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Condensed Consolidated Statements of Equity/Capital (Parenthetical) - shares | 6 Months Ended
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Jun. 30, 2017 | Jun. 30, 2016
Statement of Stockholders' Equity [Abstract] |  |
Issuances of common and restricted stock, shares | 336,475 | 327,326
Cancellation of restricted common stock/units, shares | 34,478 | 28,407

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