Quarterly report pursuant to Section 13 or 15(d)

LiveWatch Acquisition - Schedule of Business Acquisitions (Details)

v2.4.1.9
LiveWatch Acquisition - Schedule of Business Acquisitions (Details) (USD $)
In Thousands, unless otherwise specified
Mar. 31, 2015
Dec. 31, 2014
Feb. 23, 2015
Business Acquisition [Line Items]      
Goodwill $ 563,011us-gaap_Goodwill $ 527,502us-gaap_Goodwill  
LiveWatch Security, LLC      
Business Acquisition [Line Items]      
Cash     784us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCashAndEquivalents
/ us-gaap_BusinessAcquisitionAxis
= mtii_LiveWatchSecurityLLCMember
Trade receivables     273us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentAssetsReceivables
/ us-gaap_BusinessAcquisitionAxis
= mtii_LiveWatchSecurityLLCMember
Other current assets     599us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentAssetsOther
/ us-gaap_BusinessAcquisitionAxis
= mtii_LiveWatchSecurityLLCMember
Property and equipment     362us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedPropertyPlantAndEquipment
/ us-gaap_BusinessAcquisitionAxis
= mtii_LiveWatchSecurityLLCMember
Goodwill     35,509us-gaap_Goodwill
/ us-gaap_BusinessAcquisitionAxis
= mtii_LiveWatchSecurityLLCMember
Current liabilities     (6,600)us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentLiabilitiesOther
/ us-gaap_BusinessAcquisitionAxis
= mtii_LiveWatchSecurityLLCMember
Fair value of consideration transferred     57,127us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedNet
/ us-gaap_BusinessAcquisitionAxis
= mtii_LiveWatchSecurityLLCMember
Subscriber accounts | LiveWatch Security, LLC      
Business Acquisition [Line Items]      
Intangible assets, other than goodwill, acquired     24,900us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedIntangibleAssetsOtherThanGoodwill
/ us-gaap_BusinessAcquisitionAxis
= mtii_LiveWatchSecurityLLCMember
/ us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis
= mtii_SubscriberAccountsMember
Other intangible asset | LiveWatch Security, LLC      
Business Acquisition [Line Items]      
Intangible assets, other than goodwill, acquired     $ 1,300us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedIntangibleAssetsOtherThanGoodwill
/ us-gaap_BusinessAcquisitionAxis
= mtii_LiveWatchSecurityLLCMember
/ us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis
= us-gaap_OtherIntangibleAssetsMember