2017 Form 10-K Financial Statement
#000156459018002713 Filed on February 21, 2018
Income Statement
| Concept | 2017 | 2016 | 2015 Q4 |
|---|---|---|---|
| Revenue | $393.4M | $369.9M | $76.60M |
| YoY Change | 6.35% | 22.05% | 9.12% |
| Cost Of Revenue | $20.00M | $34.50M | $7.300M |
| YoY Change | -42.03% | 18.97% | -6.41% |
| Gross Profit | $373.4M | $335.5M | $69.40M |
| YoY Change | 11.3% | 22.4% | 11.4% |
| Gross Profit Margin | 94.91% | 90.7% | 90.6% |
| Selling, General & Admin | $148.7M | $126.0M | $27.70M |
| YoY Change | 18.02% | 16.99% | 13.52% |
| % of Gross Profit | 39.82% | 37.56% | 39.91% |
| Research & Development | $17.28M | ||
| YoY Change | 8.54% | ||
| % of Gross Profit | 5.15% | ||
| Depreciation & Amortization | $19.30M | $17.80M | $4.600M |
| YoY Change | 8.43% | -3.78% | 4.55% |
| % of Gross Profit | 5.17% | 5.31% | 6.63% |
| Operating Expenses | $193.8M | $178.3M | $32.40M |
| YoY Change | 8.69% | 14.9% | 12.11% |
| Operating Profit | $199.6M | $190.0M | $37.00M |
| YoY Change | 5.07% | 59.78% | 10.78% |
| Interest Expense | $3.600M | ||
| YoY Change | |||
| % of Operating Profit | 1.8% | ||
| Other Income/Expense, Net | $2.153M | $1.617M | |
| YoY Change | 33.15% | ||
| Pretax Income | $201.8M | $191.6M | $37.00M |
| YoY Change | 5.31% | 29.55% | 10.45% |
| Income Tax | $53.68M | $65.43M | $12.50M |
| % Of Pretax Income | 26.6% | 34.15% | 33.78% |
| Net Earnings | $148.1M | $126.2M | $24.50M |
| YoY Change | 17.37% | 31.38% | 13.43% |
| Net Earnings / Revenue | 37.64% | 34.11% | 31.98% |
| Basic Earnings Per Share | $4.02 | $3.42 | |
| Diluted Earnings Per Share | $3.89 | $3.34 | $651.6K |
| COMMON SHARES | |||
| Basic Shares Outstanding | 36.86M | 36.84M | |
| Diluted Shares Outstanding | 38.04M | 37.74M |
Balance Sheet
| Concept | 2017 | 2016 | 2015 Q4 |
|---|---|---|---|
| SHORT-TERM ASSETS | |||
| Cash & Short-Term Investments | $167.0M | $168.2M | $284.4M |
| YoY Change | -0.71% | -15.77% | 68.4% |
| Cash & Equivalents | $167.0M | $168.2M | $199.7M |
| Short-Term Investments | $84.71M | ||
| Other Short-Term Assets | $18.70M | $11.60M | $9.900M |
| YoY Change | 61.21% | 17.17% | 47.76% |
| Inventory | |||
| Prepaid Expenses | |||
| Receivables | $52.60M | $50.70M | $40.50M |
| Other Receivables | $0.00 | $0.00 | $0.00 |
| Total Short-Term Assets | $238.3M | $230.5M | $250.1M |
| YoY Change | 3.38% | -7.84% | 19.44% |
| LONG-TERM ASSETS | |||
| Property, Plant & Equipment | $38.50M | $31.10M | $30.90M |
| YoY Change | 23.79% | 0.65% | -4.0% |
| Goodwill | |||
| YoY Change | |||
| Intangibles | |||
| YoY Change | |||
| Long-Term Investments | $239.5M | $194.4M | $84.70M |
| YoY Change | 23.2% | 129.52% | 30.51% |
| Other Assets | $1.700M | $8.600M | $9.200M |
| YoY Change | -80.23% | -6.52% | 31.43% |
| Total Long-Term Assets | $342.9M | $297.5M | $188.9M |
| YoY Change | 15.26% | 57.49% | 10.83% |
| TOTAL ASSETS | |||
| Total Short-Term Assets | $238.3M | $230.5M | $250.1M |
| Total Long-Term Assets | $342.9M | $297.5M | $188.9M |
| Total Assets | $581.2M | $528.0M | $439.0M |
| YoY Change | 10.08% | 20.27% | 15.57% |
| SHORT-TERM LIABILITIES | |||
| YoY Change | |||
| Accounts Payable | $14.20M | $15.10M | $12.30M |
| YoY Change | -5.96% | 22.76% | 2.5% |
| Accrued Expenses | $36.50M | $34.80M | $29.30M |
| YoY Change | 4.89% | 18.77% | 15.81% |
| Deferred Revenue | |||
| YoY Change | |||
| Short-Term Debt | $0.00 | $0.00 | $0.00 |
| YoY Change | |||
| Long-Term Debt Due | |||
| YoY Change | |||
| Total Short-Term Liabilities | $63.80M | $57.50M | $46.10M |
| YoY Change | 10.96% | 24.73% | 6.71% |
| LONG-TERM LIABILITIES | |||
| Long-Term Debt | $0.00 | $0.00 | $0.00 |
| YoY Change | |||
| Other Long-Term Liabilities | $2.700M | $2.500M | $2.300M |
| YoY Change | 8.0% | 8.7% | -8.0% |
| Total Long-Term Liabilities | $2.700M | $2.500M | $2.300M |
| YoY Change | 8.0% | 8.7% | -8.0% |
| TOTAL LIABILITIES | |||
| Total Short-Term Liabilities | $63.80M | $57.50M | $46.10M |
| Total Long-Term Liabilities | $2.700M | $2.500M | $2.300M |
| Total Liabilities | $66.50M | $60.00M | $48.33M |
| YoY Change | 10.83% | 24.22% | 5.81% |
| SHAREHOLDERS EQUITY | |||
| Retained Earnings | $168.0M | ||
| YoY Change | 65.02% | ||
| Common Stock | $321.2M | ||
| YoY Change | 4.61% | ||
| Preferred Stock | |||
| YoY Change | |||
| Treasury Stock (at cost) | $93.41M | ||
| YoY Change | 32.97% | ||
| Treasury Stock Shares | $2.412M | ||
| Shareholders Equity | $514.8M | $468.0M | $390.7M |
| YoY Change | |||
| Total Liabilities & Shareholders Equity | $581.2M | $528.0M | $439.0M |
| YoY Change | 10.08% | 20.27% | 15.57% |
Cashflow Statement
| Concept | 2017 | 2016 | 2015 Q4 |
|---|---|---|---|
| OPERATING ACTIVITIES | |||
| Net Income | $148.1M | $126.2M | $24.50M |
| YoY Change | 17.37% | 31.38% | 13.43% |
| Depreciation, Depletion And Amortization | $19.30M | $17.80M | $4.600M |
| YoY Change | 8.43% | -3.78% | 4.55% |
| Cash From Operating Activities | $168.0M | $89.75M | $48.20M |
| YoY Change | 87.23% | -25.33% | 16.43% |
| INVESTING ACTIVITIES | |||
| Capital Expenditures | $12.09M | $6.385M | -$4.200M |
| YoY Change | 89.29% | 33.16% | 23.53% |
| Acquisitions | |||
| YoY Change | |||
| Other Investing Activities | $59.00K | -$414.0K | $9.700M |
| YoY Change | -114.25% | -164.49% | -218.29% |
| Cash From Investing Activities | -$53.65M | -$53.18M | $5.500M |
| YoY Change | 0.89% | 40.12% | -147.83% |
| FINANCING ACTIVITIES | |||
| Cash Dividend Paid | |||
| YoY Change | |||
| Common Stock Issuance & Retirement, Net | $42.46M | $23.93M | |
| YoY Change | 77.48% | 3.31% | |
| Debt Paid & Issued, Net | |||
| YoY Change | |||
| Cash From Financing Activities | -117.1M | -65.29M | -14.50M |
| YoY Change | 79.29% | 27.89% | -10.49% |
| NET CHANGE | |||
| Cash From Operating Activities | 168.0M | 89.75M | 48.20M |
| Cash From Investing Activities | -53.65M | -53.18M | 5.500M |
| Cash From Financing Activities | -117.1M | -65.29M | -14.50M |
| Net Change In Cash | -1.229M | -31.49M | 39.20M |
| YoY Change | -96.1% | -200.95% | 186.13% |
| FREE CASH FLOW | |||
| Cash From Operating Activities | $168.0M | $89.75M | $48.20M |
| Capital Expenditures | $12.09M | $6.385M | -$4.200M |
| Free Cash Flow | $155.9M | $83.36M | $52.40M |
| YoY Change | 87.07% | -27.76% | 16.96% |
Facts In Submission
| Frame | Concept Type | Concept / XBRL Key | Value | Unit |
|---|---|---|---|---|
| CY2015 | us-gaap |
Stock Repurchased And Retired During Period Value
StockRepurchasedAndRetiredDuringPeriodValue
|
23158000 | |
| CY2015 | us-gaap |
Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Tax
OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodTax
|
-111000 | |
| CY2015 | us-gaap |
Dividends Common Stock Cash
DividendsCommonStockCash
|
29839000 | |
| CY2017 | us-gaap |
General And Administrative Expense
GeneralAndAdministrativeExpense
|
12579000 | |
| CY2017 | us-gaap |
Operating Expenses
OperatingExpenses
|
195703000 | |
| CY2017 | mktx |
Transaction Costs
TransactionCosts
|
5797000 | |
| CY2016 | mktx |
Transaction Costs
TransactionCosts
|
6060000 | |
| CY2015 | mktx |
Transaction Costs
TransactionCosts
|
3313000 | |
| CY2016 | us-gaap |
Operating Expenses
OperatingExpenses
|
178317000 | |
| CY2016Q4 | mktx |
Trading Securities Accumulated Gross Unrealized Loss Before Tax
TradingSecuritiesAccumulatedGrossUnrealizedLossBeforeTax
|
234000 | |
| CY2017Q4 | us-gaap |
