Stockholders' Equity	9 Months Ended
Sep. 30, 2017
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. 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. 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. During the first nine months of 2017, the Company received gross proceeds of $79.4 million, and paid $1.5 million in costs, from the issuance of 4,876,855 shares of its common stock in connection with the ATM Agreements. As of September 30, 2017, the Company has $220.6 million available for sale under the ATM Agreements. In February 2017, the Company’s board of directors authorized a share repurchase plan to acquire up to $300.0 million of the Company’s common and preferred stock. As of September 30, 2017, no shares of either the Company’s common or preferred stock have been repurchased. Future purchases will depend on various factors, including the Company’s capital needs, as well as the Company’s common and preferred stock price.

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.

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.

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. During the first nine months of 2017, the Company received gross proceeds of $79.4 million, and paid $1.5 million in costs, from the issuance of 4,876,855 shares of its common stock in connection with the ATM Agreements. As of September 30, 2017, the Company has $220.6 million available for sale under the ATM Agreements.

In February 2017, the Company’s board of directors authorized a share repurchase plan to acquire up to $300.0 million of the Company’s common and preferred stock. As of September 30, 2017, no shares of either the Company’s common or preferred stock have been repurchased. Future purchases will depend on various factors, including the Company’s capital needs, as well as the Company’s common and preferred stock price.