Condensed Consolidated Statements of Comprehensive Loss (Unaudited) (USD $) In Thousands, unless otherwise specified	3 Months Ended				6 Months Ended
	Jun. 30, 2013		Jun. 30, 2012		Jun. 30, 2013		Jun. 30, 2012
Net loss	$ (33,172)		$ (119,259)		$ (220,672)		$ (288,491)
Foreign currency translation adjustments:
Unrealized foreign currency translation adjustment, net of tax	0		(8)		0		(8)
Less: Reclassification adjustment for net gains (losses) included in net income (loss), net of tax	0		0		0		0
Net foreign currency translation adjustment, net of tax	0		(8)		0		(8)
Unrealized gains (losses) on investments:
Unrealized holding gains (losses) arising during the period, net of tax	1,480		(1,419)		8,946		15,795
Less: Reclassification adjustment for net gains (losses) included in net loss, net of tax	554	[1]	(741)	[1]	575	[1]	8,869	[1]
Net unrealized gains (losses) on investments, net of tax	926		(678)		8,371		6,926
Other comprehensive income (loss)	926		(686)		8,371		6,918
Comprehensive loss	$ (32,246)		$ (119,945)		$ (212,301)		$ (281,573)

[1] Included in net (losses) gains on investments on our condensed consolidated statements of operations.