Document and Entity Information Statement [Table] Statement [Line Items] Statement Entity Registrant Name Entity Central Index Key Document Type Document Period End Date Amendment Flag Current Fiscal Year End Date Entity Well-known Seasoned Issuer Entity Voluntary Filers Entity Current Reporting Status Entity Filer Category Entity Public Float Entity Common Stock, Shares Outstanding Document Fiscal Year Focus Document Fiscal Period Focus Consolidated Statements of Financial Condition Assets [Abstract] Assets Cash and Cash Equivalents, at Carrying Value Cash and cash equivalents beginning of period Cash and cash equivalents Securities Borrowed Securities borrowed Net Amounts of Assets Presented in the Consolidated Statement of Financial Condition Receivables from Brokers-Dealers and Clearing Organizations Receivables from broker dealers and clearing organizations Total receivables from broker-dealers and clearing organizations Financial Instruments, Owned, at Fair Value [Abstract] Trading assets, at fair value: Financial Instruments, Owned and Not Pledged, at Fair Value Financial instruments owned Financial instruments owned, at fair value Financial Instruments, Owned and Pledged as Collateral, at Fair Value Financial instruments owned, pledged as collateral Financial instruments owned and pledged, where counterparty has right to repledge Financial instruments owned and pledged Property, Plant and Equipment, Net Property, equipment and capitalized software (net of accumulated depreciation of $375,656 and $113,184 as of December 31, 2017 and 2016, respectively) Total property, equipment and capitalized software, net Goodwill Balance at the end of the period Balance at the beginning of the period Goodwill Finite-Lived Intangible Assets, Net Intangibles (net of accumulated amortization of $123,408 and $110,908 as of December 31, 2017 and December 31, 2016, respectively) Net Carrying Amount Intangible assets Deferred Tax Assets, Net, Noncurrent Deferred tax asset Disposal Group, Including Discontinued Operation, Assets Assets of business held for sale Total assets Other Assets Other assets Other assets ($98,364 and $36,480, at fair value, as of December 31, 2017 and 2016, respectively) Assets Total Assets Liabilities and Equity [Abstract] Liabilities and equity Liabilities [Abstract] Liabilities Short-term Debt Short term borrowings Securities Loaned Securities loaned Net Amounts of Liabilities Presented in the Consolidated Statement of Financial Condition Securities Sold under Agreements to Repurchase Securities sold under agreements to repurchase Net Amounts of Liabilities Presented in the Consolidated Statement of Financial Condition Payables to Broker-Dealers and Clearing Organizations Payables to broker dealers and clearing organizations Total payables to broker-dealers and clearing organizations Financial Instruments Sold, Not yet Purchased, at Fair Value [Abstract] Trading liabilities, at fair value: Financial Instruments Sold, Not yet Purchased, at Fair Value Financial instruments sold, not yet purchased Financial instruments sold, not yet purchased, at fair value Represents the carrying amount on the reporting date of the obligations relating to the tax receivable agreement. Tax Receivable Agreement, Obligations Tax receivable agreement obligations 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. Accounts Payable and Accrued Expenses and Other Liabilities Accounts payable and accrued expenses and other liabilities Long-term Debt Long-term borrowings Borrowing Outstanding, net Long term borrowings Liabilities Total Liabilities Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest [Abstract] Stockholders' Equity Common Stock, Value, Issued Common stock Common stock value Treasury Stock, Value Treasury stock, at cost, 616,923 and 453,066 shares at December 31, 2017 and 2016, respectively Treasury stock Treasury stock Additional Paid in Capital Additional paid-in capital Retained Earnings (Accumulated Deficit) Accumulated deficit (Accumulated deficit) Retained earnings Accumulated Other Comprehensive Income (Loss), Net of Tax Accumulated other comprehensive income (loss) Accumulated other comprehensive (loss) income Stockholders' Equity Attributable to Parent Balance Balance Total stockholders' equity Stockholders' Equity Attributable to Noncontrolling Interest Noncontrolling interest Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest Balance Balance Total equity Liabilities and Equity Total liabilities and equity Accumulated Depreciation, Depletion and Amortization, Property, Plant, and Equipment Less: Accumulated depreciation and amortization Accumulated depreciation (in dollars) Finite-Lived Intangible Assets, Accumulated Amortization Accumulated Amortization Intangibles accumulated amortization (in dollars) Other Assets, Fair Value Disclosure Fair value of other assets (in dollars) Other assets Common Stock, Par or Stated Value Per Share Common stock, par value Common stock, par value (in dollars per share) Common Stock, Shares Authorized Common stock, authorized Common stock shares authorized Common Stock, Shares, Issued Common stock shares issued Common Stock, Shares, Outstanding Balance (in shares) Balance (in shares) Common stock, outstanding Common stock shares outstanding Treasury Stock, Shares Treasury stock (in shares) Treasury stock (in shares) Treasury stock shares Consolidated Statements of Comprehensive Income Revenues [Abstract] Revenues: Trading Gain (Loss) Trading income, net Interest and Dividend Income, Operating Interest and dividends income Technology Services Revenue Commissions, net and technology services Other Revenue, Net Other, net Revenues Revenues Total revenue Operating Expenses [Abstract] Operating Expenses: Floor Brokerage, Exchange and Clearance Fees Brokerage, exchange and clearance fees, net Communications and Information Technology Communication and data processing Labor and Related Expense Employee compensation and payroll taxes Order Flow Fees Payments for order flow Represents the amount of interest and dividends expense incurred during the normal course of business. Interest and Dividend Expense Operating Interest and dividends expense General and Administrative Expense Operations and administrative 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. Depreciation And Amortization Excluding Intangible Assets Depreciation and amortization Amortization of Intangible Assets Amortization expense relating to finite-lived intangible assets Amortization of purchased intangibles and acquired capitalized software Debt issue costs related to debt refinancing. Debt Issue Cost Related To Debt Refinancing Debt issue costs related to debt refinancing Legal Fees Transaction advisory fees and expenses Loss Contingency, Loss in Period Reserve for legal matter The aggregate amount of noncash, equity-based employee remuneration vested upon initial public offering. Share-based Compensation Expense, Vested Upon Initial Public Offering Charges related to share-based compensation at IPO Interest Expense, Debt Financing interest expense on long-term borrowings Interest expense Operating Expenses Total operating expenses Income (Loss) from Continuing Operations before Equity Method Investments, Income Taxes, Extraordinary Items, Noncontrolling Interest Income before income taxes and non-controlling interest Income (loss) before income taxes and noncontrolling interest Pre-tax earnings Income Tax Expense (Benefit) Provision for (benefit from) income taxes Provision (benefit) for income taxes Net Income (Loss), Including Portion Attributable to Noncontrolling Interest Net Income Net income (loss) Net income (loss) Net Income (Loss) Attributable to Noncontrolling Interest Noncontrolling interest Net Income (Loss) Attributable to Parent Net income available for common stockholders Net income (loss) attributable to common stockholders Net income (loss) available for common stockholders Net income attributable to common stockholders Earnings per Share Earnings (loss) per share Earnings Per Share, Basic Basic (in dollars per share) Basic Earnings per share Earnings Per Share, Diluted Diluted (in dollars per share) Diluted Earnings per share Weighted Average Number of Shares Outstanding, Diluted [Abstract] Weighted average common shares outstanding Weighted average shares of common stock outstanding Weighted Average Number of Shares Outstanding, Basic Outstanding Basic (in shares) Issued and outstanding Weighted Average Number of Shares Outstanding, Diluted Diluted (in shares) Weighted average number of shares of common stock outstanding Comprehensive Income (Loss), Net of Tax, Attributable to Parent [Abstract] Comprehensive income Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent [Abstract] Other comprehensive income (loss) Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Adjustment, Net of Tax Foreign exchange translation adjustment Foreign currency translation adjustment, net of taxes Comprehensive Income (Loss), Net of Tax, Including Portion Attributable to Noncontrolling Interest Comprehensive income (loss) Comprehensive Income (Loss), Net of Tax, Attributable to Noncontrolling Interest Less: Comprehensive income (loss) attributable to non-controlling interests Comprehensive Income (Loss), Net of Tax, Attributable to Parent Comprehensive income (loss) attributable to common stockholders Consolidated Statements of Changes in Equity Increase (Decrease) in Stockholders' Equity [Roll Forward] Increase (decrease) in stockholder's/members' equity Members Equity Balance Balance Common Unit, Outstanding Balance (in shares) Balance (in shares) Stock Issued During Period, Value, Share-based Compensation, Net of Forfeitures Share based compensation Stock Issued During Period, Shares, Share-based Compensation, Net of Forfeitures Share based compensation (in shares) Equity impact of the value of members interests that has been repurchased during the period and has not been retired and is not held in treasury. Common Units Repurchased During Period Value Repurchase of interests Number of members interests that have been repurchased during the period and have not been retired and are not held in treasury. Common Units Repurchased During Period Shares Repurchase of interests (in shares) Dividends, Common Stock Dividends Represents the information of value related to reorganization of equity structure. Reorganization Of Equity Structure Value Reorganization of equity structure Represents the information related to number of shares after reorganization of equity structure. Reorganization