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)	68,996	68,881			68,881			115
Foreign currency translation adjustments	211	211				211
Net subscriptions (redemptions) and other	(836)	0						(836)
Cash dividends declared, common	(25,131)	(25,131)			(25,131)
Repurchases of common shares (in shares)			(51,840)				51,840
Repurchases of common shares	(10,000)	(10,000)					$ (10,000)
Issuance of common shares related to employee stock transactions (in shares)			125,072
Issuance of common shares related to employee stock transactions	0	0	$ 2	(2)
Taxes paid on stock-based compensation	(13,222)	(13,222)		(13,222)
Stock-based compensation	13,755	13,755		13,755
Balance at end of period, common stock (in shares) at Jun. 30, 2023			7,254,786
Balance at end of period at Jun. 30, 2023	856,709	851,513	$ 122	1,286,775	174,011	(147)	$ (609,248)	5,196
Balance at end of period, treasury stock (in shares) at Jun. 30, 2023							4,903,533
Balance at Dec. 31, 2022	113,718
Increase (Decrease) in Redeemable Non-controlling Interests [Roll Forward]
Net income (loss)	(4,173)
Net subscriptions (redemptions) and other	854
Balance at Jun. 30, 2023	110,399
Balance at beginning of period, common stock (in shares) at Mar. 31, 2023			7,288,394
Balance at beginning of period at Mar. 31, 2023	844,297	837,915	$ 121	1,281,509	155,792	(259)	$ (599,248)	6,382
Balance at beginning of period, treasury stock (in shares) at Mar. 31, 2023							4,851,693
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)	29,607	30,257			30,257			(650)
Foreign currency translation adjustments	112	112				112
Net subscriptions (redemptions) and other	(536)	0						(536)
Cash dividends declared, common	(12,038)	(12,038)			(12,038)
Issuance of common shares related to employee stock transactions (in shares)			18,232
Issuance of common shares related to employee stock transactions	0	0	$ 1	(1)
Taxes paid on stock-based compensation	(1,013)	(1,013)		(1,013)
Stock-based compensation	6,280	6,280		6,280
Balance at end of period, common stock (in shares) at Jun. 30, 2023			7,254,786
Balance at end of period at Jun. 30, 2023	856,709	851,513	$ 122	1,286,775	174,011	(147)	$ (609,248)	5,196
Balance at end of period, treasury stock (in shares) at Jun. 30, 2023							4,903,533
Balance at Mar. 31, 2023	106,630
Increase (Decrease) in Redeemable Non-controlling Interests [Roll Forward]
Net income (loss)	573
Net subscriptions (redemptions) and other	3,196
Balance at Jun. 30, 2023	$ 110,399
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)	$ 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, common stock (in shares) at Jun. 30, 2024	12,233,778		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						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, common stock (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	0
Taxes paid on stock-based compensation	(592)	(592)		(592)
Stock-based compensation	$ 6,549	6,549		6,549
Balance at end of period, common stock (in shares) at Jun. 30, 2024	12,233,778		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						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