Earnings (Loss) Per Share - Schedule of Computation of Basic and Diluted Earnings Per Share (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended
	Mar. 31, 2025	Mar. 31, 2024
Earnings Per Share [Abstract]
Net Income (Loss)	$ 28,052	$ 37,867
Noncontrolling interests	595	(8,009)
Net Income (Loss) Attributable to Virtus Investment Partners, Inc.	$ 28,647	$ 29,858
Shares:
Basic: Weighted-average number of shares outstanding (in shares)	6,955	7,119
Plus: Incremental shares from assumed conversion of dilutive instruments (in shares)	118	168
Diluted: Weighted-average number of shares outstanding (in shares)	7,073	7,287
Earnings (Loss) per Share—Basic (in dollars per share)	$ 4.12	$ 4.19
Earnings (Loss) per Share—Diluted (in dollars per share)	$ 4.05	$ 4.10