Revenue Recognition - Summary of Contract Liabilities Activity (Details) - USD ($) $ in Thousands	9 Months Ended
	Apr. 30, 2020	Apr. 30, 2019	Apr. 30, 2020	Jul. 31, 2019	Apr. 30, 2019
Contract Liability Activity
Beginning Balance	$ 28,235	$ 29,015
Revenue deferred in current year	41,733	48,589
Deferred revenue recognized	(42,705)	(49,710)
Foreign currency translation	(70)	(435)
Ending balance	$ 28,235	$ 29,015	$ 27,193	$ 28,235	$ 27,459
Contract liabilities included in Other long-term liabilities			(309)		(824)
Deferred revenue			$ 26,884	$ 27,840	$ 26,635