XML 78 R67.htm IDEA: XBRL DOCUMENT
v3.25.2

Mortgage Servicing Rights - Schedule of Mortgage Servicing Rights (Details) - USD ($) $ in Thousands | Jun. 30, 2025 | Dec. 31, 2024 | Jun. 30, 2024
--- | --- | --- | ---
Transfers and Servicing [Abstract] |  |  |
Mortgage servicing rights | $ 8,768 | $ 8,741 | $ 8,709
Accumulated amortization | (6,991) | (6,847) | (6,690)
Carrying value | $ 1,777 | $ 1,894 | $ 2,019

X
- 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

X
- 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

X
- Definition Fair value of contract to service financial assets under which the benefits of servicing are expected to more than adequately compensate the servicer. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 860 -SubTopic 50 -Name Accounting Standards Codification -Section 50 -Paragraph 4 -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org/1943274/2147481229/860-50-50-4 + Details
Name: | us-gaap_ServicingAssetAtAmortizedValueFairValue
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- References No definition available. + Details
Name: | us-gaap_TransfersAndServicingAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration