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Earnings Per Share - Basic (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
Basic earnings per share
Net income available for common stockholders	$ 4,580	$ 10,348
Less: Dividends and undistributed earnings allocated to participating securities	(353)	(221)
Net income available for common stockholders, net of dividends and undistributed earnings allocated to participating securities	$ 4,227	$ 10,127
Weighted average shares of common stock outstanding
Outstanding	40,398,381	38,210,209
Basic Earnings per share	$ 0.10	$ 0.27
Class A
Weighted average shares of common stock outstanding
Outstanding	40,398,381	38,210,209
Basic Earnings per share	$ 0.10	$ 0.27
Virtu Financial
Weighted average shares of common stock outstanding
Ownership interest (as a percent)	29.90%

X

- Definition

The amount of net income (loss) for the period per each share of common stock or unit outstanding during the reporting period.

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The percentage of ownership of common stock or equity participation in the investee accounted for under the equity method of accounting.

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The portion of profit or loss for the period, net of income taxes, which is attributable to the parent.

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Net income after adjustments for dividends on preferred stock (declared in the period) and/or cumulative preferred stock (accumulated for the period).

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Amount of earnings (loss) distributed and earnings (loss) allocated to participating securities for the basic earnings (loss) per share or per unit calculation under the two-class method.

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Number of [basic] shares or units, after adjustment for contingently issuable shares or units and other shares or units not deemed outstanding, determined by relating the portion of time within a reporting period that common shares or units have been outstanding to the total time in that period.

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