Stockholders' Equity	6 Months Ended
Jun. 30, 2019
Stockholders' Equity
Stockholders' Equity	9. Stockholders’ Equity Series E Cumulative Redeemable Preferred Stock In March 2016, the Company issued 4,600,000 shares of its 6.95% Series E Cumulative Redeemable Preferred Stock (“Series E preferred stock”) with a liquidation preference of $25.00 per share for gross proceeds of $115.0 million. In conjunction with the offering, the Company incurred $4.0 million in preferred offering costs. On or after March 11, 2021, the Series E preferred stock will be redeemable at the Company’s option, in whole or in part, at any time or from time to time, for cash at a redemption price of $25.00 per share, plus accrued and unpaid dividends up to, but not including, the redemption date. Upon the occurrence of a change of control, as defined by the Articles Supplementary for Series E preferred stock, holders of the Series E preferred stock may, under certain circumstances, convert their preferred shares into shares of the Company’s common stock. Series F Cumulative Redeemable Preferred Stock In May 2016, the Company issued 3,000,000 shares of its 6.45% Series F Cumulative Redeemable Preferred Stock (“Series F preferred stock”) with a liquidation preference of $25.00 per share for gross proceeds of $75.0 million. In conjunction with the offering, the Company incurred $2.6 million in preferred offering costs. On or after May 17, 2021, the Series F preferred stock will be redeemable at the Company’s option, in whole or in part, at any time or from time to time, for cash at a redemption price of $25.00 per share, plus accrued and unpaid dividends up to, but not including, the redemption date. Upon the occurrence of a change of control, as defined by the Articles Supplementary for Series F preferred stock, holders of the Series F preferred stock may, under certain circumstances, convert their preferred shares into shares of the Company’s common stock. Common Stock In February 2017, the Company entered into separate “At the Market” Agreements (the “ATM Agreements”) with each of Merrill Lynch, Pierce, Fenner & Smith Incorporated, J.P. Morgan Securities LLC and Wells Fargo Securities, LLC. In accordance with the terms of the ATM Agreements, the Company may from time to time offer and sell shares of its common stock having an aggregate offering price of up to $300.0 million. The Company did not issue any shares of its common stock in connection with the ATM agreements during the three and six months ended June 30, 2019. During 2017 and 2018, the Company issued a total of 7,467,709 shares of its common stock in connection with the ATM Agreements for gross proceeds of $124.5 million, leaving $175.5 million available for sale under the ATM Agreements. The Company paid a total of $2.3 million in costs during 2017 and 2018 in connection with common stock issued under the ATM Agreements. In February 2017, the Company’s board of directors authorized a stock repurchase program to acquire up to an aggregate of $300.0 million of the Company’s common and preferred stock. During the second quarter of 2019, the Company repurchased 432,464 shares of its common stock for $5.7 million, leaving $294.3 million of remaining authorized capacity under the program (see Note 12). As of June 30, 2019, no shares of the Company’s preferred stock have been repurchased. Future repurchases will depend on various factors, including the Company’s capital needs, as well as the Company’s common and preferred stock price.

Stockholders' Equity

6 Months Ended

Jun. 30, 2019

9. Stockholders’ Equity

Series E Cumulative Redeemable Preferred Stock

In March 2016, the Company issued 4,600,000 shares of its 6.95% Series E Cumulative Redeemable Preferred Stock (“Series E preferred stock”) with a liquidation preference of $25.00 per share for gross proceeds of $115.0 million. In conjunction with the offering, the Company incurred $4.0 million in preferred offering costs. On or after March 11, 2021, the Series E preferred stock will be redeemable at the Company’s option, in whole or in part, at any time or from time to time, for cash at a redemption price of $25.00 per share, plus accrued and unpaid dividends up to, but not including, the redemption date. Upon the occurrence of a change of control, as defined by the Articles Supplementary for Series E preferred stock, holders of the Series E preferred stock may, under certain circumstances, convert their preferred shares into shares of the Company’s common stock.

Series F Cumulative Redeemable Preferred Stock

In May 2016, the Company issued 3,000,000 shares of its 6.45% Series F Cumulative Redeemable Preferred Stock (“Series F preferred stock”) with a liquidation preference of $25.00 per share for gross proceeds of $75.0 million. In conjunction with the offering, the Company incurred $2.6 million in preferred offering costs. On or after May 17, 2021, the Series F preferred stock will be redeemable at the Company’s option, in whole or in part, at any time or from time to time, for cash at a redemption price of $25.00 per share, plus accrued and unpaid dividends up to, but not including, the redemption date. Upon the occurrence of a change of control, as defined by the Articles Supplementary for Series F preferred stock, holders of the Series F preferred stock may, under certain circumstances, convert their preferred shares into shares of the Company’s common stock.

Common Stock

In February 2017, the Company entered into separate “At the Market” Agreements (the “ATM Agreements”) with each of Merrill Lynch, Pierce, Fenner & Smith Incorporated, J.P. Morgan Securities LLC and Wells Fargo Securities, LLC. In accordance with the terms of the ATM Agreements, the Company may from time to time offer and sell shares of its common stock having an

aggregate offering price of up to $300.0 million. The Company did not issue any shares of its common stock in connection with the ATM agreements during the three and six months ended June 30, 2019. During 2017 and 2018, the Company issued a total of 7,467,709 shares of its common stock in connection with the ATM Agreements for gross proceeds of $124.5 million, leaving $175.5 million available for sale under the ATM Agreements. The Company paid a total of $2.3 million in costs during 2017 and 2018 in connection with common stock issued under the ATM Agreements.

In February 2017, the Company’s board of directors authorized a stock repurchase program to acquire up to an aggregate of $300.0 million of the Company’s common and preferred stock. During the second quarter of 2019, the Company repurchased 432,464 shares of its common stock for $5.7 million, leaving $294.3 million of remaining authorized capacity under the program (see Note 12). As of June 30, 2019, no shares of the Company’s preferred stock have been repurchased. Future repurchases will depend on various factors, including the Company’s capital needs, as well as the Company’s common and preferred stock price.