Performance Fees Allocated to Funds (Detail) $ in Thousands	3 Months Ended
	Mar. 31, 2016 USD ($)
Schedule of Performance Fees and Allocations to the General Partner [Line Items]
Performance Fees, December 31, 2015	$ 4,757,932
Performance Fees Allocated as a Result of Changes in Fund Fair Values	283,549
Foreign Exchange Gain	18,631
Fund Distributions	(278,066)
Performance Fees, March 31, 2016	4,782,046
Private Equity Segment
Schedule of Performance Fees and Allocations to the General Partner [Line Items]
Performance Fees, December 31, 2015	1,479,443
Performance Fees Allocated as a Result of Changes in Fund Fair Values	104,602
Fund Distributions	(29,345)
Performance Fees, March 31, 2016	1,554,700
Real Estate Segment
Schedule of Performance Fees and Allocations to the General Partner [Line Items]
Performance Fees, December 31, 2015	3,101,688
Performance Fees Allocated as a Result of Changes in Fund Fair Values	179,842
Foreign Exchange Gain	18,631
Fund Distributions	(222,978)
Performance Fees, March 31, 2016	3,077,183
Hedge Fund Solutions Segment
Schedule of Performance Fees and Allocations to the General Partner [Line Items]
Performance Fees, December 31, 2015	9,747
Performance Fees Allocated as a Result of Changes in Fund Fair Values	(891)
Fund Distributions	(6,363)
Performance Fees, March 31, 2016	2,493
Credit Segment
Schedule of Performance Fees and Allocations to the General Partner [Line Items]
Performance Fees, December 31, 2015	167,054
Performance Fees Allocated as a Result of Changes in Fund Fair Values	(4)
Fund Distributions	(19,380)
Performance Fees, March 31, 2016	$ 147,670