Condensed Consolidated Statements of Operations (Unaudited) (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
Revenues:
Net premiums earned—insurance	$ 227,156	$ 211,984	$ 646,935	$ 617,696
Services revenue	42,243	0	42,243	0
Net investment income	26,178	26,732	76,144	81,220
Net (losses) gains on investments	(7,839)	(7,132)	103,831	(142,891)
Change in fair value of derivative instruments	19,360	10,778	126,923	(70,357)
Net gains (losses) on other financial instruments	982	902	(229)	(3,585)
Other income	1,171	1,314	4,115	5,319
Total revenues	309,251	244,578	999,962	487,402
Expenses:
Policyholder Benefits and Claims Incurred, Net and Including Change in Reserves for Premium Deficiency	42,526	154,849	167,527	427,821
Policy acquisition costs	6,034	7,958	23,069	35,159
Direct cost of services	23,896	0	23,896	0
Other operating expenses	56,262	70,974	181,722	212,055
Interest expense	23,989	19,570	66,264	54,871
Amortization of intangible assets	3,294	0	3,294	0
Total expenses	156,001	253,351	465,772	729,906
Equity in net (loss) income of affiliates	0	0	(13)	1
Pretax income (loss)	153,250	(8,773)	534,177	(242,503)
Income tax (benefit) provision	(340)	3,909	2,995	(9,149)
Net income (loss)	$ 153,590	$ (12,682)	$ 531,182	$ (233,354)
Basic net income (loss) per share	$ 0.80	$ (0.07)	$ 2.91	$ (1.43)
Diluted net income (loss) per share	$ 0.67	$ (0.07)	$ 2.37	$ (1.43)
Weighted-average number of common shares outstanding—basic	191,050	171,830	182,357	162,828
Weighted-average number of common and common equivalent shares outstanding—diluted	238,067	171,830	230,662	162,828
Dividends per share	$ 0.0025	$ 0.0025	$ 0.0075	$ 0.0075