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CONSOLIDATED STATEMENTS OF CHANGES IN STOCKHOLDERS' EQUITY (Parenthetical) - $ / shares					3 Months Ended		12 Months Ended
	Mar. 12, 2021	Feb. 19, 2021	Feb. 28, 2020	Apr. 15, 2013	Mar. 31, 2021	Mar. 31, 2020	Dec. 31, 2020
Common stock, cash dividends declared (in dollars per share)					$ 0.075
Series C Preferred Stock
Preferred Stock, dividend rate					6.50%		6.50%
Common stock, cash dividends declared (in dollars per share)	$ 0.075
Dividend declared per share, preferred stock (in dollars per share)		$ 0.40625			$ 0.40625
Series B Preferred Stock
Preferred Stock, dividend rate					7.50%		7.50%
Dividend declared per share, preferred stock (in dollars per share)		$ 0.46875			$ 0.46875
Preferred Stock | Series C Preferred Stock
Preferred Stock, dividend rate			6.50%		6.50%	6.50%
Preferred Stock, liquidation preference per share (in dollars per share)			$ 25.00		$ 25.00	$ 25.00
Preferred Stock | Series B Preferred Stock
Preferred Stock, dividend rate				7.50%	7.50%	7.50%
Preferred Stock, liquidation preference per share (in dollars per share)				$ 25.00	$ 25.00	$ 25.00

X

- Definition

Aggregate dividends declared during the period for each share of common stock outstanding.

+ References

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 505
-SubTopic 10
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+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 235
-SubTopic 10
-Section S99
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