Subsequent Events (Narrative) (Details) - USD ($) $ / shares in Units, $ in Thousands					12 Months Ended
	Feb. 04, 2022	Jan. 12, 2022	Aug. 31, 2020	Aug. 10, 2020	Dec. 31, 2021	Dec. 31, 2020
Subsequent Event [Line Items]
Preferred stock redeemed, value						$ 10,485
Subsequent Event [Member]
Subsequent Event [Line Items]
Date declared		Jan. 12, 2022
Dividends per common share		$ 0.16
Date of record		Feb. 01, 2022
Date paid		Feb. 15, 2022
Series F Preferred Stock [Member]
Subsequent Event [Line Items]
Preferred stock redeemed, shares			6,465
Preferred stock, dividend rate			6.00%			6.00%
Preferred stock, redemption price			$ 1,000
Preferred stock redeemed, value			$ 6,500
Series C Preferred Stock [Member]
Subsequent Event [Line Items]
Preferred stock redeemed, shares				388
Preferred stock, dividend rate				6.00%		6.00%
Preferred stock, redemption price				$ 10,000
Preferred stock redeemed, value				$ 3,900
Series G Preferred Stock [Member]
Subsequent Event [Line Items]
Preferred stock, dividend rate					6.00%	6.00%
Series G Preferred Stock [Member] | Subsequent Event [Member]
Subsequent Event [Line Items]
Preferred stock redeemed, shares	533
Preferred stock, dividend rate	6.00%
Preferred stock, redemption price	$ 10,000
Preferred stock redeemed, value	$ 5,300