Earnings (Loss) Per Share - Schedule of Computation of Basic and Diluted Earnings Per Share (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Earnings Per Share [Abstract]
Net Income (Loss)	$ 262,835	$ 119,963	$ 105,508
Noncontrolling interests	(54,704)	(40,006)	(9,859)
Net Income (Loss) Attributable to Stockholders	208,131	79,957	95,649
Preferred stockholder dividends	0	0	(8,337)
Net Income (Loss) Attributable to Virtus Investment Partners, Inc.	$ 208,131	$ 79,957	$ 87,312
Weighted Average Number of Shares Outstanding, Diluted [Abstract]
Basic: Weighted-average number of shares outstanding (in shares)	7,672	7,620	6,963
Plus: Incremental shares from assumed conversion of dilutive instruments (in shares)	331	356	1,186
Weighted Average Shares Outstanding—Diluted (in shares)	8,003	7,976	8,149
Earnings per share—basic (in dollars per share)	$ 27.13	$ 10.49	$ 12.54
Earnings per share—diluted (in dollars per share)	$ 26.01	$ 10.02	$ 11.74