Consolidated Balance Sheets (Parenthetical) - $ / shares	Jun. 30, 2017	Dec. 31, 2016
Common stock, par value (in dollars per share)	$ 0.01	$ 0.01
Common stock, shares authorized (in shares)	500,000,000	500,000,000
Common stock, shares issued (in shares)	157,677,566	135,966,013
Common stock, shares outstanding (in shares)	157,677,566	135,966,013
Operating Partnership
General partners' capital account, units issued (in units)	157,677,566	135,966,013
General partners' capital account, units outstanding (in units)	157,677,566	135,966,013
Limited partners' capital account, units issued (in units)	5,399,265	3,436,207
Limited partners' capital account, units outstanding (in units)	5,399,265	3,436,207

Face amount or stated value per share of common stock.

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Total number of common shares of an entity that have been sold or granted to shareholders (includes common shares that were issued, repurchased and remain in the treasury). These shares represent capital invested by the firm's shareholders and owners, and may be all or only a portion of the number of shares authorized. Shares issued include shares outstanding and shares held in the treasury.

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Number of shares of common stock outstanding. Common stock represent the ownership interest in a corporation.

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Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
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The number of general partner units issued.

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The number of general partner units outstanding.

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The number of limited partner units issued.

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Reference 1: http://www.xbrl.org/2003/role/presentationRef
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The number of limited partner units outstanding.

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