Unaudited Quarterly Financial Data (Tables)

12 Months Ended

Dec. 31, 2013

Unaudited Quarterly Financial Data [Abstract]

Summary Of Quarterly Financial Data

	2013
(Dollars in thousands)	1st Quarter		2nd Quarter		3rd Quarter		4th Quarter
Operating data:
Gross written premiums	$	983,746	$	1,080,305	$	1,239,528	$	1,133,889
Net written premiums		476,167		531,610		585,262		524,338
Premiums earned		448,006		490,022		523,521		544,812
Net investment income		76,869		81,736		68,828		69,563
Net realized capital gains (losses)		309,806		15,526		208,426		189,391
Total claims and underwriting expenses		380,285		453,548		427,626		498,118
Net income (loss)		285,651		85,262		243,753		183,597

	2012
(Dollars in thousands)	1st Quarter		2nd Quarter		3rd Quarter		4th Quarter
Operating data:
Gross written premiums	$	857,191	$	732,879	$	1,010,883	$	968,437
Net written premiums		427,379		339,432		458,866		465,924
Premiums earned		433,711		438,470		427,112		474,605
Net investment income		81,242		74,206		76,342		74,355
Net realized capital gains (losses)		176,141		82,589		95,943		37,029
Total claims and underwriting expenses		377,402		428,041		359,279		566,325
Net income (loss)		214,724		125,653		155,985		23,967