XML 93 R79.htm IDEA: XBRL DOCUMENT
v3.25.0.1

Allowance for Credit Losses - Narrative (Details) | 12 Months Ended |
--- | --- | ---
Dec. 31, 2024 USD ($) loan_class unit | Dec. 31, 2023
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Number of loan classes | loan_class | 11 |
Loan-to-value percent, commercial real estate | 80.00% |
Construction loans, percent of capital | 46.90% |
Construction loans, maximum percent of capital | 100.00% |
Construction loans and non-owner-occupied commercial real estate loans, percent of capital | 224.70% |
Construction loans and non-owner-occupied commercial real estate loans, maximum percent of capital | 300.00% |
Allowance for loan losses as a percent of total loans | 1.06% | 1.13%
Outstanding loans and commitments subject by independent consulting firm | 60.00% |
Commercial |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Amount of claims under review by management | $ | $ 750,000 |
Commercial | Construction |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Loan maturities | 2 years |
Commercial | Multifamily |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Number of units | unit | 5 |
Residential |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Loan maturities | 30 years |
Loan to value ratio | 0.80 |
Residential | Construction |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Loan maturities | 1 year |
Home Equity |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Loan maturities | 300 months |
Loan to value ratio | 0.80 |

X
- Definition Allowance for Loan Losses of Total Loans, Percentage + References No definition available. + Details
Name: | fnlc_AllowanceforLoanLossesofTotalLoansPercentage
Namespace Prefix: | fnlc_
Data Type: | dtr-types1:percentItemType
Balance Type: | na
Period Type: | instant

X
- Definition The maximum percentage of loan to value for commercial real estate loans based on current appraisal information. + References No definition available. + Details
Name: | fnlc_CommercialRealEstateLoansMaximumLoanToValue
Namespace Prefix: | fnlc_
Data Type: | dtr-types1: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: | dtr-types1: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: | dtr-types1: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: | dtr-types1: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: | dtr-types1:percentItemType
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 Percentage of loans and commitments subject to review by an independent consulting firm each year. + References No definition available. + Details
Name: | fnlc_FinancingReceivableOutstandingLoansAndCommitmentsSubjectByIndependentConsultingFirm
Namespace Prefix: | fnlc_
Data Type: | dtr-types1:percentItemType
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 Financing Receivables, Number Of Loan Classes + References No definition available. + Details
Name: | fnlc_FinancingReceivablesNumberOfLoanClasses
Namespace Prefix: | fnlc_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | instant

X
- Definition Financing Receivables, Subject To Annual Internal Credit Review + References No definition available. + Details
Name: | fnlc_FinancingReceivablesSubjectToAnnualInternalCreditReview
Namespace Prefix: | fnlc_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Number of Units in Commercial Multifamily Properties + References No definition available. + Details
Name: | fnlc_NumberOfUnitsInCommercialMultifamilyProperties
Namespace Prefix: | fnlc_
Data Type: | xbrli:integerItemType
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 Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 310 -SubTopic 20 -Name Accounting Standards Codification -Section 40 -Paragraph 7 -Publisher FASB -URI https://asc.fasb.org/1943274/2147481628/310-20-40-7 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 310 -SubTopic 10 -Name Accounting Standards Codification -Section 45 -Paragraph 2 -Publisher FASB -URI https://asc.fasb.org/1943274/2147481990/310-10-45-2 + Details
Name: | us-gaap_AccountsNotesAndLoansReceivableLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | us-gaap_FinancingReceivablePortfolioSegmentAxis=us-gaap_CommercialPortfolioSegmentMember
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: | us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis=srt_MultifamilyMember
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: |