Capital Issuances	12 Months Ended
Dec. 31, 2018
Equity [Abstract]
Capital Issuances	CAPITAL ISSUANCES Common Stock For a description of the issuance of shares of Heartland common stock in connection with acquisitions, see Note 2, "Acquisitions," of the consolidated financial statements. For a description of the issuance of shares of Heartland common stock in connection with the 2012 Long-Term Incentive Plan and the 2016 ESPP, see Note 16, "Stock-Based Compensation." Series D Preferred Stock In connection with the acquisition of CIC Bancshares, Inc. on February 5, 2016, Heartland issued 3,000 shares of 7.0% Senior Non-Cumulative Perpetual Convertible Stock, Series D (the "Series D Preferred Stock") in exchange for 3,000 outstanding shares of 7.0% Senior Non-Cumulative Perpetual Convertible Stock, Series B, of CIC Bancshares, Inc. During 2016, 2017 and 2018, all issued and outstanding shares of Series D Preferred Stock were converted into Heartland common stock. As a result, no shares of the Series D Preferred Stock remain outstanding. Shelf Registration Heartland filed a universal shelf registration with the SEC to register debt or equity securities on July 29, 2016 that expires in July 2019. This registration statement, which was effective immediately, provides Heartland the ability to raise capital, subject to market conditions and SEC rules and limitations, if Heartland's board of directors decides to do so. This registration statement permits Heartland, from time to time, in one more public offerings, to offer debt securities, subordinated notes, common stock, preferred stock, rights or any combination of these securities. Under this registration statement, on November 2, 2016, Heartland commenced a public offering of 1,379,690 shares of common stock at $36.24 per share, and the offering closed on November 8, 2016. The offering resulted in net proceeds of approximately $49.7 million after deducting estimated offering expenses payable by Heartland. All of the shares of common stock included in the offering are primary shares. Heartland used the net proceeds from this offering for general corporate purposes, which may include, among other things, working capital, debt repayment or financing potential acquisitions.

CAPITAL ISSUANCES

Common Stock

For a description of the issuance of shares of Heartland common stock in connection with acquisitions, see Note 2, "Acquisitions," of the consolidated financial statements. For a description of the issuance of shares of Heartland common stock in connection with the 2012 Long-Term Incentive Plan and the 2016 ESPP, see Note 16, "Stock-Based Compensation."

Series D Preferred Stock

In connection with the acquisition of CIC Bancshares, Inc. on February 5, 2016, Heartland issued 3,000 shares of 7.0% Senior Non-Cumulative Perpetual Convertible Stock, Series D (the "Series D Preferred Stock") in exchange for 3,000 outstanding shares of 7.0% Senior Non-Cumulative Perpetual Convertible Stock, Series B, of CIC Bancshares, Inc. During 2016, 2017 and 2018, all issued and outstanding shares of Series D Preferred Stock were converted into Heartland common stock. As a result, no shares of the Series D Preferred Stock remain outstanding.

Shelf Registration

Heartland filed a universal shelf registration with the SEC to register debt or equity securities on July 29, 2016 that expires in July 2019. This registration statement, which was effective immediately, provides Heartland the ability to raise capital, subject to market conditions and SEC rules and limitations, if Heartland's board of directors decides to do so. This registration statement permits Heartland, from time to time, in one more public offerings, to offer debt securities, subordinated notes, common stock, preferred stock, rights or any combination of these securities.

Under this registration statement, on November 2, 2016, Heartland commenced a public offering of 1,379,690 shares of common stock at $36.24 per share, and the offering closed on November 8, 2016. The offering resulted in net proceeds of approximately $49.7 million after deducting estimated offering expenses payable by Heartland. All of the shares of common stock included in the offering are primary shares. Heartland used the net proceeds from this offering for general corporate purposes, which may include, among other things, working capital, debt repayment or financing potential acquisitions.