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Income Before Income Taxes (Detail) - USD ($)
$ in Thousands
12 Months Ended
May 31, 2022
May 31, 2021
May 31, 2020
Income Before Income Taxes [Line Items]      
Income Before Income Taxes $ 60,207 $ 75,268 $ 72,305
U.S.      
Income Before Income Taxes [Line Items]      
Income Before Income Taxes 38,554 55,753 62,329
Foreign      
Income Before Income Taxes [Line Items]      
Income Before Income Taxes $ 21,653 $ 19,515 $ 9,976