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Loan Servicing (Details Textual) (USD $) | 12 Months Ended
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Dec. 31, 2012 | Dec. 31, 2011 | Dec. 31, 2010
Loan Servicing (Textual) [Abstract] |  |  |
Unpaid principal balances of loans serviced for others totaled | $ 772,100,000 | $ 599,100,000 |
Aggregate fair value of capitalized mortgage servicing rights | 6,600,000 | 5,400,000 | 3,700,000
Mortgage servicing rights, net | 5,145,000 | 4,193,000 | 3,372,000
Bank recorded additional impairment | $ 168,000 | $ 53,000 | $ 664,000

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- Definition Additional impairment. + References No definition available. + Details
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Period Type: | duration

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- Definition Capitalized mortgage service right fair value. + References No definition available. + Details
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Namespace Prefix: | hbnc_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

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- Definition Finite lived mortgage servicing rights net of impairment. + References No definition available. + Details
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Namespace Prefix: | hbnc_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
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- Details
Name: | hbnc_LoanServicingTextualAbstract
Namespace Prefix: | hbnc_
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Balance Type: | na
Period Type: | duration

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- Definition Principal amount of service loan outstanding. + References No definition available. + Details
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Balance Type: | debit
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