Financial Instruments (Details 1) (USD $) In Thousands, unless otherwise specified	11 Months Ended	12 Months Ended
	Nov. 30, 2010	Nov. 30, 2011
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share [Line Items]
Fair Value	$ 50,902	$ 120,454
Unfunded Commitments	87,922	74,409
Equity Long/Short Hedge Funds [Member]
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share [Line Items]
Fair Value	80,837	27,604
Unfunded Commitments	0	0
Redemption Frequency (if currently eligible)	Quarterly, Semiannually	Monthly, Quarterly, Semiannually
High Yield Hedge Funds [Member]
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share [Line Items]
Fair Value	1,561	938
Unfunded Commitments	0	0
Fund of Funds [Member]
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share [Line Items]
Fair Value	2,622	772
Unfunded Commitments	131	126
Redemption Frequency (if currently eligible)	Annually
Equity Funds [Member]
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share [Line Items]
Fair Value	73,162	88,294
Unfunded Commitments	87,791	74,283
Convertible Bond Funds [Member]
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share [Line Items]
Fair Value	18,070	2,827
Unfunded Commitments	0	0
Redemption Frequency (if currently eligible)	At Will	At Will
Commodity Funds [Member]
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share [Line Items]
Fair Value	5,948
Unfunded Commitments	0
Redemption Frequency (if currently eligible)	At Will
Other Investments [Member]
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share [Line Items]
Fair Value	287	19
Unfunded Commitments	$ 0	$ 0
Redemption Frequency (if currently eligible)	At Will	Bi-Monthly