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Common Stock and Stockholders' Equity - Additional Information (Details) - USD ($)
$ / shares in Units, $ in Millions
6 Months Ended
May 06, 2016
Jan. 02, 2016
Jun. 30, 2016
Dec. 31, 2015
Class Of Stock [Line Items]        
Common stock, shares authorized     400,000,000 400,000,000
Common stock, par value     $ 0.01 $ 0.01
Common stock, shares issued     93,900,000 90,900,000
Common stock, shares outstanding     93,400,000 90,300,000
Common stock shares outstanding, subject to repurchase     200,000 300,000
Preferred stock, shares authorized     10,000,000 10,000,000
Preferred stock, par value     $ 0.01 $ 0.01
Preferred stock, shares issued     0 0
Preferred stock, shares outstanding       0
Increase in authorized shares     5,716,000.000  
Shares of common stock available for issuance     5,922,000 4,323,000
Stock options granted, shares 1,200,000   1,158,000  
Share price     $ 26.38  
Future period share-based compensation expense     $ 203.0  
Future period share-based compensation expense, period to recognized     3 years  
Shares outstanding as a result of early exercise of stock options and purchase of unvested stock awards     200,000 300,000
Accrued liability for shares outstanding as a result of early exercise of stock options and purchase of unvested stock awards     $ 0.7 $ 1.0
2009 Stock Option and Grant Plan        
Class Of Stock [Line Items]        
Shares of common stock available for issuance     0  
2014 Plan | Employee Stock Option        
Class Of Stock [Line Items]        
Increase in authorized shares   4,500,000.0    
Shares of common stock available for issuance     5,900,000  
Employee Stock Purchase Plan        
Class Of Stock [Line Items]        
Percentage of purchase price of shares lower of the fair market value of common stock employees are able to purchase shares     85.00%  
Common shares purchased     300,000.0  
Increase in authorized shares   900,000.0    
Shares of common stock available for issuance     3,500,000