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Long-Term Debt (Narrative) (Details) (USD $) In Thousands, unless otherwise specified | 12 Months Ended |
--- | --- | ---
Dec. 31, 2014 | Dec. 31, 2008 | Dec. 31, 2013
Long-Term Debt [Abstract] |  |  |
Callable Long Term Debt | $ 17,000 bhb_CallableLongTermDebt |  | $ 19,000 bhb_CallableLongTermDebt
Subordinated Debt | 5,000 us-gaap_SubordinatedDebt |  |
Subordinated debt securities, years before callable option without penalty | 5 years |  |
Subordinated debt securities, basis spread on variable rate | 3.45%us-gaap_DebtInstrumentBasisSpreadOnVariableRate1 |  |
Incurred costs to issue subordinated debt securities |  | $ 197 us-gaap_DebtIssuanceCosts |
Amortization of costs incurred, number of years used, interest method | 15 years |  |

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- Definition Amortization Of Costs Incurred, Number Of Years Used, Interest method + References No definition available. + Details
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- Definition Callable Long Term Debt + References No definition available. + Details
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- Definition Subordinated Debt Securities, Years Before Callable Option Without Penalty + References No definition available. + Details
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- Definition Percentage points added to the reference rate to compute the variable rate on the debt instrument. + References No definition available. + Details
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- Definition Amount of debt issuance costs (for example, but not limited to, legal, accounting, broker, and regulatory fees). + References No definition available. + Details
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- Details
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- Definition Including the current and noncurrent portions, carrying value as of the balance sheet date of subordinated debt (with initial maturities beyond one year or beyond the operating cycle if longer). Subordinated debt places a lender in a lien position behind debt having a higher priority of repayment in liquidation of the entity's assets. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03.16) -URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 03 -Paragraph 16 -Article 9 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-03.16) -URI http://asc.fasb.org/extlink&oid=6879938&loc=d3e572229-122910 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Staff Accounting Bulletin (SAB) -Number Topic 10 -Section F Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Article 5 -Subsection 19, 20, 22 + Details
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