3.19.1 html 290 386 1 false 84 0 false 7 false false R1.htm 0001000 - Document - Document And Entity Information Sheet http://www.inwk.com/role/DocumentAndEntityInformation Document And Entity Information Cover 1 false false R2.htm 1001000 - Statement - Consolidated Statements of Operations Sheet http://www.inwk.com/role/ConsolidatedStatementsOfOperations Consolidated Statements of Operations Statements 2 false false R3.htm 1002000 - Statement - Consolidated Statements of Comprehensive Income (Loss) Sheet http://www.inwk.com/role/ConsolidatedStatementsOfComprehensiveIncomeLoss Consolidated Statements of Comprehensive Income (Loss) Statements 3 false false R4.htm 1003000 - Statement - Consolidated Balance Sheets Sheet http://www.inwk.com/role/ConsolidatedBalanceSheets Consolidated Balance Sheets Statements 4 false false R5.htm 1003501 - Statement - Consolidated Balance Sheets [Parenthetical] Sheet http://www.inwk.com/role/ConsolidatedBalanceSheetsParenthetical Consolidated Balance Sheets [Parenthetical] Statements 5 false false R6.htm 1004000 - Statement - Consolidated Statements of Stockholders' Equity Sheet http://www.inwk.com/role/ConsolidatedStatementsOfStockholdersEquity Consolidated Statements of Stockholders' Equity Statements 6 false false R7.htm 1005000 - Statement - Consolidated Statements of Cash Flows Sheet http://www.inwk.com/role/ConsolidatedStatementsOfCashFlows Consolidated Statements of Cash Flows Statements 7 false false R8.htm 2101100 - Disclosure - Description of the Business Sheet http://www.inwk.com/role/DescriptionOfBusiness Description of the Business Notes 8 false false R9.htm 2102100 - Disclosure - Summary of Significant Accounting Policies Sheet http://www.inwk.com/role/SummaryOfSignificantAccountingPolicies Summary of Significant Accounting Policies Notes 9 false false R10.htm 2103100 - Disclosure - Revenue Recognition Sheet http://www.inwk.com/role/RevenueRecognition Revenue Recognition Notes 10 false false R11.htm 2104100 - Disclosure - Acquisitions Sheet http://www.inwk.com/role/Acquisitions Acquisitions Notes 11 false false R12.htm 2105100 - Disclosure - Goodwill Sheet http://www.inwk.com/role/Goodwill Goodwill Notes 12 false false R13.htm 2106100 - Disclosure - Other Intangible Assets Sheet http://www.inwk.com/role/OtherIntangibleAssets Other Intangible Assets Notes 13 false false R14.htm 2107100 - Disclosure - Restructuring Activities and Other Charges Sheet http://www.inwk.com/role/RestructuringActivitiesAndOtherCharges Restructuring Activities and Other Charges Notes 14 false false R15.htm 2108100 - Disclosure - Property and Equipment Sheet http://www.inwk.com/role/PropertyAndEquipment Property and Equipment Notes 15 false false R16.htm 2109100 - Disclosure - Revolving Credit Facility Sheet http://www.inwk.com/role/RevolvingCreditFacility Revolving Credit Facility Notes 16 false false R17.htm 2111100 - Disclosure - Commitments and Contingencies Sheet http://www.inwk.com/role/CommitmentsAndContingencies Commitments and Contingencies Notes 17 false false R18.htm 2112100 - Disclosure - Income Taxes Sheet http://www.inwk.com/role/IncomeTaxes Income Taxes Notes 18 false false R19.htm 2113100 - Disclosure - Fair Value Measurement Sheet http://www.inwk.com/role/FairValueMeasurement Fair Value Measurement Notes 19 false false R20.htm 2114100 - Disclosure - Earnings Per Share Sheet http://www.inwk.com/role/EarningsPerShare Earnings Per Share Notes 20 false false R21.htm 2115100 - Disclosure - Share Repurchase Program Sheet http://www.inwk.com/role/ShareRepurchaseProgram Share Repurchase Program Notes 21 false false R22.htm 2116100 - Disclosure - Stock-Based Compensation Plans Sheet http://www.inwk.com/role/StockBasedCompensationPlans Stock-Based Compensation Plans Notes 22 false false R23.htm 2117100 - Disclosure - Benefit Plans Sheet http://www.inwk.com/role/BenefitPlans Benefit Plans Notes 23 false false R24.htm 2118100 - Disclosure - Related Party Transactions Sheet http://www.inwk.com/role/RelatedPartyTransactions Related Party Transactions Notes 24 false false R25.htm 2120100 - Disclosure - Supplemental Cash Flow Information Sheet http://www.inwk.com/role/SupplementalCashFlowInformation Supplemental Cash Flow Information Notes 25 false false R26.htm 2122100 - Disclosure - Business Segments Sheet http://www.inwk.com/role/BusinessSegments Business Segments Notes 26 false false R27.htm 2125100 - Disclosure - Quarterly Financial Data (Unaudited) (Notes) Notes http://www.inwk.com/role/QuarterlyFinancialDataUnauditedNotes Quarterly Financial Data (Unaudited) (Notes) Notes 27 false false R28.htm 2126100 - Disclosure - SCHEDULE II-VALUATION AND QUALIFYING ACCOUNTS Sheet http://www.inwk.com/role/ScheduleIiValuationAndQualifyingAccounts SCHEDULE II-VALUATION AND QUALIFYING ACCOUNTS Notes 28 false false R29.htm 2127100 - Disclosure - Subsequent Events (Notes) Notes http://www.inwk.com/role/SubsequentEventsNotes Subsequent Events (Notes) Notes 29 false false R30.htm 2202201 - Disclosure - Summary of Significant Accounting Policies (Policies) Sheet http://www.inwk.com/role/SummaryOfSignificantAccountingPoliciesPolicies Summary of Significant Accounting Policies (Policies) Policies http://www.inwk.com/role/SummaryOfSignificantAccountingPolicies 30 false false R31.htm 2302302 - Disclosure - Summary of Significant Accounting Policies (Tables) Sheet http://www.inwk.com/role/SummaryOfSignificantAccountingPoliciesTables Summary of Significant Accounting Policies (Tables) Tables http://www.inwk.com/role/SummaryOfSignificantAccountingPolicies 31 false false R32.htm 2303301 - Disclosure - Revenue Recognition (Tables) Sheet http://www.inwk.com/role/RevenueRecognitionTables Revenue Recognition (Tables) Tables http://www.inwk.com/role/RevenueRecognition 32 false false R33.htm 2304301 - Disclosure - Acquisitions (Tables) Sheet http://www.inwk.com/role/AcquisitionsTables Acquisitions (Tables) Tables http://www.inwk.com/role/Acquisitions 33 false false R34.htm 2305301 - Disclosure - Goodwill (Tables) Sheet http://www.inwk.com/role/GoodwillTables Goodwill (Tables) Tables http://www.inwk.com/role/Goodwill 34 false false R35.htm 2306301 - Disclosure - Other Intangible Assets (Tables) Sheet http://www.inwk.com/role/OtherIntangibleAssetsTables Other Intangible Assets (Tables) Tables http://www.inwk.com/role/OtherIntangibleAssets 35 false false R36.htm 2307301 - Disclosure - Restructuring Activities and Other Charges (Tables) Sheet http://www.inwk.com/role/RestructuringActivitiesAndOtherChargesTables Restructuring Activities and Other Charges (Tables) Tables http://www.inwk.com/role/RestructuringActivitiesAndOtherCharges 36 false false R37.htm 2308301 - Disclosure - Property and Equipment (Tables) Sheet http://www.inwk.com/role/PropertyAndEquipmentTables Property and Equipment (Tables) Tables http://www.inwk.com/role/PropertyAndEquipment 37 false false R38.htm 2311301 - Disclosure - Commitments and Contingencies (Tables) Sheet