Summary of Fair Value by Strategy Type Alongside Consolidated Funds of Hedge Funds' Remaining Unfunded Commitments and Ability to Redeem Such Investments (Detail) $ in Thousands	Mar. 31, 2026 USD ($)
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share [Line Items]
Fair Value	$ 1,097,527
Unfunded Loan Commitment
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share [Line Items]
Fair Value	27,938
Equity
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share [Line Items]
Fair Value	97,069
Equity \| Unfunded Loan Commitment
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share [Line Items]
Fair Value	14,360
Real Estate
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share [Line Items]
Fair Value	26,334
Real Estate \| Unfunded Loan Commitment
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share [Line Items]
Fair Value	0
Infrastructure
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share [Line Items]
Fair Value	967,944
Infrastructure \| Unfunded Loan Commitment
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share [Line Items]
Fair Value	13,578
Other
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share [Line Items]
Fair Value	6,180
Other \| Unfunded Loan Commitment
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share [Line Items]
Fair Value	$ 0

Fair value of investment other than investment in equity security, investment in debt security and equity method investment. Includes, but is not limited to, investment in certain entities that calculate net asset value per share. Example includes, but is not limited to, investment in hedge fund, venture capital fund, private equity fund, and real estate partnership or fund.

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 820
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Reference 3: http://www.xbrl.org/2009/role/commonPracticeRef
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Reference 4: http://www.xbrl.org/2003/role/disclosureRef
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Reference 5: http://www.xbrl.org/2003/role/disclosureRef
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Reference 6: http://www.xbrl.org/2003/role/disclosureRef
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Reference 7: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 820
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Reference 8: http://www.xbrl.org/2003/role/exampleRef
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Reference 10: http://www.xbrl.org/2003/role/exampleRef
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Reference 11: http://www.xbrl.org/2003/role/disclosureRef
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Reference 12: http://www.xbrl.org/2003/role/disclosureRef
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+ Details

- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References + Details