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Benefit Plans - ESPP Information (Details) - USD ($)
shares in Thousands, $ in Thousands
3 Months Ended 6 Months Ended
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2019
Dec. 31, 2018
Equity Incentive Plans        
Compensation expense $ 12,770 $ 10,099 $ 24,832 $ 19,524
Employee stock purchase plan shares        
Equity Incentive Plans        
Percentage of employee compensation, maximum 10.00%   10.00%  
Percentage of fair market value as a purchase price     85.00%  
Maximum value of purchase per employee     $ 25  
Number of shares per employee, maximum     2  
Period during which shares can be purchased     1 year  
Number of shares of common stock reserved for issuance 950   950  
Potential number of additional shares reserved for issuance each year     400  
Potential number of additional shares reserved for issuance each year (as percent)     0.75%  
Number of shares issued     45  
Compensation expense $ 715 $ 446 $ 1,377 $ 885
Valuation assumptions:        
Expected dividend yield     0.00% 0.00%
Expected term (years)     6 months 6 months
Employee stock purchase plan shares | Minimum        
Valuation assumptions:        
Expected volatility     38.60% 33.50%
Risk-free interest rate     1.58% 2.10%
Employee stock purchase plan shares | Maximum        
Equity Incentive Plans        
Offering period     27 months  
Valuation assumptions:        
Expected volatility     43.30% 38.30%
Risk-free interest rate     2.44% 2.48%