Consolidated Statements of Comprehensive Income (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2012	Jun. 30, 2011	Jun. 30, 2012	Jun. 30, 2011
Net income (loss)	$ 376,548	$ (43,105)	$ (106,476)	$ 96,151
Investments with no other-than-temporary impairment, net of tax provision (benefit) of $8,333, $61,394, $27,382 and $41,762	31,925	127,198	74,048	80,808
Investments with other-than-temporary impairment, net of tax provision (benefit) of $(1,141), $(5,323), $(8,486) and $3,872	(4,321)	(12,389)	(18,057)	8,456
Unrealized holding gains (losses) arising during the period, net of tax	27,604	114,809	55,991	89,264
Less: reclassification adjustment for gains (losses) included in net income (loss), net of tax provision (benefit) of $(3,975), $(1,743), $(5,247), and $(1,571)	(4,637)	(4,227)	(5,493)	(3,198)
Change in net unrealized gains on investments	32,241	119,036	61,484	92,462
Change in cumulative translation adjustment, net of tax provision (benefit) of $(636), $191, $305 and $860	(1,182)	346	568	1,589
Change in cash flow hedge, net of tax provision (benefit) of $(57), $(57), $(113) and $(113)	(104)	(104)	(209)	(209)
Other comprehensive income (loss)	30,955	119,278	61,843	93,842
Comprehensive income (loss)	$ 407,503	$ 76,173	$ (44,633)	$ 189,993