Fair Value of Financial Instruments (Details 2) - USD ($) $ in Thousands	Jul. 31, 2025	Jul. 31, 2024
SEC Schedule, 12-15, Insurance Companies, Summary of Investments, Other than Investments in Related Parties [Line Items]
Less Than 12 Months	$ 993,497
12 Months or Greater	333,754
Estimated Fair Value	1,327,251	$ 980,498
U.S. Government agency securities
SEC Schedule, 12-15, Insurance Companies, Summary of Investments, Other than Investments in Related Parties [Line Items]
Less Than 12 Months	13,188
12 Months or Greater	52,941
Estimated Fair Value	66,129	33,499
Commercial paper
SEC Schedule, 12-15, Insurance Companies, Summary of Investments, Other than Investments in Related Parties [Line Items]
Less Than 12 Months	130,628
12 Months or Greater	0
Estimated Fair Value	130,628	138,598
Corporate bonds
SEC Schedule, 12-15, Insurance Companies, Summary of Investments, Other than Investments in Related Parties [Line Items]
Less Than 12 Months	220,890
12 Months or Greater	204,308
Estimated Fair Value	425,198	246,274
U.S. Government bonds
SEC Schedule, 12-15, Insurance Companies, Summary of Investments, Other than Investments in Related Parties [Line Items]
Less Than 12 Months	45,743
12 Months or Greater	18,441
Estimated Fair Value	64,184	89,883
Asset-backed securities
SEC Schedule, 12-15, Insurance Companies, Summary of Investments, Other than Investments in Related Parties [Line Items]
Less Than 12 Months	11,393
12 Months or Greater	58,064
Estimated Fair Value	69,457	58,867
Foreign government bonds
SEC Schedule, 12-15, Insurance Companies, Summary of Investments, Other than Investments in Related Parties [Line Items]
Less Than 12 Months	1,831
12 Months or Greater	0
Estimated Fair Value	1,831	5,596
Certificates of deposit
SEC Schedule, 12-15, Insurance Companies, Summary of Investments, Other than Investments in Related Parties [Line Items]
Less Than 12 Months	80,970
12 Months or Greater	0
Estimated Fair Value	80,970	46,900
Money market funds
SEC Schedule, 12-15, Insurance Companies, Summary of Investments, Other than Investments in Related Parties [Line Items]
Less Than 12 Months	488,854
12 Months or Greater	0
Estimated Fair Value	$ 488,854	$ 360,881

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