Condensed Consolidated Statements of Income (Loss) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Premiums and other revenue:
Earned premiums	$ 480.6	$ 466.1
Net investment income	37.7	44.4
Net realized investment and other gains (losses):
Net realized investment and other losses	(40.2)	(1.3)
Change in fair value recognized	6.7	15.5
Change in allowance for credit losses on fixed maturity securities	(1.0)	(1.1)
Total net realized investment and other gains (losses)	(34.5)	13.1
Total revenue	483.8	523.6
Expenses:
Losses and loss adjustment expenses	283.6	307.6
Underwriting, acquisition and insurance expenses	172.9	176.4
Non-operating expenses	7.4	1.9
Interest expense	5.8	5.1
Fee and other (income) expense, net	(0.8)	0.1
Foreign currency exchange losses	2.9	1.3
Total expenses	471.8	492.4
Income before income taxes	12.0	31.2
Income tax provision	13.0	1.4
Net income (loss)	(1.0)	29.8
Dividends on preferred shares	2.6	2.6
Net Loss attributable to common shareholders, diluted	(3.6)	27.2
Net Loss attributable to common shareholders, basic	$ (3.6)	$ 27.2
Net income (loss) attributable to common shareholders per common share:
Basic (in dollars per share)	$ (0.11)	$ 0.78
Diluted (in dollars per share)	(0.11)	0.78
Cash dividend declared - common shares (in dollars per share)	$ 0.31	$ 0.31
Weighted average common shares:
Basic (in shares)	34,891,935	34,712,650
Diluted (in shares)	34,891,935	34,938,013