SEGMENT REPORTING (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019	Dec. 31, 2019
Segment Reporting Information [Line Items]
Net fee revenues from external sources	$ 17,053	$ 23,125
Net intersegment revenues	0	0
Net interest and dividend revenue	20	311
Other, net	(404)	426
Total revenues	16,669	23,862
Segment assets	157,802	181,149	$ 178,707
Goodwill	19,804	19,804	$ 19,804
Operating Segments | Advisory
Segment Reporting Information [Line Items]
Net fee revenues from external sources	11,102	16,586
Net intersegment revenues	624	1,016
Net interest and dividend revenue	20	225
Other, net	(404)	432
Total revenues	11,342	18,259
Segment assets	236,817	226,362
Goodwill	3,403	3,403
Operating Segments | Trust
Segment Reporting Information [Line Items]
Net fee revenues from external sources	5,951	6,539
Net intersegment revenues	50	71
Net interest and dividend revenue	0	86
Other, net	0	(6)
Total revenues	6,001	6,690
Segment assets	49,606	62,696
Goodwill	16,401	16,401
Westwood Holdings
Segment Reporting Information [Line Items]
Net fee revenues from external sources	0	0
Net intersegment revenues	0	0
Net interest and dividend revenue	0	0
Other, net	0	0
Total revenues	0	0
Segment assets	21,962	19,746
Goodwill	0	0
Eliminations
Segment Reporting Information [Line Items]
Net fee revenues from external sources	0	0
Net intersegment revenues	(674)	(1,087)
Net interest and dividend revenue	0	0
Other, net	0	0
Total revenues	(674)	(1,087)
Segment assets	(150,583)	(127,655)
Goodwill	$ 0	$ 0