XML 93 R79.htm IDEA: XBRL DOCUMENT
v3.22.4

Allowance for Loan Losses - Financing Receivable and Allowance Element by Class (Details) - USD ($) $ in Thousands | Dec. 31, 2022 | Dec. 31, 2021 | Dec. 31, 2020 | Dec. 31, 2019
--- | --- | --- | --- | ---
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Allowance for loan losses | $ 16,723 | $ 15,521 | $ 16,253 | $ 11,639
Commercial | Real estate |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Allowance for loan losses | 6,116 | 5,367 | 5,178 | 3,742
Commercial | Construction |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Allowance for loan losses | 821 | 746 | 662 | 365
Commercial | Other |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Allowance for loan losses | 3,097 | 2,830 | 3,438 | 3,329
Municipal |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Allowance for loan losses | 162 | 157 | 171 | 27
Residential | Construction |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Allowance for loan losses | 199 | 148 | 102 | 25
Residential | Term |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Allowance for loan losses | 2,559 | 2,733 | 2,579 | 1,024
Home equity line of credit |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Allowance for loan losses | 1,029 | 925 | 1,211 | 1,078
Consumer |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Allowance for loan losses | 1,062 | 833 | 778 | 867
Unallocated |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Allowance for loan losses | 1,678 | 1,782 | $ 2,134 | $ 1,182
Specific Reserves on Loans Evaluated Individually for Impairment |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Allowance for loan losses | 398 | 576 |  |
Specific Reserves on Loans Evaluated Individually for Impairment | Commercial | Real estate |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Allowance for loan losses | 0 | 42 |  |
Specific Reserves on Loans Evaluated Individually for Impairment | Commercial | Construction |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Allowance for loan losses | 0 | 16 |  |
Specific Reserves on Loans Evaluated Individually for Impairment | Commercial | Other |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Allowance for loan losses | 298 | 381 |  |
Specific Reserves on Loans Evaluated Individually for Impairment | Municipal |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Allowance for loan losses | 0 | 0 |  |
Specific Reserves on Loans Evaluated Individually for Impairment | Residential | Construction |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Allowance for loan losses | 0 | 0 |  |
Specific Reserves on Loans Evaluated Individually for Impairment | Residential | Term |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Allowance for loan losses | 100 | 137 |  |
Specific Reserves on Loans Evaluated Individually for Impairment | Home equity line of credit |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Allowance for loan losses | 0 | 0 |  |
Specific Reserves on Loans Evaluated Individually for Impairment | Consumer |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Allowance for loan losses | 0 | 0 |  |
Specific Reserves on Loans Evaluated Individually for Impairment | Unallocated |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Allowance for loan losses | 0 | 0 |  |
General Reserves on Loans Based on Historical Loss Experience |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Allowance for loan losses | 2,028 | 1,856 |  |
General Reserves on Loans Based on Historical Loss Experience | Commercial | Real estate |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Allowance for loan losses | 974 | 831 |  |
General Reserves on Loans Based on Historical Loss Experience | Commercial | Construction |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Allowance for loan losses | 131 | 114 |  |
General Reserves on Loans Based on Historical Loss Experience | Commercial | Other |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Allowance for loan losses | 446 | 382 |  |
General Reserves on Loans Based on Historical Loss Experience | Municipal |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Allowance for loan losses | 0 | 0 |  |
General Reserves on Loans Based on Historical Loss Experience | Residential | Construction |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Allowance for loan losses | 7 | 10 |  |
General Reserves on Loans Based on Historical Loss Experience | Residential | Term |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Allowance for loan losses | 83 | 175 |  |
General Reserves on Loans Based on Historical Loss Experience | Home equity line of credit |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Allowance for loan losses | 101 | 101 |  |
General Reserves on Loans Based on Historical Loss Experience | Consumer |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Allowance for loan losses | 286 | 243 |  |
General Reserves on Loans Based on Historical Loss Experience | Unallocated |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Allowance for loan losses | 0 | 0 |  |
Reserves for Qualitative Factors |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Allowance for loan losses | 12,619 | 11,307 |  |
Reserves for Qualitative Factors | Commercial | Real estate |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Allowance for loan losses | 5,142 | 4,494 |  |
Reserves for Qualitative Factors | Commercial | Construction |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Allowance for loan losses | 690 | 616 |  |
Reserves for Qualitative Factors | Commercial | Other |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Allowance for loan losses | 2,353 | 2,067 |  |
Reserves for Qualitative Factors | Municipal |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Allowance for loan losses | 162 | 157 |  |
Reserves for Qualitative Factors | Residential | Construction |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Allowance for loan losses | 192 | 138 |  |
Reserves for Qualitative Factors | Residential | Term |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Allowance for loan losses | 2,376 | 2,421 |  |
Reserves for Qualitative Factors | Home equity line of credit |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Allowance for loan losses | 928 | 824 |  |
Reserves for Qualitative Factors | Consumer |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Allowance for loan losses | 776 | 590 |  |
Reserves for Qualitative Factors | Unallocated |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Allowance for loan losses | 0 | 0 |  |
Unallocated Reserves |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Allowance for loan losses | 1,678 | 1,782 |  |
Unallocated Reserves | Commercial | Real estate |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Allowance for loan losses | 0 | 0 |  |
Unallocated Reserves | Commercial | Construction |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Allowance for loan losses | 0 | 0 |  |
Unallocated Reserves | Commercial | Other |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Allowance for loan losses | 0 | 0 |  |
Unallocated Reserves | Municipal |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Allowance for loan losses | 0 | 0 |  |
Unallocated Reserves | Residential | Construction |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Allowance for loan losses | 0 | 0 |  |
Unallocated Reserves | Residential | Term |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Allowance for loan losses | 0 | 0 |  |
Unallocated Reserves | Home equity line of credit |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Allowance for loan losses | 0 | 0 |  |
Unallocated Reserves | Consumer |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Allowance for loan losses | 0 | 0 |  |
Unallocated Reserves | Unallocated |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Allowance for loan losses | $ 1,678 | $ 1,782 |  |

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 excluding accrued interest, of allowance for credit loss on financing receivable. Excludes net investment in lease. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 326 -SubTopic 20 -Section 45 -Paragraph 1 -URI https://asc.fasb.org/extlink&oid=124255206&loc=SL82895884-210446 + Details
Name: | us-gaap_FinancingReceivableAllowanceForCreditLossExcludingAccruedInterest
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

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_RealEstateLoanMember
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=fnlc_OtherLoansMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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

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

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

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

X
- Details
Name: | fnlc_FinancingReceivableInformationByTypeOfReserveAxis=fnlc_ReserveForQualitativeFactorsMember
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: |