Commitments and Contingencies - Preferred Dividend Arrearages (Details) - USD ($) $ / shares in Units, $ in Millions	3 Months Ended
	Mar. 31, 2022	Dec. 31, 2021
Other Commitments [Line Items]
Preferred shares, authorized (in shares)	25,000,000.0
Cumulative amount of unpaid dividends on preferred stock	$ 47.9
Series B Preferred Stock
Other Commitments [Line Items]
Preferred shares, authorized (in shares)	25,000,000	25,000,000
Preferred stock annual dividend rate	$ 1.8436
Unpaid dividends per share on preferred stock	$ 3.23
Series C Preferred Stock
Other Commitments [Line Items]
Preferred shares, authorized (in shares)	25,000,000	25,000,000
Preferred stock annual dividend rate	$ 1.80
Unpaid dividends per share on preferred stock	$ 3.15
Series D Preferred Stock
Other Commitments [Line Items]
Preferred shares, authorized (in shares)	25,000,000	25,000,000
Preferred stock annual dividend rate	$ 1.7188
Unpaid dividends per share on preferred stock	$ 3.01