CONSOLIDATED STATEMENTS OF CHANGES IN EQUITY (Parenthetical) - $ / shares	3 Months Ended		9 Months Ended		12 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019	Dec. 31, 2019
Common stock dividend (in dollars per share)	$ 0	$ 0	$ 0.09	$ 0.09
Preferred stock dividend (in dollars per share)	$ 0.51
Accounting Standards Update [Extensible List]					us-gaap:AccountingStandardsUpdate201613Member
Series B Preferred Stock
Preferred stock dividend (in dollars per share)		$ 1.04	$ 2.00	$ 3.24