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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 | Mar. 31, 2013 | Dec. 31, 2012
--- | --- | ---
Other assets measured at fair value on a nonrecurring basis |  |
Impaired loans | $ 8,109 | $ 8,652
Mortgage servicing rights | 5,461 | 5,145
Quoted Prices in Active Markets for Identical Assets (Level 1) [Member] |  |
Other assets measured at fair value on a nonrecurring basis |  |
Impaired loans |  |
Mortgage servicing rights |  |
Significant Other Observable Inputs (Level 2) [Member] |  |
Other assets measured at fair value on a nonrecurring basis |  |
Impaired loans |  |
Mortgage servicing rights |  |
Significant Unobservable Inputs (Level 3) [Member] |  |
Other assets measured at fair value on a nonrecurring basis |  |
Impaired loans | 8,109 | 8,652
Mortgage servicing rights | $ 5,461 | $ 5,145

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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