Intangible Assets (Intangible Assets with Finite Lives) (Details) - USD ($)	12 Months Ended
	Jul. 31, 2022	Jul. 31, 2021	Jul. 31, 2020
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	$ 449,933,000	$ 449,933,000
Accumulated Amortization	202,630,000	181,234,000
Net Carrying Amount	247,303,000	268,699,000
Amortization of intangibles	$ 21,396,000	$ 21,020,000	$ 21,595,000
Customer relationships
Finite-Lived Intangible Assets [Line Items]
Weighted Average Amortization Period	20 years 2 months 12 days	20 years 2 months 12 days
Gross Carrying Amount	$ 302,058,000	$ 302,058,000
Accumulated Amortization	107,500,000	93,215,000
Net Carrying Amount	$ 194,558,000	$ 208,843,000
Technologies
Finite-Lived Intangible Assets [Line Items]
Weighted Average Amortization Period	14 years 9 months 18 days	14 years 9 months 18 days
Gross Carrying Amount	$ 114,949,000	$ 114,949,000
Accumulated Amortization	75,798,000	70,924,000
Net Carrying Amount	$ 39,151,000	$ 44,025,000
Trademarks and other
Finite-Lived Intangible Assets [Line Items]
Weighted Average Amortization Period	16 years 8 months 12 days	16 years 8 months 12 days
Gross Carrying Amount	$ 32,926,000	$ 32,926,000
Accumulated Amortization	19,332,000	17,095,000
Net Carrying Amount	$ 13,594,000	$ 15,831,000