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Allowance for Loan Losses
 12 Months Ended
Dec. 31, 2020
Receivables [Abstract]  
Allowance for Loan Losses 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. 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 - The overall health of the economy, including unemployment rates and housing prices, has an impact on the credit quality of this segment. Residential construction loans are impacted by factors similar to those for residential real estate term loans 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 following table summarizes the composition of the allowance for loan losses, by class of financing receivable and allowance, as of December 31, 2020 and 2019:
As of December 31,20202019
Allowance for Loans Evaluated Individually for Impairment
Commercial
Real estate$112,000 $251,000 
Construction18,000 — 
Other169,000 1,273,000 
Municipal— — 
Residential
Term163,000 237,000 
Construction— — 
Home equity line of credit— 447,000 
Consumer— 5,000 
Total$462,000 $2,213,000 
Allowance for Loans Evaluated Collectively for Impairment
Commercial
Real estate$5,066,000 $3,491,000 
Construction644,000 365,000 
Other3,269,000 2,056,000 
Municipal171,000 27,000 
Residential
Term2,416,000 787,000 
Construction102,000 25,000 
Home equity line of credit1,211,000 631,000 
Consumer778,000 862,000 
Unallocated2,134,000 1,182,000 
Total$15,791,000 $9,426,000 
Total Allowance for Loan Losses
Commercial  
Real estate$5,178,000 $3,742,000 
Construction662,000 365,000 
Other3,438,000 3,329,000 
Municipal171,000 27,000 
Residential
Term2,579,000 1,024,000 
Construction102,000 25,000 
Home equity line of credit1,211,000 1,078,000 
Consumer778,000 867,000 
Unallocated2,134,000 1,182,000 
Total$16,253,000 $11,639,000 
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 December 31, 2020 and 2019, by class of financing receivable and allowance element, is presented in the following tables:
As of December 31, 2020Specific Reserves on Loans Evaluated Individually for ImpairmentGeneral Reserves on Loans Based on Historical Loss ExperienceReserves for Qualitative FactorsUnallocated ReservesTotal Reserves
Commercial
Real estate$112,000 $721,000 $4,345,000 $— $5,178,000 
Construction18,000 92,000 552,000 — 662,000 
Other169,000 465,000 2,804,000 — 3,438,000 
Municipal— — 171,000 — 171,000 
Residential
Term163,000 145,000 2,271,000 — 2,579,000 
Construction— 6,000 96,000 — 102,000 
Home equity line of credit— 151,000 1,060,000 — 1,211,000 
Consumer— 282,000 496,000 — 778,000 
Unallocated— — — 2,134,000 2,134,000 
$462,000 $1,862,000 $11,795,000 $2,134,000 $16,253,000 
As of December 31, 2019Specific Reserves on Loans Evaluated Individually for ImpairmentGeneral Reserves on Loans Based on Historical Loss ExperienceReserves for Qualitative FactorsUnallocated ReservesTotal Reserves
Commercial
Real estate$251,000 $729,000 $2,762,000 $— $3,742,000 
Construction— 76,000 289,000 — 365,000 
Other1,273,000 430,000 1,626,000 — 3,329,000 
Municipal— — 27,000 — 27,000 
Residential    
Term237,000 153,000 634,000 — 1,024,000 
Construction— 5,000 20,000 — 25,000 
Home equity line of credit447,000 130,000 501,000 — 1,078,000 
Consumer5,000 460,000 402,000 — 867,000 
Unallocated— — — 1,182,000 1,182,000 
 $2,213,000 $1,983,000 $6,261,000 $1,182,000 $11,639,000 
Qualitative adjustment factors are taken into consideration when determining reserve estimates. These adjustment factors are based upon our 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 loan originations; loan policy changes; changes in credit risk management processes; Bank regulatory and external loan review examination results.

Qualitative factors applied to the portfolio or segments of the portfolio may include judgments concerning general economic
conditions that may affect credit quality, credit concentrations, the pace of portfolio growth, the direction of risk rating movements, policy exception levels, and delinquency levels; these qualitative factors are also considered in connection with the unallocated portion of our allowance for loan losses.
The qualitative portion of the allowance for loan losses was 0.80% of related loans as of December 31, 2020 and 0.48% of related loans as of December 31, 2019. The qualitative portion increased $5,534,000 between December 31, 2019 and December 31, 2020 due to a mix of factors. These included the impacts of the COVID-19 pandemic on various macroeconomic measures used in the qualitative model, as well as analysis of the loan portfolio conducted under both top down and unit level approaches for factors such as levels of credit extended to industry segments particularly vulnerable to social distancing, and performance of COVID-19 related modifications.
The unallocated component totaled $2,134,000 at December 31, 2020, or 13.1% of the total reserve. This compares to $1,182,000 or 10.2% as of December 31, 2019. While year to date growth in the qualitative portion of the reserve directionally reflects potential impacts of COVID-19 on the loan portfolio, it remains likely that there are other underlying credit risks not yet captured in loan specific or qualitative metrics the Company uses to estimate its allowance. This uncertainty along with general imprecision related to portfolio growth experienced year-to-date, and potential unknowns that may be present in loans acquired in the Belfast branch purchase, all support the continued inclusion of an unallocated component.
The allowance for loan losses as a percent of total loans stood at 1.10% as of December 31, 2020, compared to 0.90% of total loans as of December 31, 2019. When PPP loan balances are excluded, the allowance for loan losses as a percent of total loans was 1.15% as of December 31, 2020.
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 Bank 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 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. In 2020, other commercial loans also include loans made under the SBA PPP. These loans are unsecured and carry a 100% guarantee from the SBA.
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 Bank's loan portfolio made to borrowers who demonstrate the ability to make scheduled payments with full consideration of 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 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 Bank 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 payments are 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 estate 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 37.7% of capital at December 31, 2020 are below the regulatory guidance of 100.0% of capital. Construction loans and non- owner-occupied commercial real estate loans are at 147.1% of total capital at December 31, 2020, below the regulatory limit of 300.0% of capital.
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 60% of a trailing four quarter average gross commercial portfolio is subject to review and validation annually by an independent consulting firm. Additionally, commercial loan relationships with exposure greater than or equal to $500,000 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 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 supported 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 Bank's credit position at some future date.
7    Substandard
Loans in this category are inadequately supported by the current paying capacity of the borrower or of the collateral, if any. These loans have a well-defined weakness or weaknesses that jeopardize the liquidation of the debt. Substandard loans are characterized by the distinct possibility that the Bank may sustain some loss if 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 construction, commercial real estate, commercial other and municipal loans as of December 31, 2020:
 Commercial
Real Estate		Commercial
Construction		Commercial
Other		Municipal
Loans		All Risk-
Rated Loans
1 Strong$— $— $2,402,000 $19,000 $2,421,000 
2 Above average5,938,000 2,343,000 6,326,000 41,939,000 56,546,000 
3 Satisfactory91,475,000 2,889,000 104,432,000 369,000 199,165,000 
4 Average261,539,000 31,221,000 120,570,000 1,456,000 414,786,000 
5 Watch72,840,000 19,893,000 44,293,000 — 137,026,000 
6 OAEM2,754,000 — 234,000 — 2,988,000 
7 Substandard7,575,000 219,000 6,758,000 — 14,552,000 
8 Doubtful— — — — — 
Total$442,121,000 $56,565,000 $285,015,000 $43,783,000 $827,484,000 
The following table summarizes the risk ratings for the Company's commercial construction, commercial real estate, commercial other and municipal loans as of December 31, 2019:
 Commercial
Real Estate		Commercial
Construction		Commercial
Other		Municipal
Loans		All Risk-
Rated Loans
1 Strong$— $— $4,258,000 $32,000 $4,290,000 
2 Above average12,393,000 794,000 6,187,000 38,290,000 57,664,000 
3 Satisfactory74,709,000 2,305,000 41,527,000 379,000 118,920,000 
4 Average205,510,000 19,017,000 107,389,000 2,587,000 334,503,000 
5 Watch63,582,000 15,488,000 47,152,000 — 126,222,000 
6 OAEM1,160,000 — 1,988,000 — 3,148,000 
7 Substandard15,456,000 480,000 10,272,000 — 26,208,000 
8 Doubtful— — — — — 
Total$372,810,000 $38,084,000 $218,773,000 $41,288,000 $670,955,000 

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 ratio 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 ratio 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 year ended December 31, 2020.
