Annual report pursuant to Section 13 and 15(d)

Security Networks Acquisition - Narrative (Details)

v2.4.1.9
Security Networks Acquisition - Narrative (Details) (USD $)
In Thousands, except Share data, unless otherwise specified
12 Months Ended 0 Months Ended 3 Months Ended 12 Months Ended
Dec. 31, 2014
Aug. 16, 2013
Jun. 30, 2014
Dec. 31, 2013
Dec. 31, 2012
Business Acquisition [Line Items]          
Par value of shares issued as a consideration (in dollars per share) $ 0.01us-gaap_CommonStockParOrStatedValuePerShare     $ 0.01us-gaap_CommonStockParOrStatedValuePerShare  
Goodwill $ 527,502us-gaap_Goodwill     $ 527,502us-gaap_Goodwill $ 350,213us-gaap_Goodwill
Change in deferred tax asset valuation allowance (16,094)us-gaap_ValuationAllowanceDeferredTaxAssetChangeInAmount        
Security Networks Acquisition          
Business Acquisition [Line Items]          
Fair value of consideration   500,557us-gaap_BusinessCombinationConsiderationTransferred1
/ us-gaap_BusinessAcquisitionAxis
= mtii_SecurityNetworksLLCAndCertainAffiliatedEntitiesMember
     
Cash paid for acquisition   481,834us-gaap_PaymentsToAcquireBusinessesGross
/ us-gaap_BusinessAcquisitionAxis
= mtii_SecurityNetworksLLCAndCertainAffiliatedEntitiesMember
     
Post Closing Working Capital Adjustments   1,057mtii_BusinessCombinationConsiderationPostClosingWorkingCapitalAdjustment
/ us-gaap_BusinessAcquisitionAxis
= mtii_SecurityNetworksLLCAndCertainAffiliatedEntitiesMember
     
Goodwill   177,289us-gaap_Goodwill
/ us-gaap_BusinessAcquisitionAxis
= mtii_SecurityNetworksLLCAndCertainAffiliatedEntitiesMember
     
Goodwill adjustment     989us-gaap_GoodwillPurchaseAccountingAdjustments
/ us-gaap_BusinessAcquisitionAxis
= mtii_SecurityNetworksLLCAndCertainAffiliatedEntitiesMember
   
Change in deferred tax asset valuation allowance       936us-gaap_ValuationAllowanceDeferredTaxAssetChangeInAmount
/ us-gaap_BusinessAcquisitionAxis
= mtii_SecurityNetworksLLCAndCertainAffiliatedEntitiesMember
 
Ascent Capital | Security Networks Acquisition | Common Class A          
Business Acquisition [Line Items]          
Equity issued for acquisition (in shares)   253,333us-gaap_BusinessAcquisitionEquityInterestsIssuedOrIssuableNumberOfSharesIssued
/ us-gaap_BusinessAcquisitionAxis
= mtii_SecurityNetworksLLCAndCertainAffiliatedEntitiesMember
/ dei_LegalEntityAxis
= us-gaap_ParentCompanyMember
/ us-gaap_StatementClassOfStockAxis
= us-gaap_CommonClassAMember
     
Par value of shares issued as a consideration (in dollars per share)   $ 0.01us-gaap_CommonStockParOrStatedValuePerShare
/ us-gaap_BusinessAcquisitionAxis
= mtii_SecurityNetworksLLCAndCertainAffiliatedEntitiesMember
/ dei_LegalEntityAxis
= us-gaap_ParentCompanyMember
/ us-gaap_StatementClassOfStockAxis
= us-gaap_CommonClassAMember
     
Equity issued for acquisition   $ 18,723us-gaap_EquityIssuedInBusinessCombinationFairValueDisclosure
/ us-gaap_BusinessAcquisitionAxis
= mtii_SecurityNetworksLLCAndCertainAffiliatedEntitiesMember
/ dei_LegalEntityAxis
= us-gaap_ParentCompanyMember
/ us-gaap_StatementClassOfStockAxis
= us-gaap_CommonClassAMember