Business Combinations	3 Months Ended
Mar. 31, 2016
Business Combinations [Abstract]
Business Combinations	Note 15 – Business Combinations On February 4, 2016, Horizon entered into an Agreement and Plan of Merger (the “Merger Agreement”) providing for Horizon’s acquisition of Kosciusko Financial, Inc., an Indiana corporation (“Kosciusko”). Pursuant to the Merger Agreement, Kosciusko would merge with and into Horizon, with Horizon surviving the merger (the “Merger”), and Farmers State Bank, a state chartered bank and wholly-owned subsidiary of Kosciusko, would merge with and into a wholly-owned subsidiary of Horizon, Horizon Bank, N.A. (“Horizon Bank”), with Horizon Bank as the surviving bank. The boards of directors of each of Horizon and Kosciusko have approved the Merger and the Merger Agreement. The regulatory approvals have been received. Subject to the approval of the Merger by Kosciusko shareholders and other closing conditions, the parties anticipate completing the Merger during the second quarter of 2016. In connection with the Merger, shareholders of Kosciusko will have the option to receive $81.75 per share in cash or 3.0122 shares of Horizon common stock for each share of Kosciusko’s common stock or a combination thereof, provided the overall shares exchanged consist of 65% stock and 35% cash. Based upon the February 3, 2016, closing price of $23.99 per share of Horizon common stock, the transaction has an implied valuation of approximately $22.5 million. Subject to certain terms and conditions, the board of directors of Kosciusko has agreed to recommend the approval and adoption of the Merger Agreement to the Kosciusko shareholders and will solicit proxies voting in favor of the Merger from Kosciusko’s shareholders. The Merger Agreement also provides for certain termination rights for both Horizon and Kosciusko, and further provides that upon termination of the Merger Agreement under certain circumstances, Kosciusko will be obligated to pay Horizon a termination fee. As of December 31, 2015, Kosciusko reported total assets of approximately $148.2 million, total deposits of approximately $122.8 million and total loans of approximately $106.1 million. On March 10, 2016, Horizon entered into an Agreement and Plan of Merger (the “Merger Agreement”) providing for Horizon’s acquisition of LaPorte Bancorp, Inc. (“LaPorte Bancorp”). Pursuant to the Merger Agreement, LaPorte Bancorp would merge with and into Horizon, with Horizon surviving the merger (the “Merger”), and The LaPorte Savings Bank, a state chartered bank and wholly-owned subsidiary of LaPorte Bancorp, would merge with and into a wholly-owned subsidiary of Horizon, Horizon Bank, N.A. (“Horizon Bank”), with Horizon Bank as the surviving bank. The boards of directors of each of Horizon and LaPorte Bancorp have approved the Merger and the Merger Agreement. Subject to the approval of the Merger by LaPorte Bancorp shareholders, regulatory approvals and other closing conditions, the parties anticipate completing the Merger during the third quarter of 2016. In connection with the Merger, shareholders of LaPorte Bancorp will have the option to receive $17.50 per share in cash or 0.629 shares of Horizon common stock for each share of LaPorte Bancorp’s common stock or a combination thereof, provided the overall shares exchanged consist of 65% stock and 35% cash. Based upon the March 9, 2016, closing price of $24.21 per share of Horizon common stock, the transaction has an implied valuation of approximately $94.1 million. Subject to certain terms and conditions, the board of directors of LaPorte Bancorp has agreed to recommend the approval and adoption of the Merger Agreement to the LaPorte Bancorp shareholders and will solicit proxies voting in favor of the Merger from LaPorte Bancorp’s shareholders. The Merger Agreement also provides for certain termination rights for both Horizon and LaPorte Bancorp, and further provides that upon termination of the Merger Agreement under certain circumstances, LaPorte Bancorp will be obligated to pay Horizon a termination fee. As of December 31, 2015, LaPorte Bancorp reported total assets of approximately $543.2 million, total deposits of approximately $391.0 million and total loans of approximately $348.5 million.

Note 15 – Business Combinations

On February 4, 2016, Horizon entered into an Agreement and Plan of Merger (the “Merger Agreement”) providing for Horizon’s acquisition of Kosciusko Financial, Inc., an Indiana corporation (“Kosciusko”). Pursuant to the Merger Agreement, Kosciusko would merge with and into Horizon, with Horizon surviving the merger (the “Merger”), and Farmers State Bank, a state chartered bank and wholly-owned subsidiary of Kosciusko, would merge with and into a wholly-owned subsidiary of Horizon, Horizon Bank, N.A. (“Horizon Bank”), with Horizon Bank as the surviving bank.

The boards of directors of each of Horizon and Kosciusko have approved the Merger and the Merger Agreement. The regulatory approvals have been received. Subject to the approval of the Merger by Kosciusko shareholders and other closing conditions, the parties anticipate completing the Merger during the second quarter of 2016.

In connection with the Merger, shareholders of Kosciusko will have the option to receive $81.75 per share in cash or 3.0122 shares of Horizon common stock for each share of Kosciusko’s common stock or a combination thereof, provided the overall shares exchanged consist of 65% stock and 35% cash. Based upon the February 3, 2016, closing price of $23.99 per share of Horizon common stock, the transaction has an implied valuation of approximately $22.5 million.

Subject to certain terms and conditions, the board of directors of Kosciusko has agreed to recommend the approval and adoption of the Merger Agreement to the Kosciusko shareholders and will solicit proxies voting in favor of the Merger from Kosciusko’s shareholders.

The Merger Agreement also provides for certain termination rights for both Horizon and Kosciusko, and further provides that upon termination of the Merger Agreement under certain circumstances, Kosciusko will be obligated to pay Horizon a termination fee.

As of December 31, 2015, Kosciusko reported total assets of approximately $148.2 million, total deposits of approximately $122.8 million and total loans of approximately $106.1 million.

On March 10, 2016, Horizon entered into an Agreement and Plan of Merger (the “Merger Agreement”) providing for Horizon’s acquisition of LaPorte Bancorp, Inc. (“LaPorte Bancorp”). Pursuant to the Merger Agreement, LaPorte Bancorp would merge with and into Horizon, with Horizon surviving the merger (the “Merger”), and The LaPorte Savings Bank, a state chartered bank and wholly-owned subsidiary of LaPorte Bancorp, would merge with and into a wholly-owned subsidiary of Horizon, Horizon Bank, N.A. (“Horizon Bank”), with Horizon Bank as the surviving bank.

The boards of directors of each of Horizon and LaPorte Bancorp have approved the Merger and the Merger Agreement. Subject to the approval of the Merger by LaPorte Bancorp shareholders, regulatory approvals and other closing conditions, the parties anticipate completing the Merger during the third quarter of 2016.

In connection with the Merger, shareholders of LaPorte Bancorp will have the option to receive $17.50 per share in cash or 0.629 shares of Horizon common stock for each share of LaPorte Bancorp’s common stock or a combination thereof, provided the overall shares exchanged consist of 65% stock and 35% cash. Based upon the March 9, 2016, closing price of $24.21 per share of Horizon common stock, the transaction has an implied valuation of approximately $94.1 million.

Subject to certain terms and conditions, the board of directors of LaPorte Bancorp has agreed to recommend the approval and adoption of the Merger Agreement to the LaPorte Bancorp shareholders and will solicit proxies voting in favor of the Merger from LaPorte Bancorp’s shareholders.

The Merger Agreement also provides for certain termination rights for both Horizon and LaPorte Bancorp, and further provides that upon termination of the Merger Agreement under certain circumstances, LaPorte Bancorp will be obligated to pay Horizon a termination fee.

As of December 31, 2015, LaPorte Bancorp reported total assets of approximately $543.2 million, total deposits of approximately $391.0 million and total loans of approximately $348.5 million.