Noncontrolling Interests - Calculation of Noncontrolling Interests Attributable to Group A Units (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Noncontrolling Interest [Line Items]
Net Income (Loss)	$ 7,054	$ (24,284)	$ 21,075
Net Income (Loss) Attributable to Nonredeemable Noncontrolling Interest	(36,184)	(24,909)	131,630
Sculptor Capital LP
Noncontrolling Interest [Line Items]
Net Income (Loss)	$ (101,557)	$ (80,279)	$ (37,353)
Blended Participation Percentage	43.00%	57.00%	58.00%
Sculptor Advisors LP
Noncontrolling Interest [Line Items]
Net Income (Loss)	$ 37,667	$ 17,379	$ 89,395
Blended Participation Percentage	18.00%	56.00%	59.00%
Sculptor Advisors II LP
Noncontrolling Interest [Line Items]
Net Income (Loss)	$ 56,953	$ 18,510	$ 170,668
Blended Participation Percentage	0.00%	56.00%	59.00%
Sculptor Operating Group
Noncontrolling Interest [Line Items]
Net Income (Loss)	$ (6,937)	$ (44,390)	$ 222,710
Blended Participation Percentage		58.00%	59.00%
Group A Units
Noncontrolling Interest [Line Items]
Net Income (Loss) Attributable to Nonredeemable Noncontrolling Interest	(36,917)	$ (25,716)	$ 130,730
Group A Units | Sculptor Capital LP
Noncontrolling Interest [Line Items]
Net Income (Loss) Attributable to Nonredeemable Noncontrolling Interest	(43,612)	(45,833)	(21,765)
Group A Units | Sculptor Advisors LP
Noncontrolling Interest [Line Items]
Net Income (Loss) Attributable to Nonredeemable Noncontrolling Interest	6,695	9,670	52,344
Group A Units | Sculptor Advisors II LP
Noncontrolling Interest [Line Items]
Net Income (Loss) Attributable to Nonredeemable Noncontrolling Interest	0	10,447	100,151
Group A Units | Sculptor Operating Group
Noncontrolling Interest [Line Items]
Net Income (Loss) Attributable to Nonredeemable Noncontrolling Interest	$ (36,917)	$ (25,716)	$ 130,730