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Condensed Consolidated Statements of Equity/Capital (Parenthetical) - shares | 9 Months Ended
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Sep. 30, 2017 | Sep. 30, 2016
Statement of Stockholders' Equity [Abstract] |  |
Issuances of common and restricted stock, shares (in shares) | 342,008 | 331,324
Cancellation of restricted common stock/units, shares (in shares) | 37,758 | 31,293

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