Consolidated Statements of Comprehensive Income (USD $) In Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2011	Jun. 30, 2010	Jun. 30, 2011	Jun. 30, 2010
Net income (loss)	$ (57,667)	$ 203,538	$ 67,740	$ 525,513
Unrealized holding gains (losses) arising during the period, net of tax provision (benefit) of $56,487, $3,785, $46,229 and $(1,597)	115,580	48,183	90,368	57,397
Less: reclassification adjustment for gains (losses) included in net income (loss), net of tax provision (benefit) of $(1,743), $(4,206), $(1,571) and $(1,438)	(4,227)	(4,232)	(3,198)	2,413
Change in net unrealized gains on investments	119,807	52,415	93,566	54,984
Change in cumulative translation adjustment, net of tax provision (benefit) of $191, $(746), $860 and $(2,854)	346	(1,375)	1,589	(5,259)
Change in cash flow hedge, net of tax provision (benefit) of $(57), $(57), $(113) and $(113)	(104)	(104)	(209)	(209)
Other comprehensive income (loss)	120,049	50,936	94,946	49,516
Comprehensive income (loss)	$ 62,382	$ 254,474	$ 162,686	$ 575,029