Issuances of Common Stock	12 Months Ended
Dec. 31, 2018
Equity [Abstract]
Issuances of Common Stock	Issuances of Common Stock A. Issuance of Common Stock in an Overnight Offering We did not issue any shares in an overnight offering in 2018. In March 2017, we issued 11,850,000 shares of common stock in an overnight offering. After underwriting discounts and other offering costs of $29.8 million, the net proceeds of $704.9 million were used to repay borrowings under our credit facility. In May 2016, we issued 6,500,000 shares of common stock in an overnight offering. After underwriting discounts and other offering costs of $12.1 million, the net proceeds of $383.6 million were used to repay borrowings under our credit facility. B. Dividend Reinvestment and Stock Purchase Plan Our Dividend Reinvestment and Stock Purchase Plan, or our DRSPP, provides our common stockholders, as well as new investors, with a convenient and economical method of purchasing our common stock and reinvesting their distributions. Our DRSPP also allows our current stockholders to buy additional shares of common stock by reinvesting all or a portion of their distributions. Our DRSPP authorizes up to 26,000,000 common shares to be issued. During 2018, we issued 166,268 shares and raised approximately $9.1 million under our DRSPP. During 2017, we issued 1,193,653 shares and raised approximately $69.9 million under our DRSPP. From the inception of our DRSPP through December 31, 2018, we have issued 14,229,810 shares and raised $670.9 million. Our DRSPP includes a waiver approval process, allowing larger investors or institutions, per a formal approval process, to purchase shares at a small discount, if approved by us. We did not issue shares under the waiver approval process during 2018. During 2017, we issued 927,695 shares and raised $54.7 million under the waiver approval process. These shares are included in the total activity for 2017 noted in the preceding paragraph. C. At-the-Market (ATM) Programs In November 2018, following the issuance and sale of 25,038,145 shares under our prior ATM equity distribution plans, or our prior ATM programs, we established a new ATM equity distribution plan, or our new ATM program, pursuant to which up to 28,961,855 additional shares of common stock may be offered and sold (1) by us to, or through, a consortium of banks acting as our sales agents or (2) by a consortium of banks acting as forward sellers on behalf of any forward purchasers contemplated thereunder, in each case by means of ordinary brokers' transactions on the NYSE at prevailing market prices or at negotiated prices. During 2018, we issued 19,138,610 shares and raised gross proceeds of $1.1 billion under our new and prior ATM programs. During 2017, we issued 10,914,088 shares and raised gross proceeds of $621.7 million under our prior ATM programs. From the inception of our new and prior ATM programs through December 31, 2018, we have issued 33,546,139 shares authorized by our ATM programs and raised $2.0 billion. At December 31, 2018, we had 20,453,861 shares remaining for future issuance under our new ATM program.

Issuances of Common Stock

A. Issuance of Common Stock in an Overnight Offering

We did not issue any shares in an overnight offering in 2018. In March 2017, we issued 11,850,000 shares of common stock in an overnight offering. After underwriting discounts and other offering costs of $29.8 million, the net proceeds of $704.9 million were used to repay borrowings under our credit facility.

In May 2016, we issued 6,500,000 shares of common stock in an overnight offering. After underwriting discounts and other offering costs of $12.1 million, the net proceeds of $383.6 million were used to repay borrowings under our credit facility.

B. Dividend Reinvestment and Stock Purchase Plan

Our Dividend Reinvestment and Stock Purchase Plan, or our DRSPP, provides our common stockholders, as well as new investors, with a convenient and economical method of purchasing our common stock and reinvesting their distributions. Our DRSPP also allows our current stockholders to buy additional shares of common stock by reinvesting all or a portion of their distributions. Our DRSPP authorizes up to 26,000,000 common shares to be issued. During 2018, we issued 166,268 shares and raised approximately $9.1 million under our DRSPP. During 2017, we issued 1,193,653 shares and raised approximately $69.9 million under our DRSPP. From the inception of our DRSPP through December 31, 2018, we have issued 14,229,810 shares and raised $670.9 million.

Our DRSPP includes a waiver approval process, allowing larger investors or institutions, per a formal approval process, to purchase shares at a small discount, if approved by us. We did not issue shares under the waiver approval process during 2018. During 2017, we issued 927,695 shares and raised $54.7 million under the waiver approval process. These shares are included in the total activity for 2017 noted in the preceding paragraph.

C. At-the-Market (ATM) Programs

In November 2018, following the issuance and sale of 25,038,145 shares under our prior ATM equity distribution plans, or our prior ATM programs, we established a new ATM equity distribution plan, or our new ATM program, pursuant to which up to 28,961,855 additional shares of common stock may be offered and sold (1) by us to, or through, a consortium of banks acting as our sales agents or (2) by a consortium of banks acting as forward sellers on behalf of any forward purchasers contemplated thereunder, in each case by means of ordinary brokers' transactions on the NYSE at prevailing market prices or at negotiated prices. During 2018, we issued 19,138,610 shares and raised gross proceeds of $1.1 billion under our new and prior ATM programs. During 2017, we issued 10,914,088 shares and raised gross proceeds of $621.7 million under our prior ATM programs. From the inception of our new and prior ATM programs through December 31, 2018, we have issued 33,546,139 shares authorized by our ATM programs and raised $2.0 billion. At December 31, 2018, we had 20,453,861 shares remaining for future issuance under our new ATM program.