CONSOLIDATED STATEMENTS OF CHANGES IN EQUITY (Parenthetical) - $ / shares	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Common stock, per share	$ 0.94	$ 0.74	$ 0.60
Preferred stock, Series H
Preferred stock, per share	1,275.00	1,275.00	1,275.00
Preferred stock Series I
Preferred stock, per share	1,656.24	1,656.24	1,656.24
Preferred stock, Series J
Preferred stock, per share	1,559.42	$ 1,225.00	$ 1,225.00
Preferred Stock, Series C
Preferred stock, per share	30.00
Class B Preferred stock, Series A
Preferred stock, per share	20.83
Preferred Stock, Series K
Preferred stock, per share	$ 357.50