fair values and placement in the fair value hierarchy of the Company's financial instruments for which fair value is only disclosed but not recognized on the balance sheet at the dates indicated are summarized as follows: June 30, 2017 Fair value measurement (Dollars in thousands) Carrying Amount Fair Value Level 1 inputs Level 2 Inputs Level 3 Inputs Financial assets: Loans held for sale $ 856 $ 857 $ — $ 857 $ — Loans, net 2,082,442 2,089,802 — — 2,089,802 Financial liabilities: Certificates of deposit (including brokered) 255,141 254,349 — 254,349 — Borrowed funds 44,255 44,249 — 44,249 — Subordinated debt 14,841 14,246 — — 14,246 December 31, 2016 Fair value measurement (Dollars in thousands) Carrying Amount Fair Value Level 1 inputs Level 2 Inputs Level 3 Inputs Financial assets: Loans held for sale $ 1,569 $ 1,569 $ — $ 1,569 $ — Loans, net 1,991,387 1,997,887 — — 1,997,887 Financial liabilities: Certificates of deposit (including brokered) 227,257 226,536 — 226,536 — Borrowed funds 10,671 10,670 — 10,670 — Subordinated debt 14,834 14,011 — — 14,011 Excluded from the tables above are certain financial instruments with carrying values that approximated their fair value at the dates indicated, as they were short-term in nature or payable on demand. These include cash and cash equivalents, and non-term deposit accounts. The respective carrying values of these instruments would all be considered to be classified within Level 1 of their fair value hierarchy. Also excluded from these tables are the fair values of commitments for the unused portion of lines of credit and letters of credit, which were estimated to be the fees currently charged to enter into similar agreements and are deemed to be immaterial, as well as commitments to originate loans which were short-term, at current market rates and estimated to have no significant change in fair value. When determining fair values noted in the tables above, in cases where quoted fair values are not available, fair values are based upon estimates using various valuation techniques. Those techniques are significantly affected by the assumptions used, including the discount rate and estimates of future cash flows. The following methods and assumptions were used by the Company in estimating fair values of its financial instruments: Loans held for sale: Loans held for sale are recorded at the lower of aggregate amortized cost or market value. The fair value is based on comparable market prices for loans with similar rates and terms. Loans: The fair value of loans was determined using discounted cash flow analysis, using interest rates currently being offered by the Company. The incremental credit risk for adversely classified loans was considered in the determination of the fair value of the loans. This method of estimating fair value does not incorporate the exit price concept of fair value. Financial liabilities: The fair values of certificates of deposit and borrowings were estimated using discounted cash flow analysis using rates offered by the Bank or advance rates offered by the FHLB on June 30, 2017 and December 31, 2016 for similar instruments. The fair value of subordinated debt was estimated using discounted cash flow analysis using a market rate of interest at June 30, 2017 and December 31, 2016 . Limitations: The estimates of fair value of financial instruments were based on information available at June 30, 2017 and December 31, 2016 and are not indicative of the fair market value of those instruments as of the date of this Quarterly Report on Form 10-Q. These estimates do not reflect any premium or discount that could result from offering for sale at one time the Company's entire holdings of a particular financial instrument. The fair value of the Company's time deposit liabilities do not take into consideration the value of the Company's long-term relationships with depositors, which may have significant value. Because no active market exists for a portion of the Company's financial instruments, fair value estimates were based on judgments regarding future expected loss experience, current economic conditions, risk characteristics of various financial instruments, and other factors. These estimates are subjective in nature and involve uncertainties and matters of significant judgment and therefore cannot be determined with precision. Changes in assumptions could significantly affect the estimates. Fair value estimates were based on existing on and off-balance sheet financial instruments without an attempt to estimate the value of anticipated future business and the value of assets and liabilities that are not considered financial instruments, including premises and equipment and foreclosed real estate, if any. In addition, the tax ramifications related to the realization of the unrealized appreciation and depreciation can have a significant effect on fair value estimates and have not been considered in any of the estimates. Accordingly, the aggregate fair value amounts presented do not represent the underlying value of the Company.

