Condensed Consolidated Statements of Income (Loss) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Premiums and other revenue:
Earned premiums	$ 454.3	$ 470.3	$ 934.9	$ 936.4
Net investment income	29.3	52.7	67.0	97.1
Net investment and other gains (losses):
Net realized investment and other gains (losses)	(36.9)	4.0	(77.0)	2.7
Change in fair value recognized	(3.0)	20.3	3.7	35.8
Change in allowance for credit losses on fixed maturity securities	(0.5)	0.4	(1.6)	(0.7)
Total net investment and other gains (losses)	(40.4)	24.7	(74.9)	37.8
Total revenue	443.2	547.7	927.0	1,071.3
Expenses:
Losses and loss adjustment expenses	276.0	271.6	559.6	579.2
Underwriting, acquisition and insurance expenses	161.0	177.3	333.9	353.7
Non-operating expenses	15.6	10.8	23.0	12.7
Interest expense	6.1	5.7	11.9	10.8
Fee and other (income) expense, net	(1.1)	(0.8)	(1.9)	(0.7)
Foreign currency exchange (gains) losses	(10.3)	4.4	(7.4)	5.7
Total expenses	447.3	469.0	919.1	961.4
Income before income taxes	(4.1)	78.7	7.9	109.9
Income tax provision	12.1	8.9	25.1	10.3
Net income (loss)	(16.2)	69.8	(17.2)	99.6
Dividends on preferred shares	2.7	2.7	5.3	5.3
Net Loss attributable to common shareholders, diluted	(18.9)	67.1	(22.5)	94.3
Net Loss attributable to common shareholders, basic	$ (18.9)	$ 67.1	$ (22.5)	$ 94.3
Net income (loss) attributable to common shareholders per common share:
Basic (in dollars per share)	$ (0.54)	$ 1.93	$ (0.64)	$ 2.72
Diluted (in dollars per share)	(0.54)	1.92	(0.64)	2.70
Cash dividend declared - common shares (in dollars per share)	$ 0.31	$ 0.31	$ 0.62	$ 0.62
Weighted average common shares:
Basic (in shares)	34,964,773	34,820,649	34,928,555	34,766,948
Diluted (in shares)	34,964,773	35,012,780	34,928,555	34,983,804