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

X

- Definition

Capital conservation buffer percentage.

+ References

No definition available.

+ Details

Name:	hbnc_CapitalConservationBufferPercentage
Namespace Prefix:	hbnc_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

X

- 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