Segment Reporting (Tables)

12 Months Ended

Dec. 31, 2015

Segment Reporting [Abstract]

Schedule Of Underwriting Results For Operating Segments

U.S. Reinsurance	Years Ended December 31,
(Dollars in thousands)	2015		2014		2013
Gross written premiums	$	1,963,466	$	2,039,578	$	1,809,669
Net written premiums		1,855,853		1,983,800		1,807,067
Premiums earned	$	1,952,680	$	1,986,769	$	1,671,513
Incurred losses and LAE		825,081		954,525		814,668
Commission and brokerage		493,261		466,291		366,890
Other underwriting expenses		50,087		45,583		47,176
Underwriting gain (loss)	$	584,251	$	520,370	$	442,779

International	Years Ended December 31,
(Dollars in thousands)	2015		2014		2013
Gross written premiums	$	1,294,049	$	1,582,426	$	1,345,770
Net written premiums		1,208,978		1,336,633		1,327,430
Premiums earned	$	1,251,111	$	1,310,903	$	1,289,341
Incurred losses and LAE		749,891		748,174		675,362
Commission and brokerage		298,180		306,229		295,883
Other underwriting expenses		34,303		34,598		33,910
Underwriting gain (loss)	$	168,737	$	221,902	$	284,186

Bermuda	Years Ended December 31,
(Dollars in thousands)	2015		2014		2013
Gross written premiums	$	852,489	$	770,249	$	774,268
Net written premiums		791,594		744,664		765,660
Premiums earned	$	822,391	$	715,736	$	737,986
Incurred losses and LAE		456,448		361,792		374,375
Commission and brokerage		215,992		198,848		179,138
Other underwriting expenses		36,017		34,923		34,654
Underwriting gain (loss)	$	113,934	$	120,173	$	149,819

Insurance	Years Ended December 31,
(Dollars in thousands)	2015			2014			2013
Gross written premiums	$	1,532,287		$	1,218,372		$	1,268,745
Net written premiums		1,325,886			1,067,333			1,086,217
Premiums earned	$	1,266,660		$	1,030,299		$	1,037,425
Incurred losses and LAE		1,033,295			811,445			931,466
Commission and brokerage		176,213			149,777			133,695
Other underwriting expenses		136,661			118,001			119,283
Underwriting gain (loss)	$	(79,509	)	$	(48,924	)	$	(147,019	)

Mt. Logan Re	Years Ended December 31,
(Dollars in thousands)	2015		2014		2013
Gross written premiums	$	234,001	$	138,362	$	20,182
Net written premiums		195,950		124,473		18,447
Premiums earned	$	188,617	$	125,428	$	17,278
Incurred losses and LAE		37,200		30,598		4,380
Commission and brokerage		18,390		14,441		1,952
Other underwriting expenses		8,916		7,295		2,103
Underwriting gain (loss)	$	124,111	$	73,094	$	8,843

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

	Years Ended December 31,
(Dollars in thousands)	2015			2014			2013
Underwriting gain (loss)	$	911,524		$	886,615		$	738,608
Net investment income		473,825			530,570			548,509
Net realized capital gains (losses)		(184,147	)		84,046			300,227
Net derivative gain (loss)		6,317			(11,599	)		44,044
Corporate expenses		(23,254	)		(23,421	)		(24,817	)
Interest, fee and bond issue cost amortization expense		(36,191	)		(38,533	)		(46,118	)
Other income (expense)		60,435			18,437			(5,487	)
Income (loss) before taxes	$	1,208,509		$	1,446,115		$	1,554,966

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

	Years Ended December 31,
(Dollars in thousands)	2015		2014		2013
United Kingdom	$	740,763	$	676,490	$	555,332