3.20.1 html 89 268 1 true 34 0 false 6 false false R1.htm 0001001 - Document - Document and Entity Information Sheet http://www.monitronics.com/role/DocumentandEntityInformation Document and Entity Information Cover 1 false false R2.htm 1001002 - Statement - Condensed Consolidated Balance Sheets Sheet http://www.monitronics.com/role/CondensedConsolidatedBalanceSheets Condensed Consolidated Balance Sheets Statements 2 false false R3.htm 1002003 - Statement - Condensed Consolidated Balance Sheets (Parenthetical) Sheet http://www.monitronics.com/role/CondensedConsolidatedBalanceSheetsParenthetical Condensed Consolidated Balance Sheets (Parenthetical) Statements 3 false false R4.htm 1003004 - Statement - Condensed Consolidated Statements of Operations and Comprehensive Income (Loss) Sheet http://www.monitronics.com/role/CondensedConsolidatedStatementsofOperationsandComprehensiveIncomeLoss Condensed Consolidated Statements of Operations and Comprehensive Income (Loss) Statements 4 false false R5.htm 1004005 - Statement - Condensed Consolidated Statements of Cash Flows Sheet http://www.monitronics.com/role/CondensedConsolidatedStatementsofCashFlows Condensed Consolidated Statements of Cash Flows Statements 5 false false R6.htm 1005006 - Statement - Condensed Consolidated Statement of Stockholder's Equity (Deficit) Sheet http://www.monitronics.com/role/CondensedConsolidatedStatementofStockholdersEquityDeficit Condensed Consolidated Statement of Stockholder's Equity (Deficit) Statements 6 false false R7.htm 2101101 - Disclosure - Basis of Presentation Sheet http://www.monitronics.com/role/BasisofPresentation Basis of Presentation Notes 7 false false R8.htm 2102102 - Disclosure - Recent Accounting Pronouncements Sheet http://www.monitronics.com/role/RecentAccountingPronouncements Recent Accounting Pronouncements Notes 8 false false R9.htm 2105103 - Disclosure - Goodwill Sheet http://www.monitronics.com/role/Goodwill Goodwill Notes 9 false false R10.htm 2109104 - Disclosure - Other Accrued Liabilities Sheet http://www.monitronics.com/role/OtherAccruedLiabilities Other Accrued Liabilities Notes 10 false false R11.htm 2112105 - Disclosure - Debt Sheet http://www.monitronics.com/role/Debt Debt Notes 11 false false R12.htm 2117106 - Disclosure - Derivatives Sheet http://www.monitronics.com/role/Derivatives Derivatives Notes 12 false false R13.htm 2121107 - Disclosure - Fair Value Measurements Sheet http://www.monitronics.com/role/FairValueMeasurements Fair Value Measurements Notes 13 false false R14.htm 2125108 - Disclosure - Stockholders' Equity Sheet http://www.monitronics.com/role/StockholdersEquity Stockholders' Equity Notes 14 false false R15.htm 2129109 - Disclosure - Basic and Diluted Earnings Per Common Share Sheet http://www.monitronics.com/role/BasicandDilutedEarningsPerCommonShare Basic and Diluted Earnings Per Common Share Notes 15 false false R16.htm 2131110 - Disclosure - Commitments, Contingencies and Other Liabilities Sheet http://www.monitronics.com/role/CommitmentsContingenciesandOtherLiabilities Commitments, Contingencies and Other Liabilities Notes 16 false false R17.htm 2132111 - Disclosure - Revenue Recognition Sheet http://www.monitronics.com/role/RevenueRecognition Revenue Recognition Notes 17 false false R18.htm 2136112 - Disclosure - Leases Sheet http://www.monitronics.com/role/Leases Leases Notes 18 false false R19.htm 2142113 - Disclosure - Consolidating Guarantor Financial Information Sheet http://www.monitronics.com/role/ConsolidatingGuarantorFinancialInformation Consolidating Guarantor Financial Information Notes 19 false false R20.htm 2203201 - Disclosure - Recent Accounting Pronouncements (Policies) Sheet http://www.monitronics.com/role/RecentAccountingPronouncementsPolicies Recent Accounting Pronouncements (Policies) Policies http://www.monitronics.com/role/RecentAccountingPronouncements 20 false false R21.htm 2306301 - Disclosure - Goodwill (Tables) Sheet http://www.monitronics.com/role/GoodwillTables Goodwill (Tables) Tables http://www.monitronics.com/role/Goodwill 21 false false R22.htm 2310302 - Disclosure - Other Accrued Liabilities (Tables) Sheet http://www.monitronics.com/role/OtherAccruedLiabilitiesTables Other Accrued Liabilities (Tables) Tables http://www.monitronics.com/role/OtherAccruedLiabilities 22 false false R23.htm 2313303 - Disclosure - Debt (Tables) Sheet http://www.monitronics.com/role/DebtTables Debt (Tables) Tables http://www.monitronics.com/role/Debt 23 false false R24.htm 2318304 - Disclosure - Derivatives (Tables) Sheet http://www.monitronics.com/role/DerivativesTables Derivatives (Tables) Tables http://www.monitronics.com/role/Derivatives 24 false false R25.htm 2322305 - Disclosure - Fair Value Measurements (Tables) Sheet http://www.monitronics.com/role/FairValueMeasurementsTables Fair Value Measurements (Tables) Tables http://www.monitronics.com/role/FairValueMeasurements 25 false false R26.htm 2326306 - Disclosure - Stockholders' Equity (Tables) Sheet http://www.monitronics.com/role/StockholdersEquityTables Stockholders' Equity (Tables) Tables http://www.monitronics.com/role/StockholdersEquity 26 false false R27.htm 2333307 - Disclosure - Revenue Recognition (Tables) Sheet http://www.monitronics.com/role/RevenueRecognitionTables Revenue Recognition (Tables) Tables http://www.monitronics.com/role/RevenueRecognition 27 false false R28.htm 2337308 - Disclosure - Leases (Tables) Sheet http://www.monitronics.com/role/LeasesTables Leases (Tables) Tables http://www.monitronics.com/role/Leases 28 false false R29.htm 2404401 - Disclosure - Recent Accounting Pronouncements - Narrative (Details) Sheet http://www.monitronics.com/role/RecentAccountingPronouncementsNarrativeDetails Recent Accounting Pronouncements - Narrative (Details) Details 29 false false R30.htm 2407402 - Disclosure - Goodwill - Schedule of Goodwill (Details) Sheet http://www.monitronics.com/role/GoodwillScheduleofGoodwillDetails Goodwill - Schedule of Goodwill (Details) Details 30 false false R31.htm 2408403 - Disclosure - Goodwill - Narrative (Details) Sheet http://www.monitronics.com/role/GoodwillNarrativeDetails Goodwill - Narrative (Details) Details 31 false false R32.htm 2411404 - Disclosure - Other Accrued Liabilities - Schedule of Other Accrued Liabilities (Details) Sheet http://www.monitronics.com/role/OtherAccruedLiabilitiesScheduleofOtherAccruedLiabilitiesDetails Other Accrued Liabilities - Schedule of Other Accrued Liabilities (Details) Details 32 false false R33.htm 2414405 - Disclosure - Debt - Schedule of Long-Term Debt (Details) Sheet http://www.monitronics.com/role/DebtScheduleofLongTermDebtDetails Debt - Schedule of Long-Term Debt (Details) Details 33 false false R34.htm 2415406 - Disclosure - Debt - Narrative (Details) Sheet http://www.monitronics.com/role/DebtNarrativeDetails Debt - Narrative (Details) Details 34 false false R35.htm 2416407 - Disclosure - Debt - Schedule of Long Term Debt Maturity (Details) Sheet http://www.monitronics.com/role/DebtScheduleofLongTermDebtMaturityDetails Debt - Schedule of Long Term Debt Maturity (Details) Details 35 false false R36.htm 2419408 - Disclosure - Derivatives - Narrative (Details) Sheet http://www.monitronics.com/role/DerivativesNarrativeDetails Derivatives - Narrative (Details) Details 36 false false R37.htm 2420409 - Disclosure - Derivatives - Summary of Derivatives Designated as Cash Flow Hedges (Details) Sheet http://www.monitronics.com/role/DerivativesSummaryofDerivativesDesignatedasCashFlowHedgesDetails Derivatives - Summary of Derivatives Designated as Cash Flow Hedges (Details) Details 37 false false R38.htm 2423410 - Disclosure - Fair Value Measurements - Schedule of Fair Value Measured On Recurring Basis (Details) Sheet http://www.monitronics.com/role/FairValueMeasurementsScheduleofFairValueMeasuredOnRecurringBasisDetails Fair Value Measurements - Schedule of Fair Value Measured On Recurring Basis (Details) Details 38 false false R39.htm 2424411 - Disclosure - Fair Value Measurements - Schedule of Instruments Not Carried at Fair Value (Details) Sheet http://www.monitronics.com/role/FairValueMeasurementsScheduleofInstrumentsNotCarriedatFairValueDetails Fair Value Measurements - Schedule of Instruments Not Carried at Fair Value (Details) Details 39 false false R40.htm 2427412 - Disclosure - Stockholders' Equity - Narrative (Details) Sheet http://www.monitronics.com/role/StockholdersEquityNarrativeDetails Stockholders' Equity - Narrative (Details) Details 40 false false R41.htm 2428413 - Disclosure - Stockholders' Equity - Summary of Accumulated Other Comprehensive Income (Loss) (Details) Sheet http://www.monitronics.com/role/StockholdersEquitySummaryofAccumulatedOtherComprehensiveIncomeLossDetails Stockholders' Equity - Summary of Accumulated Other Comprehensive Income (Loss) (Details) Details 41 false false R42.htm 2430414 - Disclosure - Basic and Diluted Earnings Per Common Share - Narrative (Details) Sheet http://www.monitronics.com/role/BasicandDilutedEarningsPerCommonShareNarrativeDetails Basic and Diluted Earnings Per Common Share - Narrative (Details) Details 42 false false R43.htm 2434415 - Disclosure - Revenue Recognition - Disaggregated Revenue by Source (Details) Sheet http://www.monitronics.com/role/RevenueRecognitionDisaggregatedRevenuebySourceDetails Revenue Recognition - Disaggregated Revenue by Source (Details) Details 43 false false R44.htm 2435416 - Disclosure - Revenue Recognition - Contract Balances (Details) Sheet http://www.monitronics.com/role/RevenueRecognitionContractBalancesDetails Revenue Recognition - Contract Balances (Details) Details 44 false false R45.htm 2438417 - Disclosure - Leases - Components of Lease Expense (Details) Sheet http://www.monitronics.com/role/LeasesComponentsofLeaseExpenseDetails Leases - Components of Lease Expense (Details) Details 45 false false R46.htm 2439418 - Disclosure - Leases - Remaining Lease Term and Discount Rate (Details) Sheet http://www.monitronics.com/role/LeasesRemainingLeaseTermandDiscountRateDetails Leases - Remaining Lease Term and Discount Rate (Details) Details 46 false false R47.htm 2440419 - Disclosure - Leases - Supplemental Cash Flow Information (Details) Sheet http://www.monitronics.com/role/LeasesSupplementalCashFlowInformationDetails Leases - Supplemental Cash Flow Information (Details) Details 47 false false R48.htm 2441420 - Disclosure - Leases - Maturities of Lease Liabilities (Details) Sheet http://www.monitronics.com/role/LeasesMaturitiesofLeaseLiabilitiesDetails Leases - Maturities of Lease Liabilities (Details) Details 48 false false R9999.htm Uncategorized Items - mtii-20200331.htm Sheet http://xbrl.sec.gov/role/uncategorizedFacts Uncategorized Items - mtii-20200331.htm Cover 49 false false All Reports Book All Reports mtii-20200331.htm moniex311q12020ng.htm moniex312q32019ng.htm moniex32q12020ng.htm mtii-20200331.xsd mtii-20200331_cal.xml mtii-20200331_def.xml mtii-20200331_lab.xml mtii-20200331_pre.xml http://fasb.org/us-gaap/2019-01-31 http://fasb.org/srt/2019-01-31 http://xbrl.sec.gov/dei/2019-01-31 true true