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, 2024			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
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
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
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
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
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
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
Balance at beginning of period (in shares) at Dec. 31, 2025	6,695,181		6,695,181
Balance at beginning of period at Dec. 31, 2025	$ 934,845	934,043	$ 123	1,342,153	340,898	462	$ (749,593)	802
Balance at beginning of period, treasury stock (in shares) at Dec. 31, 2025	5,624,097						5,624,097
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)	$ 52,912	52,431			52,431			481
Foreign currency translation adjustments	(228)	(228)				(228)
Net subscriptions (redemptions) and other	(207)	0		0				(207)
Cash dividends declared, common	(33,359)	(33,359)			(33,359)
Repurchases of common shares (in shares)			(143,560)				143,560
Repurchases of common shares	(20,535)	(20,535)	$ 0	0			$ (20,535)
Issuance of common shares related to employee stock transactions (in shares)			71,001
Issuance of common shares related to employee stock transactions	0	0	$ 1	(1)
Taxes paid on stock-based compensation	(5,523)	(5,523)		(5,523)
Stock-based compensation	$ 18,450	18,450		18,450
Balance at end of period (in shares) at Jun. 30, 2026	6,622,622		6,622,622
Balance at end of period at Jun. 30, 2026	$ 946,355	945,279	$ 124	1,355,079	359,970	234	$ (770,128)	1,076
Balance at end of period, treasury stock (in shares) at Jun. 30, 2026	5,767,657						5,767,657
Balance at Dec. 31, 2025	$ 102,934
Increase (Decrease) in Redeemable Non-controlling Interests [Roll Forward]
Acquisition of businesses	104,564
Net income (loss)	(2,154)
Net subscriptions (redemptions) and other	(23)
Balance at Jun. 30, 2026	205,321
Balance at beginning of period (in shares) at Mar. 31, 2026			6,682,055
Balance at beginning of period at Mar. 31, 2026	918,406	917,401	$ 124	1,344,828	331,606	436	$ (759,593)	1,005
Balance at beginning of period, treasury stock (in shares) at Mar. 31, 2026							5,697,560
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)	45,440	45,306			45,306			134
Foreign currency translation adjustments	(202)	(202)				(202)
Net subscriptions (redemptions) and other	(63)	0		0				(63)
Cash dividends declared, common	(16,942)	(16,942)			(16,942)
Repurchases of common shares (in shares)			(70,097)				70,097
Repurchases of common shares	(10,535)	(10,535)					$ (10,535)
Issuance of common shares related to employee stock transactions (in shares)			10,664
Issuance of common shares related to employee stock transactions	0	0
Taxes paid on stock-based compensation	(386)	(386)		(386)
Stock-based compensation	$ 10,637	10,637		10,637
Balance at end of period (in shares) at Jun. 30, 2026	6,622,622		6,622,622
Balance at end of period at Jun. 30, 2026	$ 946,355	$ 945,279	$ 124	$ 1,355,079	$ 359,970	$ 234	$ (770,128)	$ 1,076
Balance at end of period, treasury stock (in shares) at Jun. 30, 2026	5,767,657						5,767,657
Balance at Mar. 31, 2026	$ 193,068
Increase (Decrease) in Redeemable Non-controlling Interests [Roll Forward]
Net income (loss)	(833)
Net subscriptions (redemptions) and other	13,086
Balance at Jun. 30, 2026	$ 205,321