XML 46 R35.htm IDEA: XBRL DOCUMENT
v3.19.1

Certificates of Deposit (Tables) | 3 Months Ended
--- | ---
Mar. 31, 2019
Banking and Thrift [Abstract] |
Certificates of Deposit | The following table represents the breakdown of certificates of deposit at March 31, 2019 and 2018, and at December 31, 2018:
| March 31, 2019 |  | December 31, 2018 |  | March 31, 2018
Certificates of deposit < $100,000 | $ | 398,689,000 |  |  | $ | 372,464,000 |  |  | $ | 347,010,000 |
Certificates $100,000 to $250,000 | 238,429,000 |  |  | 162,185,000 |  |  | 240,492,000 |
Certificates $250,000 and over | 75,358,000 |  |  | 56,760,000 |  |  | 47,245,000 |
| $ | 712,476,000 |  |  | $ | 591,409,000 |  |  | $ | 634,747,000 |

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: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration

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