Provision for Income Taxes (Detail) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jan. 31, 2022	Jan. 31, 2021	Jan. 31, 2022	Jan. 31, 2021
Income Tax Disclosure [Abstract]
Effective income tax rate	23.30%	20.00%	22.60%	20.40%
Expected decrease in unrecognized tax benefits due to resolution of uncertain tax positions	$ 4,800		$ 4,800
Accrued interest	$ 1,000		$ 1,000