Variable Interest Entities - Assets and Liabilities of Funds that are VIEs and Consolidated by Company (Detail) - USD ($) $ in Thousands	Mar. 31, 2017	Dec. 31, 2016
Assets of consolidated Och-Ziff funds:
Investments, at fair value	$ 35,996	$ 37,661
Other assets of Och-Ziff funds	21,314	17,544
Total Assets	1,306,549	1,485,555
Liabilities of consolidated Och-Ziff funds:
Other liabilities of Och-Ziff funds	16,658	15,197
Total Liabilities	1,148,593	1,495,526
Funds [Member] | Variable Interest Entity, Primary Beneficiary
Assets of consolidated Och-Ziff funds:
Investments, at fair value	35,996	37,661
Other assets of Och-Ziff funds	21,314	17,544
Total Assets	57,310	55,205
Liabilities of consolidated Och-Ziff funds:
Other liabilities of Och-Ziff funds	16,658	15,197
Total Liabilities	$ 16,658	$ 15,197