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
Foreign currency translation adjustments, 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)	33,002	33,059			33,059			(57)
Foreign currency translation adjustments	(50)	(50)				(50)
Net subscriptions (redemptions) and other	(487)	0						(487)
Cash dividends declared, common	(12,238)	(12,238)			(12,238)
Repurchases of common shares (in shares)			(125,452)				125,452
Repurchases of common shares	(30,000)	(30,000)					$ (30,000)
Issuance of common shares related to employee stock transactions (in shares)			92,130
Issuance of common shares related to employee stock transactions	0	0	$ 1	(1)
Taxes paid on stock-based compensation	(13,414)	(13,414)		(13,414)
Stock-based compensation	10,793	10,793		10,793
Balance at end of period, common stock (in shares) at Mar. 31, 2022			7,472,829
Foreign currency translation adjustments, end of period at Mar. 31, 2022	824,233	816,427	$ 120	1,273,802	81,783	(30)	$ (539,248)	7,806
Balance at end of period, treasury stock (in shares) at Mar. 31, 2022							4,526,048
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	6,117
Net subscriptions (redemptions) and other	(6,344)
Balance at end of period at Mar. 31, 2022	$ 138,738
Balance at beginning of period, common stock (in shares) at Dec. 31, 2022	12,033,247		7,181,554
Foreign currency translation adjustments, 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)	$ 39,389	38,624			38,624			765
Foreign currency translation adjustments	99	99				99
Net subscriptions (redemptions) and other	(300)	0						(300)
Cash dividends declared, common	(13,093)	(13,093)			(13,093)
Issuance of common shares related to employee stock transactions (in shares)			106,840
Issuance of common shares related to employee stock transactions	0	0	$ 1	(1)
Taxes paid on stock-based compensation	(12,209)	(12,209)		(12,209)
Stock-based compensation	$ 7,475	7,475		7,475
Balance at end of period, common stock (in shares) at Mar. 31, 2023	12,140,087		7,288,394
Foreign currency translation adjustments, end of period at Mar. 31, 2023	$ 844,297	$ 837,915	$ 121	$ 1,281,509	$ 155,792	$ (259)	$ (599,248)	$ 6,382
Balance at end of period, treasury stock (in shares) at Mar. 31, 2023	4,851,693						4,851,693
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	(4,746)
Net subscriptions (redemptions) and other	(2,342)
Balance at end of period at Mar. 31, 2023	$ 106,630