Shareholders' Equity (Schedule of Dividends) (Details) - $ / shares	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Class Of Stock [Line Items]
Common stock		$ 0.066	$ 0.066	$ 0.132
Series B Preferred Stock [Member]
Class Of Stock [Line Items]
Cumulative Redeemable Preferred Stock	$ 0.453	$ 0.453	$ 0.906	$ 0.906
Dividend rate percentage	7.25%	7.25%	7.25%	7.25%
Series C Preferred Stock [Member]
Class Of Stock [Line Items]
Cumulative Redeemable Preferred Stock	$ 0.406	$ 0.406	$ 0.813	$ 0.813
Dividend rate percentage	6.50%	6.50%	6.50%	6.50%