Stock-Based Compensation Plans and Arrangements - Restricted Stock and Performance Stock Unit Activity (Details) - USD ($) $ / shares in Units, $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Weighted Average Grant Date Fair Value
Unrecognized compensation cost	$ 18.0
Weighted average period for total unrecognized compensation cost	1 year 4 months 24 days
Restricted Stock
Number of Shares
Beginning balance (in shares)	143,033
Granted (in shares)	54,098
Vested (in shares)	(143,033)
Canceled (in shares)	(4,918)
Ending balance (in shares)	49,180	143,033
Weighted Average Grant Date Fair Value
Beginning balance (in dollars per share)	$ 7.69
Granted (in dollars per share)	20.33
Vested (in dollars per share)	7.69
Canceled (in dollars per share)	20.33
Ending balance (in dollars per share)	$ 20.33	$ 7.69
Fair value of shares vested	$ 1.0	$ 1.0	$ 1.0
Unrecognized compensation cost	$ 0.4
Weighted average period for total unrecognized compensation cost	4 months 24 days
Restricted Stock Units And Performance Stock Units
Number of Shares
Beginning balance (in shares)	6,721,505
Granted (in shares)	1,673,427
Vested (in shares)	(2,944,877)
Canceled (in shares)	(141,559)
Ending balance (in shares)	5,308,496	6,721,505
Weighted Average Grant Date Fair Value
Beginning balance (in dollars per share)	$ 10.41
Granted (in dollars per share)	15.51
Vested (in dollars per share)	10.64
Canceled (in dollars per share)	12.85
Ending balance (in dollars per share)	$ 11.83	$ 10.41
Fair value of restricted stock units that vested and converted to common stock	$ 31.0	$ 26.0	$ 27.0
Unrecognized compensation cost	$ 15.0
Weighted average period for total unrecognized compensation cost	1 year 4 months 24 days