Marketable Securities
MarketableSecurities
|
239521000 | |
| CY2015 | us-gaap |
Weighted Average Number Of Shares Outstanding Basic
WeightedAverageNumberOfSharesOutstandingBasic
|
36690000 | |
| CY2016 | us-gaap |
Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest
IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest
|
191602000 | |
| CY2015 | us-gaap |
Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest
IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest
|
147900000 | |
| CY2017 | us-gaap |
Income Tax Expense Benefit
IncomeTaxExpenseBenefit
|
53679000 | |
| CY2016 | us-gaap |
Income Tax Expense Benefit
IncomeTaxExpenseBenefit
|
65430000 | |
| CY2015 | us-gaap |
Income Tax Expense Benefit
IncomeTaxExpenseBenefit
|
51863000 | |
| CY2017 | mktx |
Information Services Revenue
InformationServicesRevenue
|
25807000 | |
| CY2016 | mktx |
Information Services Revenue
InformationServicesRevenue
|
23269000 | |
| CY2015 | mktx |
Information Services Revenue
InformationServicesRevenue
|
22585000 | |
| CY2017 | mktx |
Post Trade Services Revenue
PostTradeServicesRevenue
|
11090000 | |
| CY2016 | mktx |
Post Trade Services Revenue
PostTradeServicesRevenue
|
10812000 | |
| CY2015 | mktx |
Post Trade Services Revenue
PostTradeServicesRevenue
|
11648000 | |
| CY2015 | us-gaap |
Common Stock Dividends Per Share Declared
CommonStockDividendsPerShareDeclared
|
0.80 | |
| CY2017 | us-gaap |
Weighted Average Number Of Shares Outstanding Basic
WeightedAverageNumberOfSharesOutstandingBasic
|
36864000 | |
| CY2016 | us-gaap |
Weighted Average Number Of Shares Outstanding Basic
WeightedAverageNumberOfSharesOutstandingBasic
|
36844000 | |
| CY2017 | us-gaap |
Net Income Loss
NetIncomeLoss
|
148089000 | |
| CY2017 | us-gaap |
Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest
IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest
|
201768000 | |
| CY2016 | us-gaap |
Net Income Loss
NetIncomeLoss
|
126172000 | |
| CY2017 | us-gaap |
Earnings Per Share Basic
EarningsPerShareBasic
|
4.02 | |
| CY2016 | us-gaap |
Earnings Per Share Basic
EarningsPerShareBasic
|
3.42 | |
| CY2015 | us-gaap |
Earnings Per Share Basic
EarningsPerShareBasic
|
2.62 | |
| CY2017 | us-gaap |
Earnings Per Share Diluted
EarningsPerShareDiluted
|
3.89 | |
| CY2016 | us-gaap |
Earnings Per Share Diluted
EarningsPerShareDiluted
|
3.34 | |
| CY2015 | us-gaap |
Earnings Per Share Diluted
EarningsPerShareDiluted
|
2.55 | |
| CY2017 | us-gaap |
Common Stock Dividends Per Share Declared
CommonStockDividendsPerShareDeclared
|
1.32 | |
| CY2016 | us-gaap |
Common Stock Dividends Per Share Declared
CommonStockDividendsPerShareDeclared
|
1.04 | |
| CY2017 | us-gaap |
Weighted Average Number Of Diluted Shares Outstanding
WeightedAverageNumberOfDilutedSharesOutstanding
|
38038000 | |
| CY2016 | us-gaap |
Weighted Average Number Of Diluted Shares Outstanding
WeightedAverageNumberOfDilutedSharesOutstanding
|
37738000 | |
| CY2015 | us-gaap |
Weighted Average Number Of Diluted Shares Outstanding
WeightedAverageNumberOfDilutedSharesOutstanding
|
37637000 | |
| CY2017 | us-gaap |
Other Comprehensive Income Loss Foreign Currency Transaction And Translation Adjustment Net Of Tax
OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax
|
2236000 | |
| CY2016 | us-gaap |
Other Comprehensive Income Loss Foreign Currency Transaction And Translation Adjustment Net Of Tax
OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax
|
-7037000 | |
| CY2015 | us-gaap |
Other Comprehensive Income Loss Foreign Currency Transaction And Translation Adjustment Net Of Tax
OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax
|
-512000 | |
| CY2017 | us-gaap |
Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Net Of Tax
OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodNetOfTax
|
-234000 | |
| CY2016 | us-gaap |
Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Net Of Tax
OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodNetOfTax
|
38000 | |
| CY2015 | us-gaap |
Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Net Of Tax
OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodNetOfTax
|
-180000 | |
| CY2015 | us-gaap |
Comprehensive Income Net Of Tax
ComprehensiveIncomeNetOfTax
|
95345000 | |
| CY2015 | us-gaap |
Other Comprehensive Income Foreign Currency Translation Gain Loss Arising During Period Tax
OtherComprehensiveIncomeForeignCurrencyTranslationGainLossArisingDuringPeriodTax
|
-258000 | |
| CY2014Q4 | us-gaap |
Stockholders Equity
StockholdersEquity
|
334208000 | |
| CY2015 | us-gaap |
Adjustments To Additional Paid In Capital Sharebased Compensation Requisite Service Period Recognition Value
AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue
|
12519000 | |
| CY2015 | us-gaap |
Stock Issued During Period Value Stock Options Exercised
StockIssuedDuringPeriodValueStockOptionsExercised
|
1824000 | |
| CY2015 | us-gaap |
Adjustments Related To Tax Withholding For Share Based Compensation
AdjustmentsRelatedToTaxWithholdingForShareBasedCompensation
|
4496000 | |
| CY2015 | us-gaap |
Adjustments To Additional Paid In Capital Tax Effect From Share Based Compensation
AdjustmentsToAdditionalPaidInCapitalTaxEffectFromShareBasedCompensation
|
4310000 | |
| CY2017 | us-gaap |
Other Comprehensive Income Loss Available For Sale Securities Adjustment Net Of Tax
OtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentNetOfTax
|
-234000 | |
| CY2017 | us-gaap |
Adjustments To Additional Paid In Capital Sharebased Compensation Requisite Service Period Recognition Value
AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue
|
14421000 | |
| CY2017 | us-gaap |
Stock Issued During Period Value Stock Options Exercised
StockIssuedDuringPeriodValueStockOptionsExercised
|
1972000 | |
| CY2017 | us-gaap |
Adjustments Related To Tax Withholding For Share Based Compensation
AdjustmentsRelatedToTaxWithholdingForShareBasedCompensation
|
27691000 | |
| CY2017 | us-gaap |
Stock Repurchased And Retired During Period Value
StockRepurchasedAndRetiredDuringPeriodValue
|
42461000 | |
| CY2017 | mktx |
Cumulative Effect Of Change In Accounting For Employee Share Based Payments
CumulativeEffectOfChangeInAccountingForEmployeeShareBasedPayments
|
17000 | |
| CY2016 | us-gaap |
Deferred Income Taxes And Tax Credits
DeferredIncomeTaxesAndTaxCredits
|
-2581000 | |
| CY2015 | us-gaap |
Deferred Income Taxes And Tax Credits
DeferredIncomeTaxesAndTaxCredits
|
-2424000 | |
| CY2016 | us-gaap |
Other Noncash Income Expense
OtherNoncashIncomeExpense
|
-10628000 | |
| CY2015 | us-gaap |
Other Noncash Income Expense
OtherNoncashIncomeExpense
|
-6359000 | |
| CY2016 | us-gaap |
Increase Decrease In Accounts Receivable
IncreaseDecreaseInAccountsReceivable
|
10429000 | |
| CY2015 | us-gaap |
Increase Decrease In Accounts Receivable
IncreaseDecreaseInAccountsReceivable
|
6748000 | |
| CY2016 | us-gaap |
Increase Decrease In Prepaid Deferred Expense And Other Assets
IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets
|
2125000 | |
| CY2015 | us-gaap |
Increase Decrease In Prepaid Deferred Expense And Other Assets
IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets
|
2662000 | |
| CY2017 | us-gaap |
Increase Decrease In Employee Related Liabilities
IncreaseDecreaseInEmployeeRelatedLiabilities
|
1719000 | |
| CY2016 | us-gaap |
Increase Decrease In Employee Related Liabilities
IncreaseDecreaseInEmployeeRelatedLiabilities
|
5487000 | |
| CY2015 | us-gaap |
Increase Decrease In Employee Related Liabilities
IncreaseDecreaseInEmployeeRelatedLiabilities
|
3986000 | |
| CY2017 | us-gaap |
Increase Decrease In Income Taxes
IncreaseDecreaseInIncomeTaxes
|
5770000 | |
| CY2016 | us-gaap |
Increase Decrease In Income Taxes
IncreaseDecreaseInIncomeTaxes
|
3221000 | |
| CY2015 | us-gaap |
Increase Decrease In Income Taxes
IncreaseDecreaseInIncomeTaxes
|
-941000 | |
| CY2017 | us-gaap |
Increase Decrease In Deferred Revenue
IncreaseDecreaseInDeferredRevenue
|
145000 | |
| CY2016 | us-gaap |
Increase Decrease In Deferred Revenue
IncreaseDecreaseInDeferredRevenue
|
203000 | |
| CY2015 | us-gaap |
Increase Decrease In Deferred Revenue
IncreaseDecreaseInDeferredRevenue
|
-153000 | |
| CY2017 | us-gaap |
Increase Decrease In Accounts Payable And Accrued Liabilities
IncreaseDecreaseInAccountsPayableAndAccruedLiabilities
|
-1614000 | |
| CY2016 | us-gaap |
Increase Decrease In Accounts Payable And Accrued Liabilities
IncreaseDecreaseInAccountsPayableAndAccruedLiabilities
|
2344000 | |
| CY2015 | us-gaap |
Increase Decrease In Accounts Payable And Accrued Liabilities
IncreaseDecreaseInAccountsPayableAndAccruedLiabilities
|
-9000 | |
| CY2017 | us-gaap |
Net Cash Provided By Used In Operating Activities Continuing Operations
NetCashProvidedByUsedInOperatingActivitiesContinuingOperations
|
168035000 | |
| CY2016 | us-gaap |
Net Cash Provided By Used In Operating Activities Continuing Operations
NetCashProvidedByUsedInOperatingActivitiesContinuingOperations
|
89747000 | |
| CY2015 | us-gaap |
Net Cash Provided By Used In Operating Activities Continuing Operations
NetCashProvidedByUsedInOperatingActivitiesContinuingOperations
|
124506000 | |
| CY2017 | us-gaap |
Proceeds From Maturities Prepayments And Calls Of Available For Sale Securities
ProceedsFromMaturitiesPrepaymentsAndCallsOfAvailableForSaleSecurities
|
187794000 | |
| CY2016 | us-gaap |
Proceeds From Maturities Prepayments And Calls Of Available For Sale Securities
ProceedsFromMaturitiesPrepaymentsAndCallsOfAvailableForSaleSecurities
|
46347000 | |
| CY2015 | us-gaap |
Proceeds From Maturities Prepayments And Calls Of Available For Sale Securities
ProceedsFromMaturitiesPrepaymentsAndCallsOfAvailableForSaleSecurities
|
35248000 | |
| CY2017 | us-gaap |
Payments To Acquire Available For Sale Securities
PaymentsToAcquireAvailableForSaleSecurities
|
215831000 | |
| CY2016 | us-gaap |
Payments To Acquire Available For Sale Securities
PaymentsToAcquireAvailableForSaleSecurities
|
81438000 | |
| CY2015 | us-gaap |
Payments To Acquire Available For Sale Securities
PaymentsToAcquireAvailableForSaleSecurities
|
57175000 | |
| CY2017 | us-gaap |
Payments To Acquire Property Plant And Equipment
PaymentsToAcquirePropertyPlantAndEquipment
|
12086000 | |
| CY2016 | us-gaap |
Payments To Acquire Property Plant And Equipment
PaymentsToAcquirePropertyPlantAndEquipment
|
6385000 | |
| CY2015 | us-gaap |
Payments To Acquire Property Plant And Equipment
PaymentsToAcquirePropertyPlantAndEquipment
|
4795000 | |
| CY2017 | us-gaap |
Payments To Develop Software
PaymentsToDevelopSoftware
|
13471000 | |
| CY2016 | us-gaap |
Payments To Develop Software
PaymentsToDevelopSoftware
|
12118000 | |
| CY2015 | us-gaap |
Payments To Develop Software
PaymentsToDevelopSoftware
|
10589000 | |
| CY2017 | us-gaap |
Payments For Proceeds From Other Investing Activities
PaymentsForProceedsFromOtherInvestingActivities
|
59000 | |
| CY2016 | us-gaap |
Payments For Proceeds From Other Investing Activities
PaymentsForProceedsFromOtherInvestingActivities
|
-414000 | |
| CY2015 | us-gaap |
Payments For Proceeds From Other Investing Activities
PaymentsForProceedsFromOtherInvestingActivities
|
642000 | |
| CY2017 | us-gaap |
Net Cash Provided By Used In Investing Activities Continuing Operations
NetCashProvidedByUsedInInvestingActivitiesContinuingOperations
|
-53653000 | |
| CY2016 | us-gaap |
Net Cash Provided By Used In Investing Activities Continuing Operations
NetCashProvidedByUsedInInvestingActivitiesContinuingOperations
|
-53180000 | |
| CY2015 | us-gaap |
Net Cash Provided By Used In Investing Activities Continuing Operations
NetCashProvidedByUsedInInvestingActivitiesContinuingOperations
|
-37953000 | |
| CY2017 | us-gaap |
Payments Of Ordinary Dividends
PaymentsOfOrdinaryDividends
|
48888000 | |
| CY2016 | us-gaap |
Payments Of Ordinary Dividends
PaymentsOfOrdinaryDividends
|
38495000 | |
| CY2015 | us-gaap |
Payments Of Ordinary Dividends
PaymentsOfOrdinaryDividends
|
29534000 | |
| CY2017 | us-gaap |
Proceeds From Stock Options Exercised
ProceedsFromStockOptionsExercised
|
1972000 | |
| CY2016 | us-gaap |
Proceeds From Stock Options Exercised
ProceedsFromStockOptionsExercised
|
2299000 | |
| CY2015 | us-gaap |
Proceeds From Stock Options Exercised
ProceedsFromStockOptionsExercised
|
1824000 | |
| CY2017 | us-gaap |
Payments Related To Tax Withholding For Share Based Compensation
PaymentsRelatedToTaxWithholdingForShareBasedCompensation
|
27691000 | |
| CY2016 | us-gaap |
Payments Related To Tax Withholding For Share Based Compensation
PaymentsRelatedToTaxWithholdingForShareBasedCompensation
|
5173000 | |
| CY2015 | us-gaap |
Payments Related To Tax Withholding For Share Based Compensation
PaymentsRelatedToTaxWithholdingForShareBasedCompensation
|
4496000 | |
| CY2015 | us-gaap |
Payments For Repurchase Of Common Stock
PaymentsForRepurchaseOfCommonStock
|
23158000 | |
| CY2017 | us-gaap |
Cash And Cash Equivalents Period Increase Decrease
CashAndCashEquivalentsPeriodIncreaseDecrease
|
-1229000 | |
| CY2017 | us-gaap |
Use Of Estimates
UseOfEstimates
|
<div> <p style="margin-bottom:0pt;margin-top:18pt;margin-left:2.26%;font-weight:bold;font-style:italic;font-size:10pt;font-family:Times New Roman;text-transform:none;font-variant: normal;text-indent:0.24%;">Use of Estimates </p> <p style="text-align:justify;margin-bottom:0pt;margin-top:6pt;font-size:10pt;font-family:Times New Roman;font-weight:normal;font-style:normal;text-transform:none;font-variant: normal;text-indent:4.54%;">The preparation of financial statements in conformity with GAAP requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosure of contingent assets and liabilities at the date of the financial statements and the reported amounts of revenues and expenses during the reporting period. Actual results could differ from those estimates. </p></div> | |
| CY2017 | us-gaap |
Prior Period Reclassification Adjustment Description
PriorPeriodReclassificationAdjustmentDescription
|
<div> <p style="margin-bottom:12pt;margin-top:0pt;margin-left:4.17%;text-indent:-1.67%;font-weight:bold;font-style:italic;font-family:Times New Roman;font-size:10pt;text-transform:none;font-variant: normal;">Reclassifications</p> <p style="text-align:justify;margin-bottom:0pt;margin-top:0pt;font-family:Times New Roman;font-size:10pt;font-weight:normal;font-style:normal;text-transform:none;font-variant: normal;text-indent:4.17%;">Certain reclassifications have been made to the prior years’ Consolidated Financial Statements in order to conform to the current year presentation. The Company reclassified certain revenue line items on the consolidated statements of operations to separately reflect information service revenues and post-trade service revenues. Such reclassifications had no effect on previously reported net income. </p></div> | |
