Basis of Presentation	3 Months Ended
Mar. 31, 2019
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Basis of Presentation	BASIS OF PRESENTATION Overview MidSouth Bancorp (the "Company" or "we") is a bank holding company whose business is primarily conducted through its wholly-owned banking subsidiary, MidSouth Bank (the "Bank"). We operate a full-service banking business and offer a broad range of commercial and retail banking products to our customers. The accompanying unaudited consolidated financial statements for the Company have been prepared in accordance with accounting principles generally accepted in the United States of America ("GAAP") for interim financial information. Accordingly, the financial statements do not include all of the information and footnotes required by GAAP for complete financial statement presentation. The interim consolidated financial statements included herein are unaudited, but reflect all adjustments, consisting of normal and recurring items, which, in the opinion of management, are necessary for fair presentation of the consolidated financial position and result of operations for the interim period presented. All significant intercompany accounts and transactions have been eliminated in consolidation. The results of operations for the three-month period ended March 31, 2019 are not necessarily indicative of the results expected for the full year. These financial statements should be read in conjunction with the financial statements and notes thereto and the report of our independent registered public accounting firm included in the Company’s Annual Report on Form 10-K for the year ended December 31, 2018. Certain amounts have been reclassified to conform with current period presentation. The reclassifications had no effect on net income or shareholders' equity as previously reported. Proposed Merger with Hancock Whitney Corporation On April 30, 2019, the Company entered into a definitive agreement ("Merger Agreement") with Hancock Whitney Corporation ("Hancock Whitney"), whereby MidSouth will merge into Hancock Whitney in a stock-for-stock transaction. The Merger Agreement provides that, upon the terms and subject to the conditions set forth therein, the Company will merge with and into Hancock Whitney, with Hancock Whitney continuing as the surviving corporation. Immediately following the completion of the merger, the Bank will merge with and into Hancock Whitney Corporation's wholly-owned bank subsidiary, Hancock Whitney Bank, with Hancock Whitney Bank continuing as the surviving bank. Subject to the terms and conditions of the Merger Agreement, if the merger is completed, Company shareholders will receive 0.2952 shares of Hancock Whitney Corporation common stock, par value $3.33 per share, for each share of Company common stock, par value $0.10 per share, they hold immediately prior to the merger, plus cash in lieu of fractional shares.

BASIS OF PRESENTATION

Overview

MidSouth Bancorp (the "Company" or "we") is a bank holding company whose business is primarily conducted through its wholly-owned banking subsidiary, MidSouth Bank (the "Bank"). We operate a full-service banking business and offer a broad range of commercial and retail banking products to our customers.

The accompanying unaudited consolidated financial statements for the Company have been prepared in accordance with accounting principles generally accepted in the United States of America ("GAAP") for interim financial information. Accordingly, the financial statements do not include all of the information and footnotes required by GAAP for complete financial statement presentation. The interim consolidated financial statements included herein are unaudited, but reflect all adjustments, consisting of normal and recurring items, which, in the opinion of management, are necessary for fair presentation of the consolidated financial position and result of operations for the interim period presented. All significant intercompany accounts and transactions have been eliminated in consolidation. The results of operations for the three-month period ended March 31, 2019 are not necessarily indicative of the results expected for the full year. These financial statements should be read in conjunction with the financial statements and notes thereto and the report of our independent registered public accounting firm included in the Company’s Annual Report on Form 10-K for the year ended December 31, 2018.

Certain amounts have been reclassified to conform with current period presentation. The reclassifications had no effect on net income or shareholders' equity as previously reported.

Proposed Merger with Hancock Whitney Corporation

On April 30, 2019, the Company entered into a definitive agreement ("Merger Agreement") with Hancock Whitney Corporation ("Hancock Whitney"), whereby MidSouth will merge into Hancock Whitney in a stock-for-stock transaction. The Merger Agreement provides that, upon the terms and subject to the conditions set forth therein, the Company will merge with and into Hancock Whitney, with Hancock Whitney continuing as the surviving corporation. Immediately following the completion of the merger, the Bank will merge with and into Hancock Whitney Corporation's wholly-owned bank subsidiary, Hancock Whitney Bank, with Hancock Whitney Bank continuing as the surviving bank. Subject to the terms and conditions of the Merger Agreement, if the merger is completed, Company shareholders will receive 0.2952 shares of Hancock Whitney Corporation common stock, par value $3.33 per share, for each share of Company common stock, par value $0.10 per share, they hold immediately prior to the merger, plus cash in lieu of fractional shares.