Consolidated Balance Sheets (Parenthetical) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020
Preferred stock, par value (in dollars per share)	$ 0.01	$ 0.01
Preferred stock, shares authorized (in shares)	100,000,000	100,000,000
Common stock, par value (in dollars per share)	$ 0.01	$ 0.01
Common stock, shares authorized (in shares)	500,000,000	500,000,000
Common stock, shares issued (in shares)	106,337,724	105,708,787
Common stock, shares outstanding (in shares)	106,337,724	105,708,787
6.45% Series D Preferred Stock
Preferred stock, shares issued (in shares)		3,000,000
Preferred stock, shares outstanding (in shares)		3,000,000
Preferred stock, aggregate liquidation preference (in dollars)		$ 75,417
Preferred stock, dividend rate		6.45%
6.25% Series E Preferred Stock
Preferred stock, shares authorized (in shares)	6,400,000
Preferred stock, shares issued (in shares)	6,400,000	6,400,000
Preferred stock, shares outstanding (in shares)	6,400,000	6,400,000
Preferred stock, aggregate liquidation preference (in dollars)	$ 160,861	$ 160,861
Preferred stock, dividend rate	6.25%	6.25%
5.875% Series F Preferred Stock
Preferred stock, shares authorized (in shares)	4,000,000
Preferred stock, shares issued (in shares)	4,000,000
Preferred stock, shares outstanding (in shares)	4,000,000
Preferred stock, aggregate liquidation preference (in dollars)	$ 100,506
Preferred stock, dividend rate	5.875%