Prospectus excerpt:  We are offering 10,000,000 shares of our 6.375% Series A Cumulative Redeemable Preferred Stock, which we refer to in this prospectus supplement as the Series A preferred stock. Holders of Series A preferred stock will be entitled to cumulative dividends (whether or not declared) from, and including, the date of original issuance at the rate of 6.375% per year of the $25.00 liquidation preference per share (equivalent to an annual rate of $1.59375 per share). Dividends on the Series A preferred stock will be payable quarterly in arrears on the first day of January, April, July and October of each year (provided that if any dividend payment date is not a business day, then the dividend which would otherwise have been payable on that dividend payment date may be paid on the next succeeding business day) when, as and if declared by our board of directors, beginning on April 1, 2013.

We may not redeem the Series A preferred stock prior to February 13, 2018, except pursuant to the special optional redemption and REIT qualification optional redemption provisions described in this prospectus supplement. On or after February 13, 2018, we may, at our option, redeem the Series A preferred stock, in whole at any time or in part from time to time, for cash at a redemption price of $25.00 per share, plus all accumulated and unpaid dividends to, but not including, the date of redemption (referred to herein as the optional redemption). In addition, upon the occurrence of a change of control described herein, as a result of which neither our common stock nor the common securities of the acquiring or surviving entity (or American Depositary Receipts, or ADRs, representing such securities) is listed on the New York Stock Exchange, or NYSE, the NYSE MKT, or the NYSE MKT, or the NASDAQ Stock Market, or NASDAQ, or listed or quoted on a successor exchange or quotation system, we may, at our option, redeem the Series A preferred stock, in whole or in part within 120 days after the first date on which such change of control occurred, for cash at a redemption price of $25.00 per share, plus all accumulated and unpaid dividends to, but not including, the date of redemption (referred to herein as the special optional redemption). Further, if the redemption of a holder's Series A preferred stock is required to prevent a violation of our Ownership Limit (as defined herein), then we may, at our option, redeem the Series A preferred stock of such holder, in such amount required to preserve such qualification, for cash at a redemption price of $25.00 per share, plus all accumulated and unpaid dividends to, but not including, the date of redemption (referred to herein as the REIT qualification optional redemption). If we exercise any of our redemption rights relating to shares of Series A preferred stock, the holders of Series A preferred stock will not have the conversion right described below with respect to the shares of Series A preferred stock called for redemption.