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Employee Stock Plans - Restricted Stock Activity (Detail) - Restricted stock
shares in Thousands
 6 Months Ended
Oct. 31, 2022
$ / shares
shares
Shares  
Beginning balance (in shares) | shares 1,980
Granted (in shares) | shares 1,116
Vested (in shares) | shares (997)
Forfeited/expired (in shares) | shares (27)
Ending balance (in shares) | shares 2,072
Weighted- Average Grant Date Fair Value  
Weighted-average, beginning balance (in usd per share) | $ / shares $ 40.32
Weighted-average, granted (in usd per share) | $ / shares 49.12
Weighted-average, vested (in usd per share) | $ / shares 37.66
Weighted-average, forfeited/expired (in usd per share) | $ / shares 55.15
Weighted-average, ending balance (in usd per share) | $ / shares $ 50.10