Parent Company - Condensed Statements of Comprehensive Income (Details) - USD ($) $ in Thousands	4 Months Ended	9 Months Ended	12 Months Ended
	Apr. 15, 2015	Dec. 31, 2015	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Expenses
Operations and administrative			$ 23,039	$ 25,991	$ 21,923
Net income	$ 83,147	$ 114,343	158,340	197,490	190,057
Net income attributable to common stockholders			32,980	20,887
Foreign currency translation adjustment, net of taxes	$ (4,633)	$ 378	(1,165)	(4,255)	(5,032)
Comprehensive income attributable to common stockholders			32,629	20,986
Virtu Financial, Inc.
Revenues:
Service fee revenue				445	13,492
Expenses
Operations and administrative			198	447	13,492
Income (loss) before equity in income of subsidiary			(198)	(2)
Equity in income of subsidiary, net of tax			33,178	104,036	190,057
Net income			32,980	104,034	190,057
Net income attributable to common stockholders			32,980	20,887
Foreign currency translation adjustment, net of taxes			(351)	(4,534)	(5,032)
Comprehensive income attributable to common stockholders			$ 32,629	$ 16,353	$ 185,025