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Summary of Significant Accounting Policies - Cash, Cash Equivalents, and Restricted Cash and Investments (Details) - USD ($) $ in Thousands | Jul. 31, 2023 | Jul. 31, 2022
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Accounting Policies [Abstract] |  |
Amortized Cost | $ 1,406,589 | $ 0
Gross Unrealized Gains | 8,314 |
Fair Value | $ 1,414,903 | $ 0

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