CONSOLIDATED STATEMENTS OF CHANGES IN EQUITY (UNAUDITED) (Parentheticals) - $ / shares	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Statement Of Stockholders Equity [Abstract]
Dividends and distributions, Per share and unit	$ 0.095	$ 0.095	$ 0.285	$ 0.285