Condensed Consolidated Statements Of Comprehensive Income (Loss) (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 income (loss)	$ 51,277	$ 9,053	$ 22,554	$ (99,917)
Other comprehensive income (loss), net of tax:
Unrealized gain (loss) on marketable securities, net of tax	24	(15)	59	(69)
Add: reclassification adjustment for net gains (losses) included in net income, net of tax	0	0	0	0
Other comprehensive income (loss)	24	(15)	59	(69)
Comprehensive income (loss)	$ 51,301	$ 9,038	$ 22,613	$ (99,986)