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		12 Months Ended
		Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Schedule Of Equity Method Investments [Line Items]
Recurring fees		$ 266,615	$ 230,746	$ 195,513
Transactional fees		57,334	55,816	48,225
Promote revenue	[1]	165,635	116,290	127,519
Total strategic capital revenues from unconsolidated co-investment ventures	[2]	$ 489,584	$ 402,852	$ 371,257

[1] Includes promote revenue earned from unconsolidated co-investment ventures principally in Europe in 2019, China and Europe in 2018 and the U.S. in 2017.

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