Equity and Redeemable Non-controlling Interest - Summary of Non-controlling Interest Activity (Detail) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Redeemable Non-controlling Interest [Abstract]
Balance at the beginning of the year	$ 30,056
Settlement of performance participation allocation	192,648	$ 141,396
GAAP income allocation	(343)	(700)
Ending balance	32,222
Special Limited Partner [Member]
Redeemable Non-controlling Interest [Abstract]
Balance at the beginning of the year	274	272
Settlement of performance participation allocation	192,648	141,396
Repurchases	(111,949)	(83,625)
Conversion to Class I shares	(12,246)	(9,228)
GAAP income allocation		(20)
Distributions	(4)	(2)
Fair value allocation	14
Ending balance	284	250
Special Limited Partner [Member] | Common Class B [Member]
Redeemable Non-controlling Interest [Abstract]
Conversion to Class I shares	$ (68,453)	$ (48,543)