XML 73 R55.htm IDEA: XBRL DOCUMENT v3.6.0.2
Stock Option and Compensation Plans (Details) - USD ($)
1 Months Ended 12 Months Ended
Jan. 01, 2017
Jan. 01, 2016
Jan. 01, 2015
Jan. 01, 2014
Apr. 30, 2016
Aug. 31, 2013
Dec. 31, 2016
Dec. 31, 2015
Dec. 31, 2014
Stock Option and Compensation Plans                  
Options outstanding (in shares)             2,665,000    
Weighted-average exercise price of options (in dollars per share)             $ 38.95    
Weighted-average remaining contractual life of options             7 years 6 months    
Aggregate intrinsic value of options outstanding             $ 300,000    
Share-based compensation expense             31,660,000 $ 24,760,000 $ 13,040,000
ESPP                  
Stock Option and Compensation Plans                  
Purchase price of common stock as percentage of fair market value         85.00%        
Share-based compensation expense             $ 0 0 0
Expected weighted average period to recognize share-based compensation costs             3 months    
Unrecognized compensation costs, net of estimated forfeitures             $ 100,000    
Restricted stock units                  
Stock Option and Compensation Plans                  
RSUs expected to vest (in shares)             285,000    
Weighted-average fair value of RSUs expected to vest (in dollars per share)             $ 56.07    
Aggregate intrinsic value of RSUs expected to vest             $ 1,400,000    
Total fair value vested             4,800,000    
Employees | Stock options                  
Stock Option and Compensation Plans                  
Share-based compensation expense             22,800,000 15,500,000 11,300,000
Unrecognized share-based compensation costs for option awards, net of estimated forfeitures             $ 25,100,000    
Expected weighted average period to recognize share-based compensation costs             2 years 3 months 18 days    
Employees | Restricted stock units                  
Stock Option and Compensation Plans                  
Share-based compensation expense             $ 6,900,000 5,200,000 300,000
Expected weighted average period to recognize share-based compensation costs             2 years 10 months 24 days    
Unrecognized compensation costs, net of estimated forfeitures             $ 12,000,000    
Consultants | Non-employee Options                  
Stock Option and Compensation Plans                  
Share-based compensation expense             1,700,000 $ 4,100,000 $ 1,400,000
Unrecognized share-based compensation costs for option awards, net of estimated forfeitures             $ 5,400,000    
Expected weighted average period to recognize share-based compensation costs             2 years 6 months    
Maximum | ESPP                  
Stock Option and Compensation Plans                  
Number of shares reserved for issuance under the Plan (in shares)         1,000,000        
2007 Plan                  
Stock Option and Compensation Plans                  
Number of shares of common stock available for issuance under the Plan (in shares)           739,317      
2013 Plan                  
Stock Option and Compensation Plans                  
Number of shares of common stock available for issuance under the Plan (in shares)             1,028,000    
Annual increase in shares reserved for issuance under the Plan (in shares)           2,542,372      
Annual increase in shares reserved for issuance under the Plan (as a percent)           4.00%      
Increase in number of shares available under the Plan (in shares)   1,408,000 1,360,000 1,257,000          
2013 Plan | Subsequent Event                  
Stock Option and Compensation Plans                  
Increase in number of shares available under the Plan (in shares) 1,429,000                
2013 Plan | Maximum                  
Stock Option and Compensation Plans                  
Number of shares reserved for issuance under the Plan (in shares)           3,359,641