Accounting Policies [Abstract] Summary of Significant Accounting Policies Significant Accounting Policies [Text Block] Equity [Abstract] Schedule of Stock by Class [Table] Schedule of Stock by Class [Table] Class of Stock [Axis] Class of Stock [Axis] Class of Stock [Domain] Class of Stock [Domain] Class A Common Class A [Member] Class of Stock [Line Items] Class of Stock [Line Items] Authorized repurchase amount Stock Repurchase Program, Authorized Amount Increase in authorized repurchase amount Stock Repurchase Program, Increase In Authorized Amount Stock Repurchase Program, Increase In Authorized Amount Number of shares repurchased Treasury Stock, Shares, Acquired Value of shares repurchased Treasury Stock, Value, Acquired, Cost Method Remaining capacity for future purchases Stock Repurchase Program, Remaining Authorized Repurchase Amount Cash and Cash Equivalents [Abstract] Cash Cash and Cash Equivalents Disclosure [Text Block] Class A common stock and Class C common stock Common Class A And C [Member] Represents the information pertaining to classification of common stock of A and C representing ownership interest in a corporation. Class B common stock and Class D common stock Common Class B And D [Member] Represents the information pertaining to classification of common stock of B and D representing ownership interest in a corporation. Number of classes of common stock Number Of Classes Of Common Stock Represents the number of Classes of common stock. Number of votes Number of Votes to Stockholders Represents the information pertaining to number of votes provided to stockholders on all matters. Non-voting common interest units outstanding (in shares) Nonvoting Common Interest Units Outstanding Number of non-voting common interest units outstanding related to former Class A-2 profits, interests, Class B and East MIP Class B interests that were reclassified into non-voting common interest units. Number of non-voting common interest units forfeited or repurchased (in shares) Nonvoting Common Interest Units Forfeited Or Repurchased Number of non-voting common interest units forfeited or repurchased during the period. Organization, Consolidation and Presentation of Financial Statements [Abstract] Organization and Basis of Presentation Organization, Consolidation and Presentation of Financial Statements Disclosure [Text Block] Debt Disclosure [Abstract] Line of Credit Facility [Table] Line of Credit Facility [Table] Credit Facility [Axis] Credit Facility [Axis] Credit Facility [Domain] Credit Facility [Domain] Uncommitted facility Uncommitted Broker Dealer Credit Facility [Member] Represents information pertaining to the credit facility entered with broker-dealer subsidiaries on an uncommitted basis. Committed facility Revolving Credit Facility [Member] Broker-dealer credit facilities Broker Dealer Credit Facilities [Member] Represents information pertaining to the credit facility entered with broker-dealer subsidiaries. Line of Credit Facility [Line Items] Line of Credit Facility [Line Items] Interest Rate Line of Credit Facility, Interest Rate at Period End Financing Available Debt Instrument, Unused Borrowing Capacity, Amount Borrowing Outstanding Long-term Debt, Gross Deferred Debt Issuance Cost Debt Issuance Costs, Net Outstanding Borrowings, net Long-term Debt Broker-Dealer, Net Capital Requirement, SEC Regulation [Abstract] Schedule of Compliance with Regulatory Capital Requirements under Banking Regulations [Table] Schedule of Compliance with Regulatory Capital Requirements under Banking Regulations [Table] Legal Entity [Axis] Legal Entity [Axis] Entity [Domain] Entity [Domain] Virtu Financial Capital Markets LLC Virtu Financial Capital Markets Llc [Member] Represents information related to Virtu Financial Capital Markets LLC (“VFCM”). VAL Virtu Americas Llc [Member] Represents information pertaining to Virtu Americas LLC. VITG Virtu ITG LLC [Member] Virtu ITG LLC [Member] Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items] Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items] Number of broker-dealer subsidiaries Number of Broker Dealer Subsidiaries of Entity Represents the number of broker-dealer subsidiaries of the entity. Minimum capital required to be maintained in connection with the operation of the Company's DMM business Broker-Dealer, Minimum Net Capital Required, Parent, Aggregate Indebtedness Standard Required amount under exchange rules Required Net Capital under Exchange Act Represents the amount of minimum net capital required to be maintained by the entity under the exchange act. Required amount under exchange rules for every 0.1% NYSE transaction dollar volume Required Net Capital Under Exchange Act For Every Transaction Dollar Volume Required Net Capital Under Exchange Act For Every Transaction Dollar Volume Percentage of NYSE transaction dollar volume Percentage Of NYSE Transaction Dollar Volume Percentage Of NYSE Transaction Dollar Volume Cash in special reserve bank accounts for the benefit of customers Cash Reserve Deposit Required and Made Cash in reserve bank accounts for the benefit of proprietary accounts of brokers Cash Segregated under Other Regulations Schedule of Long-term Debt Instruments [Table] Schedule of Long-term Debt Instruments [Table] Senior Secured Second Lien Notes Senior Secured Second Lien Notes [Member] Represents information pertaining to the senior secured second lien notes. Debt Instrument [Line Items] Debt Instrument [Line Items] Face amount Debt Instrument, Face Amount Interest rate Debt Instrument, Interest Rate, Stated Percentage Business Combinations [Abstract] Schedule of Business Acquisitions, by Acquisition [Table] Schedule of Business Acquisitions, by Acquisition [Table] Business Acquisition [Axis] Business Acquisition [Axis] Business Acquisition, Acquiree [Domain] Business Acquisition, Acquiree [Domain] ITG Investment Technology Group, Inc. [Member] Investment Technology Group, Inc. [Member] Business Acquisition [Line Items] Business Acquisition [Line Items] Advisory and other professional fees Advisory and other professional fees The amount of advisory and other professional fees incurred during the reporting period. Common stock, par value (in dollars per share) Common Stock, Par or Stated Value Per Share Right to receive cash (in dollars per share) Shares Converted into Right to Receive Cash Amount of cash receivable per share without interest, less any applicable withholding taxes upon cancellation and extinguishment of shares issued in acquisition. Share-based Payment Arrangement [Abstract] Schedule of Share-based Compensation Arrangements by Share-based Payment Award [Table] Schedule of Share-based Compensation Arrangements by Share-based Payment Award [Table] Plan Name [Axis] Plan Name [Axis] Plan Name [Domain] Plan Name [Domain] 2015 Management Incentive Plan Management Incentive Plan2015 [Member] Represents information pertaining to 2015 Management Incentive Plan. Share-based Compensation Arrangement by Share-based Payment Award [Line Items] Share-based Compensation Arrangement by Share-based Payment Award [Line Items] Number of Options Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding [Roll Forward] Outstanding at beginning of period (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Number Granted (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Gross Exercised (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period Forfeited or expired (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Options, Forfeitures and Expirations in Period Outstanding at end of period (in shares) Weighted Average Exercise Price Per Share Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price [Abstract] Outstanding at beginning of period (in dollars per share) Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price Granted (in dollars per share) Share-based Compensation Arrangements by Share-based Payment Award, Options, Grants in Period, Weighted Average Exercise Price Exercised (in dollars per share) Share-based Compensation Arrangements by Share-based Payment Award, Options, Exercises in Period, Weighted Average Exercise Price Outstanding at end of period (in dollars per share) Weighted Average Remaining Contractual Life Share-based Compensation Arrangement by Share-based Payment Award, Options, Additional Disclosures [Abstract] Weighted Average Remaining Contractual Life Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Remaining Contractual Term Weighted Average Remaining Contractual Life, Granted Share-Based Compensation Arrangement By Share-Based Payment Award, Options, Grants In Period, Weighted Average Remaining Contractual Term Share-Based Compensation Arrangement By Share-Based Payment Award, Options, Grants In Period, Weighted Average Remaining Contractual Term Options Exercisable, Number of Options (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Number Options Exercisable, Weighted Average Exercise Price (in dollars per share) Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Weighted Average Exercise Price Fair Value Disclosures [Abstract] Fair Value, Recurring and Nonrecurring [Table] Fair Value, Recurring and Nonrecurring [Table] Financial Instrument [Axis] Financial Instrument [Axis] Financial Instruments [Domain] Financial Instruments [Domain] Equity securities Equity Securities [Member] U.S. and Non-U.S. government obligations U S And Non U S Government Obligations [Member] Represents information pertaining to the U.S. and non-US government obligations. Repurchase Agreements and Similar Transactions, Maturity Periods [Axis] Repurchase Agreements and Similar Transactions, Maturity Periods [Axis] Repurchase Agreements and Similar Transactions, Maturity Periods [Domain] Repurchase Agreements and Similar Transactions, Maturity Periods [Domain] Overnight and Continuous Overnight And Continuous [Member] Represents remaining contractual maturity of overnight and continuous. Less than 30 days Maturity Less than 30 Days [Member] 30 - 60 days Maturity30 To60 Days [Member] Maturity period that is more than 29 days but fewer than 61 days from the reporting date for repurchase agreements and similar transactions, for example, but not limited to, securities lending arrangements. 61 - 90 Days Maturity61 To90 Days [Member] Maturity period that is more than 60 days but fewer than 91 days from the reporting date for repurchase agreements and similar transactions, for example, but not limited to, securities lending arrangements. Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] Remaining contractual maturity for securities sold under agreements to repurchase Repurchase Agreement Remaining Contractual Maturity Remaining contractual maturity for repurchase agreements. Remaining contractual maturity for securities loaned Securities Lending Transaction Remaining Contractual Maturity Remaining contractual maturity for securities lending transactions. Reconciliation of cash and cash equivalents Schedule of Cash and Cash Equivalents [Table Text Block] Restrictions on cash and cash equivalents Restrictions on Cash and Cash Equivalents [Table Text Block] Offsetting Liabilities [Table] Offsetting Liabilities [Table] Derivative Instrument [Axis] Derivative Instrument [Axis] Derivative Contract [Domain] Derivative Contract [Domain] Currency forwards Foreign Exchange Forward [Member] Options Options Held [Member] Offsetting Liabilities [Line Items] Offsetting Liabilities [Line Items] Securities loaned Offsetting Securities Loaned [Abstract] Gross Amounts of Recognized Liabilities Securities Loaned, Gross Net Amounts of Liabilities Presented in the Condensed Consolidated Statement of Financial Condition Securities Loaned Gross Amounts Not Offset in the Condensed Consolidated Statement of Financial Condition Securities Loaned Gross Amounts Not Offset [Abstract] Financial Instruments Securities Loaned Not Offset Financial Instruments Represents the amount of securities loaned that could be offset by securities borrowed subject to master netting arrangements, but management elects not to offset. Cash Collateral Pledged Securities Loaned, Collateral, Right to Reclaim Cash Net Amount Securities Loaned Net Represents the net amount of securities loaned after the effects of master netting arrangements and collateral. Securities sold under agreements to repurchase Offsetting Securities Sold under Agreements to Repurchase [Abstract] Gross Amounts of Recognized Liabilities Securities Sold under Agreements to Repurchase, Gross Net Amounts of Liabilities Presented in the Condensed Consolidated Statement of Financial Condition Securities Sold under Agreements to Repurchase Gross Amounts Not Offset in the Condensed Consolidated Statement of Financial Condition Securities Sold under Agreements to Repurchase Gross Amounts Not Offset [Abstract] Financial Instruments Securities Sold under Agreements to Repurchase Not Offset Financial Instruments Represents the amount of securities sold under agreements to repurchase that could be offset by securities purchased under agreements to resell subject to master netting arrangements, but management elects not to offset. Cash Collateral Pledged Securities Sold under Agreements to Repurchase, Collateral, Right to Reclaim Cash Net Amount Securities Sold under Agreements to Repurchase Net Represents the net amount of securities sold under repurchase agreements after the effects of master netting arrangements and collateral. Trading liabilities, at fair value: Offsetting Trading Liabilities at Fair Value [Abstract] Gross Amounts of Recognized Liabilities Derivative Liability, Fair Value, Gross Liability Gross Amounts Offset in the Condensed Consolidated Statement of Financial Condition Derivative Liability, Fair Value, Gross Asset Net Amounts of Liabilities Presented in the Condensed Consolidated Statement of Financial Condition Derivative Liability Gross Amounts Not Offset in the Condensed Consolidated Statement of Financial Condition Derivative Fair Value of Derivative Liability Gross Amounts Not Offset [Abstract] Financial Instruments Derivative Liabilities Not Offset Financial Instruments Represents the amount of derivative liabilities that could be offset by derivative assets subject to master netting arrangements, but management elects not to offset. Cash Collateral Pledged Derivative, Collateral, Right to Reclaim Cash Net Amount Derivative Fair Value of Derivative Liability after Application of Master Netting Agreements and Cash and Securities Collateral Represents the fair value of derivative liabilities, net of master netting arrangements and collateral. Total Offsetting Derivative Liability, Securities Sold under Agreements to Repurchase, Securities Loaned [Abstract] Gross Amounts of Recognized Liabilities Derivative Liability, Securities Sold under Agreements to Repurchase, Securities Loaned, Gross Gross Amounts Offset in the Condensed Consolidated Statement of Financial Condition Derivative Liability, Securities Sold under Agreements to Repurchase, Securities Loaned, Asset Net Amounts of Liabilities Presented in the Condensed Consolidated Statement of Financial Condition Derivative Liability, Securities Sold under Agreements to Repurchase, Securities Loaned Gross Amounts Not Offset in the Condensed Consolidated Statement of Financial Condition Derivative Liability Securities Sold under Agreements to Repurchase Securities Loaned Gross Amounts Not Offset [Abstract] Financial Instruments Derivative Liability Securities Sold under Agreements to Repurchase Securities Loaned Not Offset Financial Instruments Represents the amount of derivative liabilities, securities sold under agreements to repurchase and securities loaned that could be offset by assets subject to master netting arrangements, but management elects not to offset. Cash Collateral Pledged Derivative Liability, Securities Sold under Agreements to Repurchase, Securities Loaned, Collateral, Right to Reclaim Cash Net Amount Derivative Liability Securities Sold under Agreements to Repurchase Securities Loaned Net Represents the fair value of derivative liabilities, securities sold under agreements to repurchase and securities loaned, net of master netting arrangements and collateral. Share-based Compensation Share-based Payment Arrangement [Text Block] Financial Assets and Liabilities Fair Value Disclosures [Text Block] Use of Estimates Use of Estimates, Policy [Policy Text Block] Earnings Per Share Earnings Per Share, Policy [Policy Text Block] Cash and Cash Equivalents Cash and Cash Equivalents, Policy [Policy Text Block] Securities Borrowed and Securities Loaned Securities Borrowed and Loaned Policy [Policy Text Block] Securities Purchased Under Agreements to Resell and Securities Sold Under Agreements to Repurchase Repurchase and Resale Agreements Policy [Policy Text Block] Receivables from/Payables to Broker-dealers and Clearing Organizations Receivables from or Payables to Broker Dealers and Clearing Organizations [Policy Text Block] Disclosure of accounting policy for receivables from or payables to broker-dealers and clearing organizations. Financial Instruments Owned Including Those Pledged as Collateral and Financial Instruments Sold, Not Yet Purchased Fair Value of Financial Instruments, Policy [Policy Text Block] Fair Value Measurements Fair Value Measurement, Policy [Policy Text Block] Fair Value Option Fair Value Option [Policy Text Block] Disclosure of accounting policy for fair value election for certain eligible financial assets and liabilities. Derivative Instruments Derivatives, Policy [Policy Text Block] Client Commission Arrangements Client Commission Arrangements [Policy Text Block] Client Commission Arrangements [Policy Text Block] Property and Equipment Property, Plant and Equipment, Policy [Policy Text Block] Capitalized Software Internal Use Software, Policy [Policy Text Block] Leases Lessee, Leases [Policy Text Block] Goodwill Goodwill and Intangible Assets, Goodwill, Policy [Policy Text Block] Intangible Assets Goodwill and Intangible Assets, Intangible Assets, Policy [Policy Text Block] Exchange Memberships and Stock Exchange Memberships, Policy [Policy Text Block] Trading Income, net Trading Income [Policy Text Block] Disclosure of accounting policy for trading income. Commissions, net and Technology Services Commissions Net And Technology Services [Policy Text Block[ Disclosure of accounting policy for commissions, net and technology services. Interest and Dividends Income/Interest and Dividends Expense Interest and Dividends Income or Expense [Policy Text Block] Disclosure of accounting policy for interest and dividends income and interest and dividends expense. Brokerage, Exchange and Clearance Fees, Net Brokerage Exchange And Clearance Fees Net [Policy Text Block] Disclosure of accounting policy for brokerage, exchange and clearance fees, net. Payments for Order Flow Payments for Order Flow [Policy Text Block] Disclosure of accounting policy for payments for order flow. Income Taxes Income Tax, Policy [Policy Text Block] Comprehensive Income and Foreign Currency Translation Comprehensive Income, Policy [Policy Text Block] Share-Based Compensation Share-based Payment Arrangement [Policy Text Block] Variable Interest Entities Consolidation, Variable Interest Entity, Policy [Policy Text Block] Accounting Pronouncements, Recently Adopted and Accounting Pronouncements, Not Yet Adopted New Accounting Pronouncements, Policy [Policy Text Block] Revenue Recognition Revenue from Contract with Customer [Policy Text Block] Goodwill and Intangible Assets Disclosure [Abstract] Schedule of Goodwill [Table] Schedule of Goodwill [Table] Goodwill [Line Items] Goodwill [Line Items] Number of operating segments Number of Operating Segments Number of non-operating segments Number Of Non-Operating Segments Number Of Non-Operating Segments Goodwill Goodwill Goodwill impairment Goodwill, Impairment Loss Intangible assets Intangible Assets, Net (Excluding Goodwill) Intangible assets acquired Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Finite-Lived Intangibles Amortization expense relating to finite-lived intangible assets Amortization of Intangible Assets Goodwill and Intangible Assets Goodwill and Intangible Assets Disclosure [Text Block] Tax Receivable Agreements [Abstract] Tax Receivable Agreements [Abstract] Class B Common Class B [Member] Class C Common Class C [Member] Class D Common Class D [Member] Represents the information pertaining to classification of common stock that has different rights than provided to Class A or B or C shares, representing ownership interest in a corporation. Payment on applicable cash tax savings (as a percent) Tax Receivable Agreement Payments Percentage Of Cash Tax Savings Represents the percentage of applicable cash tax savings, which the entity will pay to the counterparty under the terms of the agreement. First payment made First Payment Made Under Tax Receivable Agreement Company made its first payment under the tax receivable agreement. Minimum tax receivable agreement obligation over the agreed period Tax Receivable Agreement, Obligations Over Period, Minimum Yearly Payment Range Represents the minimum range of yearly payment on the carrying amount on the reporting date of the obligations relating to the tax receivable agreement to be paid over the agreed period. Maximum tax receivable agreement obligation over the agreed period Tax Receivable Agreement, Obligations Over Period, Maximum Yearly Payment Range Represents the maximum range of yearly payment on the carrying amount on the reporting date of the obligations relating to the tax receivable agreement to be paid over the agreed period. Period over which the obligations are to be settled Tax Receivable Agreement, Obligations, Settlement Term Represents the term of settlement of obligations under the tax receivable agreement. Deferred tax asset from tax receivable agreement Deferred Tax Asset, Tax Receivable Agreement Deferred Tax Asset, Tax Receivable Agreement Tax receivable agreement obligations Tax Receivable Agreement, Obligations Represents the carrying amount on the reporting date of the obligations relating to the tax receivable agreement. Issuance of tax receivable agreements in connection with employee exchange Adjustments To Additional Paid In Capital, Increase (Decrease) In Tax Receivable Agreement Adjustments To Additional Paid In Capital, Increase (Decrease) In Tax Receivable Agreement Reduction to additional paid-in capital as a result of differences between estimate and tax returns Addition (Reduction) To Additional Paid In Capital As Result Of Differences Between Estimate And Tax Returns Amount of addition (reduction) to additional paid-in capital as a result of differences between estimate and tax returns. Deferred tax assets Deferred Tax Assets, Net of Valuation Allowance Segment Reporting [Abstract] Geographic Information and Business Segments Segment Reporting Disclosure [Text Block] Cash and equivalents Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Cash and Equivalents Cash and securities segregated under federal regulations Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Cash and Securities Segregated under Federal Regs The amount of cash and securities segregated under federal regs as of the acquisition date. Securities borrowed Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Securities Borrowed The amount of cash and securities borrowed as of the acquisition date. Receivables from broker dealers and clearing organizations Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Receivables from Broker Dealers and Clearing Organizations The amount of receivables from broker dealers as of the acquisition date. Financial instruments owned, at fair value Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Financial Assets Receivables from customers Business Combination, Recognized Identifiable Assets Acquired And Liabilities Assumed, Receivables From Customers Business Combination, Recognized Identifiable Assets Acquired And Liabilities Assumed, Receivables From Customers Property, equipment and capitalized software (net) Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Property, Plant, and Equipment Intangibles Deferred tax assets Business Combination Recognized Identifiable Assets Acquired and Liabilities Assumed, Deferred Tax Assets Operating lease right-of-use assets Business Combination, Recognized Identifiable Assets Acquired And Liabilities Assumed, Operating Lease Right-Of-Use Assets Business Combination, Recognized Identifiable Assets Acquired And Liabilities Assumed, Operating Lease Right-Of-Use Assets Other assets Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Other Noncurrent Assets Total Assets Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Assets Short-term borrowings Business Combination, Recognized Identifiable Assets Acquired And Liabilities Assumed, Short-Term Debt Business Combination, Recognized Identifiable Assets Acquired And Liabilities Assumed, Short-Term Debt Short-term borrowings Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Securities Loaned The amount of securities loaned which have been recognized as of the acquisition date. Payables to broker dealers and clearing organizations Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Payables to Broker Dealers and Clearing Organizations Amount of liabilities incurred for Payables to broker dealers and clearing organizations assumed at the acquisition date. Payables to customers Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Liabilities, Accounts Payable Financial instruments sold, not yet purchased, at fair value Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Financial Liabilities Accounts payable and accrued expenses and other liabilities Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Accounts Payable Accrued Expenses and Other Liabilities Amount of liabilities incurred for goods and services received that are used in an entity's business and related party payables, accrued expenses and other liabilities assumed at the acquisition date. Operating lease liabilities Business Combination, Recognized Identifiable Assets Acquired And Liabilities Assumed, Operating Lease Liabilities Business Combination, Recognized Identifiable Assets Acquired And Liabilities Assumed, Operating Lease Liabilities Deferred tax liabilities Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Deferred Tax Liabilities Total Liabilities Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Liabilities Total identified assets acquired, net of assumed liabilities Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Net Total Purchase Price Business Combination, Recognized Identifiable Assets Acquired, Goodwill, and Liabilities Assumed, Net Measurement Period, Assets Business Combination, Provisional Information, Initial Accounting Incomplete, Adjustment, Financial Assets Measurement Period, Liabilities Business Combination, Provisional Information, Initial Accounting Incomplete, Adjustment, Financial Liabilities Measurement Period, Total identified assets acquired, net of assumed liabilities Business Combination, Provisional Information, Initial Accounting Incomplete, Adjustment, Assets, Net Of Liabilities Business Combination, Provisional Information, Initial Accounting Incomplete, Adjustment, Assets, Net Of Liabilities Measurement Period, Goodwill Goodwill, Purchase Accounting Adjustments Fair Value, by Balance Sheet Grouping [Table] Fair Value, by Balance Sheet Grouping [Table] Measurement Basis [Axis] Measurement Basis [Axis] Fair Value Measurement [Domain] Fair Value Measurement [Domain] Portion at Fair Value Measurement [Member] Portion at Fair Value Measurement [Member] Carrying Value Portion at Other than Fair Value Measurement [Member] Fair Value Estimate of Fair Value Measurement [Member] Fair Value Hierarchy and NAV [Axis] Fair Value Hierarchy and NAV [Axis] Fair Value Hierarchy and NAV [Domain] Fair Value Hierarchy and NAV [Domain] Quoted Prices in Active Markets for Identical Assets (Level 1) Fair Value, Inputs, Level 1 [Member] Significant Other Observable Inputs (Level 2) Fair Value, Inputs, Level 2 [Member] Significant Unobservable Inputs (Level 3) Fair Value, Inputs, Level 3 [Member] Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] Assets Assets, Fair Value Disclosure [Abstract] Cash and cash equivalents Cash and Cash Equivalents, at Carrying Value Cash restricted or segregated under regulations and other Restricted Cash Securities borrowed Securities Borrowed Securities purchased under agreements to resell Securities Purchased under Agreements to Resell Receivables from broker-dealers and clearing organizations Receivables from Brokers-Dealers and Clearing Organizations Total assets Assets Liabilities Liabilities, Fair Value Disclosure [Abstract] Short-term borrowings Short-term Debt Long-term borrowings Securities loaned Securities sold under agreements to repurchase Payables to broker-dealers and clearing organizations Broker-Dealer, Payable to Other Broker-Dealer and Clearing Organization Total liabilities Liabilities Short-term bank loans Short-term Bank Loans and Notes Payable Weighted average interest rate Short-term Debt, Weighted Average Interest Rate, at Point in Time Commitments and Contingencies Disclosure [Abstract] Commitments, Contingencies and Guarantees Commitments and Contingencies Disclosure [Text Block] Segments [Axis] Segments [Axis] Segments [Domain] Segments [Domain] Execution Services Execution Services Segment [Member] Information pertaining to the reportable segment of the entity representing Execution Services. Total cash consideration Payments to Acquire Businesses, Gross Acquisition value (in dollars per share) Business Acquisition, Share Price Due to and from Broker-Dealers and Clearing Organizations [Abstract] Summary of receivables from and payables to brokers-dealers and clearing organizations Schedule of Due to (from) Broker-Dealers and Clearing Organizations [Table Text Block] Earnings Per Share [Abstract] Reconciliation of net income before minority interest to net income available for common stockholders Net Income (Loss) Attributable to Parent [Abstract] Income (loss) before income taxes and noncontrolling interest Income (Loss) from Continuing Operations before Income Taxes, Noncontrolling Interest Provision for (benefit from) income taxes Income Tax Expense (Benefit) Net income (loss) Net Income (Loss), Including Portion Attributable to Noncontrolling Interest Noncontrolling interest Net Income (Loss) Attributable to Noncontrolling Interest Net income (loss) available for common stockholders Net Income (Loss) Attributable to Parent Derivative Instruments and Hedging Activities Disclosure [Abstract] Fair Values Derivatives, Balance Sheet Location, by Derivative Contract Type [Table] Fair Values Derivatives, Balance Sheet Location, by Derivative Contract Type [Table] Equities futures Equities Futures [Member] Represents information pertaining to equities futures. Commodity futures Commodity Contract [Member] Currency futures Foreign Exchange Future [Member] Fixed income futures Fixed Income Interest Rate [Member] Hedging Designation [Axis] Hedging Designation [Axis] Hedging Designation [Domain] Hedging Designation [Domain] Derivative instruments not designated as hedging instruments Not Designated as Hedging Instrument [Member] Derivative instruments designated as hedging instruments Designated as Hedging Instrument [Member] Balance Sheet Location [Axis] Balance Sheet Location [Axis] Balance Sheet Location [Domain] Balance Sheet Location [Domain] Receivables from broker-dealers and clearing organizations Receivables From Broker Dealers And Clearing Organizations [Member] Primary financial statement caption encompassing receivables from broker-dealers and clearing organizations. Financial instruments owned Financial Instruments Owned [Member] Primary financial statement caption encompassing financial instruments owned. Payables to broker-dealers and clearing organizations Payables To Broker Dealers And Clearing Organizations [Member] Primary financial statement caption encompassing payables to broker-dealers and clearing organizations. Financial instruments sold, not yet purchased Securities Sold, Not yet Purchased [Member] Derivatives, Fair Value [Line Items] Derivatives, Fair Value [Line Items] Derivatives Assets, Fair Value Derivative Asset, Fair Value, Gross Asset Derivatives Liabilities, Fair Value Derivatives Assets, Notional Derivative Asset, Notional Amount Derivatives Liabilities, Notional Derivative Liability, Notional Amount Assumed Awards Amended And Restated ITG 2007 Equity Plan [Member] Amended And Restated ITG 2007 Equity Plan [Member] Number of shares of stock authorized Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Authorized Number of shares remaining to be issued Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Available for Grant VFH V F H Parent L L C [Member] Represents information pertaining to VFH Parent LLC, a wholly owned subsidiary of Virtu Financial LLC and the sole stockholder of the reporting entity. Acquisition Borrower Acquisition Borrower [Member] Acquisition Borrower [Member] Long-term Debt, Type [Axis] Long-term Debt, Type [Axis] Long-term Debt, Type [Domain] Long-term Debt, Type [Domain] Term Loan Term Loan [Member] Term Loan [Member] Revolving Credit Facility Letter of Credit Letter of Credit [Member] Swingline Subfacility Swingline Subfacility [Member] Swingline Subfacility [Member] Senior Secured First Lien Term Loan Senior Secured First Lien Term Loan [Member] Senior Secured First Lien Term Loan [Member] Debt Instrument [Axis] Debt Instrument [Axis] Debt Instrument, Name [Domain] Debt Instrument, Name [Domain] First Lien Term Loan Facility First Lien Term Loan Facility [Member] First Lien Term Loan Facility [Member] Senior Secured Credit Facility Fourth Amendment Senior Secured Credit Facility Fourth Amendment [Member] Represents the information pertaining to senior secured credit facility fourth amendment . Variable Rate Scenario [Axis] Variable Rate Scenario [Axis] Variable Rate Scenario [Axis] Variable Rate Scenario [Domain] Variable Rate Scenario [Domain] [Domain] for Variable Rate Scenario [Axis] Scenario 1 Variable Rate, Scenario 1 [Member] Variable Rate, Scenario 1 Scenario 2 Variable Rate, Scenario 2 [Member] Variable Rate, Scenario 2 [Member] Variable Rate [Axis] Variable Rate [Axis] Variable Rate [Domain] Variable Rate [Domain] Overnight Bank Funding Rate Overnight Bank Funding Rate [Member] Overnight Bank Funding Rate [Member] LIBOR London Interbank Offered Rate (LIBOR) [Member] Statistical Measurement [Axis] Statistical Measurement [Axis] Statistical Measurement [Domain] Statistical Measurement [Domain] Maximum Maximum [Member] Minimum Minimum [Member] Aggregate principal amount Proceeds from borrowings Proceeds from Issuance of Debt Maximum borrowing capacity Line of Credit Facility, Maximum Borrowing Capacity Repayment of debt Repayments of Long-term Debt Outstanding principal amount Basis spread on variable rate (as a percent) Debt Instrument, Basis Spread on Variable Rate Basis spread on variable rate, stepdown (as a percent) Debt Instrument, Basis Spread on Variable Rate. Stepdown Debt Instrument, Basis Spread on Variable Rate. Stepdown Commitment fee (as a percent) Line of Credit Facility, Unused Capacity, Commitment Fee Percentage Commitment fee stepdown (as a percent) Line Of Credit Facility, Unused Capacity, Stepdown In Commitment Fee Percentage Line Of Credit Facility, Unused Capacity, Stepdown In Commitment Fee Percentage Repayment requirement, minimum amount Line Of Credit, Repayment Requirement, Minimum Amount Line Of Credit, Repayment Requirement, Minimum Amount Term maturity date, period Line Of Credit, Term Maturity Date, Period Line Of Credit, Term Maturity Date, Period Debt amortization, percentage of original aggregate principal amount Debt Amortization, Percentage Of Aggregate Principal Amount Debt Amortization, Percentage Of Aggregate Principal Amount Revolving maturity date, period Line Of Credit, Revolving Maturity Date, Period Line Of Credit, Revolving Maturity Date, Period Summary of nonconsolidated VIE Equity Method Investments [Table Text Block] Schedule of total revenues by geographic area Revenue from External Customers by Geographic Areas [Table Text Block] Schedule of revenues, income (loss) before income taxes (“Pre-tax earnings”) and total assets by segment Schedule of Segment Reporting Information, by Segment [Table Text Block] Statement of Stockholders' Equity [Abstract] Statement [Table] Statement [Table] Equity Components [Axis] Equity Components [Axis] Equity Component [Domain] Equity Component [Domain] Common Stock Common Stock [Member] Treasury Stock Treasury Stock, Common [Member] Additional Paid-in Capital Additional Paid-in Capital [Member] Retained Earnings (Accumulated Deficit) Retained Earnings [Member] Accumulated Other Comprehensive Income (Loss) AOCI Attributable to Parent [Member] Total Virtu Financial Inc. Stockholders' Equity Parent [Member] Non-Controlling Interest Noncontrolling Interest [Member] Statement [Line Items] Statement [Line Items] Increase (decrease) in stockholder's/members' equity Increase (Decrease) in Stockholders' Equity [Roll Forward] Balance at beginning period (in shares) Shares, Issued Balance at beginning of period Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest Share based compensation (in shares) Shares Issued, Shares, Share-based Payment Arrangement, after Forfeiture Share based compensation Shares Issued, Value, Share-based Payment Arrangement, after Forfeiture Repurchase of Class C common stock (in shares) Stock Repurchased During Period, Shares Repurchase of Class C common stock Stock Repurchased During Period, Value Treasury stock purchases (in shares) Treasury stock purchases Stock option exercised (in shares) Stock options exercised Stock Issued During Period, Value, Stock Options Exercised Net income (loss) Foreign exchange translation adjustment Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Adjustment, Net of Tax Distribution from Virtu Financial to non-controlling interest Noncontrolling Interest, Decrease from Distributions to Noncontrolling Interest Holders Dividends Dividends, Common Stock Issuance of common stock in connection with employee exchanges (in shares) Stock Issued During Period, Shares, Employee Exchanges Stock Issued During Period, Shares, Employee Exchanges Issuance of Common Stock in connection with secondary offering, net of offering costs (in shares) Stock Issued During Period Secondary Offering Shares New Issues Number of new stock issued during the period in a secondary offering. Issuance of Common Stock in connection with secondary offering, net of offering costs Stock Issued During Period Secondary Offering Value New Issues Equity impact of the value of new stock issued during the period in a secondary public offering. Repurchase of Virtu Financial Units and corresponding number of Class C common stock in connection with employee exchanges (in shares) Common Units Repurchased During Period In Secondary Offering Shares Number of members interests that have been repurchased during the period as part of a secondary offering and have not been retired and are not held in treasury. Issuance of tax receivable agreements in connection with employee exchange Balance at end of period (in shares) Balance at end of period Minimum initial collateral advanced or received expressed as a percentage of fair value of the underlying securities borrowed or loaned Securities Borrowed and Securities Loaned Minimum Initial Collateral Advanced or Received Expressed as Percentage of Fair Value of Underlying Securities Borrowed or Loaned Represents the minimum initial collateral advanced or received expressed as a percentage of fair value of the underlying securities borrowed or loaned. Leases [Abstract] Leases Lessee, Operating Leases [Text Block] Leases Lessee, Finance Leases [Text Block] Schedule of Acquired Finite-Lived Intangible Asset by Major Class [Table] Schedule of Acquired Finite-Lived Intangible Asset by Major Class [Table] Finite-Lived Intangible Assets by Major Class [Axis] Finite-Lived Intangible Assets by Major Class [Axis] Finite-Lived Intangible Assets, Major Class Name [Domain] Finite-Lived Intangible Assets, Major Class Name [Domain] Purchased technology Unpatented Technology [Member] ETF issuer relationships Exchange Traded Funds Issuer Relationships [Member] Represents information pertaining to relationships with issuer for exchange traded funds. ETF buyer relationships Exchange Traded Funds Buyer Relationships [Member] Represents information pertaining to relationships with buyer for exchange traded funds. Technology Developed Technology Rights [Member] Customer relationships Customer Relationships [Member] Trade name Trade Names [Member] Favorable occupancy leases Off-Market Favorable Lease [Member] Indefinite-lived Intangible Assets [Axis] Indefinite-lived Intangible Assets [Axis] Indefinite-lived Intangible Assets, Major Class Name [Domain] Indefinite-lived Intangible Assets, Major Class Name [Domain] Exchange memberships Exchange Memberships [Member] Represents information related to exchange memberships. Acquired Intangible Assets [Line Items] Acquired Finite-Lived Intangible Assets [Line Items] Gross Carrying Amount Finite-Lived Intangible Assets, Gross Accumulated Amortization Finite-Lived Intangible Assets, Accumulated Amortization Net Carrying Amount Finite-Lived Intangible Assets, Net Useful Lives (Years) Finite-Lived Intangible Asset, Useful Life Exchange memberships Indefinite-lived Intangible Assets (Excluding Goodwill) Gross Carrying Amount Intangible Assets, Gross (Excluding Goodwill) Net Carrying Amount Revenues Business Acquisition, Pro Forma Revenue Income (loss) before income taxes Business Acquisition, Pro Forma Income (Loss), Before Tax Amount before tax of pro forma income from operations as if the business combination had been completed at the beginning of a period. Schedule of Revenues from External Customers and Long-Lived Assets [Table] Schedule of Revenues from External Customers and Long-Lived Assets [Table] Geographical [Axis] Geographical [Axis] Geographical [Domain] Geographical [Domain] United States UNITED STATES Ireland IRELAND United Kingdom UNITED KINGDOM Singapore SINGAPORE Canada CANADA Australia AUSTRALIA Others Other Countries [Member] Represents information related to other countries not listed separately. Disposal Group Name [Axis] Disposal Group Name [Axis] Disposal Group Name [Domain] Disposal Group Name [Domain] BondPoint BondPoint [Member] BondPoint [Member] Disposal Group Classification [Axis] Disposal Group Classification [Axis] Disposal Group Classification [Domain] Disposal Group Classification [Domain] Disposal Group, Disposed of by Sale, Not Discontinued Operations Disposal Group, Disposed of by Sale, Not Discontinued Operations [Member] Revenues from External Customers [Line Items] Revenues from External Customers and Long-Lived Assets [Line Items] Total revenue Revenues Gain on sale of BondPoint Disposal Group, Not Discontinued Operation, Gain (Loss) on Disposal, Excluding Transaction Costs Disposal Group, Not Discontinued Operation, Gain (Loss) on Disposal, Excluding Transaction Costs Receivables from/Payables to Broker-Dealers and Clearing Organizations Due to and from Broker-Dealers and Clearing Organizations Disclosure [Text Block] Statement of Financial Position [Abstract] Assets Assets [Abstract] Receivables from broker-dealers and clearing organizations Trading assets, at fair value: Financial Instruments, Owned, at Fair Value [Abstract] Financial instruments owned Financial Instruments, Owned and Not Pledged, at Fair Value Financial instruments owned and pledged Financial Instruments, Owned and Pledged as Collateral, at Fair Value Receivables from customers Receivables from Customers Property, equipment and capitalized software (net of accumulated depreciation of $481,871 and $323,718 as of June 30, 2019 and December 31, 2018, respectively) Property, Plant and Equipment, Net Operating lease right-of-use assets Operating Lease, Right-of-Use Asset Intangibles (net of accumulated amortization of $180,172 and $148,644 as of June 30, 2019 and December 31, 2018, respectively) Deferred tax assets Deferred Income Tax Assets, Net Other assets ($49,199 and $48,273, at fair value, as of June 30, 2019 and December 31, 2018, respectively) Other Assets Liabilities and equity Liabilities and Equity [Abstract] Liabilities Liabilities [Abstract] Payables to customers Broker-Dealer, Payable to Customer Trading liabilities, at fair value: Financial Instruments Sold, Not yet Purchased, at Fair Value [Abstract] Financial instruments sold, not yet purchased Financial Instruments Sold, Not yet Purchased, at Fair Value Deferred tax liabilities Deferred Income Tax Liabilities, Net Accounts payable, accrued expenses and other liabilities Accounts Payable and Accrued Expenses and Other Liabilities Sum of the carrying values as of the balance sheet date of liabilities incurred and payable to vendors for goods and services received, expenses incurred but not paid and other liabilities not separately disclosed in the balance sheet. Operating lease liabilities Operating Lease, Liability Long-term borrowings Commitments and Contingencies (Note 15) Commitments and Contingencies Virtu Financial Inc. Stockholders' equity Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest [Abstract] Common stock (par value $0.00001) Common Stock, Value, Issued Treasury stock, at cost, 2,178,771 and 2,178,771 shares at June 30, 2019 and December 31, 2018, respectively Treasury Stock, Common, Value Additional paid-in capital Additional Paid in Capital Retained earnings Retained Earnings (Accumulated Deficit) Accumulated other comprehensive income (loss) Accumulated Other Comprehensive Income (Loss), Net of Tax Total Virtu Financial Inc. stockholders' equity Stockholders' Equity Attributable to Parent Noncontrolling interest Stockholders' Equity Attributable to Noncontrolling Interest Total equity Total liabilities and equity Liabilities and Equity Cover page. Entities [Table] Entities [Table] Entity Information [Line Items] Entity Information [Line Items] Document Type Document Type Document Quarterly Report Document Quarterly Report Document Period End Date Document Period End Date Document Transition Report Document Transition Report Entity File Number Entity File Number Entity Registrant Name Entity Registrant Name Entity Central Index Key Entity Central Index Key Current Fiscal Year End Date Current Fiscal Year End Date Document Fiscal Year Focus Document Fiscal Year Focus Document Fiscal Period Focus Document Fiscal Period Focus Amendment Flag Amendment Flag Entity Incorporation, State or Country Code Entity Incorporation, State or Country Code Entity Tax Identification Number Entity Tax Identification Number Entity Address, Address Line One Entity Address, Address Line One Entity Address, City or Town Entity Address, City or Town Entity Address, State or Province Entity Address, State or Province Entity Address, Postal Zip Code Entity Address, Postal Zip Code City Area Code City Area Code Local Phone Number Local Phone Number Entity Current Reporting Status Entity Current Reporting Status Entity Interactive Data Current Entity Interactive Data Current Entity Filer Category Entity Filer Category Entity Small Business Entity Small Business Entity Emerging Growth Company Entity Emerging Growth Company Entity Shell Company Entity Shell Company Title of 12(b) Security Title of 12(b) Security Trading Symbol Trading Symbol Security Exchange Name Security Exchange Name Entity Common Stock, Shares Outstanding Entity Common Stock, Shares Outstanding Discontinued Operations and Disposal Groups [Abstract] Sale of BondPoint Disposal Groups, Including Discontinued Operations, Disclosure [Text Block] Market Making Market Making Segment [Member] Information pertaining to the reportable segment of the entity representing Market Making. Corporate Corporate Segment [Member] Changes in goodwill Goodwill [Roll Forward] Balance at the beginning of the period Goodwill recognized in ITG Acquisition Goodwill, Acquired During Period Currency translation adjustment Goodwill, Foreign Currency Translation Gain (Loss) Balance at the end of the period First lien term loan Letter of credit Swingline subfacility Regulatory Requirement Regulatory Capital Requirement [Text Block] The entire disclosure regarding regulatory capital requirements for the entity. Schedule of fair value of derivative instruments on a gross basis Schedule of Derivative Instruments in Statement of Financial Position, Fair Value [Table Text Block] Schedule of net gain from derivative instruments not designated as hedging instruments Derivative Instruments, Gain (Loss) [Table Text Block] Award Type [Axis] Award Type [Axis] Award Type [Domain] Award Type [Domain] RSUs Restricted Stock Units (RSUs) [Member] Number of Shares Outstanding at beginning of period (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number Granted (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period Forfeited (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Forfeited in Period Vested (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period Outstanding at end of period (in shares) Weighted Average Fair Value Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value [Abstract] Outstanding at beginning of period (in dollars per share) Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value Granted (in dollars per share) Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period, Weighted Average Grant Date Fair Value Forfeited (in dollars per share) Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Forfeitures, Weighted Average Grant Date Fair Value Vested (in dollars per share) Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period, Weighted Average Grant Date Fair Value Outstanding at end of period (in dollars per share) Schedule of Segment Reporting Information, by Segment [Table] Schedule of Segment Reporting Information, by Segment [Table] Market Making Execution Services Corporate Segment Reporting Information [Line Items] Segment Reporting Information [Line Items] Income (loss) before income taxes and noncontrolling interest Asset Class [Axis] Asset Class [Axis] Asset Class [Domain] Asset Class [Domain] Equity investment Fair Value Option Investment [Member] Represents the information pertaining to fair value option investment. Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward] Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward] Beginning Balance Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset Value Purchases Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Purchases Total Realized and Unrealized Gains / (Losses) Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Earnings Net Transfers into (out of) Level 3 Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Transfers, Net Settlement Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Settlements Ending Balance Change in Net Unrealized Gains / (Losses) on Investments still held at end of period Fair Value, Asset, Recurring Basis, Still Held, Unrealized Gain (Loss) Accumulated depreciation Accumulated Depreciation, Depletion and Amortization, Property, Plant, and Equipment Intangibles, accumulated amortization Fair value of other assets Other Assets, Fair Value Disclosure Treasury stock, shares (in shares) Treasury Stock, Common, Shares Common stock, par value (in dollars per share) Common stock, shares authorized (in shares) Common Stock, Shares Authorized Common stock, shares issued (in shares) Common Stock, Shares, Issued Common stock, shares outstanding (in shares) Common Stock, Shares, Outstanding Schedule of Antidilutive Securities Excluded from Computation of Earnings Per Share [Table] Schedule of Antidilutive Securities Excluded from Computation of Earnings Per Share [Table] Antidilutive Securities [Axis] Antidilutive Securities [Axis] Antidilutive Securities, Name [Domain] Antidilutive Securities, Name [Domain] Stock options Share-based Payment Arrangement, Option [Member] Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items] Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items] Diluted earnings (loss) per share: Earnings Per Share, Diluted [Abstract] Net income (loss) available for common stockholders, net of dividends and undistributed earnings allocated to participating securities Net Income (Loss) Available to Common Stockholders, Diluted Weighted average shares of common stock outstanding: Weighted Average Number of Shares Outstanding, Diluted [Abstract] Issued and outstanding (in shares) Weighted Average Number of Shares Outstanding, Basic Issuable pursuant to 2015 Management Incentive Plan (in shares) Incremental Common Shares Attributable to Dilutive Effect of Share-based Payment Arrangements Weighted average shares of common stock outstanding (in shares) Weighted Average Number of Shares Outstanding, Diluted Diluted earnings (loss) per share (in dollars per share) Earnings Per Share, Diluted Dilutive impact excluded from computation of earnings per share (in shares) Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount Lease assets and liabilities Assets And Liabilities, Lessee [Table Text Block] Assets And Liabilities, Lessee [Table Text Block] Lease term, discount rate and components of lease expense Lease, Cost [Table Text Block] Future minimum lease payments under operating leases Lessee, Operating Lease, Liability, Maturity [Table Text Block] Future minimum lease payments under finance leases Finance Lease, Liability, Maturity [Table Text Block] Number of days prior to the grant that common stock and restricted stock units fair value is determined based on Common Stock And Restricted Stock Units Number Of Days Preceding Grant Fair Value Is Based On The number of days prior to the grant that common stock and restricted stock units fair value is determined based on. Assumed Plan Assumed Plan [Member] Assumed Plan [Member] Vesting period Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period Expiration period Share-based Compensation Arrangement by Share-based Payment Award, Expiration Period Expense recognized Share-based Payment Arrangement, Expense Unrecognized share-based compensation expense Share-based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Amount Weighted average period for compensation expense expected to be recognized Share-based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Period for Recognition Shares available for issuance Common Stock, Capital Shares Reserved for Future Issuance Revenue from Contract with Customer [Abstract] Disaggregation of revenue Disaggregation of Revenue [Table Text Block] Related Party Transactions [Abstract] Related Party Transactions Related Party Transactions Disclosure [Text Block] Disaggregation of Revenue [Table] Disaggregation of Revenue [Table] Product and Service [Axis] Product and Service [Axis] Product and Service [Domain] Product and Service [Domain] Commissions, net Commissions, Net [Member] Commissions, Net [Member] Workflow technology Workflow Technology [Member] Workflow Technology [Member] Analytics Analytics [Member] Analytics [Member] Other sources of revenue Other Sources [Member] Other Sources [Member] Timing of Transfer of Good or Service [Axis] Timing of Transfer of Good or Service [Axis] Timing of Transfer of Good or Service [Domain] Timing of Transfer of Good or Service [Domain] Services transferred at a point in time Transferred at Point in Time [Member] Services transferred over time Transferred over Time [Member] Disaggregation of Revenue [Line Items] Disaggregation of Revenue [Line Items] Revenues from contract with customers Revenue from Contract with Customer, Excluding Assessed Tax Revenue related to performance obligations satisfied in previous periods Contract with Customer, Performance Obligation Satisfied in Previous Period Receivables related to revenue from contracts with customers Contract with Customer, Asset, after Allowance for Credit Loss Impairment losses on receivables Contract with Customer, Asset, Credit Loss Expense (Reversal) Deferred revenue related to contracts with customers Contract with Customer, Liability Revenue recognized Contract with Customer, Liability, Revenue Recognized Sale of Stock [Axis] Sale of Stock [Axis] Sale of Stock [Domain] Sale of Stock [Domain] Selling Stockholders Over-Allotment Option [Member] Number of shares issued (in shares) Purchase price per share (in dollars per share) Shares Issued, Price Per Share Offering price per share (in dollars per share) Shares Issued, Offering Price Per Share Shares Issued, Offering Price Per Share Number of shares of stock issued (in shares) Stock Issued During Period, Shares, New Issues Number of shares issued upon exercise of stock options (in shares) Schedule of Finite-Lived Intangible Assets [Table] Schedule of Finite-Lived Intangible Assets [Table] Technology Technology-Based Intangible Assets [Member] Trade names Amounts preliminarily allocated to intangible assets, the amortization period and goodwill Intangible Assets, Net (Including Goodwill) [Abstract] Intangible assets Total Intangible Assets, Net (Including Goodwill) Amortization Years Finite-Lived Intangible Assets, Remaining Amortization Period Schedule of Related Party Transactions, by Related Party [Table] Schedule of Related Party Transactions, by Related Party [Table] Investment, Name [Axis] Investment, Name [Axis] Investment, Name [Domain] Investment, Name [Domain] SBI S B I Japannext [Member] Represents information related to SBI Japannext Co., Ltd, an equity method investment of the entity. Related Party [Axis] Related Party [Axis] Related Party [Domain] Related Party [Domain] Two microwave communication network JVs Microwave Communication Network Joint Ventures [Member] Represents information related to microwave communication network joint ventures. Level 3 Level3 Communications [Member] Represents information related to Level 3 Communications, an affiliate of the entity. Related Party Transaction [Line Items] Related Party Transaction [Line Items] Payable to affiliates Due to Affiliate Payments to related party Related Party Transaction, Amounts of Transaction Number of microwave communication network JVs the Company makes payments to Number Of Microwave Communication Network Joint Ventures Payments Made To The number of microwave communication network joint ventures that the company makes payments to. Payments for purchases Payments to Suppliers Deferred tax liabilities Deferred Tax Liabilities, Gross Operating leases Lessee, Operating Lease, Description [Abstract] Operating lease right-of-use assets Operating lease liabilities Finance leases Lessee, Finance Lease, Description [Abstract] Property and equipment, at cost Finance Lease, Right-Of-Use Asset, Gross Finance Lease, Right-Of-Use Asset, Gross Accumulated depreciation Finance Lease, Right-Of-Use Asset, Accumulated Depreciation Finance Lease, Right-Of-Use Asset, Accumulated Depreciation Finance lease liabilities Finance Lease, Liability, Current Organization, Consolidation And Presentation Of Financial Statements [Table] Organization, Consolidation And Presentation Of Financial Statements [Table] Organization, Consolidation And Presentation Of Financial Statements [Table] Virtu Financial Virtu Financial Llc [Member] Represents information related to Virtu Financial LLC, a limited liability company that is managed by the reporting entity. Organization, Consolidation And Presentation Of Financial Statements [Line Items] Organization, Consolidation And Presentation Of Financial Statements [Line Items] [Line Items] for Organization, Consolidation And Presentation Of Financial Statements [Table] Ownership interest (as a percent) Equity Method Investment, Ownership Percentage Number of countries in which entity operates Number of Countries in which Entity Operates 2019 Long-term Debt, Maturities, Repayments of Principal, Remainder of Fiscal Year 2020 Long-term Debt, Maturities, Repayments of Principal in Year Two 2021 Long-term Debt, Maturities, Repayments of Principal in Year Three 2022 Long-term Debt, Maturities, Repayments of Principal in Year Four 2023 and thereafter Long-Term Debt, Maturities, Repayments Of Principal In Year Five And After Long-Term Debt, Maturities, Repayments Of Principal In Year Five And After Total principal of long-term borrowings Interest expense Interest Expense, Debt Collateralized Agreements [Abstract] Collateralized Transactions Collateralized Agreements [Text Block] The entire disclosure for collateralized transactions. Number of shares of stock authorized (in shares) Schedule of goodwill by segment Schedule of Goodwill [Table Text Block] Schedule of acquired intangible assets Schedule of Acquired Finite-Lived Intangible Assets by Major Class [Table Text Block] Derivative Instruments Derivative Instruments and Hedging Activities Disclosure [Text Block] Tax Receivable Agreements Tax Receivable Agreements Disclosure [Text Block] The entire disclosure for tax receivable agreements. Short-Term Credit Facilities Short Term Credit Facilities [Member] Represents the information pertaining to the short term credit facility. Senior Secured Credit Facility Senior Secured Credit Facility [Member] Represents information pertaining to the senior secured credit facility. Outstanding borrowings and financing capacity or unused available capacity under the Company’s borrowing arrangements Schedule of Debt [Table Text Block] Schedule of interest expense on debt Schedule Of Interest Expense On Debt [Table Text Block] Tabular disclosure of interest expense on debt. Schedule of reconciliation of the senior secured credit facility Schedule of Long-term Debt Instruments [Table Text Block] Schedule of aggregate future required principal payments based on terms of loan Schedule of Maturities of Long-term Debt [Table Text Block] Derivative Instruments, Gain (Loss) [Table] Derivative Instruments, Gain (Loss) [Table] Futures Future [Member] Foreign exchange - forward contract Forward Contracts [Member] Not designated as hedging instruments Derivative instruments designed as hedging instruments: Derivative Instruments, Gain (Loss) [Line Items] Derivative Instruments, Gain (Loss) [Line Items] Gain impact that derivative instruments not designated as hedging instruments had on results of operations Derivative, Gain (Loss) on Derivative, Net Net gain from derivative instruments, which are recorded in accumulated other comprehensive income Other Comprehensive Income (Loss), Unrealized Gain (Loss) on Derivatives Arising During Period, before Tax Statement of Cash Flows [Abstract] Class C common stock Cash flows from operating activities Net Cash Provided by (Used in) Operating Activities [Abstract] Net income (loss) Adjustments to reconcile net income to net cash provided by operating activities: Adjustments to Reconcile Net Income (Loss) to Cash Provided by (Used in) Operating Activities [Abstract] Depreciation and amortization Depreciation And Amortization Excluding Intangible Assets The current period expense charged against earnings on long-lived, physical assets not used in production, and which are not intended for resale, to allocate or recognize the cost of such assets over their useful lives. Amortization of purchased intangibles and acquired capitalized software Debt issue cost related to debt refinancing and prepayment Debt Related Commitment Fees and Debt Issuance Costs Amortization of debt issuance costs and deferred financing fees Amortization of Debt Issuance Costs and Discounts Termination of office leases Lease Abandonment Represents the amount of expense related to the lease abandonment or termination. Share based compensation Share-based Payment Arrangement, Noncash Expense Reserve for legal matters Loss Contingency, Loss in Period Write-down of assets Asset Impairment Charges Connectivity early termination Loss on Contract Termination Deferred taxes Deferred Income Tax Expense (Benefit) Gain on sale of businesses Disposal Group, Not Discontinued Operation, Gain (Loss) on Disposal Other Other Operating Activities, Cash Flow Statement Changes in operating assets and liabilities: Increase (Decrease) in Operating Capital [Abstract] Securities borrowed Increase (Decrease) in Securities Borrowed Securities purchased under agreements to resell Increase (Decrease) in Receivables under Repurchase Agreements Receivables from broker-dealers and clearing organizations Increase (Decrease) in Receivables from Brokers-Dealers and Clearing Organizations Trading assets, at fair value Increase (Decrease) in Trading Assets at Fair Value Represents the amount of increase (decrease) in fair value of trading assets. Receivables from customers Increase (Decrease) in Accounts Receivable Other assets Increase (Decrease) in Other Operating Assets Securities loaned Increase (Decrease) in Securities Loaned Transactions Securities sold under agreements to repurchase Increase (Decrease) in Payables under Repurchase Agreements Payables to broker-dealers and clearing organizations Increase (Decrease) in Payables to Broker-Dealers and Clearing Organizations Payables to customers Increase (Decrease) in Payables to Customers Trading liabilities, at fair value Increase (Decrease) in Trading Liabilities at Fair Value Represents the amount of increase (decrease) in fair value of trading liabilities. Accounts payable, accrued expenses and other liabilities Increase (Decrease) in Accounts Payable and Accrued Expenses and Other Liabilities Represents the amount of increase (decrease) in accounts payable and accrued expenses and other liabilities. Net cash provided by (used in) operating activities Net Cash Provided by (Used in) Operating Activities Cash flows from investing activities Net Cash Provided by (Used in) Investing Activities [Abstract] Development of capitalized software Payments to Develop Software Acquisition of property and equipment Payments to Acquire Property, Plant, and Equipment Proceeds from sale of BondPoint Proceeds from Divestiture of Businesses ITG Acquisition, net of cash acquired, described in Note 3 Payments to Acquire Business Two, Net of Cash Acquired Investment in joint ventures Payments to Acquire Interest in Joint Venture Net cash provided by (used in) investing activities Net Cash Provided by (Used in) Investing Activities Cash flows from financing activities Net Cash Provided by (Used in) Financing Activities [Abstract] Distribution from Virtu Financial to non-controlling interest Payments to Noncontrolling Interests Dividends Payments of Dividends Repurchase of stock Payments for Repurchase of Common Stock Stock options exercised Proceeds from Stock Options Exercised Short-term borrowings, net Proceeds from (Repayments of) Short-term Debt Proceeds from long-term borrowings Proceeds from Issuance of Long-term Debt Repayment of long term borrowings Debt issuance costs Payments of Debt Issuance Costs Issuance of common stock in connection with secondary offering, net of offering costs Proceeds (Payments) From Issuance Of Common Stock, Net Of Offering Costs Proceeds (Payments) From Issuance Of Common Stock, Net Of Offering Costs Net cash provided by (used in) financing activities Net Cash Provided by (Used in) Financing Activities Effect of exchange rate changes on cash and cash equivalents Effect of Exchange Rate on Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents Net increase (decrease) in cash and cash equivalents Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents, Period Increase (Decrease), Including Exchange Rate Effect Cash and cash equivalents beginning of period Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents Cash and cash equivalents, end of period Supplementary disclosure of cash flow information Supplemental Cash Flow Information [Abstract] Cash paid for interest Interest Paid, Excluding Capitalized Interest, Operating Activities Cash paid for taxes Income Taxes Paid, Net Non-cash investing activities Cash Flow Noncash Investing Activities Disclosure [Abstract] Share based compensation to developers relating to capitalized software Non Cash Compensation to Developers Subject to Capitalization of Software Represents the amount of non-cash compensation to developers subject to capitalization of software. Non-cash financing activities Cash Flow Noncash Financing Activities Disclosure [Abstract] Cash Flow Noncash Financing Activities Disclosure [Abstract] Tax receivable agreement described in Note 6 Noncash Financing Activities, Tax Receivable Agreement Noncash Financing Activities, Tax Receivable Agreement Operating Leases Lessee, Operating Lease, Liability, Payment, Due [Abstract] 2019 Lessee, Operating Lease, Liability, Payments, Remainder of Fiscal Year 2020 Lessee, Operating Lease, Liability, Payments, Due Year Two 2021 Lessee, Operating Lease, Liability, Payments, Due Year Three 2022 Lessee, Operating Lease, Liability, Payments, Due Year Four 2023 Lessee, Operating Lease, Liability, Payments, Due Year Five 2024 and thereafter Lessee, Operating Lease, Liability, Payments, Due after Year Five Total lease payments Lessee, Operating Lease, Liability, Payments, Due Less imputed interest Lessee, Operating Lease, Liability, Undiscounted Excess Amount Total lease liability Finance Lease, Liability, Payment, Due [Abstract] 2019 Finance Lease, Liability, Payments, Remainder of Fiscal Year 2020 Finance Lease, Liability, Payments, Due Year Two 2021 Finance Lease, Liability, Payments, Due Year Three 2022 Finance Lease, Liability, Payments, Due Year Four 2023 Finance Lease, Liability, Payments, Due Year Five 2024 and thereafter Finance Lease, Liability, Payments, Due after Year Five Total lease payments Finance Lease, Liability, Payment, Due Less imputed interest Finance Lease, Liability, Undiscounted Excess Amount Total lease liability Finance Lease, Liability 2019 Capital Leases, Future Minimum Payments Due, Next Twelve Months 2020 Capital Leases, Future Minimum Payments Due in Two Years 2021 Capital Leases, Future Minimum Payments Due in Three Years 2022 Capital Leases, Future Minimum Payments Due in Four Years 2023 Capital Leases, Future Minimum Payments Due in Five Years Thereafter Capital Leases, Future Minimum Payments Due Thereafter Total minimum lease payments Capital Leases, Future Minimum Payments Due 2019 Operating Leases, Future Minimum Payments Due, Next Twelve Months 2020 Operating Leases, Future Minimum Payments, Due in Two Years 2021 Operating Leases, Future Minimum Payments, Due in Three Years 2022 Operating Leases, Future Minimum Payments, Due in Four Years 2023 Operating Leases, Future Minimum Payments, Due in Five Years Thereafter Operating Leases, Future Minimum Payments, Due Thereafter Total minimum lease payments Operating Leases, Future Minimum Payments Due 2019 Operating Leases, Future Minimum Payments Receivable, Current 2020 Operating Leases, Future Minimum Payments Receivable, in Two Years 2021 Operating Leases, Future Minimum Payments Receivable, in Three Years 2022 Operating Leases, Future Minimum Payments Receivable, in Four Years 2023 Operating Leases, Future Minimum Payments Receivable, in Five Years Thereafter Operating Leases, Future Minimum Payments Receivable, Thereafter Total minimum lease payments Operating Leases, Future Minimum Payments Receivable Summary of the estimated fair values of the assets acquired and liabilities assumed Schedule of Recognized Identified Assets Acquired and Liabilities Assumed [Table Text Block] Schedule of preliminary allocation of intangible assets, amortization period and goodwill Schedule of Finite-Lived Intangible Assets Acquired as Part of Business Combination [Table Text Block] Schedule of pro forma results Business Acquisition, Pro Forma Information [Table Text Block] Schedule of pro forma financial Information Schedule of Pro Forma Financial Information [Table Text Block] Tabular disclosure of pro forma financial information that combines the historical results of the entity and acquiree. Summary of fair value measurements measured on a recurring basis Schedule of Fair Value, Assets and Liabilities Measured on Recurring Basis [Table Text Block] Summary of changes in Level 3 financial instruments measured at fair value on a recurring basis Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Table Text Block] Summary of netting of certain financial assets and financial liabilities Offsetting Assets and Offsetting Liabilities [Table Text Block] Tabular disclosure of derivative and other financial assets and liabilities that are subject to offsetting, including master netting arrangements. Summary of gross obligations for repurchase agreement and securities borrowed transactions by remaining contractual maturity and class of collateral pledged Schedule Of Remaining Contractual Maturity And Class Of Collateral Pledged [Table Text Block] Tabular disclosure of information by remaining contractual maturity and class of collateral pledges. Transfers of financial instruments between levels Fair Value Assets Transfers Amount Amount of transfers of assets measured on a recurring basis in and out of the levels of fair value hierarchy. Discount rate applied to cash