Securities - Fair Value and Amortized Cost of Securities (Details) - USD ($) $ in Thousands	Mar. 31, 2026	Dec. 31, 2025
Fair Value
Pledged securities for borrowing availability at the Federal Reserve	$ 111,346	$ 114,727
Amortized Cost
Pledged securities for borrowing availability at the Federal Reserve	$ 140,363	$ 140,512

Pledged Assets Separately Reported, Securities Pledged for Federal Reserve, at Fair Value

No definition available.

Name:	hbnc_PledgedAssetsSeparatelyReportedSecuritiesPledgedForFederalReserveAtFairValue
Namespace Prefix:	hbnc_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant