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Revenue Recognition (Narrative) (Details) - USD ($)	3 Months Ended		6 Months Ended
Revenue Recognition (Narrative) (Details) - USD ($)	Jan. 31, 2025	Jan. 31, 2024	Jan. 31, 2025	Jan. 31, 2024	Jul. 31, 2024	Jul. 31, 2023
Concentration Risk [Line Items]
Unbilled receivables, not billable	$ 18,993,000		$ 18,993,000
Capitalized contract cost, impairment loss	0	$ 0
Contract liabilities	65,616,000		65,616,000		$ 65,834,000	$ 66,351,000
Revenue recognized			39,348,000	$ 30,057,000
Capitalized contract cost, amortization	789,000	$ 769,000	1,954,000	$ 1,252,000
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2024-05-01
Concentration Risk [Line Items]
Remaining performance obligations, amount	$ 763,801,000		$ 763,801,000
Remaining performance obligations, period	24 months		24 months