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Repurchase Agreements - Additional Information (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021
Disclosure of Repurchase Agreements [Abstract]
Maximum amount of outstanding agreements	$ 148.7	$ 145.2
Daily average amount of outstanding agreements	$ 141.0	$ 123.7

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- Definition

Securities sold under agreements to repurchase daily average outstanding.

+ References

No definition available.

+ Details

Name:	hbnc_SecuritiesSoldUnderAgreementsToRepurchaseDailyAverageOutstanding
Namespace Prefix:	hbnc_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

X

- Definition

Securities sold under agreements to repurchase monthly average outstanding amount.

+ References

No definition available.

+ Details

Name:	hbnc_SecuritiesSoldUnderAgreementsToRepurchaseMonthlyAverageOutstandingAmount
Namespace Prefix:	hbnc_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

X

- References

No definition available.

+ Details

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