Unconsolidated Entities - Summary of Strategic Capital Revenues Recognized in Consolidated Statements of Income Related to Co-Investment Ventures (Detail) - Unconsolidated Co-Investment Ventures [Member] - USD ($) $ in Thousands		3 Months Ended		9 Months Ended
		Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Schedule Of Equity Method Investments [Line Items]
Recurring fees		$ 80,403	$ 67,888	$ 231,263	$ 195,542
Transactional fees		15,827	14,094	47,879	41,272
Promote revenue	[1]	0	148,191	228,421	155,474
Total strategic capital revenues from unconsolidated co-investment ventures	[2]	$ 96,230	$ 230,173	$ 507,563	$ 392,288

[1] Includes promote revenue earned from our unconsolidated co-investment venture in the U.S. in June 2020 and in Europe in September 2019

[2] These amounts exclude strategic capital revenues from other ventures.