Variable Interest Entities (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Variable Interest Entities
Assets Under Management	$ 14,779,000
Corporate Investment	15,342	$ 65,024
Fee revenues from Westwood VIEs	23,200	$ 22,800	$ 19,300
Westwood Funds
Variable Interest Entities
Assets Under Management	4,328,000
Corporate Investment	0
Amount at Risk	0
Common Trust Funds
Variable Interest Entities
Assets Under Management	715,000
Corporate Investment	0
Amount at Risk	0
Westwood Hospitality Fund I LLC [Member]
Variable Interest Entities
Assets Under Management	11,000
Corporate Investment	300
Amount at Risk	300
Private Equity Investments [Member]
Variable Interest Entities
Assets Under Management	0
Corporate Investment	7,200
Amount at Risk	7,200
Wealth Management
Variable Interest Entities
Assets Under Management	2,940,000
Institutional
Variable Interest Entities
Assets Under Management	$ 6,785,000