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Stock-based compensation - Narrative (Detail) - USD ($)
$ in Thousands
1 Months Ended 3 Months Ended 6 Months Ended
Jan. 31, 2021
Jan. 31, 2020
Jun. 30, 2021
Mar. 31, 2021
Jun. 30, 2020
Jun. 30, 2021
Jun. 30, 2020
Jun. 30, 2013
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                
Increased number of issuance of awards under the 2013 Plan (in shares) 2,700,000 2,200,000            
Number of shares available for issuance (in shares)     3,900,000     3,900,000    
Stock-based compensation expense     $ 31,051   $ 48,529 $ 73,525 $ 84,822  
Amount capitalized     400       100  
Unrecognized stock- based compensation expense related to unvested stock options, restricted stock units, performance-based restricted stock units and employee stock purchase plan     193,900     $ 193,900    
Expected weighted-average period related to unvested stock options, restricted stock units, performance-based restricted stock units and employee stock purchase plan           2 years 1 month 6 days    
Granted (in shares)           811,000    
Stock option share exercised (in shares)           209,000    
Proceed from option share exercised           $ 1,300    
Retention Program                
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                
Employee benefits and share-based compensation expense     10,700     24,000    
Maximum                
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                
Amount capitalized         100 700    
ESPP shares and other (in shares)                
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                
Stock-based compensation expense     $ 5,193   8,313 $ 12,275 $ 8,313  
Common shares reserved for future issuance (in shares)               200,000
Increase in shares authorized (in shares)     1,400,000     1,400,000    
ESPP shares and other (in shares) | Maximum                
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                
Shares of common stock issued under plan (in shares)           100,000 100,000  
Restricted stock units (in shares)                
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                
Stock-based compensation expense     $ 8,534   $ 14,143 $ 23,267 $ 25,996  
Unrestricted Stock Awards | 2020 Annual Incentive Program                
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                
Granted (in shares)       400,000        
Unrestricted Stock Awards | Retention Program                
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                
Stock-based compensation expense     $ 5,200     $ 11,900