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 June 30, 2013

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 August 5, 2013, there were 9,943,786 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 – June 30, 2013 and December 31, 2012	3
	Consolidated Statements of Income -Three and six months ended June 30, 2013 and 2012	4
	Consolidated Statements of Comprehensive Income -Three and six months ended June 30, 2013 and 2012	5
	Consolidated Statement of Changes in Stockholders’ Equity - Six months ended June 30, 2013	6
	Consolidated Statements of Cash Flows - Six months ended June 30, 2013 and 2012	7
	Notes to Unaudited Consolidated Financial Statements	8
Item 2	Management’s Discussion and Analysis of Financial Condition and Results of Operations	34
Item 3	Quantitative and Qualitative Disclosures About Market Risk	59
Item 4	Controls and Procedures	60
	PART II - OTHER INFORMATION
Item 1	Legal Proceedings	61
Item 1A	Risk Factors	61
Item 2	Unregistered Sales of Equity Securities and Use of Proceeds	61
Item 3	Defaults Upon Senior Securities	61
Item 4	Mine Safety Disclosures	61
Item 5	Other Information	61
Item 6	Exhibits	62
	Signature page	63

2

PART I-FINANCIAL INFORMATION

Item 1 - Financial Statements

ENTERPRISE BANCORP, INC.

Consolidated Balance Sheets

(Dollars in thousands)	June 30, 2013		December 31, 2012
	(unaudited)
Assets
Cash and cash equivalents:
Cash and due from banks	$	40,795	$	38,007
Interest-earning deposits	6,878		12,218
Fed funds sold	4,055		2,510
Total cash and cash equivalents	51,728		52,735
Investment securities at fair value	190,459		184,464
Federal Home Loan Bank Stock	4,324		4,260
Loans held for sale	3,917		8,557
Loans, less allowance for loan losses of $25,671 at June 30, 2013 and $24,254 at December 31, 2012, respectively	1,421,675		1,335,401
Premises and equipment	28,602		27,206
Accrued interest receivable	6,092		5,828
Deferred income taxes, net	13,771		12,548
Bank-owned life insurance	15,678		15,443
Prepaid income taxes	1,387		174
Prepaid expenses and other assets	10,047		13,454
Goodwill	5,656		5,656
Total assets	$	1,753,336	$	1,665,726
Liabilities and Stockholders’ Equity
Liabilities
Deposits	$	1,579,293	$	1,475,027
Borrowed funds	1,880		26,540
Junior subordinated debentures	10,825		10,825
Accrued expenses and other liabilities	16,766		13,182
Accrued interest payable	579		603
Total liabilities	$	1,609,343	$	1,526,177
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; 9,872,735 issued and outstanding at June 30, 2013 (including 171,481 shares of unvested participating restricted awards) and 9,676,477 shares issued and outstanding at December 31, 2012 (including 154,186 shares of unvested participating restricted awards)	99		97
Additional paid-in-capital	50,479		48,194
Retained earnings	91,427		87,159
Accumulated other comprehensive income	1,988		4,099
Total stockholders’ equity	$	143,993	$	139,549
Total liabilities and stockholders’ equity	$	1,753,336	$	1,665,726

See the accompanying notes to the unaudited consolidated financial statements.

3

ENTERPRISE BANCORP, INC.

Consolidated Statements of Income

(unaudited)

	Three months ended June 30,				Six months ended June 30,
(Dollars in thousands, except per share data)	2013		2012		2013		2012
Interest and dividend income:
Loans and loans held for sale	$	16,653	$	16,228	$	33,026	$	32,186
Investment securities	794		835		1,604		1,634
Other interest-earning assets	11		24		21		43
Total interest and dividend income	17,458		17,087		34,651		33,863
Interest expense:
Deposits	996		1,368		2,030		2,905
Borrowed funds	40		13		86		29
Junior subordinated debentures	295		295		589		589
Total interest expense	1,331		1,676		2,705		3,523
Net interest income	16,127		15,411		31,946		30,340
Provision for loan losses	534		1,050		1,317		1,350
Net interest income after provision for loan losses	15,593		14,361		30,629		28,990
Non-interest income:
Investment advisory fees	1,045		934		2,061		1,955
Deposit and interchange fees	1,181		1,107		2,289		2,128
Income on bank-owned life insurance, net	119		128		235		262
Net gains on sales of investment securities	468		112		948		159
Gains on sales of loans	222		218		557		458
Other income	518		453		1,102		964
Total non-interest income	3,553		2,952		7,192		5,926
Non-interest expense:
Salaries and employee benefits	8,651		7,841		16,699		15,344
Occupancy and equipment expenses	1,488		1,430		3,059		2,844
Technology and telecommunications expenses	1,203		1,077		2,356		2,076
Advertising and public relations expenses	946		497		1,566		1,286
Audit, legal and other professional fees	411		487		825		970
Deposit insurance premiums	284		283		533		560
Supplies and postage expenses	250		196		487		427
Investment advisory and custodial expenses	134		112		260		209
Other operating expenses	1,094		1,049		2,130		2,074
Total non-interest expense	14,461		12,972		27,915		25,790
Income before income taxes	4,685		4,341		9,906		9,126
Provision for income taxes	1,606		1,436		3,394		3,048
Net income	$	3,079	$	2,905	$	6,512	$	6,078
Basic earnings per share	$	0.31	$	0.30	$	0.67	$	0.64
Diluted earnings per share	$	0.31	$	0.30	$	0.66	$	0.63
Basic weighted average common shares outstanding	9,825,335		9,588,420		9,770,559		9,543,994
Diluted weighted average common shares outstanding	9,889,639		9,655,728		9,840,016		9,612,187

See the accompanying notes to the unaudited consolidated financial statements.

4

ENTERPRISE BANCORP, INC.

Consolidated Statements of Comprehensive Income

(Unaudited)

	Three months ended June 30,						Six months ended June 30,
(Dollars in thousands)	2013			2012			2013			2012
Net income	$	3,079		$	2,905		$	6,512		$	6,078
Other comprehensive (loss) income, net of taxes:
Gross unrealized holding (losses) gains on investments arising during the period	(2,744		)	312			(2,386		)	816
Income tax benefit (expense)	999			(117		)	884			(287		)
Net unrealized holding (losses) gains, net of tax	(1,745		)	195			(1,502		)	529
Less: Reclassification adjustment for net gains included in net income
Net realized gains on sales of securities during the period	468			112			948			159
Income tax expense	(163		)	(40		)	(339		)	(56		)
Reclassification adjustment for gains realized, net of tax	305			72			609			103
Total other comprehensive (loss) income	(2,050		)	123			(2,111		)	426
Comprehensive income	$	1,029		$	3,028		$	4,401		$	6,504

See the accompanying notes to the unaudited consolidated financial statements.

5

ENTERPRISE BANCORP, INC.

Consolidated Statement of Changes in Stockholders’ Equity

(Unaudited)

(Dollars in thousands)	Common Stock		Additional Paid-in Capital		Retained Earnings			Accumulated Other Comprehensive Income			Total Stockholders’ Equity
Balance at December 31, 2012	$	97	$	48,194	$	87,159		$	4,099		$	139,549
Net income					6,512						6,512
Other comprehensive loss, net								(2,111		)	(2,111		)
Tax benefit from exercise of stock options			7								7
Common stock dividend paid ($0.23 per share)					(2,244		)				(2,244		)
Common stock issued under dividend reinvestment plan	—		630								630
Stock-based compensation	1		933								934
Stock options exercised, net	1		715								716
Balance at June 30, 2013	$	99	$	50,479	$	91,427		$	1,988		$	143,993

See the accompanying notes to the unaudited consolidated financial statements.

6

ENTERPRISE BANCORP, INC.

Consolidated Statements of Cash Flows

(Unaudited)

	Six months ended June 30,
(Dollars in thousands)	2013			2012
Cash flows from operating activities:
Net income	$	6,512		$	6,078
Adjustments to reconcile net income to net cash provided by operating activities:
Provision for loan losses	1,317			1,350
Depreciation and amortization	2,458			2,133
Stock-based compensation expense	859			652
Mortgage loans originated for sale	(25,274		)	(21,388		)
Proceeds from mortgage loans sold	30,471			24,644
Net gains on sales of loans	(557		)	(458		)
Net gains on sales of OREO	(121		)	(45		)
Net gains on sales of investments	(948		)	(159		)
Income on bank-owned life insurance, net	(235		)	(262		)
Changes in:
Accrued interest receivable	(264		)	191
Prepaid expenses and other assets	1,802			683
Accrued expenses and other liabilities	(1,319		)	1,391
Accrued interest payable	(24		)	(169		)
Net cash provided by operating activities	14,677			14,641
Cash flows from investing activities:
Proceeds from sales of investment securities available for sale	7,361			2,921
Net proceeds (purchase) from FHLB capital stock	(64		)	480
Proceeds from maturities, calls and pay-downs of investment securities	8,040			9,689
Purchase of investment securities	(19,297		)	(36,874		)
Net increase in loans	(87,759		)	(46,522		)
Additions to premises and equipment, net	(3,332		)	(962		)
Proceeds from OREO sales and payments	652			885
Net cash used in investing activities	(94,399		)	(70,383		)
Cash flows from financing activities:
Net increase in deposits	104,266			120,454
Net decrease in borrowed funds	(24,660		)	(1,625		)
Cash dividends paid	(2,244		)	(2,098		)
Proceeds from issuance of common stock	630			635
Proceeds from the exercise of stock options	716			100
Tax benefit from the exercise of stock options	7			1
Net cash provided by financing activities	78,715			117,467
Net (decrease) increase in cash and cash equivalents	(1,007		)	61,725
Cash and cash equivalents at beginning of period	52,735			39,131
Cash and cash equivalents at end of period	$	51,728		$	100,856
Supplemental financial data:
Cash Paid For: Interest	$	2,729		$	3,692
Cash Paid For: Income Taxes	4,583			4,134
Supplemental schedule of non-cash investing activity:
Purchase of investment securities not yet settled	4,978			—
Transfer from loans to other real estate owned	167			400
Capital expenditures incurred not yet paid	—			74

See accompanying notes to the unaudited consolidated financial statements.

7

ENTERPRISE BANCORP, INC.

Notes to the Unaudited Consolidated Financial Statements

(1) Organization of Holding Company and Basis of Presentation

The accompanying unaudited consolidated financial statements and these notes should be read in conjunction with the December 31, 2012 audited consolidated financial statements and notes thereto contained in the 2012 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, 2013.  The Company has not changed its reporting policies from those disclosed in its 2012 Annual Report on Form 10-K.

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 year amounts in the unaudited consolidated interim financial statements and accompanying footnotes 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.

The Company's consolidated unaudited 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.

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, which hold various types of qualifying securities.  The security corporations are limited to conducting securities investment activities that the Bank itself would be allowed to conduct under applicable laws.

Pursuant to the Accounting Standards Codification (“ASC”) Topic 810 “Consolidation of Variable Interest Entities,” issued by the Financial Accounting Standards Board (originally issued as Financial Interpretation No. 46R) in December 2003, the Company carries 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, are excluded from the Company’s consolidated financial statements.

Comprehensive income is defined as all changes to 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. Pursuant to Accounting Standards Update (“ASU”) No. 2013-02, Comprehensive Income (Topic 220): Reporting Amounts Reclassified Out of Accumulated 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."

The Company has 21 full service branches serving the Merrimack Valley and North Central regions of Massachusetts and Southern New Hampshire. The Company is currently constructing a branch office in Nashua, NH with an anticipated opening in the fourth quarter of 2013. Through the Bank and its subsidiaries, the Company offers a range of commercial and consumer loan products, deposit and cash management products, investment advisory and wealth management, and insurance services.  The services offered through the Bank and subsidiaries are managed as one strategic unit and represent the Company’s only reportable operating segment.

8

ENTERPRISE BANCORP, INC.

Notes to the Unaudited Consolidated Financial Statements (continued)

The Federal Deposit Insurance Corporation (the “FDIC”) and the Massachusetts Commissioner of Banks (the “Commissioner”) 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 Commissioner also retains supervisory jurisdiction over the Company.

(2) Critical Accounting Estimates

As discussed in the Company’s 2012 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 2012 Annual Report on Form 10-K for significant accounting policies. The Company has not changed its significant accounting policies from those disclosed in its 2012 Annual Report filed on Form 10-K.

In preparing the consolidated 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 estimates and assumptions 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.

(3) Recent Accounting Pronouncements

In February 2013, the Financial Accounting Standards Board (“FASB”) issued ASU No. 2013-02, Comprehensive Income (Topic 220): Reporting Amounts Reclassified out of Accumulated Other Comprehensive Income.  The new amendments require an organization to present the effects on the income statement of significant amounts reclassified out of accumulated other comprehensive income or cross-reference to other disclosures currently required under GAAP for certain items. The new amended standard is effective for annual periods beginning after December 15, 2012, and interim periods within those annual periods.  As this ASU addresses only disclosure requirements, the adoption in the first quarter of 2013 did not have a material impact on the Company's financial statements. See Note 1, "Organization of Holding Company and Basis of Presentation," for the disclosure of the effects of amounts reclassified out of accumulated other comprehensive income.

In December 2011, the FASB issued ASU No. 2011-11, Balance Sheet (Topic 210): Disclosures about Offsetting Assets and Liabilities, which was subsequently clarified in January 2013 by ASU 2013-01.  The new amended standard was effective for annual periods beginning January 1, 2013, and interim periods within those annual periods.  As this ASU primarily deals with disclosure requirements and the Company has no netting arrangements, the adoption in January 2013 did not have an impact on the Company's financial statements.

9

ENTERPRISE BANCORP, INC.

Notes to the Unaudited Consolidated Financial Statements (continued)

(4) Investments

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

	June 30, 2013
(Dollars in thousands)	Amortized cost		Unrealized gains		Unrealized losses		Fair Value
Federal agency obligations (1)	$	65,111	$	191	$	50	$	65,252
Federal agency mortgage backed securities (MBS) (1)	52,563		570		976		52,157
Municipal securities	56,222		1,847		391		57,678
Corporate bonds	3,786		4		54		3,736
Certificates of deposit	858		—		3		855
Total fixed income securities	178,540		2,612		1,474		179,678
Equity investments	8,886		2,020		125		10,781
Total available for sale securities, at fair value	$	187,426	$	4,632	$	1,599	$	190,459

	December 31, 2012
(Dollars in thousands)	Amortized cost		Unrealized gains		Unrealized losses		Fair Value
Federal agency obligations(1)	$	65,247	$	438	$	—	$	65,685
Federal agency mortgage backed securities (MBS) (1)	48,429		1,287		42		49,674
Municipal securities	53,437		3,103		17		56,523
Corporate bonds	1,905		15		6		1,914
Total fixed income securities	169,018		4,843		65		173,796
Equity investments	9,080		1,622		34		10,668
Total available for sale securities, at fair value	$	178,098	$	6,465	$	99	$	184,464

__________________________________________

(1) These categories may include investments issued or guaranteed by government sponsored enterprises such as Fannie Mae (FNMA), Freddie Mac (FHLMC), Ginnie Mae (GNMA), Federal Farm Credit Bank, or one of several Federal Home Loan Banks.  All agency MBS/Collateralized Mortgage Obligations ("CMOs") investments owned by the Company are backed by residential mortgages.

Included in the carrying amount of the federal agency MBS category were CMOs totaling $20.6 million and $23.6 million at June 30, 2013 and December 31, 2012, respectively.

Certificates of Deposit (CDs) represent term deposits issued by banks that are subject to FDIC insurance and purchased on the open market. The Company utilizes these CDs as an alternative investment option to holding short-term excess cash in lower yielding overnight deposit accounts. These securities have maturities of less than a year and the market value approximates the carrying value.

At June 30, 2013, the equity portfolio consisted primarily of investments in a diversified group of mutual funds, with a small portion of the portfolio (approximately 17%) invested in exchange traded funds or individual common stock of entities in the financial services industry.

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

10

ENTERPRISE BANCORP, INC.

Notes to the Unaudited Consolidated Financial Statements (continued)

income if the securities are sold. However, if an unrealized loss on the fixed income portfolio is deemed to be other than temporary, the credit loss portion is charged to earnings and the noncredit portion is recognized in accumulated other comprehensive income. 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 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 six months ended June 30, 2013 and 2012, the Company did not record any fair value impairment charges on its investments. As of June 30, 2013, there were a total of 64 investments (fixed income and equity, excluding CDs), with a fair market value of $71.6 million, in an unrealized loss position totaling $1.6 million. The Company attributes these unrealized losses to increases in current market yields since the date the underlying securities were purchased and does not consider these investments to be other-than-temporarily impaired at June 30, 2013, because 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 because 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 MBS investments and Federal Agency obligations, the contractual cash flows of these investments are guaranteed by an agency of the U.S. Government, and the agency that issued these securities is sponsored by the U.S. Government. 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 investment's materiality, and duration of the 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. At June 30, 2013 the Company's corporate and municipal bond portfolios did not contain any securities below investment grade, as reported by major credit rating agencies. For equities and funds, management's assessment includes the severity of the declines, whether it is unlikely that the security or fund will completely recover its unrealized loss within a reasonable time period and if the equity security or fund exhibits fundamental deterioration.

The small portion of the portfolio invested in short-term CDs was also in an unrealized loss position at June 30, 2013 due to market rates. The unrealized loss was not considered to be material and the securities are expected to be settled at par value at maturity.

The contractual maturity distribution at June 30, 2013 of total fixed income investments, excluding CDs which mature in less than one year, is 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	$	15,502	0.76	%	$	49,609	0.92	%	$	—	—	%	$	—	—	%
MBS	—		—	%	49		1.54	%	11,150		3.00	%	41,364		1.80	%
Municipal securities	2,226		2.53	%	15,250		2.83	%	31,841		4.32	%	6,905		6.78	%
Corporate bonds	—		—	%	2,389		1.87	%	1,397		2.47	%	—		—	%
Total fixed income securities	$	17,728	0.98	%	$	67,297	1.39	%	$	44,388	3.93	%	$	48,269	2.51	%
At fair value:
Total fixed income securities	$	17,794			$	67,696			$	45,488			$	47,845

11

ENTERPRISE BANCORP, INC.

Notes to the Unaudited Consolidated Financial Statements (continued)

Scheduled contractual maturities may not reflect the actual maturities of the investments. MBS/CMOs are shown at their final maturity. However, due to prepayments and amortization the actual MBS/CMO cash flows may be faster than presented above. Similarly, included in the carrying value of fixed income investments above are callable securities, comprised of municipal securities, federal agency obligations and corporate bonds totaling $46.0 million, which can be redeemed by the issuer prior to the maturity presented above.  Management considers these factors when evaluating the net interest margin in the Company’s asset-liability management program.

See Note 12, “Fair Value Measurements” below for further information regarding the Company’s fair value measurements for available-for-sale securities.

From time to time the Company may pledge securities as collateral against deposit account balances of municipal deposit customers, for Federal Home Loan Bank of Boston ("FHLB") borrowing capacity and as collateral for borrowing from the Federal Reserve Bank of Boston ("FRB").  The fair value of securities pledged as collateral for these purposes was $173.8 million at June 30, 2013. 

(5) Restricted Investments

As a member of the FHLB, the Company is required to purchase certain levels of FHLB capital stock 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.

Based on management’s ongoing review, the Company has not recorded any other-than-temporary impairment charges on this investment to date. However, if negative events or deterioration in the FHLB financial condition or capital levels occurs, the Company’s investment in FHLB capital stock may become other-than-temporarily impaired to some degree. 

(6) Loans

Major classifications of loans at the periods indicated, are as follows:

(Dollars in thousands)	June 30, 2013			December 31, 2012
Real estate:
Commercial real estate	$	785,994		$	710,265
Commercial construction	116,348			121,367
Residential mortgages	122,704			120,278
Total real estate	1,025,046			951,910
Commercial and industrial	343,509			328,579
Home equity	74,639			75,648
Consumer	5,649			4,911
Gross loans	1,448,843			1,361,048
Deferred loan origination fees, net	(1,497		)	(1,393		)
Total loans	1,447,346			1,359,655
Allowance for loan losses	(25,671		)	(24,254		)
Net loans	$	1,421,675		$	1,335,401

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

12

ENTERPRISE BANCORP, INC.

Notes to the Unaudited Consolidated Financial Statements (continued)

unsecured personal loans and lines of credit (see Note 7, "Allowance for Loan Losses," for additional information on the Company's credit risk management).

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 property 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 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 Small Business Administration (SBA), loans under various programs issued in conjunction with the Massachusetts Development Finance Agency and other agencies.  Commercial and industrial credits may be unsecured loans and lines to financially strong borrowers, 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 the underlying real estate collateral and are generally guaranteed by the principals of the borrowers.  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, either by experienced construction lenders on staff or by independent outside inspection companies, at each construction phase, prior to advancing additional funds.  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.  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 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 the 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 the participating institution amounted to $35.5 million at June 30, 2013 and $28.6 million at December 31, 2012.

Standby letters of credit are conditional commitments issued by the Company to guarantee the financial obligation or performance by 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, vacation homes, or investment properties.  Loan to value limits vary, generally from 80% for adjustable rate and multi-family, owner occupied properties, up to 97% for fixed rate loans on 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

13

ENTERPRISE BANCORP, INC.

Notes to the Unaudited Consolidated Financial Statements (continued)

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.  All loans sold are currently sold without recourse, but are typically subject to standard secondary market underwriting and eligibility representations and warranties 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, before periodic rate adjustments begin.

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 primarily consist of secured or unsecured personal loans and overdraft protection lines on checking accounts extended to individual customers. The aggregate amount of overdrawn deposit accounts are reclassified as loan balances.

Loans serviced for others

At June 30, 2013 and December 31, 2012, the Company was servicing residential mortgage loans owned by investors amounting to $21.5 million and $22.2 million, respectively.  Additionally, the Company was servicing commercial loans participated out to various other institutions amounting to $53.9 million and $53.6 million at June 30, 2013 and December 31, 2012, 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)	June 30, 2013		December 31, 2012
Commercial real estate	$	205,210	$	216,080
Residential mortgages	88,836		94,552
Home equity	18,009		18,907
Total loans pledged to FHLB	$	312,055	$	329,539

14

ENTERPRISE BANCORP, INC.

Notes to the Unaudited Consolidated Financial Statements (continued)

(7) Allowance for Loan Loss

The Company manages its loan portfolio to avoid concentration by industry and loan size to minimize its credit risk exposure. In addition, the Company does not have a “sub-prime” mortgage program.  However, inherent in the lending process is the risk of loss due to customer non-payment, or “credit risk.” While the Company endeavors to minimize this risk through the credit 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.

Credit Quality Indicators

The level of adversely classified loans, delinquent and non-performing assets is largely a function of economic conditions, the overall banking environment, and the Company's underwriting, and credit risk management standards. The Company’s commercial lending focus may entail significant additional risks compared to long term financing on existing, owner-occupied residential real estate.  The Company endeavors to minimize this risk through sound underwriting practices and the risk management function. 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 individual loans, adversely classified loans, past due and non-accrual loans, impaired and restructured loans, and the level of foreclosure activity. 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.

The loan portfolio continued to show improving statistics related to migration of adversely classified, non-accrual, impaired loans and the level of Other Real Estate Owned ('"OREO") properties held during the quarter ended June 30, 2013. However, management believes that the credit profile of the portfolio will continue to be affected by lagging effects that the economic environment has had on the regional and local commercial markets.

- 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, to 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 the 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 guaranties; credit weaknesses are well-defined; 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 liquidation in full, 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.

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ENTERPRISE BANCORP, INC.

Notes to the Unaudited Consolidated Financial Statements (continued)

The following tables present the credit risk profile by internally assigned risk rating category at the periods indicated. 

	June 30, 2013
	Adversely Classified						Not Adversely
(Dollars in thousands)	Substandard		Doubtful		Loss		Classified		Gross Loans
Commercial real estate	$	15,253	$	—	$	—	$	770,741	$	785,994
Commercial and industrial	6,012		500		—		336,997		343,509
Commercial construction	3,685		—		—		112,663		116,348
Residential	1,380		—		—		121,324		122,704
Home equity	696		—		—		73,943		74,639
Consumer	40		—		—		5,609		5,649
Total gross loans	$	27,066	$	500	$	—	$	1,421,277	$	1,448,843

	December 31, 2012
	Adversely Classified						Not Adversely
(Dollars in thousands)	Substandard		Doubtful		Loss		Classified		Gross Loans
Commercial real estate	$	21,999	$	—	$	—	$	688,266	$	710,265
Commercial and industrial	5,993		1,460		48		321,078		328,579
Commercial construction	2,986		—		—		118,381		121,367
Residential	1,254		—		—		119,024		120,278
Home equity	661		—		—		74,987		75,648
Consumer	34		—		—		4,877		4,911
Total gross loans	$	32,927	$	1,460	$	48	$	1,326,613	$	1,361,048

The decrease in adversely classified loans since the prior period was due primarily to paydowns on several commercial relationships, and upgraded commercial loans, in particular one larger commercial real estate relationship of approximately $6.0 million classified as accruing/impaired/Troubled Debt Restructure (or "TDR") at December 31, 2012 which was upgraded during the period, due to the borrower’s improved financial condition and sustained performance over time, 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 loans.  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 and when, in the judgment of management, the 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. Additionally, deposit accounts overdrawn for 90 or more days are included in the consumer non-accrual numbers below.

16

ENTERPRISE BANCORP, INC.

Notes to the Unaudited Consolidated Financial Statements (continued)

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

Balance at June 30, 2013
(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	$	1,921	$	183	$	12,645	$	14,749	$	771,245	$	785,994
Commercial and industrial	449		34		5,997		6,480		337,029		343,509
Commercial construction	727		—		1,442		2,169		114,179		116,348
Residential	1,500		—		995		2,495		120,209		122,704
Home equity	85		—		477		562		74,077		74,639
Consumer	10		9		14		33		5,616		5,649
Total gross loans	$	4,692	$	226	$	21,570	$	26,488	$	1,422,355	$	1,448,843

Balance at December 31, 2012
(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	$	1,560	$	551	$	12,608	$	14,719	$	695,546	$	710,265
Commercial and industrial	472		55		6,993		7,520		321,059		328,579
Commercial construction	—		—		743		743		120,624		121,367
Residential	42		558		862		1,462		118,816		120,278
Home equity	73		9		390		472		75,176		75,648
Consumer	42		11		5		58		4,853		4,911
Total gross loans	$	2,189	$	1,184	$	21,601	$	24,974	$	1,336,074	$	1,361,048

At June 30, 2013 and December 31, 2012, all loans 90 or more days past due were carried as non-accruing. Included in the consumer non-accrual numbers in the table above were $8 thousand and $5 thousand of overdraft deposit account balances 90 days or more past due at June 30, 2013 and December 31, 2012, respectively. Total non-performing loans amounted to $21.6 million at both June 30, 2013 and December 31, 2012. Non-accrual loans which were not adversely classified amounted to $1.1 million at June 30, 2013 and $1.2 million at December 31, 2012. These balances primarily represented the guaranteed portions of non-performing Small Business Administration 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 increase in loans 30-59 days past due occurred primarily within the residential portfolio, due to a single large balance mortgage which was subsequently brought current, and in the commercial real estate and construction portfolios, with the majority of these loans just 30 days overdue at June 30, 2013.

The ratio of non-accrual loans to total loans amounted to 1.49% at June 30, 2013, 1.59% at December 31, 2012, and 1.93% at June 30, 2012.

At June 30, 2013, additional funding commitments for loans on non-accrual status totaled $592 thousand. 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 be made at the Company’s discretion.

- 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 in non-accrual status has been designated as impaired. 

17

ENTERPRISE BANCORP, INC.

Notes to the Unaudited Consolidated Financial Statements (continued)

Impaired loans include loans that have been modified in a troubled debt restructuring (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 credit loss.  Refer to heading “Allowance for probable loan losses methodology” contained in Note 5 “Allowance For Loan Losses,” to the Company’s consolidated financial statements contained in the Company’s 2012 Annual Report on Form 10-K for further discussion of management’s methodology used to estimate specific reserves for impaired loans.

Total impaired loans amounted to $29.3 million and $37.4 million, at June 30, 2013 and December 31, 2012, respectively.  Total accruing impaired loans amounted to $8.6 million and $16.6 million at June 30, 2013 and December 31, 2012, respectively, while non-accrual impaired loans amounted to $20.7 million and $20.8 million as of June 30, 2013 and December 31, 2012, respectively.  The decrease was primarily due to the changes discussed above under the heading "Adversely Classified Loans."

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

Balance at June 30, 2013
(Dollars in thousands)	Unpaid contractual principal balance		Total recorded investment in impaired loans		Recorded investment with no allowance		Recorded investment with allowance		Related allowance
Commercial real estate	$	18,212	$	16,245	$	11,873	$	4,372	$	915
Commercial and industrial	10,534		9,235		4,293		4,942		2,302
Commercial construction	3,034		2,916		986		1,930		739
Residential	846		799		377		422		163
Home equity	110		109		—		109		36
Consumer	19		19		—		19		19
Total	$	32,755	$	29,323	$	17,529	$	11,794	$	4,174

Balance at December 31, 2012
(Dollars in thousands)	Unpaid contractual principal balance		Total recorded investment in impaired loans		Recorded investment with no allowance		Recorded investment with allowance		Related allowance
Commercial real estate	$	24,760	$	22,859	$	18,735	$	4,124	$	1,041
Commercial and industrial	12,184		10,831		6,016		4,815		2,186
Commercial construction	3,091		2,932		995		1,937		753
Residential	687		648		390		258		65
Home equity	110		109		—		109		87
Consumer	14		14		—		14		14
Total	$	40,846	$	37,393	$	26,136	$	11,257	$	4,146

18

ENTERPRISE BANCORP, INC.

Notes to the Unaudited Consolidated Financial Statements (continued)

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

	Three Months Ended June 30, 2013				Three Months Ended June 30, 2012
(Dollars in thousands)	Average recorded investment		Interest income recognized		Average recorded investment		Interest income recognized
Commercial real estate	$	17,868	$	51	$	24,378	$	186
Commercial and industrial	9,252		24		9,806		68
Commercial construction	2,906		9		2,092		(4		)
Residential	804		3		722		5
Home equity	109		—		50		(1		)
Consumer	19		—		17		—
Total	$	30,958	$	87	$	37,065	$	254

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

	Six Months Ended June 30, 2013				Six Months Ended June 30, 2012
(Dollars in thousands)	Average recorded investment		Interest income recognized		Average recorded investment		Interest income recognized
Commercial real estate	$	20,155	$	149	$	24,281	$	310
Commercial and industrial	9,427		54		10,213		86
Commercial construction	2,902		33		2,054		17
Residential	807		4		698		5
Home equity	124		—		50		—
Consumer	16		—		17		1
Total	$	33,431	$	240	$	37,313	$	419

At June 30, 2013, additional funding commitments for impaired loans totaled $592 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 be made at the Company's discretion.

- Troubled Debt Restructures

Loans are designated as a TDR when, as part of an agreement to modify the original contractual terms of the loan, the Bank grants a concession on the terms, that would not otherwise be considered, as a result of financial difficulties of the borrower.  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 credit loss. 

Total TDR loans, included in the impaired loan figures above as of June 30, 2013 and December 31, 2012 were $18.9 million and $26.6 million, respectively.

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ENTERPRISE BANCORP, INC.

Notes to the Unaudited Consolidated Financial Statements (continued)

TDR loans on accrual status amounted to $8.1 million and $16.0 million at June 30, 2013 and December 31, 2012, respectively. During the current quarter, an accruing TDR commercial real estate relationship of approximately $6.0 million was upgraded and removed from impaired/TDR status, due to the borrower’s improved financial condition and sustained performance over time. TDR loans included in non-performing loans amounted to $10.8 million and $10.5 million at June 30, 2013 and December 31, 2012, respectively. The Company continues to work with commercial relationships and enters into loan modifications to the extent deemed to be necessary or appropriate to ensure the best mutual outcome given the current economic environment.

Troubled debt restructure agreements entered into during the three month period ended June 30, 2013

	Three months ended June 30, 2013
(Dollars in thousands)	Number of restructurings	Pre-modification outstanding recorded investment		Post-modification outstanding recorded investment
Commercial real estate	—	$	—	$	—
Commercial and industrial	1	100		62
Commercial construction	—	—		—
Residential	—	—		—
Home equity	—	—		—
Consumer	—	—		—
Total	1	$	100	$	62

Loans modified as troubled debt restructuring within the previous twelve months for which there was a subsequent payment default during the period noted are detailed below.

	Three months ended June 30, 2013
(Dollars in thousands)	Number of TDR’s that defaulted	Post-modification outstanding recorded investment
Commercial real estate	—	$	—
Commercial and industrial	—	—
Commercial construction	2	715
Residential	—	—
Home equity	—	—
Consumer	—	—
Total	2	$	715

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ENTERPRISE BANCORP, INC.

Notes to the Unaudited Consolidated Financial Statements (continued)

Troubled debt restructure agreements entered into during the six month period ended June 30, 2013. 

	Six months ended June 30, 2013
(Dollars in thousands)	Number of restructurings	Pre-modification outstanding recorded investment		Post-modification outstanding recorded investment
Commercial real estate	—	$	—	$	—
Commercial and industrial	1	100		62
Commercial construction	—	—		—
Residential	—	—		—
Home equity	—	—		—
Consumer	—	—		—
Total	1	$	100	$	62

Loans modified as troubled debt restructuring within the previous twelve months for which there was a subsequent payment default during the period noted are detailed below.

	Six months ended June 30, 2013
(Dollars in thousands)	Number of TDR’s that defaulted	Post-modification outstanding recorded investment
Commercial real estate	1	$	137
Commercial and industrial	—	—
Commercial construction	3	746
Residential	—	—
Home equity	—	—
Consumer	—	—
Total	4	$	883

There were $38 thousand in charge-offs associated with the TDRs, noted in the table above, during the six months ended June 30, 2013. Included in the table above were two TDR's modified during the previous twelve months which defaulted and were subsequently transferred to OREO during the current period with a total post modification outstanding balance of $167 thousand. At June 30, 2013, specific reserves allocated to the TDRs entered into during the 2013 period amounted to $1 thousand, as management considered it likely the principal would ultimately be collected.

21

ENTERPRISE BANCORP, INC.

Notes to the Unaudited Consolidated Financial Statements (continued)

Troubled debt restructure agreements entered into during the three month period ended June 30, 2012. 

	Three months ended June 30, 2012
(Dollars in thousands)	Number of restructurings	Pre-modification outstanding recorded investment		Post-modification outstanding recorded investment
Commercial real estate	—	$	—	$	—
Commercial and industrial	2	16		12
Commercial construction	—	—		—
Residential	—	—		—
Home equity	—	—		—
Consumer	—	—		—
Total	2	$	16	$	12

Loans modified as troubled debt restructuring within the previous twelve months for which there was a subsequent payment default during the period noted are detailed below.

	Three months ended June 30, 2012
(Dollars in thousands)	Number of TDR's that defaulted	Post- modification outstanding recorded investment
Commercial real estate	—	$	—
Commercial and industrial	2	12
Commercial construction	—	—
Residential	—	—
Home Equity	—	—
Consumer	—	—
Total	2	$	12

Troubled debt restructure agreements entered into during six month the period ended June 30, 2012. 

	Six months ended June 30, 2012
(Dollars in thousands)	Number of restructurings	Pre-modification outstanding recorded investment		Post-modification outstanding recorded investment
Commercial real estate	—	$	—	$	—
Commercial and industrial	5	126		123
Commercial construction	—	—		—
Residential	1	130		128
Home equity	—	—		—
Consumer	—	—		—
Total	6	$	256	$	251

22

ENTERPRISE BANCORP, INC.

Notes to the Unaudited Consolidated Financial Statements (continued)

Loans modified as troubled debt restructuring within the previous twelve months for which there was a subsequent payment default during the period noted are detailed below.

	Six months ended June 30, 2012
(Dollars in thousands)	Number of TDR's that defaulted	Post- modification outstanding recorded investment
Commercial real estate	—	$	—
Commercial and industrial	3	17
Commercial construction	—	—
Residential	1	128
Home Equity	—	—
Consumer	—	—
Total	4	$	145

There were no charge-offs associated with the TDRs noted in the tables above during the six months ended June 30, 2012.  At June 30, 2012, specific reserves allocated to the TDRs entered into during the 2012 period amounted to $31 thousand, as management considered it likely the principal would ultimately be collected. Interest payments received on non-accruing new 2012 TDR loans which were applied to principal and not recognized as interest income amounted to $3 thousand for the six months ended June 30, 2012.

Other Real Estate Owned

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. 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 carrying value of OREO at June 30, 2013 was $136 thousand and consisted of 1 property, compared to $500 thousand comprised of 1 property at December 31, 2012. During the six months ended June 30, 2013, 2 properties were sold, 1 of which was held at December 31, 2012, and 2 properties were added to OREO. There was $121 thousand of gains realized on the sale of OREO in 2013. There were $45 thousand gains on OREO sales during the six months ended June 30, 2012.

Allowance for probable loan losses methodology

On a quarterly basis, management prepares an estimate of the allowance necessary to cover estimated credit losses.  The Company maintains the allowance at a level that it deems adequate to absorb all reasonably anticipated losses from specifically known and other credit risks associated with the portfolio.  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 rely on a combination of qualitative and quantitative factors that could have an impact on the credit quality of the portfolio.

There have been no material changes in 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 Company’s most recent Annual Report on Form 10-K.  Refer to heading “Allowance for probable loan losses methodology” contained in Note 5 “Allowance For Loan Losses,” to the Company’s consolidated financial statements contained in the Company’s 2012 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.

23

ENTERPRISE BANCORP, INC.

Notes to the Unaudited Consolidated Financial Statements (continued)

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.

During the fourth quarter of 2012, the Company purchased a group of residential mortgage loans with a June 30, 2013 carrying value of $17.2 million. These purchased loans are initially booked at fair market value and, in accordance with accounting guidance, do not carry an initial allowance for loan losses. Management will continue to closely monitor this portfolio of non classified loans for estimated credit loss under general loss allocations taking into account the loss experience as well as the quantitative and qualitative factors identified above.

The allowance for loan losses amounted to $25.7 million at June 30, 2013 compared to $24.3 million at December 31, 2012. The allowance for loan losses to total loans ratio was 1.77% at June 30, 2013 and 1.78% at December 31, 2012 compared to 1.79% at June 30, 2012.

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 June 30, 2013.

Changes in the allowance for loan losses by segment for the three months ended June 30, 2013, are presented below:

(Dollars in thousands)	Cmml Real Estate		Cmml and Industrial		Cmml Constr			Resid. Mortgage		Home Equity		Consumer		Total
Beginning Balance at March 31, 2013	$	12,359	$	7,396	$	3,486		$	975	$	672	$	128	$	25,016
Provision	614		207		(382		)	58		10		27		534
Recoveries	61		31		50			—		—		3		145
Less: Charge offs	14		1		—			—		—		9		24
Ending Balance at June 30, 2013	$	13,020	$	7,633	$	3,154		$	1,033	$	682	$	149	$	25,671

Changes in the allowance for loan losses by segment for the six months ended June 30, 2013, 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, 2012	$	11,793	$	7,297	$	3,456		$	854	$	728		$	126	$	24,254
Provision	1,180		428		(352		)	51		(23		)	33		1,317
Recoveries	61		41		50			128		21			6		307
Less: Charge offs	14		133		—			—		44			16		207
Ending Balance at June 30, 2013	$	13,020	$	7,633	$	3,154		$	1,033	$	682		$	149	$	25,671
Ending allowance balance:
Allotted to loans individually evaluated for impairment	$	915	$	2,302	$	739		$	163	$	36		$	19	$	4,174
Allotted to loans collectively evaluated for impairment	$	12,105	$	5,331	$	2,415		$	870	$	646		$	130	$	21,497

24

ENTERPRISE BANCORP, INC.

Notes to the Unaudited Consolidated Financial Statements (continued)

Changes in the allowance for loan losses by segment for the three months ended June 30, 2012, are presented below:

(Dollars in thousands)	Cmml Real Estate		Cmml and Industrial		Cmml Constr		Resid. Mortgage		Home Equity			Consumer		Total
Beginning Balance at March 31, 2012	$	10,598	$	7,142	$	3,196	$	827	$	764		$	80	$	22,607
Provision	622		185		133		129		(43		)	24		1,050
Recoveries	—		146		—		—		—			2		148
Less: Charge offs	223		268		—		182		—			6		679
Ending Balance at June 30, 2012	$	10,997	$	7,205	$	3,329	$	774	$	721		$	100	$	23,126

Changes in the allowance for loan losses by segment for the six months ended June 30, 2012, 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, 2011	$	10,855	$	7,568	$	3,013	$	995		$	615	$	114		$	23,160
Provision	365		510		414		(39		)	105		(5		)	1,350
Recoveries	—		192		2		—			1		3			198
Less: Charge offs	223		1,065		100		182			—		12			1,582
Ending Balance at June 30, 2012	$	10,997	$	7,205	$	3,329	$	774		$	721	$	100		$	23,126
Ending allowance balance:
Allotted to loans individually evaluated for impairment	$	819	$	2,001	$	670	$	27		$	50	$	16		$	3,583
Allotted to loans collectively evaluated for impairment	$	10,178	$	5,204	$	2,659	$	747		$	671	$	84		$	19,543

The balances of loans as of June 30, 2013 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	$	16,245	$	769,749		$	785,994
Commercial and industrial	9,235		334,274			343,509
Commercial construction	2,916		113,432			116,348
Residential	799		121,905			122,704
Home equity	109		74,530			74,639
Consumer	19		5,630			5,649
Deferred Fees	—		(1,497		)	(1,497		)
Total loans	$	29,323	$	1,418,023		$	1,447,346

25

ENTERPRISE BANCORP, INC.

Notes to the Unaudited Consolidated Financial Statements (continued)

The balances of loans as of December 31, 2012 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	$	22,859	$	687,406		$	710,265
Commercial and industrial	10,831		317,748			328,579
Commercial construction	2,932		118,435			121,367
Residential	648		119,630			120,278
Home equity	109		75,539			75,648
Consumer	14		4,897			4,911
Deferred Fees	—		(1,393		)	(1,393		)
Total loans	$	37,393	$	1,322,262		$	1,359,655

(8) Supplemental Retirement Plan and Other Postretirement Benefit Obligations

Supplemental Retirement Plan (SERPs)

The Company has salary continuation agreements with two of its active executive officers, and one former executive officer who currently works on a part time basis. 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 Company has not recognized service cost 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 in exchange for the employee’s service rendered to that date.  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 cost, which was comprised of interest cost only, was $34 thousand for the three months ended June 30, 2013 compared to $38 thousand for the three months ended June 30, 2012, and $67 thousand for the six months ended June 30, 2013 compared to $76 thousand for the six months ended June 30, 2012.

Benefits paid amounted to $69 thousand and $138 thousand for both the three and six months ended June 30, 2013 and June 30, 2012, respectively. The Company anticipates accruing an additional $67 thousand to the plan during the remainder of 2013.

Supplemental Life Insurance

For certain senior and executive officers on whom the Bank owns bank owned life insurance ("BOLI"), the Company has provided supplemental life insurance which provides a death benefit to the officer’s designated beneficiaries.

The Company has recognized a liability for future benefits associated with an endorsement split-dollar life insurance arrangement that provides a benefit to an employee that extends to postretirement periods.

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 Postretirement Benefit Obligation,” which is the present value of the post retirement benefits associated with this arrangement.

26

ENTERPRISE BANCORP, INC.

Notes to the Unaudited Consolidated Financial Statements (continued)

The following table illustrates the net periodic post retirement benefit cost for the supplemental life insurance plans for the periods indicated:

	Three months ended June 30,				Six months ended June 30,
(Dollars in thousands)	2013		2012		2013		2012
Service Cost	$	1	$	1	$	1	$	3
Interest Cost	17		17		35		34
Net periodic post retirement benefit cost	$	18	$	18	$	36	$	37

(9) Stock-Based Compensation

The Company has individual stock incentive plans and has not changed the general terms and conditions of these plans from those disclosed in the Company’s 2012 Annual Report on Form 10-K.

The Company’s stock-based compensation expense includes stock option awards and restricted stock awards to officers, other employees and directors, and stock compensation in lieu of cash fees to directors.  Total stock-based compensation expense was $520 thousand and $859 thousand for the three and six months ended June 30, 2013, respectively, compared to $334 thousand and $652 thousand for the three and six months ended June 30, 2012, respectively.

Stock Option Awards

The Company recognized stock-based compensation expense related to stock option awards of $202 thousand and $269 thousand for the three and six months ended June 30, 2013, respectively, compared to $65 thousand and $125 thousand for the three and six months ended June 30, 2012, respectively.

There were a total of 44,175 and 67,750 stock option awards granted to employees during the six months ended June 30, 2013 and 2012, respectively. Options granted in 2013 will vest 50% in year two and 50% in year four, on the anniversary date of the award. Options granted in 2012 generally vest equally over four years, 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. The 2013 options expire ten years from the date of grant and the 2012 options expire seven years from the date of grant.

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. In the case of retirement, under current Company guidelines, unvested stock options may be accelerated if the employee meets certain retirement criteria.

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

27

ENTERPRISE BANCORP, INC.

Notes to the Unaudited Consolidated Financial Statements (continued)

The table below provides a summary of the options granted, fair value, the fair value as a percentage of the market value of the stock at the date of grant and the average assumptions used in the model for the options granted in 2013 and 2012.

	Six months ended June 30,
	2013			2012
Options granted	44,175			67,750
Average assumptions used in the model:
Expected volatility	48		%	50		%
Expected dividend yield	2.99		%	2.88		%
Expected life in years	7.0			5.5
Risk-free interest rate	1.29		%	1.38		%
Market price on date of grant	$	16.43		$	16.25
Per share weighted average fair value	$	6.56		$	6.33
Fair value as a percentage of market value at grant date	40		%	39		%

Refer to Note 12 “Stock-Based Compensation Plans” in the Company’s 2012 Annual Report on Form 10-K for a further description of the assumptions used in the valuation model.

Restricted Stock Awards

Stock-based compensation expense recognized in association with restricted stock awards amounted to $264 thousand and $481 thousand for the three and six months ended June 30, 2013, respectively, compared to $211 thousand and $416 thousand for the three and six months ended June 30, 2012, respectively.

During the six months ended June 30, 2013, the Company granted 78,806 shares of common stock in the form of restricted stock awards. The awards were comprised of 24,925 shares awarded to employees generally vesting over four years in equal portions beginning on or about the first anniversary date of the award, 47,735 shares awarded to certain individuals that are performance based awards which vest upon Enterprise achieving certain predefined performance objectives and 6,146 shares awarded to directors vesting over two years in equal portions beginning on or about the first anniversary date of the award. The weighted average grant date fair value of the restricted stock awarded was $16.43 per share, the market value of the common stock on the grant dates.

During the six months ended June 30, 2012, the Company granted 71,376 shares of common stock in the form of restricted stock awards comprised of 62,160 shares awarded to employees, generally vesting over four years, 3,000 shares awarded to an executive officer vesting immediately and 6,216 shares awarded to directors vesting over two years.  The weighted average grant date fair value of the restricted stock awarded was $16.25 per share, which reflects the market value of the common stock on the grant dates. The unvested 2012 awards generally vest, in each case, in equal portions beginning on or about the first anniversary date of the award.

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.

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. In the case of retirement, under current Company guidelines, a portion of the unvested restricted shares may be accelerated if the employee meets certain retirement criteria.

Stock in Lieu of Directors’ Fees

In addition to restricted stock awards discussed above, the 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 Directors’ election to receive shares of common stock in lieu of cash fees for attendance at Board and Board committee meetings amounted to $54 thousand and $109 thousand for the

28

ENTERPRISE BANCORP, INC.

Notes to the Unaudited Consolidated Financial Statements (continued)

three and six months ended June 30, 2013, respectively, compared to $58 thousand and $111 thousand for the three and six months ended June 30, 2012, respectively. In January 2013, directors were issued 12,592 shares of common stock in lieu of cash fees related to the 2012 annual directors’ stock-based compensation expense of $184 thousand and a market value price of $14.63 per share, the market value of the common stock on the opt-in measurement date, January 3, 2012.

(10) 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, primarily due to the impact of tax exempt interest from certain investment securities, loans and bank owned life insurance.

The Company did not have any unrecognized tax benefits accrued as income tax liabilities or receivables or as deferred tax items at June 30, 2013.  The Company is subject to U.S. federal and state income tax examinations by taxing authorities for the 2006 through 2012 tax years.

(11) Earnings per share

Basic earnings per share are calculated by dividing net income 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 June 30,		Six months ended June 30,
	2013	2012	2013	2012
Basic weighted average common shares outstanding	9,825,335	9,588,420	9,770,559	9,543,994
Dilutive shares	64,304	67,308	69,457	68,193
Diluted weighted average common shares outstanding	9,889,639	9,655,728	9,840,016	9,612,187

For the six months ended June 30, 2013, there were an additional 6,000 average stock options outstanding, which were excluded from the year-to-date calculation of diluted earnings per share due to the exercise price of these options exceeding the average market price of the Company’s common stock for the period.  These options, which were not dilutive at that date, may potentially dilute earnings per share in the future.

29

ENTERPRISE BANCORP, INC.

Notes to the Unaudited Consolidated Financial Statements (continued)

(12) 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; (Level 3) significant unobservable inputs for situations in which there is little, if any, market activity for the asset or liability.  Unobservable inputs must reflect reasonable assumptions that market participants would use in pricing the asset or liability, which are developed on the basis of the best information available under the circumstances.

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

	June 30, 2013		Fair Value Measurements using:
(Dollars in thousands)	Fair Value		(level 1)		(level 2)		(level 3)
Assets measured on a recurring basis:
Fixed income securities	$	179,678	$	—	$	179,678	$	—
Equity securities	10,781		10,781		—		—
FHLB Stock	4,324		—		—		4,324
Assets measured on a non-recurring basis:
Impaired loans (collateral dependent)	7,540		—		—		7,540
Other real estate owned	136		—		—		136

	December 31, 2012		Fair Value Measurements using:
(Dollars in thousands)	Fair Value		(level 1)		(level 2)		(level 3)
Assets measured on a recurring basis:
Fixed income securities	$	173,796	$	—	$	173,796	$	—
Equity securities	10,668		10,668		—		—
FHLB Stock	4,260		—		—		4,260
Assets measured on a non-recurring basis:
Impaired loans (collateral dependent)	7,110		—		—		7,110
Other real estate owned	500		—		—		500

The Company did not have cause to transfer any assets between the fair value measurement levels during the six months ended June 30, 2013 or the year ended December 31, 2012. There were no liabilities measured at fair value on a recurring or non-recurring basis as of June 30, 2013 or December 31, 2012. There were no gains or losses due to changes in fair value, recorded in earnings for level 3 assets for the six months ended June 30, 2013, or the year ended December 31, 2012. 

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, federal agency MBS, municipal securities, corporate bonds and certificates of deposits as held at those dates. Certificates of deposit are investment securities issued by financial institutions. They are subject to FDIC insurance and trade in the open market. 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

30

ENTERPRISE BANCORP, INC.

Notes to the Unaudited Consolidated Financial Statements (continued)

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.

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 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. 

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 credit loss.  The specific allowances assigned to the collateral dependent impaired loans at June 30, 2013 amounted to $2.7 million compared to $3.3 million at December 31, 2012, a net decrease of $592 thousand.

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 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 carrying values of OREO at both June 30, 2013 and December 31, 2012 consisted of one property, respectively, at the end of each period. Two properties were added and two properties were sold during 2013; net gains realized on the sale of the OREO properties were $121 thousand.

The following table presents additional quantitative information about assets measured at fair value on a recurring and non-recurring basis for which the Company utilized Level 3 inputs (significant unobservable inputs for situations in which there is little, if any, market activity for the asset or liability) to determine fair value as of June 30, 2013.

(Dollars in thousands)	Fair Value	Valuation Technique	Unobservable Input	Unobservable Input Value or Range
Assets measured on a recurring basis:
FHLB Stock	$4,324	FHLB Stated Par Value	N/A	N/A
Assets measured on a non-recurring basis:
Impaired loans (collateral dependent)	$7,540	Appraisal of collateral	Appraisal adjustments (1)	5% - 50%
Other real estate owned	$136	Appraisal of collateral	Appraisal adjustments (1)	0% - 30%

(1) Appraisals may be adjusted by management for qualitative factors such as economic conditions and estimated liquidation expenses.

Other Guarantees and Commitments

Standby letters of credit are conditional commitments issued by the Company to guarantee the performance by a customer to a third party.  The fair value of these commitments was estimated to be the fees charged to enter into similar agreements, and accordingly these fair value measures are deemed to be FASB Level 2 measurements.  In accordance with the FASB, the estimated fair values of these commitments are carried on the balance sheet as a liability and amortized to income over the life of the letters of credit, which are typically one year.  The estimated fair value of these commitments carried on the balance sheet at June 30, 2013 and December 31, 2012 were deemed immaterial.

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ENTERPRISE BANCORP, INC.

Notes to the Unaudited Consolidated Financial Statements (continued)

Interest rate lock commitments related to the origination of mortgage loans that will be sold are considered derivative instruments.  The Company estimates the fair value of these derivatives using the difference between the guaranteed interest rate in the commitment and the current market interest rate.  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 commitments to sell loans are also considered derivative instruments, with estimated fair values based on changes in current market rates.  These commitments represent the Company’s only derivative instruments and are accounted for in accordance with FASB guidance.  The fair values of the Company’s derivative instruments are deemed to be FASB Level 2 measurements.  At June 30, 2013 and December 31, 2012, the estimated fair value of the Company’s derivative instruments was considered to be immaterial.

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.  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 non-accrual 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.

Commitments: The fair values of the unused portion of lines of credit and letters of credit were estimated to be the fees currently charged to enter into similar agreements.  Commitments to originate non-mortgage loans were short-term and were at current market rates and estimated to have no significant change in fair value.

Financial liabilities: The fair values of certificates of deposit and borrowings were estimated using discounted cash flow analysis using rates offered by the Bank, or advance rates offered by the FHLB on June 30, 2013 and December 31, 2012 for similar instruments.  The fair value of junior subordinated debentures was estimated using discounted cash flow analysis using a market rate of interest at June 30, 2013 and December 31, 2012.

Limitations:  The estimates of fair value of financial instruments were based on information available at June 30, 2013 and December 31, 2012 and are not indicative of the fair market value of those instruments as of the date of this report.  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.

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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ENTERPRISE BANCORP, INC.

Notes to the Unaudited Consolidated Financial Statements (continued)

The carrying values, estimated fair values and placement in the fair value hierarchy of the Company’s financial instruments⁽¹⁾ for which fair value is only disclosed but not recognized on the balance sheet at the dates indicated are summarized as follows:

	June 30, 2013		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	$3,917	$3,917	$	—	$	3,917	—
Loans, net	$1,421,675	$1,450,436	$	—	$	—	1,450,436
Financial liabilities:
Certificates of deposit (including brokered)	268,162	266,740	—		266,740		—
Borrowed funds	1,880	1,883	—		1,883		—
Junior subordinated debentures	10,825	11,592	—		—		11,592

	December 31, 2012		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	$8,557	$8,603	$	—	$	8,603	—
Loans, net	$1,335,401	$1,355,893	$	—	$	—	$1,355,893
Financial liabilities:
Certificates of deposit (including brokered)	231,198	231,687	—		231,687		—
Borrowed funds	26,540	26,553	—		26,553		—
Junior subordinated debentures	10,825	12,597	—		—		12,597

(1) Excluded from this table are certain financial instruments that approximated their fair value, 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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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”) consolidated financial statements and notes thereto contained in this report and the Company’s 2012 Annual Report on Form 10-K.

Accounting Policies/Critical Accounting Estimates

As discussed in the Company’s 2012 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.  The Company has not changed its significant accounting and reporting policies from those disclosed in its 2012 Annual Report on Form 10-K.

Special Note Regarding Forward-Looking Statements

This report 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,” 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 wishes to caution readers that such forward-looking statements reflect numerous assumptions and involve a number of risks and uncertainties that may adversely affect the Company's future results. The forward-looking statements in this report are based on information available to the Company as of the date of this report 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. 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 herein: (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 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 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 Financial Accounting Standards Board (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; (xi) future regulatory compliance costs, including any increase caused by new regulations imposed by the Consumer Finance Protection Bureau; (xii) changes to the regulatory capital requirements mandated under rulemaking pursuant to Basel III; and (xiii) some or all of the risks and uncertainties described in Item 1A of the Company’s 2012 Annual Report on Form 10-K could be realized, which could have a material adverse effect on the Company’s business, financial condition and results of operation.  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

The Company continued to focus on organic growth and market expansion while management remains committed to strategic investments in technology, our communities, and our family of Enterprise employees. We continue to plan for the Company's future by strengthening our franchise in Massachusetts and Southern New Hampshire. Our 21st branch office opened in April 2013 in Lawrence, MA, and our Nashua, NH office is scheduled to open in the fourth quarter of 2013.

Through the first six months of 2013, total assets increased $87.6 million, or 5.3%, compared to December 31, 2012, amounting to $1.75 billion at June 30, 2013. Loans outstanding and deposits, excluding brokered deposits, have increased $87.7 million, or 6.4%, and $54.8 million, or 3.7%, respectively, in the first six months of 2013. On an annualized basis, total assets and loans have grown 11% and 13%, respectively, in 2013. Average deposits, excluding brokered deposits, for the first six months of 2013 have increased 6% compared to the same period in 2012.

Net income for the three months ended June 30, 2013 amounted to $3.1 million, representing an increase of $174 thousand, or 6%, compared to the same three month period in 2012. Diluted earnings per share were $0.31 for the three months ended June 30, 2013, an increase of $0.01, or 3%, compared to the same period in the prior year. Net income for the six months ended June 30, 2013 amounted to $6.5 million, representing an increase of $434 thousand, or 7%, compared to the same six month period in 2012. Diluted earnings per share were $0.66 for the six months ended June 30, 2013, an increase of $0.03, or 5%, compared to the same period in the prior year.

