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Equity Incentive Plans - Narrative (Details)
3 Months Ended 6 Months Ended
Aug. 01, 2021
USD ($)
period
shares
Aug. 02, 2020
USD ($)
Aug. 01, 2021
USD ($)
plan
period
shares
Aug. 02, 2020
USD ($)
Share-based Payment Arrangement [Abstract]        
Number of equity incentive plans | plan     2  
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Number of equity incentive plans | plan     2  
Equity awards expiration period (no later than)     10 years  
Total stock-based compensation expense $ 70,429,000 $ 61,452,000 $ 131,763,000 $ 120,146,000
2015 Employee Stock Purchase Plan        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Employee stock purchase plan offering period     24 months  
Number of purchase periods | period 4   4  
Purchase period, term     6 months  
Reset charges   23,800,000 $ 0  
Total stock-based compensation expense $ 8,800,000 $ 6,400,000 16,400,000 $ 12,000,000
Unrecognized stock-based compensation expense $ 25,200,000   $ 25,200,000  
Compensation cost (in years)     9 months 18 days  
2015 Employee Stock Purchase Plan | Class A        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Payroll deductions percentage 30.00%   30.00%  
Share cap for ESPP at purchase date (in shares) | shares 3,000   3,000  
Dollar cap per purchase period     $ 7,500  
Calendar year gap for ESPP contribution amount     $ 25,000  
Purchase price as percentage of fair market value of common stock     85.00%  
Minimum        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Vesting period (in years)     2 years  
Maximum        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Vesting period (in years)     4 years