Document and Entity Information - shares	3 Months Ended
	Mar. 31, 2020	Apr. 22, 2020
Document And Entity Information [Abstract]
Document Transition Report	false
Document Quarterly Report	true
Entity Incorporation, State or Country Code	DE
Entity Tax Identification Number	75-2969997
Entity Address, Address Line One	200 CRESCENT COURT, SUITE 1200
Title of 12(b) Security	Common stock, par value $0.01 per share
Entity Registrant Name	WESTWOOD HOLDINGS GROUP, INC.
City Area Code	214
Local Phone Number	756-6900
Entity Central Index Key	0001165002
Document Type	10-Q
Document Period End Date	Mar. 31, 2020
Entity File Number	1-31234
Amendment Flag	false
Document Fiscal Year Focus	2020
Document Fiscal Period Focus	Q1
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Shell Company	true
Current Fiscal Year End Date	--12-31
Entity Filer Category	Accelerated Filer
Entity Common Stock, Shares Outstanding		8,500,061
Entity Emerging Growth Company	false
Entity Small Business	false
Trading Symbol	WHG
Security Exchange Name	NYSE
Entity Address, City or Town	DALLAS,
Entity Address, State or Province	TX
Entity Address, Postal Zip Code	75201