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"). Consistent with the industry and ongoing market conditions, during the first six months of 2013, the Company's margin continued to trend downward, as the yield on interest-earning assets declined faster than the cost of funding, as funding rates have reached a level leaving little room for significant reductions. The Company's success in growing the commercial loan portfolio and its low cost deposit base has helped to offset the impact of this margin compression.

The Company's growth contributed to increases in net interest income, non-interest income and the level of operating expenses for the current year compared to the same period in 2012. Non-interest income also increased as a result of higher gains on securities sales in the current year. Additionally, the quarter ended June 30, 2013 benefited from a lower loan loss provision compared to the same period in 2012, partially offset by the costs of our signature "Celebration of Excellence" community recognition event held in May 2013.

Composition of Earnings

Net interest income for the three months ended June 30, 2013 amounted to $16.1 million, an increase of $716 thousand, or 5%, compared to the same period in 2012.Net interest income for the six months ended June 30, 2013 amounted to $31.9 million, an increase of $1.6 million, or 5%, compared to the same period in 2012. This increase in net interest income was due primarily to revenue generated from loan growth, partially offset by a decrease in margin. Average loan balances (including loans held for sale) increased $162.3 million and $150.6 million for the three and six months ended June 30, 2013, respectively, compared to the same periods in 2012. Net interest margin was 4.08% for the quarter ended June 30, 2013, compared to 4.31% for the quarter ended June 30, 2012. Margin was 4.16% for the quarter ended March 31, 2013. Year-to-date margins were 4.12% and 4.33% for the six months ended June 30, 2013 and 2012, respectively.

The provision for loan losses amounted to $534 thousand for the three months ended June 30, 2013, compared to $1.1 million for the same period in 2012. For the six months ended June 30, 2013 and 2012, the provision for loan losses amounted to $1.3 million and $1.4 million, respectively. 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. The level of loan growth for the six months ended June 30, 2013, was $87.7 million, compared to $44.7 million during the same period in 2012. The balance of the allowance for loan losses allocated to impaired loans amounted to $4.2 million at June 30, 2013, compared to $3.6 million at June 30, 2012. Total non-performing assets as a percentage of total assets were 1.24% at June 30, 2013, compared to 1.61% at June 30, 2012. For the six months ended June 30, 2013, the Company recorded net recoveries of $100 thousand. For the six months ended June 30, 2012, net charge-offs were $1.4 million. Management continues to closely monitor the non-performing assets, charge-offs and

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necessary allowance levels, including specific reserves. The allowance for loan losses to total loans ratio was 1.77% at June 30, 2013, 1.78% at December 31, 2012 and 1.79% at June 30, 2012.

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 and six months ended June 30, 2013 amounted to $3.6 million and $7.2 million, respectively, increases of $601 thousand, or 20%, and $1.3 million, or 21%, respectively, compared to the same periods in 2012. The increases over the 2012 periods were primarily due to increases in gains on securities sales, deposit and interchange fees and investment advisory fee income. The year-to-date increase also benefited from gains on loan sales.

Non-interest expense for the three months ended June 30, 2013 amounted to $14.5 million, an increase of $1.5 million, or 11%, compared to the second quarter of 2012. For the six months ended June 30, 2013, non-interest expense amounted to $27.9 million, an increase of $2.1 million, or 8%, compared to the same period in the prior year. Increased expenses related to salaries and benefits, occupancy and technology over the comparable periods in the prior year were primarily due to the Company's strategic growth initiatives, including branch expansion. Advertising increased over the prior year periods primarily due to the timing of corporate community events. Partially offsetting these increases were reductions in legal and other professional costs.

Sources and Uses of Funds

The Company’s primary sources of funds are 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 brokered deposits and overnight borrowings from correspondent banks as additional funding sources. These funds are used to originate loans, purchase investment securities, conduct operations, expand the branch network, and pay dividends to shareholders.

The investment portfolio is primarily used to provide liquidity, manage the Company’s asset-liability position and to invest excess funds. Total investments, one of the key components of earning assets, amounted to $190.5 million at June 30, 2013, and comprised 11% of total assets at both June 30, 2013 and December 31, 2012.

Enterprise's main asset strategy is to grow loans, the largest component of earning assets, primarily high quality commercial loans.  Total loans increased $87.7 million, or 6%, since December 31, 2012, primarily in commercial real estate, and amounted to $1.45 billion, or 83% of total assets, at June 30, 2013. Total commercial loans amounted to $1.25 billion, or 86% of gross loans, which was relatively consistent with the composition at December 31, 2012.

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 June 30, 2013, deposits, excluding brokered deposits, amounted to $1.53 billion, an increase of $54.8 million, or 4%, from December 31, 2012 balances. This increase since December 31, 2012 was primarily due to increases in checking account balances of $34.5 million, or 6%, and savings and money market account balances of $32.8 million, or 5%, partially offset by a decrease of $12.5 million in CD balances.

Wholesale funding amounted to $54.4 million at June 30, 2013, compared to $29.6 million at December 31, 2012.  The increase in wholesale funding primarily resulted from loan growth exceeding deposit growth in the quarter. Wholesale funding included FHLB advances of $1.9 million and $26.5 million at June 30, 2013 and December 31, 2012, respectively, and brokered deposits of $52.5 million and $3.0 million at June 30, 2013 and December 31, 2012, respectively. As part of the Company's asset-liability management strategy to protect against rising rates, wholesale funding balances were shifted from overnight FHLB borrowings to brokered CDs with an average life of approximately five years.

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 by capitalizing on market opportunities created by the current challenging banking landscape. 

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Enterprise faces robust competition to retain and attract 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 companies, mortgage brokers and lenders, private lenders, insurance companies, securities brokerage firms, institutional mutual funds, registered investment advisors, internet based banks and non-bank payment channels.  Advances in, and the increased use of technology, such as internet and mobile banking, electronic transaction processing and information security, are expected to have a significant impact on the future competitive landscape confronting financial institutions.

Management believes the Company's community service culture, business model, full range of diversified financial products and services, and state-of-the-art delivery channels position the Company to be a leading provider of banking and investment advisory and wealth management services in its growing market area. The Company has differentiated itself by building a solid reputation within the local market for delivering consistently superior customer service and taking an active role in support of the communities we serve. The Company's banking professionals have developed in-depth knowledge of our markets and are committed to upholding the Company’s core values, including significant community involvement, which has led to a strong referral network with local business and community leaders. 

The Company seeks to increase deposit share through continuous reviews of deposit product offerings, ancillary services and delivery channels, targeted to both business' 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 in neighboring markets. The Company has opened three branch offices in the past 18 months, and another office in Nashua, NH is scheduled to open by the end of the year, our fifth southern NH location. The Company believes that each of these offices is strategically located to complement existing locations while expanding the Company's geographic market footprint. This branch expansion is aimed at achieving not only deposit market share growth, but also contributes to loan originations and generates referrals for investment advisory and wealth management and insurance services.

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 has served to provide quality asset growth over varying economic cycles during the Company’s twenty-four year 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.

Management continues to undertake significant strategic initiatives, including investments in employee training and development, marketing and public relations, technology and electronic delivery methods, branch expansion and ongoing improvements and renovations of existing branches and operations facilities.  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 of the Company and are reflective of the opportunities in the current marketplace for community banks such as Enterprise. However, lower than expected return 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 stagnation or deterioration of the current economic environment could weaken the local New England economy and have adverse repercussions on local industries, leading to increased unemployment and mortgage foreclosures, further deterioration of local commercial real estate values, or 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 continuation or worsening of the current economic environment could have a material adverse effect

37

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 of 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.

In addition, a sustained low interest rate environment caused by the current economic cycle, or other factors, could negatively impact the Company's net interest income and results of operation. The re-pricing frequency of interest earning assets and liabilities are not identical, and, therefore, subject the Company to the risk of adverse changes in interest rates.  This is often referred to as “interest rate risk” and 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. For information regarding the current capital requirements applicable to the Company and the Bank and their respective capital levels at June 30, 2013, and the recently adopted changes to the regulatory capital framework, see the section entitled “Capital Resources” contained in this Item 2 below. At June 30, 2013, both the Company and the Bank were categorized as “well capitalized;” however, future unanticipated charges against capital, or changes in regulatory requirements such as Basel III discussed below, could impact those regulatory capital designations. 

In addition, any further changes in government regulation or oversight, including the implementation by the federal regulatory agencies of the various requirements contained in the Dodd-Frank Act and rules under Basel III, could affect the Company in substantial and unpredictable ways, including, but not limited to, subjecting the Company to additional operating, governance and compliance costs, or potential loss of revenue due to the impact of an enhanced regulatory structure on the banking industry, and require all U.S. banking organizations, including community banks, such as Enterprise Bank, to hold higher amounts of capital, especially common equity, against their risk-weighted assets. Although several significant aspects of the Dodd-Frank Act and the Basel III rule expressly apply only to larger, “systemically significant” institutions, they may have the potential to influence the Company's business decisions, while other parts of the legislation apply either directly, or potentially indirectly, to activities of community banks, such as Enterprise.

Many aspects of the Dodd-Frank Act are subject to rulemaking by various regulatory agencies and will take effect over several years, making it difficult at this time to anticipate the overall financial impact of this expansive legislation on the Company, its customers or the financial industry generally. Likewise, any new consumer financial protection laws enacted by the Consumer Financial Protection Bureau would apply to all banks and thrifts, and may increase the Company's compliance and operational costs in the future.

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 (CMP) designed to meet regulatory and legislative requirements.  The CMP provides 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 or physical security; or violations of ethical standards. Controls to manage operational risk include, but are not limited to, technology administration, information security, vendor management and business continuity planning.

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 has implemented layered security approaches for all delivery channels and technology project standards that 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.

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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 access, and continuously scan for computer viruses on the Company’s information systems.

The Company has a risk-based, third-party vendor management program designed to provide a mechanism to enable management to determine what risk, if any, a particular vendor exposes the Company to, to rate those risks, and to mitigate that risk by properly performing initial and ongoing due diligence when selecting or maintaining relationships with significant third-party providers.

The Company’s Business Continuity Plan 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 such circumstances as: loss of personnel; loss of information and/or loss of access to information under various scenarios; and 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 auxiliary network processing capabilities and flexibility. 

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.

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 2012 Annual Report on Form 10-K, which address numerous other factors and details that could adversely affect the Company’s reputation, its future results of operations and financial condition.

Financial Condition

Total assets increased $87.6 million, or 5%, since December 31, 2012, to $1.75 billion at June 30, 2013.  The balance sheet composition and changes since December 31, 2012 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, money market, and money market mutual funds accounts) and fed funds sold. Cash and cash equivalents amounted to 3% of total assets at both June 30, 2013, and December 31, 2012.

Investments

At June 30, 2013, the carrying value of the investment portfolio amounted to $190.5 million, an increase of $6.0 million, or 3%, compared to December 31, 2012. 

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The following table summarizes investments at the dates indicated:

	June 30, 2013				December 31, 2012				June 30, 2012
(Dollars in thousands)	Amount		Percent		Amount		Percent		Amount		Percent
Federal agency obligations(1)	$	65,252	34.2	%	$	65,685	35.6	%	$	62,809	38.0	%
Federal agency mortgage backed securities (MBS)(1)	52,157		27.4	%	49,674		26.9	%	39,271		23.8	%
Municipal securities	57,678		30.3	%	56,523		30.7	%	53,690		32.5	%
Corporate bonds	3,736		2.0	%	1,914		1.0	%	—		—	%
Certificates of deposits	855		0.4	%	—		—	%	982		0.6	%
Total fixed income securities	179,678		94.3	%	173,796		94.2	%	156,752		94.9	%
Equity investments	10,781		5.7	%	10,668		5.8	%	8,459		5.1	%
Total available for sale investments at fair value	$	190,459	100.0	%	$	184,464	100.0	%	$	165,211	100.0	%

__________________________________________ 

(1) These categories may include investments issued or guaranteed by government sponsored enterprises such as Fannie Mae (FNMA), Freddie Mac (FHLMC), Ginnie Mae (GNMA), Federal Farm Credit Bank, or one of several Federal Home Loan Banks.  All agency MBS/CMO investments owned by the Company are backed by residential mortgages.

Included in the federal agency MBS categories above were CMOs totaling $20.6 million, $23.6 million, and $18.1 million at June 30, 2013, December 31, 2012, and June 30, 2012, respectively.

Certificates of Deposits ("CDs") represent term deposits issued by banks, that are subject to FDIC insurance, and purchased on the open market. The Company utilizes these CDs as an alternative investment option to holding short-term excess cash in lower yielding overnight deposit accounts. These securities have maturities of less than a year and the market value approximates the carrying value.

During the six months ended June 30, 2013, the total principal pay downs, calls and maturities amounted to $8.0 million.  During the period, the Company purchased $24.3 million in securities. In addition, management sold investment securities with an amortized cost of approximately $6.4 million realizing net gains on sales of $948 thousand, in order to capitalize on market conditions. 

Net unrealized gains on the investment portfolio amounted to $3.0 million at June 30, 2013 compared to $6.4 million at December 31, 2012 and $5.6 million at June 30, 2012.  Unrealized gains or losses will only be 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 Note 4, “Investment Securities,” and Note 12, “Fair Value Measurements,” to the Company’s unaudited consolidated 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 Company is required to purchase stock of the FHLB 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 $4.3 million for each of the periods ended June 30, 2013, December 31, 2012 and June 30, 2012. See Note 5, “Restricted Investments,” to the Company’s unaudited consolidated financial statements contained in Item 1 above for further information regarding the Company’s investment in FHLB stock.

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Loans

Total loans represented 83% of total assets as of June 30, 2013, compared to 82% at December 31, 2012.  Total loans increased $87.7 million, or 6%, compared to December 31, 2012, and $157.2 million, or 12%, since June 30, 2012.  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.

	June 30, 2013					December 31, 2012					June 30, 2012
(Dollars in thousands)	Amount			Percent		Amount			Percent		Amount			Percent
Commercial real estate	$	785,994		54.2	%	$	710,265		52.2	%	$	668,369		51.8	%
Commercial and industrial	343,509			23.7	%	328,579			24.1	%	331,064			25.6	%
Commercial construction	116,348			8.0	%	121,367			8.9	%	121,119			9.4	%
Total commercial loans	1,245,851			85.9	%	1,160,211			85.2	%	1,120,552			86.8	%
Residential mortgages	122,704			8.5	%	120,278			8.8	%	89,216			6.9	%
Home equity loans and lines	74,639			5.2	%	75,648			5.6	%	77,860			6.0	%
Consumer	5,649			0.4	%	4,911			0.4	%	3,824			0.3	%
Total retail loans	202,992			14.1	%	200,837			14.8	%	170,900			13.2	%
Gross loans	1,448,843			100.0	%	1,361,048			100.0	%	1,291,452			100.0	%
Deferred fees, net	(1,497		)			(1,393		)			(1,286		)
Total loans	1,447,346					1,359,655					1,290,166
Allowance for loan losses	(25,671		)			(24,254		)			(23,126		)
Net loans	$	1,421,675				$	1,335,401				$	1,267,040

Commercial real estate loans increased $75.7 million, or 11%, as of June 30, 2013, compared to December 31, 2012, and increased 18% compared to June 30, 2012.  Commercial real estate loans are typically secured by one-to-four and multi-family apartment buildings, office or mixed-use facilities, strip shopping centers or other commercial or industrial property.

Commercial and industrial loans increased by $14.9 million, or 5%, since December 31, 2012, and increased 4% as compared to June 30, 2012.  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 under various U.S. Small Business Administration programs.

Commercial construction loans decreased by $5.0 million, or 4%, since December 31, 2012, and also decreased 4% as compared to June 30, 2012. 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 loans increased by $2.2 million, or 1%, since December 31, 2012 and increased by $32.1 million, or 19%, since June 30, 2012.  The increase since the prior year was primarily within the residential mortgage portfolio, partially offset by a slight decrease in home equity loans and lines. In the fourth quarter of 2012, the Company purchased a group of residential mortgage loans with a balance at June 30, 2013 of $17.2 million.

At June 30, 2013, commercial loan balances participated out to various banks amounted to $53.9 million, compared to $53.6 million at December 31, 2012, and $46.3 million at June 30, 2012.  These 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 the participating institution are carried at the pro-rata share of ownership and amounted to $35.5 million, $28.6 million and $31.8 million at June 30, 2013, December 31, 2012, and June 30, 2012, respectively.  In each case, the participating bank funds a percentage of the loan commitment and takes on the related 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.

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See Note 6, “Loans,” to the Company’s unaudited consolidated financial statements contained in Item 1 for information on loans serviced for others and loans pledged as collateral.

Credit Risk

The Company manages its loan portfolio to avoid concentration by industry and loan size to minimize its credit risk exposure. In addition, the Company does not have a “sub-prime” mortgage program.  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.  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.  The underlying commercial real estate values, customer cash flow and payment expectations and, in the case of commercial construction loans, the actual costs necessary to complete a construction project, can be more easily influenced by adverse conditions in the local or national economy, the real estate market, or the related industries.  As such, an extended downturn in the national or local economy or real estate markets, among other factors, could have a material impact on the borrowers’ ability to repay outstanding loans and on the value of the collateral securing these loans.  While the Company endeavors to minimize this risk through sound underwriting practices and the credit 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, adversely classified loans, past due and non-accrual loans, impaired and restructured loans, and the level of foreclosure activity. 

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-performing or non-accrual loans. 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 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 restructure ("TDR"). 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 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.

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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 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, the Bank grants a concession on the terms, that would not otherwise be considered, as a result of financial difficulties of the borrower.  Typically, such concessions 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 credit loss.

Real estate acquired by the Company through foreclosure proceedings or the acceptance of a deed in lieu of foreclosure is classified as Other Real Estate Owned ("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. 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.

Asset Quality

At June 30, 2013, the Company had adversely classified loans (loans carrying “substandard,” “doubtful” or “loss” classifications) amounting to $27.6 million, compared to $34.4 million at December 31, 2012.  The decrease in adversely classified loans since the prior period was due primarily to paydowns on several commercial relationships, and upgraded commercial loans, in particular one larger commercial real estate relationship of approximately $6.0 million classified as accruing/impaired/troubled debt restructured ("TDR") at December 31, 2012 which was upgraded during the period, due to the borrower's improved financial condition and sustained performance over time, 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 $7.1 million at June 30, 2013 and $14.0 million at December 31, 2012.  This decrease was due primarily to the upgraded commercial real estate relationship noted above. The remaining balances of adversely classified loans were non-accrual loans, amounting to $20.5 million and $20.4 million at June 30, 2013 and December 31, 2012, respectively.  Non-accrual loans which were not adversely classified amounted to $1.1 million and $1.2 million at June 30, 2013 and December 31, 2012, respectively, and primarily represented the guaranteed portions of non-performing Small Business Administration loans.

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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)	June 30, 2013			December 31, 2012			June 30, 2012
Commercial real estate	$	12,645		$	12,608		$	13,723
Commercial and industrial	5,997			6,993			8,754
Commercial construction	1,442			743			700
Residential	995			862			1,237
Home equity	477			390			523
Consumer	6			—			3
Total non-accrual loans	21,562			21,596			24,940
Overdrafts > 90 days past due	8			5			1
Total non-performing loans	21,570			21,601			24,941
Other real estate owned (“OREO”)	136			500			1,005
Total non-performing assets	$	21,706		$	22,101		$	25,946
Total Loans	$	1,447,346		$	1,359,655		$	1,290,166
Accruing TDR loans not included above	$	8,081		$	16,039		$	11,252
Delinquent loans 60-89 day past due	$	226		$	1,184		$	1,814
Non-performing loans to total loans	1.49		%	1.59		%	1.93		%
Non-performing assets to total assets	1.24		%	1.33		%	1.61		%
Loans 60-89 days past due to total loans	0.02		%	0.09		%	0.14		%
Adversely classified loans to total loans	1.90		%	2.53		%	2.89		%
Allowance for loan losses	$	25,671		$	24,254		$	23,126
Allowance for loan losses: Non-performing loans	119.01		%	112.28		%	92.72		%
Allowance for loan losses: Total loans	1.77		%	1.78		%	1.79		%

Total impaired loans amounted to $29.3 million and $37.4 million at June 30, 2013 and December 31, 2012, respectively.  Total accruing impaired loans amounted to $8.6 million and $16.6 million at June 30, 2013 and December 31, 2012, respectively, while non-accrual impaired loans amounted to $20.7 million and $20.8 million as of June 30, 2013 and December 31, 2012, respectively.  The overall decrease in impaired loans was primarily due to paydowns on several commercial relationships and upgraded commercial loans, as discussed above, partially offset by additional credit downgrades during the period.

In management’s opinion, the majority of impaired loan balances at June 30, 2013 and December 31, 2012 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 June 30, 2013, impaired loans totaling $17.5 million required no specific reserves and impaired loans totaling $11.8 million required specific reserve allocations of $4.2 million.  At December 31, 2012, impaired loans totaling $26.1 million required no specific reserves and impaired loans totaling $11.3 million required specific reserve allocations of $4.1 million.  Management closely monitors these relationships for collateral or credit deterioration.

Total TDR loans, included in the impaired loan figures above as of June 30, 2013 and December 31, 2012 were $18.9 million and $26.6 million, respectively.  TDR loans on accrual status amounted to $8.1 million and $16.0 million at June 30, 2013 and December 31, 2012, respectively. During the current quarter, a larger accruing TDR commercial real estate relationship was upgraded and removed from impaired/TDR status, as noted above. TDR loans included in non-performing loans amounted to $10.8 million and $10.5 million at June 30, 2013 and December 31, 2012, 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 carrying value of OREO at June 30, 2013 was $136 thousand and consisted of one property; two properties were added and two properties were sold during the 2013 period; there were $121 thousand in net gains realized on the sale of these OREO properties.  The carry value of OREO at December 31, 2012 and June 30, 2012 was $500 thousand and $1.0 million

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respectively. During the six months ended June 30, 2012, two properties were sold; there were gains of $45 thousand on these OREO sales.

Management believes that the loan portfolio has experienced a level of modest credit stabilization compared to the 2012 periods, as indicated by the improving statistics related to migration of adversely classified, non-accrual and impaired loans and the level of OREO properties held as of June 30, 2013. Given the size and commercial mix of the Company's loan portfolio, management considers the current statistics to be reflective of the lagging effect that the regional economic environment has had on the local commercial markets and its impact on the credit profile of such a portfolio. 

Allowance for Loan Losses

On a quarterly basis, management prepares an estimate of the allowance necessary to cover estimated 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 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, 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 “adversely classified” loans by credit rating and to non-classified loans by credit type.  The general loss allocations take into account the quantitative historic loss experience as well as the qualitative factors identified above.  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 the loan principal is unlikely.  Recoveries on loans previously charged off are credited to the allowance.

In the fourth quarter of 2012, the Company purchased a group of residential mortgage loans with a current carrying value of $17.2 million. These purchased loans conform to the Company's own underwriting standards and are generally consistent with the originated residential mortgage loan production in terms of individual loan size, credit quality and geographic region. These purchased residential loans are initially booked at fair market value and, in accordance with accounting guidance, do not carry an initial allowance for loan losses. Management will continue to closely monitor this portfolio of non classified loans for estimated credit loss under general loss allocations taking into account the loss experience as well as the quantitative and qualitative factors identified above.

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 further deterioration in the local, regional or national economic conditions could negatively impact the Company’s level of non-performing assets in the future.

The allowance for loan losses to total loans ratio was 1.77% at June 30, 2013 and 1.78% at December 31, 2012.  Based on 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 deemed adequate to absorb probable losses from specifically known and other credit risks associated with the portfolio as of June 30, 2013.

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

	Six months ended June 30,
(Dollars in thousands)	2013			2012
Balance at beginning of year	$	24,254		$	23,160
Provision charged to operations	1,317			1,350
Recoveries on charged-off loans:
Commercial real estate	61			—
Commercial and industrial	41			192
Commercial construction	50			2
Residential	128			—
Home equity	21			1
Consumer	6			3
Total recoveries	307			198
Charged-off loans
Commercial real estate	14			223
Commercial and industrial	133			1,065
Commercial construction	—			100
Residential	—			182
Home equity	44			—
Consumer	16			12
Total Charged off	207			1,582
Net loans recovered / (charged-off)	100			(1,384		)
Ending Balance	$	25,671		$	23,126
Annualized net loans recovered / (charged-off): Average loans outstanding	0.01		%	(0.22		)%

The allowance reflects management’s estimate of loan loss reserves necessary to support the level of credit risk inherent in the portfolio during the period.  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 2012 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.

	June 30, 2013				December 31, 2012				June 30, 2012
(Dollars in thousands)	Amount		Percent		Amount		Percent		Amount		Percent
Non-interest bearing demand deposits	$	407,617	25.8	%	$	386,643	26.2	%	$	367,342	25.3	%
Interest bearing checking	224,051		14.2	%	210,564		14.3	%	191,370		13.1	%
Total checking	631,668		40.0	%	597,207		40.5	%	558,712		38.4	%
Savings	162,098		10.3	%	154,680		10.5	%	164,304		11.3	%
Money markets	517,365		32.8	%	491,942		33.3	%	473,554		32.6	%
Total savings/money markets	679,463		43.1	%	646,622		43.8	%	637,858		43.9	%
Certificates of deposit	215,634		13.6	%	228,166		15.5	%	257,042		17.7	%
Total non-brokered deposits	$	1,526,765	96.7	%	$	1,471,995	99.8	%	$	1,453,612	100.0	%
Brokered deposits	52,528		3.3	%	3,032		0.2	%	—		—	%
Total deposits	$	1,579,293	100.0	%	$	1,475,027	100.0	%	$	1,453,612	100.0	%

Total deposits increased $104.3 million, or 7%, compared to December 31, 2012, and increased $125.7 million, or 9%, since June 30, 2012. This increase since December 31, 2012 was primarily comprised of increases in brokered deposits of $49.5 million, as well as increases of $34.5 million, or 6%, in checking account balances and $32.8 million, or 5%, in savings and money market account balances, partially offset by a decrease of $12.5 million in CDs. The increases in non-brokered deposits were attributed to sales and marketing efforts and general inflow of funds into the deposit marketplace.

From time to time, management utilizes brokered deposits as cost effective wholesale funding sources to support continued loan growth. Since March 31, 2013, the brokered CD balances have increased primarily resulting from loan growth exceeding deposit growth in the quarter. In addition, as part of the Company's asset-liability management strategy, during the current year, wholesale funding balances were shifted from overnight FHLB borrowings to brokered CDs with an average life of approximately five years. The brokered deposit balance at June 30, 2013 primarily represented CD balances from the offering of CDs under deposit placement agreements with select brokers.

Borrowed Funds

Borrowed funds consisted of FHLB borrowings of $1.9 million at June 30, 2013, compared to $26.5 million at December 31, 2012 and $2.9 millionJune 30, 2012, respectively. As noted above, borrowed fund balances have declined since year end as the Company has utilized brokered CDs as a strategic funding source.

At June 30, 2013, the Bank had the capacity to borrow additional funds from the FHLB of up to approximately $244.6 million and capacity to borrow from the FRB Discount window of approximately $57.7 million.

The Company also had $10.8 million of outstanding junior subordinated debentures at June 30, 2013, December 31, 2012 and June 30, 2012, respectively, in addition to the borrowed funds noted above.

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.  The Company’s liquidity policies are set and monitored by the Company’s Asset-Liability Committee of the Board of Directors.  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

47

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 June 30, 2013, 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. Brokered deposits may be comprised of overnight money market deposits and selected term CDs gathered from nationwide bank networks in increments that are covered by FDIC insurance, or term deposits brokered from large money center banks. 

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 issued junior subordinated debentures and offered shares of the Company’s common stock for sale to the general public, as most recently with the December 2009 offerings, in order to increase its liquidity.

Capital Resources

The Company believes its current capital is adequate to support ongoing operations.  As of June 30, 2013, both the Company and the Bank qualify as “well capitalized” under applicable regulations of the Federal Reserve Board and the FDIC. 

The current regulatory requirements and the Company’s actual capital amounts and ratios are presented as of June 30, 2013 in the table below.  The Bank’s capital amounts and ratios do not differ materially from the amounts and ratios presented for the Company.

	Actual				Minimum Capital for Capital Adequacy Purposes				Minimum Capital To Be Well Capitalized
(Dollars in thousands)	Amount		Ratio		Amount		Ratio		Amount		Ratio
Total Capital (to risk weighted assets)	$	165,603	11.28	%	$	117,492	8.00	%	$	146,865	10.00	%
Tier 1 Capital (to risk weighted assets)	$	146,303	9.96	%	$	58,746	4.00	%	$	88,119	6.00	%
Tier 1 Capital (to average assets) or Leverage ratio	$	146,303	8.62	%	$	67,924	4.00	%	$	84,905	5.00	%	*

__________________________________________

* This requirement is reflected in the table merely for informational purposes with respect to the Bank, and does not apply to the Company. 

Although the Company believes its current capital is adequate to support ongoing operations, on July 18, 2013, the Company filed a shelf registration of common stock, rights or preferred stock with the Securities and Exchange Commission for the flexibility to raise, over a three year period, up to $40 million in capital to ensure the Company is positioned to take advantage of future growth and market share opportunities.

The Company maintains a dividend reinvestment plan (the "DRP").  The DRP 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.  Shareholders utilized the DRP to invest $630 thousand of the $2.2 million in cash dividends paid through June 30, 2013, into 37,892 shares of the Company’s common stock.

As previously announced on July 16, 2013, the Company declared a quarterly dividend of $0.115 per share to be paid on September 3, 2013 to shareholders of record as of August 13, 2013. The quarterly dividend represents a 4.5% increase over the 2012 dividend rate.

On July 2, 2013, the Federal Reserve, and on July 9, 2013, the FDIC and OCC, adopted a final rule that implements the Basel III changes to the international regulatory capital framework and revises the U.S. risk-based and leverage capital requirements

48

for U.S. banking organizations to strengthen identified areas of weakness in the capital rules and to address relevant provisions of the Dodd-Frank Act.

The final rule establishes a stricter regulatory capital framework that requires banking organizations to hold more and higher-quality capital to act as a financial cushion to absorb losses and help banking organizations better withstand periods of financial stress. The final rule emphasizes common equity tier 1 (“CET1”) capital and implements strict eligibility criteria for regulatory capital instruments while also modifying the methodology for calculating risk-weighted assets to enhance risk sensitivity. The final rule also increases capital ratios for all banking organizations and introduces a “capital conservation buffer” which 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. More specifically, under the final rule, all banking organizations are required to maintain capital ratios including: (i) as a newly adopted international standard, a minimum ratio of CET1 to risk-weighted assets of at least 4.5%, plus a 2.5% capital conservation buffer (which is added to the 4.5% CET1 ratio as that buffer is phased in, effectively resulting in a minimum ratio of CET1 to risk-weighted assets of at least 7% upon full implementation), (ii) a minimum ratio of Tier 1 capital to risk-weighted assets of at least 6.0%, plus the capital conservation buffer (which is added to the 6.0% Tier 1 capital ratio as that buffer is phased in, effectively resulting in a minimum Tier 1 capital ratio of 8.5% upon full implementation), (iii) a minimum ratio of Total capital (that is, Tier 1 plus Tier 2) to risk-weighted assets of at least 8.0%, plus the capital conservation buffer (which is added to the 8.0% total capital ratio as that buffer is phased in, effectively resulting in a minimum total capital ratio of 10.5% upon full implementation) and (iv) a leverage ratio of 4.0%. In addition, the final rule permits banking organizations with less than $15 billion in consolidated assets as of December 31, 2009 to include in their tier 1 capital on a permanent basis trust preferred securities and cumulative perpetual preferred stock issued and included in tier 1 capital prior to May 19, 2010, without any phase out. Although community banks must generally begin complying with the final rules on January 1, 2015, management believes the Company would satisfy the higher capital ratios imposed by Basel III as of June 30, 2013.

The above BASEL III capital ratio requirements as applicable to the Bank after the full phase-in period are summarized in the table below.⁽¹⁾ 

	BASEL III Minimum for Capital Adequacy Purposes	BASEL III Additional Capital Conservation Buffer	BASEL III Ratio with Capital Conservation Buffer
Total Capital (to risk weighted assets)	8.0%	2.5%	10.5%
Tier 1 Capital (to risk weighted assets)	6.0%	2.5%	8.5%
Tier 1 Capital (to average assets) or Leverage ratio	4.0%	—%	4.0%
Common Equity Tier 1 (to risk weighted assets)	4.5%	2.5%	7.0%

__________________________________________

(1) Because the BASEL III final rules modify the methodology for calculating risk-weighted assets and the deduction and adjustment to capital, the ratios above may not be comparable to the current applicable regulatory requirements, or the Company's actual capital ratios as of June 30, 2013.

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”).  The market values of the related assets managed are affected by fluctuations in the financial markets.

Also included in the investment assets under management total are customers’ commercial sweep arrangements that are invested in third party money market mutual funds.

49

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

(Dollars in thousands)	June 30, 2013		December 31, 2012		June 30, 2012
Investment advisory and management services	$	496,675	$	480,216	$	439,783
Brokerage and management services	112,652		108,679		105,576
Total investment advisory assets	609,327		588,895		545,359
Commercial sweep accounts	3,839		3,460		6,915
Investment assets under management	$	613,166	$	592,355	$	552,274

Investment assets under management increased $20.8 million, or 4%, since December 31, 2012 and $60.9 million, or 11%, since June 30, 2012.  The increase since December 31, 2012 is attributable primarily to asset growth from market value appreciation. Since June 30, 2012, the increase is attributable to asset growth from both new business and market value appreciation.

Total assets under management, which includes total assets, investment assets under management, and loans serviced for others amounted to $2.44 billion at June 30, 2013, $2.33 billion at December 31, 2012, and $2.23 billion at June 30, 2012. 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 June 30, 2013 vs. Three Months Ended June 30, 2012

Unless otherwise indicated, the reported results are for the three months ended June 30, 2013 with the “comparable period,” and “prior period” being the three months ended June 30, 2012. Average yields are presented on a tax equivalent basis.

The Company’s second quarter 2013 net income amounted to $3.1 million compared to $2.9 million for the same period in 2012, an increase of 6%.  Diluted earnings per common share were $0.31 and $0.30 for the three months ended June 30, 2013 and June 30, 2012, respectively, an increase of 3%.

The Company's growth contributed to increases in net interest income, non-interest income and the level of operating expenses for the current year compared to the same 2012 period. Non-interest income also increased as a result of higher gains on securities sales in the current year. Additionally, the quarter ended June 30, 2013 was impacted by a lower loan loss provision compared to the same period in 2012, partially offset by the costs of our community event held in May 2013.

Net Interest Income

The Company’s net interest income for the quarter ended June 30, 2013 amounted to $16.1 million, compared to $15.4 million for the quarter ended June 30, 2012, an increase of $716 thousand, or 5%.  The increase in net interest income over the comparable period was primarily due to revenue generated from loan growthpartially offset by a decrease in tax equivalent net interest margin ("margin").

Net Interest Margin

The Company’s margin was 4.08% for the three months ended June 30, 2013 compared to 4.16% and 4.21% for the quarters ended March 31, 2013 and December 31, 2012, respectively. For the quarter ended June 30, 2012, margin was 4.31%.  Consistent with industry trends, the 2013 margin continues to trend downward, as the yield on interest earning assets has declined faster than the cost of funding, as funding rates have reached a level leaving little room for significant reductions. Interest earning asset yields declined 36 basis points compared to the prior year, while the cost of funding declined by 13 basis points over the same period.

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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 ended June 30, 2013 compared to the three months ended June 30, 2012.  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	$	425		$	2,127		$	(1,531	)	$	(171	)
Investment securities	(41		)	164			(151		)	(54		)
Other interest earning assets (1)	(13		)	(17		)	13			(9		)
Total interest earnings assets	371			2,274			(1,669		)	(234		)
Interest Expense
Interest checking, savings and money market	(194		)	58			(220		)	(32		)
Certificates of deposit	(256		)	(102		)	(188		)	34
Brokered deposits	78			—			—			78
Borrowed funds	27			167			(10		)	(130		)
Junior subordinated debentures	—			—			—			—
Total interest-bearing deposits, borrowed funds and debentures	(345		)	123			(418		)	(50		)
Change in net interest income	$	716		$	2,151		$	(1,251	)	$	(184	)

__________________________________________

(1) Other interest earning assets includes dividends on FHLB stock and income on short-term investments.

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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 June 30, 2013 and 2012.

AVERAGE BALANCES, INTEREST AND AVERAGE YIELDS

	Three Months Ended June 30, 2013						Three Months Ended June 30, 2012
(Dollars in thousands)	Average Balance		Interest		Average Yield(1)		Average Balance		Interest		Average Yield(1)
Assets:
Loans (2)	$	1,430,424	$	16,653	4.72	%	$	1,268,173	$	16,228	5.20	%
Investments (3)	179,710		794		2.34	%	155,649		835		2.73	%
Other Interest Earning Assets (4)	14,958		11		0.29	%	51,018		24		0.19	%
Total interest earnings assets	1,625,092		17,458		4.41	%	1,474,840		17,087		4.77	%
Other assets	87,777						88,197
Total assets	$	1,712,869					$	1,563,037
Liabilities and stockholders’ equity:
Int chkg, savings and money market	$	865,943	532		0.25	%	$	801,816	726		0.36	%
Certificates of deposit	219,643		386		0.70	%	260,886		642		0.99	%
Brokered deposits	29,876		78		1.04	%	—		—		—	%
Borrowed funds	41,781		40		0.38	%	2,869		13		1.72	%
Junior subordinated debentures	10,825		295		10.88	%	10,825		295		10.88	%
Total interest-bearing funding	1,168,068		1,331		0.46	%	1,076,396		1,676		0.63	%
Net interest rate spread					3.95	%					4.14	%
Demand deposits	390,341		—				344,897		—
Total deposits, borrowed funds and debentures	1,558,409		1,331		0.34	%	1,421,293		1,676		0.47	%
Other liabilities	10,841						9,788
Total liabilities	1,569,250						1,431,081
Stockholders’ equity	143,619						131,956
Total liabilities and stockholders’ equity	$	1,712,869					$	1,563,037
Net interest income			$	16,127					$	15,411
Net interest margin (tax equivalent)					4.08	%					4.31	%

(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 $423 thousand and $403 thousand for the quarters ended June 30, 2013 and June 30, 2012, respectively.

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

(3) Average investments are presented at amortized cost and include investment securities, interest-earning deposits, fed funds sold and FHLB stock.

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

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Interest and Dividend Income

For the second quarter of 2013, total interest and dividend income amounted to $17.5 million, an increase of $371 thousand, or 2%, compared to the prior period.  The increase resulted primarily from an increase of $150.3 million, or 10%, in the average balance of interest earning assets for the quarter ended June 30, 2013 compared to the second quarter of 2012, primarily in loans, partially offset by a 36 basis point decline in the yield on interest earning assets due primarily to the lower interest rate environment during the period.

Interest income on loans and loans held for sale, which accounts for the majority of interest income, amounted to $16.7 million for the quarter ended June 30, 2013, an increase of $425 thousand, or 3%, over the comparable period, due primarily to loan growth, partially offset by a decline in loan yields.  The average balances of loans and loans held for sale increased $162.3 million, or 13%, for the three months ended June 30, 2013 compared to the same period in 2012, while the average yield on these assets declined 48 basis points compared to the prior period and amounted to 4.72% for the three months ended June 30, 2013.

Income on investment securities amounted to $794 thousand, a decrease of $41 thousand, or 5% compared to the same period in 2012. This decrease primarily resulted from a decline in investment yields of 39 basis points, partially offset by an increase of $24.1 million, or 15%, in the average balance of investment securities.

Income on other interest earning assets has decreased $13 thousand compared to the same three month period in 2012 primarily resulting from a decrease in the average balance of these investments, as funds were utilized to purchase longer term investment securities and fund loan growth.

Interest Expense

For the three months ended June 30, 2013, total interest expense amounted to $1.3 million, a decrease of $345 thousand, or 21%, compared to the prior period.  The decrease resulted primarily from a 13 basis point decrease in the average cost of funding, due primarily to the reduction in deposit market interest rates over the period, partially offset by an increase in wholesale funding.

Interest expense on interest checking, savings and money market accounts amounted to $532 thousand for the quarter ended June 30, 2013, a decrease of $194 thousand, or 27%, compared to the same quarter in the prior period. The decrease primarily resulted from a decrease of 11 basis points in the average cost of these accounts, to 0.25%, partially offset by an increase in average balances of $64.1 million, or 8%, for the three months ended June 30, 2013 compared to the same period in 2012. 

Interest expense on CDs amounted to $386 thousand, a decrease of $256 thousand, or 40%, over the comparable period. The average cost of CDs decreased 29 basis points, to 0.70%, for the three months ended June 30, 2013 and the average balances decreased $41.2 million, or 16%, compared to the same prior period in 2012.

Interest expense on brokered deposits amounted to $78 thousand, an increase of $78 thousand over the comparable period. The average cost of brokered deposits amounted to 1.04%, for the three months ended June 30, 2013 and the average balances increased by $29.9 million compared to the 2012 period. The Company did not have any brokered deposits in the second quarter of 2012.

Interest expense on borrowed funds, consisting primarily of FHLB borrowings, amounted to $40 thousand for the second quarter of 2013, an increase of $27 thousand over the same period last year.  The increase was primarily attributed to an increase in average balances of approximately $38.9 million for the quarter ended June 30, 2013 compared to the same period in 2012, partially offset by a 134 basis point decline in average costs of these borrowings.  

The interest expense and average rate on junior subordinated debentures remained the same at $295 thousand and 10.88% for both the three months ended June 30, 2013 and June 30, 2012.

For the three months ended June 30, 2013, the average balance of non-interest bearing demand deposits increased $45.4 million, or 13%, as compared to the same period in 2012.  Non-interest bearing demand deposits are an important component of the Company’s core funding strategy.  This non-interest bearing funding source represented 26% and 25% of total average deposit balances for the three months ended June 30, 2013 and 2012, respectively.

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Provision for Loan Loss

The provision for loan losses amounted to $534 thousand for three months ended June 30, 2013 a decrease of $516 thousand compared to the same period last year.  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 2012 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, 2012. The provision for loan losses is a significant factor in the Company’s operating results.

Non-Interest Income

Non-interest income for the three months ended June 30, 2013 amounted to $3.6 million, an increase of $601 thousand, or 20%, as compared to the three months ended June 30, 2012.  The significant changes are discussed below.

• Net gains on security sales for the three months ended June 30, 2013 increased $356 thousand, or 318%, compared to the comparable period in 2012. Investment sales are typically driven by market or strategic opportunities.

• Investment advisory income increased $111 thousand, or 12%, compared to the same quarter in the prior period primarily due to net asset growth from new business and changes in market values due to fluctuations in the investment markets.

Non-Interest Expense

Non-interest expense for the three months ended June 30, 2013 amounted to $14.5 million, an increase of $1.5 million, or 11%, compared to the same period in 2012. The significant changes are discussed below.

• Salaries and employee benefits increased $810 thousand, or 10%.  The increase is primarily due to increased personnel costs necessary to support the Company’s strategic growth and market expansion initiatives, including annual salary and incentive adjustments, since the prior period.

• Technology and telecommunications expenses increased $126 thousand, or 12%, primarily as a result of investments to improve our service capabilities, support the Company's growth and enhance business continuity and network infrastructure.

• Advertising and public relations increased $449 thousand, or 90%, primarily as a result of our corporate community event held in May 2013 and to a lesser extent other advertising costs related to seasonal campaigns and branch expansion.

Results of Operations

Six Months Ended June 30, 2013 vs. Six Months Ended June 30, 2012

Unless otherwise indicated, the reported results are for the six months ended June 30, 2013 with the “comparable period,” “prior year” and “prior period” being the six months ended June 30, 2012. Average yields are presented on a tax equivalent basis.

The Company’s year-to-date 2013 net income amounted to $6.5 million compared to $6.1 million for the same period in 2012, an increase of $434 thousand, or 7%.  Diluted earnings per common share were $0.66 for the six months ended June 30, 2013 compared to $0.63 for the comparable 2012 period, an increase of 5%.

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The Company's growth contributed to increases in net interest income, non-interest income and the level of operating expenses for the six months ended June 30, 2013 compared to the same 2012 period. Non-interest income also increased primarily as a result of gains on securities sales.

Net Interest Income

The Company’s net interest income for the six months ended June 30, 2013 was $31.9 million compared to $30.3 million for the six months ended June 30, 2012, an increase of $1.6 million, or 5%.  The increase in net interest income over the comparable year period was primarily due to revenue generated from loan growth partially offset by a decrease in tax equivalent net interest margin. Interest earning asset yields declined 36 basis points compared to the prior year, while the cost of funding declined by 16 basis points over the same period.

Net Interest Margin

The Company’s margin was 4.12% for the six months ended June 30, 2013, compared to 4.33% in the comparable 2012 period.  Consistent with the industry, the margin continued to trend downward, as the yield on interest-earning assets declined faster than the cost of funding, as funding rates have reached a level leaving little room for significant reductions.

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 six months ended June 30, 2013 compared to the six months ended June 30, 2012.  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	$	840		$	3,925		$	(2,650	)	$	(435	)
Investment Securities	(30		)	465			(359		)	(136		)
Other Interest Earning Assets (1)	(22		)	(27		)	11			(6		)
Total interest earnings assets	788			4,363			(2,998		)	(577		)
Interest Expense
Interest checking, savings and money market	(399		)	138			(467		)	(70		)
Certificates of deposit	(561		)	(217		)	(406		)	62
Brokered deposits	85			—			—			85
Borrowed funds	57			326			(22		)	(247		)
Junior subordinated debentures	—			—			—			—
Total interest-bearing deposits, borrowed funds and debentures	(818		)	247			(895		)	(170		)
Change in net interest income	$	1,606		$	4,116		$	(2,103	)	$	(407	)

_________________________________

(1) Other interest earning assets includes dividends on FHLB stock and income on short-term investments.

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The following table presents the Company’s average balance sheet, net interest income and average rates for the six months ended June 30, 2013 and 2012. 

AVERAGE BALANCES, INTEREST AND AVERAGE YIELDS

	Six months ended June 30, 2013						Six months ended June 30, 2012
(Dollars in thousands)	Average Balance		Interest		Average Yield(1)		Average Balance		Interest		Average Yield(1)
Assets:
Loans and loans held for sale (2)	$	1,406,414	$	33,026	4.78	%	$	1,255,863	$	32,186	5.21	%
Investments (3)	179,178		1,604		2.36	%	146,530		1,634		2.85	%
Other Interest Earning Assets(4)	16,351		21		0.26	%	42,086		43		0.21	%
Total interest earnings assets	1,601,943		34,651		4.46	%	1,444,479		33,863		4.82	%
Other assets	87,309						86,363
Total assets	$	1,689,252					$	1,530,842
Liabilities and stockholders’ equity:
Int chkg, savings and money market	$	856,389	1,132		0.27	%	$	785,232	1,531		0.39	%
Certificates of deposit	222,688		813		0.74	%	264,415		1,374		1.05	%
Brokered deposits	16,528		85		1.04	%	—		—		—	%
Borrowed funds	44,653		86		0.39	%	3,594		29		1.60	%
Junior subordinated debentures	10,825		589		10.88	%	10,825		589		10.88	%
Total interest-bearing funding	1,151,083		2,705		0.47	%	1,064,066		3,523		0.67	%
Net interest rate spread					3.99	%					4.15	%
Demand deposits	384,300		—				326,012		—
Total deposits, borrowed funds and debentures	1,535,383		2,705		0.35	%	1,390,078		3,523		0.51	%
Other liabilities	11,554						10,220
Total liabilities	1,546,937						1,400,298
Stockholders’ equity	142,315						130,544
Total liabilities and stockholders’ equity	$	1,689,252					$	1,530,842
Net interest income			$	31,946					$	30,340
Net interest margin (tax equivalent)					4.12	%					4.33	%

_______________________________

(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 $841 thousand and $801 thousand for the periods ended June 30, 2013 and June 30, 2012 respectively.

(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.

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Interest and Dividend Income

Total interest and dividend income amounted to $34.7 million for the six months ended June 30, 2013, an increase of $788 thousand, or 2%, compared to the prior period.  The increase resulted primarily from an increase of $157.5 million, or 11%, in the average balance of interest earning assets, partially offset by a 36 basis point decline in the yield on interest earning assets due to the lower interest rate environment during the period.

Interest income on loans and loans held for sale, which accounts for the majority of interest income, amounted to $33.0 million, an increase of $840 thousand, or 3%, over the comparable period, due primarily to loan growth, partially offset by a decline in loan yields.  The average loans and loans held for sale balances increased $150.6 million, or 12%, compared to the prior period, while the average yield on loans and loans held for sale declined 43 basis points since the same period and amounted to 4.78% for the six months ended June 30, 2013.

Income on investment securities amounted to $1.6 million, a decrease of $30 thousand, or 2%, compared to the same period in 2012. This decrease primarily resulted from a decline in investment yields of 49 basis points, partially offset by an increase of $32.6 million, or 22%, in the average balance of investment securities.

Income on other interest earning assets has decreased $22 thousand compared to the same six month period in 2012 primarily resulting from a decrease in the average balance of these investments, as funds were utilized to purchase longer term investment securities and fund loan growth.

Interest Expense

For the six months ended June 30, 2013, total interest expense amounted to $2.7 million, a decrease of $818 thousand, or 23%, compared to the prior period.  The decrease resulted primarily from a 16 basis point decrease in the average cost of funding due to the reduction in deposit market interest rates over the period, partially offset by an increase in wholesale funding.

Interest expense on interest checking, savings and money market accounts amounted to $1.1 million for the six months ended June 30, 2013, a decrease of $399 thousand, or 26%, over the same period in the prior year, resulting primarily from a decrease in the average cost of these accounts, partially offset by an increase in average balances. The average cost of these accounts decreased 12 basis points to 0.27%, while the average balances increased $71.2 million, or 9%, compared to the prior period. 

Interest expense on CDs amounted to $813 thousand, a decrease of $561 thousand, or 41%, over the comparable period. The average cost of CDs decreased 31 basis points, to 0.74%, for the six months ended June 30, 2013, and the average balances decreased $41.7 million, or 16%, compared to the same prior period in 2012.

Interest expense on brokered deposits amounted to $85 thousand, an increase of $85 thousand over the comparable period. The Company did not have any brokered deposits in the first six months of 2012. The average cost of brokered deposits amounted to 1.04%, for the six months ended June 30, 2013 and the average balances increased by $16.5 million compared to the 2012 period.

Interest expense on borrowed funds, consisting primarily of FHLB borrowings, amounted to $86 thousand, an increase of $57 thousand compared to the same period last year.  The increase was primarily attributed to the increase in average balances of approximately $41.1 million, partially offset by a 121 basis point decrease in average costs of these borrowings.

The interest expense and average rate on junior subordinated debentures remained the same at $589 thousand and 10.88% for both the six months ended June 30, 2013 and June 30, 2012.

For the six months ended June 30, 2013, the average balance of non-interest bearing demand deposits, increased $58.3 million, or 18%, as compared to the same period in 2012.  Non-interest bearing demand deposits are an important component of the Company’s core funding strategy.  This non-interest bearing funding represented 26% and 24% of total average deposit balances for the six months ended June 30, 2013 and 2012, respectively.

Provision for Loan Loss

The provision for loan losses amounted to $1.3 million for the six months ended June 30, 2013, a decrease of $33 thousand compared to the same period last year.  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-

57

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 2012 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, 2012.  The provision for loan losses is a significant factor in the Company’s operating results.

Non-Interest Income

Non-interest income for the six months ended June 30, 2013 amounted to $7.2 million, an increase of $1.3 million, or 21%, as compared to the six months ended June 30, 2012.  The significant changes are discussed below.

• Net gains on security sales for the six months ended June 30, 2013 increased $789 thousand compared to the prior year. Investment sales are typically driven by market or strategic opportunities.

• Deposit and interchange fees increased $161 thousand, or 8%. Deposit and interchange fees primarily includes fees received on customer deposit accounts, ATM interchange income and the cost of our deposit rewards program.

• Investment advisory income increased $106 thousand, or 5%, compared to the same period in the prior year, mainly in the second quarter, primarily due to net asset growth from new business and changes in market values due to fluctuations in the investment markets.

• Net gain on loan sales increased $99 thousand, or 22%, for the six months ended June 30, 2013 when compared to the same period in 2012, and primarily resulted from the increased volume of residential loan production originated during the fourth quarter of 2012 that subsequently was sold in the first quarter of 2013.

• The increase in other income of $138 thousand, or 14%, is primarily due to increases in insurance commissions, loan fees and net gains on OREO sales, partially offset by a decrease in rental income.

Non-Interest Expense

Non-interest expense for the six months ended June 30, 2013 amounted to $27.9 million, an increase of $2.1 million, or 8%, compared to the same period in 2012.  The significant changes are discussed below.

• Salaries and employee benefits increased $1.4 million, or 9%.  The increase was primarily due to the personnel and benefit costs necessary to support the Company’s strategic growth and market expansion initiatives, including annual salary and incentive adjustments, since the prior period.

• Occupancy and equipment expenses increased $215 thousand, or 8%, mainly in the first quarter, primarily due to branch expansion and investments in maintaining our facilities.

• Technology and telecommunications expense increased $280 thousand, or 13%, primarily as a result of investments to support our strategic growth, improve our service capabilities, and enhance business continuity and network infrastructure.

• Advertising and public relations increased $280 thousand, or 22%, primarily as a result of our corporate community event held in May 2013.

• Audit, legal and other professional expenses decreased $145 thousand, or 15%, primarily due to reductions in legal and other professional costs.

58

Item 3 - Quantitative and Qualitative Disclosures About Market Risk

The Company’s primary market risk is interest rate risk.  Oversight of interest rate risk management is centered on the Asset-Liability Committee ("ALCO").  Annually, ALCO 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.  ALCO 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 ALCO 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 committee.  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, 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 in 2013 continues to trend downward as the yield on interest earning assets has declined faster than the rate on cost of funds, which is approaching a floor. Additional margin compression may occur if loans continue to re-price downward 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, 2012.  At June 30, 2013, 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.

59

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 United States Securities and Exchange Commission (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 June 30, 2013.

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 June 30, 2013) that has materially affected, or is reasonably likely to materially affect, such internal controls.

60

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. After review with legal counsel, 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, 2012.

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

The Company has not sold any equity securities that were not registered under the Securities Act of 1933, as amended, during the three months ended June 30, 2013.  Neither the Company nor any “affiliated purchaser” (as defined in the SEC’s Rule 10b-18(a)(3)) has repurchased any of the Company’s outstanding shares, nor caused any such shares to be repurchased on its behalf, during the three months ended June 30, 2013.

Item 3 - Defaults upon Senior Securities

Not Applicable

Item 4 - Mine Safety Disclosures

Not Applicable

Item 5 - Other Information

Not Applicable

61

Item 6 - Exhibits

EXHIBIT INDEX

_____________

Exhibit No.Description

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 June 30, 2013 were formatted in XBRL (eXtensible Business Reporting Language): (i) Consolidated Balance Sheets as of June 30, 2013 and December 31, 2012, (ii) Consolidated Statements of Income for the three and six months ended June 30, 2013 and 2012, (iii) Consolidated Statements of Comprehensive Income for the three and six months ended June 30, 2013 and 2012, (iv) Consolidated Statements of Changes in Equity for the six months ended June 30, 2013, (v) Consolidated Statements of Cash Flows for the six months ended June 30, 2013 and 2012 and (vi) Notes to Unaudited Consolidated Financial Statements.

____________________

*Filed herewith

62

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:	August 9, 2013	By:	/s/ James A. Marcotte
			James A. Marcotte
			Executive Vice President,
			Chief Financial Officer and Treasurer
			(Principal Financial Officer)

63

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:	August 9, 2013	/s/ John P. Clancy, Jr.
		John P. Clancy, Jr.
		Chief Executive Officer (Principal Executive Officer)

EX-31.2

EXHIBIT 31.2

CERTIFICATION OF PRINCIPAL EXECUTIVE 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:	August 9, 2013	/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 June 30, 2013, 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: August 9, 2013

/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.

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Stock-Based Compensation

6 Months Ended

Jun. 30, 2013

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

Stock-Based Compensation

Stock-Based Compensation

The Company has individual stock incentive plans and has not changed the general terms and conditions of these plans from those disclosed in the Company’s 2012 Annual Report on Form 10-K.

The Company’s stock-based compensation expense includes stock option awards and restricted stock awards to officers, other employees and directors, and stock compensation in lieu of cash fees to directors.  Total stock-based compensation expense was $520 thousand and $859 thousand for the three and six months ended June 30, 2013, respectively, compared to $334 thousand and $652 thousand for the three and six months ended June 30, 2012, respectively.

Stock Option Awards

The Company recognized stock-based compensation expense related to stock option awards of $202 thousand and $269 thousand for the three and six months ended June 30, 2013, respectively, compared to $65 thousand and $125 thousand for the three and six months ended June 30, 2012, respectively.

There were a total of 44,175 and 67,750 stock option awards granted to employees during the six months ended June 30, 2013 and 2012, respectively. Options granted in 2013 will vest 50% in year two and 50% in year four, on the anniversary date of the award. Options granted in 2012 generally vest equally over four years, 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. The 2013 options expire ten years from the date of grant and the 2012 options expire seven years from the date of grant.

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. In the case of retirement, under current Company guidelines, unvested stock options may be accelerated if the employee meets certain retirement criteria.

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, fair value, the fair value as a percentage of the market value of the stock at the date of grant and the average assumptions used in the model for the options granted in 2013 and 2012.

	Six months ended June 30,
	2013			2012
Options granted	44,175			67,750
Average assumptions used in the model:
Expected volatility	48		%	50		%
Expected dividend yield	2.99		%	2.88		%
Expected life in years	7.0			5.5
Risk-free interest rate	1.29		%	1.38		%
Market price on date of grant	$	16.43		$	16.25
Per share weighted average fair value	$	6.56		$	6.33
Fair value as a percentage of market value at grant date	40		%	39		%

Refer to Note 12 “Stock-Based Compensation Plans” in the Company’s 2012 Annual Report on Form 10-K for a further description of the assumptions used in the valuation model.

