Parent Company - Statements of Financial Condition (Details) - USD ($) $ / shares in Units, $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Assets
Cash	$ 1,071,463	$ 889,559
Deferred tax assets	158,518	193,070
Other assets	291,306	317,747
Total assets	10,319,971	9,965,798
Liabilities
Accounts payable, accrued expenses and other liabilities	457,942	491,818
Deferred tax liabilities	65	0
Tax receivable agreement obligations	259,282	271,165
Total liabilities	8,456,353	8,110,760
Virtu Financial Inc. Stockholders' equity
Treasury stock, at cost, 18,326,863 and 3,615,097 shares at December 31, 2021 and December 31, 2020, respectively	(494,075)	(88,923)
Additional paid-in capital	1,223,119	1,160,567
Retained earnings (accumulated deficit)	830,538	422,381
Accumulated other comprehensive income (loss)	(10,196)	(25,487)
Total Virtu Financial Inc. stockholders' equity	1,549,388	1,468,540
Total liabilities and stockholders' equity	$ 10,319,971	$ 9,965,798
Treasury stock, shares (in shares)	18,326,863	3,615,097
Class A common stock
Virtu Financial Inc. Stockholders' equity
Common stock	$ 1	$ 1
Common stock, par value (in dollars per share)	$ 0.00001	$ 0.00001
Common stock, shares authorized (in shares)	1,000,000,000	1,000,000,000
Common stock, shares issued (in shares)	131,497,645	125,627,277
Common stock, shares outstanding (in shares)	113,170,782	122,012,180
Class B common stock
Virtu Financial Inc. Stockholders' equity
Common stock	$ 0	$ 0
Common stock, par value (in dollars per share)	$ 0.00001	$ 0.00001
Common stock, shares authorized (in shares)	175,000,000	175,000,000
Common stock, shares issued (in shares)	0	0
Common stock, shares outstanding (in shares)	0	0
Class C common stock
Virtu Financial Inc. Stockholders' equity
Common stock	$ 0	$ 0
Common stock, par value (in dollars per share)	$ 0.00001	$ 0.00001
Common stock, shares authorized (in shares)	90,000,000	90,000,000
Common stock, shares issued (in shares)	9,359,065	10,226,939
Common stock, shares outstanding (in shares)	9,359,065	10,226,939
Class D common stock
Virtu Financial Inc. Stockholders' equity
Common stock	$ 1	$ 1
Common stock, par value (in dollars per share)	$ 0.00001	$ 0.00001
Common stock, shares authorized (in shares)	175,000,000	175,000,000
Common stock, shares issued (in shares)	60,091,740	60,091,740
Common stock, shares outstanding (in shares)	60,091,740	60,091,740
VFH
Assets
Cash	$ 129,229	$ 71,481
Deferred tax assets	149,742	183,549
Investment in subsidiary	3,221,605	3,126,502
Other assets	40,183	82,917
Total assets	3,540,759	3,464,449
Liabilities
Payable to affiliate	1,729,320	1,724,046
Accounts payable, accrued expenses and other liabilities	50	698
Deferred tax liabilities	2,719	0
Tax receivable agreement obligations	259,282	271,165
Total liabilities	1,991,371	1,995,909
Virtu Financial Inc. Stockholders' equity
Treasury stock, at cost, 18,326,863 and 3,615,097 shares at December 31, 2021 and December 31, 2020, respectively	(494,075)	(88,923)
Additional paid-in capital	1,223,119	1,160,567
Retained earnings (accumulated deficit)	830,538	422,381
Accumulated other comprehensive income (loss)	(10,196)	(25,487)
Total Virtu Financial Inc. stockholders' equity	1,549,388	1,468,540
Total liabilities and stockholders' equity	$ 3,540,759	$ 3,464,449
Treasury stock, shares (in shares)	18,326,863	3,615,097
VFH | Class A common stock
Virtu Financial Inc. Stockholders' equity
Common stock	$ 1	$ 1
Common stock, par value (in dollars per share)	$ 0.00001	$ 0.00001
Common stock, shares authorized (in shares)	1,000,000,000	1,000,000,000
Common stock, shares issued (in shares)	131,497,645	125,627,277
Common stock, shares outstanding (in shares)	113,170,782	122,012,180
VFH | Class B common stock
Virtu Financial Inc. Stockholders' equity
Common stock	$ 0	$ 0
Common stock, par value (in dollars per share)	$ 0.00001	$ 0.00001
Common stock, shares authorized (in shares)	175,000,000	175,000,000
Common stock, shares issued (in shares)	0	0
Common stock, shares outstanding (in shares)	0	0
VFH | Class C common stock
Virtu Financial Inc. Stockholders' equity
Common stock	$ 0	$ 0
Common stock, par value (in dollars per share)	$ 0.00001	$ 0.00001
Common stock, shares authorized (in shares)	90,000,000	90,000,000
Common stock, shares issued (in shares)	9,359,065	10,226,939
Common stock, shares outstanding (in shares)	9,359,065	10,226,939
VFH | Class D common stock
Virtu Financial Inc. Stockholders' equity
Common stock	$ 1	$ 1
Common stock, par value (in dollars per share)	$ 0.00001	$ 0.00001
Common stock, shares authorized (in shares)	175,000,000	175,000,000
Common stock, shares issued (in shares)	60,091,740	69,091,740
Common stock, shares outstanding (in shares)	60,091,740	69,091,740