Pending Merger	3 Months Ended
Mar. 31, 2019
Business Combinations [Abstract]
Pending Merger	PENDING MERGER MBT Financial Corp. On October 9, 2018, the Corporation and MBT Financial Corp., a Michigan corporation ("MBT"), entered into an Agreement and Plan of Reorganization and Merger (the "Merger Agreement"), pursuant to which MBT will, subject to the terms and conditions of the Merger Agreement, merge with and into the Corporation (the "Holding Company Merger"), whereupon the separate corporate existence of MBT will cease and the Corporation will survive. Immediately following the Holding Company Merger, MBT's wholly-owned subsidiary, Monroe Bank & Trust, will be merged with and into the Bank (the "Bank Merger" and, together with the Holding Company Merger, the "Mergers"), with the Bank continuing as the surviving bank. Based on the closing price of the Corporation's common stock on October 9, 2018 of $45.71 per share, the transaction value is estimated at approximately $290.9 million. The transaction is expected to be a tax-free exchange for MBT's shareholders who will be receiving the Corporation's common stock pursuant to the Holding Company Merger. MBT's total assets as of March 31, 2019 were $1.3 billion. At a special meeting held on February 14, 2019, the shareholders of MBT approved the Merger Agreement and the transactions contemplated by the Merger Agreement. In addition, on January 3, 2019, the FDIC issued its order approving the Bank Merger, subject to certain customary conditions, and on February 18, 2019, the Indiana DFI approved the Bank Merger. However, consummation of the Mergers remain subject to the (i) receipt of a waiver by the Federal Reserve Board of Governors relating to its right to receive an application in connection with the Holding Company Merger, and (ii) satisfaction of other customary closing conditions contained in the Merger Agreement. The Mergers are expected to close during the first half of 2019.

Pending Merger

3 Months Ended

Mar. 31, 2019

PENDING MERGER

MBT Financial Corp.

On October 9, 2018, the Corporation and MBT Financial Corp., a Michigan corporation ("MBT"), entered into an Agreement and Plan of Reorganization and Merger (the "Merger Agreement"), pursuant to which MBT will, subject to the terms and conditions of the Merger Agreement, merge with and into the Corporation (the "Holding Company Merger"), whereupon the separate corporate existence of MBT will cease and the Corporation will survive. Immediately following the Holding Company Merger, MBT's wholly-owned subsidiary, Monroe Bank & Trust, will be merged with and into the Bank (the "Bank Merger" and, together with the Holding Company Merger, the "Mergers"), with the Bank continuing as the surviving bank. Based on the closing price of the Corporation's common stock on October 9, 2018 of $45.71 per share, the transaction value is estimated at approximately $290.9 million. The transaction is expected to be a tax-free exchange for MBT's shareholders who will be receiving the Corporation's common stock pursuant to the Holding Company Merger. MBT's total assets as of March 31, 2019 were $1.3 billion.

At a special meeting held on February 14, 2019, the shareholders of MBT approved the Merger Agreement and the transactions contemplated by the Merger Agreement. In addition, on January 3, 2019, the FDIC issued its order approving the Bank Merger, subject to certain customary conditions, and on February 18, 2019, the Indiana DFI approved the Bank Merger. However, consummation of the Mergers remain subject to the (i) receipt of a waiver by the Federal Reserve Board of Governors relating to its right to receive an application in connection with the Holding Company Merger, and (ii) satisfaction of other customary closing conditions contained in the Merger Agreement. The Mergers are expected to close during the first half of 2019.