Accumulated Other Comprehensive Loss, Net of Tax (Details) - USD ($) $ in Thousands	9 Months Ended
	Apr. 30, 2022	Apr. 30, 2021
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning balance	$ (55,953)	$ (66,477)
Other comprehensive income (loss) before reclassification	(42,160)	18,014
Amounts reclassified from accumulated other comprehensive loss	(775)	(85)
Ending balance	(98,888)	(48,548)
Unrealized gain on cash flow hedges
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning balance	729	(200)
Other comprehensive income (loss) before reclassification	307	1,189
Amounts reclassified from accumulated other comprehensive loss	(486)	(16)
Ending balance	550	973
Unamortized gain on post-retirement plans
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning balance	1,888	2,181
Other comprehensive income (loss) before reclassification	(59)	(23)
Amounts reclassified from accumulated other comprehensive loss	(289)	(69)
Ending balance	1,540	2,089
Foreign currency translation adjustments
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning balance	(58,570)	(68,458)
Other comprehensive income (loss) before reclassification	(42,408)	16,848
Amounts reclassified from accumulated other comprehensive loss	0	0
Ending balance	$ (100,978)	$ (51,610)