Annual report pursuant to Section 13 and 15(d)

Long-Term Debt - Schedule of Refinancing Costs (Details)

Long-Term Debt - Schedule of Refinancing Costs (Details) (USD $)
In Thousands, unless otherwise specified
12 Months Ended
Dec. 31, 2014
Dec. 31, 2013
Dec. 31, 2012
Debt Disclosure [Abstract]      
Amortization of Financing Costs     $ 389us-gaap_AmortizationOfFinancingCosts
Accelerated Amortization of Securitized Refinancing Costs     6,679mtii_AcceleratedAmortizationOfSecuritizedRefinancingCosts
Other Refinancing Costs     7,628mtii_OtherRefinancingCosts
Gains (Losses) on Extinguishment of Debt     (8,451)us-gaap_GainsLossesOnExtinguishmentOfDebt
Refinancing expense $ 0mtii_RefinancingExpense $ 0mtii_RefinancingExpense $ 6,245mtii_RefinancingExpense