Impaired Financing Receivable, Related Allowance, Measured at Fair Value

No definition available.

Name:	fnlc_ImpairedFinancingReceivableRelatedAllowanceMeasuredatFairValue
Namespace Prefix:	fnlc_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

This element represents the fair value disclosure of impaired loans that have had a fair value adjustment since their initial recognition.

+ References

No definition available.

+ Details

Name:	fnlc_ImpairedLoansFairValueDisclosure
Namespace Prefix:	fnlc_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

This element represents the portion of the balance sheet assertion valued at fair value by the entity whether such amount is presented as a separate caption or as a parenthetical disclosure. Additionally, this element may be used in connection with the fair value disclosures required in the footnote disclosures to the financial statements. The element may be used in both the balance sheet and disclosure in the same submission. This item represents other equity securities not previously disclosed.

+ References

No definition available.

+ Details

Name:	fnlc_OtherEquitySecuritiesAvailableForSaleFairValueDisclosure
Namespace Prefix:	fnlc_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

This element represents the fair value disclosure of other real estate owned that have had a fair value adjustment since their initial recognition.

+ References

No definition available.

+ Details

Name:	fnlc_OtherRealEstateOwnedFairValueDisclosure
Namespace Prefix:	fnlc_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

This element represents a certain statement of financial position asset caption which represents a class of assets, or which may include an individual asset, measured at fair value on a recurring basis.

+ References

No definition available.

+ Details

Name:	fnlc_StateAndMunicipalSecuritiesAvailableForSaleFairValueDisclosure
Namespace Prefix:	fnlc_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Fair value portion of probable future economic benefits obtained or controlled by an entity as a result of past transactions or events.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 820

-SubTopic 10

-Section 50

-Paragraph 2

-Subparagraph (a)

-URI http://asc.fasb.org/extlink&oid=25499696&loc=d3e19207-110258

+ Details

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

- Details

Name:	us-gaap_AssetsFairValueDisclosureAbstract
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

Amount of allowance for credit losses related to recorded investment.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 310

-SubTopic 10

-Section 50

-Paragraph 15

-Subparagraph (a)(3)

-URI http://asc.fasb.org/extlink&oid=28368275&loc=d3e5212-111524

+ Details

Name:	us-gaap_ImpairedFinancingReceivableRelatedAllowance
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Fair value portion of loans held-for-sale including, but not limited to, mortgage loans and finance receivables.

+ References

No definition available.

+ Details

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

- Definition

Fair value of securitized, pay-through debt securities collateralized by real estate mortgage loans classified as available-for-sale.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Glossary Mortgage-Backed Securities

-URI http://asc.fasb.org/extlink&oid=6517959

+ Details

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

- Definition

For each period for which an income statement is required, disclosure of the changes in the allowance, including balances at end of period.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 942

-SubTopic 210

-Section S99

-Paragraph 1

-Subparagraph (SX 210.9-03.10(4))

-URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 03

-Paragraph 10

-Subparagraph 4

-Article 9

+ Details

Name:	us-gaap_RealEstateOwnedValuationAllowance
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- 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

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

Fair Value Disclosures (Details) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2009
Securities available for sale, Fair value disclosure
Allowance for Other Real Estate Owned	$ 330	$ 373	$ 436	$ 132
Impaired Financing Receivable, Related Allowance, Measured at Fair Value	1,309	3,539
Allowance for loan losses	2,461	3,539	2,058
Mortgage servicing rights	1,948	1,228
Fair Value, Inputs, Level 1
Securities available for sale, Fair value disclosure
Mortgage servicing rights	0	0
Loans held for sale	0	0
Fair Value, Inputs, Level 2
Securities available for sale, Fair value disclosure
Mortgage servicing rights	1,948	1,228
Loans held for sale	83	1,035
Fair Value, Inputs, Level 3
Securities available for sale, Fair value disclosure
Mortgage servicing rights	0	0
Loans held for sale	0	0
Fair Value, Measurements, Recurring
Securities available for sale, Fair value disclosure
Mortgage-backed securities	177,729	169,093
State and municipal bonds	126,315	120,944
Other equity securities	1,780	1,577
Total assets	305,824	291,614
Fair Value, Measurements, Recurring \| Fair Value, Inputs, Level 1
Securities available for sale, Fair value disclosure
Mortgage-backed securities	0	0
State and municipal bonds	0	0
Other equity securities	0	0
Total assets	0	0
Fair Value, Measurements, Recurring \| Fair Value, Inputs, Level 2
Securities available for sale, Fair value disclosure
Mortgage-backed securities	177,729	169,093
State and municipal bonds	126,315	120,944
Other equity securities	1,780	1,577
Total assets	305,824	291,614
Fair Value, Measurements, Recurring \| Fair Value, Inputs, Level 3
Securities available for sale, Fair value disclosure
Mortgage-backed securities	0	0
State and municipal bonds	0	0
Other equity securities	0	0
Total assets	0	0
Fair Value, Measurements, Nonrecurring
Securities available for sale, Fair value disclosure
Total assets	5,923	21,516
Other real estate owned	4,807	7,593
Impaired loans	1,116	13,923
Fair Value, Measurements, Nonrecurring \| Fair Value, Inputs, Level 1
Securities available for sale, Fair value disclosure
Total assets	0	0
Other real estate owned	0	0
Impaired loans	0	0
Fair Value, Measurements, Nonrecurring \| Fair Value, Inputs, Level 2
Securities available for sale, Fair value disclosure
Total assets	5,923	21,516
Other real estate owned	4,807	7,593
Impaired loans	1,116	13,923
Fair Value, Measurements, Nonrecurring \| Fair Value, Inputs, Level 3
Securities available for sale, Fair value disclosure
Total assets	0	0
Other real estate owned	0	0
Impaired loans	$ 0	$ 0