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Equity Recognized Stock-Based Compensation (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2015
Dec. 31, 2014
Dec. 31, 2013
Share-based Compensation [Abstract]      
Stock-based compensation expense $ 16,896 $ 11,453 $ 6,010
Cost of sales      
Share-based Compensation [Abstract]      
Stock-based compensation expense 352 322 279
Research and development      
Share-based Compensation [Abstract]      
Stock-based compensation expense 790 660 417
Selling, general and administrative      
Share-based Compensation [Abstract]      
Stock-based compensation expense $ 15,754 $ 10,471 $ 5,314