CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jan. 31, 2021	Jan. 31, 2020	Jan. 31, 2021	Jan. 31, 2020
Statement of Comprehensive Income [Abstract]
Net income	$ 30,860	$ 33,553	$ 64,341	$ 71,051
Foreign currency translation adjustments	19,074	(1,009)	14,882	(959)
Cash flow hedges:
Net gain recognized in other comprehensive income (loss)	451	363	1,148	559
Reclassification adjustment for losses (gains) included in net income	60	(105)	271	(486)
Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), after Reclassification, before Tax, Total	511	258	1,419	73
Pension and other post-retirement benefits:
Net loss recognized in other comprehensive income (loss)	(32)	(309)	(32)	(309)
Net actuarial gain amortization	(95)	(105)	(201)	(210)
Other Comprehensive (Income) Loss, Defined Benefit Plan, after Reclassification Adjustment, before Tax	(127)	(414)	(233)	(519)
Other comprehensive income (loss), before tax	19,458	(1,165)	16,068	(1,405)
Income tax (expense) benefit related to items of other comprehensive income	(1,251)	(42)	(1,052)	169
Other comprehensive income (loss), net of tax	18,207	(1,207)	15,016	(1,236)
Comprehensive Income [Member]
Pension and other post-retirement benefits:
Comprehensive income	$ 49,067	$ 32,346	$ 79,357	$ 69,815