Parent Company - Statements of Cash Flows (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Cash flows from operating activities
Net income	$ 827,234	$ 1,120,913	$ (103,705)
Adjustments to reconcile net income to net cash provided by operating activities:
Deferred taxes	34,617	21,601	(18,691)
Net cash provided by operating activities	1,171,626	1,060,884	168,771
Cash flows from investing activities
Net cash used in investing activities	(87,349)	(2,559)	(899,643)
Cash flows from financing activities
Dividends to stockholders and distributions from Virtu Financial to noncontrolling interest	(548,017)	(484,415)	(211,635)
Repurchase of Class C common stock	(3,454)	0	(196)
Tax receivable agreement obligations	(16,505)	(13,286)	0
Net cash provided by (used in) financing activities	(957,859)	(839,918)	769,580
Net increase in cash and cash equivalents	113,948	233,725	37,233
Cash, cash equivalents, and restricted or segregated cash, beginning of period	1,007,005	773,280	736,047
Cash, cash equivalents, and restricted or segregated cash, end of period	1,120,953	1,007,005	773,280
Supplementary disclosure of cash flow information
Cash paid for taxes	134,878	248,532	12,273
Non-cash financing activities
Tax receivable agreement described in Note 6	(311)	1,388	5,811
VFH
Cash flows from operating activities
Net income	827,234	1,120,913	(29,419)
Adjustments to reconcile net income to net cash provided by operating activities:
Equity in income of subsidiary, net of tax	87,055	(543,992)	136,878
Tax receivable agreement obligation reduction	4,622	15,169	54,879
Deferred taxes	36,526	14,243	(8,165)
Changes in operating assets and liabilities:	42,086	(48,566)	2,339
Net cash provided by operating activities	997,523	557,767	156,512
Cash flows from investing activities
Investments in subsidiaries, equity basis	55,654	56,629	70,762
Net cash used in investing activities	55,654	56,629	70,762
Cash flows from financing activities
Dividends to stockholders and distributions from Virtu Financial to noncontrolling interest	(548,017)	(484,415)	(211,635)
Repurchase of Class C common stock	(427,454)	(49,864)	(14,259)
Tax receivable agreement obligations	(16,505)	(13,286)	0
Issuance of common stock in connection with secondary offering, net of offering costs	0	0	(375)
Net cash provided by (used in) financing activities	(995,430)	(547,565)	(226,465)
Net increase in cash and cash equivalents	57,747	66,831	809
Cash, cash equivalents, and restricted or segregated cash, beginning of period	71,481	4,650	3,841
Cash, cash equivalents, and restricted or segregated cash, end of period	129,228	71,481	4,650
Supplementary disclosure of cash flow information
Cash paid for taxes	78,844	203,031	1,332
Non-cash financing activities
Tax receivable agreement described in Note 6	311	(1,388)	(5,811)
VFH | Class C Common Stock
Cash flows from financing activities
Repurchase of Class C common stock	$ (3,454)	$ 0	$ (196)