Shareholders' Equity - Preferred Stock Issued and Outstanding (Details) - USD ($) $ in Thousands	3 Months Ended		10 Months Ended	12 Months Ended
	Mar. 31, 2022	Dec. 31, 2021	Dec. 31, 2021	Dec. 31, 2021
Class of Stock [Line Items]
Preferred stock, issued (in shares)	10,600,000	10,600,000	10,600,000	10,600,000
Preferred stock, outstanding (in shares)	10,600,000	10,600,000	10,600,000	10,600,000
Preferred stock, carrying value (in dollars)	$ 850,000	$ 850,000	$ 850,000	$ 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	10,000,000
Preferred stock, outstanding (in shares)	10,000,000	10,000,000	10,000,000	10,000,000
Preferred stock, carrying value (in dollars)	$ 250,000	$ 250,000	$ 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, basis spread	3.65%
Series B Preferred Stock
Class of Stock [Line Items]
Preferred stock, issued (in shares)	300,000	300,000	300,000	300,000
Preferred stock, outstanding (in shares)	300,000	300,000	300,000	300,000
Preferred stock, carrying value (in dollars)	$ 300,000	$ 300,000	$ 300,000	$ 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%
Series C Preferred Stock
Class of Stock [Line Items]
Preferred stock, issued (in shares)	300,000	300,000	300,000	300,000
Preferred stock, outstanding (in shares)	300,000	300,000	300,000	300,000
Preferred stock, carrying value (in dollars)	$ 300,000	$ 300,000	$ 300,000	$ 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%