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v3.20.4

Loans - Summary of Loans to Directors and Executive Officers (Details) - USD ($) $ in Thousands | 12 Months Ended
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Dec. 31, 2020 | Dec. 31, 2019
Loans and Leases Receivable, Related Parties [Roll Forward] |  |
Beginning balance | $ 21,134 | $ 22,149
New loans | 3,544 | 521
Repayments | (3,138) | (1,536)
Retired director | (326) | 0
Ending balance | $ 21,214 | $ 21,134

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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_
Data Type: | xbrli:monetaryItemType
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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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Namespace Prefix: | fnlc_
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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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