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Summary of Significant Accounting Policies - Investments in HTM Securities (Details) - USD ($) $ in Thousands	Apr. 30, 2024	Jul. 31, 2023
Accounting Policies [Abstract]
Amortized Cost	$ 2,000,334	$ 1,406,589
Gross Unrealized Gains	18,075	8,314
Fair Value	$ 2,018,409	$ 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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Amount of accumulated unrecognized gain on investment in debt security measured at amortized cost (held-to-maturity).

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Fair value of investment in debt security measured at amortized cost (held-to-maturity).

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