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CONVERTIBLE SENIOR NOTES (Tables)
 9 Months Ended
Apr. 30, 2020
Debt Disclosure [Abstract]  
Net Proceeds from Notes The total net proceeds from the Notes are as follows:
Amount
(in thousands)
Principal amount$575,000  
Less: initial purchasers' discount(10,781) 
Less: cost of the bond hedges(143,175) 
Add: proceeds from the sale of warrants87,975  
Less: other issuance costs(707) 
Net proceeds $508,312  
Components of Notes
The Notes consisted of the following:
As of
July 31,
2019		April 30,
2020
(in thousands)
Principal amounts:
Principal
$575,000  $575,000  
Unamortized debt discount (1)
(109,956) (87,897) 
Unamortized debt issuance costs (1)
(6,134) (4,903) 
Net carrying amount
$458,910  $482,200  
Carrying amount of equity component (2)
$148,598  $148,598  
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(1)Included in the condensed consolidated balance sheets within convertible senior notes, net and amortized over the remaining life of the Notes using the effective interest rate method. The effective interest rate is 6.62%.
(2)Included in the condensed consolidated balance sheets within additional paid-in capital, net of $3.0 million in equity issuance costs.
Interest Expense Recognized
The following table sets forth the total interest expense recognized related to the Notes:
Three Months Ended
April 30,		Nine Months Ended
April 30,
2019202020192020
(in thousands)
Interest expense related to amortization of debt discount$6,997  $7,475  $20,650  $22,059  
Interest expense related to amortization of debt issuance costs390  417  1,152  1,231  
Total interest expense$7,387  $7,892  $21,802  $23,290