XML 93 R79.htm IDEA: XBRL DOCUMENT
v3.20.4

Allowance for Loan Losses - Financing Receivable and Allowance Element by Class (Details) - USD ($) $ in Thousands | Dec. 31, 2020 | Dec. 31, 2019 | Dec. 31, 2018 | Dec. 31, 2017
--- | --- | --- | --- | ---
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Less allowance for loan losses | $ 16,253 | $ 11,639 | $ 11,232 | $ 10,729
Commercial | Real estate |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Less allowance for loan losses | 5,178 | 3,742 | 3,567 | 3,872
Commercial | Construction |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Less allowance for loan losses | 662 | 365 | 255 | 434
Commercial | Other |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Less allowance for loan losses | 3,438 | 3,329 | 3,541 | 3,358
Municipal |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Less allowance for loan losses | 171 | 27 | 24 | 20
Residential | Construction |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Less allowance for loan losses | 102 | 25 | 34 | 36
Residential | Term |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Less allowance for loan losses | 2,579 | 1,024 | 1,235 | 1,130
Home equity line of credit |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Less allowance for loan losses | 1,211 | 1,078 | 730 | 692
Consumer |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Less allowance for loan losses | 778 | 867 | 630 | 545
Unallocated |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Less allowance for loan losses | 2,134 | 1,182 | $ 1,216 | $ 642
Specific Reserves on Loans Evaluated Individually for Impairment |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Less allowance for loan losses | 462 | 2,213 |  |
Specific Reserves on Loans Evaluated Individually for Impairment | Commercial | Real estate |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Less allowance for loan losses | 112 | 251 |  |
Specific Reserves on Loans Evaluated Individually for Impairment | Commercial | Construction |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Less allowance for loan losses | 18 | 0 |  |
Specific Reserves on Loans Evaluated Individually for Impairment | Commercial | Other |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Less allowance for loan losses | 169 | 1,273 |  |
Specific Reserves on Loans Evaluated Individually for Impairment | Municipal |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Less allowance for loan losses | 0 | 0 |  |
Specific Reserves on Loans Evaluated Individually for Impairment | Residential | Construction |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Less allowance for loan losses | 0 | 0 |  |
Specific Reserves on Loans Evaluated Individually for Impairment | Residential | Term |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Less allowance for loan losses | 163 | 237 |  |
Specific Reserves on Loans Evaluated Individually for Impairment | Home equity line of credit |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Less allowance for loan losses | 0 | 447 |  |
Specific Reserves on Loans Evaluated Individually for Impairment | Consumer |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Less allowance for loan losses | 0 | 5 |  |
Specific Reserves on Loans Evaluated Individually for Impairment | Unallocated |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Less allowance for loan losses | 0 | 0 |  |
General Reserves on Loans Based on Historical Loss Experience |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Less allowance for loan losses | 1,862 | 1,983 |  |
General Reserves on Loans Based on Historical Loss Experience | Commercial | Real estate |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Less allowance for loan losses | 721 | 729 |  |
General Reserves on Loans Based on Historical Loss Experience | Commercial | Construction |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Less allowance for loan losses | 92 | 76 |  |
General Reserves on Loans Based on Historical Loss Experience | Commercial | Other |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Less allowance for loan losses | 465 | 430 |  |
General Reserves on Loans Based on Historical Loss Experience | Municipal |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Less 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] |  |  |  |
Less allowance for loan losses | 6 | 5 |  |
General Reserves on Loans Based on Historical Loss Experience | Residential | Term |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Less allowance for loan losses | 145 | 153 |  |
General Reserves on Loans Based on Historical Loss Experience | Home equity line of credit |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Less allowance for loan losses | 151 | 130 |  |
General Reserves on Loans Based on Historical Loss Experience | Consumer |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Less allowance for loan losses | 282 | 460 |  |
General Reserves on Loans Based on Historical Loss Experience | Unallocated |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Less allowance for loan losses | 0 | 0 |  |
Reserves for Qualitative Factors |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Less allowance for loan losses | 11,795 | 6,261 |  |
Reserves for Qualitative Factors | Commercial | Real estate |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Less allowance for loan losses | 4,345 | 2,762 |  |
Reserves for Qualitative Factors | Commercial | Construction |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Less allowance for loan losses | 552 | 289 |  |
Reserves for Qualitative Factors | Commercial | Other |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Less allowance for loan losses | 2,804 | 1,626 |  |
Reserves for Qualitative Factors | Municipal |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Less allowance for loan losses | 171 | 27 |  |
Reserves for Qualitative Factors | Residential | Construction |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Less allowance for loan losses | 96 | 20 |  |
Reserves for Qualitative Factors | Residential | Term |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Less allowance for loan losses | 2,271 | 634 |  |
Reserves for Qualitative Factors | Home equity line of credit |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Less allowance for loan losses | 1,060 | 501 |  |
Reserves for Qualitative Factors | Consumer |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Less allowance for loan losses | 496 | 402 |  |
Reserves for Qualitative Factors | Unallocated |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Less allowance for loan losses | 0 | 0 |  |
Unallocated Reserves |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Less allowance for loan losses | 2,134 | 1,182 |  |
Unallocated Reserves | Commercial | Real estate |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Less allowance for loan losses | 0 | 0 |  |
Unallocated Reserves | Commercial | Construction |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Less allowance for loan losses | 0 | 0 |  |
Unallocated Reserves | Commercial | Other |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Less allowance for loan losses | 0 | 0 |  |
Unallocated Reserves | Municipal |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Less allowance for loan losses | 0 | 0 |  |
Unallocated Reserves | Residential | Construction |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Less allowance for loan losses | 0 | 0 |  |
Unallocated Reserves | Residential | Term |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Less allowance for loan losses | 0 | 0 |  |
Unallocated Reserves | Home equity line of credit |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Less allowance for loan losses | 0 | 0 |  |
Unallocated Reserves | Consumer |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Less allowance for loan losses | 0 | 0 |  |
Unallocated Reserves | Unallocated |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Less allowance for loan losses | $ 2,134 | $ 1,182 |  |

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_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: |