10-Q

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

Form 10-Q

QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934

For the quarterly period ended March 31, 2016

Commission File Number:  001-33912

Enterprise Bancorp, Inc.

(Exact name of registrant as specified in its charter)

Massachusetts	04-3308902
(State or other jurisdiction of	(I.R.S. Employer Identification No.)
incorporation or organization)
222 Merrimack Street, Lowell, Massachusetts	01852
(Address of principal executive offices)	(Zip code)

(978) 459-9000

(Registrant's telephone number, including area code)

Indicate by check mark whether the registrant (1) has filed all reports required to be filed by Section 13 or 15(d) of the Securities Exchange Act of 1934 during the preceding 12 months (or for such shorter period that the registrant was required to file such reports), and (2) has been subject to such filing requirements for the past 90 days.  x Yes   o  No

Indicate by check mark whether the registrant has submitted electronically and posted on its corporate Web site, if any, every Interactive Data File required to be submitted and posted pursuant to Rule 405 of Regulation S-T (§232.405 of this chapter) during the preceding 12 months (or for such shorter period that the registrant was required to submit and post such files)  x Yes  o  No

Indicate by check mark whether the registrant is a large accelerated filer, an accelerated filer, a non-accelerated filer or a smaller reporting company. See definition for "large accelerated filer," "accelerated filer" and "smaller reporting company" in Rule 12b-2 of the Exchange Act (Check one): 

Large accelerated filer o	Accelerated filer x
Non-accelerated filer o	Smaller reporting company o

Indicate by check mark whether the registrant is a shell company (as defined in Rule 12b-2 of the Exchange Act).  ¨  Yes  x  No

As of May 2, 2016, there were 10,474,757 shares of the issuer's common stock outstanding- Par Value $0.01 per share

ENTERPRISE BANCORP, INC.

INDEX

		Page Number
	Cover Page	1
	Index	2
	PART I - FINANCIAL INFORMATION
Item 1	Financial Statements	3
	Consolidated Balance Sheets - March 31, 2016 and December 31, 2015	3
	Consolidated Statements of Income -Three months ended March 31, 2016 and 2015	4
	Consolidated Statements of Comprehensive Income -Three months ended March 31, 2016 and 2015	5
	Consolidated Statement of Changes in Stockholders’ Equity - Three months ended March 31, 2016	6
	Consolidated Statements of Cash Flows - Three months ended March 31, 2016 and 2015	7
	Notes to Unaudited Consolidated Interim Financial Statements	8
Item 2	Management’s Discussion and Analysis of Financial Condition and Results of Operations	35
Item 3	Quantitative and Qualitative Disclosures About Market Risk	56
Item 4	Controls and Procedures	57
	PART II - OTHER INFORMATION
Item 1	Legal Proceedings	58
Item 1A	Risk Factors	58
Item 2	Unregistered Sales of Equity Securities and Use of Proceeds	58
Item 3	Defaults Upon Senior Securities	58
Item 4	Mine Safety Disclosures	58
Item 5	Other Information	58
Item 6	Exhibits	59
	Signature page	60

2

PART I-FINANCIAL INFORMATION

Item 1 - Financial Statements

ENTERPRISE BANCORP, INC.

Consolidated Balance Sheets

(Unaudited)

(Dollars in thousands)	March 31, 2016		December 31, 2015
Assets
Cash and cash equivalents:
Cash and due from banks	$	34,018	$	32,318
Interest-earning deposits	24,912		19,177
Total cash and cash equivalents	58,930		51,495
Investment securities at fair value	304,946		300,358
Federal Home Loan Bank stock	2,793		3,050
Loans held for sale	770		1,709
Loans, less allowance for loan losses of $29,910 at March 31, 2016 and $29,008 at December 31, 2015	1,834,782		1,830,954
Premises and equipment, net	31,984		30,553
Accrued interest receivable	8,393		7,790
Deferred income taxes, net	12,962		14,111
Bank-owned life insurance	28,209		28,018
Prepaid income taxes	—		57
Prepaid expenses and other assets	15,207		11,780
Goodwill	5,656		5,656
Total assets	$	2,304,632	$	2,285,531
Liabilities and Stockholders' Equity
Liabilities
Deposits	$	2,087,737	$	2,018,148
Borrowed funds	671		53,671
Subordinated debt	14,825		14,822
Accrued expenses and other liabilities	13,497		18,287
Income taxes payable	1,551		—
Accrued interest payable	266		276
Total liabilities	$	2,118,547	$	2,105,204
Commitments and Contingencies
Stockholders' Equity
Preferred stock, $0.01 par value per share; 1,000,000 shares authorized; no shares issued	—		—
Common stock $0.01 par value per share; 20,000,000 shares authorized; 10,473,738 shares issued and outstanding at March 31, 2016 (including 155,421 shares of unvested participating restricted awards), 10,377,787 shares issued and outstanding at December 31, 2015 (including 144,717 shares of unvested participating restricted awards)	105		104
Additional paid-in-capital	61,927		61,008
Retained earnings	119,904		116,941
Accumulated other comprehensive income	4,149		2,274
Total stockholders' equity	$	186,085	$	180,327
Total liabilities and stockholders' equity	$	2,304,632	$	2,285,531

See the accompanying notes to the unaudited consolidated interim financial statements.

3

ENTERPRISE BANCORP, INC.

Consolidated Statements of Income

(Unaudited)

	Three months ended March 31,
(Dollars in thousands, except per share data)	2016		2015
Interest and dividend income:
Loans and loans held for sale	$	20,881	$	18,582
Investment securities	1,540		1,225
Other interest-earning assets	44		32
Total interest and dividend income	22,465		19,839
Interest expense:
Deposits	1,088		992
Borrowed funds	63		21
Subordinated debt	231		372
Total interest expense	1,382		1,385
Net interest income	21,083		18,454
Provision for loan losses	850		625
Net interest income after provision for loan losses	20,233		17,829
Non-interest income:
Investment advisory fees	1,104		1,177
Deposit and interchange fees	1,242		1,154
Income on bank-owned life insurance, net	191		100
Net gains on sales of investment securities	2		900
Gains on sales of loans	89		156
Other income	578		538
Total non-interest income	3,206		4,025
Non-interest expense:
Salaries and employee benefits	10,485		9,581
Occupancy and equipment expenses	1,813		1,960
Technology and telecommunications expenses	1,423		1,417
Advertising and public relations expenses	679		730
Audit, legal and other professional fees	488		359
Deposit insurance premiums	326		293
Supplies and postage expenses	229		258
Investment advisory and custodial expenses	89		46
Other operating expenses	1,337		1,566
Total non-interest expense	16,869		16,210
Income before income taxes	6,570		5,644
Provision for income taxes	2,257		2,024
Net income	$	4,313	$	3,620
Basic earnings per share	$	0.41	$	0.35
Diluted earnings per share	$	0.41	$	0.35
Basic weighted average common shares outstanding	10,405,112		10,243,044
Diluted weighted average common shares outstanding	10,471,784		10,310,474

See the accompanying notes to the unaudited consolidated interim financial statements.

4

ENTERPRISE BANCORP, INC.

Consolidated Statements of Comprehensive Income

(Unaudited)

	Three months ended March 31,
(Dollars in thousands)	2016			2015
Net income	$	4,313		$	3,620
Other comprehensive income, net of taxes:
Gross change in unrealized holding gains on investments arising during the period	3,026			2,107
Income tax expense	(1,150		)	(724		)
Net unrealized holding gains, net of tax	1,876			1,383
Less: Reclassification adjustment for net gains included in net income
Net realized gains on sales of securities during the period	2			900
Income tax expense	(1		)	(314		)
Reclassification adjustment for gains realized, net of tax	1			586
Total other comprehensive income	1,875			797
Comprehensive income	$	6,188		$	4,417

See the accompanying notes to the unaudited consolidated interim financial statements.

5

ENTERPRISE BANCORP, INC.

Consolidated Statement of Changes in Stockholders' Equity

(Unaudited)

(Dollars in thousands, except per share data)	Common Stock		Additional Paid-in Capital		Retained Earnings			Accumulated Other Comprehensive Income		Total Stockholders' Equity
Balance at December 31, 2015	$	104	$	61,008	$	116,941		$	2,274	$	180,327
Net income					4,313					4,313
Other comprehensive income, net								1,875		1,875
Common stock dividend paid ($0.13 per share)					(1,350		)			(1,350		)
Common stock issued under dividend reinvestment plan	—		336							336
Common stock issued other	—		16							16
Stock-based compensation, net	1		422							423
Stock options exercised, net	—		145							145
Balance at March 31, 2016	$	105	$	61,927	$	119,904		$	4,149	$	186,085

See the accompanying notes to the unaudited consolidated interim financial statements.

6

ENTERPRISE BANCORP, INC.

Consolidated Statements of Cash Flows

(Unaudited)

	Three months ended March 31,
(Dollars in thousands)	2016			2015
Cash flows from operating activities:
Net income	$	4,313		$	3,620
Adjustments to reconcile net income to net cash (used in) provided by operating activities:
Provision for loan losses	850			625
Depreciation and amortization	1,425			1,389
Stock-based compensation expense	443			488
Mortgage loans originated for sale	(3,273		)	(6,729		)
Proceeds from mortgage loans sold	4,301			8,131
Net gains on sales of loans	(89		)	(156		)
Net gains on sales of OREO	—			(154		)
Net gains on sales of investments	(2		)	(900		)
Income on bank-owned life insurance, net	(191		)	(100		)
Changes in:
Accrued interest receivable	(603		)	(268		)
Prepaid expenses and other assets	(3,580		)	6,807
Deferred income taxes	—			74
Accrued expenses and other liabilities	(662		)	(228		)
Subordinated debt issuance costs	3			(190		)
Accrued interest payable	(10		)	(282		)
Net cash provided by operating activities	2,925			12,127
Cash flows from investing activities:
Proceeds from sales of investment securities available-for-sale	306			10,151
Net proceeds (purchases) from FHLB capital stock	257			(882		)
Proceeds from maturities, calls and pay-downs of investment securities	4,785			6,443
Purchase of investment securities	(9,210		)	(9,877		)
Net increase in loans	(4,678		)	(9,459		)
Additions to premises and equipment, net	(3,006		)	(786		)
Proceeds from OREO sales and payments	—			901
Proceeds from bank-owned life insurance	405			—
Net cash used in investing activities	(11,141		)	(3,509		)
Cash flows from financing activities:
Net increase in deposits	69,589			96,748
Net decrease in borrowed funds	(53,000		)	(58,000		)
Repayment of subordinated debt	—			(10,825		)
Proceeds from issuance of subordinated debt	—			15,000
Cash dividends paid	(1,350		)	(1,279		)
Proceeds from issuance of common stock	352			368
Exercise of stock options, net of repurchases for tax withholdings and tax benefit on stock options and restricted stock	60			384
Net cash provided by financing activities	15,651			42,396
Net increase in cash and cash equivalents	7,435			51,014
Cash and cash equivalents at beginning of period	51,495			40,146
Cash and cash equivalents at end of period	$	58,930		$	91,160
Supplemental financial data:
Cash Paid For: Interest	$	1,392		$	1,667
Cash Paid For: Income Taxes	636			587
Supplemental schedule of non-cash investing activity:
Net purchases of investment securities not yet settled	100			2,237

 See accompanying notes to the unaudited consolidated interim financial statements.

7

ENTERPRISE BANCORP, INC.

Notes to the Unaudited Consolidated Interim Financial Statements

(1) 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, 2015 audited consolidated financial statements and notes thereto contained in the 2015 Annual Report on Form 10-K of Enterprise Bancorp, Inc. (the "Company" or "Enterprise"), a Massachusetts corporation, as filed with the Securities and Exchange Commission (the "SEC") on March 15, 2016.  The Company has not changed its accounting policies from those disclosed in its 2015 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.

The Company has 22 full service branches serving the greater Merrimack Valley and North Central regions of Massachusetts and Southern New Hampshire. The Company also plans to open its second Nashua, NH branch in the second quarter of 2016. Through the Bank and its subsidiaries, the Company offers a range of commercial and consumer loan products, and deposit and cash management services. The Company also offers 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.

Prior to the end of March 2015, pursuant to the Accounting Standards Codification ("ASC") Topic 810 "Consolidation of Variable Interest Entities," issued by the Financial Accounting Standards Board ("FASB"), the Company carried Junior Subordinated Debentures as a liability on its consolidated financial statements, along with the related interest expense. The debentures were issued by a statutory business trust (the "Trust") created by the Company in March 2000 under the laws of the State of Delaware, and the trust preferred securities issued by the Trust, and the related non-interest expense, were excluded from the Company's consolidated financial statements. In March 2015, the Company redeemed in full the Junior Subordinated Debentures, which in turn allowed the Trust to redeem in full the trust preferred securities. The Company also dissolved the Trust in April 2015. See Note 6, "Borrowed Funds and Subordinated Debt," below for further information on the Company's subordinated debt.

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 accounting principles generally accepted in the United States ("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.

8

Table of Contents ENTERPRISE BANCORP, INC. Notes to the Unaudited Consolidated Interim Financial Statements

(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 2015 Annual Report on Form 10-K, the three most significant areas in which management applies critical assumptions and estimates that are particularly susceptible to change relate to the determination 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 2015 Annual Report on Form 10-K for significant accounting policies. The Company has not changed its significant accounting policies from those disclosed in its 2015 Annual Report filed on Form 10-K.

(c) Reporting 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 Accounting Standards Update ("ASU") No. 2013-02, Comprehensive Income (Topic 220): Reporting Amounts Reclassified Out of Accumulated Other Comprehensive Income, 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."

(d) Restricted Investments

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 the Company's borrowing relationship from the FHLB.  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.

In conjunction with the other-than-temporary-impairment ("OTTI") review on available-for-sale investments (See Note 2, "Investments," for additional information), management also regularly reviews its holdings of FHLB stock for 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.

(e) 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 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.

9

Table of Contents ENTERPRISE BANCORP, INC. Notes to the Unaudited Consolidated Interim Financial Statements

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 March 31, 2016.  The Company is subject to U.S. federal and state income tax examinations by taxing authorities for the 2012 through 2015 tax years.

(f) Subsequent Events

Although the Company believes its current capital is adequate to support ongoing operations, on April 21, 2016, the Company commenced a subscription rights offering to the Company’s stockholders, together with a supplemental community offering, with the intention of raising up to $10 million in gross proceeds. The Company has the ability to accept oversubscription requests in the rights offering and/or to facilitate sales of shares to new investors in the community offering resulting in gross proceeds of up to $12 million. All shares sold in the offerings will be sold at a per share price of $21.50. Subject to early termination or extension at the sole discretion of the Company, the rights offering is scheduled to expire on May 27, 2016 and the supplemental community offering is scheduled to expire on June 10, 2016. The Company intends to use the net proceeds from the offerings to support future asset growth and for various corporate purposes. The Company is using its existing shelf registration statement in connection with the offerings.

(g) Recent Accounting Pronouncements

In April 2015, the Financial Accounting Standards Board ("FASB") issued ASU No. 2015-03, Imputation of Interest (Subtopic 835-30): Simplifying the Presentation of Debt Issuance Costs. The amendments in this ASU require that debt issuance costs related to a recognized debt liability be presented in the balance sheet as a direct deduction from the carrying amount of that debt liability, consistent with debt discounts. The recognition and measurement guidance for debt issuance costs are not affected by the amendments in this ASU. Entities are required to apply the new guidance on a retrospective basis, wherein the balance sheet of each individual period presented should be adjusted to reflect the period-specific effects of applying the new guidance. For public business entities, the amendments are effective for financial statements issued for fiscal years beginning after December 15, 2015, and interim periods within those fiscal years. Early adoption of the amendments is permitted for financial statements that have not been previously issued. The Company early adopted this ASU as of January 1, 2015 in relation to the Company's Fixed-to-Floating Rate Subordinated Notes issued in January 2015. This adoption did not have a material impact on the Company's financial statements or results of operations.

In January 2015, the FASB issued Accounting Standards Update (ASU) 2015-01, "Income Statement-Extraordinary and Unusual Items (Subtopic 225-20): Simplifying Income Statement Presentation by Eliminating the Concept of Extraordinary Items." This ASU will align more closely GAAP income statement presentation guidance with International Audit Standards (IAS) 1, Presentation of Financial Statements, which prohibits the presentation and disclosure of extraordinary items. The amendments in this update are effective for fiscal years, and interim periods within those fiscal years, beginning after December 15, 2015. The adoption of this standard did not have an impact on the Company's financial statements. 

For information regarding recent accounting pronouncements not yet adopted by the Company, see Item 2, "Management's Discussion and Analysis of Financial Condition and Results of Operations," under the heading "Recent Accounting Pronouncements Not Yet Adopted."

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Table of Contents ENTERPRISE BANCORP, INC. Notes to the Unaudited Consolidated Interim Financial Statements

(2)Investments

The amortized cost and carrying values of investment securities at the dates specified are summarized as follows:

	March 31, 2016
(Dollars in thousands)	Amortized cost		Unrealized gains		Unrealized losses		Fair Value
Federal agency obligations (1)	$	78,640	$	1,097	$	19	$	79,718
Residential federal agency MBS (1)	72,069		844		184		72,729
Commercial federal agency MBS(1)	27,499		286		—		27,785
Municipal securities	97,040		2,928		43		99,925
Corporate bonds	10,284		128		29		10,383
Certificates of deposits (2)	1,943		17		—		1,960
Total fixed income securities	287,475		5,300		275		292,500
Equity investments	10,969		1,879		402		12,446
Total available-for-sale securities, at fair value	$	298,444	$	7,179	$	677	$	304,946

	December 31, 2015
(Dollars in thousands)	Amortized cost		Unrealized gains		Unrealized losses		Fair Value
Federal agency obligations(1)	$	78,626	$	352	$	153	$	78,825
Residential federal agency MBS(1)	75,105		406		648		74,863
Commercial federal agency MBS(1)	23,908		—		363		23,545
Municipal securities	96,189		2,357		35		98,511
Corporate bonds	10,257		44		95		10,206
Certificates of deposits(2)	2,753		—		2		2,751
Total fixed income securities	286,838		3,159		1,296		288,701
Equity investments	10,043		1,966		352		11,657
Total available-for-sale securities, at fair value	$	296,881	$	5,125	$	1,648	$	300,358

__________________________________________

(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 federal agency MBS category were collateralized mortgage obligations (“CMOs”) totaling $20.0 million and $20.8 million at March 31, 2016 and December 31, 2015 respectively. All of the commercial MBS investments held by the Company were CMOs.

At March 31, 2016, the equity portfolio consisted primarily of investments in a diversified group of mutual funds, with a portion of the portfolio (approximately 16%) invested in individual common stock of entities in the financial services industry.

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.

The net unrealized gain or loss in the Company's fixed income portfolio fluctuates as market interest rates rise and fall.  Due to the fixed rate nature of this portfolio, as market rates fall the value of the portfolio rises, and as market rates rise, the value

11

Table of Contents ENTERPRISE BANCORP, INC. Notes to the Unaudited Consolidated Interim Financial Statements

of the portfolio declines.  The unrealized gains or losses on fixed income investments will also decline as the securities approach maturity, or if the issuer is credit impaired. Unrealized gains or losses will be recognized in the statements of income if the securities are sold. However, if an unrealized loss on a fixed income investment 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.

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.

Management regularly reviews the portfolio for securities with unrealized losses that are other-than-temporarily impaired.  During the three months endedMarch 31, 2016 and 2015, the Company did not record any fair value impairment charges on its investments. As of March 31, 2016, there were a total of 36 investments (fixed income and equity, excluding CDs), with a fair market value of $28.6 million, in an unrealized loss position totaling $677 thousand, including 9 investments in an unrealized loss position totaling $194 thousand that have been temporarily impaired for 12 months or longer. Management attributes these unrealized losses to increases in market yields compared to the yields at the time the investments were purchased by the Company and the impact of market value fluctuations on the equity portion of our portfolio. Management does not consider these investments to be other-than-temporarily impaired at March 31, 2016, because (1) the decline in market value is not attributable to credit quality for fixed income securities or a fundamental deterioration in the equity fund or issuers, and (2) the Company does not intend to, 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.  

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 fixed income investments 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 March 31, 2016, 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.

As noted in the table above, a small portion of the fixed income portfolio is also invested in short-term CDs purchased on the open market; none of which were in an unrealized loss position at March 31, 2016.

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The contractual maturity distribution at March 31, 2016 of total fixed income investments was as follows:

	Within One Year				After One, But Within  Five Years				After Five, But Within Ten Years				After Ten Years
	Amortized Cost		Yields		Amortized Cost		Yields		Amortized Cost		Yields		Amortized Cost		Yields
At amortized cost:
Federal agency obligations	$	7,035	0.91	%	$	62,054	1.59	%	$	9,551	2.22	%	$	—	—	%
Residential federal agency MBS	—		—	%	3,101		3.17	%	1,242		1.91	%	67,726		2.13	%
Commercial federal agency MBS	—		—	%	—		—	%	27,499		2.26	%	—		—	%
Municipal securities	6,233		2.31	%	25,813		3.58	%	33,612		3.65	%	31,382		3.85	%
Corporate bonds	528		1.33	%	5,175		2.15	%	4,581		2.94	%	—		—	%
CDs	993		0.34	%	950		2.13	%	—		—	%	—		—	%
Total fixed income securities	$	14,789	1.48	%	$	97,093	2.21	%	$	76,485	2.90	%	$	99,108	2.67	%
At fair value:
Total fixed income securities	$	14,841			$	98,726			$	78,292			$	100,641

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 carrying value of fixed income investments above are callable securities, comprised of municipal securities and corporate bonds totaling $49.4 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 deposit 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 $290.5 million at March 31, 2016. 

See Note 11, "Fair Value Measurements," below for further information regarding the Company's fair value measurements for available-for-sale securities.

(3) 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 loan 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.

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Major classifications of loans at the periods indicated were as follows:

(Dollars in thousands)	March 31, 2016			December 31, 2015
Commercial real estate	$	936,907		$	936,921
Commercial and industrial	456,436			458,553
Commercial construction	207,214			202,993
Total commercial loans	1,600,557			1,598,467
Residential mortgages	170,585			169,188
Home equity loans and lines	84,665			83,373
Consumer	10,539			10,747
Total retail loans	265,789			263,308
Gross loans	1,866,346			1,861,775
Deferred loan origination fees, net	(1,654		)	(1,813		)
Total loans	1,864,692			1,859,962
Allowance for loan losses	(29,910		)	(29,008		)
Net loans	$	1,834,782		$	1,830,954

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 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 commercial 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

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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.  The balances participated out to other institutions are not carried as assets on the Company's financial statements.  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.  The Company performs an independent credit analysis of each commitment and a review of the participating institution prior to participation in the loan.  Loans originated by other banks in which the Company is a participating institution amounted to $59.6 million at March 31, 2016 and $62.3 million at December 31, 2015.

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 be 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 assessed 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 also be fixed for three to fifteen years.

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 appraised value of the property securing the loan.  Home equity lines generally have interest rates that adjust monthly based on changes in the 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.

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Table of Contents ENTERPRISE BANCORP, INC. Notes to the Unaudited Consolidated Interim Financial Statements

Loans serviced for others

At March 31, 2016 and December 31, 2015, the Company was servicing residential mortgage loans owned by investors amounting to $18.2 million and $18.5 million, respectively.  Additionally, the Company was servicing commercial loans participated out to various other institutions amounting to $53.1 million and $52.7 million at March 31, 2016 and December 31, 2015, respectively. See the discussion above for further information regarding commercial participations.

Loans serving as collateral

Loans designated as qualified collateral and pledged to the FHLB for borrowing capacity are summarized below:

(Dollars in thousands)	March 31, 2016		December 31, 2015
Commercial real estate	$	277,056	$	281,802
Residential mortgages	122,744		118,855
Home equity	13,349		13,972
Total loans pledged to FHLB	$	413,149	$	414,629

(4) Allowance for Loan Losses

While the Company seeks to manage its loan portfolio to avoid concentration by industry and loan size to lessen its credit risk exposure, inherent in the lending process is the risk of loss due to customer non-payment, or "credit risk."  The Company endeavors to minimize this risk through sound underwriting practices and the risk management function; however, management recognizes that loan losses will occur and that the amount of these losses will fluctuate depending on the risk characteristics of the loan portfolio and economic conditions.

The allowance for loan losses is an estimate of probable credit risk inherent in the loan portfolio as of the specified balance sheet dates. The Company maintains the allowance at a level that it deems adequate to absorb all reasonably anticipated probable losses from specifically known and other credit risks associated with the portfolio. In making its assessment on the adequacy of the allowance, management considers several quantitative and qualitative factors that could have an effect on the credit quality of the portfolio, including individual assessment of larger and high risk credits, delinquency trends and the level of non-performing loans, impaired and restructured loans, net charge-offs, the growth and composition of the loan portfolio, expansion in the geographic market area, the experience level of lenders and changes in underwriting criteria, and the strength of the local and national economies, among other factors.

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 2015 Annual Report on Form 10-K.  Refer to heading "Allowance for probable loan losses methodology" contained in Note 4 "Allowance For Loan Losses," to the Company's consolidated financial statements contained in the 2015 Annual Report on Form 10-K for further discussion of management's methodology used to estimate the loan loss exposure inherent in the portfolio for purposes of establishing a sufficient allowance.

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Table of Contents ENTERPRISE BANCORP, INC. Notes to the Unaudited Consolidated Interim Financial Statements

The balances of loans as of March 31, 2016 by segment and evaluation method are summarized as follows: 

(Dollars in thousands)	Loans individually evaluated for impairment		Loans collectively evaluated for impairment			Total Loans
Commercial real estate	$	9,926	$	926,981		$	936,907
Commercial and industrial	7,853		448,583			456,436
Commercial construction	2,989		204,225			207,214
Residential	307		170,278			170,585
Home equity	309		84,356			84,665
Consumer	21		10,518			10,539
Deferred Fees	—		(1,654		)	(1,654		)
Total loans	$	21,405	$	1,843,287		$	1,864,692

The balances of loans as of December 31, 2015 by segment and evaluation method are summarized as follows:

(Dollars in thousands)	Loans individually evaluated for impairment		Loans collectively evaluated for impairment			Total Loans
Commercial real estate	$	12,287	$	924,634		$	936,921
Commercial and industrial	7,810		450,743			458,553
Commercial construction	3,032		199,961			202,993
Residential	366		168,822			169,188
Home equity	169		83,204			83,373
Consumer	24		10,723			10,747
Deferred Fees	—		(1,813		)	(1,813		)
Total loans	$	23,688	$	1,836,274		$	1,859,962

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, adversely classified loans, 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. However, despite prudent loan underwriting and ongoing credit risk management, adverse changes within the Company's market area or deterioration in the local, regional or national economic conditions could negatively impact the portfolio's credit risk profile and the Company's asset quality in the future.

Adversely classified loans

The Company's loan risk rating system classifies loans depending on risk of loss characteristics.  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.

Loans classified as substandard include those loans characterized by the distinct possibility that the Company will sustain some loss if deficiencies are not corrected.  These loans are inadequately protected by the sound net worth and paying capacity of the borrower; repayment has become increasingly reliant on collateral liquidation or reliance on guarantees; credit weaknesses are well-defined; and borrower cash flow is insufficient to meet required debt service specified in loan terms and to meet other obligations, such as trade debt and tax payments.

Loans classified as doubtful have all the weaknesses inherent in a substandard rated loan with the added characteristic that the weaknesses make collection or full payment from liquidation, on the basis of currently existing facts, conditions, and values,

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highly questionable and improbable.  The probability of loss is extremely high, but because of certain important and reasonably specific pending factors which may work to the advantage and strengthening of the loan, its classification as an estimated loss is deferred until more exact status may be determined.

Loans classified as loss are generally considered uncollectible at present, although long-term recovery of part or all of loan proceeds may be possible.  These "loss" loans would require a specific loss reserve or charge-off.

Adversely classified loans may be accruing or in non-accrual status and may be additionally designated as impaired or restructured, or some combination thereof.  Loans which are evaluated to be of weaker credit quality are reviewed on a more frequent basis by management.

The following tables present the Company's credit risk profile for each class of loan in its portfolio by internally assigned risk rating category at the periods indicated. 

	March 31, 2016
	Adversely Classified						Not Adversely
(Dollars in thousands)	Substandard		Doubtful		Loss		Classified		Gross Loans
Commercial real estate	$	11,586	$	—	$	—	$	925,321	$	936,907
Commercial and industrial	9,100		42		3		447,291		456,436
Commercial construction	1,734		—		—		205,480		207,214
Residential	1,213		—		—		169,372		170,585
Home equity	644		—		—		84,021		84,665
Consumer	37		11		—		10,491		10,539
Total gross loans	$	24,314	$	53	$	3	$	1,841,976	$	1,866,346

	December 31, 2015
	Adversely Classified						Not Adversely
(Dollars in thousands)	Substandard		Doubtful		Loss		Classified		Gross Loans
Commercial real estate	$	12,487	$	—	$	—	$	924,434	$	936,921
Commercial and industrial	8,670		—		3		449,880		458,553
Commercial construction	1,776		—		—		201,217		202,993
Residential	1,278		—		—		167,910		169,188
Home equity	503		—		5		82,865		83,373
Consumer	38		11		—		10,698		10,747
Total gross loans	$	24,752	$	11	$	8	$	1,837,004	$	1,861,775

Total adversely classified loans amounted to 1.31% of total loans at March 31, 2016, as compared to 1.33% at December 31, 2015. At March 31, 2016, as compared to December 31, 2015, adversely classified balances decreased, due primarily to several larger commercial loan payoffs and principal payments, partially offset by additional credit downgrades during the period.

Past due and non-accrual loans

Loans on which the accrual of interest has been discontinued are designated as non-accrual and are credit downgraded to one of the adversely classified categories noted above.  Accrual of interest on loans is generally discontinued when a loan becomes contractually past due, with respect to interest or principal, by 90 days, or when reasonable doubt exists as to the full and timely collection of interest or principal. When a loan is placed on non-accrual status, all interest previously accrued but not collected is reversed against current period interest income. Interest payments received on loans in a non-accrual status are generally applied to principal on the books of the Company. Interest accruals are resumed on such loans only when payments are brought current and have remained current for a period of 180 days and when, in the judgment of management, the

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collectability of both principal and interest is reasonably assured. Additionally, deposit accounts overdrawn for 90 or more days are included in the consumer non-accrual balances below.

 The following tables present age analysis of past due loans as of the dates indicated. 

Balance at March 31, 2016
(Dollars in thousands)	Loans 30-59 Days Past Due		Loans 60-89 Days Past Due		Loans 90 or More Days Past Due (non- accrual)		Total Past Due Loans		Current Loans		Gross Loans
Commercial real estate	$	4,665	$	398	$	6,188	$	11,251	$	925,656	$	936,907
Commercial and industrial	833		238		4,106		5,177		451,259		456,436
Commercial construction	175		—		213		388		206,826		207,214
Residential	—		553		307		860		169,725		170,585
Home equity	—		—		424		424		84,241		84,665
Consumer	7		19		26		52		10,487		10,539
Total gross loans	$	5,680	$	1,208	$	11,264	$	18,152	$	1,848,194	$	1,866,346

Balance at December 31, 2015
(Dollars in thousands)	Loans 30-59 Days Past Due		Loans 60-89 Days Past Due		Loans 90 or More Days Past Due (non- accrual)		Total Past Due Loans		Current Loans		Gross Loans
Commercial real estate	$	1,124	$	1,140	$	8,506	$	10,770	$	926,151	$	936,921
Commercial and industrial	1,218		691		4,323		6,232		452,321		458,553
Commercial construction	581		—		335		916		202,077		202,993
Residential	250		180		366		796		168,392		169,188
Home equity	622		—		288		910		82,463		83,373
Consumer	35		10		27		72		10,675		10,747
Total gross loans	$	3,830	$	2,021	$	13,845	$	19,696	$	1,842,079	$	1,861,775

At March 31, 2016 and March 31, 2015, all loans 90 days or more past due were carried as non-accrual. Non-accrual loans which were not adversely classified amounted to $337 thousand at March 31, 2016 and $402 thousand at December 31, 2015. 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 0.60% at March 31, 2016, 0.74% at December 31, 2015, and 1.07% at March 31, 2015. Non-accrual loan balances decreased due primarily to several larger commercial loan payoffs and principal payments, partially offset by additional loans added to non-accrual status during the period. The increase in loans 30 - 59 days past due occurred within the commercial real estate portfolio at March 31, 2016, with the majority of these loans having subsequent payments made by mid-April.

