Segment Reporting (Tables)

6 Months Ended

Jun. 30, 2020

Segment Reporting [Abstract]

Schedule Of Underwriting Results For Operating Segments

	Three Months Ended				Six Months Ended
Reinsurance	June 30,				June 30,
(Dollars in thousands)	2020		2019		2020		2019
Gross written premiums	$	1,124,895	$	1,014,434	$	2,433,089	$	2,167,545
Net written premiums		992,750		837,913		2,106,984		1,813,912
Premiums earned	$	1,062,833	$	958,222	$	2,069,868	$	1,855,500
Incurred losses and LAE		630,658		581,281		1,313,366		1,134,995
Commission and brokerage		292,286		258,563		553,187		495,528
Other underwriting expenses		26,599		25,360		56,446		49,416
Underwriting gain (loss)	$	113,290	$	93,018	$	146,869	$	175,561

	Three Months Ended				Six Months Ended
Insurance	June 30,				June 30,
(Dollars in thousands)	2020		2019		2020		2019
Gross written premiums	$	713,352	$	673,603	$	1,380,123	$	1,205,374
Net written premiums		508,801		481,952		1,033,275		898,196
Premiums earned	$	476,127	$	417,401	$	963,097	$	790,577
Incurred losses and LAE		345,174		261,941		691,979		504,323
Commission and brokerage		63,413		58,212		125,616		109,465
Other underwriting expenses		67,532		57,991		138,893		112,317
Underwriting gain (loss)	$	8	$	39,257	$	6,609	$	64,472

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)	2020		2019		2020		2019
Underwriting gain (loss)	$	113,298	$	132,275	$	153,478	$	240,033
Net investment income		35,153		90,709		109,354		175,243
Net realized capital gains (losses)		(479,360)		142,563		(222,493)		277,619
Corporate expense		(3,514)		(2,519)		(7,235)		(4,170)
Interest, fee and bond issue cost amortization expense		(6,922)		(9,684)		(14,382)		(19,512)
Other income (expense)		(5,122)		(5,055)		(9,620)		(5,785)
Income (loss) before taxes	$	(346,467)	$	348,289	$	9,102	$	663,428

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)	2020		2019		2020		2019
Canada gross written premiums	$	71,021	$	47,206	$	134,658	$	86,256