Accumulated Other Comprehensive Loss, Net of Tax (Details) - USD ($) $ in Thousands	12 Months Ended
	Jul. 31, 2021	Jul. 31, 2020
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning balance	$ (66,477)	$ (71,254)
Other Comprehensive Income (Loss), before Reclassifications, Net of Tax	11,111	5,524
Amounts reclassified from accumulated other comprehensive loss	(587)	747
Ending balance	(55,953)	(66,477)
Unrealized gain (loss) on cash flow hedges [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning balance	(200)	707
Other Comprehensive Income (Loss), before Reclassifications, Net of Tax	1,228	(447)
Amounts reclassified from accumulated other comprehensive loss	(299)	460
Ending balance	729	(200)
Foreign currency translation adjustments [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning balance	(68,458)	(74,761)
Other Comprehensive Income (Loss), before Reclassifications, Net of Tax	9,888	6,303
Amounts reclassified from accumulated other comprehensive loss	0	0
Ending balance	(58,570)	(68,458)
Gain on post-retirement plans [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning balance	2,181	2,800
Other Comprehensive Income (Loss), before Reclassifications, Net of Tax	(5)	(332)
Amounts reclassified from accumulated other comprehensive loss	(288)	287
Ending balance	$ 1,888	$ 2,181