Annual report pursuant to Section 13 and 15(d)

Security Networks Acquisition - Pro Forma (Details)

v2.4.1.9
Security Networks Acquisition - Pro Forma (Details) (USD $)
In Thousands, unless otherwise specified
 3 Months Ended 12 Months Ended
Dec. 31, 2014
Sep. 30, 2014
Jun. 30, 2014
Mar. 31, 2014
Dec. 31, 2013
Sep. 30, 2013
Jun. 30, 2013
Mar. 31, 2013
Dec. 31, 2014
Dec. 31, 2013
Dec. 31, 2012
Business Acquisition [Line Items]                      
Net revenue $ 135,862us-gaap_SalesRevenueServicesNet $ 136,027us-gaap_SalesRevenueServicesNet $ 134,696us-gaap_SalesRevenueServicesNet $ 132,864us-gaap_SalesRevenueServicesNet $ 132,758us-gaap_SalesRevenueServicesNet $ 115,844us-gaap_SalesRevenueServicesNet $ 102,273us-gaap_SalesRevenueServicesNet $ 100,158us-gaap_SalesRevenueServicesNet $ 539,449us-gaap_SalesRevenueServicesNet $ 451,033us-gaap_SalesRevenueServicesNet $ 344,953us-gaap_SalesRevenueServicesNet
Net loss                 (29,717)us-gaap_NetIncomeLoss (16,687)us-gaap_NetIncomeLoss (16,776)us-gaap_NetIncomeLoss
Business Acquisition, Pro Forma Information [Abstract]                      
Net revenue                   515,792us-gaap_BusinessAcquisitionsProFormaRevenue 420,716us-gaap_BusinessAcquisitionsProFormaRevenue
Net loss                   (30,871)us-gaap_BusinessAcquisitionsProFormaIncomeLossFromContinuingOperationsBeforeChangesInAccountingAndExtraordinaryItemsNetOfTax (70,491)us-gaap_BusinessAcquisitionsProFormaIncomeLossFromContinuingOperationsBeforeChangesInAccountingAndExtraordinaryItemsNetOfTax
Security Networks Acquisition                      
Business Acquisition, Pro Forma Information [Abstract]                      
Deferred Revenue Fair Value Adjustment Impact on Net Revenue                   2,715mtii_BusinessAcquisitionDeferredRevenueFairValueAdjustmentImpactOnNetRevenue
/ us-gaap_BusinessAcquisitionAxis
= mtii_SecurityNetworksLLCAndCertainAffiliatedEntitiesMember 		 
Deferred Revenue Fair Value Adjustment Impact on Pro Forma Net Revenue                     2,715mtii_BusinessAcquisitionDeferredRevenueFairValueAdjustmentImpactOnProFormaNetRevenue
/ us-gaap_BusinessAcquisitionAxis
= mtii_SecurityNetworksLLCAndCertainAffiliatedEntitiesMember
Non-Recurring Acquisition Costs Included in Pro Forma Net Loss                   2,470mtii_NonRecurringAcquisitionCostsIncludedinProFormaNetLoss
/ us-gaap_BusinessAcquisitionAxis
= mtii_SecurityNetworksLLCAndCertainAffiliatedEntitiesMember 		 
Non-Recurring Acquisition Costs Included in Net Loss                   $ 2,470mtii_NonRecurringAcquisitionCostsIncludedinNetLoss
/ us-gaap_BusinessAcquisitionAxis
= mtii_SecurityNetworksLLCAndCertainAffiliatedEntitiesMember