Segment Information (Tables)

9 Months Ended

Sep. 30, 2013

Segment Reporting [Abstract]

Revenue and (Loss) Income Before Income Taxes for Each Segment

Revenue and income (loss) before income taxes for each segment for the three and nine months ended September 30, 2013 and 2012 were as follows:

	For the Three Months Ended September 30,						For the Nine Months Ended September 30,
(in millions)	2013			2012			2013			2012
Revenue:
Earned premiums
Excess and Surplus Lines	$	120.6		$	100.8		$	334.4		$	295.5
Commercial Specialty		74.6			78.6			225.1			241.8
International Specialty		37.5			33.4			106.6			90.8
Syndicate 1200		97.3			90.8			295.6			242.3
Run-off Lines		0.5			0.7			0.5			1.4
Total earned premiums		330.5			304.3			962.2			871.8
Net investment income
Excess and Surplus Lines		10.2			12.5			32.3			38.5
Commercial Specialty		5.6			6.7			17.6			20.6
International Specialty		2.4			3.1			6.4			10.0
Syndicate 1200		2.5			3.8			8.1			11.4
Run-off Lines		2.6			2.8			8.2			9.8
Corporate and Other		0.8			0.0			4.7			0.0
Total net investment income		24.1			28.9			77.3			90.3
Fee income, net		0.3			3.0			0.5			4.8
Net realized investment gains		9.1			8.3			29.6			18.7
Total revenue	$	364.0		$	344.5		$	1,069.6		$	985.6
	For the Three Months Ended September 30,						For the Nine Months Ended September 30,
(in millions)	2013			2012			2013			2012
Income (loss) before income taxes
Excess and Surplus Lines	$	29.6		$	15.1		$	60.2		$	56.3
Commercial Specialty		10.1			(2.7	)		17.3			(11.8	)
International Specialty		0.5			6.6			8.1			22.0
Syndicate 1200		8.5			11.8			26.7			18.0
Run-off Lines		(9.1	)		(2.5	)		(5.8	)		(1.5	)
Total segment income before taxes		39.6			28.3			106.5			83.0
Corporate and Other		(15.8	)		(18.9	)		(22.9	)		(30.9	)
Net realized investment gains		9.1			8.3			29.6			18.7
Total income before income taxes	$	32.9		$	17.7		$	113.2		$	70.8

Schedule of Earned Premiums by Geographic Location

The table below presents earned premiums by geographic location for the three and nine months ended September 30, 2013 and 2012. For this disclosure, we determine geographic location by the country of domicile of our subsidiaries that write the business and not by the location of insureds or reinsureds from whom the business was generated.

	For the Three Months Ended September 30,				For the Nine Months Ended September 30,
(in millions)	2013		2012		2013		2012
Bermuda	$	27.4	$	32.6	$	75.3	$	83.5
Brazil		9.9		6.7		29.9		18.4
Malta		0.5		0.0		1.3		0.1
United Kingdom		97.7		84.9		296.0		231.1
United States		195.0		180.1		559.7		538.7
Total earned premiums	$	330.5	$	304.3	$	962.2	$	871.8

Identifiable Assets

The following table represents identifiable assets as of September 30, 2013 and December 31, 2012:

(in millions)	September 30, 2013		December 31, 2012
Excess and Surplus Lines	$	2,248.6	$	2,206.7
Commercial Specialty		1,316.5		1,337.7
International Specialty		785.9		731.8
Syndicate 1200		1,670.5		1,811.4
Run-off Lines		558.0		516.5
Corporate and Other		71.1		84.8
Total	$	6,650.6	$	6,688.9