Unaudited Condensed Consolidated Statements Of Operations And Comprehensive Income (Loss) (USD $) In Thousands, except Share data, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2012	Sep. 30, 2011	Sep. 30, 2012	Sep. 30, 2011
REVENUES:
Gross premiums written	$ 504,420	$ 442,698	$ 1,832,219	$ 1,522,984
Premiums ceded	(112,883)	(92,438)	(357,019)	(296,050)
Net premiums written	391,537	350,260	1,475,200	1,226,934
Change in unearned premiums	49,480	21,080	(202,546)	(165,411)
Net premiums earned	441,017	371,340	1,272,654	1,061,523
Net investment income	39,121	47,883	128,781	150,459
Net realized investment gains (losses)	149,813	(130,809)	292,057	(21,555)
Other income - termination fee	0	35,000	0	35,000
Total revenues	629,951	323,414	1,693,492	1,225,427
EXPENSES:
Net losses and loss expenses	258,948	205,546	724,530	745,811
Acquisition costs	51,086	39,680	149,812	120,733
General and administrative expenses	78,572	66,007	222,917	201,164
Amortization of intangible assets	633	767	1,900	2,300
Interest expense	13,822	13,748	41,579	41,235
Foreign exchange loss (gain)	1,023	2,966	(77)	3,708
Total expenses	404,084	328,714	1,140,661	1,114,951
Income (loss) before income taxes	225,867	(5,300)	552,831	110,476
Income tax expense	6,220	5,672	18,677	19,028
NET INCOME (LOSS)	219,647	(10,972)	534,154	91,448
Other comprehensive loss:
Unrealized (losses) gains on investments arising during the period net of applicable deferred income tax benefit (expense) for three months ended September 30, 2012: $15; 2011: ($5,476) and nine months ended September 30, 2012: ($81); 2011: ($3,051)	(29)	20	150	5,656
Reclassification adjustment for net realized investment gains included in net income (loss), net of applicable income tax	0	(5,319)	(13,249)	(44,995)
Other comprehensive loss	(29)	(5,299)	(13,099)	(39,339)
COMPREHENSIVE INCOME (LOSS)	$ 219,618	$ (16,271)	$ 521,055	$ 52,109
PER SHARE DATA
Basic earnings (loss) per share	$ 6.16	$ (0.29)	$ 14.68	$ 2.40
Diluted earnings (loss) per share	$ 6.00	$ (0.29)	$ 14.28	$ 2.30
Weighted average common shares outstanding	35,652,768	38,110,368	36,379,514	38,078,116
Weighted average common shares and common share equivalents outstanding	36,616,734	38,110,368	37,393,093	39,759,780
Dividends paid per share	$ 0.750	$ 0.375	$ 1.500	$ 0.375