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Commitments, Off-Balance Sheet Risk and Contingencies (Details) - USD ($) $ in Millions	Dec. 31, 2023	Dec. 31, 2022
Commitments and Contingencies Disclosure [Abstract]
Commitments to make loans	$ 1,600.0	$ 1,500.0
Commitments under outstanding standby letters of credit	$ 16.5	$ 17.8

X

- Definition

Commitment to make loan by company.

+ References

No definition available.

+ Details

Name:	hbnc_CommitmentToMakeLoanByCompany
Namespace Prefix:	hbnc_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

X

- Definition

Commitments under outstanding standby letters of credit.

+ References

No definition available.

+ Details

Name:	hbnc_CommitmentsUnderOutstandingStandbyLettersOfCredit
Namespace Prefix:	hbnc_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

X

- References

No definition available.

+ Details

Name:	us-gaap_CommitmentsAndContingenciesDisclosureAbstract
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration