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, 2026	Jun. 30, 2025	Jun. 30, 2026	Jun. 30, 2025
Earnings Per Share [Abstract]
Net Income (Loss)	$ 44,607	$ 42,743	$ 50,758	$ 70,795
Noncontrolling interests	699	(370)	1,673	225
Net Income (Loss) Attributable to Virtus Investment Partners, Inc.	$ 45,306	$ 42,373	$ 52,431	$ 71,020
Shares:
Basic: Weighted-average number of shares outstanding (in shares)	6,670	6,855	6,680	6,905
Plus: Incremental shares from assumed conversion of dilutive instruments (in shares)	108	67	112	92
Diluted: Weighted-average number of shares outstanding (in shares)	6,778	6,922	6,792	6,997
Earnings (Loss) per Share—Basic (in dollars per share)	$ 6.79	$ 6.18	$ 7.85	$ 10.29
Earnings (Loss) per Share—Diluted (in dollars per share)	$ 6.68	$ 6.12	$ 7.72	$ 10.15