Restricted Stock Awards

Stock-based compensation expense recognized in association with restricted stock awards amounted to $264 thousand and $481 thousand for the three and six months ended June 30, 2013, respectively, compared to $211 thousand and $416 thousand for the three and six months ended June 30, 2012, respectively.

During the six months ended June 30, 2013, the Company granted 78,806 shares of common stock in the form of restricted stock awards. The awards were comprised of 24,925 shares awarded to employees generally vesting over four years in equal portions beginning on or about the first anniversary date of the award, 47,735 shares awarded to certain individuals that are performance based awards which vest upon Enterprise achieving certain predefined performance objectives and 6,146 shares awarded to directors vesting over two years in equal portions beginning on or about the first anniversary date of the award. The weighted average grant date fair value of the restricted stock awarded was $16.43 per share, the market value of the common stock on the grant dates.

During the six months ended June 30, 2012, the Company granted 71,376 shares of common stock in the form of restricted stock awards comprised of 62,160 shares awarded to employees, generally vesting over four years, 3,000 shares awarded to an executive officer vesting immediately and 6,216 shares awarded to directors vesting over two years.  The weighted average grant date fair value of the restricted stock awarded was $16.25 per share, which reflects the market value of the common stock on the grant dates. The unvested 2012 awards generally vest, in each case, in equal portions beginning on or about the first anniversary date of the award.

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.

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. In the case of retirement, under current Company guidelines, a portion of the unvested restricted shares may be accelerated if the employee meets certain retirement criteria.

Stock in Lieu of Directors’ Fees

In addition to restricted stock awards discussed above, the 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 Directors’ election to receive shares of common stock in lieu of cash fees for attendance at Board and Board committee meetings amounted to $54 thousand and $109 thousand for the three and six months ended June 30, 2013, respectively, compared to $58 thousand and $111 thousand for the three and six months ended June 30, 2012, respectively. In January 2013, directors were issued 12,592 shares of common stock in lieu of cash fees related to the 2012 annual directors’ stock-based compensation expense of $184 thousand and a market value price of $14.63 per share, the market value of the common stock on the opt-in measurement date, January 3, 2012.

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Consolidated Statements of Income (USD $) In Thousands, except Share data, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2013	Jun. 30, 2012
Interest and dividend income:
Loans and loans held for sale	$ 16,653	$ 16,228	$ 33,026	$ 32,186
Investment securities	794	835	1,604	1,634
Other interest-earning assets	11	24	21	43
Total interest and dividend income	17,458	17,087	34,651	33,863
Interest expense:
Deposits	996	1,368	2,030	2,905
Borrowed funds	40	13	86	29
Junior subordinated debentures	295	295	589	589
Total interest expense	1,331	1,676	2,705	3,523
Net interest income	16,127	15,411	31,946	30,340
Provision for loan losses	534	1,050	1,317	1,350
Net interest income after provision for loan losses	15,593	14,361	30,629	28,990
Non-interest income:
Investment advisory fees	1,045	934	2,061	1,955
Deposit and interchange fees	1,181	1,107	2,289	2,128
Income on bank-owned life insurance,net	119	128	235	262
Net gains on sales of investment securities	468	112	948	159
Gains on sales of loans	222	218	557	458
Other income	518	453	1,102	964
Total non-interest income	3,553	2,952	7,192	5,926
Non-interest expense:
Salaries and employee benefits	8,651	7,841	16,699	15,344
Occupancy and equipment expenses	1,488	1,430	3,059	2,844
Technology and telecommunications expenses	1,203	1,077	2,356	2,076
Advertising and public relations expenses	946	497	1,566	1,286
Audit, legal and other professional fees	411	487	825	970
Deposit insurance premiums	284	283	533	560
Supplies and postage expenses	250	196	487	427
Investment advisory and custodial expenses	134	112	260	209
Other operating expenses	1,094	1,049	2,130	2,074
Total non-interest expense	14,461	12,972	27,915	25,790
Income before income taxes	4,685	4,341	9,906	9,126
Provision for income taxes	1,606	1,436	3,394	3,048
Net income	$ 3,079	$ 2,905	$ 6,512	$ 6,078
Basic earnings per share	$ 0.31	$ 0.30	$ 0.67	$ 0.64
Diluted earnings per share	$ 0.31	$ 0.30	$ 0.66	$ 0.63
Basic weighted average common shares outstanding	9,825,335	9,588,420	9,770,559	9,543,994
Diluted weighted average common shares outstanding	9,889,639	9,655,728	9,840,016	9,612,187

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Critical Accounting Estimates

6 Months Ended

Jun. 30, 2013

Accounting Policies [Abstract]

Critical Accounting Estimates

Critical Accounting Estimates

As discussed in the Company’s 2012 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 2012 Annual Report on Form 10-K for significant accounting policies. The Company has not changed its significant accounting policies from those disclosed in its 2012 Annual Report filed on Form 10-K.

In preparing the consolidated 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 estimates and assumptions 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.

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Allowance For Loan Loss (Tables)

6 Months Ended

Jun. 30, 2013

Receivables [Abstract]

Financing Receivable Credit Quality Indicators

The following tables present the credit risk profile by internally assigned risk rating category at the periods indicated. 

	June 30, 2013
	Adversely Classified						Not Adversely
(Dollars in thousands)	Substandard		Doubtful		Loss		Classified		Gross Loans
Commercial real estate	$	15,253	$	—	$	—	$	770,741	$	785,994
Commercial and industrial	6,012		500		—		336,997		343,509
Commercial construction	3,685		—		—		112,663		116,348
Residential	1,380		—		—		121,324		122,704
Home equity	696		—		—		73,943		74,639
Consumer	40		—		—		5,609		5,649
Total gross loans	$	27,066	$	500	$	—	$	1,421,277	$	1,448,843

	December 31, 2012
	Adversely Classified						Not Adversely
(Dollars in thousands)	Substandard		Doubtful		Loss		Classified		Gross Loans
Commercial real estate	$	21,999	$	—	$	—	$	688,266	$	710,265
Commercial and industrial	5,993		1,460		48		321,078		328,579
Commercial construction	2,986		—		—		118,381		121,367
Residential	1,254		—		—		119,024		120,278
Home equity	661		—		—		74,987		75,648
Consumer	34		—		—		4,877		4,911
Total gross loans	$	32,927	$	1,460	$	48	$	1,326,613	$	1,361,048

Past Due Financing Receivables

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

Balance at June 30, 2013
(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	$	1,921	$	183	$	12,645	$	14,749	$	771,245	$	785,994
Commercial and industrial	449		34		5,997		6,480		337,029		343,509
Commercial construction	727		—		1,442		2,169		114,179		116,348
Residential	1,500		—		995		2,495		120,209		122,704
Home equity	85		—		477		562		74,077		74,639
Consumer	10		9		14		33		5,616		5,649
Total gross loans	$	4,692	$	226	$	21,570	$	26,488	$	1,422,355	$	1,448,843

Balance at December 31, 2012
(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	$	1,560	$	551	$	12,608	$	14,719	$	695,546	$	710,265
Commercial and industrial	472		55		6,993		7,520		321,059		328,579
Commercial construction	—		—		743		743		120,624		121,367
Residential	42		558		862		1,462		118,816		120,278
Home equity	73		9		390		472		75,176		75,648
Consumer	42		11		5		58		4,853		4,911
Total gross loans	$	2,189	$	1,184	$	21,601	$	24,974	$	1,336,074	$	1,361,048

Impaired Financing Receivables

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

Balance at June 30, 2013
(Dollars in thousands)	Unpaid contractual principal balance		Total recorded investment in impaired loans		Recorded investment with no allowance		Recorded investment with allowance		Related allowance
Commercial real estate	$	18,212	$	16,245	$	11,873	$	4,372	$	915
Commercial and industrial	10,534		9,235		4,293		4,942		2,302
Commercial construction	3,034		2,916		986		1,930		739
Residential	846		799		377		422		163
Home equity	110		109		—		109		36
Consumer	19		19		—		19		19
Total	$	32,755	$	29,323	$	17,529	$	11,794	$	4,174

Balance at December 31, 2012
(Dollars in thousands)	Unpaid contractual principal balance		Total recorded investment in impaired loans		Recorded investment with no allowance		Recorded investment with allowance		Related allowance
Commercial real estate	$	24,760	$	22,859	$	18,735	$	4,124	$	1,041
Commercial and industrial	12,184		10,831		6,016		4,815		2,186
Commercial construction	3,091		2,932		995		1,937		753
Residential	687		648		390		258		65
Home equity	110		109		—		109		87
Consumer	14		14		—		14		14
Total	$	40,846	$	37,393	$	26,136	$	11,257	$	4,146

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

	Three Months Ended June 30, 2013				Three Months Ended June 30, 2012
(Dollars in thousands)	Average recorded investment		Interest income recognized		Average recorded investment		Interest income recognized
Commercial real estate	$	17,868	$	51	$	24,378	$	186
Commercial and industrial	9,252		24		9,806		68
Commercial construction	2,906		9		2,092		(4		)
Residential	804		3		722		5
Home equity	109		—		50		(1		)
Consumer	19		—		17		—
Total	$	30,958	$	87	$	37,065	$	254

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

	Six Months Ended June 30, 2013				Six Months Ended June 30, 2012
(Dollars in thousands)	Average recorded investment		Interest income recognized		Average recorded investment		Interest income recognized
Commercial real estate	$	20,155	$	149	$	24,281	$	310
Commercial and industrial	9,427		54		10,213		86
Commercial construction	2,902		33		2,054		17
Residential	807		4		698		5
Home equity	124		—		50		—
Consumer	16		—		17		1
Total	$	33,431	$	240	$	37,313	$	419

Troubled Debt Restructurings on Financing Receivables

Troubled debt restructure agreements entered into during the three month period ended June 30, 2013

	Three months ended June 30, 2013
(Dollars in thousands)	Number of restructurings	Pre-modification outstanding recorded investment		Post-modification outstanding recorded investment
Commercial real estate	—	$	—	$	—
Commercial and industrial	1	100		62
Commercial construction	—	—		—
Residential	—	—		—
Home equity	—	—		—
Consumer	—	—		—
Total	1	$	100	$	62

Loans modified as troubled debt restructuring within the previous twelve months for which there was a subsequent payment default during the period noted are detailed below.

	Three months ended June 30, 2013
(Dollars in thousands)	Number of TDR’s that defaulted	Post-modification outstanding recorded investment
Commercial real estate	—	$	—
Commercial and industrial	—	—
Commercial construction	2	715
Residential	—	—
Home equity	—	—
Consumer	—	—
Total	2	$	715

Troubled debt restructure agreements entered into during the six month period ended June 30, 2013. 

	Six months ended June 30, 2013
(Dollars in thousands)	Number of restructurings	Pre-modification outstanding recorded investment		Post-modification outstanding recorded investment
Commercial real estate	—	$	—	$	—
Commercial and industrial	1	100		62
Commercial construction	—	—		—
Residential	—	—		—
Home equity	—	—		—
Consumer	—	—		—
Total	1	$	100	$	62

Loans modified as troubled debt restructuring within the previous twelve months for which there was a subsequent payment default during the period noted are detailed below.

	Six months ended June 30, 2013
(Dollars in thousands)	Number of TDR’s that defaulted	Post-modification outstanding recorded investment
Commercial real estate	1	$	137
Commercial and industrial	—	—
Commercial construction	3	746
Residential	—	—
Home equity	—	—
Consumer	—	—
Total	4	$	883

Troubled debt restructure agreements entered into during the three month period ended June 30, 2012. 

	Three months ended June 30, 2012
(Dollars in thousands)	Number of restructurings	Pre-modification outstanding recorded investment		Post-modification outstanding recorded investment
Commercial real estate	—	$	—	$	—
Commercial and industrial	2	16		12
Commercial construction	—	—		—
Residential	—	—		—
Home equity	—	—		—
Consumer	—	—		—
Total	2	$	16	$	12

Loans modified as troubled debt restructuring within the previous twelve months for which there was a subsequent payment default during the period noted are detailed below.

	Three months ended June 30, 2012
(Dollars in thousands)	Number of TDR's that defaulted	Post- modification outstanding recorded investment
Commercial real estate	—	$	—
Commercial and industrial	2	12
Commercial construction	—	—
Residential	—	—
Home Equity	—	—
Consumer	—	—
Total	2	$	12

Troubled debt restructure agreements entered into during six month the period ended June 30, 2012. 

	Six months ended June 30, 2012
(Dollars in thousands)	Number of restructurings	Pre-modification outstanding recorded investment		Post-modification outstanding recorded investment
Commercial real estate	—	$	—	$	—
Commercial and industrial	5	126		123
Commercial construction	—	—		—
Residential	1	130		128
Home equity	—	—		—
Consumer	—	—		—
Total	6	$	256	$	251

Loans modified as troubled debt restructuring within the previous twelve months for which there was a subsequent payment default during the period noted are detailed below.

	Six months ended June 30, 2012
(Dollars in thousands)	Number of TDR's that defaulted	Post- modification outstanding recorded investment
Commercial real estate	—	$	—
Commercial and industrial	3	17
Commercial construction	—	—
Residential	1	128
Home Equity	—	—
Consumer	—	—
Total	4	$	145

Allowance for Credit Losses on Financing Receivables

Changes in the allowance for loan losses by segment for the three months ended June 30, 2013, are presented below:

(Dollars in thousands)	Cmml Real Estate		Cmml and Industrial		Cmml Constr			Resid. Mortgage		Home Equity		Consumer		Total
Beginning Balance at March 31, 2013	$	12,359	$	7,396	$	3,486		$	975	$	672	$	128	$	25,016
Provision	614		207		(382		)	58		10		27		534
Recoveries	61		31		50			—		—		3		145
Less: Charge offs	14		1		—			—		—		9		24
Ending Balance at June 30, 2013	$	13,020	$	7,633	$	3,154		$	1,033	$	682	$	149	$	25,671

Changes in the allowance for loan losses by segment for the six months ended June 30, 2013, 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, 2012	$	11,793	$	7,297	$	3,456		$	854	$	728		$	126	$	24,254
Provision	1,180		428		(352		)	51		(23		)	33		1,317
Recoveries	61		41		50			128		21			6		307
Less: Charge offs	14		133		—			—		44			16		207
Ending Balance at June 30, 2013	$	13,020	$	7,633	$	3,154		$	1,033	$	682		$	149	$	25,671
Ending allowance balance:
Allotted to loans individually evaluated for impairment	$	915	$	2,302	$	739		$	163	$	36		$	19	$	4,174
Allotted to loans collectively evaluated for impairment	$	12,105	$	5,331	$	2,415		$	870	$	646		$	130	$	21,497

Changes in the allowance for loan losses by segment for the three months ended June 30, 2012, are presented below:

(Dollars in thousands)	Cmml Real Estate		Cmml and Industrial		Cmml Constr		Resid. Mortgage		Home Equity			Consumer		Total
Beginning Balance at March 31, 2012	$	10,598	$	7,142	$	3,196	$	827	$	764		$	80	$	22,607
Provision	622		185		133		129		(43		)	24		1,050
Recoveries	—		146		—		—		—			2		148
Less: Charge offs	223		268		—		182		—			6		679
Ending Balance at June 30, 2012	$	10,997	$	7,205	$	3,329	$	774	$	721		$	100	$	23,126

Changes in the allowance for loan losses by segment for the six months ended June 30, 2012, 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, 2011	$	10,855	$	7,568	$	3,013	$	995		$	615	$	114		$	23,160
Provision	365		510		414		(39		)	105		(5		)	1,350
Recoveries	—		192		2		—			1		3			198
Less: Charge offs	223		1,065		100		182			—		12			1,582
Ending Balance at June 30, 2012	$	10,997	$	7,205	$	3,329	$	774		$	721	$	100		$	23,126
Ending allowance balance:
Allotted to loans individually evaluated for impairment	$	819	$	2,001	$	670	$	27		$	50	$	16		$	3,583
Allotted to loans collectively evaluated for impairment	$	10,178	$	5,204	$	2,659	$	747		$	671	$	84		$	19,543

Financing Receivables by Evaluation Method for Impairment

The balances of loans as of June 30, 2013 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	$	16,245	$	769,749		$	785,994
Commercial and industrial	9,235		334,274			343,509
Commercial construction	2,916		113,432			116,348
Residential	799		121,905			122,704
Home equity	109		74,530			74,639
Consumer	19		5,630			5,649
Deferred Fees	—		(1,497		)	(1,497		)
Total loans	$	29,323	$	1,418,023		$	1,447,346

The balances of loans as of December 31, 2012 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	$	22,859	$	687,406		$	710,265
Commercial and industrial	10,831		317,748			328,579
Commercial construction	2,932		118,435			121,367
Residential	648		119,630			120,278
Home equity	109		75,539			75,648
Consumer	14		4,897			4,911
Deferred Fees	—		(1,393		)	(1,393		)
Total loans	$	37,393	$	1,322,262		$	1,359,655

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Income Taxes

6 Months Ended

Jun. 30, 2013

Income Tax Disclosure [Abstract]

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, primarily due to the impact of tax exempt interest from certain investment securities, loans and bank owned life insurance.

The Company did not have any unrecognized tax benefits accrued as income tax liabilities or receivables or as deferred tax items at June 30, 2013.  The Company is subject to U.S. federal and state income tax examinations by taxing authorities for the 2006 through 2012 tax years.

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Fair Value Measurements - Balance Sheet Grouping (Details) (USD $) In Thousands, unless otherwise specified	Jun. 30, 2013		Dec. 31, 2012
Fair Value
Financial assets:
Loans held for sale	$ 3,917	[1]	$ 8,603	[1]
Loans, net	1,450,436	[1]	1,355,893	[1]
Financial liabilities:
Borrowed funds	1,883	[1]	26,553	[1]
Junior subordinated debentures	11,592	[1]	12,597	[1]
Fair Value, Inputs, Level 1
Financial assets:
Loans held for sale	0	[1]	0	[1]
Loans, net	0	[1]	0	[1]
Financial liabilities:
Borrowed funds	0	[1]	0	[1]
Junior subordinated debentures	0	[1]	0	[1]
Fair Value, Inputs, Level 2
Financial assets:
Loans held for sale	3,917	[1]	8,603	[1]
Loans, net	0	[1]	0	[1]
Financial liabilities:
Borrowed funds	1,883	[1]	26,553	[1]
Junior subordinated debentures	0	[1]	0	[1]
Fair Value, Inputs, Level 3
Financial assets:
Loans held for sale	0	[1]	0	[1]
Loans, net	1,450,436	[1]	1,355,893	[1]
Financial liabilities:
Borrowed funds	0	[1]	0	[1]
Junior subordinated debentures	11,592	[1]	12,597	[1]
Carrying Amount
Financial assets:
Loans held for sale	3,917	[1]	8,557	[1]
Loans, net	1,421,675	[1]	1,335,401	[1]
Financial liabilities:
Borrowed funds	1,880	[1]	26,540	[1]
Junior subordinated debentures	10,825	[1]	10,825	[1]
Certificates of deposit | Fair Value
Financial liabilities:
Certificates of deposit	266,740	[1]	231,687	[1]
Certificates of deposit | Fair Value, Inputs, Level 1
Financial liabilities:
Certificates of deposit	0	[1]	0	[1]
Certificates of deposit | Fair Value, Inputs, Level 2
Financial liabilities:
Certificates of deposit	266,740	[1]	231,687	[1]
Certificates of deposit | Fair Value, Inputs, Level 3
Financial liabilities:
Certificates of deposit	0	[1]	0	[1]
Certificates of deposit | Carrying Amount
Financial liabilities:
Certificates of deposit	$ 268,162	[1]	$ 231,198	[1]

[1] Excluded from this table are certain financial instruments that approximated their fair value, 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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Allowance For Loan Loss - Troubled Debt Restructures (Details) (USD $)	3 Months Ended		6 Months Ended
	Jun. 30, 2013 restructuring	Jun. 30, 2012 restructuring	Jun. 30, 2013 restructuring	Jun. 30, 2012 restructuring	Dec. 31, 2012
Financing Receivable, Modifications [Line Items]
Total Troubled Debt Restructure (TDR) loans	$ 18,900,000		$ 18,900,000		$ 26,600,000
TDR loans on accrual status	8,100,000		8,100,000		16,000,000
TDR loans included in non-performing loans	10,800,000		10,800,000		10,500,000
Number of Restructurings	1	2	1	6
Pre-modification outstanding recorded investment	100,000	16,000	100,000	256,000
Post-modification outstanding recorded investment	62,000	12,000	62,000	251,000
Number of TDR's that defaulted	2	2	4	4
Post-modification outstanding recorded investment	715,000	12,000	883,000	145,000
Charge-offs associated with TDRs			38,000	0
Number of TDRs transferred to OREO durng the period			2
Carry value of TDRs transferred to OREO during the period			167,000
Specific reserves allocated to the TDRs	1,000	31,000	1,000	31,000
Interest payments received on nonaccruing loans excluded from income				3,000
Commercial real estate | Commercial real estate
Financing Receivable, Modifications [Line Items]
Number of Restructurings	0	0	0	0
Pre-modification outstanding recorded investment	0	0	0	0
Post-modification outstanding recorded investment	0	0	0	0
Number of TDR's that defaulted	0	0	1	0
Post-modification outstanding recorded investment	0	0	137,000	0
Commercial real estate | Commercial construction
Financing Receivable, Modifications [Line Items]
Number of Restructurings	0	0	0	0
Pre-modification outstanding recorded investment	0	0	0	0
Post-modification outstanding recorded investment	0	0	0	0
Number of TDR's that defaulted	2	0	3	0
Post-modification outstanding recorded investment	715,000	0	746,000	0
Commercial and industrial | Commercial and industrial
Financing Receivable, Modifications [Line Items]
Number of Restructurings	1	2	1	5
Pre-modification outstanding recorded investment	100,000	16,000	100,000	126,000
Post-modification outstanding recorded investment	62,000	12,000	62,000	123,000
Number of TDR's that defaulted	0	2	0	3
Post-modification outstanding recorded investment	0	12,000	0	17,000
Residential | Residential
Financing Receivable, Modifications [Line Items]
Number of Restructurings	0	0	0	1
Pre-modification outstanding recorded investment	0	0	0	130,000
Post-modification outstanding recorded investment	0	0	0	128,000
Number of TDR's that defaulted	0	0	0	1
Post-modification outstanding recorded investment	0	0	0	128,000
Residential | Home Equity
Financing Receivable, Modifications [Line Items]
Number of Restructurings	0	0	0	0
Pre-modification outstanding recorded investment	0	0	0	0
Post-modification outstanding recorded investment	0	0	0	0
Number of TDR's that defaulted	0	0	0	0
Post-modification outstanding recorded investment	0	0	0	0
Consumer | Consumer
Financing Receivable, Modifications [Line Items]
Number of Restructurings	0	0	0	0
Pre-modification outstanding recorded investment	0	0	0	0
Post-modification outstanding recorded investment	0	0	0	0
Number of TDR's that defaulted	0	0	0	0
Post-modification outstanding recorded investment	0	0	0	0
Commercial real estate | Commercial real estate
Financing Receivable, Modifications [Line Items]
Carrying amount of significant TDRs upgraded during the period			$ 6,000,000

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Earnings Per Share Earnings Per Share (Tables)

6 Months Ended

Jun. 30, 2013

Earnings Per Share [Abstract]

Schedule of Weighted Average Number of Shares

The table below presents the increase in average shares outstanding, using the treasury stock method, for the diluted earnings per share calculation for the periods indicated: 

	Three months ended June 30,		Six months ended June 30,
	2013	2012	2013	2012
Basic weighted average common shares outstanding	9,825,335	9,588,420	9,770,559	9,543,994
Dilutive shares	64,304	67,308	69,457	68,193
Diluted weighted average common shares outstanding	9,889,639	9,655,728	9,840,016	9,612,187

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Stock-Based Compensation (Tables)

6 Months Ended

Jun. 30, 2013

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, fair value, the fair value as a percentage of the market value of the stock at the date of grant and the average assumptions used in the model for the options granted in 2013 and 2012.

	Six months ended June 30,
	2013			2012
Options granted	44,175			67,750
Average assumptions used in the model:
Expected volatility	48		%	50		%
Expected dividend yield	2.99		%	2.88		%
Expected life in years	7.0			5.5
Risk-free interest rate	1.29		%	1.38		%
Market price on date of grant	$	16.43		$	16.25
Per share weighted average fair value	$	6.56		$	6.33
Fair value as a percentage of market value at grant date	40		%	39		%

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Fair Value Measurements - Quantitative (Details) (Fair Value, Inputs, Level 3, USD $) In Thousands, unless otherwise specified								6 Months Ended				6 Months Ended
	Jun. 30, 2013 Fair Value, Measurements, Recurring FHLB Stock	Dec. 31, 2012 Fair Value, Measurements, Recurring FHLB Stock	Jun. 30, 2013 Fair Value, Measurements, Recurring FHLB Stock FHLB Stated Par Value	Jun. 30, 2013 Fair Value, Measurements, Nonrecurring	Dec. 31, 2012 Fair Value, Measurements, Nonrecurring	Jun. 30, 2013 Fair Value, Measurements, Nonrecurring Impaired loans (collateral dependent) Appraisal of collateral		Jun. 30, 2013 Fair Value, Measurements, Nonrecurring Impaired loans (collateral dependent) Appraisal of collateral Minimum	Jun. 30, 2013 Fair Value, Measurements, Nonrecurring Impaired loans (collateral dependent) Appraisal of collateral Maximum	Jun. 30, 2013 Fair Value, Measurements, Nonrecurring Other real estate owned Appraisal of collateral		Jun. 30, 2013 Fair Value, Measurements, Nonrecurring Other real estate owned Appraisal of collateral Minimum	Jun. 30, 2013 Fair Value, Measurements, Nonrecurring Other real estate owned Appraisal of collateral Maximum
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Unobservable Input Value or Range								5.00%	50.00%			0.00%	30.00%
Fair value of assets	$ 4,324	$ 4,260	$ 4,324
Impaired loans (collateral dependent), Fair Value				7,540	7,110	7,540	[1]
Other real estate owned, Fair Value				$ 136	$ 500					$ 136	[1]

[1] Appraisals may be adjusted by management for qualitative factors such as economic conditions and estimated liquidation expenses.

