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Stock-Based Compensation - Summary of Stock Option Activity (Detail) - USD ($)
$ / shares in Units, shares in Thousands, $ in Thousands
12 Months Ended
May 31, 2022
May 31, 2021
May 31, 2020
Stock Options      
Outstanding, beginning of year 602 1,352 1,555
Granted 55 116 101
Exercised (53) (854) (303)
Forfeited (2) (12) (1)
Outstanding, end of year 602 602 1,352
Exercisable at end of year 447 389 1,167
Weighted Average Exercise Price      
Outstanding, beginning of year $ 36.44 $ 27.34 $ 24.01
Granted 60.19 36.93 38.91
Exercised 23.80 22.16 13.99
Forfeited 44.69 31.52 43.04
Outstanding, end of year 39.66 36.44 27.34
Exercisable at end of year $ 37.68 $ 35.55 $ 25.34
Weighted Average Remaining Contractual Life (in years)      
Outstanding 5 years 1 month 24 days 5 years 7 months 9 days 3 years 2 months 15 days
Exercisable 4 years 1 month 2 days 4 years 1 month 24 days 2 years 5 months 8 days
Aggregate intrinsic value      
Outstanding $ 4,987 $ 18,037 $ 8,846
Exercisable $ 4,065 $ 12,415 $ 8,846