Condensed Consolidated Statements of Income (Loss) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Premiums and other revenue:
Net earned premiums	$ 313.7	$ 389.9
Net investment income	58.8	29.7
Net investment and other gains (losses):
Net realized investment and other gains (losses)	6.2	(21.1)
Change in fair value recognized	0.0	3.3
Change in allowance for credit losses on fixed maturity securities	0.0	(0.1)
Total net investment and other gains (losses)	6.2	(17.9)
Total revenue	378.7	401.7
Expenses:
Losses and loss adjustment expenses	220.0	284.6
Underwriting, acquisition and general expenses	117.1	137.0
Non-operating expenses	7.7	11.6
Interest expense	8.7	8.5
Fee and other (income) expense, net	0.0	(0.4)
Foreign currency exchange (gains) losses	(2.0)	2.7
Total expenses	351.5	444.0
Income (loss) before income taxes	27.2	(42.3)
Income tax provision (benefit)	1.6	(8.5)
Net income (loss)	25.6	(33.8)
Dividends on Series A Preferred stock	2.6	2.6
Net income (loss) attributable to common stockholders	23.0	(36.4)
Net income (loss) attributable to common stockholders	$ 23.0	$ (36.4)
Net income (loss) attributable to common stockholders per share of common stock:
Basic (in dollars per share)		$ (1.04)
Diluted (in dollars per share)		(1.04)
Dividend declared per common share (in dollars per share)		$ 0
Weighted average common stock:
Basic (in shares)		35,099,968
Diluted (in shares)		35,099,968