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Accounting for Certain Loans Acquired in a Transfer (Tables) | 3 Months Ended
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Mar. 31, 2017
Loans Purchased With Evidence of Credit Deterioration [Member] |
Accretable Yield or Income Expected to be Collected | Accretable yield, or income expected to be collected for the three months ended March 31, is as follows:
|  | Three Months Ended March 31, 2017 |
|  | Heartland |  |  | Summit |  |  | Peoples |  |  | Kosciusko |  |  | LaPorte |  |  | Total |
Balance at January 1 |  | $ | 557 |  |  | $ | 502 |  |  | $ | 389 |  |  | $ | 530 |  |  | $ | 1,479 |  |  | $ | 3,457 |
Additions |  |  | — |  |  |  | — |  |  |  | — |  |  |  | — |  |  |  | — |  |  |  | — |
Accretion |  |  | (34 | ) |  |  | (93 | ) |  |  | (194 | ) |  |  | (31 | ) |  |  | (81 | ) |  |  | (433 | )
Reclassification from nonaccretable difference |  |  | — |  |  |  | — |  |  |  | — |  |  |  | — |  |  |  | — |  |  |  | — |
Disposals |  |  | (6 | ) |  |  | (2 | ) |  |  | (1 | ) |  |  | — |  |  |  | (110 | ) |  |  | (119 | )
Balance at March 31 |  | $ | 517 |  |  | $ | 407 |  |  | $ | 194 |  |  | $ | 499 |  |  | $ | 1,288 |  |  | $ | 2,905 |
|  | Three Months Ended March 31, 2016 |
|  | Heartland |  |  | Summit |  |  | Peoples |  |  | Kosciusko |  |  | LaPorte |  |  | Total |
Balance at January 1 |  | $ | 795 |  |  | $ | 708 |  |  | $ | 555 |  |  | $ | — |  |  | $ | — |  |  | $ | 2,058 |
Additions |  |  | — |  |  |  | — |  |  |  | — |  |  |  | — |  |  |  | — |  |  |  | — |
Accretion |  |  | (36 | ) |  |  | (55 | ) |  |  | (42 | ) |  |  | — |  |  |  | — |  |  |  | (133 | )
Reclassification from nonaccretable difference |  |  | — |  |  |  | — |  |  |  | — |  |  |  | — |  |  |  | — |  |  |  | — |
Disposals |  |  | (10 | ) |  |  | (4 | ) |  |  | (30 | ) |  |  | — |  |  |  | — |  |  |  | (44 | )
Balance at March 31 |  | $ | 749 |  |  | $ | 649 |  |  | $ | 483 |  |  | $ | — |  |  | $ | — |  |  | $ | 1,881 |

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

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- Details
Name: | us-gaap_ManagingRisksInherentInServicingAssetsAndServicingLiabilitiesByTypeOfRiskAxis=us-gaap_CreditRiskMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |