Tax Receivable Agreements (Details) - USD ($) $ in Thousands		3 Months Ended	12 Months Ended
	Apr. 15, 2015	Mar. 31, 2017	Dec. 31, 2015	Feb. 28, 2017	Dec. 31, 2016
Tax Receivable Agreements
Payment on applicable cash tax savings (as a percent)	85.00%
First payment due after filing of company's tax return			120 days
First payment made		$ 7,000
Deferred tax assets related to exchange of units	$ 215,900
Payments to certain Virtu Members	236,400
Minimum tax receivable agreement obligation over the agreed period	300
Maximum tax receivable agreement obligation over the agreed period	$ 21,200
Period over which the obligations are to be settled	15 years
Reduction of paid-in capital for the difference between TRA liability and related deferred tax asset.	$ 20,500
Deferred tax asset recorded in connection with a stock offering				$ 5,800
Amount of payment liability pursuant to tax receivable agreements				5,000
Increase in additional paid-in capital related to tax receivable agreements				$ 800
Deferred tax assets		189,600			$ 185,600
Tax receivable agreement obligations		$ 229,381			$ 231,404