Condensed Consolidated Statements of Comprehensive (Loss) 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 (loss) income	$ (119,259)	$ 137,115	$ (288,491)	$ 240,121
Foreign Currency Translation Adjustments:
Unrealized foreign currency translation adjustment	(8)	4,955	(8)	6,520
Less: Reclassification adjustment for net gains included in net (loss) income	0	28,246	0	27,954
Net foreign currency translation adjustment	(8)	(23,291)	(8)	(21,434)
Unrealized Gain on Investments:
Unrealized holding (losses) gains arising during the period	(1,419)	5,549	15,795	13,615
Less: Reclassification adjustment for net (losses) gains included in net (loss) income	(741)	(35,016)	8,869	(34,938)
Net unrealized (losses) gains on investments	(678)	40,565	6,926	48,553
Other Comprehensive (Loss) Income	(686)	17,274	6,918	27,119
Comprehensive (Loss) Income	$ (119,945)	$ 154,389	$ (281,573)	$ 267,240