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v2.4.1.9

Condensed Financial Information (Parent Company Only) - Condensed Statements of Cash Flows (Detail) (USD $) In Thousands, unless otherwise specified | 12 Months Ended
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Dec. 31, 2014 | Dec. 31, 2013 | Dec. 31, 2012
Operating Activities |  |  |
Net income | $ 18,101 us-gaap_NetIncomeLoss | $ 19,876 us-gaap_NetIncomeLoss | $ 19,543 us-gaap_NetIncomeLoss
Items not requiring (providing) cash |  |  |
Share based compensation | 203 us-gaap_ShareBasedCompensation | 48 us-gaap_ShareBasedCompensation | 33 us-gaap_ShareBasedCompensation
Other assets | (4,945)us-gaap_IncreaseDecreaseInOtherOperatingAssets | 9,905 us-gaap_IncreaseDecreaseInOtherOperatingAssets | 1,030 us-gaap_IncreaseDecreaseInOtherOperatingAssets
Other liabilities | 712 us-gaap_IncreaseDecreaseInOtherOperatingLiabilities | 498 us-gaap_IncreaseDecreaseInOtherOperatingLiabilities | (3,072)us-gaap_IncreaseDecreaseInOtherOperatingLiabilities
Net cash provided by operating activities | 17,665 us-gaap_NetCashProvidedByUsedInOperatingActivitiesContinuingOperations | 46,965 us-gaap_NetCashProvidedByUsedInOperatingActivitiesContinuingOperations | 26,346 us-gaap_NetCashProvidedByUsedInOperatingActivitiesContinuingOperations
Investing Activities |  |  |
Net cash provided by (used in) by investing activities | (149,046)us-gaap_NetCashProvidedByUsedInInvestingActivitiesContinuingOperations | 49,797 us-gaap_NetCashProvidedByUsedInInvestingActivitiesContinuingOperations | (60,383)us-gaap_NetCashProvidedByUsedInInvestingActivitiesContinuingOperations
Financing Activities |  |  |
Dividends paid on preferred shares | (133)us-gaap_PaymentsOfDividendsPreferredStockAndPreferenceStock | (370)us-gaap_PaymentsOfDividendsPreferredStockAndPreferenceStock | (481)us-gaap_PaymentsOfDividendsPreferredStockAndPreferenceStock
Dividends paid on common shares | (4,744)us-gaap_PaymentsOfDividendsCommonStock | (3,655)us-gaap_PaymentsOfDividendsCommonStock | (3,047)us-gaap_PaymentsOfDividendsCommonStock
Net cash provided by (used in) financing activities | 143,136 us-gaap_NetCashProvidedByUsedInFinancingActivitiesContinuingOperations | (95,776)us-gaap_NetCashProvidedByUsedInFinancingActivitiesContinuingOperations | 44,325 us-gaap_NetCashProvidedByUsedInFinancingActivitiesContinuingOperations
Net Change in Cash and Cash Equivalents | 11,755 us-gaap_CashAndCashEquivalentsPeriodIncreaseDecrease | 986 us-gaap_CashAndCashEquivalentsPeriodIncreaseDecrease | 10,288 us-gaap_CashAndCashEquivalentsPeriodIncreaseDecrease
Cash and Cash Equivalents, Beginning of Period | 31,721 us-gaap_CashAndCashEquivalentsAtCarryingValue | 30,735 us-gaap_CashAndCashEquivalentsAtCarryingValue | 20,447 us-gaap_CashAndCashEquivalentsAtCarryingValue
Cash and Cash Equivalents, End of Period | 43,476 us-gaap_CashAndCashEquivalentsAtCarryingValue | 31,721 us-gaap_CashAndCashEquivalentsAtCarryingValue | 30,735 us-gaap_CashAndCashEquivalentsAtCarryingValue
Summit [Member] |  |  |
Investing Activities |  |  |
Acquisition of businesses | 7,914 us-gaap_PaymentsForProceedsFromBusinessesAndInterestInAffiliates / us-gaap_BusinessAcquisitionAxis = hbnc_SummitMember |  |
Heartland [Member] |  |  |
Investing Activities |  |  |
Acquisition of businesses |  |  | 26,283 us-gaap_PaymentsForProceedsFromBusinessesAndInterestInAffiliates / us-gaap_BusinessAcquisitionAxis = hbnc_HeartlandMember
Parent Company [Member] |  |  |
Operating Activities |  |  |
Net income | 18,101 us-gaap_NetIncomeLoss / dei_LegalEntityAxis = us-gaap_ParentCompanyMember | 19,876 us-gaap_NetIncomeLoss / dei_LegalEntityAxis = us-gaap_ParentCompanyMember | 19,543 us-gaap_NetIncomeLoss / dei_LegalEntityAxis = us-gaap_ParentCompanyMember
