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v3.20.2

Loans - Additional Information (Details) $ in Millions | Sep. 30, 2020 USD ($)
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Receivables [Abstract] |
Paycheck protection program | $ 310.8
Deferred loan costs | $ (5.7)

X
- Definition Deferred fees costs loans and leases + References No definition available. + Details
Name: | hbnc_DeferredFeesCostsLoansAndLeases
Namespace Prefix: | hbnc_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

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- Definition Financing Receivable, Paycheck Protection Program + References No definition available. + Details
Name: | hbnc_FinancingReceivablePaycheckProtectionProgram
Namespace Prefix: | hbnc_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

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- References No definition available. + Details
Name: | us-gaap_ReceivablesAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration