Fair Value Disclosures - Investments Measured at Fair Value Based on Net Asset Value Per Share (Details) - USD ($) $ in Thousands	12 Months Ended
Nov. 30, 2022	Nov. 30, 2021
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share [Line Items]
Fair value	$ 1,293,964	$ 1,046,062
Unfunded Commitments	90,855	54,978
Equity long/short hedge funds
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share [Line Items]
Fair value	441,229	466,231
Unfunded Commitments	$ 0	$ 0
Percentage of investment at fair value, redemption restriction	34.00%	21.00%
Equity long/short hedge funds \| 90 Days prior written notice
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share [Line Items]
Percentage of investments redeemable	58.00%	74.00%
Notice period redemption of investment prior written notice	90 days
Equity long/short hedge funds \| Sixty Days Prior Written Notice
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share [Line Items]
Percentage of investments redeemable	6.00%	5.00%
Notice period redemption of investment prior written notice	60 days
Equity funds
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share [Line Items]
Fair value	$ 73,176	$ 66,152
Unfunded Commitments	$ 36,861	$ 18,888
Estimated period for the liquidation of the underlying assets, minimum	1 year	1 year
Estimated period for the liquidation of the underlying assets, maximum	12 years	12 years
Commodity funds
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share [Line Items]
Fair value	$ 24,283	$ 24,401
Unfunded Commitments	$ 0	$ 0
Commodity funds \| 60 Days prior written notice
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share [Line Items]
Notice period redemption of investment prior written notice	60 days	60 days
Multi-asset funds
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share [Line Items]
Fair value	$ 401,655	$ 390,224
Unfunded Commitments	$ 0	$ 0
Multi-asset funds \| 90 Days prior written notice
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share [Line Items]
Percentage of investments redeemable	15.00%	22.00%
Multi-asset funds \| 60 Days prior written notice
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share [Line Items]
Notice period redemption of investment prior written notice	60 days	60 days
Percentage of investments redeemable	78.00%	78.00%
Multi-asset funds \| 90 Days prior written notice
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share [Line Items]
Notice period redemption of investment prior written notice	90 days	90 days
Other funds
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share [Line Items]
Fair value	$ 353,621	$ 99,054
Unfunded Commitments	$ 53,994	$ 36,090
Short-term investments \| 90 Days prior written notice
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share [Line Items]
Notice period redemption of investment prior written notice	90 days	90 days
Short-term investments \| 120 Days prior written notice
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share [Line Items]
Notice period redemption of investment prior written notice	120 days	120 days

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Expected Period For Liquidation Of Underlying Assets Minimum

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Investments at fair value that cannot be redeemed at reporting date and are subject to a prior written redemption request.

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Percentage Of Investments Redeemable

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Investments redeemable within 60-90 days

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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.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 820
-SubTopic 10
-Section 50
-Paragraph 6A
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-URI https://asc.fasb.org/extlink&oid=126976982&loc=SL6742756-110258

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-Publisher FASB
-Name Accounting Standards Codification
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The percentage of the total value of investments that cannot be redeemed because of a redemption restriction as of the statement of financial position date.

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The amount of unfunded commitments for which the entity is obligated, to those certain investments for which net asset value per share is calculated (including by unit, membership interest, or other equity (ownership interest) unit measure) (alternative investments).

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Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 820
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-Paragraph 6A
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-URI https://asc.fasb.org/extlink&oid=126976982&loc=SL6742756-110258

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