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		6 Months Ended
	Jun. 30, 2025	Jun. 30, 2024	Jun. 30, 2025	Jun. 30, 2024
Earnings Per Share [Abstract]
Net Income (Loss)	$ 42,743	$ 26,022	$ 70,795	$ 63,889
Noncontrolling interests	(370)	(8,408)	225	(16,417)
Net Income (Loss) Attributable to Virtus Investment Partners, Inc.	$ 42,373	$ 17,614	$ 71,020	$ 47,472
Shares:
Basic: Weighted-average number of shares outstanding (in shares)	6,855	7,127	6,905	7,123
Plus: Incremental shares from assumed conversion of dilutive instruments (in shares)	67	115	92	141
Diluted: Weighted-average number of shares outstanding (in shares)	6,922	7,242	6,997	7,264
Earnings (Loss) per Share—Basic (in dollars per share)	$ 6.18	$ 2.47	$ 10.29	$ 6.66
Earnings (Loss) per Share—Diluted (in dollars per share)	$ 6.12	$ 2.43	$ 10.15	$ 6.54