CONSOLIDATED STATEMENTS OF CHANGES IN OWNERS' EQUITY AND SERIES A PREFERRED STOCK (Unaudited) (Parenthetical) - $ / shares	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Statement Of Stockholders Equity [Abstract]
Preferred stock dividends, per share	$ 23.75	$ 23.75	$ 71.25	$ 71.25
Common stock dividends, per share	$ 0.10	$ 0.10	$ 0.30	$ 1.11