Leases - Other information (Details) - USD ($) $ in Thousands	Oct. 31, 2021	Apr. 30, 2021
Finance leases included in property and equipment
Property and equipment	$ 179,682	$ 176,591
Accumulated depreciation	(56,127)	(51,869)
Property and equipment, net	$ 123,555	$ 124,722
Finance lease, right-of-use asset, balance sheet location [Extensible List]	Property and equipment, net of accumulated depreciation of $211,543 and $193,364, respectively	Property and equipment, net of accumulated depreciation of $211,543 and $193,364, respectively
Weighted-average remaining lease term (years)
Operating leases	4 years 7 months 6 days	4 years 8 months 12 days
Finance leases	3 years 2 months 12 days	3 years 6 months
Weighted-average discount rate
Operating leases	5.10%	5.50%
Finance leases	4.50%	4.60%