Summary of Significant Accoun21

Summary of Significant Accounting Policies (Policies)	6 Months Ended
	Jun. 30, 2017
Accounting Policies [Abstract]
Principles of Consolidation	The accompanying unaudited consolidated interim financial statements and these notes should be read in conjunction with the December 31, 2016 audited consolidated financial statements and notes thereto contained in the 2016 Annual Report on Form 10-K of Enterprise Bancorp, Inc. (the "Company," "Enterprise," "we," or "our"), a Massachusetts corporation, as filed with the Securities and Exchange Commission (the "SEC") on March 14, 2017 (the " 2016 Annual Report on Form 10-K"). The Company has not changed its accounting policies from those disclosed in its 2016 Annual Report on Form 10-K. The Company's unaudited consolidated interim financial statements include the accounts of the Company and its wholly owned subsidiary, Enterprise Bank and Trust Company (the "Bank"). The Bank is a Massachusetts trust company organized in 1989. Substantially all of the Company's operations are conducted through the Bank and its subsidiaries. The Bank's subsidiaries include Enterprise Insurance Services, LLC and Enterprise Investment Services, LLC, organized under the laws of the State of Delaware for the purposes of engaging in insurance sales activities and offering non-deposit investment products and services, respectively. In addition, the Bank has the following subsidiaries that are incorporated in the Commonwealth of Massachusetts and classified as security corporations in accordance with applicable Massachusetts General Laws: Enterprise Security Corporation; Enterprise Security Corporation II; and Enterprise Security Corporation III. The security corporations, which hold various types of qualifying securities, are limited to conducting securities investment activities that the Bank itself would be allowed to conduct under applicable laws. At June 30, 2017 , the Company had 23 full service branches serving the Greater Merrimack Valley and North Central regions of Massachusetts and Southern New Hampshire (Southern Hillsborough and Rockingham counties). In July 2017, the Company opened its 24 th branch, located in Windham, New Hampshire. Through the Bank and its subsidiaries, the Company offers a range of commercial, residential and consumer loan products, deposit products and cash management services, as well as investment advisory and wealth management, trust and insurance services. The services offered through the Bank and its subsidiaries are managed as one strategic unit and represent the Company's only reportable operating segment. The Federal Deposit Insurance Corporation (the "FDIC") and the Massachusetts Division of Banks (the "Division") have regulatory authority over the Bank. The Bank is also subject to certain regulatory requirements of the Board of Governors of the Federal Reserve System (the "Federal Reserve Board") and, with respect to its New Hampshire branch operations, the New Hampshire Banking Department. The business and operations of the Company are subject to the regulatory oversight of the Federal Reserve Board. The Division also retains supervisory jurisdiction over the Company.
Basis of Accounting	The accompanying unaudited consolidated interim financial statements have been prepared in accordance with U.S. generally accepted accounting principles ("GAAP") for interim financial information and the instructions for Form 10-Q through the rules and interpretive releases of the SEC under federal securities law. In the opinion of management, the accompanying unaudited consolidated interim financial statements reflect all necessary adjustments consisting of normal recurring accruals for a fair presentation. All significant intercompany balances and transactions have been eliminated in the accompanying unaudited consolidated interim financial statements. Interim results are not necessarily indicative of results to be expected for the entire year, or any future period.
Reclassifications	Certain previous years' amounts in the consolidated financial statements, and notes thereto, have been reclassified to conform to the current year's presentation.
Subsequent events	The Company has evaluated subsequent events and transactions from June 30, 2017 through the date of this Quarterly report on Form 10-Q was filed with the SEC for potential recognition or disclosure as required by GAAP and determined that there were no material subsequent events requiring recognition or disclosure.
Critical Accounting Estimates	Critical Accounting Estimates In preparing the unaudited consolidated interim financial statements in conformity with GAAP, management is required to exercise judgment in determining many of the methodologies, assumptions and estimates to be utilized. These assumptions and estimates affect the reported values of assets and liabilities as of the balance sheet date and income and expenses for the period then ended. As future events and their effects cannot be determined with precision, actual results could differ significantly from these estimates should the assumptions and estimates used change over time due to changes in circumstances. Changes in those estimates resulting from continuing change in the economic environment and other factors will be reflected in the financial statements and results of operations in future periods. As discussed in the Company's 2016 Annual Report on Form 10-K, the three most significant areas in which management applies critical assumptions and estimates are the estimates of the allowance for loan losses, impairment review of investment securities and the impairment review of goodwill. Refer to Note 1, "Summary of Significant Accounting Policies," to the Company's consolidated financial statements included in the Company's 2016 Annual Report on Form 10-K for accounting policies related to these significant estimates. The Company has not changed its significant accounting policies from those disclosed in its 2016 Annual Report on Form 10-K.
Restricted Instruments	Restricted Instruments Certain of the Company's derivative agreements contain provisions that require the Company to post collateral if the derivative exposure exceeds a threshold amount. When the Company has pledged cash as collateral for this purpose, the cash is carried as restricted cash within cash and cash equivalents. As a member of the Federal Home Loan Bank of Boston ("FHLB"), the Company is required to purchase certain levels of FHLB capital stock at par value in association with outstanding advances from the FHLB. From time-to-time, the FHLB may initiate the repurchase, at par value, of "excess" levels of its capital stock held by member banks. This stock is classified as a restricted investment and carried at cost, which management believes approximates fair value. FHLB stock represents the only restricted investment held by the Company. Management regularly reviews its holdings of FHLB stock for other-than-temporary-impairment ("OTTI"). Based on management's periodic review, the Company has not recorded any OTTI charges on this investment to date. If it was determined that a write-down of FHLB stock was required, impairment would be recognized through a charge to earnings. See Note 2, "Investment Securities," for additional information on management's OTTI review.
Income Taxes	Income Taxes The Company uses the asset and liability method of accounting for income taxes. Under this method, deferred tax assets and liabilities are recognized for the future tax expense or benefit attributable to differences between the financial statement carrying amounts and the tax basis of assets and liabilities. The deferred tax assets and liabilities are reflected at currently enacted income tax rates applicable to the period in which the deferred tax assets or liabilities are expected to be realized or settled. As changes in tax laws or rates are enacted, deferred tax assets and liabilities will be adjusted accordingly through the provision for income taxes. The Company's policy is to classify interest resulting from underpayment of income taxes as income tax expense in the first period the interest would begin accruing according to the provisions of the relevant tax law. The Company classifies penalties resulting from underpayment of income taxes as income tax expense in the period for which the Company claims or expects to claim an uncertain tax position or in the period in which the Company's judgment changes regarding an uncertain tax position. The income tax provisions will differ from the expense that would result from applying the federal statutory rate to income before taxes, due primarily to the impact of tax-exempt interest from certain investment securities, loans and bank-owned life insurance. The Company did not have any unrecognized tax benefits accrued as income tax liabilities or receivables or as deferred tax items at June 30, 2017 . The Company is subject to U.S. federal and state income tax examinations by taxing authorities for the 2013 through 2016 tax years.
Recent Accounting Pronouncements	Recent Accounting Pronouncements Accounting pronouncements adopted by the Company In March 2016, the Financial Accounting Standards Board (the "FASB") issued Accounting Standards Update ("ASU" or "Update") No. 2016-09, "Compensation - Stock Compensation (Topic 718): Improvement to Employee Share-Based Payment Accounting." The new standard was effective for fiscal years beginning after December 15, 2016, including interim periods within those fiscal years. The Company adopted ASU No. 2016-09 in the first quarter of 2017. Several aspects of the accounting are simplified including, generally: a) income tax consequences; b) classification of awards as either equity or liabilities; c) accounting for forfeitures; and d) classification on the statement of cash flows. Upon adoption, the most significant impact of this amendment resulted from the prospective application of current excess tax benefits and deficiencies being recognized in income tax expense, which would previously have been recognized in additional paid-in capital, in the reporting period in which they occur. For the six months ended June 30, 2017 , this reduced the Company's provision for income taxes, increasing earnings by approximately $788 thousand . For the year ended December 31, 2016, the Company recognized $789 thousand in additional paid-in-capital in this regard, which, if under the new ASU, would have been recognized as income tax benefit in the income statement. This amount, treated as discrete items in the period in which they occur, will vary from year to year as a function of the volume of share-based payments vested or exercised and the then current market price of the Company's stock in comparison to the compensation cost recognized in the financial statements. Additionally upon adoption, the Company made a policy election to record forfeitures as they occur rather than make use of an estimate. Using a modified retrospective approach, the Company recorded an immaterial cumulative effect adjustment from retained earnings to additional paid-in-capital. The other provisions did not have a material impact on the Company's financial statements upon adoption. Accounting pronouncements not yet adopted by the Company (in order of effective date of implementation) In May 2014, the FASB issued ASU No. 2014-09, "Revenue from Contracts with Customers (Topic 606)." This ASU is intended to create a single source of revenue guidance which is more principles based than current revenue guidance. The guidance affects any entity that either enters into contracts with customers to transfer goods or services, or enters into contracts for the transfer of non-financial assets, unless those contracts are within the scope of other standards. In August 2015, the FASB issued ASU 2015-14, "Revenue from Contracts with Customers (Topic 606): Deferral of the Effective Date" to amend the effective date of ASU 2014-09. The amendments in ASU 2014-09 are effective for annual and interim periods within fiscal years beginning after December 15, 2017. Earlier adoption is permitted only as of annual reporting periods beginning after December 15, 2016, including interim reporting periods within that reporting period. The FASB has since issued additional related ASUs amendments intended to clarify certain aspects and improve understanding of the implementation guidance of Topic 606 but do not change the core principles of the guidance in Topic 606. The effective date and transition requirements for the amendments are the same as the effective date and transition requirements of Topic 606. The Company is currently evaluating the potential impact of the ASU and its amendments on the Company's financial statements, results of operations, and disclosures and does not currently plan to early adopt. Based on the Company's preliminary evaluations to date, and because the largest portion of the Company's revenue, interest income and various loan fees, are specifically excluded from the scope of this ASU, and because the Company currently recognizes the majority of the remaining revenue sources in a manner that management believes is consistent with the new ASU, management believes that revenue recognized under the new standard will generally approximate revenue recognized under current GAAP. The foregoing observations are subject to change as management completes their evaluation. In January 2016, the FASB issued ASU No. 2016-01, "Financial Instruments - Overall (Subtopic 825-10): Recognition and Measurement of Financial Assets and Financial Liabilities," which updates certain aspects of recognition, measurement, presentation and disclosure of financial instruments. Among other things, the new guidance: • Requires equity investments (except those accounted for under the equity method of accounting, or those that result in consolidation of the investee) to be measured at fair value with changes in fair value recognized in net income; • Requires public business entities to use the exit price notion when measuring the fair value of financial instruments for disclosure purposes; and • Requires separate presentation of financial assets and financial liabilities by measurement category and form of financial asset (i.e., securities or loans and receivables) on the balance sheet or the accompanying notes to the financial statements. The new guidance is effective for public companies for fiscal years beginning after December 15, 2017, including interim periods within those fiscal years. The Company is currently evaluating the effects of this ASU on the Company's financial statements, results of operations and disclosures. Based on the Company's evaluation to date, management believes the more significant implications upon adoption of this ASU will be the potential recognition of changes in fair value of the Company's equity portfolio in net income. Under current GAAP, net unrealized appreciation or depreciation on the equity portfolio, net of applicable income taxes, are reflected as a component of accumulated other comprehensive income. The net unrealized gain or loss on equity securities will fluctuate based on changes in the market value of the mutual funds and individual securities held in the portfolio. For the six months ended June 30, 2017 , other comprehensive income, net of taxes, generated from the equity portfolio amounted to $47 thousand , compared to other comprehensive loss of $28 thousand generated for the six months ended June 30, 2016 . Any potential future changes in fair value of the equity portfolio will depend on the amount of dollars invested in the portfolio and the potential magnitude of changes in equity market values. The foregoing observations are subject to change as management completes their evaluation. In August 2016, the FASB issued ASU No. 2016-15, "Statement of Cash flows (Topic 230) - Classification of Certain Cash Receipts and Cash Payments." The amendments are intended to reduce diversity in practice related to the presentation of eight specific cash flow issues. For public business entities that are SEC filers, such as the Company, the amendments in this Update are effective for fiscal years beginning after December 15, 2017, including interim periods within those fiscal years. Because this amendment primarily impacts the presentation and classification of information, the Company does not expect this ASU to have an impact on the Company's financial statements and results of operations. In November 2016, the FASB issued ASU No. 2016-18, "Statement of Cash flows-Restricted Cash (Topic 230)." The amendments in this Update clarify the inclusion of restricted cash in the cash and cash equivalents beginning-of-period and end-of period reconciliation on the statement of cash flows. For public business entities that are SEC filers, such as the Company, the amendments in this Update are effective for fiscal years beginning after December 15, 2017, including interim periods within those fiscal years. Because this amendment primarily impacts the presentation and classification of information, the Company does not expect this ASU to have an impact on the Company's financial statements and results of operations. In March 2017, the FASB issued ASU No. 2017-07, "Compensation-Retirement Benefits (Topic 715): Improving the Presentation of Net Periodic Pension Cost and Net Periodic Postretirement Benefit Cost." The amendments in this Update outline the presentation, classification and disclosure requirements for service cost and other components of net benefit costs. For public business entities that are SEC filers, such as the Company, the amendments in this Update are effective for fiscal years beginning after December 15, 2017, including interim periods within those fiscal years. Early adoption is permitted. Because this amendment primarily impacts the presentation and classification of information, the Company does not expect this ASU to have an impact on the Company's financial statements and results of operations. In May 2017, the FASB issued ASU No. 2017-09, "Compensation - Stock Compensation (Topic 718): Scope of Modification Accounting." The amendments in this Update apply to entities that change the terms of an outstanding share-based payment award. The amendments are intended to reduce diversity in practice as well as cost and complexity when applying guidance in Topic 718 to the modification of the terms and conditions of a share-based payment award. This ASU provides guidance on the three modifications to share-based payment awards and conditions that must be met in order to exempt an entity from modification accounting under topic 718. The amendments in this Update apply prospectively to award modifications on or after the adoption date, and are effective for fiscal years beginning after December 15, 2017, including interim periods within those fiscal years. The Company currently does not expect that adoption of the ASU will have a material impact on its financial statements, results of operations or disclosures. In February 2016, the FASB issued ASU No. 2016-02, "Leases (Topic 842)," which supersedes previous leasing guidance in Topic 840, Leases. Under the new guidance, lessees are required to recognize lease assets and lease liabilities on the balance sheet for all leases with terms longer than 12 months. Leases will be classified as either finance or operating, with classification affecting the pattern of expense recognition in the income statement. The new standard is effective for fiscal years beginning after December 15, 2018, including interim periods within those fiscal years. A modified retrospective transition approach is required for lessees for capital and operating leases existing at, or entered into after, the beginning of the earliest comparative period presented in the financial statements, with certain practical expedients available. The Company is currently evaluating the effects of this ASU on the Company's financial statements, results of operations and disclosures. Based on the Company's evaluation to date, management believes the more significant implication of this ASU on the Company relates to operating leases of our facilities, mainly branch leases. As of June 30, 2017 , the Company had leases on 17 of its locations, including branches and part of its main campus, and expects that upon adoption of this ASU the balance sheet will reflect both lease liabilities, equal to the present value of lease payments, and right-of-use assets, equal to the lease liability plus payments made to lessors adjusted for prepaid or accrued rent and any initial direct cost incurred. In addition, the Company will recognize lease expense in the income statement on a straight-line basis similar to current operating leases. The straight-line expense will reflect the interest expense on the lease liability (effective interest method) and amortization of the right-of-use asset. Lease expense will be presented as a single line item in the operating expense section of the income statement. Management believes that lease expense under the new standard will generally approximate lease expense under current GAAP. The foregoing observations are subject to change as management completes their evaluation. In March 2017, the FASB issued ASU No. 2017-08, "Receivables-Nonrefundable Fees and Other Costs (Subtopic 310-20): Premium Amortization on Purchased Callable Debt Securities." The amendments shorten the amortization period to the earliest call date for certain callable debt securities held at a premium. The accretion for securities held at a discount is not affected by this statement and remains unchanged. The new standard is effective for fiscal years beginning after December 15, 2018, including interim periods within those fiscal years. A modified retrospective basis is required upon adoption. Early adoption is permitted. The Company has assessed the impact of this ASU and does not expect that it will have a material impact on the Company's financial statements, results of operations and disclosures upon adoption. In June 2016, the FASB issued ASU No. 2016-13, "Financial Instruments - Credit Losses (Topic 326): Measurement of Credit Losses on Financial Instruments." The amendments in this ASU require a financial asset (or a group of financial assets) measured at amortized cost basis to be presented at the net amount expected to be collected. Previously, when credit losses were measured under GAAP, an entity generally only considered past events and current conditions in measuring the incurred loss and generally recognition of the full amount of credit losses was delayed until the loss was probable of occurring. The amendments in this ASU eliminate the probable initial recognition threshold in current GAAP and, instead, reflect an entity’s current estimate of all expected credit losses. The measurement of expected credit losses is based on relevant information about past events, including historical experience, current conditions, and reasonable and supportable forecasts that affect the collectability of the reported amount. An entity must use judgment in determining the relevant information and estimation methods that are appropriate in its circumstances. The income statement reflects the measurement of credit losses for newly recognized financial assets, as well as the expected increases or decreases of expected credit losses that have taken place during the period. The allowance for credit losses is a valuation account that is deducted from the amortized cost basis of the financial asset(s) to present the net carrying value at the amount expected to be collected on the financial asset. Credit losses on available-for-sale debt securities should be measured in a manner similar to current GAAP. However, the amendments in this Update require that credit losses be presented as an allowance rather than as a write-down. Unlike current GAAP, the ASU provides for reversals of credit losses in future period net income in situations where the estimate of loss declines. An entity will apply the amendments in this Update through a cumulative-effect adjustment to retained earnings as of the beginning of the first reporting period in which the guidance is effective (that is, a modified-retrospective approach). For public business entities that are SEC filers, such as the Company, the amendments in this Update are effective for fiscal years beginning after December 15, 2019, including interim periods within those fiscal years. Early adoption for fiscal years beginning after December 15, 2018 is permitted. The Company has established an implementation committee and an enterprise-wide implementation plan for this ASU, which will consider the impact to operations, financial results, disclosures and controls. At present, the impact of the adoption of ASU No. 2016-13 on the Company's operations, financial results, disclosures, and controls is unknown. In January 2017, the FASB issued ASU No. 2017-04, "Intangibles-Goodwill and Other (Topic 350)-Simplifying the Test for Goodwill Impairment." The main provision in this ASU eliminated Step 2 of the goodwill impairment test and instead requires an entity to perform its annual, or interim, goodwill impairment test by comparing the fair value of the reporting unit with its carrying amount. An impairment charge would be recognized for the amount the carrying value exceeds the reporting unit's fair value as long as the amount recognized doesn't exceed the amount of goodwill allocated to the reporting unit. For public business entities that are SEC filers, such as the Company, the amendments in this Update are effective for fiscal years beginning after December 15, 2019, including interim periods within those fiscal years. Early adoption is permitted for impairment tests performed on testing dates after January 1, 2017. Goodwill carried on the Company’s consolidated financial statements was $5.7 million at both June 30, 2017 and December 31, 2016 . This asset is related to the Company’s acquisition of two branch offices in July 2000. The Company does not expect the adoption of ASU No. 2017-01 to have a material impact on the Company's financial statements and results of operations.

Stockholder's Equity (Policies)

Stockholder's Equity (Policies)	6 Months Ended
	Jun. 30, 2017
Equity [Abstract]
Comprehensive Income	Comprehensive income is defined as all changes to stockholders' equity except investments by and distributions to stockholders. Net income is one component of comprehensive income, with other components referred to in the aggregate as other comprehensive income. The Company's only other comprehensive income component is the net unrealized holding gains or losses on investments available-for-sale, net of deferred income taxes. Pursuant to GAAP, the Company initially excludes these unrealized holding gains and losses from net income; however, they are later reported as reclassifications out of accumulated other comprehensive income into net income when the securities are sold. When securities are sold, the reclassification of realized gains and losses on available-for-sale securities are included on the Consolidated Statements of Income under the "non-interest income" subheading on the line item "net gains on sales of investment securities" and the related income tax expense is included in the line item "provision for income taxes," both of which are also detailed on the Consolidated Statements of Comprehensive Income under the subheading "reclassification adjustment for net gains included in net income."

Investment Securities (Tables)

Investment Securities (Tables)	6 Months Ended
	Jun. 30, 2017
Investments, Debt and Equity Securities [Abstract]
Schedule of Investment Securities Reconciliation	The amortized cost and carrying values of investment securities at the dates specified are summarized as follows: June 30, 2017 (Dollars in thousands) Amortized cost Unrealized gains Unrealized losses Fair Value Federal agency obligations (1) $ 74,736 $ 492 $ 39 $ 75,189 Residential federal agency MBS (1) 96,307 339 932 95,714 Commercial federal agency MBS (1) 76,800 380 743 76,437 Municipal securities 119,598 2,866 306 122,158 Corporate bonds 11,269 129 31 11,367 Certificates of deposits (2) 950 3 — 953 Total debt securities 379,660 4,209 2,051 381,818 Equity investments 3,884 2,311 8 6,187 Total investment securities, at fair value $ 383,544 $ 6,520 $ 2,059 $ 388,005 December 31, 2016 (Dollars in thousands) Amortized cost Unrealized gains Unrealized losses Fair Value Federal agency obligations (1) $ 74,682 $ 432 $ 45 $ 75,069 Residential federal agency MBS (1) 94,818 96 1,561 93,353 Commercial federal agency MBS (1) 71,993 15 1,730 70,278 Municipal securities 112,401 922 1,520 111,803 Corporate bonds 10,734 51 90 10,695 Certificates of deposits (2) 950 — 1 949 Total debt securities 365,578 1,516 4,947 362,147 Equity investments 10,413 2,532 302 12,643 Total investment securities, at fair value $ 375,991 $ 4,048 $ 5,249 $ 374,790 __________________________________________ (1) These categories may include investments issued or guaranteed by government sponsored enterprises such as Fannie Mae ("FNMA"), Freddie Mac ("FHLMC"), Federal Farm Credit Bank ("FFCB"), or one of several Federal Home Loan Banks, as well as, investments guaranteed by Ginnie Mae ("GNMA"), a wholly-owned government entity. (2) Certificates of deposits ("CDs") represent term deposits issued by banks that are subject to FDIC insurance and purchased on the open market.
Schedule of Unrealized Loss on Investments	The following tables summarize investments (debt and equity) having temporary impairment, due to the fair market values having declined below the amortized costs of the individual investments, and the period that the investments have been temporarily impaired at June 30, 2017 and December 31, 2016 . June 30, 2017 Less than 12 months 12 months or longer Total (Dollars in thousands) Fair Value Unrealized Losses Fair Value Unrealized Losses Fair Value Unrealized Losses # of holdings Federal agency obligations $ 18,006 $ 39 $ — $ — $ 18,006 $ 39 5 Residential federal agency MBS 42,216 573 11,990 359 54,206 932 23 Commercial federal agency MBS 38,490 743 — — 38,490 743 11 Municipal securities 19,527 266 1,045 40 20,572 306 29 Corporate bonds 2,713 27 425 4 3,138 31 19 Certificates of deposit — — — — — — — Equity investments 215 8 — — 215 8 4 Total temporarily impaired investment securities $ 121,167 $ 1,656 $ 13,460 $ 403 $ 134,627 $ 2,059 91 December 31, 2016 Less than 12 months 12 months or longer Total (Dollars in thousands) Fair Value Unrealized Losses Fair Value Unrealized Losses Fair Value Unrealized Losses # of holdings Federal agency obligations $ 13,956 $ 45 $ — $ — $ 13,956 $ 45 3 Residential federal agency MBS 68,138 1,236 8,008 325 76,146 1,561 31 Commercial federal agency MBS 60,060 1,730 — — 60,060 1,730 18 Municipal securities 60,436 1,520 — — 60,436 1,520 107 Corporate bonds 5,729 90 — — 5,729 90 37 Certificates of deposit 949 1 — — 949 1 4 Equity investments 1,185 20 2,743 282 3,928 302 3 Total temporarily impaired investment securities $ 210,453 $ 4,642 $ 10,751 $ 607 $ 221,204 $ 5,249 203
Investments Classified by Contractual Maturity Date	The contractual maturity distribution at June 30, 2017 of total debt securities was as follows: (Dollars in thousands) Amortized Cost Fair Value Due in one year or less $ 18,242 $ 18,283 Due after one, but within five years 112,036 113,033 Due after five, but within ten years 138,224 139,270 Due after ten years 111,158 111,232 Total debt securities $ 379,660 $ 381,818
Schedule of Realized Gain (Loss) on Sales of Investments	Sales of investments, including pending trades based on trade date, if applicable, for the three and six months ended June 30, 2017 and June 30, 2016 are summarized as follows: Three months ended June 30, Six months ended June 30, (Dollars in thousands) 2017 2016 2017 2016 Amortized cost of investments sold (1) $ 252 $ 1,460 $ 9,368 $ 1,764 Gross realized gains on sales 229 63 875 65 Gross realized losses on sales — — (106 ) — Total proceeds from sales of investments $ 481 $ 1,523 $ 10,137 $ 1,829 _________________________________________ (1) Amortized cost of investments sold is determined on a specific identification basis.

Loans (Tables)

Loans (Tables)	6 Months Ended
	Jun. 30, 2017
Receivables [Abstract]
Schedule of Loans by Loan Classification	Major classifications of loans at the periods indicated were as follows: (Dollars in thousands) June 30, December 31, Commercial real estate $ 1,107,714 $ 1,038,082 Commercial and industrial 505,240 490,799 Commercial construction 218,277 213,447 Total commercial loans 1,831,231 1,742,328 Residential mortgages 188,941 180,560 Home equity loans and lines 86,394 91,065 Consumer 10,064 10,845 Total retail loans 285,399 282,470 Gross loans 2,116,630 2,024,798 Deferred loan origination fees, net (2,230 ) (2,069 ) Total loans 2,114,400 2,022,729 Allowance for loan losses (31,958 ) (31,342 ) Net loans $ 2,082,442 $ 1,991,387
Schedule of Loans Pledged as Collateral	Loans designated as qualified collateral and pledged to the FHLB for borrowing capacity for the periods indicated are summarized below: (Dollars in thousands) June 30, December 31, Commercial real estate $ 233,768 $ 247,664 Residential mortgages 176,766 170,247 Home equity 10,449 12,340 Total loans pledged to FHLB $ 420,983 $ 430,251

Allowance For Loan Loss (Tables

Allowance For Loan Loss (Tables)	6 Months Ended
	Jun. 30, 2017
Receivables [Abstract]
Financing Receivables by Evaluation Method	The balances of loans as of June 30, 2017 by segment and evaluation method are summarized as follows: (Dollars in thousands) Loans individually evaluated for impairment Loans collectively evaluated for impairment Gross Loans Commercial real estate $ 15,584 $ 1,092,130 $ 1,107,714 Commercial and industrial 12,503 492,737 505,240 Commercial construction 1,619 216,658 218,277 Residential mortgages 272 188,669 188,941 Home equity loans and lines 494 85,900 86,394 Consumer 13 10,051 10,064 Total gross loans $ 30,485 $ 2,086,145 $ 2,116,630 The balances of loans as of December 31, 2016 by segment and evaluation method are summarized as follows: (Dollars in thousands) Loans individually evaluated for impairment Loans collectively evaluated for impairment Gross Loans Commercial real estate $ 14,261 $ 1,023,821 $ 1,038,082 Commercial and industrial 13,372 477,427 490,799 Commercial construction 3,364 210,083 213,447 Residential mortgages 289 180,271 180,560 Home equity loans and lines 509 90,556 91,065 Consumer 1 10,844 10,845 Total gross loans $ 31,796 $ 1,993,002 $ 2,024,798
Financing Receivable Credit Quality Indicators	The following tables present the Company's credit risk profile for each class of loan in its portfolio by internally assigned adverse risk rating category as of the periods indicated. June 30, 2017 Adversely Classified Not Adversely (Dollars in thousands) Substandard Doubtful Loss Classified Gross Loans Commercial real estate $ 15,915 $ — $ — $ 1,091,799 $ 1,107,714 Commercial and industrial 11,673 54 1 493,512 505,240 Commercial construction 1,620 — — 216,657 218,277 Residential mortgages 1,380 — — 187,561 188,941 Home equity loans and lines 644 — — 85,750 86,394 Consumer 41 — — 10,023 10,064 Total gross loans $ 31,273 $ 54 $ 1 $ 2,085,302 $ 2,116,630 December 31, 2016 Adversely Classified Not Adversely (Dollars in thousands) Substandard Doubtful Loss Classified Gross Loans Commercial real estate $ 16,003 $ — $ — $ 1,022,079 $ 1,038,082 Commercial and industrial 12,770 99 2 477,928 490,799 Commercial construction 3,364 — — 210,083 213,447 Residential mortgages 1,414 — — 179,146 180,560 Home equity loans and lines 666 — — 90,399 91,065 Consumer 30 — — 10,815 10,845 Total gross loans $ 34,247 $ 99 $ 2 $ 1,990,450 $ 2,024,798
Past Due Financing Receivables	The following tables present an age analysis of past due loans as of the dates indicated: Balance at June 30, 2017 (Dollars in thousands) 30-59 Days Past Due 60-89 Days Past Due Past Due 90 days or more Total Past Due Loans Current Loans Gross Loans Non-accrual Loans Commercial real estate $ 1,703 $ 74 $ 4,420 $ 6,197 $ 1,101,517 $ 1,107,714 $ 8,446 Commercial and industrial 308 1,411 1,463 3,182 502,058 505,240 3,744 Commercial construction 1,140 — — 1,140 217,137 218,277 200 Residential mortgages 128 — 186 314 188,627 188,941 272 Home equity loans and lines 88 96 212 396 85,998 86,394 594 Consumer 47 17 7 71 9,993 10,064 20 Total gross loans $ 3,414 $ 1,598 $ 6,288 $ 11,300 $ 2,105,330 $ 2,116,630 $ 13,276 Balance at December 31, 2016 (Dollars in thousands) 30-59 Days Past Due 60-89 Days Past Due Past Due 90 days or more Total Past Due Loans Current Loans Gross Loans Non-accrual Loans Commercial real estate $ 5,993 $ 923 $ 1,399 $ 8,315 $ 1,029,767 $ 1,038,082 $ 4,876 Commercial and industrial 267 4 1,544 1,815 488,984 490,799 3,174 Commercial construction — — — — 213,447 213,447 519 Residential mortgages 648 — 99 747 179,813 180,560 289 Home equity loans and lines 270 — 269 539 90,526 91,065 616 Consumer 94 13 11 118 10,727 10,845 11 Total gross loans $ 7,272 $ 940 $ 3,322 $ 11,534 $ 2,013,264 $ 2,024,798 $ 9,485
Impaired Financing Receivables	The following tables set forth the recorded investment in impaired loans and the related specific allowance allocated as of the dates indicated: Balance at June 30, 2017 (Dollars in thousands) Unpaid contractual principal balance Total recorded investment in impaired loans Recorded investment with no allowance Recorded investment with allowance Related specific allowance Commercial real estate $ 17,181 $ 15,584 $ 13,213 $ 2,371 $ 393 Commercial and industrial 13,183 12,503 8,749 3,754 1,771 Commercial construction 1,667 1,619 1,619 — — Residential mortgages 381 272 272 — — Home equity loans and lines 659 494 494 — — Consumer 14 13 — 13 13 Total $ 33,085 $ 30,485 $ 24,347 $ 6,138 $ 2,177 Balance at December 31, 2016 (Dollars in thousands) Unpaid contractual principal balance Total recorded investment in impaired loans Recorded investment with no allowance Recorded investment with allowance Related specific allowance Commercial real estate $ 16,010 $ 14,261 $ 12,444 $ 1,817 $ 370 Commercial and industrial 14,291 13,372 9,366 4,006 2,222 Commercial construction 3,408 3,364 3,051 313 28 Residential mortgages 388 289 289 — — Home equity loans and lines 665 509 509 — — Consumer 2 1 — 1 1 Total $ 34,764 $ 31,796 $ 25,659 $ 6,137 $ 2,621 The following table presents the average recorded investment in impaired loans and the related interest recognized during the three months indicated: Three Months Ended June 30, 2017 Three Months Ended June 30, 2016 (Dollars in thousands) Average recorded investment Interest income recognized Average recorded investment Interest income recognized Commercial real estate $ 14,403 $ 78 $ 12,700 $ 64 Commercial and industrial 12,367 76 8,090 39 Commercial construction 1,622 22 3,089 37 Residential mortgages 279 — 304 — Home equity loans and lines 565 — 306 — Consumer 15 — 20 — Total $ 29,251 $ 176 $ 24,509 $ 140 The following table presents the average recorded investment in impaired loans and the related interest recognized during the periods indicated: Six Months Ended June 30, 2017 Six Months Ended June 30, 2016 (Dollars in thousands) Average recorded investment Interest income recognized Average recorded investment Interest income recognized Commercial real estate $ 13,891 $ 179 $ 11,184 $ 107 Commercial and industrial 12,623 181 8,257 65 Commercial construction 2,017 49 3,032 74 Residential mortgages 283 — 306 — Home equity loans and lines 552 (2 ) 276 (2 ) Consumer 14 — 21 — Total $ 29,380 $ 407 $ 23,076 $ 244
Troubled Debt Restructurings on Financing Receivables	The following table sets forth the post modification balances of TDRs listed by type of modification for TDRs that occurred during the periods indicated. Six months ended (Dollars in thousands) June 30, 2017 June 30, 2016 Loan advances with adequate collateral $ 367 $ 6,337 Extended maturity date 5,739 201 Temporary payment reduction and payment re-amortization of remaining principal over extended term 1,086 — Temporary interest only payment plan 1,016 594 Total $ 8,208 $ 7,132 Loans modified as TDRs during the three month period ended June 30, 2017 are detailed below. Three months ended June 30, 2017 (Dollars in thousands) Number of restructurings Pre-modification outstanding recorded investment Post-modification outstanding recorded investment Commercial real estate 3 $ 929 $ 928 Commercial and industrial 10 2,213 2,326 Commercial construction 2 1,420 1,419 Residential mortgages — — — Home equity loans and lines — — — Consumer — — — Total 15 $ 4,562 $ 4,673 Payment defaults, during the three month period ended June 30, 2017 , on loans modified as TDRs within the preceding twelve months are detailed below. Three months ended June 30, 2017 (Dollars in thousands) Number of TDRs that defaulted Post- modification outstanding recorded investment Commercial real estate — $ — Commercial and industrial 5 1,457 Commercial construction — — Residential mortgages — — Home equity loans and lines — — Consumer — — Total 5 $ 1,457 Loans modified as TDRs during the six month period ended June 30, 2017 are detailed below. Six months ended June 30, 2017 (Dollars in thousands) Number of restructurings Pre-modification outstanding recorded investment Post-modification outstanding recorded investment Commercial real estate 4 $ 1,304 $ 1,299 Commercial and industrial 12 5,165 5,290 Commercial construction 3 1,626 1,619 Residential mortgages — — — Home equity loans and lines — — — Consumer — — — Total 19 $ 8,095 $ 8,208 Payment defaults, during the six months ended June 30, 2016 , on loans modified as TDRs within the preceding twelve months are detailed below. Six months ended June 30, 2016 (Dollars in thousands) Number of TDRs that defaulted Post- modification outstanding recorded investment Commercial real estate — — Commercial and industrial 2 $ 417 Commercial construction — — Residential mortgages — — Home equity loans and lines — — Consumer — — Total 2 $ 417 Payment defaults, during the six month period ended June 30, 2017 , on loans modified as TDRs within the preceding twelve months are detailed below. Six months ended June 30, 2017 (Dollars in thousands) Number of TDRs that defaulted Post- modification outstanding recorded investment Commercial real estate 2 $ 734 Commercial and industrial 6 1,687 Commercial construction — — Residential mortgages — — Home equity loans and lines — — Consumer — — Total 8 $ 2,421 Loans modified as TDRs during the three month period ended June 30, 2016 are detailed below. Three months ended June 30, 2016 (Dollars in thousands) Number of restructurings Pre-modification outstanding recorded investment Post-modification outstanding recorded investment Commercial real estate 4 $ 5,093 $ 5,059 Commercial and industrial 5 1,794 1,810 Commercial construction — — — Residential mortgages — — — Home equity loans and lines — — — Consumer — — — Total 9 $ 6,887 $ 6,869 Payment defaults, during the three months ended June 30, 2016 , on loans modified as TDRs within the preceding twelve months are detailed below. Three months ended June 30, 2016 (Dollars in thousands) Number of TDRs that defaulted Post- modification outstanding recorded investment Commercial real estate — $ — Commercial and industrial 2 417 Commercial construction — — Residential — — Home Equity — — Consumer — — Total 2 $ 417 Loans modified as TDRs during the six month period ended June 30, 2016 are detailed below. Six months ended June 30, 2016 (Dollars in thousands) Number of restructurings Pre-modification outstanding recorded investment Post-modification outstanding recorded investment Commercial real estate 4 $ 5,093 $ 5,059 Commercial and industrial 6 2,058 2,073 Commercial construction — — — Residential mortgages — — — Home equity loans and lines — — — Consumer — — — Total 10 $ 7,151 $ 7,132
Allowance for Credit Losses on Financing Receivables	(Dollars in thousands) Cmml Real Estate Cmml and Industrial Cmml Constr Resid. Mortgage Home Equity Consumer Total Beginning Balance at March 31, 2017 $ 15,294 $ 11,178 $ 3,364 $ 978 $ 635 $ 234 $ 31,683 Provision 295 (148 ) 120 11 (14 ) 16 280 Recoveries 56 71 — — 1 2 130 Less: Charge offs — 114 — — — 21 135 Ending Balance at June 30, 2017 $ 15,645 $ 10,987 $ 3,484 $ 989 $ 622 $ 231 $ 31,958 Changes in the allowance for loan losses by portfolio segment for the six months ended June 30, 2017 are presented below: (Dollars in thousands) Cmml Real Estate Cmml and Industrial Cmml Constr Resid. Mortgage Home Equity Consumer Total Beginning Balance at December 31, 2016 $ 14,902 $ 11,204 $ 3,406 $ 960 $ 634 $ 236 $ 31,342 Provision 611 (343 ) 78 29 (14 ) 44 405 Recoveries 132 343 — — 2 5 482 Less: Charge offs — 217 — — — 54 271 Ending Balance at June 30, 2017 $ 15,645 $ 10,987 $ 3,484 $ 989 $ 622 $ 231 $ 31,958 Ending allowance balance: Allocated to loans individually evaluated for impairment $ 393 $ 1,771 $ — $ — $ — $ 13 $ 2,177 Allocated to loans collectively evaluated for impairment $ 15,252 $ 9,216 $ 3,484 $ 989 $ 622 $ 218 $ 29,781 Changes in the allowance for loan losses by portfolio segment for the three months ended June 30, 2016 are presented below: (Dollars in thousands) Cmml Real Estate Cmml and Industrial Cmml Constr Resid. Mortgage Home Equity Consumer Total Beginning Balance at March 31, 2016 $ 13,827 $ 10,278 $ 3,964 $ 1,077 $ 541 $ 223 $ 29,910 Provision 865 (714 ) 92 8 9 7 267 Recoveries 1 480 — — 2 1 484 Less: Charge offs 179 131 — — — 6 316 Ending Balance at June 30, 2016 $ 14,514 $ 9,913 $ 4,056 $ 1,085 $ 552 $ 225 $ 30,345 Changes in the allowance for loan losses by portfolio segment for the six months ended June 30, 2016 are presented below: (Dollars in thousands) Cmml Real Estate Cmml and Industrial Cmml Constr Resid. Mortgage Home Equity Consumer Total Beginning Balance at December 31, 2015 $ 13,514 $ 9,758 $ 3,905 $ 1,061 $ 540 $ 230 $ 29,008 Provision 1,159 (251 ) 156 24 15 14 1,117 Recoveries 20 609 — — 2 3 634 Less: Charge offs 179 203 5 — 5 22 414 Ending Balance at June 30, 2016 $ 14,514 $ 9,913 $ 4,056 $ 1,085 $ 552 $ 225 $ 30,345 Ending allowance balance: Allocated to loans individually evaluated for impairment $ 541 $ 990 $ 550 $ — $ — $ 18 $ 2,099 Allocated to loans collectively evaluated for impairment $ 13,973 $ 8,923 $ 3,506 $ 1,085 $ 552 $ 207 $ 28,246