The Company's obligation to fulfill the additional funding commitments on non-accrual 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. At March 31, 2016, there were no additional funding commitments for loans on non-accrual status.

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.  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 (or "TDR," see below).  Impaired loans

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exclude large groups of smaller-balance homogeneous loans, such as residential mortgage loans and consumer loans, which are collectively evaluated for impairment, and loans that are measured at fair value, unless the loan is amended in a TDR. 

Management does not set any minimum delay of payments as a factor in reviewing for impaired classification.  Management considers the individual payment status, net worth and earnings potential of the borrower, and the value and cash flow of the collateral as factors to determine if a loan will be paid in accordance with its contractual terms. An impaired or TDR loan classification will be considered for upgrade based on the borrower's sustained performance over time and their improving financial condition. Consistent with the criteria for returning non-accrual loans to accrual status, the borrower must demonstrate the ability to continue to service the loan in accordance with the original or modified terms and, in the judgment of management, the collectability of the remaining balances, both principal and interest, are reasonably assured. In the case of TDR loans having had a modified interest rate, that rate must be at, or greater than, a market rate for a similar credit at the time of modification for an upgrade to be considered.

Impaired loans are individually evaluated for credit loss and a specific allowance reserve is assigned for the amount of the estimated probable credit loss.  Refer to heading "Allowance for probable loan losses methodology" contained in Note 4 "Allowance For Loan Losses," to the Company's consolidated financial statements contained in the 2015 Annual Report on Form 10-K for further discussion of management's methodology used to estimate specific reserves for impaired loans.

The carrying value of impaired loans amounted to $21.4 million and $23.7 million at March 31, 2016 and December 31, 2015, respectively.  Total accruing impaired loans amounted to $10.3 million and $10.1 million at March 31, 2016 and December 31, 2015, respectively, while non-accrual impaired loans amounted to $11.1 million and $13.6 million as of March 31, 2016 and December 31, 2015, respectively.   The decrease was due primarily to the several larger commercial loan payoffs and principal payments discussed above. However, in the current period, the credit ratings of three larger commercial relationships were downgraded to criticized or adverse risk-ratings, based on a review of their individual business circumstances, including one commercial and industrial loan designated as impaired requiring additional specific reserves as of March 31, 2016.

The following tables set forth the recorded investment in impaired loans and the related specific allowance allocated as of the dates indicated.

Balance at March 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	$	11,810	$	9,926	$	9,165	$	761	$	179
Commercial and industrial	9,932		7,853		4,615		3,238		1,420
Commercial construction	3,024		2,989		1,552		1,437		488
Residential	395		307		307		—		—
Home equity	450		309		309		—		—
Consumer	23		21		—		21		21
Total	$	25,634	$	21,405	$	15,948	$	5,457	$	2,108

Balance at December 31, 2015
(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	$	14,903	$	12,287	$	11,734	$	553	$	186
Commercial and industrial	9,816		7,810		5,253		2,557		1,078
Commercial construction	3,147		3,032		1,583		1,449		499
Residential	453		366		366		—		—
Home equity	308		169		164		5		5
Consumer	25		24		—		24		24
Total	$	28,652	$	23,688	$	19,100	$	4,588	$	1,792

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Table of Contents ENTERPRISE BANCORP, INC. Notes to the Unaudited Consolidated Interim Financial Statements

The following table presents the average recorded investment in impaired loans and the related interest recognized during the periods indicated:

	Three Months Ended March 31, 2016					Three Months Ended March 31, 2015
(Dollars in thousands)	Average recorded investment		Interest income recognized			Average recorded investment		Interest income recognized
Commercial real estate	$	9,668	$	43		$	15,479	$	45
Commercial and industrial	8,424		26			11,256		34
Commercial construction	2,975		37			2,624		26
Residential	308		—			459		—
Home equity	246		(2		)	179		1
Consumer	22		—			49		—
Total	$	21,643	$	104		$	30,046	$	106

At March 31, 2016, additional funding commitments for impaired loans totaled $469 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, 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. All loans that are modified are reviewed by the Company to identify if a TDR has occurred. TDR loans are included in the impaired loan category and, as such, these loans are individually evaluated and a specific reserve is assigned for the amount of the estimated probable credit loss. 

Total TDR loans, included in the impaired loan balances above, as of March 31, 2016 and December 31, 2015, were $15.6 million and $17.1 million, respectively. TDR loans on accrual status amounted to $10.3 million and $10.1 million at March 31, 2016 and December 31, 2015, respectively. TDR loans included in non-performing loans amounted to $5.3 million and $7.1 million at March 31, 2016 and December 31, 2015, respectively. The Company continues to work with 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 current economic environment.

At March 31, 2016, additional funding commitments for TDR loans totaled $469 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.

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Table of Contents ENTERPRISE BANCORP, INC. Notes to the Unaudited Consolidated Interim Financial Statements

The following tables present certain information regarding loan modifications classified as troubled debt restructures.

Loans modified as troubled debt restructurings during the three months endedMarch 31, 2016 are detailed below.

	Three months ended March 31, 2016
(Dollars in thousands)	Number of restructurings	Pre-modification outstanding recorded investment		Post-modification outstanding recorded investment
Commercial real estate	—	$	—	$	—
Commercial and industrial	1	264		264
Commercial construction	—	—		—
Residential	—	—		—
Home equity	—	—		—
Consumer	—	—		—
Total	1	$	264	$	264

There were no loans modified as troubled debt restructurings within the preceding twelve month period for which there was a subsequent payment default during the three months endedMarch 31, 2016.

There were no subsequent charge-offs associated with the TDRs noted in the table above during the three months ended months ended March 31, 2016. At March 31, 2016, there were no specific reserves allocated to the TDRs entered into during the 2016 period as management considered it likely that the unreserved principal will ultimately be collected. The TDR noted in the table above was on accrual status pre and post modification.

Loans modified as troubled debt restructurings during the three month period ended March 31, 2015 are detailed below. 

	Three months ended March 31, 2015
(Dollars in thousands)	Number of restructurings	Pre-modification outstanding recorded investment		Post-modification outstanding recorded investment
Commercial real estate	—	$	—	$	—
Commercial and industrial	4	869		869
Commercial construction	—	—		—
Residential	—	—		—
Home equity	—	—		—
Consumer	—	—		—
Total	4	$	869	$	869

There were no loans modified as troubled debt restructurings within the preceding twelve month period for which there was a subsequent payment default during the period.

At March 31, 2015, there were specific reserves of $61 thousand allocated to the TDRs entered into during the 2015 period as management considered it likely that the unreserved principal would ultimately be collected. Interest payments received on non-accruing TDRs in the table above which were applied to principal and not recognized in interest income during the three months ended months ended amounted to $1 thousand.

There were no subsequent charge-offs associated with the TDRs noted in the table above during the three months endedMarch 31, 2015.

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Table of Contents ENTERPRISE BANCORP, INC. Notes to the Unaudited Consolidated Interim Financial Statements

Other real estate owned ("OREO")

Real estate acquired by the Company through foreclosure proceedings or the acceptance of a deed in lieu of foreclosure is classified as OREO. When property is acquired, it is generally recorded at the lesser of the loan's remaining principal balance, net of any unamortized deferred fees, or the estimated fair value of the property acquired, less estimated costs to sell, establishing a new cost basis. The estimated fair value is based on market appraisals and the Company's internal analysis. Any loan balance in excess of the estimated realizable fair value on the date of transfer is charged to the allowance for loan losses on that date. All costs incurred thereafter in maintaining the property, as well as subsequent declines in fair value, are charged to non-interest expense.

The Company carried no OREO at both March 31, 2016 and December 31, 2015. There were no sales on OREO during the three months endedMarch 31, 2016; there were also no additions to OREO, or subsequent impairment write-downs during the period. During the three months endedMarch 31, 2015, the Company recorded $154 thousand of net gains on OREO sales; however there were no subsequent write downs of OREO during that period.

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 $29.9 million at March 31, 2016, compared to $29.0 million at December 31, 2015, and $27.8 million at March 31, 2015. For the three months endedMarch 31, 2016 and March 31, 2015, the provision for loan losses amounted to $850 thousand and $625 thousand, respectively. The increase in the provision for the three months endedMarch 31, 2016 was due primarily to additional reserves allocated to criticized and adversely classified commercial loans.

In determining the provision to the allowance for loan losses, management takes into consideration the level of loan growth and an estimate of credit risk, which includes such items as adversely classified and non-performing loans, the estimated specific reserves needed for impaired loans, the level of net charge-offs, and the estimated impact of current economic conditions on credit quality. Loan growth for the three months endedMarch 31, 2016 was $4.7 million compared to $9.5 million during the three months endedMarch 31, 2015. Total non-performing loans as a percentage of total loans declined to 0.60% at March 31, 2016, compared to 1.07% at March 31, 2015. The balance of the allowance for loan losses allocated to impaired loans amounted to $2.1 million at March 31, 2016, compared to $2.7 million at March 31, 2015. The balance of the allowance for loan losses allocated to non-impaired classified loans amounted to $2.2 million at March 31, 2016, compared to $1.6 million at March 31, 2015. The Company recorded net recoveries of $52 thousand for the three months endedMarch 31, 2016, compared to net recoveries of $57 thousand for the three months endedMarch 31, 2015.

The allowance for loan losses to total loans ratio was 1.60% at March 31, 2016, 1.56% at December 31, 2015 and 1.65% at March 31, 2015. The decline in the allowance ratio reflects the generally improving credit quality of the loan portfolio due, in part, to improved economic conditions. However, in the current period, the credit ratings of three larger commercial relationships were downgraded to "criticized" or "adverse" risk-ratings, based on a review of their individual business circumstances, requiring higher levels of reserves in the current period which increased the allowance to total loan ratio compared to December 31, 2015.

Management continues to closely monitor the non-performing assets, charge-offs and necessary allowance levels, including specific reserves. 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 credit risks associated with the portfolio as of March 31, 2016.

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Table of Contents ENTERPRISE BANCORP, INC. Notes to the Unaudited Consolidated Interim Financial Statements

Changes in the allowance for loan losses by segment for the three months ended months ended March 31, 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	294		463		64		16		6		7		850
Recoveries	19		129		—		—		—		2		150
Less: Charge offs	—		72		5		—		5		16		98
Ending Balance at March 31, 2016	$	13,827	$	10,278	$	3,964	$	1,077	$	541	$	223	$	29,910
Ending allowance balance:
Allotted to loans individually evaluated for impairment	$	179	$	1,420	$	488	$	—	$	—	$	21	$	2,108
Allotted to loans collectively evaluated for impairment	$	13,648	$	8,858	$	3,476	$	1,077	$	541	$	202	$	27,802

Changes in the allowance for loan losses by segment for the three months ended months ended March 31, 2015 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, 2014	$	12,664	$	9,245	$	3,384	$	989		$	608	$	231	$	27,121
Provision	78		530		11		(29		)	7		28		625
Recoveries	5		84		13		—			—		8		110
Less: Charge offs	—		17		—		—			—		36		53
Ending Balance at March 31, 2015	$	12,747	$	9,842	$	3,408	$	960		$	615	$	231	$	27,803
Ending allowance balance:
Allotted to loans individually evaluated for impairment	$	165	$	1,951	$	528	$	—		$	22	$	49	$	2,715
Allotted to loans collectively evaluated for impairment	$	12,582	$	7,891	$	2,880	$	960		$	593	$	182	$	25,088

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Table of Contents ENTERPRISE BANCORP, INC. Notes to the Unaudited Consolidated Interim Financial Statements

(5) Deposits

Deposits are summarized as follows:

(Dollars in thousands)	March 31, 2016		December 31, 2015
Non-interest bearing demand deposits	$	599,282	$	570,589
Interest bearing checking	313,314		313,674
Savings	179,127		167,304
Money market	735,492		692,114
Certificates of deposit $250,000 or less	127,925		129,993
Certificates of deposit more than $250,000	43,309		37,704
Total non-brokered deposits (1)	1,998,449		1,911,378
Brokered deposits (2)	89,288		106,770
Total deposits	$	2,087,737	$	2,018,148

(1) Includes reciprocal money market deposits and CDs received from participating banks in nationwide networks as a result of our customers electing to participate in programs to obtain full FDIC insurance. Essentially, the equivalent of the original deposit comes back to the Company as non-brokered deposits within the appropriate category under total deposits on the balance sheet.

(2) Primarily brokered CDs $250,000 and under.

(6) Borrowed Funds and Subordinated Debt

Borrowed funds amounted to $671 thousand at March 31, 2016, compared to $53.7 million at December 31, 2015. At March 31, 2016 borrowed funds consisted of FHLB borrowings only. At December 31, 2015 the borrowed funds balance was comprised of FHLB borrowings of $40.7 million and Other borrowings, which represented an overnight borrowing with a correspondent bank, totaling $13.0 million.

The Company also carried subordinated debt of $14.8 million at both March 31, 2016 and December 31, 2015.

The subordinated debt carried at both March 31, 2016 and December 31, 2015 consisted of $15.0 million in aggregate principal amount of Fixed-to-Floating Rate Subordinated Notes (the "Notes"), issued in January 2015, in a private placement to an accredited investor. The Notes, which are intended to qualify as Tier 2 capital for regulatory purposes, mature on January 30, 2030 (the "Maturity Date") and are callable by the Company, subject to regulatory approval, at a premium beginning January 30, 2020, and at par beginning January 30, 2025. The Notes pay interest at a fixed rate of 6.00% per annum through January 30, 2025, and beginning on January 31, 2025 through the Maturity Date, or any early redemption date, the interest rate on the Notes will adjust monthly at an interest rate of 3.90% plus 30-day LIBOR. Original note issuance costs were $190 thousand and have been netted against the subordinated debt on the balance sheet in accordance with recent accounting guidance which the Company adopted in the first quarter of 2015. These costs are being amortized over the life of the Notes.

Prior to the end of March 2015, the Company had subordinated debt consisting of Junior Subordinated Debt Securities (the "Debt"). In March 2000, Enterprise (MA) Capital Trust I (the "Trust"), a subsidiary of Enterprise Bancorp, issued $10.5 million of 10.88% trust preferred securities that were to mature in 2030 and were callable at a premium. The proceeds from the sale of the trust preferred securities were used by the Trust, along with the Company's $325 thousand capital contribution, to acquire $10.8 million in aggregate principal amount of the Company's 10.88% Debt that was to mature in 2030 and was callable.

In March 2015, the Company redeemed the Debt in full using proceeds from the $15.0 million in Notes issued in January 2015, which in turn allowed the Trust to redeem in full the trust preferred securities.

(7) 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

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Table of Contents ENTERPRISE BANCORP, INC. Notes to the Unaudited Consolidated Interim Financial Statements

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 March 31, 2016 and 2015, the estimated fair values of these derivative instruments were considered to be immaterial.

The Company may use interest-rate swap agreements 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 March 31, 2016 and 2015.

Beginning in the fourth quarter of 2015, the Company implemented 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 transaction structure effectively minimizes the Bank’s net risk exposure resulting from such transactions. The customer interest-rate swap agreement allows commercial banking customers to convert a floating-rate loan payment to fixed-rate loan payment.

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 inverse relationship, are recognized directly in earnings. The Company had two interest-rate swaps at both March 31, 2016 and December 31, 2015 with an aggregate notional amount of $10.1 million at the end of both periods.

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 March 31, 2016				As of December 31, 2015
(Dollars in thousands)	Asset Derivatives		Liability Derivatives		Asset Derivatives		Liability Derivatives
Back-to-Back Swaps	$	225	$	225	$	16	$	16

There was no gain or loss recognized in income on derivatives during the three months endedMarch 31, 2016.

By using derivative financial instruments, the Company exposes itself to 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 limited exposure relating to interest rate swaps with institutional counterparties at March 31, 2016. The Company did not have any credit risk exposure for derivative financial instruments at March 31, 2016.

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Table of Contents ENTERPRISE BANCORP, INC. Notes to the Unaudited Consolidated Interim Financial Statements

Certain derivative agreements 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 offsetting of derivatives and amounts subject to master netting agreements not offset in the consolidated balance sheet at the dates indicated.

	March 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	$	225	—	$	225	—	—	$	225
Liability Derivatives
Back-to-Back Swaps	$	225	—	$	225	—	240	$	(15	)

	December 31, 2015
	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	$	16	—	$	16	—	—	$	16
Liability Derivatives
Back-to-Back Swaps	$	16	—	$	16	—	—	$	16

The Company has agreements with certain derivative 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.

(8) Supplemental Retirement Plan and Other Postretirement Benefit Obligations

Supplemental Retirement Plan

The Company has salary continuation agreements with two of its current executive officers and one former executive officer. These 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

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Table of Contents ENTERPRISE BANCORP, INC. Notes to the Unaudited Consolidated Interim Financial Statements

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 $31 thousand for both the three months ended March 31, 2016 and March 31, 2015.

Benefits paid amounted to $69 thousand for both the three months endedMarch 31, 2016 and March 31, 2015. The Company anticipates accruing an additional $93 thousand to the plan during the remainder of 2016.

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 total net periodic benefit costs, which were comprised primarily of interest costs, amounted to $19 thousand for the three months endedMarch 31, 2016, compared to $18 thousand for the three months endedMarch 31, 2015.

(9) Stock-Based Compensation

The Company currently has three individual stock incentive plans: the 2003 plan as amended in 2009, the 2009 plan as amended in 2015 and the 2016 plan. The plans permit the Board of Directors to grant, under various terms, both incentive and non-qualified 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.  As of March 31, 2016, 107,992 shares remain available for future grants under the 2009 plan. The 2016 plan which was approved by our stockholders at the May 2016 annual meeting, with essentially the same terms as the 2003 and 2009 plans, has 350,000 shares available for future grants. The 2003 plan is closed to future grants, although several awards previously granted under this plan remain outstanding and may be exercised in the future.

The Company's stock-based compensation expense includes stock options and stock awards to officers and other employeesincluded in salary and benefits expense, and stock awards and stock compensation in lieu of cash fees to non-employee directors included in other operating expenses.  Total stock-based compensation expense was $443 thousand for the three months ended March 31, 2016, compared to $488 thousand for the three months ended March 31, 2015.

Stock Option Awards

The Company recognized stock-based compensation expense related to stock option awards of $79 thousand for the three months ended March 31, 2016, compared to $97 thousand for the three months ended March 31, 2015.

The Company utilizes the Black-Scholes option valuation model in order to determine the per share grant date fair value of option grants.

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Table of Contents ENTERPRISE BANCORP, INC. Notes to the Unaudited Consolidated Interim Financial Statements

The table below provides a summary of the options granted in 2016 and 2015.

	Three Months Ended March 31,
	2016			2015
Options granted	30,613			27,115
Term in years	10			10
Average assumptions used in the fair value model:
Expected volatility	42		%	47		%
Expected dividend yield	3.03		%	2.89		%
Expected life in years	7			7
Risk-free interest rate	1.91		%	1.95		%
Market price on date of grant	$	21.86		$	21.03
Per share weighted average fair value	$	7.90		$	8.51
Fair value as a percentage of market value at grant date	36		%	40		%

Options granted during the first three months of 2016 and 2015 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. 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 11 "Stock-Based Compensation Plans" in the Company's 2015 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 $294 thousand for the three months endedMarch 31, 2016, compared to $309 thousand for the three months endedMarch 31, 2015.

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 or about 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 or about the first anniversary date of the award.

The table below provides a summary of restricted stock awards granted in 2016 and 2015.

	Three Months Ended March 31,
Restricted Stock Awards	2016		2015
Two Year Vesting	9,060		7,276
Four Year Vesting	17,453		17,181
Performance-Based Vesting	35,071		30,262
Total Restricted Stock Awards	61,584		54,719
Weighted average grant date fair value	$	21.86	$	21.03

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.

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Table of Contents ENTERPRISE BANCORP, INC. Notes to the Unaudited Consolidated Interim Financial Statements

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. In accordance with 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.

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 $70 thousand for the three months endedMarch 31, 2016, compared to $82 thousand for the three months endedMarch 31, 2015, and is included in other operating expenses. In January 2016, non-employee directors were issued 10,657 shares of common stock in lieu of 2015 annual cash fees of $254 thousand at a market value price of $23.86 per share, the market value of the common stock on the opt-in measurement date of January 2, 2015.

(10) 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. 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 March 31,
	2016	2015
Basic weighted average common shares outstanding	10,405,112	10,243,044
Dilutive shares	66,672	67,430
Diluted weighted average common shares outstanding	10,471,784	10,310,474

For the three months endedMarch 31, 2016, all options outstanding were included in the year-to-date calculation of diluted earnings per share, as they were all considered "in the money" under the treasury stock method.

(11) 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.

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Table of Contents ENTERPRISE BANCORP, INC. Notes to the Unaudited Consolidated Interim Financial Statements

The following tables summarize significant assets and liabilities carried at fair value and placement in the fair value hierarchy at the dates specified:

	March 31, 2016		Fair Value Measurements using:
(Dollars in thousands)	Fair Value		(level 1)		(level 2)		(level 3)
Assets measured on a recurring basis:
Fixed income securities	$	292,500	$	—	$	292,500	$	—
Equity securities	12,446		12,446		—		—
FHLB stock	2,793		—		—		2,793
Interest-rate swaps	225		—		225		—
Assets measured on a non-recurring basis:
Impaired loans (collateral dependent)	3,088		—		—		3,088
Liabilities measured on a recurring basis
Interest-rate swaps	225		—		225		—

	December 31, 2015		Fair Value Measurements using:
(Dollars in thousands)	Fair Value		(level 1)		(level 2)		(level 3)
Assets measured on a recurring basis:
Fixed income securities	$	288,701	$	—	$	288,701	$	—
Equity securities	11,657		11,657		—		—
FHLB stock	3,050		—		—		3,050
Interest-rate swaps	16		—		16		—
Assets measured on a non-recurring basis:
Impaired loans (collateral dependent)	2,516		—		—		2,516
Liabilities measured on a recurring basis
Interest-rate swaps	16		—		16		—

The Company did not have cause to transfer any assets between the fair value measurement levels during the three months endedMarch 31, 2016 or the year ended December 31, 2015.

All of the Company's fixed income investments and equity securities that are considered "available-for-sale" are carried at fair value.  The fixed income 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 fixed income 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 fixed income 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

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Table of Contents ENTERPRISE BANCORP, INC. Notes to the Unaudited Consolidated Interim Financial Statements

categorized as Level 3 measures.  See Note 1, "Summary of Significant Accounting Policies," Item (d) 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 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 at March 31, 2016 amounted to $1.2 million compared to $1.4 million at December 31, 2015.

When OREO property is acquired, it is generally recorded at the lesser of the loan's remaining principal balance, net of unamortized deferred fees, or the estimated fair value of the property acquired, less estimated costs to sell.  The estimated fair value is based on market appraisals and the Company's internal analysis.  Certain inputs used in appraisals or the Company's internal analysis are not always observable and therefore, OREO may be categorized as Level 3 within the fair value hierarchy.  The Company carried no OREO at both March 31, 2016 and December 31, 2015. There were no sales on OREO during the three months endedMarch 31, 2016; there were also no additions to OREO, or subsequent impairment write-downs during the period. During the three months endedMarch 31, 2015, the Company recorded $154 thousand of net gains on OREO sales; however there were no subsequent write downs of OREO during that period.

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 risks associated with the counterparties and the Company 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 March 31, 2016 and December 31, 2015 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 March 31, 2016 and December 31, 2015, the estimated fair value of the Company's derivative instruments was considered to be immaterial.

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Table of Contents ENTERPRISE BANCORP, INC. Notes to the Unaudited Consolidated Interim Financial Statements

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 March 31, 2016

(Dollars in thousands)	Fair Value	Valuation Technique	Unobservable Input	Unobservable Input Value or Range
Assets measured on a recurring basis:
FHLB stock	$2,793	FHLB Stated Par Value	N/A	N/A
Assets measured on a non-recurring basis:
Impaired loans (collateral dependent)	$3,088	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 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:

	March 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	$	770	$	771	$	—	$	771	$	—
Loans, net	1,834,782		1,850,258		—		—		1,850,258
Financial liabilities:
Certificates of deposit (including brokered)	260,522		260,636		—		260,636		—
Borrowed funds	671		671		—		671		—
Subordinated debt	14,825		14,758		—		—		14,758

	December 31, 2015				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	$	1,709	$	1,709	$	—	$	1,709	$	—
Loans, net	1,830,954		1,845,009		—		—		1,845,009
Financial liabilities:
Certificates of deposit (including brokered)	274,467		273,419		—		273,419		—
Borrowed funds	53,671		53,670		—		53,670		—
Subordinated debt	14,822		13,961		—		—		13,961

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, accrued interest receivable, non-term deposit accounts, and accrued interest payable. The respective carrying values of these instruments would all be considered to be classified within Level 1 of their fair value hierarchy.

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Table of Contents ENTERPRISE BANCORP, INC. Notes to the Unaudited Consolidated Interim Financial Statements

Also excluded from these tables are the fair values of commitments for 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 non-mortgage 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 recordedat 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 March 31, 2016 and December 31, 2015 for similar instruments.  The fair value of subordinated debt was estimated using discounted cash flow analysis using a market rate of interest at March 31, 2016 and December 31, 2015.

Limitations:  The estimates of fair value of financial instruments were based on information available at March 31, 2016 and December 31, 2015 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.

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.

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Item 2 - Management's Discussion and Analysis of Financial Condition and Results of Operations

Management's discussion and analysis should be read in conjunction with the Company's (also referred to herein as "Enterprise," "us," "we" or "our") unaudited consolidated interim financial statements and notes thereto contained in this report and the consolidated financial statements and notes thereto contained in the Company's 2015 Annual Report on Form 10-K.

Special Note Regarding Forward-Looking Statements

This Quarterly Report on Form 10-Q (this "Form 10-Q") contains certain "forward-looking statements" within the meaning of the Private Securities Litigation Reform Act of 1995, including statements concerning plans, objectives, future events or performance and assumptions and other statements that are other than statements of historical fact. Forward-looking statements may be identified by reference to a future period or periods or by use of forward-looking terminology such as "anticipates," "believes," "expects," "intends," "may," "plans," "pursue," "views" and similar terms or expressions. Various statements contained in Item 2 - "Management's Discussion and Analysis of Financial Condition and Results of Operations" and Item 3 - "Quantitative and Qualitative Disclosures About Market Risk" of this Form 10-Q including, but not limited to, statements related to management's views on the banking environment and the economy, competition and market expansion opportunities, the interest rate environment, credit risk and the level of future non-performing assets and charge-offs, potential asset and deposit growth, future non-interest expenditures and non-interest income growth, and borrowing capacity are forward-looking statements. The Company cautions readers that such forward-looking statements reflect numerous assumptions and involve a number of risks and uncertainties that could cause the Company's actual results to differ materially from those expressed in, or implied by, the forward looking statement. The forward-looking statements in this report are based on information available to the Company as of the date of this Form 10-Q and the Company undertakes no obligation to publicly update or otherwise revise any forward-looking statement, whether as a result of new information, future events or otherwise, except as required by applicable law. The following important factors, among others, could cause the Company's results for subsequent periods to differ materially from those expressed in any forward-looking statement made in this Form 10-Q: (i) changes in interest rates could negatively impact net interest income; (ii) changes in the business cycle and downturns in the local, regional or national economies, including deterioration in the local real estate market, could negatively impact credit and/or asset quality and result in credit losses and increases in the Company's allowance for loan losses; (iii) changes in consumer spending could negatively impact the Company's credit quality and financial results; (iv) increasing competition from larger regional and out-of-state banking organizations as well as non-bank providers of various financial services could adversely affect the Company's competitive position within its market area and reduce demand for the Company's products and services; (v) deterioration of securities markets could adversely affect the value or credit quality of the Company's assets and the availability of funding sources necessary to meet the Company's liquidity needs; (vi) changes in technology, including the increased cyber-security risk and identity theft, could adversely impact the Company's operations and increase technology-related expenditures; (vii) increases in employee compensation and benefit expenses could adversely affect the Company's financial results; (viii) changes in laws and regulations that apply to the Company's business and operations, including without limitation, the Dodd-Frank Wall Street Reform and Consumer Protection Act (the "Dodd-Frank Act"), the Jumpstart Our Business Startups Act (the "JOBS Act"), the Basel III rules adopted by the federal banking regulators and the additional regulations that will be forthcoming as a result thereof, could cause the Company to incur additional costs and adversely affect the Company's business environment, operations and financial results; (ix) changes in accounting standards, policies and practices, as may be adopted or established by the regulatory agencies, the FASB, or the Public Company Accounting Oversight Board could negatively impact the Company's financial results; (x) our ability to enter new markets successfully and capitalize on growth opportunities, including the receipt of required regulatory approvals; (xi) future regulatory compliance costs, including any increase caused by new regulations imposed by the Consumer Finance Protection Bureau; and (xii) the risks and uncertainties described in the documents that the Company files or furnishes to the Securities and Exchange Commission (the "SEC"), including in Item 1A of the Company's 2015 Annual Report on Form 10-K, which could have a material adverse effect on the Company's business, financial condition and results of operations.  Therefore, the Company cautions readers not to place undue reliance on any such forward-looking information and statements.

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Overview

Executive Summary

Net income for the three months endedMarch 31, 2016 amounted to $4.3 million, an increase of $693 thousand, or 19%, compared to the three months endedMarch 31, 2015. Diluted earnings per share were $0.41 for the three months endedMarch 31, 2016, an increase of 17% compared to the three months endedMarch 31, 2015.

The increase in our 2016first quarter earnings compared to 2015 was largely driven by our growth over the last twelve months. Loans and deposits, excluding brokered deposits, increased $182.6 million, or 11%, and $252.5 million, or 14%, respectively, as compared to March 31, 2015. Additionally, as part of our continued organic growth, our 23rd branch, on route 101A, in Nashua, NH is scheduled to open in the second quarter of 2016. Strategically, our focus remains on organic growth and continually planning for and investing in our future.

Composition of Earnings

The Company’s growth contributed to increases in net interest income and non-interest expenses. This growth and other items impacting the Company’s net income are discussed further below.

The Company's earnings are largely dependent on its net interest income, which is the difference between interest earned on loans and investments and the cost of funding (primarily deposits and borrowings).  Net interest income expressed as a percentage of average interest earning assets is referred to as net interest margin.  The Company reports net interest margin on a tax equivalent basis ("margin").

Net interest income for the three months endedMarch 31, 2016 amounted to $21.1 million, an increase of $2.6 million, or 14%, compared to the three months endedMarch 31, 2015. The increase in net interest income was due primarily to loan growth. Average loan balances (including loans held for sale) increased $181.0 million for the three months endedMarch 31, 2016 compared to the same 2015 period average. Margin was 4.02% for the three months endedMarch 31, 2016, compared to 3.97% and 3.95% for the three months endedDecember 31, 2015 and March 31, 2015, respectively.

For the three months endedMarch 31, 2016 and March 31, 2015, the provision for loan losses amounted to $850 thousand and $625 thousand, respectively. The increase in the provision for the three months endedMarch 31, 2016 was due primarily to additional reserves allocated to criticized and adversely classified commercial loans.

In determining the provision to the allowance for loan losses, management takes into consideration the level of loan growth and an estimate of credit risk, which includes such items as adversely classified and non-performing loans, the estimated specific reserves needed for impaired loans, the level of net charge-offs, and the estimated impact of current economic conditions on credit quality. Loan growth for the three months endedMarch 31, 2016 was $4.7 million compared to $9.5 million during the three months endedMarch 31, 2015. Total non-performing loans as a percentage of total loans declined to 0.60% at March 31, 2016, compared to 1.07% at March 31, 2015. The balance of the allowance for loan losses allocated to impaired loans amounted to $2.1 million at March 31, 2016, compared to $2.7 million at March 31, 2015. The balance of the allowance for loan losses allocated to non-impaired classified loans amounted to $2.2 million at March 31, 2016, compared to $1.6 million at March 31, 2015. The Company recorded net recoveries of $52 thousand for the three months endedMarch 31, 2016, compared to net recoveries of $57 thousand for the three months endedMarch 31, 2015.

The allowance for loan losses to total loans ratio was 1.60% at March 31, 2016, 1.56% at December 31, 2015 and 1.65% at March 31, 2015. The decline in the allowance ratio reflects the generally improving credit quality of the loan portfolio, in part, due to improved economic conditions. However, in the current period the credit ratings of three larger commercial relationships were downgraded, based on a review of their individual business circumstances, requiring higher levels of reserves in the current period which increased the allowance to total loan ratio compared to December 31, 2015.

For further information regarding loan quality statistics and the allowance for loan losses, see the sections below under the heading "Financial Condition" titled "Asset Quality" and "Allowance for Loan Losses."

Non-interest income for the three months endedMarch 31, 2016 amounted to $3.2 million, a decrease of $819 thousand, or 20%, compared to the three months endedMarch 31, 2015 due primarily to a decrease in net gains on the sales of investment securities. Included in other income for the three months endedMarch 31, 2015 was the net loss on the Company’s Capital

36

Trust subsidiary due to the write-off of debt issuance costs related to the redemption of Trust Preferred Securities (Subordinated Debt), partially offset by gains on the sales of other real estate owned.

For the three months endedMarch 31, 2016, non-interest expense amounted to $16.9 million, an increase of $659 thousand, or 4%, over the three months endedMarch 31, 2015. Increases in expenses over the prior year primarily related to increases in salaries and benefits due to the Company’s strategic growth and market expansion initiatives. Non-interest expense for three months endedMarch 31, 2015 was also impacted by prepayment fees associated with the redemption of the Trust Preferred Securities mentioned above, included in other expenses.

Sources and Uses of Funds

The Company's primary sources of funds are customer and brokered deposits, Federal Home Loan Bank ("FHLB") borrowings, current earnings and proceeds from the sales, maturities and pay-downs on loans and investment securities.  The Company may also, from time to time, utilize overnight borrowings from correspondent banks to provide additional funding sources and to aid in the Company's asset liability and interest rate risk positioning. Additionally, funding for the Company may be generated through the issuance of debt securities or equity transactions, including the dividend reinvestment and direct stock purchase plan, exercise of stock options, and occasionally the sale of new stock. These funds are used to originate loans, purchase investment securities, conduct operations, expand the branch network, and pay dividends to stockholders.

The investment portfolio is primarily used to provide liquidity, manage the Company's asset-liability position and to invest excess funds, providing additional sources of revenue. Total investments, one of the key components of interest earning assets, amounted to $304.9 million at March 31, 2016, and comprised 13% of total assets at both March 31, 2016 and December 31, 2015.

Enterprise's main asset strategy is to grow loans, the largest component of interest earning assets, with a focus on high quality commercial loans.  Total loans increased $4.7 million, since December 31, 2015 and amounted to $1.86 billion at March 31, 2016, comprising 81% of total assets at both March 31, 2016 and December 31, 2015. Total commercial loans amounted to $1.60 billion, or 86% of gross loans, at March 31, 2016, which was consistent with the composition at December 31, 2015.

Management's preferred strategy for funding asset growth is to grow low cost deposits (comprised of demand deposit accounts, interest and business checking accounts and traditional savings accounts).  Asset growth in excess of low cost deposits is typically funded through "higher cost" deposits (comprised of money market accounts, commercial tiered rate or "investment savings" accounts and term certificates of deposit) and wholesale funding (brokered deposits and borrowed funds).

At March 31, 2016, total deposits, excluding brokered deposits, amounted to $2.00 billion, an increase of $87.1 million, or 5%, from December 31, 2015 balances. Non-brokered deposit growth since December 31, 2015 occurred in all deposit categories with the largest growth noted in money markets.

Wholesale funding amounted to $90.0 million at March 31, 2016, compared to $160.4 million at December 31, 2015, a decrease of $70.5 million, or 44%. Wholesale funding included FHLB advances of $671 thousand and $40.7 million at March 31, 2016 and December 31, 2015, respectively, and brokered deposits of $89.3 million and $106.8 million at March 31, 2016 and December 31, 2015, respectively. At December 31, 2015, the Company also had an overnight borrowing of $13.0 million with a correspondent bank, which was included in Other borrowings. Overnight borrowing balances have declined since year end as deposits have grown.

Opportunities and Risks

The Company's ability to achieve its long-term strategic growth and market share objectives will depend in part upon the Company's continued success in differentiating itself in the market place and its ability to strengthen its competitive position. Enterprise faces robust competition to attract and retain customers within existing and neighboring geographic markets. National and larger regional banks have a local presence in the Company's market area.  These larger banks have certain competitive advantages, including greater financial resources and the ability to make larger loans to a single borrower. Numerous local savings banks, commercial banks, cooperative banks and credit unions also compete in the Company's market area. The expanded commercial lending capabilities of credit unions and the shift to commercial lending by traditional savings banks means that both of these types of traditionally consumer-orientated institutions now compete for the Company's targeted commercial customers. In addition, the non-taxable status of credit unions allows them certain advantages as compared to taxable institutions such as Enterprise. Competition for loans, deposits and cash management services, investment advisory assets, and insurance business also comes from other businesses that provide financial services, including consumer finance

37

companies, mortgage brokers and lenders, private lenders, insurance companies, securities brokerage firms, institutional mutual funds, registered investment advisors, internet based banks, non-bank payment and funding channels, and other financial intermediaries.  Consolidation within the industry, customer disenfranchisement with larger national/international banks, banks exiting certain business lines and/or markets, the cost of compliance with new government regulations, and the continued low interest rate environment have and are expected to continue to have an impact on the regional competitive market. The Company also faces increasing competition within its marketplace on the pricing of loans. This is expected to be an ongoing competitive challenge; however, the Company is committed to maintaining asset quality and focuses its sales efforts on building long-term relationships, rather than competing for individual transactions or easing loan terms. In addition, the increased use and advances in technology such as internet and mobile banking, non-bank payment channels, electronic transaction processing and cyber-security, are expected to have a significant impact on the future competitive landscape confronting financial service businesses.

The Company's business model is to provide a full range of diversified financial products and services through a highly-trained staff of knowledgeable banking professionals, with in-depth understanding of our markets, commitment to open and honest communication with clients and dedication to active community service. Management believes the Company has differentiated itself from the competition by building a solid reputation within the local market as a dependable commercial-focused community bank, delivering consistent and exceptional customer service, offering competitive products and by taking an active role in support of the communities we serve. The Company's banking professionals are committed to upholding the Company's core values, including significant and active involvement in many charitable and civic organizations, and community development programs throughout our service area. This long-held commitment to community not only contributes to the welfare of the communities we serve, it also helps to fuel the local economy and has led to a strong referral network with local business, non-profit organizations and community leaders. Management believes the Company's community service reputation and culture positions the Company to be a leading provider of banking, investment advisory and wealth management, trust and insurance services in its growing market area.

The Company actively seeks to increase deposit share and strengthen its competitive position through continuous reviews of deposit product offerings, cash management and ancillary services and state-of-the-art delivery channels, targeted to businesses, non-profits, professional practice groups, municipalities and consumers' needs. These products and services are delivered by experienced local banking professionals who possess strong technical skills, and function as trusted advisors to clients. In addition, Enterprise carefully plans deposit expansion through new branch development, identifying offices strategically located to complement existing locations while expanding the Company's geographic market footprint. In 2015, the Company announced plans to open its second Nashua, NH branch, for which regulatory approvals have been received, and anticipates that the office will open in the second quarter of 2016. Branch expansion is aimed at achieving not only deposit market share growth, but also is intended to contribute to loan originations and generate referrals for investment advisory and wealth management, trust and insurance services, residential mortgages and cash management products.

Management believes that Enterprise is also well equipped to capitalize on market potential to grow both the commercial and residential loan portfolios through strong business development efforts, while utilizing a disciplined and consistent lending approach and credit review practices, which have served to provide quality asset growth over varying economic cycles during the Company's history.  The Company has a skilled lending sales force with a broad breadth of business knowledge and depth of lending experience to draw upon, supported by a highly qualified and experienced commercial credit review function.

The Company's investment services, including advisory, customized investment management, trust and brokerage services, provide for additional income diversification. The Company's investment advisory and management services channel derives revenues primarily from investment management fees based on assets under management. The Company's brokerage services channel revenue is split between fees based on assets under management and commissions. Management believes that the Company's investment services are distinguished from the competition by a client-centric open architecture approach in which clients work with a dedicated portfolio manager to hand-select funds with styles that match the client's investment goals. The Company's goal is to design and maintain portfolios that provide the income, growth potential, and risk tolerances that match the clients' comfort levels and exceeds their financial expectations. The Company's investment advisory team consists of a variety of certified financial and licensed brokerage professionals adept in a number of financial and investment disciplines dedicated to providing personalized investment service to each client.

Management continues to undertake significant strategic initiatives, including investments in employee training and development, marketing and public relations, technology and electronic delivery methods, ongoing improvements and renovations of existing facilities and the continued development of recently added branches.  Industry consolidation also provides management the opportunity to recruit experienced banking professionals with market knowledge who complement the Enterprise sales and service culture.  While management recognizes that such investments increase expenses in the short-term, Enterprise believes that such initiatives are a necessary investment in the long-term growth and earnings potential of the

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Company and help the Company to capitalize on opportunities in the current marketplace for community banks such as Enterprise. However, lower than expected returns on these investments, such as slower than anticipated loan and deposit growth in new branches and/or lower than expected fee or other income generated from new technology or initiatives, could decrease anticipated revenues and net income on such investments in the future.

Any prolonged deterioration of the general economic environment in the national or local New England economy could have adverse repercussions on local industries, leading to increased unemployment and mortgage foreclosures, deterioration of local commercial real estate values, and other unforeseen consequences, which could have a severe negative impact on the Company's financial condition, capital position, liquidity, and performance. In addition, the loan portfolio consists primarily of commercial real estate, commercial and industrial, and commercial construction loans.  These types of loans are typically larger and are generally viewed as having more risk of default than owner occupied residential real estate loans or consumer loans. Any significant deterioration in the credit quality of the commercial loan portfolio or underlying collateral values due to a downturn in the economic environment could have a material adverse effect on the Company's financial condition and results of operations. The risk of loss due to customers' non-payment of loans or lines of credit is called "credit risk."  Credit risk management is reviewed below in this Item 2 under the headings "Credit Risk," "Asset Quality" and "Allowance for Loan Losses."

The value of the investment portfolio as a whole, or individual securities held, including restricted FHLB capital stock, could be negatively impacted by any sustained volatility in the financial markets or in credit markets, or fundamental deterioration in credit quality of the individual security, fund or issuer, which could possibly result in the recognition of additional other-than-temporary-impairment ("OTTI") charges in the future.

A decline in the aggregate balance of the assets under management could decrease investment advisory fee income. The Company's ability to maintain or increase investment assets under management is subject to a number of factors, including competition from investment management companies and alternative investment options, fluctuations in financial markets and various economic conditions, among others.

In addition, a sustained low interest rate environment could negatively impact the Company's net interest income and results of operations. Interest rate risk is reviewed in more detail under the heading Item 3, "Quantitative and Qualitative Disclosures About Market Risk," below.

Liquidity management is the coordination of activities so that cash needs are anticipated and met, readily and efficiently.  Liquidity management is reviewed further below in this Item 2 under the heading "Liquidity."

Federal banking agencies require the Company and the Bank to meet minimum capital requirements. Effective January 1, 2015, the Company and the Bank implemented the Basel III regulatory capital framework. For information regarding the current capital requirements applicable to the Company and the Bank and their respective capital levels at March 31, 2016, see the section entitled "Capital Resources" contained in this Item 2 below. At March 31, 2016, both the Company and the Bank were categorized as "well capitalized;" however, future unanticipated charges against capital, or changes in regulatory requirements such as the phase-in requirements under Basel III, could impact those regulatory capital designations.

In addition, any further changes in government regulation or oversight, including, but not limited to, the implementation by the federal regulatory agencies of the various requirements contained in the Dodd-Frank Act and new consumer financial protection laws enacted by the Consumer Financial Protection Bureau, could affect the Company in substantial and unpredictable ways, including, but not limited to, subjecting the Company to additional operating, governance and compliance costs, potentially influencing the Company's business decisions, or causing potential loss of revenue due to the impact of an enhanced regulatory structure on the banking industry as a whole.

Compliance risk includes the threat of fines, civil money penalties, lawsuits and restricted growth opportunities resulting from violations and/or non-conformance with laws, rules, regulations, prescribed practices, internal policies and procedures, or ethical standards.  The Company maintains a Compliance Management Program (the "CMP") designed to meet regulatory and legislative requirements.  The CMP provides a framework for tracking and implementing regulatory changes, monitoring the effectiveness of policies and procedures, conducting compliance risk assessments, and educating employees in matters relating to regulatory compliance.  The Audit Committee of the Board of Directors oversees the effectiveness of the CMP.

Operational risk includes the threat of loss from inadequate or failed internal processes, people, systems or external events, due to, among other things: fraud or error; the inability to deliver products or services; failure to maintain a competitive position; lack of information security, cyber security or physical security; inadequate procedures or controls followed by third-party service providers; or violations of ethical standards. In addition to intensive and ongoing employee training and awareness

39

campaigns, controls to manage operational risk include, but are not limited to, technology administration, information security, third-party management, and disaster recovery and business continuity planning. The Banking Technology Steering Committee of the Board of Directors oversees the information security program, monitors the results of third-party testing and risk assessments, and responses to breaches of customer data, among other technology, security and business continuity related functions.

The Company's technology administration includes policies and guidelines for the design, procurement, installation, management and acceptable use of hardware, software and network devices. The Company's technology project standards are designed to provide risk based oversight, coordinate and communicate ideas, and to prioritize and manage project implementation in a manner consistent with corporate objectives.

The Company has implemented layered security approaches for all delivery channels to mitigate rising cyber-security risks. Management utilizes a combination of third-party information security assessments, key technologies and ongoing internal evaluations to provide a level of protection of non-public personal information and to continually monitor and attempt to safeguard information on its operating systems and those of third-party service providers.  The Company also utilizes firewall technology and a combination of software and third-party monitoring to detect intrusion, guard against unauthorized cyber access, and continuously identify and prevent computer viruses on the Company's information systems.

The Company has a third-party risk management program designed to provide a mechanism to enable management to determine what risk, if any, a particular vendor or customer exposes the Company to, and to rate and mitigate that risk by properly performing initial and ongoing due diligence when selecting or maintaining relationships with critical third-party providers and customers who in turn provide financial services or products to their own customers.

The Company's Disaster Recovery and Business Continuity Program consists of the information and procedures required to enable a rapid recovery from an occurrence that would disable the Company's operations for an extended period, due to circumstances such as: loss of personnel; loss of data and/or loss of facilities, under various scenarios, including unintentional, malicious or criminal intentions; or loss of access to, or the physical destruction or damage of, facilities, infrastructure or systems. The plan, which is reviewed annually, establishes responsibility for assessing a disruption of business, contains alternative strategies for the continuance of critical business functions during an emergency situation, assigns responsibility for restoring services, and sets priorities by which critical services will be restored.  A bank-owned and maintained secondary data center location provides the Company back-up network processing capabilities and flexibility to relocate key operational personnel if needed.

The Company has developed Incident Response Policy and Procedures in order to guide its actions in responding to real and suspected information security incidents. This includes unlawful, unauthorized, or unacceptable actions that involve a computer system or a computer network such as Denial of Service attacks, Corporate Account Takeover schemes, or an event that has potentially compromised customers' non-public personal information. Additionally, an event that disrupts one of the Bank's service channels, whether as a result of a security incident or not, is also considered an incident requiring a response under this program. The reaction to an incident aims to reduce potential damage and loss and to protect and restore confidence through timely communication and the restoration of normal operating conditions for computers, services and information.

Any system of controls or contingency plan, however well designed and operated, is based in part on certain assumptions and can provide only reasonable, not absolute, assurances that the objectives of the controls and procedures will be met. Any breakdown in the integrity of these information systems, infrastructure, or cyber-security measures, or the Company's inability to identify, respond and correct such breakdown, could result in a loss of customer business, expose customers' personal information to unauthorized parties, damage the Company's reputation, subject the Company to increase costs and additional regulatory scrutiny, and expose the Company to civil litigation and possible financial liability, any of which could have a material adverse effect on the Company's business, financial condition and results of operations.

This Opportunities and Risks discussion should be read in conjunction with Item 1A "Risk Factors," and the section titled "Opportunities and Risk" contained in Item 7 "Management's Discussion and Analysis of Financial Conditions and Results of Operations" included in the Company's 2015 Annual Report on Form 10-K, which address numerous other factors and details that could adversely affect the Company's business, reputation, its future results of operations and financial condition.

Accounting Policies/Critical Accounting Estimates

As discussed in the Company's 2015 Annual Report on Form 10-K, the three most significant areas in which management applies critical assumptions and estimates that are particularly susceptible to change relate to the determination of the

40

allowance for loan losses, impairment review of investment securities and the impairment review of goodwill.  The Company has not changed its significant accounting and reporting policies from those disclosed in its 2015 Annual Report on Form 10-K.

Financial Condition

Total assets increased $19.1 million, or 1%, since December 31, 2015, to $2.30 billion at March 31, 2016.  The balance sheet composition and changes since December 31, 2015 are discussed below.

Cash and cash equivalents

Cash and cash equivalents is comprised of cash on hand and cash items due from banks, interest-earning deposits (deposit accounts, excess cash balances, money markets, and money market mutual funds accounts) and fed funds sold. Cash and cash equivalents amounted to 3% of total assets at March 31, 2016, compared to 2% at December 31, 2015. Balances in cash and cash equivalents will fluctuate due primarily to the timing of net deposit flows, borrowing and loan inflows and outflows, investment purchases and maturities, calls and sales proceeds, and the immediate liquidity needs of the Company.

Investments

At March 31, 2016, the carrying value of the investment portfolio amounted to $304.9 million, an increase of $4.6 million, or 2%, since December 31, 2015. 

The following table summarizes investments at the dates indicated:

	March 31, 2016				December 31, 2015				March 31, 2015
(Dollars in thousands)	Amount		Percent		Amount		Percent		Amount		Percent
Federal agency obligations(1)	$	79,718	26.2	%	$	78,825	26.3	%	$	60,447	25.2	%
Residential federal agency MBS(1)	72,729		23.8	%	74,863		24.9	%	86,040		35.8	%
Commercial federal agency MBS(1)	27,785		9.1	%	23,545		7.8	%	—		—	%
Municipal securities	99,925		32.8	%	98,511		32.8	%	74,583		31.1	%
Corporate bonds	10,383		3.4	%	10,206		3.4	%	8,194		3.4	%
Certificates of deposits(2)	1,960		0.6	%	2,751		0.9	%	—		—	%
Total fixed income securities	292,500		95.9	%	288,701		96.1	%	229,264		95.5	%
Equity investments	12,446		4.1	%	11,657		3.9	%	10,804		4.5	%
Total available-for-sale investments at fair value	$	304,946	100.0	%	$	300,358	100.0	%	$	240,068	100.0	%

__________________________________________ 

(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 federal agency MBS category were collateralized mortgage obligations (“CMOs”) totaling $20.0 million and $20.8 million at March 31, 2016 and December 31, 2015 respectively. All of the commercial MBS investments held by the Company were CMOs.

During the three months endedMarch 31, 2016, the Company purchased $7.0 million in securities and had principal pay downs, calls and maturities totaling $4.8 million. In addition, management sold a security with an amortized cost of approximately $304 thousand realizing net gains on sales of $2 thousand during the three months endedMarch 31, 2016.

Net unrealized gains on the investment portfolio amounted to $6.5 million at March 31, 2016 compared to $3.5 million and $7.0 million at December 31, 2015 and March 31, 2015, respectively. The Company attributes the increase in net unrealized gains in the current period primarily to the impact of decreases in current market yields. Unrealized gains or losses will only be

41

recognized in the statements of income if the investments are sold. However, should an investment be deemed "other than temporarily impaired," the Company is required to write-down the fair value of the investment.  

See also Note 2, "Investment Securities," and Note 11, "Fair Value Measurements," to the Company's unaudited consolidated interim financial statements contained in Item 1 above for further information regarding the Company's unrealized gains and losses on debt and equity securities, including information about investments in an unrealized loss position for which an other-than-temporary impairment has or has not been recognized, and investments pledged as collateral, as well as the Company's fair value measurements for available-for-sale securities.

Federal Home Loan Bank Stock

The Bank is required to purchase stock of the FHLB 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.  The carrying amount of FHLB stock was $2.8 million for the period ended March 31, 2016, $3.1 million at December 31, 2015 and $4.2 million at March 31, 2015.

See Note 1, "Summary of Significant Accounting Policies," Item (d), "Restricted Investments," to the Company's unaudited consolidated interim financial statements contained in Item 1 above for further information regarding the Company's investment in FHLB stock.

Loans

Total loans represented 81% of total assets at both March 31, 2016 and December 31, 2015.  Total loans increased $4.7 million, compared to December 31, 2015, and $182.6 million, or 11%, since March 31, 2015.  The mix of loans within the portfolio remained relatively unchanged with commercial loans amounting to approximately 86% of gross loans, reflecting a continued focus on commercial loan growth.

The following table sets forth the loan balances by certain loan categories at the dates indicated and the percentage of each category to gross loans.

	March 31, 2016					December 31, 2015					March 31, 2015
(Dollars in thousands)	Amount			Percent		Amount			Percent		Amount			Percent
Commercial real estate	$	936,907		50.2	%	$	936,921		50.3	%	$	860,765		51.1	%
Commercial and industrial	456,436			24.5	%	458,553			24.7	%	413,183			24.5	%
Commercial construction	207,214			11.1	%	202,993			10.9	%	169,264			10.1	%
Total commercial loans	1,600,557			85.8	%	1,598,467			85.9	%	1,443,212			85.7	%
Residential mortgages	170,585			9.1	%	169,188			9.1	%	148,909			8.8	%
Home equity loans and lines	84,665			4.5	%	83,373			4.4	%	81,852			4.9	%
Consumer	10,539			0.6	%	10,747			0.6	%	9,855			0.6	%
Total retail loans	265,789			14.2	%	263,308			14.1	%	240,616			14.3	%
Gross loans	1,866,346			100.0	%	1,861,775			100.0	%	1,683,828			100.0	%
Deferred fees, net	(1,654		)			(1,813		)			(1,708		)
Total loans	1,864,692					1,859,962					1,682,120
Allowance for loan losses	(29,910		)			(29,008		)			(27,803		)
Net loans	$	1,834,782				$	1,830,954				$	1,654,317

As of March 31, 2016, commercial real estate loans are relatively flat compared to December 31, 2015, and increased 9% compared to March 31, 2015.  Commercial real estate loans are typically secured by one-to-four and multi-family apartment buildings, office, industrial or mixed-use facilities, strip shopping centers or other commercial properties.

Commercial and industrial loans are relatively flat compared to December 31, 2015, and increased 10% as compared to March 31, 2015.  These 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.

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Commercial construction loans increased by $4.2 million, or 2%, since December 31, 2015, and increased 22% as compared to March 31, 2015. 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.

Retail loan balances increased by $2.5 million, or 1%, since December 31, 2015, and have increased by 10% since March 31, 2015.  The increase over the same period in the prior year was primarily within the residential mortgage portfolio.

At March 31, 2016, commercial loan balances participated out to various banks amounted to $53.1 million, compared to $52.7 million at December 31, 2015, and $46.4 million at March 31, 2015.  These balances participated out to other institutions are not carried as assets on the Company's financial statements. Commercial loans originated by other banks in which the Company is a participating institution are carried at the pro-rata share of ownership and amounted to $59.6 million, $62.3 million and $63.5 million at March 31, 2016, December 31, 2015, and March 31, 2015, respectively. In each case, the participating bank funds a percentage of the loan commitment and takes on the related pro-rata risk. 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. 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.

See Note 3, "Loans," to the Company's unaudited consolidated interim financial statements contained in Item 1 for information on loans serviced for others and loans pledged as collateral.

Credit Risk

The Company seeks to manage its loan portfolio to avoid concentration by industry and loan size to lessen its credit risk exposure.  However, inherent in the lending process is the risk of loss due to customer non-payment, or "credit risk."  The Company's commercial lending focus may entail significant additional risks compared to long-term financing on existing, owner-occupied residential real estate.  While the Company endeavors to minimize this risk through sound underwriting practices and the risk management function, management recognizes that loan losses will occur and that the amount of these losses will fluctuate depending on the risk characteristics of the loan portfolio and economic conditions.

The credit risk management function focuses on a wide variety of factors, including, among others, current and expected economic conditions, the real estate market, the financial condition of borrowers, the ability of borrowers to adapt to changing conditions or circumstances affecting their business and the continuity of borrowers' management teams.  Early detection of credit issues is critical to minimize credit losses. Accordingly, management regularly monitors these factors, among others, through ongoing credit reviews by the Credit Department, an external loan review service, reviews by members of senior management and the Loan Committee of the Board of Directors. This review includes the assessment of internal credit quality indicators such as the risk classification of 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.

The Company's loan risk rating system classifies loans depending on risk of loss characteristics.  The classifications range from "substantially risk free" for the highest quality loans and loans that are secured by cash collateral, to the more severe adverse classifications of "substandard," "doubtful" and "loss" based on criteria established under banking regulations.  Loans classified as "substandard" include those characterized by the distinct possibility that the Company will sustain some loss if the deficiencies are not corrected. Loans classified as "doubtful" have all the weaknesses inherent in a substandard rated loan with the added characteristic that the weaknesses make collection or full payment from liquidation, on the basis of currently existing facts, conditions, and values, highly questionable and improbable.  Loans classified as "loss" are generally considered uncollectible at present, although long term recovery of part or all of loan proceeds may be possible.  These "loss" loans would require a specific loss reserve or charge-off. Adversely classified loans may be accruing or in non-accrual status and may be additionally designated as restructured and/or impaired, or some combination thereof. Loans which are evaluated to be of weaker credit quality are reviewed on a more frequent basis by management.

Loans on which the accrual of interest has been discontinued are designated as non-accrual loans and are credit downgraded to one of the adversely classified categories noted above. Accrual of interest on loans is generally discontinued when a loan becomes contractually past due, with respect to interest or principal, by 90 days, or when reasonable doubt exists as to the full and timely collection of interest or principal. When a loan is placed on non-accrual status, all interest previously accrued but not collected is reversed against current period interest income. Interest accruals are resumed on such loans only when payments are brought current and have remained current for a period of 180 days or when, in the judgment of management, the

43

collectability of both principal and interest is reasonably assured.  Interest payments received on loans in a non-accrual status are generally applied to principal on the books of the Company.

Impaired loans are individually significant loans for which management considers it probable that not all amounts due (principal and interest) in accordance with original contractual terms will be collected.  The majority of impaired loans are included within the non-accrual balances; however, not every loan in non-accrual status has been designated as impaired. Impaired loans include loans that have been modified in a troubled debt restructuring (or "TDR", see below). Impaired loans exclude large groups of smaller-balance homogeneous loans, such as residential mortgage loans and consumer loans, which are collectively evaluated for impairment, and loans that are measured at fair value, unless the loan is amended in a TDR.

Management does not set any minimum delay of payments as a factor in reviewing for impaired classification.  Management considers the individual payment status, net worth and earnings potential of the borrower, and the value and cash flow of the collateral as factors to determine if a loan will be paid in accordance with its contractual terms.

Impaired loans are individually evaluated for credit loss and a specific reserve is assigned for the amount of the estimated probable credit loss. When a loan is deemed to be impaired, management estimates the credit loss by comparing the loan's carrying value against either 1) the present value of the expected future cash flows discounted at the loan's effective interest rate; 2) the loan's observable market price; or 3) the expected realizable fair value of the collateral, in the case of collateral dependent loans.  A specific allowance is assigned to the impaired loan for the amount of estimated probable credit loss. Impaired loans are charged off, in whole or in part, when management believes that the recorded investment in the loan is uncollectible.

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 otherwise not 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, 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. All loans that are modified are reviewed by the Company to identify if a TDR has occurred.  TDR loans are included in the impaired loan category and as such, these loans are individually reviewed and evaluated, and a specific reserve is assigned for the amount of the estimated probable credit loss.

An impaired or TDR loan classification will be considered for upgrade based on the borrower's sustained performance over time and their improving financial condition. Consistent with the criteria for returning non-accrual loans to accrual status, the borrower must demonstrate the ability to continue to service the loan in accordance with the original or modified terms and, in the judgment of management, the collectability of the remaining balances, both principal and interest, are reasonably assured. In the case of TDR loans having had a modified interest rate, that rate must be at, or greater than, a market rate for a similar credit at the time of modification for an upgrade to be considered.

Real estate acquired by the Company through foreclosure proceedings or the acceptance of a deed in lieu of foreclosure is classified as OREO. When property is acquired, it is generally recorded at the lesser of the loan's remaining principal balance, net of any unamortized deferred fees, or the estimated fair value of the property acquired, less estimated costs to sell, establishing a new cost basis. The estimated fair value is based on market appraisals and the Company's internal analysis. Any loan balance in excess of the estimated realizable fair value on the date of transfer is charged to the allowance for loan losses on that date. All costs incurred thereafter in maintaining the property, as well as subsequent declines in fair value are charged to non-interest expense.

Non-performing assets are comprised of non-accrual loans, deposit account overdrafts that are more than 90 days past due and OREO.  The designation of a loan or other asset as non-performing does not necessarily indicate that loan principal and interest will ultimately be uncollectible.  However, management recognizes the greater risk characteristics of these assets and therefore considers the potential risk of loss on assets included in this category in evaluating the adequacy of the allowance for loan losses.  Despite prudent loan underwriting, adverse changes within the Company's market area, or deterioration in local, regional or national economic conditions, could negatively impact the Company's level of non-performing assets in the future.

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Asset Quality

At March 31, 2016 and December 31, 2015, the Company had adversely classified loans (loans carrying "substandard," "doubtful" or "loss" classifications) amounting to $24.4 million and $24.8 million, respectively. Total adversely classified loans amounted to 1.31% of total loans at March 31, 2016 as compared to 1.33% at December 31, 2015 The decrease in adversely classified balances was due primarily to several larger commercial relationships that paid off, in addition to principal payments, partially offset by additional credit downgrades during the period.

Adversely classified loans which were performing but possessed potential weaknesses and, as a result, could ultimately become non-performing loans amounted to $13.5 million at March 31, 2016 and $11.3 million at December 31, 2015.  The remaining balances of adversely classified loans were non-accrual loans, amounting to $10.9 million and $13.4 million at March 31, 2016 and December 31, 2015, respectively.  Non-accrual loans which were not adversely classified amounted to $337 thousand and $402 thousand at March 31, 2016 and December 31, 2015, respectively, and primarily represented the guaranteed portions of non-performing SBA loans.

The following table sets forth information regarding non-performing assets, TDR loans and delinquent loans 60-89 days past due as to interest or principal, held by the Company at the dates indicated:

(Dollars in thousands)	March 31, 2016			December 31, 2015			March 31, 2015
Non-Accrual loan summary:
Commercial real estate	$	6,188		$	8,506		$	10,324
Commercial and industrial	4,106			4,323			6,437
Commercial construction	213			335			485
Residential	307			366			503
Home equity	424			288			233
Consumer	18			19			42
Total non-accrual loans	11,256			13,837			18,024
Overdrafts > 90 days past due	8			8			11
Total non-performing loans	11,264			13,845			18,035
OREO	—			—			114
Total non-performing assets	$	11,264		$	13,845		$	18,149
Total Loans	$	1,864,692		$	1,859,962		$	1,682,120
Accruing TDR loans not included above	$	10,266		$	10,053		$	10,640
Delinquent loans 60-89 day past due	$	1,208		$	2,021		$	37
Non-performing loans to total loans	0.60		%	0.74		%	1.07		%
Non-performing assets to total assets	0.49		%	0.61		%	0.88		%
Loans 60-89 days past due to total loans	0.06		%	0.11		%	—		%
Adversely classified loans to total loans	1.31		%	1.33		%	1.78		%
Allowance for loan losses	$	29,910		$	29,008		$	27,803
Allowance for loan losses to non-performing loans	265.54		%	209.52		%	154.16		%
Allowance for loan losses to total loans	1.60		%	1.56		%	1.65		%

The net decrease in total non-performing loans, and the resulting decrease in the ratio of non-performing loans as a percentage of total loans outstanding, was due primarily to payoffs and paydowns primarily within the commercial real estate portfolio ($2.3 million). The majority of non-accrual loans were also carried as impaired loans during the periods and the changes since are discussed further below.

Total impaired loans amounted to $21.4 million and $23.7 million at March 31, 2016 and December 31, 2015, respectively.  Total accruing impaired loans amounted to $10.3 million and $10.1 million at March 31, 2016 and December 31, 2015, respectively, while non-accrual impaired loans amounted to $11.1 million and $13.6 million as of March 31, 2016 and December 31, 2015, respectively.

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In management's opinion, the majority of impaired loan balances at March 31, 2016 and December 31, 2015 were supported by expected future cash flows or, for those collateral dependent loans, the net realizable value of the underlying collateral. Based on management's assessment at March 31, 2016, impaired loans totaling $15.9 million required no specific reserves and impaired loans totaling $5.5 million required specific reserve allocations of $2.1 million.  At December 31, 2015, impaired loans totaling $19.1 million required no specific reserves and impaired loans totaling $4.6 million required specific reserve allocations of $1.8 million.  Management closely monitors these relationships for collateral or credit deterioration.

Total TDR loans included in the impaired loan figures above as of March 31, 2016 and December 31, 2015 were $15.6 million and $17.1 million, respectively.  TDR loans on accrual status amounted to $10.3 million and $10.1 million at March 31, 2016 and December 31, 2015, respectively. TDR loans included in non-performing loans amounted to $5.3 million and $7.1 million at March 31, 2016 and December 31, 2015, respectively.  The Company continues to work with 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 current economic environment.

The Company carried no OREO at March 31, 2016 or December 31, 2015. There were no sales on OREO during the three months endedMarch 31, 2016; there were also no additions to OREO, or subsequent impairment write-downs during the period. During the three months endedMarch 31, 2015, the Company recorded $154 thousand of net gains on OREO sales; however there were no subsequent write downs of OREO during that period.

Management believes that the loan portfolio continued to experience a level of modest credit stabilization during the 2015 period. However, management believes that the general credit profile of the portfolio and individual commercial relationships will continue to be affected by lagging effects that the economic environment has had on the regional and local commercial markets.

Allowance for Loan Losses

On a quarterly basis, management prepares an estimate of the allowance necessary to cover estimated probable credit losses.  The allowance for loan losses is an estimate of probable credit risk inherent in the loan portfolio as of the specified balance sheet dates.  The Company maintains the allowance at a level that it deems adequate to absorb all reasonably anticipated probable losses from specifically known and other credit risks associated with the portfolio.

In making its assessment on the adequacy of the allowance, management considers several quantitative and qualitative factors that could have an effect on the credit quality of the portfolio including individual assessment of larger and high risk credits, delinquency trends and the level of non-performing loans, impaired and restructured loans, net charge-offs, the growth and composition of the loan portfolio, expansion in geographic market area, the experience level of lenders and changes in underwriting criteria, and the strength of the local and national economy, among other factors.  Except for loans specifically identified as impaired, as discussed above, the estimate is a two-tiered approach that allocates loan loss reserves to "regulatory problem assets" loans by classified credit rating and to non-classified loans by credit type.  The general loss allocations take into account the quantitative historic loss experience, qualitative factors such as those identified above, as well as regulatory guidance and industry data. The allowance for loan losses is established through a provision for loan losses, which is a direct charge to earnings.  Loan losses are charged against the allowance when management believes that the collectability of loan principal is unlikely.  Recoveries on loans previously charged off are credited to the allowance.

Management closely monitors the credit quality of individual delinquent and non-performing relationships, industry concentrations, the local and regional real estate market and current economic conditions.  The level of delinquent and non-performing assets is largely a function of economic conditions and the overall banking environment.  Despite prudent loan underwriting, adverse changes within the Company's market area, or deterioration in the local, regional or national economic conditions could negatively impact the Company's level of non-performing assets in the future.

Management continues to closely monitor the non-performing assets, charge-offs and necessary allowance levels, including specific reserves. The allowance for loan losses to total loans ratio was 1.60% at March 31, 2016, 1.56% at December 31, 2015, and 1.65% at March 31, 2015. The decline in the allowance ratio reflects the generally improving credit quality of the loan portfolio due, in part, to improved economic conditions. However, in the current period, the credit ratings of three larger commercial relationships were downgraded to "criticized" or "adverse" risk-ratings, based on a review of their individual business circumstances, requiring higher levels of reserves in the current period which increased the allowance to total loan ratio compared to December 31, 2015.

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Based on the foregoing, as well as management's judgment as to the existing credit risks inherent in the loan portfolio, as discussed above under the headings "Credit Risk" and "Asset Quality," 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 March 31, 2016.

The following table summarizes the activity in the allowance for loan losses for the periods indicated:

	Three Months Ended March 31,
(Dollars in thousands)	2016			2015
Balance at beginning of year	$	29,008		$	27,121
Provision charged to operations	850			625
Recoveries on charged-off loans:
Commercial real estate	19			5
Commercial and industrial	129			84
Commercial construction	—			13
Residential	—			—
Home equity	—			—
Consumer	2			8
Total recoveries	150			110
Charged-off loans
Commercial real estate	—			—
Commercial and industrial	72			17
Commercial construction	5			—
Residential	—			—
Home equity	5			—
Consumer	16			36
Total Charged off	98			53
Net loans charged-off	(52		)	(57		)
Ending Balance	$	29,910		$	27,803
Annualized net loans charged-off: Average loans outstanding	(0.01		)%	(0.01		)%

Refer to "Credit Risk," "Asset Quality" and "Allowance for Loan Losses" contained in Item 7, "Management's Discussion and Analysis of Financial Condition and Results of Operations," included in the Company's 2015 Annual Report on Form 10-K for additional information regarding the Company's credit risk management process and allowance for loan losses.

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Deposits

The following table sets forth the deposit balances by certain categories at the dates indicated and the percentage of each category to total deposits.

	March 31, 2016				December 31, 2015				March 31, 2015
(Dollars in thousands)	Amount		Percent		Amount		Percent		Amount		Percent
Non-interest bearing demand deposits	$	599,282	28.7	%	$	570,589	28.3	%	$	483,768	25.9	%
Interest bearing checking	313,314		15.0	%	313,674		15.5	%	283,365		15.2	%
Total checking	912,596		43.7	%	884,263		43.8	%	767,133		41.1	%
Savings	179,127		8.6	%	167,304		8.3	%	166,891		9.0	%
Money markets	735,492		35.2	%	692,114		34.3	%	632,975		33.9	%
Total savings/money markets	914,619		43.8	%	859,418		42.6	%	799,866		42.9	%
Certificates of deposit	171,234		8.2	%	167,697		8.3	%	178,939		9.6	%
Total non-brokered deposits(1)	1,998,449		95.7	%	1,911,378		94.7	%	1,745,938		93.6	%
Brokered deposits	89,288		4.3	%	106,770		5.3	%	119,356		6.4	%
Total deposits	$	2,087,737	100.0	%	$	2,018,148	100.0	%	$	1,865,294	100.0	%

(1) Includes reciprocal money market deposits and CDs received from participating banks in nationwide networks as a result of our customers electing to participate in programs to obtain full FDIC insurance. Essentially, the equivalent of the original deposit comes back to the Company as non-brokered deposits within the appropriate category under total deposits on the balance sheet.

As of March 31, 2016, deposits, excluding brokered deposits, increased $87.1 million, or 5%, since December 31, 2015, and $252.5 million, or 14%, since March 31, 2015. Non-brokered deposit growth since December 31, 2015 occurred in all deposit categories with the largest growth noted in money markets.

Wholesale funding, which includes brokered deposits and borrowed funds, amounted to $90.0 million at March 31, 2016, compared to $160.4 million at December 31, 2015, a decrease of $70.5 million, or 44%.

From time to time, management utilizes brokered deposits as cost effective wholesale funding sources to support continued loan growth and as part of the Company's asset-liability management strategy to protect against rising rates. Brokered deposits may be comprised of overnight money market deposits and selected term CDs gathered from nationwide bank networks or from large money center banks, however, at March 31, 2016, December 31, 2015, and March 31, 2015 brokered deposits were comprised only of brokered CDs. Brokered CDs decreased $17.5 million, or 16%, during the three months endedMarch 31, 2016, and the Company's level of borrowed funds have also declined over the same period as deposit balances have grown. Brokered CDs outstanding at March 31, 2016 had a weighted average remaining life of approximately 1.6 years.

Borrowed Funds and Subordinated Debt

Borrowed funds amounted to $671 thousand at March 31, 2016, compared to $53.7 million at December 31, 2015 and $900 thousand at March 31, 2015. At March 31, 2016 and March 31, 2015, borrowed funds consisted of FHLB borrowings only. At December 31, 2015 the borrowed funds balance was comprised of FHLB borrowings of $40.7 million and Other borrowings, which represented an overnight borrowing with a correspondent bank, totaling $13.0 million. Borrowed fund balances have declined $53.0 million, since year end as deposits have grown.

At March 31, 2016, the Bank had the capacity to borrow additional funds from the FHLB of up to approximately $410.0 million and capacity to borrow from the FRB Discount Window of approximately $105.0 million.

The Company also had $14.8 million of outstanding subordinated debt at March 31, 2016, December 31, 2015 and March 31, 2015. At each of these periods, the subordinated debt consisted of $15.0 million in aggregate principal amount of Fixed-to-Floating Rate Subordinated Notes (the "Notes") issued in January 2015, in a private placement to an accredited investor. The Notes, which are intended to qualify as Tier 2 capital for regulatory purposes, mature on January 30, 2030 (the "Maturity Date") and are callable by the Company, subject to regulatory approval, at a premium beginning January 30, 2020 and at par

48

beginning January 30, 2025. The Notes pay interest at a fixed rate of 6.00% per annum through January 30, 2025 and beginning on January 31, 2025 through the Maturity Date, or any early redemption date, the interest rate on the Notes will adjust monthly at an interest rate of 3.90% plus 30-day LIBOR. Original debt issuance costs were $190 thousand and have been netted against the subordinated debt on the balance sheet in accordance with recent accounting guidance which the Company adopted in the first quarter of 2015. These costs are being amortized over the life of the Notes.

Prior to the end of March 2015, the subordinated debt balance carried on the balance sheet consisted of $10.8 million in Junior Subordinated Debt Securities (the "Debt"), at a rate of 10.88%. In March 2015, the Company paid off the Debt using proceeds from the $15.0 million in Notes issued in January 2015.

Liquidity

Liquidity is the ability to meet cash needs arising from, among other things, fluctuations in loans, investments, deposits and borrowings.  Liquidity management is the coordination of activities so that cash needs are anticipated and met readily and efficiently.  Prior to March 2016, the Company's liquidity policies were set and monitored by the Company's Asset-Liability Committee of the Board of Directors ("ALCO").  In March 2016, ALCO was merged into the full Board. The Company's asset-liability objectives are to engage in sound balance sheet management strategies, maintain liquidity, provide and enhance access to a diverse and stable source of funds, provide competitively priced and attractive products to customers and conduct funding at a low cost relative to current market conditions.  Funds gathered are used to support current commitments, to fund earning asset growth, and to take advantage of selected leverage opportunities.

The Company's liquidity is maintained by projecting cash needs, balancing maturing assets with maturing liabilities, monitoring various liquidity ratios, monitoring deposit flows, maintaining cash flow within the investment portfolio, and maintaining wholesale funding resources. 

At March 31, 2016, the Company's wholesale funding sources included borrowing capacity at the FHLB and brokered deposits. In addition, the Company maintains fed fund purchase arrangements with correspondent banks and access to the FRB Discount Window.

Management believes that the Company has adequate liquidity to meet its obligations. However, if, as a result of general economic conditions or other events, these sources of external funding become restricted or are eliminated, the Company may not be able to raise adequate funds or may incur substantially higher funding costs or operating restrictions in order to raise the necessary funds to support the Company's operations and growth.

The Company has in the past also increased capital and liquidity by offering shares of the Company's common stock for sale to its existing stockholders and new investors.

Capital Resources

The Company believes its current capital is adequate to support ongoing operations.  As of March 31, 2016, both the Company and the Bank qualify as "well capitalized" under applicable regulations of Basel III, the Federal Reserve Board and the FDIC. 

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Effective January 1, 2015, the Company and the Bank implemented the Basel III regulatory capital framework. The current regulatory requirements, and the Company's and the Bank's actual capital amounts and ratios are presented as of March 31, 2016 in the tables below.

	Actual				Minimum Capital for Capital Adequacy Purposes				Minimum Capital To Be Well Capitalized
(Dollars in thousands)	Amount		Ratio		Amount		Ratio		Amount		Ratio
The Company
Total Capital (to risk weighted assets)	$	216,511	10.97	%	$	157,927	8.00	%	$	197,409	10.00	%
Tier 1 Capital (to risk weighted assets)	$	176,281	8.93	%	$	118,446	6.00	%	$	157,927	8.00	%
Tier 1 Capital (to average assets) or Leverage ratio	$	176,281	7.76	%	$	90,859	4.00	%	N/A		N/A		*
Common equity tier 1 capital to risk weighted assets	$	176,281	8.93	%	$	88,834	4.50	%	$	128,316	6.50	%
The Bank
Total Capital (to risk weighted assets)	$	214,016	10.84	%	$	157,927	8.00	%	$	197,409	10.00	%
Tier 1 Capital (to risk weighted assets)	$	188,611	9.55	%	$	118,445	6.00	%	$	157,927	8.00	%
Tier 1 Capital (to average assets) or Leverage ratio	$	188,611	8.30	%	$	90,857	4.00	%	$	113,571	5.00	%
Common equity tier 1 capital to risk weighted assets	$	188,611	9.55	%	$	88,834	4.50	%	$	128,316	6.50	%

__________________________________________

* For the Bank to qualify as "well capitalized," it must maintain a leverage capital ratio (Tier 1 capital to average assets) of at least 5%.  This requirement does not apply to the Company.

Under Basel III, capital ratio requirements for all banking organizations have increased and include a "capital conservation buffer," which is being phased in through 2019, and is in addition to each capital ratio. If a banking organization dips into its capital conservation buffer it may be restricted in its ability to pay dividends and discretionary bonus payments to its executive officers. Although community banks began complying with the Basel III rules on January 1, 2015, as previously noted above, there is a phase in period for several aspects, including the capital conservation buffer, which began in January 2016 and extends to January 2019. The capital conservation buffer requirement began to be phased in beginning in January 2016 at 0.625% of risk-weighted assets and will increase by that amount each year until fully implemented in January 2019.

The Basel III minimum capital ratio requirements as applicable to the Company and the Bank in 2019 after the full phase-in period are summarized in the table below:

	Basel III Minimum for Capital Adequacy Purposes	Basel III Additional Capital Conservation Buffer	Basel III "Adequate" Ratio with Capital Conservation Buffer
Total Risk Based Capital (total capital to risk weighted assets)	8.00%	2.50%	10.50%
Tier 1 Risk Based Capital (tier 1 to risk weighted assets)	6.00%	2.50%	8.50%
Tier 1 Leverage Ratio (tier 1 to average assets)	4.00%	—%	4.00%
Common Equity Tier 1 Risk Based to risk weighted assets	4.50%	2.50%	7.00%

The Company has a shelf registration statement, which became effective on September 24, 2013, that registers the offering and sale of the Company’s common stock, rights to purchase common stock or preferred stock (or any combination thereof). The shelf registration statement provides the Company with the flexibility to raise, over a three year period, up to $40 million in capital to position the Company to take advantage of future growth and market share opportunities.

Although the Company believes its current capital is adequate to support ongoing operations, on April 21, 2016, the Company commenced a subscription rights offering to the Company’s stockholders, together with a supplemental community offering, with the intention of raising up to $10 million in gross proceeds. The Company has the ability to accept oversubscription requests in the rights offering and/or to facilitate sales of shares to new investors in the community offering resulting in gross proceeds of up to $12 million. All shares sold in the offerings will sold at a per share price of $21.50. Subject to early termination or extension at the sole discretion of the Company, the rights offering is scheduled to expire on May 27, 2016 and the supplemental community offering is scheduled to expire on June 10, 2016. The Company intends to use the net proceeds

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from the offerings to support future asset growth and for various corporate purposes. The Company is using its existing shelf registration statement in connection with the offerings.

The Company maintains a dividend reinvestment plan and direct stock purchase plan (the "DRSPP"). The DRSPP enables stockholders, at their discretion, to elect to reinvest cash dividends paid on their shares of the Company's common stock by purchasing additional shares of common stock from the Company at a purchase price equal to fair market value.  Under the DRSPP, stockholders and new investors also have the opportunity to purchase shares of the Company's common stock without brokerage fees, subject to monthly minimums and maximums.

For the three months endedMarch 31, 2016, the Company paid $1.4 million in cash dividends. Stockholders utilized the dividend reinvestment portion of the DRSPP to purchase an aggregate of 14,588 shares of the Company's common stock totaling $336 thousand. The direct purchase component of the DRSPP was used to purchase 533 shares of the Company's common stock totaling $12 thousand during the three months endedMarch 31, 2016.

On April 19, 2016, the Company announced a quarterly dividend of $0.13 per share to be paid on June 1, 2016 to stockholders of record as of May 11, 2016. The 2016 dividend rate represents a 4.0% increase over the 2015 dividend rate.

Investment Assets Under Management

The Company provides a wide range of investment advisory and wealth management services, including brokerage, trust, and investment management (together, "investment advisory services").  Also included in the investment assets under management total are customers' commercial sweep arrangements that are invested in third-party money market mutual funds.

The following table sets forth the fair market value of investment assets under management by certain categories at the dates indicated.

(Dollars in thousands)	March 31, 2016		December 31, 2015		March 31, 2015
Investment advisory and management services	$	523,926	$	519,041	$	553,918
Brokerage and management services	161,363		157,171		153,061
Total investment advisory assets	685,289		676,212		706,979
Commercial sweep accounts	3,005		2,165		810
Investment assets under management	$	688,294	$	678,377	$	707,789

Investment assets under management increased $9.9 million, or 1%, since December 31, 2015 and have decreased by $19.5 million, or 3%, since March 31, 2015.  Market volatility has been the primary driver in these fluctuations.

Total assets under management, which includes total assets, investment assets under management, and loans serviced for others amounted to $3.06 billion at March 31, 2016, $3.04 billion at December 31, 2015, and $2.84 billion at March 31, 2015. Investment assets under management and loans serviced for others are not carried as assets on the Company's balance sheet.

Results of Operations

Three Months Ended March 31, 2016 vs. Three Months Ended March 31, 2015

Unless otherwise indicated, the reported results are for the three months ended months ended March 31, 2016 with the "same period," the "comparable period," "prior year," and "prior period" being the three months ended months ended March 31, 2015. Average yields are presented on a tax equivalent basis.

The Company's net income for the three months endedMarch 31, 2016 amounted to $4.3 million compared to $3.6 million for the same period in 2015, an increase of $693 thousand, or 19%.  Diluted earnings per share were $0.41 and $0.35 for the three months endedMarch 31, 2016 and March 31, 2015, respectively, an increase of 17%.

The Company’s growth contributed to increases in net interest income and non-interest expenses. This growth and other items impacting the Company’s net income are discussed further below.

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Net Interest Income

The Company's net interest income for the three months endedMarch 31, 2016 was $21.1 million compared to $18.5 million for the three months ended months ended March 31, 2015, an increase of $2.6 million, or 14%.  The increase in net interest income over the comparable year-to-date period was due primarily to revenue generated from loan growth.

Net Interest Margin

The Company's margin was 4.02% for the three months endedMarch 31, 2016, compared to 3.97% and 3.95% for the three months endedDecember 31, 2015 and March 31, 2015, respectively.

Rate / Volume Analysis

The following table sets forth the extent to which changes in interest rates and changes in the average balances of interest-earning assets and interest-bearing liabilities have affected interest income and expense during the three months endedMarch 31, 2016 compared to the three months endedMarch 31, 2015.  For each category of interest-earning assets and interest-bearing liabilities, information is provided on changes attributable to: (1) volume (change in average portfolio balance multiplied by prior period average rate); (2) interest rate (change in average interest rate multiplied by prior period average balance); and (3) rate and volume (the remaining difference).

				Increase (decrease) due to
(Dollars in thousands)	Net Change			Volume			Rate			Rate/ Volume
Interest Income
Loans and loans held for sale	$	2,299		$	2,039		$	186		$	74
Investment securities	315			402			36			(123		)
Other interest earning assets (1)	12			(7		)	24			(5		)
Total interest earnings assets	2,626			2,434			246			(54		)
Interest Expense
Interest checking, savings and money market	85			71			25			(11		)
Certificates of deposit	10			(19		)	31			(2		)
Brokered CDs	1			(30		)	36			(5		)
Borrowed funds	42			19			12			11
Subordinated debt	(141		)	(67		)	(87		)	13
Total interest-bearing deposits, borrowed funds and subordinated debt	(3		)	(26		)	17			6
Change in net interest income	$	2,629		$	2,460		$	229		$	(60	)

_________________________________

(1) Other interest-earning assets includes interest-earning deposits, fed funds sold, and dividends on FHLB Stock.

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The following table presents the Company's average balance sheet, net interest income and average rates for the three months ended months ended March 31, 2016 and 2015. 

AVERAGE BALANCES, INTEREST AND AVERAGE YIELDS

	Three months ended March 31, 2016						Three months ended March 31, 2015
(Dollars in thousands)	Average Balance		Interest		Average Yield(1)		Average Balance		Interest		Average Yield(1)
Assets:
Loans and loans held for sale (2)	$	1,864,309	$	20,881	4.56	%	$	1,683,330	$	18,582	4.51	%
Investments (3)	298,576		1,540		2.70	%	237,612		1,225		2.64	%
Other interest earning assets (4)	17,329		44		1.03	%	22,287		32		0.58	%
Total interest earnings assets	2,180,214		22,465		4.28	%	1,943,229		19,839		4.24	%
Other assets	98,213						91,953
Total assets	$	2,278,427					$	2,035,182
Liabilities and stockholders' equity:
Int chkg, savings and money market	$	1,179,854	605		0.21	%	$	1,037,120	520		0.20	%
Certificates of deposit	164,631		261		0.64	%	178,296		251		0.57	%
Brokered CDs	96,257		222		0.93	%	111,739		221		0.80	%
Borrowed funds	46,884		63		0.54	%	24,596		21		0.34	%
Subordinated debt (5)	14,823		231		6.26	%	18,120		372		8.20	%
Total interest-bearing funding	1,502,449		1,382		0.37	%	1,369,871		1,385		0.41	%
Net interest rate spread					3.91	%					3.83	%
Demand deposits	577,370		—				480,574		—
Total deposits, borrowed funds and subordinated debt	2,079,819		1,382		0.27	%	1,850,445		1,385		0.30	%
Other liabilities	14,683						15,425
Total liabilities	2,094,502						1,865,870
Stockholders' equity	183,925						169,312
Total liabilities and stockholders' equity	$	2,278,427					$	2,035,182
Net interest income			$	21,083					$	18,454
Net interest margin (tax equivalent)					4.02	%					3.95	%

_______________________________

(1) Average yields are presented on a tax equivalent basis.  The tax equivalent effect associated with loans and investments, which was not included in the interest amount above, was $752 thousand for the three months endedMarch 31, 2016 and $518 thousand for the comparable period in 2015.

(2) Average loans and loans held for sale include non-accrual loans and are net of average deferred loan fees.

(3) Average investment balances are presented at average amortized cost.

(4) Average other interest earning assets includes interest-earning deposits, fed funds sold, and FHLB stock.

(5) The subordinated debt issued in January 2015 is net of average deferred debt issuance costs.

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Interest and Dividend Income

Total interest and dividend income amounted to $22.5 million for the three months endedMarch 31, 2016, an increase of $2.6 million, or 13%, compared to the prior period.  The increase resulted primarily from an increase of $237.0 million, or 12%, in the average balance of interest earning assets. The yield on interest earning assets also increased 4 basis points.

Interest income on loans and loans held for sale, which accounts for the majority of interest income, amounted to $20.9 million, an increase of $2.3 million, or 12%, over the comparable period, due primarily to loan growth.  The average loans and loans held for sale balances increased$181.0 million, or 11%, compared to the prior period. The average yield on loans and loans held for sale amounted to 4.56% for the three months endedMarch 31, 2016, an increase of 5 basis points since the same period in 2015.

Income on investment securities amounted to $1.5 million, an increase of $315 thousand, or 26%, compared to the same period in 2015. This increase primarily resulted from an increase in the average balance of investment securities by $61.0 million, or 26%. The average yield on investment securities also increased6 basis points.

Interest Expense

For the three months endedMarch 31, 2016, total interest expense amounted to $1.4 million, which was consistent with the prior period. 

Interest expense on interest checking, savings and money market accounts amounted to $605 thousand, an increase of $85 thousand, or 16%, compared to the comparable prior year period due primarily to an increase in average balances of $142.7 million, or 14%, to $1.18 billion from $1.04 billion.

Interest expense on borrowed funds amounted to $63 thousand, an increase of $42 thousand due to increases in both the average balances and the average rate. The average balance increased$22.3 million and the average rate increased20 basis points.

Interest expense on subordinated debt amounted to $231 thousand, a decrease of $141 thousand, or 38%, over the same period in 2015. The decrease resulted from a decrease in both the average rate and in the average balance. The average rate declined to 6.26% from 8.20% in the comparable period in 2015 as a result of the lower rate on the Notes issued in January 2015. The average balances decreased$3.3 million due to the timing of the issuance of the Notes versus the redemption in full of the Debt in March 2015.

For the three months endedMarch 31, 2016, the average balance of non-interest bearing demand deposits increased$96.8 million, or 20%, as compared to the same period in 2015.  Non-interest bearing demand deposits are an important component of the Company's core funding strategy.  This non-interest bearing funding represented 29% and 27% of total average deposit balances for the three months ended months ended March 31, 2016 and 2015, respectively.

Provision for Loan Loss

The provision for loan losses amounted to $850 thousand for the three months endedMarch 31, 2016, an increase of $225 thousand compared to the same period last year.  The increase in the provision for the three months endedMarch 31, 2016 was due primarily to additional reserves allocated to criticized and adversely classified commercial loans. In determining the provision to the allowance for loan losses, management takes into consideration the level of loan growth and an estimate of credit risk, which includes such items as adversely classified and non-performing loans, the estimated specific reserves needed for impaired loans, the level of net charge-offs, and the estimated impact of current economic conditions on credit quality. For further discussion regarding the provision for loan losses and management's assessment of the adequacy of the allowance for loan losses see "Credit Risk," "Asset Quality" and "Allowance for Loan Losses" under "Financial Condition" in this Item 2 above and "Credit Risk," "Asset Quality" and "Allowance for Loan Losses" in the Financial Condition section of Management's Discussion and Analysis of Financial Condition and Results of Operations in the Company's 2015 Annual Report on Form 10-K.

There have been no material changes to the Company's underwriting practices or to the allowance for loan loss methodology used to estimate loan loss exposure as reported in the Company's Annual Report on Form 10-K for the year ended December 31, 2015.  The provision for loan losses is a significant factor in the Company's operating results.

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Non-Interest Income

Non-interest income for the three months endedMarch 31, 2016 amounted to $3.2 million, a decrease of $819 thousand, or 20%, as compared to the three months endedMarch 31, 2015.  The significant changes are discussed below.

• Net gains on sales of investment securities decreased$898 thousand. Investment sales are typically driven by market opportunities.

• Other income increased$40 thousand, or 7%. Other income for the three months endedMarch 31, 2015 was impacted by the redemption of the Trust Preferred Securities, due primarily to a net loss ($192 thousand) on the Trust from the write-off of debt issuance costs, partially offset by gains on the sales of other real estate owned.

Non-Interest Expense

Non-interest expense for the three months endedMarch 31, 2016 amounted to $16.9 million, an increase of $659 thousand, or 4%, compared to the same period in 2015.  The significant changes are discussed below.

• Salaries and employee benefits increased by $904 thousand, or 9%, to support the Company's strategic growth and market expansion initiatives since the prior period.

• Occupancy and equipment expenses decreased$147 thousand, or 8%, due primarily to lower snow removal costs and utility expenses.

• Audit, legal and other professional expenses increased$129 thousand, or 36%, primarily due to increased audit costs for services in the current year.

• Other non-interest expense decreased$229 thousand, or 15%, due primarily to the prepayment fees ($285 thousand) associated with the redemption of the Trust Preferred Securities in the prior period as noted above.

Recent Accounting Pronouncements

In May 2014, the Financial Accounting Standards Board (“FASB”) issued Accounting Standards Update (“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 and results of operations.

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;

• 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.

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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 and results of operations.

In February 2016, the FASB issued ASU 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 and results of operations.

In March 2016, the FASB issued ASU No. 2016-09, "Compensation - Stock Compensation (Topic 718): Improvement to Employee Share-Based Payment Accounting." The amendments are intended to improve the accounting for employee share-based payments and affect all organizations that issue share-based payment awards to their employees. 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. Among the changes, the amendment allows for entities to partially settle awards in cash up to the maximum individual statutory tax rate in the applicable jurisdiction and still qualify for equity classification; all excess tax benefits and tax deficiencies (including tax benefits of dividends on share-based payment awards) will be recognized as income tax expense or benefit in the income statement; in addition, an entity can make an entity-wide accounting policy election to either estimate the number of awards that are expected to vest (current GAAP) or account for forfeitures when they occur; among other changes. The new standard is effective for fiscal years beginning after December 15, 2016, including interim periods within those fiscal years. The Company is currently evaluating the potential impact of the ASU on the Company's financial statements and results of operations.

For information regarding recently adopted accounting pronouncements by the Company, see Item (t) in Note 1, "Summary of Significant Accounting Policies," under the heading "Recently Adopted Accounting Pronouncements."

Item 3 - Quantitative and Qualitative Disclosures About Market Risk

The Company's primary market risk is interest rate risk.  Beginning in March 2016, oversight of interest rate risk management is the responsibility of Board of Directors. Prior to March 2016, the Asset Liability Committee of the Board of Directors oversaw the duties and responsibilities related to ALCO matters.  Annually, the Board reviews and approves the Company's asset-liability management policy, which provides management with guidelines for controlling interest rate risk, as measured through net interest income sensitivity to changes in interest rates, within certain tolerance levels.  The Board also establishes and monitors guidelines for the Company's liquidity and capital ratios.

The Company's asset-liability management strategies and guidelines are reviewed on a periodic basis by management and presented and discussed with the Board on at least a quarterly basis.  These strategies and guidelines are revised based on changes in interest rate levels, general economic conditions, competition in the marketplace, the current interest rate risk position of the Company, anticipated growth and other factors.

One of the principal factors in maintaining planned levels of net interest income is the ability to design effective strategies to manage the impact of interest rate changes on future net interest income.  Quarterly, management completes a net interest income sensitivity analysis, which is presented to the Board.  This analysis includes a simulation of the Company's net interest income under various interest rate scenarios.  Variations in the interest rate environment affect numerous factors, including prepayment speeds, reinvestment rates, maturities of investments (due to call provisions), and interest rates on various asset and liability accounts.

The Company can be subject to margin compression depending on the economic environment and the shape of the yield curve.  Under the Company's current balance sheet position, the Company's margin generally performs slightly better over time in a rising rate environment, while it generally decreases in a declining rate environment and when the yield curve is flattening or inverted.

Under a flattening yield curve scenario, margin compression occurs as the spread between the cost of funding and the yield on interest earning assets narrows.  Under this scenario the degree of margin compression is highly dependent on the Company's ability to fund asset growth through lower cost deposits.  However, if the curve is flattening, while short-term rates are rising,

56

the adverse impact on margin may be somewhat delayed, as increases in the Prime Rate will initially result in the Company's asset yields re-pricing more quickly than funding costs.

Under an inverted yield curve situation, shorter-term rates exceed longer-term rates, and the impact on margin is similar but more adverse than the flat curve scenario.  Again, however, the extent of the impact on margin is highly dependent on the Company's balance sheet mix.

In a declining rate environment, margin compression will eventually occur as the yield on interest earning assets decreases more rapidly than decreases in funding costs.  The primary causes would be the impact of interest rate decreases (including decreases in the Prime Rate) on adjustable rate loans and the fact that decreases in deposit rates may be limited or lag decreases in the Prime Rate. 

Net interest margin for the three months endedMarch 31, 2016 has increased compared to both the three months endedMarch 31, 2015 and December 31, 2015 primarily due to an increase in loan yields while maintaining a relatively flat cost of funds.  The increase in loan yields is primarily a result of the increase in the Prime rate in December 2015. Margin compression may occur if the yield curve continues to flatten while the cost of deposits remains at the same level.

There have been no material changes in the results of the Company's net interest income sensitivity analysis as reported in the Company's Annual Report on Form 10-K for the year ended December 31, 2015.  At March 31, 2016, management continues to consider the Company's primary interest rate risk exposure to be margin compression that may result from changes in interest rates and/or changes in the mix of the Company's balance sheet components.  This would include the mix of fixed versus variable rate loans and investments on the asset side, and higher cost versus lower cost deposits and overnight borrowings versus term borrowings and certificates of deposit on the liability side.

Item 4 - Controls and Procedures

Evaluation of Disclosure Controls and Procedures

The Company maintains a set of disclosure controls and procedures and internal controls designed to ensure that the information required to be disclosed in reports that it files or submits to the SEC under the Securities Exchange Act of 1934, as amended (the "Exchange Act"), is recorded, processed, summarized and reported within the time periods specified in the SEC's rules and forms.

The Company carried out an evaluation as of the end of the period covered by this report under the supervision and with the participation of the Company's management, including its principal executive officer and principal financial officer, of the effectiveness of the design and operation of the Company's disclosure controls and procedures pursuant to Exchange Act Rule 13a-15(b).  Based upon that evaluation, the Company's principal executive officer and principal financial officer concluded that the Company's disclosure controls and procedures are effective as of March 31, 2016.

Changes in Internal Control over Financial Reporting

There has been no change in the Company's internal control over financial reporting that has occurred during the Company's most recent fiscal quarter (i.e., the three months ended March 31, 2016) that has materially affected, or is reasonably likely to materially affect, the Company's internal control over financial reporting.

57

PART II - OTHER INFORMATION

Item 1 - Legal Proceedings

There are no material pending legal proceedings to which the Company or its subsidiaries are a party or to which any of its property is subject, other than ordinary routine litigation incidental to the business of the Company. Management does not believe resolution of any present litigation will have a material adverse effect on the consolidated financial condition or results of operations of the Company.

Item 1A - Risk Factors

Management believes that there have been no material changes in the Company's risk factors as reported in the Annual Report on Form 10-K for the year ended December 31, 2015.

Item 2 - Unregistered Sales of Equity Securities and Use of Proceeds

None.

Item 3 - Defaults upon Senior Securities

Not Applicable

Item 4 - Mine Safety Disclosures

Not Applicable

Item 5 - Other Information

Not Applicable

58

Item 6 - Exhibits

EXHIBIT INDEX

_____________

Exhibit No.Description

3.1 Amended and Restated Articles of Organization of the Company, incorporated by reference to the Company's Current Report on Form 8-K filed June 10, 2013.

3.2 Amended and Restated Bylaws of the Company, as amended as of January 15, 2013, incorporated by reference to Exhibit 3.2 to the Company's Current Report on Form 8-K filed on January 22, 2013.

4.1 Renewal Rights Agreement dated as of December 11, 2007 by and between the Company and Computershare Trust Company, N.A., as Rights Agent, including Terms of Series A Junior Participating Preferred Stock, Summary of Rights to Purchase Shares of Series A Junior Participating Preferred Stock, and Form of Rights Certificate attached as Exhibits A, B and C thereto, incorporated by reference to Exhibit 4.5 to the Company's Current Report on Form 8-K filed on December 13, 2007.

10.1 Enterprise Bank 2016 Variable Compensation Incentive Plan, incorporated by reference to Exhibit 10.1 to the Company’s Current Report on Form 8-K filed on March 18, 2016.

10.2 Enterprise Bancorp, Inc 2016 Stock Incentive Plan, incorporated by reference to the Company's definitive proxy statement on Schedule 14A filed on March 31, 2016.    

31.1* Certification of Principal Executive Officer under Securities Exchange Act Rule 13a-14(a)

31.2* Certification of Principal Financial Officer under Securities Exchange Act Rule 13a-14(a)

32* Certification of Principal Executive Officer and Principal Financial Officer under 18 U.S.C. § 1350 Furnished Pursuant to Securities Exchange Act Rule 13a-14(b)

101* The following materials from Enterprise Bancorp, Inc.’s Quarterly Report on Form 10-Q for the quarter ended March 31, 2016 were formatted in XBRL (eXtensible Business Reporting Language):

(i) Consolidated Balance Sheets as of March 31, 2016 and December 31, 2015;

(ii) Consolidated Statements of Income for the three months endedMarch 31, 2016 and 2015;

(iii) Consolidated Statements of Comprehensive Income for the three months endedMarch 31, 2016 and 2015;

(iv) Consolidated Statements of Changes in Equity for the three months endedMarch 31, 2016;

(v) Consolidated Statements of Cash Flows for the three months endedMarch 31, 2016 and 2015; and

(vi) Notes to Unaudited Consolidated Interim Financial Statements.

____________________

*Filed herewith

59

SIGNATURES

Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned thereunto duly authorized.

		ENTERPRISE BANCORP, INC.
DATE:	May 6, 2016	By:	/s/ James A. Marcotte
			James A. Marcotte
			Executive Vice President,
			Chief Financial Officer and Treasurer
			(Principal Financial Officer)

60

EX-31.1

EXHIBIT 31.1

CERTIFICATION OF PRINCIPAL EXECUTIVE OFFICER

UNDER SECURITIES EXCHANGE ACT RULE 13a-14(a)

I, John P. Clancy, Jr., certify that:

1.I have reviewed this quarterly report on Form 10-Q of Enterprise Bancorp, Inc.;

2.Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances under which such statements were made, not misleading with respect to the period covered by this report;

3.Based on my knowledge, the financial statements, and other financial information included in this report, fairly present in all material respects the financial condition, results of operations and cash flows of the registrant as of, and for, the periods presented in this report;

4.The registrant's other certifying officer and I are responsible for establishing and maintaining disclosure controls and procedures (as defined in Exchange Act Rules 13a-15(e) and 15d-15(e)) and internal control over financial reporting (as defined in Exchange Act Rules 13a-15(f) and 15d-15(f)) for the registrant and we have:

a)Designed such disclosure controls and procedures, or caused such disclosure controls and procedures to be designed under  our supervision, to ensure that material information relating to the registrant, including its consolidated subsidiaries, is made known to us by others within those entities, particularly during the period in which this report is being prepared;

b)Designed such internal control over financial reporting, or caused such internal control over financial reporting to be designed under our supervision, to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with generally accepted accounting principles;

c)Evaluated the effectiveness of the registrant's disclosure controls and procedures and presented in this report our conclusions about the effectiveness of the disclosure controls and procedures, as of the end of the period covered by this report based on such evaluation; and

d)Disclosed in this report any change in the registrant's internal control over financial reporting that occurred during the registrant's most recent fiscal quarter (the registrant's fourth fiscal quarter in the case of an annual report) that has materially affected, or is reasonably likely to materially affect, the registrant's internal control over financial reporting; and

5.The registrant's other certifying officer and I have disclosed, based on our most recent evaluation of internal control over financial reporting, to the registrant's auditors and the audit committee of the registrant's board of directors (or persons performing the equivalent functions):

a)All significant deficiencies and material weaknesses in the design or operation of internal control over financial reporting which are reasonably likely to adversely affect the registrant's ability to record, process, summarize and report financial information; and

b)Any fraud, whether or not material, that involves management or other employees who have a significant role in the registrant's internal control over financial reporting.

Date:	May 6, 2016	/s/ John P. Clancy, Jr.
		John P. Clancy, Jr.
		Chief Executive Officer (Principal Executive Officer)

EX-31.2

EXHIBIT 31.2

CERTIFICATION OF PRINCIPAL FINANCIAL OFFICER

UNDER SECURITIES EXCHANGE ACT RULE 13a-14(a)

I, James A. Marcotte, Jr., certify that:

1.I have reviewed this quarterly report on Form 10-Q of Enterprise Bancorp, Inc.;

2.Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances under which such statements were made, not misleading with respect to the period covered by this report;

3.Based on my knowledge, the financial statements, and other financial information included in this report, fairly present in all material respects the financial condition, results of operations and cash flows of the registrant as of, and for, the periods presented in this report;

4.The registrant's other certifying officer and I are responsible for establishing and maintaining disclosure controls and procedures (as defined in Exchange Act Rules 13a-15(e) and 15d-15(e)) and internal control over financial reporting (as defined in Exchange Act Rules 13a-15(f) and 15d-15(f)) for the registrant and we have:

a)Designed such disclosure controls and procedures, or caused such disclosure controls and procedures to be designed under  our supervision, to ensure that material information relating to the registrant, including its consolidated subsidiaries, is made known to us by others within those entities, particularly during the period in which this report is being prepared;

b)Designed such internal control over financial reporting, or caused such internal control over financial reporting to be designed under our supervision, to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with generally accepted accounting principles;

c)Evaluated the effectiveness of the registrant's disclosure controls and procedures and presented in this report our conclusions about the effectiveness of the disclosure controls and procedures, as of the end of the period covered by this report based on such evaluation; and

d)Disclosed in this report any change in the registrant's internal control over financial reporting that occurred during the registrant's most recent fiscal quarter (the registrant's fourth fiscal quarter in the case of an annual report) that has materially affected, or is reasonably likely to materially affect, the registrant's internal control over financial reporting; and

5.The registrant's other certifying officer and I have disclosed, based on our most recent evaluation of internal control over financial reporting, to the registrant's auditors and the audit committee of the registrant's board of directors (or persons performing the equivalent functions):

a)All significant deficiencies and material weaknesses in the design or operation of internal control over financial reporting which are reasonably likely to adversely affect the registrant's ability to record, process, summarize and report financial information; and

b)Any fraud, whether or not material, that involves management or other employees who have a significant role in the registrant's internal control over financial reporting.

Date:	May 6, 2016	/s/ James A. Marcotte
		James A. Marcotte
		Executive Vice President, Chief Financial Officer and Treasurer, (Principal Financial Officer)

EX-32

EXHIBIT 32

CERTIFICATION OF PRINCIPAL EXECUTIVE OFFICER AND PRINCIPAL FINANCIAL OFFICER

UNDER 18 U.S.C. § 1350 FURNISHED PURSUANT TO SECURITIES EXCHANGE ACT RULE 13a-14(b)

In connection with the Quarterly Report of Enterprise Bancorp, Inc. (the “Company”) on Form 10-Q for the period ended on March 31, 2016, as filed with the Securities and Exchange Commission on the date hereof (the “Report”), each of the undersigned, in his respective capacities indicated below, hereby certifies, pursuant to 18 U.S.C. § 1350, as enacted by Section 906 of the Sarbanes-Oxley Act of 2002, that, to his knowledge and belief, (1) the Report fully complies with the requirements of Section 13(a) or 15(d) of the Securities Exchange Act of 1934, as amended, and (2) the information contained in the Report fairly presents, in all material respects, the financial condition and results of operations of the Company.

Date: May 6, 2016

/s/ John P. Clancy, Jr.

John P. Clancy, Jr.

Chief Executive Officer (Principal Executive Officer)

/s/ James A. Marcotte

James A. Marcotte

Executive Vice President, Chief Financial Officer and Treasurer (Principal Financial Officer)

A signed original of this written statement required by Section 906 has been provided to Enterprise Bancorp, Inc. and will be retained by Enterprise Bancorp, Inc. and furnished to the Securities and Exchange Commission or its staff upon request.

XML

Document and Entity Information - shares	3 Months Ended
	Mar. 31, 2016	May. 02, 2016
Document and Entity Information [Abstract]
Entity Registrant Name	ENTERPRISE BANCORP INC /MA/
Entity Central Index Key	0001018399
Current Fiscal Year End Date	--12-31
Entity Filer Category	Accelerated Filer
Document Type	10-Q
Document Period End Date	Mar. 31, 2016
Document Fiscal Year Focus	2016
Document Fiscal Period Focus	Q1
Amendment Flag	false
Entity Common Stock, Shares Outstanding		10,474,757

XML

Consolidated Balance Sheets - USD ($) $ in Thousands	Mar. 31, 2016	Dec. 31, 2015
Cash and cash equivalents:
Cash and due from banks	$ 34,018	$ 32,318
Interest-earning deposits	24,912	19,177
Total cash and cash equivalents	58,930	51,495
Investment securities at fair value	304,946	300,358
Federal Home Loan Bank stock	2,793	3,050
Loans held for sale	770	1,709
Loans, less allowance for loan losses of $29,910 at March 31, 2016 and $29,008 at December 31, 2015	1,834,782	1,830,954
Premises and equipment, net	31,984	30,553
Accrued interest receivable	8,393	7,790
Deferred income taxes, net	12,962	14,111
Bank-owned life insurance	28,209	28,018
Prepaid income taxes	0	57
Prepaid expenses and other assets	15,207	11,780
Goodwill	5,656	5,656
Total assets	2,304,632	2,285,531
Liabilities
Deposits	2,087,737	2,018,148
Borrowed Funds	671	53,671
Subordinated debt	14,825	14,822
Accrued expenses and other liabilities	13,497	18,287
Income taxes payable	1,551	0
Accrued interest payable	266	276
Total liabilities	$ 2,118,547	$ 2,105,204
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; 20,000,000 shares authorized; 10,473,738 shares issued and outstanding at March 31, 2016 (including 155,421 shares of unvested participating restricted awards), 10,377,787 shares issued and outstanding at December 31, 2015 (including 144,717 shares of unvested participating restricted awards)	105	104
Additional paid-in-capital	61,927	61,008
Retained earnings	119,904	116,941
Accumulated other comprehensive income	4,149	2,274
Total stockholders' equity	186,085	180,327
Total liabilities and stockholders' equity	$ 2,304,632	$ 2,285,531

XML

Consolidated Balance Sheets (Parenthetical) - USD ($) $ in Thousands	Mar. 31, 2016	Dec. 31, 2015
Statement of Financial Position [Abstract]
Allowance for loan losses	$ 29,910	$ 29,008
Common stock, par value	$ 0.01	$ 0.01
Common stock, shares authorized	20,000,000	20,000,000
Common stock, shares issued	10,473,738	10,377,787
Common stock, shares outstanding	10,473,738	10,377,787
Preferred stock, par value	$ 0.01	$ 0.01
Preferred stock, shares authorized	1,000,000	1,000,000
Preferred stock, shares issued	0	0
Unvested participating restricted stock awards	155,421	144,717

XML

Consolidated Statements of Income - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015
Interest and dividend income:
Loans and loans held for sale	$ 20,881	$ 18,582
Investment securities	1,540	1,225
Other interest-earning assets	44	32
Total interest and dividend income	22,465	19,839
Interest expense:
Deposits	1,088	992
Borrowed funds	63	21
Subordinated debt	231	372
Total interest expense	1,382	1,385
Net interest income	21,083	18,454
Provision for loan losses	850	625
Net interest income after provision for loan losses	20,233	17,829
Non-interest income:
Investment advisory fees	1,104	1,177
Deposit and interchange fees	1,242	1,154
Income on bank-owned life insurance,net	191	100
Net gains on sales of investment securities	2	900
Gains on sales of loans	89	156
Other income	578	538
Total non-interest income	3,206	4,025
Non-interest expense:
Salaries and employee benefits	10,485	9,581
Occupancy and equipment expenses	1,813	1,960
Technology and telecommunications expenses	1,423	1,417
Advertising and public relations expenses	679	730
Audit, legal and other professional fees	488	359
Deposit insurance premiums	326	293
Supplies and postage expenses	229	258
Investment advisory and custodial expenses	89	46
Other operating expenses	1,337	1,566
Total non-interest expense	16,869	16,210
Income before income taxes	6,570	5,644
Provision for income taxes	2,257	2,024
Net income	$ 4,313	$ 3,620
Basic earnings per share	$ 0.41	$ 0.35
Diluted earnings per share	$ 0.41	$ 0.35
Basic weighted average common shares outstanding	10,405,112	10,243,044
Diluted weighted average common shares outstanding	10,471,784	10,310,474

XML

Consolidated Statements of Comprehensive Income - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015
Statement of Comprehensive Income [Abstract]
Net income	$ 4,313	$ 3,620
Other comprehensive income, net of taxes:
Gross change in unrealized holding gains on investments arising during the period	3,026	2,107
Income tax expense	(1,150)	(724)
Net unrealized holding gains, net of tax	1,876	1,383
Less: Reclassification adjustment for net gains included in net income
Net realized gains on sales of securities during the period	2	900
Income tax expense	(1)	(314)
Reclassification adjustment for gains realized, net of tax	1	586
Total other comprehensive income	1,875	797
Comprehensive income	$ 6,188	$ 4,417

XML

Consolidated Statement of Changes in Stockholders' Equity - 3 months ended Mar. 31, 2016 - USD ($) $ in Thousands	Total	Common Stock	Additional Paid-in Capital	Retained Earnings	Accumulated Other Comprehensive Income
Balance, beginning at Dec. 31, 2015	$ 180,327	$ 104	$ 61,008	$ 116,941	$ 2,274
Increase (Decrease) in Stockholders' Equity
Net income	4,313			4,313
Other comprehensive income, net	1,875				1,875
Common stock dividend paid ($0.13 per share)	(1,350)			(1,350)
Common stock issued under dividend reinvestment plan	336	0	336
Common stock issued other	16	0	16
Stock-based compensation, net	423	1	422
Stock options exercised, net	145	0	145
Balance, ending at Mar. 31, 2016	$ 186,085	$ 105	$ 61,927	$ 119,904	$ 4,149

XML

Consolidated Statement of Changes in Stockholders' Equity (Parenthetical)	3 Months Ended
	Mar. 31, 2016 $ / shares
Statement of Stockholders' Equity [Abstract]
Common stock dividend paid, per share	$ 0.13

XML

Consolidated Statements of Cash Flows - USD ($)	3 Months Ended		12 Months Ended
	Mar. 31, 2016	Mar. 31, 2015	Dec. 31, 2015
Cash flows from operating activities
Net income	$ 4,313,000	$ 3,620,000
Adjustments to reconcile net income to net cash (used in) provided by operating activities:
Provision for loan losses	850,000	625,000
Depreciation and amortization	1,425,000	1,389,000
Stock-based compensation expense	443,000	488,000
Mortgage loans originated for sale	(3,273,000)	(6,729,000)
Proceeds from mortgage loans sold	4,301,000	8,131,000
Net gains on sales of loans	(89,000)	(156,000)
Net gains on sales of OREO	0	(154,000)
Net gains on sales of investments	(2,000)	(900,000)
Income on bank-owned life insurance,net	(191,000)	(100,000)
Changes in:
Accrued interest receivable	(603,000)	(268,000)
Prepaid expenses and other assets	(3,580,000)	6,807,000
Deferred income taxes	0	74,000
Accrued expenses and other liabilities	(662,000)	(228,000)
Subordinated debt issuance costs	3,000	(190,000)
Accrued interest payable	(10,000)	(282,000)
Net cash provided by operating activities	2,925,000	12,127,000
Cash flows from investing activities:
Proceeds from sales of investment securities available for sale	306,000	10,151,000
Net proceeds (purchases) from FHLB capital stock	257,000	(882,000)
Proceeds from maturities, calls and pay-downs of investment securities	4,785,000	6,443,000
Purchase of investment securities	(9,210,000)	(9,877,000)
Net increase in loans	(4,678,000)	(9,459,000)
Additions to premises and equipment, net	(3,006,000)	(786,000)
Proceeds from OREO sales and payments	0	901,000
Proceeds from bank-owned life insurance	405,000	0
Net cash used in investing activities	(11,141,000)	(3,509,000)
Cash flows from financing activities:
Net increase in deposits	69,589,000	96,748,000
Net decrease in borrowed funds	(53,000,000)	(58,000,000)
Repayment of subordinated debt	0	(10,825,000)
Proceeds from issuance of subordinated debt	0	15,000,000
Cash dividends paid	(1,350,000)	(1,279,000)
Proceeds from issuance of common stock	352,000	368,000
Exercise of stock options, net of repurchases for tax withholdings and tax benefit on stock options and restricted stock	60,000	384,000
Net cash provided by financing activities	15,651,000	42,396,000
Net increase in cash and cash equivalents	7,435,000	51,014,000
Cash and cash equivalents at beginning of period	51,495,000	40,146,000	$ 40,146,000
Cash and cash equivalents at end of period	58,930,000	91,160,000	$ 51,495,000
Supplemental financial data:
Cash Paid For: Interest	1,392,000	1,667,000
Cash Paid For: Income Taxes	636,000	587,000
Supplemental schedule of non-cash investing activity:
Net purchases of investment securities not yet settled	$ 100,000	$ 2,237,000

XML

Summary of Significant Accounting Policies

3 Months Ended

Mar. 31, 2016

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, 2015 audited consolidated financial statements and notes thereto contained in the 2015 Annual Report on Form 10-K of Enterprise Bancorp, Inc. (the "Company" or "Enterprise"), a Massachusetts corporation, as filed with the Securities and Exchange Commission (the "SEC") on March 15, 2016.  The Company has not changed its accounting policies from those disclosed in its 2015 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.

The Company has 22 full service branches serving the greater Merrimack Valley and North Central regions of Massachusetts and Southern New Hampshire. The Company also plans to open its second Nashua, NH branch in the second quarter of 2016. Through the Bank and its subsidiaries, the Company offers a range of commercial and consumer loan products, and deposit and cash management services. The Company also offers 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.

Prior to the end of March 2015, pursuant to the Accounting Standards Codification ("ASC") Topic 810 "Consolidation of Variable Interest Entities," issued by the Financial Accounting Standards Board ("FASB"), the Company carried Junior Subordinated Debentures as a liability on its consolidated financial statements, along with the related interest expense. The debentures were issued by a statutory business trust (the "Trust") created by the Company in March 2000 under the laws of the State of Delaware, and the trust preferred securities issued by the Trust, and the related non-interest expense, were excluded from the Company's consolidated financial statements. In March 2015, the Company redeemed in full the Junior Subordinated Debentures, which in turn allowed the Trust to redeem in full the trust preferred securities. The Company also dissolved the Trust in April 2015. See Note 6, "Borrowed Funds and Subordinated Debt," below for further information on the Company's subordinated debt.

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 accounting principles generally accepted in the United States ("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.

(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 2015 Annual Report on Form 10-K, the three most significant areas in which management applies critical assumptions and estimates that are particularly susceptible to change relate to the determination 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 2015 Annual Report on Form 10-K for significant accounting policies. The Company has not changed its significant accounting policies from those disclosed in its 2015 Annual Report filed on Form 10-K.

(c) Reporting 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 Accounting Standards Update ("ASU") No. 2013-02, Comprehensive Income (Topic 220): Reporting Amounts Reclassified Out of Accumulated Other Comprehensive Income, 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."

(d) Restricted Investments

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 the Company's borrowing relationship from the FHLB.  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.

In conjunction with the other-than-temporary-impairment ("OTTI") review on available-for-sale investments (See Note 2, "Investments," for additional information), management also regularly reviews its holdings of FHLB stock for 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.

(e) 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 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 March 31, 2016.  The Company is subject to U.S. federal and state income tax examinations by taxing authorities for the 2012 through 2015 tax years.

(f) Subsequent Events

Although the Company believes its current capital is adequate to support ongoing operations, on April 21, 2016, the Company commenced a subscription rights offering to the Company’s stockholders, together with a supplemental community offering, with the intention of raising up to $10 million in gross proceeds. The Company has the ability to accept oversubscription requests in the rights offering and/or to facilitate sales of shares to new investors in the community offering resulting in gross proceeds of up to $12 million. All shares sold in the offerings will be sold at a per share price of $21.50. Subject to early termination or extension at the sole discretion of the Company, the rights offering is scheduled to expire on May 27, 2016 and the supplemental community offering is scheduled to expire on June 10, 2016. The Company intends to use the net proceeds from the offerings to support future asset growth and for various corporate purposes. The Company is using its existing shelf registration statement in connection with the offerings.

(g) Recent Accounting Pronouncements

In April 2015, the Financial Accounting Standards Board ("FASB") issued ASU No. 2015-03, Imputation of Interest (Subtopic 835-30): Simplifying the Presentation of Debt Issuance Costs. The amendments in this ASU require that debt issuance costs related to a recognized debt liability be presented in the balance sheet as a direct deduction from the carrying amount of that debt liability, consistent with debt discounts. The recognition and measurement guidance for debt issuance costs are not affected by the amendments in this ASU. Entities are required to apply the new guidance on a retrospective basis, wherein the balance sheet of each individual period presented should be adjusted to reflect the period-specific effects of applying the new guidance. For public business entities, the amendments are effective for financial statements issued for fiscal years beginning after December 15, 2015, and interim periods within those fiscal years. Early adoption of the amendments is permitted for financial statements that have not been previously issued. The Company early adopted this ASU as of January 1, 2015 in relation to the Company's Fixed-to-Floating Rate Subordinated Notes issued in January 2015. This adoption did not have a material impact on the Company's financial statements or results of operations.

In January 2015, the FASB issued Accounting Standards Update (ASU) 2015-01, "Income Statement-Extraordinary and Unusual Items (Subtopic 225-20): Simplifying Income Statement Presentation by Eliminating the Concept of Extraordinary Items." This ASU will align more closely GAAP income statement presentation guidance with International Audit Standards (IAS) 1, Presentation of Financial Statements, which prohibits the presentation and disclosure of extraordinary items. The amendments in this update are effective for fiscal years, and interim periods within those fiscal years, beginning after December 15, 2015. The adoption of this standard did not have an impact on the Company's financial statements. 

For information regarding recent accounting pronouncements not yet adopted by the Company, see Item 2, "Management's Discussion and Analysis of Financial Condition and Results of Operations," under the heading "Recent Accounting Pronouncements Not Yet Adopted."

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Investments

3 Months Ended

Mar. 31, 2016

Investments, Debt and Equity Securities [Abstract]

Investments

Investments

The amortized cost and carrying values of investment securities at the dates specified are summarized as follows:

	March 31, 2016
(Dollars in thousands)	Amortized cost		Unrealized gains		Unrealized losses		Fair Value
Federal agency obligations (1)	$	78,640	$	1,097	$	19	$	79,718
Residential federal agency MBS (1)	72,069		844		184		72,729
Commercial federal agency MBS(1)	27,499		286		—		27,785
Municipal securities	97,040		2,928		43		99,925
Corporate bonds	10,284		128		29		10,383
Certificates of deposits (2)	1,943		17		—		1,960
Total fixed income securities	287,475		5,300		275		292,500
Equity investments	10,969		1,879		402		12,446
Total available-for-sale securities, at fair value	$	298,444	$	7,179	$	677	$	304,946

	December 31, 2015
(Dollars in thousands)	Amortized cost		Unrealized gains		Unrealized losses		Fair Value
Federal agency obligations(1)	$	78,626	$	352	$	153	$	78,825
Residential federal agency MBS(1)	75,105		406		648		74,863
Commercial federal agency MBS(1)	23,908		—		363		23,545
Municipal securities	96,189		2,357		35		98,511
Corporate bonds	10,257		44		95		10,206
Certificates of deposits(2)	2,753		—		2		2,751
Total fixed income securities	286,838		3,159		1,296		288,701
Equity investments	10,043		1,966		352		11,657
Total available-for-sale securities, at fair value	$	296,881	$	5,125	$	1,648	$	300,358

__________________________________________

(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 federal agency MBS category were collateralized mortgage obligations (“CMOs”) totaling $20.0 million and $20.8 million at March 31, 2016 and December 31, 2015 respectively. All of the commercial MBS investments held by the Company were CMOs.

At March 31, 2016, the equity portfolio consisted primarily of investments in a diversified group of mutual funds, with a portion of the portfolio (approximately 16%) invested in individual common stock of entities in the financial services industry.

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.

The net unrealized gain or loss in the Company's fixed income portfolio fluctuates as market interest rates rise and fall.  Due to the 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 fixed income investments will also decline as the securities approach maturity, or if the issuer is credit impaired. Unrealized gains or losses will be recognized in the statements of income if the securities are sold. However, if an unrealized loss on a fixed income investment 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.

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.

Management regularly reviews the portfolio for securities with unrealized losses that are other-than-temporarily impaired.  During the three months endedMarch 31, 2016 and 2015, the Company did not record any fair value impairment charges on its investments. As of March 31, 2016, there were a total of 36 investments (fixed income and equity, excluding CDs), with a fair market value of $28.6 million, in an unrealized loss position totaling $677 thousand, including 9 investments in an unrealized loss position totaling $194 thousand that have been temporarily impaired for 12 months or longer. Management attributes these unrealized losses to increases in market yields compared to the yields at the time the investments were purchased by the Company and the impact of market value fluctuations on the equity portion of our portfolio. Management does not consider these investments to be other-than-temporarily impaired at March 31, 2016, because (1) the decline in market value is not attributable to credit quality for fixed income securities or a fundamental deterioration in the equity fund or issuers, and (2) the Company does not intend to, 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.  

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 fixed income investments 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 March 31, 2016, 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.

As noted in the table above, a small portion of the fixed income portfolio is also invested in short-term CDs purchased on the open market; none of which were in an unrealized loss position at March 31, 2016.

The contractual maturity distribution at March 31, 2016 of total fixed income investments was as follows:

	Within One Year				After One, But Within  Five Years				After Five, But Within Ten Years				After Ten Years
	Amortized Cost		Yields		Amortized Cost		Yields		Amortized Cost		Yields		Amortized Cost		Yields
At amortized cost:
Federal agency obligations	$	7,035	0.91	%	$	62,054	1.59	%	$	9,551	2.22	%	$	—	—	%
Residential federal agency MBS	—		—	%	3,101		3.17	%	1,242		1.91	%	67,726		2.13	%
Commercial federal agency MBS	—		—	%	—		—	%	27,499		2.26	%	—		—	%
Municipal securities	6,233		2.31	%	25,813		3.58	%	33,612		3.65	%	31,382		3.85	%
Corporate bonds	528		1.33	%	5,175		2.15	%	4,581		2.94	%	—		—	%
CDs	993		0.34	%	950		2.13	%	—		—	%	—		—	%
Total fixed income securities	$	14,789	1.48	%	$	97,093	2.21	%	$	76,485	2.90	%	$	99,108	2.67	%
At fair value:
Total fixed income securities	$	14,841			$	98,726			$	78,292			$	100,641

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 carrying value of fixed income investments above are callable securities, comprised of municipal securities and corporate bonds totaling $49.4 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 deposit 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 $290.5 million at March 31, 2016. 

See Note 11, "Fair Value Measurements," below for further information regarding the Company's fair value measurements for available-for-sale securities.

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Loans

3 Months Ended

Mar. 31, 2016

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 loan 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)	March 31, 2016			December 31, 2015
Commercial real estate	$	936,907		$	936,921
Commercial and industrial	456,436			458,553
Commercial construction	207,214			202,993
Total commercial loans	1,600,557			1,598,467
Residential mortgages	170,585			169,188
Home equity loans and lines	84,665			83,373
Consumer	10,539			10,747
Total retail loans	265,789			263,308
Gross loans	1,866,346			1,861,775
Deferred loan origination fees, net	(1,654		)	(1,813		)
Total loans	1,864,692			1,859,962
Allowance for loan losses	(29,910		)	(29,008		)
Net loans	$	1,834,782		$	1,830,954

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 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 commercial 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.  The balances participated out to other institutions are not carried as assets on the Company's financial statements.  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.  The Company performs an independent credit analysis of each commitment and a review of the participating institution prior to participation in the loan.  Loans originated by other banks in which the Company is a participating institution amounted to $59.6 million at March 31, 2016 and $62.3 million at December 31, 2015.

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 be 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 assessed 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 also be fixed for three to fifteen years.

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 appraised value of the property securing the loan.  Home equity lines generally have interest rates that adjust monthly based on changes in the 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 March 31, 2016 and December 31, 2015, the Company was servicing residential mortgage loans owned by investors amounting to $18.2 million and $18.5 million, respectively.  Additionally, the Company was servicing commercial loans participated out to various other institutions amounting to $53.1 million and $52.7 million at March 31, 2016 and December 31, 2015, respectively. See the discussion above for further information regarding commercial participations.

Loans serving as collateral

Loans designated as qualified collateral and pledged to the FHLB for borrowing capacity are summarized below:

(Dollars in thousands)	March 31, 2016		December 31, 2015
Commercial real estate	$	277,056	$	281,802
Residential mortgages	122,744		118,855
Home equity	13,349		13,972
Total loans pledged to FHLB	$	413,149	$	414,629

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Allowance For Loan Loss

3 Months Ended

Mar. 31, 2016

Receivables [Abstract]

Allowance for Loan Loss

Allowance for Loan Losses

While the Company seeks to manage its loan portfolio to avoid concentration by industry and loan size to lessen its credit risk exposure, inherent in the lending process is the risk of loss due to customer non-payment, or "credit risk."  The Company endeavors to minimize this risk through sound underwriting practices and the risk management function; however, management recognizes that loan losses will occur and that the amount of these losses will fluctuate depending on the risk characteristics of the loan portfolio and economic conditions.

The allowance for loan losses is an estimate of probable credit risk inherent in the loan portfolio as of the specified balance sheet dates. The Company maintains the allowance at a level that it deems adequate to absorb all reasonably anticipated probable losses from specifically known and other credit risks associated with the portfolio. In making its assessment on the adequacy of the allowance, management considers several quantitative and qualitative factors that could have an effect on the credit quality of the portfolio, including individual assessment of larger and high risk credits, delinquency trends and the level of non-performing loans, impaired and restructured loans, net charge-offs, the growth and composition of the loan portfolio, expansion in the geographic market area, the experience level of lenders and changes in underwriting criteria, and the strength of the local and national economies, among other factors.

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 2015 Annual Report on Form 10-K.  Refer to heading "Allowance for probable loan losses methodology" contained in Note 4 "Allowance For Loan Losses," to the Company's consolidated financial statements contained in the 2015 Annual Report on Form 10-K for further discussion of management's methodology used to estimate the loan loss exposure inherent in the portfolio for purposes of establishing a sufficient allowance.

The balances of loans as of March 31, 2016 by segment and evaluation method are summarized as follows: 

(Dollars in thousands)	Loans individually evaluated for impairment		Loans collectively evaluated for impairment			Total Loans
Commercial real estate	$	9,926	$	926,981		$	936,907
Commercial and industrial	7,853		448,583			456,436
Commercial construction	2,989		204,225			207,214
Residential	307		170,278			170,585
Home equity	309		84,356			84,665
Consumer	21		10,518			10,539
Deferred Fees	—		(1,654		)	(1,654		)
Total loans	$	21,405	$	1,843,287		$	1,864,692

The balances of loans as of December 31, 2015 by segment and evaluation method are summarized as follows:

(Dollars in thousands)	Loans individually evaluated for impairment		Loans collectively evaluated for impairment			Total Loans
Commercial real estate	$	12,287	$	924,634		$	936,921
Commercial and industrial	7,810		450,743			458,553
Commercial construction	3,032		199,961			202,993
Residential	366		168,822			169,188
Home equity	169		83,204			83,373
Consumer	24		10,723			10,747
Deferred Fees	—		(1,813		)	(1,813		)
Total loans	$	23,688	$	1,836,274		$	1,859,962

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, adversely classified loans, 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. However, despite prudent loan underwriting and ongoing credit risk management, adverse changes within the Company's market area or deterioration in the local, regional or national economic conditions could negatively impact the portfolio's credit risk profile and the Company's asset quality in the future.

Adversely classified loans

The Company's loan risk rating system classifies loans depending on risk of loss characteristics.  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.

Loans classified as substandard include those loans characterized by the distinct possibility that the Company will sustain some loss if deficiencies are not corrected.  These loans are inadequately protected by the sound net worth and paying capacity of the borrower; repayment has become increasingly reliant on collateral liquidation or reliance on guarantees; credit weaknesses are well-defined; and borrower cash flow is insufficient to meet required debt service specified in loan terms and to meet other obligations, such as trade debt and tax payments.

Loans classified as doubtful have all the weaknesses inherent in a substandard rated loan with the added characteristic that the weaknesses make collection or full payment from liquidation, on the basis of currently existing facts, conditions, and values, highly questionable and improbable.  The probability of loss is extremely high, but because of certain important and reasonably specific pending factors which may work to the advantage and strengthening of the loan, its classification as an estimated loss is deferred until more exact status may be determined.

Loans classified as loss are generally considered uncollectible at present, although long-term recovery of part or all of loan proceeds may be possible.  These "loss" loans would require a specific loss reserve or charge-off.

Adversely classified loans may be accruing or in non-accrual status and may be additionally designated as impaired or restructured, or some combination thereof.  Loans which are evaluated to be of weaker credit quality are reviewed on a more frequent basis by management.

The following tables present the Company's credit risk profile for each class of loan in its portfolio by internally assigned risk rating category at the periods indicated. 

	March 31, 2016
	Adversely Classified						Not Adversely
(Dollars in thousands)	Substandard		Doubtful		Loss		Classified		Gross Loans
Commercial real estate	$	11,586	$	—	$	—	$	925,321	$	936,907
Commercial and industrial	9,100		42		3		447,291		456,436
Commercial construction	1,734		—		—		205,480		207,214
Residential	1,213		—		—		169,372		170,585
Home equity	644		—		—		84,021		84,665
Consumer	37		11		—		10,491		10,539
Total gross loans	$	24,314	$	53	$	3	$	1,841,976	$	1,866,346

	December 31, 2015
	Adversely Classified						Not Adversely
(Dollars in thousands)	Substandard		Doubtful		Loss		Classified		Gross Loans
Commercial real estate	$	12,487	$	—	$	—	$	924,434	$	936,921
Commercial and industrial	8,670		—		3		449,880		458,553
Commercial construction	1,776		—		—		201,217		202,993
Residential	1,278		—		—		167,910		169,188
Home equity	503		—		5		82,865		83,373
Consumer	38		11		—		10,698		10,747
Total gross loans	$	24,752	$	11	$	8	$	1,837,004	$	1,861,775

Total adversely classified loans amounted to 1.31% of total loans at March 31, 2016, as compared to 1.33% at December 31, 2015. At March 31, 2016, as compared to December 31, 2015, adversely classified balances decreased, due primarily to several larger commercial loan payoffs and principal payments, partially offset by additional credit downgrades during the period.

Past due and non-accrual loans

Loans on which the accrual of interest has been discontinued are designated as non-accrual and are credit downgraded to one of the adversely classified categories noted above.  Accrual of interest on loans is generally discontinued when a loan becomes contractually past due, with respect to interest or principal, by 90 days, or when reasonable doubt exists as to the full and timely collection of interest or principal. When a loan is placed on non-accrual status, all interest previously accrued but not collected is reversed against current period interest income. Interest payments received on loans in a non-accrual status are generally applied to principal on the books of the Company. Interest accruals are resumed on such loans only when payments are brought current and have remained current for a period of 180 days and when, in the judgment of management, the collectability of both principal and interest is reasonably assured. Additionally, deposit accounts overdrawn for 90 or more days are included in the consumer non-accrual balances below.

 The following tables present age analysis of past due loans as of the dates indicated. 

Balance at March 31, 2016
(Dollars in thousands)	Loans 30-59 Days Past Due		Loans 60-89 Days Past Due		Loans 90 or More Days Past Due (non- accrual)		Total Past Due Loans		Current Loans		Gross Loans
Commercial real estate	$	4,665	$	398	$	6,188	$	11,251	$	925,656	$	936,907
Commercial and industrial	833		238		4,106		5,177		451,259		456,436
Commercial construction	175		—		213		388		206,826		207,214
Residential	—		553		307		860		169,725		170,585
Home equity	—		—		424		424		84,241		84,665
Consumer	7		19		26		52		10,487		10,539
Total gross loans	$	5,680	$	1,208	$	11,264	$	18,152	$	1,848,194	$	1,866,346

Balance at December 31, 2015
(Dollars in thousands)	Loans 30-59 Days Past Due		Loans 60-89 Days Past Due		Loans 90 or More Days Past Due (non- accrual)		Total Past Due Loans		Current Loans		Gross Loans
Commercial real estate	$	1,124	$	1,140	$	8,506	$	10,770	$	926,151	$	936,921
Commercial and industrial	1,218		691		4,323		6,232		452,321		458,553
Commercial construction	581		—		335		916		202,077		202,993
Residential	250		180		366		796		168,392		169,188
Home equity	622		—		288		910		82,463		83,373
Consumer	35		10		27		72		10,675		10,747
Total gross loans	$	3,830	$	2,021	$	13,845	$	19,696	$	1,842,079	$	1,861,775

At March 31, 2016 and March 31, 2015, all loans 90 days or more past due were carried as non-accrual. Non-accrual loans which were not adversely classified amounted to $337 thousand at March 31, 2016 and $402 thousand at December 31, 2015. 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 0.60% at March 31, 2016, 0.74% at December 31, 2015, and 1.07% at March 31, 2015. Non-accrual loan balances decreased due primarily to several larger commercial loan payoffs and principal payments, partially offset by additional loans added to non-accrual status during the period. The increase in loans 30 - 59 days past due occurred within the commercial real estate portfolio at March 31, 2016, with the majority of these loans having subsequent payments made by mid-April.

The Company's obligation to fulfill the additional funding commitments on non-accrual 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. At March 31, 2016, there were no additional funding commitments for loans on non-accrual status.

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.  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 (or "TDR," see below).  Impaired loans exclude large groups of smaller-balance homogeneous loans, such as residential mortgage loans and consumer loans, which are collectively evaluated for impairment, and loans that are measured at fair value, unless the loan is amended in a TDR. 

Management does not set any minimum delay of payments as a factor in reviewing for impaired classification.  Management considers the individual payment status, net worth and earnings potential of the borrower, and the value and cash flow of the collateral as factors to determine if a loan will be paid in accordance with its contractual terms. An impaired or TDR loan classification will be considered for upgrade based on the borrower's sustained performance over time and their improving financial condition. Consistent with the criteria for returning non-accrual loans to accrual status, the borrower must demonstrate the ability to continue to service the loan in accordance with the original or modified terms and, in the judgment of management, the collectability of the remaining balances, both principal and interest, are reasonably assured. In the case of TDR loans having had a modified interest rate, that rate must be at, or greater than, a market rate for a similar credit at the time of modification for an upgrade to be considered.

Impaired loans are individually evaluated for credit loss and a specific allowance reserve is assigned for the amount of the estimated probable credit loss.  Refer to heading "Allowance for probable loan losses methodology" contained in Note 4 "Allowance For Loan Losses," to the Company's consolidated financial statements contained in the 2015 Annual Report on Form 10-K for further discussion of management's methodology used to estimate specific reserves for impaired loans.

The carrying value of impaired loans amounted to $21.4 million and $23.7 million at March 31, 2016 and December 31, 2015, respectively.  Total accruing impaired loans amounted to $10.3 million and $10.1 million at March 31, 2016 and December 31, 2015, respectively, while non-accrual impaired loans amounted to $11.1 million and $13.6 million as of March 31, 2016 and December 31, 2015, respectively.   The decrease was due primarily to the several larger commercial loan payoffs and principal payments discussed above. However, in the current period, the credit ratings of three larger commercial relationships were downgraded to criticized or adverse risk-ratings, based on a review of their individual business circumstances, including one commercial and industrial loan designated as impaired requiring additional specific reserves as of March 31, 2016.

The following tables set forth the recorded investment in impaired loans and the related specific allowance allocated as of the dates indicated.

Balance at March 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	$	11,810	$	9,926	$	9,165	$	761	$	179
Commercial and industrial	9,932		7,853		4,615		3,238		1,420
Commercial construction	3,024		2,989		1,552		1,437		488
Residential	395		307		307		—		—
Home equity	450		309		309		—		—
Consumer	23		21		—		21		21
Total	$	25,634	$	21,405	$	15,948	$	5,457	$	2,108

Balance at December 31, 2015
(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	$	14,903	$	12,287	$	11,734	$	553	$	186
Commercial and industrial	9,816		7,810		5,253		2,557		1,078
Commercial construction	3,147		3,032		1,583		1,449		499
Residential	453		366		366		—		—
Home equity	308		169		164		5		5
Consumer	25		24		—		24		24
Total	$	28,652	$	23,688	$	19,100	$	4,588	$	1,792

The following table presents the average recorded investment in impaired loans and the related interest recognized during the periods indicated:

	Three Months Ended March 31, 2016					Three Months Ended March 31, 2015
(Dollars in thousands)	Average recorded investment		Interest income recognized			Average recorded investment		Interest income recognized
Commercial real estate	$	9,668	$	43		$	15,479	$	45
Commercial and industrial	8,424		26			11,256		34
Commercial construction	2,975		37			2,624		26
Residential	308		—			459		—
Home equity	246		(2		)	179		1
Consumer	22		—			49		—
Total	$	21,643	$	104		$	30,046	$	106

At March 31, 2016, additional funding commitments for impaired loans totaled $469 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, 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. All loans that are modified are reviewed by the Company to identify if a TDR has occurred. TDR loans are included in the impaired loan category and, as such, these loans are individually evaluated and a specific reserve is assigned for the amount of the estimated probable credit loss. 

Total TDR loans, included in the impaired loan balances above, as of March 31, 2016 and December 31, 2015, were $15.6 million and $17.1 million, respectively. TDR loans on accrual status amounted to $10.3 million and $10.1 million at March 31, 2016 and December 31, 2015, respectively. TDR loans included in non-performing loans amounted to $5.3 million and $7.1 million at March 31, 2016 and December 31, 2015, respectively. The Company continues to work with 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 current economic environment.

At March 31, 2016, additional funding commitments for TDR loans totaled $469 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 tables present certain information regarding loan modifications classified as troubled debt restructures.

Loans modified as troubled debt restructurings during the three months endedMarch 31, 2016 are detailed below.

	Three months ended March 31, 2016
(Dollars in thousands)	Number of restructurings	Pre-modification outstanding recorded investment		Post-modification outstanding recorded investment
Commercial real estate	—	$	—	$	—
Commercial and industrial	1	264		264
Commercial construction	—	—		—
Residential	—	—		—
Home equity	—	—		—
Consumer	—	—		—
Total	1	$	264	$	264

There were no loans modified as troubled debt restructurings within the preceding twelve month period for which there was a subsequent payment default during the three months endedMarch 31, 2016.

There were no subsequent charge-offs associated with the TDRs noted in the table above during the three months ended months ended March 31, 2016. At March 31, 2016, there were no specific reserves allocated to the TDRs entered into during the 2016 period as management considered it likely that the unreserved principal will ultimately be collected. The TDR noted in the table above was on accrual status pre and post modification.

Loans modified as troubled debt restructurings during the three month period ended March 31, 2015 are detailed below. 

	Three months ended March 31, 2015
(Dollars in thousands)	Number of restructurings	Pre-modification outstanding recorded investment		Post-modification outstanding recorded investment
Commercial real estate	—	$	—	$	—
Commercial and industrial	4	869		869
Commercial construction	—	—		—
Residential	—	—		—
Home equity	—	—		—
Consumer	—	—		—
Total	4	$	869	$	869

There were no loans modified as troubled debt restructurings within the preceding twelve month period for which there was a subsequent payment default during the period.

At March 31, 2015, there were specific reserves of $61 thousand allocated to the TDRs entered into during the 2015 period as management considered it likely that the unreserved principal would ultimately be collected. Interest payments received on non-accruing TDRs in the table above which were applied to principal and not recognized in interest income during the three months ended months ended amounted to $1 thousand.

There were no subsequent charge-offs associated with the TDRs noted in the table above during the three months endedMarch 31, 2015.

Other real estate owned ("OREO")

Real estate acquired by the Company through foreclosure proceedings or the acceptance of a deed in lieu of foreclosure is classified as OREO. When property is acquired, it is generally recorded at the lesser of the loan's remaining principal balance, net of any unamortized deferred fees, or the estimated fair value of the property acquired, less estimated costs to sell, establishing a new cost basis. The estimated fair value is based on market appraisals and the Company's internal analysis. Any loan balance in excess of the estimated realizable fair value on the date of transfer is charged to the allowance for loan losses on that date. All costs incurred thereafter in maintaining the property, as well as subsequent declines in fair value, are charged to non-interest expense.

The Company carried no OREO at both March 31, 2016 and December 31, 2015. There were no sales on OREO during the three months endedMarch 31, 2016; there were also no additions to OREO, or subsequent impairment write-downs during the period. During the three months endedMarch 31, 2015, the Company recorded $154 thousand of net gains on OREO sales; however there were no subsequent write downs of OREO during that period.

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 $29.9 million at March 31, 2016, compared to $29.0 million at December 31, 2015, and $27.8 million at March 31, 2015. For the three months endedMarch 31, 2016 and March 31, 2015, the provision for loan losses amounted to $850 thousand and $625 thousand, respectively. The increase in the provision for the three months endedMarch 31, 2016 was due primarily to additional reserves allocated to criticized and adversely classified commercial loans.

In determining the provision to the allowance for loan losses, management takes into consideration the level of loan growth and an estimate of credit risk, which includes such items as adversely classified and non-performing loans, the estimated specific reserves needed for impaired loans, the level of net charge-offs, and the estimated impact of current economic conditions on credit quality. Loan growth for the three months endedMarch 31, 2016 was $4.7 million compared to $9.5 million during the three months endedMarch 31, 2015. Total non-performing loans as a percentage of total loans declined to 0.60% at March 31, 2016, compared to 1.07% at March 31, 2015. The balance of the allowance for loan losses allocated to impaired loans amounted to $2.1 million at March 31, 2016, compared to $2.7 million at March 31, 2015. The balance of the allowance for loan losses allocated to non-impaired classified loans amounted to $2.2 million at March 31, 2016, compared to $1.6 million at March 31, 2015. The Company recorded net recoveries of $52 thousand for the three months endedMarch 31, 2016, compared to net recoveries of $57 thousand for the three months endedMarch 31, 2015.

The allowance for loan losses to total loans ratio was 1.60% at March 31, 2016, 1.56% at December 31, 2015 and 1.65% at March 31, 2015. The decline in the allowance ratio reflects the generally improving credit quality of the loan portfolio due, in part, to improved economic conditions. However, in the current period, the credit ratings of three larger commercial relationships were downgraded to "criticized" or "adverse" risk-ratings, based on a review of their individual business circumstances, requiring higher levels of reserves in the current period which increased the allowance to total loan ratio compared to December 31, 2015.

Management continues to closely monitor the non-performing assets, charge-offs and necessary allowance levels, including specific reserves. 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 credit risks associated with the portfolio as of March 31, 2016.

Changes in the allowance for loan losses by segment for the three months ended months ended March 31, 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	294		463		64		16		6		7		850
Recoveries	19		129		—		—		—		2		150
Less: Charge offs	—		72		5		—		5		16		98
Ending Balance at March 31, 2016	$	13,827	$	10,278	$	3,964	$	1,077	$	541	$	223	$	29,910
Ending allowance balance:
Allotted to loans individually evaluated for impairment	$	179	$	1,420	$	488	$	—	$	—	$	21	$	2,108
Allotted to loans collectively evaluated for impairment	$	13,648	$	8,858	$	3,476	$	1,077	$	541	$	202	$	27,802

Changes in the allowance for loan losses by segment for the three months ended months ended March 31, 2015 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, 2014	$	12,664	$	9,245	$	3,384	$	989		$	608	$	231	$	27,121
Provision	78		530		11		(29		)	7		28		625
Recoveries	5		84		13		—			—		8		110
Less: Charge offs	—		17		—		—			—		36		53
Ending Balance at March 31, 2015	$	12,747	$	9,842	$	3,408	$	960		$	615	$	231	$	27,803
Ending allowance balance:
Allotted to loans individually evaluated for impairment	$	165	$	1,951	$	528	$	—		$	22	$	49	$	2,715
Allotted to loans collectively evaluated for impairment	$	12,582	$	7,891	$	2,880	$	960		$	593	$	182	$	25,088

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Deposits

3 Months Ended

Mar. 31, 2016

Deposits [Abstract]

Deposits

Deposits are summarized as follows:

(Dollars in thousands)	March 31, 2016		December 31, 2015
Non-interest bearing demand deposits	$	599,282	$	570,589
Interest bearing checking	313,314		313,674
Savings	179,127		167,304
Money market	735,492		692,114
Certificates of deposit $250,000 or less	127,925		129,993
Certificates of deposit more than $250,000	43,309		37,704
Total non-brokered deposits (1)	1,998,449		1,911,378
Brokered deposits (2)	89,288		106,770
Total deposits	$	2,087,737	$	2,018,148

(1) Includes reciprocal money market deposits and CDs received from participating banks in nationwide networks as a result of our customers electing to participate in programs to obtain full FDIC insurance. Essentially, the equivalent of the original deposit comes back to the Company as non-brokered deposits within the appropriate category under total deposits on the balance sheet.

(2) Primarily brokered CDs $250,000 and under.

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Borrowed Funds and Subordinated Debt

3 Months Ended

Mar. 31, 2016

Debt Disclosure [Abstract]

Borrowed Funds and Subordinated Debt

Borrowed Funds and Subordinated Debt

Borrowed funds amounted to $671 thousand at March 31, 2016, compared to $53.7 million at December 31, 2015. At March 31, 2016 borrowed funds consisted of FHLB borrowings only. At December 31, 2015 the borrowed funds balance was comprised of FHLB borrowings of $40.7 million and Other borrowings, which represented an overnight borrowing with a correspondent bank, totaling $13.0 million.

The Company also carried subordinated debt of $14.8 million at both March 31, 2016 and December 31, 2015.

The subordinated debt carried at both March 31, 2016 and December 31, 2015 consisted of $15.0 million in aggregate principal amount of Fixed-to-Floating Rate Subordinated Notes (the "Notes"), issued in January 2015, in a private placement to an accredited investor. The Notes, which are intended to qualify as Tier 2 capital for regulatory purposes, mature on January 30, 2030 (the "Maturity Date") and are callable by the Company, subject to regulatory approval, at a premium beginning January 30, 2020, and at par beginning January 30, 2025. The Notes pay interest at a fixed rate of 6.00% per annum through January 30, 2025, and beginning on January 31, 2025 through the Maturity Date, or any early redemption date, the interest rate on the Notes will adjust monthly at an interest rate of 3.90% plus 30-day LIBOR. Original note issuance costs were $190 thousand and have been netted against the subordinated debt on the balance sheet in accordance with recent accounting guidance which the Company adopted in the first quarter of 2015. These costs are being amortized over the life of the Notes.

Prior to the end of March 2015, the Company had subordinated debt consisting of Junior Subordinated Debt Securities (the "Debt"). In March 2000, Enterprise (MA) Capital Trust I (the "Trust"), a subsidiary of Enterprise Bancorp, issued $10.5 million of 10.88% trust preferred securities that were to mature in 2030 and were callable at a premium. The proceeds from the sale of the trust preferred securities were used by the Trust, along with the Company's $325 thousand capital contribution, to acquire $10.8 million in aggregate principal amount of the Company's 10.88% Debt that was to mature in 2030 and was callable.

In March 2015, the Company redeemed the Debt in full using proceeds from the $15.0 million in Notes issued in January 2015, which in turn allowed the Trust to redeem in full the trust preferred securities.

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Derivatives and Hedging Activities

3 Months Ended

Mar. 31, 2016

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 March 31, 2016 and 2015, the estimated fair values of these derivative instruments were considered to be immaterial.

The Company may use interest-rate swap agreements 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 March 31, 2016 and 2015.

Beginning in the fourth quarter of 2015, the Company implemented 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 transaction structure effectively minimizes the Bank’s net risk exposure resulting from such transactions. The customer interest-rate swap agreement allows commercial banking customers to convert a floating-rate loan payment to fixed-rate loan payment.

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 inverse relationship, are recognized directly in earnings. The Company had two interest-rate swaps at both March 31, 2016 and December 31, 2015 with an aggregate notional amount of $10.1 million at the end of both periods.

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 March 31, 2016				As of December 31, 2015
(Dollars in thousands)	Asset Derivatives		Liability Derivatives		Asset Derivatives		Liability Derivatives
Back-to-Back Swaps	$	225	$	225	$	16	$	16

There was no gain or loss recognized in income on derivatives during the three months endedMarch 31, 2016.

By using derivative financial instruments, the Company exposes itself to 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 limited exposure relating to interest rate swaps with institutional counterparties at March 31, 2016. The Company did not have any credit risk exposure for derivative financial instruments at March 31, 2016.

Certain derivative agreements 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 offsetting of derivatives and amounts subject to master netting agreements not offset in the consolidated balance sheet at the dates indicated.

	March 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	$	225	—	$	225	—	—	$	225
Liability Derivatives
Back-to-Back Swaps	$	225	—	$	225	—	240	$	(15	)

	December 31, 2015
	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	$	16	—	$	16	—	—	$	16
Liability Derivatives
Back-to-Back Swaps	$	16	—	$	16	—	—	$	16

The Company has agreements with certain derivative 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.

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Supplemental Retirement Plan and Other Postretirement Benefit Obligations

3 Months Ended

Mar. 31, 2016

Compensation and Retirement Disclosure [Abstract]

Supplemental Retirement Plan and Other Postretirement Benefit Obligations

Supplemental Retirement Plan and Other Postretirement Benefit Obligations

Supplemental Retirement Plan

The Company has salary continuation agreements with two of its current executive officers and one former executive officer. These 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 $31 thousand for both the three months ended March 31, 2016 and March 31, 2015.

Benefits paid amounted to $69 thousand for both the three months endedMarch 31, 2016 and March 31, 2015. The Company anticipates accruing an additional $93 thousand to the plan during the remainder of 2016.

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 total net periodic benefit costs, which were comprised primarily of interest costs, amounted to $19 thousand for the three months endedMarch 31, 2016, compared to $18 thousand for the three months endedMarch 31, 2015.

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Stock-Based Compensation

3 Months Ended

Mar. 31, 2016

Disclosure of Compensation Related Costs, Share-based Payments [Abstract]

Stock-Based Compensation

Stock-Based Compensation

The Company currently has three individual stock incentive plans: the 2003 plan as amended in 2009, the 2009 plan as amended in 2015 and the 2016 plan. The plans permit the Board of Directors to grant, under various terms, both incentive and non-qualified 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.  As of March 31, 2016, 107,992 shares remain available for future grants under the 2009 plan. The 2016 plan which was approved by our stockholders at the May 2016 annual meeting, with essentially the same terms as the 2003 and 2009 plans, has 350,000 shares available for future grants. The 2003 plan is closed to future grants, although several awards previously granted under this plan remain outstanding and may be exercised in the future.

The Company's stock-based compensation expense includes stock options and stock awards to officers and other employeesincluded in salary and benefits expense, and stock awards and stock compensation in lieu of cash fees to non-employee directors included in other operating expenses.  Total stock-based compensation expense was $443 thousand for the three months ended March 31, 2016, compared to $488 thousand for the three months ended March 31, 2015.

Stock Option Awards

The Company recognized stock-based compensation expense related to stock option awards of $79 thousand for the three months ended March 31, 2016, compared to $97 thousand for the three months ended March 31, 2015.

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 2016 and 2015.

	Three Months Ended March 31,
	2016			2015
Options granted	30,613			27,115
Term in years	10			10
Average assumptions used in the fair value model:
Expected volatility	42		%	47		%
Expected dividend yield	3.03		%	2.89		%
Expected life in years	7			7
Risk-free interest rate	1.91		%	1.95		%
Market price on date of grant	$	21.86		$	21.03
Per share weighted average fair value	$	7.90		$	8.51
Fair value as a percentage of market value at grant date	36		%	40		%

Options granted during the first three months of 2016 and 2015 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. 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 11 "Stock-Based Compensation Plans" in the Company's 2015 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 $294 thousand for the three months endedMarch 31, 2016, compared to $309 thousand for the three months endedMarch 31, 2015.

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 or about 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 or about the first anniversary date of the award.

The table below provides a summary of restricted stock awards granted in 2016 and 2015.

	Three Months Ended March 31,
Restricted Stock Awards	2016		2015
Two Year Vesting	9,060		7,276
Four Year Vesting	17,453		17,181
Performance-Based Vesting	35,071		30,262
Total Restricted Stock Awards	61,584		54,719
Weighted average grant date fair value	$	21.86	$	21.03

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. In accordance with 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.

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 $70 thousand for the three months endedMarch 31, 2016, compared to $82 thousand for the three months endedMarch 31, 2015, and is included in other operating expenses. In January 2016, non-employee directors were issued 10,657 shares of common stock in lieu of 2015 annual cash fees of $254 thousand at a market value price of $23.86 per share, the market value of the common stock on the opt-in measurement date of January 2, 2015.

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Earnings Per Share

3 Months Ended

Mar. 31, 2016

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. 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 March 31,
	2016	2015
Basic weighted average common shares outstanding	10,405,112	10,243,044
Dilutive shares	66,672	67,430
Diluted weighted average common shares outstanding	10,471,784	10,310,474

For the three months endedMarch 31, 2016, all options outstanding were included in the year-to-date calculation of diluted earnings per share, as they were all considered "in the money" under the treasury stock method.

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Fair Value Measurements

3 Months Ended

Mar. 31, 2016

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:

	March 31, 2016		Fair Value Measurements using:
(Dollars in thousands)	Fair Value		(level 1)		(level 2)		(level 3)
Assets measured on a recurring basis:
Fixed income securities	$	292,500	$	—	$	292,500	$	—
Equity securities	12,446		12,446		—		—
FHLB stock	2,793		—		—		2,793
Interest-rate swaps	225		—		225		—
Assets measured on a non-recurring basis:
Impaired loans (collateral dependent)	3,088		—		—		3,088
Liabilities measured on a recurring basis
Interest-rate swaps	225		—		225		—

	December 31, 2015		Fair Value Measurements using:
(Dollars in thousands)	Fair Value		(level 1)		(level 2)		(level 3)
Assets measured on a recurring basis:
Fixed income securities	$	288,701	$	—	$	288,701	$	—
Equity securities	11,657		11,657		—		—
FHLB stock	3,050		—		—		3,050
Interest-rate swaps	16		—		16		—
Assets measured on a non-recurring basis:
Impaired loans (collateral dependent)	2,516		—		—		2,516
Liabilities measured on a recurring basis
Interest-rate swaps	16		—		16		—

The Company did not have cause to transfer any assets between the fair value measurement levels during the three months endedMarch 31, 2016 or the year ended December 31, 2015.

All of the Company's fixed income investments and equity securities that are considered "available-for-sale" are carried at fair value.  The fixed income 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 fixed income 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 fixed income 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 (d) 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 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 at March 31, 2016 amounted to $1.2 million compared to $1.4 million at December 31, 2015.

When OREO property is acquired, it is generally recorded at the lesser of the loan's remaining principal balance, net of unamortized deferred fees, or the estimated fair value of the property acquired, less estimated costs to sell.  The estimated fair value is based on market appraisals and the Company's internal analysis.  Certain inputs used in appraisals or the Company's internal analysis are not always observable and therefore, OREO may be categorized as Level 3 within the fair value hierarchy.  The Company carried no OREO at both March 31, 2016 and December 31, 2015. There were no sales on OREO during the three months endedMarch 31, 2016; there were also no additions to OREO, or subsequent impairment write-downs during the period. During the three months endedMarch 31, 2015, the Company recorded $154 thousand of net gains on OREO sales; however there were no subsequent write downs of OREO during that period.

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 risks associated with the counterparties and the Company 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 March 31, 2016 and December 31, 2015 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 March 31, 2016 and December 31, 2015, the estimated fair value of the Company's derivative instruments was considered to be 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 March 31, 2016

(Dollars in thousands)	Fair Value	Valuation Technique	Unobservable Input	Unobservable Input Value or Range
Assets measured on a recurring basis:
FHLB stock	$2,793	FHLB Stated Par Value	N/A	N/A
Assets measured on a non-recurring basis:
Impaired loans (collateral dependent)	$3,088	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 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:

	March 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	$	770	$	771	$	—	$	771	$	—
Loans, net	1,834,782		1,850,258		—		—		1,850,258
Financial liabilities:
Certificates of deposit (including brokered)	260,522		260,636		—		260,636		—
Borrowed funds	671		671		—		671		—
Subordinated debt	14,825		14,758		—		—		14,758

	December 31, 2015				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	$	1,709	$	1,709	$	—	$	1,709	$	—
Loans, net	1,830,954		1,845,009		—		—		1,845,009
Financial liabilities:
Certificates of deposit (including brokered)	274,467		273,419		—		273,419		—
Borrowed funds	53,671		53,670		—		53,670		—
Subordinated debt	14,822		13,961		—		—		13,961

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, accrued interest receivable, non-term deposit accounts, and accrued interest payable. 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 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 non-mortgage 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 recordedat 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 March 31, 2016 and December 31, 2015 for similar instruments.  The fair value of subordinated debt was estimated using discounted cash flow analysis using a market rate of interest at March 31, 2016 and December 31, 2015.

Limitations:  The estimates of fair value of financial instruments were based on information available at March 31, 2016 and December 31, 2015 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.

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.

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Summary of Significant Accounting Policies (Policies)

3 Months Ended

Mar. 31, 2016

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, 2015 audited consolidated financial statements and notes thereto contained in the 2015 Annual Report on Form 10-K of Enterprise Bancorp, Inc. (the "Company" or "Enterprise"), a Massachusetts corporation, as filed with the Securities and Exchange Commission (the "SEC") on March 15, 2016.  The Company has not changed its accounting policies from those disclosed in its 2015 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.

The Company has 22 full service branches serving the greater Merrimack Valley and North Central regions of Massachusetts and Southern New Hampshire. The Company also plans to open its second Nashua, NH branch in the second quarter of 2016. Through the Bank and its subsidiaries, the Company offers a range of commercial and consumer loan products, and deposit and cash management services. The Company also offers 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.

Prior to the end of March 2015, pursuant to the Accounting Standards Codification ("ASC") Topic 810 "Consolidation of Variable Interest Entities," issued by the Financial Accounting Standards Board ("FASB"), the Company carried Junior Subordinated Debentures as a liability on its consolidated financial statements, along with the related interest expense. The debentures were issued by a statutory business trust (the "Trust") created by the Company in March 2000 under the laws of the State of Delaware, and the trust preferred securities issued by the Trust, and the related non-interest expense, were excluded from the Company's consolidated financial statements. In March 2015, the Company redeemed in full the Junior Subordinated Debentures, which in turn allowed the Trust to redeem in full the trust preferred securities. The Company also dissolved the Trust in April 2015. See Note 6, "Borrowed Funds and Subordinated Debt," below for further information on the Company's subordinated debt.

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 accounting principles generally accepted in the United States ("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.

Reclassifications

Certain previous years' amounts in the consolidated financial statements, and notes thereto, have been reclassified to conform to the current year's presentation.

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 2015 Annual Report on Form 10-K, the three most significant areas in which management applies critical assumptions and estimates that are particularly susceptible to change relate to the determination 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 2015 Annual Report on Form 10-K for significant accounting policies. The Company has not changed its significant accounting policies from those disclosed in its 2015 Annual Report filed on Form 10-K.

Reporting Comprehensive Income

Reporting 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 Accounting Standards Update ("ASU") No. 2013-02, Comprehensive Income (Topic 220): Reporting Amounts Reclassified Out of Accumulated Other Comprehensive Income, 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."

Restricted Investments

Restricted Investments

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 the Company's borrowing relationship from the FHLB.  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.

In conjunction with the other-than-temporary-impairment ("OTTI") review on available-for-sale investments (See Note 2, "Investments," for additional information), management also regularly reviews its holdings of FHLB stock for 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.

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 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 March 31, 2016.  The Company is subject to U.S. federal and state income tax examinations by taxing authorities for the 2012 through 2015 tax years.

Recent Accounting Pronouncements

Recent Accounting Pronouncements

In April 2015, the Financial Accounting Standards Board ("FASB") issued ASU No. 2015-03, Imputation of Interest (Subtopic 835-30): Simplifying the Presentation of Debt Issuance Costs. The amendments in this ASU require that debt issuance costs related to a recognized debt liability be presented in the balance sheet as a direct deduction from the carrying amount of that debt liability, consistent with debt discounts. The recognition and measurement guidance for debt issuance costs are not affected by the amendments in this ASU. Entities are required to apply the new guidance on a retrospective basis, wherein the balance sheet of each individual period presented should be adjusted to reflect the period-specific effects of applying the new guidance. For public business entities, the amendments are effective for financial statements issued for fiscal years beginning after December 15, 2015, and interim periods within those fiscal years. Early adoption of the amendments is permitted for financial statements that have not been previously issued. The Company early adopted this ASU as of January 1, 2015 in relation to the Company's Fixed-to-Floating Rate Subordinated Notes issued in January 2015. This adoption did not have a material impact on the Company's financial statements or results of operations.

In January 2015, the FASB issued Accounting Standards Update (ASU) 2015-01, "Income Statement-Extraordinary and Unusual Items (Subtopic 225-20): Simplifying Income Statement Presentation by Eliminating the Concept of Extraordinary Items." This ASU will align more closely GAAP income statement presentation guidance with International Audit Standards (IAS) 1, Presentation of Financial Statements, which prohibits the presentation and disclosure of extraordinary items. The amendments in this update are effective for fiscal years, and interim periods within those fiscal years, beginning after December 15, 2015. The adoption of this standard did not have an impact on the Company's financial statements. 

For information regarding recent accounting pronouncements not yet adopted by the Company, see Item 2, "Management's Discussion and Analysis of Financial Condition and Results of Operations," under the heading "Recent Accounting Pronouncements Not Yet Adopted."

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Investments (Tables)

3 Months Ended

Mar. 31, 2016

Investments, Debt and Equity Securities [Abstract]

Schedule of Available-for-sale Securities Reconciliation

The amortized cost and carrying values of investment securities at the dates specified are summarized as follows:

	March 31, 2016
(Dollars in thousands)	Amortized cost		Unrealized gains		Unrealized losses		Fair Value
Federal agency obligations (1)	$	78,640	$	1,097	$	19	$	79,718
Residential federal agency MBS (1)	72,069		844		184		72,729
Commercial federal agency MBS(1)	27,499		286		—		27,785
Municipal securities	97,040		2,928		43		99,925
Corporate bonds	10,284		128		29		10,383
Certificates of deposits (2)	1,943		17		—		1,960
Total fixed income securities	287,475		5,300		275		292,500
Equity investments	10,969		1,879		402		12,446
Total available-for-sale securities, at fair value	$	298,444	$	7,179	$	677	$	304,946

	December 31, 2015
(Dollars in thousands)	Amortized cost		Unrealized gains		Unrealized losses		Fair Value
Federal agency obligations(1)	$	78,626	$	352	$	153	$	78,825
Residential federal agency MBS(1)	75,105		406		648		74,863
Commercial federal agency MBS(1)	23,908		—		363		23,545
Municipal securities	96,189		2,357		35		98,511
Corporate bonds	10,257		44		95		10,206
Certificates of deposits(2)	2,753		—		2		2,751
Total fixed income securities	286,838		3,159		1,296		288,701
Equity investments	10,043		1,966		352		11,657
Total available-for-sale securities, at fair value	$	296,881	$	5,125	$	1,648	$	300,358

__________________________________________

(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.

Investments Classified by Contractual Maturity Date

The contractual maturity distribution at March 31, 2016 of total fixed income investments was as follows:

	Within One Year				After One, But Within  Five Years				After Five, But Within Ten Years				After Ten Years
	Amortized Cost		Yields		Amortized Cost		Yields		Amortized Cost		Yields		Amortized Cost		Yields
At amortized cost:
Federal agency obligations	$	7,035	0.91	%	$	62,054	1.59	%	$	9,551	2.22	%	$	—	—	%
Residential federal agency MBS	—		—	%	3,101		3.17	%	1,242		1.91	%	67,726		2.13	%
Commercial federal agency MBS	—		—	%	—		—	%	27,499		2.26	%	—		—	%
Municipal securities	6,233		2.31	%	25,813		3.58	%	33,612		3.65	%	31,382		3.85	%
Corporate bonds	528		1.33	%	5,175		2.15	%	4,581		2.94	%	—		—	%
CDs	993		0.34	%	950		2.13	%	—		—	%	—		—	%
Total fixed income securities	$	14,789	1.48	%	$	97,093	2.21	%	$	76,485	2.90	%	$	99,108	2.67	%
At fair value:
Total fixed income securities	$	14,841			$	98,726			$	78,292			$	100,641

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Loans (Tables)

3 Months Ended

Mar. 31, 2016

Receivables [Abstract]

Schedule of Loans by Loan Classification

Major classifications of loans at the periods indicated were as follows:

(Dollars in thousands)	March 31, 2016			December 31, 2015
Commercial real estate	$	936,907		$	936,921
Commercial and industrial	456,436			458,553
Commercial construction	207,214			202,993
Total commercial loans	1,600,557			1,598,467
Residential mortgages	170,585			169,188
Home equity loans and lines	84,665			83,373
Consumer	10,539			10,747
Total retail loans	265,789			263,308
Gross loans	1,866,346			1,861,775
Deferred loan origination fees, net	(1,654		)	(1,813		)
Total loans	1,864,692			1,859,962
Allowance for loan losses	(29,910		)	(29,008		)
Net loans	$	1,834,782		$	1,830,954

Schedule of Loans Pledged as Collateral

Loans designated as qualified collateral and pledged to the FHLB for borrowing capacity are summarized below:

(Dollars in thousands)	March 31, 2016		December 31, 2015
Commercial real estate	$	277,056	$	281,802
Residential mortgages	122,744		118,855
Home equity	13,349		13,972
Total loans pledged to FHLB	$	413,149	$	414,629

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Allowance For Loan Loss (Tables)

3 Months Ended

Mar. 31, 2016

Receivables [Abstract]

Financing Receivables by Evaluation Method

The balances of loans as of March 31, 2016 by segment and evaluation method are summarized as follows: 

(Dollars in thousands)	Loans individually evaluated for impairment		Loans collectively evaluated for impairment			Total Loans
Commercial real estate	$	9,926	$	926,981		$	936,907
Commercial and industrial	7,853		448,583			456,436
Commercial construction	2,989		204,225			207,214
Residential	307		170,278			170,585
Home equity	309		84,356			84,665
Consumer	21		10,518			10,539
Deferred Fees	—		(1,654		)	(1,654		)
Total loans	$	21,405	$	1,843,287		$	1,864,692

The balances of loans as of December 31, 2015 by segment and evaluation method are summarized as follows:

(Dollars in thousands)	Loans individually evaluated for impairment		Loans collectively evaluated for impairment			Total Loans
Commercial real estate	$	12,287	$	924,634		$	936,921
Commercial and industrial	7,810		450,743			458,553
Commercial construction	3,032		199,961			202,993
Residential	366		168,822			169,188
Home equity	169		83,204			83,373
Consumer	24		10,723			10,747
Deferred Fees	—		(1,813		)	(1,813		)
Total loans	$	23,688	$	1,836,274		$	1,859,962

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 risk rating category at the periods indicated. 

	March 31, 2016
	Adversely Classified						Not Adversely
(Dollars in thousands)	Substandard		Doubtful		Loss		Classified		Gross Loans
Commercial real estate	$	11,586	$	—	$	—	$	925,321	$	936,907
Commercial and industrial	9,100		42		3		447,291		456,436
Commercial construction	1,734		—		—		205,480		207,214
Residential	1,213		—		—		169,372		170,585
Home equity	644		—		—		84,021		84,665
Consumer	37		11		—		10,491		10,539
Total gross loans	$	24,314	$	53	$	3	$	1,841,976	$	1,866,346

	December 31, 2015
	Adversely Classified						Not Adversely
(Dollars in thousands)	Substandard		Doubtful		Loss		Classified		Gross Loans
Commercial real estate	$	12,487	$	—	$	—	$	924,434	$	936,921
Commercial and industrial	8,670		—		3		449,880		458,553
Commercial construction	1,776		—		—		201,217		202,993
Residential	1,278		—		—		167,910		169,188
Home equity	503		—		5		82,865		83,373
Consumer	38		11		—		10,698		10,747
Total gross loans	$	24,752	$	11	$	8	$	1,837,004	$	1,861,775

Past Due Financing Receivables

The following tables present age analysis of past due loans as of the dates indicated. 

Balance at March 31, 2016
(Dollars in thousands)	Loans 30-59 Days Past Due		Loans 60-89 Days Past Due		Loans 90 or More Days Past Due (non- accrual)		Total Past Due Loans		Current Loans		Gross Loans
Commercial real estate	$	4,665	$	398	$	6,188	$	11,251	$	925,656	$	936,907
Commercial and industrial	833		238		4,106		5,177		451,259		456,436
Commercial construction	175		—		213		388		206,826		207,214
Residential	—		553		307		860		169,725		170,585
Home equity	—		—		424		424		84,241		84,665
Consumer	7		19		26		52		10,487		10,539
Total gross loans	$	5,680	$	1,208	$	11,264	$	18,152	$	1,848,194	$	1,866,346

Balance at December 31, 2015
(Dollars in thousands)	Loans 30-59 Days Past Due		Loans 60-89 Days Past Due		Loans 90 or More Days Past Due (non- accrual)		Total Past Due Loans		Current Loans		Gross Loans
Commercial real estate	$	1,124	$	1,140	$	8,506	$	10,770	$	926,151	$	936,921
Commercial and industrial	1,218		691		4,323		6,232		452,321		458,553
Commercial construction	581		—		335		916		202,077		202,993
Residential	250		180		366		796		168,392		169,188
Home equity	622		—		288		910		82,463		83,373
Consumer	35		10		27		72		10,675		10,747
Total gross loans	$	3,830	$	2,021	$	13,845	$	19,696	$	1,842,079	$	1,861,775

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 March 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	$	11,810	$	9,926	$	9,165	$	761	$	179
Commercial and industrial	9,932		7,853		4,615		3,238		1,420
Commercial construction	3,024		2,989		1,552		1,437		488
Residential	395		307		307		—		—
Home equity	450		309		309		—		—
Consumer	23		21		—		21		21
Total	$	25,634	$	21,405	$	15,948	$	5,457	$	2,108

Balance at December 31, 2015
(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	$	14,903	$	12,287	$	11,734	$	553	$	186
Commercial and industrial	9,816		7,810		5,253		2,557		1,078
Commercial construction	3,147		3,032		1,583		1,449		499
Residential	453		366		366		—		—
Home equity	308		169		164		5		5
Consumer	25		24		—		24		24
Total	$	28,652	$	23,688	$	19,100	$	4,588	$	1,792

The following table presents the average recorded investment in impaired loans and the related interest recognized during the periods indicated:

	Three Months Ended March 31, 2016					Three Months Ended March 31, 2015
(Dollars in thousands)	Average recorded investment		Interest income recognized			Average recorded investment		Interest income recognized
Commercial real estate	$	9,668	$	43		$	15,479	$	45
Commercial and industrial	8,424		26			11,256		34
Commercial construction	2,975		37			2,624		26
Residential	308		—			459		—
Home equity	246		(2		)	179		1
Consumer	22		—			49		—
Total	$	21,643	$	104		$	30,046	$	106

Troubled Debt Restructurings on Financing Receivables

Loans modified as troubled debt restructurings during the three months endedMarch 31, 2016 are detailed below.

	Three months ended March 31, 2016
(Dollars in thousands)	Number of restructurings	Pre-modification outstanding recorded investment		Post-modification outstanding recorded investment
Commercial real estate	—	$	—	$	—
Commercial and industrial	1	264		264
Commercial construction	—	—		—
Residential	—	—		—
Home equity	—	—		—
Consumer	—	—		—
Total	1	$	264	$	264

Loans modified as troubled debt restructurings during the three month period ended March 31, 2015 are detailed below. 

	Three months ended March 31, 2015
(Dollars in thousands)	Number of restructurings	Pre-modification outstanding recorded investment		Post-modification outstanding recorded investment
Commercial real estate	—	$	—	$	—
Commercial and industrial	4	869		869
Commercial construction	—	—		—
Residential	—	—		—
Home equity	—	—		—
Consumer	—	—		—
Total	4	$	869	$	869

Allowance for Credit Losses on Financing Receivables

Changes in the allowance for loan losses by segment for the three months ended months ended March 31, 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	294		463		64		16		6		7		850
Recoveries	19		129		—		—		—		2		150
Less: Charge offs	—		72		5		—		5		16		98
Ending Balance at March 31, 2016	$	13,827	$	10,278	$	3,964	$	1,077	$	541	$	223	$	29,910
Ending allowance balance:
Allotted to loans individually evaluated for impairment	$	179	$	1,420	$	488	$	—	$	—	$	21	$	2,108
Allotted to loans collectively evaluated for impairment	$	13,648	$	8,858	$	3,476	$	1,077	$	541	$	202	$	27,802

Changes in the allowance for loan losses by segment for the three months ended months ended March 31, 2015 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, 2014	$	12,664	$	9,245	$	3,384	$	989		$	608	$	231	$	27,121
Provision	78		530		11		(29		)	7		28		625
Recoveries	5		84		13		—			—		8		110
Less: Charge offs	—		17		—		—			—		36		53
Ending Balance at March 31, 2015	$	12,747	$	9,842	$	3,408	$	960		$	615	$	231	$	27,803
Ending allowance balance:
Allotted to loans individually evaluated for impairment	$	165	$	1,951	$	528	$	—		$	22	$	49	$	2,715
Allotted to loans collectively evaluated for impairment	$	12,582	$	7,891	$	2,880	$	960		$	593	$	182	$	25,088

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Deposits (Tables)

3 Months Ended

Mar. 31, 2016

Deposits [Abstract]

Schedule of Deposit Liabilities

Deposits are summarized as follows:

(Dollars in thousands)	March 31, 2016		December 31, 2015
Non-interest bearing demand deposits	$	599,282	$	570,589
Interest bearing checking	313,314		313,674
Savings	179,127		167,304
Money market	735,492		692,114
Certificates of deposit $250,000 or less	127,925		129,993
Certificates of deposit more than $250,000	43,309		37,704
Total non-brokered deposits (1)	1,998,449		1,911,378
Brokered deposits (2)	89,288		106,770
Total deposits	$	2,087,737	$	2,018,148

(1) Includes reciprocal money market deposits and CDs received from participating banks in nationwide networks as a result of our customers electing to participate in programs to obtain full FDIC insurance. Essentially, the equivalent of the original deposit comes back to the Company as non-brokered deposits within the appropriate category under total deposits on the balance sheet.

(2) Primarily brokered CDs $250,000 and under.

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Derivatives and Hedging Activities (Tables)

3 Months Ended

Mar. 31, 2016

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 March 31, 2016				As of December 31, 2015
(Dollars in thousands)	Asset Derivatives		Liability Derivatives		Asset Derivatives		Liability Derivatives
Back-to-Back Swaps	$	225	$	225	$	16	$	16

Schedule of Derivatives- Offsetting Assets and Liabilities

The table below also presents the offsetting of derivatives and amounts subject to master netting agreements not offset in the consolidated balance sheet at the dates indicated.

	March 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	$	225	—	$	225	—	—	$	225
Liability Derivatives
Back-to-Back Swaps	$	225	—	$	225	—	240	$	(15	)

	December 31, 2015
	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	$	16	—	$	16	—	—	$	16
Liability Derivatives
Back-to-Back Swaps	$	16	—	$	16	—	—	$	16

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Stock-Based Compensation (Tables)

3 Months Ended

Mar. 31, 2016

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 2016 and 2015.

	Three Months Ended March 31,
	2016			2015
Options granted	30,613			27,115
Term in years	10			10
Average assumptions used in the fair value model:
Expected volatility	42		%	47		%
Expected dividend yield	3.03		%	2.89		%
Expected life in years	7			7
Risk-free interest rate	1.91		%	1.95		%
Market price on date of grant	$	21.86		$	21.03
Per share weighted average fair value	$	7.90		$	8.51
Fair value as a percentage of market value at grant date	36		%	40		%

Schedule of Restricted Stock Awards Granted

The table below provides a summary of restricted stock awards granted in 2016 and 2015.

	Three Months Ended March 31,
Restricted Stock Awards	2016		2015
Two Year Vesting	9,060		7,276
Four Year Vesting	17,453		17,181
Performance-Based Vesting	35,071		30,262
Total Restricted Stock Awards	61,584		54,719
Weighted average grant date fair value	$	21.86	$	21.03

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Earnings Per Share (Tables)

3 Months Ended

Mar. 31, 2016

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 March 31,
	2016	2015
Basic weighted average common shares outstanding	10,405,112	10,243,044
Dilutive shares	66,672	67,430
Diluted weighted average common shares outstanding	10,471,784	10,310,474

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Fair Value Measurements (Tables)

3 Months Ended

Mar. 31, 2016

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:

	March 31, 2016		Fair Value Measurements using:
(Dollars in thousands)	Fair Value		(level 1)		(level 2)		(level 3)
Assets measured on a recurring basis:
Fixed income securities	$	292,500	$	—	$	292,500	$	—
Equity securities	12,446		12,446		—		—
FHLB stock	2,793		—		—		2,793
Interest-rate swaps	225		—		225		—
Assets measured on a non-recurring basis:
Impaired loans (collateral dependent)	3,088		—		—		3,088
Liabilities measured on a recurring basis
Interest-rate swaps	225		—		225		—

	December 31, 2015		Fair Value Measurements using:
(Dollars in thousands)	Fair Value		(level 1)		(level 2)		(level 3)
Assets measured on a recurring basis:
Fixed income securities	$	288,701	$	—	$	288,701	$	—
Equity securities	11,657		11,657		—		—
FHLB stock	3,050		—		—		3,050
Interest-rate swaps	16		—		16		—
Assets measured on a non-recurring basis:
Impaired loans (collateral dependent)	2,516		—		—		2,516
Liabilities measured on a recurring basis
Interest-rate swaps	16		—		16		—

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 March 31, 2016

(Dollars in thousands)	Fair Value	Valuation Technique	Unobservable Input	Unobservable Input Value or Range
Assets measured on a recurring basis:
FHLB stock	$2,793	FHLB Stated Par Value	N/A	N/A
Assets measured on a non-recurring basis:
Impaired loans (collateral dependent)	$3,088	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:

	March 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	$	770	$	771	$	—	$	771	$	—
Loans, net	1,834,782		1,850,258		—		—		1,850,258
Financial liabilities:
Certificates of deposit (including brokered)	260,522		260,636		—		260,636		—
Borrowed funds	671		671		—		671		—
Subordinated debt	14,825		14,758		—		—		14,758

	December 31, 2015				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	$	1,709	$	1,709	$	—	$	1,709	$	—
Loans, net	1,830,954		1,845,009		—		—		1,845,009
Financial liabilities:
Certificates of deposit (including brokered)	274,467		273,419		—		273,419		—
Borrowed funds	53,671		53,670		—		53,670		—
Subordinated debt	14,822		13,961		—		—		13,961

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Summary of Significant Accounting Policies (Details) $ / shares in Units, $ in Millions	3 Months Ended
	Mar. 31, 2016 branches segment	Apr. 21, 2016 USD ($) $ / shares
Summary of Significant Accounting Policies [Line Items]
Number of branches | branches	22
Reportable operating segments | segment	1
Subsequent Event
Summary of Significant Accounting Policies [Line Items]
Price Per Share, subcription rights and community offering | $ / shares		$ 21.50
Minimum | Subsequent Event
Summary of Significant Accounting Policies [Line Items]
Intended capital to be raised subscription rights and community offeriing		$ 10
Maximum | Subsequent Event
Summary of Significant Accounting Policies [Line Items]
Intended capital to be raised subscription rights and community offeriing		$ 12

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Investments Available-for-sale (Details) $ in Thousands		Mar. 31, 2016 USD ($) investments	Dec. 31, 2015 USD ($)
Available-for-sale Securities, Gross Unrealized Gain (Loss) [Abstract]
Fair Value		$ 304,946	$ 300,358
Securities pledged as collateral		290,500
Total fixed income securities
Available-for-sale Securities, Gross Unrealized Gain (Loss) [Abstract]
Amortized cost		287,475	286,838
Unrealized gains		5,300	3,159
Unrealized losses		275	1,296
Fair Value		292,500	288,701
Federal Agency Obligations
Available-for-sale Securities, Gross Unrealized Gain (Loss) [Abstract]
Amortized cost	[1]	78,640	78,626
Unrealized gains	[1]	1,097	352
Unrealized losses	[1]	19	153
Fair Value	[1]	79,718	78,825
Residential federal agency MBS
Available-for-sale Securities, Gross Unrealized Gain (Loss) [Abstract]
Amortized cost	[1]	72,069	75,105
Unrealized gains	[1]	844	406
Unrealized losses	[1]	184	648
Fair Value	[1]	72,729	74,863
Collateralized Mortgage Obligations
Available-for-sale Securities, Gross Unrealized Gain (Loss) [Abstract]
Fair Value		20,000	20,800
Commercial federal agency MBS
Available-for-sale Securities, Gross Unrealized Gain (Loss) [Abstract]
Amortized cost	[1]	27,499	23,908
Unrealized gains	[1]	286	0
Unrealized losses	[1]	0	363
Fair Value	[1]	27,785	23,545
Municipal securities
Available-for-sale Securities, Gross Unrealized Gain (Loss) [Abstract]
Amortized cost		97,040	96,189
Unrealized gains		2,928	2,357
Unrealized losses		43	35
Fair Value		99,925	98,511
Corporate bonds
Available-for-sale Securities, Gross Unrealized Gain (Loss) [Abstract]
Amortized cost		10,284	10,257
Unrealized gains		128	44
Unrealized losses		29	95
Fair Value		10,383	10,206
Certificates of Deposit
Available-for-sale Securities, Gross Unrealized Gain (Loss) [Abstract]
Amortized cost	[2]	1,943	2,753
Unrealized gains	[2]	17	0
Unrealized losses	[2]	0	2
Fair Value	[2]	1,960	2,751
Equity investments
Available-for-sale Securities, Gross Unrealized Gain (Loss) [Abstract]
Amortized cost		10,969	10,043
Unrealized gains		1,879	1,966
Unrealized losses		402	352
Fair Value		$ 12,446	11,657
Percent of portfolio invested in financial services		16.00%
Fixed Income and Equity Securities, Excluding CDs
Available-for-sale Securities, Gross Unrealized Gain (Loss) [Abstract]
Unrealized losses		$ 677
Number of securities in loss position | investments		36
Investments Temporarily Impaired, Fair Value		$ 28,600
Number of securities in a loss position, 12 months or longer | investments		9
Investments Temporarily Impaired, 12 months or longer, Unrealized Losses		$ 194
Total available for sale securities, at fair value
Available-for-sale Securities, Gross Unrealized Gain (Loss) [Abstract]
Amortized cost		298,444	296,881
Unrealized gains		7,179	5,125
Unrealized losses		677	1,648
Fair Value		$ 304,946	$ 300,358

[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.

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Investments Maturities (Details) $ in Thousands	Mar. 31, 2016 USD ($)
Schedule of Available-for-sale Securities [Line Items]
Callable Securities, Fair Value	$ 49,400
Total fixed income securities
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost, Within One Year	$ 14,789
Amortized Cost, Within One Year, Yield	1.48%
Fair Value, Within One Year	$ 14,841
Amortized Cost Basis, After One, But Within Five Years	$ 97,093
Amortized Cost Basis, After One, But Within Five Years, Yield	2.21%
Fair Value, After One, But Within Five Years	$ 98,726
Amortized Cost, After Five, But Within Ten Years	$ 76,485
Amortized Cost, After Five, But Within Ten Years, Yield	2.90%
Fair Value, after Five but Within Ten Years	$ 78,292
Amortized Cost Basis, After Ten Years	$ 99,108
Amortized Cost after Ten Years, Yield	2.67%
Fair Value, After Ten Years	$ 100,641
Federal agency obligations
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost, Within One Year	$ 7,035
Amortized Cost, Within One Year, Yield	0.91%
Amortized Cost Basis, After One, But Within Five Years	$ 62,054
Amortized Cost Basis, After One, But Within Five Years, Yield	1.59%
Amortized Cost, After Five, But Within Ten Years	$ 9,551
Amortized Cost, After Five, But Within Ten Years, Yield	2.22%
Amortized Cost Basis, After Ten Years	$ 0
Amortized Cost after Ten Years, Yield	0.00%
Residential federal agency MBS
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost, Within One Year	$ 0
Amortized Cost, Within One Year, Yield	0.00%
Amortized Cost Basis, After One, But Within Five Years	$ 3,101
Amortized Cost Basis, After One, But Within Five Years, Yield	3.17%
Amortized Cost, After Five, But Within Ten Years	$ 1,242
Amortized Cost, After Five, But Within Ten Years, Yield	1.91%
Amortized Cost Basis, After Ten Years	$ 67,726
Amortized Cost after Ten Years, Yield	2.13%
Commercial federal agency MBS
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost, Within One Year	$ 0
Amortized Cost, Within One Year, Yield	0.00%
Amortized Cost Basis, After One, But Within Five Years	$ 0
Amortized Cost Basis, After One, But Within Five Years, Yield	0.00%
Amortized Cost, After Five, But Within Ten Years	$ 27,499
Amortized Cost, After Five, But Within Ten Years, Yield	2.26%
Amortized Cost Basis, After Ten Years	$ 0
Amortized Cost after Ten Years, Yield	0.00%
Municipal securities
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost, Within One Year	$ 6,233
Amortized Cost, Within One Year, Yield	2.31%
Amortized Cost Basis, After One, But Within Five Years	$ 25,813
Amortized Cost Basis, After One, But Within Five Years, Yield	3.58%
Amortized Cost, After Five, But Within Ten Years	$ 33,612
Amortized Cost, After Five, But Within Ten Years, Yield	3.65%
Amortized Cost Basis, After Ten Years	$ 31,382
Amortized Cost after Ten Years, Yield	3.85%
Corporate bonds
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost, Within One Year	$ 528
Amortized Cost, Within One Year, Yield	1.33%
Amortized Cost Basis, After One, But Within Five Years	$ 5,175
Amortized Cost Basis, After One, But Within Five Years, Yield	2.15%
Amortized Cost, After Five, But Within Ten Years	$ 4,581
Amortized Cost, After Five, But Within Ten Years, Yield	2.94%
Amortized Cost Basis, After Ten Years	$ 0
Amortized Cost after Ten Years, Yield	0.00%
Certificates of Deposit
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost, Within One Year	$ 993
Amortized Cost, Within One Year, Yield	0.34%
Amortized Cost Basis, After One, But Within Five Years	$ 950
Amortized Cost Basis, After One, But Within Five Years, Yield	2.13%
Amortized Cost, After Five, But Within Ten Years	$ 0
Amortized Cost, After Five, But Within Ten Years, Yield	0.00%
Amortized Cost Basis, After Ten Years	$ 0
Amortized Cost after Ten Years, Yield	0.00%

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Loans - Balance by Class of Loans (Details) - USD ($) $ in Thousands	Mar. 31, 2016	Dec. 31, 2015	Mar. 31, 2015	Dec. 31, 2014
Schedule of Loans by Loan Classification [Line Items]
Gross loans	$ 1,866,346	$ 1,861,775
Deferred loan origination fees, net	(1,654)	(1,813)
Total loans	1,864,692	1,859,962
Allowance for loan losses	(29,910)	(29,008)	$ (27,803)	$ (27,121)
Net Loans	1,834,782	1,830,954
Commercial
Schedule of Loans by Loan Classification [Line Items]
Gross loans	1,600,557	1,598,467
Commercial real estate
Schedule of Loans by Loan Classification [Line Items]
Gross loans	936,907	936,921
Allowance for loan losses	(13,827)	(13,514)	(12,747)	(12,664)
Commercial and industrial
Schedule of Loans by Loan Classification [Line Items]
Gross loans	456,436	458,553
Allowance for loan losses	(10,278)	(9,758)	(9,842)	(9,245)
Commercial construction
Schedule of Loans by Loan Classification [Line Items]
Gross loans	207,214	202,993
Allowance for loan losses	(3,964)	(3,905)	(3,408)	(3,384)
Retail
Schedule of Loans by Loan Classification [Line Items]
Gross loans	265,789	263,308
Residential
Schedule of Loans by Loan Classification [Line Items]
Gross loans	170,585	169,188
Allowance for loan losses	(1,077)	(1,061)	(960)	(989)
Home Equity
Schedule of Loans by Loan Classification [Line Items]
Gross loans	84,665	83,373
Allowance for loan losses	(541)	(540)	(615)	(608)
Consumer
Schedule of Loans by Loan Classification [Line Items]
Gross loans	10,539	10,747
Allowance for loan losses	$ (223)	$ (230)	$ (231)	$ (231)

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Loans - Loan Categories Narrative (Details) $ in Millions	3 Months Ended
	Mar. 31, 2016 USD ($) payment	Dec. 31, 2015 USD ($)
Commercial
Schedule of Loans by Loan Classification [Line Items]
Participation loans amount	$ 59.6	$ 62.3
Participations loans sold that are still serviced amount	$ 53.1	52.7
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	$ 18.2	$ 18.5
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
Period a loan has a fixed rate	3 years
Home Equity Loans | Maximum
Schedule of Loans by Loan Classification [Line Items]
Repayment period, term of loan	15 years
Period a loan has a fixed rate	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%

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Loans - Loans Serving as Collateral (Details) - USD ($) $ in Thousands	Mar. 31, 2016	Dec. 31, 2015
Financial Instruments Owned and Pledged as Collateral [Line Items]
Loans pledged to the FHLB for borrowing capacity	$ 413,149	$ 414,629
Commercial real estate
Financial Instruments Owned and Pledged as Collateral [Line Items]
Loans pledged to the FHLB for borrowing capacity	277,056	281,802
Residential
Financial Instruments Owned and Pledged as Collateral [Line Items]
Loans pledged to the FHLB for borrowing capacity	122,744	118,855
Home Equity
Financial Instruments Owned and Pledged as Collateral [Line Items]
Loans pledged to the FHLB for borrowing capacity	$ 13,349	$ 13,972

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Allowance For Loan Loss - Evaluation Method (Details) - USD ($) $ in Thousands	Mar. 31, 2016	Dec. 31, 2015
Schedule of Financing Receivable by Evaluation Method [Line Items]
Loans individually evaluated for impairment	$ 21,405	$ 23,688
Loans collectively evaluated for impairment	1,843,287	1,836,274
Gross loans	1,866,346	1,861,775
Deferred loan origination fees, net	(1,654)	(1,813)
Total loans	1,864,692	1,859,962
Commercial real estate
Schedule of Financing Receivable by Evaluation Method [Line Items]
Loans individually evaluated for impairment	9,926	12,287
Loans collectively evaluated for impairment	926,981	924,634
Gross loans	936,907	936,921
Commercial and industrial
Schedule of Financing Receivable by Evaluation Method [Line Items]
Loans individually evaluated for impairment	7,853	7,810
Loans collectively evaluated for impairment	448,583	450,743
Gross loans	456,436	458,553
Commercial construction
Schedule of Financing Receivable by Evaluation Method [Line Items]
Loans individually evaluated for impairment	2,989	3,032
Loans collectively evaluated for impairment	204,225	199,961
Gross loans	207,214	202,993
Residential
Schedule of Financing Receivable by Evaluation Method [Line Items]
Loans individually evaluated for impairment	307	366
Loans collectively evaluated for impairment	170,278	168,822
Gross loans	170,585	169,188
Home Equity
Schedule of Financing Receivable by Evaluation Method [Line Items]
Loans individually evaluated for impairment	309	169
Loans collectively evaluated for impairment	84,356	83,204
Gross loans	84,665	83,373
Consumer
Schedule of Financing Receivable by Evaluation Method [Line Items]
Loans individually evaluated for impairment	21	24
Loans collectively evaluated for impairment	10,518	10,723
Gross loans	$ 10,539	$ 10,747

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Allowance For Loan Loss - Adversely Classified Loans (Details) - USD ($) $ in Thousands	Mar. 31, 2016	Dec. 31, 2015
Financing Receivable, Recorded Investment [Line Items]
Adversely classified loans to total loans	1.31%	1.33%
Gross loans	$ 1,866,346	$ 1,861,775
Commercial real estate
Financing Receivable, Recorded Investment [Line Items]
Gross loans	936,907	936,921
Commercial and industrial
Financing Receivable, Recorded Investment [Line Items]
Gross loans	456,436	458,553
Commercial construction
Financing Receivable, Recorded Investment [Line Items]
Gross loans	207,214	202,993
Residential
Financing Receivable, Recorded Investment [Line Items]
Gross loans	170,585	169,188
Home Equity
Financing Receivable, Recorded Investment [Line Items]
Gross loans	84,665	83,373
Consumer
Financing Receivable, Recorded Investment [Line Items]
Gross loans	10,539	10,747
Substandard
Financing Receivable, Recorded Investment [Line Items]
Gross loans	24,314	24,752
Substandard | Commercial real estate
Financing Receivable, Recorded Investment [Line Items]
Gross loans	11,586	12,487
Substandard | Commercial and industrial
Financing Receivable, Recorded Investment [Line Items]
Gross loans	9,100	8,670
Substandard | Commercial construction
Financing Receivable, Recorded Investment [Line Items]
Gross loans	1,734	1,776
Substandard | Residential
Financing Receivable, Recorded Investment [Line Items]
Gross loans	1,213	1,278
Substandard | Home Equity
Financing Receivable, Recorded Investment [Line Items]
Gross loans	644	503
Substandard | Consumer
Financing Receivable, Recorded Investment [Line Items]
Gross loans	37	38
Doubtful
Financing Receivable, Recorded Investment [Line Items]
Gross loans	53	11
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	42	0
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	11	11
Loss
Financing Receivable, Recorded Investment [Line Items]
Gross loans	3	8
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	3	3
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	5
Loss | Consumer
Financing Receivable, Recorded Investment [Line Items]
Gross loans	0	0
Not Adversely Classified
Financing Receivable, Recorded Investment [Line Items]
Gross loans	1,841,976	1,837,004
Not Adversely Classified | Commercial real estate
Financing Receivable, Recorded Investment [Line Items]
Gross loans	925,321	924,434
Not Adversely Classified | Commercial and industrial
Financing Receivable, Recorded Investment [Line Items]
Gross loans	447,291	449,880
Not Adversely Classified | Commercial construction
Financing Receivable, Recorded Investment [Line Items]
Gross loans	205,480	201,217
Not Adversely Classified | Residential
Financing Receivable, Recorded Investment [Line Items]
Gross loans	169,372	167,910
Not Adversely Classified | Home Equity
Financing Receivable, Recorded Investment [Line Items]
Gross loans	84,021	82,865
Not Adversely Classified | Consumer
Financing Receivable, Recorded Investment [Line Items]
Gross loans	$ 10,491	$ 10,698

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Allowance For Loan Loss - Past Due and Non-Accrual Loans (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2016	Dec. 31, 2015	Mar. 31, 2015
Schedule of Aging of Financing Receivables [Line Items]
Number of days a loan must be paid current before accrual of interest is resumed	180 days
Non-accrual loans	$ 11,264	$ 13,845
Total Past Due Loans	18,152	19,696
Current Loans	1,848,194	1,842,079
Gross loans	$ 1,866,346	$ 1,861,775
The ratio of non-accrual loans to total loans	0.60%	0.74%	1.07%
Additional funding commitments for loans on non-accrual	$ 0
Commercial real estate
Schedule of Aging of Financing Receivables [Line Items]
Non-accrual loans	6,188	$ 8,506
Total Past Due Loans	11,251	10,770
Current Loans	925,656	926,151
Gross loans	936,907	936,921
Commercial and industrial
Schedule of Aging of Financing Receivables [Line Items]
Non-accrual loans	4,106	4,323
Total Past Due Loans	5,177	6,232
Current Loans	451,259	452,321
Gross loans	456,436	458,553
Commercial construction
Schedule of Aging of Financing Receivables [Line Items]
Non-accrual loans	213	335
Total Past Due Loans	388	916
Current Loans	206,826	202,077
Gross loans	207,214	202,993
Residential
Schedule of Aging of Financing Receivables [Line Items]
Non-accrual loans	307	366
Total Past Due Loans	860	796
Current Loans	169,725	168,392
Gross loans	170,585	169,188
Home Equity
Schedule of Aging of Financing Receivables [Line Items]
Non-accrual loans	424	288
Total Past Due Loans	424	910
Current Loans	84,241	82,463
Gross loans	84,665	83,373
Consumer
Schedule of Aging of Financing Receivables [Line Items]
Non-accrual loans	26	27
Total Past Due Loans	52	72
Current Loans	10,487	10,675
Gross loans	10,539	10,747
Financing Receivables, 30 to 59 Days Past Due
Schedule of Aging of Financing Receivables [Line Items]
Gross loans	5,680	3,830
Financing Receivables, 30 to 59 Days Past Due | Commercial real estate
Schedule of Aging of Financing Receivables [Line Items]
Gross loans	4,665	1,124
Financing Receivables, 30 to 59 Days Past Due | Commercial and industrial
Schedule of Aging of Financing Receivables [Line Items]
Gross loans	833	1,218
Financing Receivables, 30 to 59 Days Past Due | Commercial construction
Schedule of Aging of Financing Receivables [Line Items]
Gross loans	175	581
Financing Receivables, 30 to 59 Days Past Due | Residential
Schedule of Aging of Financing Receivables [Line Items]
Gross loans	0	250
Financing Receivables, 30 to 59 Days Past Due | Home Equity
Schedule of Aging of Financing Receivables [Line Items]
Gross loans	0	622
Financing Receivables, 30 to 59 Days Past Due | Consumer
Schedule of Aging of Financing Receivables [Line Items]
Gross loans	7	35
Financing Receivables, 60 to 89 Days Past Due
Schedule of Aging of Financing Receivables [Line Items]
Gross loans	1,208	2,021
Financing Receivables, 60 to 89 Days Past Due | Commercial real estate
Schedule of Aging of Financing Receivables [Line Items]
Gross loans	398	1,140
Financing Receivables, 60 to 89 Days Past Due | Commercial and industrial
Schedule of Aging of Financing Receivables [Line Items]
Gross loans	238	691
Financing Receivables, 60 to 89 Days Past Due | Commercial construction
Schedule of Aging of Financing Receivables [Line Items]
Gross loans	0	0
Financing Receivables, 60 to 89 Days Past Due | Residential
Schedule of Aging of Financing Receivables [Line Items]
Gross loans	553	180
Financing Receivables, 60 to 89 Days Past Due | Home Equity
Schedule of Aging of Financing Receivables [Line Items]
Gross loans	0	0
Financing Receivables, 60 to 89 Days Past Due | Consumer
Schedule of Aging of Financing Receivables [Line Items]
Gross loans	19	10
Not Adversely Classified
Schedule of Aging of Financing Receivables [Line Items]
Gross loans	1,841,976	1,837,004
Non-accrual loans not adversely classified	337	402
Not Adversely Classified | Commercial real estate
Schedule of Aging of Financing Receivables [Line Items]
Gross loans	925,321	924,434
Not Adversely Classified | Commercial and industrial
Schedule of Aging of Financing Receivables [Line Items]
Gross loans	447,291	449,880
Not Adversely Classified | Commercial construction
Schedule of Aging of Financing Receivables [Line Items]
Gross loans	205,480	201,217
Not Adversely Classified | Residential
Schedule of Aging of Financing Receivables [Line Items]
Gross loans	169,372	167,910
Not Adversely Classified | Home Equity
Schedule of Aging of Financing Receivables [Line Items]
Gross loans	84,021	82,865
Not Adversely Classified | Consumer
Schedule of Aging of Financing Receivables [Line Items]
Gross loans	$ 10,491	$ 10,698

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Allowance For Loan Loss - Impaired Loans (Details) $ in Thousands	3 Months Ended
	Mar. 31, 2016 USD ($) relationship	Mar. 31, 2015 USD ($)	Dec. 31, 2015 USD ($)
Financing Receivable, Impaired [Line Items]
Total recorded investment in impaired loans	$ 21,405		$ 23,688
Total accruing impaired loans	10,300		10,100
Impaired non-accrual loans	11,100		13,600
Unpaid contractual principal balance	25,634		28,652
Recorded investment with no allowance	15,948		19,100
Recorded investment with allowance	5,457		4,588
Related allowance	2,108	$ 2,700	1,792
Average recorded investment	21,643	30,046
Interest income recognized	104	106
Additional funding commitments on impaired loans	$ 469
Commercial
Financing Receivable, Impaired [Line Items]
Larger commercial relationships downgraded in the period | relationship	3
Commercial real estate
Financing Receivable, Impaired [Line Items]
Total recorded investment in impaired loans	$ 9,926		12,287
Unpaid contractual principal balance	11,810		14,903
Recorded investment with no allowance	9,165		11,734
Recorded investment with allowance	761		553
Related allowance	179		186
Average recorded investment	9,668	15,479
Interest income recognized	43	45
Commercial and industrial
Financing Receivable, Impaired [Line Items]
Total recorded investment in impaired loans	$ 7,853		7,810
Larger C&I Relationship Downgraded in Period Requiring Additional Specific Reserves | relationship	1
Unpaid contractual principal balance	$ 9,932		9,816
Recorded investment with no allowance	4,615		5,253
Recorded investment with allowance	3,238		2,557
Related allowance	1,420		1,078
Average recorded investment	8,424	11,256
Interest income recognized	26	34
Commercial construction
Financing Receivable, Impaired [Line Items]
Total recorded investment in impaired loans	2,989		3,032
Unpaid contractual principal balance	3,024		3,147
Recorded investment with no allowance	1,552		1,583
Recorded investment with allowance	1,437		1,449
Related allowance	488		499
Average recorded investment	2,975	2,624
Interest income recognized	37	26
Residential
Financing Receivable, Impaired [Line Items]
Total recorded investment in impaired loans	307		366
Unpaid contractual principal balance	395		453
Recorded investment with no allowance	307		366
Recorded investment with allowance	0		0
Related allowance	0		0
Average recorded investment	308	459
Interest income recognized	0	0
Home Equity
Financing Receivable, Impaired [Line Items]
Total recorded investment in impaired loans	309		169
Unpaid contractual principal balance	450		308
Recorded investment with no allowance	309		164
Recorded investment with allowance	0		5
Related allowance	0		5
Average recorded investment	246	179
Interest income recognized	(2)	1
Consumer
Financing Receivable, Impaired [Line Items]
Total recorded investment in impaired loans	21		24
Unpaid contractual principal balance	23		25
Recorded investment with no allowance	0		0
Recorded investment with allowance	21		24
Related allowance	21		$ 24
Average recorded investment	22	49
Interest income recognized	$ 0	$ 0

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Allowance For Loan Loss - Troubled Debt Restructures (Details)	3 Months Ended
	Mar. 31, 2016 USD ($) restructuring	Mar. 31, 2015 USD ($) restructuring	Dec. 31, 2015 USD ($)
Financing Receivable, Modifications [Line Items]
Total Troubled Debt Restructure (TDR) loans	$ 15,600,000		$ 17,100,000
TDR loans on accrual status	10,300,000		10,100,000
TDR loans included in non-performing loans	5,300,000		$ 7,100,000
Additional Funding Commitments on TDR loans	$ 469,000
Number of restructurings | restructuring	1	4
Pre-modification outstanding recorded investment	$ 264,000	$ 869,000
Post-modification outstanding recorded investment	$ 264,000	$ 869,000
Number of TDRs that defaulted | restructuring	0	0
Charge-offs associated with TDRs	$ 0	$ 0
Specific reserves allocated to TDRs	$ 0	61,000
Interest payments received on nonaccruing TDR loans excluded from income		$ 1,000
Commercial real estate
Financing Receivable, Modifications [Line Items]
Number of restructurings | restructuring	0	0
Pre-modification outstanding recorded investment	$ 0	$ 0
Post-modification outstanding recorded investment	$ 0	$ 0
Commercial and industrial
Financing Receivable, Modifications [Line Items]
Number of restructurings | restructuring	1	4
Pre-modification outstanding recorded investment	$ 264,000	$ 869,000
Post-modification outstanding recorded investment	$ 264,000	$ 869,000
Commercial construction
Financing Receivable, Modifications [Line Items]
Number of restructurings | restructuring	0	0
Pre-modification outstanding recorded investment	$ 0	$ 0
Post-modification outstanding recorded investment	$ 0	$ 0
Residential
Financing Receivable, Modifications [Line Items]
Number of restructurings | restructuring	0	0
Pre-modification outstanding recorded investment	$ 0	$ 0
Post-modification outstanding recorded investment	$ 0	$ 0
Home Equity
Financing Receivable, Modifications [Line Items]
Number of restructurings | restructuring	0	0
Pre-modification outstanding recorded investment	$ 0	$ 0
Post-modification outstanding recorded investment	$ 0	$ 0
Consumer
Financing Receivable, Modifications [Line Items]
Number of restructurings | restructuring	0	0
Pre-modification outstanding recorded investment	$ 0	$ 0
Post-modification outstanding recorded investment	$ 0	$ 0

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Allowance For Loan Loss - Other Real Estate Owned (Details)	3 Months Ended
	Mar. 31, 2016 USD ($) property	Mar. 31, 2015 USD ($)	Dec. 31, 2015 USD ($)
Accounts, Notes, Loans and Financing Receivable [Line Items]
Carry value of OREO	$ 0		$ 0
Net gains on sales of OREO	$ 0	$ 154,000
Other real estate owned
Accounts, Notes, Loans and Financing Receivable [Line Items]
Number of OREO properties added | property	0
OREO fair value adjustment	$ 0	$ 0

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Allowance For Loan Loss - Allowance for Loan Losses (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015	Dec. 31, 2015
Financing Receivable, Allowance for Credit Losses [Line Items]
Increase (Decrease) in Loans	$ 4,700	$ 9,500
The ratio of non-accrual loans to total loans	0.60%	1.07%	0.74%
Allowance for loan losses on impaired loans	$ 2,108	$ 2,700	$ 1,792
Allowance for loan losses on non-impaired classified loans	2,200	1,600
Net charge-offs (recoveries)	$ (52)	$ (57)
Allowance for loan losses to total loans ratio	1.60%	1.65%	1.56%
Allowance for Loan and Lease Losses [Roll Forward]
Beginning Balance	$ 29,008	$ 27,121
Provision for loan losses	850	625
Recoveries	150	110
Less: Charge offs	98	53
Ending Balance	29,910	27,803
Allotted to loans individually evaluated for impairment	2,108	2,715
Allotted to loans collectively evaluated for impairment	27,802	25,088
Commercial real estate
Financing Receivable, Allowance for Credit Losses [Line Items]
Allowance for loan losses on impaired loans	179		$ 186
Allowance for Loan and Lease Losses [Roll Forward]
Beginning Balance	13,514	12,664
Provision for loan losses	294	78
Recoveries	19	5
Less: Charge offs	0	0
Ending Balance	13,827	12,747
Allotted to loans individually evaluated for impairment	179	165
Allotted to loans collectively evaluated for impairment	13,648	12,582
Commercial and industrial
Financing Receivable, Allowance for Credit Losses [Line Items]
Allowance for loan losses on impaired loans	1,420		1,078
Allowance for Loan and Lease Losses [Roll Forward]
Beginning Balance	9,758	9,245
Provision for loan losses	463	530
Recoveries	129	84
Less: Charge offs	72	17
Ending Balance	10,278	9,842
Allotted to loans individually evaluated for impairment	1,420	1,951
Allotted to loans collectively evaluated for impairment	8,858	7,891
Commercial construction
Financing Receivable, Allowance for Credit Losses [Line Items]
Allowance for loan losses on impaired loans	488		499
Allowance for Loan and Lease Losses [Roll Forward]
Beginning Balance	3,905	3,384
Provision for loan losses	64	11
Recoveries	0	13
Less: Charge offs	5	0
Ending Balance	3,964	3,408
Allotted to loans individually evaluated for impairment	488	528
Allotted to loans collectively evaluated for impairment	3,476	2,880
Residential
Financing Receivable, Allowance for Credit Losses [Line Items]
Allowance for loan losses on impaired loans	0		0
Allowance for Loan and Lease Losses [Roll Forward]
Beginning Balance	1,061	989
Provision for loan losses	16	(29)
Recoveries	0	0
Less: Charge offs	0	0
Ending Balance	1,077	960
Allotted to loans individually evaluated for impairment	0	0
Allotted to loans collectively evaluated for impairment	1,077	960
Home Equity
Financing Receivable, Allowance for Credit Losses [Line Items]
Allowance for loan losses on impaired loans	0		5
Allowance for Loan and Lease Losses [Roll Forward]
Beginning Balance	540	608
Provision for loan losses	6	7
Recoveries	0	0
Less: Charge offs	5	0
Ending Balance	541	615
Allotted to loans individually evaluated for impairment	0	22
Allotted to loans collectively evaluated for impairment	541	593
Consumer
Financing Receivable, Allowance for Credit Losses [Line Items]
Allowance for loan losses on impaired loans	21		$ 24
Allowance for Loan and Lease Losses [Roll Forward]
Beginning Balance	230	231
Provision for loan losses	7	28
Recoveries	2	8
Less: Charge offs	16	36
Ending Balance	223	231
Allotted to loans individually evaluated for impairment	21	49
Allotted to loans collectively evaluated for impairment	$ 202	$ 182

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Deposits (Details) - USD ($) $ in Thousands		Mar. 31, 2016	Dec. 31, 2015
Deposits [Abstract]
Noninterest-bearing demand deposits		$ 599,282	$ 570,589
Interest bearing checking		313,314	313,674
Savings		179,127	167,304
Money markets		735,492	692,114
Certificates of deposit, $250,000 or Less,		127,925	129,993
Certificates of deposit more than $250,000		43,309	37,704
Total non-brokered deposits	[1]	1,998,449	1,911,378
Brokered deposits	[2]	89,288	106,770
Deposits		$ 2,087,737	$ 2,018,148

[1] Includes reciprocal money market deposits and CDs received from participating banks in nationwide networks as a result of our customers electing to participate in programs to obtain full FDIC insurance. Essentially, the equivalent of the original deposit comes back to the Company as non-brokered deposits within the appropriate category under total deposits on the balance sheet.

[2] Primarily brokered CDs $250,000 and under.

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Borrowed Funds and Subordinated Debt (Details) - USD ($)	1 Months Ended		3 Months Ended
	Jan. 31, 2015	Mar. 31, 2000	Mar. 31, 2016	Dec. 31, 2015
Debt Instrument [Line Items]
Borrowed Funds			$ 671,000	$ 53,671,000
Advances from Federal Home Loan Banks				40,700,000
Other Borrowings				13,000,000
Subordinated debt			$ 14,825,000	$ 14,822,000
Proceeds from capital contributions		$ 325,000
Junior subordinated debt, amount		$ 10,800,000
Fixed-to Floating Rate Subordinated Notes
Debt Instrument [Line Items]
Subordinated debt	$ 15,000,000
Subordinated debt, rate			6.00%
Original debt issuance costs	$ 190,000
Junior Subordinated Debt
Debt Instrument [Line Items]
Subordinated debt, rate		10.88%
Enterprise (MA) Capital Trust 1
Debt Instrument [Line Items]
Trust preferred securities, value		$ 10,500,000
Trust preferred securities, stated interest rate		10.88%
London Interbank Offered Rate (LIBOR) | Fixed-to Floating Rate Subordinated Notes
Debt Instrument [Line Items]
Fixed to Floating Rate Conversion Date			Jan. 31, 2025
Spread over LIBOR fixed-to floating rate note, rate			3.90%

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Derivatives and Hedging Activities (Details) - Interest rate swap	3 Months Ended
	Mar. 31, 2016 USD ($) instrument	Dec. 31, 2015 USD ($) instrument
Derivative [Line Items]
Number of Interest Rate Swaps | instrument	2	2
Aggregate notional value of interest-rate swaps	$ 10,100,000
Fair Value of Interest-Rate Swap Assets	225,000	$ 16,000
Fair Value of Interest-Rate Swap Liability	225,000	16,000
Gain (Loss) on Interest Rate Swaps	0
Gross Amount Interest Rate Swap Asset Recognized	225,000	16,000
Net Asset Amount, Interest Rate Swap	225,000	16,000
Gross Amount Interest Rate Swap Liability Recognized	225,000	16,000
Collateral posted	240,000	0
Net Liability Amount, Interest Rate Swap	$ (15,000)	$ 16,000

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Supplemental Retirement Plan and Other Postretirement Benefit Obligations (Details) $ in Thousands	3 Months Ended
	Mar. 31, 2016 USD ($) officer	Mar. 31, 2015 USD ($)
Supplemental Employee Retirement Plan
Defined Benefit Plan Disclosures [Line Items]
Number of Active Executive Officers under Plan | officer	2
Number of Former Executive Officers under Plan | officer	1
Term of SERP benefits	20 years
Net Periodic Benefit Cost, Interest Only	$ 31	$ 31
Benefits Paid	69	69
Remaining accrual for benefit obligation in current year	93
Supplemental Life Insurance
Defined Benefit Plan Disclosures [Line Items]
Net Periodic Benefit Cost, Interest Only	$ 19	$ 18

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Stock-Based Compensation Summary Information for Options Granted (Details) - $ / shares	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock option awards granted	30,613	27,115
Stock options
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Term in years	10 years	10 years
Expected volatility	42.00%	47.00%
Market price on date of grant	$ 21.86	$ 21.03
Per share weighted average fair value	$ 7.90	$ 8.51
Weighted Average | Stock options
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Expected dividend yield	3.03%	2.89%
Expected life in years	7 years	7 years
Risk-free interest rate	1.91%	1.95%
Fair Value as a percentage of market value at grant date	36.00%	40.00%

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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		12 Months Ended
	Jan. 31, 2016 shares	Mar. 31, 2016 USD ($) plans shares	Mar. 31, 2015 USD ($)	Dec. 31, 2015 USD ($)	May. 31, 2016 shares	Jan. 02, 2015 $ / shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of Individual Stock Incentive Plans | plans		3
Stock-based compensation expense		$ 443	$ 488
Number of shares issued in lieu of cash to directors | shares	10,657
Fair market share price | $ / shares						$ 23.86
Stock options
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock-based compensation expense		$ 79	97
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		$ 294	309
Common stock in lieu of cash | Director
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock-based compensation expense		$ 70	$ 82	$ 254
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%
2009 plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares remaining available for future grants | shares		107,992
Subsequent Event | 2016 plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares remaining available for future grants | shares					350,000

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Stock-Based Compensation Restricted Stock Grants (Details) - Restricted stock - $ / shares	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock awards in period	61,584	54,719
Weighted Average Grant Date Fair Value, Stock Awards	$ 21.86	$ 21.03
Director | Two year vesting
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock awards in period	9,060	7,276
Employee | Four year vesting
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock awards in period	17,453	17,181
Employee | Performance-based vesting
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock awards in period	35,071	30,262

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Earnings Per Share Earnings Per Share (Details) - shares	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015
Earnings Per Share [Abstract]
Basic weighted average common shares outstanding	10,405,112	10,243,044
Dilutive shares	66,672	67,430
Diluted weighted average common shares outstanding	10,471,784	10,310,474

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Fair Value Measurements - Recurring and Nonrecurring Basis (Details)	3 Months Ended
	Mar. 31, 2016 USD ($) property	Mar. 31, 2015 USD ($)	Dec. 31, 2015 USD ($)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Specific allowance for collateral dependent impaired loans	$ 1,200,000		$ 1,400,000
Carry value of OREO	0		0
Net gains on sales of OREO	$ 0	$ 154,000
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
Other real estate owned
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Number of OREO properties added | property	0
OREO fair value adjustment	$ 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 liabilities	0		0
Fair Value, Measurements, Recurring | Fair Value, Inputs, Level 1 | Fixed income 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 securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair value of assets	12,446,000		11,657,000
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	225,000		16,000
Fair Value, Measurements, Recurring | Fair Value, Inputs, Level 2 | Fixed income securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair value of assets	292,500,000		288,701,000
Fair Value, Measurements, Recurring | Fair Value, Inputs, Level 2 | Equity 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 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	225,000		16,000
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 | Fixed income 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 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 | FHLB Stock
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair value of assets	2,793,000		3,050,000
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	3,088,000		2,516,000
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	225,000		16,000
Fair Value | Fair Value, Measurements, Recurring | Fixed income securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair value of assets	292,500,000		288,701,000
Fair Value | Fair Value, Measurements, Recurring | Equity securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair value of assets	12,446,000		11,657,000
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	2,793,000		3,050,000
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	225,000		16,000
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	$ 3,088,000		$ 2,516,000

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Fair Value Measurements - Quantitative (Details) - Fair Value, Inputs, Level 3 - USD ($) $ in Thousands		3 Months Ended
		Mar. 31, 2016	Dec. 31, 2015
Fair Value, Measurements, Recurring | FHLB Stock
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Fair value of assets		$ 2,793	$ 3,050
Fair Value, Measurements, Recurring | FHLB Stock | FHLB par stated value
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Fair value of assets		2,793
Fair Value, Measurements, Nonrecurring
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Impaired loans (collateral dependent), Fair Value		3,088	$ 2,516
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]	$ 3,088
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.

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Fair Value Measurements - Balance Sheet Grouping (Details) - USD ($) $ in Thousands	Mar. 31, 2016	Dec. 31, 2015
Carrying Amount
Financial assets:
Loans held for sale	$ 770	$ 1,709
Loans, net	1,834,782	1,830,954
Financial liabilities:
Borrowed Funds	671	53,671
Subordinated debt	14,825	14,822
Carrying Amount | Certificates of Deposit
Financial liabilities:
Certificates of deposit	260,522	274,467
Fair Value
Financial assets:
Loans held for sale	771	1,709
Loans, net	1,850,258	1,845,009
Financial liabilities:
Borrowed Funds	671	53,670
Subordinated debt	14,758	13,961
Fair Value | Certificates of Deposit
Financial liabilities:
Certificates of deposit	260,636	273,419
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	771	1,709
Loans, net	0	0
Financial liabilities:
Borrowed Funds	671	53,670
Subordinated debt	0	0
Fair Value, Inputs, Level 2 | Certificates of Deposit
Financial liabilities:
Certificates of deposit	260,636	273,419
Fair Value, Inputs, Level 3
Financial assets:
Loans held for sale	0	0
Loans, net	1,850,258	1,845,009
Financial liabilities:
Borrowed Funds	0	0
Subordinated debt	14,758	13,961
Fair Value, Inputs, Level 3 | Certificates of Deposit
Financial liabilities:
Certificates of deposit	$ 0	$ 0