XML 17 R39.htm IDEA: XBRL DOCUMENT
v3.20.1

SECURITIES AVAILABLE FOR SALE - Narrative (Details) | 3 Months Ended
--- | ---
Mar. 31, 2020 security
US Government-sponsored enterprises |
Investment Holdings [Line Items] |
Available-for-sale, securities in unrealized loss positions (security) | 43
Available for sale securities portfolio, number of securities (security) | 675
Available for sale and held to maturity securities, continuous unrealized loss position, aggregate losses (percentage) | 3.83%
US Government agency |
Investment Holdings [Line Items] |
Available-for-sale, securities in unrealized loss positions (security) | 22
Available for sale securities portfolio, number of securities (security) | 179
Available for sale and held to maturity securities, continuous unrealized loss position, aggregate losses (percentage) | 1.18%
Private label |
Investment Holdings [Line Items] |
Available-for-sale, securities in unrealized loss positions (security) | 12
Available for sale securities portfolio, number of securities (security) | 19
Available for sale and held to maturity securities, continuous unrealized loss position, aggregate losses (percentage) | 8.80%
Obligations of states and political subdivisions thereof |
Investment Holdings [Line Items] |
Available-for-sale, securities in unrealized loss positions (security) | 10
Available for sale securities portfolio, number of securities (security) | 210
Available for sale and held to maturity securities, continuous unrealized loss position, aggregate losses (percentage) | 0.91%
Corporate bonds |
Investment Holdings [Line Items] |
Available-for-sale, securities in unrealized loss positions (security) | 12
Available for sale securities portfolio, number of securities (security) | 27
Available for sale and held to maturity securities, continuous unrealized loss position, aggregate losses (percentage) | 12.13%

X
- Definition Represents the aggregate unrealized losses, expressed as a percentage of the amortized cost of the securities in a continuous unrealized loss position categorized as held-to-maturity and available-for-sales securities. + References No definition available. + Details
Name: | bhb_AvailableForSaleAndHeldToMaturitySecuritiesContinuousUnrealizedLossPositionAggregateLossesPercentage
Namespace Prefix: | bhb_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition Represents the number of securities in the entity's portfolio of available-for-sale securities. + References No definition available. + Details
Name: | bhb_AvailableForSaleSecuritiesPortfolioNumberOfSecurities
Namespace Prefix: | bhb_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | duration

X
- Definition Number of investments in debt securities measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale), in unrealized loss position, without allowance for credit loss. Includes beneficial interest in securitized financial asset. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 6 -Subparagraph (b)(3) -URI http://asc.fasb.org/extlink&oid=118939692&loc=d3e27290-111563 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 326 -SubTopic 30 -Section 50 -Paragraph 4 -Subparagraph (b)(3) -URI http://asc.fasb.org/extlink&oid=118955579&loc=SL82922888-210455 + Details
Name: | us-gaap_DebtSecuritiesAvailableForSaleUnrealizedLossPositionNumberOfPositions
Namespace Prefix: | us-gaap_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | instant

X
- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
Name: | us-gaap_InvestmentHoldingsLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | us-gaap_FinancialInstrumentAxis=us-gaap_MortgageBackedSecuritiesIssuedByUSGovernmentSponsoredEnterprisesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancialInstrumentAxis=us-gaap_USGovernmentAgenciesDebtSecuritiesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancialInstrumentAxis=us-gaap_MortgageBackedSecuritiesIssuedByPrivateEnterprisesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancialInstrumentAxis=us-gaap_USStatesAndPoliticalSubdivisionsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancialInstrumentAxis=us-gaap_CorporateBondSecuritiesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |