Intangible Assets (Intangible Assets with Finite Lives) (Details) - USD ($)	3 Months Ended		6 Months Ended		12 Months Ended
	Jan. 31, 2025	Jan. 31, 2024	Jan. 31, 2025	Jan. 31, 2024	Jul. 31, 2024
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	$ 432,233,000		$ 432,233,000		$ 448,133,000
Accumulated Amortization	249,041,000		249,041,000		253,305,000
Net Carrying Amount	183,192,000		183,192,000		$ 194,828,000
Amortization of intangibles	5,043,000	$ 5,288,000	11,636,000	$ 10,577,000
CGC Technology Limited
Finite-Lived Intangible Assets [Line Items]
Amortization of intangibles			$ 1,343,000
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	294,258,000		$ 294,258,000		$ 302,058,000
Accumulated Amortization	141,733,000		141,733,000		141,601,000
Net Carrying Amount	152,525,000		$ 152,525,000		$ 160,457,000
Technologies
Finite-Lived Intangible Assets [Line Items]
Weighted Average Amortization Period			13 years 7 months 6 days		14 years 9 months 18 days
Gross Carrying Amount	106,149,000		$ 106,149,000		$ 113,149,000
Accumulated Amortization	83,490,000		83,490,000		87,809,000
Net Carrying Amount	22,659,000		$ 22,659,000		$ 25,340,000
Trademarks and other
Finite-Lived Intangible Assets [Line Items]
Weighted Average Amortization Period			16 years 10 months 24 days		16 years 8 months 12 days
Gross Carrying Amount	31,826,000		$ 31,826,000		$ 32,926,000
Accumulated Amortization	23,818,000		23,818,000		23,895,000
Net Carrying Amount	$ 8,008,000		$ 8,008,000		$ 9,031,000