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Loans - Summary of Loans to Directors and Executive Officers (Details) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2022 | Dec. 31, 2021
Loans and Leases Receivable, Related Parties [Roll Forward] |  |
Beginning balance | $ 26,307 | $ 21,214
New loans | 5,159 | 10,074
Repayments | (1,976) | (2,498)
Retired executive officers | 0 | (2,483)
Ending balance | $ 29,490 | $ 26,307

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- Definition Loans and Leases Receivables, Related Parties, Additions, Aggregated Over 60,000 Dollars + References No definition available. + Details
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- Definition Loans and Leases Receivables, Related Parties, Collections, Aggregated Over 60,000 Dollars + References No definition available. + Details
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Namespace Prefix: | fnlc_
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- Definition Loans and Leases Receivables, Related Parties, Retired Director, Aggregated Over 60,000 Dollars + References No definition available. + Details
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- Definition For an unclassified balance sheet, reflects the carrying amount of unpaid loan amounts which in aggregate exceed $60,000, due from related parties at the balance sheet date. + References No definition available. + Details
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- Definition A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period. + References No definition available. + Details
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Namespace Prefix: | us-gaap_
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