flow forecasts to determine initial fair value of equity method investment. Discounted Cash Flow Method Discount Rate Discount rate applied to cash flow forecasts to determine initial fair value of equity method investment. Market approach average price/earnings multiples of comparable companies to corroborate the income approach Average Price To Earnings Multiples Of Comparable Companies Market approach average price/earnings multiples of comparable companies to .the income approach. Time period of projected income to determine fair value of equity method investment Time Period Of Projected Income To Determine Fair Value Of Equity Method Investment The time period of projected income to determine fair value of equity method investment. Borrowings Debt Disclosure [Text Block] Income Statement [Abstract] Other, net Product and Service, Other [Member] Revenues: Revenues [Abstract] Trading income, net Trading Gain (Loss) Interest and dividends income Interest and Dividend Income, Operating Commissions, net and technology services Operating Expenses: Operating Expenses [Abstract] Brokerage, exchange and clearance fees, net Floor Brokerage, Exchange and Clearance Fees Communication and data processing Communications and Information Technology Employee compensation and payroll taxes Labor and Related Expense Payments for order flow Order Flow Fees Interest and dividends expense Interest and Dividend Expense Operating Represents the amount of interest and dividends expense incurred during the normal course of business. Operations and administrative General and Administrative Expense Depreciation and amortization Amortization of purchased intangibles and acquired capitalized software Termination of office leases Gain (Loss) on Contract Termination Debt issue cost related to debt refinancing and prepayment Debt Issue Cost Related To Debt Refinancing Debt issue costs related to debt refinancing. Transaction advisory fees and expenses Legal Fees Charges related to share based compensation at IPO Share-based Compensation Expense, Vested Upon Initial Public Offering The aggregate amount of noncash, equity-based employee remuneration vested upon initial public offering. Financing interest expense on long-term borrowings Total operating expenses Operating Expenses Income (loss) before income taxes and noncontrolling interest Earnings (loss) per share Basic (in dollars per share) Earnings Per Share, Basic Diluted (in dollars per share) Weighted average common shares outstanding Basic (in shares) Diluted (in shares) Comprehensive income Comprehensive Income (Loss), Net of Tax, Attributable to Parent [Abstract] Other comprehensive income (loss) Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent [Abstract] Foreign exchange translation adjustment, net of taxes Comprehensive income (loss) Comprehensive Income (Loss), Net of Tax, Including Portion Attributable to Noncontrolling Interest Less: Comprehensive income (loss) attributable to noncontrolling interest Comprehensive Income (Loss), Net of Tax, Attributable to Noncontrolling Interest Comprehensive income (loss) attributable to common stockholders Comprehensive Income (Loss), Net of Tax, Attributable to Parent Disposal Groups, Including Discontinued Operations [Table] Disposal Groups, Including Discontinued Operations [Table] Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] Proceeds from sale of BondPoint Transaction costs Disposal Group, Not Discontinued Operation, Transaction Costs Disposal Group, Not Discontinued Operation, Transaction Costs Professional fees Professional Fees Compensation expense Salary and Wage, NonOfficer, Excluding Cost of Good and Service Sold Gain on sale of BondPoint, net of transaction costs Schedule of stock options activity Share-based Payment Arrangement, Option, Activity [Table Text Block] Schedule of activity related to restricted stock units Share-based Payment Arrangement, Restricted Stock and Restricted Stock Unit, Activity [Table Text Block] Amount of fine Loss Contingency Amount Of Fine Amount of fines from regulatory agencies. Loss Contingencies [Table] Loss Contingencies [Table] Loss Contingency Nature [Axis] Loss Contingency Nature [Axis] Loss Contingency, Nature [Domain] Loss Contingency, Nature [Domain] ProShares Trust II Securities Litigation, No. 19-cv-886-DLC ProShares Trust II Securities Litigation, No. 19-CV-886-DLC [Member] ProShares Trust II Securities Litigation, No. 19-CV-886-DLC [Member] Breach of Non-Disparagement Clause by Former Employee Breach Of Non-Disparagement Clause By Former Employee [Member] Breach Of Non-Disparagement Clause By Former Employee [Member] Loss Contingencies [Line Items] Loss Contingencies [Line Items] Number of lawsuits consolidated Loss Contingency, Number Of Lawsuits Consolidated Loss Contingency, Number Of Lawsuits Consolidated Damages sought Loss Contingency, Damages Sought, Value Revenues from Contracts with Customers Revenue from Contract with Customer [Text Block] Financial Instruments Owned and Pledged as Collateral [Table] Financial Instruments Owned and Pledged as Collateral [Table] Equities Exchange traded notes Exchange Traded Notes [Member] Represents information pertaining to exchange traded notes. Financial Instruments Owned and Pledged as Collateral [Line Items] Financial Instruments Owned and Pledged as Collateral [Line Items] Securities received as collateral: Securities Received as Collateral [Abstract] Securities borrowed Securities Borrowed At Market Value Amount, after the effects of master netting arrangements, of securities borrowed from entities in exchange for collateral. Includes assets not subject to a master netting arrangement and not elected to be offset, at market value. Securities purchased under agreements to resell Federal Funds Sold and Securities Purchased under Agreements to Resell Pledged as Collateral Securities received as collateral Collateralized Agreements SBI Bonds Corporate Debt Securities [Member] Gain (loss) due to change in currency rates Foreign Currency Transaction Gain (Loss), Realized Basic earnings (loss) per share: Earnings Per Share, Basic [Abstract] Net income (loss) available for common stockholders Less: Dividends and undistributed earnings allocated to participating securities Participating Securities, Distributed and Undistributed Earnings (Loss), Basic Net income (loss) available for common stockholders, net of dividends and undistributed earnings allocated to participating securities Net Income (Loss) Available to Common Stockholders, Basic Weighted average shares of common stock outstanding: Weighted Average Number of Shares Outstanding, Basic [Abstract] Outstanding (in shares) Basic earnings (loss) per share (in dollars per share) Lessee, Lease, Description [Table] Lessee, Lease, Description [Table] Lessee, Lease, Description [Line Items] Lessee, Lease, Description [Line Items] Operating lease, term of contract Lessee, Operating Lease, Term of Contract Sublease, term of contract Lessor, Operating Lease, Term of Contract Termination of office leases Gain (Loss) on Termination of Lease Impairment of ROU Asset Operating Lease, Impairment Loss Write-offs of leasehold improvements and fixed assets Write-Off Of Leasehold And Fixed Assets Write-Off Of Leasehold And Fixed Assets Dilapidation charges Dilapidation Charges Dilapidation Charges Total Long-term borrowings Long-term Debt [Member] Outstanding Principal Discount Debt Instrument, Unamortized Discount Employee compensation expense Earnings per Share Earnings Per Share [Text Block] Schedule of Variable Interest Entities [Table] Schedule of Variable Interest Entities [Table] JV building microwave communication networks in US and Asia Joint Venture Building Microwave Communication Networks In U S And Asia [Member] Represents information related to a joint venture that the entity has invested in which is building microwave communication networks in the U.S. And Asia. JV building microwave communication networks in US and Europe Joint Venture Building Microwave Communication Networks In U S And Europe [Member] Represents information related to a joint venture that the entity has invested in which is building microwave communication networks in the U.S. And Europe. JV offering derivatives trading technology and execution services Joint Venture Offering Derivatives Trading Technology And Execution Services [Member] Joint Venture Offering Derivatives Trading Technology And Execution Services [Member] Variable Interest Entity [Line Items] Variable Interest Entity [Line Items] Number of other investors in JV Number Of Other Investors In Joint Venture The number of other investors in a joint venture. Ownership of voting shares of JV held be each investor (as a percent) Percentage Ownership Of Voting Shares Of Joint Venture Held By Each Investor The percentage ownership of voting shares of joint venture held be each investor. Ownership of equity of JV held be each investor (as a percent) Percentage Ownership Of Equity Of Joint Venture Held By Each Investor The percentage ownership of equity of joint venture held be each investor. Ownership of voting shares (as a percent) Equity Method Investment Voting Shares Percentage Percentage of voting equity interests acquired in a joint venture. Number of joint ventures considered as VIEs Variable Interest Entity, Number Of Entities Variable Interest Entity, Number Of Entities Equity investment, Carrying Amount, Asset Variable Interest Entity, Nonconsolidated, Carrying Amount, Assets Equity investment, Carrying Amount, Liability Variable Interest Entity, Nonconsolidated, Carrying Amount, Liabilities Equity investment, Maximum Exposure to Loss Equity Method Investment Maximum Exposure To Loss This item represents the maximum exposure to loss for an equity method investment. Equity investment, VIEs' assets Equity Method Investment, Summarized Financial Information, Assets Schedule of regulatory capital and regulatory capital requirements Regulatory Capital and Regulatory Capital Requirement [Table Text Block] Tabular disclosure of regulatory capital and regulatory capital requirements. Property, Plant and Equipment [Table] Property, Plant and Equipment [Table] Property, Plant and Equipment, Type [Axis] Property, Plant and Equipment, Type [Axis] Property, Plant and Equipment, Type [Domain] Property, Plant and Equipment, Type [Domain] Capitalized software Software Development [Member] Property, Plant and Equipment [Line Items] Property, Plant and Equipment [Line Items] Estimated useful lives Property, Plant and Equipment, Useful Life Subsequent Events [Abstract] Subsequent Events Subsequent Events [Text Block] Income Tax Disclosure [Abstract] Effective tax rate Effective Income Tax Rate Reconciliation, Percent Current income taxes receivable Income Taxes Receivable, Current Current taxes payable Taxes Payable, Current Operating loss carryforwards Operating Loss Carryforwards Deferred tax asset, non-U.S. operating loss carryforward Deferred Tax Assets, Operating Loss Carryforwards, Foreign Valuation allowance on deferred taxes Deferred Tax Assets, Valuation Allowance Unrecognized tax benefits that would impact effective tax rate Unrecognized Tax Benefits that Would Impact Effective Tax Rate Subsequent Event [Table] Subsequent Event [Table] Subsequent Event Type [Axis] Subsequent Event Type [Axis] Subsequent Event Type [Domain] Subsequent Event Type [Domain] Subsequent Event Subsequent Event [Member] Subsequent Event [Line Items] Subsequent Event [Line Items] Dividends declared (in dollars per share) Common Stock, Dividends, Per Share, Declared Virtu Americas LLC Virtu Financial BD LLC Virtu Financial Bd Llc [Member] Represents information pertaining to Virtu Financial BD LLC. Virtu ITG LLC Virtu Alternet Securities LLC Virtu Alternet Securities LLC [Member] Virtu Alternet Securities LLC [Member] Virtu ITG Canada Corp Virtu ITG Canada Corp [Member] Virtu ITG Canada Corp [Member] TriAct Canada Marketplace LP TriAct Canada Marketplace LP [Member] TriAct Canada Marketplace LP [Member] Virtu Financial Canada ULC Virtu Financial Canada ULC [Member] Virtu Financial Canada ULC [Member] Virtu ITG Europe Limited Virtu ITG Europe Limited [Member] Virtu ITG Europe Limited [Member] Virtu Financial Ireland Limited Virtu Financial Ireland Ltd [Member] Virtu Financial Ireland Ltd [Member] Virtu ITG UK Limited Virtu ITG UK Limited [Member] Virtu ITG UK Limited [Member] KCG Europe Limited KCG Europe Limited [Member] KCG Europe Limited [Member] Virtu ITG Australia Limited Virtu ITG Australia Limited [Member] Virtu ITG Australia Limited [Member] Virtu ITG Hong Kong Limited Virtu ITG Hong Kong Limited [Member] Virtu ITG Hong Kong Limited [Member] Virtu ITG Singapore Pte Limited Virtu ITG Singapore Pte Limited [Member] Virtu ITG Singapore Pte Limited [Member] Canada Ireland United Kingdom Asia Pacific Asia Pacific [Member] Regulatory Capital Broker-Dealer, Net Capital Regulatory Capital Requirement Broker-Dealer, Minimum Net Capital Required, Aggregate Indebtedness Standard Excess Regulatory Capital Broker-Dealer, Excess Net Capital, 1500 Percent, Aggregate Indebtedness Standard Scenario [Axis] Scenario [Axis] Scenario [Domain] Scenario [Domain] Pro Forma Pro Forma [Member] Revenue Summary of the fair value of collateralized transactions Schedule of Customer Securities for which Entity has Right to Sell or Repledge [Table Text Block] Schedule of financial instruments owned and pledged, where counterparty has right to repledge Schedule of Financial Instruments Owned and Pledged as Collateral [Table Text Block] Furniture and equipment Furniture and Fixtures [Member] KCG Kcg Holdings [Member] The information pertaining to KCG Holdings Investment Type [Axis] Investment Type [Axis] Investments [Domain] Investments [Domain] Aranda Aranda Investment Agreement [Member] Represents the information pertaining to Aranda investment agreement. North Island Stockholder North Island Holdings I, LP [Member] North Island Holdings I, LP [Member] Aggregate purchase price Stock Issued During Period, Value, New Issues Issuance of common stock in connection with employee exchanges (in shares) Common stock exchange ratio Common Stock, Exchange Ratio Ratio applied in exchange of shares. Offsetting Assets [Table] Offsetting Assets [Table] Offsetting Assets [Line Items] Offsetting Assets [Line Items] Securities borrowed Offsetting Securities Borrowed [Abstract] Gross Amounts of Recognized Assets Securities Borrowed, Gross Net Amounts of Assets Presented in the Condensed Consolidated Statement of Financial Condition Gross Amounts Not Offset in the Condensed Consolidated Statement of Financial Condition Securities Borrowed Gross Amounts Not Offset [Abstract] No definition available. Financial Instruments Securities Borrowed Not Offset Financial Instruments Represents the amount of securities borrowed that could be offset by securities loaned subject to master netting arrangements, but management elects not to offset. Cash Collateral Received Securities Borrowed, Collateral, Obligation to Return Cash Net Amount Securities Borrowed Net Represents the net amount of securities borrowed after the effects of master netting arrangements and collateral. Securities purchased under agreements to resell Securities Purchased under Agreements to Resell [Abstract] Gross Amounts of Recognized Assets Securities Purchased under Agreements to Resell, Gross Net Amounts of Assets Presented in the Condensed Consolidated Statement of Financial Condition Gross Amounts Not Offset in the Condensed Consolidated Statement of Financial Condition Securities Purchased under Agreements to Resell, Amount Offset Against Collateral [Abstract] Financial Instruments Securities Purchased under Agreements to Resell, Collateral, Obligation to Return Securities Cash Collateral Received Securities Purchased under Agreements to Resell, Collateral, Obligation to Return Cash Net Amount Securities Purchased under Agreements to Resell, Offset Against Collateral, Net of Not Subject to Master Netting Arrangement, Policy Election Trading assets, at fair value: Offsetting Trading Assets at Fair Value [Abstract] Gross Amounts of Recognized Assets Gross Amounts Offset in the Condensed Consolidated Statement of Financial Condition Derivative Asset, Fair Value, Gross Liability Net Amounts of Assets Presented in the Condensed Consolidated Statement of Financial Condition Derivative Asset Gross Amounts Not Offset in the Condensed Consolidated Statement of Financial Condition Derivative Fair Value of Derivative Asset Gross Amounts Not Offset [Abstract] No definition available. Financial Instruments Derivative Asset Not Offset Financial Instruments Represents the amount of derivative assets that could be offset by derivative liabilities subject master netting arrangements, but management elects not to offset. Cash Collateral Received Derivative, Collateral, Obligation to Return Cash Net Amount Derivative Fair Value of Derivative Asset after Application of Master Netting Agreements and Cash and Securities Collateral Represents the amount of fair value of derivative assets, net of master netting arrangements and collateral. Total Offsetting Derivative Asset, Securities Purchased under Agreements to Resell, Securities Borrowed [Abstract] Gross Amounts of Recognized Assets Derivative Asset, Securities Purchased under Agreements to Resell, Securities Borrowed, Gross Gross Amounts Offset in the Condensed Consolidated Statement of Financial Condition Derivative Asset, Securities Purchased under Agreements to Resell, Securities Borrowed, Liability Net Amounts of Assets Presented in the Condensed Consolidated Statement of Financial Condition Derivative Asset, Securities Purchased under Agreements to Resell, Securities Borrowed Gross Amounts Not Offset in the Condensed Consolidated Statement of Financial Condition Derivative Asset Securities Purchased under Agreements to Resell Securities Borrowed Gross Amounts Not Offset [Abstract] No definition available. Financial Instruments Derivative Asset Securities Purchased under Agreements to Resell Securities Borrowed Not Offset Financial Instruments Represents the amount of derivative assets, securities purchased under agreements to resell and securities borrowed that could be offset by liabilities subject to master netting arrangements, but management elects not to offset. Cash Collateral Received Derivative Asset, Securities Purchased under Agreements to Resell, Securities Borrowed, Collateral, Obligation to Return Cash Net Amount Derivative Asset Securities Purchased under Agreements to Resell Securities Borrowed Net Represents the fair value of derivative assets, securities purchased under agreements to resell and securities borrowed, net of master netting arrangements and collateral. Cash and cash equivalents Cash restricted or segregated under regulations and other Restricted Cash and Cash Equivalents Total cash, cash equivalents and restricted cash shown in the statement of cash flows Summary of assets and liabilities of businesses held for sale Disposal Groups, Including Discontinued Operations [Table Text Block] Held for Sale Discontinued Operations, Held-for-sale [Member] Total sale proceeds received Business assets and liabilities held for sale: Disposal Group, Including Discontinued Operation, Balance Sheet Disclosures [Abstract] Receivables from broker dealers and clearing organizations Disposal Group, Including Discontinued Operation, Accounts, Notes and Loans Receivable, Net Intangibles and other assets Disposal Group, Including Discontinued Operation, Intangible Assets Liabilities Disposal Group, Including Discontinued Operation, Liabilities Total carrying value of BondPoint Disposal Group, Including Discontinued Operation, Net Assets (Liabilities) Disposal Group, Including Discontinued Operation, Net Assets (Liabilities) Goodwill adjustment allocated to BondPoint Goodwill, Written off Related to Sale of Business Unit Gain on sale of BondPoint Gain on sale of BondPoint, net of transaction costs Schedule of reconciliation of net income before noncontrolling interest to net income available for common stockholders Schedule Of Reconciliation Of Net Income Before Noncontrolling Interest To Net Income Available For Common Stockholders Table Text Block Tabular disclosure of reconciliation of net income before noncontrolling interest to net income available for common stockholders. Schedule of basic earnings per share Schedule of Earnings Per Share, Basic, by Common Class, Including Two Class Method [Table Text Block] Schedule of diluted earnings per share Schedule of Earnings Per Share, Diluted, by Common Class, Including Two Class Method [Table Text Block] ITG Acquisition Business Combination Disclosure [Text Block] Schedule of Short-term Debt [Table] Schedule of Short-term Debt [Table] Short-term Debt [Line Items] Short-term Debt [Line Items] Weighted Average Interest Rate Broker-dealer credit facility on an uncommitted basis Borrowing Base A Loan Borrowing Base A Loan [Member] Borrowing Base A Loan [Member] Borrowing Base B Loan Borrowing Base B Loan [Member] Borrowing Base B Loan [Member] Number of secured credit facilities Number Of Secured Credit Facilities Represents the number of secured credit facilities. Aggregate borrowing Number of borrowing bases Number Of Borrowing Bases The number of borrowing bases for a credit facility. Interest rate margin (as a percent) Capital Structure Stockholders' Equity Note Disclosure [Text Block] Income Taxes Income Tax Disclosure [Text Block] Operating lease cost: Fixed Operating Lease, Cost Variable Variable Lease, Cost Total Operating lease cost Lease, Cost Finance lease cost: Amortization of right-of-use assets Finance Lease, Right-of-Use Asset, Amortization Interest on lease liabilities Finance Lease, Interest Expense Total Finance lease cost Finance Lease, Cost Finance Lease, Cost Sublease income Sublease Income Due from prime brokers Due from Correspondent Brokers Deposits with clearing organizations Receivables from Clearing Organizations Net equity with futures commission merchants Net Equity with Futures Commission Merchant Assets Represents the amount of net equity with futures commission merchants, asset. Unsettled trades with clearing organization Unsettled Trade Assets Represents the amount receivable for unsettled trades. Securities failed to deliver Securities Failed-to-Deliver Commissions and fees Commissions and Floor Brokerage Receivables Total receivables from broker-dealers and clearing organizations Due to prime brokers Due to Correspondent Brokers Net equity with futures commission merchants Net Equity with Futures Commission Merchant Liabilities Represents the amount of net equity with futures commission merchants, liability. Unsettled trades with clearing organization Unsettled Trade Liabilities Represents the amount payable for unsettled trade liabilities. Securities failed to receive Securities Failed-to-Receive Commissions and fees Commissions Payable to Broker-Dealers and Clearing Organizations Total payables to broker-dealers and clearing organizations Outstanding principal balance Short Term Credit Facilities Represents the carrying value of the outstanding principal balance on all of the entity's short-term credit facilities. Weighted average remaining lease term Operating Lease, Weighted Average Remaining Lease Term Weighted average discount rate Operating Lease, Weighted Average Discount Rate, Percent Weighted average remaining lease term Finance Lease, Weighted Average Remaining Lease Term Weighted average discount rate Finance Lease, Weighted Average Discount Rate, Percent Corporate Bonds Bonds [Member] Exchange stock Exchange Stock [Member] Represents the information pertaining to exchange stock. Financial instruments owned, at fair value Financial instruments owned, at fair value, counterparty and cash collateral netting Financial Instruments Owned And Not Pledged At Fair Value Counter Party And Cash Collateral Netting The fair value as of the balance sheet date of financial instruments and other positions owned by the entity, counterparty and cash collateral netting. Financial instruments owned and pledged Other assets Financial instruments sold, not yet purchased, at fair value, counterparty and cash collateral netting Financial Instruments Sold Not Yet Purchased At Fair Value Counter Party And Cash Collateral Netting Fair value of obligations incurred from short sales, counterparty and cash collateral netting.