Income Taxes Schedule of Deferred Tax Assets and Liabilities (Details) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2012	Dec. 31, 2011
Deferred tax assets:
Capital research and development expenditures	$ 4,790	$ 7,334
Accrued liabilities	6,794	5,112
Impairment of investment in other companies	3,890	5,821
Inventory	7,443	6,220
Net operating loss carryforwards	33,029	50,155
Research and development, and other credits	19,411	18,404
Stock-based compensation	21,236	14,466
Other	12,544	12,008
Gross deferred tax assets	109,137	119,520
Valuation allowance	(14,518)	(11,522)
Total deferred tax assets	94,619	107,998
Deferred tax liabilities:
Fixed assets	(24,904)	(47,184)
Total deferred tax liabilities	(24,904)	(47,184)
Total deferred tax assets, net	$ 69,715	$ 60,814