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Commitments, Off Balance Sheets Risk and Contingencies - Additional Information (Detail) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012
Commitments And Contingencies Disclosure [Abstract]
Cash on hand or deposit with Federal Reserve Bank	$ 2.8
Commitments to make loans	519.7	328.9
Commitments under outstanding standby letters of credit	1.3	1.6
Anticipated losses from unused commitments	$ 0

X

- Definition

Anticipated losses from unused commitments.

+ References

No definition available.

+ Details

Name:	hbnc_AnticipatedLossesFromUnusedCommitments
Namespace Prefix:	hbnc_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

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

- 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

Cash deposited in a special reserve account for the exclusive benefit of customers pursuant to SEC Regulations.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 942

-SubTopic 305

-Section 50

-Paragraph 1

-URI http://asc.fasb.org/extlink&oid=6478312&loc=d3e61473-112792

+ Details

Name:	us-gaap_CashReserveDepositRequiredAndMade
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

X

- Details

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