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Accounting for Certain Loans Acquired in a Transfer (Tables) | 12 Months Ended
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Dec. 31, 2018
Carrying Amounts of Loans | The carrying amounts of those loans included in the balance sheet amounts of loans receivable are as follows:
|  | December 31, 2018 |
|  | Commercial |  |  | Real Estate |  |  | Consumer |  |  | Outstanding Balance |  |  | Allowance for Loan Losses |  |  | Carrying Amount |
Heartland |  | $ | 232 |  |  | $ | 175 |  |  | $ | — |  |  | $ | 407 |  |  | $ | — |  |  | $ | 407 |
Summit |  |  | 323 |  |  |  | 555 |  |  |  | — |  |  |  | 878 |  |  |  | — |  |  |  | 878 |
Peoples |  |  | 270 |  |  |  | 58 |  |  |  | — |  |  |  | 328 |  |  |  | — |  |  |  | 328 |
Kosciusko |  |  | 746 |  |  |  | 155 |  |  |  | — |  |  |  | 901 |  |  |  | — |  |  |  | 901 |
LaPorte |  |  | 753 |  |  |  | 947 |  |  |  | 27 |  |  |  | 1,727 |  |  |  | 60 |  |  |  | 1,667 |
Lafayette |  |  | 3,080 |  |  |  | — |  |  |  | — |  |  |  | 3,080 |  |  |  | — |  |  |  | 3,080 |
Wolverine |  |  | 7,841 |  |  |  | — |  |  |  | — |  |  |  | 7,841 |  |  |  | — |  |  |  | 7,841 |
Total |  | $ | 13,245 |  |  | $ | 1,890 |  |  | $ | 27 |  |  | $ | 15,162 |  |  | $ | 60 |  |  | $ | 15,102 |
|  | December 31, 2017 |
|  | Commercial |  |  | Real Estate |  |  | Consumer |  |  | Outstanding Balance |  |  | Allowance for Loan Losses |  |  | Carrying Amount |
Heartland |  | $ | 390 |  |  | $ | 229 |  |  | $ | — |  |  | $ | 619 |  |  | $ | — |  |  | $ | 619 |
Summit |  |  | 3,653 |  |  |  | 870 |  |  |  | — |  |  |  | 4,523 |  |  |  | — |  |  |  | 4,523 |
Peoples |  |  | 315 |  |  |  | 126 |  |  |  | — |  |  |  | 441 |  |  |  | — |  |  |  | 441 |
Kosciusko |  |  | 838 |  |  |  | 403 |  |  |  | — |  |  |  | 1,241 |  |  |  | — |  |  |  | 1,241 |
LaPorte |  |  | 1,034 |  |  |  | 1,004 |  |  |  | 33 |  |  |  | 2,071 |  |  |  | — |  |  |  | 2,071 |
Lafayette |  |  | 4,271 |  |  |  | — |  |  |  | — |  |  |  | 4,271 |  |  |  | — |  |  |  | 4,271 |
Wolverine |  |  | 16,697 |  |  |  | — |  |  |  | — |  |  |  | 16,697 |  |  |  | — |  |  |  | 16,697 |
Total |  | $ | 27,198 |  |  | $ | 2,632 |  |  | $ | 33 |  |  | $ | 29,863 |  |  | $ | — |  |  | $ | 29,863 |
Accretable Yield or Income Expected to be Collected | Accretable yield, or income expected to be collected are as follows:
|  | Twelve Months Ended December 31, 2018 |
|  | Beginning balance |  |  | Additions |  |  | Accretion |  |  | Reclassification from nonaccretable difference |  |  | Disposals |  |  | Ending balance |
Heartland |  | $ | 452 |  |  | $ | — |  |  | $ | (85 | ) |  | $ | — |  |  | $ | (193 | ) |  | $ | 174 |
Summit |  |  | 147 |  |  |  | — |  |  |  | (54 | ) |  |  | — |  |  |  | (51 | ) |  |  | 42 |
Kosciusko |  |  | 386 |  |  |  | — |  |  |  | (78 | ) |  |  | — |  |  |  | (8 | ) |  |  | 300 |
LaPorte |  |  | 980 |  |  |  | — |  |  |  | (144 | ) |  |  | — |  |  |  | (7 | ) |  |  | 829 |
Lafayette |  |  | 933 |  |  |  | — |  |  |  | (275 | ) |  |  | — |  |  |  | (49 | ) |  |  | 609 |
Wolverine |  |  | 2,267 |  |  |  | — |  |  |  | (812 | ) |  |  | — |  |  |  | (757 | ) |  |  | 698 |
Total |  | $ | 5,165 |  |  | $ | — |  |  | $ | (1,448 | ) |  | $ | — |  |  | $ | (1,065 | ) |  | $ | 2,652 |
|  | Twelve Months Ended December 31, 2017 |
|  | Beginning balance |  |  | Additions |  |  | Accretion |  |  | Reclassification from nonaccretable difference |  |  | Disposals |  |  | Ending balance |
Heartland |  | $ | 557 |  |  | $ | — |  |  | $ | (99 | ) |  | $ | — |  |  | $ | (6 | ) |  | $ | 452 |
Summit |  |  | 502 |  |  |  | — |  |  |  | (353 | ) |  |  | — |  |  |  | (2 | ) |  |  | 147 |
Peoples |  |  | 389 |  |  |  | — |  |  |  | (388 | ) |  |  | — |  |  |  | (1 | ) |  |  | — |
Kosciusko |  |  | 530 |  |  |  | — |  |  |  | (101 | ) |  |  | — |  |  |  | (43 | ) |  |  | 386 |
LaPorte |  |  | 1,479 |  |  |  | — |  |  |  | (235 | ) |  |  | — |  |  |  | (264 | ) |  |  | 980 |
Lafayette |  |  | — |  |  |  | 933 |  |  |  | — |  |  |  | — |  |  |  | — |  |  |  | 933 |
Wolverine |  |  | — |  |  |  | 2,267 |  |  |  | — |  |  |  | — |  |  |  | — |  |  |  | 2,267 |
Total |  | $ | 3,457 |  |  | $ | 3,200 |  |  | $ | (1,176 | ) |  | $ | — |  |  | $ | (316 | ) |  | $ | 5,165 |

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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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- Definition Tabular disclosure of credit losses for current financing receivables (such as trade and accounts receivable), including a rollforward of the balance. An alternative caption includes allowance for doubtful accounts. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 11B -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=84173941&loc=SL6953423-111524 + Details
Name: | us-gaap_ScheduleOfCreditLossesForFinancingReceivablesCurrentTableTextBlock
Namespace Prefix: | us-gaap_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration