Consolidated Statements of Equity (Parenthetical) - $ / shares	3 Months Ended
	Sep. 30, 2021	Jun. 30, 2021	Mar. 31, 2021	Sep. 30, 2020	Jun. 30, 2020	Mar. 31, 2020
Common dividends paid (in usd per share)	$ 0.075	$ 0.075	$ 0.075	$ 0.075	$ 0.075	$ 0.075
Series A Preferred Stock
Preferred dividends paid, per share amount (in usd per share)	0.34375	0.34375	0.34375	0.35313	0.34375	0.68750
Series D Preferred Stock
Preferred dividends paid, per share amount (in usd per share)	$ 0.35313	$ 0.35313	$ 0.35313	$ 0.34375	$ 0.35313	$ 0.588542