Deposits (Tables)

Deposits (Tables)	6 Months Ended
	Jun. 30, 2017
Deposits [Abstract]
Schedule of Deposit Liabilities	Deposits are summarized as follows: (Dollars in thousands) June 30, 2017 December 31, 2016 Non-interest bearing demand deposits $ 700,415 $ 646,115 Interest bearing checking 406,077 372,696 Savings 199,018 178,637 Money market 793,131 844,216 Certificates of deposit $250,000 or less 128,346 125,580 Certificates of deposit more than $250,000 39,335 42,315 Total customer deposits 2,266,322 2,209,559 Brokered deposits (1) 87,460 59,362 Total deposits $ 2,353,782 $ 2,268,921 ___________________________________ (1) Primarily brokered CDs $250,000 and under

Derivatives and Hedging Activ27

Derivatives and Hedging Activities (Tables)	6 Months Ended
	Jun. 30, 2017
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Schedule of Derivatives, Fair Value and Classification	The table below presents the fair value and classification of the Company’s derivative financial instruments for the periods presented: As of June 30, 2017 As of December 31, 2016 (Dollars in thousands) Asset Derivatives Liability Derivatives Asset Derivatives Liability Derivatives Back-to-Back Swaps $ 459 $ 459 $ 610 $ 610
Schedule of Derivatives- Offsetting Assets and Liabilities	The table below also presents the Company's asset and liability derivative positions and the potential effect of netting arrangements on its financial position, as of the periods presented. June 30, 2017 Gross Amounts of Recognized Asset/Liabilities Gross Amounts Offset in the Statement of Financial Position Net Amounts of Assets Presented in the Statement of Financial Position Gross amounts not offset in the Statement of Financial Position (Dollars in thousands) Financial Instruments Cash collateral (Received)/Posted Net Amount Asset Derivatives Back-to-Back Swaps $ 459 $ — $ 459 $ — $ — $ 459 Liability Derivatives Back-to-Back Swaps $ 459 $ — $ 459 $ — $ — $ 459 December 31, 2016 Gross Amounts of Recognized Asset/Liabilities Gross Amounts Offset in the Statement of Financial Position Net Amounts of Assets Presented in the Statement of Financial Position Gross amounts not offset in the Statement of Financial Position (Dollars in thousands) Financial Instruments Cash collateral (Received)/Posted Net Amount Asset Derivatives Back-to-Back Swaps $ 610 $ — $ 610 $ — $ — $ 610 Liability Derivatives Back-to-Back Swaps $ 610 $ — $ 610 $ — $ — $ 610

Supplemental Life Insurance (Ta

Supplemental Life Insurance (Tables)	6 Months Ended
	Jun. 30, 2017
Supplemental Life Insurance
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Schedule of Net Benefit Costs	The following table illustrates the net periodic post-retirement benefit cost for the supplemental life insurance plans for the periods indicated: Three months ended June 30, Six months ended June 30, (Dollars in thousands) 2017 2016 2017 2016 Service Cost $ (3 ) $ (3 ) $ (6 ) $ (5 ) Interest Cost 23 21 46 42 Net periodic post-retirement benefit cost $ 20 $ 18 $ 40 $ 37

Stock-Based Compensation (Table

Stock-Based Compensation (Tables)	6 Months Ended
	Jun. 30, 2017
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]
Schedule of Share-based Payment Award, Stock Options, Valuation Assumptions	The table below provides a summary of the options granted in during the periods indicated: Six Months Ended June 30, 2017 2016 Options granted 15,009 31,047 Term in years 10 10 Weighted average assumptions used in the fair value model: Expected volatility 40 % 42 % Expected dividend yield 2.09 % 3.02 % Expected life in years 7 7 Risk-free interest rate 2.35 % 1.91 % Weighted average market price on date of grants $ 30.46 $ 21.91 Per share weighted average fair value $ 11.34 $ 7.91 Fair value as a percentage of market value at grant date 37 % 36 %
Schedule of Restricted Stock Awards Granted	The table below provides a summary of restricted stock awards granted during the periods indicated: Six Months Ended June 30, Restricted Stock Awards (no. of underlying shares) 2017 2016 Two Year Vesting 6,944 9,060 Four Year Vesting 16,253 18,298 Performance-Based Vesting 25,623 35,071 Total Restricted Stock Awards 48,820 62,429 Weighted average grant date fair value $ 30.46 $ 21.90

Earnings Per Share (Tables)

Earnings Per Share (Tables)	6 Months Ended
	Jun. 30, 2017
Earnings Per Share [Abstract]
Schedule of Weighted Average Number of Shares	The table below presents the increase in average shares outstanding, using the treasury stock method, for the diluted earnings per share calculation for the periods indicated: Three months ended June 30, Six months ended June 30, 2017 2016 2017 2016 Basic weighted average common shares outstanding 11,572,430 10,561,680 11,540,796 10,483,396 Dilutive shares 80,259 68,220 84,916 67,446 Diluted weighted average common shares outstanding 11,652,689 10,629,900 11,625,712 10,550,842

Fair Value Measurements (Tables

Fair Value Measurements (Tables)	6 Months Ended
	Jun. 30, 2017
Fair Value Disclosures [Abstract]
Fair Value, Assets Measured on Recurring and Nonrecurring Basis	The following tables summarize significant assets and liabilities carried at fair value and placement in the fair value hierarchy at the dates specified: June 30, 2017 Fair Value Measurements using: (Dollars in thousands) Fair Value (level 1) (level 2) (level 3) Assets measured on a recurring basis: Debt securities $ 381,818 $ — $ 381,818 $ — Equity securities 6,187 6,187 — — FHLB stock 4,364 — — 4,364 Interest-rate swaps 459 — 459 — Assets measured on a non-recurring basis: Impaired loans (collateral dependent) 3,919 — — 3,919 Liabilities measured on a recurring basis: Interest-rate swaps 459 — 459 — December 31, Fair Value Measurements using: (Dollars in thousands) Fair Value (level 1) (level 2) (level 3) Assets measured on a recurring basis: Debt securities $ 362,147 $ — $ 362,147 $ — Equity investments 12,643 12,643 — — FHLB stock 2,094 — — 2,094 Interest-rate swaps 610 — 610 — Assets measured on a non-recurring basis: Impaired loans (collateral dependent) 3,481 — — 3,481 Liabilities measured on a recurring basis: Interest-rate swaps 610 — 610 —
Quantitative Information About Significant Unobservable Inputs for Fair Value Measurements	The following table presents additional quantitative information about assets measured at fair value on a recurring and non-recurring basis for which the Company utilized Level 3 inputs (significant unobservable inputs for situations in which there is little, if any, market activity for the asset or liability) to determine fair value as of June 30, 2017 : (Dollars in thousands) Fair Value Valuation Technique Unobservable Input Unobservable Input Value or Range Assets measured on a recurring basis: FHLB stock $ 4,364 FHLB Stated Par Value N/A N/A Assets measured on a non-recurring basis: Impaired loans (collateral dependent) $ 3,919 Appraisal of collateral Appraisal adjustments (1) 5% - 50% (1) Appraisals may be adjusted by management for qualitative factors such as economic conditions and estimated liquidation expenses.
Fair Value, by Balance Sheet Grouping	The carrying values, estimated fair values and placement in the fair value hierarchy of the Company's financial instruments for which fair value is only disclosed but not recognized on the balance sheet at the dates indicated are summarized as follows: June 30, 2017 Fair value measurement (Dollars in thousands) Carrying Amount Fair Value Level 1 inputs Level 2 Inputs Level 3 Inputs Financial assets: Loans held for sale $ 856 $ 857 $ — $ 857 $ — Loans, net 2,082,442 2,089,802 — — 2,089,802 Financial liabilities: Certificates of deposit (including brokered) 255,141 254,349 — 254,349 — Borrowed funds 44,255 44,249 — 44,249 — Subordinated debt 14,841 14,246 — — 14,246 December 31, 2016 Fair value measurement (Dollars in thousands) Carrying Amount Fair Value Level 1 inputs Level 2 Inputs Level 3 Inputs Financial assets: Loans held for sale $ 1,569 $ 1,569 $ — $ 1,569 $ — Loans, net 1,991,387 1,997,887 — — 1,997,887 Financial liabilities: Certificates of deposit (including brokered) 227,257 226,536 — 226,536 — Borrowed funds 10,671 10,670 — 10,670 — Subordinated debt 14,834 14,011 — — 14,011

Summary of Significant Accoun32

Summary of Significant Accounting Policies (Details) $ in Thousands	3 Months Ended		6 Months Ended		12 Months Ended
	Jun. 30, 2017USD ($)propertybranches	Jun. 30, 2016USD ($)	Jun. 30, 2017USD ($)propertybranchessegment	Jun. 30, 2016USD ($)	Dec. 31, 2016USD ($)	Jul. 31, 2000branches
Summary of Significant Accounting Policies [Line Items]
Number of branches | branches	23		23
Reportable operating segments | segment			1
Tax benefit from stock compensation					$ 789
Other Comprehensive Income (Loss), Net of Tax	$ 2,993	$ 2,535	$ 3,622	$ 4,410
Number of operating leases | property	17		17
Goodwill	$ 5,656		$ 5,656		$ 5,656
Number of offices related to the goodwill in acquisition | branches						2
Equity investments
Summary of Significant Accounting Policies [Line Items]
Other Comprehensive Income (Loss), Net of Tax			47	$ (28)
Income Tax Expense | Accounting Standards Update 2016-09
Summary of Significant Accounting Policies [Line Items]
Income Tax benefit for Stock Compensation in Income Statement			$ 788

Investment Securities (Details)

Investment Securities (Details) - USD ($) $ in Thousands		Jun. 30, 2017	Dec. 31, 2016
Investment Securities, Gross Unrealized Gain (Loss) [Abstract]
Fair Value		$ 388,005	$ 374,790
Securities pledged as collateral		378,700
Debt securities
Investment Securities, Gross Unrealized Gain (Loss) [Abstract]
Amortized cost		379,660	365,578
Unrealized gains		4,209	1,516
Unrealized losses		2,051	4,947
Fair Value		381,818	362,147
Federal Agency Obligations
Investment Securities, Gross Unrealized Gain (Loss) [Abstract]
Amortized cost	[1]	74,736	74,682
Unrealized gains	[1]	492	432
Unrealized losses	[1]	39	45
Fair Value	[1]	75,189	75,069
Residential federal agency MBS
Investment Securities, Gross Unrealized Gain (Loss) [Abstract]
Amortized cost	[1]	96,307	94,818
Unrealized gains	[1]	339	96
Unrealized losses	[1]	932	1,561
Fair Value	[1]	95,714	93,353
Collateralized Mortgage Obligations
Investment Securities, Gross Unrealized Gain (Loss) [Abstract]
Fair Value		106,000	107,000
Commercial federal agency MBS
Investment Securities, Gross Unrealized Gain (Loss) [Abstract]
Amortized cost	[1]	76,800	71,993
Unrealized gains	[1]	380	15
Unrealized losses	[1]	743	1,730
Fair Value	[1]	76,437	70,278
Municipal securities
Investment Securities, Gross Unrealized Gain (Loss) [Abstract]
Amortized cost		119,598	112,401
Unrealized gains		2,866	922
Unrealized losses		306	1,520
Fair Value		122,158	111,803
Corporate bonds
Investment Securities, Gross Unrealized Gain (Loss) [Abstract]
Amortized cost		11,269	10,734
Unrealized gains		129	51
Unrealized losses		31	90
Fair Value		11,367	10,695
Certificates of Deposit
Investment Securities, Gross Unrealized Gain (Loss) [Abstract]
Amortized cost	[2]	950	950
Unrealized gains	[2]	3	0
Unrealized losses	[2]	0	1
Fair Value	[2]	953	949
Equity investments
Investment Securities, Gross Unrealized Gain (Loss) [Abstract]
Amortized cost		3,884	10,413
Unrealized gains		2,311	2,532
Unrealized losses		8	302
Fair Value		$ 6,187	12,643
Percent of portfolio invested in financial services		46.00%
Available for sale securities
Investment Securities, Gross Unrealized Gain (Loss) [Abstract]
Amortized cost		$ 383,544	375,991
Unrealized gains		6,520	4,048
Unrealized losses		2,059	5,249
Fair Value		$ 388,005	$ 374,790
[1]	These categories may include investments issued or guaranteed by government sponsored enterprises such as Fannie Mae ("FNMA"), Freddie Mac ("FHLMC"), Federal Farm Credit Bank ("FFCB"), or one of several Federal Home Loan Banks, as well as, investments guaranteed by Ginnie Mae ("GNMA"), a wholly-owned government entity.
[2]	Certificates of deposits ("CDs") represent term deposits issued by banks that are subject to FDIC insurance and purchased on the open market.

Investment Securities Continuou

Investment Securities Continuous loss position (Details) $ in Thousands	Jun. 30, 2017USD ($)investments	Dec. 31, 2016USD ($)investments
Schedule of Investment Securities [Line Items]
Investments temporarily impaired, less than 12 months, fair value	$ 121,167	$ 210,453
Investments temporarily impaired, less than 12 months, unrealized losses	1,656	4,642
Investments temporarily impaired, 12 months or longer, fair value	13,460	10,751
Investments temporarily impaired, 12 months or longer, Unrealized Losses	403	607
Investments Temporarily Impaired, Fair Value	134,627	221,204
investments temporarily impaired unrealized losses	$ 2,059	$ 5,249
Number of securities in loss position | investments	91	203
Federal agency obligations
Schedule of Investment Securities [Line Items]
Investments temporarily impaired, less than 12 months, fair value	$ 18,006	$ 13,956
Investments temporarily impaired, less than 12 months, unrealized losses	39	45
Investments temporarily impaired, 12 months or longer, fair value	0	0
Investments temporarily impaired, 12 months or longer, Unrealized Losses	0	0
Investments Temporarily Impaired, Fair Value	18,006	13,956
investments temporarily impaired unrealized losses	$ 39	$ 45
Number of securities in loss position | investments	5	3
Residential federal agency MBS
Schedule of Investment Securities [Line Items]
Investments temporarily impaired, less than 12 months, fair value	$ 42,216	$ 68,138
Investments temporarily impaired, less than 12 months, unrealized losses	573	1,236
Investments temporarily impaired, 12 months or longer, fair value	11,990	8,008
Investments temporarily impaired, 12 months or longer, Unrealized Losses	359	325
Investments Temporarily Impaired, Fair Value	54,206	76,146
investments temporarily impaired unrealized losses	$ 932	$ 1,561
Number of securities in loss position | investments	23	31
Commercial federal agency MBS
Schedule of Investment Securities [Line Items]
Investments temporarily impaired, less than 12 months, fair value	$ 38,490	$ 60,060
Investments temporarily impaired, less than 12 months, unrealized losses	743	1,730
Investments temporarily impaired, 12 months or longer, fair value	0	0
Investments temporarily impaired, 12 months or longer, Unrealized Losses	0	0
Investments Temporarily Impaired, Fair Value	38,490	60,060
investments temporarily impaired unrealized losses	$ 743	$ 1,730
Number of securities in loss position | investments	11	18
Municipal securities
Schedule of Investment Securities [Line Items]
Investments temporarily impaired, less than 12 months, fair value	$ 19,527	$ 60,436
Investments temporarily impaired, less than 12 months, unrealized losses	266	1,520
Investments temporarily impaired, 12 months or longer, fair value	1,045	0
Investments temporarily impaired, 12 months or longer, Unrealized Losses	40	0
Investments Temporarily Impaired, Fair Value	20,572	60,436
investments temporarily impaired unrealized losses	$ 306	$ 1,520
Number of securities in loss position | investments	29	107
Corporate bonds
Schedule of Investment Securities [Line Items]
Investments temporarily impaired, less than 12 months, fair value	$ 2,713	$ 5,729
Investments temporarily impaired, less than 12 months, unrealized losses	27	90
Investments temporarily impaired, 12 months or longer, fair value	425	0
Investments temporarily impaired, 12 months or longer, Unrealized Losses	4	0
Investments Temporarily Impaired, Fair Value	3,138	5,729
investments temporarily impaired unrealized losses	$ 31	$ 90
Number of securities in loss position | investments	19	37
Certificates of Deposit
Schedule of Investment Securities [Line Items]
Investments temporarily impaired, less than 12 months, fair value	$ 0	$ 949
Investments temporarily impaired, less than 12 months, unrealized losses	0	1
Investments temporarily impaired, 12 months or longer, fair value	0	0
Investments temporarily impaired, 12 months or longer, Unrealized Losses	0	0
Investments Temporarily Impaired, Fair Value	0	949
investments temporarily impaired unrealized losses	$ 0	$ 1
Number of securities in loss position | investments	0	4
Equity investments
Schedule of Investment Securities [Line Items]
Investments temporarily impaired, less than 12 months, fair value	$ 215	$ 1,185
Investments temporarily impaired, less than 12 months, unrealized losses	8	20
Investments temporarily impaired, 12 months or longer, fair value	0	2,743
Investments temporarily impaired, 12 months or longer, Unrealized Losses	0	282
Investments Temporarily Impaired, Fair Value	215	3,928
investments temporarily impaired unrealized losses	$ 8	$ 302
Number of securities in loss position | investments	4	3

Investment Securities Maturitie

Investment Securities Maturities (Details) - USD ($) $ in Thousands	Jun. 30, 2017	Dec. 31, 2016
Schedule of Investment Securities [Line Items]
Investment securities at fair value	$ 388,005	$ 374,790
Callable debt securities, fair value	52,200
Debt securities
Schedule of Investment Securities [Line Items]
Amortized Cost, Within One Year	18,242
Fair Value, Within One Year	18,283
Amortized Cost Basis, After One, But Within Five Years	112,036
Fair Value, After One, But Within Five Years	113,033
Amortized Cost, After Five, But Within Ten Years	138,224
Fair Value, after Five but Within Ten Years	139,270
Amortized Cost Basis, After Ten Years	111,158
Fair Value, After Ten Years	111,232
Amortized cost	379,660	365,578
Investment securities at fair value	$ 381,818	$ 362,147

Investment Securities Sales (De

Investment Securities Sales (Details) - USD ($) $ in Thousands		3 Months Ended		6 Months Ended
		Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016
Investments, Debt and Equity Securities [Abstract]
Amortized cost of investments sold, including pending trades based on trade date	[1]	$ 252	$ 1,460	$ 9,368	$ 1,764
Gross realized gains on sales		229	63	875	65
Gross realized losses on sales		0	0	(106)	0
Proceeds from sale of investment securities, including pending trades based on trade date		$ 481	$ 1,523	$ 10,137	$ 1,829
[1]	Amortized cost of investments sold is determined on a specific identification basis.

Loans - Balance by Class of Loa

Loans - Balance by Class of Loans (Details) - USD ($) $ in Thousands	Jun. 30, 2017	Mar. 31, 2017	Dec. 31, 2016	Jun. 30, 2016	Mar. 31, 2016	Dec. 31, 2015
Schedule of Loans by Loan Classification [Line Items]
Gross loans	$ 2,116,630		$ 2,024,798
Deferred loan origination fees, net	(2,230)		(2,069)
Total loans	2,114,400		2,022,729
Allowance for loan losses	(31,958)	$ (31,683)	(31,342)	$ (30,345)	$ (29,910)	$ (29,008)
Net Loans	2,082,442		1,991,387
Commercial
Schedule of Loans by Loan Classification [Line Items]
Gross loans	1,831,231		1,742,328
Commercial real estate
Schedule of Loans by Loan Classification [Line Items]
Gross loans	1,107,714		1,038,082
Allowance for loan losses	(15,645)	(15,294)	(14,902)	(14,514)	(13,827)	(13,514)
Commercial and industrial
Schedule of Loans by Loan Classification [Line Items]
Gross loans	505,240		490,799
Allowance for loan losses	(10,987)	(11,178)	(11,204)	(9,913)	(10,278)	(9,758)
Commercial construction
Schedule of Loans by Loan Classification [Line Items]
Gross loans	218,277		213,447
Allowance for loan losses	(3,484)	(3,364)	(3,406)	(4,056)	(3,964)	(3,905)
Retail
Schedule of Loans by Loan Classification [Line Items]
Gross loans	285,399		282,470
Residential
Schedule of Loans by Loan Classification [Line Items]
Gross loans	188,941		180,560
Allowance for loan losses	(989)	(978)	(960)	(1,085)	(1,077)	(1,061)
Home Equity
Schedule of Loans by Loan Classification [Line Items]
Gross loans	86,394		91,065
Allowance for loan losses	(622)	(635)	(634)	(552)	(541)	(540)
Consumer
Schedule of Loans by Loan Classification [Line Items]
Gross loans	10,064		10,845
Allowance for loan losses	$ (231)	$ (234)	$ (236)	$ (225)	$ (223)	$ (230)

