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Long-Term Debt (Summary Of Long-Term Debt By Contractual Maturity) (Details) (USD $) In Thousands, unless otherwise specified | Dec. 31, 2014 | Dec. 31, 2013
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Total Principal |  |
Total Principal due in two fiscal years | $ 11,000 us-gaap_FederalHomeLoanBankAdvancesMaturitiesSummaryDueFromOneToTwoYearsOfBalanceSheetDate | $ 21,000 us-gaap_FederalHomeLoanBankAdvancesMaturitiesSummaryDueFromOneToTwoYearsOfBalanceSheetDate
Total Principal due in three fiscal years | 52,500 us-gaap_FederalHomeLoanBankAdvancesMaturitiesSummaryDueFromTwoToThreeYearsOfBalanceSheetDate | 11,000 us-gaap_FederalHomeLoanBankAdvancesMaturitiesSummaryDueFromTwoToThreeYearsOfBalanceSheetDate
Total Principal due in four fiscal years | 12,000 us-gaap_FederalHomeLoanBankAdvancesMaturitiesSummaryDueFromThreeToFourYearsOfBalanceSheetDate | 52,500 us-gaap_FederalHomeLoanBankAdvancesMaturitiesSummaryDueFromThreeToFourYearsOfBalanceSheetDate
Total Principal due in five fiscal years | 50,000 us-gaap_FederalHomeLoanBankAdvancesMaturitiesSummaryDueFromFourToFiveYearsOfBalanceSheetDate | 7,000 us-gaap_FederalHomeLoanBankAdvancesMaturitiesSummaryDueFromFourToFiveYearsOfBalanceSheetDate
Total Principal due after five fiscal years | 3,000 us-gaap_FederalHomeLoanBankAdvancesMaturitiesSummaryDueAfterFiveYearsOfBalanceSheetDate |
Total long-term debt | 128,500 us-gaap_AdvancesFromFederalHomeLoanBanks | 91,500 us-gaap_AdvancesFromFederalHomeLoanBanks
Rate |  |
Interest rate of principal due in two fiscal years | 1.60%us-gaap_FederalHomeLoanBankAdvancesMaturitiesSummaryAverageInterestRateOneToTwoYearsFromBalanceSheetDate | 2.44%us-gaap_FederalHomeLoanBankAdvancesMaturitiesSummaryAverageInterestRateOneToTwoYearsFromBalanceSheetDate
Interest rate of principal due in three fiscal years | 2.21%us-gaap_FederalHomeLoanBankAdvancesMaturitiesSummaryAverageInterestRateTwoToThreeYearsFromBalanceSheetDate | 1.60%us-gaap_FederalHomeLoanBankAdvancesMaturitiesSummaryAverageInterestRateTwoToThreeYearsFromBalanceSheetDate
Interest rate of principal due in four fiscal years | 1.65%us-gaap_FederalHomeLoanBankAdvancesMaturitiesSummaryAverageInterestRateThreeToFourYearsFromBalanceSheetDate | 1.74%us-gaap_FederalHomeLoanBankAdvancesMaturitiesSummaryAverageInterestRateThreeToFourYearsFromBalanceSheetDate
Interest rate of principal due in five fiscal years | 1.94%us-gaap_FederalHomeLoanBankAdvancesMaturitiesSummaryAverageInterestRateFourToFiveYearsFromBalanceSheetDate | 1.50%us-gaap_FederalHomeLoanBankAdvancesMaturitiesSummaryAverageInterestRateFourToFiveYearsFromBalanceSheetDate
Interest rate of principal due after five fiscal years | 2.44%us-gaap_FederalHomeLoanBankAdvancesMaturitiesSummaryAverageInterestRateAfterFiveYearsFromBalanceSheetDate |
Interest rate of principal | 2.01%us-gaap_FederalHomeLoanBankAdvancesGeneralDebtObligationsDisclosuresWeightedAverageInterestRate | 1.86%us-gaap_FederalHomeLoanBankAdvancesGeneralDebtObligationsDisclosuresWeightedAverageInterestRate
Callable Federal Home Loan Bank Advances [Member] |  |
Total Principal |  |
Total Principal due in two fiscal years |  | 2,000 us-gaap_FederalHomeLoanBankAdvancesMaturitiesSummaryDueFromOneToTwoYearsOfBalanceSheetDate / us-gaap_LongtermDebtTypeAxis = bhb_CallableFederalHomeLoanBankAdvancesMember
