Leases - Reconciliation of Future Undiscounted Cash Flows to Operating and Finance Leases (Details) - USD ($) $ in Thousands	Jan. 31, 2020	Apr. 30, 2019
Operating leases
2020	$ 6,305
2021	23,959
2022	17,911
2023	12,762
2024	10,735
Thereafter	36,142
Total lease payments	107,814
Less imputed interest	(13,680)
Total lease liability	94,134
Current maturities	(20,837)	$ 0
Lease liability - long-term	73,297	0
Lease assets	90,530	$ 0
Financing leases
2020	687
2021	2,316
2022	1,381
2023	921
2024	858
Thereafter	338
Total lease payments	6,501
Less imputed interest	(382)
Finance Lease, Liability	6,119
Current maturities	(2,355)
Lease liability - long-term	3,764
Lease assets	$ 10,582