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Regulatory Capital - Additional Information (Detail) | Dec. 31, 2019
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Schedule Of Regulatory Assets And Liabilities [Line Items] |
Capital conservation buffer | 2.50%

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- Definition Capital conservation buffer percentage. + References No definition available. + Details
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Namespace Prefix: | hbnc_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | instant

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- Definition Schedule Of Regulatory Assets And Liabilities [Line Items] + References No definition available. + Details
Name: | hbnc_ScheduleOfRegulatoryAssetsAndLiabilitiesLineItems
Namespace Prefix: | hbnc_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration