Segment Reporting (Tables)

6 Months Ended

Jun. 30, 2016

Segment Reporting [Abstract]

Schedule Of Underwriting Results For Operating Segments

Three Months Ended					Six Months Ended
U.S. Reinsurance	June 30,					June 30,
(Dollars in thousands)	2016		2015			2016		2015
Gross written premiums	$	405,530	$	451,059		$	942,236	$	1,013,706
Net written premiums		161,031		184,707			384,458		425,401
Premiums earned	$	224,618	$	235,426		$	459,861	$	490,838
Incurred losses and LAE		110,152		116,473			226,322		227,928
Commission and brokerage		50,130		34,703			99,861		93,067
Other underwriting expenses		12,133		11,807			25,591		23,336
Underwriting gain (loss)	$	52,203	$	72,443		$	108,087	$	146,507

	Three Months Ended				Six Months Ended
International	June 30,				June 30,
(Dollars in thousands)	2016		2015		2016		2015
Gross written premiums	$	348,178	$	311,653	$	586,656	$	645,268
Net written premiums		124,438		147,399		212,154		269,080
Premiums earned	$	131,285	$	157,922	$	244,458	$	298,621
Incurred losses and LAE		91,427		110,027		164,842		211,472
Commission and brokerage		26,140		31,243		52,250		65,242
Other underwriting expenses		7,969		8,049		15,792		16,164
Underwriting gain (loss)	$	5,749	$	8,603	$	11,574	$	5,743

	Three Months Ended						Six Months Ended
Insurance	June 30,						June 30,
(Dollars in thousands)	2016			2015			2016			2015
Gross written premiums	$	424,083		$	326,729		$	778,803		$	657,230
Net written premiums		155,786			140,358			308,712			286,410
Premiums earned	$	132,952		$	128,076		$	266,461		$	253,027
Incurred losses and LAE		136,957			96,379			243,434			192,359
Commission and brokerage		(4,144	)		7,007			(11,163	)		11,175
Other underwriting expenses		38,228			31,717			76,174			60,616
Underwriting gain (loss)	$	(38,089	)	$	(7,027	)	$	(41,984	)	$	(11,123	)

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

	Three Months Ended						Six Months Ended
	June 30,						June 30,
(Dollars in thousands)	2016			2015			2016			2015
Underwriting gain (loss)	$	19,863		$	74,019		$	77,677		$	141,127
Net investment income		73,872			70,925			132,317			143,506
Net realized capital gains (losses)		29,165			51,225			(37,212	)		72,521
Corporate expense		(2,010	)		(1,785	)		(4,346	)		(3,394	)
Interest, fee and bond issue cost amortization expense		(8,858	)		(8,858	)		(17,717	)		(17,717	)
Other income (expense)		(10,700	)		12,289			2,402			28,122
Income (loss) before taxes	$	101,332		$	197,815		$	153,121		$	364,165

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

	Three Months Ended				Six Months Ended
	June 30,				June 30,
(Dollars in thousands)	2016		2015		2016		2015
Canada gross written premiums	$	34,630	$	30,160	$	58,216	$	53,672