Condensed Consolidated Statement Of Shareholders' Equity (Parenthetical) - $ / shares	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Series A Preferred Stock [Member]
Preferred stock dividend declared, price per share	$ 0.86	$ 2.00
Series F Preferred Stock [Member]
Preferred stock dividend declared, price per share	$ 0.67	0.28
Series D Preferred Stock [Member]
Preferred stock dividend declared, price per share		$ 0.10