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Income Tax - Additional Information (Detail) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2014
State Tax Jurisdiction [Member]
Income Taxes [Line Items]
Operating loss carry forwards	$ 10.9us-gaap_OperatingLossCarryforwards / us-gaap_IncomeTaxAuthorityAxis = hbnc_StateTaxJurisdictionMember
Federal Jurisdiction [Member]
Income Taxes [Line Items]
Operating loss carry forwards	$ 7.6us-gaap_OperatingLossCarryforwards / us-gaap_IncomeTaxAuthorityAxis = hbnc_FederalJurisdictionMember
Operating loss carry forward expiration year	2029
Minimum [Member] | State Tax Jurisdiction [Member]
Income Taxes [Line Items]
Operating loss carry forward expiration year	2014

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Operating loss carryforward expiration year.

+ References

No definition available.

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Amount of operating loss carryforward, before tax effects, available to reduce future taxable income under enacted tax laws.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 740

-SubTopic 10

-Section 50

-Paragraph 3

-Subparagraph (a)

-URI http://asc.fasb.org/extlink&oid=6907707&loc=d3e32559-109319

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