http://www.inwk.com/role/CommitmentsAndContingenciesTables Commitments and Contingencies (Tables) Tables http://www.inwk.com/role/CommitmentsAndContingencies 38 false false R39.htm 2312301 - Disclosure - Income Taxes (Tables) Sheet http://www.inwk.com/role/IncomeTaxesTables Income Taxes (Tables) Tables http://www.inwk.com/role/IncomeTaxes 39 false false R40.htm 2314301 - Disclosure - Earnings Per Share (Tables) Sheet http://www.inwk.com/role/EarningsPerShareTables Earnings Per Share (Tables) Tables http://www.inwk.com/role/EarningsPerShare 40 false false R41.htm 2316301 - Disclosure - Stock-Based Compensation Plans (Tables) Sheet http://www.inwk.com/role/StockBasedCompensationPlansTables Stock-Based Compensation Plans (Tables) Tables http://www.inwk.com/role/StockBasedCompensationPlans 41 false false R42.htm 2320301 - Disclosure - Supplemental Cash Flow Information (Tables) Sheet http://www.inwk.com/role/SupplementalCashFlowInformationTables Supplemental Cash Flow Information (Tables) Tables http://www.inwk.com/role/SupplementalCashFlowInformation 42 false false R43.htm 2322301 - Disclosure - Business Segments (Tables) Sheet http://www.inwk.com/role/BusinessSegmentsTables Business Segments (Tables) Tables http://www.inwk.com/role/BusinessSegments 43 false false R44.htm 2401401 - Disclosure - Description of the Business - Narrative (Details) Sheet http://www.inwk.com/role/DescriptionOfBusinessNarrativeDetails Description of the Business - Narrative (Details) Details 44 false false R45.htm 2402403 - Disclosure - - Summary of Property and Equipment (Details) Sheet http://www.inwk.com/role/SummaryOfPropertyAndEquipmentDetails - Summary of Property and Equipment (Details) Details 45 false false R46.htm 2402404 - Disclosure - Summary of Significant Accounting Policies - Schedule of AOCI (Details) Sheet http://www.inwk.com/role/SummaryOfSignificantAccountingPoliciesScheduleOfAociDetails Summary of Significant Accounting Policies - Schedule of AOCI (Details) Details 46 false false R47.htm 2402405 - Disclosure - Summary of Significant Accounting Policies - Narrative (Details) Sheet http://www.inwk.com/role/SummaryOfSignificantAccountingPoliciesNarrativeDetails Summary of Significant Accounting Policies - Narrative (Details) Details 47 false false R48.htm 2403402 - Disclosure - Revenue Recognition - Condensed Consolidated Balance Sheet (Details) Sheet http://www.inwk.com/role/RevenueRecognitionCondensedConsolidatedBalanceSheetDetails Revenue Recognition - Condensed Consolidated Balance Sheet (Details) Details 48 false false R49.htm 2403403 - Disclosure - Revenue Recognition - Condensed Consolidated Statement of Operations (Details) Sheet http://www.inwk.com/role/RevenueRecognitionCondensedConsolidatedStatementOfOperationsDetails Revenue Recognition - Condensed Consolidated Statement of Operations (Details) Details 49 false false R50.htm 2403404 - Disclosure - Revenue Recognition - Narrative (Details) Sheet http://www.inwk.com/role/RevenueRecognitionNarrativeDetails Revenue Recognition - Narrative (Details) Details 50 false false R51.htm 2404402 - Disclosure - Acquisitions - Schedule of Potential Contingent Consideration (Details) Sheet http://www.inwk.com/role/AcquisitionsScheduleOfPotentialContingentConsiderationDetails Acquisitions - Schedule of Potential Contingent Consideration (Details) Details 51 false false R52.htm 2404403 - Disclosure - Acquisitions - Schedule of Equity Issued for Acquisition (Details) Sheet http://www.inwk.com/role/AcquisitionsScheduleOfEquityIssuedForAcquisitionDetails Acquisitions - Schedule of Equity Issued for Acquisition (Details) Details 52 false false R53.htm 2404404 - Disclosure - Acquisitions - Narrative (Details) Sheet http://www.inwk.com/role/AcquisitionsNarrativeDetails Acquisitions - Narrative (Details) Details 53 false false R54.htm 2405402 - Disclosure - Goodwill - Schedule of Goodwill (Details) Sheet http://www.inwk.com/role/GoodwillScheduleOfGoodwillDetails Goodwill - Schedule of Goodwill (Details) Details 54 false false R55.htm 2405403 - Disclosure - Goodwill - Narrative (Details) Sheet http://www.inwk.com/role/GoodwillNarrativeDetails Goodwill - Narrative (Details) Details 55 false false R56.htm 2406402 - Disclosure - Other Intangible Assets - Schedule of Intangible Assets (Details) Sheet http://www.inwk.com/role/OtherIntangibleAssetsScheduleOfIntangibleAssetsDetails Other Intangible Assets - Schedule of Intangible Assets (Details) Details 56 false false R57.htm 2406403 - Disclosure - Other Intangible Assets - Schedule of Future Amortization Expense (Details) Sheet http://www.inwk.com/role/OtherIntangibleAssetsScheduleOfFutureAmortizationExpenseDetails Other Intangible Assets - Schedule of Future Amortization Expense (Details) Details 57 false false R58.htm 2406404 - Disclosure - Other Intangible Assets - Narrative (Details) Sheet http://www.inwk.com/role/OtherIntangibleAssetsNarrativeDetails Other Intangible Assets - Narrative (Details) Details 58 false false R59.htm 2407402 - Disclosure - Restructuring Activities and Other Charges - Schedule of Restructuring Charges (Details) Sheet http://www.inwk.com/role/RestructuringActivitiesAndOtherChargesScheduleOfRestructuringChargesDetails Restructuring Activities and Other Charges - Schedule of Restructuring Charges (Details) Details 59 false false R60.htm 2407403 - Disclosure - Restructuring Activities and Other Charges - Narrative (Details) Sheet http://www.inwk.com/role/RestructuringActivitiesAndOtherChargesNarrativeDetails Restructuring Activities and Other Charges - Narrative (Details) Details 60 false false R61.htm 2408402 - Disclosure - Property and Equipment - Schedule of Property and Equipment (Details) Sheet http://www.inwk.com/role/PropertyAndEquipmentScheduleOfPropertyAndEquipmentDetails Property and Equipment - Schedule of Property and Equipment (Details) Details 61 false false R62.htm 2408403 - Disclosure - Property and Equipment - Narrative (Details) Sheet http://www.inwk.com/role/PropertyAndEquipmentNarrativeDetails Property and Equipment - Narrative (Details) Details 62 false false R63.htm 2409401 - Disclosure - Revolving Credit Facility - Narrative (Details) Sheet http://www.inwk.com/role/RevolvingCreditFacilityNarrativeDetails Revolving Credit Facility - Narrative (Details) Details 63 false false R64.htm 2411402 - Disclosure - Commitments and Contingencies - Schedule of Future Lease Payments (Details) Sheet http://www.inwk.com/role/CommitmentsAndContingenciesScheduleOfFutureLeasePaymentsDetails Commitments and Contingencies - Schedule of Future Lease Payments (Details) Details 64 false false R65.htm 2411403 - Disclosure - Commitments and Contingencies - Narrative (Details) Sheet http://www.inwk.com/role/CommitmentsAndContingenciesNarrativeDetails Commitments and Contingencies - Narrative (Details) Details 65 false false R66.htm 2412402 - Disclosure - Income Taxes - Components of Income Taxes (Details) Sheet http://www.inwk.com/role/IncomeTaxesComponentsOfIncomeTaxesDetails Income Taxes - Components of Income Taxes (Details) Details 66 false false R67.htm 2412403 - Disclosure - Income Taxes - Effective Income Tax Reconciliation (Details) Sheet http://www.inwk.com/role/IncomeTaxesEffectiveIncomeTaxReconciliationDetails Income Taxes - Effective Income Tax Reconciliation (Details) Details 67 false false R68.htm 2412404 - Disclosure - Income Taxes - Schedule of Deferred Tax Assets and Liabilities (Details) Sheet http://www.inwk.com/role/IncomeTaxesScheduleOfDeferredTaxAssetsAndLiabilitiesDetails Income Taxes - Schedule of Deferred Tax Assets and Liabilities (Details) Details 68 false false R69.htm 2412405 - Disclosure - Income Taxes - Narrative (Details) Sheet http://www.inwk.com/role/IncomeTaxesNarrativeDetails Income Taxes - Narrative (Details) Details 69 false false R70.htm 2412406 - Disclosure - Income Taxes Uncertain Tax Positions (Details) Sheet http://www.inwk.com/role/IncomeTaxesUncertainTaxPositionsDetails Income Taxes Uncertain Tax Positions (Details) Details 70 false false R71.htm 2413403 - Disclosure - Fair Value Measurement - Rollforward of Unobservable Reconciliations (Details) Sheet http://www.inwk.com/role/FairValueMeasurementRollforwardOfUnobservableReconciliationsDetails Fair Value Measurement - Rollforward of Unobservable Reconciliations (Details) Details 71 false false R72.htm 2413404 - Disclosure - Fair Value Measurement - Narrative (Details) Sheet http://www.inwk.com/role/FairValueMeasurementNarrativeDetails Fair Value Measurement - Narrative (Details) Details 72 false false R73.htm 2414402 - Disclosure - Earnings Per Share - Schedule of Earnings Per Share (Details) Sheet http://www.inwk.com/role/EarningsPerShareScheduleOfEarningsPerShareDetails Earnings Per Share - Schedule of Earnings Per Share (Details) Details 73 false false R74.htm 2414403 - Disclosure - Earnings Per Share - Narrative (Details) Sheet http://www.inwk.com/role/EarningsPerShareNarrativeDetails Earnings Per Share - Narrative (Details) Details 74 false false R75.htm 2415401 - Disclosure - Share Repurchase Program - Narrative (Details) Sheet http://www.inwk.com/role/ShareRepurchaseProgramNarrativeDetails Share Repurchase Program - Narrative (Details) Details 75 false false R76.htm 2416402 - Disclosure - Stock-Based Compensation Plans - Option Activity (Details) Sheet http://www.inwk.com/role/StockBasedCompensationPlansOptionActivityDetails Stock-Based Compensation Plans - Option Activity (Details) Details 76 false false R77.htm 2416403 - Disclosure - Stock-Based Compensation Plans - Weighted Average Fair Value of Options Granted (Details) Sheet http://www.inwk.com/role/StockBasedCompensationPlansWeightedAverageFairValueOfOptionsGrantedDetails Stock-Based Compensation Plans - Weighted Average Fair Value of Options Granted (Details) Details 77 false false R78.htm 2416404 - Disclosure - Stock-Based Compensation Plans - Option Assumptions (Details) Sheet http://www.inwk.com/role/StockBasedCompensationPlansOptionAssumptionsDetails Stock-Based Compensation Plans - Option Assumptions (Details) Details 78 false false R79.htm 2416405 - Disclosure - Stock-Based Compensation Plans - Schedule of Exercise Price Ranges (Details) Sheet http://www.inwk.com/role/StockBasedCompensationPlansScheduleOfExercisePriceRangesDetails Stock-Based Compensation Plans - Schedule of Exercise Price Ranges (Details) Details 79 false false R80.htm 2416406 - Disclosure - Stock-Based Compensation Plans - Restricted Stock Awards and Performance-Based Restricted Stock Units (Details) Sheet http://www.inwk.com/role/StockBasedCompensationPlansRestrictedStockAwardsAndPerformanceBasedRestrictedStockUnitsDetails Stock-Based Compensation Plans - Restricted Stock Awards and Performance-Based Restricted Stock Units (Details) Details 80 false false R81.htm 2416407 - Disclosure - Stock-Based Compensation Plans - Narrative (Details) Sheet http://www.inwk.com/role/StockBasedCompensationPlansNarrativeDetails Stock-Based Compensation Plans - Narrative (Details) Details 81 false false R82.htm 2416408 - Disclosure - Stock-Based Compensation Plans - Restricted Share Units (Details) Sheet http://www.inwk.com/role/StockBasedCompensationPlansRestrictedShareUnitsDetails Stock-Based Compensation Plans - Restricted Share Units (Details) Details 82 false false R83.htm 2417401 - Disclosure - Benefit Plans (Details Textual) Sheet http://www.inwk.com/role/BenefitPlansDetailsTextual Benefit Plans (Details Textual) Details http://www.inwk.com/role/BenefitPlans 83 false false R84.htm 2418401 - Disclosure - Related Party Transactions - Narrative (Details) Sheet http://www.inwk.com/role/RelatedPartyTransactionsNarrativeDetails Related Party Transactions - Narrative (Details) Details 84 false false R85.htm 2420402 - Disclosure - Supplemental Cash Flow Information (Details) Sheet http://www.inwk.com/role/SupplementalCashFlowInformationDetails Supplemental Cash Flow Information (Details) Details http://www.inwk.com/role/SupplementalCashFlowInformationTables 85 false false R86.htm 2422402 - Disclosure - Business Segments - Revenue by Geographic Area (Details) Sheet http://www.inwk.com/role/BusinessSegmentsRevenueByGeographicAreaDetails Business Segments - Revenue by Geographic Area (Details) Details 86 false false R87.htm 2422403 - Disclosure - Business Segments - EBITDA and Adjusted EBITDA (Details) Sheet http://www.inwk.com/role/BusinessSegmentsEbitdaAndAdjustedEbitdaDetails Business Segments - EBITDA and Adjusted EBITDA (Details) Details 87 false false R88.htm 2422404 - Disclosure - Business Segments - Narrative (Details) Sheet http://www.inwk.com/role/BusinessSegmentsNarrativeDetails Business Segments - Narrative (Details) Details 88 false false R89.htm 2422405 - Disclosure - Business Segments - Assets by Geographic Area (Details) Sheet http://www.inwk.com/role/BusinessSegmentsAssetsByGeographicAreaDetails Business Segments - Assets by Geographic Area (Details) Details 89 false false R90.htm 2425402 - Disclosure - Quarterly Financial Data (Unaudited) (Details) Sheet http://www.inwk.com/role/QuarterlyFinancialDataUnauditedDetails Quarterly Financial Data (Unaudited) (Details) Details http://www.inwk.com/role/QuarterlyFinancialDataUnauditedNotes 90 false false R91.htm 2426401 - Disclosure - SCHEDULE II-VALUATION AND QUALIFYING ACCOUNTS (Details) Sheet http://www.inwk.com/role/ScheduleIiValuationAndQualifyingAccountsDetails SCHEDULE II-VALUATION AND QUALIFYING ACCOUNTS (Details) Details http://www.inwk.com/role/ScheduleIiValuationAndQualifyingAccounts 91 false false All Reports Book All Reports inwk-20181231.xml inwk-20181231.xsd inwk-20181231_cal.xml inwk-20181231_def.xml inwk-20181231_lab.xml inwk-20181231_pre.xml http://xbrl.sec.gov/currency/2017-01-31 http://xbrl.sec.gov/dei/2018-01-31 http://xbrl.sec.gov/country/2017-01-31 http://xbrl.sec.gov/exch/2018-01-31 http://fasb.org/us-gaap/2018-01-31 http://fasb.org/srt/2018-01-31 true true