Fair Value Disclosures - Investments Measured at Fair Value Based on Net Asset Value Per Share (Details) - USD ($) $ in Thousands	3 Months Ended	9 Months Ended
	Aug. 31, 2022	Aug. 31, 2022	Nov. 30, 2021
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share [Line Items]
Fair Value	$ 1,299,523	$ 1,299,523	$ 1,012,322
Unfunded Commitments	103,223	103,223	46,683
Equity Long/Short Hedge Funds
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share [Line Items]
Fair Value	452,867	452,867	466,231
Unfunded Commitments	$ 0	$ 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	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	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]
Fair value, investments, entities that calculate net asset value per share, redemption restriction, percentage	57.00%	57.00%	74.00%
Equity Long/Short Hedge Funds | Debt Instrument, Redemption, Period Two
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share [Line Items]
Fair value, investments, entities that calculate net asset value per share, redemption restriction, percentage	37.00%	37.00%	21.00%
Equity Funds
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share [Line Items]
Fair Value	$ 61,825	$ 61,825	$ 32,412
Unfunded Commitments	$ 37,307	$ 37,307	10,593
Estimated period for the liquidation of the underlying assets, minimum	1 year	1 year
Expected period for the liquidation of the underlying assets, maximum	13 years	13 years
Commodity Funds
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share [Line Items]
Fair Value	$ 25,671	$ 25,671	24,401
Unfunded Commitments	$ 0	$ 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 period	60 days	60 days
Multi-asset Funds
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share [Line Items]
Fair Value	$ 406,183	$ 406,183	390,224
Unfunded Commitments	$ 0	$ 0	$ 0
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 period	90 days	90 days
Percentage of redeemable investments	17.00%	17.00%	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 period	60 days	60 days
Percentage of redeemable investments	76.00%	76.00%	78.00%
Other Funds
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share [Line Items]
Fair Value	$ 352,977	$ 352,977	$ 99,054
Unfunded Commitments	$ 65,916	$ 65,916	$ 36,090
Other 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	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