Provision for Income Taxes (Detail) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Apr. 30, 2021	Apr. 30, 2020	Apr. 30, 2021	Apr. 30, 2020
Income Tax Disclosure [Abstract]
Effective income tax rate	21.50%	(7.30%)	20.90%	18.50%
Expected decrease in unrecognized tax benefits due to resolution of uncertain tax positions	$ 7,900		$ 7,900
Accrued interest	$ 2,000		$ 2,000