Earnings (Loss) Per Share - Computation of Basic and Diluted Earnings per Share (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
Earnings Per Share [Abstract]
Net Income (Loss)	$ 34,643	$ 39,119
Noncontrolling interests	3,981	(6,060)
Net Income (Loss) Attributable to Virtus Investment Partners, Inc.	$ 38,624	$ 33,059
Shares:
Basic: Weighted-average number of common shares outstanding (in shares)	7,245	7,546
Plus: Incremental shares from assumed conversion of dilutive instruments (in shares)	165	293
Diluted: Weighted-average number of common shares outstanding (in shares)	7,410	7,839
Earnings (Loss) per Share—Basic (in dollars per share)	$ 5.33	$ 4.38
Earnings (Loss) per Share—Diluted (in dollars per share)	$ 5.21	$ 4.22