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		9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023
Earnings Per Share [Abstract]
Net Income (Loss)	$ 49,104	$ 38,154	$ 112,993	$ 102,977
Noncontrolling interests	(8,124)	(7,248)	(24,541)	(3,190)
Net Income (Loss) Attributable to Virtus Investment Partners, Inc.	$ 40,980	$ 30,906	$ 88,452	$ 99,787
Shares:
Basic: Weighted-average number of shares outstanding (in shares)	7,071	7,258	7,105	7,272
Plus: Incremental shares from assumed conversion of dilutive instruments (in shares)	105	121	129	121
Diluted: Weighted-average number of shares outstanding (in shares)	7,176	7,379	7,234	7,393
Earnings (Loss) per Share—Basic (in dollars per share)	$ 5.80	$ 4.26	$ 12.45	$ 13.72
Earnings (Loss) per Share—Diluted (in dollars per share)	$ 5.71	$ 4.19	$ 12.23	$ 13.50