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v2.4.1.9

Borrowed Funds (Details) (USD $) | 12 Months Ended |  |  |  |  |  |
--- | --- | --- | --- | --- | --- | --- | ---
Dec. 31, 2014 | Dec. 31, 2013 | Sep. 30, 2014 | Jun. 30, 2014 | Mar. 31, 2014 | Sep. 30, 2013 | Jun. 30, 2013 | Mar. 31, 2013
Debt Instrument [Line Items] |  |  |  |  |  |  |  |
Federal Home Loan Bank, Advances, Interest Rate, Maturities Summary, Due in Year Five | 0.00%fnlc_FederalHomeLoanBankAdvancesInterestRateMaturitiesSummaryDueinYearFive |  |  |  |  |  |  |
Federal Home Loan Bank, Advances, Interest Rate, Maturities Summary, Due Thereafter | 0.00%fnlc_FederalHomeLoanBankAdvancesInterestRateMaturitiesSummaryDueThereafter | 0.00%fnlc_FederalHomeLoanBankAdvancesInterestRateMaturitiesSummaryDueThereafter |  |  |  |  |  |
Disclosure of Repurchase Agreements [Abstract] |  |  |  |  |  |  |  |
Federal Home Loan Bank, Advances, General Debt Obligations, Disclosures, Maximum Amount Available | $ 232,000,000 us-gaap_FederalHomeLoanBankAdvancesGeneralDebtObligationsDisclosuresMaximumAmountAvailable |  |  |  |  |  |  |
Federal Home Loan Bank, Advances, General Debt Obligations, Disclosures, Amount of Available, Unused Funds | 26,800,000 us-gaap_FederalHomeLoanBankAdvancesGeneralDebtObligationsDisclosuresAmountOfAvailableUnusedFunds |  |  |  |  |  |  |
Range of Repurchase agreements' maturity dates | one to 365 |  |  |  |  |  |  |
Amount of Line of credit with correspondent banks | 48,000,000 fnlc_LineOfCreditWithCorrespondentBanks |  |  |  |  |  |  |
Credit facility with Federal Reserve Bank | 92,000,000 fnlc_CreditFacilityWithFederalReserveBankOfBoston |  |  |  |  |  |  |
Federal Home Loan Bank, Advances, Maturities Summary [Abstract] |  |  |  |  |  |  |  |
Due in Twelve Months Maturity | 115,050,000 us-gaap_FederalHomeLoanBankAdvancesMaturitiesSummaryDueWithinOneYearOfBalanceSheetDate | 54,500,000 us-gaap_FederalHomeLoanBankAdvancesMaturitiesSummaryDueWithinOneYearOfBalanceSheetDate |  |  |  |  |  |
Due in Year Two Maturity | 30,000,000 us-gaap_FederalHomeLoanBankAdvancesMaturitiesSummaryDueFromOneToTwoYearsOfBalanceSheetDate | 40,000,000 us-gaap_FederalHomeLoanBankAdvancesMaturitiesSummaryDueFromOneToTwoYearsOfBalanceSheetDate |  |  |  |  |  |
Due in Year Three Maturity | 30,000,000 us-gaap_FederalHomeLoanBankAdvancesMaturitiesSummaryDueFromTwoToThreeYearsOfBalanceSheetDate | 30,000,000 us-gaap_FederalHomeLoanBankAdvancesMaturitiesSummaryDueFromTwoToThreeYearsOfBalanceSheetDate |  |  |  |  |  |
Due in Year Four Maturity | 30,000,000 us-gaap_FederalHomeLoanBankAdvancesMaturitiesSummaryDueFromThreeToFourYearsOfBalanceSheetDate | 30,000,000 us-gaap_FederalHomeLoanBankAdvancesMaturitiesSummaryDueFromThreeToFourYearsOfBalanceSheetDate |  |  |  |  |  |
Due in Year Five Maturity | 0 us-gaap_FederalHomeLoanBankAdvancesMaturitiesSummaryDueFromFourToFiveYearsOfBalanceSheetDate | 30,000,000 us-gaap_FederalHomeLoanBankAdvancesMaturitiesSummaryDueFromFourToFiveYearsOfBalanceSheetDate |  |  |  |  |  |
Due Thereafter | 141,000 us-gaap_FederalHomeLoanBankAdvancesMaturitiesSummaryDueAfterFiveYearsOfBalanceSheetDate | 148,000 us-gaap_FederalHomeLoanBankAdvancesMaturitiesSummaryDueAfterFiveYearsOfBalanceSheetDate |  |  |  |  |  |
Total | 205,191,000 us-gaap_AdvancesFromFederalHomeLoanBanks | 184,648,000 us-gaap_AdvancesFromFederalHomeLoanBanks |  |  |  |  |  |
Repurchase Agreements for municipal and commercial customers | 74,725,000 us-gaap_SecuritiesSoldUnderAgreementsToRepurchase | 94,477,000 us-gaap_SecuritiesSoldUnderAgreementsToRepurchase |  |  |  |  |  |
Total | $ 279,916,000 fnlc_TotalFederalHomeLoanBankAdvancesTreasuryTaxNotesAndRepurchaseAgreements | $ 279,125,000 fnlc_TotalFederalHomeLoanBankAdvancesTreasuryTaxNotesAndRepurchaseAgreements | $ 258,636,000 fnlc_TotalFederalHomeLoanBankAdvancesTreasuryTaxNotesAndRepurchaseAgreements | $ 298,520,000 fnlc_TotalFederalHomeLoanBankAdvancesTreasuryTaxNotesAndRepurchaseAgreements | $ 253,519,000 fnlc_TotalFederalHomeLoanBankAdvancesTreasuryTaxNotesAndRepurchaseAgreements | $ 266,777,000 fnlc_TotalFederalHomeLoanBankAdvancesTreasuryTaxNotesAndRepurchaseAgreements | $ 257,108,000 fnlc_TotalFederalHomeLoanBankAdvancesTreasuryTaxNotesAndRepurchaseAgreements | $ 261,185,000 fnlc_TotalFederalHomeLoanBankAdvancesTreasuryTaxNotesAndRepurchaseAgreements
Minimum |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |
Repurchase Agreement Counterparty, Maturity of Agreements | 1 day |  |  |  |  |  |  |