Loans - Loan Categories Narrati

Loans - Loan Categories Narrative (Details) $ in Millions	6 Months Ended
	Jun. 30, 2017USD ($)payment	Dec. 31, 2016USD ($)
Commercial
Schedule of Loans by Loan Classification [Line Items]
Participation loans amount	$ 86.6	$ 85.2
Participations loans sold that are still serviced amount	$ 65.8	62.3
Commercial real estate | Minimum
Schedule of Loans by Loan Classification [Line Items]
Repayment period, term of loan	15 years
Commercial real estate | Maximum
Schedule of Loans by Loan Classification [Line Items]
Repayment period, term of loan	25 years
Commercial and industrial | Minimum
Schedule of Loans by Loan Classification [Line Items]
Repayment period, term of loan	1 year
Commercial and industrial | Maximum
Schedule of Loans by Loan Classification [Line Items]
Repayment period, term of loan	7 years
Commercial construction | Minimum
Schedule of Loans by Loan Classification [Line Items]
Repayment period, term of loan	1 year
Commercial construction | Maximum
Schedule of Loans by Loan Classification [Line Items]
Repayment period, term of loan	3 years
Residential
Schedule of Loans by Loan Classification [Line Items]
Early Payment Default Period | payment	4
Amount of loans serviced for others	$ 17.5	$ 18.7
Residential | Maximum
Schedule of Loans by Loan Classification [Line Items]
Repayment period, term of loan	30 years
Home Equity | Maximum
Schedule of Loans by Loan Classification [Line Items]
Loan-to-value ratio	80.00%
Home Equity Loans | Minimum
Schedule of Loans by Loan Classification [Line Items]
Repayment period, term of loan	3 years
Home Equity Loans | Maximum
Schedule of Loans by Loan Classification [Line Items]
Repayment period, term of loan	15 years
Home equity lines of credit
Schedule of Loans by Loan Classification [Line Items]
Term of interest only payments	10 years
Term of Principal and Interest Payments after Interest only term	15 years
Multi-family owner occupied residential property | Minimum
Schedule of Loans by Loan Classification [Line Items]
Loan-to-value ratio	75.00%
Single family owner occupied residential property | Maximum
Schedule of Loans by Loan Classification [Line Items]
Loan-to-value ratio	97.00%

Loans - Loans Serving as Collat

Loans - Loans Serving as Collateral (Details) - USD ($) $ in Thousands	Jun. 30, 2017	Dec. 31, 2016
Financial Instruments Owned and Pledged as Collateral [Line Items]
Loans pledged to the FHLB for borrowing capacity	$ 420,983	$ 430,251
Commercial real estate
Financial Instruments Owned and Pledged as Collateral [Line Items]
Loans pledged to the FHLB for borrowing capacity	233,768	247,664
Residential
Financial Instruments Owned and Pledged as Collateral [Line Items]
Loans pledged to the FHLB for borrowing capacity	176,766	170,247
Home Equity
Financial Instruments Owned and Pledged as Collateral [Line Items]
Loans pledged to the FHLB for borrowing capacity	$ 10,449	$ 12,340

Allowance For Loan Loss - Evalu

Allowance For Loan Loss - Evaluation Method (Details) - USD ($) $ in Thousands	Jun. 30, 2017	Dec. 31, 2016
Schedule of Financing Receivable by Evaluation Method [Line Items]
Loans individually evaluated for impairment	$ 30,485	$ 31,796
Loans collectively evaluated for impairment	2,086,145	1,993,002
Gross loans	2,116,630	2,024,798
Commercial real estate
Schedule of Financing Receivable by Evaluation Method [Line Items]
Loans individually evaluated for impairment	15,584	14,261
Loans collectively evaluated for impairment	1,092,130	1,023,821
Gross loans	1,107,714	1,038,082
Commercial and industrial
Schedule of Financing Receivable by Evaluation Method [Line Items]
Loans individually evaluated for impairment	12,503	13,372
Loans collectively evaluated for impairment	492,737	477,427
Gross loans	505,240	490,799
Commercial construction
Schedule of Financing Receivable by Evaluation Method [Line Items]
Loans individually evaluated for impairment	1,619	3,364
Loans collectively evaluated for impairment	216,658	210,083
Gross loans	218,277	213,447
Residential
Schedule of Financing Receivable by Evaluation Method [Line Items]
Loans individually evaluated for impairment	272	289
Loans collectively evaluated for impairment	188,669	180,271
Gross loans	188,941	180,560
Home Equity
Schedule of Financing Receivable by Evaluation Method [Line Items]
Loans individually evaluated for impairment	494	509
Loans collectively evaluated for impairment	85,900	90,556
Gross loans	86,394	91,065
Consumer
Schedule of Financing Receivable by Evaluation Method [Line Items]
Loans individually evaluated for impairment	13	1
Loans collectively evaluated for impairment	10,051	10,844
Gross loans	$ 10,064	$ 10,845

Allowance For Loan Loss - Adver

Allowance For Loan Loss - Adversely Classified Loans (Details) - USD ($) $ in Thousands	Jun. 30, 2017	Dec. 31, 2016
Financing Receivable, Recorded Investment [Line Items]
Gross loans	$ 2,116,630	$ 2,024,798
Adversely classified loans to total loans	1.48%	1.70%
Commercial real estate
Financing Receivable, Recorded Investment [Line Items]
Gross loans	$ 1,107,714	$ 1,038,082
Commercial and industrial
Financing Receivable, Recorded Investment [Line Items]
Gross loans	505,240	490,799
Commercial construction
Financing Receivable, Recorded Investment [Line Items]
Gross loans	218,277	213,447
Residential
Financing Receivable, Recorded Investment [Line Items]
Gross loans	188,941	180,560
Home Equity
Financing Receivable, Recorded Investment [Line Items]
Gross loans	86,394	91,065
Consumer
Financing Receivable, Recorded Investment [Line Items]
Gross loans	10,064	10,845
Substandard
Financing Receivable, Recorded Investment [Line Items]
Gross loans	31,273	34,247
Substandard | Commercial real estate
Financing Receivable, Recorded Investment [Line Items]
Gross loans	15,915	16,003
Substandard | Commercial and industrial
Financing Receivable, Recorded Investment [Line Items]
Gross loans	11,673	12,770
Substandard | Commercial construction
Financing Receivable, Recorded Investment [Line Items]
Gross loans	1,620	3,364
Substandard | Residential
Financing Receivable, Recorded Investment [Line Items]
Gross loans	1,380	1,414
Substandard | Home Equity
Financing Receivable, Recorded Investment [Line Items]
Gross loans	644	666
Substandard | Consumer
Financing Receivable, Recorded Investment [Line Items]
Gross loans	41	30
Doubtful
Financing Receivable, Recorded Investment [Line Items]
Gross loans	54	99
Doubtful | Commercial real estate
Financing Receivable, Recorded Investment [Line Items]
Gross loans	0	0
Doubtful | Commercial and industrial
Financing Receivable, Recorded Investment [Line Items]
Gross loans	54	99
Doubtful | Commercial construction
Financing Receivable, Recorded Investment [Line Items]
Gross loans	0	0
Doubtful | Residential
Financing Receivable, Recorded Investment [Line Items]
Gross loans	0	0
Doubtful | Home Equity
Financing Receivable, Recorded Investment [Line Items]
Gross loans	0	0
Doubtful | Consumer
Financing Receivable, Recorded Investment [Line Items]
Gross loans	0	0
Loss
Financing Receivable, Recorded Investment [Line Items]
Gross loans	1	2
Loss | Commercial real estate
Financing Receivable, Recorded Investment [Line Items]
Gross loans	0	0
Loss | Commercial and industrial
Financing Receivable, Recorded Investment [Line Items]
Gross loans	1	2
Loss | Commercial construction
Financing Receivable, Recorded Investment [Line Items]
Gross loans	0	0
Loss | Residential
Financing Receivable, Recorded Investment [Line Items]
Gross loans	0	0
Loss | Home Equity
Financing Receivable, Recorded Investment [Line Items]
Gross loans	0	0
Loss | Consumer
Financing Receivable, Recorded Investment [Line Items]
Gross loans	0	0
Not Adversely Classified
Financing Receivable, Recorded Investment [Line Items]
Gross loans	2,085,302	1,990,450
Not Adversely Classified | Commercial real estate
Financing Receivable, Recorded Investment [Line Items]
Gross loans	1,091,799	1,022,079
Not Adversely Classified | Commercial and industrial
Financing Receivable, Recorded Investment [Line Items]
Gross loans	493,512	477,928
Not Adversely Classified | Commercial construction
Financing Receivable, Recorded Investment [Line Items]
Gross loans	216,657	210,083
Not Adversely Classified | Residential
Financing Receivable, Recorded Investment [Line Items]
Gross loans	187,561	179,146
Not Adversely Classified | Home Equity
Financing Receivable, Recorded Investment [Line Items]
Gross loans	85,750	90,399
Not Adversely Classified | Consumer
Financing Receivable, Recorded Investment [Line Items]
Gross loans	$ 10,023	$ 10,815

Allowance For Loan Loss - Past

Allowance For Loan Loss - Past Due and Non-Accrual Loans (Details) - USD ($) $ in Thousands	Jun. 30, 2017	Dec. 31, 2016
Schedule of Aging of Financing Receivables [Line Items]
Non-accrual loans	$ 13,276	$ 9,485
Total Past Due Loans	11,300	11,534
Current Loans	2,105,330	2,013,264
Gross loans	$ 2,116,630	$ 2,024,798
The ratio of non-accrual loans to total loans	0.63%	0.47%
Commercial real estate
Schedule of Aging of Financing Receivables [Line Items]
Non-accrual loans	$ 8,446	$ 4,876
Total Past Due Loans	6,197	8,315
Current Loans	1,101,517	1,029,767
Gross loans	1,107,714	1,038,082
Commercial and industrial
Schedule of Aging of Financing Receivables [Line Items]
Non-accrual loans	3,744	3,174
Total Past Due Loans	3,182	1,815
Current Loans	502,058	488,984
Gross loans	505,240	490,799
Commercial construction
Schedule of Aging of Financing Receivables [Line Items]
Non-accrual loans	200	519
Total Past Due Loans	1,140	0
Current Loans	217,137	213,447
Gross loans	218,277	213,447
Residential
Schedule of Aging of Financing Receivables [Line Items]
Non-accrual loans	272	289
Total Past Due Loans	314	747
Current Loans	188,627	179,813
Gross loans	188,941	180,560
Home Equity
Schedule of Aging of Financing Receivables [Line Items]
Non-accrual loans	594	616
Total Past Due Loans	396	539
Current Loans	85,998	90,526
Gross loans	86,394	91,065
Consumer
Schedule of Aging of Financing Receivables [Line Items]
Non-accrual loans	20	11
Total Past Due Loans	71	118
Current Loans	9,993	10,727
Gross loans	10,064	10,845
Loans 30 to 59 Days Past Due
Schedule of Aging of Financing Receivables [Line Items]
Gross loans	3,414	7,272
Loans 30 to 59 Days Past Due | Commercial real estate
Schedule of Aging of Financing Receivables [Line Items]
Gross loans	1,703	5,993
Loans 30 to 59 Days Past Due | Commercial and industrial
Schedule of Aging of Financing Receivables [Line Items]
Gross loans	308	267
Loans 30 to 59 Days Past Due | Commercial construction
Schedule of Aging of Financing Receivables [Line Items]
Gross loans	1,140	0
Loans 30 to 59 Days Past Due | Residential
Schedule of Aging of Financing Receivables [Line Items]
Gross loans	128	648
Loans 30 to 59 Days Past Due | Home Equity
Schedule of Aging of Financing Receivables [Line Items]
Gross loans	88	270
Loans 30 to 59 Days Past Due | Consumer
Schedule of Aging of Financing Receivables [Line Items]
Gross loans	47	94
Loans 60 to 89 Days Past Due
Schedule of Aging of Financing Receivables [Line Items]
Gross loans	1,598	940
Loans 60 to 89 Days Past Due | Commercial real estate
Schedule of Aging of Financing Receivables [Line Items]
Gross loans	74	923
Loans 60 to 89 Days Past Due | Commercial and industrial
Schedule of Aging of Financing Receivables [Line Items]
Gross loans	1,411	4
Loans 60 to 89 Days Past Due | Commercial construction
Schedule of Aging of Financing Receivables [Line Items]
Gross loans	0	0
Loans 60 to 89 Days Past Due | Residential
Schedule of Aging of Financing Receivables [Line Items]
Gross loans	0	0
Loans 60 to 89 Days Past Due | Home Equity
Schedule of Aging of Financing Receivables [Line Items]
Gross loans	96	0
Loans 60 to 89 Days Past Due | Consumer
Schedule of Aging of Financing Receivables [Line Items]
Gross loans	17	13
Loans Equal to Greater than 90 Days Past Due
Schedule of Aging of Financing Receivables [Line Items]
Gross loans	6,288	3,322
Loans Equal to Greater than 90 Days Past Due | Commercial real estate
Schedule of Aging of Financing Receivables [Line Items]
Gross loans	4,420	1,399
Loans Equal to Greater than 90 Days Past Due | Commercial and industrial
Schedule of Aging of Financing Receivables [Line Items]
Gross loans	1,463	1,544
Loans Equal to Greater than 90 Days Past Due | Commercial construction
Schedule of Aging of Financing Receivables [Line Items]
Gross loans	0	0
Loans Equal to Greater than 90 Days Past Due | Residential
Schedule of Aging of Financing Receivables [Line Items]
Gross loans	186	99
Loans Equal to Greater than 90 Days Past Due | Home Equity
Schedule of Aging of Financing Receivables [Line Items]
Gross loans	212	269
Loans Equal to Greater than 90 Days Past Due | Consumer
Schedule of Aging of Financing Receivables [Line Items]
Gross loans	7	11
Not Adversely Classified
Schedule of Aging of Financing Receivables [Line Items]
Gross loans	2,085,302	1,990,450
Non-accrual loans not adversely classified	81	220
Not Adversely Classified | Commercial real estate
Schedule of Aging of Financing Receivables [Line Items]
Gross loans	1,091,799	1,022,079
Not Adversely Classified | Commercial and industrial
Schedule of Aging of Financing Receivables [Line Items]
Gross loans	493,512	477,928
Not Adversely Classified | Commercial construction
Schedule of Aging of Financing Receivables [Line Items]
Gross loans	216,657	210,083
Not Adversely Classified | Residential
Schedule of Aging of Financing Receivables [Line Items]
Gross loans	187,561	179,146
Not Adversely Classified | Home Equity
Schedule of Aging of Financing Receivables [Line Items]
Gross loans	85,750	90,399
Not Adversely Classified | Consumer
Schedule of Aging of Financing Receivables [Line Items]
Gross loans	$ 10,023	$ 10,815

Allowance For Loan Loss - Impai

Allowance For Loan Loss - Impaired Loans (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016	Dec. 31, 2016
Financing Receivable, Impaired [Line Items]
Total recorded investment in impaired loans	$ 30,485		$ 30,485		$ 31,796
Total accruing impaired loans	17,300		17,300		22,400
Impaired non-accrual loans	13,200		13,200		9,400
Unpaid contractual principal balance	33,085		33,085		34,764
Recorded investment with no allowance	24,347		24,347		25,659
Recorded investment with allowance	6,138		6,138		6,137
Related allowance	2,177		2,177		2,621
Average recorded investment	29,251	$ 24,509	29,380	$ 23,076
Interest income recognized	176	140	407	244
Additional funding commitments on impaired loans	394		394
Commercial real estate
Financing Receivable, Impaired [Line Items]
Total recorded investment in impaired loans	15,584		15,584		14,261
Unpaid contractual principal balance	17,181		17,181		16,010
Recorded investment with no allowance	13,213		13,213		12,444
Recorded investment with allowance	2,371		2,371		1,817
Related allowance	393		393		370
Average recorded investment	14,403	12,700	13,891	11,184
Interest income recognized	78	64	179	107
Commercial and industrial
Financing Receivable, Impaired [Line Items]
Total recorded investment in impaired loans	12,503		12,503		13,372
Unpaid contractual principal balance	13,183		13,183		14,291
Recorded investment with no allowance	8,749		8,749		9,366
Recorded investment with allowance	3,754		3,754		4,006
Related allowance	1,771		1,771		2,222
Average recorded investment	12,367	8,090	12,623	8,257
Interest income recognized	76	39	181	65
Commercial construction
Financing Receivable, Impaired [Line Items]
Total recorded investment in impaired loans	1,619		1,619		3,364
Unpaid contractual principal balance	1,667		1,667		3,408
Recorded investment with no allowance	1,619		1,619		3,051
Recorded investment with allowance	0		0		313
Related allowance	0		0		28
Average recorded investment	1,622	3,089	2,017	3,032
Interest income recognized	22	37	49	74
Residential
Financing Receivable, Impaired [Line Items]
Total recorded investment in impaired loans	272		272		289
Unpaid contractual principal balance	381		381		388
Recorded investment with no allowance	272		272		289
Recorded investment with allowance	0		0		0
Related allowance	0		0		0
Average recorded investment	279	304	283	306
Interest income recognized	0	0	0	0
Home Equity
Financing Receivable, Impaired [Line Items]
Total recorded investment in impaired loans	494		494		509
Unpaid contractual principal balance	659		659		665
Recorded investment with no allowance	494		494		509
Recorded investment with allowance	0		0		0
Related allowance	0		0		0
Average recorded investment	565	306	552	276
Interest income recognized	0	0	(2)	(2)
Consumer
Financing Receivable, Impaired [Line Items]
Total recorded investment in impaired loans	13		13		1
Unpaid contractual principal balance	14		14		2
Recorded investment with no allowance	0		0		0
Recorded investment with allowance	13		13		1
Related allowance	13		13		$ 1
Average recorded investment	15	20	14	21
Interest income recognized	$ 0	$ 0	$ 0	$ 0

Allowance For Loan Loss - Troub

Allowance For Loan Loss - Troubled Debt Restructures (Details)	3 Months Ended		6 Months Ended
	Jun. 30, 2017USD ($)restructuring	Jun. 30, 2016USD ($)restructuring	Jun. 30, 2017USD ($)restructuring	Jun. 30, 2016USD ($)restructuring	Dec. 31, 2016USD ($)
Financing Receivable, Modifications [Line Items]
Total Troubled Debt Restructure (TDR) loans	$ 23,300,000		$ 23,300,000		$ 27,000,000
TDR loans on accrual status	17,300,000		17,300,000		22,400,000
TDR loans included in non-performing loans	6,000,000		6,000,000		$ 4,600,000
Additional funding commitments on TDR loans	394,000		394,000
Post-modification outstanding recorded investment	$ 4,673,000	$ 6,869,000	$ 8,208,000	$ 7,132,000
Number of restructurings | restructuring	15	9	19	10
Pre-modification outstanding recorded investment	$ 4,562,000	$ 6,887,000	$ 8,095,000	$ 7,151,000
Number of TDRs that defaulted | restructuring	5	2	8	2
Post-modification outstanding recorded investment, TDRs that defaulted	$ 1,457,000	$ 417,000	$ 2,421,000	$ 417,000
Charge-offs associated with TDRs			0	0
Specific reserves allocated to TDRs	376,000	169,000	376,000	169,000
Commercial real estate
Financing Receivable, Modifications [Line Items]
Post-modification outstanding recorded investment	$ 928,000	$ 5,059,000	$ 1,299,000	$ 5,059,000
Number of restructurings | restructuring	3	4	4	4
Pre-modification outstanding recorded investment	$ 929,000	$ 5,093,000	$ 1,304,000	$ 5,093,000
Number of TDRs that defaulted | restructuring	0	0	2	0
Post-modification outstanding recorded investment, TDRs that defaulted	$ 0	$ 0	$ 734,000	$ 0
Commercial and industrial
Financing Receivable, Modifications [Line Items]
Post-modification outstanding recorded investment	$ 2,326,000	$ 1,810,000	$ 5,290,000	$ 2,073,000
Number of restructurings | restructuring	10	5	12	6
Pre-modification outstanding recorded investment	$ 2,213,000	$ 1,794,000	$ 5,165,000	$ 2,058,000
Number of TDRs that defaulted | restructuring	5	2	6	2
Post-modification outstanding recorded investment, TDRs that defaulted	$ 1,457,000	$ 417,000	$ 1,687,000	$ 417,000
Commercial construction
Financing Receivable, Modifications [Line Items]
Post-modification outstanding recorded investment	$ 1,419,000	$ 0	$ 1,619,000	$ 0
Number of restructurings | restructuring	2	0	3	0
Pre-modification outstanding recorded investment	$ 1,420,000	$ 0	$ 1,626,000	$ 0
Number of TDRs that defaulted | restructuring	0	0	0	0
Post-modification outstanding recorded investment, TDRs that defaulted	$ 0	$ 0	$ 0	$ 0
Residential
Financing Receivable, Modifications [Line Items]
Post-modification outstanding recorded investment	$ 0	$ 0	$ 0	$ 0
Number of restructurings | restructuring	0	0	0	0
Pre-modification outstanding recorded investment	$ 0	$ 0	$ 0	$ 0
Number of TDRs that defaulted | restructuring	0	0	0	0
Post-modification outstanding recorded investment, TDRs that defaulted	$ 0	$ 0	$ 0	$ 0
Home Equity
Financing Receivable, Modifications [Line Items]
Post-modification outstanding recorded investment	$ 0	$ 0	$ 0	$ 0
Number of restructurings | restructuring	0	0	0	0
Pre-modification outstanding recorded investment	$ 0	$ 0	$ 0	$ 0
Number of TDRs that defaulted | restructuring	0	0	0	0
Post-modification outstanding recorded investment, TDRs that defaulted	$ 0	$ 0	$ 0	$ 0
Consumer
Financing Receivable, Modifications [Line Items]
Post-modification outstanding recorded investment	$ 0	$ 0	$ 0	$ 0
Number of restructurings | restructuring	0	0	0	0
Pre-modification outstanding recorded investment	$ 0	$ 0	$ 0	$ 0
Number of TDRs that defaulted | restructuring	0	0	0	0
Post-modification outstanding recorded investment, TDRs that defaulted	$ 0	$ 0	$ 0	$ 0
Loan advances with adequate collateral
Financing Receivable, Modifications [Line Items]
Post-modification outstanding recorded investment			367,000	6,337,000
Extended Maturity
Financing Receivable, Modifications [Line Items]
Post-modification outstanding recorded investment			5,739,000	201,000
Payment deferral and extended maturity
Financing Receivable, Modifications [Line Items]
Post-modification outstanding recorded investment			1,086,000	0
Payment Deferral, Interest Only Payments
Financing Receivable, Modifications [Line Items]
Post-modification outstanding recorded investment			$ 1,016,000	$ 594,000

Allowance For Loan Loss - Other

Allowance For Loan Loss - Other Real Estate Owned (Details)	6 Months Ended
	Jun. 30, 2017USD ($)	Jun. 30, 2016USD ($)	Dec. 31, 2016USD ($)
Accounts, Notes, Loans and Financing Receivable [Line Items]
Carry value of OREO	$ 0	$ 0	$ 0
Net gains on sales of OREO	0	$ 0
Consumer mortgage loans in process of foreclosure	$ 301,000		$ 200,000
Other real estate owned
Accounts, Notes, Loans and Financing Receivable [Line Items]
Number of OREO properties added	0	0
OREO fair value adjustment	$ 0	$ 0

Allowance For Loan Loss - Allow

Allowance For Loan Loss - Allowance for Loan Losses (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016	Dec. 31, 2016
Financing Receivable, Allowance for Credit Losses [Line Items]
Allowance for loan losses to total loans ratio	1.51%	1.60%	1.51%	1.60%	1.55%
Allowance for Loan and Lease Losses [Roll Forward]
Beginning Balance	$ 31,683	$ 29,910	$ 31,342	$ 29,008
Provision for loan losses	280	267	405	1,117
Recoveries	130	484	482	634
Less: Charge offs	135	316	271	414
Ending Balance	31,958	30,345	31,958	30,345
Allocated to loans individually evaluated for impairment	2,177	2,099	2,177	2,099
Allocated to loans collectively evaluated for impairment	29,781	28,246	29,781	28,246
Commercial real estate
Allowance for Loan and Lease Losses [Roll Forward]
Beginning Balance	15,294	13,827	14,902	13,514
Provision for loan losses	295	865	611	1,159
Recoveries	56	1	132	20
Less: Charge offs	0	179	0	179
Ending Balance	15,645	14,514	15,645	14,514
Allocated to loans individually evaluated for impairment	393	541	393	541
Allocated to loans collectively evaluated for impairment	15,252	13,973	15,252	13,973
Commercial and industrial
Allowance for Loan and Lease Losses [Roll Forward]
Beginning Balance	11,178	10,278	11,204	9,758
Provision for loan losses	(148)	(714)	(343)	(251)
Recoveries	71	480	343	609
Less: Charge offs	114	131	217	203
Ending Balance	10,987	9,913	10,987	9,913
Allocated to loans individually evaluated for impairment	1,771	990	1,771	990
Allocated to loans collectively evaluated for impairment	9,216	8,923	9,216	8,923
Commercial construction
Allowance for Loan and Lease Losses [Roll Forward]
Beginning Balance	3,364	3,964	3,406	3,905
Provision for loan losses	120	92	78	156
Recoveries	0	0	0	0
Less: Charge offs	0	0	0	5
Ending Balance	3,484	4,056	3,484	4,056
Allocated to loans individually evaluated for impairment	0	550	0	550
Allocated to loans collectively evaluated for impairment	3,484	3,506	3,484	3,506
Residential
Allowance for Loan and Lease Losses [Roll Forward]
Beginning Balance	978	1,077	960	1,061
Provision for loan losses	11	8	29	24
Recoveries	0	0	0	0
Less: Charge offs	0	0	0	0
Ending Balance	989	1,085	989	1,085
Allocated to loans individually evaluated for impairment	0	0	0	0
Allocated to loans collectively evaluated for impairment	989	1,085	989	1,085
Home Equity
Allowance for Loan and Lease Losses [Roll Forward]
Beginning Balance	635	541	634	540
Provision for loan losses	(14)	9	(14)	15
Recoveries	1	2	2	2
Less: Charge offs	0	0	0	5
Ending Balance	622	552	622	552
Allocated to loans individually evaluated for impairment	0	0	0	0
Allocated to loans collectively evaluated for impairment	622	552	622	552
Consumer
Allowance for Loan and Lease Losses [Roll Forward]
Beginning Balance	234	223	236	230
Provision for loan losses	16	7	44	14
Recoveries	2	1	5	3
Less: Charge offs	21	6	54	22
Ending Balance	231	225	231	225
Allocated to loans individually evaluated for impairment	13	18	13	18
Allocated to loans collectively evaluated for impairment	$ 218	$ 207	$ 218	$ 207

Deposits (Details)

Deposits (Details) - USD ($) $ in Thousands		Jun. 30, 2017	Dec. 31, 2016
Deposits [Abstract]
Noninterest-bearing demand deposits		$ 700,415	$ 646,115
Interest bearing checking		406,077	372,696
Savings		199,018	178,637
Money market		793,131	844,216
Certificates of deposit, $250,000 or Less,		128,346	125,580
Certificates of deposit more than $250,000		39,335	42,315
Total non-brokered deposits		2,266,322	2,209,559
Brokered deposits	[1]	87,460	59,362
Deposits		2,353,782	2,268,921
Reciprocal deposits		$ 252,400	$ 281,600
[1]	Primarily brokered CDs $250,000 and under

Borrowed Funds and Subordinat48

Borrowed Funds and Subordinated Debt (Details) - USD ($)	6 Months Ended
	Jun. 30, 2017	Dec. 31, 2016	Jan. 31, 2015
Debt Instrument [Line Items]
Borrowed Funds	$ 44,255,000	$ 10,671,000
Subordinated debt	$ 14,841,000	$ 14,834,000
Fixed-to Floating Rate Subordinated Notes
Debt Instrument [Line Items]
Subordinated debt			$ 15,000,000
Subordinated debt, term	15 years
Subordinated debt, rate	6.00%

Derivatives and Hedging Activ49

Derivatives and Hedging Activities (Details)	Jun. 30, 2017USD ($)instrumentloan	Dec. 31, 2016USD ($)instrumentloan	Jun. 30, 2017USD ($)instrumentloan	Jun. 30, 2016USD ($)
Derivative [Line Items]
Number of Participation Loans with Swap Contingent Liabilities | loan	2	2	2
Interest rate swap
Derivative [Line Items]
Gain (Loss) on Interest Rate Swaps			$ 0	$ 0
Number of Interest Rate Swaps | instrument	6	4	6
Aggregate notional value of interest-rate swaps	$ 29,800,000	$ 26,700,000	$ 29,800,000
Fair Value of Interest-Rate Swap Assets	459,000	610,000	459,000
Fair Value of Interest-Rate Swap Liability	459,000	610,000	459,000
Counterparty Credit Risk Exposure on Interest Rate Swaps	459,000	610,000
Gross Amount Interest Rate Swap Asset Recognized	459,000	610,000	459,000
Net Asset Amount, Interest Rate Swap	459,000	610,000	459,000
Gross Amount Interest Rate Swap Liability Recognized	459,000	610,000	459,000
Collateral posted	0	0	0
Net Liability Amount, Interest Rate Swap	$ 459,000	$ 610,000	$ 459,000

Stockholder's Equity (Details)

Stockholder's Equity (Details) - USD ($)	Jun. 23, 2016	Jun. 30, 2016	Jun. 30, 2017	May 01, 2017	Dec. 31, 2016
Class of Stock [Line Items]
Common stock, shares authorized			40,000,000	20,000,000
Preferred stock, shares authorized			1,000,000		1,000,000
Preferred stock, par value			$ 0.01		$ 0.01
Unvested participating restricted stock awards			126,770		141,580
Shareholder subscription rights and community offering, price per share		$ 21.50
Maximum amount that was available to be raised under shelf registration		$ 40,000,000
Shares issued in shareholder subscription rights and community offering	930,232
Gross proceeds from shareholder subscription rights and community offering		20,000,000
Net proceeds from shareholder subscription rights offering and community offering		$ 19,700,000
Series A Preferred Stock
Class of Stock [Line Items]
Price per one one-hundredth of a share			$ 52
Minimum acquisition percentage to trigger the exercise of the right to purchase			10.00%
Amount of a share allowed to be purchased under right to purchase			0.01

Supplemental Retirement Plan 51

Supplemental Retirement Plan and Other Postretirement Benefit Obligations (Details) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2017USD ($)officer	Jun. 30, 2016USD ($)	Jun. 30, 2017USD ($)officer	Jun. 30, 2016USD ($)
Supplemental Employee Retirement Plan
Defined Benefit Plan Disclosures [Line Items]
Number of Active Executive Officers under Plan | officer	2		2
Number of Former Executive Officers under Plan | officer	1		1
Term of SERP benefits			20 years
Net Periodic Benefit Cost	$ 29	$ 31	$ 58	$ 62
Benefits Paid	69	69	138	138
Remaining accrual for benefit obligation in current year			58
Supplemental Life Insurance
Defined Benefit Plan Disclosures [Line Items]
Net Periodic Benefit Cost	20	18	40	37
Service Cost	(3)	(3)	(6)	(5)
Interest Cost	$ 23	$ 21	$ 46	$ 42

Stock-Based Compensation Summar

Stock-Based Compensation Summary Information for Options Granted (Details) - $ / shares	6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock option awards granted	15,009	31,047
Stock options
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Term in years	10 years	10 years
Expected volatility	40.00%	42.00%
Market price on date of grant	$ 30.46	$ 21.91
Per share weighted average fair value	$ 11.34	$ 7.91
Weighted Average | Stock options
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Expected dividend yield	2.09%	3.02%
Expected life in years	7 years	7 years
Risk-free interest rate	2.35%	1.91%
Fair Value as a percentage of market value at grant date	37.00%	36.00%

Stock-Based Compensation Stock

Stock-Based Compensation Stock Options, Stock Awards, and Stock in Lieu of Directors' Fees (Details) $ / shares in Units, $ in Thousands	1 Months Ended	3 Months Ended		6 Months Ended		12 Months Ended
	Jan. 31, 2017shares	Jun. 30, 2017USD ($)plansshares	Jun. 30, 2016USD ($)	Jun. 30, 2017USD ($)plansshares	Jun. 30, 2016USD ($)	Dec. 31, 2016USD ($)	Jan. 04, 2016$ / shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of Individual Stock Incentive Plans | plans		2		2
Shares remaining available for future grants | shares		440,470		440,470
Stock-based compensation expense		$ 496	$ 462	$ 820	$ 905
Number of shares issued in lieu of cash to directors | shares	12,992
Fair market share price | $ / shares							$ 22.04
Stock options
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock-based compensation expense		41	63	$ 103	142
Restricted stock | Employee
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Award vesting period				4 years
Restricted stock | Director
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Award vesting period				2 years
Restricted stock and common stock
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock-based compensation expense		384	323	$ 571	617
Common stock in lieu of cash | Director
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock-based compensation expense		$ 71	$ 76	$ 146	$ 146	$ 286
Vesting, Year Two | Stock options
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Options granted, vesting percentage				50.00%	50.00%
Vesting, Year Four | Stock options
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Options granted, vesting percentage				50.00%	50.00%

Stock-Based Compensation Restri

Stock-Based Compensation Restricted Stock Grants (Details) - Restricted stock - $ / shares	6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock awards in period	48,820	62,429
Weighted Average Grant Date Fair Value, Stock Awards	$ 30.46	$ 21.90
Director | Two year vesting
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock awards in period	6,944	9,060
Employee | Four year vesting
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock awards in period	16,253	18,298
Employee | Performance-based vesting
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock awards in period	25,623	35,071

Earnings Per Share Earnings Per

Earnings Per Share Earnings Per Share (Details) - shares	Jun. 23, 2016	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016
Earnings Per Share [Abstract]
Shares issued in shareholder subscription rights and community offering	930,232
Basic weighted average common shares outstanding		11,572,430	10,561,680	11,540,796	10,483,396
Dilutive shares		80,259	68,220	84,916	67,446
Diluted weighted average common shares outstanding		11,652,689	10,629,900	11,625,712	10,550,842
Antidilutive Shares Excluded from EPS				15,009

Fair Value Measurements - Recur

Fair Value Measurements - Recurring and Nonrecurring Basis (Details) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2017	Dec. 31, 2016
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Specific allowance for collateral dependent impaired loans	$ 1,600	$ 1,900
Financial Standby Letter of Credit
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Amortization period of estimated fair value on standby letters of credit	1 year
Fair Value, Measurements, Recurring | Fair Value, Inputs, Level 1 | Interest rate swap
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair value of liabilities	$ 0	0
Fair Value, Measurements, Recurring | Fair Value, Inputs, Level 1 | Debt securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair value of assets	0	0
Fair Value, Measurements, Recurring | Fair Value, Inputs, Level 1 | Equity investments
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair value of assets	6,187	12,643
Fair Value, Measurements, Recurring | Fair Value, Inputs, Level 1 | FHLB Stock
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair value of assets	0	0
Fair Value, Measurements, Recurring | Fair Value, Inputs, Level 1 | Interest rate swap
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair value of assets	0	0
Fair Value, Measurements, Recurring | Fair Value, Inputs, Level 2 | Interest rate swap
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair value of liabilities	459	610
Fair Value, Measurements, Recurring | Fair Value, Inputs, Level 2 | Debt securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair value of assets	381,818	362,147
Fair Value, Measurements, Recurring | Fair Value, Inputs, Level 2 | Equity investments
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair value of assets	0	0
Fair Value, Measurements, Recurring | Fair Value, Inputs, Level 2 | FHLB Stock
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair value of assets	0	0
Fair Value, Measurements, Recurring | Fair Value, Inputs, Level 2 | Interest rate swap
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair value of assets	459	610
Fair Value, Measurements, Recurring | Fair Value, Inputs, Level 3 | Interest rate swap
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair value of liabilities	0	0
Fair Value, Measurements, Recurring | Fair Value, Inputs, Level 3 | Debt securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair value of assets	0	0
Fair Value, Measurements, Recurring | Fair Value, Inputs, Level 3 | Equity investments
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair value of assets	0	0
Fair Value, Measurements, Recurring | Fair Value, Inputs, Level 3 | FHLB Stock
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair value of assets	4,364	2,094
Fair Value, Measurements, Recurring | Fair Value, Inputs, Level 3 | Interest rate swap
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair value of assets	0	0
Fair Value, Measurements, Nonrecurring | Fair Value, Inputs, Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Impaired loans (collateral dependent), Fair Value	0	0
Fair Value, Measurements, Nonrecurring | Fair Value, Inputs, Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Impaired loans (collateral dependent), Fair Value	0	0
Fair Value, Measurements, Nonrecurring | Fair Value, Inputs, Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Impaired loans (collateral dependent), Fair Value	3,919	3,481
Fair Value | Fair Value, Measurements, Recurring | Interest rate swap
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair value of liabilities	459	610
Fair Value | Fair Value, Measurements, Recurring | Debt securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair value of assets	381,818	362,147
Fair Value | Fair Value, Measurements, Recurring | Equity investments
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair value of assets	6,187	12,643
Fair Value | Fair Value, Measurements, Recurring | FHLB Stock
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair value of assets	4,364	2,094
Fair Value | Fair Value, Measurements, Recurring | Interest rate swap
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair value of assets	459	610
Fair Value | Fair Value, Measurements, Nonrecurring
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Impaired loans (collateral dependent), Fair Value	$ 3,919	$ 3,481

Fair Value Measurements - Quant

Fair Value Measurements - Quantitative (Details) - Fair Value, Inputs, Level 3 - USD ($) $ in Thousands		6 Months Ended
		Jun. 30, 2017	Dec. 31, 2016
Fair Value, Measurements, Recurring | FHLB Stock
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Fair value of assets		$ 4,364	$ 2,094
Fair Value, Measurements, Recurring | FHLB Stock | FHLB par stated value
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Fair value of assets		4,364
Fair Value, Measurements, Nonrecurring
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Impaired loans (collateral dependent), Fair Value		3,919	$ 3,481
Fair Value, Measurements, Nonrecurring | Impaired loans (collateral dependent) | Appraisal of collateral
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Impaired loans (collateral dependent), Fair Value	[1]	$ 3,919
Fair Value, Measurements, Nonrecurring | Impaired loans (collateral dependent) | Appraisal of collateral | Minimum
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Unobservable Input Value or Range		5.00%
Fair Value, Measurements, Nonrecurring | Impaired loans (collateral dependent) | Appraisal of collateral | Maximum
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Unobservable Input Value or Range		50.00%
[1]	Appraisals may be adjusted by management for qualitative factors such as economic conditions and estimated liquidation expenses.

Fair Value Measurements - Balan

Fair Value Measurements - Balance Sheet Grouping (Details) - USD ($) $ in Thousands	Jun. 30, 2017	Dec. 31, 2016
Carrying Amount
Financial assets:
Loans held for sale	$ 856	$ 1,569
Loans, net	2,082,442	1,991,387
Financial liabilities:
Borrowed Funds	44,255	10,671
Subordinated debt	14,841	14,834
Carrying Amount | Certificates of Deposit
Financial liabilities:
Certificates of deposit	255,141	227,257
Fair Value
Financial assets:
Loans held for sale	857	1,569
Loans, net	2,089,802	1,997,887
Financial liabilities:
Borrowed Funds	44,249	10,670
Subordinated debt	14,246	14,011
Fair Value | Certificates of Deposit
Financial liabilities:
Certificates of deposit	254,349	226,536
Fair Value, Inputs, Level 1
Financial assets:
Loans held for sale	0	0
Loans, net	0	0
Financial liabilities:
Borrowed Funds	0	0
Subordinated debt	0	0
Fair Value, Inputs, Level 1 | Certificates of Deposit
Financial liabilities:
Certificates of deposit	0	0
Fair Value, Inputs, Level 2
Financial assets:
Loans held for sale	857	1,569
Loans, net	0	0
Financial liabilities:
Borrowed Funds	44,249	10,670
Subordinated debt	0	0
Fair Value, Inputs, Level 2 | Certificates of Deposit
Financial liabilities:
Certificates of deposit	254,349	226,536
Fair Value, Inputs, Level 3
Financial assets:
Loans held for sale	0	0
Loans, net	2,089,802	1,997,887
Financial liabilities:
Borrowed Funds	0	0
Subordinated debt	14,246	14,011
Fair Value, Inputs, Level 3 | Certificates of Deposit
Financial liabilities:
Certificates of deposit	$ 0	$ 0