Total Principal due in three fiscal years | 15,000 us-gaap_FederalHomeLoanBankAdvancesMaturitiesSummaryDueFromTwoToThreeYearsOfBalanceSheetDate / us-gaap_LongtermDebtTypeAxis = bhb_CallableFederalHomeLoanBankAdvancesMember |
Total Principal due in four fiscal years | 2,000 us-gaap_FederalHomeLoanBankAdvancesMaturitiesSummaryDueFromThreeToFourYearsOfBalanceSheetDate / us-gaap_LongtermDebtTypeAxis = bhb_CallableFederalHomeLoanBankAdvancesMember | 28,000 us-gaap_FederalHomeLoanBankAdvancesMaturitiesSummaryDueFromThreeToFourYearsOfBalanceSheetDate / us-gaap_LongtermDebtTypeAxis = bhb_CallableFederalHomeLoanBankAdvancesMember
Total Principal due in five fiscal years |  | 2,000 us-gaap_FederalHomeLoanBankAdvancesMaturitiesSummaryDueFromFourToFiveYearsOfBalanceSheetDate / us-gaap_LongtermDebtTypeAxis = bhb_CallableFederalHomeLoanBankAdvancesMember
Total long-term debt | $ 17,000 us-gaap_AdvancesFromFederalHomeLoanBanks / us-gaap_LongtermDebtTypeAxis = bhb_CallableFederalHomeLoanBankAdvancesMember | $ 32,000 us-gaap_AdvancesFromFederalHomeLoanBanks / us-gaap_LongtermDebtTypeAxis = bhb_CallableFederalHomeLoanBankAdvancesMember
Rate |  |
Interest rate of principal due in two fiscal years |  | 4.35%us-gaap_FederalHomeLoanBankAdvancesMaturitiesSummaryAverageInterestRateOneToTwoYearsFromBalanceSheetDate / us-gaap_LongtermDebtTypeAxis = bhb_CallableFederalHomeLoanBankAdvancesMember
Interest rate of principal due in three fiscal years | 4.20%us-gaap_FederalHomeLoanBankAdvancesMaturitiesSummaryAverageInterestRateTwoToThreeYearsFromBalanceSheetDate / us-gaap_LongtermDebtTypeAxis = bhb_CallableFederalHomeLoanBankAdvancesMember |
Interest rate of principal due in four fiscal years | 2.25%us-gaap_FederalHomeLoanBankAdvancesMaturitiesSummaryAverageInterestRateThreeToFourYearsFromBalanceSheetDate / us-gaap_LongtermDebtTypeAxis = bhb_CallableFederalHomeLoanBankAdvancesMember | 2.17%us-gaap_FederalHomeLoanBankAdvancesMaturitiesSummaryAverageInterestRateThreeToFourYearsFromBalanceSheetDate / us-gaap_LongtermDebtTypeAxis = bhb_CallableFederalHomeLoanBankAdvancesMember
Interest rate of principal due in five fiscal years |  | 2.25%us-gaap_FederalHomeLoanBankAdvancesMaturitiesSummaryAverageInterestRateFourToFiveYearsFromBalanceSheetDate / us-gaap_LongtermDebtTypeAxis = bhb_CallableFederalHomeLoanBankAdvancesMember
Interest rate of principal | 3.96%us-gaap_FederalHomeLoanBankAdvancesGeneralDebtObligationsDisclosuresWeightedAverageInterestRate / us-gaap_LongtermDebtTypeAxis = bhb_CallableFederalHomeLoanBankAdvancesMember | 2.31%us-gaap_FederalHomeLoanBankAdvancesGeneralDebtObligationsDisclosuresWeightedAverageInterestRate / us-gaap_LongtermDebtTypeAxis = bhb_CallableFederalHomeLoanBankAdvancesMember
Minimum [Member] |  |
Rate |  |
Interest rate of principal due in two fiscal years | 1.17%us-gaap_FederalHomeLoanBankAdvancesMaturitiesSummaryAverageInterestRateOneToTwoYearsFromBalanceSheetDate / us-gaap_RangeAxis = us-gaap_MinimumMember | 1.68%us-gaap_FederalHomeLoanBankAdvancesMaturitiesSummaryAverageInterestRateOneToTwoYearsFromBalanceSheetDate / us-gaap_RangeAxis = us-gaap_MinimumMember
Interest rate of principal due in three fiscal years | 0.99%us-gaap_FederalHomeLoanBankAdvancesMaturitiesSummaryAverageInterestRateTwoToThreeYearsFromBalanceSheetDate / us-gaap_RangeAxis = us-gaap_MinimumMember | 1.17%us-gaap_FederalHomeLoanBankAdvancesMaturitiesSummaryAverageInterestRateTwoToThreeYearsFromBalanceSheetDate / us-gaap_RangeAxis = us-gaap_MinimumMember
Interest rate of principal due in four fiscal years | 1.15%us-gaap_FederalHomeLoanBankAdvancesMaturitiesSummaryAverageInterestRateThreeToFourYearsFromBalanceSheetDate / us-gaap_RangeAxis = us-gaap_MinimumMember | (0.22%)us-gaap_FederalHomeLoanBankAdvancesMaturitiesSummaryAverageInterestRateThreeToFourYearsFromBalanceSheetDate / us-gaap_RangeAxis = us-gaap_MinimumMember
Interest rate of principal due in five fiscal years | 1.66%us-gaap_FederalHomeLoanBankAdvancesMaturitiesSummaryAverageInterestRateFourToFiveYearsFromBalanceSheetDate / us-gaap_RangeAxis = us-gaap_MinimumMember | 1.15%us-gaap_FederalHomeLoanBankAdvancesMaturitiesSummaryAverageInterestRateFourToFiveYearsFromBalanceSheetDate / us-gaap_RangeAxis = us-gaap_MinimumMember
Interest rate of principal due after five fiscal years | 2.43%us-gaap_FederalHomeLoanBankAdvancesMaturitiesSummaryAverageInterestRateAfterFiveYearsFromBalanceSheetDate / us-gaap_RangeAxis = us-gaap_MinimumMember |
Minimum [Member] | Callable Federal Home Loan Bank Advances [Member] |  |
Rate |  |
Interest rate of principal due in two fiscal years |  | 3.99%us-gaap_FederalHomeLoanBankAdvancesMaturitiesSummaryAverageInterestRateOneToTwoYearsFromBalanceSheetDate / us-gaap_LongtermDebtTypeAxis = bhb_CallableFederalHomeLoanBankAdvancesMember / us-gaap_RangeAxis = us-gaap_MinimumMember
Interest rate of principal due in three fiscal years | 3.69%us-gaap_FederalHomeLoanBankAdvancesMaturitiesSummaryAverageInterestRateTwoToThreeYearsFromBalanceSheetDate / us-gaap_LongtermDebtTypeAxis = bhb_CallableFederalHomeLoanBankAdvancesMember / us-gaap_RangeAxis = us-gaap_MinimumMember |
Interest rate of principal due in four fiscal years | 2.25%us-gaap_FederalHomeLoanBankAdvancesMaturitiesSummaryAverageInterestRateThreeToFourYearsFromBalanceSheetDate / us-gaap_LongtermDebtTypeAxis = bhb_CallableFederalHomeLoanBankAdvancesMember / us-gaap_RangeAxis = us-gaap_MinimumMember | (0.22%)us-gaap_FederalHomeLoanBankAdvancesMaturitiesSummaryAverageInterestRateThreeToFourYearsFromBalanceSheetDate / us-gaap_LongtermDebtTypeAxis = bhb_CallableFederalHomeLoanBankAdvancesMember / us-gaap_RangeAxis = us-gaap_MinimumMember
Interest rate of principal due in five fiscal years |  | 2.25%us-gaap_FederalHomeLoanBankAdvancesMaturitiesSummaryAverageInterestRateFourToFiveYearsFromBalanceSheetDate / us-gaap_LongtermDebtTypeAxis = bhb_CallableFederalHomeLoanBankAdvancesMember / us-gaap_RangeAxis = us-gaap_MinimumMember
Maximum [Member] |  |
Rate |  |
Interest rate of principal due in two fiscal years | 2.29%us-gaap_FederalHomeLoanBankAdvancesMaturitiesSummaryAverageInterestRateOneToTwoYearsFromBalanceSheetDate / us-gaap_RangeAxis = us-gaap_MaximumMember | 4.70%us-gaap_FederalHomeLoanBankAdvancesMaturitiesSummaryAverageInterestRateOneToTwoYearsFromBalanceSheetDate / us-gaap_RangeAxis = us-gaap_MaximumMember
Interest rate of principal due in three fiscal years | 4.50%us-gaap_FederalHomeLoanBankAdvancesMaturitiesSummaryAverageInterestRateTwoToThreeYearsFromBalanceSheetDate / us-gaap_RangeAxis = us-gaap_MaximumMember | 2.29%us-gaap_FederalHomeLoanBankAdvancesMaturitiesSummaryAverageInterestRateTwoToThreeYearsFromBalanceSheetDate / us-gaap_RangeAxis = us-gaap_MaximumMember
Interest rate of principal due in four fiscal years | 2.25%us-gaap_FederalHomeLoanBankAdvancesMaturitiesSummaryAverageInterestRateThreeToFourYearsFromBalanceSheetDate / us-gaap_RangeAxis = us-gaap_MaximumMember | 4.50%us-gaap_FederalHomeLoanBankAdvancesMaturitiesSummaryAverageInterestRateThreeToFourYearsFromBalanceSheetDate / us-gaap_RangeAxis = us-gaap_MaximumMember
Interest rate of principal due in five fiscal years | 2.15%us-gaap_FederalHomeLoanBankAdvancesMaturitiesSummaryAverageInterestRateFourToFiveYearsFromBalanceSheetDate / us-gaap_RangeAxis = us-gaap_MaximumMember | 2.25%us-gaap_FederalHomeLoanBankAdvancesMaturitiesSummaryAverageInterestRateFourToFiveYearsFromBalanceSheetDate / us-gaap_RangeAxis = us-gaap_MaximumMember
Interest rate of principal due after five fiscal years | 2.45%us-gaap_FederalHomeLoanBankAdvancesMaturitiesSummaryAverageInterestRateAfterFiveYearsFromBalanceSheetDate / us-gaap_RangeAxis = us-gaap_MaximumMember |
Maximum [Member] | Callable Federal Home Loan Bank Advances [Member] |  |
Rate |  |
Interest rate of principal due in two fiscal years | 4.50%us-gaap_FederalHomeLoanBankAdvancesMaturitiesSummaryAverageInterestRateOneToTwoYearsFromBalanceSheetDate / us-gaap_LongtermDebtTypeAxis = bhb_CallableFederalHomeLoanBankAdvancesMember / us-gaap_RangeAxis = us-gaap_MaximumMember | 4.70%us-gaap_FederalHomeLoanBankAdvancesMaturitiesSummaryAverageInterestRateOneToTwoYearsFromBalanceSheetDate / us-gaap_LongtermDebtTypeAxis = bhb_CallableFederalHomeLoanBankAdvancesMember / us-gaap_RangeAxis = us-gaap_MaximumMember
Interest rate of principal due in four fiscal years | 2.25%us-gaap_FederalHomeLoanBankAdvancesMaturitiesSummaryAverageInterestRateThreeToFourYearsFromBalanceSheetDate / us-gaap_LongtermDebtTypeAxis = bhb_CallableFederalHomeLoanBankAdvancesMember / us-gaap_RangeAxis = us-gaap_MaximumMember | 4.50%us-gaap_FederalHomeLoanBankAdvancesMaturitiesSummaryAverageInterestRateThreeToFourYearsFromBalanceSheetDate / us-gaap_LongtermDebtTypeAxis = bhb_CallableFederalHomeLoanBankAdvancesMember / us-gaap_RangeAxis = us-gaap_MaximumMember
Interest rate of principal due in five fiscal years |  | 2.25%us-gaap_FederalHomeLoanBankAdvancesMaturitiesSummaryAverageInterestRateFourToFiveYearsFromBalanceSheetDate / us-gaap_LongtermDebtTypeAxis = bhb_CallableFederalHomeLoanBankAdvancesMember / us-gaap_RangeAxis = us-gaap_MaximumMember

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- Definition Amount of borrowings as of the balance sheet date from the Federal Home Loan Bank, which are primarily used to cover shortages in the required reserve balance and liquidity shortages. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 470 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6479118&loc=d3e64650-112822 + Details
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- Definition States the weighted average interest rate applicable to the advances from the Federal Home Loan Bank outstanding as of the Balance Sheet date. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Industry Guide -Number 3 -Section VII -Subsection 1 + Details
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- Definition The weighted average interest rate applicable to the Federal Home Loan Bank advances which are due after five years of the Balance Sheet date. + 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 210.9-03.13(3)(a)) -URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878 + Details
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- Definition The weighted average interest rate applicable to the Federal Home Loan Bank advances which are due from four to five years of the Balance Sheet date. + 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 210.9-03.13(3)(a)) -URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878 + Details
