Combined Loan To Value Ratio Home Equity

No definition available.

Name:	bhb_CombinedLoanToValueRatioHomeEquity
Namespace Prefix:	bhb_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Financing Receivable Recorded Investment 30 Days Past Due And Still Accruing

+ References

No definition available.

+ Details

Name:	bhb_FinancingReceivableRecordedInvestment30DaysPastDueAndStillAccruing
Namespace Prefix:	bhb_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Financing Receivable Recorded Investment Non Accrual

+ References

No definition available.

+ Details

Name:	bhb_FinancingReceivableRecordedInvestmentNonAccrual
Namespace Prefix:	bhb_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Loans And Allowance For Loan Losses [Line Items]

+ References

No definition available.

+ Details

Name:	bhb_LoansAndAllowanceForLoanLossesLineItems
Namespace Prefix:	bhb_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

Loans Collateralized By Liens Period

+ References

No definition available.

+ Details

Name:	bhb_LoansCollateralizedByLiensPeriod
Namespace Prefix:	bhb_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

- Definition

Number Of Loans, Classified As Troubled Debt Restructurings, To Relationships

+ References

No definition available.

+ Details

Name:	bhb_NumberOfLoansClassifiedAsTroubledDebtRestructuringsToRelationships
Namespace Prefix:	bhb_
Data Type:	xbrli:positiveIntegerItemType
Balance Type:	na
Period Type:	instant

- Definition

Number Of Troubled Debt Restructurings Classified As Non Accrual

+ References

No definition available.

+ Details

Name:	bhb_NumberOfTroubledDebtRestructuringsClassifiedAsNonAccrual
Namespace Prefix:	bhb_
Data Type:	xbrli:positiveIntegerItemType
Balance Type:	na
Period Type:	instant

- Definition

Number of years for which principally collateralized loans are amortized.

+ References

No definition available.

+ Details

Name:	bhb_NumberOfYearsForWhichPrincipallyCollateralizedLoansAreAmortized
Namespace Prefix:	bhb_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

- Definition

Percentage of appraised value of residential real estate loans.

+ References

No definition available.

+ Details

Name:	bhb_PercentageOfAppraisedValueOfResidentialRealEstateLoans
Namespace Prefix:	bhb_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Percentage of commercial real estate mortgage portfolio.

+ References

No definition available.

+ Details

Name:	bhb_PercentageOfCommercialRealEstateMortgagePortfolio
Namespace Prefix:	bhb_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

Related Party Transaction, Past Due Or Non Performing Loans To Related Parties

+ References

No definition available.

+ Details

Name:	bhb_RelatedPartyTransactionPastDueOrNonPerformingLoansToRelatedParties
Namespace Prefix:	bhb_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration

- Definition

The amount of the outstanding recorded investment related to financing receivables that have been modified by troubled debt restructurings.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 40
-Section 50
-Paragraph 4
-URI http://asc.fasb.org/extlink&oid=25495931&loc=d3e18845-111554

+ Details

Name:	us-gaap_FinancingReceivableModificationsRecordedInvestment
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Number of financing receivables that have been modified by troubled debt restructurings within the previous 12 months and for which there was a payment default.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 50
-Paragraph 34
-URI http://asc.fasb.org/extlink&oid=49124121&loc=SL6953682-111524

+ Details

Name:	us-gaap_FinancingReceivableModificationsSubsequentDefaultNumberOfContracts1
Namespace Prefix:	us-gaap_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration

- Definition

Carrying amount as of the balance sheet date of loans that have been pledged as collateral for borrowings. If the secured party has the right by contract or custom to sell or re-pledge the collateral, then the debtor reclassifies that asset and report that asset in its statement of financial position separately from other assets not so encumbered.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 860
-SubTopic 30
-Section 45
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=6467456&loc=d3e113888-111728

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 50
-Paragraph 5
-URI http://asc.fasb.org/extlink&oid=49124121&loc=d3e5086-111524

+ Details

Name:	us-gaap_LoansPledgedAsCollateral
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Recorded investment of consumer mortgage loan receivables secured by residential real estate properties for which formal foreclosure proceedings are in process.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 50
-Paragraph 35
-URI http://asc.fasb.org/extlink&oid=49124121&loc=SL49126937-111524

+ Details

Name:	us-gaap_MortgageLoansInProcessOfForeclosureAmount
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

The carrying amount of the outstanding balance due under the mortgage loan.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 205
-SubTopic 10
-Section S99
-Paragraph 6
-Subparagraph (SX 210.5-04.(c) Schedule IV)
-URI http://asc.fasb.org/extlink&oid=27047687&loc=d3e5864-122674

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 948
-SubTopic 310
-Section S99
-Paragraph 1
-Subparagraph (SX 210.12-29)
-URI http://asc.fasb.org/extlink&oid=6589523&loc=d3e617274-123014

+ Details

Name:	us-gaap_MortgageLoansOnRealEstateCarryingAmountOfMortgages
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Net amount of the investment in a contractual right to receive money on demand or on fixed or determinable dates that is recognized as an asset in the creditor's statement of financial position. Examples include, but are not limited to, credit card receivables, notes receivable and receivables relating to lessor's rights to payments from leases other than operating leases that have been recorded as assets. Excludes trade accounts receivable with contractual maturity of one year or less and arose from the sale of goods or services.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.3)
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

+ Details

Name:	us-gaap_NotesReceivableNet
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Details

Name:	us-gaap_CustomerSecuritiesForWhichEntityHasRightToSellOrRepledgeAxis=us-gaap_ResidentialMortgageMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_CollateralAxis=us-gaap_CollateralPledgedMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_FinancialInstrumentPerformanceStatusAxis=bhb_NonAccrualFinancingReceivableMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_FinancialInstrumentPerformanceStatusAxis=bhb_ThirtyDaysOrMoreAndStillAccruingMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_RangeAxis=us-gaap_MinimumMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_RangeAxis=us-gaap_MaximumMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_FinancialInstrumentAxis=us-gaap_HomeEquityMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis=us-gaap_CommercialRealEstatePortfolioSegmentMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis=bhb_RealEstateSecuredLoansMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis=us-gaap_CommercialPortfolioSegmentMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis=bhb_CommercialConstructionAndLandDevelopmentMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis=bhb_AgriculturalLoanMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis=bhb_OtherConsumerLoansMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_MortgageLoansOnRealEstateDescriptionTypeOfPropertyAxis=us-gaap_HotelMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

Loans And Allowance For Loan Losses (Narrative) (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2016 USD ($) loan contract item	Dec. 31, 2015 USD ($) loan contract item	Dec. 31, 2014 contract
Loans And Allowance For Loan Losses [Line Items]
Number of loans, classified as TDRs, to relationships \| item	27	17
Number of defaulted loans that had been modified as TDRs \| contract	0	0	0
Loans	$ 553,683	$ 506,842
Loans to relationships classified as TDRs, Total	$ 4,236	$ 3,162
Loans past due or non-performing to related parties \| loan	0	0
Real estate loans under foreclosure	$ 2,394	$ 4,757
Residential Real Estate Mortgages [Member]
Loans And Allowance For Loan Losses [Line Items]
Purchased loans, consisting of residential real estate mortgages	230,995	$ 137,907
Collateral Pledged [Member]
Loans And Allowance For Loan Losses [Line Items]
Total pledged loans	$ 95,852
Non-Accrual [Member]
Loans And Allowance For Loan Losses [Line Items]
Number of TDRs classified as non-accrual \| contract	17	6
Total amount of loans classified as non-accrual	$ 1,523	$ 826
Past Due 30 Days Or More And Still Accruing [Member]
Loans And Allowance For Loan Losses [Line Items]
Accruing loans contractually past due 30 days or more, total amount	$ 0	$ 0
Minimum [Member] \| Residential Real Estate Mortgages [Member]
Loans And Allowance For Loan Losses [Line Items]
Number of years for which principally collateralized loans are amortized	10 years
Maximum [Member] \| Residential Real Estate Mortgages [Member]
Loans And Allowance For Loan Losses [Line Items]
Number of years for which principally collateralized loans are amortized	30 years
Percentage of appraised value of residential real estate loans	80.00%
Home Equity Loans [Member] \| Maximum [Member]
Loans And Allowance For Loan Losses [Line Items]
Combined loan-to-value ratio	85.00%
Commercial Real Estate [Member]
Loans And Allowance For Loan Losses [Line Items]
Number of loans, classified as TDRs, to relationships \| contract	12	7
Commercial Real Estate [Member] \| Minimum [Member]
Loans And Allowance For Loan Losses [Line Items]
Number of years for which principally collateralized loans are amortized	15 years
Commercial Real Estate [Member] \| Maximum [Member]
Loans And Allowance For Loan Losses [Line Items]
Number of years for which principally collateralized loans are amortized	20 years
Real Estate Secured [Member]
Loans And Allowance For Loan Losses [Line Items]
Number of loans, classified as TDRs, to relationships \| contract	8	8
Commercial And Industrial [Member]
Loans And Allowance For Loan Losses [Line Items]
Number of loans, classified as TDRs, to relationships \| contract	5	4
Loans	$ 103,586	$ 79,911
Commercial And Industrial [Member] \| Maximum [Member]
Loans And Allowance For Loan Losses [Line Items]
Number of years for which principally collateralized loans are amortized	10 years
Commercial Construction And Land Development [Member]
Loans And Allowance For Loan Losses [Line Items]
Loans	$ 14,695	$ 24,926
Commercial Construction And Land Development [Member] \| Minimum [Member]
Loans And Allowance For Loan Losses [Line Items]
Number of months for which principally collateralized loans are amortized	6 months
Commercial Construction And Land Development [Member] \| Maximum [Member]
Loans And Allowance For Loan Losses [Line Items]
Number of months for which principally collateralized loans are amortized	24 months
Agricultural [Member]
Loans And Allowance For Loan Losses [Line Items]
Number of loans, classified as TDRs, to relationships \| contract	4	2
Other Consumer [Member]
Loans And Allowance For Loan Losses [Line Items]
Number of loans, classified as TDRs, to relationships \| contract	3	1
Lodging And Hospitality Industry [Member]
Loans And Allowance For Loan Losses [Line Items]
Loans	$ 128,680	$ 98,231
Lodging And Hospitality Industry [Member] \| Commercial Real Estate [Member]
Loans And Allowance For Loan Losses [Line Items]
Percentage of commercial real estate mortgage portfolio	31.60%