Income Tax - Reconciliation of Deferred Tax Assets & Liabilities (Detail) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013
Assets
Allowance for loan losses	$ 5,680	$ 5,677
Net operating loss	3,509	2,977
Director and employee benefits	1,953	1,828
Unrealized loss on AFS securities and fair value hedge	588	931
Other	596us-gaap_DeferredTaxAssetsOther	537us-gaap_DeferredTaxAssetsOther
Total assets	12,326us-gaap_DeferredTaxAssetsNet	11,950us-gaap_DeferredTaxAssetsNet
Liabilities
Depreciation	(1,563)hbnc_DeferredTaxLiabilitiesDepreciation	(1,424)hbnc_DeferredTaxLiabilitiesDepreciation
Difference in expense recognition		(368)
State tax	(126)hbnc_DeferredTaxLiabilitiesStateTax	(236)hbnc_DeferredTaxLiabilitiesStateTax
Federal Home Loan Bank stock dividends	(200)	(295)
Difference in basis of intangible assets	(2,839)	(2,189)
FHLB Penalty	(283)hbnc_DeferredTaxLiabilitiesFhlbPenalty	(508)hbnc_DeferredTaxLiabilitiesFhlbPenalty
Other	(1,303)us-gaap_DeferredTaxLiabilitiesOther	(1,188)us-gaap_DeferredTaxLiabilitiesOther
Total liabilities	(6,314)us-gaap_DeferredTaxLiabilities	(6,208)us-gaap_DeferredTaxLiabilities
Net deferred tax asset	$ 6,012us-gaap_DeferredTaxAssetsLiabilitiesNet	$ 5,742us-gaap_DeferredTaxAssetsLiabilitiesNet

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Deferred tax liabilities FHLB penalty.

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