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Accounting for Certain Loans Acquired in a Transfer (Tables) | 12 Months Ended
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Dec. 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 are as follows:
|  | Twelve Months Ended December 31, 2017 |
|  | Heartland |  |  | Summit |  |  | Peoples |  |  | Kosciusko |  |  | LaPorte |  |  | Lafayette |  |  | Wolverine |  |  | Total |
Balance at January 1 |  | $ | 557 |  |  | $ | 502 |  |  | $ | 389 |  |  | $ | 530 |  |  | $ | 1,479 |  |  | $ | — |  |  | $ | — |  |  | $ | 3,457 |
Additions |  |  | — |  |  |  | — |  |  |  | — |  |  |  | — |  |  |  | — |  |  |  | 933 |  |  |  | 2,267 |  |  |  | 3,200 |
Accretion |  |  | (99 | ) |  |  | (353 | ) |  |  | (388 | ) |  |  | (101 | ) |  |  | (235 | ) |  |  | — |  |  |  | — |  |  |  | (1,176 | )
Reclassification from nonaccretable difference |  |  | — |  |  |  | — |  |  |  | — |  |  |  | — |  |  |  | — |  |  |  | — |  |  |  | — |  |  |  | — |
Disposals |  |  | (6 | ) |  |  | (2 | ) |  |  | (1 | ) |  |  | (43 | ) |  |  | (264 | ) |  |  | — |  |  |  | — |  |  |  | (316 | )
Balance at December 31 |  | $ | 452 |  |  | $ | 147 |  |  | $ | — |  |  | $ | 386 |  |  | $ | 980 |  |  | $ | 933 |  |  | $ | 2,267 |  |  | $ | 5,165 |
|  | Twelve Months Ended December 31, 2016 |
|  | Heartland |  |  | Summit |  |  | Peoples |  |  | Kosciusko |  |  | LaPorte |  |  | Lafayette |  |  | Wolverine |  |  | Total |
Balance at January 1 |  | $ | 795 |  |  | $ | 708 |  |  | $ | 555 |  |  | $ | — |  |  | $ | — |  |  | $ | — |  |  | $ | — |  |  | $ | 2,058 |
Additions |  |  | — |  |  |  | — |  |  |  | — |  |  |  | 634 |  |  |  | 1,636 |  |  |  | — |  |  |  | — |  |  |  | 2,270 |
Accretion |  |  | (164 | ) |  |  | (171 | ) |  |  | (106 | ) |  |  | (72 | ) |  |  | (147 | ) |  |  | — |  |  |  | — |  |  |  | (660 | )
Reclassification from nonaccretable difference |  |  | — |  |  |  | — |  |  |  | — |  |  |  | — |  |  |  | — |  |  |  | — |  |  |  | — |  |  |  | — |
Disposals |  |  | (74 | ) |  |  | (35 | ) |  |  | (60 | ) |  |  | (32 | ) |  |  | (10 | ) |  |  | — |  |  |  | — |  |  |  | (211 | )
Balance at December 31 |  | $ | 557 |  |  | $ | 502 |  |  | $ | 389 |  |  | $ | 530 |  |  | $ | 1,479 |  |  | $ | — |  |  | $ | — |  |  | $ | 3,457 |

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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_ReceivablesAcquiredWithDeterioratedCreditQualityAxis=us-gaap_ReceivablesAcquiredWithDeterioratedCreditQualityMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |