Segment Reporting (Tables)

9 Months Ended

Sep. 30, 2012

Segment Reporting Information [Line Items]

Schedule Of Underwriting Results For Operating Segments To Income (Loss) Before Taxes

	Three Months Ended						Nine Months Ended
	September 30,						September 30,
(Dollars in thousands)	2012			2011			2012			2011
Underwriting gain (loss)	$	67,833		$	7,213		$	134,571		$	(193,438	)
Net investment income		76,342			78,325			231,790			249,916
Net realized capital gains (losses)		95,943			(179,036	)		354,673			(206,744	)
Corporate expense		(2,019	)		(1,143	)		(5,317	)		(3,498	)
Interest, fee and bond issue cost amortization expense		(12,682	)		(12,706	)		(38,061	)		(38,083	)
Other income (expense)		425			(8,865	)		19,599			(20,401	)
Income (loss) before taxes	$	225,842		$	(116,212	)	$	697,255		$	(212,248	)

Schedule Of Gross Written Premium Derived From Largest Non-U.S. Market

	Three Months Ended				Nine Months Ended
	September 30,				September 30,
(Dollars in thousands)	2012		2011		2012		2011
Canada	$	33,891	$	73,543	$	109,166	$	156,727

U.S. Reinsurance [Member]

Segment Reporting Information [Line Items]

Schedule Of Underwriting Results For Operating Segments

	Three Months Ended				Nine Months Ended
U.S. Reinsurance	September 30,				September 30,
(Dollars in thousands)	2012		2011		2012		2011
Gross written premiums	$	433,494	$	360,833	$	938,444	$	947,155
Net written premiums		219,884		167,469		475,271		486,032
Premiums earned	$	181,396	$	167,530	$	529,409	$	512,104
Incurred losses and LAE		108,153		97,197		321,397		371,638
Commission and brokerage		40,092		23,298		139,920		106,123
Other underwriting expenses		12,766		10,843		33,541		30,621
Underwriting gain (loss)	$	20,385	$	36,192	$	34,551	$	3,722

International [Member]

Segment Reporting Information [Line Items]

Schedule Of Underwriting Results For Operating Segments

	Three Months Ended				Nine Months Ended
International	September 30,				September 30,
(Dollars in thousands)	2012		2011		2012		2011
Gross written premiums	$	248,459	$	326,053	$	878,637	$	923,649
Net written premiums		105,550		158,038		402,078		457,663
Premiums earned	$	121,611	$	151,050	$	426,419	$	479,989
Incurred losses and LAE		29,309		104,570		191,837		514,260
Commission and brokerage		19,692		35,686		88,432		105,755
Other underwriting expenses		8,246		7,549		21,532		20,938
Underwriting gain (loss)	$	64,364	$	3,245	$	124,618	$	(160,964	)

Insurance [Member]

Segment Reporting Information [Line Items]

Schedule Of Underwriting Results For Operating Segments

	Three Months Ended						Nine Months Ended
Insurance	September 30,						September 30,
(Dollars in thousands)	2012			2011			2012			2011
Gross written premiums	$	328,930		$	236,294		$	783,872		$	750,283
Net written premiums		133,432			114,328			348,328			366,223
Premiums earned	$	124,105		$	124,282		$	343,465		$	362,212
Incurred losses and LAE		105,415			120,332			273,617			302,038
Commission and brokerage		10,680			11,858			22,968			27,781
Other underwriting expenses		24,926			24,316			71,478			68,589
Underwriting gain (loss)	$	(16,916	)	$	(32,224	)	$	(24,598	)	$	(36,196	)