Segment Reporting (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013 Segment	Sep. 30, 2012	Dec. 31, 2012
Intersegment balances
Net revenues from external sources	$ 22,998	$ 18,941	$ 66,573	$ 56,871
Net intersegment revenues
Income before income taxes	6,766	4,331	19,218	14,167
Segment assets	104,926	91,943	104,926	91,943	96,615
Segment goodwill	11,255	11,255	11,255	11,255	11,255
Segment Reporting Information (Textual) [Abstract]
Number of operating segment			2
Operating Segments | Advisory [Member]
Intersegment balances
Net revenues from external sources	18,325	15,226	53,108	45,927
Net intersegment revenues	2,937	1,564	7,194	4,020
Income before income taxes	8,701	6,666	25,203	20,091
Segment assets	103,526	83,744	103,526	83,744
Segment goodwill	5,219	5,219	5,219	5,219
Operating Segments | Trust [Member]
Intersegment balances
Net revenues from external sources	4,673	3,715	13,465	10,944
Net intersegment revenues		3	9	12
Income before income taxes	771	551	2,072	1,712
Segment assets	13,849	13,932	13,849	13,932
Segment goodwill	6,036	6,036	6,036	6,036
Corporate, Non-Segment | Westwood Holdings [Member]
Intersegment balances
Net revenues from external sources
Net intersegment revenues
Income before income taxes	(2,706)	(2,886)	(8,057)	(7,636)
Segment assets	(12,449)	(5,733)	(12,449)	(5,733)
Segment goodwill
Intersegment Eliminations
Intersegment balances
Net revenues from external sources
Net intersegment revenues	(2,937)	(1,567)	(7,203)	(4,032)
Income before income taxes
Segment assets
Segment goodwill