XML 62 R52.htm IDEA: XBRL DOCUMENT
v3.23.3

Loans - TDR's by Class and Specific Reserves (Details) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2022 USD ($) loan
Accounts, Notes, Loans and Financing Receivable [Line Items] |
Number of Loans | loan | 29
Balance | $ 4,744
Specific Reserves | $ 181
Commercial | Real Estate |
Accounts, Notes, Loans and Financing Receivable [Line Items] |
Number of Loans | loan | 5
Balance | $ 1,044
Specific Reserves | $ 0
Commercial | Construction |
Accounts, Notes, Loans and Financing Receivable [Line Items] |
Number of Loans | loan | 1
Balance | $ 661
Specific Reserves | $ 0
Commercial | Other |
Accounts, Notes, Loans and Financing Receivable [Line Items] |
Number of Loans | loan | 3
Balance | $ 361
Specific Reserves | $ 81
Municipal |
Accounts, Notes, Loans and Financing Receivable [Line Items] |
Number of Loans | loan | 0
Balance | $ 0
Specific Reserves | $ 0
Residential | Construction |
Accounts, Notes, Loans and Financing Receivable [Line Items] |
Number of Loans | loan | 0
Balance | $ 0
Specific Reserves | $ 0
Residential | Term |
Accounts, Notes, Loans and Financing Receivable [Line Items] |
Number of Loans | loan | 20
Balance | $ 2,678
Specific Reserves | $ 100
Home Equity |
Accounts, Notes, Loans and Financing Receivable [Line Items] |
Number of Loans | loan | 0
Balance | $ 0
Specific Reserves | $ 0
Consumer |
Accounts, Notes, Loans and Financing Receivable [Line Items] |
Number of Loans | loan | 0
Balance | $ 0
Specific Reserves | $ 0

X
- Definition Specific allowance for loan and lease losses on receivable financings that are classified as troubled debt restructurings. + References No definition available. + Details
Name: | fnlc_TroubledDebtRestructuringFinancingReceivableSpecificAllowance
Namespace Prefix: | fnlc_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
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 Number of financing receivables that have been modified by troubled debt restructurings. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 310 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 33 -Publisher FASB -URI https://asc.fasb.org//1943274/2147481962/310-10-50-33 + Details
Name: | us-gaap_FinancingReceivableModificationsNumberOfContracts2
Namespace Prefix: | us-gaap_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | duration

X
- Definition Accumulated amortized cost of financing receivable modified for debtor experiencing financial difficulty. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 310 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 42 -Subparagraph (a)(1) -Publisher FASB -URI https://asc.fasb.org//1943274/2147481962/310-10-50-42 Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 310 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 33 -Publisher FASB -URI https://asc.fasb.org//1943274/2147481962/310-10-50-33 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 310 -SubTopic 40 -Name Accounting Standards Codification -Section 50 -Paragraph 4 -Publisher FASB -URI https://asc.fasb.org//1943274/2147481746/310-40-50-4 + Details
Name: | us-gaap_FinancingReceivableModificationsRecordedInvestment
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
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_MunicipalPortfolioSegmentMember
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: |