XML 77 R66.htm IDEA: XBRL DOCUMENT
v3.25.1

Financial Derivative Instruments (Details) | Mar. 31, 2025 USD ($) derivative | Dec. 31, 2024 USD ($) derivative | Mar. 31, 2024 USD ($) derivative
--- | --- | --- | ---
Interest rate swap agreements | Designated as Hedging Instrument |  |  |
Derivative [Line Items] |  |  |
Notional Amount | $ 225,000,000 | $ 225,000,000 | $ 235,000,000
Fair Value | (1,016,000) | (560,000) | 618,000
Customer loan interest swap agreements |  |  |
Derivative [Line Items] |  |  |
Collateral posted | 0 |  |
Cash Flow Hedging | Interest rate swap agreements | Designated as Hedging Instrument |  |  |
Derivative [Line Items] |  |  |
Notional Amount | 75,000,000 | 75,000,000 | 85,000,000
Fair Value | $ 104,000 | 198,000 | 931,000
Cash Flow Hedging | Interest Rate Swap April 27 2024 | Designated as Hedging Instrument |  |  |
Derivative [Line Items] |  |  |
Fixed Rate Paid | 2.619% |  |
Cash Flow Hedging | Interest Rate Swap April 27 2024 | Designated as Hedging Instrument | Other Assets |  |  |
Derivative [Line Items] |  |  |
Notional Amount | $ 0 | 0 | 10,000,000
Fair Value | $ 0 | 0 | 21,000
Cash Flow Hedging | Interest Rate Swap January 01 2026 | Designated as Hedging Instrument |  |  |
Derivative [Line Items] |  |  |
Fixed Rate Paid | 3.836% |  |
Cash Flow Hedging | Interest Rate Swap January 01 2026 | Designated as Hedging Instrument | Other Assets |  |  |
Derivative [Line Items] |  |  |
Notional Amount | $ 75,000,000 | 75,000,000 | 75,000,000
Fair Value | $ 104,000 | $ 198,000 | $ 910,000
Cash Flow Hedging | Customer loan interest swap agreements | Designated as Hedging Instrument |  |  |
Derivative [Line Items] |  |  |
Number of Positions | derivative | 12 | 10 | 7
Cash Flow Hedging | Customer loan interest swap agreements | Not Designated as Hedging Instrument |  |  |
Derivative [Line Items] |  |  |
Notional Amount | $ 116,258,000 | $ 95,514,000 | $ 81,186,000
Fair Value | $ 0 | $ 0 | $ 0
Number of Positions | derivative | 24 | 20 | 14
Cash Flow Hedging | Customer loan interest swap agreements | Not Designated as Hedging Instrument | Pay Fixed, Receive Variable |  |  |
Derivative [Line Items] |  |  |
Notional Amount | $ 58,129,000 | $ 47,757,000 | $ 40,593,000
Fair Value | $ 3,652,000 | $ 4,685,000 | $ 4,778,000
Number of Positions | derivative | 12 | 10 | 7
Cash Flow Hedging | Customer loan interest swap agreements | Not Designated as Hedging Instrument | Receive Fixed, Pay Variable |  |  |
Derivative [Line Items] |  |  |
Notional Amount | $ 58,129,000 | $ 47,757,000 | $ 40,593,000
Fair Value | $ (3,652,000) | $ (4,685,000) | $ (4,778,000)
Number of Positions | derivative | 12 | 10 | 7
Cash Flow Hedging | Customer loan interest swap agreements | Not Designated as Hedging Instrument | Other Assets | Pay Fixed, Receive Variable |  |  |
Derivative [Line Items] |  |  |
Notional Amount | $ 34,398,000 | $ 43,415,000 | $ 40,593,000
Fair Value | $ 4,078,000 | $ 4,772,000 | $ 4,778,000
Number of Positions | derivative | 6 | 8 | 7
Cash Flow Hedging | Customer loan interest swap agreements | Not Designated as Hedging Instrument | Other Assets | Receive Fixed, Pay Variable |  |  |
Derivative [Line Items] |  |  |
Notional Amount | $ 23,731,000 | $ 4,342,000 | $ 0
Fair Value | $ 426,000 | $ 87,000 | $ 0
Number of Positions | derivative | 6 | 2 | 0
Cash Flow Hedging | Customer loan interest swap agreements | Not Designated as Hedging Instrument | Other Liabilities | Pay Fixed, Receive Variable |  |  |
Derivative [Line Items] |  |  |
Notional Amount | $ 23,731,000 | $ 4,342,000 | $ 0
Fair Value | $ (426,000) | $ (87,000) | $ 0
Number of Positions | derivative | 6 | 2 | 0
Cash Flow Hedging | Customer loan interest swap agreements | Not Designated as Hedging Instrument | Other Liabilities | Receive Fixed, Pay Variable |  |  |
Derivative [Line Items] |  |  |
Notional Amount | $ 34,398,000 | $ 43,415,000 | $ 40,593,000
Fair Value | $ (4,078,000) | $ (4,772,000) | $ (4,778,000)
Number of Positions | derivative | 6 | 8 | 7
Fair Value Hedging | Interest rate swap agreements | Designated as Hedging Instrument |  |  |
Derivative [Line Items] |  |  |
Notional Amount | $ 150,000,000 | $ 150,000,000 | $ 150,000,000
Fair Value | $ (1,120,000) | (758,000) | (313,000)
Fair Value Hedging | Interest Rate Swap March 01 2026 | Designated as Hedging Instrument |  |  |
Derivative [Line Items] |  |  |
Fixed Rate Paid | 4.712% |  |
Fair Value Hedging | Interest Rate Swap March 01 2026 | Designated as Hedging Instrument | Other Liabilities |  |  |
Derivative [Line Items] |  |  |
Notional Amount | $ 40,000,000 | 40,000,000 | 40,000,000
Fair Value | $ (256,000) | (270,000) | (126,000)
Fair Value Hedging | Interest Rate Swap March 01 2027 | Designated as Hedging Instrument |  |  |
Derivative [Line Items] |  |  |
Fixed Rate Paid | 4.402% |  |
Fair Value Hedging | Interest Rate Swap March 01 2027 | Designated as Hedging Instrument | Other Liabilities |  |  |
Derivative [Line Items] |  |  |
Notional Amount | $ 30,000,000 | 30,000,000 | 30,000,000
Fair Value | $ (367,000) | (216,000) | (132,000)
Fair Value Hedging | Interest Rate Swap March 01 2028 | Designated as Hedging Instrument |  |  |
Derivative [Line Items] |  |  |
Fixed Rate Paid | 4.189% |  |
Fair Value Hedging | Interest Rate Swap March 01 2028 | Designated as Hedging Instrument | Other Liabilities |  |  |
Derivative [Line Items] |  |  |
Notional Amount | $ 30,000,000 | 30,000,000 | 30,000,000
Fair Value | $ (431,000) | (137,000) | (127,000)
Fair Value Hedging | Interest Rate Swap August 01 2025 | Designated as Hedging Instrument |  |  |
Derivative [Line Items] |  |  |
Fixed Rate Paid | 4.703% |  |
Fair Value Hedging | Interest Rate Swap August 01 2025 | Designated as Hedging Instrument | Other Assets |  |  |
Derivative [Line Items] |  |  |
Notional Amount |  |  | 50,000,000
Fair Value |  |  | $ 72,000
Fair Value Hedging | Interest Rate Swap August 01 2025 | Designated as Hedging Instrument | Other Liabilities |  |  |
Derivative [Line Items] |  |  |
Notional Amount | $ 50,000,000 | 50,000,000 |
Fair Value | $ (66,000) | $ (135,000) |

X
- Definition Amount of obligation to return cash collateral under master netting arrangements that have not been offset against derivative assets. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Section 55 -Paragraph 13 -SubTopic 20 -Topic 210 -Publisher FASB -URI https://asc.fasb.org/1943274/2147483444/210-20-55-13 Reference 2: http://www.xbrl.org/2003/role/exampleRef -Topic 210 -SubTopic 20 -Name Accounting Standards Codification -Section 55 -Paragraph 20 -Publisher FASB -URI https://asc.fasb.org/1943274/2147483444/210-20-55-20 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Topic 210 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 3 -Subparagraph (d)(2) -Publisher FASB -URI https://asc.fasb.org/1943274/2147483466/210-20-50-3 Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 8 -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480434/815-10-50-8 + Details
Name: | us-gaap_DerivativeCollateralObligationToReturnCash
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Fair value of the assets less the liabilities of a derivative or group of derivatives. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 825 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 10 -Publisher FASB -URI https://asc.fasb.org/1943274/2147482907/825-10-50-10 + Details
Name: | us-gaap_DerivativeFairValueOfDerivativeNet
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Fixed interest rate related to the interest rate derivative. + References No definition available. + Details
Name: | us-gaap_DerivativeFixedInterestRate
Namespace Prefix: | us-gaap_
Data Type: | dtr-types: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 Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 815 -SubTopic 40 -Name Accounting Standards Codification -Section 50 -Paragraph 5 -Subparagraph (f) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480237/815-40-50-5 + Details
Name: | us-gaap_DerivativeLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Nominal or face amount used to calculate payment on derivative. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 815 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 1B -Publisher FASB -URI https://asc.fasb.org/1943274/2147480434/815-10-50-1B Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 815 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 1A -Subparagraph (d) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480434/815-10-50-1A + Details
Name: | us-gaap_DerivativeNotionalAmount
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | na
Period Type: | instant

X
- Definition The number of derivative instruments of a particular group held by the entity. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 946 -SubTopic 210 -Name Accounting Standards Codification -Section 50 -Paragraph 6 -Subparagraph (e) -Publisher FASB -URI https://asc.fasb.org/1943274/2147478795/946-210-50-6 Reference 2: http://www.xbrl.org/2003/role/exampleRef -Topic 946 -SubTopic 210 -Name Accounting Standards Codification -Section 55 -Paragraph 1 -Publisher FASB -URI https://asc.fasb.org/1943274/2147477439/946-210-55-1 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Topic 946 -SubTopic 320 -Name Accounting Standards Codification -Section S99 -Paragraph 5 -Subparagraph (SX 210.12-13(Column A)(Footnote 3)) -Publisher FASB -URI https://asc.fasb.org/1943274/2147477271/946-320-S99-5 Reference 4: http://www.xbrl.org/2003/role/disclosureRef -Topic 946 -SubTopic 320 -Name Accounting Standards Codification -Section S99 -Paragraph 5 -Subparagraph (SX 210.12-13(Column C)) -Publisher FASB -URI https://asc.fasb.org/1943274/2147477271/946-320-S99-5 Reference 5: http://www.xbrl.org/2003/role/disclosureRef -Topic 946 -SubTopic 320 -Name Accounting Standards Codification -Section S99 -Paragraph 5A -Subparagraph (SX 210.12-13A(Column B)) -Publisher FASB -URI https://asc.fasb.org/1943274/2147477271/946-320-S99-5A Reference 6: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 1B -Publisher FASB -URI https://asc.fasb.org/1943274/2147480434/815-10-50-1B Reference 7: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 1A -Subparagraph (d) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480434/815-10-50-1A + Details
Name: | us-gaap_DerivativeNumberOfInstrumentsHeld
Namespace Prefix: | us-gaap_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | instant

X
- Details
Name: | us-gaap_DerivativeInstrumentRiskAxis=us-gaap_InterestRateSwapMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_HedgingDesignationAxis=us-gaap_DesignatedAsHedgingInstrumentMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DerivativeInstrumentRiskAxis=fnlc_CustomerLoanInterestSwapMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DerivativeInstrumentsGainLossByHedgingRelationshipAxis=us-gaap_CashFlowHedgingMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DerivativeInstrumentRiskAxis=fnlc_InterestRateSwapApril272024Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_BalanceSheetLocationAxis=us-gaap_OtherAssetsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DerivativeInstrumentRiskAxis=fnlc_InterestRateSwapJanuary012026Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_HedgingDesignationAxis=us-gaap_NondesignatedMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | fnlc_DerivativeSwapTypeAxis=fnlc_PayFixedReceiveVariableMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | fnlc_DerivativeSwapTypeAxis=fnlc_ReceiveFixedPayVariableMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_BalanceSheetLocationAxis=us-gaap_OtherLiabilitiesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DerivativeInstrumentsGainLossByHedgingRelationshipAxis=us-gaap_FairValueHedgingMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DerivativeInstrumentRiskAxis=fnlc_InterestRateSwapMarch012026Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DerivativeInstrumentRiskAxis=fnlc_InterestRateSwapMarch012027Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DerivativeInstrumentRiskAxis=fnlc_InterestRateSwapMarch012028Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DerivativeInstrumentRiskAxis=fnlc_InterestRateSwapAugust012025Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |