Stockholders' Equity (Details 3) (USD $)	3 Months Ended		9 Months Ended
	Sep. 30, 2012	Sep. 30, 2011	Sep. 30, 2012	Sep. 30, 2011
Share-based compensation expense related to outstanding awards
Share-based compensation expense			$ 40,568,000	$ (37,790,000)
Stock Options
Share-based compensation expense related to outstanding awards
Share-based compensation expense before taxes	4,042,000	8,000	6,371,000	511,000
Related income tax benefit	(1,480,000)	(3,000)	(2,333,000)	(189,000)
Share-based compensation expense (benefit), net of taxes	2,562,000	5,000	4,038,000	322,000
Share-based compensation capitalized as part of inventory				15,000
Employee Stock Purchase Plan (ESPP)
Share-based compensation expense related to outstanding awards
Offering period	6 months
Maximum percentage of compensation employees may contribute for purchase of common stock under the ESPP	15.00%
Percentage of the lower of the fair market value of common stock on the first or last trading-day of a given offering period	85.00%
Maximum number of shares of common stock each eligible employees may purchase in any given offering period	4,000
Term of employee stock purchase plan	20 years
Maximum number of shares authorized to be issued Aggregate number of shares authorized to be issued	3,000,000		3,000,000
Share-based compensation expense	60,000		60,000
Method and assumptions on valuation of stock options
Expected volatility (as a percent)			29.00%
Risk-free interest rate (as a percent)			0.10%
Expected term (in years)			6 months
Expected dividend yield (as a percent)			0.00%
Expected forfeiture rate (as a percent)			4.60%
Research and development | Stock Options
Share-based compensation expense related to outstanding awards
Share-based compensation expense before taxes		3,000		196,000
Selling, general and administrative | Stock Options
Share-based compensation expense related to outstanding awards
Share-based compensation expense before taxes	$ 4,042,000	$ 5,000	$ 6,371,000	$ 315,000