Loans And Allowance For Loan Losses (Narrative) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended
Mar. 31, 2014 loan item	Dec. 31, 2013 item loan
Loans And Allowance For Loan Losses [Line Items]
Loan returned to accrual status, performance required, months	6 months
Number of TDRs past due and classified as non-performing	7	7
Number of relationships to loans classified as troubled debt restructurings	8	8
Loans	$ 448,315	$ 455,572
Commercial Real Estate Mortgages [Member]
Loans And Allowance For Loan Losses [Line Items]
Period of fixed rate interest before transition to variable rate	5 years
Maximum [Member]
Loans And Allowance For Loan Losses [Line Items]
Percentage of appraised value of residential real estate loans	80.00%
Maximum [Member] \| Commercial Real Estate Mortgages [Member]
Loans And Allowance For Loan Losses [Line Items]
Number of years for which principally collateralized loans are amortized	20 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
Minimum [Member] \| Commercial Real Estate Mortgages [Member]
Loans And Allowance For Loan Losses [Line Items]
Number of years for which principally collateralized loans are amortized	15 years
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
Real Estate Secured Loans [Member]
Loans And Allowance For Loan Losses [Line Items]
Number of loans, classified as TDRs, to relationships	6	6
Loans to relationships classified as TDRs, Total	1,435	1,454
TDRs past due and classified as non-performing, total amount	405	416
Commercial And Industrial [Member]
Loans And Allowance For Loan Losses [Line Items]
Number of loans, classified as TDRs, to relationships	6	6
Consumer Loans [Member]
Loans And Allowance For Loan Losses [Line Items]
Number of loans, classified as TDRs, to relationships	1	1
Lodging Industry [Member]
Loans And Allowance For Loan Losses [Line Items]
Percentage of commercial real estate mortgage portfolio	33.80%
Loans	$ 115,723	$ 114,982

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

Minimum Timely Payments Required Before Reversion To Accruing Status, period

+ References

No definition available.

+ Details

Name:	bhb_MinimumTimelyPaymentsRequiredBeforeReversionToAccruingStatusPeriod
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 Relationships To Loans Classified As Troubled Debt Restructurings

+ References

No definition available.

+ Details

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

- Definition

Number of Troubled Debt Restructurings Past Due And Classified As Non-Performing

+ References

No definition available.

+ Details

Name:	bhb_NumberOfTroubledDebtRestructuringsPastDueAndClassifiedAsNonPerforming
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

Period Of Fixed Rate Interest Before Transition To Variable Rate

+ References

No definition available.

+ Details

Name:	bhb_PeriodOfFixedRateInterestBeforeTransitionToVariableRate
Namespace Prefix:	bhb_
Data Type:	xbrli:durationItemType
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=6951948&loc=d3e18845-111554

+ Details

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

- Definition

Amount of investment related to financing receivables modified by troubled debt restructurings within the previous 12 months, 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=7512638&loc=SL6953682-111524

+ Details

Name:	us-gaap_FinancingReceivableModificationsSubsequentDefaultRecordedInvestment
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

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 02

-Paragraph 3

-Article 5

+ Details

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