CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME - USD ($) $ in Thousands	3 Months Ended
	Oct. 31, 2020	Oct. 31, 2019
Statement of Comprehensive Income [Abstract]
Net income	$ 33,481	$ 37,498
Foreign currency translation adjustments:
Foreign currency translation adjustments	(4,192)	50
Cash flow hedges:
Reclassification adjustment for losses (gains) included in net income	211	(381)
Total cash flow hedges	908	(185)
Pension and other post-retirement benefits:
Pension and other post-retirement benefits actuarial gain amortization	(106)	(105)
Other comprehensive loss, before tax	(3,390)	(240)
Income tax benefit related to items of other comprehensive loss	199	211
Other comprehensive loss, net of tax	(3,191)	(29)
Comprehensive income	$ 30,290	$ 37,469