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Changes in Accrued Warranty Balances (Detail) - USD ($)
$ in Thousands
3 Months Ended 6 Months Ended
Nov. 30, 2021
Nov. 30, 2020
Nov. 30, 2021
Nov. 30, 2020
Commitments and Contingencies Disclosure [Abstract]        
Beginning Balance $ 13,032 $ 12,836 $ 13,175 $ 11,106
Deductions [1] (5,424) (7,652) (11,682) (13,582)
Provision charged to expense 5,278 6,866 11,393 14,526
Ending Balance $ 12,886 $ 12,050 $ 12,886 $ 12,050
[1] Primarily claims paid during the year.