Segment Reporting (Tables)

3 Months Ended

Mar. 31, 2020

Segment Reporting [Abstract]

Schedule Of Underwriting Results For Operating Segments

	Three Months Ended
Reinsurance	March 31,
(Dollars in thousands)	2020		2019
Gross written premiums	$	1,308,194	$	1,153,111
Net written premiums		1,114,235		975,999
Premiums earned	$	1,007,034	$	897,278
Incurred losses and LAE		682,707		553,714
Commission and brokerage		260,901		236,965
Other underwriting expenses		29,847		24,056
Underwriting gain (loss)	$	33,579	$	82,543

	Three Months Ended
Insurance	March 31,
(Dollars in thousands)	2020		2019
Gross written premiums	$	666,771	$	531,771
Net written premiums		524,474		416,244
Premiums earned	$	486,970	$	373,176
Incurred losses and LAE		346,805		242,382
Commission and brokerage		62,203		51,253
Other underwriting expenses		71,361		54,326
Underwriting gain (loss)	$	6,601	$	25,215

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

	Three Months Ended
	March 31,
(Dollars in thousands)	2020		2019
Underwriting gain (loss)	$	40,180	$	107,758
Net investment income		74,201		84,534
Net realized capital gains (losses)		256,867		135,056
Corporate expense		(3,721)		(1,651)
Interest, fee and bond issue cost amortization expense		(7,460)		(9,828)
Other income (expense)		(4,498)		(730)
Income (loss) before taxes	$	355,569	$	315,139

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

	Three Months Ended
	March 31,
(Dollars in thousands)	2020		2019
Canada gross written premiums	$	63,637	$	39,050