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Consolidated Statements of Changes in Shareholders' Equity - Unaudited (Parenthetical) - $ / shares	3 Months Ended	9 Months Ended
	Sep. 30, 2021	Sep. 30, 2021
Series C Preferred Stock
Preferred stock, dividends, per share, cash paid (usd per share)	$ 0.346206	$ 1.041346
Series D Preferred Stock
Preferred stock, dividends, per share, cash paid (usd per share)	0.332790	1.075982
Series E Preferred Stock
Preferred stock, dividends, per share, cash paid (usd per share)	0.335984	1.142234
Series F Preferred Stock
Preferred stock, dividends, per share, cash paid (usd per share)	$ 0.375	$ 1.125

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