CONSOLIDATED STATEMENTS OF OPERATIONS AND COMPREHENSIVE INCOME (USD $) In Millions, except Per Share data, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Revenues
Gross insurance and reinsurance premiums written	$ 114.5	$ 127.7	$ 618.4	$ 640.9
Ceded reinsurance premiums	(13.0)	(26.2)	(93.1)	(108.6)
Net insurance and reinsurance premiums written	101.5	101.5	525.3	532.3
Change in net unearned insurance and reinsurance premiums	51.5	51.5	(73.7)	(72.4)
Net insurance and reinsurance premiums earned	153.0	153.0	451.6	459.9
Net investment income	16.7	15.5	49.8	50.3
Net realized and unrealized investment gains (losses)	4.6	33.2	(57.3)	78.9
Net foreign currency losses	(22.3)	(10.8)	(6.5)	(10.5)
Net income (loss) from derivative instruments	(6.7)	0.7	(14.3)	4.3
Other revenue		0.1		0.8
Total revenues	145.3	191.7	423.3	583.7
Underwriting expenses:
Loss and loss adjustment expenses	26.8	57.3	124.2	158.5
Insurance and reinsurance acquisition costs	24.5	23.5	69.2	71.9
General and administrative expenses	31.3	30.5	84.6	87.2
Non-underwriting expenses:
Interest and other financing expenses	4.7	4.7	14.1	14.5
Total expenses	87.3	116.0	292.1	332.1
Income before income taxes	58.0	75.7	131.2	251.6
Income tax benefit (provision)	(0.1)	(0.7)	0.1	(0.7)
Net income	57.9	75.0	131.3	250.9
Net income attributable to non-controlling interest	(1.6)		(3.5)
Net income available to the Company	56.3	75.0	127.8	250.9
Dividends declared on Preferred Shares	(3.3)	(3.3)	(10.0)	(10.0)
Net income available to the Company's common shareholders	53.0	71.7	117.8	240.9
Net income	57.9	75.0	131.3	250.9
Net change in foreign currency translation	3.1	1.7	(0.1)	0.5
Comprehensive income	61.0	76.7	131.2	251.4
Net income attributable to non-controlling interest	(1.6)		(3.5)
Comprehensive income available to the Company	$ 59.4	$ 76.7	$ 127.7	$ 251.4
Per share data:
Basic and diluted earnings per Common Share (in dollars per share)	$ 1.02	$ 1.25	$ 2.20	$ 4.08
Dividends declared per Common Share (in dollars per share)	$ 0.115	$ 0.105	$ 0.345	$ 0.315