Operating Leases (Details) - USD ($) $ in Thousands	6 Months Ended
	Oct. 31, 2021	Apr. 30, 2021
ROU Assets and Lease Liabilities [Abstract]
Operating lease ROU assets	$ 121,708	$ 121,430
Short-term portion of operating lease liabilities	22,353	22,440
Operating lease liabilities, non-current	143,638	$ 145,832
Increase (decrease) in ROU assets due to new leases as well as modifications and remeasurements to existing operating leases	9,200
Increase (decrease) in operating lease liabilities due to new leases as well as modifications and remeasurements to existing operating leases	$ 9,100