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Regulatory Requirement (Details) $ in Thousands | 3 Months Ended |  |
--- | --- | --- | ---
Mar. 31, 2018 USD ($) trading_unit subsidiary | Dec. 31, 2017 USD ($) | Nov. 03, 2017 broker_dealer
Entity Information [Line Items] |  |  |
Number of broker-dealer subsidiaries | 3 |  | 3
Regulatory Capital | $ 1,000 |  |
Virtu Americas LLC |  |  |
Entity Information [Line Items] |  |  |
Regulatory Capital | 411,168 | $ 379,875 |
Minimum Net Capital Required | 1,000 | 1,000 |
Excess Regulatory Capital | 410,168 | 378,875 |
Virtu Financial BD LLC |  |  |
Entity Information [Line Items] |  |  |
Regulatory Capital | 88,280 | 40,683 |
Minimum Net Capital Required | 1,000 | 1,000 |
Excess Regulatory Capital | 87,280 | 39,683 |
Virtu Financial Capital Markets LLC |  |  |
Entity Information [Line Items] |  |  |
Regulatory Capital | 8,563 | 8,308 |
Minimum Net Capital Required | 4,696 | 5,114 |
Excess Regulatory Capital | 3,867 | 3,194 |
Minimum capital required to be maintained in connection with the operation of the Company's DMM business | 3,700 | $ 4,100 |
Required amount under exchange rules | $ 1,000 |  |
Required amount under exchange rules as percentage of market value | 15.00% |  |
Number of trading units whose market value is considered to calculate required net capital under exchange act | trading_unit | 60 |  |

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- Definition The amount of net capital in excess of the minimum required net capital. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Rule 15c3-1 -Number 240 -Section 15c3-1 + Details
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- Definition Amount of minimum net capital required to be maintained to engage in securities transactions. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Rule 15c3-1 -Number 240 -Section 15c3-1 + Details
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- Definition Minimum amount of net capital required to be maintained by the entity to engage in securities transactions. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Rule 15c3-1 -Number 240 -Section 15c3-1 + Details
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- Definition Net capital is equal to the net worth of the broker dealer, less certain items such as exchange memberships, carrying value of securities not readily marketable, haircuts on marketable securities in proprietary accounts, furniture and equipment and other illiquid assets as defined. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Rule 15c3-1 -Number 240 -Section 15c3-1 + Details
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