CONSOLIDATED STATEMENTS OF EQUITY (Parenthetical)	6 Months Ended
	Jun. 30, 2018 $ / shares
Common Stock, Dividends, Per Share, Cash Paid	$ 0.42
Series B Preferred Stock [Member]
Preferred Stock, Dividends, Per Share, Cash Paid	0.9218
Series C Preferred Stock [Member]
Preferred Stock, Dividends, Per Share, Cash Paid	0.90
Series D Preferred Stock [Member]
Preferred Stock, Dividends, Per Share, Cash Paid	$ 0.8594