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
Balance at beginning of period, common stock (in shares) at Dec. 31, 2020			7,583,466
Balance at beginning of period at Dec. 31, 2020	$ 720,940	$ 711,141	$ 118	$ 1,298,002	$ (135,259)	$ 29	$ (451,749)	$ 9,799
Balance at beginning of period, treasury stock (in shares) at Dec. 31, 2020							4,207,403
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)	99,900	99,555			99,555			345
Foreign currency translation adjustments	6	6				6
Net subscriptions (redemptions) and other	(1,176)							(1,176)
Cash dividends declared	(13,300)	(13,300)		(13,300)
Repurchases of common shares (in shares)			(46,833)				46,833
Repurchases of common shares	(12,499)	(12,499)					$ (12,499)
Issuance of common shares related to employee stock transactions (in shares)			114,973
Issuance of common shares related to employee stock transactions	66	66	$ 1	65
Taxes paid on stock-based compensation	(19,280)	(19,280)		(19,280)
Stock-based compensation	15,180	15,180		15,180
Balance at end of period, common stock (in shares) at Jun. 30, 2021			7,651,606
Balance at end of period at Jun. 30, 2021	789,837	780,869	$ 119	1,280,667	(35,704)	35	$ (464,248)	8,968
Balance at end of period, treasury stock (in shares) at Jun. 30, 2021							4,254,236
Balance at beginning of period at Dec. 31, 2020	115,513
Increase (Decrease) in Redeemable Non-controlling Interests [Roll Forward]
Total net income (loss) attributable to noncontrolling interests	28,411
Net subscriptions (redemptions) and other	(12,399)
Balance at end of period at Jun. 30, 2021	131,525
Balance at beginning of period, common stock (in shares) at Mar. 31, 2021			7,649,679
Balance at beginning of period at Mar. 31, 2021	738,695	729,378	$ 119	1,284,643	(98,671)	35	$ (456,748)	9,317
Balance at beginning of period, treasury stock (in shares) at Mar. 31, 2021							4,227,315
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)	63,237	62,967			62,967			270
Foreign currency translation adjustments	0	0
Net subscriptions (redemptions) and other	(619)	0						(619)
Cash dividends declared	(6,604)	(6,604)		(6,604)
Repurchases of common shares (in shares)			(26,921)				26,921
Repurchases of common shares	(7,500)	(7,500)					$ (7,500)
Issuance of common shares related to employee stock transactions (in shares)			28,848
Issuance of common shares related to employee stock transactions	0	0
Taxes paid on stock-based compensation	(4,117)	(4,117)		(4,117)
Stock-based compensation	6,745	6,745		6,745
Balance at end of period, common stock (in shares) at Jun. 30, 2021			7,651,606
Balance at end of period at Jun. 30, 2021	789,837	780,869	$ 119	1,280,667	(35,704)	35	$ (464,248)	8,968
Balance at end of period, treasury stock (in shares) at Jun. 30, 2021							4,254,236
Balance at beginning of period at Mar. 31, 2021	112,482
Increase (Decrease) in Redeemable Non-controlling Interests [Roll Forward]
Total net income (loss) attributable to noncontrolling interests	12,860
Net subscriptions (redemptions) and other	6,183
Balance at end of period at Jun. 30, 2021	$ 131,525
Balance at beginning of period, common stock (in shares) at Dec. 31, 2021	11,906,747		7,506,151
Balance at beginning of period at Dec. 31, 2021	$ 836,627	828,277	$ 119	1,276,424	60,962	20	$ (509,248)	8,350
Balance at beginning of period, treasury stock (in shares) at Dec. 31, 2021	4,400,596						4,400,596
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)	$ 50,126	50,461			50,461			(335)
Foreign currency translation adjustments	(287)	(287)				(287)
Net subscriptions (redemptions) and other	(1,018)							(1,018)
Cash dividends declared	$ (23,227)	(23,227)			(23,227)
Repurchases of common shares (in shares)	(347,355)		(347,355)				347,355
Repurchases of common shares	$ (70,000)	(70,000)					$ (70,000)
Issuance of common shares related to employee stock transactions (in shares)			116,541
Issuance of common shares related to employee stock transactions	0	0	$ 1	(1)
Taxes paid on stock-based compensation	(15,284)	(15,284)		(15,284)
Stock-based compensation	$ 14,768	14,768		14,768
Balance at end of period, common stock (in shares) at Jun. 30, 2022	12,023,288		7,275,337
Balance at end of period at Jun. 30, 2022	$ 791,705	784,708	$ 120	1,275,907	88,196	(267)	$ (579,248)	6,997
Balance at end of period, treasury stock (in shares) at Jun. 30, 2022	4,747,951						4,747,951
Balance at beginning of period at Dec. 31, 2021	$ 138,965
Increase (Decrease) in Redeemable Non-controlling Interests [Roll Forward]
Total net income (loss) attributable to noncontrolling interests	3,252
Net subscriptions (redemptions) and other	(3,070)
Balance at end of period at Jun. 30, 2022	139,147
Balance at beginning of period, common stock (in shares) at Mar. 31, 2022			7,472,829
Balance at beginning of period at Mar. 31, 2022	824,233	816,427	$ 120	1,273,802	81,783	(30)	$ (539,248)	7,806
Balance at beginning of period, treasury stock (in shares) at Mar. 31, 2022							4,526,048
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)	17,124	17,402			17,402			(278)
Foreign currency translation adjustments	(237)	(237)				(237)
Net subscriptions (redemptions) and other	(531)	0						(531)
Cash dividends declared	$ (10,989)	(10,989)			(10,989)
Repurchases of common shares (in shares)	(221,903)		(221,903)				221,903
Repurchases of common shares	$ (40,000)	(40,000)					$ (40,000)
Issuance of common shares related to employee stock transactions (in shares)			24,411
Issuance of common shares related to employee stock transactions	0	0
Taxes paid on stock-based compensation	(1,870)	(1,870)		(1,870)
Stock-based compensation	$ 3,975	3,975		3,975
Balance at end of period, common stock (in shares) at Jun. 30, 2022	12,023,288		7,275,337
Balance at end of period at Jun. 30, 2022	$ 791,705	$ 784,708	$ 120	$ 1,275,907	$ 88,196	$ (267)	$ (579,248)	$ 6,997
Balance at end of period, treasury stock (in shares) at Jun. 30, 2022	4,747,951						4,747,951
Balance at beginning of period at Mar. 31, 2022	$ 138,738
Increase (Decrease) in Redeemable Non-controlling Interests [Roll Forward]
Total net income (loss) attributable to noncontrolling interests	(2,865)
Net subscriptions (redemptions) and other	3,274
Balance at end of period at Jun. 30, 2022	$ 139,147