CONSOLIDATED STATEMENTS OF CHANGES IN OWNERS' EQUITY AND SERIES A PREFERRED STOCK (Unaudited) (Parenthetical) - $ / shares	3 Months Ended		6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
Statement Of Stockholders Equity [Abstract]
Preferred stock dividends, per share	$ 23.75	$ 23.75	$ 47.5	$ 47.5
Common stock dividends, per share	$ 0.10	$ 0.10	$ 0.20	$ 1.01