Stockholders' Equity (Dividends) (Details) - USD ($) $ / shares in Units, $ in Thousands		1 Months Ended		3 Months Ended
		Apr. 30, 2022	Oct. 31, 2021	Mar. 31, 2022	Mar. 31, 2021
Class of Stock [Line Items]
Preferred stock dividends				$ 0	$ 4,485
Common stock dividends				$ 92,751	$ 90,848
Common stock dividends per share (in dollars per share)				$ 0.5300	$ 0.5200
Common stock dividends declared (in dollars per share)				$ 0.5300	$ 0.5200
Subsequent event
Class of Stock [Line Items]
Common stock dividends declared (in dollars per share)		$ 0.5300
Series F Preferred Stock
Class of Stock [Line Items]
Preferred stock dividends	[1]				$ 4,485
Preferred stock dividends per depositary share (in dollars per share)	[1]				$ 0.3250
Dividend rate			5.20%

[1] (1) The Series F preferred stock was redeemed in October 2021.