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 (in shares) at Dec. 31, 2023			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
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
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 (in shares) at Mar. 31, 2024			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
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
Balance at beginning of period (in shares) at Dec. 31, 2024	6,967,147		6,967,147
Balance at beginning of period at Dec. 31, 2024	$ 901,636	897,493	$ 122	1,319,108	268,221	(364)	$ (689,594)	4,143
Balance at beginning of period, treasury stock (in shares) at Dec. 31, 2024	5,276,733						5,276,733
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)	$ 28,595	28,647			28,647			(52)
Foreign currency translation adjustments	292	292				292
Net subscriptions (redemptions) and other	(1,364)	195		195				(1,559)
Cash dividends declared, common	(15,889)	(15,889)			(15,889)
Repurchases of common shares (in shares)			111,200				111,200
Repurchases of common shares	(20,000)	(20,000)					$ (20,000)
Issuance of common shares related to employee stock transactions (in shares)			55,069
Issuance of common shares related to employee stock transactions	0		$ 1	(1)
Taxes paid on stock-based compensation	(6,109)	(6,109)		(6,109)
Stock-based compensation	$ 9,087	9,087		9,087
Balance at end of period (in shares) at Mar. 31, 2025	6,911,016		6,911,016
Balance at end of period at Mar. 31, 2025	$ 896,248	$ 893,716	$ 123	$ 1,322,280	$ 280,979	$ (72)	$ (709,594)	$ 2,532
Balance at end of period, treasury stock (in shares) at Mar. 31, 2025	5,387,933						5,387,933
Balance at Dec. 31, 2024	$ 107,282
Increase (Decrease) in Redeemable Non-controlling Interests [Roll Forward]
Net income (loss)	(543)
Net subscriptions (redemptions) and other	13,840
Balance at Mar. 31, 2025	$ 120,579