Consolidated Statements of Changes in Equity - USD ($) $ in Thousands	Total	Common Stock Class A	Common Stock Class C	Common Stock Class D	Treasury Stock	Additional Paid-in Capital	Retained Earnings (Accumulated Deficit)	Accumulated Other Comprehensive Income (Loss)	Total Virtu Financial Inc. Stockholders' Equity	Non-Controlling Interest
Balance at beginning period (in shares) at Dec. 31, 2016		40,436,580	19,810,707	79,610,490	453,066
Balance at beginning of period at Dec. 31, 2016	$ 534,412	$ 0	$ 0	$ 1	$ (8,358)	$ 155,536	$ (1,254)	$ (252)	$ 145,673	$ 388,739
Increase (decrease) in stockholder's/members' equity
Share based compensation (in shares)		546,265	(34,019)
Share based compensation	16,846					16,846			16,846
Repurchase of Class C common stock (in shares)			(540,686)
Repurchase of Class C common stock	(9,143)					(9,143)			(9,143)
Treasury stock purchases (in shares)					(163,857)
Treasury stock purchases	(2,683)				$ (2,683)				(2,683)
Net income	18,898						2,939		2,939	15,959
Foreign exchange translation adjustment	9,117							3,243	3,243	5,874
Distribution from Virtu Financial to non-controlling interest	(89,563)									(89,563)
Dividends	(63,814)						(63,814)		(63,814)
Issuance of Class A common stock (in shares)		48,076,924
Issuance of Class A common stock	735,974	$ 1				735,973			735,974
Issuance of common stock in connection with employee exchanges (in shares)		1,355,763
Repurchase of Virtu Financial Units and corresponding number of Class C common stock in connection with employee exchanges (in shares)			(1,355,763)
Issuance of tax receivable agreements in connection with employee exchange	1,534					1,534			1,534
Balance at end of period (in shares) at Dec. 31, 2017		90,415,532	17,880,239	79,610,490	616,923
Balance at end of period at Dec. 31, 2017	1,151,578	$ 1	$ 0	$ 1	$ (11,041)	900,746	(62,129)	2,991	830,569	321,009
Increase (decrease) in stockholder's/members' equity
Share based compensation (in shares)		1,027,861
Share based compensation	34,909					34,909			34,909
Repurchase of Class C common stock (in shares)			(210,891)
Repurchase of Class C common stock	(8,216)						(8,216)		(8,216)
Treasury stock purchases (in shares)		(1,007,230)			(1,561,848)
Treasury stock purchases	(66,218)				$ (43,964)		(22,254)		(66,218)
Stock option exercised (in shares)		4,080,673
Stock option exercised	76,754					76,754			76,754
Net income	620,192						289,441		289,441	330,751
Foreign exchange translation adjustment	(5,127)							(3,073)	(3,073)	(2,054)
Distribution from Virtu Financial to non-controlling interest	(206,903)									(206,903)
Dividends	(100,329)						(100,329)		(100,329)
Issuance of common stock in connection with employee exchanges (in shares)		3,919,462
Issuance of common stock in connection with secondary offering, net of offering costs (in shares)		10,518,750		10,518,750
Issuance of common stock in connection with secondary offering, net of offering costs	(950)					(950)			(950)
Repurchase of Virtu Financial Units and corresponding number of Class C common stock in connection with employee exchanges (in shares)			(3,919,462)
Issuance of tax receivable agreements in connection with employee exchange	(991)					(991)			(991)
Balance at end of period (in shares) at Dec. 31, 2018		108,955,048	13,749,886	69,091,740	2,178,771
Balance at end of period at Dec. 31, 2018	1,494,699	$ 1	$ 0	$ 1	$ (55,005)	1,010,468	96,513	(82)	1,051,896	442,803
Increase (decrease) in stockholder's/members' equity
Share based compensation (in shares)		2,226,676
Share based compensation	72,381					72,381			72,381
Repurchase of Class C common stock (in shares)			(9,541)
Repurchase of Class C common stock	(196)					(196)			(196)
Treasury stock purchases (in shares)		(720,323)
Treasury stock purchases	(15,878)						(15,878)		(15,878)
Stock option exercised (in shares)		121,344
Stock option exercised	931					931			931
Net income	(103,705)						(58,595)		(58,595)	(45,110)
Foreign exchange translation adjustment	(1,475)							(565)	(565)	(910)
Distribution from Virtu Financial to non-controlling interest	(99,221)									(99,221)
Dividends	(112,414)						(112,414)		(112,414)
Issuance of common stock in connection with employee exchanges (in shares)		853,167
Issuance of common stock in connection with secondary offering, net of offering costs (in shares)		9,000,000		9,000,000
Issuance of common stock in connection with secondary offering, net of offering costs	(375)					(375)			(375)
Repurchase of Virtu Financial Units and corresponding number of Class C common stock in connection with employee exchanges (in shares)			(853,167)
Issuance of tax receivable agreements in connection with employee exchange	(5,811)					(5,811)			(5,811)
Balance at end of period (in shares) at Dec. 31, 2019		120,435,912	12,887,178	60,091,740	2,178,771
Balance at end of period at Dec. 31, 2019	$ 1,228,936	$ 1	$ 0	$ 1	$ (55,005)	$ 1,077,398	$ (90,374)	$ (647)	$ 931,374	$ 297,562