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Provision for Income Taxes (Detail) - USD ($)
$ in Thousands
12 Months Ended
May 31, 2020
May 31, 2019
May 31, 2018
Current:      
Federal $ 6,886 $ 7,173 $ 9,715
Uncertain tax provision 269 13 (963)
State 1,262 1,265 1,377
Foreign 2,475 3,758 3,066
Deferred:      
Federal 1,964 1,031 (1,981)
State 195 98 (355)
Foreign (221) (555) (609)
Provision for Income Taxes $ 12,830 $ 12,783 $ 10,250