XML 23 R50.htm IDEA: XBRL DOCUMENT v2.4.1.9
LONG-TERM DEBT - Senior Subordinated Notes (Details) (USD $)
Sep. 30, 2014
Sep. 30, 2013
Aug. 15, 2014
Mar. 31, 2012
Aug. 31, 2004
Feb. 28, 2005
Aug. 31, 2013
Debt Instrument [Line Items]              
Accrued interest $ 8,659,000us-gaap_InterestPayableCurrent $ 23,296,000us-gaap_InterestPayableCurrent          
Senior Subordinated Notes | 2004 7 1/8% Senior Subordinated Notes              
Debt Instrument [Line Items]              
Loan face amount         225,000,000.0us-gaap_DebtInstrumentFaceAmount
/ us-gaap_DebtInstrumentAxis
= mtga_SeniorSubordinatedNotes20047Point125PercentMember
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_SeniorSubordinatedNotesMember
   
Note stated interest rate 7.125%us-gaap_DebtInstrumentInterestRateStatedPercentage
/ us-gaap_DebtInstrumentAxis
= mtga_SeniorSubordinatedNotes20047Point125PercentMember
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_SeniorSubordinatedNotesMember
7.125%us-gaap_DebtInstrumentInterestRateStatedPercentage
/ us-gaap_DebtInstrumentAxis
= mtga_SeniorSubordinatedNotes20047Point125PercentMember
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_SeniorSubordinatedNotesMember
    7.125%us-gaap_DebtInstrumentInterestRateStatedPercentage
/ us-gaap_DebtInstrumentAxis
= mtga_SeniorSubordinatedNotes20047Point125PercentMember
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_SeniorSubordinatedNotesMember
   
Principal amount tendered and exchanged       203,800,000mtga_DebtInstrumentPrincipalAmountTenderedAndExchanged
/ us-gaap_DebtInstrumentAxis
= mtga_SeniorSubordinatedNotes20047Point125PercentMember
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_SeniorSubordinatedNotesMember
     
Debt outstanding     21,200,000mtga_LongTermDebtIncludingDueToRelatedPartiesExcludingDeferredIncomeGainOnSaleOfDerivativesNet
/ us-gaap_DebtInstrumentAxis
= mtga_SeniorSubordinatedNotes20047Point125PercentMember
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_SeniorSubordinatedNotesMember
       
Accrued interest   188,000us-gaap_InterestPayableCurrent
/ us-gaap_DebtInstrumentAxis
= mtga_SeniorSubordinatedNotes20047Point125PercentMember
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_SeniorSubordinatedNotesMember
         
Senior Subordinated Notes | 2005 6 7/8% Senior Subordinated Notes              
Debt Instrument [Line Items]              
Loan face amount           150,000,000.0us-gaap_DebtInstrumentFaceAmount
/ us-gaap_DebtInstrumentAxis
= mtga_SeniorSubordinatedNotes20056Point875PercentMember
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_SeniorSubordinatedNotesMember
 
Note stated interest rate 6.875%us-gaap_DebtInstrumentInterestRateStatedPercentage
/ us-gaap_DebtInstrumentAxis
= mtga_SeniorSubordinatedNotes20056Point875PercentMember
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_SeniorSubordinatedNotesMember
6.875%us-gaap_DebtInstrumentInterestRateStatedPercentage
/ us-gaap_DebtInstrumentAxis
= mtga_SeniorSubordinatedNotes20056Point875PercentMember
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_SeniorSubordinatedNotesMember
      6.875%us-gaap_DebtInstrumentInterestRateStatedPercentage
/ us-gaap_DebtInstrumentAxis
= mtga_SeniorSubordinatedNotes20056Point875PercentMember
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_SeniorSubordinatedNotesMember
 
Principal amount tendered and exchanged       140,300,000mtga_DebtInstrumentPrincipalAmountTenderedAndExchanged
/ us-gaap_DebtInstrumentAxis
= mtga_SeniorSubordinatedNotes20056Point875PercentMember
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_SeniorSubordinatedNotesMember
     
Debt outstanding 9,700,000mtga_LongTermDebtIncludingDueToRelatedPartiesExcludingDeferredIncomeGainOnSaleOfDerivativesNet
/ us-gaap_DebtInstrumentAxis
= mtga_SeniorSubordinatedNotes20056Point875PercentMember
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_SeniorSubordinatedNotesMember
           
Accrued interest 83,000us-gaap_InterestPayableCurrent
/ us-gaap_DebtInstrumentAxis
= mtga_SeniorSubordinatedNotes20056Point875PercentMember
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_SeniorSubordinatedNotesMember
83,000us-gaap_InterestPayableCurrent
/ us-gaap_DebtInstrumentAxis
= mtga_SeniorSubordinatedNotes20056Point875PercentMember
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_SeniorSubordinatedNotesMember
         
Senior Subordinated Notes | 2012 11 % Senior Subordinated Notes              
Debt Instrument [Line Items]              
Loan face amount       344,200,000.0us-gaap_DebtInstrumentFaceAmount
/ us-gaap_DebtInstrumentAxis
= mtga_SeniorSubordinatedNotes201211PercentMember
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_SeniorSubordinatedNotesMember
     
Note stated interest rate 11.00%us-gaap_DebtInstrumentInterestRateStatedPercentage
/ us-gaap_DebtInstrumentAxis
= mtga_SeniorSubordinatedNotes201211PercentMember
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_SeniorSubordinatedNotesMember
11.00%us-gaap_DebtInstrumentInterestRateStatedPercentage
/ us-gaap_DebtInstrumentAxis
= mtga_SeniorSubordinatedNotes201211PercentMember
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_SeniorSubordinatedNotesMember
  11.00%us-gaap_DebtInstrumentInterestRateStatedPercentage
/ us-gaap_DebtInstrumentAxis
= mtga_SeniorSubordinatedNotes201211PercentMember
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_SeniorSubordinatedNotesMember
    11.00%us-gaap_DebtInstrumentInterestRateStatedPercentage
/ us-gaap_DebtInstrumentAxis
= mtga_SeniorSubordinatedNotes201211PercentMember
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_SeniorSubordinatedNotesMember
Accrued interest 1,300,000us-gaap_InterestPayableCurrent
/ us-gaap_DebtInstrumentAxis
= mtga_SeniorSubordinatedNotes201211PercentMember
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_SeniorSubordinatedNotesMember
1,300,000us-gaap_InterestPayableCurrent
/ us-gaap_DebtInstrumentAxis
= mtga_SeniorSubordinatedNotes201211PercentMember
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_SeniorSubordinatedNotesMember
         
Redeemable rate       100.00%mtga_DebtInstrumentRedeemableRate
/ us-gaap_DebtInstrumentAxis
= mtga_SeniorSubordinatedNotes201211PercentMember
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_SeniorSubordinatedNotesMember
     
Redeemable rate after cutoff upon change of control       101.00%mtga_DebtInstrumentRedeemableRateUponChangeOfControl
/ us-gaap_DebtInstrumentAxis
= mtga_SeniorSubordinatedNotes201211PercentMember
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_SeniorSubordinatedNotesMember
     
Redeemable rate upon certain conditions       100.00%mtga_DebtInstrumentRedeemableRateUponCertainConditions
/ us-gaap_DebtInstrumentAxis
= mtga_SeniorSubordinatedNotes201211PercentMember
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_SeniorSubordinatedNotesMember
     
Payment in Kind (PIK) interest rate       2.00%mtga_DebtInstrumentPaymentInKindInterestRate
/ us-gaap_DebtInstrumentAxis
= mtga_SeniorSubordinatedNotes201211PercentMember
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_SeniorSubordinatedNotesMember
     
Amount of debt repurchased             69,000,000us-gaap_DebtInstrumentRepurchaseAmount
/ us-gaap_DebtInstrumentAxis
= mtga_SeniorSubordinatedNotes201211PercentMember
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_SeniorSubordinatedNotesMember
Principal outstanding 275,200,000us-gaap_NotesPayable
/ us-gaap_DebtInstrumentAxis
= mtga_SeniorSubordinatedNotes201211PercentMember
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_SeniorSubordinatedNotesMember
           
Senior Subordinated Notes | 2012 11 % Senior Subordinated Notes | 2004 Senior Subordinated Notes              
Debt Instrument [Line Items]              
Principal amount tendered and exchanged       203,800,000mtga_DebtInstrumentPrincipalAmountTenderedAndExchanged
/ us-gaap_DebtInstrumentAxis
= mtga_SeniorSubordinatedNotes201211PercentMember
/ mtga_DebtInstrumentRepurchasedAxis
= mtga_A2004SeniorSubordinatedNotesMember
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_SeniorSubordinatedNotesMember
     
Senior Subordinated Notes | 2012 11 % Senior Subordinated Notes | 2005 Senior Subordinated Notes              
Debt Instrument [Line Items]              
Principal amount tendered and exchanged       140,300,000mtga_DebtInstrumentPrincipalAmountTenderedAndExchanged
/ us-gaap_DebtInstrumentAxis
= mtga_SeniorSubordinatedNotes201211PercentMember
/ mtga_DebtInstrumentRepurchasedAxis
= mtga_A2005SeniorSubordinatedNotesMember
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_SeniorSubordinatedNotesMember
     
Senior Unsecured Notes | 2012 11 % Senior Subordinated Notes              
Debt Instrument [Line Items]              
Amount of debt repurchased             $ 69,000,000us-gaap_DebtInstrumentRepurchaseAmount
/ us-gaap_DebtInstrumentAxis
= mtga_SeniorSubordinatedNotes201211PercentMember
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_UnsecuredDebtMember