XML 63 R51.htm IDEA: XBRL DOCUMENT
v3.10.0.1

Off-Balance-Sheet Financial Instruments and Concentrations of Credit Risk (Tables) | 12 Months Ended
--- | ---
Dec. 31, 2018
Commitments and Contingencies Disclosure [Abstract] |
Off-Balance-Sheet Financial instruments | At December 31, 2018 and 2017, the Bank had the following off-balance-sheet financial instruments, whose contract amounts represent credit risk:
As of December 31, | 2018 |  | 2017
Unused lines, collateralized by residential real estate | $ | 83,421,000 |  |  | $ | 76,887,000 |
Other unused commitments | 60,033,000 |  |  | 62,771,000 |
Standby letters of credit | 3,590,000 |  |  | 3,497,000 |
Commitments to extend credit | 19,268,000 |  |  | 8,724,000 |
Total | $ | 166,312,000 |  |  | $ | 151,879,000 |

X
- Definition Tabular disclosure of the nature and terms of the financial instruments with off-balance sheet risk. + References No definition available. + Details
Name: | fnlc_OffBalanceSheetFinancialInstrumentsTableTextBlock
Namespace Prefix: | fnlc_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration

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