Related Party Transactions (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
ABS [Member]
Related Party [Abstract]
Related party expenses	$ 1.4	$ 1.5	$ 1.3
UK Protection & Indemnity Association [Member]
Related Party [Abstract]
Related party expenses	3.6	3.6	3.4
Signal Member
Related Party [Abstract]
Related party expenses	0.6	0.7	0.5
Clark Hill PLC Member
Related Party [Abstract]
Legal services	2.6	0.9	1.0
W. Sean O'Neil Attorney Member
Related Party [Abstract]
Legal services	$ 0.2	$ 0.1	$ 0.1