Income Taxes Schedule of Deferred Tax Assets and Liabilities (Details) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2011	Dec. 31, 2010
Deferred tax assets:
Capital research and development expenditures	$ 7,334	$ 10,717
Accrued liabilities	5,112	9,185
Impairment of investment in other companies	5,821	6,310
Inventory	6,220	7,197
Net operating loss carryforwards	50,155	29,052
Research and development, and other credits	18,404	9,786
Stock-based compensation	14,466	9,971
Other	12,008	3,685
Gross deferred tax assets	119,520	85,903
Valuation allowance	(11,522)	(11,391)
Total deferred tax assets	107,998	74,512
Deferred tax liabilities:
Fixed assets	47,184	(470)
Total deferred tax liabilities	47,184	(470)
Total deferred tax assets, net	$ 60,814	$ 74,982