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Disclosures About Fair Value of Assets and Liabilities (Details 4) (Fair Value, Measurements, Nonrecurring [Member], USD $) In Thousands, unless otherwise specified | Sep. 30, 2012 | Dec. 31, 2011
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Other assets are measured at fair value on a nonrecurring basis |  |
Impaired loans | $ 10,462 | $ 5,822
Mortgage servicing rights | 4,602 | 4,193
Quoted Prices in Active Markets for Identical Assets (Level 1) [Member] |  |
Other assets are measured at fair value on a nonrecurring basis |  |
Impaired loans |  |
Mortgage servicing rights |  |
Significant Other Observable Inputs (Level 2) [Member] |  |
Other assets are measured at fair value on a nonrecurring basis |  |
Impaired loans |  |
Mortgage servicing rights |  |
Significant Unobservable Inputs (Level 3) [Member] |  |
Other assets are measured at fair value on a nonrecurring basis |  |
Impaired loans | 10,462 | 5,822
Mortgage servicing rights | $ 4,602 | $ 4,193

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- Definition Impaired loans. + References No definition available. + Details
Name: | hbnc_ImpairedLoans
Namespace Prefix: | hbnc_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

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- Definition Mortgage servicing rights. + References No definition available. + Details
Name: | hbnc_MortgageServicingRights
Namespace Prefix: | hbnc_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

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- Details
Name: | us-gaap_AssetsFairValueDisclosureAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration