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, 2024	Mar. 31, 2023
Earnings Per Share [Abstract]
Net Income (Loss)	$ 37,867	$ 34,643
Noncontrolling interests	(8,009)	3,981
Net Income (Loss) Attributable to Virtus Investment Partners, Inc.	$ 29,858	$ 38,624
Shares:
Basic: Weighted-average number of shares outstanding (in shares)	7,119	7,245
Plus: Incremental shares from assumed conversion of dilutive instruments (in shares)	168	165
Diluted: Weighted-average number of shares outstanding (in shares)	7,287	7,410
Earnings (Loss) per Share—Basic (in dollars per share)	$ 4.19	$ 5.33
Earnings (Loss) per Share—Diluted (in dollars per share)	$ 4.10	$ 5.21