Goodwill and Intangible Assets, Net (Detail) - USD ($) $ in Thousands		12 Months Ended
		Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Finite-Lived Intangible Assets [Line Items]
Finite-Lived Intangible Assets/Contractual Rights		$ 1,745,376	$ 1,745,376
Accumulated Amortization		(1,528,089)	(1,460,992)
Intangible Assets, Net		217,287	284,384	$ 347,955	$ 397,508
Finite-lived Intangible Assets Acquired	[1]	0	11,300	$ 21,500
DCI acquisition [Member]
Finite-Lived Intangible Assets [Line Items]
Finite-lived Intangible Assets Acquired		$ 21,500	$ 11,300

[1] In December 2020, Blackstone acquired DCI, a San Francisco based systematic credit investment firm. Provisional amounts of Intangible Assets and Goodwill for the acquisition of DCI were reported for the year ended December 31, 2020, which resulted in a $21.5 million increase in Intangible Assets. During the year ended December 31, 2021, Blackstone obtained additional information needed to identify and measure the acquired assets, which resulted in a $11.3 million increase in Intangible Assets. Intangible Assets related to the DCI acquisition are primarily comprised of contractual rights to earn future fee income.