Fair Value Disclosures - Investments Measured at Fair Value Based on Net Asset Value Per Share (Detail) (USD $)
In Thousands, unless otherwise specified
9 Months Ended 12 Months Ended
Aug. 31, 2014
Nov. 30, 2013
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share [Line Items]    
Fair Value $ 112,818 $ 91,633
Unfunded Commitments 26,117 40,910
Equity Long/Short Hedge Funds [Member]
   
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share [Line Items]    
Fair Value 39,452 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 210 244
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 334 494
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 69,232 66,495
Unfunded Commitments 26,023 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 3,590 3,473
Unfunded Commitments      
Redemption Frequency (if currently eligible) At Will At Will