CONSOLIDATED STATEMENTS OF CHANGES IN EQUITY (Parenthetical) - $ / shares	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Dividends	$ 0.12	$ 0	$ 0
Series A Preferred Stock
Preferred stock dividend rate (in dollars per share)			1.74
Series B Preferred Stock
Preferred stock dividend rate (in dollars per share)	$ 4.21	$ 3.91	$ 2.91