Condensed Consolidated Statements of Changes in Stockholders' Equity - USD ($) $ in Thousands	Total	Total Attributed To Virtus Investment Partners, Inc.	Common Stock	Additional Paid-in Capital	Retained Earnings (Accumulated Deficit)	Accumulated Other Comprehensive Income (Loss)	Treasury Stock	Non- controlling Interests
Beginning Balance (in shares) at Dec. 31, 2020			7,583,466				4,207,403
Beginning Balance at Dec. 31, 2020	$ 720,940	$ 711,141	$ 118	$ 1,298,002	$ (135,259)	$ 29	$ (451,749)	$ 9,799
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)	36,663	36,588			36,588			75
Foreign currency translation adjustments	6	6				6
Net subscriptions (redemptions) and other	(557)							(557)
Cash dividends declared	(6,696)	(6,696)		(6,696)
Repurchases of common shares (in shares)			(19,912)				19,912
Repurchases of common shares	(4,999)	(4,999)					$ (4,999)
Issuance of common shares related to employee stock transactions (in shares)			86,125
Issuance of common shares related to employee stock transactions	66	66	$ 1	65
Taxes paid on stock-based compensation	(15,163)	(15,163)		(15,163)
Stock-based compensation	8,435	8,435		8,435
Ending Balance (in shares) at Mar. 31, 2021			7,649,679				4,227,315
Ending Balance at Mar. 31, 2021	738,695	729,378	$ 119	1,284,643	(98,671)	35	$ (456,748)	9,317
Beginning Balance at Dec. 31, 2020	115,513
Increase (Decrease) in Redeemable Non-controlling Interests [Roll Forward]
Total net income (loss) attributable to noncontrolling interests	15,551
Net subscriptions (redemptions) and other	(18,582)
Ending Balance at Mar. 31, 2021	112,482
Beginning Balance (in shares) at Dec. 31, 2021			7,506,151				4,400,596
Beginning Balance at Dec. 31, 2021	836,627	828,277	$ 119	1,276,424	60,962	20	$ (509,248)	8,350
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)	33,002	33,059			33,059			(57)
Foreign currency translation adjustments	(50)	(50)				(50)
Net subscriptions (redemptions) and other	(487)							(487)
Cash dividends declared	$ (12,238)	(12,238)			(12,238)
Repurchases of common shares (in shares)	(125,452)		(125,452)				125,452
Repurchases of common shares	$ (30,000)	(30,000)					$ (30,000)
Issuance of common shares related to employee stock transactions (in shares)			92,130
Issuance of common shares related to employee stock transactions	0	0	$ 1	(1)
Taxes paid on stock-based compensation	(13,414)	(13,414)		(13,414)
Stock-based compensation	10,793	10,793		10,793
Ending Balance (in shares) at Mar. 31, 2022			7,472,829				4,526,048
Ending Balance at Mar. 31, 2022	824,233	$ 816,427	$ 120	$ 1,273,802	$ 81,783	$ (30)	$ (539,248)	$ 7,806
Beginning Balance at Dec. 31, 2021	138,965
Increase (Decrease) in Redeemable Non-controlling Interests [Roll Forward]
Total net income (loss) attributable to noncontrolling interests	6,117
Net subscriptions (redemptions) and other	(6,344)
Ending Balance at Mar. 31, 2022	$ 138,738