Consolidated Statements of Equity (Parenthetical) - $ / shares	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Consolidated Statements of Equity [Abstract]
Dividends and distributions declared: Common stock, per share	$ 0.195	$ 0.195
Dividends and distributions declared: Common units, per unit	$ 0.00375