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Goodwill And Other Intangible Assets (Narrative) (Details) (USD $) In Thousands, unless otherwise specified | Dec. 31, 2014 | Dec. 31, 2013 | Aug. 10, 2012
--- | --- | --- | ---
Business Acquisition [Line Items] |  |  |
Goodwill | $ 4,935 us-gaap_Goodwill | $ 4,935 us-gaap_Goodwill |
Balance of core deposit intangibles | 562 us-gaap_FiniteLivedIntangibleAssetsNet | 655 us-gaap_FiniteLivedIntangibleAssetsNet |
Finite-Lived Intangible Assets, Amortization Expense, Next Twelve Months | 92 us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseNextTwelveMonths |  |
Finite-Lived Intangible Assets, Amortization Expense, Year Two | 92 us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearTwo |  |
Finite-Lived Intangible Assets, Amortization Expense, Year Three | 92 us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearThree |  |
Finite-Lived Intangible Assets, Amortization Expense, Year Four | 92 us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearFour |  |
Finite-Lived Intangible Assets, Amortization Expense, Year Five | 92 us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearFive |  |
Finite-Lived Intangible Assets, Amortization Expense, Year Six | 92 bhb_FiniteLivedIntangibleAssetsAmortizationExpenseYearSix |  |
Finite-Lived Intangible Assets, Amortization Expense, Year Seven | 11 bhb_FiniteLivedIntangibleAssetsAmortizationExpenseYearSeven |  |
Border Trust Company [Member] |  |  |
Business Acquisition [Line Items] |  |  |
Goodwill |  |  | $ 1,777 us-gaap_Goodwill / us-gaap_BusinessAcquisitionAxis = bhb_BorderTrustCompanyMember

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- Definition Amount of amortization expense expected to be recognized during the next fiscal year following the latest fiscal year for assets, excluding financial assets and goodwill, lacking physical substance with a finite life. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 2 -Subparagraph (a)(3) -URI http://asc.fasb.org/extlink&oid=26713463&loc=d3e16323-109275 + Details
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- Definition Amount of amortization expense expected to be recognized during the fifth fiscal year following the latest fiscal year for assets, excluding financial assets and goodwill, lacking physical substance with a finite life. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 2 -Subparagraph (a)(3) -URI http://asc.fasb.org/extlink&oid=26713463&loc=d3e16323-109275 + Details
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- Definition Amount of amortization expense expected to be recognized during the second fiscal year following the latest fiscal year for assets, excluding financial assets and goodwill, lacking physical substance with a finite life. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 2 -Subparagraph (a)(3) -URI http://asc.fasb.org/extlink&oid=26713463&loc=d3e16323-109275 + Details
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- Definition Amount after amortization of assets, excluding financial assets and goodwill, lacking physical substance with a finite life. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 2 -Subparagraph (a)(1) -URI http://asc.fasb.org/extlink&oid=26713463&loc=d3e16323-109275 + Details
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- Definition Amount after accumulated impairment loss of an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=14024403&loc=d3e13816-109267 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6388280&loc=d3e13770-109266 + Details
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