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Disclosures About Fair Value of Assets and Liabilities (Details 5) (USD $) In Thousands, unless otherwise specified | 9 Months Ended
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Sep. 30, 2012
Impaired loans [Member] |
Unobservable inputs in recurring and nonrecurring level three fair value measurements |
Unobservable Inputs | Discount to reflect current market conditions and ultimate collectability
Mortgage servicing rights [Member] |
Unobservable inputs in recurring and nonrecurring level three fair value measurements |
Unobservable Inputs | Discount to reflect current market conditions
Level 3 [Member] | Impaired loans [Member] |
Unobservable inputs in recurring and nonrecurring level three fair value measurements |
Fair Value at September 30, 2012 | 10,462
Valuation Technique | Collateral based measurement
Level 3 [Member] | Mortgage servicing rights [Member] |
Unobservable inputs in recurring and nonrecurring level three fair value measurements |
Fair Value at September 30, 2012 | 4,602
Valuation Technique | Discounted cashflows
Maximum [Member] | Level 3 [Member] | Impaired loans [Member] |
Unobservable inputs in recurring and nonrecurring level three fair value measurements |
Range (Weighted Average) | 50.00%
Maximum [Member] | Level 3 [Member] | Mortgage servicing rights [Member] |
Unobservable inputs in recurring and nonrecurring level three fair value measurements |
Range (Weighted Average) | 20.00%
Minimum [Member] | Level 3 [Member] | Impaired loans [Member] |
Unobservable inputs in recurring and nonrecurring level three fair value measurements |
Range (Weighted Average) | 0.00%
Minimum [Member] | Level 3 [Member] | Mortgage servicing rights [Member] |
Unobservable inputs in recurring and nonrecurring level three fair value measurements |
Range (Weighted Average) | 0.00%

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- Definition Fair value measurements weighted average range. + References No definition available. + Details
Name: | hbnc_FairValueMeasurementsWeightedAverageRange
Namespace Prefix: | hbnc_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | instant

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- Definition Fair value measurement with unobservable inputs recurring and nonrecurring basis excluding goodwill. + References No definition available. + Details
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Namespace Prefix: | hbnc_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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

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- Definition This element represents the aggregate of the assets reported on the balance sheet at period end measured at fair value by the entity. This element is intended to be used in connection with the fair value disclosures required in the footnote disclosures to the financial statements. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=7578670&loc=d3e19207-110258 + Details
Name: | us-gaap_AssetsFairValueDisclosure
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

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- Definition Description of the inputs and valuation technique(s) used to measure fair value. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (bbb) -URI http://asc.fasb.org/extlink&oid=7578670&loc=d3e19207-110258 + Details
Name: | us-gaap_FairValueMeasurementsValuationTechniques
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration