Condensed Consolidated Statements of Comprehensive Income (Loss) (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 income (loss)	$ 13,370	$ (4,716)	$ 23,208	$ (13,005)
Other comprehensive income (loss), net of tax
Foreign currency translation adjustments	263	55	294	279
Reclassification of cumulative currency translation gain	(2,782)		(2,782)
Unrealized (losses) gains on available for sale securities	(33)	(9)	(92)	105
Total other comprehensive income (loss), net of tax	(2,552)	46	(2,580)	384
Comprehensive income (loss)	$ 10,818	$ (4,670)	$ 20,628	$ (12,621)