Condensed Consolidated Statements of Comprehensive Income (Loss) (Unaudited) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
Net income (loss)	$ 153,590	$ (12,682)	$ 531,182	$ (233,354)
Foreign currency translation adjustments:
Unrealized foreign currency translation adjustment	(186)	0	(186)	0
Less: Reclassification adjustment for net gains (losses) included in net income (loss)	0	0	0	0
Net foreign currency translation adjustments	(186)	0	(186)	0
Unrealized (losses) gains on investments:
Unrealized holding (losses) gains arising during the period	(2,236)	4,978	11,530	13,924
Less: Reclassification adjustment for net (losses) gains included in net income (loss)	(419)	304	(287)	879
Net unrealized (losses) gains on investments	(1,817)	4,674	11,817	13,045
Other comprehensive (loss) income, net of tax	(2,003)	4,674	11,631	13,045
Comprehensive income (loss)	$ 151,587	$ (8,008)	$ 542,813	$ (220,309)