Shareholders' Equity - Preferred Stock Issued and Outstanding (Details) - USD ($) $ in Thousands			1 Months Ended	12 Months Ended
	Mar. 02, 2021	Mar. 05, 2019	Oct. 31, 2021	Dec. 31, 2021	Dec. 31, 2020
Class of Stock [Line Items]
Preferred stock, issued (in shares)				10,600,000
Preferred stock, outstanding (in shares)				10,600,000
Preferred stock, aggregate liquidation preference (in dollars)				$ 850,000
Series A Preferred Stock
Class of Stock [Line Items]
Preferred stock, issued (in shares)		10,000,000		10,000,000	10,000,000
Preferred stock, outstanding (in shares)				10,000,000	10,000,000
Preferred stock, aggregate liquidation preference (in dollars)				$ 250,000	$ 250,000
Preferred stock, dividend rate		6.15%		6.15%
Series A Preferred Stock | LIBOR
Class of Stock [Line Items]
Preferred stock, dividend rate		3.65%
Preferred stock, dividend rate, basis spread				3.65%
Series B Preferred Stock
Class of Stock [Line Items]
Preferred stock, issued (in shares)	300,000			300,000
Preferred stock, outstanding (in shares)				300,000
Preferred stock, aggregate liquidation preference (in dollars)				$ 300,000
Preferred stock, dividend rate	4.65%			4.65%
Series B Preferred Stock | US Treasury (UST) Interest Rate
Class of Stock [Line Items]
Preferred stock, dividend rate, basis spread	4.076%			4.076%
Series C Preferred Stock
Class of Stock [Line Items]
Preferred stock, issued (in shares)			300,000	300,000
Preferred stock, outstanding (in shares)				300,000
Preferred stock, aggregate liquidation preference (in dollars)				$ 300,000
Preferred stock, dividend rate			4.125%	4.125%
Series C Preferred Stock | US Treasury (UST) Interest Rate
Class of Stock [Line Items]
Preferred stock, dividend rate, basis spread			3.149%	3.149%