VARIABLE INTEREST ENTITIES (Details) - USD ($) $ in Thousands	Mar. 31, 2020	Dec. 31, 2019
Variable Interest Entities
Assets Under Management	$ 11,600,000
Estimated Fair Value	40,515	$ 54,562
Variable Interest Entity, Consolidated, Assets, Noncurrent	4,400	$ 6,400
Westwood Funds®
Variable Interest Entities
Assets Under Management	1,500,000
Estimated Fair Value	4,400
Amount at Risk	4,400
Common Trust Funds
Variable Interest Entities
Assets Under Management	1,089,000
Estimated Fair Value	0
Amount at Risk	0
UCITS Fund
Variable Interest Entities
Assets Under Management	230,000
Estimated Fair Value	0
Amount at Risk	0
Westwood Hospitality Fund I LLC [Member]
Variable Interest Entities
Assets Under Management	13,000
Estimated Fair Value	300
Amount at Risk	300
Private equity
Variable Interest Entities
Assets Under Management	0
Estimated Fair Value	11,100
Amount at Risk	11,100
Wealth Management
Variable Interest Entities
Assets Under Management	2,663,000
Institutional
Variable Interest Entities
Assets Under Management	$ 6,105,000