3.3.1.900 html 342 534 1 true 105 0 false 13 false false R1.htm 0001000 - Document - Document and Entity Information Sheet http://www.cumulus.com/role/DocumentAndEntityInformation Document and Entity Information Cover 1 false false R2.htm 1001000 - Statement - Consolidated Balance Sheets Sheet http://www.cumulus.com/role/ConsolidatedBalanceSheets Consolidated Balance Sheets Statements 2 false false R3.htm 1001501 - Statement - Consolidated Balance Sheets (Parenthetical) Sheet http://www.cumulus.com/role/ConsolidatedBalanceSheetsParenthetical Consolidated Balance Sheets (Parenthetical) Statements 3 false false R4.htm 1002000 - Statement - Consolidated Statements Of Operations Sheet http://www.cumulus.com/role/ConsolidatedStatementsOfOperations Consolidated Statements Of Operations Statements 4 false false R5.htm 1002501 - Statement - Consolidated Statements Of Operations (Parenthetical) Sheet http://www.cumulus.com/role/ConsolidatedStatementsOfOperationsParenthetical Consolidated Statements Of Operations (Parenthetical) Statements 5 false false R6.htm 1003000 - Statement - Consolidated Statements Of Stockholders' Equity Sheet http://www.cumulus.com/role/ConsolidatedStatementsOfStockholdersEquity Consolidated Statements Of Stockholders' Equity Statements 6 false false R7.htm 1004000 - Statement - Consolidated Statements Of Cash Flows Sheet http://www.cumulus.com/role/ConsolidatedStatementsOfCashFlows Consolidated Statements Of Cash Flows Statements 7 false false R8.htm 2101100 - Disclosure - Description of Business, Basis of Presentation and Summary of Significant Accounting Policies Sheet http://www.cumulus.com/role/DescriptionOfBusinessBasisOfPresentationAndSummaryOfSignificantAccountingPolicies Description of Business, Basis of Presentation and Summary of Significant Accounting Policies Notes 8 false false R9.htm 2102100 - Disclosure - Acquisitions and Dispositions Sheet http://www.cumulus.com/role/AcquisitionsAndDispositions Acquisitions and Dispositions Notes 9 false false R10.htm 2103100 - Disclosure - Discontinued Operations Sheet http://www.cumulus.com/role/DiscontinuedOperations Discontinued Operations Notes 10 false false R11.htm 2104100 - Disclosure - Restricted Cash Sheet http://www.cumulus.com/role/RestrictedCash Restricted Cash Notes 11 false false R12.htm 2105100 - Disclosure - Property and Equipment Sheet http://www.cumulus.com/role/PropertyAndEquipment Property and Equipment Notes 12 false false R13.htm 2106100 - Disclosure - Intangible Assets and Goodwill Sheet http://www.cumulus.com/role/IntangibleAssetsAndGoodwill Intangible Assets and Goodwill Notes 13 false false R14.htm 2107100 - Disclosure - Accounts Payable and Accrued Expenses Sheet http://www.cumulus.com/role/AccountsPayableAndAccruedExpenses Accounts Payable and Accrued Expenses Notes 14 false false R15.htm 2108100 - Disclosure - Long-Term Debt Sheet http://www.cumulus.com/role/LongTermDebt Long-Term Debt Notes 15 false false R16.htm 2109100 - Disclosure - Fair Value Measurements Sheet http://www.cumulus.com/role/FairValueMeasurements Fair Value Measurements Notes 16 false false R17.htm 2110100 - Disclosure - Stockholders' Equity Sheet http://www.cumulus.com/role/StockholdersEquity Stockholders' Equity Notes 17 false false R18.htm 2111100 - Disclosure - Redeemable Preferred Stock Sheet http://www.cumulus.com/role/RedeemablePreferredStock Redeemable Preferred Stock Notes 18 false false R19.htm 2112100 - Disclosure - Stock-Based Compensation Expense Sheet http://www.cumulus.com/role/StockBasedCompensationExpense Stock-Based Compensation Expense Notes 19 false false R20.htm 2113100 - Disclosure - Income Taxes Sheet http://www.cumulus.com/role/IncomeTaxes Income Taxes Notes 20 false false R21.htm 2114100 - Disclosure - (Loss) Earnings Per Share ("EPS") Sheet http://www.cumulus.com/role/LossEarningsPerShareEps (Loss) Earnings Per Share ("EPS") Notes 21 false false R22.htm 2115100 - Disclosure - Leases Sheet http://www.cumulus.com/role/Leases Leases Notes 22 false false R23.htm 2116100 - Disclosure - Commitments and Contingencies Sheet http://www.cumulus.com/role/CommitmentsAndContingencies Commitments and Contingencies Notes 23 false false R24.htm 2117100 - Disclosure - Quarterly Results (Unaudited) Sheet http://www.cumulus.com/role/QuarterlyResultsUnaudited Quarterly Results (Unaudited) Notes 24 false false R25.htm 2118100 - Disclosure - Supplemental Condensed Consolidating Financial Information Sheet http://www.cumulus.com/role/SupplementalCondensedConsolidatingFinancialInformation Supplemental Condensed Consolidating Financial Information Notes 25 false false R26.htm 2119100 - Disclosure - Subsequent Event Sheet http://www.cumulus.com/role/SubsequentEvent Subsequent Event Notes 26 false false R27.htm 2120100 - Disclosure - SCHEDULE II - VALUATION AND QUALIFYING ACCOUNTS Sheet http://www.cumulus.com/role/ScheduleIiValuationAndQualifyingAccounts SCHEDULE II - VALUATION AND QUALIFYING ACCOUNTS Notes 27 false false R28.htm 2201201 - Disclosure - Description of Business, Basis of Presentation and Summary of Significant Accounting Policies (Policies) Sheet http://www.cumulus.com/role/DescriptionOfBusinessBasisOfPresentationAndSummaryOfSignificantAccountingPoliciesPolicies Description of Business, Basis of Presentation and Summary of Significant Accounting Policies (Policies) Policies http://www.cumulus.com/role/DescriptionOfBusinessBasisOfPresentationAndSummaryOfSignificantAccountingPolicies 28 false false R29.htm 2302301 - Disclosure - Acquisitions and Dispositions (Tables) Sheet http://www.cumulus.com/role/AcquisitionsAndDispositionsTables Acquisitions and Dispositions (Tables) Tables http://www.cumulus.com/role/AcquisitionsAndDispositions 29 false false R30.htm 2303301 - Disclosure - Discontinued Operations (Tables) Sheet http://www.cumulus.com/role/DiscontinuedOperationsTables Discontinued Operations (Tables) Tables http://www.cumulus.com/role/DiscontinuedOperations 30 false false R31.htm 2305301 - Disclosure - Property and Equipment (Tables) Sheet http://www.cumulus.com/role/PropertyAndEquipmentTables Property and Equipment (Tables) Tables http://www.cumulus.com/role/PropertyAndEquipment 31 false false R32.htm 2306301 - Disclosure - Intangible Assets and Goodwill (Tables) Sheet http://www.cumulus.com/role/IntangibleAssetsAndGoodwillTables Intangible Assets and Goodwill (Tables) Tables http://www.cumulus.com/role/IntangibleAssetsAndGoodwill 32 false false R33.htm 2307301 - Disclosure - Accounts Payable and Accrued Expenses (Tables) Sheet http://www.cumulus.com/role/AccountsPayableAndAccruedExpensesTables Accounts Payable and Accrued Expenses (Tables) Tables http://www.cumulus.com/role/AccountsPayableAndAccruedExpenses 33 false false R34.htm 2308301 - Disclosure - Long-Term Debt (Tables) Sheet http://www.cumulus.com/role/LongTermDebtTables Long-Term Debt (Tables) Tables http://www.cumulus.com/role/LongTermDebt 34 false false R35.htm 2309301 - Disclosure - Fair Value Measurements (Tables) Sheet http://www.cumulus.com/role/FairValueMeasurementsTables Fair Value Measurements (Tables) Tables http://www.cumulus.com/role/FairValueMeasurements 35 false false R36.htm 2312301 - Disclosure - Stock-Based Compensation Expense (Tables) Sheet http://www.cumulus.com/role/StockBasedCompensationExpenseTables Stock-Based Compensation Expense (Tables) Tables http://www.cumulus.com/role/StockBasedCompensationExpense 36 false false R37.htm 2313301 - Disclosure - Income Taxes (Tables) Sheet http://www.cumulus.com/role/IncomeTaxesTables Income Taxes (Tables) Tables http://www.cumulus.com/role/IncomeTaxes 37 false false R38.htm 2314301 - Disclosure - (Loss) Earnings Per Share ("EPS") (Tables) Sheet http://www.cumulus.com/role/LossEarningsPerShareEpsTables (Loss) Earnings Per Share ("EPS") (Tables) Tables http://www.cumulus.com/role/LossEarningsPerShareEps 38 false false R39.htm 2315301 - Disclosure - Leases (Tables) Sheet http://www.cumulus.com/role/LeasesTables Leases (Tables) Tables http://www.cumulus.com/role/Leases 39 false false R40.htm 2317301 - Disclosure - Quarterly Results (Unaudited) (Tables) Sheet http://www.cumulus.com/role/QuarterlyResultsUnauditedTables Quarterly Results (Unaudited) (Tables) Tables http://www.cumulus.com/role/QuarterlyResultsUnaudited 40 false false R41.htm 2318301 - Disclosure - Supplemental Condensed Consolidating Financial Information (Tables) Sheet http://www.cumulus.com/role/SupplementalCondensedConsolidatingFinancialInformationTables Supplemental Condensed Consolidating Financial Information (Tables) Tables http://www.cumulus.com/role/SupplementalCondensedConsolidatingFinancialInformation 41 false false R42.htm 2401402 - Disclosure - Description of Business, Basis of Presentation and Summary of Significant Accounting Policies - Additional Information (Detail) Sheet http://www.cumulus.com/role/DescriptionOfBusinessBasisOfPresentationAndSummaryOfSignificantAccountingPoliciesAdditionalInformationDetail Description of Business, Basis of Presentation and Summary of Significant Accounting Policies - Additional Information (Detail) Details 42 false false R43.htm 2402402 - Disclosure - Acquisitions and Dispositions - Additional Information (Detail) Sheet http://www.cumulus.com/role/AcquisitionsAndDispositionsAdditionalInformationDetail Acquisitions and Dispositions - Additional Information (Detail) Details 43 false false R44.htm 2402403 - Disclosure - Summary of Preliminary Purchase Price Allocation (Detail) Sheet http://www.cumulus.com/role/SummaryOfPreliminaryPurchasePriceAllocationDetail Summary of Preliminary Purchase Price Allocation (Detail) Details 44 false false R45.htm 2402404 - Disclosure - Summary of Intangible Assets Acquired (Detail) Sheet http://www.cumulus.com/role/SummaryOfIntangibleAssetsAcquiredDetail Summary of Intangible Assets Acquired (Detail) Details 45 false false R46.htm 2403402 - Disclosure - Discontinued Operations - Additional Information (Detail) Sheet http://www.cumulus.com/role/DiscontinuedOperationsAdditionalInformationDetail Discontinued Operations - Additional Information (Detail) Details 46 false false R47.htm 2403403 - Disclosure - Income from Discontinued Operations (Detail) Sheet http://www.cumulus.com/role/IncomeFromDiscontinuedOperationsDetail Income from Discontinued Operations (Detail) Details 47 false false R48.htm 2404401 - Disclosure - Restricted Cash - Additional Information (Detail) Sheet http://www.cumulus.com/role/RestrictedCashAdditionalInformationDetail Restricted Cash - Additional Information (Detail) Details 48 false false R49.htm 2405402 - Disclosure - Components of Property and Equipment (Detail) Sheet http://www.cumulus.com/role/ComponentsOfPropertyAndEquipmentDetail Components of Property and Equipment (Detail) Details 49 false false R50.htm 2405403 - Disclosure - Property and Equipment - Additional Information (Detail) Sheet http://www.cumulus.com/role/PropertyAndEquipmentAdditionalInformationDetail Property and Equipment - Additional Information (Detail) Details 50 false false R51.htm 2406402 - Disclosure - Changes in Intangible Assets Other Than Goodwill (Detail) Sheet http://www.cumulus.com/role/ChangesInIntangibleAssetsOtherThanGoodwillDetail Changes in Intangible Assets Other Than Goodwill (Detail) Details 51 false false R52.htm 2406403 - Disclosure - Changes in Goodwill (Detail) Sheet http://www.cumulus.com/role/ChangesInGoodwillDetail Changes in Goodwill (Detail) Details 52 false false R53.htm 2406404 - Disclosure - Estimated Future Amortization Expense (Detail) Sheet http://www.cumulus.com/role/EstimatedFutureAmortizationExpenseDetail Estimated Future Amortization Expense (Detail) Details 53 false false R54.htm 2406405 - Disclosure - Intangible Assets and Goodwill - Additional Information (Detail) Sheet http://www.cumulus.com/role/IntangibleAssetsAndGoodwillAdditionalInformationDetail Intangible Assets and Goodwill - Additional Information (Detail) Details 54 false false R55.htm 2407402 - Disclosure - Accounts Payable and Accrued Expenses (Detail) Sheet http://www.cumulus.com/role/AccountsPayableAndAccruedExpensesDetail Accounts Payable and Accrued Expenses (Detail) Details http://www.cumulus.com/role/AccountsPayableAndAccruedExpensesTables 55 false false R56.htm 2408402 - Disclosure - Long term debt (Detail) Sheet http://www.cumulus.com/role/LongTermDebtDetail Long term debt (Detail) Details 56 false false R57.htm 2408403 - Disclosure - Future Maturities of Long-Term Debt (Detail) Sheet http://www.cumulus.com/role/FutureMaturitiesOfLongTermDebtDetail Future Maturities of Long-Term Debt (Detail) Details 57 false false R58.htm 2408404 - Disclosure - Long-Term Debt - Additional Information (Detail) Sheet http://www.cumulus.com/role/LongTermDebtAdditionalInformationDetail Long-Term Debt - Additional Information (Detail) Details 58 false false R59.htm 2409402 - Disclosure - Fair Value Measurements (Financial Assets and Liabilities and Non-Financial Assets and Liabilities Measured at Fair Value on Recurring Basis) (Detail) Sheet http://www.cumulus.com/role/FairValueMeasurementsFinancialAssetsAndLiabilitiesAndNonFinancialAssetsAndLiabilitiesMeasuredAtFairValueOnRecurringBasisDetail Fair Value Measurements (Financial Assets and Liabilities and Non-Financial Assets and Liabilities Measured at Fair Value on Recurring Basis) (Detail) Details http://www.cumulus.com/role/FairValueMeasurementsTables 59 false false R60.htm 2409403 - Disclosure - Fair Value Measurements (Additional Information for Financial Assets and Liabilities and Non-Financial Assets and Liabilities Measured at Fair Value on Recurring Basis) (Detail) Sheet http://www.cumulus.com/role/FairValueMeasurementsAdditionalInformationForFinancialAssetsAndLiabilitiesAndNonFinancialAssetsAndLiabilitiesMeasuredAtFairValueOnRecurringBasisDetail Fair Value Measurements (Additional Information for Financial Assets and Liabilities and Non-Financial Assets and Liabilities Measured at Fair Value on Recurring Basis) (Detail) Details http://www.cumulus.com/role/FairValueMeasurementsTables 60 false false R61.htm 2409404 - Disclosure - Fair Value Measurements (Components of Change in Fair Value) (Detail) Sheet http://www.cumulus.com/role/FairValueMeasurementsComponentsOfChangeInFairValueDetail Fair Value Measurements (Components of Change in Fair Value) (Detail) Details http://www.cumulus.com/role/FairValueMeasurementsTables 61 false false R62.htm 2409405 - Disclosure - Fair Value Measurements (Quantitative Information Regarding Significant Unobservable Inputs) (Detail) Sheet http://www.cumulus.com/role/FairValueMeasurementsQuantitativeInformationRegardingSignificantUnobservableInputsDetail Fair Value Measurements (Quantitative Information Regarding Significant Unobservable Inputs) (Detail) Details http://www.cumulus.com/role/FairValueMeasurementsTables 62 false false R63.htm 2409406 - Disclosure - Fair Value Measurements (Gross Amounts and Fair Value of Debt) (Detail) Sheet http://www.cumulus.com/role/FairValueMeasurementsGrossAmountsAndFairValueOfDebtDetail Fair Value Measurements (Gross Amounts and Fair Value of Debt) (Detail) Details http://www.cumulus.com/role/FairValueMeasurementsTables 63 false false R64.htm 2409407 - Disclosure - Fair Value Measurements (Additional Information) (Detail) Sheet http://www.cumulus.com/role/FairValueMeasurementsAdditionalInformationDetail Fair Value Measurements (Additional Information) (Detail) Details http://www.cumulus.com/role/FairValueMeasurementsTables 64 false false R65.htm 2410401 - Disclosure - Stockholders' Equity - Additional Information (Detail) Sheet http://www.cumulus.com/role/StockholdersEquityAdditionalInformationDetail Stockholders' Equity - Additional Information (Detail) Details 65 false false R66.htm 2411401 - Disclosure - Redeemable Preferred Stock - Additional Information (Detail) Sheet http://www.cumulus.com/role/RedeemablePreferredStockAdditionalInformationDetail Redeemable Preferred Stock - Additional Information (Detail) Details 66 false false R67.htm 2412402 - Disclosure - Stock-Based Compensation Expense - Additional Information (Detail) Sheet http://www.cumulus.com/role/StockBasedCompensationExpenseAdditionalInformationDetail Stock-Based Compensation Expense - Additional Information (Detail) Details 67 false false R68.htm 2412403 - Disclosure - Summary of Equity Award Activity (Detail) Sheet http://www.cumulus.com/role/SummaryOfEquityAwardActivityDetail Summary of Equity Award Activity (Detail) Details 68 false false R69.htm 2412404 - Disclosure - Summary of Company's Restricted Common Stock Awards Activity (Detail) Sheet http://www.cumulus.com/role/SummaryOfCompanysRestrictedCommonStockAwardsActivityDetail Summary of Company's Restricted Common Stock Awards Activity (Detail) Details 69 false false R70.htm 2413402 - Disclosure - Income Tax Expense (Benefit) (Detail) Sheet http://www.cumulus.com/role/IncomeTaxExpenseBenefitDetail Income Tax Expense (Benefit) (Detail) Details 70 false false R71.htm 2413403 - Disclosure - Income Taxes - Additional Information (Detail) Sheet http://www.cumulus.com/role/IncomeTaxesAdditionalInformationDetail Income Taxes - Additional Information (Detail) Details 71 false false R72.htm 2413404 - Disclosure - Total Income Tax Expense (Benefit) (Detail) Sheet http://www.cumulus.com/role/TotalIncomeTaxExpenseBenefitDetail Total Income Tax Expense (Benefit) (Detail) Details 72 false false R73.htm 2413405 - Disclosure - Tax Effects of Temporary Differences That Give Rise to Significant Portions of Deferred Tax Assets and Liabilities (Detail) Sheet http://www.cumulus.com/role/TaxEffectsOfTemporaryDifferencesThatGiveRiseToSignificantPortionsOfDeferredTaxAssetsAndLiabilitiesDetail Tax Effects of Temporary Differences That Give Rise to Significant Portions of Deferred Tax Assets and Liabilities (Detail) Details 73 false false R74.htm 2413406 - Disclosure - Income Taxes Schedule of Unrecognized Tax Benefits Roll Forward (Details) Sheet http://www.cumulus.com/role/IncomeTaxesScheduleOfUnrecognizedTaxBenefitsRollForwardDetails Income Taxes Schedule of Unrecognized Tax Benefits Roll Forward (Details) Details 74 false false R75.htm 2414402 - Disclosure - (Loss) Earnings Per Share ("EPS") (Computation of Basic and Diluted Earnings per Common Share) (Detail) Sheet http://www.cumulus.com/role/LossEarningsPerShareEpsComputationOfBasicAndDilutedEarningsPerCommonShareDetail (Loss) Earnings Per Share ("EPS") (Computation of Basic and Diluted Earnings per Common Share) (Detail) Details http://www.cumulus.com/role/LossEarningsPerShareEpsTables 75 false false R76.htm 2415402 - Disclosure - Leases - Additional Information (Detail) Sheet http://www.cumulus.com/role/LeasesAdditionalInformationDetail Leases - Additional Information (Detail) Details 76 false false R77.htm 2415403 - Disclosure - Future Minimum Lease Payments under Non-Cancelable Operating Leases (Detail) Sheet http://www.cumulus.com/role/FutureMinimumLeasePaymentsUnderNonCancelableOperatingLeasesDetail Future Minimum Lease Payments under Non-Cancelable Operating Leases (Detail) Details 77 false false R78.htm 2416401 - Disclosure - Commitments and Contingencies - Additional Information (Detail) Sheet http://www.cumulus.com/role/CommitmentsAndContingenciesAdditionalInformationDetail Commitments and Contingencies - Additional Information (Detail) Details 78 false false R79.htm 2417402 - Disclosure - Quarterly Results (Unaudited) (Detail) Sheet http://www.cumulus.com/role/QuarterlyResultsUnauditedDetail Quarterly Results (Unaudited) (Detail) Details http://www.cumulus.com/role/QuarterlyResultsUnauditedTables 79 false false R80.htm 2418402 - Disclosure - Supplemental Condensed Consolidating Financial Information (Narrative) (Details) Sheet http://www.cumulus.com/role/SupplementalCondensedConsolidatingFinancialInformationNarrativeDetails Supplemental Condensed Consolidating Financial Information (Narrative) (Details) Details http://www.cumulus.com/role/SupplementalCondensedConsolidatingFinancialInformationTables 80 false false R81.htm 2418403 - Disclosure - Supplemental Condensed Consolidating Financial Information (Condensed Consolidating Statements of Operations) (Detail) Sheet http://www.cumulus.com/role/SupplementalCondensedConsolidatingFinancialInformationCondensedConsolidatingStatementsOfOperationsDetail Supplemental Condensed Consolidating Financial Information (Condensed Consolidating Statements of Operations) (Detail) Details http://www.cumulus.com/role/SupplementalCondensedConsolidatingFinancialInformationTables 81 false false R82.htm 2418404 - Disclosure - Supplemental Condensed Consolidating Financial Information (Condensed Consolidating Statement of Operations) (Additional Information) (Detail) Sheet http://www.cumulus.com/role/SupplementalCondensedConsolidatingFinancialInformationCondensedConsolidatingStatementOfOperationsAdditionalInformationDetail Supplemental Condensed Consolidating Financial Information (Condensed Consolidating Statement of Operations) (Additional Information) (Detail) Details http://www.cumulus.com/role/SupplementalCondensedConsolidatingFinancialInformationTables 82 false false R83.htm 2418405 - Disclosure - Supplemental Condensed Consolidating Financial Information (Condensed Consolidating Balance Sheets) (Detail) Sheet http://www.cumulus.com/role/SupplementalCondensedConsolidatingFinancialInformationCondensedConsolidatingBalanceSheetsDetail Supplemental Condensed Consolidating Financial Information (Condensed Consolidating Balance Sheets) (Detail) Details http://www.cumulus.com/role/SupplementalCondensedConsolidatingFinancialInformationTables 83 false false R84.htm 2418406 - Disclosure - Supplemental Condensed Consolidating Financial Information (Condensed Consolidating Balance Sheets) (Additional Information) (Detail) Sheet http://www.cumulus.com/role/SupplementalCondensedConsolidatingFinancialInformationCondensedConsolidatingBalanceSheetsAdditionalInformationDetail Supplemental Condensed Consolidating Financial Information (Condensed Consolidating Balance Sheets) (Additional Information) (Detail) Details http://www.cumulus.com/role/SupplementalCondensedConsolidatingFinancialInformationTables 84 false false R85.htm 2418407 - Disclosure - Supplemental Condensed Consolidating Financial Information (Condensed Consolidating Statements of Cash Flows) (Detail) Sheet http://www.cumulus.com/role/SupplementalCondensedConsolidatingFinancialInformationCondensedConsolidatingStatementsOfCashFlowsDetail Supplemental Condensed Consolidating Financial Information (Condensed Consolidating Statements of Cash Flows) (Detail) Details http://www.cumulus.com/role/SupplementalCondensedConsolidatingFinancialInformationTables 85 false false R86.htm 2420401 - Disclosure - Schedule II, Valuation and Qualifying Accounts (Detail) Sheet http://www.cumulus.com/role/ScheduleIiValuationAndQualifyingAccountsDetail Schedule II, Valuation and Qualifying Accounts (Detail) Details 86 false false All Reports Book All Reports cmls-20151231.xml cmls-20151231.xsd cmls-20151231_cal.xml cmls-20151231_def.xml cmls-20151231_lab.xml cmls-20151231_pre.xml true true