Accumulated Other Comprehensive Income, Tax (Detail) - USD ($) $ in Thousands	3 Months Ended
	Oct. 31, 2021	Oct. 31, 2020
Other Comprehensive Income (Loss), Tax [Abstract]
Cash flow hedges	$ 104	$ 48
Pension and other post-retirement benefits	0	240
Other income tax adjustments and currency translation	5	7
Income tax (expense) benefit related to items of other comprehensive loss	$ (99)	$ 199