Investment Valuation and Fair Value Measurements - Summary of Reconciliation Of The Funds Level 3 Investments For Which Significant Unobservable Inputs Were Used In Determining Fair Value (Detail) - USD ($) $ in Thousands |
3 Months Ended | 9 Months Ended | ||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Sep. 30, 2026 |
Mar. 31, 2026 |
Sep. 30, 2025 |
Mar. 31, 2025 |
Sep. 30, 2026 |
Sep. 30, 2025 |
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| Investment Valuation and Fair Value Measurements [Abstract] | ||||||||||||||
| Balance, beginning of period | $ 1,604,751 | $ 980,481 | $ 388,044 | $ 0 | $ 980,481 | $ 0 | ||||||||
| Purchases | 16,743 | 332,564 | 598,908 | 673,417 | ||||||||||
| Sales | 0 | 0 | 0 | 0 | ||||||||||
| Net realized gain | 0 | 0 | 0 | 0 | ||||||||||
| Net change in unrealized appreciation (depreciation) | 59,746 | [1] | (17,691) | 66,526 | [1] | 0 | 101,851 | [1] | 113,717 | [2] | ||||
| Balance, end of period | 1,681,240 | 787,134 | 1,681,240 | 787,134 | ||||||||||
| Net change in unrealized appreciation (depreciation) on investments | $ 59,746 | [1] | $ (17,691) | $ 66,526 | [1] | $ 0 | $ 101,851 | [1] | $ 113,717 | [2] | ||||
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