Consolidated Statements Of Changes In Shareholders' Equity (Unaudited) (Parenthetical) - $ / shares	1 Months Ended			3 Months Ended		9 Months Ended
	Jul. 31, 2021	Apr. 30, 2021	Jan. 31, 2021	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Cash dividends declared on common stock (usd per share)	$ 0.31	$ 0.31	$ 0.31	$ 0.31	$ 0.28	$ 0.93	$ 0.84
Series D Preferred Stock
Dividends on preferred stock (usd per share)				0.41	0.41	1.23	1.23
Series E Preferred Stock
Dividends on preferred stock (usd per share)				$ 429.69	$ 716.15	$ 1,289.07	$ 716.15