Fair Value Disclosures - Investments Measured at Fair Value Based on Net Asset Value Per Share (Details) - USD ($) $ in Thousands	3 Months Ended	6 Months Ended	12 Months Ended
	Feb. 29, 2024	May 31, 2024	Nov. 30, 2023
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share [Line Items]
Fair Value		$ 1,287,001	$ 1,209,383
Unfunded Commitments		139,547	170,196
Equity Long/Short Hedge Funds
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share [Line Items]
Fair Value		364,534	341,530
Unfunded Commitments		$ 0	$ 0
Equity Long/Short Hedge 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 period	90 days
Equity Long/Short Hedge 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 period	60 days
Equity Long/Short Hedge Funds | Debt Instrument, Redemption, Period One
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share [Line Items]
Percentage of redeemable investments			57.00%
Percentage of not redeemable investments			43.00%
Equity Long/Short Hedge Funds | Debt Instrument, Redemption, Period One | 90 Days Prior Written Notice
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share [Line Items]
Percentage of redeemable investments		71.00%
Notice period redemption of investment prior written notice period		90 days
Equity Long/Short Hedge Funds | Debt Instrument, Redemption, Period One | 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 period		60 days
Equity Long/Short Hedge Funds | Debt Instrument, Redemption, Period Two | 60 Days Prior Written Notice
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share [Line Items]
Percentage of redeemable investments		29.00%
Notice period redemption of investment prior written notice period		60 days
Equity Funds
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share [Line Items]
Fair Value		$ 55,959	$ 55,701
Unfunded Commitments		$ 31,406	$ 37,534
Percentage of not redeemable investments		100.00%	100.00%
Estimated period for the liquidation of the underlying assets, minimum		1 year	1 year
Expected period for the liquidation of the underlying assets, maximum		11 years	11 years
Commodity Funds
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share [Line Items]
Fair Value		$ 23,373	$ 21,747
Unfunded Commitments		$ 0	$ 0
Commodity Funds | 90 Days Prior Written Notice
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share [Line Items]
Percentage of redeemable investments			100.00%
Commodity Funds | 60 Days Prior Written Notice
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share [Line Items]
Percentage of redeemable investments		100.00%
Notice period redemption of investment prior written notice period	60 days	60 days
Multi-asset Funds
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share [Line Items]
Fair Value		$ 369,641	$ 357,445
Unfunded Commitments		$ 0	$ 0
Percentage of not redeemable investments			4.00%
Multi-asset Funds | 90 Days Prior Written Notice
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share [Line Items]
Percentage of redeemable investments			13.00%
Notice period redemption of investment prior written notice period	90 days
Multi-asset Funds | 60 Days Prior Written Notice
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share [Line Items]
Percentage of redeemable investments			83.00%
Notice period redemption of investment prior written notice period	60 days
Multi-asset Funds | Debt Instrument, Redemption, Period One | 60 Days Prior Written Notice
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share [Line Items]
Percentage of redeemable investments		87.00%
Notice period redemption of investment prior written notice period		60 days
Multi-asset Funds | Debt Instrument, Redemption, Period One | 45 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 period		45 days
Multi-asset Funds | Debt Instrument, Redemption, Period Two | 90 Days Prior Written Notice
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share [Line Items]
Percentage of redeemable investments		13.00%
Notice period redemption of investment prior written notice period		90 days
Other Funds
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share [Line Items]
Fair Value		$ 473,494	$ 432,960
Unfunded Commitments		$ 108,141	$ 132,662
Percentage of not redeemable investments		29.00%	25.00%
Other Funds | 90 Days Prior Written Notice
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share [Line Items]
Percentage of redeemable investments		71.00%	75.00%
Notice period redemption of investment prior written notice period	90 days	90 days
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 period		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 period		120 days	120 days