Fair Value of Financial Instruments (Details 2) - USD ($) $ in Thousands	Jul. 31, 2026	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	$ 579,122
12 Months or Greater	462,223
Total	1,041,345	$ 1,327,251
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	11,979
12 Months or Greater	99,769
Total	111,748	66,129
Commercial paper
SEC Schedule, 12-15, Insurance Companies, Summary of Investments, Other than Investments in Related Parties [Line Items]
Less Than 12 Months	44,986
12 Months or Greater	0
Total	44,986	130,628
Corporate bonds
SEC Schedule, 12-15, Insurance Companies, Summary of Investments, Other than Investments in Related Parties [Line Items]
Less Than 12 Months	235,937
12 Months or Greater	222,293
Total	458,230	425,198
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	35,468
12 Months or Greater	73,062
Total	108,530		$ 64,184
Asset-backed securities
SEC Schedule, 12-15, Insurance Companies, Summary of Investments, Other than Investments in Related Parties [Line Items]
Less Than 12 Months	15,753
12 Months or Greater	67,099
Total	82,852	69,457
Foreign government bonds
SEC Schedule, 12-15, Insurance Companies, Summary of Investments, Other than Investments in Related Parties [Line Items]
Total		1,831
Certificates of deposit
SEC Schedule, 12-15, Insurance Companies, Summary of Investments, Other than Investments in Related Parties [Line Items]
Less Than 12 Months	48,045
12 Months or Greater	0
Total	48,045	80,970
Money market funds
SEC Schedule, 12-15, Insurance Companies, Summary of Investments, Other than Investments in Related Parties [Line Items]
Less Than 12 Months	186,954
12 Months or Greater	0
Total	$ 186,954	$ 488,854