Intangible Assets (Intangible Assets with Finite Lives) (Details) - USD ($)	3 Months Ended		6 Months Ended		12 Months Ended
	Jan. 31, 2023	Jan. 31, 2022	Jan. 31, 2023	Jan. 31, 2022	Jul. 31, 2022
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	$ 449,933,000		$ 449,933,000		$ 449,933,000
Accumulated Amortization	213,328,000		213,328,000		202,630,000
Net Carrying Amount	236,605,000		236,605,000		$ 247,303,000
Amortization of intangibles	5,349,000	$ 5,349,000	$ 10,698,000	$ 10,698,000
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		$ 302,058,000
Accumulated Amortization	114,643,000		114,643,000		107,500,000
Net Carrying Amount	187,415,000		$ 187,415,000		$ 194,558,000
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		$ 114,949,000
Accumulated Amortization	78,235,000		78,235,000		75,798,000
Net Carrying Amount	36,714,000		$ 36,714,000		$ 39,151,000
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		$ 32,926,000
Accumulated Amortization	20,450,000		20,450,000		19,332,000
Net Carrying Amount	$ 12,476,000		$ 12,476,000		$ 13,594,000