Condensed Consolidated Statements of Operations (USD $) In Thousands, except Per Share data	3 Months Ended		9 Months Ended
	Sep. 30, 2011	Sep. 30, 2010	Sep. 30, 2011	Sep. 30, 2010
Premiums written—insurance:
Direct	$ 187,726	$ 200,820	$ 552,575	$ 579,855
Assumed	(251)	575	(10,415)	(8,596)
Ceded	(9,188)	(26,588)	(28,346)	(81,050)
Net premiums written	178,287	174,807	513,814	490,209
Decrease in unearned premiums	1,368	29,130	57,798	115,442
Net premiums earned—insurance	179,655	203,937	571,612	605,651
Net investment income	38,763	46,554	124,826	140,531
Net gains on investments	81,640	94,258	163,311	209,468
Total other-than-temporary impairment ('OTTI') losses	(20)	(34)	(31)	(90)
Losses recognized in other comprehensive income (loss)	0	0	0	0
Net impairment losses recognized in earnings	(20)	(34)	(31)	(90)
Change in fair value of derivative instruments	126,008	229,783	558,626	(372,777)
Net gains (losses) on other financial instruments	80,602	4,882	160,900	(159,882)
Gain on sale of affiliate	0	0	0	34,815
Other income	1,404	1,951	4,048	5,654
Total revenues	508,052	581,331	1,583,292	463,370
Expenses:
Provision for losses	249,598	344,389	940,537	1,323,435
Change in reserve for premium deficiency	(1,942)	8,628	(6,427)	43
Policy acquisition costs	11,449	11,054	39,967	42,719
Other operating expenses	45,240	43,052	137,413	143,273
Interest expense	14,094	9,502	47,197	28,551
Total expenses	318,439	416,625	1,158,687	1,538,021
Equity in net income of affiliates	0	0	65	14,668
Pretax income (loss)	189,613	164,706	424,670	(1,059,983)
Income tax provision (benefit)	6,045	52,521	981	(386,733)
Net income (loss)	$ 183,568	$ 112,185	$ 423,689	$ (673,250)
Basic net income (loss) per share	$ 1.39	$ 0.85	$ 3.20	$ (6.20)
Diluted net income (loss) per share	$ 1.37	$ 0.84	$ 3.16	$ (6.20)
Weighted-average number of common shares outstanding—basic	132,364	132,324	132,366	108,608
Weighted-average number of common and common equivalent shares outstanding—diluted	133,513	133,520	133,867	108,608
Dividends per share	$ 0.0025	$ 0.0025	$ 0.0075	$ 0.0075