Segment Reporting (Tables)

3 Months Ended

Mar. 31, 2016

Segment Reporting [Abstract]

Schedule Of Underwriting Results For Operating Segments

	Three Months Ended
U.S. Reinsurance	March 31,
(Dollars in thousands)	2016		2015
Gross written premiums	$	536,706	$	562,647
Net written premiums		470,691		484,403
Premiums earned	$	486,541	$	511,094
Incurred losses and LAE		236,444		244,886
Commission and brokerage		117,317		122,784
Other underwriting expenses		13,459		11,529
Underwriting gain (loss)	$	119,321	$	131,895

	Three Months Ended
International	March 31,
(Dollars in thousands)	2016		2015
Gross written premiums	$	235,591	$	326,998
Net written premiums		202,500		261,738
Premiums earned	$	250,450	$	305,569
Incurred losses and LAE		147,535		179,652
Commission and brokerage		64,286		70,614
Other underwriting expenses		7,823		8,115
Underwriting gain (loss)	$	30,806	$	47,188

	Three Months Ended
Bermuda	March 31,
(Dollars in thousands)	2016		2015
Gross written premiums	$	204,732	$	188,121
Net written premiums		184,314		174,566
Premiums earned	$	194,428	$	195,704
Incurred losses and LAE		111,521		110,015
Commission and brokerage		49,922		51,133
Other underwriting expenses		9,185		8,800
Underwriting gain (loss)	$	23,800	$	25,756

	Three Months Ended
Insurance	March 31,
(Dollars in thousands)	2016			2015
Gross written premiums	$	376,160		$	340,258
Net written premiums		323,952			303,581
Premiums earned	$	287,448		$	260,121
Incurred losses and LAE		205,249			180,601
Commission and brokerage		43,481			38,563
Other underwriting expenses		41,643			30,297
Underwriting gain (loss)	$	(2,925	)	$	10,660

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

	Three Months Ended
	March 31,
(Dollars in thousands)	2016			2015
Underwriting gain (loss)	$	171,002		$	215,498
Net investment income		102,524			122,566
Net realized capital gains (losses)		(74,259	)		(10,505	)
Net derivative gain (loss)		(3,020	)		(242	)
Corporate expenses		(7,886	)		(5,463	)
Interest, fee and bond issue cost amortization expense		(9,228	)		(8,990	)
Other income (expense)		(2,066	)		51,281
Income (loss) before taxes	$	177,067		$	364,145

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

	Three Months Ended
	March 31,
(Dollars in thousands)	2016		2015
United Kingdom gross written premium	$	182,630	$	197,936