CONSOLIDATED STATEMENTS OF EQUITY (Parenthetical)	3 Months Ended
	Mar. 31, 2018 $ / shares
Common Stock, Dividends, Per Share, Cash Paid	$ 0.21
Series B Preferred Stock [Member]
Preferred Stock, Dividends, Per Share, Cash Paid	0.4609
Series C Preferred Stock [Member]
Preferred Stock, Dividends, Per Share, Cash Paid	0.45
Series D Preferred Stock [Member]
Preferred Stock, Dividends, Per Share, Cash Paid	$ 0.4297