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Stock-Based Compensation - Additional Information (Detail) - USD ($)
3 Months Ended 6 Months Ended 12 Months Ended
Jan. 02, 2016
Jun. 30, 2017
Jun. 30, 2016
Jun. 30, 2017
Jun. 30, 2016
Dec. 31, 2016
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Stock-based compensation expense   $ 9,350,000 $ 4,465,000 $ 15,558,000 $ 8,179,000  
Weighted average grant date fair value per share       $ 39.62 $ 22.23  
Performance Shares [Member]            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Options granted       449,208 74,039  
Total unrecognized stock-based compensation expense   $ 14,800,000   $ 14,800,000    
Number of shares outstanding and unvested stock options   686,252   686,252    
Performance-Based Stock Options [Member]            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Stock-based compensation expense       $ 0 $ 0  
Stock Options [Member]            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Options granted       2,070,550    
Total unrecognized stock-based compensation expense   $ 82,800,000   $ 82,800,000    
Weighted average period of unrecognized compensation costs       2 years 11 months 27 days    
Total fair value of options vested       $ 12,800,000 $ 9,700,000  
Restricted Stock Awards [Member]            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Stock-based compensation expense   $ 200,000   $ 300,000    
Restricted stock units granted       32,500    
Restricted stock units vesting period       2 years    
Restricted Stock Awards [Member] | Restricted Stock Units Vest One Year Anniversary [Member]            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Restricted stock units cliff vesting percentage       50.00%    
Restricted Stock Awards [Member] | Restricted Stock Units Vest Two Year Anniversary [Member]            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Restricted stock units cliff vesting percentage       50.00%    
2016 Stock Option Plan and 2014 Stock Option and Incentive Plan [Member]            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Total number of shares reserved under option plans   8,184,406   8,184,406    
Common stock available for issuance under stock option plans   2,153,933   2,153,933    
2014 Stock Option Plan [Member]            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Common stock shares annual increase added to plan 1,488,886          
2014 Stock Option Plan [Member] | Maximum [Member]            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Percentage of increase on issued and outstanding shares of Common stock           4.00%