Variable Interest Entities (Details Textual) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Variable Interest Entity [Line Items]
Investments in trading securities	$ 25,748	$ 32,674
Fee revenues from Westwood VIEs	33,000	$ 32,400	$ 23,200
Common Trust Funds
Variable Interest Entity [Line Items]
Investments in trading securities	$ 0