Leases - Other information (Details) - USD ($) $ in Thousands	Jan. 31, 2021	Apr. 30, 2020
Finance leases included in property and equipment
Accumulated depreciation	$ (184,410)	$ (158,554)
Property and equipment, net	$ 305,144	$ 305,467
Weighted-average remaining lease term (years) - Operating leases	4 years 9 months 18 days	4 years 10 months 24 days
Weighted-average remaining lease term (years) - Finance leases	3 years 6 months	3 years 7 months 6 days
Weighted-average discount rate - Operating leases	5.50%	5.50%
Weighted-average discount rate - Finance leases	4.90%	5.00%
Finance Leased Assets
Finance leases included in property and equipment
Property and equipment	$ 176,529	$ 171,380
Accumulated depreciation	(49,717)	(41,737)
Property and equipment, net	$ 126,812	$ 129,643