Fair Value Disclosures - Investments Measured at Fair Value Based on Net Asset Value Per Share (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended	12 Months Ended
	Feb. 28, 2014	Nov. 30, 2013
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share [Line Items]
Fair Value	$ 107,218	$ 91,633
Unfunded commitments	38,808	40,910
Equity Long/Short Hedge Funds [Member]
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share [Line Items]
Fair Value	37,078	20,927
Redemption Frequency (if currently eligible)	Monthly, Quarterly	Monthly, Quarterly
High Yield Hedge Funds [Member]
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share [Line Items]
Fair Value	244	244
Redemption Frequency (if currently eligible)	-	-
Fund of Funds [Member]
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share [Line Items]
Fair Value	315	494
Unfunded commitments	94	94
Redemption Frequency (if currently eligible)	-	-
Equity Funds [Member]
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share [Line Items]
Fair Value	65,878	66,495
Unfunded commitments	38,714	40,816
Redemption Frequency (if currently eligible)	-	-
Convertible Bond Funds [Member]
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share [Line Items]
Fair Value	$ 3,703	$ 3,473
Redemption Frequency (if currently eligible)	At Will	At Will