Net Income (Loss) Per Unrestricted Share - Reconciliation of Numerator and Denominator Used in Calculation (Details) - USD ($) $ / shares in Units, $ in Millions	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Earnings Per Share [Abstract]
Net Income (Loss)	$ 71.3	$ (80.1)
Weighted-Average Unrestricted Shares Outstanding (in shares)	64,254,500	63,946,600
Equity-based Compensation Equivalent Shares (in shares)	518,300	0
Weighted-Average Unrestricted Shares and Equivalent Shares Outstanding Assuming Dilution (in shares)	64,772,800	63,946,600
Basic (in dollars per share)	$ 1.11	$ (1.25)
Diluted (in dollars per share)	$ 1.10	$ (1.25)