Subsequent Events (Notes)	6 Months Ended
Jun. 30, 2017
Subsequent Events [Abstract]
Subsequent Events	Subsequent Events In July 2017, the Company completed a registered underwritten offering of 11 million shares of its common stock at a public offering price of $60.50 per share, plus up to an additional 1.65 million shares of its common stock pursuant to an option granted to the underwriters to purchase additional shares of the Company’s common stock directly from the Company (the “Offering”). Of the 11 million shares of common stock, 5 million shares were offered directly by the Company and 6 million shares were offered in connection with forward sale agreements (the "Forward Sale Agreements") described below. The Offering closed on July 25, 2017. In connection with the Offering, the Company entered into separate Forward Sale Agreements with Morgan Stanley & Co. LLC and JPMorgan Chase Bank, National Association, London Branch (the "Forward Counterparties") pursuant to which the Company has agreed to sell, and each Forward Counterparty agreed to purchase, 3 million shares of the Company’s common stock (or 6 million shares of the Company common stock in the aggregate) subject to the terms and conditions of the Forward Sale Agreements, including the Company’s right to elect cash settlement or net share settlement. The initial forward price under each of the Forward Sale Agreements is $58.08 per share (which is the public offering price of our common stock, less the underwriting discount) and is subject to certain adjustments pursuant to the terms of the Forward Sale Agreements. Settlement of each of the Forward Sale Agreements is expected to occur no later than approximately one year after the closing of the Offering but may occur earlier at the option of the Company or, in certain circumstances described in the Forward Sale Agreements, at the option of the relevant Forward Counterparty. A Forward Counterparty’s decision to exercise its right to accelerate the Forward Sale Agreements entered into with it and to require the Company to settle the Forward Sale Agreements will be made irrespective of the Company’s interests, including the Company’s need for capital. The Company could be required to issue and deliver the Company’s common stock under the terms of the physical settlement provisions of the Forward Sale Agreements irrespective of the Company’s capital needs, which would result in dilution to the Company’s earnings per share and return on equity. The Forward Sales Agreements will be accounted for as equity instruments with subsequent changes in fair value not recognized as long as the contracts continue to be classified as equity. In addition, in connection with the Offering, the Company entered into Amendment No. 1 (the “Revolving Loan Credit Amendment”) to the Company’s Second Amended and Restated Revolving Loan Credit Agreement, dated as of October 30, 2015 (as previously amended, amended and restated, supplemented or otherwise modified, the “Existing Credit Agreement”), by and among the Company and certain subsidiaries signatory thereto, Morgan Stanley Senior Funding, Inc., as agent, and the Lenders party thereto, pursuant to which the Existing Credit Agreement was amended to permit certain transactions, including the transactions contemplated by the Forward Sale Agreements. The Company received proceeds of $290.4 million from the sale of 5 million shares of common stock in the Offering. The Company did not initially receive any proceeds from the sale of shares of its common stock by the Forward Counterparties pursuant to the Forward Sale Agreements. The Company expects to use the net proceeds of the shares issued and sold by the Company in the Offering and any net proceeds received upon the settlement of the Forward Sale Agreements for general corporate purposes, which may include strategic acquisitions and the repayment or refinancing of outstanding indebtedness. In July 2017, the Company issued a notice of redemption for all of its outstanding 7.25% senior notes due January 2018 (the “Notes”). The redemption will occur on August 25, 2017. The redemption price is equal to the sum of the present values of the remaining scheduled payments of principal and interest on the Notes (not including any interest accrued as of the date of the redemption), discounted to the redemption date on a semi-annual basis at a pre-defined treasury rate plus 50 basis points, plus accrued and unpaid interest on the Notes to the redemption date. The redemption will be funded using cash on hand at the date of the redemption.

Subsequent Events

In July 2017, the Company completed a registered underwritten offering of 11 million shares of its common stock at a public offering price of $60.50 per share, plus up to an additional 1.65 million shares of its common stock pursuant to an option granted to the underwriters to purchase additional shares of the Company’s common stock directly from the Company (the “Offering”). Of the 11 million shares of common stock, 5 million shares were offered directly by the Company and 6 million shares were offered in connection with forward sale agreements (the "Forward Sale Agreements") described below. The Offering closed on July 25, 2017.

In connection with the Offering, the Company entered into separate Forward Sale Agreements with Morgan Stanley & Co. LLC and JPMorgan Chase Bank, National Association, London Branch (the "Forward Counterparties") pursuant to which the Company has agreed to sell, and each Forward Counterparty agreed to purchase, 3 million shares of the Company’s common stock (or 6 million shares of the Company common stock in the aggregate) subject to the terms and conditions of the Forward Sale Agreements, including the Company’s right to elect cash settlement or net share settlement. The initial forward price under each of the Forward Sale Agreements is $58.08 per share (which is the public offering price of our common stock, less the underwriting discount) and is subject to certain adjustments pursuant to the terms of the Forward Sale Agreements. Settlement of each of the Forward Sale Agreements is expected to occur no later than approximately one year after the closing of the Offering but may occur earlier at the option of the Company or, in certain circumstances described in the Forward Sale Agreements, at the option of the relevant Forward Counterparty. A Forward Counterparty’s decision to exercise its right to accelerate the Forward Sale Agreements entered into with it and to require the Company to settle the Forward Sale Agreements will be made irrespective of the Company’s interests, including the Company’s need for capital. The Company could be required to issue and deliver the Company’s common stock under the terms of the physical settlement provisions of the Forward Sale Agreements irrespective of the Company’s capital needs, which would result in dilution to the Company’s earnings per share and return on equity. The Forward Sales Agreements will be accounted for as equity instruments with subsequent changes in fair value not recognized as long as the contracts continue to be classified as equity.

In addition, in connection with the Offering, the Company entered into Amendment No. 1 (the “Revolving Loan Credit Amendment”) to the Company’s Second Amended and Restated Revolving Loan Credit Agreement, dated as of October 30, 2015 (as previously amended, amended and restated, supplemented or otherwise modified, the “Existing Credit Agreement”), by and among the Company and certain subsidiaries signatory thereto, Morgan Stanley Senior Funding, Inc., as agent, and the Lenders party thereto, pursuant to which the Existing Credit Agreement was amended to permit certain transactions, including the transactions contemplated by the Forward Sale Agreements.

The Company received proceeds of $290.4 million from the sale of 5 million shares of common stock in the Offering. The Company did not initially receive any proceeds from the sale of shares of its common stock by the Forward Counterparties pursuant to the Forward Sale Agreements. The Company expects to use the net proceeds of the shares issued and sold by the Company in the Offering and any net proceeds received upon the settlement of the Forward Sale Agreements for general corporate purposes, which may include strategic acquisitions and the repayment or refinancing of outstanding indebtedness.

In July 2017, the Company issued a notice of redemption for all of its outstanding 7.25% senior notes due January 2018 (the “Notes”). The redemption will occur on August 25, 2017. The redemption price is equal to the sum of the present values of the remaining scheduled payments of principal and interest on the Notes (not including any interest accrued as of the date of the redemption), discounted to the redemption date on a semi-annual basis at a pre-defined treasury rate plus 50 basis points, plus accrued and unpaid interest on the Notes to the redemption date. The redemption will be funded using cash on hand at the date of the redemption.