XML 54 R43.htm IDEA: XBRL DOCUMENT v3.21.1

Loans - Loan Portfolio (Details) - USD ($) $ in Thousands	Mar. 31, 2021	Dec. 31, 2020	Mar. 31, 2020
Schedule of Financing Receivables [Line Items]
Loans	$ 1,516,772	$ 1,476,761	$ 1,344,208
Percentage of loans receivable, by type	100.00%	100.00%	100.00%
Commercial |    Real estate
Schedule of Financing Receivables [Line Items]
Loans	$ 469,974	$ 442,121	$ 382,753
Percentage of loans receivable, by type	31.00%	29.90%	28.50%
Commercial |    Construction
Schedule of Financing Receivables [Line Items]
Loans	$ 53,394	$ 56,565	$ 43,913
Percentage of loans receivable, by type	3.50%	3.80%	3.30%
Commercial |    Other
Schedule of Financing Receivables [Line Items]
Loans	$ 297,488	$ 285,015	$ 237,896
Percentage of loans receivable, by type	19.60%	19.30%	17.70%
Municipal
Schedule of Financing Receivables [Line Items]
Loans	$ 49,476	$ 43,783	$ 43,537
Percentage of loans receivable, by type	3.30%	3.00%	3.20%
Residential |    Construction
Schedule of Financing Receivables [Line Items]
Loans	$ 24,796	$ 21,600	$ 15,202
Percentage of loans receivable, by type	1.60%	1.50%	1.10%
Residential |    Term
Schedule of Financing Receivables [Line Items]
Loans	$ 520,317	$ 522,070	$ 500,971
Percentage of loans receivable, by type	34.30%	35.30%	37.30%
Home equity line of credit
Schedule of Financing Receivables [Line Items]
Loans	$ 77,210	$ 79,750	$ 90,674
Percentage of loans receivable, by type	5.10%	5.40%	6.70%
Consumer
Schedule of Financing Receivables [Line Items]
Loans	$ 24,117	$ 25,857	$ 29,262
Percentage of loans receivable, by type	1.60%	1.80%	2.20%

X

- Definition

Reflects the break down of the gross carrying amount of all categories of loans and leases held in the portfolio, after deducting deferred income, but before deducting the allowance for losses on loans and leases as a percentage of total portfolio.

+ References

No definition available.

+ Details

Name:	fnlc_PercentageOfFinancingReceivableByType
Namespace Prefix:	fnlc_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

X

- Definition

-- None. No documentation exists for this element. --

+ References

No definition available.

+ Details

Name:	fnlc_ScheduleOfFinancingReceivablesLineItems
Namespace Prefix:	fnlc_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Amount, before allowance for credit loss, of financing receivable.

+ References

Reference 1: http://www.xbrl.org/2003/role/exampleRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 326
-SubTopic 20
-Section 55
-Paragraph 79
-URI http://asc.fasb.org/extlink&oid=121647567&loc=SL82922352-210448

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 326
-SubTopic 20
-Section 50
-Paragraph 5
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=121599337&loc=SL82919230-210447

Reference 3: http://www.xbrl.org/2003/role/exampleRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 326
-SubTopic 20
-Section 55
-Paragraph 80
-URI http://asc.fasb.org/extlink&oid=121647567&loc=SL82922355-210448

+ Details

Name:	us-gaap_NotesReceivableGross
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

X

- Details

Name:	us-gaap_FinancingReceivablePortfolioSegmentAxis=us-gaap_CommercialPortfolioSegmentMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis=us-gaap_RealEstateLoanMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis=us-gaap_ConstructionLoansMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis=fnlc_OtherLoansMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_FinancingReceivablePortfolioSegmentAxis=fnlc_MunicipalPortfolioMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_FinancingReceivablePortfolioSegmentAxis=us-gaap_ResidentialPortfolioSegmentMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis=fnlc_TermLoanMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_FinancingReceivablePortfolioSegmentAxis=fnlc_HomeEquityLineOfCreditPortfolioMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_FinancingReceivablePortfolioSegmentAxis=us-gaap_ConsumerPortfolioSegmentMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: