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Consolidated Statements of Changes in Shareholders' Equity - Unaudited (Parenthetical) - $ / shares	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Special dividend (shares)	0.15389
Series C Preferred Stock
Preferred stock, dividends, per share, cash paid (usd per share)	$ 0.34478125	$ 0.4375
Series D Preferred Stock
Preferred stock, dividends, per share, cash paid (usd per share)	0.40625	0.40625
Series E Preferred Stock
Preferred stock, dividends, per share, cash paid (usd per share)	0.403125	0.403125
Series F Preferred Stock
Preferred stock, dividends, per share, cash paid (usd per share)	$ 0.375	$ 0.375

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