Stock-based Compensation - Additional Information (Details) (USD $)	3 Months Ended		6 Months Ended		1 Months Ended			6 Months Ended							3 Months Ended		6 Months Ended		3 Months Ended		6 Months Ended		3 Months Ended		6 Months Ended		3 Months Ended		6 Months Ended
	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2013	Jun. 30, 2012	May 31, 2011 Incentive Plan 2005	May 19, 2011 Incentive Plan 2005	Jun. 30, 2013 Amended And Restated 2005 Stock Incentive Plan	Jun. 30, 2013 Employee Stock Purchase Plan 2010	Jun. 30, 2013 Restricted Stock Units (RSUs)	Jun. 30, 2013 Market Performance Based Restricted Stock Units	Jun. 30, 2013 Market Performance Based Restricted Stock Units Minimum	Jun. 30, 2013 Market Performance Based Restricted Stock Units Maximum	Jun. 30, 2013 Stock Options	Jun. 30, 2013 Employee Stock Purchase Plan	Jun. 30, 2013 Cost of Sales [Member]	Jun. 30, 2012 Cost of Sales [Member]	Jun. 30, 2013 Cost of Sales [Member]	Jun. 30, 2012 Cost of Sales [Member]	Jun. 30, 2013 Selling and Marketing Expense [Member]	Jun. 30, 2012 Selling and Marketing Expense [Member]	Jun. 30, 2013 Selling and Marketing Expense [Member]	Jun. 30, 2012 Selling and Marketing Expense [Member]	Jun. 30, 2013 General and Administrative Expense [Member]	Jun. 30, 2012 General and Administrative Expense [Member]	Jun. 30, 2013 General and Administrative Expense [Member]	Jun. 30, 2012 General and Administrative Expense [Member]	Jun. 30, 2013 Research and Development Expense [Member]	Jun. 30, 2012 Research and Development Expense [Member]	Jun. 30, 2013 Research and Development Expense [Member]	Jun. 30, 2012 Research and Development Expense [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock-based compensation expense	$ 7,265,000	$ 5,279,000	$ 13,675,000	$ 10,142,000											$ 637,000	$ 457,000	$ 1,217,000	$ 920,000	$ 2,012,000	$ 1,447,000	$ 3,023,000	$ 2,618,000	$ 3,556,000	$ 2,493,000	$ 7,483,000	$ 4,922,000	$ 1,060,000	$ 882,000	$ 1,952,000	$ 1,682,000
Approved increase in shares					7,000,000
Shares reserved for issuance						23,283,379	5,000,000
Total unamortized compensation cost									$ 42,800,000	$ 7,700,000			$ 2,900,000	$ 2,400,000
Weighted average period of total unamortized cost (in years)									2 years 10 months 24 days	2 years 1 month 6 days			1 year 1 month 6 days	8 months 12 days
Vesting period of granted market-performance based restricted stock units											2 years	3 years
Percentage of market-performance based restricted stock units eligible to vest over the vesting period												150.00%
Maximum number of shares available								2,400,000
Number of shares remaining								1,738,963