Performance Fees Allocated to Funds (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2014
Schedule of Performance Fees and Allocations to the General Partner [Line Items]
Performance Fees, December 31, 2013	$ 4,674,792
Performance Fees Allocated as a Result of Changes in Fund Fair Values	719,669
Foreign Exchange Gain	454
Fund Distributions	(415,462)
Performance Fees, March 31, 2014	4,979,453
Private Equity
Schedule of Performance Fees and Allocations to the General Partner [Line Items]
Performance Fees, December 31, 2013	971,860
Performance Fees Allocated as a Result of Changes in Fund Fair Values	286,726
Fund Distributions	(118,775)
Performance Fees, March 31, 2014	1,139,811
Real Estate
Schedule of Performance Fees and Allocations to the General Partner [Line Items]
Performance Fees, December 31, 2013	3,268,606
Performance Fees Allocated as a Result of Changes in Fund Fair Values	335,470
Foreign Exchange Gain	454
Fund Distributions	(209,887)
Performance Fees, March 31, 2014	3,394,643
Hedge Fund Solutions
Schedule of Performance Fees and Allocations to the General Partner [Line Items]
Performance Fees, December 31, 2013	9,468
Performance Fees Allocated as a Result of Changes in Fund Fair Values	23,259
Fund Distributions	(15,681)
Performance Fees, March 31, 2014	17,046
Credit
Schedule of Performance Fees and Allocations to the General Partner [Line Items]
Performance Fees, December 31, 2013	424,858
Performance Fees Allocated as a Result of Changes in Fund Fair Values	74,214
Fund Distributions	(71,119)
Performance Fees, March 31, 2014	$ 427,953