Fair Value Disclosures - Investments Measured at Fair Value Based on Net Asset Value Per Share (Detail) (USD $) In Thousands, unless otherwise specified			12 Months Ended	6 Months Ended	12 Months Ended	6 Months Ended	12 Months Ended	6 Months Ended	12 Months Ended	6 Months Ended	12 Months Ended	6 Months Ended	12 Months Ended	6 Months Ended
	Nov. 30, 2012 Predecessor [Member]	May 31, 2013 Successor [Member]	Nov. 30, 2012 Equity Long/Short Hedge Funds [Member] Predecessor [Member]	May 31, 2013 Equity Long/Short Hedge Funds [Member] Successor [Member]	Nov. 30, 2012 High Yield Hedge Funds [Member] Predecessor [Member]	May 31, 2013 High Yield Hedge Funds [Member] Successor [Member]	Nov. 30, 2012 Fund of Funds [Member] Predecessor [Member]	May 31, 2013 Fund of Funds [Member] Successor [Member]	Nov. 30, 2012 Equity Funds [Member] Predecessor [Member]	May 31, 2013 Equity Funds [Member] Successor [Member]	Nov. 30, 2012 Convertible Bond Funds [Member] Predecessor [Member]	May 31, 2013 Convertible Bond Funds [Member] Successor [Member]	Nov. 30, 2012 Other Investments [Member] Predecessor [Member]	May 31, 2013 Other Investments [Member] Successor [Member]
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share [Line Items]
Fair Value	$ 93,014	$ 89,728	$ 19,554	$ 20,074	$ 612	$ 315	$ 604	$ 433	$ 69,223	$ 65,851	$ 3,002	$ 3,038	$ 19	$ 17
Unfunded commitments	$ 59,378	$ 49,125					$ 106	$ 106	$ 59,272	$ 49,019
Redemption Frequency (if currently eligible)			Monthly, Quarterly	Monthly, Quarterly	-	-	-	-	-	-	At Will	At Will	Bi-Monthly	Bi-Monthly