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Summary of Significant Accounting Policies - Cash, Cash Equivalents, and Restricted Cash and Investments (Details) - USD ($) $ in Thousands	Jul. 31, 2024	Jul. 31, 2023
Accounting Policies [Abstract]
Amortized Cost	$ 1,908,047	$ 1,406,589
Gross Unrealized Gains	18,298	8,314
Fair Value	$ 1,926,345	$ 1,414,903

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Amount, after allowance for credit loss, of investment in debt security measured at amortized cost (held-to-maturity).

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