Segment Information - Reconciliation of Och-Ziff Funds Segment Revenues to Consolidated Revenues (Detail) - USD ($) $ in Thousands		3 Months Ended
		Mar. 31, 2017	Mar. 31, 2016
Segment Reporting Information [Line Items]
Revenues		$ 139,152	$ 188,442
Income of consolidated Och-Ziff funds		(495)	(366)
Material Reconciling Items
Segment Reporting Information [Line Items]
Adjustment to management fees	[1]	(5,444)	(12,531)
Adjustment to incentive income	[2]	0	0
Other Operations revenues		(6,489)	(8,776)
Income of consolidated Och-Ziff funds		(495)	(366)
Operating Segments | Och-Ziff Funds Segment
Segment Reporting Information [Line Items]
Revenues		$ 126,724	$ 166,769

[1] Adjustment to present management fees net of recurring placement and related service fees, as management considers these fees a reduction in management fees, not an expense. The impact of eliminations related to the consolidated Och-Ziff funds is also removed.

[2] Adjustment to exclude the impact of eliminations related to the consolidated Och-Ziff funds.