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Commitments, Off-Balance Sheet Risk and Contingencies (Details) (USD $) In Millions, unless otherwise specified | 12 Months Ended |
--- | --- | ---
Dec. 31, 2012 | Dec. 31, 2011
Commitments, Off-Balance Sheet Risk and Contingencies (Textual) [Abstract] |  |
Cash on hand or deposit with Federal Reserve Bank | $ 5.9 |
Commitments to make loans | 328.9 | 299.0
Commitments under outstanding standby letter of credit | 1.6 | 1.1
Anticipated losses from unused commitments | $ 0 |

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- Definition Anticipated losses from unused commitments. + References No definition available. + Details
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Namespace Prefix: | hbnc_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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- Details
Name: | hbnc_CommitmentsOffBalanceSheetRiskAndContingenciesTextualAbstract
Namespace Prefix: | hbnc_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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- 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

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- 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

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- 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 AICPA -Name Audit and Accounting Guide (AAG) -Number AAG-BRD -Paragraph 80 -Subparagraph Exhibit 4-8, 3 -IssueDate 2006-05-01 -Chapter 4 -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. + Details
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Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant