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, 2022			7,181,554
Balance at beginning of period at Dec. 31, 2022	$ 822,936	$ 817,019	$ 120	$ 1,286,244	$ 130,261	$ (358)	$ (599,248)	$ 5,917
Balance at beginning of period, treasury stock (in shares) at Dec. 31, 2022							4,851,693
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)	39,389	38,624			38,624			765
Foreign currency translation adjustments	99	99				99
Net subscriptions (redemptions) and other	(300)	0		0				(300)
Cash dividends declared, common	(13,093)	(13,093)			(13,093)
Issuance of common shares related to employee stock transactions (in shares)			106,840
Issuance of common shares related to employee stock transactions	0	0	$ 1	(1)
Taxes paid on stock-based compensation	(12,209)	(12,209)		(12,209)
Stock-based compensation	7,475	7,475		7,475
Balance at end of period, common stock (in shares) at Mar. 31, 2023			7,288,394
Balance at end of period at Mar. 31, 2023	844,297	837,915	$ 121	1,281,509	155,792	(259)	$ (599,248)	6,382
Balance at end of period, treasury stock (in shares) at Mar. 31, 2023							4,851,693
Balance at Dec. 31, 2022	113,718
Increase (Decrease) in Redeemable Non-controlling Interests [Roll Forward]
Net income (loss)	(4,746)
Net subscriptions (redemptions) and other	(2,342)
Balance at Mar. 31, 2023	$ 106,630
Balance at beginning of period, common stock (in shares) at Dec. 31, 2023	12,163,228		7,087,728
Balance at beginning of period at Dec. 31, 2023	$ 868,289	863,926	$ 122	1,300,999	207,356	(87)	$ (644,464)	4,363
Balance at beginning of period, treasury stock (in shares) at Dec. 31, 2023	5,075,500						5,075,500
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)	$ 30,249	29,858			29,858			391
Foreign currency translation adjustments	(100)	(100)				(100)
Net subscriptions (redemptions) and other	(403)	0		0				(403)
Cash dividends declared, common	(14,191)	(14,191)			(14,191)
Repurchases of common shares (in shares)			21,108				21,108
Repurchases of common shares	(4,999)	(4,999)					$ (4,999)
Issuance of common shares related to employee stock transactions (in shares)			61,261
Issuance of common shares related to employee stock transactions	0	0
Taxes paid on stock-based compensation	(9,852)	(9,852)		(9,852)
Stock-based compensation	$ 7,010	7,010		7,010
Balance at end of period, common stock (in shares) at Mar. 31, 2024	12,224,489		7,127,881
Balance at end of period at Mar. 31, 2024	$ 876,003	$ 871,652	$ 122	$ 1,298,157	$ 223,023	$ (187)	$ (649,463)	$ 4,351
Balance at end of period, treasury stock (in shares) at Mar. 31, 2024	5,096,608						5,096,608
Balance at Dec. 31, 2023	$ 104,869
Increase (Decrease) in Redeemable Non-controlling Interests [Roll Forward]
Net income (loss)	7,618
Net subscriptions (redemptions) and other	2,698
Balance at Mar. 31, 2024	$ 115,185