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Loans - Loans Serving as Collateral (Details) (USD $) In Thousands, unless otherwise specified	Jun. 30, 2013	Dec. 31, 2012
Financial Instruments Owned and Pledged as Collateral [Line Items]
Loans pledged to the FHLB for borrowing capacity	$ 312,055	$ 329,539
Commercial real estate
Financial Instruments Owned and Pledged as Collateral [Line Items]
Loans pledged to the FHLB for borrowing capacity	205,210	216,080
Residential mortgages
Financial Instruments Owned and Pledged as Collateral [Line Items]
Loans pledged to the FHLB for borrowing capacity	88,836	94,552
Home equity
Financial Instruments Owned and Pledged as Collateral [Line Items]
Loans pledged to the FHLB for borrowing capacity	$ 18,009	$ 18,907

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Allowance For Loan Loss - Allowance for Loan Losses (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2013	Jun. 30, 2012	Dec. 31, 2012
Financing Receivable, Allowance for Credit Losses [Line Items]
Allowance for loan losses to total loans ratio	1.77%	1.79%	1.77%	1.79%	1.78%
Allowance for Loan and Lease Losses [Roll Forward]
Beginning Balance	$ 25,016	$ 22,607	$ 24,254	$ 23,160
Provision	534	1,050	1,317	1,350
Recoveries	145	148	307	198
Less: Charge offs	24	679	207	1,582
Ending Balance	25,671	23,126	25,671	23,126
Allotted to loans individually evaluated for impairment	4,174	3,583	4,174	3,583
Allotted to loans collectively evaluated for impairment	21,497	19,543	21,497	19,543
Loans individually evaluated for impairment	29,323		29,323		37,393
Loans collectively evaluated for impairment	1,418,023		1,418,023		1,322,262
Deferred loan origination fees, net	(1,497)		(1,497)		(1,393)
Gross loans	1,448,843		1,448,843		1,361,048
Total loans	1,447,346		1,447,346		1,359,655
Commercial real estate
Allowance for Loan and Lease Losses [Roll Forward]
Beginning Balance	12,359	10,598	11,793	10,855
Provision	614	622	1,180	365
Recoveries	61	0	61	0
Less: Charge offs	14	223	14	223
Ending Balance	13,020	10,997	13,020	10,997
Allotted to loans individually evaluated for impairment	915	819	915	819
Allotted to loans collectively evaluated for impairment	12,105	10,178	12,105	10,178
Loans individually evaluated for impairment	16,245		16,245		22,859
Loans collectively evaluated for impairment	769,749		769,749		687,406
Gross loans	785,994		785,994		710,265
Commercial and industrial
Allowance for Loan and Lease Losses [Roll Forward]
Beginning Balance	7,396	7,142	7,297	7,568
Provision	207	185	428	510
Recoveries	31	146	41	192
Less: Charge offs	1	268	133	1,065
Ending Balance	7,633	7,205	7,633	7,205
Allotted to loans individually evaluated for impairment	2,302	2,001	2,302	2,001
Allotted to loans collectively evaluated for impairment	5,331	5,204	5,331	5,204
Loans individually evaluated for impairment	9,235		9,235		10,831
Loans collectively evaluated for impairment	334,274		334,274		317,748
Gross loans	343,509		343,509		328,579
Commercial construction
Allowance for Loan and Lease Losses [Roll Forward]
Beginning Balance	3,486	3,196	3,456	3,013
Provision	(382)	133	(352)	414
Recoveries	50	0	50	2
Less: Charge offs	0	0	0	100
Ending Balance	3,154	3,329	3,154	3,329
Allotted to loans individually evaluated for impairment	739	670	739	670
Allotted to loans collectively evaluated for impairment	2,415	2,659	2,415	2,659
Loans individually evaluated for impairment	2,916		2,916		2,932
Loans collectively evaluated for impairment	113,432		113,432		118,435
Gross loans	116,348		116,348		121,367
Residential mortgages
Allowance for Loan and Lease Losses [Roll Forward]
Beginning Balance	975	827	854	995
Provision	58	129	51	(39)
Recoveries	0	0	128	0
Less: Charge offs	0	182	0	182
Ending Balance	1,033	774	1,033	774
Allotted to loans individually evaluated for impairment	163	27	163	27
Allotted to loans collectively evaluated for impairment	870	747	870	747
Loans individually evaluated for impairment	799		799		648
Loans collectively evaluated for impairment	121,905		121,905		119,630
Gross loans	122,704		122,704		120,278
Home equity
Allowance for Loan and Lease Losses [Roll Forward]
Beginning Balance	672	764	728	615
Provision	10	(43)	(23)	105
Recoveries	0	0	21	1
Less: Charge offs	0	0	44	0
Ending Balance	682	721	682	721
Allotted to loans individually evaluated for impairment	36	50	36	50
Allotted to loans collectively evaluated for impairment	646	671	646	671
Loans individually evaluated for impairment	109		109		109
Loans collectively evaluated for impairment	74,530		74,530		75,539
Gross loans	74,639		74,639		75,648
Consumer
Allowance for Loan and Lease Losses [Roll Forward]
Beginning Balance	128	80	126	114
Provision	27	24	33	(5)
Recoveries	3	2	6	3
Less: Charge offs	9	6	16	12
Ending Balance	149	100	149	100
Allotted to loans individually evaluated for impairment	19	16	19	16
Allotted to loans collectively evaluated for impairment	130	84	130	84
Loans individually evaluated for impairment	19		19		14
Loans collectively evaluated for impairment	5,630		5,630		4,897
Gross loans	5,649		5,649		4,911
Purchased Loans [Member] | Residential mortgages
Allowance for Loan and Lease Losses [Roll Forward]
Gross loans	$ 17,200		$ 17,200

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Investments Maturities (Details) (USD $)	Jun. 30, 2013
Schedule of Available-for-sale Securities [Line Items]
Callable Debt Securities, Fair Value Disclosure	$ 46,000,000
Total fixed income securities
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost, Within One Year	17,728,000
Amortized Cost, Within One Year, Yield	0.98%
Fair Value, Within One Year	17,794,000
Amortized Cost Basis, After One, But Within Five Years	67,297,000
Amortized Cost Basis, After One, But Within Five Years, Yield	1.39%
Fair Value, After One, But Within Five Years	67,696,000
Amortized Cost, After Five, But Within Ten Years	44,388,000
Amortized Cost, After Five, But Within Ten Years, Yield	3.93%
Fair Value, after Five but Within Ten Years	45,488,000
Amortized Cost Basis, After Ten Years	48,269,000
Amortized Cost after Ten Years, Yield	2.51%
Fair Value, After Ten Years	47,845,000
Federal agency obligations
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost, Within One Year	15,502,000
Amortized Cost, Within One Year, Yield	0.76%
Amortized Cost Basis, After One, But Within Five Years	49,609,000
Amortized Cost Basis, After One, But Within Five Years, Yield	0.92%
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%
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	49,000
Amortized Cost Basis, After One, But Within Five Years, Yield	1.54%
Amortized Cost, After Five, But Within Ten Years	11,150,000
Amortized Cost, After Five, But Within Ten Years, Yield	3.00%
Amortized Cost Basis, After Ten Years	41,364,000
Amortized Cost after Ten Years, Yield	1.80%
Municipal securities
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost, Within One Year	2,226,000
Amortized Cost, Within One Year, Yield	2.53%
Amortized Cost Basis, After One, But Within Five Years	15,250,000
Amortized Cost Basis, After One, But Within Five Years, Yield	2.83%
Amortized Cost, After Five, But Within Ten Years	31,841,000
Amortized Cost, After Five, But Within Ten Years, Yield	4.32%
Amortized Cost Basis, After Ten Years	6,905,000
Amortized Cost after Ten Years, Yield	6.78%
Corporate bonds
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	2,389,000
Amortized Cost Basis, After One, But Within Five Years, Yield	1.87%
Amortized Cost, After Five, But Within Ten Years	1,397,000
Amortized Cost, After Five, But Within Ten Years, Yield	2.47%
Amortized Cost Basis, After Ten Years	$ 0
Amortized Cost after Ten Years, Yield	0.00%

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Stock-Based Compensation Stock Options, Restricted Stock Awards, and Stock in Lieu of Directors' Fees (Details) (USD $) In Thousands, except Share data, unless otherwise specified	1 Months Ended	3 Months Ended		6 Months Ended			3 Months Ended		6 Months Ended		3 Months Ended		6 Months Ended								3 Months Ended		6 Months Ended		12 Months Ended	6 Months Ended
	Jan. 31, 2013	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2013	Jun. 30, 2012	Jan. 03, 2012	Jun. 30, 2013 Stock options	Jun. 30, 2012 Stock options	Jun. 30, 2013 Stock options	Jun. 30, 2012 Stock options	Jun. 30, 2013 Restricted stock awards, common stock	Jun. 30, 2012 Restricted stock awards, common stock	Jun. 30, 2013 Restricted stock awards, common stock	Jun. 30, 2012 Restricted stock awards, common stock	Jun. 30, 2013 Restricted stock awards, common stock Employee	Jun. 30, 2012 Restricted stock awards, common stock Employee	Jun. 30, 2012 Restricted stock awards, common stock Executive Officer	Jun. 30, 2013 Restricted stock awards, common stock Director	Jun. 30, 2012 Restricted stock awards, common stock Director	Jun. 30, 2013 Performance based awards	Jun. 30, 2013 Common stock in lieu of cash Director	Jun. 30, 2012 Common stock in lieu of cash Director	Jun. 30, 2013 Common stock in lieu of cash Director	Jun. 30, 2012 Common stock in lieu of cash Director	Dec. 31, 2012 Common stock in lieu of cash Director	Jun. 30, 2013 Options Granted in 2013 [Member]	Jun. 30, 2013 Options Granted in 2012 [Member]	Jun. 30, 2013 Options Granted in 2012 [Member] Stock options	Jun. 30, 2013 Year Two Stock options	Jun. 30, 2013 Year Four Stock options
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock-based compensation expense		$ 520	$ 334	$ 859	$ 652		$ 202	$ 65	$ 269	$ 125	$ 264	$ 211	$ 481	$ 416							$ 54	$ 58	$ 109	$ 111	$ 184
Stock option awards granted									44,175	67,750
Options granted, vesting percentage																													50.00%	50.00%
Award vesting period															4 years	4 years		2 years	2 years									4 years
Market price on date of grant													$ 16.43	$ 16.25
Expiration period of options																										10 years	7 years
Shares of common stock as restricted stock awards granted in period													78,806	71,376	24,925	62,160	3,000	6,146	6,216	47,735
Number of shares issued in lieu of cash to directors	12,592
Fair market share price						$ 14.63

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Supplemental Retirement Plan and Other Postretirement Benefit Obligations (Tables) (Supplemental Life Insurance Plan)

6 Months Ended

Jun. 30, 2013

Supplemental Life Insurance Plan

Defined Benefit Plan Disclosures [Line Items]

Schedule of Net Benefit Costs

The following table illustrates the net periodic post retirement benefit cost for the supplemental life insurance plans for the periods indicated:

	Three months ended June 30,				Six months ended June 30,
(Dollars in thousands)	2013		2012		2013		2012
Service Cost	$	1	$	1	$	1	$	3
Interest Cost	17		17		35		34
Net periodic post retirement benefit cost	$	18	$	18	$	36	$	37

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Consolidated Statement of Changes in Stockholders' Equity (USD $) In Thousands, unless otherwise specified	Total	Common Stock	Additional Paid-in Capital	Retained Earnings	Accumulated Other Comprehensive Income
Balance, beginning at Dec. 31, 2012	$ 139,549	$ 97	$ 48,194	$ 87,159	$ 4,099
Increase (Decrease) in Stockholders' Equity
Net income	6,512			6,512
Other comprehensive loss, net	(2,111)				(2,111)
Tax benefit from exercise of stock options	7		7
Common stock dividend paid ($0.23 per share)	(2,244)			(2,244)
Common stock issued under dividend reinvestment plan	630	0	630
Stock-based compensation	934	1	933
Stock options exercised, net	716	1	715
Balance, ending at Jun. 30, 2013	$ 143,993	$ 99	$ 50,479	$ 91,427	$ 1,988

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Consolidated Statements of Cash Flows (USD $) In Thousands, unless otherwise specified	6 Months Ended
	Jun. 30, 2013	Jun. 30, 2012
Statement of Cash Flows [Abstract]
Net income	$ 6,512	$ 6,078
Adjustments to reconcile net income to net cash provided by operating activities:
Provision for loan losses	1,317	1,350
Depreciation and amortization	2,458	2,133
Stock-based compensation expense	859	652
Mortgage loans originated for sale	(25,274)	(21,388)
Proceeds from mortgage loans sold	30,471	24,644
Net gains on sales of loans	(557)	(458)
Net gains on sales of OREO	(121)	(45)
Net gains on sales of investment securities	(948)	(159)
Income on bank-owned life insurance,net	(235)	(262)
Changes in:
Accrued interest receivable	(264)	191
Prepaid expenses and other assets	1,802	683
Accrued expenses and other liabilities	(1,319)	1,391
Accrued interest payable	(24)	(169)
Net cash provided by operating activities	14,677	14,641
Cash flows from investing activities:
Proceeds from sales of investment securities available for sale	7,361	2,921
Net proceeds (purchase) from FHLB capital stock	(64)	480
Proceeds from maturities, calls and pay-downs of investment securities	8,040	9,689
Purchase of investment securities	(19,297)	(36,874)
Net increase in loans	(87,759)	(46,522)
Additions to premises and equipment, net	(3,332)	(962)
Proceeds from OREO sales and payments	652	885
Net cash used in investing activities	(94,399)	(70,383)
Cash flows from financing activities:
Net increase in deposits	104,266	120,454
Net decrease in borrowed funds	(24,660)	(1,625)
Cash dividends paid	(2,244)	(2,098)
Proceeds from issuance of common stock	630	635
Proceeds from the exercise of stock options	716	100
Tax benefit from the exercise of stock options	7	1
Net cash provided by financing activities	78,715	117,467
Net (decrease) increase in cash and cash equivalents	(1,007)	61,725
Cash and cash equivalents at beginning of period	52,735	39,131
Cash and cash equivalents at end of period	51,728	100,856
Supplemental financial data:
Cash Paid For: Interest	2,729	3,692
Cash Paid For: Income Taxes	4,583	4,134
Supplemental schedule of non-cash investing activity:
Purchase of investment securities not yet settled	4,978	0
Transfer from loans to other real estate owned	167	400
Capital expenditures incurred not yet paid	$ 0	$ 74

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Recent Accounting Pronouncements

6 Months Ended

Jun. 30, 2013

New Accounting Pronouncements and Changes in Accounting Principles [Abstract]

Recent Accounting Pronouncements

Recent Accounting Pronouncements

In February 2013, the Financial Accounting Standards Board (“FASB”) issued ASU No. 2013-02, Comprehensive Income (Topic 220): Reporting Amounts Reclassified out of Accumulated Other Comprehensive Income.  The new amendments require an organization to present the effects on the income statement of significant amounts reclassified out of accumulated other comprehensive income or cross-reference to other disclosures currently required under GAAP for certain items. The new amended standard is effective for annual periods beginning after December 15, 2012, and interim periods within those annual periods.  As this ASU addresses only disclosure requirements, the adoption in the first quarter of 2013 did not have a material impact on the Company's financial statements. See Note 1, "Organization of Holding Company and Basis of Presentation," for the disclosure of the effects of amounts reclassified out of accumulated other comprehensive income.

In December 2011, the FASB issued ASU No. 2011-11, Balance Sheet (Topic 210): Disclosures about Offsetting Assets and Liabilities, which was subsequently clarified in January 2013 by ASU 2013-01.  The new amended standard was effective for annual periods beginning January 1, 2013, and interim periods within those annual periods.  As this ASU primarily deals with disclosure requirements and the Company has no netting arrangements, the adoption in January 2013 did not have an impact on the Company's financial statements.

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Organization of Holding Company and Basis of Presentation

6 Months Ended

Jun. 30, 2013

Accounting Policies [Abstract]

Organization of Holding Company and Basis of Presentation

Organization of Holding Company and Basis of Presentation

The accompanying unaudited consolidated financial statements and these notes should be read in conjunction with the December 31, 2012 audited consolidated financial statements and notes thereto contained in the 2012 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, 2013.  The Company has not changed its reporting policies from those disclosed in its 2012 Annual Report on Form 10-K.

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 year amounts in the unaudited consolidated interim financial statements and accompanying footnotes 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.

The Company's consolidated unaudited 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.

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, which hold various types of qualifying securities.  The security corporations are limited to conducting securities investment activities that the Bank itself would be allowed to conduct under applicable laws.

Pursuant to the Accounting Standards Codification (“ASC”) Topic 810 “Consolidation of Variable Interest Entities,” issued by the Financial Accounting Standards Board (originally issued as Financial Interpretation No. 46R) in December 2003, the Company carries 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, are excluded from the Company’s consolidated financial statements.

Comprehensive income is defined as all changes to 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. Pursuant to Accounting Standards Update (“ASU”) No. 2013-02, Comprehensive Income (Topic 220): Reporting Amounts Reclassified Out of Accumulated 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."

The Company has 21 full service branches serving the Merrimack Valley and North Central regions of Massachusetts and Southern New Hampshire. The Company is currently constructing a branch office in Nashua, NH with an anticipated opening in the fourth quarter of 2013. Through the Bank and its subsidiaries, the Company offers a range of commercial and consumer loan products, deposit and cash management products, investment advisory and wealth management, and insurance services.  The services offered through the Bank and subsidiaries are managed as one strategic unit and represent the Company’s only reportable operating segment.

The Federal Deposit Insurance Corporation (the “FDIC”) and the Massachusetts Commissioner of Banks (the “Commissioner”) 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 Commissioner also retains supervisory jurisdiction over the Company.

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Supplemental Retirement Plan and Other Postretirement Benefit Obligations (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2013	Jun. 30, 2012
Supplemental Life Insurance Plan
Defined Benefit Plan Disclosures [Line Items]
Service Cost	$ 1	$ 1	$ 1	$ 3
Defined Benefit Plan, Interest Cost	17	17	35	34
Defined Benefit Plan, Net Periodic Benefit Cost	18	18	36	37
Supplemental Retirement Plan
Defined Benefit Plan Disclosures [Line Items]
Defined Benefit Plan, Number of Active Executive Officers under Plan	2		2
Defined Benefit Plan, Number of Former Executive Officers under Plan	1		1
Term of SERP benefits			20 years
Defined Benefit Plan, Net Periodic Benefit Cost	34	38	67	76
Defined Benefit Plan, Benefits Paid	69	69	138	138
Remaining accrual for benefit obligation in current year	$ 67		$ 67

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Fair Value Measurements (Tables)

6 Months Ended

Jun. 30, 2013

Fair Value Disclosures [Abstract]

Fair Value, Assets Measured on Recurring and Nonrecurring Basis

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

	June 30, 2013		Fair Value Measurements using:
(Dollars in thousands)	Fair Value		(level 1)		(level 2)		(level 3)
Assets measured on a recurring basis:
Fixed income securities	$	179,678	$	—	$	179,678	$	—
Equity securities	10,781		10,781		—		—
FHLB Stock	4,324		—		—		4,324
Assets measured on a non-recurring basis:
Impaired loans (collateral dependent)	7,540		—		—		7,540
Other real estate owned	136		—		—		136

	December 31, 2012		Fair Value Measurements using:
(Dollars in thousands)	Fair Value		(level 1)		(level 2)		(level 3)
Assets measured on a recurring basis:
Fixed income securities	$	173,796	$	—	$	173,796	$	—
Equity securities	10,668		10,668		—		—
FHLB Stock	4,260		—		—		4,260
Assets measured on a non-recurring basis:
Impaired loans (collateral dependent)	7,110		—		—		7,110
Other real estate owned	500		—		—		500

Quantitative Information About Significant Unobservable Inputs for Fair Value Measurements

The following table presents additional quantitative information about assets measured at fair value on a recurring and non-recurring basis for which the Company utilized Level 3 inputs (significant unobservable inputs for situations in which there is little, if any, market activity for the asset or liability) to determine fair value as of June 30, 2013.

(Dollars in thousands)	Fair Value	Valuation Technique	Unobservable Input	Unobservable Input Value or Range
Assets measured on a recurring basis:
FHLB Stock	$4,324	FHLB Stated Par Value	N/A	N/A
Assets measured on a non-recurring basis:
Impaired loans (collateral dependent)	$7,540	Appraisal of collateral	Appraisal adjustments (1)	5% - 50%
Other real estate owned	$136	Appraisal of collateral	Appraisal adjustments (1)	0% - 30%

(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⁽¹⁾ for which fair value is only disclosed but not recognized on the balance sheet at the dates indicated are summarized as follows:

	June 30, 2013		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	$3,917	$3,917	$	—	$	3,917	—
Loans, net	$1,421,675	$1,450,436	$	—	$	—	1,450,436
Financial liabilities:
Certificates of deposit (including brokered)	268,162	266,740	—		266,740		—
Borrowed funds	1,880	1,883	—		1,883		—
Junior subordinated debentures	10,825	11,592	—		—		11,592

	December 31, 2012		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	$8,557	$8,603	$	—	$	8,603	—
Loans, net	$1,335,401	$1,355,893	$	—	$	—	$1,355,893
Financial liabilities:
Certificates of deposit (including brokered)	231,198	231,687	—		231,687		—
Borrowed funds	26,540	26,553	—		26,553		—
Junior subordinated debentures	10,825	12,597	—		—		12,597

(1) Excluded from this table are certain financial instruments that approximated their fair value, 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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Loans - Balance by Class of Loans (Details) (USD $) In Thousands, unless otherwise specified	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2012	Jun. 30, 2012	Mar. 31, 2012	Dec. 31, 2011
Schedule of Loans by Loan Classification [Line Items]
Gross loans	$ 1,448,843		$ 1,361,048
Deferred loan origination fees, net	(1,497)		(1,393)
Total loans	1,447,346		1,359,655
Allowance for loan losses	(25,671)	(25,016)	(24,254)	(23,126)	(22,607)	(23,160)
Net Loans	1,421,675		1,335,401
Real estate loans
Schedule of Loans by Loan Classification [Line Items]
Gross loans	1,025,046		951,910
Commercial real estate
Schedule of Loans by Loan Classification [Line Items]
Gross loans	785,994		710,265
Allowance for loan losses	(13,020)	(12,359)	(11,793)	(10,997)	(10,598)	(10,855)
Commercial construction
Schedule of Loans by Loan Classification [Line Items]
Gross loans	116,348		121,367
Allowance for loan losses	(3,154)	(3,486)	(3,456)	(3,329)	(3,196)	(3,013)
Residential mortgages
Schedule of Loans by Loan Classification [Line Items]
Gross loans	122,704		120,278
Allowance for loan losses	(1,033)	(975)	(854)	(774)	(827)	(995)
Commercial and industrial
Schedule of Loans by Loan Classification [Line Items]
Gross loans	343,509		328,579
Allowance for loan losses	(7,633)	(7,396)	(7,297)	(7,205)	(7,142)	(7,568)
Home equity
Schedule of Loans by Loan Classification [Line Items]
Gross loans	74,639		75,648
Allowance for loan losses	(682)	(672)	(728)	(721)	(764)	(615)
Consumer
Schedule of Loans by Loan Classification [Line Items]
Gross loans	5,649		4,911
Allowance for loan losses	$ (149)	$ (128)	$ (126)	$ (100)	$ (80)	$ (114)

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Allowance For Loan Loss - Impaired Loans (Details) (USD $)	3 Months Ended		6 Months Ended
	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2013	Jun. 30, 2012	Dec. 31, 2012
Financing Receivable, Impaired [Line Items]
Total recorded investment in impaired loans	$ 29,323,000		$ 29,323,000		$ 37,393,000
Total accruing impaired loans	8,600,000		8,600,000		16,600,000
Impaired non-accrual loans	20,700,000		20,700,000		20,800,000
Unpaid contractual principal balance	32,755,000		32,755,000		40,846,000
Recorded investment with no allowance	17,529,000		17,529,000		26,136,000
Recorded investment with allowance	11,794,000		11,794,000		11,257,000
Related allowance	4,174,000		4,174,000		4,146,000
Average recorded investment	30,958,000	37,065,000	33,431,000	37,313,000
Interest income recognized	87,000	254,000	240,000	419,000
Additional funding commitments on impaired loans	592,000		592,000
Commercial real estate | Commercial real estate
Financing Receivable, Impaired [Line Items]
Total recorded investment in impaired loans	16,245,000		16,245,000		22,859,000
Unpaid contractual principal balance	18,212,000		18,212,000		24,760,000
Recorded investment with no allowance	11,873,000		11,873,000		18,735,000
Recorded investment with allowance	4,372,000		4,372,000		4,124,000
Related allowance	915,000		915,000		1,041,000
Average recorded investment	17,868,000	24,378,000	20,155,000	24,281,000
Interest income recognized	51,000	186,000	149,000	310,000
Commercial real estate | Commercial construction
Financing Receivable, Impaired [Line Items]
Total recorded investment in impaired loans	2,916,000		2,916,000		2,932,000
Unpaid contractual principal balance	3,034,000		3,034,000		3,091,000
Recorded investment with no allowance	986,000		986,000		995,000
Recorded investment with allowance	1,930,000		1,930,000		1,937,000
Related allowance	739,000		739,000		753,000
Average recorded investment	2,906,000	2,092,000	2,902,000	2,054,000
Interest income recognized	9,000	(4,000)	33,000	17,000
Commercial and industrial | Commercial and industrial
Financing Receivable, Impaired [Line Items]
Total recorded investment in impaired loans	9,235,000		9,235,000		10,831,000
Unpaid contractual principal balance	10,534,000		10,534,000		12,184,000
Recorded investment with no allowance	4,293,000		4,293,000		6,016,000
Recorded investment with allowance	4,942,000		4,942,000		4,815,000
Related allowance	2,302,000		2,302,000		2,186,000
Average recorded investment	9,252,000	9,806,000	9,427,000	10,213,000
Interest income recognized	24,000	68,000	54,000	86,000
Residential | Residential
Financing Receivable, Impaired [Line Items]
Total recorded investment in impaired loans	799,000		799,000		648,000
Unpaid contractual principal balance	846,000		846,000		687,000
Recorded investment with no allowance	377,000		377,000		390,000
Recorded investment with allowance	422,000		422,000		258,000
Related allowance	163,000		163,000		65,000
Average recorded investment	804,000	722,000	807,000	698,000
Interest income recognized	3,000	5,000	4,000	5,000
Residential | Home Equity
Financing Receivable, Impaired [Line Items]
Total recorded investment in impaired loans	109,000		109,000		109,000
Unpaid contractual principal balance	110,000		110,000		110,000
Recorded investment with no allowance	0		0		0
Recorded investment with allowance	109,000		109,000		109,000
Related allowance	36,000		36,000		87,000
Average recorded investment	109,000	50,000	124,000	50,000
Interest income recognized	0	(1,000)	0	0
Consumer | Consumer
Financing Receivable, Impaired [Line Items]
Total recorded investment in impaired loans	19,000		19,000		14,000
Unpaid contractual principal balance	19,000		19,000		14,000
Recorded investment with no allowance	0		0		0
Recorded investment with allowance	19,000		19,000		14,000
Related allowance	19,000		19,000		14,000
Average recorded investment	19,000	17,000	16,000	17,000
Interest income recognized	$ 0	$ 0	$ 0	$ 1,000

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Fair Value Measurements - Recurring and Nonrecurring Basis (Details) (USD $)	6 Months Ended		12 Months Ended
	Jun. 30, 2013 property	Jun. 30, 2012	Dec. 31, 2012
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair Value, Measured on Recurring Basis, Gain (Loss) Included in Earnings	$ 0		$ 0
Specific allowance for collateral dependent impaired loans	2,700,000		3,300,000
Net decrease in allowance for collateral dependent impaired loans	592,000
Net gains on sales of OREO	121,000	45,000
Number of OREO properties sold in the current year	2
Other real estate owned
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Number of OREO properties owned	1		1
Number of OREO properties added	2
Fair Value, Measurements, Recurring | Fair Value | Fixed income securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair value of assets	179,678,000		173,796,000
Fair Value, Measurements, Recurring | Fair Value | Equity securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair value of assets	10,781,000		10,668,000
Fair Value, Measurements, Recurring | Fair Value | FHLB Stock
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair value of assets	4,324,000		4,260,000
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	10,781,000		10,668,000
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	179,678,000		173,796,000
Fair Value, Measurements, Recurring | Fair Value, Inputs, Level 3 | FHLB Stock
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair value of assets	4,324,000		4,260,000
Fair Value, Measurements, Nonrecurring | Fair Value
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Impaired loans (collateral dependent), Fair Value	7,540,000		7,110,000
Other real estate owned, Fair Value	136,000		500,000
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	7,540,000		7,110,000
Other real estate owned, Fair Value	$ 136,000		$ 500,000

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Consolidated Balance Sheets (Parenthetical) (USD $) In Thousands, except Share data, unless otherwise specified	Jun. 30, 2013	Dec. 31, 2012
Statement of Financial Position [Abstract]
Allowance for loan losses	$ 25,671	$ 24,254
Common stock, par value	$ 0.01	$ 0.01
Common stock, shares authorized	20,000,000	20,000,000
Common stock, shares issued	9,872,735	9,676,477
Common stock, shares outstanding	9,872,735	9,676,477
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	171,481	154,186

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Loans

6 Months Ended

Jun. 30, 2013

Receivables [Abstract]

Loans

Loans

Major classifications of loans at the periods indicated, are as follows:

(Dollars in thousands)	June 30, 2013			December 31, 2012
Real estate:
Commercial real estate	$	785,994		$	710,265
Commercial construction	116,348			121,367
Residential mortgages	122,704			120,278
Total real estate	1,025,046			951,910
Commercial and industrial	343,509			328,579
Home equity	74,639			75,648
Consumer	5,649			4,911
Gross loans	1,448,843			1,361,048
Deferred loan origination fees, net	(1,497		)	(1,393		)
Total loans	1,447,346			1,359,655
Allowance for loan losses	(25,671		)	(24,254		)
Net loans	$	1,421,675		$	1,335,401

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 (see Note 7, "Allowance for Loan Losses," for additional information on the Company's credit risk management).

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 property 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 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 Small Business Administration (SBA), loans under various programs issued in conjunction with the Massachusetts Development Finance Agency and other agencies.  Commercial and industrial credits may be unsecured loans and lines to financially strong borrowers, 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 the underlying real estate collateral and are generally guaranteed by the principals of the borrowers.  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, either by experienced construction lenders on staff or by independent outside inspection companies, at each construction phase, prior to advancing additional funds.  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.  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 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 the 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 the participating institution amounted to $35.5 million at June 30, 2013 and $28.6 million at December 31, 2012.

Standby letters of credit are conditional commitments issued by the Company to guarantee the financial obligation or performance by 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, vacation homes, or investment properties.  Loan to value limits vary, generally from 80% for adjustable rate and multi-family, owner occupied properties, up to 97% for fixed rate loans on 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.  All loans sold are currently sold without recourse, but are typically subject to standard secondary market underwriting and eligibility representations and warranties 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, before periodic rate adjustments begin.

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 primarily consist of secured or unsecured personal loans and overdraft protection lines on checking accounts extended to individual customers. The aggregate amount of overdrawn deposit accounts are reclassified as loan balances.

Loans serviced for others

At June 30, 2013 and December 31, 2012, the Company was servicing residential mortgage loans owned by investors amounting to $21.5 million and $22.2 million, respectively.  Additionally, the Company was servicing commercial loans participated out to various other institutions amounting to $53.9 million and $53.6 million at June 30, 2013 and December 31, 2012, 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)	June 30, 2013		December 31, 2012
Commercial real estate	$	205,210	$	216,080
Residential mortgages	88,836		94,552
Home equity	18,009		18,907
Total loans pledged to FHLB	$	312,055	$	329,539

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Consolidated Statements of Comprehensive Income (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2013	Jun. 30, 2012
Statement of Other Comprehensive Income [Abstract]
Net income	$ 3,079	$ 2,905	$ 6,512	$ 6,078
Other comprehensive (loss) income, net of taxes:
Gross unrealized holding (losses) gains on investments arising during the period	(2,744)	312	(2,386)	816
Income tax benefit (expense)	999	(117)	884	(287)
Net unrealized holding (losses) gains, net of tax	(1,745)	195	(1,502)	529
Less: Reclassification adjustment for net gains included in net income
Net realized gains on sales of securities during the period	468	112	948	159
Income tax expense	(163)	(40)	(339)	(56)
Reclassification adjustment for gains realized, net of tax	305	72	609	103
Total other comprehensive (loss) income	(2,050)	123	(2,111)	426
Comprehensive income	$ 1,029	$ 3,028	$ 4,401	$ 6,504

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Consolidated Balance Sheets (USD $) In Thousands, unless otherwise specified	Jun. 30, 2013	Dec. 31, 2012
Cash and cash equivalents:
Cash and due from banks	$ 40,795	$ 38,007
Interest-earning deposits	6,878	12,218
Fed funds sold	4,055	2,510
Total cash and cash equivalents	51,728	52,735
Investment securities at fair value	190,459	184,464
Federal Home Loan Bank Stock	4,324	4,260
Loans held for sale	3,917	8,557
Loans, less allowance for loan losses of $25,671 at June 30, 2013 and $24,254 at December 31, 2012, respectively	1,421,675	1,335,401
Premises and equipment	28,602	27,206
Accrued interest receivable	6,092	5,828
Deferred income taxes, net	13,771	12,548
Bank-owned life insurance	15,678	15,443
Prepaid income taxes	1,387	174
Prepaid expenses and other assets	10,047	13,454
Goodwill	5,656	5,656
Total assets	1,753,336	1,665,726
Liabilities
Deposits	1,579,293	1,475,027
Borrowed funds	1,880	26,540
Junior subordinated debentures	10,825	10,825
Accrued expenses and other liabilities	16,766	13,182
Accrued interest payable	579	603
Total liabilities	1,609,343	1,526,177
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; 9,872,735 issued and outstanding at June 30, 2013 (including 171,481 shares of unvested participating restricted awards) and 9,676,477 shares issued and outstanding at December 31, 2012 (including 154,186 shares of unvested participating restricted awards)	99	97
Additional paid-in-capital	50,479	48,194
Retained earnings	91,427	87,159
Accumulated other comprehensive income	1,988	4,099
Total stockholders' equity	143,993	139,549
Total liabilities and stockholders' equity	$ 1,753,336	$ 1,665,726

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Organization of Holding Company and Basis of Presentation (Details)	6 Months Ended
	Jun. 30, 2013 segment branches
Accounting Policies [Abstract]
Number of branches	21
Reportable operating segments	1

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Loans (Tables)

6 Months Ended

Jun. 30, 2013

Receivables [Abstract]

Schedule of Loans by Loan Classification

Major classifications of loans at the periods indicated, are as follows:

(Dollars in thousands)	June 30, 2013			December 31, 2012
Real estate:
Commercial real estate	$	785,994		$	710,265
Commercial construction	116,348			121,367
Residential mortgages	122,704			120,278
Total real estate	1,025,046			951,910
Commercial and industrial	343,509			328,579
Home equity	74,639			75,648
Consumer	5,649			4,911
Gross loans	1,448,843			1,361,048
Deferred loan origination fees, net	(1,497		)	(1,393		)
Total loans	1,447,346			1,359,655
Allowance for loan losses	(25,671		)	(24,254		)
Net loans	$	1,421,675		$	1,335,401

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)	June 30, 2013		December 31, 2012
Commercial real estate	$	205,210	$	216,080
Residential mortgages	88,836		94,552
Home equity	18,009		18,907
Total loans pledged to FHLB	$	312,055	$	329,539

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Earnings Per Share Earnings Per Share (Details)	3 Months Ended		6 Months Ended
	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2013	Jun. 30, 2012
Earnings Per Share, Diluted, by Common Class, Including Two Class Method [Line Items]
Basic weighted average common shares outstanding	9,825,335	9,588,420	9,770,559	9,543,994
Dilutive shares	64,304	67,308	69,457	68,193
Diluted weighted average common shares outstanding	9,889,639	9,655,728	9,840,016	9,612,187
Stock options
Earnings Per Share, Diluted, by Common Class, Including Two Class Method [Line Items]
Antidilutive securities excluded from computation of earnings per share			6,000

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Allowance For Loan Loss - Other Real Estate Owned (Details) (USD $) In Thousands, unless otherwise specified	6 Months Ended
	Jun. 30, 2013 property	Jun. 30, 2012	Dec. 31, 2012
Accounts, Notes, Loans and Financing Receivable [Line Items]
Carry value of OREO	$ 136		$ 500
Number of OREO properties sold in the current year	2
Net gains on sales of OREO	$ 121	$ 45
Other real estate owned
Accounts, Notes, Loans and Financing Receivable [Line Items]
Number of OREO properties owned	1		1
Number of OREO properties sold from prior year	1
Number of OREO properties added	2

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Allowance For Loan Loss - Adversely Classified Loans (Details) (USD $)	6 Months Ended
	Jun. 30, 2013 restructuring	Dec. 31, 2012
Financing Receivable, Recorded Investment [Line Items]
Gross loans	$ 1,448,843,000	$ 1,361,048,000
Commercial real estate | Commercial real estate
Financing Receivable, Recorded Investment [Line Items]
Significant TDR relationships that upgraded during the period	1
Carrying amount of significant TDRs upgraded during the period	6,000,000
Gross loans	785,994,000	710,265,000
Commercial and industrial | Commercial and industrial
Financing Receivable, Recorded Investment [Line Items]
Gross loans	343,509,000	328,579,000
Commercial construction | Commercial real estate
Financing Receivable, Recorded Investment [Line Items]
Gross loans	116,348,000	121,367,000
Residential | Residential
Financing Receivable, Recorded Investment [Line Items]
Gross loans	122,704,000	120,278,000
Home Equity | Residential
Financing Receivable, Recorded Investment [Line Items]
Gross loans	74,639,000	75,648,000
Consumer | Consumer
Financing Receivable, Recorded Investment [Line Items]
Gross loans	5,649,000	4,911,000
Substandard
Financing Receivable, Recorded Investment [Line Items]
Gross loans	27,066,000	32,927,000
Substandard | Commercial real estate | Commercial real estate
Financing Receivable, Recorded Investment [Line Items]
Gross loans	15,253,000	21,999,000
Substandard | Commercial and industrial | Commercial and industrial
Financing Receivable, Recorded Investment [Line Items]
Gross loans	6,012,000	5,993,000
Substandard | Commercial construction | Commercial real estate
Financing Receivable, Recorded Investment [Line Items]
Gross loans	3,685,000	2,986,000
Substandard | Residential | Residential
Financing Receivable, Recorded Investment [Line Items]
Gross loans	1,380,000	1,254,000
Substandard | Home Equity | Residential
Financing Receivable, Recorded Investment [Line Items]
Gross loans	696,000	661,000
Substandard | Consumer | Consumer
Financing Receivable, Recorded Investment [Line Items]
Gross loans	40,000	34,000
Doubtful
Financing Receivable, Recorded Investment [Line Items]
Gross loans	500,000	1,460,000
Doubtful | Commercial real estate | Commercial real estate
Financing Receivable, Recorded Investment [Line Items]
Gross loans	0	0
Doubtful | Commercial and industrial | Commercial and industrial
Financing Receivable, Recorded Investment [Line Items]
Gross loans	500,000	1,460,000
Doubtful | Commercial construction | Commercial real estate
Financing Receivable, Recorded Investment [Line Items]
Gross loans	0	0
Doubtful | Residential | Residential
Financing Receivable, Recorded Investment [Line Items]
Gross loans	0	0
Doubtful | Home Equity | Residential
Financing Receivable, Recorded Investment [Line Items]
Gross loans	0	0
Doubtful | Consumer | Consumer
Financing Receivable, Recorded Investment [Line Items]
Gross loans	0	0
Loss
Financing Receivable, Recorded Investment [Line Items]
Gross loans	0	48,000
Loss | Commercial real estate | Commercial real estate
Financing Receivable, Recorded Investment [Line Items]
Gross loans	0	0
Loss | Commercial and industrial | Commercial and industrial
Financing Receivable, Recorded Investment [Line Items]
Gross loans	0	48,000
Loss | Commercial construction | Commercial real estate
Financing Receivable, Recorded Investment [Line Items]
Gross loans	0	0
Loss | Residential | Residential
Financing Receivable, Recorded Investment [Line Items]
Gross loans	0	0
Loss | Home Equity | Residential
Financing Receivable, Recorded Investment [Line Items]
Gross loans	0	0
Loss | Consumer | Consumer
Financing Receivable, Recorded Investment [Line Items]
Gross loans	0	0
Not Adversely Classified
Financing Receivable, Recorded Investment [Line Items]
Gross loans	1,421,277,000	1,326,613,000
Not Adversely Classified | Commercial real estate | Commercial real estate
Financing Receivable, Recorded Investment [Line Items]
Gross loans	770,741,000	688,266,000
Not Adversely Classified | Commercial and industrial | Commercial and industrial
Financing Receivable, Recorded Investment [Line Items]
Gross loans	336,997,000	321,078,000
Not Adversely Classified | Commercial construction | Commercial real estate
Financing Receivable, Recorded Investment [Line Items]
Gross loans	112,663,000	118,381,000
Not Adversely Classified | Residential | Residential
Financing Receivable, Recorded Investment [Line Items]
Gross loans	121,324,000	119,024,000
Not Adversely Classified | Home Equity | Residential
Financing Receivable, Recorded Investment [Line Items]
Gross loans	73,943,000	74,987,000
Not Adversely Classified | Consumer | Consumer
Financing Receivable, Recorded Investment [Line Items]
Gross loans	$ 5,609,000	$ 4,877,000

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Allowance For Loan Loss - Past Due and Non-Accrual Loans (Details) (USD $)	6 Months Ended
	Jun. 30, 2013	Dec. 31, 2012	Jun. 30, 2012
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
Loans 30-59 Days Past Due	$ 4,692,000	$ 2,189,000
Loans 60-89 Days Past Due	226,000	1,184,000
Non-accrual loans	21,570,000	21,601,000
Total Past Due Loans	26,488,000	24,974,000
Current Loans	1,422,355,000	1,336,074,000
Gross loans	1,448,843,000	1,361,048,000
Number of days past due, majority of loans 30-59 days past due	30 days
The ratio of non-accrual loans to total loans	1.49%	1.59%	1.93%
Additional funding commitments for loans on non-accrual	592,000
Commercial real estate | Commercial real estate
Schedule of Aging of Financing Receivables [Line Items]
Loans 30-59 Days Past Due	1,921,000	1,560,000
Loans 60-89 Days Past Due	183,000	551,000
Non-accrual loans	12,645,000	12,608,000
Total Past Due Loans	14,749,000	14,719,000
Current Loans	771,245,000	695,546,000
Gross loans	785,994,000	710,265,000
Commercial real estate | Commercial construction
Schedule of Aging of Financing Receivables [Line Items]
Loans 30-59 Days Past Due	727,000	0
Loans 60-89 Days Past Due	0	0
Non-accrual loans	1,442,000	743,000
Total Past Due Loans	2,169,000	743,000
Current Loans	114,179,000	120,624,000
Gross loans	116,348,000	121,367,000
Commercial and industrial | Commercial and industrial
Schedule of Aging of Financing Receivables [Line Items]
Loans 30-59 Days Past Due	449,000	472,000
Loans 60-89 Days Past Due	34,000	55,000
Non-accrual loans	5,997,000	6,993,000
Total Past Due Loans	6,480,000	7,520,000
Current Loans	337,029,000	321,059,000
Gross loans	343,509,000	328,579,000
Residential | Residential
Schedule of Aging of Financing Receivables [Line Items]
Loans 30-59 Days Past Due	1,500,000	42,000
Loans 60-89 Days Past Due	0	558,000
Non-accrual loans	995,000	862,000
Total Past Due Loans	2,495,000	1,462,000
Current Loans	120,209,000	118,816,000
Gross loans	122,704,000	120,278,000
Residential | Home Equity
Schedule of Aging of Financing Receivables [Line Items]
Loans 30-59 Days Past Due	85,000	73,000
Loans 60-89 Days Past Due	0	9,000
Non-accrual loans	477,000	390,000
Total Past Due Loans	562,000	472,000
Current Loans	74,077,000	75,176,000
Gross loans	74,639,000	75,648,000
Consumer | Consumer
Schedule of Aging of Financing Receivables [Line Items]
Deposit liabilities reclassified as loans receivable, 90 days or more past due	8,000	5,000
Loans 30-59 Days Past Due	10,000	42,000
Loans 60-89 Days Past Due	9,000	11,000
Non-accrual loans	14,000	5,000
Total Past Due Loans	33,000	58,000
Current Loans	5,616,000	4,853,000
Gross loans	5,649,000	4,911,000
Not Adversely Classified
Schedule of Aging of Financing Receivables [Line Items]
Gross loans	1,421,277,000	1,326,613,000
Non-accrual loans not adversely classified	1,100,000	1,200,000
Not Adversely Classified | Commercial real estate | Commercial real estate
Schedule of Aging of Financing Receivables [Line Items]
Gross loans	770,741,000	688,266,000
Not Adversely Classified | Commercial real estate | Commercial construction
Schedule of Aging of Financing Receivables [Line Items]
Gross loans	112,663,000	118,381,000
Not Adversely Classified | Commercial and industrial | Commercial and industrial
Schedule of Aging of Financing Receivables [Line Items]
Gross loans	336,997,000	321,078,000
Not Adversely Classified | Residential | Residential
Schedule of Aging of Financing Receivables [Line Items]
Gross loans	121,324,000	119,024,000
Not Adversely Classified | Residential | Home Equity
Schedule of Aging of Financing Receivables [Line Items]
Gross loans	73,943,000	74,987,000
Not Adversely Classified | Consumer | Consumer
Schedule of Aging of Financing Receivables [Line Items]
Gross loans	$ 5,609,000	$ 4,877,000

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Restricted Investments

6 Months Ended

Jun. 30, 2013

Restricted Investments [Abstract]

Restricted Investments

Restricted Investments

As a member of the FHLB, the Company is required to purchase certain levels of FHLB capital stock 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.

Based on management’s ongoing review, the Company has not recorded any other-than-temporary impairment charges on this investment to date. However, if negative events or deterioration in the FHLB financial condition or capital levels occurs, the Company’s investment in FHLB capital stock may become other-than-temporarily impaired to some degree.

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Investments Available-for-sale (Details) (USD $)	Jun. 30, 2013 investments		Dec. 31, 2012
Available-for-sale Securities, Gross Unrealized Gain (Loss) [Abstract]
Carrying amount of investments	$ 190,459,000		$ 184,464,000
Number of securities in loss position	64
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value	71,600,000
Securities pledged as collateral	173,800,000
Total fixed income securities
Available-for-sale Securities, Gross Unrealized Gain (Loss) [Abstract]
Amortized cost	178,540,000		169,018,000
Unrealized gains	2,612,000		4,843,000
Unrealized losses	1,474,000		65,000
Fair Value	179,678,000		173,796,000
Federal Agency Obligations
Available-for-sale Securities, Gross Unrealized Gain (Loss) [Abstract]
Amortized cost	65,111,000	[1]	65,247,000	[1]
Unrealized gains	191,000	[1]	438,000	[1]
Unrealized losses	50,000	[1]	0	[1]
Fair Value	65,252,000	[1]	65,685,000	[1]
Federal Agency mortgage backed securities (MBS)
Available-for-sale Securities, Gross Unrealized Gain (Loss) [Abstract]
Amortized cost	52,563,000	[1]	48,429,000	[1]
Unrealized gains	570,000	[1]	1,287,000	[1]
Unrealized losses	976,000	[1]	42,000	[1]
Fair Value	52,157,000	[1]	49,674,000	[1]
Collateralized Mortgage Obligations (CMOs)
Available-for-sale Securities, Gross Unrealized Gain (Loss) [Abstract]
Carrying amount of investments	20,600,000		23,600,000
Municipal securities
Available-for-sale Securities, Gross Unrealized Gain (Loss) [Abstract]
Amortized cost	56,222,000		53,437,000
Unrealized gains	1,847,000		3,103,000
Unrealized losses	391,000		17,000
Fair Value	57,678,000		56,523,000
Corporate bonds
Available-for-sale Securities, Gross Unrealized Gain (Loss) [Abstract]
Amortized cost	3,786,000		1,905,000
Unrealized gains	4,000		15,000
Unrealized losses	54,000		6,000
Fair Value	3,736,000		1,914,000
Certificates of deposit
Available-for-sale Securities, Gross Unrealized Gain (Loss) [Abstract]
Amortized cost	858,000
Unrealized gains	0
Unrealized losses	3,000
Fair Value	855,000
Equity investments
Available-for-sale Securities, Gross Unrealized Gain (Loss) [Abstract]
Amortized cost	8,886,000		9,080,000
Unrealized gains	2,020,000		1,622,000
Unrealized losses	125,000		34,000
Fair Value	10,781,000		10,668,000
Percent of portfolio invested in financial services	17.00%
Total available for sale securities, at fair value
Available-for-sale Securities, Gross Unrealized Gain (Loss) [Abstract]
Amortized cost	187,426,000		178,098,000
Unrealized gains	4,632,000		6,465,000
Unrealized losses	1,599,000		99,000
Fair Value	$ 190,459,000		$ 184,464,000

[1] These categories may include investments issued or guaranteed by government sponsored enterprises such as Fannie Mae (FNMA), Freddie Mac (FHLMC), Ginnie Mae (GNMA), Federal Farm Credit Bank, or one of several Federal Home Loan Banks. All agency MBS/Collateralized Mortgage Obligations ("CMOs") investments owned by the Company are backed by residential mortgages.

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Stock-Based Compensation Summary Information for Options Granted (Details) (Stock options, USD $)	6 Months Ended
	Jun. 30, 2013	Jun. 30, 2012
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock option awards granted	44,175	67,750
Expected volatility	48.00%	50.00%
Market price on date of grant	$ 16.43	$ 16.25
Per share weighted average fair value	$ 6.56	$ 6.33
Weighted Average
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Expected dividend yield	2.99%	2.88%
Expected life in years	7 years	5 years 6 months
Risk-free interest rate	1.29%	1.38%
Fair Value as a percentage of market value at grant date	40.00%	39.00%

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Supplemental Retirement Plan and Other Postretirement Benefit Obligations

6 Months Ended

Jun. 30, 2013

Compensation and Retirement Disclosure [Abstract]

Supplemental Retirement Plan and Other Postretirement Benefit Obligations

Supplemental Retirement Plan and Other Postretirement Benefit Obligations

Supplemental Retirement Plan (SERPs)

The Company has salary continuation agreements with two of its active executive officers, and one former executive officer who currently works on a part time basis. 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 Company has not recognized service cost 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 in exchange for the employee’s service rendered to that date.  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 cost, which was comprised of interest cost only, was $34 thousand for the three months ended June 30, 2013 compared to $38 thousand for the three months ended June 30, 2012, and $67 thousand for the six months ended June 30, 2013 compared to $76 thousand for the six months ended June 30, 2012.

Benefits paid amounted to $69 thousand and $138 thousand for both the three and six months ended June 30, 2013 and June 30, 2012, respectively. The Company anticipates accruing an additional $67 thousand to the plan during the remainder of 2013.

Supplemental Life Insurance

For certain senior and executive officers on whom the Bank owns bank owned life insurance ("BOLI"), the Company has provided supplemental life insurance which provides a death benefit to the officer’s designated beneficiaries.

The Company has recognized a liability for future benefits associated with an endorsement split-dollar life insurance arrangement that provides a benefit to an employee that extends to postretirement periods.

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 Postretirement Benefit Obligation,” which is the present value of the post retirement benefits associated with this arrangement.

The following table illustrates the net periodic post retirement benefit cost for the supplemental life insurance plans for the periods indicated:

	Three months ended June 30,				Six months ended June 30,
(Dollars in thousands)	2013		2012		2013		2012
Service Cost	$	1	$	1	$	1	$	3
Interest Cost	17		17		35		34
Net periodic post retirement benefit cost	$	18	$	18	$	36	$	37

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Investments

6 Months Ended

Jun. 30, 2013

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:

	June 30, 2013
(Dollars in thousands)	Amortized cost		Unrealized gains		Unrealized losses		Fair Value
Federal agency obligations (1)	$	65,111	$	191	$	50	$	65,252
Federal agency mortgage backed securities (MBS) (1)	52,563		570		976		52,157
Municipal securities	56,222		1,847		391		57,678
Corporate bonds	3,786		4		54		3,736
Certificates of deposit	858		—		3		855
Total fixed income securities	178,540		2,612		1,474		179,678
Equity investments	8,886		2,020		125		10,781
Total available for sale securities, at fair value	$	187,426	$	4,632	$	1,599	$	190,459

	December 31, 2012
(Dollars in thousands)	Amortized cost		Unrealized gains		Unrealized losses		Fair Value
Federal agency obligations(1)	$	65,247	$	438	$	—	$	65,685
Federal agency mortgage backed securities (MBS) (1)	48,429		1,287		42		49,674
Municipal securities	53,437		3,103		17		56,523
Corporate bonds	1,905		15		6		1,914
Total fixed income securities	169,018		4,843		65		173,796
Equity investments	9,080		1,622		34		10,668
Total available for sale securities, at fair value	$	178,098	$	6,465	$	99	$	184,464

__________________________________________

(1) These categories may include investments issued or guaranteed by government sponsored enterprises such as Fannie Mae (FNMA), Freddie Mac (FHLMC), Ginnie Mae (GNMA), Federal Farm Credit Bank, or one of several Federal Home Loan Banks.  All agency MBS/Collateralized Mortgage Obligations ("CMOs") investments owned by the Company are backed by residential mortgages.

Included in the carrying amount of the federal agency MBS category were CMOs totaling $20.6 million and $23.6 million at June 30, 2013 and December 31, 2012, respectively.

Certificates of Deposit (CDs) represent term deposits issued by banks that are subject to FDIC insurance and purchased on the open market. The Company utilizes these CDs as an alternative investment option to holding short-term excess cash in lower yielding overnight deposit accounts. These securities have maturities of less than a year and the market value approximates the carrying value.

At June 30, 2013, the equity portfolio consisted primarily of investments in a diversified group of mutual funds, with a small portion of the portfolio (approximately 17%) invested in exchange traded funds or individual common stock of entities in the financial services industry.

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 the fixed income portfolio is deemed to be other than temporary, the credit loss portion is charged to earnings and the noncredit portion is recognized in accumulated other comprehensive income. 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 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 six months ended June 30, 2013 and 2012, the Company did not record any fair value impairment charges on its investments. As of June 30, 2013, there were a total of 64 investments (fixed income and equity, excluding CDs), with a fair market value of $71.6 million, in an unrealized loss position totaling $1.6 million. The Company attributes these unrealized losses to increases in current market yields since the date the underlying securities were purchased and does not consider these investments to be other-than-temporarily impaired at June 30, 2013, because 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 because 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 MBS investments and Federal Agency obligations, the contractual cash flows of these investments are guaranteed by an agency of the U.S. Government, and the agency that issued these securities is sponsored by the U.S. Government. 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 investment's materiality, and duration of the 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. At June 30, 2013 the Company's corporate and municipal bond portfolios did not contain any securities below investment grade, as reported by major credit rating agencies. For equities and funds, management's assessment includes the severity of the declines, whether it is unlikely that the security or fund will completely recover its unrealized loss within a reasonable time period and if the equity security or fund exhibits fundamental deterioration.

The small portion of the portfolio invested in short-term CDs was also in an unrealized loss position at June 30, 2013 due to market rates. The unrealized loss was not considered to be material and the securities are expected to be settled at par value at maturity.

The contractual maturity distribution at June 30, 2013 of total fixed income investments, excluding CDs which mature in less than one year, is 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	$	15,502	0.76	%	$	49,609	0.92	%	$	—	—	%	$	—	—	%
MBS	—		—	%	49		1.54	%	11,150		3.00	%	41,364		1.80	%
Municipal securities	2,226		2.53	%	15,250		2.83	%	31,841		4.32	%	6,905		6.78	%
Corporate bonds	—		—	%	2,389		1.87	%	1,397		2.47	%	—		—	%
Total fixed income securities	$	17,728	0.98	%	$	67,297	1.39	%	$	44,388	3.93	%	$	48,269	2.51	%
At fair value:
Total fixed income securities	$	17,794			$	67,696			$	45,488			$	47,845

Scheduled contractual maturities may not reflect the actual maturities of the investments. MBS/CMOs are shown at their final maturity. However, due to prepayments and amortization the actual MBS/CMO cash flows may be faster than presented above. Similarly, included in the carrying value of fixed income investments above are callable securities, comprised of municipal securities, federal agency obligations and corporate bonds totaling $46.0 million, which can be redeemed by the issuer prior to the maturity presented above.  Management considers these factors when evaluating the net interest margin in the Company’s asset-liability management program.

See Note 12, “Fair Value Measurements” below for further information regarding the Company’s fair value measurements for available-for-sale securities.

From time to time the Company may pledge securities as collateral against deposit account balances of municipal deposit customers, for Federal Home Loan Bank of Boston ("FHLB") borrowing capacity and as collateral for borrowing from the Federal Reserve Bank of Boston ("FRB").  The fair value of securities pledged as collateral for these purposes was $173.8 million at June 30, 2013.

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Consolidated Statement of Changes in Stockholders' Equity (Parenthetical) (USD $)	6 Months Ended
	Jun. 30, 2013
Statement of Stockholders' Equity [Abstract]
Common stock dividend paid, per share	$ 0.23

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Fair Value Measurements - Other Guarantees and Commitments (Details) (Financial Standby Letter of Credit)	6 Months Ended
	Jun. 30, 2013
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

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Loans - Loan Categories Narrative (Details) (USD $) In Millions, unless otherwise specified	6 Months Ended
	Jun. 30, 2013 payment	Dec. 31, 2012
Schedule of Loans by Loan Classification [Line Items]
Early Payment Default Period	4
Participation loans amount	$ 35.5	$ 28.6
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 mortgages
Schedule of Loans by Loan Classification [Line Items]
Amount of loans serviced for others	21.5	22.2
Residential mortgages | Maximum
Schedule of Loans by Loan Classification [Line Items]
Repayment period, term of loan	30 years
Adjustable rate mortgage | Minimum
Schedule of Loans by Loan Classification [Line Items]
Loan-to-value ratio	80.00%
Fixed rate residential mortgage | Maximum
Schedule of Loans by Loan Classification [Line Items]
Loan-to-value ratio	97.00%
Home equity | Maximum
Schedule of Loans by Loan Classification [Line Items]
Loan-to-value ratio	80.00%
Home Equity Line 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
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
Commercial loans
Schedule of Loans by Loan Classification [Line Items]
Participations loans sold that are still serviced amount	$ 53.9	$ 53.6

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Earnings Per Share

6 Months Ended

Jun. 30, 2013

Earnings Per Share [Abstract]

Earnings Per Share

Earnings per share

Basic earnings per share are calculated by dividing net income 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 June 30,		Six months ended June 30,
	2013	2012	2013	2012
Basic weighted average common shares outstanding	9,825,335	9,588,420	9,770,559	9,543,994
Dilutive shares	64,304	67,308	69,457	68,193
Diluted weighted average common shares outstanding	9,889,639	9,655,728	9,840,016	9,612,187

For the six months ended June 30, 2013, there were an additional 6,000 average stock options outstanding, which were excluded from the year-to-date calculation of diluted earnings per share due to the exercise price of these options exceeding the average market price of the Company’s common stock for the period.  These options, which were not dilutive at that date, may potentially dilute earnings per share in the future.

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Allowance For Loan Loss

6 Months Ended

Jun. 30, 2013

Receivables [Abstract]

Allowance for Loan Losses and Loan Credit Quality [Text Block]

Allowance for Loan Loss

The Company manages its loan portfolio to avoid concentration by industry and loan size to minimize its credit risk exposure. In addition, the Company does not have a “sub-prime” mortgage program.  However, inherent in the lending process is the risk of loss due to customer non-payment, or “credit risk.” While the Company endeavors to minimize this risk through the credit 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.

Credit Quality Indicators

The level of adversely classified loans, delinquent and non-performing assets is largely a function of economic conditions, the overall banking environment, and the Company's underwriting, and credit risk management standards. The Company’s commercial lending focus may entail significant additional risks compared to long term financing on existing, owner-occupied residential real estate.  The Company endeavors to minimize this risk through sound underwriting practices and the risk management function. 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 individual loans, adversely classified loans, past due and non-accrual loans, impaired and restructured loans, and the level of foreclosure activity. 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.

The loan portfolio continued to show improving statistics related to migration of adversely classified, non-accrual, impaired loans and the level of Other Real Estate Owned ('"OREO") properties held during the quarter ended June 30, 2013. However, management believes that the credit profile of the portfolio will continue to be affected by lagging effects that the economic environment has had on the regional and local commercial markets.

- 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, to 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 the 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 guaranties; credit weaknesses are well-defined; 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 liquidation in full, 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 credit risk profile by internally assigned risk rating category at the periods indicated. 

	June 30, 2013
	Adversely Classified						Not Adversely
(Dollars in thousands)	Substandard		Doubtful		Loss		Classified		Gross Loans
Commercial real estate	$	15,253	$	—	$	—	$	770,741	$	785,994
Commercial and industrial	6,012		500		—		336,997		343,509
Commercial construction	3,685		—		—		112,663		116,348
Residential	1,380		—		—		121,324		122,704
Home equity	696		—		—		73,943		74,639
Consumer	40		—		—		5,609		5,649
Total gross loans	$	27,066	$	500	$	—	$	1,421,277	$	1,448,843

	December 31, 2012
	Adversely Classified						Not Adversely
(Dollars in thousands)	Substandard		Doubtful		Loss		Classified		Gross Loans
Commercial real estate	$	21,999	$	—	$	—	$	688,266	$	710,265
Commercial and industrial	5,993		1,460		48		321,078		328,579
Commercial construction	2,986		—		—		118,381		121,367
Residential	1,254		—		—		119,024		120,278
Home equity	661		—		—		74,987		75,648
Consumer	34		—		—		4,877		4,911
Total gross loans	$	32,927	$	1,460	$	48	$	1,326,613	$	1,361,048

The decrease in adversely classified loans since the prior period was due primarily to paydowns on several commercial relationships, and upgraded commercial loans, in particular one larger commercial real estate relationship of approximately $6.0 million classified as accruing/impaired/Troubled Debt Restructure (or "TDR") at December 31, 2012 which was upgraded during the period, due to the borrower’s improved financial condition and sustained performance over time, 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 loans.  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 and when, in the judgment of management, the 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. Additionally, deposit accounts overdrawn for 90 or more days are included in the consumer non-accrual numbers below.

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

Balance at June 30, 2013
(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	$	1,921	$	183	$	12,645	$	14,749	$	771,245	$	785,994
Commercial and industrial	449		34		5,997		6,480		337,029		343,509
Commercial construction	727		—		1,442		2,169		114,179		116,348
Residential	1,500		—		995		2,495		120,209		122,704
Home equity	85		—		477		562		74,077		74,639
Consumer	10		9		14		33		5,616		5,649
Total gross loans	$	4,692	$	226	$	21,570	$	26,488	$	1,422,355	$	1,448,843

Balance at December 31, 2012
(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	$	1,560	$	551	$	12,608	$	14,719	$	695,546	$	710,265
Commercial and industrial	472		55		6,993		7,520		321,059		328,579
Commercial construction	—		—		743		743		120,624		121,367
Residential	42		558		862		1,462		118,816		120,278
Home equity	73		9		390		472		75,176		75,648
Consumer	42		11		5		58		4,853		4,911
Total gross loans	$	2,189	$	1,184	$	21,601	$	24,974	$	1,336,074	$	1,361,048

At June 30, 2013 and December 31, 2012, all loans 90 or more days past due were carried as non-accruing. Included in the consumer non-accrual numbers in the table above were $8 thousand and $5 thousand of overdraft deposit account balances 90 days or more past due at June 30, 2013 and December 31, 2012, respectively. Total non-performing loans amounted to $21.6 million at both June 30, 2013 and December 31, 2012. Non-accrual loans which were not adversely classified amounted to $1.1 million at June 30, 2013 and $1.2 million at December 31, 2012. These balances primarily represented the guaranteed portions of non-performing Small Business Administration 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 increase in loans 30-59 days past due occurred primarily within the residential portfolio, due to a single large balance mortgage which was subsequently brought current, and in the commercial real estate and construction portfolios, with the majority of these loans just 30 days overdue at June 30, 2013.

The ratio of non-accrual loans to total loans amounted to 1.49% at June 30, 2013, 1.59% at December 31, 2012, and 1.93% at June 30, 2012.

At June 30, 2013, additional funding commitments for loans on non-accrual status totaled $592 thousand. 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 be made at the Company’s discretion.

- 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 in non-accrual status has been designated as impaired.  Impaired loans include loans that have been modified in a troubled debt restructuring (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 credit loss.  Refer to heading “Allowance for probable loan losses methodology” contained in Note 5 “Allowance For Loan Losses,” to the Company’s consolidated financial statements contained in the Company’s 2012 Annual Report on Form 10-K for further discussion of management’s methodology used to estimate specific reserves for impaired loans.

Total impaired loans amounted to $29.3 million and $37.4 million, at June 30, 2013 and December 31, 2012, respectively.  Total accruing impaired loans amounted to $8.6 million and $16.6 million at June 30, 2013 and December 31, 2012, respectively, while non-accrual impaired loans amounted to $20.7 million and $20.8 million as of June 30, 2013 and December 31, 2012, respectively.  The decrease was primarily due to the changes discussed above under the heading "Adversely Classified Loans."

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

Balance at June 30, 2013
(Dollars in thousands)	Unpaid contractual principal balance		Total recorded investment in impaired loans		Recorded investment with no allowance		Recorded investment with allowance		Related allowance
Commercial real estate	$	18,212	$	16,245	$	11,873	$	4,372	$	915
Commercial and industrial	10,534		9,235		4,293		4,942		2,302
Commercial construction	3,034		2,916		986		1,930		739
Residential	846		799		377		422		163
Home equity	110		109		—		109		36
Consumer	19		19		—		19		19
Total	$	32,755	$	29,323	$	17,529	$	11,794	$	4,174

Balance at December 31, 2012
(Dollars in thousands)	Unpaid contractual principal balance		Total recorded investment in impaired loans		Recorded investment with no allowance		Recorded investment with allowance		Related allowance
Commercial real estate	$	24,760	$	22,859	$	18,735	$	4,124	$	1,041
Commercial and industrial	12,184		10,831		6,016		4,815		2,186
Commercial construction	3,091		2,932		995		1,937		753
Residential	687		648		390		258		65
Home equity	110		109		—		109		87
Consumer	14		14		—		14		14
Total	$	40,846	$	37,393	$	26,136	$	11,257	$	4,146

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

	Three Months Ended June 30, 2013				Three Months Ended June 30, 2012
(Dollars in thousands)	Average recorded investment		Interest income recognized		Average recorded investment		Interest income recognized
Commercial real estate	$	17,868	$	51	$	24,378	$	186
Commercial and industrial	9,252		24		9,806		68
Commercial construction	2,906		9		2,092		(4		)
Residential	804		3		722		5
Home equity	109		—		50		(1		)
Consumer	19		—		17		—
Total	$	30,958	$	87	$	37,065	$	254

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

	Six Months Ended June 30, 2013				Six Months Ended June 30, 2012
(Dollars in thousands)	Average recorded investment		Interest income recognized		Average recorded investment		Interest income recognized
Commercial real estate	$	20,155	$	149	$	24,281	$	310
Commercial and industrial	9,427		54		10,213		86
Commercial construction	2,902		33		2,054		17
Residential	807		4		698		5
Home equity	124		—		50		—
Consumer	16		—		17		1
Total	$	33,431	$	240	$	37,313	$	419

At June 30, 2013, additional funding commitments for impaired loans totaled $592 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 be made at the Company's discretion.

- Troubled Debt Restructures

Loans are designated as a TDR when, as part of an agreement to modify the original contractual terms of the loan, the Bank grants a concession on the terms, that would not otherwise be considered, as a result of financial difficulties of the borrower.  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 credit loss. 

Total TDR loans, included in the impaired loan figures above as of June 30, 2013 and December 31, 2012 were $18.9 million and $26.6 million, respectively.

TDR loans on accrual status amounted to $8.1 million and $16.0 million at June 30, 2013 and December 31, 2012, respectively. During the current quarter, an accruing TDR commercial real estate relationship of approximately $6.0 million was upgraded and removed from impaired/TDR status, due to the borrower’s improved financial condition and sustained performance over time. TDR loans included in non-performing loans amounted to $10.8 million and $10.5 million at June 30, 2013 and December 31, 2012, respectively. The Company continues to work with commercial relationships and enters into loan modifications to the extent deemed to be necessary or appropriate to ensure the best mutual outcome given the current economic environment.

Troubled debt restructure agreements entered into during the three month period ended June 30, 2013

	Three months ended June 30, 2013
(Dollars in thousands)	Number of restructurings	Pre-modification outstanding recorded investment		Post-modification outstanding recorded investment
Commercial real estate	—	$	—	$	—
Commercial and industrial	1	100		62
Commercial construction	—	—		—
Residential	—	—		—
Home equity	—	—		—
Consumer	—	—		—
Total	1	$	100	$	62

Loans modified as troubled debt restructuring within the previous twelve months for which there was a subsequent payment default during the period noted are detailed below.

	Three months ended June 30, 2013
(Dollars in thousands)	Number of TDR’s that defaulted	Post-modification outstanding recorded investment
Commercial real estate	—	$	—
Commercial and industrial	—	—
Commercial construction	2	715
Residential	—	—
Home equity	—	—
Consumer	—	—
Total	2	$	715

Troubled debt restructure agreements entered into during the six month period ended June 30, 2013. 

	Six months ended June 30, 2013
(Dollars in thousands)	Number of restructurings	Pre-modification outstanding recorded investment		Post-modification outstanding recorded investment
Commercial real estate	—	$	—	$	—
Commercial and industrial	1	100		62
Commercial construction	—	—		—
Residential	—	—		—
Home equity	—	—		—
Consumer	—	—		—
Total	1	$	100	$	62

Loans modified as troubled debt restructuring within the previous twelve months for which there was a subsequent payment default during the period noted are detailed below.

	Six months ended June 30, 2013
(Dollars in thousands)	Number of TDR’s that defaulted	Post-modification outstanding recorded investment
Commercial real estate	1	$	137
Commercial and industrial	—	—
Commercial construction	3	746
Residential	—	—
Home equity	—	—
Consumer	—	—
Total	4	$	883

There were $38 thousand in charge-offs associated with the TDRs, noted in the table above, during the six months ended June 30, 2013. Included in the table above were two TDR's modified during the previous twelve months which defaulted and were subsequently transferred to OREO during the current period with a total post modification outstanding balance of $167 thousand. At June 30, 2013, specific reserves allocated to the TDRs entered into during the 2013 period amounted to $1 thousand, as management considered it likely the principal would ultimately be collected.

Troubled debt restructure agreements entered into during the three month period ended June 30, 2012. 

	Three months ended June 30, 2012
(Dollars in thousands)	Number of restructurings	Pre-modification outstanding recorded investment		Post-modification outstanding recorded investment
Commercial real estate	—	$	—	$	—
Commercial and industrial	2	16		12
Commercial construction	—	—		—
Residential	—	—		—
Home equity	—	—		—
Consumer	—	—		—
Total	2	$	16	$	12

Loans modified as troubled debt restructuring within the previous twelve months for which there was a subsequent payment default during the period noted are detailed below.

	Three months ended June 30, 2012
(Dollars in thousands)	Number of TDR's that defaulted	Post- modification outstanding recorded investment
Commercial real estate	—	$	—
Commercial and industrial	2	12
Commercial construction	—	—
Residential	—	—
Home Equity	—	—
Consumer	—	—
Total	2	$	12

Troubled debt restructure agreements entered into during six month the period ended June 30, 2012. 

	Six months ended June 30, 2012
(Dollars in thousands)	Number of restructurings	Pre-modification outstanding recorded investment		Post-modification outstanding recorded investment
Commercial real estate	—	$	—	$	—
Commercial and industrial	5	126		123
Commercial construction	—	—		—
Residential	1	130		128
Home equity	—	—		—
Consumer	—	—		—
Total	6	$	256	$	251

Loans modified as troubled debt restructuring within the previous twelve months for which there was a subsequent payment default during the period noted are detailed below.

	Six months ended June 30, 2012
(Dollars in thousands)	Number of TDR's that defaulted	Post- modification outstanding recorded investment
Commercial real estate	—	$	—
Commercial and industrial	3	17
Commercial construction	—	—
Residential	1	128
Home Equity	—	—
Consumer	—	—
Total	4	$	145

There were no charge-offs associated with the TDRs noted in the tables above during the six months ended June 30, 2012.  At June 30, 2012, specific reserves allocated to the TDRs entered into during the 2012 period amounted to $31 thousand, as management considered it likely the principal would ultimately be collected. Interest payments received on non-accruing new 2012 TDR loans which were applied to principal and not recognized as interest income amounted to $3 thousand for the six months ended June 30, 2012.

Other Real Estate Owned

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. 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 carrying value of OREO at June 30, 2013 was $136 thousand and consisted of 1 property, compared to $500 thousand comprised of 1 property at December 31, 2012. During the six months ended June 30, 2013, 2 properties were sold, 1 of which was held at December 31, 2012, and 2 properties were added to OREO. There was $121 thousand of gains realized on the sale of OREO in 2013. There were $45 thousand gains on OREO sales during the six months ended June 30, 2012.

Allowance for probable loan losses methodology

On a quarterly basis, management prepares an estimate of the allowance necessary to cover estimated credit losses.  The Company maintains the allowance at a level that it deems adequate to absorb all reasonably anticipated losses from specifically known and other credit risks associated with the portfolio.  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 rely on a combination of qualitative and quantitative factors that could have an impact on the credit quality of the portfolio.

There have been no material changes in 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 Company’s most recent Annual Report on Form 10-K.  Refer to heading “Allowance for probable loan losses methodology” contained in Note 5 “Allowance For Loan Losses,” to the Company’s consolidated financial statements contained in the Company’s 2012 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.

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.

During the fourth quarter of 2012, the Company purchased a group of residential mortgage loans with a June 30, 2013 carrying value of $17.2 million. These purchased loans are initially booked at fair market value and, in accordance with accounting guidance, do not carry an initial allowance for loan losses. Management will continue to closely monitor this portfolio of non classified loans for estimated credit loss under general loss allocations taking into account the loss experience as well as the quantitative and qualitative factors identified above.

The allowance for loan losses amounted to $25.7 million at June 30, 2013 compared to $24.3 million at December 31, 2012. The allowance for loan losses to total loans ratio was 1.77% at June 30, 2013 and 1.78% at December 31, 2012 compared to 1.79% at June 30, 2012.

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 June 30, 2013.

Changes in the allowance for loan losses by segment for the three months ended June 30, 2013, are presented below:

(Dollars in thousands)	Cmml Real Estate		Cmml and Industrial		Cmml Constr			Resid. Mortgage		Home Equity		Consumer		Total
Beginning Balance at March 31, 2013	$	12,359	$	7,396	$	3,486		$	975	$	672	$	128	$	25,016
Provision	614		207		(382		)	58		10		27		534
Recoveries	61		31		50			—		—		3		145
Less: Charge offs	14		1		—			—		—		9		24
Ending Balance at June 30, 2013	$	13,020	$	7,633	$	3,154		$	1,033	$	682	$	149	$	25,671

Changes in the allowance for loan losses by segment for the six months ended June 30, 2013, 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, 2012	$	11,793	$	7,297	$	3,456		$	854	$	728		$	126	$	24,254
Provision	1,180		428		(352		)	51		(23		)	33		1,317
Recoveries	61		41		50			128		21			6		307
Less: Charge offs	14		133		—			—		44			16		207
Ending Balance at June 30, 2013	$	13,020	$	7,633	$	3,154		$	1,033	$	682		$	149	$	25,671
Ending allowance balance:
Allotted to loans individually evaluated for impairment	$	915	$	2,302	$	739		$	163	$	36		$	19	$	4,174
Allotted to loans collectively evaluated for impairment	$	12,105	$	5,331	$	2,415		$	870	$	646		$	130	$	21,497

Changes in the allowance for loan losses by segment for the three months ended June 30, 2012, are presented below:

(Dollars in thousands)	Cmml Real Estate		Cmml and Industrial		Cmml Constr		Resid. Mortgage		Home Equity			Consumer		Total
Beginning Balance at March 31, 2012	$	10,598	$	7,142	$	3,196	$	827	$	764		$	80	$	22,607
Provision	622		185		133		129		(43		)	24		1,050
Recoveries	—		146		—		—		—			2		148
Less: Charge offs	223		268		—		182		—			6		679
Ending Balance at June 30, 2012	$	10,997	$	7,205	$	3,329	$	774	$	721		$	100	$	23,126

Changes in the allowance for loan losses by segment for the six months ended June 30, 2012, 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, 2011	$	10,855	$	7,568	$	3,013	$	995		$	615	$	114		$	23,160
Provision	365		510		414		(39		)	105		(5		)	1,350
Recoveries	—		192		2		—			1		3			198
Less: Charge offs	223		1,065		100		182			—		12			1,582
Ending Balance at June 30, 2012	$	10,997	$	7,205	$	3,329	$	774		$	721	$	100		$	23,126
Ending allowance balance:
Allotted to loans individually evaluated for impairment	$	819	$	2,001	$	670	$	27		$	50	$	16		$	3,583
Allotted to loans collectively evaluated for impairment	$	10,178	$	5,204	$	2,659	$	747		$	671	$	84		$	19,543

The balances of loans as of June 30, 2013 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	$	16,245	$	769,749		$	785,994
Commercial and industrial	9,235		334,274			343,509
Commercial construction	2,916		113,432			116,348
Residential	799		121,905			122,704
Home equity	109		74,530			74,639
Consumer	19		5,630			5,649
Deferred Fees	—		(1,497		)	(1,497		)
Total loans	$	29,323	$	1,418,023		$	1,447,346

The balances of loans as of December 31, 2012 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	$	22,859	$	687,406		$	710,265
Commercial and industrial	10,831		317,748			328,579
Commercial construction	2,932		118,435			121,367
Residential	648		119,630			120,278
Home equity	109		75,539			75,648
Consumer	14		4,897			4,911
Deferred Fees	—		(1,393		)	(1,393		)
Total loans	$	37,393	$	1,322,262		$	1,359,655

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Investments (Tables)

6 Months Ended

Jun. 30, 2013

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:

	June 30, 2013
(Dollars in thousands)	Amortized cost		Unrealized gains		Unrealized losses		Fair Value
Federal agency obligations (1)	$	65,111	$	191	$	50	$	65,252
Federal agency mortgage backed securities (MBS) (1)	52,563		570		976		52,157
Municipal securities	56,222		1,847		391		57,678
Corporate bonds	3,786		4		54		3,736
Certificates of deposit	858		—		3		855
Total fixed income securities	178,540		2,612		1,474		179,678
Equity investments	8,886		2,020		125		10,781
Total available for sale securities, at fair value	$	187,426	$	4,632	$	1,599	$	190,459

	December 31, 2012
(Dollars in thousands)	Amortized cost		Unrealized gains		Unrealized losses		Fair Value
Federal agency obligations(1)	$	65,247	$	438	$	—	$	65,685
Federal agency mortgage backed securities (MBS) (1)	48,429		1,287		42		49,674
Municipal securities	53,437		3,103		17		56,523
Corporate bonds	1,905		15		6		1,914
Total fixed income securities	169,018		4,843		65		173,796
Equity investments	9,080		1,622		34		10,668
Total available for sale securities, at fair value	$	178,098	$	6,465	$	99	$	184,464

__________________________________________

(1) These categories may include investments issued or guaranteed by government sponsored enterprises such as Fannie Mae (FNMA), Freddie Mac (FHLMC), Ginnie Mae (GNMA), Federal Farm Credit Bank, or one of several Federal Home Loan Banks.  All agency MBS/Collateralized Mortgage Obligations ("CMOs") investments owned by the Company are backed by residential mortgages.

Investments Classified by Contractual Maturity Date

The contractual maturity distribution at June 30, 2013 of total fixed income investments, excluding CDs which mature in less than one year, is 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	$	15,502	0.76	%	$	49,609	0.92	%	$	—	—	%	$	—	—	%
MBS	—		—	%	49		1.54	%	11,150		3.00	%	41,364		1.80	%
Municipal securities	2,226		2.53	%	15,250		2.83	%	31,841		4.32	%	6,905		6.78	%
Corporate bonds	—		—	%	2,389		1.87	%	1,397		2.47	%	—		—	%
Total fixed income securities	$	17,728	0.98	%	$	67,297	1.39	%	$	44,388	3.93	%	$	48,269	2.51	%
At fair value:
Total fixed income securities	$	17,794			$	67,696			$	45,488			$	47,845

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Fair Value Measurements

6 Months Ended

Jun. 30, 2013

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; (Level 3) significant unobservable inputs for situations in which there is little, if any, market activity for the asset or liability.  Unobservable inputs must reflect reasonable assumptions that market participants would use in pricing the asset or liability, which are developed on the basis of the best information available under the circumstances.

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

	June 30, 2013		Fair Value Measurements using:
(Dollars in thousands)	Fair Value		(level 1)		(level 2)		(level 3)
Assets measured on a recurring basis:
Fixed income securities	$	179,678	$	—	$	179,678	$	—
Equity securities	10,781		10,781		—		—
FHLB Stock	4,324		—		—		4,324
Assets measured on a non-recurring basis:
Impaired loans (collateral dependent)	7,540		—		—		7,540
Other real estate owned	136		—		—		136

	December 31, 2012		Fair Value Measurements using:
(Dollars in thousands)	Fair Value		(level 1)		(level 2)		(level 3)
Assets measured on a recurring basis:
Fixed income securities	$	173,796	$	—	$	173,796	$	—
Equity securities	10,668		10,668		—		—
FHLB Stock	4,260		—		—		4,260
Assets measured on a non-recurring basis:
Impaired loans (collateral dependent)	7,110		—		—		7,110
Other real estate owned	500		—		—		500

The Company did not have cause to transfer any assets between the fair value measurement levels during the six months ended June 30, 2013 or the year ended December 31, 2012. There were no liabilities measured at fair value on a recurring or non-recurring basis as of June 30, 2013 or December 31, 2012. There were no gains or losses due to changes in fair value, recorded in earnings for level 3 assets for the six months ended June 30, 2013, or the year ended December 31, 2012. 

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, federal agency MBS, municipal securities, corporate bonds and certificates of deposits as held at those dates. Certificates of deposit are investment securities issued by financial institutions. They are subject to FDIC insurance and trade in the open market. 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.

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 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. 

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 credit loss.  The specific allowances assigned to the collateral dependent impaired loans at June 30, 2013 amounted to $2.7 million compared to $3.3 million at December 31, 2012, a net decrease of $592 thousand.

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 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 carrying values of OREO at both June 30, 2013 and December 31, 2012 consisted of one property, respectively, at the end of each period. Two properties were added and two properties were sold during 2013; net gains realized on the sale of the OREO properties were $121 thousand.

The following table presents additional quantitative information about assets measured at fair value on a recurring and non-recurring basis for which the Company utilized Level 3 inputs (significant unobservable inputs for situations in which there is little, if any, market activity for the asset or liability) to determine fair value as of June 30, 2013.

(Dollars in thousands)	Fair Value	Valuation Technique	Unobservable Input	Unobservable Input Value or Range
Assets measured on a recurring basis:
FHLB Stock	$4,324	FHLB Stated Par Value	N/A	N/A
Assets measured on a non-recurring basis:
Impaired loans (collateral dependent)	$7,540	Appraisal of collateral	Appraisal adjustments (1)	5% - 50%
Other real estate owned	$136	Appraisal of collateral	Appraisal adjustments (1)	0% - 30%

(1) Appraisals may be adjusted by management for qualitative factors such as economic conditions and estimated liquidation expenses.

Other Guarantees and Commitments

Standby letters of credit are conditional commitments issued by the Company to guarantee the performance by a customer to a third party.  The fair value of these commitments was estimated to be the fees charged to enter into similar agreements, and accordingly these fair value measures are deemed to be FASB Level 2 measurements.  In accordance with the FASB, the estimated fair values of these commitments are carried on the balance sheet as a liability and amortized to income over the life of the letters of credit, which are typically one year.  The estimated fair value of these commitments carried on the balance sheet at June 30, 2013 and December 31, 2012 were deemed immaterial.

Interest rate lock commitments related to the origination of mortgage loans that will be sold are considered derivative instruments.  The Company estimates the fair value of these derivatives using the difference between the guaranteed interest rate in the commitment and the current market interest rate.  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 commitments to sell loans are also considered derivative instruments, with estimated fair values based on changes in current market rates.  These commitments represent the Company’s only derivative instruments and are accounted for in accordance with FASB guidance.  The fair values of the Company’s derivative instruments are deemed to be FASB Level 2 measurements.  At June 30, 2013 and December 31, 2012, the estimated fair value of the Company’s derivative instruments was considered to be immaterial.

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.  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 non-accrual 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.

Commitments: The fair values of the unused portion of lines of credit and letters of credit were estimated to be the fees currently charged to enter into similar agreements.  Commitments to originate non-mortgage loans were short-term and were at current market rates and estimated to have no significant change in fair value.

Financial liabilities: The fair values of certificates of deposit and borrowings were estimated using discounted cash flow analysis using rates offered by the Bank, or advance rates offered by the FHLB on June 30, 2013 and December 31, 2012 for similar instruments.  The fair value of junior subordinated debentures was estimated using discounted cash flow analysis using a market rate of interest at June 30, 2013 and December 31, 2012.

Limitations:  The estimates of fair value of financial instruments were based on information available at June 30, 2013 and December 31, 2012 and are not indicative of the fair market value of those instruments as of the date of this report.  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.

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.

The carrying values, estimated fair values and placement in the fair value hierarchy of the Company’s financial instruments⁽¹⁾ for which fair value is only disclosed but not recognized on the balance sheet at the dates indicated are summarized as follows:

	June 30, 2013		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	$3,917	$3,917	$	—	$	3,917	—
Loans, net	$1,421,675	$1,450,436	$	—	$	—	1,450,436
Financial liabilities:
Certificates of deposit (including brokered)	268,162	266,740	—		266,740		—
Borrowed funds	1,880	1,883	—		1,883		—
Junior subordinated debentures	10,825	11,592	—		—		11,592

	December 31, 2012		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	$8,557	$8,603	$	—	$	8,603	—
Loans, net	$1,335,401	$1,355,893	$	—	$	—	$1,355,893
Financial liabilities:
Certificates of deposit (including brokered)	231,198	231,687	—		231,687		—
Borrowed funds	26,540	26,553	—		26,553		—
Junior subordinated debentures	10,825	12,597	—		—		12,597

(1) Excluded from this table are certain financial instruments that approximated their fair value, 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.

XML

Document and Entity Information	6 Months Ended
	Jun. 30, 2013	Aug. 05, 2013
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	Jun. 30, 2013
Document Fiscal Year Focus	2013
Document Fiscal Period Focus	Q2
Amendment Flag	false
Entity Common Stock, Shares Outstanding		9,943,786

XML

Organization of Holding Company and Basis of Presentation (Policies)

6 Months Ended

Jun. 30, 2013

Accounting Policies [Abstract]

Principles of Consolidation

The Company's consolidated unaudited 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.

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, which hold various types of qualifying securities.  The security corporations are limited to conducting securities investment activities that the Bank itself would be allowed to conduct under applicable laws.

Pursuant to the Accounting Standards Codification (“ASC”) Topic 810 “Consolidation of Variable Interest Entities,” issued by the Financial Accounting Standards Board (originally issued as Financial Interpretation No. 46R) in December 2003, the Company carries 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, are excluded from the Company’s consolidated financial statements.

Comprehensive income is defined as all changes to 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. Pursuant to Accounting Standards Update (“ASU”) No. 2013-02, Comprehensive Income (Topic 220): Reporting Amounts Reclassified Out of Accumulated 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."

The Company has 21 full service branches serving the Merrimack Valley and North Central regions of Massachusetts and Southern New Hampshire. The Company is currently constructing a branch office in Nashua, NH with an anticipated opening in the fourth quarter of 2013. Through the Bank and its subsidiaries, the Company offers a range of commercial and consumer loan products, deposit and cash management products, investment advisory and wealth management, and insurance services.  The services offered through the Bank and subsidiaries are managed as one strategic unit and represent the Company’s only reportable operating segment.

The Federal Deposit Insurance Corporation (the “FDIC”) and the Massachusetts Commissioner of Banks (the “Commissioner”) 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 Commissioner also retains supervisory jurisdiction over the Company.

The accompanying unaudited consolidated financial statements and these notes should be read in conjunction with the December 31, 2012 audited consolidated financial statements and notes thereto contained in the 2012 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, 2013.  The Company has not changed its reporting policies from those disclosed in its 2012 Annual Report on Form 10-K.

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.

Reclassification

Certain previous year amounts in the unaudited consolidated interim financial statements and accompanying footnotes have been reclassified to conform to the current year’s presentation.

Other Comprehensive Income

Comprehensive income is defined as all changes to 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. Pursuant to Accounting Standards Update (“ASU”) No. 2013-02, Comprehensive Income (Topic 220): Reporting Amounts Reclassified Out of Accumulated 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."

Use of Estimates

As discussed in the Company’s 2012 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 2012 Annual Report on Form 10-K for significant accounting policies. The Company has not changed its significant accounting policies from those disclosed in its 2012 Annual Report filed on Form 10-K.

In preparing the consolidated 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 estimates and assumptions 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.