CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (LOSS) - USD ($) $ in Thousands	12 Months Ended
	Jul. 31, 2021	Jul. 31, 2020	Jul. 31, 2019
Statement of Comprehensive Income [Abstract]
Net income	$ 129,659	$ 112,369	$ 131,258
Other comprehensive income (loss):
Foreign currency translation adjustments	10,266	6,640	(13,223)
Cash flow hedges:
Net gain (loss) recognized in other comprehensive income (loss)	1,451	(576)	837
Reclassification adjustment for gains included in net income	(399)	(614)	(1,048)
Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), after Reclassification, before Tax, Total	1,052	(1,190)	(211)
Pension and other post-retirement benefits:
Net loss recognized in other comprehensive income (loss)	0	(468)	(97)
Net actuarial gain amortization	(388)	(380)	(569)
Other Comprehensive (Income) Loss, Pension and other Post-retirement Benefits, after Reclassification Adjustment, before Tax, total	(388)	(848)	(666)
Other comprehensive income (loss), before tax	10,930	4,602	(14,100)
Income tax (expense) benefit related to items of other comprehensive income (loss)	(406)	175	(753)
Other comprehensive income (loss), net of tax	10,524	4,777	(14,853)
Comprehensive income	$ 140,183	$ 117,146	$ 116,405