Of Equity Structure Shares Reorganization of equity structure (in shares) Adjustment to number of common units of ownership outstanding of a limited liability company (LLC). Common Unit Adjustment Reorganization of equity structure (in shares) Stock Issued During Period, Value, New Issues Issuance of Common Stock, net of offering costs Aggregate purchase price Stock Issued During Period, Shares, New Issues Number of shares of stock issued Issuance of Common Stock, net of offering costs (in shares) Equity impact of the value of new stock issued during the period in a secondary public offering. Stock Issued During Period Secondary Offering Value New Issues Issuance of Common Stock in connection with secondary offering, net of offering costs Number of new stock issued during the period in a secondary offering. Stock Issued During Period Secondary Offering Shares New Issues Issuance of common stock (in shares) Equity impact of the value of members interests that has been repurchased during the period as part of a secondary offering and has not been retired and is not held in treasury. Common Units Repurchased During Period In Secondary Offering Value Repurchase of units and corresponding number of common stock in connection with secondary offering 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. Common Units Repurchased During Period In Secondary Offering Shares Repurchase of units and corresponding number of common stock in connection with secondary offering (in shares) This element represents the amount of recognized equity-based compensation vested upon Initial Public Offering during the period, that is, the amount recognized as expense in the income statement (or as asset if compensation is capitalized). Adjustments To Additional Paid In Capital Share based Compensation Vested Upon Initial Public Offering Share based compensation vested upon IPO Represents the adjustments to additional paid in capital from change in proportionate ownership. Adjustments to Additional Paid in Capital, Change In Proportionate Ownership Adjustments for changes in proportionate ownership in Virtu Financial Amount of increase (decrease) in additional paid in capital (APIC) resulting from issuance of tax receivable agreements. Adjustments to Additional Paid in Capital, Issuance of Tax Receivable Agreements Issuance of tax receivable agreements in connection with secondary offering Stock Repurchased During Period, Value Repurchase of common stock Stock Repurchased During Period, Shares Repurchase of common stock (in shares) Treasury Stock, Value, Acquired, Cost Method Treasury stock purchases Treasury Stock, Shares, Acquired Treasury stock purchases (in shares) Total Number of Shares Purchased as Part of Publicly Announced Plans or Programs(1) Noncontrolling Interest, Decrease from Distributions to Noncontrolling Interest Holders Distribution from Virtu Financial to non-controlling interest Amount of increase in additional paid in capital (APIC) resulting from issuance of tax receivable agreements in connection with secondary offering. Adjustments to Additional Paid in Capital Issuance of Tax Receivable Agreements In Connection With Secondary Offering Issuance of tax receivable agreements in connection with secondary offering Consolidated Statements of Cash Flows Net Cash Provided by (Used in) Operating Activities, Continuing Operations [Abstract] Cash flows from operating activities Adjustments to Reconcile Net Income (Loss) to Cash Provided by (Used in) Operating Activities [Abstract] Adjustments to reconcile net income to net cash provided by operating activities: Debt Related Commitment Fees and Debt Issuance Costs Debt issue cost related to debt refinancing Amortization of Financing Costs and Discounts Amortization of debt issuance costs and deferred financing fees Represents the amount of expense related to the lease abandonment or termination. Lease Abandonment Termination of office leases Share-based Compensation. Share based compensation Asset Impairment Charges Equipment writeoff Reduction in tax receivable agreement obligations. Decrease in Tax Receivable Agreement Obligations Tax receivable agreement obligation reduction Deferred Income Tax Expense (Benefit) Deferred taxes Other Noncash Income (Expense) Other Increase (Decrease) in Operating Capital [Abstract] Changes in operating assets and liabilities: Increase (Decrease) in Securities Borrowed Securities borrowed Increase (Decrease) in Receivables under Repurchase Agreements Securities purchased under agreements to resell Increase (Decrease) in Receivables from Brokers-Dealers and Clearing Organizations Receivables from broker dealers and clearing organizations Represents the amount of increase (decrease) in fair value of trading assets. Increase (Decrease) in Trading Assets at Fair Value Trading assets, at fair value Increase (Decrease) in Other Operating Assets Other Assets Increase (Decrease) in Securities Loaned Transactions Securities loaned Increase (Decrease) in Payables under Repurchase Agreements Securities sold under agreements to repurchase Increase (Decrease) in Payables to Broker-Dealers and Clearing Organizations Payables to broker dealers and clearing organizations Represents the amount of increase (decrease) in fair value of trading liabilities. Increase (Decrease) in Trading Liabilities at Fair Value Trading liabilities, at fair value Represents the amount of increase (decrease) in accounts payable and accrued expenses and other liabilities. Increase (Decrease) in Accounts Payable and Accrued Expenses and Other Liabilities Accounts payable and accrued expenses and other liabilities Net Cash Provided by (Used in) Operating Activities, Continuing Operations Net cash provided by operating activities Net Cash Provided by (Used in) Investing Activities, Continuing Operations [Abstract] Cash flows from investing activities Payments to Develop Software Development of capitalized software Payments to Acquire Property, Plant, and Equipment Acquisition of property and equipment Payments to Acquire Equity Method Investments Investment in SBI Japannext Payment for minority interest Payments to Acquire Business Two, Net of Cash Acquired Acquisition of KCG Holdings, net of cash acquired, described in Note 3 Payments to Acquire Businesses, Net of Cash Acquired Acquisition of Teza Technologies Purchase price Proceeds from Divestiture of Businesses Proceeds from sale of DMM business Proceeds from sale of business Net Cash Provided by (Used in) Investing Activities, Continuing Operations Cash flows used in investing activities Net cash used in investing activities Net Cash Provided by (Used in) Financing Activities, Continuing Operations Cash flows from financing activities Represents the payments made to members through distributions. Payments to Members Distribution to members Payments to Noncontrolling Interests Distribution from Virtu Financial to non-controlling interest Payments of Dividends Dividends Payments for Repurchase of Common Stock Purchase of treasury stock Repayments of Short-term Debt Short-term borrowings, net The cash outflow to reacquire common units during the period. Payments for Repurchase Of Common Units Repurchase of Class A-2 interests Payments on repurchase of non-voting common interest Proceeds from Issuance of Long-term Debt Proceeds from long-term borrowings Repayments of Long-term Debt Repayment of senior secured credit facility Repayments of long-term debt Repayments of Notes Payable Repayment of KCG Notes Cash outflow for payment of tax receivable agreement obligations. Payment Of Tax Receivable Agreement Obligations Tax receivable agreement obligations Payments of Debt Issuance Costs Debt issuance costs Proceeds from Issuance of Common Stock Proceeds from issuance Issuance of common stock, net of offering costs The cash outflow to reacquire member units and common stock during the period. Payments for Repurchase of Member Units And Common Stock Repurchase of Virtu Financial Units and corresponding number of Class A and C Common Stock The cash inflow from the additional capital contribution to the entity in a secondary offering. Proceeds From Issuance Of Common Stock Secondary Offering Issuance of common stock, net of offering costs The cash outflow to reacquire member units and common stock in a secondary offering during the period. Payments For Repurchase Of Member Units And Common Stock Secondary Offering Repurchase of Virtu Financial Units and corresponding number of Class A and C common stock in connection with secondary offering Repurchase of Virtu Financial Units and corresponding number of Class A and C common stock in connection with IPO Net Cash Provided by (Used in) Financing Activities, Continuing Operations [Abstract] Net cash provided by (used in) financing activities Effect of Exchange Rate on Cash and Cash Equivalents Effect of exchange rate changes on cash and cash equivalents Cash and Cash Equivalents, Period Increase (Decrease) Net decrease in Cash and cash equivalents Supplemental Cash Flow Information [Abstract] Supplementary disclosure of cash flow information Interest Paid, Net Cash paid for interest Income Taxes Paid, Net Cash paid for taxes Taxes paid Cash Flow Noncash Investing Activities Disclosure [Abstract] Non-cash investing activities Represents the amount of non-cash compensation to developers subject to capitalization of software. Non Cash Compensation to Developers Subject to Capitalization of Software Share based compensation of developers relating to software capitalized Cash Flow Noncash Financing Activities Disclosure [Abstract] Non-cash financing activities Represents the non cash portion attributable to the tax receivable agreement. Non Cash Financing Activity, Tax Receivable Agreement Tax receivable agreement described in Note 4 Tax receivable agreement described in Note 6 Debt Instrument, Unamortized Discount Discount Discount on issuance of senior secured credit facility Discount Organization and Basis of Presentation Organization, Consolidation and Presentation of Financial Statements Disclosure [Text Block] Organization and Basis of Presentation Summary of Significant Accounting Policies Significant Accounting Policies [Text Block] Summary of Significant Accounting Policies Acquisition of KCG Holdings, Inc. Business Combination Disclosure [Text Block] Acquisition of KCG Holdings, Inc. Business Held for Sale Disposal Groups, Including Discontinued Operations, Disclosure [Text Block] Business Held for Sale Earnings Per Share [Text Block] Earnings per share n/a Tax Receivable Agreements