Leases - Additional Information Related to Leases (Details) - USD ($) $ in Thousands	6 Months Ended
	Oct. 31, 2021	Oct. 31, 2020
Cash Paid For Amounts Included In The Measurement Of Lease Liabilities [Abstract]
Operating cash flows for finance leases	$ 52	$ 30
Operating cash flows for operating leases	12,798	12,164
Financing cash flows for financing leases	607	210
Right-of-use assets obtained in exchange for new finance lease liabilities	1,100	941
Right-of-use assets obtained in exchange for new operating lease liabilities	$ 6,147	$ 6,788
Weighted average remaining lease term (years)
Weighted average remaining lease term - finance leases	2 years 7 months 17 days	3 years 2 months 4 days
Weighted average remaining lease term - operating leases	6 years 1 month 28 days	7 years 29 days
Weighted average discount rate
Weighted average discount rate - finance leases (as a percent)	2.86%	3.02%
Weighted average discount rate - operating leases (as a percent)	3.15%	3.31%