XML 48 R37.htm IDEA: XBRL DOCUMENT
v3.25.2

Certificates of Deposit (Tables) | 6 Months Ended
--- | ---
Jun. 30, 2025
Deposits [Abstract] |
Schedule of Certificates of Deposit | The following table represents the breakdown of certificates of deposit at June 30, 2025 and 2024, and at December 31, 2024:
| June 30, 2025 | December 31, 2024 | June 30, 2024
Certificates of deposit < $100,000 | $ | 774,521,000 |  | $ | 702,632,000 |  | $ | 728,410,000 |
Certificates $100,000 to $250,000 | 231,926,000 |  | 225,106,000 |  | 219,732,000 |
Certificates $250,000 and over | 172,406,000 |  | 187,073,000 |  | 163,597,000 |
| $ | 1,178,853,000 |  | $ | 1,114,811,000 |  | $ | 1,111,739,000 |

X
- Definition The tabular disclosure of the breakdown of the balance of time deposits. + References No definition available. + Details
Name: | fnlc_TimeDepositsTableTextBlock
Namespace Prefix: | fnlc_
Data Type: | dtr-types:textBlockItemType
Balance Type: | na
Period Type: | duration

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