Federal Home Loan Bank, Advances, Interest Rate, Maturities Summary, Due in Next Twelve Months | 0.22%fnlc_FederalHomeLoanBankAdvancesInterestRateMaturitiesSummaryDueinNextTwelveMonths / us-gaap_RangeAxis = us-gaap_MinimumMember | 0.28%fnlc_FederalHomeLoanBankAdvancesInterestRateMaturitiesSummaryDueinNextTwelveMonths / us-gaap_RangeAxis = us-gaap_MinimumMember |  |  |  |  |  |
Federal Home Loan Bank, Advances, Interest Rate, Maturities Summary, Due in Year Two | 2.36%fnlc_FederalHomeLoanBankAdvancesInterestRateMaturitiesSummaryDueinYearTwo / us-gaap_RangeAxis = us-gaap_MinimumMember | 2.03%fnlc_FederalHomeLoanBankAdvancesInterestRateMaturitiesSummaryDueinYearTwo / us-gaap_RangeAxis = us-gaap_MinimumMember |  |  |  |  |  |
Federal Home Loan Bank, Advances, Interest Rate, Maturities Summary, Due in Year Three | 0.99%fnlc_FederalHomeLoanBankAdvancesInterestRateMaturitiesSummaryDueinYearThree / us-gaap_RangeAxis = us-gaap_MinimumMember | 2.36%fnlc_FederalHomeLoanBankAdvancesInterestRateMaturitiesSummaryDueinYearThree / us-gaap_RangeAxis = us-gaap_MinimumMember |  |  |  |  |  |
Federal Home Loan Bank, Advances, Interest Rate, Maturities Summary, Due in Year Four | 2.25%fnlc_FederalHomeLoanBankAdvancesInterestRateMaturitiesSummaryDueinYearFour / us-gaap_RangeAxis = us-gaap_MinimumMember | 0.99%fnlc_FederalHomeLoanBankAdvancesInterestRateMaturitiesSummaryDueinYearFour / us-gaap_RangeAxis = us-gaap_MinimumMember |  |  |  |  |  |
Federal Home Loan Bank, Advances, Interest Rate, Maturities Summary, Due in Year Five |  | 2.25%fnlc_FederalHomeLoanBankAdvancesInterestRateMaturitiesSummaryDueinYearFive / us-gaap_RangeAxis = us-gaap_MinimumMember |  |  |  |  |  |
Securities Sold under Agreements to Repurchase, Stated Rate | 0.20%fnlc_SecuritiesSoldunderAgreementstoRepurchaseStatedRate / us-gaap_RangeAxis = us-gaap_MinimumMember | 0.20%fnlc_SecuritiesSoldunderAgreementstoRepurchaseStatedRate / us-gaap_RangeAxis = us-gaap_MinimumMember |  |  |  |  |  |
Maximum |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |
Repurchase Agreement Counterparty, Maturity of Agreements | 365 days |  |  |  |  |  |  |
Federal Home Loan Bank, Advances, Interest Rate, Maturities Summary, Due in Next Twelve Months | 2.98%fnlc_FederalHomeLoanBankAdvancesInterestRateMaturitiesSummaryDueinNextTwelveMonths / us-gaap_RangeAxis = us-gaap_MaximumMember | 3.20%fnlc_FederalHomeLoanBankAdvancesInterestRateMaturitiesSummaryDueinNextTwelveMonths / us-gaap_RangeAxis = us-gaap_MaximumMember |  |  |  |  |  |
Federal Home Loan Bank, Advances, Interest Rate, Maturities Summary, Due in Year Two | 2.44%fnlc_FederalHomeLoanBankAdvancesInterestRateMaturitiesSummaryDueinYearTwo / us-gaap_RangeAxis = us-gaap_MaximumMember | 2.98%fnlc_FederalHomeLoanBankAdvancesInterestRateMaturitiesSummaryDueinYearTwo / us-gaap_RangeAxis = us-gaap_MaximumMember |  |  |  |  |  |
Federal Home Loan Bank, Advances, Interest Rate, Maturities Summary, Due in Year Three | 3.69%fnlc_FederalHomeLoanBankAdvancesInterestRateMaturitiesSummaryDueinYearThree / us-gaap_RangeAxis = us-gaap_MaximumMember | 2.44%fnlc_FederalHomeLoanBankAdvancesInterestRateMaturitiesSummaryDueinYearThree / us-gaap_RangeAxis = us-gaap_MaximumMember |  |  |  |  |  |
Federal Home Loan Bank, Advances, Interest Rate, Maturities Summary, Due in Year Four | 3.25%fnlc_FederalHomeLoanBankAdvancesInterestRateMaturitiesSummaryDueinYearFour / us-gaap_RangeAxis = us-gaap_MaximumMember | 3.69%fnlc_FederalHomeLoanBankAdvancesInterestRateMaturitiesSummaryDueinYearFour / us-gaap_RangeAxis = us-gaap_MaximumMember |  |  |  |  |  |
Federal Home Loan Bank, Advances, Interest Rate, Maturities Summary, Due in Year Five |  | 3.25%fnlc_FederalHomeLoanBankAdvancesInterestRateMaturitiesSummaryDueinYearFive / us-gaap_RangeAxis = us-gaap_MaximumMember |  |  |  |  |  |
Securities Sold under Agreements to Repurchase, Stated Rate | 1.89%fnlc_SecuritiesSoldunderAgreementstoRepurchaseStatedRate / us-gaap_RangeAxis = us-gaap_MaximumMember | 1.89%fnlc_SecuritiesSoldunderAgreementstoRepurchaseStatedRate / us-gaap_RangeAxis = us-gaap_MaximumMember |  |  |  |  |  |

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- Definition Maximum borrowing capacity under the credit facility with Federal Reserve Bank of Boston using commercial and home equity loans as collateral. + References No definition available. + Details
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- Definition Represents the aggregate dollar amount of all future maturities of advances from the Federal Home Loan Bank, treasury tax and loan notes and securities sold under repurchase agreements as of balance sheet date. + References No definition available. + Details
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- Definition Amount of borrowings as of the balance sheet date from the Federal Home Loan Bank, which are primarily used to cover shortages in the required reserve balance and liquidity shortages. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 470 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6479118&loc=d3e64650-112822 + Details
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- Definition Amount of advances or credit lines available from the Federal Home Loan Bank (FHLB). + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 470 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6479118&loc=d3e64650-112822 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 22 -Article 5 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03.13(3)(a)) -URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.22 (b)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 03 -Paragraph 13 -Subparagraph 3(a) -Article 9 + Details
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- Definition Amount of maximum advances or credit lines available from the Federal Home Loan Bank (FHLB). + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 470 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6479118&loc=d3e64650-112822 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 22 -Subparagraph b -Article 5 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03.13(3)(a)) -URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.22 (b)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 03 -Paragraph 13 -Subparagraph 3(a) -Article 9 + Details
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- Definition Amount of federal home loan bank advances maturing after the fifth fiscal year following the latest fiscal year. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 470 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6479118&loc=d3e64650-112822 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 470 -SubTopic 10 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6802200&loc=d3e1835-112601 + Details
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- Definition Amount of federal home loan bank advances maturing in the second fiscal year following the latest fiscal year. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 470 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6479118&loc=d3e64650-112822 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 470 -SubTopic 10 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6802200&loc=d3e1835-112601 + Details
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- Definition Amount of federal home loan bank advances maturing in the third fiscal year following the latest fiscal year. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 470 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6479118&loc=d3e64650-112822 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 470 -SubTopic 10 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6802200&loc=d3e1835-112601 + Details
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- Definition Amount, after the effects of master netting arrangements, of funds outstanding borrowed in the form of a security resale agreement between the entity and another party for the purchase and resale of identical or substantially the same securities at a date certain for a specified price. Includes liabilities not subject to a master netting arrangement. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03.13(1)) -URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 20 -Section 50 -Paragraph 3 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=20225523&loc=SL20225862-175312 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 20 -Section 55 -Paragraph 10 -URI http://asc.fasb.org/extlink&oid=28370219&loc=SL20226008-175313 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 03 -Paragraph 13 -Subparagraph 1 -Article 9 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 20 -Section 45 -Paragraph 11 -URI http://asc.fasb.org/extlink&oid=7472769&loc=d3e9760-107771 Reference 6: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.4-08.(m)(1)(a)(i)) -URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e23780-122690 + Details
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