The following tables present allowance for loan losses activity by class, allowance for loan loss balances by class and related loan balances by class for the years ended December 31, 2020, 2019 and 2018:
For the year ended December 31, 2020
CommercialResidentialHome Equity
Line of Credit
Real EstateConstructionOtherMunicipalTermConstructionConsumerUnallocatedTotal
Allowance for loan losses:
Beginning balance$3,742,000 $365,000 $3,329,000 $27,000 $1,024,000 $25,000 $1,078,000 $867,000 $1,182,000 $11,639,000 
Chargeoffs1,088,000 — 27,000 — 66,000 — 153,000 327,000 — 1,661,000 
Recoveries— — 37,000 — 34,000 — 22,000 132,000 — 225,000 
Provision 2,524,000 297,000 99,000 144,000 1,587,000 77,000 264,000 106,000 952,000 6,050,000 
Ending balance$5,178,000 $662,000 $3,438,000 $171,000 $2,579,000 $102,000 $1,211,000 $778,000 $2,134,000 $16,253,000 
Ending balance specifically evaluated for impairment$112,000 $18,000 $169,000 $— $163,000 $— $— $— $— $462,000 
Ending balance collectively evaluated for impairment$5,066,000 $644,000 $3,269,000 $171,000 $2,416,000 $102,000 $1,211,000 $778,000 $2,134,000 $15,791,000 
Related loan balances:
Ending balance$442,121,000 $56,565,000 $285,015,000 $43,783,000 $522,070,000 $21,600,000 $79,750,000 $25,857,000 $— $1,476,761,000 
Ending balance specifically evaluated for impairment$3,029,000 $770,000 $1,779,000 $— $9,414,000 $— $1,039,000 $8,000 $— $16,039,000 
Ending balance collectively evaluated for impairment$439,092,000 $55,795,000 $283,236,000 $43,783,000 $512,656,000 $21,600,000 $78,711,000 $25,849,000 $— $1,460,722,000 
For the year ended December 31, 2019
CommercialResidentialHome Equity
Line of Credit
Real EstateConstructionOtherMunicipalTermConstructionConsumerUnallocatedTotal
Allowance for loan losses:
Beginning balance$3,567,000 $255,000 $3,541,000 $24,000 $1,235,000 $34,000 $730,000 $630,000 $1,216,000 $11,232,000 
Chargeoffs89,000 — 179,000 — 445,000 — 69,000 338,000 — 1,120,000 
Recoveries15,000 — 73,000 — 57,000 — 4,000 128,000 — 277,000 
Provision (credit)249,000 110,000 (106,000)3,000 177,000 (9,000)413,000 447,000 (34,000)1,250,000 
Ending balance$3,742,000 $365,000 $3,329,000 $27,000 $1,024,000 $25,000 $1,078,000 $867,000 $1,182,000 $11,639,000 
Ending balance specifically evaluated for impairment$251,000 $— $1,273,000 $— $237,000 $— $447,000 $5,000 $— $2,213,000 
Ending balance collectively evaluated for impairment$3,491,000 $365,000 $2,056,000 $27,000 $787,000 $25,000 $631,000 $862,000 $1,182,000 $9,426,000 
Related loan balances:
Ending balance$372,810,000 $38,084,000 $218,773,000 $41,288,000 $492,455,000 $14,813,000 $92,349,000 $26,503,000 $— $1,297,075,000 
Ending balance specifically evaluated for impairment$6,309,000 $958,000 $7,075,000 $— $12,439,000 $— $2,488,000 $5,000 $— $29,274,000 
Ending balance collectively evaluated for impairment$366,501,000 $37,126,000 $211,698,000 $41,288,000 $480,016,000 $14,813,000 $89,861,000 $26,498,000 $— $1,267,801,000 
For the year ended December 31, 2018
CommercialResidentialHome Equity
Line of Credit
Real EstateConstructionOtherMunicipalTermConstructionConsumerUnallocatedTotal
Allowance for loan losses:
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 
Chargeoffs168,000 — 423,000 — 213,000 — 121,000 348,000 — 1,273,000 
Recoveries52,000 — 40,000 — 64,000 — 24,000 96,000 — 276,000 
Provision (credit)(189,000)(179,000)566,000 4,000 254,000 (2,000)135,000 337,000 574,000 1,500,000 
Ending balance$3,567,000 $255,000 $3,541,000 $24,000 $1,235,000 $34,000 $730,000 $630,000 $1,216,000 $11,232,000 
Ending balance specifically evaluated for impairment$260,000 $— $1,696,000 $— $335,000 $— $17,000 $— $— $2,308,000 
Ending balance collectively evaluated for impairment$3,307,000 $255,000 $1,845,000 $24,000 $900,000 $34,000 $713,000 $630,000 $1,216,000 $8,924,000 
Related loan balances:
Ending balance$353,243,000 $27,304,000 $196,391,000 $51,128,000 $469,145,000 $17,743,000 $98,469,000 $24,860,000 $— $1,238,283,000 
Ending balance specifically evaluated for impairment$9,760,000 $721,000 $9,259,000 $— $10,904,000 $— $1,092,000 $15,000 $— $31,751,000 
Ending balance collectively evaluated for impairment$343,483,000 $26,583,000 $187,132,000 $51,128,000 $458,241,000 $17,743,000 $97,377,000 $24,845,000 $— $1,206,532,000