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Accounting for Certain Loans Acquired in a Transfer (Tables) | 9 Months Ended
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Sep. 30, 2018
Transfers and Servicing [Abstract] |
Accretable Yield or Income Expected to be Collected | Accretable yield, or income expected to be collected for the nine months ended September 30, is as follows:
|  | Nine Months Ended September 30, 2018 |
|  | Beginning balance |  |  | Additions |  |  | Accretion |  |  | Reclassification from nonaccretable difference |  |  | Disposals |  |  | Ending balance |
Heartland |  | $ | 452 |  |  | $ | — |  |  | $ | (77 | ) |  | $ | — |  |  | $ | (193 | ) |  | $ | 182 |
Summit |  |  | 147 |  |  |  | — |  |  |  | (48 | ) |  |  | — |  |  |  | (9 | ) |  |  | 90 |
Kosciusko |  |  | 386 |  |  |  | — |  |  |  | (60 | ) |  |  | — |  |  |  | — |  |  |  | 326 |
LaPorte |  |  | 980 |  |  |  | — |  |  |  | (110 | ) |  |  | — |  |  |  | (7 | ) |  |  | 863 |
Lafayette |  |  | 933 |  |  |  | — |  |  |  | (229 | ) |  |  | — |  |  |  | (16 | ) |  |  | 688 |
Wolverine |  |  | 2,267 |  |  |  | — |  |  |  | (686 | ) |  |  | — |  |  |  | (681 | ) |  |  | 900 |
Total |  | $ | 5,165 |  |  | $ | — |  |  | $ | (1,210 | ) |  | $ | — |  |  | $ | (906 | ) |  | $ | 3,049 |
|  | Nine Months Ended September 30, 2017 |
|  | Beginning balance |  |  | Additions |  |  | Accretion |  |  | Reclassification from nonaccretable difference |  |  | Disposals |  |  | Ending balance |
Heartland |  | $ | 557 |  |  | $ | — |  |  | $ | (99 | ) |  | $ | — |  |  | $ | (6 | ) |  | $ | 452 |
Summit |  |  | 502 |  |  |  | — |  |  |  | (268 | ) |  |  | — |  |  |  | (2 | ) |  |  | 232 |
Peoples |  |  | 389 |  |  |  | — |  |  |  | (388 | ) |  |  | — |  |  |  | (1 | ) |  |  | — |
Kosciusko |  |  | 530 |  |  |  | — |  |  |  | (80 | ) |  |  | — |  |  |  | (42 | ) |  |  | 408 |
LaPorte |  |  | 1,479 |  |  |  | — |  |  |  | (194 | ) |  |  | — |  |  |  | (264 | ) |  |  | 1,021 |
Total |  | $ | 3,457 |  |  | $ | — |  |  | $ | (1,029 | ) |  | $ | — |  |  | $ | (315 | ) |  | $ | 2,113 |

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- Definition Certain loans acquired in transfer not accounted for as debt securities accretable yield movement. + References No definition available. + Details
Name: | hbnc_CertainLoansAcquiredInTransferNotAccountedForAsDebtSecuritiesAccretableYieldMovementTableTextBlock
Namespace Prefix: | hbnc_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration

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- References No definition available. + Details
Name: | us-gaap_TransfersAndServicingAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration