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, 2021			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
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)	0						(1,018)
Cash dividends declared, common	(23,227)	(23,227)		0	(23,227)
Repurchases of common shares (in shares)			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			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
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, common	(10,989)	(10,989)			(10,989)
Repurchases of common shares (in shares)			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			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
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
Balance at beginning of period, common stock (in shares) at Dec. 31, 2022	12,033,247		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						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		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	12,158,319		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						4,903,533
Balance at beginning of period at Dec. 31, 2022	$ 113,718
Increase (Decrease) in Redeemable Non-controlling Interests [Roll Forward]
Total net income (loss) attributable to noncontrolling interests	(4,173)
Net subscriptions (redemptions) and other	854
Balance at end of period 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)
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)			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	12,158,319		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						4,903,533
Balance at beginning of period at Mar. 31, 2023	$ 106,630
Increase (Decrease) in Redeemable Non-controlling Interests [Roll Forward]
Total net income (loss) attributable to noncontrolling interests	573
Net subscriptions (redemptions) and other	3,196
Balance at end of period at Jun. 30, 2023	$ 110,399