VARIABLE INTEREST ENTITIES (Details) - USD ($) $ in Thousands	Sep. 30, 2018	Dec. 31, 2017
Variable Interest Entities
Assets Under Management	$ 20,800,000
Estimated Market Value	71,003	$ 51,324
Westwood Funds®
Variable Interest Entities
Assets Under Management	4,031,000
Estimated Market Value	6,000
Amount at Risk	6,000
Common Trust Funds
Variable Interest Entities
Assets Under Management	2,079,000
Estimated Market Value	3,000
Amount at Risk	3,000
UCITS Fund
Variable Interest Entities
Assets Under Management	388,000
Estimated Market Value	0
Amount at Risk	0
Westwood Hospitality Fund I LLC [Member]
Variable Interest Entities
Assets Under Management	8,000
Estimated Market Value	0
Amount at Risk	0
Private Equity Investments [Member]
Variable Interest Entities
Assets Under Management	0
Estimated Market Value	5,000
Amount at Risk	5,000
Private Wealth
Variable Interest Entities
Assets Under Management	2,703,000
Institutional
Variable Interest Entities
Assets Under Management	$ 11,591,000