Related Party Transactions (Details) - USD ($)	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
ABS [Member]
Related Party [Abstract]
Related party expenses	$ 1,300,000	$ 1,600,000	$ 2,400,000
UK Protection & Indemnity Association [Member]
Related Party [Abstract]
Related party expenses	3,400,000	3,200,000	3,000,000.0
Signal [Member]
Related Party [Abstract]
Related party expenses	800,000	600,000	700,000
Strasburger & Price, LLP [Member]
Related Party [Abstract]
Legal services	$ 1,000,000.0	$ 2,900,000	1,600,000
W. Sean O'Neil Attorney [Member]
Related Party [Abstract]
Legal services			$ 135,000