XML 56 R46.htm IDEA: XBRL DOCUMENT
v3.21.2

Securities - Additional Information (Details) - USD ($) | Sep. 30, 2021 | Dec. 31, 2020
--- | --- | ---
Investments, Debt and Equity Securities [Abstract] |  |
Allowance for credit losses for available for sale debt securities | $ 0 | $ 0
Accrued interest receivable on available for sale debt securities | $ 13,100,000 | $ 8,100,000

X
- Definition Debt Securities, Available-for-Sale, Accrued Interest + References No definition available. + Details
Name: | hbnc_DebtSecuritiesAvailableForSaleAccruedInterest
Namespace Prefix: | hbnc_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Amount excluding accrued interest, of allowance for credit loss on investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale). + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 326 -SubTopic 30 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=124258926&loc=SL82898722-210454 + Details
Name: | us-gaap_DebtSecuritiesAvailableForSaleAmortizedCostAllowanceForCreditLossExcludingAccruedInterest
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

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