Consolidated Statements of Equity (Parenthetical) - shares |
12 Months Ended | |||
|---|---|---|---|---|
Dec. 31, 2018 |
Dec. 31, 2017 |
Dec. 31, 2016 |
Dec. 31, 2015 |
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| Balance (in units/ shares) | 110,241,868 | 101,292,299 | 98,498,651 | 94,531,512 |
| Conversion of common units to common shares (in shares/units) | 1,904,615 | 339,513 | 87,000 | |
| Exercise of share options (in units/shares) | 5,000 | |||
| Restricted common units/shares net of redemptions | 146,290 | 179,180 | 158,912 | |
| Forward Equity Sale Agreement [Member] | ||||
| Shares issued to the public (in units/shares) | 5,907,000 | 1,678,913 | ||
| Common Stock Issued to Public Under At-the-Market Program [Member] | ||||
| Shares issued to the public (in units/shares) | 991,664 | 591,042 | 3,721,227 | |
| X | ||||||||||
- Definition Number of shares of common stock outstanding. Common stock represent the ownership interest in a corporation. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- Definition The number of shares issued during the period upon the conversion of units. An example of a convertible unit is an umbrella partnership real estate investment trust unit (UPREIT unit). Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- Definition Number of new stock issued during the period. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- Definition Number of shares (or other type of equity) issued during the period as a result of any equity-based compensation plan other than an employee stock ownership plan (ESOP), net of any shares forfeited. Shares issued could result from the issuance of restricted stock, the exercise of stock options, stock issued under employee stock purchase plans, and/or other employee benefit plans. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- Definition Number of share options (or share units) exercised during the current period. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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