Condensed Consolidated Statements of Equity/Capital (Parenthetical) - shares	9 Months Ended
	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