Stock-Based Compensation - Summary of Stock-Based Compensation Expense (Detail) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Total stock-based compensation recognized in income (loss)	$ 18,926	$ 20,913	$ 15,539
Amount capitalized in inventory			10
Total stock-based compensation	18,926	20,913	15,549
Cost of revenue [Member]
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Total stock-based compensation recognized in income (loss)	2,996	3,075	2,197
Research and development expense [Member]
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Total stock-based compensation recognized in income (loss)	6,405	6,926	5,013
Selling, general and administrative expense [Member]
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Total stock-based compensation recognized in income (loss)	$ 9,525	$ 10,912	$ 8,329