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- Definition The weighted average interest rate applicable to the Federal Home Loan Bank advances which are due from one to two years of the Balance Sheet date. + 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 210.9-03.13(3)(a)) -URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878 + Details
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- Definition The weighted average interest rate applicable to the Federal Home Loan Bank advances which are due from three to four years of the Balance Sheet date. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Industry Guide -Number 3 -Section VII -Paragraph 3 + Details
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- Definition The weighted average interest rate applicable to the Federal Home Loan Bank advances which are due from two to three years of the Balance Sheet date. + 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 210.9-03.13(3)(a)) -URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878 + Details
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- Definition Amount of federal home loan bank advances maturing after the fifth fiscal year following the latest fiscal year. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 470 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6479118&loc=d3e64650-112822 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 470 -SubTopic 10 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6802200&loc=d3e1835-112601 + Details
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- Definition Amount of federal home loan bank advances maturing in the fifth fiscal year following the latest fiscal year. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 470 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6479118&loc=d3e64650-112822 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 470 -SubTopic 10 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6802200&loc=d3e1835-112601 + Details
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- Definition Amount of federal home loan bank advances maturing in the second fiscal year following the latest fiscal year. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 470 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6479118&loc=d3e64650-112822 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 470 -SubTopic 10 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6802200&loc=d3e1835-112601 + Details
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- Definition Amount of federal home loan bank advances maturing in the fourth fiscal year following the latest fiscal year. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 470 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6479118&loc=d3e64650-112822 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 470 -SubTopic 10 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6802200&loc=d3e1835-112601 + Details
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- Definition Amount of federal home loan bank advances maturing in the third fiscal year following the latest fiscal year. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 470 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6479118&loc=d3e64650-112822 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 470 -SubTopic 10 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6802200&loc=d3e1835-112601 + Details
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