XML 66 R54.htm IDEA: XBRL DOCUMENT
v3.20.2

Allowance for Loan Losses - Narrative (Details) $ in Thousands | 9 Months Ended | 12 Months Ended |  |  |  |
--- | --- | --- | --- | --- | --- | ---
Sep. 30, 2020 USD ($) loan_class | Dec. 31, 2019 USD ($) | Jun. 30, 2020 USD ($) | Sep. 30, 2019 USD ($) | Jun. 30, 2019 USD ($) | Dec. 31, 2018 USD ($)
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |
Number of classes in the loan portfolio | loan_class | 8 |  |  |  |  |
Allowance for loan and lease losses (as a percentage) | 0.77% | 0.48% |  |  |  |
Allowance for loan and lease losses, period increase (decrease) | $ 4,818 |  |  |  |  |
Allowance for loan losses | $ 15,371 | $ 11,639 | $ 14,110 | $ 11,765 | $ 11,471 | $ 11,232
Allowance for loan losses as a percent of total loans | 1.07% | 0.90% |  | 0.93% |  |
Number of classes in the commercial loan portfolio | loan_class | 3 |  |  |  |  |
Residential loans typical loan to value range (as a percentage) | 80.00% |  |  |  |  |
Number of classes in the residential loan portfolio | loan_class | 2 |  |  |  |  |
Construction loans accrual to company capital | 33.40% |  |  |  |  |
Constructions loan portfolio maximum to company capital | 100.00% |  |  |  |  |
Construction and non owner occupied commercial real estate | 129.40% |  |  |  |  |
Maximum loan portfolio to company capital | 300.00% |  |  |  |  |
Outstanding loans and commitments subject by independent consulting firm | 60.00% |  |  |  |  |
Consumer |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |
Allowance for loan losses | $ 592 | $ 867 | 658 | $ 680 | 649 | 630
Delinquent period before consumer loans charged off | 120 days |  |  |  |  |
Residential |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |
Loan-to-value ratio | 0.80 |  |  |  |  |
Amortization term of residential loans | 30 years |  |  |  |  |
Delinquent period before residential loans placed on non accrual status | 90 days |  |  |  |  |
Delinquent period for loans charged off | 180 days |  |  |  |  |
Delinquency period for loans charged off after receipt of notification from bankruptcy court | 60 days |  |  |  |  |
Home equity line of credit |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |
Allowance for loan losses | $ 1,457 | 1,078 | 1,284 | 824 | 633 | 730
Loan-to-value ratio | 0.80 |  |  |  |  |
Loan maturities period | 300 months |  |  |  |  |
Unallocated Reserves |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |
Allowance for loan losses | $ 1,576 | $ 1,182 |  | 1,707 |  |
Total reserve allowance accounted for by loan loss allowances (percent) | 10.30% | 10.20% |  |  |  |
Construction | Residential |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |
Allowance for loan losses | $ 81 | $ 25 | $ 64 | $ 23 | $ 23 | $ 34
Loan maturities period | 1 year |  |  |  |  |
Minimum |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |
Residential loans typical loan to value range (as a percentage) | 75.00% |  |  |  |  |
Collateralized consumer loans to individuals loan to value maximum range (as a percentage) | 80.00% |  |  |  |  |
Maximum |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |
Residential loans typical loan to value range (as a percentage) | 80.00% |  |  |  |  |
Collateralized consumer loans to individuals loan to value maximum range (as a percentage) | 90.00% |  |  |  |  |

X
- Definition Allowance for Loan Losses of Total Loans, Percentage + References No definition available. + Details
Name: | fnlc_AllowanceforLoanLossesofTotalLoansPercentage
Namespace Prefix: | fnlc_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | instant

X
- Definition Allowance for Loan and Lease Losses, Related Loans, Percentage + References No definition available. + Details
Name: | fnlc_AllowanceforLoanandLeaseLossesRelatedLoansPercentage
Namespace Prefix: | fnlc_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition Allowance for Loan and Lease Losses, Related Loans, Period Increase (Decrease) + References No definition available. + Details
Name: | fnlc_AllowanceforLoanandLeaseLossesRelatedLoansPeriodIncreaseDecrease
Namespace Prefix: | fnlc_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Collateralized Consumer Loans To Individuals Loan To Value + References No definition available. + Details
Name: | fnlc_CollateralizedConsumerLoansToIndividualsLoanToValue
Namespace Prefix: | fnlc_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | instant

X
- Definition The regulatory maximum allowed ratio of loan portfolio to Company capital for construction and non-owner-occupied commercial real estate. + References No definition available. + Details
Name: | fnlc_ConstructionAndNonOwnerOccupiedCommercialRealEstateLoansMaximumLoanPortfolioToCompanyCapital
Namespace Prefix: | fnlc_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | instant

X
- Definition The actual ratio of loan amount to Company capital for construction and non-owner-occupied commercial real estate. + References No definition available. + Details
Name: | fnlc_ConstructionAndNonOwnerOccupiedCommercialRealEstateLoansPortfolioToCompanyCapital
Namespace Prefix: | fnlc_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | instant

X
- Definition The regulatory maximum allowed ratio of loan portfolio to Company capital for construction loans. + References No definition available. + Details
Name: | fnlc_ConstructionLoanPortfolioMaximumToCompanyCapital
Namespace Prefix: | fnlc_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | instant

X
- Definition The ratio of loan portfolio to Company capital for construction loans . + References No definition available. + Details
Name: | fnlc_ConstructionLoansActualLoanPortfolioToCompanyCapital
Namespace Prefix: | fnlc_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | instant

X
- Definition Delinquent Period Before Consumer Loans Charged Off + References No definition available. + Details
Name: | fnlc_DelinquentPeriodBeforeConsumerLoansChargedOff
Namespace Prefix: | fnlc_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- Definition The minimum amount of days past due at which residential loans are placed on non-accrual status.. + References No definition available. + Details
Name: | fnlc_DelinquentPeriodBeforeResidentialLoansPlacedOnNonAccrualStatus
Namespace Prefix: | fnlc_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- Definition Delinquent Period for Loans Charged Off + References No definition available. + Details
Name: | fnlc_DelinquentPeriodforLoansChargedOff
Namespace Prefix: | fnlc_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- Definition Delinquent Period for Loans Charged Off, Period After Receipt of Notification from Bankruptcy Court + References No definition available. + Details
Name: | fnlc_DelinquentPeriodforLoansChargedOffPeriodAfterReceiptofNotificationfromBankruptcyCourt
Namespace Prefix: | fnlc_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- Definition Financing Receivable, Amortization Term + References No definition available. + Details
Name: | fnlc_FinancingReceivableAmortizationTerm
Namespace Prefix: | fnlc_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- Definition Financing Receivable, Commercial, Number of Loan Classes + References No definition available. + Details
Name: | fnlc_FinancingReceivableCommercialNumberOfLoanClasses
Namespace Prefix: | fnlc_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | instant

X
- Definition Financing Receivable, Loan to Value Ratio + References No definition available. + Details
Name: | fnlc_FinancingReceivableLoanToValueRatio
Namespace Prefix: | fnlc_
Data Type: | xbrli:pureItemType
Balance Type: | na
Period Type: | duration

X
- Definition Financing Receivable, Number of Loan Classes + References No definition available. + Details
Name: | fnlc_FinancingReceivableNumberOfLoanClasses
Namespace Prefix: | fnlc_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | instant

X
- Definition Financing Receivable, Residential, Number of Loan Classes + References No definition available. + Details
Name: | fnlc_FinancingReceivableResidentialNumberOfLoanClasses
Namespace Prefix: | fnlc_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | instant

X
- Definition Financing Receivable, Term + References No definition available. + Details
Name: | fnlc_FinancingReceivableTerm
Namespace Prefix: | fnlc_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- Definition Percentage of loans and commitments subject to review by an independent consulting firm each year. + References No definition available. + Details
Name: | fnlc_OutstandingLoansAndCommitmentsSubjectByIndependentConsultingFirm
Namespace Prefix: | fnlc_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | instant

X
- Definition Percentage of Total Reserve Allowance accounted for by Loan Loss Allowances + References No definition available. + Details
Name: | fnlc_PercentageofTotalReserveAllowanceaccountedforbyLoanLossAllowances
Namespace Prefix: | fnlc_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | instant

X
- Definition Residential Loans Typical Loan To Value + References No definition available. + Details
Name: | fnlc_ResidentialLoansTypicalLoanToValue
Namespace Prefix: | fnlc_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | instant

X
- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
Name: | us-gaap_AccountsNotesAndLoansReceivableLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Amount of allowance for credit loss on financing receivable. Excludes allowance for financing receivable covered under loss sharing agreement. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 11B -Subparagraph (c)(1) -URI http://asc.fasb.org/extlink&oid=121611835&loc=SL6953423-111524 Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03(7)(2)) -URI http://asc.fasb.org/extlink&oid=120398452&loc=d3e534808-122878 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 326 -SubTopic 20 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=121599878&loc=SL82895884-210446 Reference 4: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 326 -SubTopic 20 -Section 50 -Paragraph 13 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=121599337&loc=SL82919249-210447 Reference 5: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 326 -SubTopic 20 -Section 50 -Paragraph 13 -Subparagraph (f) -URI http://asc.fasb.org/extlink&oid=121599337&loc=SL82919249-210447 + Details
Name: | us-gaap_FinancingReceivableAllowanceForCreditLosses
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Details
Name: | us-gaap_FinancingReceivablePortfolioSegmentAxis=us-gaap_ConsumerPortfolioSegmentMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancingReceivablePortfolioSegmentAxis=us-gaap_ResidentialPortfolioSegmentMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancingReceivablePortfolioSegmentAxis=fnlc_HomeEquityLineOfCreditPortfolioMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | fnlc_FinancingReceivableInformationByTypeOfReserveAxis=fnlc_UnallocatedReservesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis=us-gaap_ConstructionLoansMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_RangeAxis=srt_MinimumMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_RangeAxis=srt_MaximumMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |