VARIABLE INTEREST ENTITIES (Details Textual) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016	Dec. 31, 2016
Variable Interest Entity [Line Items]
Trading Securities	$ 48,093		$ 48,093		$ 56,485
Fee revenues from Westwood VIEs	13,200	$ 13,500	39,100	$ 39,500
VIE
Variable Interest Entity [Line Items]
Trading Securities	10,600		10,600		$ 11,000
Common Trust Funds
Variable Interest Entity [Line Items]
Trading Securities	2,000		2,000
UCITS Fund
Variable Interest Entity [Line Items]
Trading Securities	$ 2,000		$ 2,000