Employee Benefit Plans - Additional Information (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Oct. 31, 2020	Oct. 31, 2019	Oct. 31, 2020	Oct. 31, 2019
United States
Defined Contribution Plan Disclosure [Line Items]
Defined contribution expense related to plan	$ 2.6	$ 1.8	$ 5.4	$ 3.7
United States | Maximum
Defined Contribution Plan Disclosure [Line Items]
Percentage of defined contribution to participating employees			6.00%
Other Countries
Defined Contribution Plan Disclosure [Line Items]
Defined contribution expense related to plan	$ 1.2	$ 0.8	$ 2.3	$ 1.6