XML 46 R35.htm IDEA: XBRL DOCUMENT
v3.10.0.1

Certificates of Deposit (Tables) | 9 Months Ended
--- | ---
Sep. 30, 2018
Banking and Thrift [Abstract] |
Certificates of Deposit | The following table represents the breakdown of certificates of deposit at September 30, 2018 and 2017, and at December 31, 2017:
| September 30, 2018 |  | December 31, 2017 |  | September 30, 2017
Certificates of deposit < $100,000 | $ | 389,317,000 |  |  | $ | 284,066,000 |  |  | $ | 250,865,000 |
Certificates $100,000 to $250,000 | 168,402,000 |  |  | 232,759,000 |  |  | 202,722,000 |
Certificates $250,000 and over | 61,690,000 |  |  | 42,176,000 |  |  | 43,257,000 |
| $ | 619,409,000 |  |  | $ | 559,001,000 |  |  | $ | 496,844,000 |

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