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		6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022
Earnings Per Share [Abstract]
Net Income (Loss)	$ 30,180	$ 14,259	$ 64,823	$ 53,378
Noncontrolling interests	77	3,143	4,058	(2,917)
Net Income (Loss) Attributable to Virtus Investment Partners, Inc.	$ 30,257	$ 17,402	$ 68,881	$ 50,461
Shares:
Basic: Weighted-average number of common shares outstanding (in shares)	7,308	7,449	7,277	7,496
Plus: Incremental shares from assumed conversion of dilutive instruments (in shares)	77	158	121	225
Diluted: Weighted-average number of common shares outstanding (in shares)	7,385	7,607	7,398	7,721
Earnings (Loss) per Share—Basic (in dollars per share)	$ 4.14	$ 2.34	$ 9.47	$ 6.73
Earnings (Loss) per Share—Diluted (in dollars per share)	$ 4.10	$ 2.29	$ 9.31	$ 6.54