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, 2015	Dec. 31, 2014	Dec. 31, 2013
Expenses
Operations and administrative			$ 25,991	$ 21,923	$ 27,215
Net income	$ 83,147	$ 114,343	197,490	190,057	182,203
Net income attributable to common stockholders			20,887
Foreign currency translation adjustment, net of taxes			(4,255)	(5,032)	1,382
Comprehensive income attributable to common stockholders			20,986
Virtu Financial, Inc.
Revenues:
Service fee revenue			445	13,492	2,089
Expenses
Operations and administrative			447	13,492	2,089
Income (loss) before equity in income of subsidiary			(2)
Equity in income of subsidiary, net of tax			104,036	190,057	182,203
Net income			104,034	190,057	182,203
Net income attributable to common stockholders			20,887
Foreign currency translation adjustment, net of taxes			(4,534)	(5,032)	1,382
Comprehensive income attributable to common stockholders			$ 16,353	$ 185,025	$ 183,585