Items not requiring (providing) cash |  |  |
Equity in undistributed net income of subsidiaries | (6,814)us-gaap_IncomeLossFromEquityMethodInvestments / dei_LegalEntityAxis = us-gaap_ParentCompanyMember | (13,144)us-gaap_IncomeLossFromEquityMethodInvestments / dei_LegalEntityAxis = us-gaap_ParentCompanyMember | (4,766)us-gaap_IncomeLossFromEquityMethodInvestments / dei_LegalEntityAxis = us-gaap_ParentCompanyMember
Income taxes receivable | 434 us-gaap_IncreaseDecreaseInIncomeTaxesReceivable / dei_LegalEntityAxis = us-gaap_ParentCompanyMember | (793)us-gaap_IncreaseDecreaseInIncomeTaxesReceivable / dei_LegalEntityAxis = us-gaap_ParentCompanyMember | (137)us-gaap_IncreaseDecreaseInIncomeTaxesReceivable / dei_LegalEntityAxis = us-gaap_ParentCompanyMember
Share based compensation | 203 us-gaap_ShareBasedCompensation / dei_LegalEntityAxis = us-gaap_ParentCompanyMember | 48 us-gaap_ShareBasedCompensation / dei_LegalEntityAxis = us-gaap_ParentCompanyMember | 33 us-gaap_ShareBasedCompensation / dei_LegalEntityAxis = us-gaap_ParentCompanyMember
Amortization of unearned compensation | 363 us-gaap_AdjustmentForAmortization / dei_LegalEntityAxis = us-gaap_ParentCompanyMember | 288 us-gaap_AdjustmentForAmortization / dei_LegalEntityAxis = us-gaap_ParentCompanyMember | 187 us-gaap_AdjustmentForAmortization / dei_LegalEntityAxis = us-gaap_ParentCompanyMember
Issuance of restricted shares |  |  | 115 us-gaap_RestrictedStockExpense / dei_LegalEntityAxis = us-gaap_ParentCompanyMember
Other assets | 472 us-gaap_IncreaseDecreaseInOtherOperatingAssets / dei_LegalEntityAxis = us-gaap_ParentCompanyMember | 626 us-gaap_IncreaseDecreaseInOtherOperatingAssets / dei_LegalEntityAxis = us-gaap_ParentCompanyMember | (176)us-gaap_IncreaseDecreaseInOtherOperatingAssets / dei_LegalEntityAxis = us-gaap_ParentCompanyMember
Other liabilities | 1,377 us-gaap_IncreaseDecreaseInOtherOperatingLiabilities / dei_LegalEntityAxis = us-gaap_ParentCompanyMember | 97 us-gaap_IncreaseDecreaseInOtherOperatingLiabilities / dei_LegalEntityAxis = us-gaap_ParentCompanyMember | 1,128 us-gaap_IncreaseDecreaseInOtherOperatingLiabilities / dei_LegalEntityAxis = us-gaap_ParentCompanyMember
Net cash provided by operating activities | 14,136 us-gaap_NetCashProvidedByUsedInOperatingActivitiesContinuingOperations / dei_LegalEntityAxis = us-gaap_ParentCompanyMember | 6,998 us-gaap_NetCashProvidedByUsedInOperatingActivitiesContinuingOperations / dei_LegalEntityAxis = us-gaap_ParentCompanyMember | 15,927 us-gaap_NetCashProvidedByUsedInOperatingActivitiesContinuingOperations / dei_LegalEntityAxis = us-gaap_ParentCompanyMember
Investing Activities |  |  |
Net cash provided by (used in) by investing activities | (7,036)us-gaap_NetCashProvidedByUsedInInvestingActivitiesContinuingOperations / dei_LegalEntityAxis = us-gaap_ParentCompanyMember |  | (7,248)us-gaap_NetCashProvidedByUsedInInvestingActivitiesContinuingOperations / dei_LegalEntityAxis = us-gaap_ParentCompanyMember
Financing Activities |  |  |
Dividends paid on preferred shares | (133)us-gaap_PaymentsOfDividendsPreferredStockAndPreferenceStock / dei_LegalEntityAxis = us-gaap_ParentCompanyMember | (370)us-gaap_PaymentsOfDividendsPreferredStockAndPreferenceStock / dei_LegalEntityAxis = us-gaap_ParentCompanyMember | (481)us-gaap_PaymentsOfDividendsPreferredStockAndPreferenceStock / dei_LegalEntityAxis = us-gaap_ParentCompanyMember
Dividends paid on common shares | (4,744)us-gaap_PaymentsOfDividendsCommonStock / dei_LegalEntityAxis = us-gaap_ParentCompanyMember | (3,655)us-gaap_PaymentsOfDividendsCommonStock / dei_LegalEntityAxis = us-gaap_ParentCompanyMember | (3,047)us-gaap_PaymentsOfDividendsCommonStock / dei_LegalEntityAxis = us-gaap_ParentCompanyMember
Exercise of stock options | 165 us-gaap_ProceedsFromStockOptionsExercised / dei_LegalEntityAxis = us-gaap_ParentCompanyMember | 195 us-gaap_ProceedsFromStockOptionsExercised / dei_LegalEntityAxis = us-gaap_ParentCompanyMember | 226 us-gaap_ProceedsFromStockOptionsExercised / dei_LegalEntityAxis = us-gaap_ParentCompanyMember
Net cash provided by (used in) financing activities | (4,712)us-gaap_NetCashProvidedByUsedInFinancingActivitiesContinuingOperations / dei_LegalEntityAxis = us-gaap_ParentCompanyMember | (3,830)us-gaap_NetCashProvidedByUsedInFinancingActivitiesContinuingOperations / dei_LegalEntityAxis = us-gaap_ParentCompanyMember | (3,302)us-gaap_NetCashProvidedByUsedInFinancingActivitiesContinuingOperations / dei_LegalEntityAxis = us-gaap_ParentCompanyMember
Net Change in Cash and Cash Equivalents | 2,388 us-gaap_CashAndCashEquivalentsPeriodIncreaseDecrease / dei_LegalEntityAxis = us-gaap_ParentCompanyMember | 3,168 us-gaap_CashAndCashEquivalentsPeriodIncreaseDecrease / dei_LegalEntityAxis = us-gaap_ParentCompanyMember | 5,377 us-gaap_CashAndCashEquivalentsPeriodIncreaseDecrease / dei_LegalEntityAxis = us-gaap_ParentCompanyMember
Cash and Cash Equivalents, Beginning of Period | 16,807 us-gaap_CashAndCashEquivalentsAtCarryingValue / dei_LegalEntityAxis = us-gaap_ParentCompanyMember | 13,639 us-gaap_CashAndCashEquivalentsAtCarryingValue / dei_LegalEntityAxis = us-gaap_ParentCompanyMember | 8,262 us-gaap_CashAndCashEquivalentsAtCarryingValue / dei_LegalEntityAxis = us-gaap_ParentCompanyMember
Cash and Cash Equivalents, End of Period | 19,195 us-gaap_CashAndCashEquivalentsAtCarryingValue / dei_LegalEntityAxis = us-gaap_ParentCompanyMember | 16,807 us-gaap_CashAndCashEquivalentsAtCarryingValue / dei_LegalEntityAxis = us-gaap_ParentCompanyMember | 13,639 us-gaap_CashAndCashEquivalentsAtCarryingValue / dei_LegalEntityAxis = us-gaap_ParentCompanyMember
Parent Company [Member] | Summit [Member] |  |  |
Investing Activities |  |  |
Acquisition of businesses | (7,036)us-gaap_PaymentsForProceedsFromBusinessesAndInterestInAffiliates / us-gaap_BusinessAcquisitionAxis = hbnc_SummitMember / dei_LegalEntityAxis = us-gaap_ParentCompanyMember |  |
Parent Company [Member] | Heartland [Member] |  |  |
Investing Activities |  |  |
Acquisition of businesses |  |  | $ (7,248)us-gaap_PaymentsForProceedsFromBusinessesAndInterestInAffiliates / us-gaap_BusinessAcquisitionAxis = hbnc_HeartlandMember / dei_LegalEntityAxis = us-gaap_ParentCompanyMember

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- Definition The cash inflow associated with the amount received from holders exercising their stock options. This item inherently excludes any excess tax benefit, which the entity may have realized and reported separately. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Financing Activities -URI http://asc.fasb.org/extlink&oid=6513228 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (j) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 14 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3255-108585 + Details
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- Definition The noncash expense that represents the cost of restricted stock or unit distributed to employees as compensation. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3602-108585 + Details
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- Definition The aggregate amount of noncash, equity-based employee remuneration. This may include the value of stock or unit options, amortization of restricted stock or units, and adjustment for officers' compensation. As noncash, this element is an add back when calculating net cash generated by operating activities using the indirect method. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3602-108585 + Details
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