Fair Value Disclosures - Investments Measured at Fair Value Based on Net Asset Value Per Share (Detail) (USD $) In Thousands, unless otherwise specified	6 Months Ended	12 Months Ended
	May 31, 2014	Nov. 30, 2013
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share [Line Items]
Fair Value	$ 111,629	$ 91,633
Unfunded commitments	27,503	40,910
Equity Long/Short Hedge Funds [Member]
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share [Line Items]
Fair Value	38,315	20,927
Unfunded commitments
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	232	244
Unfunded commitments
Redemption Frequency (if currently eligible)
Fund of Funds [Member]
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share [Line Items]
Fair Value	388	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	69,047	66,495
Unfunded commitments	27,409	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	3,647	3,473
Unfunded commitments
Redemption Frequency (if currently eligible)	At Will	At Will