Segment Reporting (Tables)

9 Months Ended

Sep. 30, 2020

Segment Reporting [Abstract]

Schedule Of Underwriting Results For Operating Segments

	Three Months Ended				Nine Months Ended
Reinsurance	September 30,				September 30,
(Dollars in thousands)	2020		2019		2020		2019
Gross written premiums	$	1,473,266	$	1,297,228	$	3,906,355	$	3,464,773
Net written premiums		1,296,107		1,141,437		3,403,090		2,955,349
Premiums earned	$	1,153,740	$	996,545	$	3,223,608	$	2,852,045
Incurred losses and LAE		936,904		800,711		2,250,270		1,935,706
Commission and brokerage		265,095		297,499		818,282		793,027
Other underwriting expenses		35,697		30,406		92,143		79,822
Underwriting gain (loss)	$	(83,956)	$	(132,071)	$	62,913	$	43,490

	Three Months Ended				Nine Months Ended
Insurance	September 30,				September 30,
(Dollars in thousands)	2020		2019		2020		2019
Gross written premiums	$	591,695	$	592,775	$	1,971,818	$	1,798,149
Net written premiums		429,594		428,518		1,462,869		1,326,714
Premiums earned	$	461,717	$	431,855	$	1,424,814	$	1,222,432
Incurred losses and LAE		340,947		297,382		1,032,926		801,705
Commission and brokerage		57,309		60,182		182,925		169,647
Other underwriting expenses		73,669		65,287		212,562		177,604
Underwriting gain (loss)	$	(10,208)	$	9,004	$	(3,599)	$	73,476

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)	2020		2019		2020		2019
Underwriting gain (loss)	$	(94,164)	$	(123,067)	$	59,314	$	116,966
Net investment income		135,428		95,592		244,782		270,835
Net realized capital gains (losses)		115,193		112,542		(107,300)		390,161
Corporate expense		(4,206)		(3,183)		(11,441)		(7,353)
Interest, fee and bond issue cost amortization expense		(6,535)		(7,802)		(20,917)		(27,314)
Other income (expense)		(1,790)		(2,673)		(11,410)		(8,459)
Income (loss) before taxes	$	143,926	$	71,409	$	153,028	$	734,836

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)	2020		2019		2020		2019
Canada gross written premiums	$	65,785	$	52,136	$	200,443	$	138,392