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Stockholders' Equity - Cash Dividends Declared - Preferred Stock (Details) - $ / shares	Jun. 14, 2021	Mar. 15, 2021	Dec. 07, 2020	Sep. 14, 2020	Jun. 15, 2020
Series B Preferred Stock
Dividends Payable [Line Items]
Cash dividend per share (in dollars per share)	$ 0.484375	$ 0.484375	$ 0.484375	$ 0.484375	$ 0.968750
Series C Preferred Stock
Dividends Payable [Line Items]
Cash dividend per share (in dollars per share)	0.4921875	0.4921875	0.4921875	0.4921875	0.9843750
Series D Preferred Stock
Dividends Payable [Line Items]
Cash dividend per share (in dollars per share)	0.50	0.50	0.50	0.50	1.00
Series E Preferred Stock
Dividends Payable [Line Items]
Cash dividend per share (in dollars per share)	$ 0.4921875	$ 0.4921875	$ 0.4921875	$ 0.4921875	$ 0.9843750

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