Share-Based Compensation - Restricted shares (Details) - Restricted Stock - USD ($) $ / shares in Units, $ in Millions	12 Months Ended
	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023
Restricted shares outstanding
Outstanding at the beginning of the period (in shares))	200,000
Granted (in shares)	234,832	96,368	103,465
Vested (in shares)	(82,000)
Forfeited (in shares)	(33,000)
Outstanding at the end of the period (in shares)	320,000	200,000
Weighted-Average Grant-Date Fair Value
Outstanding at the beginning of the period (in dollars per share)	$ 117.2
Granted (in dollars per share)	42.87
Vested (in dollars per share)	114.82
Forfeited (in dollars per share)	82.52
Outstanding at the end of the period (in dollars per share)	$ 66.76	$ 117.2
Aggregate value at grant date	$ 10.1	$ 8.0	$ 16.6
Fair value of vested shares	9.4	$ 8.9	$ 8.4
Total future compensation cost related to unvested awards	$ 13.0
Recognition period	2 years 2 months 26 days
Maximum
Share-Based Compensation
Vesting period	4 years