Statutory Financial Data (Tables)

12 Months Ended

Dec. 31, 2012

Statutory Capital And Surplus Disclosure Text Block [Abstract]

Schedule of statutory capital

	Bermuda (1)				U.S. (2)				U.K., Europe and Other
(U.S. dollars in thousands)	2012		2011		2012		2011		2012		2011
Required statutory capital and surplus	$	6,555,743	$	4,923,771	$	649,166	$	637,799	$	1,313,424	$	1,256,865
Actual statutory capital and surplus (3)	$	10,343,015	$	9,152,303	$	2,237,834	$	2,093,694	$	2,495,982	$	3,108,457

Schedule of statutory net income loss

(U.S. dollars in thousands)	2012		2011		2010
Bermuda	$	817,461	$	614,313	$	1,654,736
U.S.		106,510		23,350		116,886
U.K., Europe and Other		157,012		107,255		291,223