CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME - USD ($) $ in Thousands	3 Months Ended
	Oct. 31, 2021	Oct. 31, 2020
Statement of Comprehensive Income [Abstract]
Net income	$ 35,046	$ 33,481
Other comprehensive loss:
Foreign currency translation adjustments	(3,918)	(4,192)
Cash flow hedges:
Net (loss) gain recognized in other comprehensive loss	(26)	697
Reclassification adjustment for (gains) losses included in net income	568	(211)
Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), after Reclassification, before Tax	(594)	908
Pension and other post-retirement benefits:
Pension and other post-retirement benefits actuarial gain amortization	(107)	(106)
Other comprehensive loss, before tax	(4,619)	(3,390)
Income tax (expense) benefit related to items of other comprehensive loss	(99)	199
Other comprehensive loss, net of tax	(4,718)	(3,191)
Comprehensive income	$ 30,328	$ 30,290