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v2.4.1.9

Mortgage Servicing Rights (Details) (USD $) In Thousands, unless otherwise specified | 12 Months Ended
--- | ---
Dec. 31, 2014 | Dec. 31, 2013 | Dec. 31, 2012
Transfers and Servicing [Abstract] |  |  |
Outstanding principal balance of loans serviced for others | $ 214,086 fnlc_ResidentialMortgageLoansServicedForOthersOutstandingPrincipal | $ 211,634 fnlc_ResidentialMortgageLoansServicedForOthersOutstandingPrincipal |
Net gain from sale of loans | 496 fnlc_NetGainFromSaleOfLoans | 1,224 fnlc_NetGainFromSaleOfLoans | 1,141 fnlc_NetGainFromSaleOfLoans
Mortgage servicing rights capitalized | 345 us-gaap_ServicingAssetAtFairValueAdditions | 743 us-gaap_ServicingAssetAtFairValueAdditions |
Amortization of mortgage servicing rights | 428 us-gaap_AmortizationOfMortgageServicingRightsMSRs | 515 us-gaap_AmortizationOfMortgageServicingRightsMSRs |
Fair value of mortgage servicing rights | 2,088 us-gaap_ServicingAssetAtFairValueAmount | 1,948 us-gaap_ServicingAssetAtFairValueAmount |
Moving average of weekly prepayment data (in months) | 3 months |  |
Anticipated loan prepayment rate of servicing assets (in hundredths) | 11.38%us-gaap_ServicingAssetsAndServicingLiabilitiesAtFairValueAssumptionsUsedToEstimateFairValuePrepaymentSpeed |  |
Period used to determine average quarterly discount rate (in years) | 10 years |  |
Servicing assets and servicing liabilities at fair value, assumptions used to estimate fair value, discount rate adjustment factor (in hundredths) | 4.76%fnlc_ServicingAssetsAndServicingLiabilitiesAtFairValueAssumptionsUsedToEstimateFairValueDiscountRateAdjustmentFactor |  |
Summary of mortgage servicing rights [Abstract] |  |  |
Mortgage servicing rights | 6,039 fnlc_MortgageServicingRightsGross | 7,172 fnlc_MortgageServicingRightsGross |
Accumulated amortization | (4,949)fnlc_AccumulatedAmortizationMortgageServicingRights | (5,988)fnlc_AccumulatedAmortizationMortgageServicingRights |
Impairment reserve | (4)fnlc_ReserveForImpairmentOfMortgageServicingRights | (26)fnlc_ReserveForImpairmentOfMortgageServicingRights |
Mortgage Servicing Rights Net | $ 1,086 fnlc_MortgageServicingRightsNet | $ 1,158 fnlc_MortgageServicingRightsNet |

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- Definition The cumulative amount of amortization for mortgage servicing rights that has been recognized in the income statement. + References No definition available. + Details
Name: | fnlc_AccumulatedAmortizationMortgageServicingRights
Namespace Prefix: | fnlc_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

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- Definition The average quarterly discount rate period used as assumption in evaluating the carrying value of mortgage servicing rights. + References No definition available. + Details
Name: | fnlc_Averagequarterlydiscountrate
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Data Type: | xbrli:durationItemType
Balance Type: | na
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- Definition Gross amount, as of the balance sheet date, of mortgage servicing rights. + References No definition available. + Details
Name: | fnlc_MortgageServicingRightsGross
Namespace Prefix: | fnlc_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

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- Definition Net amount, as of the balance sheet date, of mortgage servicing rights. + References No definition available. + Details
Name: | fnlc_MortgageServicingRightsNet
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Data Type: | xbrli:monetaryItemType
Balance Type: | debit
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- Definition The moving average period of weekly prepayment data used as assumption in evaluating the carrying value of mortgage servicing rights. + References No definition available. + Details
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- Definition Net gain from the sale of loans held for sale. + References No definition available. + Details
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Data Type: | xbrli:monetaryItemType
Balance Type: | credit
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- Definition A reserve for the amount of expected decrease in the value of mortgage servicing rights which cannot be physically measured. + References No definition available. + Details
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Balance Type: | credit
Period Type: | instant

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- Definition Dollar amount of principal outstanding on loans being serviced for others at the balance sheet date. + References No definition available. + Details
Name: | fnlc_ResidentialMortgageLoansServicedForOthersOutstandingPrincipal
Namespace Prefix: | fnlc_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
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- Definition The amount of rate spread added to the ten-year US Treasury rate to derive the discount rate used in the fair value calculation for the loan servicing portfolio. + References No definition available. + Details
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- Definition The periodic amortization (in proportion to and over the period of estimated net servicing income or loss) of capitalized servicing rights, which contractually entitle the servicer to receive fees and ancillary revenues for performing billing, collection, disbursement and recordkeeping services in connection with a mortgage portfolio. As a noncash expense, this element is added back to net income when calculating cash provided by or used in operations using the indirect method. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3602-108585 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 860 -SubTopic 50 -Section 50 -Paragraph 4 -Subparagraph (a)(4) -URI http://asc.fasb.org/extlink&oid=7882072&loc=d3e122739-111746 + Details
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- Definition The value of new servicing assets, subsequently measured at fair value, acquired or created during the current period through purchases or from transfers of financial assets. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 860 -SubTopic 50 -Section 50 -Paragraph 3 -Subparagraph (a)(2) -URI http://asc.fasb.org/extlink&oid=7882072&loc=d3e122625-111746 + Details
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- Definition Fair value of an asset representing net future revenue from contractually specified servicing fees, late charges, and other ancillary revenues, in excess of future costs related to servicing arrangements. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 860 -SubTopic 50 -Section 50 -Paragraph 3 -Subparagraph (a)(1) -URI http://asc.fasb.org/extlink&oid=7882072&loc=d3e122625-111746 + Details
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- Definition Estimated rate of prepayments of principal on servicing assets and servicing liabilities. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 860 -SubTopic 50 -Section 50 -Paragraph 2 -Subparagraph (d) -URI http://asc.fasb.org/extlink&oid=7882072&loc=d3e122596-111746 + Details
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- Details
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