Leases - Other information (Details) - USD ($) $ in Thousands	Jul. 31, 2019	Apr. 30, 2019
Finance leases included in property and equipment
Accumulated depreciation	$ (132,815)	$ (123,583)
Property and equipment, net	$ 287,535	$ 282,349
Weighted-average remaining lease term (years) - Operating leases	4 years 8 months 12 days
Weighted-average remaining lease term (years) - Finance leases	4 years 2 months 12 days
Weighted-average discount rate - Operating leases	5.50%
Weighted-average discount rate - Finance leases	5.40%
Finance Leased Assets
Finance leases included in property and equipment
Property and equipment	$ 143,274
Accumulated depreciation	(31,564)
Property and equipment, net	$ 111,710