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Summary of Significant Accounting Policies - Schedule of Investments in Held to Maturity Securities (Details) - USD ($) $ in Thousands | Apr. 30, 2026 | Jul. 31, 2025
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Accounting Policies [Abstract] |  |
Amortized Cost | $ 845,570 | $ 2,008,539
Gross Unrealized Gains | 878 | 15,575
Investment in held to maturity securities, fair value | $ 846,448 | $ 2,024,114

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