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Operating Leases (Details) - USD ($)
$ in Thousands
 3 Months Ended
Jul. 31, 2021
Apr. 30, 2021
ROU Assets and Lease Liabilities [Abstract]    
Operating lease ROU assets $ 122,334 $ 121,430
Short-term portion of operating lease liabilities 21,547 22,440
Operating lease liabilities, non-current 145,340 $ 145,832
Increase (decrease) in ROU assets due to new leases as well as modifications and remeasurements to existing operating leases 5,000  
Increase (decrease) in operating lease liabilities due to new leases as well as modifications and remeasurements to existing operating leases $ 5,000