| CY2016 | us-gaap |
Other Than Temporary Impairment Losses Investments Portion Recognized In Earnings Net Availableforsale Securities
OtherThanTemporaryImpairmentLossesInvestmentsPortionRecognizedInEarningsNetAvailableforsaleSecurities
|
0 | |
| CY2017 | us-gaap |
Provision For Doubtful Accounts
ProvisionForDoubtfulAccounts
|
400000 | |
| CY2016 | us-gaap |
Provision For Doubtful Accounts
ProvisionForDoubtfulAccounts
|
200000 | |
| CY2017 | us-gaap |
Allowance For Doubtful Accounts Receivable Write Offs
AllowanceForDoubtfulAccountsReceivableWriteOffs
|
100000 | |
| CY2016 | us-gaap |
Allowance For Doubtful Accounts Receivable Write Offs
AllowanceForDoubtfulAccountsReceivableWriteOffs
|
100000 | |
| CY2017Q4 | us-gaap |
Alternative Excess Net Capital
AlternativeExcessNetCapital
|
130500000 | |
| CY2017Q4 | us-gaap |
Alternative Net Capital Requirement1
AlternativeNetCapitalRequirement1
|
14800000 | |
| CY2017Q4 | mktx |
Money Market Funds Fair Value Disclosure
MoneyMarketFundsFairValueDisclosure
|
88562000 | |
| CY2016Q4 | mktx |
Money Market Funds Fair Value Disclosure
MoneyMarketFundsFairValueDisclosure
|
58573000 | |
| CY2016Q4 | us-gaap |
Trading Securities Cost
TradingSecuritiesCost
|
75606000 | |
| CY2017Q4 | mktx |
Trading Securities Accumulated Gross Unrealized Gain Before Tax
TradingSecuritiesAccumulatedGrossUnrealizedGainBeforeTax
|
468000 | |
| CY2017 | dei |
Entity Incorporation Date Of Incorporation
EntityIncorporationDateOfIncorporation
|
2000-04-11 | |
| CY2017 | mktx |
Cash Equivalents Maximum Period
CashEquivalentsMaximumPeriod
|
P3M | |
| CY2017 | us-gaap |
Other Than Temporary Impairment Losses Investments Portion Recognized In Earnings Net Availableforsale Securities
OtherThanTemporaryImpairmentLossesInvestmentsPortionRecognizedInEarningsNetAvailableforsaleSecurities
|
0 | |
| CY2015 | us-gaap |
Other Than Temporary Impairment Losses Investments Portion Recognized In Earnings Net Availableforsale Securities
OtherThanTemporaryImpairmentLossesInvestmentsPortionRecognizedInEarningsNetAvailableforsaleSecurities
|
0 | |
| CY2015Q4 | us-gaap |
Allowance For Doubtful Accounts Receivable
AllowanceForDoubtfulAccountsReceivable
|
100000 | |
| CY2015 | us-gaap |
Provision For Doubtful Accounts
ProvisionForDoubtfulAccounts
|
200000 | |
| CY2015 | us-gaap |
Allowance For Doubtful Accounts Receivable Write Offs
AllowanceForDoubtfulAccountsReceivableWriteOffs
|
100000 | |
| CY2017Q4 | us-gaap |
Assets Fair Value Disclosure
AssetsFairValueDisclosure
|
327381000 | |
| CY2016Q4 | us-gaap |
Assets Fair Value Disclosure
AssetsFairValueDisclosure
|
252711000 | |
| CY2017 | mktx |
Hedge Derivative Expiration Period
HedgeDerivativeExpirationPeriod
|
P1M | |
| CY2017Q4 | us-gaap |
Trading Securities Cost
TradingSecuritiesCost
|
94307000 | |
| CY2016Q4 | mktx |
Trading Securities Accumulated Gross Unrealized Gain Before Tax
TradingSecuritiesAccumulatedGrossUnrealizedGainBeforeTax
|
162000 | |
| CY2017Q4 | mktx |
Trading Securities Accumulated Gross Unrealized Loss Before Tax
TradingSecuritiesAccumulatedGrossUnrealizedLossBeforeTax
|
306000 | |
| CY2017Q4 | us-gaap |
Trading Securities
TradingSecurities
|
94469000 | |
| CY2016Q4 | us-gaap |
Trading Securities
TradingSecurities
|
75534000 | |
| CY2017Q4 | mktx |
Marketable Securities Amortized Cost
MarketableSecuritiesAmortizedCost
|
239833000 | |
| CY2016Q4 | mktx |
Marketable Securities Amortized Cost
MarketableSecuritiesAmortizedCost
|
194679000 | |
| CY2017Q4 | mktx |
Marketable Securities Accumulated Gross Unrealized Gain Before Tax
MarketableSecuritiesAccumulatedGrossUnrealizedGainBeforeTax
|
477000 | |
| CY2016Q4 | mktx |
Marketable Securities Accumulated Gross Unrealized Gain Before Tax
MarketableSecuritiesAccumulatedGrossUnrealizedGainBeforeTax
|
175000 | |
| CY2017Q4 | mktx |
Marketable Securities Accumulated Gross Unrealized Loss Before Tax
MarketableSecuritiesAccumulatedGrossUnrealizedLossBeforeTax
|
789000 | |
| CY2016Q4 | mktx |
Marketable Securities Accumulated Gross Unrealized Loss Before Tax
MarketableSecuritiesAccumulatedGrossUnrealizedLossBeforeTax
|
450000 | |
| CY2017Q4 | mktx |
Marketable Securities Within One Year Fair Value
MarketableSecuritiesWithinOneYearFairValue
|
130738000 | |
| CY2016Q4 | mktx |
Marketable Securities Within One Year Fair Value
MarketableSecuritiesWithinOneYearFairValue
|
117904000 | |
| CY2017Q4 | us-gaap |
Finite Lived Intangible Assets Amortization Expense Year Five
FiniteLivedIntangibleAssetsAmortizationExpenseYearFive
|
400000 | |
| CY2017Q4 | mktx |
Marketable Securities After One Through Five Years Fair Value
MarketableSecuritiesAfterOneThroughFiveYearsFairValue
|
108783000 | |
| CY2016Q4 | mktx |
Marketable Securities After One Through Five Years Fair Value
MarketableSecuritiesAfterOneThroughFiveYearsFairValue
|
76500000 | |
| CY2017 | us-gaap |
Proceeds From Sale And Maturity Of Marketable Securities
ProceedsFromSaleAndMaturityOfMarketableSecurities
|
219200000 | |
| CY2016 | us-gaap |
Proceeds From Sale And Maturity Of Marketable Securities
ProceedsFromSaleAndMaturityOfMarketableSecurities
|
69500000 | |
| CY2015 | us-gaap |
Proceeds From Sale And Maturity Of Marketable Securities
ProceedsFromSaleAndMaturityOfMarketableSecurities
|
35200000 | |
| CY2017 | us-gaap |
Trading Securities Unrealized Holding Loss
TradingSecuritiesUnrealizedHoldingLoss
|
100000 | |
| CY2016 | us-gaap |
Trading Securities Unrealized Holding Loss
TradingSecuritiesUnrealizedHoldingLoss
|
200000 | |
| CY2017Q4 | us-gaap |
Finite Lived Intangible Assets Gross
FiniteLivedIntangibleAssetsGross
|
12167000 | |
| CY2017Q4 | us-gaap |
Finite Lived Intangible Assets Accumulated Amortization
FiniteLivedIntangibleAssetsAccumulatedAmortization
|
8821000 | |
| CY2017Q4 | us-gaap |
Finite Lived Intangible Assets Net
FiniteLivedIntangibleAssetsNet
|
3346000 | |
| CY2016Q4 | us-gaap |
Finite Lived Intangible Assets Gross
FiniteLivedIntangibleAssetsGross
|
12148000 | |
| CY2016Q4 | us-gaap |
Finite Lived Intangible Assets Accumulated Amortization
FiniteLivedIntangibleAssetsAccumulatedAmortization
|
8417000 | |
| CY2016Q4 | us-gaap |
Finite Lived Intangible Assets Net
FiniteLivedIntangibleAssetsNet
|
3731000 | |
| CY2017 | us-gaap |
Amortization Of Intangible Assets
AmortizationOfIntangibleAssets
|
400000 | |
| CY2016 | us-gaap |
Amortization Of Intangible Assets
AmortizationOfIntangibleAssets
|
700000 | |
| CY2015 | us-gaap |
Amortization Of Intangible Assets
AmortizationOfIntangibleAssets
|
2300000 | |
| CY2017Q4 | us-gaap |
Finite Lived Intangible Assets Amortization Expense Next Twelve Months
FiniteLivedIntangibleAssetsAmortizationExpenseNextTwelveMonths
|
400000 | |
| CY2017Q4 | us-gaap |
Finite Lived Intangible Assets Amortization Expense Year Two
FiniteLivedIntangibleAssetsAmortizationExpenseYearTwo
|
400000 | |
| CY2017Q4 | us-gaap |
Finite Lived Intangible Assets Amortization Expense Year Three
FiniteLivedIntangibleAssetsAmortizationExpenseYearThree
|
400000 | |
| CY2017Q4 | us-gaap |
Finite Lived Intangible Assets Amortization Expense Year Four
FiniteLivedIntangibleAssetsAmortizationExpenseYearFour
|
400000 | |
| CY2017Q4 | us-gaap |
Property Plant And Equipment Gross
PropertyPlantAndEquipmentGross
|
140012000 | |
| CY2016Q4 | us-gaap |
Property Plant And Equipment Gross
PropertyPlantAndEquipmentGross
|
106283000 | |
| CY2017Q4 | us-gaap |
Accumulated Depreciation Depletion And Amortization Property Plant And Equipment
AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment
|
101464000 | |
| CY2016Q4 | us-gaap |
Accumulated Depreciation Depletion And Amortization Property Plant And Equipment
AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment
|
75179000 | |
| CY2017 | us-gaap |
Capitalized Computer Software Additions
CapitalizedComputerSoftwareAdditions
|
13900000 | |
| CY2016 | us-gaap |
Capitalized Computer Software Additions
CapitalizedComputerSoftwareAdditions
|
12300000 | |
| CY2017 | us-gaap |
Current Federal Tax Expense Benefit
CurrentFederalTaxExpenseBenefit
|
36045000 | |
| CY2016 | us-gaap |
Current Federal Tax Expense Benefit
CurrentFederalTaxExpenseBenefit
|
45455000 | |
| CY2015 | us-gaap |
Current Federal Tax Expense Benefit
CurrentFederalTaxExpenseBenefit
|
38357000 | |
| CY2017 | us-gaap |
Current State And Local Tax Expense Benefit
CurrentStateAndLocalTaxExpenseBenefit
|
3848000 | |
| CY2016 | us-gaap |
Current State And Local Tax Expense Benefit
CurrentStateAndLocalTaxExpenseBenefit
|
7087000 | |
| CY2015 | us-gaap |
Current State And Local Tax Expense Benefit
CurrentStateAndLocalTaxExpenseBenefit
|
7180000 | |
| CY2017 | us-gaap |
Current Foreign Tax Expense Benefit
CurrentForeignTaxExpenseBenefit
|
7234000 | |
| CY2016 | us-gaap |
Current Foreign Tax Expense Benefit
CurrentForeignTaxExpenseBenefit
|
6166000 | |
| CY2015 | us-gaap |
Current Foreign Tax Expense Benefit
CurrentForeignTaxExpenseBenefit
|
4346000 | |
| CY2017 | us-gaap |
Current Income Tax Expense Benefit
CurrentIncomeTaxExpenseBenefit
|
47127000 | |
| CY2016 | us-gaap |
Current Income Tax Expense Benefit
CurrentIncomeTaxExpenseBenefit
|
58708000 | |
| CY2015 | us-gaap |
Current Income Tax Expense Benefit
CurrentIncomeTaxExpenseBenefit
|
49883000 | |
| CY2017 | us-gaap |
Deferred Federal Income Tax Expense Benefit
DeferredFederalIncomeTaxExpenseBenefit
|
6171000 | |
| CY2016 | us-gaap |
Deferred Federal Income Tax Expense Benefit
DeferredFederalIncomeTaxExpenseBenefit
|
5884000 | |
| CY2015 | us-gaap |
Deferred Federal Income Tax Expense Benefit
DeferredFederalIncomeTaxExpenseBenefit
|
1492000 | |
| CY2017 | us-gaap |
Deferred State And Local Income Tax Expense Benefit
DeferredStateAndLocalIncomeTaxExpenseBenefit
|
661000 | |
| CY2016 | us-gaap |
Deferred State And Local Income Tax Expense Benefit
DeferredStateAndLocalIncomeTaxExpenseBenefit
|
1141000 | |
| CY2015 | us-gaap |
Deferred State And Local Income Tax Expense Benefit
DeferredStateAndLocalIncomeTaxExpenseBenefit
|
299000 | |
| CY2017 | us-gaap |
Deferred Foreign Income Tax Expense Benefit
DeferredForeignIncomeTaxExpenseBenefit
|
-280000 | |
| CY2016 | us-gaap |
Deferred Foreign Income Tax Expense Benefit
DeferredForeignIncomeTaxExpenseBenefit
|
-303000 | |
| CY2015 | us-gaap |
Deferred Foreign Income Tax Expense Benefit
DeferredForeignIncomeTaxExpenseBenefit
|
189000 | |
| CY2017 | us-gaap |
Deferred Income Tax Expense Benefit
DeferredIncomeTaxExpenseBenefit
|
6552000 | |
| CY2016 | us-gaap |
Deferred Income Tax Expense Benefit
DeferredIncomeTaxExpenseBenefit
|
6722000 | |
| CY2015 | us-gaap |
Deferred Income Tax Expense Benefit
DeferredIncomeTaxExpenseBenefit
|
1980000 | |
| CY2017 | us-gaap |
Income Loss From Continuing Operations Before Income Taxes Domestic
IncomeLossFromContinuingOperationsBeforeIncomeTaxesDomestic
|
165200000 | |
| CY2016 | us-gaap |
Income Loss From Continuing Operations Before Income Taxes Domestic
IncomeLossFromContinuingOperationsBeforeIncomeTaxesDomestic
|
161900000 | |
| CY2015 | us-gaap |
Income Loss From Continuing Operations Before Income Taxes Domestic
IncomeLossFromContinuingOperationsBeforeIncomeTaxesDomestic
|
126400000 | |
| CY2017 | us-gaap |
Effective Income Tax Rate Reconciliation At Federal Statutory Income Tax Rate
EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate
|
0.35 | |
| CY2017 | mktx |
Tax Cuts And Jobs Act Of2017 Incomplete Accounting Provisional Income Tax Expense Benefit
TaxCutsAndJobsActOf2017IncompleteAccountingProvisionalIncomeTaxExpenseBenefit
|
11700000 | |
| CY2017Q1 | us-gaap |
Common Stock Dividends Per Share Declared
CommonStockDividendsPerShareDeclared
|
0.33 | |
| CY2017Q2 | us-gaap |
Common Stock Dividends Per Share Declared
CommonStockDividendsPerShareDeclared
|
0.33 | |
| CY2017Q3 | us-gaap |
Common Stock Dividends Per Share Declared
CommonStockDividendsPerShareDeclared
|
0.33 | |
| CY2017Q4 | us-gaap |
Common Stock Dividends Per Share Declared
CommonStockDividendsPerShareDeclared
|
0.33 | |
| CY2016Q1 | us-gaap |
Common Stock Dividends Per Share Declared
CommonStockDividendsPerShareDeclared
|
0.26 | |
| CY2015 | us-gaap |
Share Based Compensation Arrangement By Share Based Payment Award Options Grants In Period Gross
ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodGross
|
120650 | |
| CY2017Q4 | mktx |
Number Of Lease Agreements
NumberOfLeaseAgreements
|
1 | |
| CY2017 | mktx |
Lease Expiration Dates
LeaseExpirationDates
|
2020-11 | |
| CY2017Q4 | us-gaap |
Contractual Obligation
ContractualObligation
|
800000 | |
| CY2017 | us-gaap |
Principal Transactions Revenue
PrincipalTransactionsRevenue
|
45700000 | |
| CY2016 | us-gaap |
Principal Transactions Revenue
PrincipalTransactionsRevenue
|
37700000 | |
| CY2016 | us-gaap |
Defined Contribution Plan Employer Discretionary Contribution Amount
DefinedContributionPlanEmployerDiscretionaryContributionAmount
|
1900000 | |
| CY2015 | us-gaap |
Defined Contribution Plan Employer Discretionary Contribution Amount
DefinedContributionPlanEmployerDiscretionaryContributionAmount
|
1900000 | |
| CY2016Q4 | mktx |
Mutual Fund Investments And Deferred Compensation Obligation At Fair Value
MutualFundInvestmentsAndDeferredCompensationObligationAtFairValue
|
1300000 | |
| CY2017 | mktx |
Deferred Compensation Arrangement Trading Gain And Compensation Expense
DeferredCompensationArrangementTradingGainAndCompensationExpense
|
400000 | |
| CY2017 | mktx |
Concentration Risk Number Of Customer
ConcentrationRiskNumberOfCustomer
|
0 | |
| CY2017 | mktx |
Tax Cuts And Jobs Act Of2017 Incomplete Accounting Change In Tax Rate Deferred Tax Assets Provisional Income Tax Benefit
TaxCutsAndJobsActOf2017IncompleteAccountingChangeInTaxRateDeferredTaxAssetsProvisionalIncomeTaxBenefit
|
6700000 | |
| CY2017 | mktx |
Tax Cuts And Jobs Act Of2017 Incomplete Accounting Change In Tax For Accumulated Foreign Earnings Provisional Tax Benefit
TaxCutsAndJobsActOf2017IncompleteAccountingChangeInTaxForAccumulatedForeignEarningsProvisionalTaxBenefit
|
5000000 | |
| CY2016 | us-gaap |
Effective Income Tax Rate Reconciliation At Federal Statutory Income Tax Rate
EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate
|
0.350 | |
| CY2015 | us-gaap |
Effective Income Tax Rate Reconciliation At Federal Statutory Income Tax Rate
EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate
|
0.350 | |
| CY2017 | us-gaap |
Effective Income Tax Rate Reconciliation State And Local Income Taxes
EffectiveIncomeTaxRateReconciliationStateAndLocalIncomeTaxes
|
0.015 | |
| CY2016 | us-gaap |
Effective Income Tax Rate Reconciliation State And Local Income Taxes
EffectiveIncomeTaxRateReconciliationStateAndLocalIncomeTaxes
|
0.029 | |
| CY2015 | us-gaap |
Effective Income Tax Rate Reconciliation State And Local Income Taxes
EffectiveIncomeTaxRateReconciliationStateAndLocalIncomeTaxes
|
0.034 | |
| CY2017 | us-gaap |
Effective Income Tax Rate Reconciliation Tax Credits Research
EffectiveIncomeTaxRateReconciliationTaxCreditsResearch
|
0.012 | |
| CY2016 | us-gaap |
Effective Income Tax Rate Reconciliation Tax Credits Research
EffectiveIncomeTaxRateReconciliationTaxCreditsResearch
|
0.013 | |
| CY2015 | us-gaap |
Effective Income Tax Rate Reconciliation Tax Credits Research
EffectiveIncomeTaxRateReconciliationTaxCreditsResearch
|
0.013 | |
| CY2017 | us-gaap |
Effective Income Tax Rate Reconciliation Foreign Income Tax Rate Differential
EffectiveIncomeTaxRateReconciliationForeignIncomeTaxRateDifferential
|
-0.029 | |
| CY2016 | us-gaap |
Effective Income Tax Rate Reconciliation Foreign Income Tax Rate Differential
EffectiveIncomeTaxRateReconciliationForeignIncomeTaxRateDifferential
|
-0.023 | |
| CY2015 | us-gaap |
Effective Income Tax Rate Reconciliation Foreign Income Tax Rate Differential
EffectiveIncomeTaxRateReconciliationForeignIncomeTaxRateDifferential
|
-0.020 | |
| CY2017 | us-gaap |
Effective Income Tax Rate Reconciliation Nondeductible Expense Share Based Compensation Cost
EffectiveIncomeTaxRateReconciliationNondeductibleExpenseShareBasedCompensationCost
|
0.116 | |
| CY2017 | us-gaap |
Effective Income Tax Rate Reconciliation Change In Enacted Tax Rate
EffectiveIncomeTaxRateReconciliationChangeInEnactedTaxRate
|
0.058 | |
| CY2016 | us-gaap |
Effective Income Tax Rate Reconciliation Other Adjustments
EffectiveIncomeTaxRateReconciliationOtherAdjustments
|
0.002 | |
| CY2017 | us-gaap |
Effective Income Tax Rate Continuing Operations
EffectiveIncomeTaxRateContinuingOperations
|
0.266 | |
| CY2016 | us-gaap |
Effective Income Tax Rate Continuing Operations
EffectiveIncomeTaxRateContinuingOperations
|
0.341 | |
| CY2015 | us-gaap |
Effective Income Tax Rate Continuing Operations
EffectiveIncomeTaxRateContinuingOperations
|
0.351 | |
| CY2017Q4 | us-gaap |
Deferred Tax Assets Capital Loss Carryforwards
DeferredTaxAssetsCapitalLossCarryforwards
|
4648000 | |
| CY2016Q4 | us-gaap |
Deferred Tax Assets Capital Loss Carryforwards
DeferredTaxAssetsCapitalLossCarryforwards
|
7235000 | |
| CY2017Q4 | us-gaap |
Deferred Tax Assets Tax Deferred Expense Compensation And Benefits Share Based Compensation Cost
DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsShareBasedCompensationCost
|
4534000 | |
| CY2016Q4 | us-gaap |
Deferred Tax Assets Tax Deferred Expense Compensation And Benefits Share Based Compensation Cost
DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsShareBasedCompensationCost
|
11307000 | |
| CY2017Q4 | us-gaap |
Deferred Tax Assets Tax Deferred Expense Other
DeferredTaxAssetsTaxDeferredExpenseOther
|
1143000 | |
| CY2016Q4 | us-gaap |
Deferred Tax Assets Tax Deferred Expense Other
DeferredTaxAssetsTaxDeferredExpenseOther
|
1468000 | |
| CY2017Q4 | us-gaap |
Deferred Tax Assets Gross
DeferredTaxAssetsGross
|
11197000 | |
| CY2016Q4 | us-gaap |
Deferred Tax Assets Gross
DeferredTaxAssetsGross
|
21919000 | |
| CY2017Q4 | us-gaap |
Deferred Tax Assets Valuation Allowance
DeferredTaxAssetsValuationAllowance
|
4648000 | |
| CY2016Q4 | us-gaap |
Deferred Tax Assets Valuation Allowance
DeferredTaxAssetsValuationAllowance
|
7235000 | |
| CY2017Q4 | us-gaap |
Deferred Tax Assets Net
DeferredTaxAssetsNet
|
6549000 | |
| CY2016Q4 | us-gaap |
Deferred Tax Assets Net
DeferredTaxAssetsNet
|
14684000 | |
| CY2017Q4 | mktx |
Deferred Tax Liabilities Depreciation And Amortization
DeferredTaxLiabilitiesDepreciationAndAmortization
|
1369000 | |
| CY2016Q4 | mktx |
Deferred Tax Liabilities Depreciation And Amortization
DeferredTaxLiabilitiesDepreciationAndAmortization
|
1456000 | |
| CY2017Q4 | us-gaap |
Deferred Tax Liabilities Deferred Expense Capitalized Software
DeferredTaxLiabilitiesDeferredExpenseCapitalizedSoftware
|
3479000 | |
| CY2016Q4 | us-gaap |
Deferred Tax Liabilities Deferred Expense Capitalized Software
DeferredTaxLiabilitiesDeferredExpenseCapitalizedSoftware
|
4923000 | |
| CY2017Q4 | us-gaap |
Deferred Tax Liabilities Goodwill And Intangible Assets
DeferredTaxLiabilitiesGoodwillAndIntangibleAssets
|
967000 | |
| CY2016Q4 | us-gaap |
Deferred Tax Liabilities Goodwill And Intangible Assets
DeferredTaxLiabilitiesGoodwillAndIntangibleAssets
|
1037000 | |
| CY2017Q4 | us-gaap |
Deferred Tax Assets Liabilities Net
DeferredTaxAssetsLiabilitiesNet
|
734000 | |
| CY2016Q4 | us-gaap |
Deferred Tax Assets Liabilities Net
DeferredTaxAssetsLiabilitiesNet
|
7268000 | |
| CY2017 | mktx |
Additional Annual Limitations
AdditionalAnnualLimitations
|
50% or greater change | |
| CY2017Q4 | mktx |
Percentage Of Change In Ownership
PercentageOfChangeInOwnership
|
0.50 | |
| CY2017 | mktx |
Additional Annual Limitations Period
AdditionalAnnualLimitationsPeriod
|
P3Y | |
| CY2017Q4 | mktx |
Capital Loss Carryforward Amount
CapitalLossCarryforwardAmount
|
20600000 | |
| CY2017 | mktx |
Capital Loss Carryback During Current Period
CapitalLossCarrybackDuringCurrentPeriod
|
1200000 | |
| CY2015Q4 | us-gaap |
Deferred Tax Assets Valuation Allowance
DeferredTaxAssetsValuationAllowance
|
7294000 | |
| CY2014Q4 | us-gaap |
Deferred Tax Assets Valuation Allowance
DeferredTaxAssetsValuationAllowance
|
7428000 | |
| CY2017 | mktx |
Change In Valuation Allowance For Federal And State Tax Rate
ChangeInValuationAllowanceForFederalAndStateTaxRate
|
2587000 | |
| CY2016 | mktx |
Change In Valuation Allowance For Federal And State Tax Rate
ChangeInValuationAllowanceForFederalAndStateTaxRate
|
59000 | |
| CY2015 | mktx |
Change In Valuation Allowance For Federal And State Tax Rate
ChangeInValuationAllowanceForFederalAndStateTaxRate
|
134000 | |
| CY2016Q4 | us-gaap |
Unrecognized Tax Benefits
UnrecognizedTaxBenefits
|
29000 | |
| CY2017 | mktx |
Unrecognized Tax Benefits Increases Resulting From State And Local Apportionment
UnrecognizedTaxBenefitsIncreasesResultingFromStateAndLocalApportionment
|
2650000 | |
| CY2017 | us-gaap |
Unrecognized Tax Benefits Decreases Resulting From Prior Period Tax Positions
UnrecognizedTaxBenefitsDecreasesResultingFromPriorPeriodTaxPositions
|
29000 | |
| CY2017Q4 | us-gaap |
Unrecognized Tax Benefits
UnrecognizedTaxBenefits
|
2650000 | |
| CY2015Q4 | us-gaap |
Unrecognized Tax Benefits
UnrecognizedTaxBenefits
|
265000 | |
| CY2016 | us-gaap |
Unrecognized Tax Benefits Decreases Resulting From Prior Period Tax Positions
UnrecognizedTaxBenefitsDecreasesResultingFromPriorPeriodTaxPositions
|
236000 | |
| CY2014Q4 | us-gaap |
Unrecognized Tax Benefits
UnrecognizedTaxBenefits
|
265000 | |
| CY2015 | us-gaap |
Unrecognized Tax Benefits Decreases Resulting From Prior Period Tax Positions
UnrecognizedTaxBenefitsDecreasesResultingFromPriorPeriodTaxPositions
|
0 | |
| CY2017 | us-gaap |
Common Stock Voting Rights
CommonStockVotingRights
|
One | |
| CY2016Q2 | us-gaap |
Common Stock Dividends Per Share Declared
CommonStockDividendsPerShareDeclared
|
0.26 | |
| CY2016Q3 | us-gaap |
Common Stock Dividends Per Share Declared
CommonStockDividendsPerShareDeclared
|
0.26 | |
| CY2016Q4 | us-gaap |
Common Stock Dividends Per Share Declared
CommonStockDividendsPerShareDeclared
|
0.26 | |
| CY2015Q1 | us-gaap |
Common Stock Dividends Per Share Declared
CommonStockDividendsPerShareDeclared
|
0.20 | |
| CY2015Q2 | us-gaap |
Common Stock Dividends Per Share Declared
CommonStockDividendsPerShareDeclared
|
0.20 | |
| CY2015Q3 | us-gaap |
Common Stock Dividends Per Share Declared
CommonStockDividendsPerShareDeclared
|
0.20 | |
| CY2015Q4 | us-gaap |
Common Stock Dividends Per Share Declared
CommonStockDividendsPerShareDeclared
|
0.20 | |
| CY2017Q4 | us-gaap |
Share Based Compensation Arrangement By Share Based Payment Award Number Of Shares Available For Grant
ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAvailableForGrant
|
219983 | |
| CY2017 | us-gaap |
Share Based Compensation Arrangement By Share Based Payment Award Options Grants In Period Weighted Average Grant Date Fair Value
ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageGrantDateFairValue
|
40.08 | |
| CY2016 | us-gaap |
Share Based Compensation Arrangement By Share Based Payment Award Options Grants In Period Weighted Average Grant Date Fair Value
ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageGrantDateFairValue
|
32.24 | |
| CY2015 | us-gaap |
Share Based Compensation Arrangement By Share Based Payment Award Options Grants In Period Weighted Average Grant Date Fair Value
ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageGrantDateFairValue
|
36.46 | |
| CY2017 | us-gaap |
Sharebased Compensation Arrangement By Sharebased Payment Award Fair Value Assumptions Expected Term1
SharebasedCompensationArrangementBySharebasedPaymentAwardFairValueAssumptionsExpectedTerm1
|
P5Y | |
| CY2016 | us-gaap |
Sharebased Compensation Arrangement By Sharebased Payment Award Fair Value Assumptions Expected Term1
SharebasedCompensationArrangementBySharebasedPaymentAwardFairValueAssumptionsExpectedTerm1
|
P6Y | |
| CY2015 | us-gaap |
Sharebased Compensation Arrangement By Sharebased Payment Award Fair Value Assumptions Expected Term1
SharebasedCompensationArrangementBySharebasedPaymentAwardFairValueAssumptionsExpectedTerm1
|
P7Y | |
| CY2017 | us-gaap |
Share Based Compensation Arrangement By Share Based Payment Award Fair Value Assumptions Risk Free Interest Rate Minimum
ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsRiskFreeInterestRateMinimum
|
0.019 | |
| CY2016 | us-gaap |
Share Based Compensation Arrangement By Share Based Payment Award Fair Value Assumptions Risk Free Interest Rate Minimum
ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsRiskFreeInterestRateMinimum
|
0.019 | |
| CY2015 | us-gaap |
Share Based Compensation Arrangement By Share Based Payment Award Fair Value Assumptions Risk Free Interest Rate Minimum
ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsRiskFreeInterestRateMinimum
|
0.019 | |
| CY2017 | us-gaap |
Share Based Compensation Arrangement By Share Based Payment Award Fair Value Assumptions Expected Volatility Rate Minimum
ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedVolatilityRateMinimum
|
0.280 | |
| CY2016 | us-gaap |
Share Based Compensation Arrangement By Share Based Payment Award Fair Value Assumptions Expected Volatility Rate Minimum
ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedVolatilityRateMinimum
|
0.330 | |
| CY2015 | us-gaap |
Share Based Compensation Arrangement By Share Based Payment Award Fair Value Assumptions Expected Volatility Rate Minimum
ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedVolatilityRateMinimum
|
0.567 | |
| CY2017 | us-gaap |
Share Based Compensation Arrangement By Share Based Payment Award Fair Value Assumptions Expected Dividend Rate
ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedDividendRate
|
0.008 | |
| CY2016 | us-gaap |
Share Based Compensation Arrangement By Share Based Payment Award Fair Value Assumptions Expected Dividend Rate
ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedDividendRate
|
0.010 | |
| CY2015 | us-gaap |
Share Based Compensation Arrangement By Share Based Payment Award Fair Value Assumptions Expected Dividend Rate
ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedDividendRate
|
0.011 | |
| CY2014Q4 | us-gaap |
Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Number
ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber
|
1014420 | |
| CY2015 | us-gaap |
Stock Issued During Period Shares Stock Options Exercised
StockIssuedDuringPeriodSharesStockOptionsExercised
|
196034 | |
| CY2015Q4 | us-gaap |
Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Number
ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber
|
939036 | |
| CY2016 | us-gaap |
Share Based Compensation Arrangement By Share Based Payment Award Options Grants In Period Gross
ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodGross
|
112988 | |
| CY2016 | us-gaap |
Share Based Compensation Arrangement By Share Based Payment Award Options Forfeitures In Period
ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsForfeituresInPeriod
|
874 | |
| CY2016 | us-gaap |
Stock Issued During Period Shares Stock Options Exercised
StockIssuedDuringPeriodSharesStockOptionsExercised
|
195410 | |
| CY2016Q4 | us-gaap |
Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Number
ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber
|
855740 | |
| CY2017 | us-gaap |
Share Based Compensation Arrangement By Share Based Payment Award Options Grants In Period Gross
ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodGross
|
54838 | |
| CY2017 | us-gaap |
Stock Issued During Period Shares Stock Options Exercised
StockIssuedDuringPeriodSharesStockOptionsExercised
|
380967 | |
| CY2017Q4 | us-gaap |
Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Number
ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber
|
529611 | |
| CY2017Q4 | us-gaap |
Share Based Compensation Arrangement By Share Based Payment Award Options Exercisable Number
ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableNumber
|
254079 | |
| CY2014Q4 | us-gaap |
Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Weighted Average Exercise Price
ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice
|
13.81 | |
| CY2015 | us-gaap |
Share Based Compensation Arrangements By Share Based Payment Award Options Grants In Period Weighted Average Exercise Price
ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageExercisePrice
|
88.15 | |
| CY2015 | us-gaap |
Share Based Compensation Arrangements By Share Based Payment Award Options Exercises In Period Weighted Average Exercise Price
ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsExercisesInPeriodWeightedAverageExercisePrice
|
11.60 | |
| CY2015Q4 | us-gaap |
Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Weighted Average Exercise Price
ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice
|
23.83 | |
| CY2016 | us-gaap |
Share Based Compensation Arrangements By Share Based Payment Award Options Grants In Period Weighted Average Exercise Price
ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageExercisePrice
|
102.40 | |
| CY2016 | us-gaap |
Share Based Compensation Arrangements By Share Based Payment Award Options Forfeitures In Period Weighted Average Exercise Price
ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsForfeituresInPeriodWeightedAverageExercisePrice
|
101.77 | |
| CY2016 | us-gaap |
Share Based Compensation Arrangements By Share Based Payment Award Options Exercises In Period Weighted Average Exercise Price
ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsExercisesInPeriodWeightedAverageExercisePrice
|
12.35 | |
| CY2016Q4 | us-gaap |
Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Weighted Average Exercise Price
ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice
|
36.80 | |
| CY2017 | us-gaap |
Share Based Compensation Arrangements By Share Based Payment Award Options Grants In Period Weighted Average Exercise Price
ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageExercisePrice
|
156.85 | |
| CY2017 | us-gaap |
Share Based Compensation Arrangements By Share Based Payment Award Options Exercises In Period Weighted Average Exercise Price
ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsExercisesInPeriodWeightedAverageExercisePrice
|
11.26 | |
| CY2017Q4 | us-gaap |
Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Weighted Average Exercise Price
ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice
|
67.60 | |
| CY2017Q4 | us-gaap |
Share Based Compensation Arrangement By Share Based Payment Award Options Exercisable Weighted Average Exercise Price
ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableWeightedAverageExercisePrice
|
24.61 | |
| CY2017 | us-gaap |
Sharebased Compensation Arrangement By Sharebased Payment Award Options Outstanding Weighted Average Remaining Contractual Term2
SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsOutstandingWeightedAverageRemainingContractualTerm2
|
P3Y3M18D | |
| CY2017 | us-gaap |
Sharebased Compensation Arrangement By Sharebased Payment Award Options Exercisable Weighted Average Remaining Contractual Term1
SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsExercisableWeightedAverageRemainingContractualTerm1
|
P3Y | |
| CY2017 | us-gaap |
Share Based Compensation Arrangement By Share Based Payment Award Options Exercises In Period Total Intrinsic Value
ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisesInPeriodTotalIntrinsicValue
|
68068000 | |
| CY2017Q4 | us-gaap |
Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Intrinsic Value
ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingIntrinsicValue
|
71046000 | |
| CY2017Q4 | us-gaap |
Sharebased Compensation Arrangement By Sharebased Payment Award Options Exercisable Intrinsic Value1
SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsExercisableIntrinsicValue1
|
45009000 | |
| CY2017Q4 | mktx |
Closing Price Of Common Stock
ClosingPriceOfCommonStock
|
201.75 | |
| CY2017Q4 | us-gaap |
Employee Service Share Based Compensation Nonvested Awards Total Compensation Cost Not Yet Recognized
EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized
|
4300000 | |
| CY2017 | us-gaap |
Employee Service Share Based Compensation Nonvested Awards Total Compensation Cost Not Yet Recognized Period For Recognition1
EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedPeriodForRecognition1
|
P2Y2M12D | |
| CY2017 | mktx |
Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Performance Shares Payout Range Minimum
ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsPerformanceSharesPayoutRangeMinimum
|
0.00 | |
| CY2017 | mktx |
Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Performance Shares Payout Range Maximum
ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsPerformanceSharesPayoutRangeMaximum
|
1.50 | |
| CY2017 | us-gaap |
Incremental Common Shares Attributable To Share Based Payment Arrangements
IncrementalCommonSharesAttributableToShareBasedPaymentArrangements
|
1174000 | |
| CY2016 | us-gaap |
Incremental Common Shares Attributable To Share Based Payment Arrangements
IncrementalCommonSharesAttributableToShareBasedPaymentArrangements
|
894000 | |
| CY2015 | us-gaap |
Incremental Common Shares Attributable To Share Based Payment Arrangements
IncrementalCommonSharesAttributableToShareBasedPaymentArrangements
|
947000 | |
| CY2015Q4 | us-gaap |
Line Of Credit Facility Current Borrowing Capacity
LineOfCreditFacilityCurrentBorrowingCapacity
|
100000000 | |
| CY2017Q4 | us-gaap |
Line Of Credit
LineOfCredit
|
900000 | |
| CY2015Q4 | mktx |
Line Of Credit Facility Additional Borrowing Capacity
LineOfCreditFacilityAdditionalBorrowingCapacity
|
50000000 | |
| CY2017Q4 | us-gaap |
Line Of Credit Facility Remaining Borrowing Capacity
LineOfCreditFacilityRemainingBorrowingCapacity
|
99100000 | |
| CY2015Q4 | us-gaap |
Line Of Credit Facility Expiration Period
LineOfCreditFacilityExpirationPeriod
|
P2Y | |
| CY2017 | mktx |
Percentage Of Foreign Subsidiary Interest Pledged
PercentageOfForeignSubsidiaryInterestPledged
|
0.65 | |
| CY2017 | mktx |
Operating Leases Expiration Date
OperatingLeasesExpirationDate
|
2033-12-31 | |
| CY2017Q4 | us-gaap |
Operating Leases Future Minimum Payments Due Current
OperatingLeasesFutureMinimumPaymentsDueCurrent
|
5000000 | |
| CY2017Q4 | us-gaap |
Operating Leases Future Minimum Payments Due In Two Years
OperatingLeasesFutureMinimumPaymentsDueInTwoYears
|
9659000 | |
| CY2017Q4 | us-gaap |
Operating Leases Future Minimum Payments Due In Three Years
OperatingLeasesFutureMinimumPaymentsDueInThreeYears
|
10770000 | |
| CY2017Q4 | us-gaap |
Operating Leases Future Minimum Payments Due In Four Years
OperatingLeasesFutureMinimumPaymentsDueInFourYears
|
10149000 | |
| CY2017Q4 | us-gaap |
Operating Leases Future Minimum Payments Due In Five Years
OperatingLeasesFutureMinimumPaymentsDueInFiveYears
|
9129000 | |
| CY2017Q4 | us-gaap |
Operating Leases Future Minimum Payments Due Thereafter
OperatingLeasesFutureMinimumPaymentsDueThereafter
|
99166000 | |
| CY2017Q4 | us-gaap |
Operating Leases Future Minimum Payments Due
OperatingLeasesFutureMinimumPaymentsDue
|
143873000 | |
| CY2017 | us-gaap |
Operating Leases Rent Expense Net
OperatingLeasesRentExpenseNet
|
5300000 | |
| CY2016 | us-gaap |
Operating Leases Rent Expense Net
OperatingLeasesRentExpenseNet
|
4000000 | |
| CY2015 | us-gaap |
Operating Leases Rent Expense Net
OperatingLeasesRentExpenseNet
|
4100000 | |
| CY2017 | mktx |
Number Of Subsidiaries
NumberOfSubsidiaries
|
2 | |
| CY2017 | mktx |
Settlement Period Of Bond Transaction
SettlementPeriodOfBondTransaction
|
Within one to two trading days | |
| CY2015 | us-gaap |
Principal Transactions Revenue
PrincipalTransactionsRevenue
|
16900000 | |
| CY2017Q4 | us-gaap |
Deposits Assets
DepositsAssets
|
1200000 | |
| CY2016Q4 | us-gaap |
Deposits Assets
DepositsAssets
|
1100000 | |
| CY2017 | us-gaap |
Number Of Operating Segments
NumberOfOperatingSegments
|
1 | |
| CY2017 | us-gaap |
Defined Contribution Plan Employer Discretionary Contribution Amount
DefinedContributionPlanEmployerDiscretionaryContributionAmount
|
1800000 | |
| CY2017 | mktx |
Non Qualified Deferred Cash Incentive Plan Maximum Eligibility Percentage Of Employees
NonQualifiedDeferredCashIncentivePlanMaximumEligibilityPercentageOfEmployees
|
1.00 | |
| CY2017Q4 | mktx |
Mutual Fund Investments And Deferred Compensation Obligation At Fair Value
MutualFundInvestmentsAndDeferredCompensationObligationAtFairValue
|
3200000 | |
| CY2016 | mktx |
Deferred Compensation Arrangement Trading Gain And Compensation Expense
DeferredCompensationArrangementTradingGainAndCompensationExpense
|
200000 | |
| CY2015 | mktx |
Deferred Compensation Arrangement Trading Gain And Compensation Expense
DeferredCompensationArrangementTradingGainAndCompensationExpense
|
0 | |
| CY2016 | mktx |
Concentration Risk Number Of Customer
ConcentrationRiskNumberOfCustomer
|
0 | |
| CY2015 | mktx |
Concentration Risk Number Of Customer
ConcentrationRiskNumberOfCustomer
|
0 | |
| CY2017 | mktx |
Percentage Of Outstanding Shares Owned By Single Client
PercentageOfOutstandingSharesOwnedBySingleClient
|
0.083 |
