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)	47,190	47,472			47,472			(282)
Foreign currency translation adjustments	(113)	(113)				(113)
Net subscriptions (redemptions) and other	(576)	62		62				(638)
Cash dividends declared, common	(28,288)	(28,288)			(28,288)
Repurchases of common shares (in shares)			(76,207)				76,207
Repurchases of common shares	(17,499)	(17,499)					$ (17,499)
Issuance of common shares related to employee stock transactions (in shares)			70,550
Issuance of common shares related to employee stock transactions	0	0	$ 0	0
Taxes paid on stock-based compensation	(10,444)	(10,444)		(10,444)
Stock-based compensation	13,559	13,559		13,559
Balance at end of period (in shares) at Jun. 30, 2024			7,082,071
Balance at end of period at Jun. 30, 2024	872,118	868,675	$ 122	1,304,176	226,540	(200)	$ (661,963)	3,443
Balance at end of period, treasury stock (in shares) at Jun. 30, 2024							5,151,707
Balance at Dec. 31, 2023	104,869
Increase (Decrease) in Redeemable Non-controlling Interests [Roll Forward]
Net income (loss)	16,699
Net subscriptions (redemptions) and other	7,882
Balance at Jun. 30, 2024	129,450
Balance at beginning of period (in shares) at Mar. 31, 2024			7,127,881
Balance at beginning of period at Mar. 31, 2024	876,003	871,652	$ 122	1,298,157	223,023	(187)	$ (649,463)	4,351
Balance at beginning of period, treasury stock (in shares) at Mar. 31, 2024							5,096,608
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)	16,941	17,614			17,614			(673)
Foreign currency translation adjustments	(13)	(13)				(13)
Net subscriptions (redemptions) and other	(173)	62		62				(235)
Cash dividends declared, common	(14,097)	(14,097)			(14,097)
Repurchases of common shares (in shares)			(55,099)				55,099
Repurchases of common shares	(12,500)	(12,500)					$ (12,500)
Issuance of common shares related to employee stock transactions (in shares)			9,289
Issuance of common shares related to employee stock transactions	0
Taxes paid on stock-based compensation	(592)	(592)		(592)
Stock-based compensation	6,549	6,549		6,549
Balance at end of period (in shares) at Jun. 30, 2024			7,082,071
Balance at end of period at Jun. 30, 2024	872,118	868,675	$ 122	1,304,176	226,540	(200)	$ (661,963)	3,443
Balance at end of period, treasury stock (in shares) at Jun. 30, 2024							5,151,707
Balance at Mar. 31, 2024	115,185
Increase (Decrease) in Redeemable Non-controlling Interests [Roll Forward]
Net income (loss)	9,081
Net subscriptions (redemptions) and other	5,184
Balance at Jun. 30, 2024	$ 129,450
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)	$ 70,694	71,020			71,020			(326)
Foreign currency translation adjustments	950	950				950
Net subscriptions (redemptions) and other	(1,689)	195		195				(1,884)
Cash dividends declared, common	(31,832)	(31,832)			(31,832)
Repurchases of common shares (in shares)			(287,072)				287,072
Repurchases of common shares	(50,000)	(50,000)					$ (50,000)
Issuance of common shares related to employee stock transactions (in shares)			68,013
Issuance of common shares related to employee stock transactions	0	0	$ 1	(1)
Taxes paid on stock-based compensation	(6,966)	(6,966)		(6,966)
Stock-based compensation	$ 15,536	15,536		15,536
Balance at end of period (in shares) at Jun. 30, 2025	6,748,088		6,748,088
Balance at end of period at Jun. 30, 2025	$ 898,329	896,396	$ 123	1,327,872	307,409	586	$ (739,594)	1,933
Balance at end of period, treasury stock (in shares) at Jun. 30, 2025	5,563,805						5,563,805
Balance at Dec. 31, 2024	$ 107,282
Increase (Decrease) in Redeemable Non-controlling Interests [Roll Forward]
Net income (loss)	101
Net subscriptions (redemptions) and other	15,714
Balance at Jun. 30, 2025	123,097
Balance at beginning of period (in shares) at Mar. 31, 2025			6,911,016
Balance at beginning of period at Mar. 31, 2025	896,248	893,716	$ 123	1,322,280	280,979	(72)	$ (709,594)	2,532
Balance at beginning of period, treasury stock (in shares) at Mar. 31, 2025							5,387,933
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)	42,099	42,373			42,373			(274)
Foreign currency translation adjustments	658	658				658
Net subscriptions (redemptions) and other	(325)	0		0				(325)
Cash dividends declared, common	(15,943)	(15,943)			(15,943)
Repurchases of common shares (in shares)			(175,872)				175,872
Repurchases of common shares	(30,000)	(30,000)					$ (30,000)
Issuance of common shares related to employee stock transactions (in shares)			12,944
Issuance of common shares related to employee stock transactions	0	0	$ 0	0
Taxes paid on stock-based compensation	(857)	(857)		(857)
Stock-based compensation	$ 6,449	6,449		6,449
Balance at end of period (in shares) at Jun. 30, 2025	6,748,088		6,748,088
Balance at end of period at Jun. 30, 2025	$ 898,329	$ 896,396	$ 123	$ 1,327,872	$ 307,409	$ 586	$ (739,594)	$ 1,933
Balance at end of period, treasury stock (in shares) at Jun. 30, 2025	5,563,805						5,563,805
Balance at Mar. 31, 2025	$ 120,579
Increase (Decrease) in Redeemable Non-controlling Interests [Roll Forward]
Net income (loss)	644
Net subscriptions (redemptions) and other	1,874
Balance at Jun. 30, 2025	$ 123,097