Commitments and Contingencies - Additional Information (Detail) - USD ($) $ in Millions	Aug. 31, 2026	Aug. 31, 2025
Standby Letters of Credit
Commitments and Contingencies Disclosure [Abstract]
Outstanding letters of credit	$ 3.9	$ 5.9
Loss Contingencies [Line Items]
Outstanding letters of credit	3.9	5.9
Surety Bond
Commitments and Contingencies Disclosure [Abstract]
Outstanding letters of credit	2.6	4.8
Loss Contingencies [Line Items]
Outstanding letters of credit	$ 2.6	$ 4.8