Consolidated Statements of Comprehensive Income (Loss) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Net (loss) income	$ (196,985)	$ (451,468)	$ 302,150
Foreign currency translation adjustments:
Unrealized foreign currency translation adjustment	0	(7)	6,265
Less: Reclassification adjustment for liquidation of foreign subsidiary and other adjustments included in net (loss) income	0	0	27,305
Net foreign currency translation adjustments	0	(7)	(21,040)
Unrealized gains (losses) on investments:
Unrealized holding gains arising during the period	21,969	14,132	7,400
Less: Reclassification adjustment for net gains (losses) included in net (loss) income	879	9,272	(31,928)
Net unrealized gains on investments	21,090	4,860	39,328
Other comprehensive income	21,090	4,853	18,288
Comprehensive (loss) income	$ (175,895)	$ (446,615)	$ 320,438