Allowance for Loan Losses

The Company provides for loan losses through the establishment of an allowance for loan losses which represents an estimated reserve for existing losses in the loan portfolio. A systematic methodology is used for determining the allowance that includes a quarterly review process, risk rating changes, and adjustments to the allowance. The loan portfolio is classified in eight classes and credit risk is evaluated separately in each class. Major risk characteristics relevant to each portfolio segment are as follows:

Commercial Real Estate - Commercial real estate loans are impacted by factors such as competitive market forces, vacancy rates, cap rates, net operating incomes, lease renewals and overall economic demand. In addition, loans in the recreational and tourism sector can be affected by weather conditions, such as unseasonably low winter snowfalls. Commercial real estate lending also carries a higher degree of environmental risk than other real estate lending.

Commercial Construction - Commercial construction loans are impacted by factors similar to those for commercial real estate loans in addition to risks related to contractor financial capacity and ability to complete a project within acceptable time frames and within budget.

Commercial Other - A weakened economy, soft consumer spending, and the rising cost of labor or raw materials are examples of issues that can impact the credit quality in this segment.

Municipal Loans - The overall health of the economy, including unemployment rates and housing prices, has an impact on the credit quality of this segment.

Residential Real Estate Term - The overall health of the economy, including unemployment rates and housing prices, has an impact on the credit quality of this segment.

Residential Real Estate Construction - Residential construction are impacted by factors similar to those for residential real estate term in addition to risks related to contractor financial capacity and ability to complete a project within acceptable time frames and within budget.

Home Equity Line of Credit - The overall health of the economy, including unemployment rates and housing prices, has an impact on the credit quality of this segment.

Consumer -The overall health of the economy, including unemployment rates, has an impact on the credit quality of this segment.

The appropriate level of the allowance is evaluated continually based on a review of significant loans, with a particular emphasis on nonaccruing, past due, and other loans that may require special attention. Other factors include general conditions in local and

national economies; loan portfolio composition and asset quality indicators; and internal factors such as changes in underwriting policies, credit administration practices, experience, ability and depth of lending management, among others. The allowance consists of four elements: (1) specific reserves for loans evaluated individually for impairment; (2) general reserves for each portfolio segment based on historical loan loss experience, (3) qualitative reserves judgmentally adjusted for local and national economic conditions, concentrations, portfolio composition, volume and severity of delinquencies and nonaccrual loans, trends of criticized and classified loans, changes in credit policies and underwriting standards, credit administration practices, and other factors as applicable for each portfolio segment; and (4) unallocated reserves. All outstanding loans are considered in evaluating the appropriateness of the allowance.

A breakdown of the allowance for loan losses as of March 31, 2018, December 31, 2017, and March 31, 2017, by class of financing receivable and allowance element, is presented in the following tables:



As of March 31, 2018	Specific Reserves on Loans Evaluated Individually for Impairment		General Reserves on Loans Based on Historical Loss Experience		Reserves for Qualitative Factors		Unallocated Reserves		Total Reserves
Commercial
Real estate	$	254,000	$	1,039,000	$	2,439,000	$	—	$	3,732,000
Construction	—		81,000		315,000		—		396,000
Other	1,664,000		597,000		1,279,000		—		3,540,000
Municipal	—		—		21,000		—		21,000
Residential
Term	272,000		303,000		554,000		—		1,129,000
Construction	—		11,000		20,000		—		31,000
Home equity line of credit	16,000		297,000		403,000		—		716,000
Consumer	—		265,000		316,000		—		581,000
Unallocated	—		—		—		811,000		811,000
	$	2,206,000	$	2,593,000	$	5,347,000	$	811,000	$	10,957,000



As of December 31, 2017	Specific Reserves on Loans Evaluated Individually for Impairment		General Reserves on Loans Based on Historical Loss Experience		Reserves for Qualitative Factors		Unallocated Reserves		Total Reserves
Commercial
Real estate	$	224,000	$	1,285,000	$	2,363,000	$	—	$	3,872,000
Construction	—		153,000		281,000		—		434,000
Other	1,309,000		723,000		1,326,000		—		3,358,000
Municipal	—		—		20,000		—		20,000
Residential
Term	255,000		311,000		564,000		—		1,130,000
Construction	—		13,000		23,000		—		36,000
Home equity line of credit	24,000		297,000		371,000		—		692,000
Consumer	—		251,000		294,000		—		545,000
Unallocated	—		—		—		642,000		642,000
	$	1,812,000	$	3,033,000	$	5,242,000	$	642,000	$	10,729,000



As of March 31, 2017	Specific Reserves on Loans Evaluated Individually for Impairment		General Reserves on Loans Based on Historical Loss Experience		Reserves for Qualitative Factors		Unallocated Reserves		Total Reserves
Commercial
Real estate	$	351,000	$	1,631,000	$	2,033,000	$	—	$	4,015,000
Construction	101,000		151,000		189,000		—		441,000
Other	39,000		840,000		1,046,000		—		1,925,000
Municipal	—		—		18,000		—		18,000
Residential
Term	251,000		282,000		436,000		—		969,000
Construction	—		9,000		15,000		—		24,000
Home equity line of credit	26,000		439,000		346,000		—		811,000
Consumer	—		337,000		236,000		—		573,000
Unallocated	—		—		—		1,591,000		1,591,000
	$	768,000	$	3,689,000	$	4,319,000	$	1,591,000	$	10,367,000

Qualitative adjustment factors are taken into consideration when determining reserve estimates. These adjustment factors are based upon Management's evaluation of various current conditions, including those listed below.


•	General economic conditions.


•	Credit quality trends with emphasis on loan delinquencies, nonaccrual levels and classified loans.


•	Recent loss experience in particular segments of the portfolio.


•	Loan volumes and concentrations, including changes in mix.


•	Other factors, including changes in quality of the loan origination; loan policy changes; changes in credit risk management processes; Bank regulatory and external loan review examination results.

The qualitative portion of the allowance for loan losses was 0.45% of related loans as of March 31, 2018 and December 31, 2017. The qualitative portion increased $105,000 between December 31, 2017 and March 31, 2018 due to loan growth and slippage in certain economic factors.

The unallocated component of the allowance totaled $811,000 at March 31, 2018, or 7.4% of the total reserve. This compares to $642,000 or 6.0% as of December 31, 2017. The change results from a measure of imprecision owing to general portfolio activity.

The allowance for loan losses as a percent of total loans stood at 0.92% as of March 31, 2018 and December 31, 2017. This compares to 0.95% as of March 31, 2017.

Commercial loans are comprised of three major classes, commercial real estate loans, commercial construction loans and other commercial loans.

Commercial real estate loans consist of mortgage loans to finance investments in real property such as multi-family residential, commercial/retail, office, industrial, hotels, educational and other specific or mixed use properties. Commercial real estate loans are typically written with amortizing payment structures. Collateral values are determined based on appraisals and evaluations in accordance with established policy and regulatory guidelines. Commercial real estate loans typically have a loan-to-value ratio of up to 80% based upon current valuation information at the time the loan is made. Commercial real estate loans are primarily paid by the cash flow generated from the real property, such as operating leases, rents, or other operating cash flows from the borrower.

Commercial construction loans consist of loans to finance construction in a mix of owner- and non-owner occupied commercial real estate properties. Commercial construction loans typically have maturities of less than two years. Payment structures during the construction period are typically on an interest only basis, although principal payments may be established depending on the type of construction project being financed. During the construction phase, commercial construction loans are primarily paid by cash flow generated from the construction project or other operating cash flows from the borrower or guarantors, if applicable. At the end of the construction period, loan repayment typically comes from a third party source in the event that the Company will not be providing permanent term financing. Collateral valuation and loan-to-value guidelines follow those for commercial real estate loans.

Other commercial loans consist of revolving and term loan obligations extended to business and corporate enterprises for the purpose of financing working capital and or capital investment. Collateral generally consists of pledges of business assets including, but not limited to, accounts receivable, inventory, plant and equipment, and/or real estate, if applicable. Commercial loans are primarily paid by the operating cash flow of the borrower. Commercial loans may be secured or unsecured.

Municipal loans are comprised of loans to municipalities in Maine for capitalized expenditures, construction projects or tax anticipation notes. All municipal loans are considered general obligations of the municipality and are collateralized by the taxing ability of the municipality for repayment of debt.

Residential loans are comprised of two classes: term loans and construction loans.

Residential term loans consist of residential real estate loans held in the Company's loan portfolio made to borrowers who demonstrate the ability to make scheduled payments with full consideration to underwriting factors. Borrower qualifications include favorable credit history combined with supportive income requirements and loan-to-value ratios within established policy and regulatory guidelines. Collateral values are determined based on appraisals and evaluations in accordance with established policy and regulatory guidelines. Residential loans typically have a loan-to-value ratio of up to 80% based on appraisal information at the time the loan is made. Collateral consists of mortgage liens on one- to four-family residential properties. Loans are offered with fixed or adjustable rates with amortization terms of up to thirty years.

Residential construction loans typically consist of loans for the purpose of constructing single family residences to be owned and occupied by the borrower. Borrower qualifications include favorable credit history combined with supportive income requirements and loan-to-value ratios within established policy and regulatory guidelines. Residential construction loans normally have construction terms of one year or less and payment during the construction term is typically on an interest only basis from sources including interest reserves, borrower liquidity and/or income. Residential construction loans will typically convert to permanent financing from the Company or have another financing commitment in place from an acceptable mortgage lender. Collateral valuation and loan-to-value guidelines are consistent with those for residential term loans.

Home equity lines of credit are made to qualified individuals and are secured by senior or junior mortgage liens on owner occupied one- to four-family homes, condominiums, or vacation homes. The home equity line of credit typically has a variable interest rate and is billed as interest-only payments during the draw period. At the end of the draw period, the home equity line of credit is billed as a percentage of the principal balance plus all accrued interest. Loan maturities are normally 300 months. Borrower qualifications include favorable credit history combined with supportive income requirements and combined loan-to- value ratios usually not exceeding 80% inclusive of priority liens. Collateral valuation guidelines follow those for residential real state loans.

Consumer loan products including personal lines of credit and amortizing loans made to qualified individuals for various purposes such as auto, recreational vehicles, debt consolidation, personal expenses or overdraft protection. Borrower qualifications include favorable credit history combined with supportive income and collateral requirements within established policy guidelines. Consumer loans may be secured or unsecured.

Construction, land and land development loans, both commercial and residential, comprise a small portion of the portfolio, and at 36.0% of capital are below the regulatory guidance limit of 100.0% of capital at March 31, 2018. Construction loans and non-owner-occupied commercial real estate loans are at 131.4% of total capital, below the regulatory limit of 300.0% of capital at March 31, 2018.

The process of establishing the allowance with respect to the commercial loan portfolio begins when a Loan Officer or Senior Officer (or designate) initially assigns each loan a risk rating, using established credit criteria. Approximately 50% of the outstanding loans and commitments are subject to review and validation annually by an independent consulting firm. Additionally, commercial loan relationships with exposure greater than or equal to $500,000 and lines of credit greater than $250,000 are subject to review annually by the Company's internal credit review function. The methodology employs Management's judgment as to the level of losses on existing loans based on internal review of the loan portfolio, including an analysis of a borrower's current financial position, and the consideration of current and anticipated economic conditions and their potential effects on specific borrowers and or lines of business.

In determining the Company's ability to collect certain loans, Management also considers the fair value of underlying collateral. The risk rating system has eight levels, defined as follows:

1 Strong

Credits rated "1" are characterized by borrowers fully responsible for the credit with excellent capacity to pay principal and interest. Loans rated "1" may be secured with acceptable forms of liquid collateral.

2 Above Average

Credits rated "2" are characterized by borrowers that have better than average liquidity, capitalization, earnings and/or cash flow with a consistent record of solid financial performance.

3 Satisfactory

Credits rated "3" are characterized by borrowers with favorable liquidity, profitability and financial condition with adequate cash flow to pay debt service.

4 Average

Credits rated "4" are characterized by borrowers that present risk more than 1, 2 and 3 rated loans and merit an ordinary level of ongoing monitoring. Financial condition is on par or somewhat below industry averages while cash flow is generally adequate to meet debt service requirements.

5 Watch

Credits rated "5" are characterized by borrowers that warrant greater monitoring due to financial condition or unresolved and identified risk factors.

6 Other Assets Especially Mentioned (OAEM)

Loans in this category are currently protected but are potentially weak and constitute an undue and unwarranted credit risk, but not to the point of justifying a classification of substandard. OAEM have potential weaknesses which may, if not checked or corrected, weaken the asset or inadequately protect the Company's credit position at some future date.

7 Substandard

Loans in this category are inadequately protected by the paying capacity of the borrower or of the collateral pledged, if any. Loans so classified have a well-defined weakness or weaknesses that jeopardize the liquidation of the debt. Substandard loans are characterized by the distinct possibility that the Company may sustain some loss if the deficiencies are not corrected.

8 Doubtful

Loans classified "Doubtful" have the same weaknesses as those classified substandard with the added characteristic that the weaknesses make collection or liquidation in full, based on currently existing facts, conditions, and values, highly questionable and improbable. The possibility of loss is high, but because of certain important and reasonably specific pending factors which may work to the advantage and strengthening of the asset, its classification as an estimated loss is deferred until its more exact status may be determined.

The following table summarizes the risk ratings for the Company's commercial real estate, commercial construction, commercial other, and municipal loans as of March 31, 2018:



	Commercial Real Estate		Commercial Construction		Commercial Other		Municipal Loans		All Risk- Rated Loans
1 Strong	$	—	$	—	$	1,251,000	$	—	$	1,251,000
2 Above Average	12,308,000		40,000		5,528,000		33,875,000		51,751,000
3 Satisfactory	74,612,000		4,776,000		38,738,000		653,000		118,779,000
4 Average	183,675,000		21,585,000		79,751,000		935,000		285,946,000
5 Watch	46,918,000		17,412,000		35,743,000		—		100,073,000
6 OAEM	3,148,000		—		1,866,000		—		5,014,000
7 Substandard	18,522,000		—		14,906,000		—		33,428,000
8 Doubtful	123,000		—		—		—		123,000
Total	$	339,306,000	$	43,813,000	$	177,783,000	$	35,463,000	$	596,365,000

The following table summarizes the risk ratings for the Company's commercial real estate, commercial construction, commercial other, and municipal loans as of December 31, 2017:



	Commercial Real Estate		Commercial Construction		Commercial Other		Municipal Loans		All Risk- Rated Loans
1 Strong	$	—	$	—	$	1,586,000	$	—	$	1,586,000
2 Above Average	12,534,000		40,000		5,776,000		32,673,000		51,023,000
3 Satisfactory	73,899,000		2,856,000		38,151,000		718,000		115,624,000
4 Average	173,956,000		22,446,000		84,360,000		—		280,762,000
5 Watch	41,652,000		12,714,000		33,934,000		—		88,300,000
6 OAEM	3,442,000		—		2,765,000		—		6,207,000
7 Substandard	18,203,000		—		14,956,000		—		33,159,000
8 Doubtful	123,000		—		—		—		123,000
Total	$	323,809,000	$	38,056,000	$	181,528,000	$	33,391,000	$	576,784,000

The following table summarizes the risk ratings for the Company's commercial real estate, commercial construction, commercial other, and municipal loans as of March 31, 2017:



	Commercial Real Estate		Commercial Construction		Commercial Other		Municipal Loans		All Risk- Rated Loans
1 Strong	$	2,000	$	—	$	499,000	$	—	$	501,000
2 Above Average	14,213,000		45,000		8,222,000		27,479,000		49,959,000
3 Satisfactory	83,021,000		2,051,000		47,724,000		848,000		133,644,000
4 Average	138,865,000		18,283,000		72,791,000		—		229,939,000
5 Watch	45,053,000		8,239,000		14,280,000		—		67,572,000
6 OAEM	4,036,000		—		5,661,000		—		9,697,000
7 Substandard	19,473,000		157,000		9,330,000		—		28,960,000
8 Doubtful	—		—		—		—		—
Total	$	304,663,000	$	28,775,000	$	158,507,000	$	28,327,000	$	520,272,000

Commercial loans are generally charged off when all or a portion of the principal amount is determined to be uncollectible. This determination is based on circumstances specific to a borrower including repayment ability, analysis of collateral and other factors as applicable.

Residential loans are comprised of two classes: term loans, which include traditional amortizing home mortgages, and construction loans, which include loans for owner-occupied residential construction. Residential loans typically have a 75% to 80% loan to value based upon current appraisal information at the time the loan is made. Home equity loans and lines of credit are typically written to the same underwriting standards. Consumer loans are primarily amortizing loans to individuals collateralized by automobiles, pleasure craft and recreation vehicles, typically with a maximum loan to value of 80% to 90% of the purchase price of the collateral. Consumer loans also include a small amount of unsecured short-term time notes to individuals.

Residential loans, consumer loans and home equity lines of credit are segregated into homogeneous pools with similar risk characteristics. Trends and current conditions are analyzed and historical loss experience is adjusted accordingly. Quantitative and qualitative adjustment factors for these segments are consistent with those for the commercial and municipal classes. Certain loans in the residential, home equity lines of credit and consumer classes identified as having the potential for further deterioration are analyzed individually to confirm impairment status, and to determine the need for a specific reserve; however there is no formal rating system used for these classes. Consumer loans greater than 120 days past due are generally charged off. Residential loans 90 days or more past due are placed on non-accrual status unless the loans are both well secured and in the process of collection. One- to four-family residential real estate loans and home equity loans are written down or charged-off no later than 180 days past due, or for residential real estate secured loans having a borrower in bankruptcy, within 60 days of receipt of notification of filing from the bankruptcy court, whichever is sooner. This is subject to completion of a current assessment of the value of the collateral with any outstanding loan balance in excess of the fair value of the property, less costs to sell, written down or charged-off.

There were no changes to the Company's accounting policies or methodology used to estimate the allowance for loan losses during the three months ended March 31, 2018.

The following table presents allowance for loan losses activity by class for the three months ended March 31, 2018, and allowance for loan loss balances by class and related loan balances by class as of March 31, 2018:



	Commercial								Municipal		Residential					Home Equity Line of Credit		Consumer		Unallocated		Total
	Real Estate			Construction			Other				Term		Construction
For the three months ended March 31, 2018
Beginning balance	$	3,872,000		$	434,000		$	3,358,000	$	20,000	$	1,130,000	$	36,000		$	692,000	$	545,000	$	642,000	$	10,729,000
Charge offs	—			—			17,000		—		81,000		—			115,000		105,000		—		318,000
Recoveries	—			—			6,000		—		4,000		—			11,000		25,000		—		46,000
Provision (credit)	(140,000		)	(38,000		)	193,000		1,000		76,000		(5,000		)	128,000		116,000		169,000		500,000
Ending balance	$	3,732,000		$	396,000		$	3,540,000	$	21,000	$	1,129,000	$	31,000		$	716,000	$	581,000	$	811,000	$	10,957,000
Allowance for loan losses as of March 31, 2018
Ending balance specifically evaluated for impairment	$	254,000		$	—		$	1,664,000	$	—	$	272,000	$	—		$	16,000	$	—	$	—	$	2,206,000
Ending balance collectively evaluated for impairment	$	3,478,000		$	396,000		$	1,876,000	$	21,000	$	857,000	$	31,000		$	700,000	$	581,000	$	811,000	$	8,751,000
Related loan balances as of March 31, 2018
Ending balance	$	339,306,000		$	43,813,000		$	177,783,000	$	35,463,000	$	439,984,000	$	15,847,000		$	110,298,000	$	25,508,000	$	—	$	1,188,002,000
Ending balance specifically evaluated for impairment	$	8,951,000		$	741,000		$	9,440,000	$	—	$	11,528,000	$	—		$	1,039,000	$	16,000	$	—	$	31,715,000
Ending balance collectively evaluated for impairment	$	330,355,000		$	43,072,000		$	168,343,000	$	35,463,000	$	428,456,000	$	15,847,000		$	109,259,000	$	25,492,000	$	—	$	1,156,287,000

The following table presents allowance for loan losses activity by class for the year ended December 31, 2017 and allowance for loan loss balances by class and related loan balances by class as of December 31, 2017:



							Municipal		Residential					Home Equity Line of Credit			Consumer		Unallocated			Total
	Real Estate		Construction		Other				Term		Construction

Beginning balance	$	3,988,000	$	396,000	$	1,780,000	$	18,000	$	1,288,000	$	44,000		$	807,000		$	559,000	$	1,258,000		$	10,138,000
Charge offs	587,000		—		212,000		—		456,000		—			28,000			335,000		—			1,618,000
Recoveries	—		—		49,000		—		40,000		—			11,000			109,000		—			209,000
Provision (credit)	471,000		38,000		1,741,000		2,000		258,000		(8,000		)	(98,000		)	212,000		(616,000		)	2,000,000
Ending balance	$	3,872,000	$	434,000	$	3,358,000	$	20,000	$	1,130,000	$	36,000		$	692,000		$	545,000	$	642,000		$	10,729,000

Ending balance specifically evaluated for impairment	$	224,000	$	—	$	1,309,000	$	—	$	255,000	$	—		$	24,000		$	—	$	—		$	1,812,000
Ending balance collectively evaluated for impairment	$	3,648,000	$	434,000	$	2,049,000	$	20,000	$	875,000	$	36,000		$	668,000		$	545,000	$	642,000		$	8,917,000

Ending balance	$	323,809,000	$	38,056,000	$	181,528,000	$	33,391,000	$	432,661,000	$	17,868,000		$	111,302,000		$	25,524,000	$	—		$	1,164,139,000
Ending balance specifically evaluated for impairment	$	7,790,000	$	741,000	$	9,918,000	$	—	$	11,748,000	$	—		$	1,179,000		$	16,000	$	—		$	31,392,000
Ending balance collectively evaluated for impairment	$	316,019,000	$	37,315,000	$	171,610,000	$	33,391,000	$	420,913,000	$	17,868,000		$	110,123,000		$	25,508,000	$	—		$	1,132,747,000

The following table presents allowance for loan losses activity by class for the three months ended March 31, 2017, and allowance for loan loss balances by class and related loan balances by class as of March 31, 2017:



	Commercial						Municipal		Residential						Home Equity Line of Credit		Consumer		Unallocated		Total
	Real Estate		Construction		Other				Term			Construction
For the three months ended March 31, 2017
Beginning balance	$	3,988,000	$	396,000	$	1,780,000	$	18,000	$	1,288,000		$	44,000		$	807,000	$	559,000	$	1,258,000	$	10,138,000
Charge offs	164,000		—		—		—		53,000			—			7,000		103,000		—		327,000
Recoveries	—		—		11,000		—		14,000			—			—		31,000		—		56,000
Provision (credit)	191,000		45,000		134,000		—		(280,000		)	(20,000		)	11,000		86,000		333,000		500,000
Ending balance	$	4,015,000	$	441,000	$	1,925,000	$	18,000	$	969,000		$	24,000		$	811,000	$	573,000	$	1,591,000	$	10,367,000
Allowance for loan losses as of March 31, 2017
Ending balance specifically evaluated for impairment	$	351,000	$	101,000	$	39,000	$	—	$	251,000		$	—		$	26,000	$	—	$	—	$	768,000
Ending balance collectively evaluated for impairment	$	3,664,000	$	340,000	$	1,886,000	$	18,000	$	718,000		$	24,000		$	785,000	$	573,000	$	1,591,000	$	9,599,000
Related loan balances as of March 31, 2017
Ending balance	$	304,663,000	$	28,775,000	$	158,507,000	$	28,327,000	$	421,202,000		$	13,717,000		$	110,016,000	$	24,528,000	$	—	$	1,089,735,000
Ending balance specifically evaluated for impairment	$	10,671,000	$	763,000	$	1,710,000	$	—	$	13,260,000		$	—		$	1,448,000	$	—	$	—	$	27,852,000
Ending balance collectively evaluated for impairment	$	293,992,000	$	28,012,000	$	156,797,000	$	28,327,000	$	407,942,000		$	13,717,000		$	108,568,000	$	24,528,000	$	—	$	1,061,883,000