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Allowance for Loan Losses - Additional Information (Detail) | 9 Months Ended
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Sep. 30, 2014
Scenario, Actual [Member] |
Financing Receivable, Recorded Investment, Past Due [Line Items] |
Actual loss history experienced by the Company | 5 years
Minimum [Member] |
Financing Receivable, Recorded Investment, Past Due [Line Items] |
Actual loss history experienced by the Company | 1 year
Maximum [Member] |
Financing Receivable, Recorded Investment, Past Due [Line Items] |
Actual loss history experienced by the Company | 5 years
Allowance for loan losses charge down family first and junior lien mortgages past due period | 180 days
Allowance for loan losses charge down unsecured open end loans past due period | 90 days
Allowance for loan losses charge down other secured loans past due period | 90 days

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- Definition Allowance for loan losses charge down family first and junior lien mortgages past due period. + References No definition available. + Details
Name: | hbnc_AllowanceForLoanLossesChargeDownFamilyFirstAndJuniorLienMortgagesPastDuePeriod
Namespace Prefix: | hbnc_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

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- Definition Allowance for loan losses charge down other secured loans past due period. + References No definition available. + Details
Name: | hbnc_AllowanceForLoanLossesChargeDownOtherSecuredLoansPastDuePeriod
Namespace Prefix: | hbnc_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- Definition Allowance for loan losses charge down unsecured open end loans past due period. + References No definition available. + Details
Name: | hbnc_AllowanceForLoanLossesChargeDownUnsecuredOpenEndLoansPastDuePeriod
Namespace Prefix: | hbnc_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- Definition Allowance for loan losses historical experience loss period. + References No definition available. + Details
Name: | hbnc_AllowanceForLoanLossesHistoricalExperienceLossPeriod
Namespace Prefix: | hbnc_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

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- Details
Name: | us-gaap_FinancingReceivableRecordedInvestmentPastDueLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration