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, 2020			7,583,466
Beginning Balance at Dec. 31, 2020	$ 720,940	$ 711,141	$ 118	$ 1,298,002	$ (135,259)	$ 29	$ (451,749)	$ 9,799
Balance at beginning of period, treasury stock (in shares) at Dec. 31, 2020							4,207,403
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)	208,948	208,131			208,131			817
Foreign currency translation adjustments	(9)	(9)				(9)
Net subscriptions (redemptions) and other	(2,266)							(2,266)
Cash dividends declared, common	(37,222)	(37,222)		(25,312)	(11,910)
Repurchase of common shares (in shares)			(193,193)				193,193
Repurchase of common shares	(57,499)	(57,499)					$ (57,499)
Issuance of common shares related to employee stock transactions (in shares)			115,878
Issuance of common shares related to employee stock transactions	66	66	$ 1	65
Taxes paid on stock-based compensation	(19,509)	(19,509)		(19,509)
Stock-based compensation	23,178	23,178		23,178
Balance at ending of period, common stock (in shares) at Dec. 31, 2021			7,506,151
Ending Balance at Dec. 31, 2021	836,627	828,277	$ 119	1,276,424	60,962	20	$ (509,248)	8,350
Balance at ending of period, treasury stock (in shares) at Dec. 31, 2021							4,400,596
Balance at Dec. 31, 2020	115,513
Increase (Decrease) in Redeemable Non-controlling Interests [Roll Forward]
Net income (loss)	53,887
Net subscriptions (redemptions) and other	(30,435)
Balance at Dec. 31, 2021	138,965
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)	116,776	117,541			117,541			(765)
Foreign currency translation adjustments	(378)	(378)				(378)
Net subscriptions (redemptions) and other	367	2,035		2,035				(1,668)
Cash dividends declared, common	(48,242)	(48,242)			(48,242)
Repurchase of common shares (in shares)			(451,097)				451,097
Repurchase of common shares	(90,000)	(90,000)					$ (90,000)
Issuance of common shares related to employee stock transactions (in shares)			126,500
Issuance of common shares related to employee stock transactions	0	0	$ 1	(1)
Taxes paid on stock-based compensation	(16,830)	(16,830)		(16,830)
Stock-based compensation	$ 24,616	24,616		24,616
Balance at ending of period, common stock (in shares) at Dec. 31, 2022	12,033,247		7,181,554
Ending Balance at Dec. 31, 2022	$ 822,936	817,019	$ 120	1,286,244	130,261	(358)	$ (599,248)	5,917
Balance at ending of period, treasury stock (in shares) at Dec. 31, 2022	4,851,693						4,851,693
Increase (Decrease) in Redeemable Non-controlling Interests [Roll Forward]
Net income (loss)	$ (10,148)
Net subscriptions (redemptions) and other	(15,099)
Balance at Dec. 31, 2022	113,718
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)	130,691	130,621			130,621			70
Foreign currency translation adjustments	271	271				271
Net subscriptions (redemptions) and other	1,564	3,188		3,188				(1,624)
Cash dividends declared, common	(53,526)	(53,526)			(53,526)
Repurchase of common shares (in shares)			(223,807)				223,807
Repurchase of common shares	(45,216)	(45,216)					$ (45,216)
Issuance of common shares related to employee stock transactions (in shares)			129,981
Issuance of common shares related to employee stock transactions	0	0	$ 2	(2)
Taxes paid on stock-based compensation	(13,774)	(13,774)		(13,774)
Stock-based compensation	$ 25,343	25,343		25,343
Balance at ending of period, common stock (in shares) at Dec. 31, 2023	12,163,228		7,087,728
Ending Balance at Dec. 31, 2023	$ 868,289	$ 863,926	$ 122	$ 1,300,999	$ 207,356	$ (87)	$ (644,464)	$ 4,363
Balance at ending of period, treasury stock (in shares) at Dec. 31, 2023	5,075,500						5,075,500
Increase (Decrease) in Redeemable Non-controlling Interests [Roll Forward]
Net income (loss)	$ 10,785
Net subscriptions (redemptions) and other	(19,634)
Balance at Dec. 31, 2023	$ 104,869